Tail gas treatment device for urotropine production

Abstract

The utility model relates to the technical field of urotropine production, and discloses a tail gas treatment device for urotropine production, which comprises a treatment tank and a spraying assembly, a gas inlet pipe is arranged at the bottom of the front end of the treatment tank, a filler layer is fixedly mounted in the treatment tank, the spraying assembly comprises a conveying pipe I, a conveying pump and a spraying head I, and the conveying pipe I is communicated with the conveying pump. And the two ends of the first conveying pipe extend into the treatment tank correspondingly, one end of the first conveying pipe is located above the filler layer, and the other end of the first conveying pipe is located below the filler layer. According to the tail gas treatment device, impurities in the tail gas can be filtered and intercepted, the situation that the tail gas treatment working efficiency is reduced due to the fact that the arranged pump and the nozzle are blocked for a long time is avoided, and the tail gas treatment device has the advantages of being high in practicability and capable of filtering the impurities.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production technology field of urotropin, specifically to a tail gas treatment device for urotropin production. BACKGROUND

[0002] Urotropin is a white powdery crystalline substance, odorless and sweet, with a stimulating effect on the skin. Urotropin is flammable, and the combustion flame is colorless. Urotropin is widely used in the resin, plastic, rubber and other industries. Urotropin is formed by condensation of formaldehyde and ammonia in an alkaline solution. In actual production, in order to make the reaction proceed in the direction of generating urotropin, and to avoid the generation of side reactions and affect consumption, the amount of ammonia participating in the reaction is controlled to be excessive. Even if there is free ammonia in the reaction liquid, this can prevent reverse reactions and resist the generation of trimethylamine. Excessive ammonia will result in a large amount of ammonia gas in the production tail gas. If not recycled, it will not only pollute the environment, but also waste resources.

[0003] The utility model with publication number CN221693251U discloses a tail gas treatment device for urotropin production, which comprises an absorption tower and a spraying assembly arranged inside the absorption tower. The absorption tower is connected with a tail gas inlet pipe and a drain pipe. The top of the absorption tower is connected with an exhaust pipe. A plurality of wire mesh discs for filtering ammonia-containing liquid droplets are arranged between the exhaust pipe and the spraying assembly in the absorption tower. The wire mesh discs are uniformly distributed along the length direction of the absorption tower. The wire mesh discs are rotatably connected with the inner wall of the absorption tower. However, during use, no filter is arranged on the circulating spraying pipe and the liquid feeding spraying pipe. The absorption liquid directly passes through the pump and the spraying head during transportation. During long-term operation, impurities in the absorption liquid may cause the pump and the spraying head to be blocked, resulting in reduced production efficiency. Therefore, it is necessary to design a tail gas treatment device for urotropin production, which has strong practicability and can filter impurities. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a tail gas treatment device for urotropin production to solve the problems in the background art.

[0005] In order to solve the above technical problems, the utility model provides technical scheme as follows: A tail gas treatment device for methenamine production, including processing jar and spray subassembly, processing jar front end bottom is equipped with air inlet pipe, processing jar is fixedly installed with filler layer in, spray subassembly includes delivery pipe no.

[0006] According to the above technical scheme, the filter element includes a fixed cylinder, a threaded sleeve, an embedded block, a central passage, a clamping block, and a filter core, the threaded sleeve is threadedly connected outside the fixed cylinder, a flow-through groove is formed through the fixed cylinder, the embedded block is embeddedly installed in the flow-through groove, a central passage is formed through the embedded block, the clamping blocks are uniformly distributed at the bottom of the central passage, the filter core is located in the central passage, and the lower end of the filter core is in contact with the clamping blocks.

[0007] According to the above technical scheme, the embedded block includes a square block and an edge seat, the edge seat is fixedly installed at one end of the square block, an edge groove is formed on the outer wall of the fixed cylinder, and the edge seat is connected in the edge groove through magnet attraction.

[0008] According to the above technical scheme, the spray head one and the spray head two are the same structure and similar function, the spray head one includes an outer ring pipe, an inner ring pipe, a connecting pipe, and a nozzle, the outer ring pipe is arranged outside the inner ring pipe, the outer ring pipe and the inner ring pipe are connected through the connecting pipe, the connecting pipe is circumferentially and uniformly distributed between the outer ring pipe and the inner ring pipe, and the nozzles are uniformly distributed at the lower ends of the outer ring pipe and the inner ring pipe.

[0009] According to the technical scheme, the lower end of the wire mesh disc is provided with a fixing part, the fixing part comprises a fixing ring, movable columns and a limiting plate, the fixing ring is fixedly installed in the treatment tank, the movable columns are uniformly distributed on the fixing ring, the wire mesh disc is movably sleeved on the movable columns through a reciprocating lifting assembly, and the limiting plate is fixedly installed on the movable column.

[0010] According to the technical scheme, the reciprocating lifting assembly comprises a control motor, a half-tooth gear, a lifting plate, a lifting groove and a rack, the control motor is fixedly installed on the outer wall of the treatment tank, the output end of the control motor extends into the treatment tank and is fixedly installed with the half-tooth gear, the lifting plate is fixedly installed at the lower end of the wire mesh disc, the lifting plate is movably installed in the fixing ring, the lifting groove is formed in the lifting plate, the rack is symmetrically fixedly installed in the lifting groove, and the half-tooth gear can mesh with one end of the rack at the same time and can only mesh with one end of the rack at the same time.

[0011] Compared with the prior art, the application has the following beneficial effects:

[0012] (1) In the use process, the tail gas generated in the production process of urotropine is absorbed and treated by the treatment tank, and the basic absorption liquid containing ammonia gas is stored in the treatment tank, and the absorption liquid can be set according to the demand.

[0013] (2) The tail gas generated in the production process of urotropine is dissolved and absorbed by the basic absorption liquid, and the absorption liquid is circulated and sprayed by the spraying assembly, so that the ammonia gas is transported, the absorption liquid is transported to the spray head I by the pump, and the absorption liquid is uniformly sprayed on the filler layer by the spray head I, the filler layer increases the gas-liquid contact area, improves the mass transfer efficiency, and improves the absorption efficiency of the ammonia gas.

[0014] (3) In the tail gas treatment process, heat is released during the absorption of the absorption liquid, and the absorption liquid is cooled to maintain the appropriate absorption temperature, the outlet pipe is connected with the external heat exchanger, and the absorption liquid is cooled and circulated by the outlet pipe and the circulating assembly to maintain the appropriate absorption temperature of the absorption liquid.

[0015] (4) In the flowing process of the absorption liquid, the flowing absorption liquid in the delivery pipe I, the delivery pipe II and the outlet pipe is filtered by the filter core, the impurities in the absorption liquid can be filtered and retained, the pump and the nozzle can be prevented from being blocked for a long time, and the working efficiency of the tail gas treatment is reduced, the filter core can be conveniently disassembled and replaced, the edge seat is made of sealing rubber impurities, the flow-through groove is sealed by the edge seat to avoid leakage during the flowing process, the magnet can further increase the convenience of the embedded block installation, the threaded sleeve is conveniently screwed and fixed, and the anti-falling effect is achieved.

[0016] (5) Before the purified gas is discharged, liquid droplets carried in the gas are intercepted and removed through the set wire mesh disc, secondary pollution is avoided, environmental pollution is reduced, loss of the absorption liquid is reduced, the wire mesh disc can be conveniently installed and fixed through the setting of the fixed ring, the movable column and the limiting plate, the displacement of the movable column is guided and limited through the movable column, the wire mesh disc is driven to reciprocatingly lift through the reciprocating lifting assembly, the wire mesh disc is shaken up and down, liquid droplets on the upper end of the wire mesh disc are caused to drop, and the processing efficiency of the wire mesh disc on the liquid droplets is accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and serve to explain the present application, and do not constitute a limitation of the present application. In the drawings:

[0018] Figure 1 is the first three-dimensional schematic view of the present application;

[0019] Figure 2 is the second three-dimensional schematic view of the present application;

[0020] Figure 3 is the third three-dimensional schematic view of the present application;

[0021] Figure 4 is the partial sectional view of the present application;

[0022] Figure 5 is the front view of the present application;

[0023] Figure 6 is the sectional view of the present application in the A direction; Figure 5 is the sectional view of the present application in the B direction;

[0024] Figure 7 is the sectional view of the present application in the B direction; Figure 5 is the sectional view of the present application in the B direction;

[0025] Figure 8 is the three-dimensional schematic view of the embedded block of the present application;

[0026] In the figure: 1 - processing tank, 2 - spray assembly, 21 - delivery pipe one, 22 - delivery pump, 23 - spray head one, 231 - outer ring pipe, 232 - inner ring pipe, 233 - connecting pipe, 234 - nozzle, 3 - air inlet pipe, 4 - filler layer, 5 - liquid outlet pipe, 6 - circulating assembly, 61 - delivery pipe two, 62 - delivery pipe three, 63 - delivery pipe four, 64 - spray head two, 7 - filter piece, 71 - fixed cylinder, 72 - threaded sleeve, 73 - embedded block, 731 - square block, 732 - edge seat, 74 - central passage, 75 - clamping block, 76 - filter core, 8 - wire mesh disc, 9 - fixing piece, 91 - fixing ring, 92 - movable column, 93 - limiting plate, 10 - reciprocating lifting assembly, 101 - control motor, 102 - half-tooth gear, 103 - lifting plate, 104 - lifting groove, 105 - rack. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] Please refer to Figures 1-8 The utility model provides technical scheme: a tail gas treatment device for urotropine production, including processing tank 1 and spray assembly 2, the processing tank 1 front end bottom is equipped with air inlet pipe 3, the processing tank 1 is fixedly installed with filler layer 4 in, spray assembly 2 includes delivery pipe one 21 and delivery pump 22 and spray head one 23, the delivery pipe one 21 both ends respectively extend to processing tank 1, the delivery pipe one 21 one end is located above filler layer 4 and the other end is located below filler layer 4, delivery pump 22 is fixedly installed on the lateral wall of processing tank 1 and is arranged on the delivery pipe one 21, the processing tank 1 rear end bottom is equipped with liquid outlet pipe 5, the lateral wall of processing tank 1 is equipped with circulating assembly 6, circulating assembly 6 includes delivery pipe two 61, delivery pipe three 62, delivery pipe four 63 and spray head two 64, the delivery pipe two 61 is connected with delivery pipe three 62 and delivery pipe four 63 respectively through three-way valve, the delivery pipe three 62 terminal end extends to processing tank 1 and is located below filler layer 4, the delivery pipe four 63 terminal end extends to processing tank 1 and is fixedly installed with spray head two 64, spray head two 64 is located above spray head one 23, the delivery pipe one 21 and the delivery pipe two 61 and the liquid outlet pipe 5 are equipped with filter piece 7 respectively, the processing tank 1 is equipped with wire mesh disc 8, wire mesh disc 8 is located above spray head two 64;

[0029] In use, the application absorbs and processes the tail gas generated in the production of urotropine by the treatment tank 1. The treatment tank 1 stores ammonia-based absorption liquid. The most commonly used absorption liquid is water. Because ammonia has high solubility in water, in order to improve absorption efficiency, alkaline solutions such as sodium hydroxide or potassium hydroxide can also be used. These alkaline solutions can chemically react with ammonia to form stable salts, further improving absorption efficiency. According to requirements, it can be set as needed;

[0030] The tail gas generated in the production of urotropine is connected with the gas inlet pipe 3 and enters the bottom of the treatment tank 1 through the gas inlet pipe 3. The ammonia is dissolved and absorbed by the basic absorption liquid, and at the same time, the absorption liquid at the bottom is circulated and sprayed by the spraying assembly 2. The delivery pump 22 delivers the absorption liquid to the spray head 1 23, which uniformly sprays on the filler layer 4. The filler layer 4 increases the gas-liquid contact area and improves the mass transfer efficiency. It is a common technical means in the technical field and can be set as needed according to requirements. Here, it is not described in detail.

[0031] During the tail gas treatment process, heat is released during the absorption of the absorption liquid. The absorption liquid is cooled to maintain the appropriate absorption temperature. The liquid outlet pipe 5 is connected to the external heat exchanger. The absorption liquid is extracted through the liquid outlet pipe 5 and uniformly sprayed by the circulation assembly 6 after the cooling zone. It is re-delivered to the treatment tank 1. The delivery pipe 2 61 is connected to the external liquid storage tank. The absorption liquid after heat exchange by the heat exchanger is stored in the liquid storage tank for convenient delivery by the delivery pipe 2 61. The delivered absorption liquid is partly delivered to the spray head 2 64 through the delivery pipe 3 62 and sprayed by the spray head 2 64. The other part is re-delivered to the treatment tank 1 through the delivery pipe 4 63.

[0032] During the flow of the absorption liquid, the filter 7 filters the flowing absorption liquid to prevent impurities carried therein from polluting the pump and nozzle. Long-term pollution can cause blockage and affect normal tail gas treatment work, delaying the work efficiency of tail gas treatment.

[0033] Before the purified gas is discharged, the wire mesh disc 8 is set to intercept and remove the liquid droplets carried in the gas to avoid secondary pollution, reduce environmental pollution, and reduce the loss of absorption liquid.

[0034] Specifically, the filter 7 comprises a fixed cylinder 71, a threaded sleeve 72, an embedded block 73, a central passage 74, a clamping block 75, and a filter core 76, the threaded sleeve 72 is threadedly connected outside the fixed cylinder 71, the fixed cylinder 71 is provided with a flow passage through the inside, the embedded block 73 is embeddedly installed in the flow passage, the embedded block 73 is provided with the central passage 74 through the inside, the clamping block 75 is uniformly distributed at the bottom of the central passage 74, and the filter core 76 is located in the central passage 74 and in contact with the clamping block 75 at the lower end;

[0035] The filter core 76 filters the impurities in the absorption liquid flowing through the conveying pipe one 21, the conveying pipe two 61, and the liquid outlet pipe 5, avoids the long-time blockage of the pump and the nozzle, reduces the working efficiency of the tail gas treatment, and facilitates the replacement of the filter core 76.

[0036] Specifically, the embedded block 73 comprises a square block 731 and an edge seat 732, the edge seat 732 is fixedly installed at one end of the square block 731, the outer wall of the fixed cylinder 71 is provided with an edge groove, and the edge seat 732 is connected in the edge groove through the magnet 77.

[0037] The edge seat 732 is made of sealing rubber impurities, seals the flow passage through the edge seat 732, avoids leakage during the flowing process, and further increases the convenience of the installation of the embedded block 73 through the magnet 77, facilitates the screwing of the threaded sleeve 72, and plays a role of anti-falling.

[0038] Specifically, the spray head one 23 and the spray head two 64 are the same in structure and similar in function, the spray head one 23 comprises an outer ring pipe 231, an inner ring pipe 232, a connecting pipe 233, and a nozzle 234, the outer ring pipe 231 is arranged outside the inner ring pipe 232, the outer ring pipe 231 and the inner ring pipe 232 are connected and communicated through the connecting pipe 233, the connecting pipe 233 is circumferentially and uniformly distributed between the outer ring pipe 231 and the inner ring pipe 232, and the nozzles 234 are uniformly distributed at the lower ends of the outer ring pipe 231 and the inner ring pipe 232.

[0039] The spray head one 23 and the spray head two 64 are the same in structure and similar in function, and are composed of the outer ring pipe 231, the inner ring pipe 232, the connecting pipe 233, and the nozzle 234, the outer ring pipe 231 and the inner ring pipe 232 can effectively distribute the nozzles 234 in the treatment tank 1, facilitate the uniform spraying of the nozzles 234, and improve the ammonia gas absorption treatment effect.

[0040] Specifically, the lower end of the wire mesh disc 8 is provided with a fixing part 9, the fixing part 9 comprises a fixed ring 91, movable columns 92 and a limiting plate 93, the fixed ring 91 is fixedly installed in the treatment tank 1, the movable columns 92 are uniformly distributed on the fixed ring 91, the wire mesh disc 8 is movably sleeved on the movable columns 92 through a reciprocating lifting assembly 10, and the limiting plate 93 is fixedly installed on the movable columns 92.

[0041] Through the arrangement of the fixed ring 91, the movable columns 92 and the limiting plate 93, the wire mesh disc 8 can be conveniently installed and fixed, the displacement of the movable columns 92 is guided and limited through the movable columns 92, the wire mesh disc 8 is driven to reciprocatingly lift through the reciprocating lifting assembly 10, the wire mesh disc 8 is shaken up and down, and then the liquid drops at the upper end of the wire mesh disc 8 are caused to drop, and the processing efficiency of the wire mesh disc 8 on the liquid drops is improved.

[0042] Specifically, the reciprocating lifting assembly 10 comprises a control motor 101, a half-tooth gear 102, a lifting plate 103, a lifting groove 104 and a rack 105, the control motor 101 is fixedly installed on the outer wall of the treatment tank 1, the output end of the control motor 101 extends into the treatment tank 1 and is fixedly installed with the half-tooth gear 102, the lifting plate 103 is fixedly installed at the lower end of the wire mesh disc 8, the lifting plate 103 is movably installed in the fixed ring 91, the lifting groove 104 is arranged in the lifting plate 103, the rack 105 is fixedly installed in the lifting groove 104 in a symmetrical manner, and the half-tooth gear 102 can mesh with one end of the rack 105 at the same time and can only mesh with one end of the rack 105.

[0043] The control motor 101 is externally provided with a control end electrically connected, the control motor 101 is controlled through the external control end, the reciprocating lifting movement of the lifting plate 103 can be realized through the meshing of the half-tooth gear 102 and the rack 105, the reciprocating lifting movement of the wire mesh disc 8 can be driven, the liquid drops at the upper end of the wire mesh disc 8 are caused to drop, the processing efficiency of the liquid drops is improved, and the working efficiency is improved.

[0044] Working principle: in the use process of the application, the tail gas generated in the production process of urotropine is absorbed and treated through the treatment tank 1, the treatment tank 1 stores the ammonia-based absorption liquid, the most commonly used absorption liquid is water, because ammonia has a high solubility in water, in order to improve the absorption efficiency, an alkaline solution such as sodium hydroxide or potassium hydroxide can also be used, the alkaline solution can react with ammonia to form stable salts, and the absorption effect is further improved, and the setting can be adapted according to the requirements;

[0045] The tail gas generated in the production process of urotropin is connected with the gas inlet pipe 3, enters the bottom of the treatment tank 1 through the gas inlet pipe 3, and is dissolved and absorbed by the base absorption liquid. At the same time, the absorption liquid at the bottom is circulated and sprayed by the spraying assembly 2. The delivery pump 22 delivers the absorption liquid to the spraying head I 23, which uniformly sprays on the filler layer 4. The filler layer 4 increases the gas-liquid contact area and improves the mass transfer efficiency, which is a common technical means in the technical field and can be set according to the requirements. Therefore, it will not be described in detail here.

[0046] During the tail gas treatment process, heat is released during the absorption process of the absorption liquid. The absorption liquid is cooled to maintain the appropriate absorption temperature. The liquid outlet pipe 5 is connected with the external heat exchanger. The absorption liquid is extracted through the liquid outlet pipe 5 and uniformly sprayed by the circulating assembly 6 after the cooling zone. The absorption liquid is re-delivered to the treatment tank 1. The delivery pipe II 61 is connected with the external liquid storage tank. The absorption liquid after heat exchange in the heat exchanger is stored in the liquid storage tank for convenient delivery of the delivery pipe II 61. The delivered absorption liquid is partly delivered to the spraying head II 64 through the delivery pipe III 62 and sprayed by the spraying head II 64. The other part is re-delivered to the treatment tank 1 through the delivery pipe IV 63.

[0047] During the flow process of the absorption liquid, the filter core 76 filters the flowing absorption liquid in the delivery pipe I 21, the delivery pipe II 61 and the liquid outlet pipe 5, respectively, so as to filter and retain the impurities therein, avoid the long-term blockage of the set pump and nozzle, and thus reduce the working efficiency of the tail gas treatment. The filter core 76 can be conveniently disassembled and replaced. By unscrewing the threaded sleeve 72, the embedded block 73 inside can be taken out, and the filter core 76 inside can be replaced. When the filter core 76 is installed, the lower end of the clamping block 75 is abutted and fixed. The edge seat 732 can be made of sealing rubber impurities. The flow-through groove is sealed by the edge seat 732 to avoid leakage during the flow process. The magnet 77 can further increase the convenience of installation of the embedded block 73, facilitate the screwing and fixing of the threaded sleeve 72, and play a role in preventing falling off.

[0048] Before the purified gas is discharged, the liquid droplets carried in the gas are intercepted and removed by the set wire mesh disc 8, so as to avoid causing secondary pollution, reduce the environmental pollution, and reduce the loss of the absorption liquid. The fixed ring 91, the movable column 92 and the limiting plate 93 are set to conveniently install and fix the wire mesh disc 8. The displacement of the movable column 92 is guided and limited by the movable column 92. The wire mesh disc 8 is driven by the reciprocating lifting assembly 10 to reciprocate and vibrate up and down, so as to promote the liquid droplets on the upper end of the wire mesh disc 8 to drop and accelerate the processing efficiency of the wire mesh disc 8 to the liquid droplets.

[0049] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0050] Finally, it should be noted that the above-described embodiments are merely possible embodiments of the present application, and thus are not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can still be modified or equivalent replaced by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tail gas treatment device for urotropine production, comprising a treatment tank (1) and a spray assembly (2), characterized in that: The processing tank (1) has an air inlet pipe (3) at the bottom front end. A packing layer (4) is fixedly installed inside the processing tank (1). The spray assembly (2) includes a first conveying pipe (21), a conveying pump (22), and a first spray head (23). The two ends of the first conveying pipe (21) extend into the processing tank (1). One end of the first conveying pipe (21) is located above the packing layer (4), and the other end is located below the packing layer (4). The conveying pump (22) is fixedly installed on the side wall of the processing tank (1) and is located on the first conveying pipe (21). The processing tank (1) has a liquid outlet pipe (5) at the bottom rear end. The processing tank (1) has a circulation assembly (6) on the side wall. The circulation assembly (6) includes a second conveying pipe (61) and a third conveying pipe. (62), delivery pipe four (63) and spray head two (64), delivery pipe two (61) is connected to delivery pipe three (62) and delivery pipe four (63) respectively through a three-way valve, delivery pipe three (62) extends into the treatment tank (1) and is located below the packing layer (4), delivery pipe four (63) extends into the treatment tank (1) and is fixedly installed with spray head two (64), spray head two (64) is located above spray head one (23), and filter elements (7) are respectively provided on delivery pipe one (21), delivery pipe two (61) and liquid outlet pipe (5), and wire mesh disc (8) is provided in the treatment tank (1), and wire mesh disc (8) is located above spray head two (64).

2. The tail gas treatment device for urotropine production according to claim 1, characterized in that: The filter element (7) includes a fixed cylinder (71), a threaded sleeve (72), an embedded block (73), a central channel (74), a locking block (75), and a filter element (76). The threaded sleeve (72) is threaded to the outside of the fixed cylinder (71). A flow groove is provided through the fixed cylinder (71). The embedded block (73) is embedded in the flow groove. A central channel (74) is provided through the embedded block (73). The locking blocks (75) are evenly distributed at the bottom of the central channel (74). The filter element (76) is located in the central channel (74). The lower end of the filter element (76) is in contact with the locking block (75).

3. The tail gas treatment device for urotropine production according to claim 2, characterized in that: The embedded block (73) includes a block (731) and an edge seat (732). The edge seat (732) is fixedly installed at one end of the block (731). The outer wall of the fixed cylinder (71) is provided with an edge groove. The edge seat (732) is attracted and connected to the edge groove by a magnet (77).

4. The tail gas treatment device for urotropine production according to claim 1, characterized in that: The first spray head (23) and the second spray head (64) have the same structure and similar functions. The first spray head (23) includes an outer ring pipe (231), an inner ring pipe (232), a connecting pipe (233), and nozzles (234). The outer ring pipe (231) is located outside the inner ring pipe (232). The outer ring pipe (231) and the inner ring pipe (232) are connected by the connecting pipe (233). The connecting pipe (233) is evenly distributed in a circle between the outer ring pipe (231) and the inner ring pipe (232). The nozzles (234) are evenly distributed at the lower ends of the outer ring pipe (231) and the inner ring pipe (232).

5. The tail gas treatment device for urotropine production according to claim 1, characterized in that: The lower end of the wire mesh reel (8) is provided with a fixing member (9), which includes a fixing ring (91), a movable column (92), and a limiting plate (93). The fixing ring (91) is fixedly installed inside the processing tank (1). The movable column (92) is evenly distributed on the fixing ring (91). The wire mesh reel (8) is movably sleeved on the movable column (92) through a reciprocating lifting assembly (10). The limiting plate (93) is fixedly installed on the movable column (92).

6. The tail gas treatment device for urotropine production according to claim 5, characterized in that: The reciprocating lifting assembly (10) includes a control motor (101), a half-tooth gear (102), a lifting plate (103), a lifting groove (104), and a rack (105). The control motor (101) is fixedly installed on the outer wall of the processing tank (1). The output end of the control motor (101) extends into the processing tank (1) and is fixedly installed with the half-tooth gear (102). The lifting plate (103) is fixedly installed at the lower end of the wire mesh disc (8). The lifting plate (103) is movably installed through the fixing ring (91). The lifting groove (104) is opened in the lifting plate (103). The rack (105) is symmetrically fixedly installed in the lifting groove (104). The half-tooth gear (102) can only mesh with one end of the rack (105) at the same time.

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