Uniform spraying type multi-filtering flue gas desulfurization and denitrification equipment for coal-fired boiler

Abstract

The utility model relates to the technical field of flue gas desulfurization and denitrification equipment, in particular to uniform spraying type multi-filtering flue gas desulfurization and denitrification equipment for a coal-fired boiler, which comprises a treatment barrel, the treatment barrel is arranged on the ground through supporting legs, a plurality of gas inlets and discharge ports are respectively arranged on the treatment barrel, a spraying mechanism is arranged in the treatment barrel, and a plurality of spray nozzles are arranged on the treatment barrel. A top cover is arranged at the top of the treatment barrel, a gas outlet is formed in the top cover, a filtering mechanism is arranged at the gas outlet of the top cover, and a sealing mechanism is further arranged in the treatment barrel. Therefore, the pollution to the environment can be better reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization and denitration equipment, in particular to a uniform spray type multi-filtration flue gas desulfurization and denitration equipment for a coal-fired boiler. Background Art

[0002] Flue gas desulfurization and denitrification technology is a boiler flue gas purification technology applied to the chemical industry that produces a lot of nitrogen oxides and sulfur oxides. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution. Therefore, the application of this technology has many benefits for environmental air purification. Known flue gas desulfurization and denitrification technologies include PAFP, ACFP, pyrolusite method, electron beam ammonia method, pulse corona method, gypsum wet method, catalytic oxidation method, microbial degradation method and other technologies. However, the desulfurization and denitrification devices on the market still have various problems. For example, the desulfurization and denitrification devices in the prior art cannot spray the washing liquid over a large area during the actual working process, so that the flue gas desulfurization and denitrification cannot achieve the ideal washing effect, which has certain limitations. For this reason, we propose a boiler flue gas desulfurization and denitrification device.

[0003] Chinese patent CN114682016A discloses a boiler flue gas desulfurization and denitrification device, which belongs to the technical field of flue gas desulfurization and denitrification equipment, including a cylinder, and also includes: a top cover: the top cover is detachably mounted on the upper end surface of the cylinder; a filtering mechanism: the filtering mechanism is mounted inside the top cover, and the lower end of the filtering mechanism extends to the inside of the cylinder; a spraying mechanism: the spraying mechanism is used to spray the gas inside the cylinder; the invention can effectively improve the uniformity of the spraying through the spraying mechanism, thereby ensuring the actual use effect and quality of use; by setting the filtering mechanism, the gas after the spraying can be purified and filtered, and the aperture of the second filter is larger than the aperture of the first filter, and by setting the first filter and the second filter, the purpose of purification and filtration can be achieved twice, thereby ensuring the cleanliness of the gas after the spraying when it is output, and the use effect is good.

[0004] When treating the flue gas, the boiler flue gas desulfurization and denitrification device uses a spray mechanism to evenly spray the gas inside the cylinder with washing liquid and the flue gas for desulfurization and denitrification. The flue gas itself has strong fluidity, so after the flue gas enters the cylinder, some of the flue gas will still not be treated and will directly overflow from the top of the cylinder, so that the device cannot completely react with the flue gas, and will still cause pollution to the environment. Utility Model Content

[0005] In view of the above problems, a uniform spray multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers is provided, which can make the flue gas and the washing liquid undergo sufficient desulfurization and denitrification reaction through the sealing mechanism, thereby better reducing the pollution to the environment.

[0006] In order to solve the problems of the prior art, the utility model provides a uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for a coal-fired boiler, comprising a processing barrel, which is arranged on the ground through supporting legs, and is respectively provided with a plurality of air inlets and discharge ports, a spray mechanism is arranged inside the processing barrel, a top cover is arranged on the top of the processing barrel, an air outlet is arranged on the top cover, a filtering mechanism is arranged at the air outlet of the top cover, and a sealing mechanism is also arranged inside the processing barrel.

[0007] Preferably, the sealing mechanism comprises a guide seat and a sealing plate; the guide seat is arranged in the processing barrel, and a through hole is arranged in the middle of the guide seat; the sealing plate is movably arranged on the guide seat, and a guide groove for movement of the sealing plate is arranged on the guide seat.

[0008] Preferably, a moving component capable of driving the sealing plate to move is provided on the processing barrel, and the moving component includes a first base, a rotating motor, a connecting block, a rotating screw and a second pulley; the first base is arranged on the processing barrel; the rotating motor is arranged on the first base, and a first pulley is arranged on the output end of the rotating motor; the connecting block is movably arranged on the guide seat, and a slide groove for movement of the connecting block is arranged on the guide seat, and the connecting block is connected to the sealing plate; the rotating screw is arranged on the first base through a bearing seat, and the rotating screw is threadedly connected to the connecting block; the second pulley is arranged on the rotating screw, and the second pulley is rotatably connected to the first pulley through a belt.

[0009] Preferably, a first filter plate is further provided on the sealing plate, the first filter plate is provided on a side of the sealing plate close to the rotating motor, and a placement groove for installing the first filter plate is provided on the sealing plate.

[0010] Preferably, a guiding part capable of guiding the movement of the sealing plate is provided on the processing barrel, and the guiding part includes a fixed seat, a guiding block and a guiding rod; the fixed seat is arranged on the outer wall surface of the processing barrel, and a fixing plate is arranged on the fixed seat; the guiding block is arranged on the side of the sealing plate away from the connecting block; the guiding rod is arranged on the fixing plate, and the side of the guiding rod away from the fixing plate can penetrate the guiding block and connect with the guiding seat.

[0011] Preferably, the filtering mechanism includes an air outlet hood, a second filter plate and a third filter plate; the air outlet hood is arranged on the top cover, and the air outlet hood is respectively provided with a first placement plate and a second placement plate, and the first placement plate and the second placement plate are respectively slidably connected to the air outlet hood; the second filter plate is arranged on the first placement plate, and the first placement plate is provided with a first mounting groove; the third filter plate is arranged on the second placement plate, and the second placement plate is provided with a second mounting groove.

[0012] Preferably, the air outlet hood is provided with a plurality of driving components capable of driving the second filter plate and the third filter plate to move, the driving components comprising a connecting plate, a second base, an electric push rod and a connecting shaft; there are two connecting plates, and the two connecting plates are respectively connected to the first placement plate and the second placement plate; the second base is arranged on the top cover; the electric push rod is arranged on the second base, and a fixing block is arranged on the working end of the electric push rod; the number of connecting shafts is the same as the number of connecting plates, the connecting shaft is arranged between the connecting plate and the fixing block, and one side of the connecting shaft is connected to the fixing block, and the other side is threadedly connected to the connecting plate.

[0013] Preferably, a collecting assembly is provided at the bottom of the processing barrel, and the collecting assembly includes a collecting tank, which is provided below the processing barrel, and a fourth filter plate is provided in the collecting tank.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model forms a sealed space inside the treatment barrel through a sealing mechanism, thereby enabling the flue gas and the washing liquid to undergo sufficient desulfurization and denitrification reactions, thereby better reducing pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a three-dimensional structural diagram of a uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for a coal-fired boiler.

[0016] Figure 2 The present invention is a cross-sectional view of the internal three-dimensional structure of a uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for a coal-fired boiler.

[0017] Figure 3 This application Figure 2 A local enlarged schematic diagram of point A in the middle.

[0018] Figure 4 A partial three-dimensional structural cutaway view of a uniform spray multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers Figure 1 .

[0019] Figure 5 This application Figure 4 A local enlarged schematic diagram of point B in the middle.

[0020] Figure 6 A partial three-dimensional structural cutaway view of a uniform spray multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers Figure 2 .

[0021] Figure 7 The present invention is a partial three-dimensional structural schematic diagram of a uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for a coal-fired boiler.

[0022] The numbers in the figure are: 1, treatment barrel; 11, support leg; 12, air inlet; 13, discharge port; 2, spray mechanism; 3, top cover; 31, air outlet; 4, sealing mechanism; 41, guide seat; 411, through hole; 412, guide groove; 42, sealing plate; 421, placement groove; 422, first filter plate; 43, moving assembly; 431, connecting block; 432, slide groove; 433, rotating screw rod; 434, first base; 435, rotating motor; 436, first pulley; 437, second pulley; 438, belt; 44. Guide part; 441. Guide rod; 442. Guide block; 443. Fixed plate; 444. Fixed seat; 5. Filter mechanism; 51. Air outlet hood; 52. First placement plate; 521. First mounting groove; 53. Second placement plate; 531. Second mounting groove; 54. Second filter plate; 55. Third filter plate; 57. Drive assembly; 571. Connecting plate; 572. Second base; 573. Electric push rod; 574. Fixed block; 575. Connecting shaft; 6. Collecting assembly; 61. Collecting groove; 62. Fourth filter plate. DETAILED DESCRIPTION

[0023] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Reference Figures 1 to 7 As shown, a uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for a coal-fired boiler includes a processing barrel 1, which is set on the ground through supporting legs 11. The processing barrel 1 is respectively provided with multiple air inlets 12 and discharge ports 13. The interior of the processing barrel 1 is provided with a spraying mechanism 2, and the top of the processing barrel 1 is provided with a top cover 3, and the top cover 3 is provided with an air outlet 31. A filtering mechanism 5 is provided at the air outlet 31 of the top cover 3, and a sealing mechanism 4 is also provided inside the processing barrel 1.

[0025] When it is necessary to desulfurize and denitrify the flue gas generated by the coal-fired boiler, first, the flue gas outlet of the coal-fired boiler is connected to the air inlet 12 of the processing barrel 1 through an external pipe, and a control valve is set at the air inlet 12 of the processing barrel 1, and then the sealing mechanism 4 is started to seal the inside of the processing barrel 1. After a certain amount of flue gas enters the processing barrel 1, the control valve is closed, and then the spraying mechanism 2 is started at the same time to evenly spray the washing liquid on the inside of the processing barrel 1, so that the washing liquid and the flue gas react to desulfurize and denitrify, and then purify the flue gas, and then open the sealing mechanism 4, so that the purified flue gas enters the filtering mechanism 5 through the air outlet 31 of the top cover 3, and then the purified flue gas is filtered multiple times by the filtering mechanism 5, and then the flue gas after multiple filtration is discharged into the atmosphere, and the sealing mechanism 4 allows the inside of the processing barrel 1 to form a sealed space, so that the flue gas and the washing liquid can react sufficiently to desulfurize and denitrify, thereby better reducing pollution to the environment.

[0026] Reference Figure 2 As shown, the sealing mechanism 4 includes a guide seat 41 and a sealing plate 42; the guide seat 41 is arranged in the processing barrel 1, and a through hole 411 is arranged in the middle of the guide seat 41; the sealing plate 42 is movably arranged on the guide seat 41, and a guide groove 412 for the sealing plate 42 to move is arranged on the guide seat 41.

[0027] When it is necessary to seal the interior of the processing barrel 1, the sealing plate 42 is directly driven to move in the guide groove 412 of the guide seat 41, and then the through hole 411 on the guide seat 41 is closed by the sealing plate 42, so that the interior of the processing barrel 1 is sealed, and then the flue gas is desulfurized and denitrified, and then the sealing plate 42 is driven to move, so that the through hole 411 of the guide seat 41 is opened, and then the flue gas will continue to flow to the top cover 3 through the through hole 411 of the guide seat 41.

[0028] Reference Figure 4 and Figure 5As shown, a moving assembly 43 capable of driving the sealing plate 42 to move is provided on the processing barrel 1, and the moving assembly 43 includes a first base 434, a rotating motor 435, a connecting block 431, a rotating screw 433 and a second pulley 437; the first base 434 is arranged on the processing barrel 1; the rotating motor 435 is arranged on the first base 434, and a first pulley 436 is arranged on the output end of the rotating motor 435; the connecting block 431 is movably arranged on the guide seat 41, and a slide groove 432 for the connecting block 431 to move is arranged on the guide seat 41, and the connecting block 431 is connected to the sealing plate 42; the rotating screw 433 is arranged on the first base 434 through a bearing seat, and the rotating screw 433 is threadedly connected to the connecting block 431; the second pulley 437 is arranged on the rotating screw 433, and the second pulley 437 is rotatably connected to the first pulley 436 through a belt 438.

[0029] By directly starting the rotating motor 435 on the first base 434, when the rotating motor 435 is working, it will synchronously drive the first pulley 436 to rotate, so that through the setting of the belt 438, it will synchronously drive the second pulley 437 to rotate, so that it will also synchronously drive the rotating screw 433 to rotate, and then the connecting block 431 will move in the slide groove 432 of the guide seat 41, thereby directly driving the sealing plate 42 to move, so that the sealing plate 42 can be directly driven to move through the operation of the rotating motor 435, thereby improving the convenience of operating the sealing plate 42.

[0030] Reference Figure 4 As shown, a first filter plate 422 is further disposed on the sealing plate 42 . The first filter plate 422 is disposed on a side of the sealing plate 42 close to the rotating motor 435 , and a placement groove 421 for installing the first filter plate 422 is disposed on the sealing plate 42 .

[0031] When the sealing plate 42 is not working, that is, the interior of the processing barrel 1 is not sealed, the first filter plate 422 on the sealing plate 42 will move to the through hole 411 of the guide seat 41, and then when the flue gas flows to the top cover 3, the flue gas has been filtered for the first time by the first sealing plate 42, thereby improving the flue gas purification effect, and through the operation of the rotating motor 435, the first filter plate 422 will also be driven to move to the outside of the processing barrel 1, and the first filter plate 422 is placed in the placement groove 421 of the sealing plate 42, so that the first filter plate 422 can be quickly removed from the sealing plate 42, thereby improving the convenience of cleaning or replacing the first filter plate 422.

[0032] Reference Figure 6As shown, a guide portion 44 capable of guiding the movement of the sealing plate 42 is provided on the processing barrel 1, and the guide portion 44 includes a fixed seat 444, a guide block 442 and a guide rod 441; the fixed seat 444 is arranged on the outer wall surface of the processing barrel 1, and a fixed plate 443 is arranged on the fixed seat 444; the guide block 442 is arranged on the side of the sealing plate 42 away from the connecting block 431; the guide rod 441 is arranged on the fixed plate 443, and the side of the guide rod 441 away from the fixed plate 443 can penetrate the guide block 442 and be connected to the guide seat 41.

[0033] When the sealing plate 42 moves, only one side of the sealing plate 42 is driven to move by the connecting block 431. Thus, the sealing plate 42 may be displaced after a long period of movement. In this way, the guide block 442 moves on the guide rod 441, which can also have a guiding and limiting effect on the other side of the connecting block 431, thereby improving the stability of the sealing plate 42 under long-term work, and further improving the effect of flue gas desulfurization and denitrification treatment.

[0034] Reference Figure 2 and Figure 3 As shown, the filtering mechanism 5 includes an air outlet hood 51, a second filter plate 54 and a third filter plate 55; the air outlet hood 51 is arranged on the top cover 3, and the air outlet hood 51 is respectively provided with a first placement plate 52 and a second placement plate 53, and the first placement plate 52 and the second placement plate 53 are respectively slidably connected to the air outlet hood 51; the second filter plate 54 is arranged on the first placement plate 52, and the first placement plate 52 is provided with a first mounting groove 521; the third filter plate 55 is arranged on the second placement plate 53, and the second placement plate 53 is provided with a second mounting groove 531.

[0035] When the smoke continues to flow outward through the air outlet 31 of the top cover 3, it will first continue to flow into the air outlet hood 51, and an exhaust fan is provided at the top of the air outlet hood 51, so as to accelerate the flow of the smoke, so that the smoke will be filtered again when passing through the second filter plate 54 and the third filter plate 55, and the filter hole of the third filter plate 55 is smaller than the filter hole of the second filter plate 54, and the filter hole of the second filter plate 54 is also smaller than the filter hole of the first filter plate 422, so that a multiple filtering effect can be formed on the smoke, and the first placement plate 52 and the second placement plate 53 can respectively drive the second filter plate 54 and the third filter plate 55 to move on the air outlet hood 51, so that when the first placement plate 52 and the second placement plate 53 are moved to the outside of the air outlet hood 51, the second filter plate 54 and the third filter plate 55 are directly removed from the first mounting groove 521 of the first placement plate 52 and the second mounting groove 531 of the second placement plate 53, respectively, thereby improving the convenience of cleaning or replacing the second filter plate 54 and the third filter plate 55.

[0036] Reference Figure 7As shown, the air outlet hood 51 is provided with a plurality of driving components 57 capable of driving the second filter plate 54 and the third filter plate 55 to move, and the driving component 57 includes a connecting plate 571, a second base 572, an electric push rod 573 and a connecting shaft 575; there are two connecting plates 571, and the two connecting plates 571 are connected to the first placement plate 52 and the second placement plate 53 respectively; the second base 572 is arranged on the top cover 3; the electric push rod 573 is arranged on the second base 572, and a fixing block 574 is arranged on the working end of the electric push rod 573; the number of connecting shafts 575 is the same as the number of connecting plates 571, the connecting shaft 575 is arranged between the connecting plate 571 and the fixing block 574, and one side of the connecting shaft 575 is connected to the fixing block 574, and the other side is threadedly connected to the connecting plate 571.

[0037] By starting the electric push rod 573 on the second base 572, when the working end of the electric push rod 573 extends outward, it will synchronously drive the fixing block 574 to move, and then synchronously drive the connecting shaft 575 to move. In this way, through the setting of the connecting plate 571, the first placement plate 52 and the second placement plate 53 will be synchronously driven to move on the air outlet hood 51. When the second filter plate 54 and the third filter plate 55 need to be removed, it is only necessary to work the electric push rod 573, which further improves the convenience of operating the second filter plate 54 and the third filter plate 55.

[0038] Reference Figure 2 As shown, a collecting assembly 6 is disposed at the bottom of the processing barrel 1 . The collecting assembly 6 includes a collecting tank 61 . The collecting tank 61 is disposed below the processing barrel 1 , and a fourth filter plate 62 is disposed in the collecting tank 61 .

[0039] Because the flue gas and the washing liquid react to form granular substances after desulfurization and denitrification, the granular substances and the washing liquid after the reaction will be discharged outward through the discharge port 13 of the treatment barrel 1, and then discharged into the collecting tank 61, and then the granular substances and the washing liquid are filtered and separated by the fourth filter plate 62 on the collecting tank 61, so that the granular substances and the washing liquid after the desulfurization and denitrification reaction of the flue gas and the washing liquid can be quickly separated, and directly collected through the collecting tank, thereby further reducing pollution to the environment.

[0040] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers, characterized in that: The invention comprises a processing barrel (1), wherein the processing barrel (1) is arranged on the ground via supporting legs (11), a plurality of air inlets (12) and discharge ports (13) are respectively arranged on the processing barrel (1), a spray mechanism (2) is arranged inside the processing barrel (1), a top cover (3) is arranged on the top of the processing barrel (1), an air outlet (31) is arranged on the top cover (3), a filtering mechanism (5) is arranged at the air outlet (31) of the top cover (3), and a sealing mechanism (4) is also arranged inside the processing barrel (1).

2. The uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers according to claim 1 is characterized in that: The sealing mechanism (4) comprises a guide seat (41) and a sealing plate (42); The guide seat (41) is arranged in the processing barrel (1), and a through hole (411) is arranged in the middle of the guide seat (41); The sealing plate (42) is movably arranged on the guide seat (41), and the guide seat (41) is provided with a guide groove (412) for the sealing plate (42) to move.

3. The uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers according to claim 2 is characterized in that: A moving assembly (43) capable of driving the sealing plate (42) to move is arranged on the processing barrel (1), and the moving assembly (43) comprises a first base (434), a rotating motor (435), a connecting block (431), a rotating screw rod (433) and a second pulley (437); The first base (434) is disposed on the processing barrel (1); The rotating motor (435) is arranged on the first base (434), and a first pulley (436) is arranged on the output end of the rotating motor (435); The connecting block (431) is movably arranged on the guide seat (41), a slide groove (432) for the connecting block (431) to move is arranged on the guide seat (41), and the connecting block (431) is connected to the sealing plate (42); The rotating screw rod (433) is arranged on the first base (434) through a bearing seat, and the rotating screw rod (433) is threadedly connected to the connecting block (431); The second pulley (437) is disposed on the rotating screw rod (433), and the second pulley (437) is rotatably connected to the first pulley (436) via a belt (438).

4. The uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers according to claim 3 is characterized in that: A first filter plate (422) is also provided on the sealing plate (42). The first filter plate (422) is provided on a side of the sealing plate (42) close to the rotating motor (435), and a placement groove (421) for installing the first filter plate (422) is provided on the sealing plate (42).

5. The uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers according to claim 3 is characterized in that: The processing barrel (1) is provided with a guide portion (44) capable of guiding the sealing plate (42) to move, and the guide portion (44) comprises a fixing seat (444), a guide block (442) and a guide rod (441); The fixing seat (444) is arranged on the outer wall surface of the processing barrel (1), and a fixing plate (443) is arranged on the fixing seat (444); The guide block (442) is arranged on a side of the sealing plate (42) away from the connecting block (431); The guide rod (441) is arranged on the fixing plate (443), and a side of the guide rod (441) away from the fixing plate (443) can penetrate the guide block (442) and be connected to the guide seat (41).

6. The uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers according to claim 1 is characterized in that: The filtering mechanism (5) comprises an air outlet cover (51), a second filtering plate (54) and a third filtering plate (55); The air outlet hood (51) is arranged on the top cover (3), and a first placement plate (52) and a second placement plate (53) are respectively arranged on the air outlet hood (51), and the first placement plate (52) and the second placement plate (53) are respectively slidably connected to the air outlet hood (51); The second filter plate (54) is arranged on the first placement plate (52), and the first placement plate (52) is provided with a first installation groove (521); The third filter plate (55) is arranged on the second placement plate (53), and the second placement plate (53) is provided with a second installation groove (531).

7. The uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers according to claim 6, characterized in that: The air outlet hood (51) is provided with a plurality of drive assemblies (57) capable of driving the second filter plate (54) and the third filter plate (55) to move, and the drive assemblies (57) include a connecting plate (571), a second base (572), an electric push rod (573) and a connecting shaft (575); There are two connecting plates (571), and the two connecting plates (571) are respectively connected to the first placement plate (52) and the second placement plate (53); The second base (572) is disposed on the top cover (3); The electric push rod (573) is arranged on the second base (572), and a fixing block (574) is arranged on the working end of the electric push rod (573); The number of the connecting shafts (575) is the same as the number of the connecting plates (571). The connecting shafts (575) are arranged between the connecting plate (571) and the fixing block (574), and one side of the connecting shaft (575) is connected to the fixing block (574), and the other side is threadedly connected to the connecting plate (571).

8. The uniform spray type multi-filtration flue gas desulfurization and denitrification equipment for coal-fired boilers according to claim 1 is characterized in that: A collecting assembly (6) is arranged at the bottom of the processing barrel (1), and the collecting assembly (6) comprises a collecting tank (61). The collecting tank (61) is arranged below the processing barrel (1), and a fourth filter plate (62) is arranged in the collecting tank (61).

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