White mud desulfurizing tower with defoaming function

Abstract

The invention discloses a white mud desulfurization tower with a defoaming function, which comprises a tower body, an exhaust port is arranged at the top of the tower body, a slurry tank is arranged at the bottom of the tower body, an air inlet is arranged between the slurry tank and the exhaust port, and a spray desulfurization module and a defoaming mechanism are also arranged in the tower body. Wherein the spraying and separating module is arranged between the air inlet and the air outlet, the defoaming mechanism is rotationally arranged in the tower body, a plurality of spraying holes are formed in the defoaming mechanism, an air inlet pipe is further arranged on the defoaming mechanism, and the air inlet pipe is connected with a steam pipe through a rotating joint; a driving device in power connection with the defoaming mechanism is further arranged on the defoaming mechanism, a slurry circulating module is further arranged on the tower body, the outlet end of the slurry circulating module is communicated with the spraying desulfurization module, and the inlet end of the slurry circulating module is communicated with the slurry tank; compared with the prior art, defoaming is achieved through water vapor sprayed out at a high speed, defoaming can be achieved without adding any agent, and the problem of secondary pollution caused by waste water, waste residues and the like in the prior art can be fundamentally solved.

Description

Technical Field

[0001] The present application relates to the technical field of chemical equipment, and in particular to a white mud desulfurization tower with a defoaming function. Background Art

[0002] The solid waste white mud generated in the papermaking and other fields is mainly composed of limestone. In theory, it can be desulfurized using the existing limestone desulfurization system. The actual application of engineering projects has also shown that the use of white mud for desulfurization is feasible.

[0003] However, due to the influence of active impurities in the white mud, foaming and overflow problems often occur in the absorption tower when using white mud for desulfurization, seriously affecting the normal operation of the unit; simple treatment measures such as directly adding defoaming agents to the desulfurization tower are currently the most common methods for dealing with foaming problems, but this method requires additional chemical agents during the treatment process, which is costly and will cause secondary pollution of wastewater and waste residues. Summary of the invention

[0004] The main purpose of the present application is to provide a white mud desulfurization tower with a defoaming function, aiming to solve the defect of the prior art that secondary pollution is prone to occur.

[0005] This application achieves the above objectives through the following technical solutions:

[0006] A white mud desulfurization tower with defoaming function, comprising a tower body;

[0007] An exhaust port, the exhaust port is arranged at the top of the tower body, an air inlet is arranged at the lower side of the exhaust port along the axial direction of the tower body, and a slurry pool is arranged at the lower side of the air inlet;

[0008] A spray desulfurization module, wherein the spray desulfurization module is arranged in the tower body and between the air inlet and the exhaust port along the flow direction of the tail gas to be desulfurized;

[0009] A defoaming mechanism, wherein the defoaming mechanism is rotatably arranged in the tower body, a plurality of injection holes are arranged on the defoaming mechanism, and an air inlet pipe is also arranged on the defoaming mechanism, and the air inlet pipe is connected to a steam pipe through a rotary joint;

[0010] A driving mechanism, the driving mechanism is connected to the defoaming mechanism by power, and the driving mechanism is used to drive the defoaming mechanism to rotate in the tower body;

[0011] A slurry circulation module, wherein the outlet end of the slurry circulation module is connected to the spray desulfurization module, and the inlet end of the slurry circulation module is connected to the slurry pool.

[0012] Optionally, the spray desulfurization module includes a spray layer, a primary demister and a secondary demister, and the spray layer, the primary demister and the secondary demister are arranged in sequence along the flow direction of the gas flow to be desulfurized.

[0013] Optionally, the spray layer includes a plurality of spray pipes, each of which is provided with a plurality of spray heads, and the spray pipes are arranged in sequence along the flow direction of the gas to be desulfurized; the spray direction of each spray head is opposite to the flow direction of the gas to be desulfurized.

[0014] Optionally, along the flow direction of the gas to be desulfurized, flushing pipes are provided on the upper and lower sides of the first-stage demister and the second-stage demister, and a plurality of flushing nozzles are provided on the flushing pipes, each of which is directly facing the first-stage demister or the second-stage demister.

[0015] Optionally, the defoaming mechanism includes a rotating frame, a floating plate for supporting the rotating frame on the surface of the slurry pool is provided at the bottom of the rotating frame; an air inlet pipe and a plurality of steam branches are provided on the rotating frame, each of the injection holes is respectively provided on each of the steam branches, and the air inlet pipe is respectively connected to each of the steam branches.

[0016] Optionally, the driving module includes a driving motor and a plurality of moving wheels, each of which is arranged on the rotating frame around the axis of the rotating frame, and each of the moving wheels is respectively in contact with the inner wall of the tower body; the driving motor and the moving wheels are connected to each other through a driving gear.

[0017] Optionally, the desulfurization tower further includes a first limiting ring and a second limiting ring, wherein the first limiting ring and the second limiting ring are respectively connected to the inner wall of the tower body, and the first limiting ring and the second limiting ring are respectively disposed on the upper side and the lower side of the rotating frame.

[0018] Optionally, the slurry circulation module includes a circulation pump, and a circulation pipe connected to the slurry pool is provided on the tower body, the circulation pipe is connected to the inlet end of the circulation pump, and the outlet end of the circulation pump is respectively connected to each of the spray pipes.

[0019] Optionally, an oxidation air pipe is further provided in the slurry pool, the inlet end of the oxidation air pipe extends outside the tower body, and the inlet end of the oxidation air pipe is also connected to an oxidation blower.

[0020] Optionally, a slurry discharge pipe connected to the slurry pool is also provided at the bottom of the tower body, and a slurry discharge pump is also connected to the outlet end of the slurry discharge pipe; a stirring paddle is also provided in the slurry pool, and a stirring motor connected to the power of the stirring paddle is provided on the tower body.

[0021] Compared with the prior art, this application has the following beneficial effects:

[0022] The present application includes a tower body, an exhaust port is arranged at the top of the tower body, a slurry pool is arranged at the bottom thereof, an air inlet is arranged between the slurry pool and the exhaust port, and a spray desulfurization module and a defoaming mechanism are also arranged in the tower body, wherein the spray separation module is arranged between the air inlet and the exhaust port, the defoaming mechanism is rotatably arranged in the tower body, a plurality of injection holes are arranged on the defoaming mechanism, an air inlet pipe is also arranged on the defoaming mechanism, and the air inlet pipe is connected to a steam pipe through a rotary joint; the defoaming mechanism is also provided with a driving device connected to its power, and a slurry circulation module is also arranged on the tower body, the outlet end of the slurry circulation module is connected to the spray desulfurization module, and the inlet end thereof is connected to the slurry pool;

[0023] When in use, the desulfurized gas enters the tower body from the air inlet, passes through the spray desulfurization module from bottom to top, and is discharged from the exhaust port. The spray desulfurization module realizes desulfurization by spraying the slurry drawn from the slurry pool; the slurry after desulfurization flows back to the slurry pool;

[0024] When the slurry is constantly bubbling during operation and the foam enters the area where the defoaming mechanism is located, external steam enters the defoaming mechanism through the air inlet pipe and is finally ejected through each ejection hole. The ejected steam will puncture the above foam, thereby achieving the purpose of defoaming.

[0025] Compared with the prior art, the present invention realizes defoaming by spraying water vapor at high speed. Compared with the method of adding chemical agents, the present invention can realize defoaming without adding any agents, which can fundamentally overcome the problem of secondary pollution such as wastewater and waste residue in the prior art;

[0026] At the same time, the steam used for defoaming can also be the excess steam in the factory, which has a wide source and reduces the operating cost of the equipment as much as possible;

[0027] Secondly, the present application can realize defoaming operation while the equipment is running, without the need to shut down the equipment, which is conducive to improving the operating efficiency of the equipment;

[0028] Finally, the present application can start the defoaming operation as soon as the foam reaches the warning value, thereby avoiding the accumulation of large amounts of foam and improving the operating quality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a white mud desulfurization tower with a defoaming function provided in Embodiment 1 of the present application;

[0030] Figure 2 It is a structural schematic diagram of the defoaming mechanism;

[0031] Figure 3 It is a structural schematic diagram of the steam branch pipe;

[0032] Figure markings: 1-tower body, 2-exhaust port, 3-air inlet, 4-slurry pool, 5-spray desulfurization module, 6-defoaming mechanism, 7-injection hole, 8-inlet pipe, 9-rotating joint, 10-steam pipe, 11-driving motor, 12-moving wheel, 13-driving gear, 14-first limiting ring, 15-second limiting ring, 16-circulating pump, 17-circulating pipe, 18-oxidation air pipe, 19-oxidation fan, 20-slurry discharge pipe, 21-slurry discharge pump, 22-stirring paddle, 23-stirring motor, 501-spray layer, 502-first stage demister, 503-second stage demister, 5011-spray pipe, 5012-spray head, 504-flushing pipe, 505-flushing nozzle, 601-rotating frame, 602-floating plate, 603-steam branch pipe.

[0033] The purpose, features and advantages of this application will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] Implementation Method 1

[0039] Reference Figures 1 to 3 This embodiment is an optional embodiment of the present application, which discloses a white mud desulfurization tower with a defoaming function, including a tower body 1;

[0040] An exhaust port 2 is provided at the top of the tower body 1, and the bottom of the tower body 1 is closed to form a slurry pool 4 for temporarily storing slurry;

[0041] An air inlet 3 is provided in the middle area of ​​the tower body 1. It should be noted that the air inlet 3 must always be located above the liquid level of the slurry pool 4. The air inlet 3 is connected to the gas source to be desulfurized.

[0042] A spray desulfurization module 5 and a defoaming mechanism 6 are also provided in the tower body 1, wherein the spray desulfurization module 5 includes a spray layer 501, a primary demister 502 and a secondary demister 503, and the spray layer 501, the primary demister 502 and the secondary demister 503 are arranged in sequence along the flow direction of the gas flow to be desulfurized;

[0043] The structures of the primary demister 502 and the secondary demister 503 are completely the same. At the same time, along the flow direction of the gas flow to be desulfurized, at least one flushing pipe 504 is provided on the upper and lower sides of the primary demister 502 and the secondary demister 503. A plurality of flushing nozzles 505 are provided on the flushing pipe 504. Each flushing nozzle 505 is directly facing the primary demister 502 or the secondary demister 503. For example, the flushing nozzle 505 on the flushing pipe 504 on the upper side of the primary demister 502 has a spraying direction that is vertically downward and directly facing the primary demister 502, and the flushing nozzle 505 on the flushing pipe 504 on the lower side of the primary demister 502 has a spraying direction that is vertically upward and directly facing the primary demister 502. The arrangement direction of the flushing nozzles 505 on the upper and lower sides of the secondary demister 503 is the same as that of the flushing nozzles 505 on the upper and lower sides of the primary demister 502.

[0044] Further, along the flow direction of the gas to be desulfurized, the spray layer 501 is arranged at the rear end of the spray desulfurization module 5, and the spray layer 501 includes a plurality of spray pipes 5011, each of which is provided with a plurality of spray heads 5012, and the spray pipes 5011 are arranged in sequence along the flow direction of the gas to be desulfurized; the spray direction of each spray head 5012 is opposite to the flow direction of the gas to be desulfurized, that is, the gas to be desulfurized moves in a vertically upward direction, while the spray direction of the spray head 5012 is vertically downward; the inlet end of each spray pipe 5011 is respectively connected to a spray water source;

[0045] It should be noted that the number of layers of the spray pipes 5011 is set to 3-7 layers according to actual conditions, the spacing between two adjacent layers of spray pipes 5011 is 1.8-2.2 meters, and the spacing between the top layer of the spray pipe 5011 and the primary demister 502 is 2.5-3.5 meters;

[0046] Furthermore, along the flow direction of the gas to be desulfurized, a porous plate is provided at the rear end of the spray layer 501, and the distance between the porous plate and the first-level spray pipe 5011 at the bottom is 1.8-2.2 meters;

[0047] Furthermore, a liquid holding layer is provided between the primary demister 502 and the secondary demister 503. It should be noted that the distance between the liquid holding layer and the primary demister is 1.8-2.5 meters. The liquid holding layer contains sodium hydroxide solution, which is a desulfurization device commonly used in desulfurization towers in the prior art.

[0048] The defoaming mechanism 6 is arranged at the lower part of the tower body 1, that is, the upper side of the defoaming mechanism 6 is the air inlet pipe 8, and the lower side thereof is the slurry pool 4; the defoaming mechanism 6 comprises a rotating frame 601, and the rotating frame 601 is a long strip truss structure as a whole, and a plurality of steam branch pipes 603 are arranged on the rotating frame 601, and the axis of each steam branch pipe 603 is parallel to the axis of the rotating frame 601; along the length direction of the rotating frame 601, each steam branch pipe 603 is arranged side by side;

[0049] A plurality of injection holes 7 are arranged on the outer circumference of each steam branch pipe 603; an air inlet pipe 8 is also arranged on the rotating frame 601, the axis of the air inlet pipe 8 coincides with the rotation axis of the rotating frame 601, the outlet end of the air inlet pipe 8 is respectively connected with each steam branch pipe 603, and a rotary joint 9 is also arranged at the inlet end of the air inlet pipe 8; a steam pipe 10 connected to an external steam source is also arranged on the tower body 1, and the steam pipe 10 is connected with the rotary joint 9;

[0050] A floating plate 602 is also provided at the bottom of the rotating frame 601, and the floating plate 602 is made of a plastic plate, a foam plate or the like;

[0051] The floating plate 602 can ensure that the entire defoaming mechanism 6 always floats on the top of the slurry, that is, the defoaming mechanism 6 is always in the area with the highest foam concentration, thereby ensuring the defoaming effect; and the above-mentioned arrangement has a simple structure and low cost, and can also ensure that the position of the defoaming mechanism 6 is automatically adjusted with the fluctuation of the liquid level;

[0052] Meanwhile, a driving module is also arranged on the rotating frame 601, and the driving module includes a driving motor 11 and a plurality of moving wheels 12. Each of the moving wheels 12 is rotatably arranged on the rotating frame 601 around the axis of the rotating frame 601, and each of the moving wheels 12 is respectively attached to the inner wall of the tower body 1; the driving motor 11 is connected to one of the moving wheels 12 by a driving gear 13;

[0053] By driving the motor 11, the rotating frame 601 can be ensured to rotate at a certain speed in the tower body 1. On the one hand, the rotation of the rotating frame 601 can realize the segmentation and destruction of the foam, thereby improving the defoaming efficiency; on the other hand, each steam branch pipe 603 will rotate synchronously with the rotating frame 601, thereby spraying water vapor in a throwing manner. The defoaming range of the water vapor is wider and the throwing radius is larger, which can effectively improve the defoaming efficiency and avoid a large number of defoaming dead corners.

[0054] The desulfurization tower further includes a first limiting ring 14 and a second limiting ring 15, both of which are in annular structures, and the outer circumferences of the first limiting ring 14 and the second limiting ring 15 are respectively connected to the inner wall of the tower body 1, and the first limiting ring 14 and the second limiting ring 15 are respectively disposed on the upper side and the lower side of the rotating frame 601;

[0055] The first limiting ring 14 and the second limiting ring 15 can limit the movement range of the defoaming mechanism 6 in the tower body 1 to avoid collision with other components on the upper and lower sides, thereby ensuring the safe operation of the equipment.

[0056] The bottom of the tower body 1 is a slurry pool 4 for storing slurry. The tower body 1 is also provided with a slurry circulation module, which includes a circulation pump 16. The tower body 1 is provided with a circulation pipe 17 connected to the slurry pool 4. The circulation pipe 17 is connected to the inlet end of the circulation pump 16, and the outlet end of the circulation pump 16 is respectively connected to each of the spray pipes 5011.

[0057] Through the above technical means, a complete slurry circulation process is formed in the tower body 1, thereby ensuring the stable operation of the equipment;

[0058] An oxidation air pipe 18 is also provided on the tower body 1, and an oxidation fan 19 is connected to the inlet end of the oxidation air pipe 18, and the outlet end thereof passes through the tower body 1 from the lower side of the defoaming mechanism 6 and is inserted into the slurry pool 4, and the outlet end thereof is open;

[0059] A large amount of air can be injected into the slurry pool 4 within a short period of time through the oxidation blower 19. On the one hand, the calcium sulfite in the slurry pool can be oxidized by the air. On the other hand, the air will generate a large number of bubbles in the slurry pool 4. The floating and bursting of the bubbles and the impact of the air will stir the slurry and avoid the generation of a large amount of precipitation at the bottom of the slurry pool 4, thereby ensuring the concentration of the slurry and improving the desulfurization effect.

[0060] Furthermore, a slurry discharge pipe 20 connected to the slurry pool 4 is provided at the bottom of the tower body 1, and a slurry discharge pump 21 is connected to the outlet end of the slurry discharge pipe 20;

[0061] During the operation of the equipment, the concentration of the slurry needs to be monitored. When the concentration of the slurry exceeds a preset value, the slurry in the slurry pool 4 can be quickly discharged through the slurry discharge pump 21, thereby achieving rapid replacement of the pressure reduction and improving the maintenance efficiency of the equipment.

[0062] At the same time, a stirring paddle 22 is also provided in the slurry pool 4, and a stirring motor 23 connected to the stirring paddle 22 is provided on the tower body 1;

[0063] The stirring action of the stirring paddle 22 can avoid sedimentation at the bottom of the slurry pool 4. On the one hand, it can avoid blockage of the circulation pump 16 and ensure the circulation flow of the slurry; on the other hand, it can ensure the concentration of the slurry, thereby ensuring the desulfurization effect of the slurry and ensuring the stable operation of the equipment.

[0064] When in use, the desulfurized gas enters the tower body from the air inlet, passes through the spray desulfurization module from bottom to top, and is discharged from the exhaust port. The spray desulfurization module realizes desulfurization by spraying the slurry drawn from the slurry pool; the slurry after desulfurization flows back to the slurry pool;

[0065] When the slurry is constantly bubbling during operation and the foam enters the area where the defoaming mechanism is located, external steam enters the defoaming mechanism through the air inlet pipe and is finally ejected through each ejection hole. The ejected steam will puncture the above foam, thereby achieving the purpose of defoaming.

[0066] Compared with the prior art, the present invention realizes defoaming by spraying water vapor at high speed. Compared with the method of adding chemical agents, the present invention can realize defoaming without adding any agents, which can fundamentally overcome the problem of secondary pollution such as wastewater and waste residue in the prior art;

[0067] At the same time, the steam used for defoaming can also be the excess steam in the factory, which has a wide source and reduces the operating cost of the equipment as much as possible;

[0068] Secondly, the present application can realize defoaming operation while the equipment is running, without the need to shut down the equipment, which is conducive to improving the operating efficiency of the equipment;

[0069] Finally, the present application can start the defoaming operation as soon as the foam reaches the warning value, thereby avoiding the accumulation of large amounts of foam and improving the operating quality of the equipment.

[0070] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A white mud desulfurization tower with defoaming function, characterized in that: The tower comprises a tower body (1); An exhaust port (2), the exhaust port (2) being arranged at the top of the tower body (1), an air inlet (3) being arranged below the exhaust port (2) along the axial direction of the tower body (1), and a slurry pool (4) being arranged below the air inlet (3); A spray desulfurization module (5), wherein the spray desulfurization module (5) is arranged in the tower body (1), and along the flow direction of the tail gas to be desulfurized, the spray desulfurization module (5) is arranged between the air inlet (3) and the exhaust port (2); A defoaming mechanism (6), the defoaming mechanism (6) is rotatably arranged in the tower body (1), a plurality of injection holes (7) are arranged on the defoaming mechanism (6), an air intake pipe (8) is also arranged on the defoaming mechanism (6), and the air intake pipe (8) is connected to a steam pipe (10) via a rotary joint (9); A driving mechanism, the driving mechanism being connected to the defoaming mechanism (6) by power, and the driving mechanism being used to drive the defoaming mechanism (6) to rotate in the tower body (1); A slurry circulation module, wherein the outlet end of the slurry circulation module is connected to the spray desulfurization module (5), and the inlet end of the slurry circulation module is connected to the slurry pool (4).

2. The white mud desulfurization tower with defoaming function according to claim 1 is characterized in that: The spray desulfurization module (5) comprises a spray layer (501), a primary demister (502) and a secondary demister (503), and the spray layer (501), the primary demister (502) and the secondary demister (503) are arranged in sequence along the flow direction of the gas flow to be desulfurized.

3. The white mud desulfurization tower with defoaming function according to claim 2 is characterized in that: The spray layer (501) comprises a plurality of spray pipes (5011), each of which is provided with a plurality of spray heads (5012). The spray pipes (5011) are arranged in sequence along the flow direction of the gas to be desulfurized; the spray direction of each spray head (5012) is opposite to the flow direction of the gas to be desulfurized.

4. The white mud desulfurization tower with defoaming function according to claim 2 is characterized in that: Along the flow direction of the gas to be desulfurized, flushing pipes (504) are provided on the upper and lower sides of the primary demister (502) and the secondary demister (503), and a plurality of flushing nozzles (505) are provided on the flushing pipes (504), and each of the flushing nozzles (505) is directly facing the primary demister (502) or the secondary demister (503).

5. The white mud desulfurization tower with defoaming function according to claim 1 is characterized in that: The defoaming mechanism (6) comprises a rotating frame (601), and a floating plate (602) for supporting the rotating frame (601) on the surface of a slurry pool (4) is arranged at the bottom of the rotating frame (601); an air intake pipe (8) and a plurality of steam branch pipes (603) are arranged on the rotating frame (601), and each of the injection holes (7) is respectively arranged on each of the steam branch pipes (603), and the air intake pipe (8) is respectively connected to each of the steam branch pipes (603).

6. The white mud desulfurization tower with defoaming function according to claim 5, characterized in that: The driving module comprises a driving motor (11) and a plurality of moving wheels (12). The moving wheels (12) are arranged on the rotating frame (601) around the axis of the rotating frame (601), and the moving wheels (12) are respectively fitted with the inner wall of the tower body (1); the driving motor (11) and the moving wheels (12) are connected in power via a driving gear (13).

7. A white mud desulfurization tower with defoaming function according to claim 5 or 6, characterized in that: The desulfurization tower further comprises a first limiting ring (14) and a second limiting ring (15), wherein the first limiting ring (14) and the second limiting ring (15) are respectively connected to the inner wall of the tower body (1), and the first limiting ring (14) and the second limiting ring (15) are respectively arranged on the upper side and the lower side of the rotating frame (601).

8. The white mud desulfurization tower with defoaming function according to claim 3, characterized in that: The slurry circulation module comprises a circulation pump (16); a circulation pipe (17) connected to the slurry pool (4) is arranged on the tower body (1); the circulation pipe (17) is connected to the inlet end of the circulation pump (16); and the outlet end of the circulation pump (16) is respectively connected to each of the spray pipes (5011).

9. The white mud desulfurization tower with defoaming function according to claim 1, characterized in that: An oxidation air pipe (18) is also provided in the slurry pool (4), the inlet end of the oxidation air pipe (18) extends outside the tower body (1), and the inlet end of the oxidation air pipe (18) is also connected to an oxidation fan (19).

10. The white mud desulfurization tower with defoaming function according to claim 1, characterized in that: A slurry discharge pipe (20) connected to the slurry pool (4) is also provided at the bottom of the tower body (1), and a slurry discharge pump (21) is also connected to the outlet end of the slurry discharge pipe (20); a stirring paddle (22) is also provided in the slurry pool (4), and a stirring motor (23) connected to the stirring paddle (22) is provided on the tower body (1).

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