Waste gas treatment device for methyltin chloride production

Abstract

The invention belongs to the technical field of energy recovery, and particularly relates to a waste gas treatment device for methyltin chloride production. The invention provides a waste gas treatment device for production of methyltin chloride. The waste gas treatment device comprises a condenser, a gas inlet pipe and a gas outlet pipe, the absorption tower is characterized in that a plurality of tower plates are arranged in the tower body in a staggered manner at equal intervals, and a plurality of filter holes are formed in the tower plates; the catalytic furnace is used for heating, catalyzing and recycling organic matters; the condenser, the absorption tower and the catalytic furnace are sequentially connected; one end of the plate heat exchanger is communicated with the condenser, and the other end is communicated with a gas outlet pipe of the absorption tower; the tower plate is provided with a transverse groove, the sliding rod is in sliding sealing connection with the transverse groove, the sliding rod is provided with a plurality of penetrating holes, the penetrating holes are matched with the filtering holes, the cylinder body is arranged in the tower plate, the piston plate is in sliding sealing connection with the cylinder body, and the piston plate is fixedly connected with the sliding rod. According to the scheme, the problem that equipment cannot run for a long time due to blockage of tower plate filter holes is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy recovery, and particularly relates to an exhaust gas treatment device for the production of methyltin chloride. Background Art

[0002] During the production of methyltin chloride, exhaust gas containing volatile organic compounds (VOCs) and other harmful gases is generated. If these exhaust gases are directly discharged into the atmosphere without treatment, they will not only pollute the environment but also pose a hazard to human health. Therefore, the development of an efficient exhaust gas treatment device is crucial for achieving environmental protection goals and ensuring the health of workers.

[0003] Currently, a product separation process and device for catalytic oxidation of hydrogen chloride to chlorine with the publication number CN115806273A has a process where the gas product is successively subjected to two-stage condensation treatment, dehydration treatment, pressurization treatment, cooling treatment, and low-temperature rectification treatment in a product separation device to obtain a separated product; the device includes a condensation separation and dehydration unit, a gas compression unit, and a low-temperature rectification unit, which utilizes the efficient separation and recovery of chlorine-containing gas after the catalytic oxidation reaction of hydrogen chloride gas and oxygen. Through condensation and drying with concentrated sulfuric acid, and then low-temperature rectification of chlorine gas in the gas phase under high pressure to achieve the recovery of chlorine.

[0004] However, there are also some problems: the absorption tower in this solution is prone to blockage, resulting in the inability to operate for a long time. Summary of the Invention

[0005] This solution provides an exhaust gas treatment device for the production of methyltin chloride to solve the problem that the device cannot operate for a long time due to blockage of the tower plate filter holes.

[0006] This solution provides an exhaust gas treatment device for the production of methyltin chloride, including: A condenser: used for condensing and recovering organic substances; An absorption tower: multiple tower plates are provided, and the multiple tower plates are arranged at equal intervals and staggered in the tower body. The tower plates are provided with multiple filter holes; A catalytic furnace: used for heating and catalyzing the recovery of organic substances; The condenser, absorption tower, and catalytic furnace are connected in sequence; A plate heat exchanger: one end of the plate heat exchanger is communicated with the condenser, and the other end is communicated with the outlet pipe of the absorption tower; It further includes a sliding rod, a cylinder body, and a piston plate. The tower plate is provided with a transverse groove. The sliding rod is slidably and sealingly connected to the transverse groove. The sliding rod is provided with multiple through holes, and the through holes cooperate with the filter holes. The cylinder body is arranged inside the tower plate. The piston plate is slidably and sealingly connected to the cylinder body. The piston plate is fixedly connected to the sliding rod.

[0007] The principle of this solution is as follows: The condenser condenses at a low temperature (0~5°C) to recover volatile organic compounds (such as solvent vapor and unreacted raw materials), reducing the subsequent treatment load. Then the gas enters the absorption tower, which is filled with NaOH or Ca(OH) 2 solution to neutralize HCl and Cl 2 , and the reaction generates NaCl / CaCl 2 , with gas-liquid countercurrent contact.

[0008] Under normal atmospheric pressure, the filter holes and through holes of the tray are staggered, making the filter holes smaller, so that the liquid can contact the gas for a longer time, improving the completion degree of the reaction.

[0009] When the filter holes are blocked due to fouling caused by gas-liquid reaction, in the long run, liquid flooding will occur at the edge seal gap, and the pressure at the tray will increase, causing the gas in the cylinder to be compressed, the piston plate to move inward, driving the sliding rod to move. The movement of the sliding rod makes the through hole gradually align with the filter hole, making the available filter holes larger, increasing the gas throughput, and preventing the device from malfunctioning due to liquid flooding.

[0010] Finally, the gas is sent from the outlet pipe into the catalytic furnace. Under the action of noble metal catalysts (Pt / Pd) in the catalytic furnace, organic tin and VOCs are decomposed at a low temperature of 200~400°C into CO 2 , H 2 O and SnO 2 .

[0011] The condensed water in the condenser that has been cooled is sent to the plate heat exchanger. Then the gas from the absorption tower is first sent to the plate heat exchanger for heat exchange to preheat the gas, and the preheated gas is then sent into the catalytic furnace for catalysis.

[0012] The beneficial effect of this solution is that this mechanism automatically adjusts the size of the filter holes used by air pressure. When the pressure drop is small, the gas-liquid contact time can be increased. When the pressure drop is large, the size of the filter holes used is adjusted to increase the gas passing rate and prevent the filter holes from being blocked, resulting in the problem that liquid flooding is likely to occur at the edge seal gap and the device cannot operate for a long time.

[0013] Furthermore, it also includes a downcomer, which is fixedly connected to the sliding rod, and the sliding rod cooperates with the tower body. Sometimes increasing the filter holes will still cause liquid flooding, and at this time, it is necessary to increase the width of the edge seal gap to allow the gas to pass through.

[0014] Under normal atmospheric pressure, the sliding rod is in the extended state. At this time, the downcomer is close to the tower body, making the edge seal gap small, so that more liquid and gas pass through the filter holes, increasing the gas-liquid contact area.

[0015] When the pressure at the tray increases, the sliding rod will retract, driving the downcomer to retract, increasing the edge sealing gap, allowing more liquid to flow down and preventing flooding.

[0016] Furthermore, it also includes a bag filter, which is connected in sequence with the condenser, the bag filter, the absorption tower, and the catalytic furnace. Part of the reason for the easy blockage of the tray is that the gas contains solid particle impurities, so a device capable of removing impurities is required. The bag filter can remove the solid particles in the gas, preventing the gas from entering the absorption tower with solid particles and causing blockage of the tray filter holes.

[0017] Furthermore, the tray is rotatably connected to the absorption tower through a torsion spring. When flooding occurs, generally, it is necessary to increase the edge sealing gap or the filter holes to allow more gas to pass through. The rotation of the tray can increase the width of the edge sealing gap. The rotation angle of the tray is from -5° to 5°. The torsion spring is installed at the connection between the tray and the absorption tower, enabling the tray to rotate freely within a certain range. When subjected to external forces (such as changes in air flow pressure), the tray can automatically adjust the angle to optimize the gas-liquid distribution.

[0018] Furthermore, it also includes a return spring. One end of the return spring is fixedly connected to the cylinder block, and the other end is fixedly connected to the piston plate. When the external air pressure returns to atmospheric pressure, the return spring can use its elastic potential energy to push the piston plate back to the initial position. Ensure that the sliding rod and its through hole can automatically return to the preset state, providing consistent operating conditions.

[0019] Furthermore, it also includes a connecting pipe, which cooperates with the tray. The connecting pipe is provided with an electromagnetic valve. The intake end of the connecting pipe is located in the high-pressure area above the tray, and the outlet end is located in the low-pressure area below the tray, and the outlet end is inclined downward at an angle to impact and vibrate the lower tray. And each tray is provided with a connecting pipe. The outlet end is not higher than the upper tray, and the intake end is not lower than the lower tray.

[0020] When it is found that flooding occurs at the tray, the operator only needs to open the electromagnetic valve to connect the connecting pipe. The gas will pass over the tray through the connecting pipe, which is equivalent to the tray not functioning, and the flooding at this location will also be solved. And the gas will impact the tray under pressure, causing the tray to shake up and down under the action of the torsion spring, shaking off the blocked impurities.

[0021] After the flooding is solved, the operator only needs to close the electromagnetic valve to restore the function of the tray.

[0022] Further, a metal contact switch is provided inside the cylinder body. The metal contact switch is electrically connected to the solenoid valve and cooperates with the piston plate. The piston plate is a piston plate made of ferromagnetic material. It is very troublesome to manually open the solenoid valve every time. In this solution, when the pressure is too high, the piston plate will touch the metal contact switch, and the metal contact switch will open the solenoid valve, causing the connecting pipe to be connected. The gas will pass over the tray through the connecting pipe, which is equivalent to the tray not working, and the liquid flooding at this place will also be solved. This mechanism realizes the automatic opening and closing of the solenoid valve through the cooperation of the electromagnet and the metal contact switch.

[0023] Further, it also includes a pressure detection mechanism and a buzzer. The pressure detection mechanism is used to detect the total pressure inside the tower body. The pressure detection mechanism is electrically connected to the buzzer, and the buzzer is arranged outside the tower body. Excessive pressure in the absorption tower will cause equipment damage, so a device that can monitor the pressure in real time is needed. In this solution, when the overall pressure inside the absorption tower reaches the set value, the pressure detection mechanism will control the buzzer to alarm, notifying the operator to handle it. This mechanism can timely notify the staff to handle it through the buzzer alarm, and can minimize the losses caused by excessive pressure. Brief Description of the Drawings

[0024] Figure 1 It is a structural diagram of an exhaust gas treatment device for the production of methyltin chloride. Figure 2 It is a cross-sectional view of the absorption tower of an exhaust gas treatment device for the production of methyltin chloride. Figure 3 It is an initial state diagram of the absorption tower of an exhaust gas treatment device for the production of methyltin chloride. Figure 4 It is a state diagram of the absorption tower of an exhaust gas treatment device for the production of methyltin chloride with increased pressure.

[0025] The reference numerals in the drawings of the specification include: 1. Condenser; 2. Bag filter; 3. Absorption tower; 4. Catalytic furnace; 5. Outlet pipe; 6. Tower body; 7. Connecting pipe; 8. Solenoid valve; 9. Inlet pipe; 10. Tray; 11. Inlet liquid pipe; 12. Metal contact switch; 13. Filter hole; 14. Cylinder body; 15. Return spring; 16. Piston plate; 17. Sealing ring; 18. Through hole; 19. Sliding rod; 20. Downcomer; 21. Torque spring; 22. Edge seal gap. Detailed Description of the Invention

[0026] As shown in the Figure 1 drawings: The waste gas treatment device for the production of methyltin chloride of the present invention includes a condenser 1, a bag filter 2, an absorption tower 3, a catalytic furnace 4, and a plate heat exchanger connected in sequence. The waste gas treatment process is as follows: Condensation recovery stage: The waste gas first enters the condenser 1, and volatile organic compounds (such as toluene, unreacted methyltin compounds) are recovered by low-temperature (0~5°C) condensation; Dust removal stage: The condensed gas passes through the bag filter 2 to remove particulate matter (such as tin compound dust); Absorption and neutralization stage: The gas enters the absorption tower 3 and contacts the NaOH solution sprayed in the tower in a countercurrent manner to neutralize acidic gases such as HCl and Cl 2 and so on; Catalytic decomposition stage: The purified gas enters the catalytic furnace 4 after being preheated by the plate heat exchanger, and organic tin and residual VOCs are decomposed under the action of the catalyst; Heat energy recovery: The cooling water of the condenser 1 exchanges heat with the inlet gas of the catalytic furnace 4 through the plate heat exchanger to preheat the gas and reduce the energy consumption of the catalytic furnace 4.

[0027] As shown in the attached Figure 2 、 Figure 3 figure: The absorption tower 3 is provided with a liquid inlet pipe 11, a liquid outlet pipe, a gas inlet pipe 9, and a gas outlet pipe 5, and one-way valves are provided on the liquid inlet pipe 11, the liquid outlet pipe, the gas inlet pipe 9, and the gas outlet pipe 5. Inside the absorption tower 3, there are multiple layers of tower plates 10 arranged at equal distances and staggered, and in the initial state, the tower plates 10 are inclined downward by 5° (based on the axis of the tower body). This angle can prevent liquid from accumulating near the cylinder body 14, resulting in liquid inlet to the cylinder body 14. Each layer of tower plate 10 is rotatably connected to the tower body 6 through a torsion spring 21, allowing the tower plate 10 to adaptively adjust the angle within the range of -5° to 5°. The gap between the tower plate 10 and the tower body 6 is designed as an adjustable sealing structure. When the filter hole 13 is blocked, the gap part is filled with liquid to form a local seal, resulting in an increase in pressure at the tower plate 10.

[0028] The gap between the tower plate 10 and the tower body 6 is dynamically adjusted by the lateral movement of the sliding rod 19. When the filter hole 13 is blocked, liquid flooding is likely to occur. After liquid flooding occurs, the pressure at the tower plate 10 increases, pushing the piston plate 16 to compress the gas in the cylinder body 14, driving the sliding rod 19 to move laterally, so that the gap part is filled with liquid to form a local seal, and at the same time, the through hole 18 gradually aligns with the filter hole 13, increasing the gas flux. When the pressure difference is restored, the return spring 15 pushes the piston plate 16 to reset, and the gap returns to the initial state.

[0029] Physical mechanism description of liquid flooding seal: When the filter hole 13 is blocked, resulting in an increase in the pressure difference at the tray 10, the flow rate of the liquid through the filter hole 13 decreases, and the liquid accumulates on the surface of the tray 10. When the tray 10 is locally flooded due to the blockage of the filter hole 13, the gap between the tray 10 and the tower body 6 is dynamically adjusted to the micron level (0.1 - 0.5 mm) through the lateral movement of the sliding rod 19. After the liquid accumulates, it forms a liquid film under the action of surface tension, fills the gap, and forms a local seal. The rotation angle (±5°) of the tray 10 is only used to optimize the gas-liquid distribution in the non-flooded state. During flooding, the gap size is locked through the lateral displacement of the sliding rod 19 to ensure the sealing effectiveness. This sealed state is achieved through the following two points: Hydrostatic pressure effect: When flooding occurs, the height of the liquid layer above the tray 10 increases, and the static pressure pushes the liquid into the gap; Surface tension effect: The difference in wettability of the liquid (such as NaOH solution) between the metal tower body (6) and the tray (10) material (such as polytetrafluoroethylene) promotes the stable filling of the gap by the liquid film.

[0030] In the simulated flooding experiment, when the pressure difference of the tray (10) reaches 5 kPa, the liquid filling rate in the gap reaches 95%, and the sealing effect is remarkable; By adjusting the gap size (the optimal value is 0.3 mm), it is possible to ensure the gas-liquid contact efficiency under normal operating conditions and quickly form a seal during flooding.

[0031] During flooding, the liquid fills the gap to form a sealing layer, preventing the gas from directly escaping through the gap and forcing the gas to pass through the filter hole 13 or the connecting pipe 7. The liquid film seal causes the pressure difference at the tray 10 to further increase, pushing the piston plate 16 to compress the gas in the cylinder body 14 and driving the lateral movement of the sliding rod 19; After the sliding rod 19 moves, the through hole 18 aligns with the filter hole 13, increasing the gas flux. At the same time, the downcomer 20 retracts to widen the width of the edge seal gap 22, and the dual mechanism alleviates flooding.

[0032] It also includes a sliding rod 19, a cylinder body 14, and a piston plate 16. The tray 10 is provided with a plurality of filter holes 13, which are equidistantly separated. There is a transverse groove in the middle, and the sliding rod 19 is installed in the transverse groove. The sliding rod 19 is provided with a through hole 18 that is misaligned with the filter hole 13; during normal operation, only part of the filter hole 13 overlaps with the through hole 18, restricting the gas passing speed and prolonging the gas-liquid contact time. The sliding rod 19 is made of corrosion-resistant material.

[0033] The cylinder body 14 is arranged inside the tray 10. The piston plate 16 is slidably and sealingly connected to the cylinder body 14. The piston plate 16 is fixedly connected to the sliding rod 19. A sealing ring 17 is provided at the sliding part of the sliding rod 19 and the cylinder body 14 for strengthening the seal.

[0034] One end of the return spring 15 is fixedly connected to the cylinder block 14, and the other end is fixedly connected to the piston plate 16. When the external air pressure returns to the atmospheric pressure, the return spring 15 can use its elastic potential energy to push the piston plate 16 back to the initial position, ensuring that the sliding rod 19 and its through hole 18 can automatically return to the preset state and providing consistent operating conditions.

[0035] When the filter hole 13 is blocked, the amount of liquid passing through the channel decreases, which will increase the probability of flooding in the edge sealing gap 22 between the tray 10 and the tower body 6. Once flooding occurs, it will indirectly cause an increase in the pressure drop between the upper and lower trays. When the blockage of the filter hole 13 causes the pressure difference of the tray 10 to rise, the gas pressure pushes the piston plate 16 to compress the gas in the cylinder block 14, driving the sliding rod 19 to move laterally, gradually aligning the through hole 18 with the filter hole 13, expanding the effective through-hole area, and preventing flooding.

[0036] Downcomer 20 linkage: The sliding rod 19 is fixedly connected to the downcomer 20. When the pressure difference increases, the sliding rod 19 retracts, driving the downcomer 20 to retract, increasing the width of the edge sealing gap 22, accelerating the liquid flow downward, and preventing liquid accumulation. The edge sealing gap 22 is formed by the gap between the downcomer 20 and the tower body 6. When the sliding rod 19 retracts, the distance between the downcomer 20 and the tower body 6 increases, and the width of the edge sealing gap 22 increases accordingly, accelerating the liquid flow downward.

[0037] The intake end of the connecting pipe 7 is located in the high-pressure area above the tray 10, and the outlet end is located in the low-pressure area below the tray 10, and the outlet end is inclined downward and aligned with the lower tray 10 to impact and vibrate. Each tray 10 is provided with a connecting pipe 7, and the outlet end is not higher than the upper tray 10, and the intake end is not lower than the lower tray 10. The intake end of the connecting pipe 7 is located in the high-pressure area above the tray 10, and the outlet end is located in the low-pressure area below. When the solenoid valve 8 is opened, the gas bypasses through the connecting pipe 7 to balance the pressure difference.

[0038] When the flooding cannot be solved by adaptive adjustment, the pressure will continue to cause the piston plate 16 to move, causing the piston plate 16 to contact the metal contact switch 12. The metal contact switch 12 triggers the solenoid valve 8 to open, and the gas bypasses the blocked tray 10 through the connecting pipe 7, making this tray 10 ineffective, but the other trays 10 still continue to function. Compared with the existing mechanism where flooding of one tray 10 will cause the pressure of the entire tower body 6 to collapse, this mechanism abandons one tray 10 so that the absorption tower 3 can continue to be used, extending the service life of the absorption tower 3.

[0039] The inclined air outlet end of the connecting pipe 7 impacts the lower tray 10. Combining with the elasticity of the torsion spring 21, the tray 10 vibrates to shake off the blockage. This mechanism has the possibility of restoring the function of the tray 10. The swaying of the tray 10 is achieved through the elastic deformation of the torsion spring 21. When the air flow in the connecting pipe 7 impacts the tray 10, it swings around the connecting shaft, driving the filter holes 13 to vibrate to remove scale. The tray 10 and the tower body 6 are rotationally connected through the torsion spring 21, and the width of the edge sealing gap 22 is automatically adjusted as the sliding rod 19 moves. The edge sealing gap 22 refers to the gap between the pressure reducing plate 20 and the tower body 6, and the torsion spring 21 is located at the connection between the tray and the tower body. When the air flow in the connecting pipe 7 impacts the tray 10, the tray 10 generates high-frequency and small-amplitude vibrations around the torsion spring 21. Combining with the scouring action of the air flow, the scale in the filter holes 13 can be effectively removed. This vibration amplitude has been verified by experiments (amplitude ≤ 0.5 mm) and will not affect the structural stability of the tray 10.

[0040] The pressure detection mechanism is installed at the bottom and top of the tower body 6, and is used to monitor the pressure difference in the areas where different trays 10 are located respectively. The pressure detection mechanism monitors the pressure inside the tower body 6 in real time. If it exceeds the set threshold, the buzzer will be activated to alarm, prompting the operator to check or start the emergency process.

[0041] As shown in the Figures 1-4 appendix: The principle of this solution is as follows: In the condensation recovery stage: The waste gas first enters the condenser 1, and volatile organic compounds (such as toluene, unreacted methyltin compounds) are recovered by low-temperature (0 - 5 °C) condensation; In the dust removal stage: The condensed gas passes through the bag filter 2 to remove particulate matter (such as tin compound dust); In the absorption and neutralization stage: The gas enters the absorption tower 3 from the inlet pipe 9 and contacts the NaOH solution sprayed in the tower countercurrently to neutralize acidic gases such as HCl and Cl 2 In normal atmospheric pressure, the filter holes 13 and the through holes 18 of the tray 10 are partially staggered, making the filter holes 13 smaller, so that the liquid can contact the gas for a longer time, improving the completion degree of the reaction. At the same time, under normal atmospheric pressure, the sliding rod 19 is in the extended state. At this time, the downcomer 20 is close to the tower body 6, making the edge sealing gap 22 small, so that more liquid and gas pass through the filter holes 13, increasing the gas-liquid contact area.

[0042] When the filter hole 13 of a certain tray 10 is blocked, the pressure at this tray 10 will increase, causing the gas in the cylinder body 14 to be compressed. The piston plate 16 moves inward, driving the sliding rod 19 to move. As the sliding rod 19 moves, the through hole 18 gradually aligns with the filter hole 13, increasing the available filter hole 13 and the gas throughput, preventing flooding and ensuring the normal operation of the device. At the same time, when the pressure at the tray 10 increases, the sliding rod 19 will retract, driving the downcomer 20 to retract, increasing the edge sealing gap 22 and allowing more liquid to flow down, preventing flooding. If there is no pressure increase at the other trays 10, they remain unchanged. In this solution, when flooding occurs, the pressure at each tray 10 is different. The intake end of the connecting pipe 7 is located above the tray 10 (high-pressure area), and the outlet end is located in the low-pressure area of the lower tray 10. Due to the gas-liquid countercurrent in the absorption tower 3, the pressure at the bottom tray 10 is significantly higher than that at the top due to the static pressure of the liquid column and the gas compression effect, forming a pressure gradient from bottom to top.

[0043] When the pressure continues to increase even when the filter hole 13 of the tray 10 reaches its maximum flow, the piston plate 16 will continue to move and contact the metal contact switch 12. The metal contact switch 12 will open the solenoid valve 8, connecting the connecting pipe 7. The gas will pass over the tray 10 through the connecting pipe 7, making this tray 10 ineffective and solving the flooding problem at this location. At the same time, the gas coming out from the outlet end will blow air against this tray 10, causing the tray 10 to shake and shake off the impurities in the filter hole 13.

[0044] With the connection of the connecting pipe 7, the pressure below the tray 10 gradually recovers, causing the piston plate 16 to return under the action of the return spring 15 and closing the solenoid valve 8. If the scale on the filter hole 13 of this tray 10 is cleaned off by shaking, then this tray 10 can operate normally again.

[0045] Catalytic decomposition stage: The purified gas enters the catalytic furnace 4 after being preheated by the plate heat exchanger, and decomposes organotin and residual VOCs under the action of the catalyst; Heat energy recovery: The cooling water of the condenser 1 exchanges heat with the incoming gas of the catalytic furnace 4 through the plate heat exchanger to preheat the gas and reduce the energy consumption of the catalytic furnace 4.

[0046] The beneficial effects of this solution are as follows: 1. By recovering the thermal energy in the recovery condenser 1 and sending the preheated gas back into the catalytic furnace 4 for catalysis, the energy consumption of the catalytic furnace 4 can be reduced. 2. This mechanism automatically adjusts the size of the filter holes 13 used by air pressure. When the pressure drop is small, the gas-liquid contact time can be increased. When the pressure drop is large, the size of the filter holes 13 used is adjusted to increase the gas passing rate and prevent flooding. 3. This solution can also adjust the size of the edge seal gap 22 at the same time to further prevent flooding. 4. When the pressure of a tray 10 still continues to increase after the above two adjustments in this solution, the connecting pipe 7 will be connected. By eliminating the function of one tray 10, the collapse of the entire system can be prevented. At the same time, the gas will flush the tray 10 through the connecting pipe 7, causing the tray 10 to shake up and down under the action of the torsion spring 21 to shake off the blocked impurities. It is possible to restore the function of the tray 10.

[0047] The above are only the embodiments of the present invention. Common knowledge such as the specific structures and characteristics in the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A waste gas treatment device for the production of methyltin chloride, comprising: Condenser (1): used for condensing and recovering organic matter; Absorption tower (3): a plurality of the tower plates (10) are provided, and the plurality of tower plates (10) are arranged in a tower body (6) at equal intervals and staggered, and the tower plates (10) are provided with a plurality of filter holes (13); Catalytic furnace (4): used for heating and catalytic recovery of organic matter; The condenser (1), the absorption tower (3) and the catalytic furnace (4) are connected in sequence; Plate heat exchanger: one end of the plate heat exchanger is connected to the condenser (1), and the other end is connected to the air outlet pipe (5) of the absorption tower (3); It is characterized by further comprising: A sliding rod (19), a cylinder body (14) and a piston plate (16), wherein the tower plate (10) is provided with a transverse groove, the sliding rod (19) is slidably and hermetically connected to the transverse groove, the sliding rod (19) is provided with a plurality of through holes (18), the through holes (18) are matched with the filter holes (13), the cylinder body (14) is arranged inside the tower plate (10), the piston plate (16) is slidably and hermetically connected to the cylinder body (14), and the piston plate (16) is fixedly connected to the sliding rod (19).

2. A waste gas treatment device for methyltin chloride production according to claim 1, characterized in that: It also includes a liquid downcomer plate (20), wherein the liquid downcomer plate (20) is fixedly connected to the sliding rod (19), and the sliding rod (19) is matched with the tower body (6).

3. A waste gas treatment device for methyltin chloride production according to claim 1, characterized in that: It also includes a bag filter (2), and the condenser (1), the bag filter (2), the absorption tower (3) and the catalytic furnace (4) are connected in sequence.

4. A waste gas treatment device for methyltin chloride production according to claim 1, characterized in that: The tower plate (10) is rotationally connected to the absorption tower (3) via a torque spring.

5. A waste gas treatment device for methyltin chloride production according to claim 4, characterized in that: It also includes a return spring (15), one end of the return spring (15) being fixedly connected to the cylinder body (14), and the other end of the return spring (15) being fixedly connected to the piston plate (16).

6. A waste gas treatment device for methyltin chloride production according to claim 5, characterized in that: It also includes a connecting pipe (7), the connecting pipe (7) being matched with the tower plate (10), and the connecting pipe (7) being provided with a solenoid valve (8).

7. A waste gas treatment device for methyltin chloride production according to claim 6, characterized in that: A metal contact switch (12) is provided in the cylinder body (14), the metal contact switch (12) is electrically connected to the solenoid valve (8), and the metal contact switch (12) cooperates with a piston plate (16), and the piston plate (16) is a piston plate (16) made of ferromagnetic material.

8. The waste gas treatment device for methyltin chloride production according to claim 1, characterized in that: It also comprises a pressure detection mechanism and a buzzer, wherein the pressure detection mechanism is used to detect the total pressure in the tower body (6), the pressure detection mechanism is electrically connected to the buzzer, and the buzzer is arranged outside the tower body (6).

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