Methyl carbamate phosgene-containing tail gas treatment device

Abstract

The invention relates to the technical field of tail gas treatment, and particularly discloses a methyl carbamate phosgene-containing tail gas treatment device which comprises an alkaline washing tower, a gas inlet pipeline and a gas outlet pipeline, and a plurality of alkaline solution feeding pipes are arranged on the alkaline washing tower; the bottom of the alkaline washing tower is communicated with a collection pool, the collection pool is connected with a treatment pool, a material pushing head assembly is arranged in the collection pool and connected with a material pushing power assembly, and the material pushing power assembly drives the material pushing head assembly to move. After the material pushing power assembly moves by a certain distance, the discharging baffle is pushed to rotate towards the upper side, at the moment, waste water is fully accumulated near the discharging baffle under pushing of the material pushing head assembly, then the waste water flows out of a gap between the discharging baffle and the inner wall of the collecting pool, and the gap is always smaller than the liquid level of the waste water in the process; and then a bottom plate in the material pushing head assembly abuts against the discharging baffle, the sewage draining exit is sealed again, and waste gas in the alkaline washing tower can only be discharged from the sewage draining exit after being mixed with the alkaline solution.

Description

Technical Field

[0001] The invention belongs to the technical field of tail gas treatment, and in particular relates to a device for treating tail gas containing phosgene from methyl carbamate. Background Art

[0002] The tail gas produced during the production of methyl carbamate contains a variety of harmful substances, such as MDI (toluene diisocyanate), PI (phenyl isocyanate), chlorobenzene, phosgene, also known as carbonyl chloride (dichlorocarbonyl), etc.

[0003] In the Chinese patent for destruction of phosgene-containing tail gas with announcement number CN 203264540 U, ​​it is disclosed that: it is composed of a tail gas buffer tank, a flow distribution station and a plurality of phosgene treatment units, the tail gas of the tail gas buffer tank is distributed to the phosgene treatment unit through the flow distribution station, the phosgene treatment unit includes a falling film absorption tower, a catalytic decomposition tower, a plurality of acid washing towers and an alkaline washing tower connected in sequence, and the phosgene treatment unit is also provided with a water tank, which is respectively connected to the falling film absorption tower, the catalytic decomposition tower and the acid washing tower;

[0004] However, when the above device is used, after the tail gas enters the alkali washing tower, it mixes with the atomized alkali solution. The waste water and part of the tail gas remain inside the alkali washing tower after mixing. In the process of discharging these waste waters, there are the following problems: first, the liquid level of the alkali solution gradually becomes lower, the amount of the alkali solution decreases, and some spaces are gradually generated inside the pipe for discharging the alkali solution. These spaces will have tail gas flowing, so that the residual tail gas inside the alkali washing tower is not mixed with the alkali solution and is directly discharged. The directly discharged tail gas will cause damage to the bodies of people around; secondly, during the discharge of the alkali solution, some solutions will remain at the sewage outlet. These solutions are still alkaline, which will cause the sewage outlet to be corroded faster. Therefore, the present application proposes a tail gas treatment device containing phosgene from methyl carbamate. Summary of the invention

[0005] The object of the present invention is to provide a device for treating tail gas containing phosgene from methyl carbamate to solve the problems raised by the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a methyl carbamate phosgene-containing tail gas treatment device, comprising an alkali washing tower, an air inlet pipe, and an air outlet pipe, wherein the alkali washing tower is provided with a plurality of alkali solution feed pipes;

[0007] The bottom of the alkali washing tower is connected to the collection pool, the collection pool is connected to the treatment pool, a push head assembly is arranged in the collection pool, the push head assembly is connected to the push power assembly, the push power assembly drives the push head assembly to move, and pushes the wastewater in the collection pool into the sewage outlet;

[0008] A material discharge baffle is provided in the collection pool, and the material discharge baffle is connected to an opening and closing component for driving the material discharge baffle to open and close. When the material discharge baffle is opened to the maximum angle, the bottom plate abuts against the outer wall of the material discharge baffle;

[0009] A pusher blade is provided at a position of the collection tank corresponding to the sewage outlet, and the pusher blade is connected to a driving component for driving the pusher blade to rotate;

[0010] An acid solution storage box is provided at the treatment tank, and the acid solution storage box is connected to a feed pipe inserted into the bottom of the treatment tank, and the feed pipe is inserted into one side of the separation plate close to the collection tank.

[0011] Preferably, the pushing head assembly includes a pushing rack, the two end faces of the pushing rack respectively fit into the two inner walls of the collecting tank, a bottom plate is installed at the lower end of the pushing rack, a plurality of pushing inclined plates inclined toward the sewage outlet are arranged at the lower end of the bottom plate, the pushing rack is connected to a lifting and lowering motor for driving it to lift or fall, and the lifting and lowering motor is installed on a slider.

[0012] Preferably, the slider is connected to a slide groove in the collection tank, the slide groove passes through the outer wall of the collection tank on the side close to the treatment tank, and two sliders are provided, and the two sliders are respectively located at both ends of the push inclined plate.

[0013] Preferably, the pushing power assembly includes a push-pull plate, which is inserted into the slide groove and connected to the output end of the cylinder.

[0014] Preferably, a U-shaped groove is provided at the bottom of the unloading baffle, and a U-shaped sealing gasket is installed in the U-shaped groove. When the unloading baffle is closed, the U-shaped sealing gasket rests against the inner wall of the collecting pool.

[0015] Preferably, the opening and closing assembly includes a lifting guide block and a pushing plate. The lifting guide block is located on the unloading baffle plate, and the lifting guide block is connected to the sealing seat through a rotating shaft. An arc-shaped working part is provided on the side of the lifting guide block close to the pushing head assembly, and the center of the arc-shaped working part coincides with the center line of the rotating shaft. The pushing plate is provided on the pushing head assembly, and the lifting guide block is aligned with the pushing plate.

[0016] Preferably, the driving assembly includes a transmission gear and a transmission rack, one end of the transmission rack is connected to the push-pull plate, and the other end is connected to the output end of the cylinder, and the transmission rack is connected to the transmission gear through tooth meshing transmission.

[0017] Preferably, a first connecting shaft is inserted at the center of the transmission gear, the first connecting shaft is connected to the second connecting shaft through the first gear and the second gear, the second connecting shaft is arranged on the mounting seat through a bearing, and the second connecting shaft is connected to the push blade through a sprocket and a chain.

[0018] Preferably, an intermediate shaft is inserted into the middle of the push blade, the intermediate shaft is inserted into the power cavity, sprockets are installed on the second connecting shaft and the intermediate shaft, the two sprockets are connected by a chain, and the chain is located in the power cavity.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The sewage outlet in the present invention is blocked by the discharge baffle. The discharge baffle will be pushed to rotate upward only after the pushing power assembly moves a certain distance. At this time, the area near the discharge baffle is filled with wastewater under the push of the pushing head assembly. Then the wastewater flows out from the gap between the discharge baffle and the inner wall of the collection tank. During the process, the gap is always smaller than the liquid level of the wastewater. Then the bottom plate in the pushing head assembly is against the discharge baffle to seal the sewage outlet again. The waste gas inside the alkali washing tower can only be discharged from the sewage outlet after mixing with the alkaline solution, thereby avoiding the direct discharge of the tail gas remaining in the alkali washing tower.

[0021] 2. The present invention provides a pusher blade at the sewage outlet. The cylinder pulls the transmission rack to move, thereby driving the transmission gear to rotate. The transmission gear adjusts the rotation mode of the second connecting shaft through the first gear and the second gear. Then the second connecting shaft and the pusher blade are connected through a sprocket and a chain. The rotation of the pusher blade can push the sewage to flow, avoid it from being blocked at the sewage outlet, and prevent the sewage outlet from being corroded.

[0022] 3. The present invention treats the wastewater by introducing an acidic solution to neutralize the alkaline solution, and at the same time, a separation plate is provided to filter the neutralized wastewater to treat and improve the wastewater.

[0023] 4. In the present invention, a pushing head assembly is provided with a pushing inclined plate and other components, so that it can fit with the inner wall of the lower end of the collecting tank, and the pushing inclined plate is inclined to the side close to the sewage outlet, and the lifting and falling motor can drive the pushing frame to lift up and fall down. When the pushing head assembly moves to the right, the pushing inclined plate contacts the inner wall of the collecting tank, and can push the sewage inside the collecting tank into the sewage outlet. However, when the pushing head assembly moves to the left, in order to avoid mutual friction between the pushing inclined plate and the inner wall of the collecting tank, the height of the pushing frame and the pushing inclined plate is raised, and then dropped when reaching the left side. In order to push the waste water inside the collecting tank into the sewage outlet, the pushing inclined plate fits tightly with the inner wall of the collecting tank. When it moves to the left, it is separated from the inner wall of the collecting tank. The force required for moving to the left is smaller, and it is easier, and will not cause excessive thrust to the collecting tank. At the same time, its movement speed is faster, so the speed of the unloading baffle is faster, and the exhaust gas is not easy to be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the tail gas treatment device containing phosgene from methyl carbamate in the present invention.

[0025] Figure 2 For the present invention Figure 1 Rear view of.

[0026] Figure 3 This is one of the schematic diagrams of the internal structure of the collection tank in the present invention.

[0027] Figure 4 This is the second schematic diagram of the internal structure of the collection tank in the present invention.

[0028] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at A in the middle.

[0029] Figure 6 For the present invention Figure 4 Schematic diagram of the structure at B in the figure.

[0030] Figure 7 For the present invention Figure 4 Schematic diagram of the structure at C in the figure.

[0031] Figure 8 For the present invention Figure 4 Rear view of.

[0032] Fig. 9 For the present invention Figure 8 Schematic diagram of the structure at D in the figure.

[0033] In the figure: 1, alkali washing tower; 2, air inlet pipe; 3, air outlet pipe; 4, alkali solution feed pipe; 5, collection tank; 501, chute; 6, treatment tank;

[0034] 7. Pushing head assembly; 701. Pushing rack; 702. Bottom plate; 703. Pushing inclined plate; 704. Lifting and lowering motor; 705. Sliding block; 8. Pushing power assembly; 801. Pushing and pulling plate; 802. Cylinder; 9. Unloading baffle; 10. Opening and closing assembly; 1001. Lifting guide block; 1002. Arc-shaped working part; 1003. Sealing seat; 1004. Pushing plate;

[0035] 11. Pushing blade; 12. Driving assembly; 1201. Transmission gear; 1202. Transmission rack; 1203. Second connecting shaft; 1204. Chain; 13. Acid solution storage box; 14. Separation plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Reference Figure 1-Figure 9 A device for treating tail gas containing phosgene from methyl carbamate comprises an alkali scrubbing tower 1, an air inlet pipe 2, and an air outlet pipe 3. The tail gas generated during the production of methyl carbamate contains a variety of harmful substances, such as MD I (toluene diisocyanate), PI (phenyl isocyanate) and chlorobenzene, phosgene is also called carbonyl chloride (dichlorocarbonyl), etc., the waste gas generated in the production process of methyl carbamate passes through the water scrubber and is sent to the inside of the alkali scrubber 1 from the air inlet pipe 2. The alkali scrubber 1 is provided with a plurality of alkali solution feeding pipes 4, and the alkali solution feeding pipes 4 are fed with atomized alkali solution. The alkali solution enters the inside of the alkali scrubber 1 from top to bottom, and the tail gas enters the alkali scrubber 1 from the air inlet pipe 2 at the bottom, and flows from bottom to top. The movement direction of the tail gas is opposite to that of the alkali solution. During the mutual movement, the alkali solution and the tail gas are mixed and fall into the collection pool 5 at the bottom. The treated tail gas enters the next processing unit from the top outlet pipe 3, wherein the alkali solution feeding pipe 4 is provided with two, and is distributed up and down. The alkali solution enters the inside of the alkali scrubber 1 in the form of upper and lower two-layer feeding, so the concentration of the alkali solution in the lower area of ​​the alkali scrubber 1 will be relatively high, and the mixing with the tail gas is mainly in this area;

[0038] The bottom of the alkali washing tower 1 is connected to the collecting pool 5, and the collecting pool 5 is connected to the treatment pool 6. The alkali solution is mixed with the tail gas and enters the collecting pool 5. A large amount of waste water adsorbing the tail gas is accumulated there and needs to be treated. Therefore, a pusher head assembly 7 is arranged in the collecting pool 5. The pusher head assembly 7 is connected to the pusher power assembly 8. The pusher power assembly 8 drives the pusher head assembly 7 to move and push the waste water in the collecting pool 5 into the treatment pool 6.

[0039] Specifically, the push head assembly 7 includes a push rack 701, the two end faces of the push rack 701 are respectively in contact with the two inner walls of the collection tank 5, a bottom plate 702 is installed at the lower end of the push rack 701, and a plurality of push inclined plates 703 inclined toward the sewage outlet are arranged at the lower end of the bottom plate 702, and the push rack 701 is connected to a lifting and lowering motor 704 for driving it to lift up or fall, and the lifting and lowering motor 704 is installed on a slider 705, and the slider 705 is connected to the slide groove in the collection tank 5. 501 is connected, the slide 501 passes through the outer wall of the collecting tank 5 near the treatment tank 6, two sliders 705 are provided, and the two sliders 705 are respectively located at the two ends of the pusher inclined plate 703; the pusher head assembly 7 is provided with a pusher inclined plate 703 and other components, so that it can fit with the lower inner wall of the collecting tank 5, and the pusher inclined plate 703 is inclined to the side close to the sewage outlet, and the lifting and falling motor 704 can drive the pusher frame 701 to lift up and fall down, such as Figure 3 As shown, when the pushing head assembly 7 moves to the right, the pushing inclined plate 703 contacts the inner wall of the collecting tank 5, and can push the sewage inside the collecting tank 5 into the sewage outlet. However, when the pushing head assembly 7 moves to the left, in order to avoid the mutual friction between the pushing inclined plate 703 and the inner wall of the collecting tank 5, the height of the pushing frame 701 and the pushing inclined plate 703 is raised, and then dropped when reaching the left side. In order to push the waste water inside the collecting tank 5 into the sewage outlet, the pushing inclined plate 703 is closely attached to the inner wall of the collecting tank 5. When moving to the left, it is separated from the inner wall of the collecting tank 5. The force required to move to the left is smaller, which is easier and will not cause excessive thrust to the collecting tank 5.

[0040] More specifically, the material pushing power assembly 8 includes a push-pull plate 801, which is inserted into the slide slot 501 and connected to the output end of the cylinder 802;

[0041] Furthermore, a material discharge baffle 9 is provided in the collection tank 5, and the material discharge baffle 9 is connected to an opening and closing assembly 10 for driving the material discharge baffle 9 to open and close. When the material discharge baffle 9 is opened, the sewage outlet leaks out, and the wastewater in the collection tank 5 can be pushed into the treatment tank 6. When the material discharge baffle 9 is closed, the sewage outlet is closed, and the wastewater in the collection tank 5 is sealed inside the collection tank 5, and the collection tank 5 is in a sealed state at this time, in order to prevent the exhaust gas from being discharged directly from the hole at the bottom and entering the surrounding atmosphere when it is introduced. When the material discharge baffle 9 is opened to the maximum angle, the bottom plate 702 is against the outer wall of the material discharge baffle 9;

[0042] Specifically, a U-shaped groove is provided at the bottom of the material discharge baffle 9, and a U-shaped sealing gasket is installed in the U-shaped groove. When the material discharge baffle 9 is closed, the U-shaped sealing gasket is against the inner wall of the collection tank 5. The opening and closing assembly 10 includes a lifting guide block 1001 and a push plate 1004. The lifting guide block 1001 is located on the material discharge baffle 9, and the lifting guide block 1001 is connected to the sealing seat 1003 through a rotating shaft. Figure 3 As shown, the lifting guide block 1001 and the sealing seat 1003 can rotate relative to each other, and the connection position between the two is sealed, which is to separate the sewage outlet from the main part of the collection tank 5 to avoid exhaust gas leakage;

[0043] More specifically, the lifting guide block 1001 is provided with an arc-shaped working portion 1002 on one side close to the push head assembly 7, the center of the arc-shaped working portion 1002 coincides with the center line of the rotating shaft, the push plate 1004 is provided on the push head assembly 7, and the lifting guide block 1001 is aligned with the push plate 1004; when the push plate 1004 moves to the position of the lifting guide block 1001, it continues to move to the right side, which will squeeze the lifting guide block 1001 to make it rotate around the rotating shaft toward the upper side, at this time, a gap is generated between the unloading baffle plate 9 and the inner wall of the collection tank 5, and the wastewater enters the sewage outlet through the gap and is finally discharged from the sewage outlet; a torsion spring can be installed at the unloading baffle plate 9, and the torsion spring provides a force to make the unloading baffle plate 9 fit the inner wall of the collection tank 5;

[0044] Furthermore, a pusher blade 11 is provided at the position of the collection tank 5 corresponding to the sewage outlet, and the pusher blade 11 is connected to a driving assembly 12 for driving the pusher blade 11 to rotate. When the pusher blade 11 rotates, it can push the sewage to flow and prevent the sewage from staying at the sewage outlet.

[0045] It should be noted that the drive assembly 12 includes a transmission gear 1201 and a transmission rack 1202. One end of the transmission rack 1202 is connected to the push-pull plate 801, and the other end is connected to the output end of the cylinder 802. The transmission rack 1202 is connected to the transmission gear 1201 through tooth meshing transmission. A first connecting shaft is inserted at the center of the transmission gear 1201. The first connecting shaft is connected to the second connecting shaft 1203 through the first gear and the second gear. The second connecting shaft 1203 is arranged on the mounting seat through a bearing. The second connecting shaft 1203 is connected to the push blade 11 through a sprocket and a chain 1204. Specifically, the push blade 11 An intermediate shaft is inserted in the middle position, and the intermediate shaft is inserted into the power cavity. Sprockets are installed on the second connecting shaft 1203 and the intermediate shaft. The two sprockets are connected by a chain 1204. The chain 1204 is located in the power cavity. The cylinder 802 pulls the transmission rack 1202 to move, thereby driving the transmission gear 1201 to rotate. The transmission gear 1201 adjusts the rotation mode of the second connecting shaft 1203 through the first gear and the second gear. After that, the second connecting shaft 1203 is connected to the push blade 11 through the sprocket and the chain 1204. The rotation of the push blade 11 can push the sewage to flow and prevent it from being blocked at the sewage outlet;

[0046] It should be noted that an acid solution storage box 13 is provided at the treatment tank 6. The acid solution storage box 13 is connected to a feed pipe inserted into the bottom of the treatment tank 6. The feed pipe is inserted into the side of the separation plate 14 close to the collection tank 5. The acid solution is mixed with the alkaline solution. After the wastewater is neutralized, the solid waste therein is isolated by the separation plate 14, and the filtered wastewater is in the right area of ​​the treatment tank 6.

[0047] Working principle:

[0048] The tail gas discharged from the water scrubber enters the alkali scrubber 1 through the air inlet pipe 2, and the atomized alkali solution is introduced into the alkali scrubber 1 from the alkali solution feed pipe 4. The tail gas and the alkali solution are mixed and enter the collection tank 5, and the remaining tail gas is discharged from the air outlet pipe 3;

[0049] When it is necessary to discharge the sewage in the collection tank 5, the pushing head assembly 7 is driven by the pushing power assembly 8 to move the sewage to the side close to the sewage outlet. When the pushing plate 1004 moves to the position of the lifting guide block 1001, it continues to move to the right, squeezing the lifting guide block 1001 to make it rotate around the rotation axis toward the upper side. At this time, a gap is generated between the unloading baffle 9 and the inner wall of the collection tank 5, and the wastewater enters the sewage outlet through the gap and is finally discharged from the sewage outlet. After the sewage enters the treatment tank 6, it is mixed with the acidic solution to neutralize the alkaline substances in the wastewater.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for treating tail gas containing phosgene from methyl carbamate, comprising an alkali scrubber (1), an air inlet pipe (2), and an air outlet pipe (3), characterized in that: The alkali washing tower (1) is provided with a plurality of alkali solution feed pipes (4); The bottom of the alkali washing tower (1) is connected to a collecting tank (5), the collecting tank (5) is connected to a treatment tank (6), a pushing head assembly (7) is arranged in the collecting tank (5), the pushing head assembly (7) is connected to a pushing power assembly (8), and the pushing power assembly (8) drives the pushing head assembly (7) to move, so as to push the wastewater in the collecting tank (5) into the sewage outlet; A material discharge baffle (9) is arranged in the collection pool (5), and the material discharge baffle (9) is connected to an opening and closing assembly (10) for driving the material discharge baffle (9) to open and close. When the material discharge baffle (9) is opened to a maximum angle, the bottom plate (702) abuts against the outer wall of the material discharge baffle (9); A pushing blade (11) is provided at a position of the collection tank (5) corresponding to the sewage outlet, and the pushing blade (11) is connected to a driving component (12) for driving the pushing blade (11) to rotate; The treatment tank (6) is provided with an acid solution storage box (13), which is connected to a feed pipe inserted into the bottom of the treatment tank (6), and the feed pipe is inserted into a side of the separation plate (14) close to the collection tank (5).

2. A methyl carbamate phosgene-containing tail gas treatment device according to claim 1, characterized in that: The pusher head assembly (7) comprises a pusher frame (701), the two end faces of which are respectively in contact with the two inner walls of the collection tank (5), a bottom plate (702) is installed at the lower end of the pusher frame (701), and a plurality of pusher inclined plates (703) inclined toward the sewage outlet are arranged at the lower end of the bottom plate (702), and the pusher frame (701) is connected to a lifting and lowering motor (704) for driving it to lift up or fall, and the lifting and lowering motor (704) is installed on a slider (705).

3. A methyl carbamate phosgene-containing tail gas treatment device according to claim 2, characterized in that: The slider (705) is connected to the slide groove (501) in the collection tank (5), and the slide groove (501) passes through the outer wall of the collection tank (5) on the side close to the treatment tank (6). Two sliders (705) are provided, and the two sliders (705) are respectively located at the two ends of the pusher inclined plate (703).

4. The device for treating tail gas containing phosgene from methyl carbamate according to claim 1, characterized in that: The material pushing power assembly (8) comprises a push-pull plate (801), which is inserted into the slide groove (501) and connected to the output end of the cylinder (802).

5. The device for treating tail gas containing phosgene from methyl carbamate according to claim 1, characterized in that: The bottom of the material discharge baffle (9) is provided with a U-shaped groove, and a U-shaped sealing gasket is installed in the U-shaped groove. When the material discharge baffle (9) is closed, the U-shaped sealing gasket abuts against the inner wall of the collection tank (5).

6. The device for treating tail gas containing phosgene from methyl carbamate according to claim 1, characterized in that: The opening and closing assembly (10) comprises a lifting guide block (1001) and a pushing plate (1004); the lifting guide block (1001) is located on the unloading baffle plate (9); the lifting guide block (1001) is connected to the sealing seat (1003) via a rotating shaft; an arc-shaped working portion (1002) is provided on the side of the lifting guide block (1001) close to the pushing head assembly (7); the center of the arc-shaped working portion (1002) coincides with the center line of the rotating shaft; the pushing plate (1004) is provided on the pushing head assembly (7), and the lifting guide block (1001) is aligned with the pushing plate (1004).

7. The device for treating tail gas containing phosgene from methyl carbamate according to claim 1, characterized in that: The driving assembly (12) comprises a transmission gear (1201) and a transmission rack (1202); one end of the transmission rack (1202) is connected to the push-pull plate (801), and the other end is connected to the output end of the cylinder (802); the transmission rack (1202) is connected to the transmission gear (1201) through tooth meshing transmission.

8. The device for treating tail gas containing phosgene from methyl carbamate according to claim 7, characterized in that: A first connecting shaft is inserted at the center of the transmission gear (1201), and the first connecting shaft is connected to the second connecting shaft (1203) through the first gear and the second gear. The second connecting shaft (1203) is arranged on the mounting seat through a bearing, and the second connecting shaft (1203) is connected to the push blade (11) through a sprocket and a chain (1204).

9. A methyl carbamate phosgene-containing tail gas treatment device according to claim 8, characterized in that: An intermediate shaft is inserted in the middle of the push blade (11), and the intermediate shaft is inserted into the power chamber. Sprockets are installed on the second connecting shaft (1203) and the intermediate shaft. The two sprockets are connected by a chain (1204), and the chain (1204) is located in the power chamber.

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