• 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 is intended to heat treat and / or dry the web of material as it moves, and may be. used in light industry. The purpose of the invention is to reduce energy consumption. The material web 1 is treated on one or both sides with infrared radiation. The infrared emitting panels 6 can be controlled by the radiation power over the width of the web of material 1 by the fact that they are heated by a large number of individual streams of hot gas directed parallel to the web of material 1, which are regulated
    公开号:SU1729302A3
    申请号:SU894613852
    申请日:1989-04-06
    公开日:1992-04-23
    发明作者:Фон Квиатковски Курт；Гориссен Эрих；Унгер Удо
    申请人:Фитс Машиненбау Гмбх (Фирма)；
    IPC主号:
    专利说明:

    at different temperatures or can flow at different flow rates through compartments 8, 9 of infrared emitting panels 6. The compartments 8, 9 of hot gas are made of
    thermally conductive material and thermally connected to the front walls 7 of the radiating panels 6 and / or the rear walls 10, 11.6 Cp. f-ly, 9 ill.
    The invention relates to a device for the heat treatment and / or drying of a web of material.
    Drying of the material webs can be carried out with a continuous air dryer. A characteristic feature of this dryer is that large amounts of air flow into the web of material and circulate in the drying chamber. In order for air to not adversely affect the quality of the web of material, it must be completely free of even the smallest foreign particles. Although this type of drying and provides high performance, but due to the large volumes of air devices that process these volumes cleaning devices, blowers, etc. must be energy intensive.
    There are known methods and devices in which the heat load of a material web, necessary for heat treatment and / or drying, is emitted by the radiation of infrared emitters.
    A device is known in which infrared emitters consist of radiation panels heated directly by gas-fired burners, the infrared radiation of which is aligned by means of meshes arranged between them and the webs of material 1.
    A device is known, the infrared emitters of which consist of panels carrying on their sides facing the material web, pipelines laid in the form of serpentine, for example, for hot oil used as a heat carrier. In order to be able to influence the web of material across its width with different radiation power, the pipelines laid in the form of a meander are arranged parallel to each other and in the direction of movement of the web of material 2.
    However, this device, designed for heating with hot oil, requires large preparatory and technical costs. Especially sensitive temperature control with the help of pipelines laid in the form of a meander, with which the hot oil flowing as a heat carrier flows, cannot be reached.
    Infrared emitters for drying ovens are known, the radiation body of which is heated by hot gases directed through its back side. AT
    In this case, a chamber is provided over the entire u width of the radiation body for directing hot gases 3.
    In order to create different radiation power at a different heat flow rate through the radiation surface, they affect the flow rate of hot gases through the channels laid in the radiation body through different cross sections. However, then, due to the established
    cross sections, it is impossible to change the thermal radiation of individual surfaces of the radiation body during operation.
    Closest to the present invention is a device for heat treatment.
    and / or drying a long material web, comprising a guide and transport, material transport means disposed on one or both of its sides, and hollow infrared emitting panels arranged parallel to each other on at least one of the two sides of the material web to form with the last intermediate channels and partitioned each into compartments for the passage of hot air, as well as heating and / or cooling devices placed at the rear walls of the panels 4.
    A disadvantage of the known device is high energy consumption when using it.
    The purpose of the invention is to reduce energy consumption.
    To match the radiation power.
    with an appropriate width of the material to be processed, the channels are designed as hot air ducts, with a large number of such ducts running in parallel
    each other and in the direction of passage of the web of material and provided with control means by which it is possible to regulate the flow rate and / or the temperature of the hot air in the individual ducts
    hot air, and / or heating or cooling devices placed on the backs of the air ducts,
    heat production (or cooling capacity).
    The heating of infrared emitters is not carried out by directly supplying combustible gases to the panels or highly heated hot oil used as a heat carrier, but by means of hot air. Due to the separation of hot air into a large number of parallel streams, it is possible to adjust the different required temperature across the width of the material web, so that the material web undergoes a uniform width across heat treatment (drying).
    With the help of heating and cooling elements located on the back side, the radiation power of the infrared emitters can be adjusted not only in width but also in length.
    The refusal of hot oil, used as a heat carrier, is due to the fact that even a small amount of oil protruding from the smallest pores can pollute the air in the dryer to such an extent that the web of material to be dried is covered with at least a monomolecular layer of oil. This property of high-boiling hydrocarbons leads to the fact that the surface of the web of material that passes drying in an atmosphere containing oil vapors is not firmly glued to other fabrics, such as copper foil, since the surface coating with hydrocarbon molecules acts as a separating layer.
    Since the material web during heat treatment and / or drying gives off volatile substances, these substances must be removed. For this purpose, the gas flow is directed through the intermediate space between the material web and the infrared emitter parallel to the material web, in particular fresh air, which is then supplied to the outlet as exhaust air. If, when volatile substances are released, it is a question of regenerable solvents, then an inert gas or a mixture of inert gas with oxygen must be used for removal, which must have such a low oxygen content so as to reliably prevent an explosion when mixed with combustible solvents.
    Separately adjustable valves are provided at the inlets and / or outlets of the gas pipelines for controlling the radiation power of gas pipelines of gas which are located next to each other. Hot gas pipelines may be provided with heating or cooling devices in front of and / or behind the inlets, with which hot gases may be heated and / or cooled.
    Additional heating of hot gases can be carried out by means of heating devices, in particular, infrared emitters, burners or heat exchangers acting on the rear walls of the hot air gas pipelines.
    Gas cooling can be carried out by supplying cooling air to the rear walls or heat exchangers.
    The radiation panels forming the front wall as well as the rear wall of the pipeline are made whole or made of finely meshed mesh and / or glass. If the front wall is solid, partitions (ribs) of heat-conducting material may be provided that extend in the longitudinal direction through the gas pipeline (hot gas pipelines) and are thermally connected to the front wall. This improves the transfer of heat from hot gases to the radiating front wall. The transfer of heat to the radiating front wall is particularly effective if the partitions have a conical cross-section, the wider base of which is connected to the front wall. In special cases, the rear wall of the hot gas pipelines is itself heat-conducting and heat-conductingly connected with partitions. In this case, the hot gas streams can be further heated by heating the back wall. This heat-conducting form is also effective when using a cooling device.
    The device has a furnace chamber or heat exchanger. The gas duct (hot air ducts) is preferably in the same hot gas circuit with a combustion chamber (heat exchanger). The combustion chamber (heat exchanger) can be used to heat gases introduced into the intermediate space for the removal of volatile substances, which is possible due to the fact that from the exit of the combustion chamber (heat exchanger) to the entrance of the intermediate space between the infrared radiators and the web of material forming the channel branch. The entrance of this intermediate space forming the channel can be connected to the chamber where gases flowing through it are heated with harmful substances or heated or cooled by a burner or heat exchanger.
    In order to stabilize the passage of the material web in the intermediate section of the netve, nozzles are provided in the latter, which blow the material web.
    Using the proposed device, the material web can be optimally subjected to heat treatment and / or drying. In certain cases, a gas is passed through the intermediate space between the infrared emitters and the material web, which is heated or cooled in a separate heat exchanger and is supplied by a separate blower in case special requirements are made to the purity, temperature and gas composition. By means of a separately adjustable blower, the gas flow can be especially carefully dispensed. Due to this, for example, vibrations and the beating of thin material webs (so-called sailing effect) are prevented.
    By using waste gases from combustion processes, inert air or inert gas as the purge medium, the danger of an explosion is reduced, and with many solvents, depending on the position of the explosion area, is even prevented.
    Solvents can be safely discharged together with inert gases in a separate circulation circuit, since the circulation loop of the purge air is completely separated from the circulation loop of the hot gas. Only at the entrance and exit of the material web in the treatment space do you need so-called buffer zones, in which, due to certain devices, the purge gas and outside air are prevented from moving.
    In some cases, it is advisable that the fabric of the material for heat treatment and / or drying be exposed to infrared rays of high excitation energy emitted by the radiation panels emitting red-hot light. For this purpose, heating devices, such as gas-heated infrared emitters, are used. At the same time, between the light red radiation surface of the infrared emitter radiation panels having temperatures above the flash point of the solvent, and the material web intermediately include two streams of hot gas regulated with a certain accuracy: the gas flow between the material web and the discharge panel and the heat flux. gas in hot gas pipelines. If, for example, the front and rear restrictions of the hot gas pipelines are made of a grid, for example of metallic fabric, then by adjusting the individual hot gas flows in parallel hot gas pipelines, the temperature profile can be precisely controlled in width and the maximum temperatures (superheating) can be equalized. in the direction of passage of the web material. Exhaust or inert gas is directed into the space between the material web and the radiation panel made of a grid. By adjusting the flow ratios in the space between the material web and the grid-like radiation panel and in the gas ducts of hot gas, large amounts of solvent can be prevented from penetrating through the grid forming the radiation panel, as well as the rear mesh wall into the high-temperature surfaces. Uncontrolled direct ignition through mesh-like panels (walls) can be prevented by choosing a grid so finely cellular that the damping distance is as small as possible (the principle of a mine lamp).
    For many materials, after heat treatment and / or drying at high temperatures, the so-called languor zone closes at a slightly lower temperature. This is due to the fact that the gas flow between the material web and the infrared emitters is introduced cooled. In order to avoid possible condensation processes on the surfaces of the material web, it is advisable to process the material web with very long wavelength infrared radiation with the further passage of the material web between the infrared emitters.
    Figure 1 shows a heat treatment apparatus, longitudinal section; figure 2 - section aa in figure 1; on fig.Z - section BB in figure 1; Figures 4 and 5, variants of the device for heat treatment, longitudinal section; 6 is a multi-part device, longitudinal section; 7 - infrared emitter, cross section; on Fig and 9 - the same options.
    A device for heat treatment of a web of material 1 has guiding and conveying means for a web of material 1 (one upper guide roller 2 is shown), a housing 3 with an inlet 4 and an outlet 5 slots for a web of material 1 and placed in the housing 3 on both sides of the material 1 infrared emitting panel 6.
    The infrared emitting panels 6 are arranged longitudinally in the direction of the web of material 1 and at a distance from it. Each infrared radiating panel has a radiating front wall 7 made of metal, metal with a specially treated surface, special glass or a finely meshed mesh. Radiating panels b have a large number of compartments 8, 9. for a hot gas arranged parallel to each other and longitudinally relative to the direction of the web of material 1. The rear walls 10 and 11 of the compartments 8 and 9 of hot gas can be insulating or well depending on the purpose. conductive heat or glass or finely meshed mesh. The partitions 12 and 13, which (FIG. 2) separate the hot gas compartments 8 and 9 from each other, are preferably made of heat-conducting material and are heat-conductingly connected to the front walls 7 of the radiating panels 6 and / or the rear walls 10 and 11, thanks to this the heat transfer from the medium flowing through the hot gas compartments 8 and 9 and from the heated back walls 10 and 11 through the medium to the radiating panels b and directly through the partitions 12 and 13 is improved.
    The rear wall 10c of the end wall 14 of the housing 3 and the side walls 15 and 16 located in the housing 3 forms a chamber 17 into which fresh air is directed through the inlet 18 and the exhaust air is exhausted through the outlet 19. The atmosphere of the chamber 17 can be heated by the heat exchanger 20, the hot gases of which with the help of blowers 21 and 22 are directed through the distribution chamber 23 to the hot air compartments 8 and through the channels 24, 25 and the distribution air chamber 26 to the hot air compartments 8 and 9.
    After passing through compartments 8 and 9, the hot gases through the collecting chambers 27.28 and the gas lines 29 (not shown) are sent back to the chamber 17.
    For removal of substances that have become volatile when drying in the intermediate channels 30 and 3.1 between the web of material 1 and the radiating panels 6, the heated fresh air is blown through the heat exchanger 33 into the distribution chambers 34 through a blower through the fresh air inlet 32. which, then, the hot gases through the distribution screen filters 35 enter the intermediate channels 30 and 31, These hot gases capture the volatile substances and discharge them through the exhaust air outlet 36.
    Both at the inlets of compartments 8 and 9 of hot gas, and at their exits (Figs. 3 and 4), control devices are provided - dampers 37-40, by means of which the compartments 8 of hot gas can be fully or partially closed. Corresponding control devices - valves 41-44 are also provided for hot gas compartments 9. With the help of valves 41-44 and dampers 37-40, it is possible to control the volume of gases per unit of time, as well as the velocity of hot gases passing through compartments 8 and 9 and the power
    0 radiation of infrared emitting panels 6 along their width.
    If control devices are not provided, the temperature of the hot gases and, consequently, the intensity of the radiation of the infrared emitting panels 6 along their width can be controlled taking into account the fact that the hot gases are heated to varying degrees of width from the rear wall 10 of the compartments 8 and 9 hot gas It is possible
    For example, by means of a separate 10 heaters heating the back wall, which are put into operation singly or in groups. These burners can also serve for additional heating if they are displaced in the direction of movement of the web of material 1. Instead of the heat exchanger 18, a pre-mixing burner 45 (FIG. 4) can be provided, with which the oxygen content can be controlled
    0 in circulating hot gases in a wide range. In this case, the collecting chambers 27 and 28 are connected to the combustion chamber 17 through a control valve 46, by means of which, as well as by means of ratios
    5, the pressure at the inlet 18 and outlet 19 of the orifices can regulate the ratio of the circulating air to the exhaust air, which is important when the dryer is operated in order to enrich and regenerate solvents with inert air or gas.
    Distribution chambers 34 can be connected to distribution chambers 23 and 26 through adjustable dampers 47 (Fig. 5). Holes 48 are provided in the front walls 7 of the infrared emitting panels 6, from which hot air jets are directed obliquely to the web of material 1 These jets
    The 0 is equalized and guided by nozzles (not shown) that can operate known. by forced ventilation.
    Zones of vertical drying for linen
    5 of material 1 (Fig. 6) is formed by one branch of the web of material 1, directed upwards, and one branch of the web of material 1, directed downwards in order to carry out an optimal heat treatment and / or drying of the web of material 1.
    In zones I and II (FIG. 6), the circulating medium is heated by the burner 45. In zone I, intermediate channels 30 and 31 are supplied through the inlet 32. Fresh air and heat exchanger 33 are completely separated from the circulating gaseous medium, in particular hot air. In zone II, suction from these intermediate channels 30 and 31 of zone I of hot air, saturated with volatile substances, and by introducing air, in particular hot, into intermediate channels 30 and 31 of zone II, flows in zones I and II are separated. This separation is removed. When coordinating the flow of zones I and II, respectively, entered through the inlet 32 and output through the outlet 36.
    In zone III, by suction of exhaust air through an exhaust port 49 and intake of air into the equalization chambers 50 and 51 from the direction change zone 52, streamline zone I is separated from the direction change zone 52. In the latter, the web of material 1 is guided through guide rollers 2.
    The infrared emitting panels 6 for heat treatment and / or drying of the material web 1 put into operation in Zone II differ from the infrared radiators 53 and 54 heated exclusively by the hot gases passing through the gas pipelines, since the rear walls 10 and 11 of the compartments 8 and 9 are additionally heated energy-rich infrared radiation, which is produced, for example, by infrared radiators 53, 54 heated by a gas. If the front 7 and rear 10, 11 walls of the infrared emitting panels 6 are made of thermally conductive material and thermally connected through thermally conductive partitions 12 and 13, it is possible to maintain uniformly high temperature of the radiator in the direction of the material 1 along the entire length of the infrared emitting panels 6. the rear 10.11 walls are made of infrared permeable glass or finely meshed nets, the majority of the energy-rich infrared radiation of infrared emitters 53 and 54 flushes directly on the material web 1 and acts on it. By adjusting the flow ratios in the compartments 8 and 9 of the hot gas in conjunction with the infrared radiators 53 and 54 heated by the gas, it is possible to realize a very precise distribution of the radiation and temperature across the width and length of the web of material 1.
    Zone IV is used as a cooling zone. In the gas lines of the hot gas of the infrared emitting panels 6, cold gas is blown in, which on its way in or against the direction of movement of the web of material 1 is heated. Through cooling nozzles 55 and 56, attached to the heat-conducting rear walls 10 and 11 of infrared emitting
    0 panels 6, gas. The flow in the compartments 8 and 9 from the rear side is cooled again, so that the cooling effect in the direction of movement of the web of material 1 can be adjusted. To support this effect
    5, if necessary, the cooled gas is also directed to the intermediate channels 30 and 31, which withdraws the further released volatile substances and prevents their condensation on the web
    0 material 1.
    The front wall 7 of the radiating panel 6 (FIGS. 7-9) radiates heat through the intermediate channels 30 and 31 to the web of material 1. In compartments 8 and 9 it flows
    5 regulated hot or cold air. On the rear side are the rear walls 10 and 11.
    Partitions 12 and 13 (Fig. 7) are made conic when manufactured by casting. The rear walls 10 and 11 may be made of an insulating or thermally conductive material with additional heating or cooling from the rear. Partitions 12 and 13 can be manufactured
    5 of sheet material (Fig.8). However, contact and, consequently, heat transfer between partitions 12 and 13, front 7 and rear 10 and 11 walls is worse than with a cast structure.
    0 With a welded structure (Fig. 9) possible homogeneous values of radiation in the event that partitions 12 and 13 are heat-conductingly welded to the radiating panel 6.
    权利要求:
    Claims (7)
    [1]
    5 claims
    1, A device for heat treatment and / or drying of a web of lengthy material, comprising guide and vehicle for moving
    0 material located on one or on both sides of it, and hollow infrared emitting panels arranged parallel to one another on at least one of the two sides of the web of material with
    5 formation of intermediate channels with the latter and divided by partitions each into compartments for the passage of hot air, as well as heating and / or cooling devices located at the rear walls of the panels, the partitions being made of heat conductive material and heat conductively connected to the front and rear walls of the panels, that, in order to reduce energy costs, the compartments of the panels are arranged longitudinally relative to the movement of the material and each is equipped with devices for controlling the speed and / or temperature of the sweat hot air, and heating and / or cooling devices are adjustable for cold or heat output.
    [2]
    2. The device according to claim 1, wherein the devices for regulating the speed and / or temperature of the air flow are made in the form of controllable valves installed at the inlet and outlet ends of the compartments.
    [3]
    3. The device according to paragraphs. 1 and 2, from the point of view of the fact that the heat exchange devices are made in the form of infrared radiation
    five
    lei or burners, or blowing nozzles, or coils.
    [4]
    4. Device on PP. 1-3, characterized in that the front and rear walls of the panels are made in the form of finely cellular steel, ceramic or glass mesh.
    [5]
    5. The device according to claims 1-4, characterized by the fact that the partitions between the walls of the panels are made in cross-section with conical, adjacent a wide base to the front wall of the panel.
    [6]
    6. The device according to ППИ-5, I distinguish that the compartments of the panels are additionally connected to the combustion chamber or the heat exchanger.
    [7]
    7. Device pop p. 1-6, differing from the fact that the intermediate channel at the 20th inlet is connected to the combustion chamber or heat exchanger.
    2.
    5
    12,138,9 Ш1
    8.9 Yu-Fig 8, 30.31. one
    8.9 Ш1
    8.9 Yu-Fig 8, 30.31. one
    类似技术:
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    US4065251A|1977-12-27|Furnaces
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    US2129634A|1938-09-13|Oven construction
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    同族专利:
    公开号 | 公开日
    EP0336120A3|1991-06-05|
    FI891654A|1989-10-08|
    DE3811620A1|1989-10-26|
    US4952145A|1990-08-28|
    BR8901641A|1989-11-21|
    DD283677A5|1990-10-17|
    JPH0278887A|1990-03-19|
    FI891654A0|1989-04-06|
    DE8817120U1|1993-02-04|
    EP0336120A2|1989-10-11|
    IN171397B|1992-10-03|
    DE3811620C2|1992-05-07|
    CN1037581A|1989-11-29|
    KR890016692A|1989-11-29|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3811620A|DE3811620C2|1988-04-07|1988-04-07|
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