• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for monitoring and / or controlling conditions by a subassembly (13, 14) of a fibrous web or finishing machine (10) comprising one or more process steps (39.1, 39.2, 48, 49, 51, 53, 58) comprising drying (39.1, 39.2 ) and / or profiling (51, 53, 58) as one or more unit processes and wherein the subassembly has a plurality of machine components (44) acting on the web (W) and / or directly or indirectly affected by the web. The method comprises measuring the temperature at one or more points in the subassembly and controlling and / or monitoring the conditions of the subassembly on the basis of said one or more temperature measurements (28). In addition, the invention also relates to a corresponding system, a rotating machine member and a computer program product.
    公开号:FI20185773A1
    申请号:FI20185773
    申请日:2018-09-18
    公开日:2020-03-01
    发明作者:Tatu Pitkänen；Antti Räisänen；Teppo Kojo
    申请人:Valmet Technologies Oy；
    IPC主号:
    专利说明:

    The invention relates to a method for controlling and / or controlling the conditions as part of a process, and to as a unit process and wherein the subassembly has a plurality of machine components that affect the web and / or are directly or indirectly affected by the web. In addition, the invention also relates to a corresponding system, a rotating machine member and a computer software product.
    [2] The moisture and moisture profile of the web web passing through the drying section of the fibrous web machine can be ascertained, typically after the drying section, from a scanner adapted to measure the web. In some, rare cases, a moisture / moisture profile measurement after the press section may also be used. However, with either of these measurements, it is not possible to find out, for example, the change in web web moisture inside the drying section as the drying process progresses in the machine direction. In particular, the real-time moisture profile of the track cannot be accurately ascertained from known measurements on the basis of currently used measurements. It is known to be able to obtain information with different temporary measurements or to use different calculation models that utilize the information generated in the temporary measurements.
    [3] In addition to the drying section of the fibrous web machine, the drying of the web web, as well as profiling, is also performed by finishing parts and machines, i.e. either online or offline. One of their problems with known solutions, for example, is the energy consumption of air / IR drying, which is often suboptimal. Typically, the habit has been to run dryers relatively
    20185773 prh 18 -09- 2018 at high power. In this case, the paper and board are typically over-dried to ensure a sufficient drying result. When there is also a variation in the moisture cross-section of the track, the drying is then set to take place so that the wettest parts of the track are sure to become dry. In this case, the driest parts of the track are overdryed.
    [4] In addition, dryer temperatures are accustomed to being set high to ensure that different species and products with different dry matter contents are dry. Depending on the type or humidity, it is not possible to adjust each infrared or fluidized bed dryer according to the situation, the final humidity is only measured with a roller, the entire drying equipment is run as a single unit and the settings can only be changed according to the measured final humidity. In this case, for example, the adjustment between the dryers cannot be performed properly. Thus, also in the case of the post-processing part and the machine, the track temperature at different parts of the machine is not known precisely, and thus the cross-sectional profile of the track temperature is not known either.
    [5] The above-mentioned approach with the after-treatment part and the machine leads to excessive energy consumption and also to possible quality defects in the final product. Thermal, barrier-coated and siliconized release grades are particularly sensitive. In these species, the pavement / track temperature should be maintained in a specific window in order to achieve the desired species-specific properties of the pavement. Excessive temperature / drying performance, for example in barrier or thermal grades, leads to a deterioration of the properties of the coating. At too low temperatures, for example in the case of release species, in turn, insufficient maturation of the silicone does not take place.
    [6] Condition monitoring and control of calender profiling actuators and other devices that affect the transverse characteristics of the track are also limited by current methods. These devices can be, for example, for profiling a calender nip
    20185773 prh 18 -09- 2018 used induction / air profiling equipment, steam boxes, humidifiers, thermal rollers and zone rollers. In addition to the calender itself and its profiling, the end result of the calendering is affected by the incoming track and its profiles. If there are problems with the calender profiling actuator, for example one of the inductors of the induction profiling device is defective, this is reflected in the paper profile at some level and can be detected by the scanner on the basis of either paper thickness or gloss, i.e. secondary. However, these quantities are affected by many other factors, such as the worn roll coating of the calender. Scanner measurements are also often somewhat inaccurate, especially when measuring thickness. Thus, it can be difficult or even impossible to detect a problem with the profiling device, and it is not possible to say with certainty whether the defect is an induction profiling coil, a clogged nozzle in a steam box / humidifier, a worn roller surface or a calender inlet path and its profile. Thus, there would be a need for such information in order to better identify potential problems and, on that basis, better target the necessary measures to a more impressive location on the calender. All of this should be able to be done as predictably and automatically as possible, allowing the necessary actions to be planned for the next outage or possibly adjusting the operation of the calender to compensate for the error condition in a controlled manner.
    [7] In view of the above drawbacks, there would be a need for an online measurement with a subassembly of a fibrous web machine and also with a finishing machine that allows, for example, drying and / or web profiling even for unit process-specific online adjustment and / or condition monitoring.
    [8] It is an object of the present invention to provide a method, system, rotating machine member and computer program product for controlling and monitoring conditions in a fibrous web or finishing machine subassembly comprising one or more process steps comprising web drying and / or prof.
    20185773 prh 18 -09- 2018 as one or more unit processes. The characteristic features of the method according to the invention are set out in claim 1, the system claim 21, the rotating machine element claim 23 and the computer program product claim 26.
    [9] The invention makes it possible to obtain precise information on the temperature of the web and / or machine components and their temperature profiles as well as the operation of the process equipment by drying and / or profiling in one or more stages with a drying section of a web forming machine and a finishing section or machine, e.g. in connection with coating, surface sizing and / or calendering processes and / or related drying processes. With the measurement according to the invention, it becomes possible, for example, to adjust and thus control the drying process and the associated dryers to their optimum operating point and, for example, to save energy while also improving the quality of the final product.
    [10] The invention enables several different control and condition monitoring applications. The invention is suitable for use, for example, in the drying section of a fibrous web machine as well as in one or more drying, profiling and / or post-treatment processes belonging to a post-treatment section or machine. In general, the invention is suitable for any application involving web web processing where process temperature is relevant. Typically, this is web drying or other processing by a processing device.
    [11] One embodiment of the invention is a cross-machine temperature measurement integrated in machine components, such as rotating machine members and / or static machine components arranged in contact with the web or fabric. On the basis of the temperature measurement, for example, a cross-machine temperature profile can be formed and an online control, condition monitoring and profile adjustment application for drying, coating, surface gluing, wetting and / or calendering processes and devices and profiling actuators can be implemented. Other additional advantages to be obtained with the method, system, rotating machine element and computer program product according to the invention will become apparent from the description and the features of the appended claims.
    [12] The invention, which is not limited to the following embodiments, will be described in more detail with reference to the accompanying drawings, in which:
    20185773 prh 18 -09- 2018
    Figure 1 shows a first schematic diagram of a first example of a fibrous web machine and in particular of its drying section,
    Figure 2 shows an example of a machine component with temperature sensing as a rotating machine member which can be utilized in the invention,
    Figure 3 shows a first example of a finishing part of a fibrous web machine in the form of a rough diagram,
    Figure 4 shows another example of the finishing part of a fibrous web machine in the form of a rough diagram,
    Figure 5 shows a third example of a finishing part of a fibrous web machine in the form of a rough diagram,
    Figure 6 shows another example of a fibrous web machine as a schematic diagram and the associated monitoring and control system,
    Figure 7 shows an example of information generated by temperature measurement,
    Figure 8 shows an example of the sensing of a machine component with temperature sensors in cross section, for example in a temporary installation, and
    Figure 9 shows another example of sensing a machine component with temperature sensors in cross section.
    [13] Figures 1, 3 to 6 show some examples of embodiments of the invention in the form of rough schematic diagrams, in particular in connection with a fibrous web machine 10. Generally, the fibrous web machine 10 includes one or more subassemblies 11-14 as shown in Figures 1 and 6. The fibrous web machine 10 may include a headbox (not shown) in successive subassemblies (starting from the left edge of Figures 1 and 6) of the web web W, in short. 11, a press section 12, a drying section 13 and a possible post-treatment section 14 consisting of one or more process steps.
    The invention relates in particular to subassemblies 13, 14 of fibrous web 10 and post-processing machines which involve drying as a unit process, forming even a single process step of the subassembly or at least one unit process, i.e. subassembly 14 then has process steps other than process steps and / or . In addition, the invention also relates to or to subassemblies 14 of fibrous web 10 and post-processing machines involving profiling, more particularly profiling by heat treatment and / or wetting. The above-mentioned subassemblies are in particular the drying section 13 and the post-processing section 14 (online or offline) of the fibrous web machine 10.
    [15] The drying section 13 typically includes elongate cylindrical machine parts rotatably supported at both ends on the body of the fibrous web machine 10. As such machine parts, Figures 1, 3 and 5 show the upper drying cylinders 35, with which the web web W passed through them is dried, and the lower turning rollers 64, which may also be vacuumed. Cylinders 35 and rollers 64 may be grouped into drying groups. In this case, the drying section 13 comprises several successive drying groups for carrying out the drying 39.1. The drying group can be single or double wire. In Figures 1, 3 and 5, the drying group consists of alternating drying planes 35 arranged in different planes and vacuum rollers acting as pivot rollers 64, through which the drying fabric 32 is supported to pass in an endless loop to transport and support the web W. The drying group is defined, for example, by the drying fabric circuits 22. The drying operations 39.2 carried out on a similar principle can also be carried out by the post-treatment section 14 as one or more unit processes, for example after surface gluing 48 and / or coating 49 as an associated post-drying. There, the cylinder drying can even be performed by only one drying cylinder 35, which then itself forms a drying group with its fabrics 33, which rotates in a fabric cycle 23 arranged thereon. In this case, the drying group can even be without turning rollers, as shown in Figures 3 and 5. The drying group can also be double-threaded, as shown, for example, in Figures 4 and 6 by the drying section 13. The fabric turns 22, 23 are for supporting and pulling the web W.
    [16] As shown in Figure 1, the drying section 13 of the fibrous web machine 10 may have, in addition to the cylinder drying section alone, one or more vertical and / or horizontal blow-dryers 34.3. These also have their own fabric circuits 22 with their fabrics 32. In Figure 1, the blow-drying is performed by dryers 34.3 at the beginning of the drying section 13, which is then followed by a more conventional cylinder drying with heated drying cylinders.
    35.
    20185773 prh 18 -09- 2018 [17] The drying section 13 can be followed in a manner known per se by a possible post-processing section 14. The post-treatment section 14 is shown in Figures 1, 3 to 6 either in its entirety or only partially in principle in the form of rough diagrams. The post-processing section 14 may include one or more treatments on the web track W with its equipment. Processing entities can be further divided into one or more unit processes. The post-processing part 14 can be an integral part of the machine line (online), i.e. immediately after the fibrous web machine 10, as just shown in the figures, or also its own separate sub-assembly (offline). In this case, the drying section 13 of the fibrous web machine 10 can be followed directly
    20185773 prh 18 -09- 2018, for example, a reel with which a web is formed from the web web W in at least one step before its post-processing. Of course, there may be other parts between sub-assemblies. The sequence thus indicated or the process steps and / or unit processes performed, in particular with regard to the post-processing section 14, are not intended to limit the invention in any way. The post-treatment section 14 following the drying section 13 may comprise, as process steps, i.e. various calendering, coating steps, surface gluing steps and related wetting, drying and / or profiling steps as unit processes, which are only a few examples of post-processing after roller 52 or post-treatment. The same process steps may be performed by one or more post-processing sections 14, depending on the machine in question or the product to be manufactured in each case. Some of the process steps placed in the post-treatment (e.g. one of the coating processes) may even be omitted if the final product to be manufactured does not require it (dashed lines in the course of the web W in Figure 4). Thus, the subassembly 13, 14 comprises one or more process steps 39.1, 39.2, 48, 49, 51, 53, 58 comprising drying the web track W 39.1, 39.2 and / or profiling 51, 53, 58 as one or more unit processes. It should be noted that the drying 39.2 can also be considered as profiling, especially with the finishing section 14.
    [18] The subassembly 13, 14 has several machine components 44, an example of which is shown in Figures 2 and 6. The machine components 44 act on the web track W and on the other hand, they are also affected by the web path W. Influencing here may mean, for example, controlling the passage of the web path W by the subassembly 13, 14 through the subassembly 13, 14. In addition, acting can also mean, for example, applying a thermal effect to the web web W by the machine component 44 through which it passes, for example to dry and / or profile the web web W. The machine component 44 may also be one that is directly or indirectly affected by the web path W. In this case, the heat of the web web W can be transferred to the machine component 44, whereupon it heats up. Thus, it is a matter of heat transfer. The impact can be direct. In this case, the web path W passes through a machine component 44, such as a drying cylinder 35 or a web guide roller 16. Influencing can also be indirect. In this case, the heat of the web web W is transferred to a machine component 44, such as a fabric roll guide roll 15, for example through or even through the fabric 32, 33, transmitted by the fabric 32, 33. Thus, the web path W does not necessarily need to pass even through the machine component 44 to affect it. In this case, the web web W has acted, i.e. been in contact with the fabric 32, 33 at some earlier stage of the web cycle 22, 23. Another possibility in indirect heat transfer is that there is a fabric 32, 33 between the web web W and the machine component 44. Here the heat transfer from the web web W through the web 32, 33 to the machine component 44 occurs more efficiently than in the embodiment where the web path W does not pass through the machine component 44, but only by the fabric 32, 33.
    20185773 prh 18 -09- 2018 [19] With the subassembly the web path W is exported to the process steps
    39.1, 39.2, 48, 49, 51, 53, 58 through a plurality of process devices 34, 34.1 to 34.3, 35, 48, 49, 51 ', 53, 56', 58 acting on the web web W. The process equipment acts on the web path W either directly or indirectly. The process devices may also include at least some of the machine components 44 acting on the web web W, such as drying cylinders 35. In addition, the process devices include, for example, dryers 34, which may be non-contact, such as IR, fluidized bed, rotary fluid, induction and air filters 34.1, 34.2 and humidifiers 53, 58. Of the dryers 34, Figure 3 shows, in the machine direction MD, first an infrared dryer (one-sided with respect to the web W), then two fluidized bed dryers (both sides with respect to the web W), then an infrared dryer, a rotary fluidized bed dryer, and a fluidized bed dryer. Figure 4, in turn, shows first an infrared dryer and a fluidized bed dryer and a subsequent similar second dryer arrangement, respectively. Figure 5, in turn, shows the rotary fluid dryer first and then the sequence
    20185773 prh 18 -09- 2018 kite dryer.
    [20] The pre-calendering 56, soft calendering 56 'and hard calendering 51' included in the calendering 51 can also be considered as process devices with profiling 55, 58. The stations gluing and coating 49 of the web web W on the post-processing part 14 or the machine also have preferably with profiled driers 39.2.
    [21] The conditions of the fiber web or finishing machine subassembly 10, 14, which may be, for example, operating / production conditions, may be monitored, for example in connection with condition monitoring and / or in particular to control and optimize the drying, profiling, coating and / or surface gluing process, wherein the temperature is measured at one or more points in the subassembly 13, 14. The measurement can be performed, for example, from a machine component 44 affected by the web path W, either directly or indirectly. In addition, with the method, the conditions of the subassembly 13, 14 can also be controlled and / or monitored on the basis of the performed temperature measurement 28. The control can affect the quality of the web web W to be formed and / or the operation of the machine component 44 and / or one or more process devices.
    [22] According to one embodiment, the temperature is measured by a sensor 24 arranged non-oscillatingly in a machine component 44 belonging to or adaptable to the subassembly 13, 14, for example shown in Figure 2. To this end, the machine component 44 acting on or affected by the web track W is provided with a temperature. with measuring sensing
    24. The sensor 24 comprises one or more temperature sensors 17 arranged in the machine component 44 in the cross-machine direction CD, i.e. in the longitudinal direction of the machine component 44. That is, the sensing 24 is then arranged to perform the main simultaneous measurement in the entire transverse direction CD of the machine.
    For example, compared to scanning measurements, this makes it possible to generate up-to-date temperature information from the main transverse direction CD of the whole machine, i.e. in the width direction of the web path W.
    [23] According to one embodiment, such an non-oscillating machine component 44 may be, for example, at least one rotating or rotatable machine member 41. An example of this is shown in Figure 2. At least some of the subassemblies 13, 14 of the fibrous web machine 10 have one or more. In the rotating machine member 41, the temperature measuring sensor 24 can be present, for example, in the coating 31 arranged on the jacket 31 and / or on the jacket 31 of the machine member 41.
    [24] The sensor 24 may be formed by any sensors 17 directly or indirectly measuring the temperature. The sensor 24 comprises one or more temperature sensors 17. The temperature sensors 17 may be arranged, for example, under the housing 31 and / or under the roll cover 43, i.e. the surface of the housing 31. and / or on the coating 43 and / or on the roll coating 43 arranged on the jacket 31. Typically, the sensor 24 has one or more coating layers, more generally the coating 43. Thus, the sensor 24 can be mounted on the machine member 41, for example in connection with its coating. Under or inside the coating 43, the sensing 24 is protected or can be installed between the coating layers.
    20185773 prh 18 -09- 2018 [25] However, the coating 43 may be adapted with respect to the sensing 24 to allow the best possible heat transfer from the surface 50 of the machine member 41, more generally, the machine component 44, to the sensor 17. It is preferred that the web track W or the heat of the fabric 32, 33 passing through the member 41 is transferred or the temperature is transmitted as well as possible to the sensor 24. In this case, for example, the sensor 24 is mounted closer to the outer surface 50 of the coating 43 than the outer surface of the roll shell 31. According to one embodiment, this can be realized, for example, in such a way that the installation depth of the sensor 24 from the outer surface 50 of the coating 43 is preferably 5 to 45% of the total thickness of the coating 43. This makes it possible to measure the temperature more reliably without interference from, for example, the possible poorer thermal conductivity of the coating material.
    20185773 prh 18 -09- 2018 [26] A few possible examples of sensors 17 include heat-sensitive semiconductors, resistive sensors or thermocouples. The sensor 24 may consist of, for example, a sensor strip 36 or a series of sensors formed by one or more discrete sensors 17.
    [27] The temperature sensor strip 36 may be in the machine component 44, now in the rotating machine member 41, for example in a spiral or ascending manner as shown in Fig. 2, or it may also be in a straight line in the longitudinal or circumferential direction of the machine member 41. In this case, the sensors 17 can be evenly spaced on the casing 31 of the machine member 41. Then there is a sensor-free area between them. According to one embodiment, the sensor strip 36 can even rotate the machine member 41 in such a steep spiral that the machine member 41 is rotated by the sensor strip 36 several times. The angle of rotation of the sensors 17, more generally the sensing 24, on the jacket 31 of the machine member 41 may be, for example, 180 to 320 degrees. When ascending, the sensors 17 spirally rotate the casing 31 of the machine member 41 at a distance from each other. Thus, the configuration of the temperature sensor 24 can be quite free. However, with the helical installation, the installation of the temperature sensor strip 36 is easy and has the least effect on the strength of the coating 43 of the machine member 41. However, the mounting geometry of the sensor strip 36 is not per se related to the operation of the sensor 17 or the method described in more detail later.
    [28] According to one embodiment, each sensor 17 may have its own conductor at the end of the machine member 41, or the sensors 17 may also be connected in parallel. In the embodiment shown in Figure 2, the sensors 17 belonging to the sensor strip 36 are preferably connected in series. The measurement signal of the sensors 17 is read from the sensor strip 36, for example via four conductors. In this case, no complicated cabling is required. The width of the sensor strip 36 may be a few millimeters, such as 5 mm, and the length as needed.
    [29] Temperature sensors 17 may be intelligent in themselves. A pulse can be applied to the sensors 17 from the measuring electronics 40, which passes through the entire set of sensors. As a result, each sensor 17 corresponds to its temperature or the corresponding measurement signal it generates when it receives an excitation pulse from the measurement electronics 40. In this case, the first sensor of the sensor strip 36 (mainly the measuring electronics 40) can then respond, and then, individually, each sensor 17 thereafter until all the sensors 17 have been traversed. Thus, the measurement electronics 40 can receive a measurement signal 25 corresponding to the temperature reading from each sensor 17 as a sample sequence. For example, the temperature profile 21 of the machine member 41 (Fig. 7) can be formed from the sample sequence and displayed on the display device 27 (Fig. 6) and used to control and / or monitor the conditions of the subassembly 13, 14 or even the unit process thereon. Embodiments of the method are described in more detail below.
    20185773 prh 18 -09- 2018 [30] Yet another way compared to the pulse / series connected sensor strip 36 described above is to use even smarter temperature sensors 17. In this case, each sensor 17 can have its own address, for example. In this case, the electronics 40 can always request a temperature from each sensor 17 by first identifying the sensor from which the temperature is to be obtained, its address, the sensor 17 responds to the information request and the data is transmitted via the digital bus to the measurement electronics 40. Thus, a unique address for each sensor 17 is defined. . When the position of each sensor 17 on the machine member 41 (its length, i.e. in the cross-machine direction CD) is known, a longitudinal temperature profile 21 of the machine member 41 can be formed (Fig. 7). For spiral installation
    20185773 prh 18 -09- 2018 the machine direction MD, i.e. the circumferential temperature profile of the machine member 41, can also be adhered to.
    [31] The machine element 41 may have data transmission means 20 known per se for the sensor 24 for transmitting the measurement signal 25 formed thereon to the condition monitor 38 included in the machine control automation (Fig. 6). This can be realized, for example, by a transmitter 20 enabling wireless communication arranged at the end of the machine member 41. It transmits the measurement signal 25 to a receiver 40 arranged outside the machine member 41. The receiver 40 may also have a transmission feature to divert the measurement signal 25 and / or the temperature generated by the measurement electronics. further to the machine control automation for the receiving means 46 arranged therein. The receiver 40 can also act as a transmitter in the direction of the sensing 24, as already described above, when the sensors 17 are excited to collect the measurement signal 25 therefrom. If the measurement is implemented in a static machine component 44 (Fig. 6), it is of course possible to use wired data transmission between the machine component 44 and the receiving means.
    [32] According to Figures 1, 3 to 6, the rotating machine member 41 provided with the temperature sensing 24 may be, for example, one or more guide rollers 15, 16 of the web 32, 33 and / or web web W with a drying section 13 or a finishing section 14. The machine member 41 may also have one or more drying cylinders 35 on the drying section 13 and / or the post-treatment section 14, one or more rolls of calendering 51 or surface gluing 48 or coating 49, or even a winding cylinder 45 of the winder 52, which may have, for example, a cooling water circuit. More generally, the machine member 41 may be, for example, a roll, the temperature of which is controlled, for example, by a medium, for example by cooling and / or heating, for example for drying or profiling the web track W. On the other hand, heat can also be transferred to the machine member 41 from the web W, depending on the position.
    20185773 prh 18 -09- 2018 [33] In general, a machine component 44 provided with a temperature sensing sensor 24 may be in direct or also indirect heat transfer contact with the web web W, i.e. in contact with heat transfer from the web W directly to the machine component 44 or heat from the web W to the machine component 44 . That is, the machine component 44 provided with the temperature sensing sensor 24 is acted upon directly or indirectly in the web path W. The effect involves heat transfer. The rotating machine member 41 may thus be rollers and cylinders 16, 35 in contact with the web W or, for example, rollers 15 indirectly affected by the web W, such as a guide roll 15 defining a tissue cycle, which is acted upon by the drying fabric 32, 33 or straight through. Thus, the heat is first transferred from the web W to the drying fabric 32, 33, from which it in turn is transferred to the roll 15 as the fabric 32, 33 circulates in its turn 22, 23 through the roll 15 and the temperature can be measured by the sensing 24 arranged on the roll 15. Thus, the web W does not necessarily even have to pass through the measuring roll 15 at all, but here the temperature of the fabric 32, 33 is measured, which is affected by the web W at least at some point in the process. The temperature of the fabric 32, 33 corresponds or is at least to some degree relative to the temperature W of the web. Thus, heat can also be transferred to the measuring machine component 44 through the fabric 32, 33 or also directly through the fabric 32, 33. The guide roll 15 of the fabric 32, 33 or the guide roll 16 of the web web W, for example as a grooved roll, may be one example of a machine component 44, more particularly a rotating machine member 41, within the coating 43 of which a sensing 24 may be located.
    [34] A roll or similar rotating machine member 41 is a preferred way to perform a temperature measurement 28 and also a measurement of the temperature profile 21 formed thereon, because it rotates the speed of the web web W (unlike, for example, a static beam). In addition, the rotating machine member 41 can also be grooved. In this case, the boundary layer air between the web track W and the rotating machine member 41 is minimized.
    20185773 prh 18 -09- 2018
    As a result, the heat transfer from the track W to the rotating machine member 41 is obtained as best as possible when the contact between the track W and the rotating machine member 41 is good.
    [35] Implemented by the above-mentioned technique integrated in the machine component 44, the measurement of the temperature and the temperature profile 21 formed by the temperature measurement 28 is preferably implemented. In this case, the measurement 28 can be placed in several different places by the drying and / or after-treatment section 13, 14. Sensing 24 can withstand temperatures above 125 ° C, up to 150 ° C and even above. The sensor 24 can be fabricated under virtually any rubber, PU, composite, or polymer coating. The cost of implementing the measurement arrangement for one machine component 44 is the cost of the sensing 24 and the cost of the roll coating 43. Since the cost ΡΥ 3 ΥΥ is reasonable, it is possible to install on the subassembly 13, 14 several machine components 44 performing temperature measurements 28, for example in the form of rotating machine members 41 or static beams 61.
    [36] As already mentioned earlier, the measuring arrangement does not necessarily require a rotating machine member 41, i.e. a roller or a cylinder, in which case other solutions for arranging the measurement are also possible. The machine component 44 provided with the temperature measuring sensor 24 may also be a static, i.e. stationary, non-rotating / stationary machine structure 60, as shown, for example, in Figure 6. The static machine structure 60 provided with the temperature sensing sensor 24 may be, for example, a beam 61 in contact with the web W (not required to be scanned) and / or a sliding shoe 62 arranged in contact with the web web W and / or the fabric. The measuring beam 61 is located close enough to the track W to be dried to provide essential temperature information, for example from the pocket in question.
    [37] The temperature measurement 28 and the formation of the temperature profile 21 therefrom can be performed by measuring the temperature e.g.
    20185773 prh 18 -09- 2018 at set intervals automatically. It should also be noted that, for example, the machine member 41 does not even necessarily need to rotate and still its temperature profile can be measured. Thus, in connection with the method, the machine member 41 is characterized in that it is rotatable.
    [38] Next, a method for monitoring and controlling the conditions of a fibrous web or finishing machine as an exemplary embodiment will be explained in more detail with reference to Fig. 6. Figure 6 shows a fibrous web machine 10 and an associated condition monitor 38. The conditions of the machine are monitored and controlled by one or more machine members 41 and / or beams 61 belonging to the machine and rotatable therein, for example in the casing 31 and / or beam 61 of the machine member 41 and / or beam 61. or the coating 43 has, for example, a temperature measuring sensor 24 as shown in Fig. 2.
    [39] The machine member 41 with temperature measuring sensor 24 is rotated during production. By sensing 24 arranged in the machine member 41, a measurement signal 25 is generated from the temperature of the machine member 41, to which the measurement signal 25 formed by the sensing 24 is proportional. This temperature can vary in the cross-machine direction (CD), i.e. in the longitudinal direction of the machine member 41 and the beam 61. The measurement signal 25 generated by the sensor 24 can be stored. The measurement signal 25 forms, for example, the temperature cross-section 21 of the machine element 41 or the beam 61.
    [40] According to one embodiment, the conditions of the subassembly 13, 14 are directed to one or more, for example to drying 39.1,
    39.2 and / or process step 39.1 affecting profiling,
    39.2, 48, 49, 51, 53, 58 and / or a machine component 44 belonging to a subassembly 13, 14, for example acting on the web web W, on the basis of a temperature measurement 28. Furthermore, according to another embodiment, as a control according to the invention regarding the conditions of the subassembly 13, 14,
    20185773 prh 18 -09- 2018 monitoring the condition of one or more process steps 39.1, 39.2, 48, 49, 51, 53, 58, such as drying / wetting and / or the machine component 44 belonging to the subassembly 13, 14, on the basis of the temperature measurement 28 performed. Temperature measurement or sensing 24 to form the temperature profile 21 may be integrated with, for example, drying groups and / or blow dryers 34.3 or surface gluing and / or coating stations 48, 49 and their dryers 34, 34.1, 34.2, 39.1, 39.2 and / or calendering 51 prior to them, after and / or between them. According to one embodiment, after each essential drying, profiling and / or process step 39.1, 39.2, 48, 49, 51, 53, 58, a measurement of the temperature, in particular the temperature profile 21, can be arranged. More generally, the temperature is measured by the subassembly 13, 14 at at least two points in connection with the at least one process step 39.1, 39.2, 48, 49, 51, 53, 58, preferably before and after the unit process belonging to process step 39.1, 39.2, 48, 49, 51, 53, 58. Arranging the measurement in several machine direction MD positions is made possible in part by the fact that the sensing 24 is arranged and is arranged in a machine component 44 already present in the machine / already coming into the machine, which has a primary purpose in the machine other than temperature measurement. Thus, the sensing 24, at least in a fixed position, does not necessarily require the provision of its own special machine component in the machine for temperature measurement, the fitting of which to the machine could be particularly challenging due to, for example, the narrowness of the layout.
    [41] More specifically, from the measurement data 25 'generated by one or more temperature sensors 17, more generally, from the temperature measurement 28, the web profile W and / or the machine component 44, i.e. the subassembly and thus the cross-machine CD temperature profile 21, can be formed, which is also mainly real time. The machine component 44 arranged to form the temperature cross-section 21 precisely in the cross-machine direction CD is particularly advantageous because it does not require additional components for the temperature measurement as a pre-existing component in the machine and for other primary purposes in the production environment. Thus, the temperature measurement performed by the machine component 44 and now fixed to the machine can be referred to as a secondary function of the machine component 44, which is arranged in addition to the actual function to be performed (e.g. web or fabric control, drying or coating / surface gluing). According to another embodiment, from the measurement data 25 'formed by the one or more temperature sensors 17, more generally, on the basis of the temperature measurement 28, the temperature of the coating or surface adhesive applied to the web web W and / or to the web web W is formed. These can also take the form of a cross-section measurement or, in the case of a coating and / or a surface adhesive, also an individual value measurement. The measurement of the temperature and temperature profile of the web W enables better control and adjustment of the drying of the web W and / or its after-treatment operations. This also makes it possible to monitor and control the surface gluing 48 and the coating 49. Thus, in this embodiment, the sensed rotatable machine member 41 is at least one roll of a coating or surface gluing device through which the paper web W passes therethrough through a nip formed with another roll. The coating can also be a curtain coating.
    20185773 prh 18 -09- 2018 [42] For example, their temperature and / or the temperature profile 21 formed therefrom are monitored for a continuous period of time by temperature profile sensing mounted on a rotating web 15, 16 or a drying cylinder 35 or a rotating machine member 41 of a process device. it is possible to monitor the effect of temperature on the rotating machine member 41 from these from the web W and / or from the drying and / or profiling devices 34 of the web W, such as an induction device, an air device or an infrared device. In the transverse direction CD, for example, a sensor gap of 50 mm can be used. In this case, the temperature profile 21 in the transverse direction CD can be determined accurately. On the basis of the temperature profile 21 formed in the temperature measurement 28, for example, drying 39.1, 39.2, more particularly dryers 34, can be controlled in order to achieve and ensure sufficient drying on the web web W, preferably without excessive over-drying. On the basis of this information, it is also possible to control very precisely and preferably automatically, for example, dryers 34 for surface gluing 48 and / or coating 49, such as induction, IR, air, fluidized bed, or fluidized bed dryers, which may also have a profiling effect on the web web W. with the control performed on the basis of, for example, the operation of the dryers 34 can be optimized and their energy saving can also be achieved. Using the information generated in the measurement, it is also possible, for example, for profiling, such as for controlling the humidifiers 53, to adjust the transverse CD profile of the web track W to the desired one, such as flat.
    20185773 prh 18 -09- 2018 [43] According to an embodiment, it is also possible to measure the moisture profile of the web web W at at least one point of the subassembly 13, 14. The measurement can be performed, for example, with a scanner after the drying section 13. The humidity profile obtained from this measurement can be used as the final reference of the humidity profile. In this case, based on the measured moisture profile of the web track W and one or more temperature / temperature profile measurements 28 performed at different positions of the subassembly 13, 14, the moisture level and / or profile of the web track W can be modeled at one or more points of drying 39.1, 39.2 and / or profiling 58 39.2 or even the whole subassembly 13, 14. The moisture profile measurement of the press part 12 or the temperature measuring system placed on the press part 12, if available, can also be used to specify this.
    [44] According to one embodiment, when the temperature and humidity of each point are known, the temperature and humidity information can be used to control the drying cylinders 35, dryers 34 (e.g., blast, fluid, swivel, IR and / or induction) and / or profiling devices 55. , 58 and / or the operation of the humidifiers 53 to control the drying 39.1, 39.2 and / or the profiling of the web web 58 with them, in particular the humidifiers 58. In this case, the operation of the drying means 34 can be adjusted and optimized and the humidifiers 53 The profiling possibilities located before the drying section 13 can also be included in the adjustment, for example the steam box of the press section 12.
    20185773 prh 18 -09- 2018 [45] According to another embodiment, the temperature of the web track W can also be measured at different points of the drying 39.1, 39.2 in the machine direction MD. Using this information, the curvature of the web path W can be controlled, i.e. adjusted. This can be done by controlling the drying 39.1, 39.2 of the web web W from different sides thereof. This makes it possible to adjust the drying balance of the different sides of the web web W to a more precise balance. For example, with 2-wire cycle drying sections, the curvature can be controlled by adjusting the drying ratio between the upper and lower cycle.
    [46] One embodiment of the invention is also to use it for condition monitoring, as previously mentioned. As a condition monitor, in turn, the temperature profile 21 formed by the temperature measurement 28 can be analyzed to monitor one or more things in different condition monitoring applications. For example, the operation of the humidifiers 53 can be monitored to detect, for example, clogging of their nozzles, the condition (wear) of the fabrics 32, 33, the operation of the fabricators 32, 33 to detect abnormalities, fouling of the drying cylinders 35, rollers 55 'and 56, 56' and / or the operation of the profiling devices 58 and / or the profile errors caused by the alignment errors to detect them. These are all visible by the temperature measurement 28 and in particular by the temperature profile 21 formed therefrom.
    20185773 prh 18 -09- 2018 [47] Based on the temperature measurement 28, one or more of the following properties or features can be adjusted. The dry matter content and / or moisture level of the web web W, the moisture and / or temperature profile 21 of the web web W and / or the temperature of the coating or surface adhesive can be adjusted, for example to avoid too high / low temperature. With the measurement according to the invention, the drying 39.1, 39.2 can be adjusted automatically with a conventional machine control controller in the machine and / or transverse direction MD, CD. Or more advanced, the adjustment can also be made on a model basis. The invention also makes it possible to generate alarms / perform automatic adjustment measures. These can be utilized if, for example, the drying temperature exceeds or falls below the permissible limits for the coating or surface adhesive used in each case. Of course, manual optimization of settings and their manual adjustment is still possible.
    [48] The temperature profile 21 of the web track W correlates with the humidity profile of the web track W. In this case, on the basis of, for example, the measured temperature level of the web track W and / or the temperature profile 21 formed therein, the power of one or more dryers 34, the measured humidity profile development of drainage. The humidity profile is obtained, for example, from a scanner performing humidity measurement 57, such as are usually found on at least one production line. The humidity level and also its profile are then known, for example in each drying interval in which the temperature measurement 28 is placed.
    [49] Based on the performed modeling, the dryers 34 can be controlled at each point of the drying process 39.2. Once the above things are known, the powers of the dryers 34 can be automatically adjusted to the optimum so as to obtain the desired drying result at each point in the process, a minimum amount of energy is used, it is assured that the maximum coating temperature
    20185773 prh 18 -09- 2018 laa is not exceeded, the required minimum maturation temperature of the pavement is certainly reached and the humidity of the track W is kept in the desired window. In addition, the cross-sectional CD profile of the web track W can be adjusted evenly by means of a measuring system using, for example, a profiling infra, a fluid or a humidifier 34.1,
    34.2, 53. Other actuators, such as a steam box or the profiling actuators 55, 58 of the calender 51, can in principle also be used as part of an assembly.
    [50] BigData / IOT solutions can be used for model-based control. In this case, the data is accumulated in a database and on the basis of this an optimal drying strategy is drawn up for each species, dry matter level and / or operating point of the process. The entity may also include an expert service for tuning the model and remote monitoring.
    [51] Figure 7, in turn, shows an example of the information produced by temperature measurement 28. The figure shows the temperature cross-section 21 above and the temperature trend measured below by measuring with a sensor arranged on a machine element 41.
    24. One skilled in the art will appreciate that, in reality, the shapes of the profiles 21 may vary widely. The upper graph has a horizontal position axis, i.e. the points from the jacket 31 of the machine member 41 in the cross-machine direction CD, and the subgraph has a timeline. In both directions, there is a vertical temperature axis in the Fahrenheit unit. Such information can be displayed, for example, on the display device 27 of the machine control system to the operators.
    [52] In addition to the method, the invention also relates to a system for monitoring and / or controlling conditions in a subassembly 13, 14 of a fibrous web or finishing machine 10 comprising one or more process steps 39.1, 39.2, 48, 49, 51, 53, 58 comprising drying 39.1, 39.2 and and / or profiling 51, 53, 58 as one or more unit processes. The subassembly 13, 14 has a plurality of machine components 44 which act on the web track W and / or which are directly or indirectly affected by the web path W
    20185773 prh 18 -09- 2018 indirectly. In the system, the temperature is adapted to be measured at one or more points by a temperature sensing 24 of the subassembly 13, 14. The sensing 24 is arranged in one or more of said machine components 44. The conditions of the subassembly 13, 14 are arranged to be controlled and / or monitored by one or more temperatures. The system is adapted to implement one or more sub-steps of the method described above, for example by a computer. The machine control also includes memory means 26 for storing, for example, measurements and information formed therefrom, and user interface means 27 for viewing measurements and information formed therefrom, for example.
    [53] In addition to the method and system, the invention also relates to a rotating machine member 41. It includes a jacket 31, a coating 43 mounted on the jacket 31 and a sensing 24, for example helically mounted below or inside the coating 43 and adapted to measure temperature. The machine member 41 is used in the method or system described above to monitor and / or control the conditions of the fibrous web or finishing machine 10 on the basis of a temperature measurement 28 fitted to the machine member 41.
    [54] Some other advantages of using the method and system with the finishing section 14 or machine include not only energy saving and quality improvement but also more precise control of dry matter / moisture level of web W, more accurate control of humidity and temperature of web W, overcoating of coating or surface adhesive, e.g. high / low temperature, elimination of problems due to over-drying, saving of the amount of coating and elimination of problems due to coating in the process steps following coating.
    [55] When the moisture level / profile of the web track W is uniform and optimal, the above-mentioned coating amount
    20185773 prh 18 -09- 2018 savings. In this case, it is also possible to obtain a more even coating coverage. This results in the possibility of saving on raw materials. For example, less coating or cheaper raw materials can be used. In connection with the last-mentioned advantage mentioned above, the invention also avoids situations in which the wet paste enters the dry end of the process through the post-processing section 14 due to the too low drying power. Such a situation may, for example, pose a risk of calender roll coating damage.
    [56] The invention enables online measurement of the drying section 13,
    39.1, 39.2 for temperature profiles 21 and for the temperature / temperature profile of the track W at different points through the drying section 13, 39.1,
    39.2. The invention also enables automatic adjustment and optimal drying control. The temperature profiles 21 can also be used to approximate the humidity level / profile at different points of drying. The invention can be implemented as an initial installation or also as a retrofit product for the drying section 13, 39.1, 39.2. The invention makes it possible to replace the dangerous temporary measurements used in the analysis and optimization of the drying sections 13, 39.1, 39.2. The invention can also be implemented in a temporary installation type, as described in more detail below. In this case, the temporary measurement can be installed at the desired location during downtime and the resulting production data can be used for analysis during production.
    [57] In addition to the method and system, the invention also relates to a computer program product 29 (Figure 6). The computer program product 29, which may be, for example, on suitable storage media or also downloadable over a data network or as a service product, has computer program logic 30 configured to provide various applications of the method and system described above for monitoring and controlling fibrous web or finishing machine 10 conditions, such as condition monitoring and / or production on the basis of a temperature measurement 28 performed to monitor and control the operating conditions.
    20185773 prh 18 -09- 2018 [58] The methods, systems and computer program logics 30 according to the invention can be arranged, for example, as part of machine control automation and / or condition monitoring 38. The operation according to the invention, i.e. measurement, monitoring and control, is preferably performed automatically and mainly continuously. Another added benefit is the learnability of the system.
    [59] Measurement arrangements have been described above, which are carried out, for example, in a rotating machine member 41, most typically with a sensor 24 installed under or inside the coating 43. This requires coating of an existing roll or cylinder or even a new machine member 41. replace with coated. This takes time and in some positions changing the roller or cylinder can be a laborious operation. The coating 43 also has a cost and in addition has to wait for its manufacture. It is not even possible to mount a coated roll in several positions, for example due to sculpting.
    [60] The sensor 24 can be arranged in a machine component 44, such as a rotating machine member 41, even if temporarily mounted. The advantage of the temporarily installed sensing 24 is its flexibility. Sensing 24 can be performed on a roll in the machine at standstill and measurements can then be made while the machine is running. Temporarily mounted on the surface 50 of the machine member 41, the sensor 17 senses the temperature of the web W or fabric 32, 33 passing through the surface 50 of the machine member 41 rapidly because it is on the surface 50 of the machine member 41 and does not have heat insulating coating layers 43 on it. and thus also after the start of the temporary measurement, the machine member 41 itself heats up relatively slowly. Thus, it takes its own time for its warming effect to extend to its surface 50. In this case, the heat generated / generated / generated by the machine member 41 does not have time to affect its surface 50 and thus the sensor 17 arranged therein. well web W temperature.
    [61] The sensor 24 can be mounted at a standstill, for example on a track guide roller 16, and then measurements can be taken while driving. This can be used to analyze track W temperatures, temperature profiles, adjust dryers 34, 35, 39.1, 39.2, collect data for models (e.g. DryMan) and / or also optimize the operation of other profiling equipment (such as humidifier, calender thermal rollers or profiling dryers). Measurements and analysis of results can be done as a service flexibly and cost-effectively, without waiting, for example, for roll coating or equipment installation. The solutions and applications described in the above description can be produced as a service.
    20185773 prh 18 -09- 2018 [62] Instead of the rotating machine member 41, the temporarily mounted sensing 24 can also be implemented with a temporarily mounted beam with a temperature sensor strip 36. The beam is pushed into the desired position on the machine with the track W or the fabric 32, 33. W then has a heat transfer effect. In this way, the temperature profile of the track W, for example, can also be flexibly measured with mobile equipment.
    [63] In addition to the drying section 13 or the finishing section 14, a temporary measurement can also be made at the wet end of the fibrous web machine with a guide roll of a fabric, such as a wire or a press felt.
    [64] Figure 8 shows an example of the temporary sensing of the machine component 44 with the temperature sensors 17 in cross section. Even in a temporary installation, the sensor 24 can be mounted, for example, on the track guide roller 16 again in a spiral on its surface 50 for temporary measurement. In this case, it lasts best and, in addition, interference with the path of the track W is minimal. The sensor strip 36 may be, for example, a 5 mm wide polyimide strip. It has sensor components 17 at desired intervals, for example at 50 mm intervals. This provides a high-resolution temperature profile measurement for analyzes. If the height of the sensor component 17 so requires, a compensating tape 59 'can be installed around it. It evens out the environment of the sensor component 17 so that the component 17 does not puncture or mark the path W passing through the roll 16. A protective tape 63 can also be applied over the entire sensor 24. It can be, for example, Teflon or metal tape. More generally, the sensor 24 is arranged on the surface 50 of the machine member 41 and, in connection with the temperature sensors 17 belonging to the sensor 24, now surrounded by a material layer wider than the temperature sensor 17 and leveling the surface 50 of the machine member 41, more generally, the filling 59 to smooth the surface 50, i.e. to generate a lower surface pressure at the temperature sensors 17, at an object in contact with the machine member 41, such as a web web W.
    20185773 prh 18 -09- 2018 [65] Fig. 9 shows another example of, for example, the sensing of the machine component 44 shown in Fig. 2 with temperature sensors 17 in cross section. Beneath the sensor 24 are one or more layers 18 which at least to some extent thermally insulate the sensor 24 from the roll shell 31. In this case, the heat generated by / introduced into the roll cannot affect the temperature measurement performed thereon 28. The sensor 24 is on top of one or more layers 19 which conducts heat as well as possible. In this case, the heat is efficiently transferred from the track W to the sensors 17. If the coating 43 is, for example, of monolithic materials, then the layer 19 on the sensor 17 is thinner than the underlying layer 18 on the surface 31 of the machine member 41. the resolution and speed are optimized and the profile of the track W is measured and the roll does not evenly even out the transverse result. More generally, a layer 18 is arranged below the sensing 24 adapted to measure the temperature to thermally insulate the sensing 24 from the housing 31 of the rotating machine member 41. In addition, a layer 19 is arranged on the sensing 24 to conduct heat to the sensing 24 from the surface 50 of the machine member 41.
    [66] Measurement 28 of the temperature / temperature profile 21 according to the invention is possible according to another embodiment
    20185773 prh 18 -09- 2018 utilizes calender area profiling for condition monitoring and optimization. The temperature / temperature profile 21 is crucial for the outcome of the calendering 51.
    [67] In a calender application, referring to Figure 5, according to one embodiment, the exact temperature profile 21 of the track W is measured before the calender 51 ', after the calender 51' and, if necessary, also between the calender nips. The measurement can be made, for example, with track guide rollers 16. The sensing 24 for measuring the temperature profile 21 can also be carried out under the polymer coatings of the calender rolls. This provides an accurate picture of the temperatures and temperature profiles 21 in the area of the calender 51, both the calender 51 itself and the paper / board passing through the calender 51, more generally, the web W. In this application, too, the measurement can be performed on the installed base without repairs and mechanical changes. Sensing 24 can be done, for example, in connection with roll coatings.
    [68] An accurate temperature profile measurement tells the changes in the temperature profile 21 of the track W relative to the normal state if, for example, the actuators have problems or are otherwise suboptimal (inaccurate adjustment or incorrect operation). Some examples of calender profiling devices include induction / air profiling devices, steam boxes, humidifiers 58, thermal rollers 55 / zone rolls.
    [69] The cool / hot areas in the transverse direction of the track CD indicate, for example, problems with the induction profiling device or the steam box. Comparing the previous and subsequent temperature profile 21 of the calender 51, the effect of the calender 51 and its actuators on the temperature profile 21 can be seen, thus distinguishing between the phenomenon coming from the calender 51 and the incoming path W. As a result, the measures can be better targeted. By looking at the difference in temperatures / profiles between the nips of the calender 51, it is possible to further analyze where the total
    20185773 prh 18 -09- 2018 process, possible error situations occur, especially in the multi-nip calender 51 'or when several soft calenders 56' are used online (Figures 4 and 5).
    [70] The measurement of the temperature profile 21 of the calender rolls / track W can also be used, for example, for the condition monitoring of the profiling actuators of the calenders 51, possibly together with other profile measurements. A model can be developed for the operation of these, which reports deviations from normal on the basis of several measurements. The properties of the incoming track W are included in the model because the temperature is known before and after the temperature measurements of the calender 51.
    [71] In addition to condition monitoring, the temperature measurement 28 can be used, for example, for feedback control as a single measurement variable, for example in multivariate control, for profiling the calender 51. The inputs can then be, for example, a hardness profile, a thickness profile, a gloss and a temperature profile. The outputs, in turn, can be, for example, zone rollers, induction profiling, a steam box and other possible quantities. Thus, in addition to condition monitoring, the invention also allows control of the calendering process.
    [72] The temperature measurement 28 in the manner according to the invention can also be part of the MD control of the calender 51, in particular with offline calenders. In them, the temperatures of the thermal roll 55 must be carefully optimized during accelerations and braking.
    [73] In the context of the invention, a fibrous web machine 10 means a paper, board and tissue machine as well as a pulp drying machine.
    [74] It is to be understood that the foregoing description and the accompanying drawings are intended only to illustrate the present invention. Thus, the invention is not limited to the embodiments set forth above or defined in the claims, but many different variations and modifications of the invention will be apparent to those skilled in the art which are possible within the scope of the inventive idea defined by the appended claims.
    权利要求:
    Claims (26)
    [1]
    A method for monitoring and / or controlling conditions in a fibrous web or finishing machine subassembly comprising one or more process steps (39.1, 39.2, 48, 49, 51, 53, 58) comprising drying (39.1, 39.2) and / or profiling (51, 53, 58) as one or more unit processes and in which the subassembly (13, 14) has several machine components (44) which act on the web (W) and / or which are directly or indirectly affected by the web (W), characterized in that in the method
    - measuring the temperature at one or more points in the subassembly (13, 14),
    - controlling and / or monitoring the conditions of the subassembly (13, 14) on the basis of said one or more temperature measurements (28).
    [2]
    Method according to Claim 1, characterized in that
    - controlling, as conditions of the subassembly (13, 14), one or more process steps (39.1, 39.2, 48, 49, 51, 53, 58) and / or a machine component (44) belonging to the subassembly (13, 14) for said one or more temperature measurements (28) and / or
    - as said control over the conditions of the subassembly (13, 14), the condition monitoring of said one or more process steps (39.1, 39.2, 48, 49, 51, 53, 58) and / or the machine component (44) belonging to the subassembly (13, 14) is performed on the basis of a temperature measurement (28).
    [3]
    Method according to Claim 1 or 2, characterized in that the temperature is measured non-oscillatingly by means of a sensor (24) arranged in a machine component (44) belonging to the subassembly (13, 14).
    20185773 prh 18 -09- 2018
    [4]
    Method according to claim 3, characterized in that the temperature is measured by a sensor (24) comprising one or more temperature sensors (17) arranged in the machine component (44) in the cross-machine direction (CD).
    [5]
    Method according to one of Claims 1 to 4, characterized in that at least one of the following is formed on the basis of the temperature measurement (28):
    - the main real-time and cross-machine direction (CD) temperature profile (21) of the web (W) and / or the machine component (44), the temperature of the web (W) and / or the coating or surface adhesive applied to the web (W).
    [6]
    Method according to one of Claims 3 to 5, characterized in that the machine component (44) provided with the temperature-sensing sensor (24) is acted upon directly or indirectly by the web path (W), the actuation of which involves heat transfer.
    [7]
    Method according to one of Claims 3 to 6, characterized in that the machine component (44) provided with a temperature-sensing sensor (24) is at least one of the following:
    - a rotating machine member (41), wherein the temperature measuring sensor (24) is in a coating (43) arranged on the jacket (31) of the machine member (41) and / or on the jacket (31),
    - static machine structure (60).
    [8]
    Method according to Claim 7, characterized in that the rotating machine element (41) provided with a temperature-sensing sensor (24) is one or more of the following:
    - guide roll (15, 16) of fabric (32, 33) and / or web (W),
    - drying cylinder (35),
    - surface gluing (48) or coating (49) roll,
    - a roll (55) of a calender (51, 56, 56 ').
    [9]
    Method according to Claim 7 or 8, characterized in that the static machine structure (60) provided with the temperature-sensing sensor (24) is a beam (61) and / or a sliding shoe (62) arranged in contact with the web (W) and / or the fabric. with.
    [10]
    Method according to one of Claims 1 to 9, characterized in that the temperature is measured by the subassembly (13, 14) at at least two points in at least one process step (39.1).
    39.2, 48, 49, 51, 53, 58) preferably before and after the unit process belonging to the process step (39.1, 39.2, 48, 49, 51, 53, 58).
    20185773 prh 18 -09- 2018
    [11]
    Method according to one of Claims 5 to 10, characterized in that, on the basis of the temperature profile (21) formed in the temperature measurement (28),
    - drying (39.1, 39.2) in order to achieve sufficient drying on the web (W), preferably without excessive over-drying, and / or
    - profiling (58), such as dryers (34) and / or humidifiers (53) for adjusting the transverse (CD) profile of the web (W).
    [12]
    Method according to one of Claims 1 to 11, characterized in that
    - measuring the moisture profile of the web (W) at at least one point of the subassembly (13, 14),
    - based on the measured moisture profile of the web (W) and one or more temperature / temperature profile measurements (28), the moisture level and / or profile of the web (W) is modeled at one or more points of drying (39.1, 39.2) and / or profiling (58) through the subassembly (13, 14).
    [13]
    Method according to one of Claims 1 to 12, characterized in that on the basis of a temperature measurement (28)
    20185773 prh 18 -09- 2018 the operation of the drying cylinders (35), dryers (34), profiling devices (55, 58) and / or humidifiers (53) is controlled to control the drying (39.1, 39.2) and / or the profiling of the web (W) performed thereon ( 58).
    [14]
    Method according to one of Claims 5 to 13, characterized in that
    - measuring the temperature of the web (W) at different points of drying (39.1, 39.2),
    - controlling the curvature of the web (W) by controlling the drying (39.1, 39.2) of the web (W) from different sides thereof.
    [15]
    Method according to one of Claims 1 to 14, characterized in that the post-treatment section (14) or machine comprises one or more of the following:
    - coating (49) with drying (39.2),
    - surface gluing (48) with drying (39.2),
    - the calendering (51) with its profiling (55, 58) and the control and / or monitoring performed by the method are related to one or more of these.
    [16]
    Method according to one of Claims 5 to 15, characterized in that the temperature profile (21) formed by the temperature measurement (28) is analyzed as a condition monitor in order to monitor one or more of the following:
    - operation of humidifiers (53),
    - condition of tissues (32, 33),
    - operation of tissue washers (54) (32, 33),
    - contamination of the drying cylinders (35),
    - operation of the rollers (55) and / or profiling devices (58) of the calender (51 ', 56, 56') and / or
    - profile errors due to alignment errors.
    [17]
    Method according to one of Claims 1 to 16, characterized in that one or more of the following are adjusted on the basis of the temperature measurement (28):
    20185773 prh 18 -09- 2018
    - dry matter content and / or moisture level of the web (W),
    - humidity and / or temperature profile of the web (W) (21),
    - the temperature of the coating or surface adhesive to avoid too high / low temperatures.
    [18]
    Method according to one of Claims 1 to 17, characterized in that
    - modeling the drying process (39.2) on the basis of the measured temperature of the web (W) and / or the temperature profile (21) formed therefrom, the power of one or more dryers (34), the measured moisture profile of the web (W) and the nature of the species run on said web (W) to determine in the direction of travel of the web (W),
    - on the basis of the modeling performed, the dryers (34) are controlled at each point of the drying process (39.2).
    [19]
    Method according to one of Claims 1 to 18, characterized in that the machine component (44) through which the web path (W) passes acts on the web path (W).
    [20]
    Method according to one of Claims 3 to 19, characterized in that the sensing (24) is arranged on the surface (50) of the machine component (44) for temporary measurement.
    [21]
    21. A system for monitoring and / or controlling conditions in a subset of a fibrous web or finishing machine comprising one or more process steps (39.1, 39.2, 48, 49, 51, 53, 58) comprising drying (39.1, 39.2) and / or profiling (51, 53, 58) as one or more unit processes and in which the subassembly (13, 14) has several machine components (44) which act on the web (W) and / or which are directly or indirectly affected by the web (W), characterized in that in the system
    - the temperature is adapted to be measured in one or more
    20185773 prh 18 -09- 2018 the mass encounters the subassembly (13, 14) with a temperature measuring sensor (24) adapted to one or more of said machine components (44), the conditions of the subassembly (13, 14) are adapted to be controlled and / or monitored on the basis of said one or more temperature measurements (28) by the processor means (47).
    [22]
    A system according to claim 21, characterized in that the system is adapted to implement the sub-steps of the method according to one or more of claims 2 to 20.
    [23]
    23. A rotating machine member comprising
    - a jacket (31), a coating (43) arranged on the jacket (31) and a temperature sensor (24) mounted below or inside the coating (43), characterized in that the machine member (41) is used in the method according to claim 1 or in a system for monitoring and / or controlling the conditions of a fibrous web or finishing machine (10).
    [24]
    Machine element according to Claim 23, characterized in that the temperature sensor (24)
    - a layer (18) is arranged below to thermally insulate the sensor (24) from the casing (31) of the rotating machine member (41),
    - a layer (19) is arranged on it, which is adapted to conduct heat to the sensor (24) from the surface (50) of the machine member (41).
    [25]
    Machine element according to Claim 23 or 24, characterized in that the sensor (24) is arranged on the surface (50) of the machine element (41) and a temperature sensor (17) is arranged in connection with the temperature sensors (17) belonging to the sensor (24). 17) a wider filler (59) for leveling the surface (50) of the machine member (41) at the temperature sensors (17).
    [26]
    A computer program product having computer program logic (30) configured to provide a method according to one or more of claims 1 to 20 for monitoring and controlling the conditions of a fibrous web or finishing machine (10).
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    同族专利:
    公开号 | 公开日
    FI128944B|2021-03-31|
    AT521578B1|2021-03-15|
    AT521578A3|2020-05-15|
    AT521578A2|2020-03-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FI80100C|1986-12-18|1990-04-10|Valmet Oy|FOERFARANDE VID STYRNING OCH / ELLER OEVERVAKNING AV EN BELAEGGNINGSPROCESS AV EN BANA.|
    FI81627C|1988-02-02|1990-11-12|Valmet Paper Machinery Inc|FOERFARANDE VID REGLERING, STYRNING OCH / ELLER KONTROLL AV TORKNINGEN AV EN BELAGD BANA.|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    FI20185727|2018-08-30|DE102019123270.8A| DE102019123270A1|2018-08-30|2019-08-30|Method, system and computer program product for monitoring and / or controlling conditions in the section of a fiber web or equipment machine|
    ATA50752/2019A| AT521578B1|2018-08-30|2019-08-30|PROCESS, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR MONITORING AND / OR CONTROLLING CONDITIONS IN THE SUB-SECTION OF A FIBERWAY OR EQUIPMENT MACHINE|
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