A tail gas recovery device for nitrochlorobenzene production

Abstract

This invention discloses a tail gas recovery device for nitrochlorobenzene production, relating to the field of nitrochlorobenzene production technology. It includes a treatment chamber with an inlet pipe connected to one side of its bottom and an exhaust pipe connected to its top. A piston plate is installed inside the treatment chamber, and an electric telescopic rod is connected to one side of the chamber. A first lifting rod is connected to the telescopic end of the electric telescopic rod and is connected to the piston plate. Multiple atomizing nozzles are distributed laterally at equal intervals on the bottom of the piston plate. The tail gas generated during nitrochlorobenzene processing enters the treatment chamber through the inlet pipe. The atomizing nozzles on the piston plate spray the tail gas with a reaction liquid, facilitating the elimination of harmful substances in the tail gas. During this process, the piston plate also descends, compressing the tail gas and atomized liquid within the treatment chamber, ensuring sufficient contact and reaction within a smaller space, thereby improving the treatment effect.

Description

Technical Field

[0001] This invention relates to the field of nitrochlorobenzene production technology, and more specifically to a tail gas recovery device for nitrochlorobenzene production. Background Technology

[0002] Dinitrochlorobenzene is an organic compound mainly used as a raw material for the synthesis of dyes, pesticides, and pharmaceuticals. During the production of dinitrochlorobenzene, a certain amount of exhaust gas is emitted. This exhaust gas contains harmful substances and needs to be treated by exhaust gas treatment equipment to reduce environmental pollution.

[0003] The Chinese patent authorization announcement number is CN217698498U, entitled "A tail gas treatment device for the production process of 2,4-dinitrochlorobenzene". It includes a spray tower and a tail gas inlet. A gas input pipe is connected to the lower left side of the spray tower. A spray pipe is installed inside the spray tower. This scheme relies on the gas input pipe to introduce the tail gas into the spray tower, and then relies on the spray pipe to spray out the corresponding atomized solution to spray the tail gas, thereby achieving the treatment of the tail gas.

[0004] The shortcomings of the above-mentioned existing technical solutions are as follows: Although the above solutions can spray the exhaust gas, it is impossible to ensure that the exhaust gas and the spray atomized solution fully contact and react after the exhaust gas enters the spray tower. Some of the exhaust gas can easily rise directly, pass through the location of the spray pipe assembly, and then be discharged from the gas output pipe. This will result in some harmful substances in the exhaust gas being discharged directly without being treated, that is, the exhaust gas treatment effect is not good enough. Summary of the Invention

[0005] The purpose of this invention is to provide a tail gas recovery device for nitrochlorobenzene production, so as to solve the technical problem that the tail gas treatment device for nitrochlorobenzene production in the prior art cannot fully contact and react with the spray solution, resulting in poor treatment effect.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution:

[0007] A tail gas recovery device for nitrochlorobenzene production includes a treatment box, an inlet pipe connected to one side of the bottom of the treatment box, and an exhaust pipe connected to the top of the treatment box.

[0008] The processing box is equipped with a piston plate inside. An electric telescopic rod is connected to one side of the processing box. A first lifting rod is connected to the telescopic end of the electric telescopic rod. The first lifting rod passes through the bottom of the processing box and is connected to the piston plate. Multiple atomizing nozzles are distributed horizontally and equidistantly at the bottom of the piston plate. A spray drive assembly that cooperates with the atomizing nozzles is provided on the top of the processing box.

[0009] A lifting partition plate is slidably inserted at one end of the air intake pipe near the processing box, and a linkage lifting mechanism is provided between the lifting partition plate and the telescopic end of the electric telescopic rod.

[0010] The piston plate has multiple strip-shaped air leakage holes evenly spaced. Each strip-shaped air leakage hole has a strip-shaped groove on both inner walls. A connecting block that slides through the strip-shaped groove is provided inside the strip-shaped air leakage hole. A return spring is connected inside the strip-shaped groove. A sealing plate that cooperates with the strip-shaped air leakage hole is connected above the connecting block. A push rod is rotatably connected to the bottom of the connecting block. A disc spring is connected between the rotating end of the push rod and the connecting block. A limit baffle is connected to the push rod near the bottom of the strip-shaped air leakage hole, and the limit baffle cooperates with the bottom of the strip-shaped air leakage hole. A compression linkage assembly is provided between each push rod and the bottom of the processing box.

[0011] As a further aspect of the present invention: the extrusion linkage assembly includes an extrusion ball and a limiting top post, the extrusion ball is connected to a top rod, and the limiting top post is located near the bottom of the processing box, and the limiting top post cooperates with the extrusion ball.

[0012] As a further aspect of the present invention: two extrusion balls are provided, and the two extrusion balls are symmetrically distributed near the bottom end of the top rod; two limiting top posts are provided, and the two limiting top posts are respectively aligned with the bottom of the corresponding extrusion ball at a position away from the center of the ball.

[0013] As a further aspect of the present invention: a storage tank is provided at the bottom of the processing box, a drain valve that cooperates with the storage tank is provided on one side of the bottom of the processing box, a liquid level sensor is provided on the inner wall of the processing box near the storage tank, and an alarm that is electrically connected to the liquid level sensor is connected to the outer wall of the processing box.

[0014] As a further aspect of the present invention: the spray driving assembly includes a liquid storage tank and a corrugated telescopic pipe. The liquid storage tank is located on the top of the processing tank, and a pump body is provided on the liquid storage tank. The liquid outlet end of the pump body is connected to one end of the corrugated telescopic pipe, and the other end of the corrugated telescopic pipe passes through the top of the processing tank. Each atomizing nozzle is connected to the bottom end of the corrugated telescopic pipe.

[0015] As a further aspect of the present invention: a transition pipe is connected to the top of the processing box, and the corrugated expansion pipe cooperates with the transition pipe.

[0016] As a further embodiment of the present invention: the linkage lifting mechanism includes a second lifting rod and a connecting guide sleeve, the connecting guide sleeve being connected above the lifting partition plate, the second lifting rod being connected to the other side of the telescopic end of the electric telescopic rod, and the second lifting rod passing through the connecting guide sleeve; a limit spring is connected between the second lifting rod and the connecting guide sleeve.

[0017] As a further aspect of the present invention: the length of the limiting baffle is greater than the width of the strip-shaped air leakage hole, but less than the length of the strip-shaped air leakage hole.

[0018] The beneficial effects of this invention are:

[0019] 1. The exhaust gas generated during the processing of nitrochlorobenzene in this invention enters the treatment chamber through the air inlet pipe. The atomizing nozzles distributed on the piston plate in the treatment chamber spray the exhaust gas with the reaction liquid, which helps to eliminate harmful substances in the exhaust gas. During this process, the piston plate also moves downward to compress the exhaust gas and atomized liquid in the treatment chamber, so that the two are confined to a small space to fully contact and react, thereby improving the treatment effect.

[0020] 2. During the descent of the piston plate, the distributed push rods are restricted to the bottom of the strip-shaped vent hole by the limiting baffle, which prevents the piston plate from compressing the exhaust gas and causing the gas pressure to rise and open the sealing plate above the push rod. Only when the piston plate descends to a certain position, the extrusion balls distributed on the push rod first compress the limiting push column distributed at the bottom of the processing box, causing the push rod to rotate. This causes the limiting baffle to rotate and disengage from the limiting position. Then, the bottom end of the push rod touches the bottom of the processing box and pushes up the sealing plate above the strip-shaped vent hole by compression, so that the exhaust gas after compression reaction can pass through and be discharged, which is convenient for subsequent exhaust gas treatment.

[0021] 3. When the piston plate of the present invention descends and compresses the exhaust gas entering the treatment box by the contraction of the electric telescopic rod, the electric telescopic rod also drives the set lifting partition plate to descend and block the air inlet pipe, so as to prevent the exhaust gas from flowing back into the air inlet pipe during the compression process. After the lifting partition plate descends and blocks the air inlet pipe, the connecting guide sleeve above it and the second lifting rod can cause the connected limit spring to be compressed and continue to slide relative to each other, so as to avoid hindering the electric telescopic rod from driving the piston plate to continue to descend. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0025] Figure 3 This is a bottom view of the structure in which the strip-shaped air leakage hole, the limiting baffle, and the piston plate are connected in cooperation in this invention;

[0026] Figure 4 This is a bottom view schematic diagram of the structure in which the extrusion ball and the limiting top column cooperate in this invention;

[0027] Figure 5This is a schematic diagram of the structure in this invention where the sealing plate rises and opens relative to the strip-shaped air leakage hole.

[0028] In the diagram: 1. Processing box; 2. Exhaust pipe; 3. Inlet pipe; 4. Drain valve; 5. Storage tank; 6. Limiting top column; 7. Liquid level sensor; 8. Lifting partition plate; 9. Connecting guide sleeve; 10. Limiting spring; 11. Second lifting rod; 12. Electric telescopic rod; 13. First lifting rod; 14. Piston plate; 15. Atomizing nozzle; 16. Liquid storage tank; 17. Pump body; 18. Corrugated telescopic pipe; 19. Transition pipe; 20. Strip-shaped air leakage hole; 21. Limiting baffle; 22. Squeezing ball; 23. Top rod; 24. Connecting block; 25. Sealing plate; 26. Strip-shaped chute; 27. Return spring; 28. Disc spring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1-5 As shown, a tail gas recovery device for nitrochlorobenzene production includes a treatment box 1. An air inlet pipe 3 is connected to one side of the bottom of the treatment box 1. The air inlet pipe 3 is used to connect to the tail gas emission end of the nitrochlorobenzene production equipment and to guide the tail gas into the treatment box 1. An exhaust pipe 2 is connected to the top of the treatment box 1 and is used to discharge the tail gas after reaction treatment from the treatment box 1.

[0031] The treatment chamber 1 is equipped with a piston plate 14. An electric telescopic rod 12 is connected to one side of the treatment chamber 1. A first lifting rod 13 is connected to the telescopic end of the electric telescopic rod 12. The first lifting rod 13 passes through the bottom of the treatment chamber 1 and is connected to the piston plate 14. When the electric telescopic rod 12 reciprocates, it can drive the piston plate 14 to slide up and down inside the treatment chamber 1 through the first lifting rod 13. Multiple atomizing nozzles 15 are distributed horizontally and equidistantly at the bottom of the piston plate 14. A spray driving assembly is provided on the top of the treatment chamber 1 and is connected to the atomizing nozzles 15. The spray driving assembly includes a liquid storage tank 16 and a corrugated telescopic pipe 18. The liquid storage tank 16 is located on the top of the treatment chamber 1 and contains a solution that can react with harmful substances in the exhaust gas. A pump body 17 is installed on the liquid storage tank 16, and the inlet end of the pump body 17 is connected to the liquid storage tank 16. The bottom of the pump body 17 is connected to the liquid outlet of the pump body 17, which is connected to one end of the corrugated telescopic tube 18. The other end of the corrugated telescopic tube 18 passes through the top of the treatment box 1. Each atomizing nozzle 15 is connected to the bottom end of the corrugated telescopic tube 18 through the tube body. The pump body 17 can extract the liquid from the storage tank 16 and deliver it to each atomizing nozzle 15 through the corrugated telescopic tube 18. The liquid is atomized and sprayed out by the atomizing nozzle 15 so that it can come into contact with the exhaust gas entering the treatment box 1 to eliminate harmful gases and facilitate the settling of particulate impurities in the exhaust gas. In addition, each time the electric telescopic rod 12 drives the piston plate 14 to descend by the first lifting rod 13, it can compress the space below the piston plate 14 so that the exhaust gas entering can fully contact and react with the atomized spray liquid, thereby improving the treatment effect. Furthermore, the corrugated telescopic tube 18 can be stretched and compressed to avoid hindering the up and down movement of the piston plate 14.

[0032] A transition pipe 19 is connected to the top of the treatment box 1. A corrugated expansion pipe 18 is matched with the transition pipe 19. The top end of the transition pipe 19 is connected to the liquid outlet end of the pump body 17. The transition pipe 19 covers the position where the corrugated expansion pipe 18 passes through the treatment box 1 to prevent gas leakage at that position.

[0033] A lifting partition plate 8 is slidably inserted through one end of the air intake pipe 3 near the processing box 1. A linkage lifting mechanism is provided between the lifting partition plate 8 and the telescopic end of the electric telescopic rod 12. The linkage lifting mechanism includes a second lifting rod 11 and a connecting guide sleeve 9. The connecting guide sleeve 9 is connected to the upper part of the lifting partition plate 8 through a rod body. The second lifting rod 11 is connected to the other side of the telescopic end of the electric telescopic rod 12, and the second lifting rod 11 passes through the connecting guide sleeve 9. The second lifting rod 11 can slide up and down relative to the connecting guide sleeve 9. A limit spring 10 is connected between the second lifting rod 11 and the connecting guide sleeve 9. When the electric telescopic rod 12 retracts... When the piston plate 14 is lowered by the first lifting rod 13 to the space where the exhaust gas is located inside the compression chamber 1, the electric telescopic rod 12 also lowers the connecting guide sleeve 9 and the lifting partition plate 8 synchronously through the second lifting rod 11. The lifting partition plate 8 then lowers to block the end of the intake pipe 3, preventing the exhaust gas from flowing back into the intake pipe 3 when the piston plate 14 is in the space where the exhaust gas is located inside the compression chamber 1. When the lifting partition plate 8 is lowered to the position of blocking the end of the intake pipe 3, the electric telescopic rod 12 can continue to retract. At this time, the second lifting rod 11 slides down relative to the connecting guide sleeve 9, and the limit spring 10 is compressed.

[0034] Multiple strip-shaped vent holes 20 are equidistantly arranged on the piston plate 14. Each strip-shaped vent hole 20 has vertically formed strip-shaped grooves 26 on both sides of its inner wall. A connecting block 24 is provided inside the strip-shaped vent hole 20 and is slidably connected to the strip-shaped groove 26. A return spring 27 is connected inside the strip-shaped groove 26. The return spring 27 is located above the sliding ends on both sides of the connecting block 24 and is compressible. A sealing plate 25 that cooperates with the strip-shaped vent hole 20 is connected above the connecting block 24 via a rod. A push rod 23 is rotatably connected to the bottom of the connecting block 24. The rotating end of the push rod 23... A coil spring 28 is connected to the connecting block 24. A limit baffle 21 is connected to the position of the push rod 23 near the bottom of the strip-shaped air leakage hole 20. The limit baffle 21 cooperates with the bottom of the strip-shaped air leakage hole 20. The length of the limit baffle 21 is greater than the width of the strip-shaped air leakage hole 20 but less than the length of the strip-shaped air leakage hole 20. When the limit baffle 21 is in the initial position, it blocks the bottom of the strip-shaped air leakage hole 20. In this way, when the piston plate 14 compresses the exhaust gas inside the treatment box 1, it can prevent the air pressure from rising and directly pushing up the sealing plate 25, that is, it can prevent the strip-shaped air leakage hole 20 from opening in advance and causing the exhaust gas to be discharged in advance.

[0035] Each push rod 23 is fitted with a compression linkage assembly between itself and the bottom of the processing box 1. The compression linkage assembly includes a compression ball 22 and a limiting push post 6. The compression ball 22 is connected to the push rod 23. There are two compression balls 22, and the two compression balls 22 are symmetrically distributed near the bottom of the push rod 23. The limiting push post 6 is located near the bottom of the processing box 1. The limiting push post 6 is connected to the inner wall of the processing box 1 through a bracket. The limiting push post 6 is fitted with the compression ball 22. There are two limiting push posts 6, and the two limiting push posts 6 are respectively aligned with the bottom of the corresponding compression ball 22 off the center of the ball. The two limiting push posts 6 are symmetrically distributed about the center of the push rod 23.

[0036] When the electric telescopic rod 12 retracts and drives the piston plate 14 to press down, the push rod 23 descends synchronously with the piston plate 14. Before the bottom of the push rod 23 contacts the bottom of the processing box 1, the extrusion balls 22 distributed on the push rod 23 abut against the set limiting top post 6. The limiting top post 6 then compresses the extrusion balls 22. Since the limiting top post 6 is aligned with the bottom of the corresponding extrusion ball 22 off-center, the extrusion ball 22 slides relative to the limiting top post 6 when compressed and is subjected to lateral thrust, thereby driving the push rod 23 to rotate relative to the connecting block 24. During the rotation of the push rod 23, the limiting baffle 21 is driven to rotate, deflecting from the left and right position of the strip-shaped air leakage hole 20 to the front and back position. Since the length of the limiting baffle 21 is less than that of the strip-shaped air leakage hole 20, the limiting baffle 21 rotates. The length of the air hole 20 is such that the piston plate 14 continues to press down, and the push rod 23 abuts against the bottom of the processing box 1. Then, due to the compression, the connecting block 24 slides up along the strip groove 26, thereby causing the sealing plate 25 to rise and open. This allows the compressed exhaust gas to quickly pass upward through the strip air hole 20 and then be discharged from the exhaust pipe 2. When the piston plate 14 rises and resets, the connecting block 24 falls and resets due to the return force of the reset spring 27. Then, the push rod 23 rotates under the action of the return force of the disc spring 28, causing the limit baffle 21 to rotate again to the bottom edge of the strip air hole 20 for limiting. The sealing plate 25 then re-closes the strip air hole 20 to facilitate the next round of exhaust gas compression treatment.

[0037] The bottom of the treatment tank 1 is equipped with a storage tank 5. A drain valve 4 that cooperates with the storage tank 5 is installed on one side of the bottom of the treatment tank 1. A liquid level sensor 7 is installed on the inner wall of the treatment tank 1 near the storage tank 5. An alarm that is electrically connected to the liquid level sensor 7 is connected to the outer wall of the treatment tank 1. The liquid from the atomized spray falls into the storage tank 5 and collects. When the collected liquid reaches the corresponding amount, the liquid level sensor 7 generates feedback, which triggers the alarm to alert the staff so that they can open the drain valve 4 in time to drain the liquid from the storage tank 5.

[0038] The working principle of this invention is as follows: First, the exhaust gas from the nitrochlorobenzene production equipment is introduced into the treatment box 1 through the air inlet pipe 3. The pump body 17 can extract the liquid from the storage tank 16 and transport it to each atomizing nozzle 15 through the corrugated telescopic pipe 18. The liquid is atomized and sprayed out by the atomizing nozzle 15 so as to contact and react with the exhaust gas entering the treatment box 1, eliminate harmful gases, and facilitate the sedimentation of particulate impurities in the exhaust gas.

[0039] Furthermore, the telescopic end of the electric telescopic rod 12 continuously reciprocates. Each time the electric telescopic rod 12 drives the piston plate 14 to descend via the first lifting rod 13, it can compress the space below the piston plate 14, compressing the incoming exhaust gas and atomized spray liquid into a smaller space to facilitate full contact and reaction, thereby improving the treatment effect. When the electric telescopic rod 12 drives the piston plate 14 to descend, the electric telescopic rod 12 also drives the connecting guide sleeve 9 and the lifting partition plate 8 to descend synchronously via the second lifting rod 11. The lifting partition plate 8 descends to block the end of the air inlet pipe 3, preventing the exhaust gas from flowing back into the air inlet pipe 3 when the piston plate 14 is compressing the space where the exhaust gas is located inside the treatment box 1. When the lifting partition plate 8 descends to the position of blocking the end of the air inlet pipe 3, the electric telescopic rod 12 can continue to retract. At this time, the second lifting rod 11 slides down relative to the connecting guide sleeve 9, and the limiting spring 10 is compressed.

[0040] During the descent of the piston plate 14, the limiting baffle 21 on the push rod 23 blocks the bottom of the strip-shaped vent hole 20 opened on the piston plate 14. In this way, when the piston plate 14 compresses the exhaust gas inside the treatment box 1, it can prevent the gas pressure from rising and directly pushing up the sealing plate 25, that is, it can prevent the strip-shaped vent hole 20 from opening in advance and causing the exhaust gas to be discharged in advance.

[0041] After the piston plate 14 descends a certain distance, the compression balls 22 distributed on the push rod 23 abut against the set limiting push post 6, and compression occurs between the limiting push post 6 and the compression balls 22. Since the limiting push post 6 is aligned with the bottom of the corresponding compression ball 22 off-center, the compression ball 22 slides relative to the limiting push post 6 when compressed and is subjected to lateral thrust, thereby driving the push rod 23 to rotate relative to the connecting block 24. During the rotation of the push rod 23, the limiting baffle 21 is driven to rotate, deflecting from the left and right position of the strip-shaped air leakage hole 20 to the front and back position. Since the length of the limiting baffle 21 is less than the length of the strip-shaped air leakage hole 20, the piston plate 14 continues to press down at this time. The push rod 23 abuts against the bottom of the processing box 1, and then pushes the connecting block 24 to slide up along the strip groove 26 due to compression, thereby causing the sealing plate 25 to rise and open. This allows the compressed exhaust gas to quickly pass upward through the strip vent hole 20 and then be discharged from the exhaust pipe 2. When the piston plate 14 rises and resets, the connecting block 24 is lowered and reset by the return force of the reset spring 27. Then the push rod 23 rotates under the action of the return force of the disc spring 28, driving the limit baffle 21 to rotate again to the bottom edge of the strip vent hole 20 for limiting. The sealing plate 25 then re-closes the strip vent hole 20 to facilitate the next round of exhaust gas compression treatment.

[0042] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A tail gas recovery device for nitrochlorobenzene production, comprising a treatment box (1), wherein an inlet pipe (3) is connected to one side of the bottom of the treatment box (1), and an exhaust pipe (2) is connected to the top of the treatment box (1); characterized in that: The processing box (1) is equipped with a piston plate (14) inside. An electric telescopic rod (12) is connected to one side of the processing box (1). A first lifting rod (13) is connected to the telescopic end of the electric telescopic rod (12). The first lifting rod (13) passes through the bottom of the processing box (1) and is connected to the piston plate (14). Multiple atomizing nozzles (15) are distributed horizontally and equidistantly at the bottom of the piston plate (14). A spray driving assembly that cooperates with the atomizing nozzles (15) is provided on the top of the processing box (1). The intake pipe (3) has a lifting partition plate (8) that slides through one end near the processing box (1), and a linkage lifting mechanism is provided between the lifting partition plate (8) and the telescopic end of the electric telescopic rod (12). The piston plate (14) has multiple strip-shaped air leakage holes (20) evenly spaced on both sides. Each strip-shaped air leakage hole (20) has a strip-shaped groove (26) on both inner walls. A connecting block (24) is provided inside the strip-shaped air leakage hole (20) and is slidably connected to the strip-shaped groove (26). A return spring (27) is connected inside the strip-shaped groove (26). A sealing plate that cooperates with the strip-shaped air leakage hole (20) is connected above the connecting block (24). 25) A top rod (23) is rotatably connected to the bottom of the connecting block (24). A coil spring (28) is connected between the rotating end of the top rod (23) and the connecting block (24). A limit baffle (21) is connected to the top rod (23) near the bottom of the strip-shaped air leakage hole (20), and the limit baffle (21) cooperates with the bottom of the strip-shaped air leakage hole (20). Each top rod (23) is fitted with a compression linkage assembly between itself and the bottom of the processing box (1).

2. The tail gas recovery device for nitrochlorobenzene production according to claim 1, characterized in that, The extrusion linkage assembly includes an extrusion ball (22) and a limiting top post (6). The extrusion ball (22) is connected to the top rod (23). The limiting top post (6) is located near the bottom of the processing box (1). The limiting top post (6) cooperates with the extrusion ball (22).

3. The tail gas recovery device for nitrochlorobenzene production according to claim 2, characterized in that, Two extrusion balls (22) are provided, and the two extrusion balls (22) are symmetrically distributed at the bottom of the top rod (23). Two limiting top posts (6) are provided, and the two limiting top posts (6) are respectively aligned with the bottom of the corresponding extrusion ball (22) off the center of the ball.

4. The tail gas recovery device for nitrochlorobenzene production according to claim 1, characterized in that, The bottom of the processing tank (1) is provided with a storage tank (5). A drain valve (4) that cooperates with the storage tank (5) is provided on one side of the bottom of the processing tank (1). A liquid level sensor (7) is provided on the inner wall of the processing tank (1) near the storage tank (5). An alarm that is electrically connected to the liquid level sensor (7) is connected to the outer wall of the processing tank (1).

5. The tail gas recovery device for nitrochlorobenzene production according to claim 1, characterized in that, The spray drive assembly includes a liquid storage tank (16) and a corrugated telescopic pipe (18). The liquid storage tank (16) is located on the top of the processing tank (1). A pump body (17) is provided on the liquid storage tank (16). The outlet end of the pump body (17) is connected to one end of the corrugated telescopic pipe (18). The other end of the corrugated telescopic pipe (18) passes through the top of the processing tank (1). Each atomizing nozzle (15) is connected to the bottom end of the corrugated telescopic pipe (18).

6. The tail gas recovery device for nitrochlorobenzene production according to claim 5, characterized in that, The top of the processing box (1) is connected to a transition pipe (19), and the corrugated expansion pipe (18) cooperates with the transition pipe (19).

7. The tail gas recovery device for nitrochlorobenzene production according to claim 1, characterized in that, The linkage lifting mechanism includes a second lifting rod (11) and a connecting guide sleeve (9). The connecting guide sleeve (9) is connected above the lifting partition plate (8). The second lifting rod (11) is connected to the other side of the telescopic end of the electric telescopic rod (12), and the second lifting rod (11) passes through the connecting guide sleeve (9). A limit spring (10) is connected between the second lifting rod (11) and the connecting guide sleeve (9).

8. The tail gas recovery device for nitrochlorobenzene production according to claim 1, characterized in that, The length of the limiting baffle (21) is greater than the width of the strip-shaped air leakage hole (20) and less than the length of the strip-shaped air leakage hole (20).

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