A wet scrubber

Abstract

The present invention relates to the field of waste gas treatment technology, and specifically to a wet scrubbing tower, comprising a tower body; at least one support platform provided in the tower body for carrying a filler, the bottom end of the support platform being hollowed out to allow waste gas to penetrate the support platform and contact the filler; and a first spray system provided in the tower body. The present invention adds a second spray system to the original first spray system, so that the first nozzle of the first spray system sprays an absorption liquid onto the filler from a first direction, thereby spraying from the outside to the inside, while the second nozzle of the second spray system sprays the absorption liquid from the inside of the filler outwardly along a second direction onto the filler layer, thereby spraying from the inside to the outside, thereby allowing two absorption liquids with different flows to meet in the filler layer, effectively improving the wetting efficiency of the filler layer.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, in particular to a wet scrubber. Background Art

[0002] The wet scrubber is a key equipment for treating harmful gases in semiconductor production. It mainly removes pollutants through gas-liquid contact and chemical reaction. It consists of a tower body with an air inlet and an air outlet at the bottom and top respectively. A packing layer (PP or ceramic packing) is provided in the tower body, and a spray system is provided above the packing layer. The spray system is used to atomize and spray the absorption liquid (such as NaOH, H2SO4 solution) to cover the surface of the packing. The spray system includes a nozzle, a circulation pump and a pipeline. A demister is also provided at the top of the tower body near the air outlet. When working, the spray system sprays the absorption liquid on the packing through the nozzle. The exhaust gas enters from the air inlet at the bottom of the tower and contacts with the absorption liquid from top to bottom in the packing layer in countercurrent. The pollutants enter the liquid phase through diffusion, dissolution or chemical reaction. The purified gas is discharged after dehydration by the demister, and the waste liquid enters the treatment system.

[0003] The current technical problem is: before the exhaust gas is introduced into the packing layer of the wet scrubber, the spray system usually needs to run for about 10 to 15 minutes in advance to ensure that the packing layer is fully moistened by the absorption liquid until a uniform liquid film is formed on the surface of the packing. The waiting time is long and the exhaust gas cannot be treated during this period. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to propose a wet scrubber to solve the technical problem that the existing wet scrubber needs to spend a long time to wet the packing layer before use, resulting in low exhaust gas treatment efficiency.

[0005] Based on the above objectives, the present invention provides a wet scrubber, comprising:

[0006] tower body;

[0007] At least one support platform for carrying fillers is provided in the tower body, wherein the bottom end of the support platform is hollowed out to allow exhaust gas to penetrate the support platform and contact the fillers;

[0008] a first spraying system provided in the tower body, the first spraying system comprising a plurality of first spraying heads located above the support platform, the first spraying heads being used to spray the absorption liquid onto the upper end of the filler along a first direction;

[0009] A second spray system is provided in the tower body, and the second spray system includes a plurality of second nozzles embedded in the packing. The second nozzles are used to spray the absorption liquid onto the packing from the inside of the packing along a second direction. The second direction intersects with the first direction so that the two streams of the absorption liquid with different flow directions meet and blend inside the packing layer to quickly wet the packing.

[0010] As a preferred technical solution of the present invention, a liquid storage tank for storing absorption liquid is provided at the bottom end of the tower body.

[0011] As a preferred technical solution of the present invention, a filter plate is provided at the upper end of the tower body near the liquid storage tank.

[0012] As a preferred technical solution of the present invention, the first spray system includes:

[0013] a circulating pump fixedly connected to the tower body;

[0014] a first liquid outlet pipe having one end connected to the water outlet of the circulation pump;

[0015] a liquid sprinkling pipe having one end connected to the other end of the first liquid outlet pipe, the other end of the liquid sprinkling pipe penetrating the side wall of the tower body and extending into the tower body, a plurality of the first nozzles being arranged at intervals along the length of the liquid sprinkling pipe, the nozzles of the first nozzles being directed toward the support platform;

[0016] One end of a first liquid pumping pipe is connected to the water inlet end of the circulation pump, and the other end of the first liquid pumping pipe passes through the tower body and extends into the liquid storage tank.

[0017] As a preferred technical solution of the present invention, the second spray system includes:

[0018] a main pipe having one end passing through the middle of the support platform, the main pipe being hollow inside to form a pipeline for the absorption liquid to flow, and a plurality of second nozzles being arranged in a ring shape on the outer circumference of the main pipe with the axis of the main pipe as the center;

[0019] A water supply structure is connected to the main pipe at one end, and the water supply structure is used to pump the absorption liquid in the liquid storage tank into the main pipe, so that the absorption liquid is sprayed toward the packing layer through the main pipe and the second nozzle.

[0020] As a preferred technical solution of the present invention, the wet washing tower also includes a driving structure, which is used to drive the support platform to rotate around its center so that the absorption liquid sprayed into the filler diffuses from the middle to the outside under the action of centrifugal force to fully wet the filler.

[0021] As a preferred technical solution of the present invention, the driving structure includes:

[0022] A top support and a bottom support are respectively provided at the top and bottom ends of the tower body;

[0023] a bearing seat connected to the top support and the bottom support, the bearing seat being matched with the main pipe;

[0024] a drive motor provided at the lower end of the bottom support, wherein the output shaft of the drive motor passes through the bottom support and is connected to a first belt pulley;

[0025] a second belt pulley fixedly connected to the main pipe;

[0026] A belt is used to drively connect the first belt pulley with the second belt pulley.

[0027] As a preferred technical solution of the present invention, the water supply structure includes:

[0028] a piston box fixedly arranged at the bottom end of the tower body;

[0029] a second liquid pumping tube having one end connected to the piston box, and the other end of the second liquid pumping tube extending into the liquid storage tank;

[0030] a second liquid outlet pipe having one end connected to the piston box, and the other end of the second liquid outlet pipe being rotatably connected to the main pipe;

[0031] a one-way valve provided in the second liquid pumping pipe and the second liquid outlet pipe;

[0032] a piston movably disposed in the piston box;

[0033] A connecting rod having one end movably connected to the piston;

[0034] A turntable connected to the output shaft of the driving motor is provided with an eccentric shaft that rotates with the other end of the connecting rod.

[0035] As a preferred technical solution of the present invention, the support platform is provided with an outer wall and an inner wall extending along the length direction of the main pipe, the inner wall encloses a mounting groove for the main pipe to pass through, and a accommodating chamber for accommodating the filler is formed between the outer wall and the inner wall, and one end of the second nozzle passes through a through hole opened on the surface of the inner wall.

[0036] As a preferred technical solution of the present invention, the upper and lower ends of the outer side wall of the support platform extend outward along the center to form a flange, and the flange, the tower body and the outer side wall together form a temporary storage cavity for temporarily storing the absorption liquid. A through groove is provided on the surface of the outer side wall, and the through groove is used to introduce the absorption liquid in the accommodating chamber into the temporary storage cavity. A return pipe is provided on the outside of the tower body, one end of the return pipe is connected to the temporary storage cavity, and the other end of the return pipe is connected to the liquid storage tank.

[0037] Beneficial effects of the present invention: The present invention adds a second spray system on the basis of the original first spray system, so that the first nozzle of the first spray system sprays the absorption liquid onto the filler from a first direction, realizing spraying from the outside to the inside, and the second nozzle of the second spray system can spray the absorption liquid from the inside of the filler along the second direction outward onto the filler layer, realizing spraying from the inside to the outside, so that the two absorption liquids with different flows meet in the filler layer, effectively improving the wetting efficiency of the filler layer and shortening the preparation time of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0040] Figure 2 It is a side structural schematic diagram of the present invention;

[0041] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0042] Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention;

[0043] Figure 5 This is a schematic diagram of a half-section structure of the tower body according to the present invention;

[0044] Figure 6 This is a schematic diagram of the right front three-dimensional structure of a half-section tower body of the present invention;

[0045] Figure 7 This is a schematic diagram of a half-section structure of a tower body according to the present invention;

[0046] Figure 8 This is a schematic diagram of the left rear three-dimensional structure of a half-section tower body of the present invention;

[0047] Figure 9 This is a schematic diagram of the three-dimensional structure of the support platform, main pipe, drive motor, second nozzle and piston box of the present invention;

[0048] Figure 10 For the present invention Figure 9 A in the middle is an enlarged structural diagram;

[0049] Figure 11 For the present invention Figure 9 The enlarged structural diagram at B in the middle;

[0050] Figure 12 It is a schematic diagram of the partially cutaway three-dimensional structure of the drive motor, first belt pulley, second belt pulley, main pipe and piston box of the present invention.

[0051] The following are marked in the figure: 1. tower body; 2. air inlet; 3. air outlet; 4. support platform; 5. circulation pump; 6. first liquid extraction pipe; 7. first liquid outlet pipe; 8. liquid spraying pipe; 9. first nozzle; 10. liquid storage tank; 11. top support; 12. bearing seat; 13. main pipe; 14. end plate; 15. mounting slot; 16. bottom support; 17. drive motor; 18. first belt pulley; 19. second belt pulley; 20. belt; 21. turntable; 22. eccentric shaft; 23. Connecting rod; 24. Piston; 25. Piston box; 26. Second liquid extraction pipe; 27. Second liquid outlet pipe; 28. Rotary joint; 29. ​​Second nozzle; 30. Through hole; 31. Flange; 32. Liquid storage chamber; 33. Through groove; 34. Sleeve; 35. Inner bracket; 36. Movable rod; 37. Sealing cover; 38. End cover; 39. Spring; 40. Mesh plate; 41. Return pipe; 42. Filter plate; 43. Maintenance door; 44. Demisting layer; 45. Bottom hole; 46. Partition. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0053] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0054] like Figure 4 、 Figure 5 and Figure 6As shown, a wet scrubbing tower comprises a tower body 1; at least one support platform 4 for carrying filler provided in the tower body 1, preferably, three support platforms 4 are provided and arranged at intervals in the longitudinal direction, the bottom end of the support platform 4 is hollowed out to allow exhaust gas to penetrate the support platform 4 and contact the filler, preferably, a bottom hole 45 is opened at the bottom end of the support platform 4, the aperture of the bottom hole 45 is smaller than the particle size of the filler, a first spraying system provided in the tower body 1, the first spraying system comprises a plurality of first spray heads 9 located above the support platform 4, the first spray heads 9 are used to spray absorption liquid onto the upper end of the filler along a first direction; a second spraying system provided in the tower body 1, the second spraying system comprises a plurality of second spray heads 29 embedded in the filler, the second spray heads 29 are used to spray absorption liquid onto the filler from the inside of the filler along a second direction, the second direction intersecting with the first direction so that two absorption liquids with different flow directions meet and blend inside the filler layer and quickly wet the filler; preferably, the first direction is vertical and the second direction is horizontal;

[0055] The above-mentioned technical solution can improve the efficiency of wetting the packing layer. When in use, the first spray system is started, and the first spray system inputs the absorption liquid to the first nozzle 9 at a certain pressure, so that the absorption liquid is sprayed onto the packing layer at the upper end of the support platform 4 through the first nozzle 9. The absorption liquid is sprinkled vertically on the upper end of the packing layer. Under the action of gravity, the absorption liquid gradually penetrates downward along the gaps in the packing and gradually spreads to fill all the gaps. At the same time, the second spray system is started again, and the second spray system sprays the absorption liquid from the second nozzle 29 to the packing layer at a certain pressure. The absorption liquid is sprayed onto the packing layer in a horizontal direction, and the absorption liquid gradually diffuses outward from the middle of the packing layer. Therefore, by spraying in two directions and combining internal and external spraying, the absorption liquid is sprayed onto the packing layer. Compared with single vertical spraying, the wetting efficiency of the packing layer can be effectively improved.

[0056] like Figure 5 and Figure 6 As shown, in this embodiment, a liquid storage tank 10 for storing absorption liquid is provided at the bottom end of the tower body 1; a filter plate 42 is provided at the upper end of the tower body 1 near the liquid storage tank 10;

[0057] The above technical solution can store the absorption liquid at the bottom end of the tower body 1. When in use, with the operation of the first spray system and the second spray system, the absorption liquid sprayed on the filler will continue to penetrate downward under gravity until it passes through the hollow part of the support platform 4, and finally converge into the liquid storage tank 10 at the bottom end of the tower body 1. Since a filter plate 42 is provided, when the absorption liquid passes through the filter plate 42, the mixed particulate matter deposits, metal oxides and chemical reaction product accumulations in the absorption liquid will be filtered.

[0058] like Figure 4 and Figure 5As shown, in this embodiment, the first spray system includes: a circulation pump 5 fixedly connected to the tower body 1; a first liquid outlet pipe 7 having one end connected to the water outlet end of the circulation pump 5; a liquid spraying pipe 8 having one end connected to the other end of the first liquid outlet pipe 7, the other end of the liquid spraying pipe 8 passing through the side wall of the tower body 1 and extending into the tower body 1, a plurality of first spray heads 9 arranged at intervals along the length of the liquid spraying pipe 8, the spray holes of the first spray heads 9 pointing to the support platform 4; a first liquid extraction pipe 6 having one end connected to the water inlet end of the circulation pump 5, the other end of the first liquid extraction pipe 6 passing through the tower body 1 and extending into the liquid storage tank 10;

[0059] The above technical solution can be used to sprinkle the absorption liquid from the upper end of the filler. When in use, the circulation pump 5 is started, and the circulation pump 5 draws the absorption liquid in the liquid storage tank 10 through the first liquid extraction pipe 6, and pumps the absorption liquid into the liquid sprinkling pipe 8 through the first liquid outlet pipe 7. The liquid sprinkling pipe 8 sprays the absorption liquid through the first nozzle 9 on the surface, and the sprayed absorption liquid is sprinkled on the filler at the upper end of the support platform 4. The first nozzle 9 can be an atomizing nozzle.

[0060] like Figure 6 and Figure 8 As shown, in this embodiment, the second spray system includes: a main pipe 13 having one end passing through the middle of the support platform 4, the main pipe 13 being hollow inside to form a pipeline for the absorption liquid to circulate, a plurality of second nozzles 29 being arranged in a ring shape on the outer circumference of the main pipe 13 with the axis of the main pipe 13 as the center; a water supply structure having one end connected to the main pipe 13, the water supply structure being used to pump the absorption liquid in the liquid storage tank 10 into the main pipe 13, so that the absorption liquid is sprayed toward the packing layer through the main pipe 13 and the second nozzles 29;

[0061] The above technical solution can be used to sprinkle the absorption liquid from the inside of the filler. When in use, the water supply structure is started to draw the absorption liquid in the liquid storage tank 10 into the main pipe 13, and the absorption liquid is sprayed from the second nozzle 29 to the filler layer through the main pipe 13, thereby realizing spraying from the inside of the filler layer, thereby cooperating with the first spraying system to make the absorption liquid quickly wet the filler, reducing the time required for wetting.

[0062] like Figure 6 、 Figure 8 and Figure 9As shown, in this embodiment, the wet scrubber further includes a drive structure, which is used to drive the support platform 4 to rotate around its center so that the absorption liquid sprayed into the filler diffuses from the middle to the outside under the action of centrifugal force to fully wet the filler; specifically, the drive structure includes: a top support 11 and a bottom support 16 respectively provided at the top and bottom ends of the tower body 1; a bearing seat 12 connected to the top support 11 and the bottom support 16, and the bearing seat 12 cooperates with the main pipe 13; a drive motor 17 provided at the lower end of the bottom support 16, the output shaft of the drive motor 17 passes through the bottom support 16 and is connected to a first belt pulley 18; a second belt pulley 19 fixedly connected to the main pipe 13; and a belt 20 for drivingly connecting the first belt pulley 18 to the second belt pulley 19;

[0063] The above technical solution can further improve the wetting efficiency of the absorption liquid of the second spray system through centrifugal force. When in use, start the drive motor 17 to drive the first belt pulley 18 to rotate, and the first belt pulley 18 cooperates with the belt 20 to drive the second belt pulley 19 to rotate. The second belt pulley 19 drives the main pipe 13 to rotate, and the main pipe 13 drives the second nozzle 29 and the support platform 4 to rotate together, so that the absorption liquid located in the middle of the packing layer gradually diffuses outward under the action of centrifugal force, thereby improving the diffusion efficiency of the absorption liquid.

[0064] like Figure 9 and Figure 12 As shown, in this embodiment, the water supply structure includes: a piston box 25 fixedly arranged at the bottom end of the tower body 1; a second liquid pumping pipe 26 connected to the piston box 25 at one end, the other end of the second liquid pumping pipe 26 extending into the liquid storage tank 10; a second liquid outlet pipe 27 connected to the piston box 25 at one end, the other end of the second liquid outlet pipe 27 being rotatably connected to the main pipe 13; a one-way valve provided in the second liquid pumping pipe 26 and the second liquid outlet pipe 27; a piston 24 movably provided in the piston box 25; a connecting rod 23 movably connected to the piston 24 at one end; a turntable 21 connected to the output shaft of the drive motor 17, and provided with an eccentric shaft 22 rotatably engaged with the other end of the connecting rod 23.

[0065] The above technical solution can be used to pump the absorption liquid in the liquid storage tank 10 into the main pipe 13. When in use, as the output shaft of the drive motor 17 rotates, the turntable 21 will be driven to rotate synchronously. The turntable 21 drives the piston 24 to reciprocate in the piston box 25 through the eccentric shaft 22 and the connecting rod 23. When the piston 24 gradually leaves the piston box 25, a negative pressure will be created in the piston box 25, thereby drawing the absorption liquid in the liquid storage tank 10 into the piston box 25 through the second liquid extraction pipe 26. When the piston 24 is gradually pressed into the piston box 25, a high pressure will be created in the piston box 25, thereby squeezing the absorption liquid in the piston box 25 into the main pipe 13 through the second liquid outlet pipe 27, and then squeezing the absorption liquid into the second nozzle 29 through the main pipe 13. Since both the second liquid extraction pipe 26 and the second liquid outlet pipe 27 are provided with a one-way valve, the absorption liquid can be effectively prevented from flowing back, ensuring pressure stability.

[0066] like Figure 12 As shown, in this embodiment, a rotary joint 28 is provided at one end of the second liquid outlet pipe 27 connected to the main pipe 13. The rotary joint 28 rotates with a rotating groove provided inside the main pipe 13, and a sealing ring is provided at the gap between the rotary joint 28 and the rotating groove.

[0067] By adopting the above technical solution, the second liquid outlet pipe 27 can be connected to the main pipe 13 in a rotational manner, thereby preventing the second liquid outlet pipe 27 from being bent and deformed due to the rotation of the main pipe 13 .

[0068] like Figure 9 and Figure 11 As shown, in this embodiment, the support platform 4 is provided with an outer wall and an inner wall extending along the length direction of the main pipe 13. The inner wall encloses a mounting groove 15 for the main pipe 13 to pass through. An end plate 14 is provided on the outside of the main pipe 13. The end plate 14 is fixedly connected to the inner wall of the mounting groove 15. A chamber for accommodating a filler is formed between the outer wall and the inner wall. One end of the second nozzle 29 passes through a through hole 30 provided on the surface of the inner wall.

[0069] The above technical solution can isolate the filler from the second nozzle 29. When in use, the filler is added to the accommodating chamber formed by the outer wall and the inner wall at the upper end of the support platform 4 to prevent the filler from entering the gap between the second nozzles 29.

[0070] like Figure 8 and Figure 9 As shown, in this embodiment, a plurality of partitions 46 are provided on the support platform 4, and the partitions 46 are used to divide the accommodating chamber into a plurality of independent small accommodating chambers, so that the filler layers in each small accommodating chamber are isolated from each other;

[0071] The above technical solution can improve the wetting efficiency of the filler. By dividing the filler layer into multiple small filler layers, it can prevent the filler from agglomerating due to the stickiness of the dirt, thereby hindering the spreading speed of the absorption liquid. When the filler in a small accommodating chamber is damaged or severely clogged, only the damaged or severely clogged area needs to be replaced, saving filler materials and labor costs.

[0072] like Figure 7 and Figure 8 As shown, in this embodiment, the upper and lower ends of the outer wall of the support platform 4 extend outward along the center to form a flange 31. The flange 31, the tower body 1 and the outer wall together form a temporary storage cavity for temporarily storing the absorption liquid. A through groove 33 is opened on the surface of the outer wall. The through groove 33 is smaller than the size of the filler particles and larger than the size of the impurity particles. The through groove 33 is used to guide the absorption liquid in the accommodating chamber into the temporary storage cavity. A return pipe 41 is provided on the outside of the tower body 1. One end of the return pipe 41 is connected to the temporary storage cavity, and the other end of the return pipe 41 is connected to the liquid storage tank 10.

[0073] The above technical solution can be used to conveniently clean out the impurity particles concentrated in the packing layer. When in use, when the second nozzle 29 sprays the absorption liquid outward along the radial direction of the support platform 4, it will generate a certain pressure on the impurity particles in the packing layer. At the same time, the high-speed rotation of the support platform 4 can be conducive to guiding the impurity particles along the spraying direction of the absorption liquid, so that the impurity particles eventually enter the temporary storage cavity along with the absorption liquid through the through groove 33, and flow into the upper end of the filter plate 42 along the reflux pipe 41. The absorption liquid flows into the liquid storage tank 10 through the filter plate 42, and the impurity particles stay at the upper end of the filter plate 42, thereby achieving the cleaning of the packing;

[0074] When backwashing of the filler is required, the absorption liquid in the liquid storage tank 10 is replaced with clean water and a small amount of acid / alkali can be added to enhance the dissolution effect. The first spray system and the second spray system can be started at the same time, and clean water is sprayed onto the filler through the first nozzle 9 and the second nozzle 29. Generally, the flushing is carried out for 10 to 15 minutes, and the change in the turbidity of the drainage is observed until the discharged water is clear. The backwashed sewage can be partially bypassed by the support platform 4 through the return pipe 41 to prevent the flushed dirt from contaminating the next layer of support platform 4.

[0075] like Figure 9 and Figure 10As shown, in this embodiment, a sleeve 34 is further provided in the through slot 33 of the support platform 4. The sleeve 34 is hollow inside and open at both ends. An inner bracket 35 is provided in the sleeve 34. The inner bracket 35 is slidably connected to a movable rod 36. A cover 37 is provided at one end of the movable rod 36. An end cover 38 is provided at the other end of the movable rod 36. The end cover 38 has a certain weight. A spring 39 is provided between the end cover 38 and the inner bracket 35. A mesh plate 40 is provided at the other end of the sleeve 34 relative to the cover 37. The pore size of the mesh plate 40 is smaller than the size of the filler particles and larger than the size of the impurity particles.

[0076] The above technical solution can ensure that the support platform 4 is in a non-rotating state, or when the filler has been completely wetted, the second spray system is no longer needed to work, and only the first spray system is started. The absorption liquid in the accommodating chamber will not be lost quickly, thereby increasing the residence time of the absorption liquid in the accommodating chamber. Only when the filler layer needs to be wetted in advance before the equipment is used, the rotating support platform 4 can drive the cover 37 to rotate, and then generate centrifugal force until the centrifugal force is greater than the elastic force of the spring 39, so that the cover 37 opens an opening of the sleeve 34, allowing the absorption liquid to enter the temporary storage chamber through the opening and remain in the liquid storage tank 10 through the reflux pipe 41.

[0077] Working principle: When in use, the circulation pump 5 is started, and the circulation pump 5 draws the absorption liquid in the liquid storage tank 10 through the first liquid extraction pipe 6, and pumps the absorption liquid into the liquid sprinkling pipe 8 through the first liquid outlet pipe 7. The liquid sprinkling pipe 8 sprays the absorption liquid through the first nozzle 9 on the surface. The sprayed absorption liquid is sprinkled on the packing at the upper end of the support platform 4. The absorption liquid is sprinkled vertically on the upper end of the packing layer. Under the action of gravity, the absorption liquid gradually penetrates downward along the gaps in the packing and gradually spreads to fill all the gaps.

[0078] The driving motor 17 is started to drive the first belt pulley 18 to rotate. The first belt pulley 18 cooperates with the belt 20 to drive the second belt pulley 19 to rotate. The second belt pulley 19 drives the main pipe 13 to rotate. The main pipe 13 drives the second nozzle 29 and the support platform 4 to rotate together, so that the absorption liquid in the middle of the packing layer gradually diffuses outward under the action of centrifugal force, thereby improving the diffusion efficiency of the absorption liquid.

[0079] As the output shaft of the drive motor 17 rotates, the turntable 21 will be driven to rotate synchronously. The turntable 21 drives the piston 24 to reciprocate in the piston box 25 through the eccentric shaft 22 and the connecting rod 23. When the piston 24 gradually leaves the piston box 25, a negative pressure will be created in the piston box 25, thereby drawing the absorption liquid in the liquid storage tank 10 into the piston box 25 through the second liquid extraction pipe 26. When the piston 24 is gradually pressed into the piston box 25, a high pressure will be created in the piston box 25, thereby squeezing the absorption liquid in the piston box 25 into the main pipe 13 through the second liquid outlet pipe 27, and then squeezing the absorption liquid into the second nozzle 29 through the main pipe 13, and the absorption liquid is sprayed horizontally onto the packing layer through the second nozzle 29. Therefore, by spraying in two directions, combining internal and external spraying to spray the absorption liquid onto the packing layer, compared with single vertical spraying, the wetting efficiency of the packing layer can be effectively improved.

[0080] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0081] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wet scrubber comprising: Tower body (1); At least one support platform (4) for carrying fillers is provided in the tower body (1), the bottom end of the support platform (4) being hollowed out to allow exhaust gas to penetrate the support platform (4) and contact the fillers; a first spraying system provided in the tower body (1), the first spraying system comprising a plurality of first spraying heads (9) located above the support platform (4), the first spraying heads (9) being used to spray the absorption liquid onto the upper end of the filler along a first direction; Characterized in that, the wet scrubber further comprises: A second spraying system is provided in the tower body (1), the second spraying system comprising a plurality of second spray heads (29) embedded in the packing, the second spray heads (29) being used to spray the absorption liquid onto the packing from the inside of the packing along a second direction, the second direction intersecting the first direction so that the absorption liquids of two different directions meet and blend inside the packing layer and quickly wet the packing; The second spraying system comprises: a main pipe (13) with one end penetrating the middle of the support platform (4), the main pipe (13) being hollow inside to form a pipeline for the absorption liquid to flow, and a plurality of second spray heads (29) being arranged in a ring shape on the outer circumference of the main pipe (13) with the axis of the main pipe (13) as the center of the circle; The wet scrubber further comprises a driving structure, which is used to drive the support platform (4) to rotate around its center, so that the absorption liquid sprayed into the filler diffuses from the middle to the outside under the action of centrifugal force to fully wet the filler; The driving structure comprises: a top support (11) and a bottom support (16) respectively arranged at the top and bottom ends of the tower body (1); a bearing seat (12) connected to the top support (11) and the bottom support (16), wherein the bearing seat (12) cooperates with the main pipe (13); a driving motor (17) arranged at the lower end of the bottom support (16), wherein the output shaft of the driving motor (17) passes through the bottom support (16) and is connected to a first belt pulley (18); a second belt pulley (19) fixedly connected to the main pipe (13); and a belt (20) for connecting the first belt pulley (18) and the second belt pulley (19) in a transmission manner.

2. The wet scrubber according to claim 1, wherein: A liquid storage tank (10) for storing absorption liquid is provided at the bottom end of the tower body (1).

3. The wet scrubber according to claim 2, wherein: A filter plate (42) is provided at the upper end of the tower body (1) near the liquid storage tank (10).

4. The wet scrubber according to claim 2, wherein: The first spray system includes: a circulation pump (5) fixedly connected to the tower body (1); A first liquid outlet pipe (7) having one end connected to the water outlet of the circulation pump (5); a liquid sprinkling pipe (8) having one end connected to the other end of the first liquid outlet pipe (7), the other end of the liquid sprinkling pipe (8) passing through the side wall of the tower body (1) and extending into the tower body (1), a plurality of the first nozzles (9) being arranged at intervals along the length direction of the liquid sprinkling pipe (8), the spray holes of the first nozzles (9) being directed toward the support platform (4); A first liquid extraction pipe (6) has one end connected to the water inlet of the circulation pump (5), and the other end of the first liquid extraction pipe (6) passes through the tower body (1) and extends into the liquid storage tank (10).

5. The wet scrubber according to claim 2, wherein: The second spray system includes: A water supply structure having one end connected to the main pipe (13), wherein the water supply structure is used to pump the absorption liquid in the liquid storage tank (10) into the main pipe (13), so that the absorption liquid is sprayed toward the packing layer through the main pipe (13) and the second nozzle (29).

6. The wet scrubber according to claim 5, characterized in that The water supply structure includes: A piston box (25) fixedly arranged at the bottom end of the tower body (1); a second liquid extraction pipe (26) having one end connected to the piston box (25), and the other end of the second liquid extraction pipe (26) extending into the liquid storage tank (10); a second liquid outlet pipe (27) having one end connected to the piston box (25), and the other end of the second liquid outlet pipe (27) being rotatably connected to the main pipe (13); One-way valves provided in the second liquid extraction pipe (26) and the second liquid outlet pipe (27); a piston (24) movably disposed in the piston box (25); A connecting rod (23) having one end movably connected to the piston (24); A turntable (21) is connected to the output shaft of the drive motor (17), and an eccentric shaft (22) is provided on the turntable (21) and is rotatably engaged with the other end of the connecting rod (23).

7. The wet scrubber according to claim 6, wherein: The support platform (4) is provided with an outer wall and an inner wall extending along the length direction of the main pipe (13), the inner wall enclosing a mounting groove (15) for the main pipe (13) to pass through, and a accommodating chamber for accommodating a filler is formed between the outer wall and the inner wall, and one end of the second nozzle (29) passes through a through hole (30) provided on the surface of the inner wall.

8. The wet scrubber according to claim 7, wherein: The upper and lower ends of the outer side wall of the support platform (4) extend outward along the center to form a flange (31), and the flange (31), the tower body (1) and the outer side wall together form a temporary storage cavity for temporarily storing the absorption liquid. A through groove (33) is opened on the surface of the outer side wall, and the through groove (33) is used to guide the absorption liquid in the accommodating chamber into the temporary storage cavity. A return pipe (41) is provided on the outside of the tower body (1), one end of the return pipe (41) is connected to the temporary storage cavity, and the other end of the return pipe (41) is connected to the liquid storage tank (10).

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