• 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 device for carrying out a water separation in the vacuum system of a paper machine, which has a concrete separation tank with inlet pipe and outlet pipe. This apparatus has a baffle arrangement (1) connected to the inlet pipe (8) and a water separator vessel (2). Further, a droplet separation cell (4) is mounted at the mouth of the outlet pipe (9).
    公开号:CH705105B1
    申请号:CH01886/12
    申请日:2011-03-15
    公开日:2016-03-31
    发明作者:Juha Karvinen
    申请人:Runtech Systems Oy；
    IPC主号:
    专利说明:

    The invention relates according to the preamble of claim 1 to an apparatus for performing a water separation in the vacuum system of a paper machine. Furthermore, the invention relates to a method according to claim 7.
    It is well known to use a vacuum to dewater a web at the front end of a paper / cellulose / papermaking machine. The removed water must be separated from the vacuum flow before the air is transferred to a vacuum pump or blower. For this purpose, a steel container has conventionally been used in which the flow is retarded and water is separated from air using a cyclone concept. For larger volumes of airflow concrete containers have been developed in which the separation of water by delaying the flow rate and then the guiding of the water-air aerosol via droplet deposition lamellar plates takes place. In the accompanying drawing (Figure 1) a typical embodiment of a concrete separation vessel is shown; this construction is used, for example, in the arrangement disclosed in 1985 by Sulzer Escher Wyss.
    In the prior art, this structure is used together with vacuum systems that are equipped with turbo blowers. In practice, the system is relatively functional, but requires a lot of maintenance by the operator. A particular problem arises from the adherence of pulp to the walls of the container assembly as well as to the droplet deposition fin plates. The efficiency of the deposition is significantly worsened when the lamellar plates collect a layer of pulp. As a result, fibers can go with the air flow to the vacuum pump / blower. In turbo blowers the Papierbreifasern adhere to the paddle wheel, which can be unbalanced. Pulp also adheres to the flow passages of the fan, causing a loss of vacuum efficiency. In addition, in certain blower assemblies, pulp has penetrated the labyrinth seals between the paddle wheels, causing damage in the blower.
    It should also be noted that in the construction of the prior art lamella plates are arranged in the middle of the deposition vessel. During maintenance of the system, its operators must have access to the space behind the lamellar plates to clean the entire container. The slat plate compartment must be provided with a door that can be opened during a shutdown for the purpose of maintenance. Cleaning the lamellar plates is an extremely slow process and, moreover, they are expensive to manufacture.
    It is a further disadvantage that in practice a long pipe must be used to connect this type of concrete separator tank with the blowers. Since the vacuum flow occurs at 100% RH and the air in the long pipe is cooled, condensation occurs. Thereafter, the condensed water causes erosion in the fan blades of the blower. These problems must be eliminated.
    Now, the present invention provides a solution by a new type of device that uses an improved method of water separation in a vacuum system.
    The main features of the invention are of great importance to the device and the method using them as described in the claims. More specifically, the invention is characterized by what is disclosed in the appended independent claims.
    Now, the invention will be described in more detail with reference to the accompanying drawings, in which<Tb> FIG. Fig. 1 shows an embodiment of a construction of the prior art;<Tb> FIG. Figure 2 shows a preferred embodiment of a construction according to the invention;<Tb> FIG. Figure 3 shows a sectional view of a structure according to the invention seen from above; and<Tb> FIG. Figure 4 shows a preferred embodiment of a construction according to the invention.
    Figs. 2 and 3 illustrate an apparatus according to the invention and a method using the same. The invention discloses a new concept which can overcome the disadvantages of the prior art. In Figs. 2 and 3, the concrete separation vessel is shown both in section and from above along a line A-A. The separator tank has a capped manhole 3 adapted to move the interior arrangement of the tank therein. The separated water is pumped out by a drain pump 5.
    It is a main feature of the invention that the inlet pipe of the concrete separation tank is provided with a baffle arrangement 1, which directs water and pulp to the bottom of the separator tank. In this pre-separator, the air flow is gradually delayed, without causing a vacuum loss. The baffle arrangement 1 has a multi-part construction, which most advantageously comprises two parts 1A and 1B, which are separated from each other by a first gap 10. In the first gap 10, the flow cross section is twice as large as the flow cross section of the inlet tube 8. In the second gap 11, the flow cross section is twice as large as the flow cross section of the first gap 10. The delay flow directs the water by gravity down. At the bottom of the pre-separator, a Wasserabscheidergefäss 2 is arranged, which serves to prevent the air flow 12 from reaching the container bottom. In this way, the airflow 12 is forced to flow along the walls and the ceiling of the separator tank, whereby the residual water in the air stream 12 is further deposited and then flows along the container walls to its bottom.
    The container has no lamellar plates in its center, but instead a droplet deposition cell 4 is arranged at the mouth of the outlet tube. In the droplet deposition cells used in the prior art, air flows through narrow slits, causing the droplets to coalesce, after which the droplets of increased size fall down by gravity. The cross-sectional configuration of the cell 4 may be made using automated techniques. According to the invention, the plates of the droplet deposition cell are coated with PTFE or another dirt-repellent material. If necessary, a small amount of clean water can be sprayed in front of the cell. Disposed in front of the cell and at the outlet tube end are plates 6 and 7 which serve to prevent a direct flow of air into the outlet tube 9.
    In Fig. 4, a preferred embodiment of the structure according to the invention is shown in which four turbo blowers 13 are installed on the concrete deposition vessel. If light blowers are used where the impeller is mounted directly on the shaft of the drive motor, the equipment can be easily placed on the concrete separation vessel described above. This design offers savings in the base area of the mill and the pipeline costs. The tube 12 is a short part between the blower and the deposition vessel, most preferably only one pipe bend. If desired, this curvature can be isolated, thereby completely avoiding condensation therein. Fig. 4 illustrates a feasible structure showing the blower outlet pipe 9 and the blower inlet pipe 8 connected to the deposition tank.
    On the basis of the above description, the invention clearly provides clear advantages. Thus, the droplet deposition system according to the invention can be manufactured at a lower cost than the prior art construction illustrated in Figure 1; it also provides improved deposition efficiency and faster maintenance. It is a primary object of the present invention to simplify the user's maintenance tasks and to achieve a higher degree of separation. For the purposes of the invention, proper guidance of airflows in the deposition vessel, particularly along its walls, is extremely important. As proven by practical tests, this feature significantly improves the deposition efficiency.
    It will be obvious to one skilled in the art that the invention is not limited to the above-described exemplary embodiments, but can be varied within the scope of the appended claims.
    权利要求:
    Claims (10)
    [1]
    Device for carrying out a water separation in the vacuum system of a paper machine, which has a concrete separation vessel with inlet pipe and outlet pipe, characterized in that the device has a baffle arrangement (1) which is connected to the inlet pipe (8) and an underlying water separator vessel (8). 2) and that a droplet separation cell (4) is mounted at the mouth of the outlet tube (9).
    [2]
    2. Apparatus according to claim 1, characterized in that the baffle arrangement (1) is constructed to serve as a pre-separator, wherein these gaps (10, 11) of different size, to delay an air flow (12) gradually.
    [3]
    3. Apparatus according to claim 2, characterized in that in a first gap (10) of the flow cross section is twice as large as the flow cross section of the inlet tube (8), and in a second gap (11) of the flow cross section is twice as large as the flow cross section the first gap (10).
    [4]
    4. Apparatus according to claim 3, characterized in that the baffle arrangement (1) has a multi-part structure, which most advantageously comprises two parts (1A, 1B) which are separated from each other by the first gap (10).
    [5]
    5. Device according to one of claims 1 to 4, characterized in that in front of the droplet deposition cell (4) and the outlet pipe (9) each plates (6, 7) are arranged, which serve to direct a flow of air into the outlet pipe (9). to prevent.
    [6]
    6. Apparatus according to claim 5, characterized in that the plates of the droplet deposition cell (4) are coated with a dirt-repellent material, in particular with PTEF.
    [7]
    Method for carrying out a water separation in the vacuum system of a paper machine, comprising a device according to one of claims 2 to 6, characterized in that a baffle arrangement (1) which is suitable for working together with an inlet pipe (8), water and separating pulp and directing it to the bottom of the separator tank, the baffle arrangement (1) having at its lower end a water separator vessel (2) for preventing the air flow (12) from reaching the tank floor to cause air flow (12) to direct an outlet pipe (9) via a droplet deposition cell (4) located at its mouth.
    [8]
    8. The method according to claim 7, characterized in that the baffle arrangement (1) operates as a pre-separator in such a way that gaps (10, 11) of the assembly (1) are formed to delay the air flow (12) gradually and direct the water by gravity down to the container bottom, from where the separated water is pumped by a drain pump (5).
    [9]
    9. The method according to claim 7 or 8, characterized in that the air flow (12) is forced to flow along the walls and the ceiling of the separator tank, wherein the residual water in the air stream (12) is further deposited and then along the container walls down flows to the deposition tank bottom.
    [10]
    10. The method according to any one of claims 8 to 9, characterized in that the air flow is delayed by the baffle arrangement (1) is provided with a multi-part structure containing two parts (1A, 1B), which from each other through a first gap (10) are separated, such that the first gap (10) has a flow cross section twice as large as the flow cross section of the inlet pipe (8); and that a second gap (11) has a flow cross section twice as large as the flow cross section of the first gap (10).
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    同族专利:
    公开号 | 公开日
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    DE112011101248T5|2013-05-29|
    US8206491B2|2012-06-26|
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    CN102883790B|2016-10-12|
    CN102883790A|2013-01-16|
    FI122330B|2011-12-15|
    引用文献:
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    CA1041865A|1975-06-27|1978-11-07|Donald F. Gerdes|Fire control system for spray booth|
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    JP2005515053A|2001-10-31|2005-05-26|サエスピュアガスインコーポレーテッド|Air purification system and method for maintaining a nitrogen / oxygen ratio by a regenerative purification unit|
    US6852146B2|2002-07-12|2005-02-08|Acs Industries, Lp|Pocket vane particle and droplet eliminator|
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    CN201371007Y|2009-02-12|2009-12-30|武汉三联节能环保工程有限公司|High-efficiency baffle-plate oil/ mist eliminator|CN103245143B|2012-02-14|2016-09-21|浙江三花股份有限公司|Gas-liquid separator|
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    CN110685341B|2018-07-06|2020-11-20|深圳市迈斯艾尔科技发展有限公司|Automatic drainage device for vacuum|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI20105361A|FI122330B|2010-04-09|2010-04-09|Apparatus for water separation in a paper machine's vacuum system and method using the same|
    PCT/FI2011/050221|WO2011124749A1|2010-04-09|2011-03-15|Apparatus for water separation in the vacuum system of a paper machine and method for utilizing the same|
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