Mercuric chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production

Abstract

The invention discloses a mercuric chloride catalyst pumping and loading and waste gas treatment device for polyvinyl chloride production, and relates to the technical field of polyvinyl chloride production equipment.The mercuric chloride catalyst pumping and loading and waste gas treatment device comprises a first fixing plate, a converter reaction pipe, a first fixing frame, a bearing box, a waste liquid collecting pool, a waste liquid neutralizing pool and a mounting plate; by arranging the first sliding rail, the second sliding rail, the servo motor, the air cylinder and other components, automatic positioning and lifting of the suction pipe are achieved, the butt joint accuracy of the suction pipe and the converter reaction pipe is improved in cooperation with the machine vision camera and the inertial measurement unit, meanwhile, the connection sealing performance can be ensured through an annular pressure sensor and a sealing gasket, and the production efficiency is improved. The catalyst pumping and loading efficiency is improved, through mechanical pumping and loading of the mercuric chloride catalyst, the problem of environmental pollution caused by manual overturning of the catalyst is solved, harm to human health caused by dissipation of mercury-containing catalyst dust is reduced, manual operation is replaced by the machine, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of polyvinyl chloride production equipment, in particular to a mercury chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production. Background Art

[0002] Mercuric chloride catalyst is a key catalyst for the vinyl chloride synthesis reaction in polyvinyl chloride production. Its main component is mercuric chloride, which can effectively promote the addition reaction of acetylene and hydrogen chloride. During the continuous production process of polyvinyl chloride, the mercuric chloride catalyst will need to be replaced regularly due to its gradual decrease in activity.

[0003] Traditional catalyst replacement mostly adopts manual extraction and loading. When the catalyst is manually overturned, mercury-containing dust and exhaust gas directly escape into the workshop, causing the mercury vapor concentration to exceed the standard and pollute the production environment. Operators are exposed to the mercury-containing environment for a long time, which can easily cause chronic mercury poisoning and damage their health. At the same time, catalyst extraction requires frequent handling of heavy converter components, and manual operation is inefficient and labor-intensive. Therefore, a mercury chloride catalyst extraction and exhaust gas treatment device for polyvinyl chloride production is proposed to solve the above problems. Summary of the Invention

[0004] In order to solve the above technical problems, a mercury chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production is provided. This technical solution solves the problems proposed in the above background technology that traditional catalyst replacement mostly adopts manual extraction and loading. When the catalyst is manually overturned, mercury-containing dust and waste gas directly escape into the workshop, causing the mercury vapor concentration to exceed the standard and pollute the production environment. In addition, the operators are exposed to the mercury-containing environment for a long time, which is prone to chronic mercury poisoning and damage to their health. At the same time, the catalyst extraction requires frequent handling of heavy converter components, and the manual operation efficiency is low and the labor intensity is high.

[0005] In order to achieve the above objects, the technical solution adopted by the present invention is:

[0006] A mercury chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production, comprising a first fixed plate, a converter reaction tube, a first fixed frame, a carrying box, a waste liquid collection tank, a waste liquid neutralization tank and a mounting plate, wherein the inner side of the first fixed plate is fixedly connected with a suction pipe, the lower end of the suction pipe is plugged into the interior of the converter reaction tube, the upper end of the suction pipe is fixedly connected with a threaded joint, the upper end of the mounting plate is fixedly mounted with a centrifugal pump, the input end of the centrifugal pump is fixedly connected with a negative pressure pipe, the other end of the negative pressure pipe passes through the upper end of the mounting plate and is threadedly connected to the upper end of the threaded joint, the inner side of the first fixed frame is fixedly connected with a cyclone separator, the outer The surface is connected to a feed pipe, the upper end of the cyclone separator is connected to an air outlet pipe, the lower end of the cyclone separator is connected to a discharge pipe, the other end of the feed pipe is connected to a delivery pipe, the other end of the delivery pipe is fixedly connected to the output end of the centrifugal pump, the other end of the discharge pipe is connected to a screening box, the screening box is fixedly connected to the inner side of the first fixed frame, the upper end of the carrying box is fixedly connected to a dust removal bucket, the other end of the air outlet pipe is connected to an air delivery pipe, the other end of the air delivery pipe is connected to the interior of the dust removal bucket, the upper end of the waste liquid collection tank is fixedly connected to a spray tank, the outer surface of the dust removal bucket is connected to a delivery pipe on the side away from the air delivery pipe, and the other end of the delivery pipe is connected to the interior of the spray tank.

[0007] Preferably, the outer surface of the suction tube is fixedly connected to a support plate located on the lower side of the first fixed plate, an annular pressure sensor is fixedly installed on the lower end of the support plate, a sealing gasket is fixedly connected to the lower end of the annular pressure sensor, and the lower end of the sealing gasket abuts the upper end of the converter reaction tube.

[0008] The top end of the lifting plate is fixedly provided with a first slide rail, and the bottom end of the lifting plate is fixedly provided with a first screw rod, and the front end of the first slide rail is fixedly installed with a first servo motor for driving the first screw rod to rotate. The outer surface of the first screw rod is threadedly connected to the first slide, and the first slide is slidably connected to the inside of the first slide rail. The upper end of the two first slide rails is fixedly connected to the second slide rail, and the inner surface of the second slide rail is rotatably connected to the second screw rod. The right end of the second slide rail is fixedly installed with a second servo motor for driving the second screw rod to rotate.

[0009] Preferably, the lower end of the support seat is fixedly connected to two symmetrically distributed guide rods, the lower ends of the guide rods are fixedly connected to limit blocks, the lifting seat is slidably connected to the outer surface of the guide rods, an inertial measurement unit is embedded in the center of the lower end of the lifting seat, the left end of the first fixed plate is fixedly connected to a camera mounting seat, a machine vision camera is fixedly installed on the inner side of the camera mounting seat, and the machine vision camera is tilted toward the direction of the suction tube.

[0010] Preferably, a telescopic slot is provided on the right inner wall of the screening box, and a first discharge port is provided through the left inner wall of the screening box at the lower side of the telescopic slot, and a second discharge port is provided through the right inner wall of the screening box at the lower side of the first discharge port, and the inner bottom ends of the telescopic slot, the first discharge port and the second discharge port are fixedly connected to a number of evenly distributed springs, the upper ends of the upper springs are fixedly connected to a T-shaped stopper, and the upper ends of the two lower springs are fixedly connected to a U-shaped stopper, a sieve plate is fixedly connected between the T-shaped stopper and the U-shaped stopper on the left, and a receiving plate is fixedly connected between the U-shaped stopper on the left and the U-shaped stopper on the right, and a dust cover and a collection box are fixedly connected at the corresponding positions of the left and right ends of the screening box and the first and second discharge ports, the lower end of the dust cover is fixedly connected to the upper end of the collection box, and the rear end of the collection box is plugged with a second collection box.

[0011] Preferably, a material guide plate is fixedly connected to the inner top of the screening box, and the material guide plate is inclined in the direction of the telescopic slot. The inside of the telescopic slot is rotatably connected to a rotating shaft, and the outer surface of the rotating shaft is fixedly connected to an eccentric wheel. The rear end of the screening box is fixedly installed with a third servo motor for driving the rotating shaft to rotate.

[0012] Preferably, the interior of the dust collector is fixedly connected to a second fixing plate, and the upper end of the second fixing plate is penetrated by a plurality of evenly distributed through grooves, the interior of the through grooves is fixedly connected to a support tube, the outer surface of the support tube is located at the lower side of the second fixing plate, and is penetrated by a plurality of evenly distributed strip ventilation grooves, the upper end of the support tube is penetrated by an air outlet, and the outer side of the support tube is tightened with a PTFE-coated filter bag by a cable tie, the top inner side of the dust collector is fixedly connected to a porous plate, the lower end of the porous plate is connected to an injection tube with the same number as the support tube, the lower end of the injection tube extends to the interior of the air outlet, the upper end of the porous plate is connected to an air supply pipe, the other end of the air supply pipe penetrates the upper end of the dust collector and extends to the upper side of the dust collector, a second solenoid valve is provided on the air supply pipe, and the rear end of the carrying box is plugged with a first collecting box.

[0013] Preferably, a second liquid pump is fixedly installed at the upper end of the waste liquid collection tank, the input end of the second liquid pump is fixedly connected to a liquid suction pipe, the output end of the second liquid pump is fixedly connected to a liquid supply pipe, and the other end of the liquid supply pipe passes through the outer surface of the spray tank and is fixedly connected to a spiral nozzle.

[0014] Preferably, the interior of the spray tank is located at the lower side of the spiral nozzle and is fixedly connected to a second fixing bracket, the upper end of the second fixing bracket is penetrated with a plurality of mounting grooves, the interior of the mounting groove is fixedly connected with a ball ring, the interior of the spray tank is located at the upper side of the spiral nozzle and is fixedly connected with a wire mesh demister, and the upper end of the spray tank is penetrated with an exhaust port.

[0015] Preferably, the front end of the waste liquid collection tank is connected to a liquid outlet pipe, the other end of the liquid outlet pipe is fixedly connected to a first liquid pump, the output end of the first liquid pump is fixedly connected to an infusion pipe, the other end of the infusion pipe is connected to the front end of the waste liquid neutralization tank, and a first solenoid valve is provided on the infusion pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This proposal proposes a mercury chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production. By setting up a first slide rail, a second slide rail, a servo motor, a cylinder and other components, the automatic positioning and lifting of the suction pipe are realized. In conjunction with the machine vision camera and the inertial measurement unit, the accuracy of the docking between the suction pipe and the converter reaction tube is improved. At the same time, the annular pressure sensor and the sealing gasket can ensure the sealing of the connection, thereby improving the catalyst extraction efficiency. At the same time, through the mechanized extraction of mercury chloride catalyst, the environmental pollution problem caused by coal catalyst leakage during manual extraction is solved, and the harm to human health caused by the escape of mercury-containing catalyst dust is reduced. Machines are used instead of people, reducing the labor intensity of staff.

[0018] In this solution, a screen plate and a receiving plate are provided in the screening box, and vibration screening is achieved through an eccentric wheel and a spring, which can effectively grade and recycle the catalyst, thereby improving resource utilization. At the same time, the dust cover can prevent dust from overflowing during the screening process. The waste gas treatment adopts a multi-stage treatment method of a dust removal barrel and a spray tank. The PTFE-coated filter bag in the dust removal barrel can effectively remove dust, the spiral nozzle and ball ring in the spray tank can fully absorb harmful substances in the waste gas, and the wire mesh demister can remove droplets in the gas. The synergistic effect of multiple components improves the waste gas treatment effect and reduces pollution to the environment. The setting of the waste liquid collection pool and the waste liquid neutralization pool can collect and neutralize the waste liquid generated in the waste gas treatment process, thereby avoiding secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the present invention from another perspective;

[0021] Figure 3 It is a rear view of the present invention;

[0022] Figure 4 Schematic diagram of the structure of the suction pipe in the present invention;

[0023] Figure 5 for Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0024] Figure 6 for Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0025] Figure 7 This is a schematic diagram of the connection of the first fixing plate in the present invention;

[0026] Figure 8 Schematic diagram of the structure of the first guide rail and the second guide rail in the present invention;

[0027] Figure 9 It is a structural schematic diagram of the lifting seat in the present invention;

[0028] Figure 10 It is a structural diagram of the screening box in the present invention;

[0029] Figure 11 This is a schematic diagram of the structure of the dust removal barrel in the present invention;

[0030] Figure 12 for Figure 11 A partial enlarged schematic diagram of point C in the middle;

[0031] Figure 13 It is a structural schematic diagram of the spray tank in the present invention.

[0032] The numbers in the figure are:

[0033] 1. First fixing plate; 2. Converter reaction tube; 3. First fixing frame; 4. Carrying box; 401. First collecting box; 5. Waste liquid collection tank; 6. Waste liquid neutralization tank; 7. Suction pipe; 8. Threaded joint; 9. Support plate; 10. Annular pressure sensor; 11. Sealing gasket; 12. Mounting plate; 13. Centrifugal pump; 14. Negative pressure pipe; 15. Cyclone separator; 1501. Feed pipe; 1502. Exhaust pipe; 1503. Discharge pipe; 16. Feeding pipe; 17, screening box; 18, dust removal barrel; 1801, air pipe; 19, spray tank; 20, delivery pipe; 21, liquid outlet pipe; 22, first liquid pump; 23, liquid delivery pipe; 24, first solenoid valve; 25, lifting seat; 26, fixed seat; 27, first slide rail; 28, first screw rod; 2801, first servo motor; 29, first slide; 30, second slide rail; 31, second screw rod; 32, second slide; 33, connecting plate; 34, first Second servo motor; 35. Support base; 36. Cylinder; 37. Guide rod; 38. Stop block; 39. Inertial measurement unit; 40. Camera mounting base; 41. Machine vision camera; 42. Material guide plate; 43. Telescopic slot; 44. First discharge port; 45. Second discharge port; 46. Spring; 47. T-shaped stop block; 48. U-shaped stop block; 49. Screen plate; 50. Material receiving plate; 51. Dust cover; 52. Collection box; 53. Second collection box; 54. Rotating shaft ; 55. Eccentric wheel; 56. Third servo motor; 57. Second fixed plate; 58. Support tube; 59. Strip ventilation groove; 5901. Air outlet; 60. PTFE coated filter bag; 61. Perforated plate; 62. Air supply pipe; 63. Second solenoid valve; 64. Jet pipe; 65. Second liquid extraction pump; 66. Liquid supply pipe; 67. Spiral nozzle; 68. Liquid extraction pipe; 69. Second fixed frame; 70. Ball ring; 71. Wire mesh demister; 72. Exhaust port. DETAILED DESCRIPTION

[0034] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0035] Reference Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7As shown, a mercury chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production includes a first fixed plate 1, a converter reaction tube 2, a first fixed frame 3, a carrying box 4, a waste liquid collection tank 5, a waste liquid neutralization tank 6 and a mounting plate 12. The inner side of the first fixed plate 1 is fixedly connected with a suction pipe 7, the lower end of the suction pipe 7 is inserted into the interior of the converter reaction tube 2, the upper end of the suction pipe 7 is fixedly connected with a threaded joint 8, the upper end of the mounting plate 12 is fixedly installed with a centrifugal pump 13, the input end of the centrifugal pump 13 is fixedly connected with a negative pressure pipe 14, the other end of the negative pressure pipe 14 passes through the upper end of the mounting plate 12 and is threadedly connected to the upper end of the threaded joint 8, the inner side of the first fixed frame 3 is fixedly connected with a cyclone separator 15, the outer surface of the cyclone separator 15 is connected with a feed pipe 1501, and the cyclone separator The upper end of the device 15 is connected to the air outlet pipe 1502, the lower end of the cyclone separator 15 is connected to the discharge pipe 1503, the other end of the feed pipe 1501 is connected to the delivery pipe 16, the other end of the delivery pipe 16 is fixedly connected to the output end of the centrifugal pump 13, the other end of the discharge pipe 1503 is connected to the screening box 17, the screening box 17 is fixedly connected to the inner side of the first fixed frame 3, the upper end of the carrying box 4 is fixedly connected to the dust removal bucket 18, the other end of the air outlet pipe 1502 is connected to the air delivery pipe 1801, the other end of the air delivery pipe 1801 is connected to the interior of the dust removal bucket 18, the upper end of the waste liquid collection tank 5 is fixedly connected to the spray tank 19, the outer surface of the dust removal bucket 18 away from the air delivery pipe 1801 is connected to the delivery pipe 20, the other end of the delivery pipe 20 is connected to the interior of the spray tank 19.

[0036] Furthermore, the converter reaction tube 2 serves as a place for catalytic reaction, providing space for catalyst storage and reaction. There are multiple converter reaction tubes 2, and the multiple converter reaction tubes 2 are evenly distributed in the converter shell to ensure that the reaction proceeds fully.

[0037] Furthermore, the outer surface of the suction tube 7 is fixedly connected to a support plate 9 on the lower side of the first fixed plate 1, and an annular pressure sensor 10 is fixedly installed on the lower end of the support plate 9. The lower end of the annular pressure sensor 10 is fixedly connected to a sealing gasket 11, and the lower end of the sealing gasket 11 abuts against the upper end of the converter reaction tube 2.

[0038] Specifically, the suction pipe 7 is used to dock with the converter reaction tube 2 and can be movably inserted into the converter reaction tube 2 to achieve communication between the device and the converter reaction tube 2. The centrifugal pump 13 is the power source for catalyst pumping and provides power for the entire catalyst extraction and transportation process. After the centrifugal pump 13 is started, a negative pressure is formed in the suction pipe 7 through the negative pressure pipe 14 to extract the catalyst from the converter reaction tube 2. The extracted catalyst is transported to the cyclone separator 15 through the feed pipe 16. The threaded joint 8 realizes the detachable connection between the suction pipe 7 and the negative pressure pipe 14, which is convenient for the installation, maintenance and replacement of components. The support plate 9 is fixed to the outer surface of the suction pipe 7 to provide a pressure sensor for the annular pressure sensor 10. Provide an installation support surface. When the suction tube 7 is fully inserted into the interior of the converter reaction tube 2, the lower end of the sealing gasket 11 abuts against the upper end of the converter reaction tube 2 to play a sealing role. The annular pressure sensor 10 is installed at the lower end of the support plate 9 and is electrically connected to the external control system to detect the pressure between the sealing gasket 11 and the converter reaction tube 2 and transmit the pressure signal to the control system. When the suction tube 7 is docked with the converter reaction tube 2, the pressure is analyzed by the external control system to ensure that the sealing gasket 11 is tightly fitted with the converter reaction tube 2, thereby preventing gas leakage and catalyst scattering during the catalyst extraction and loading process.

[0039] Furthermore, the cyclone separator 15 is used to receive the catalyst and gas mixture from the feed pipe 16. The cylinder adopts a conical structure design. The catalyst and gas mixture enter the cyclone separator 15 along the tangential direction through the feed pipe 16 and the feed pipe 1501 to form a high-speed rotating airflow. Under the action of centrifugal force, the catalyst particles are thrown to the cylinder wall of the cyclone separator 15 and slide along the wall. The separated catalyst enters the screening box 17 from the discharge pipe 1503, and the gas enters the dust removal barrel 18 from the outlet pipe 1502, thereby realizing the preliminary separation of the catalyst and the gas.

[0040] Reference Figure 1 and Figure 5-Figure 9As shown, a first slide rail 27 is provided on both sides of the mounting plate 12, and a first screw rod 28 is rotatably connected to the interior of the first slide rail 27. A first servo motor 2801 for driving the first screw rod 28 to rotate is fixedly installed at the front end of the first slide rail 27. A first slide seat 29 is threadedly connected to the outer surface of the first screw rod 28. The first slide seat 29 is slidably connected to the interior of the first slide rail 27. The upper ends of the two first slide seats 29 are fixedly connected to the second slide rail 30. The interior of the second slide rail 30 is rotatably connected to the second screw rod 31. The right end of the second slide rail 30 is fixedly installed with a second screw rod 31 for driving the second screw rod 31 to rotate. The second servo motor 34 and the outer surface of the second screw rod 31 are threadedly connected to the second slide 32, and the second slide 32 is slidably connected to the inside of the second slide rail 30. The upper end of the second slide 32 is fixedly connected to the connecting plate 33, and the front end of the connecting plate 33 is fixedly connected to the support seat 35. The upper end of the support seat 35 is fixedly installed with a cylinder 36, and the output end of the cylinder 36 passes through the upper end of the support seat 35 and is fixedly connected to the lifting seat 25. The mounting plate 12 is fixedly connected to the right end of the lifting seat 25, and the lower end of the lifting seat 25 is fixedly connected to the fixed seat 26. The first fixed plate 1 is fixedly connected to the lower end of the fixed seat 26.

[0041] Furthermore, the lower end of the support seat 35 is fixedly connected to two symmetrically distributed guide rods 37, the lower ends of the guide rods 37 are fixedly connected to the limit blocks 38, the lifting seat 25 is slidably connected to the outer surface of the guide rods 37, and an inertial measurement unit 39 is embedded in the center of the lower end of the lifting seat 25. The left end of the first fixed plate 1 is fixedly connected to the camera mounting seat 40, and a machine vision camera 41 is fixedly installed on the inner side of the camera mounting seat 40. The machine vision camera 41 is tilted toward the direction of the suction tube 7.

[0042] Specifically, the first slide rail 27 provides a track for the sliding of the first slide 29, limits the moving direction of the first slide 29, ensures that the first slide 29 drives the second slide rail 30 to move smoothly, and the first servo motor 2801 provides power for the rotation of the first screw rod 28. The first screw rod 28 rotates under the drive of the first servo motor 2801, and drives the first slide 29 to slide in the first slide rail 27 by cooperating with the thread of the first slide 29, thereby realizing the forward and backward movement of the second slide rail 30, thereby realizing the forward and backward movement of the suction tube 7. The first servo motor 2801 realizes the forward and backward movement and movement speed of the first slide 29 by controlling its forward and reverse rotation and speed. The second servo motor 34 provides power for the rotation of the second screw rod 31. The second screw rod 31 rotates under the drive of the second servo motor 34 and drives the second slide 32 to slide in the second slide rail 30 through the threaded engagement with the second slide 32, thereby realizing the left and right movement of the support seat 35, thereby realizing the left and right movement of the suction tube 7. The second servo motor 34 realizes the left and right movement and movement speed of the second slide 32 by controlling its forward and reverse rotation and speed.

[0043] The support seat 35 is used to support the cylinder 36 and the guide rod 37, providing a stable foundation for the installation and operation of the cylinder 36. At the same time, it moves with the second slide 32 and the first slide 29, driving the entire extraction structure to move. The cylinder 36 is used to drive the lifting seat 25 to move up and down to realize the lifting and lowering of the suction tube 7. By controlling its expansion and contraction amount, the insertion depth of the suction tube 7 can be adjusted, thereby controlling the pressure between the sealing gasket 11 and the converter reaction tube 2. The lifting seat 25 moves up and down under the drive of the cylinder 36, driving the mounting plate 12, the fixing seat 26 and the first fixing plate 1 to rise and fall synchronously to realize the lifting and lowering of the suction tube 7. The guide rod 37 provides guidance for the lifting and lowering of the lifting seat 25, limits the moving direction of the lifting seat 25, prevents the lifting seat 25 from offsetting during the lifting process, and ensures the vertical lifting of the suction tube 7.

[0044] The inertial measurement unit 39 is used to detect the movement state of the lifting seat 25 and is connected to the control system through a built-in wireless communication module. The detection data of the inertial measurement unit 39 is transmitted to the control system through the wireless module, so that the control system can adjust the operation of the first servo motor 2801, the second servo motor 34 and the cylinder 36 to ensure the precise positioning of the suction tube 7. The camera mounting bracket 40 is used to fix the machine vision camera 41 to ensure that the shooting angle and position of the machine vision camera 41 are stable, providing a reliable installation basis for the operation of the machine vision camera 41. The machine vision camera 41 is used to capture the position image of the lower end connection of the suction tube 7 and transmit the image information to the control system. The control system calculates the moving path of the suction tube 7 based on the image information, and cooperates with the inertial measurement unit 39 to achieve precise docking of the suction tube 7. The specific structure of the inertial measurement unit 39 can adopt any structure in the existing technology that can realize the positioning function through measurement, which will not be repeated here.

[0045] Reference Figure 1-Figure 3 and Figure 10 As shown, a telescopic slot 43 is provided on the right inner wall of the screening box 17, a first discharge port 44 is provided through the left inner wall of the screening box 17 located below the telescopic slot 43, and a second discharge port 45 is provided through the right inner wall of the screening box 17 located below the first discharge port 44. The inner bottom ends of the telescopic slot 43, the first discharge port 44 and the second discharge port 45 are all fixedly connected to a plurality of evenly distributed springs 46, the upper end of the upper spring 46 is fixedly connected to a T-shaped stopper 47, and the two lower springs 46 are fixedly connected to the lower end of the first discharge port 44. The upper ends of the screening box 17 are fixedly connected with a U-shaped stopper 48, a sieve plate 49 is fixedly connected between the T-shaped stopper 47 and the left U-shaped stopper 48, and a material receiving plate 50 is fixedly connected between the left U-shaped stopper 48 and the right U-shaped stopper 48. The left and right ends of the screening box 17 are fixedly connected with a dust cover 51 and a collection box 52 at the corresponding positions of the first discharge port 44 and the second discharge port 45. The lower end of the dust cover 51 is fixedly connected to the upper end of the collection box 52, and the rear end of the collection box 52 is plugged with a second collection box 53.

[0046] Furthermore, a material guide plate 42 is fixedly connected to the inner top of the screening box 17, and the material guide plate 42 is inclined in the direction of the telescopic slot 43. The interior of the telescopic slot 43 is rotatably connected to a rotating shaft 54, and the outer surface of the rotating shaft 54 ​​is fixedly connected to an eccentric wheel 55. The rear end of the screening box 17 is fixedly installed with a third servo motor 56 for driving the rotating shaft 54 ​​to rotate.

[0047] Specifically, the screening box 17 is used to receive the catalyst delivered by the discharge pipe 1503, and the catalyst is screened by the vibration of the screen plate 49 and the receiving plate 50 inside, and the catalysts of different particle sizes are separated and discharged through the first discharge port 44 and the second discharge port 45 to achieve graded recovery of the catalyst. The guide plate 42 is used to guide the catalyst entering the screening box 17 to move toward the upper end of the inclined surface of the screen plate 49 to ensure that the catalyst can stay on the screen plate 49 for a sufficient time so as to be fully screened. The telescopic slot 43 provides space for the movement of the T-shaped stopper 47. During the vibration process of the screen plate 49, the catalyst is discharged from the screen plate 49. In the figure, the T-shaped stopper 47 can move up and down in the telescopic groove 43, and cooperate with the spring 46 to realize the vibration of the screen plate 49. The first discharge port 44 and the second discharge port 45 respectively discharge the catalyst of different particle sizes after screening out of the screening box 17. By cooperating with the dust cover 51 and the collection box 52, the catalyst is collected to prevent the catalyst from scattering and causing pollution and waste. During the screening process, the spring 46 provides elastic support for the T-shaped stopper 47 and the U-shaped stopper 48. When the eccentric wheel 55 rotates, the spring 46 deforms, driving the screen plate 49 and the receiving plate 50 to vibrate, thereby realizing the screening of the catalyst.

[0048] The T-shaped stopper 47 connects the sieve plate 49 and the spring 46, and moves up and down under the action of the eccentric wheel 55, driving the sieve plate 49 to vibrate. At the same time, its T-shaped structure can form a shielding to prevent the catalyst from entering the interior of the telescopic groove 43 during the screening process. The U-shaped stopper 48 supports the sieve plate 49 and the receiving plate 50, and moves up and down with the spring 46 during the vibration process, driving the sieve plate 49 and the receiving plate 50 to vibrate synchronously, ensuring the stability of the screening process and preventing the catalyst from entering the area where the spring 46 is located.

[0049] The rotating shaft 54 ​​rotates under the drive of the third servo motor 56, driving the eccentric wheel 55 to rotate. The eccentric structure of the eccentric wheel 55 generates a periodic force on the T-shaped stopper 47 during the rotation process, so that the T-shaped stopper 47 moves up and down, and cooperates with the spring 46 to realize the vibration of the screen plate 49 and the receiving plate 50. By controlling the speed of the third servo motor 56, the vibration frequency of the screen plate 49 and the receiving plate 50 can be adjusted to meet different screening requirements. During the vibration process, the screen plate 49 screens out the catalyst with the required particle size in the catalyst and drops it onto the receiving plate 50, while the catalyst that does not meet the requirements remains on the screen plate 49, thereby realizing the classification of the catalyst. The receiving plate 50 receives the catalyst. The catalyst sieved out by the sieve plate 49 is transported to the second discharge port 45 for discharge under the action of vibration. Its tilt angle design is conducive to the transportation of the catalyst. The dust cover 51 covers the first discharge port 44 and the second discharge port 45 to prevent the catalyst from generating dust overflow during the discharge process and reduce the pollution to the processing environment. The collection box 52 is used to receive the catalyst discharged from the first discharge port 44 and the second discharge port 45. The catalyst is collected and stored through the second collection box 53 for subsequent processing and reuse. The second collection box 53 is inserted into the collection box 52 and can be easily withdrawn from the collection box 52 to facilitate the transfer and processing of the catalyst.

[0050] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 11 and Figure 12 As shown, the interior of the dust collector 18 is fixedly connected to a second fixing plate 57, and a plurality of evenly distributed through grooves are opened through the upper end of the second fixing plate 57. A support tube 58 is fixedly connected to the interior of the through groove. The outer surface of the support tube 58 is located on the lower side of the second fixing plate 57, and a plurality of evenly distributed strip-shaped ventilation grooves 59 are opened through it. An air outlet 5901 is opened through the upper end of the support tube 58. A PTFE-coated filter bag 60 is fastened to the outside of the support tube 58 by a tie. The inner top end of the dust bucket 18 is fixedly connected to a porous plate 61, and the lower end of the porous plate 61 is connected to an injection pipe 64 with the same number as the support pipe 58. The lower end of the injection pipe 64 extends to the interior of the air outlet 5901, and the upper end of the porous plate 61 is connected to an air supply pipe 62. The other end of the air supply pipe 62 passes through the upper end of the dust bucket 18 and extends to the upper side of the dust bucket 18. A second solenoid valve 63 is provided on the air supply pipe 62, and the rear end of the carrying box 4 is plugged with a first collection box 401.

[0051] Specifically, the dust removal barrel 18 is used to carry out dust reduction treatment on the gas separated by the cyclone separator 15, and the second fixing plate 57 is used to fix the support tube 58 to ensure the stable installation of the support tube 58 in the dust removal barrel 18. The support tube 58 provides a reliable support base for the PTFE coated filter bag 60. The strip-shaped ventilation grooves 59 and the air outlet holes 5901 on its surface facilitate the passage of the gas after dust reduction. The PTFE coated filter bag 60 is used to filter the dust in the gas. When the gas containing dust passes through the PTFE coated filter bag 60, the dust is adsorbed on the surface of the PTFE coated filter bag 60, and the gas can pass through the PTFE coated filter bag 60 into its interior, thereby achieving the dust removal effect.

[0052] When the gas supply pipe 1801 introduces the dust-containing gas transported by the outlet pipe 1502 into the dust removal barrel 18, the gas will pass through the PTFE-coated filter bag 60 and the strip ventilation groove 59 into the interior of the support tube 58, and the dust in the gas will be adsorbed on the surface of the PTFE-coated filter bag 60. The gas entering the support tube 58 is sent out from the outlet hole 5901 at the upper end of the support tube 58, and the gas after being sent out enters the spray tank 19 through the delivery pipe 20.

[0053] One end of the air supply pipe 62 away from the dust removal barrel 18 is connected to an external compressed air source to provide cleaning gas for the jet pipe 64. The second solenoid valve 63 controls its on and off. The porous plate 61 is used to fix the jet pipe 64 so that the jet pipe 64 can be accurately aligned with the air outlet 5901 of the support tube 58. At the same time, the internal channel can play a gas conveying role, introducing the gas in the air supply pipe 62 into each jet pipe 64. When the dust reduction work is continued, dust will accumulate on the surface of the PTFE coated filter bag 60, thereby affecting the filtering effect of the PTFE coated filter bag 60. At this time, the second solenoid valve 63 can be used to control the jet pipe 64 to eject the compressed gas, and the gas passes through the air outlet 5901 and the strip The ventilation groove 59 is in contact with the PTFE coated filter bag 60. At this time, due to the effects of compressed gas and dust accumulation, the pressure inside the PTFE coated filter bag 60 is relatively high, which will cause the PTFE coated filter bag 60 to expand briefly. At this time, the compressed gas in the PTFE coated filter bag 60 diffuses outward from the pores of the PTFE coated filter bag 60, thereby blowing off the dust on the outer surface of the PTFE coated filter bag 60, and the cleaned dust falls into the first collection box 401 in the carrying box 4. The second solenoid valve 63 can be pre-set through an external control system, and the control gas is opened regularly to achieve regular cleaning of the PTFE coated filter bag 60, thereby ensuring the stability of the device during long-term operation.

[0054] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 13 As shown, a second liquid pump 65 is fixedly installed at the upper end of the waste liquid collection tank 5, the input end of the second liquid pump 65 is fixedly connected to a liquid extraction pipe 68, the output end of the second liquid pump 65 is fixedly connected to a liquid supply pipe 66, and the other end of the liquid supply pipe 66 passes through the outer surface of the spray tank 19 and is fixedly connected to a spiral nozzle 67.

[0055] Furthermore, a second fixing frame 69 is fixedly connected to the interior of the spray tank 19 at the lower side of the spiral nozzle 67, and a plurality of mounting grooves are provided through the upper end of the second fixing frame 69. A ball ring 70 is fixedly connected to the interior of the mounting groove. A wire mesh demister 71 is fixedly connected to the interior of the spray tank 19 at the upper side of the spiral nozzle 67, and an exhaust port 72 is provided through the upper end of the spray tank 19.

[0056] Specifically, the delivery pipe 20 delivers the gas after dust reduction from the dust removal barrel 18 to the spray tank 19. The spray tank 19 is used to perform alkali absorption treatment on the gas. The liquid extraction pipe 68 is connected to the external alkali solution supply mechanism. The alkali solution is extracted by the second liquid extraction pump 65 and delivered to the spiral nozzle 67 through the liquid supply pipe 66 for spraying and contacting with the exhaust gas to react, thereby removing mercury vapor in the exhaust gas. The waste alkali solution after the reaction falls into the waste liquid collection pool 5 for collection, and the treated clean gas is discharged through the exhaust port 72.

[0057] The outlet of the spiral nozzle 67 is spiral-shaped, which can atomize the liquid into fine droplets, increase the contact area between the liquid and the gas, and the spray angle formed by the spiral nozzle 67 is large, the coverage range is wide, and it can fully contact the rising gas. The ball ring 70 is made of plastic material, and windows are opened on the ring wall. The inner and outer surfaces are evenly distributed, which increases the contact area between the gas and the liquid. The ball ring 70 is stacked in a disorderly manner in the second fixed frame 69 to form a complex airflow channel, which prolongs the contact time between the gas and the liquid, so that the harmful substances in the gas can be more fully absorbed by the liquid, and the purification efficiency of the spray tank 19 is improved. The wire mesh demister 71 is used to remove droplets in the gas to make the discharged gas cleaner. The wire mesh demister 71 is composed of multiple layers of metal wire mesh superimposed on each other, and the mesh intersections are welded and fixed. It has a high porosity, high efficiency in capturing droplets, and low resistance.

[0058] It should be noted that in order to ensure that exhaust gas emissions comply with regulations, the exhaust port 72 can be connected to the gas detection structure, and the output port of the gas detection structure is connected to the exhaust pipe and the circulation pipe. The exhaust pipe and the circulation pipe are switched by a reversing valve. The end of the exhaust pipe away from the gas detection structure is connected to the spray tank 19. The content of harmful substances in the exhaust gas is detected by the gas detection structure. If the emission standard is met, the gas is discharged from the exhaust pipe. If the emission standard is not met, the gas returns to the spray tank 19 through the circulation pipe for further treatment until the emission standard is met.

[0059] Reference Figure 1-Figure 3 As shown, the front end of the waste liquid collection tank 5 is connected to a liquid outlet pipe 21, the other end of the liquid outlet pipe 21 is fixedly connected to a first liquid pump 22, the output end of the first liquid pump 22 is fixedly connected to an infusion pipe 23, the other end of the infusion pipe 23 is connected to the front end of the waste liquid neutralization tank 6, and a first solenoid valve 24 is provided on the infusion pipe 23.

[0060] Specifically, the first liquid pump 22 is used to provide power to transport the waste liquid in the waste liquid collection tank 5 to the waste liquid neutralization tank 6. The waste liquid neutralization tank 6 is equipped with an agitator to fully mix the waste liquid and the neutralizer. The tank wall is provided with a pH sensor and a liquid level sensor for real-time monitoring of the solution pH and liquid level. The waste liquid neutralization tank 6 is connected to a neutralizer automatic dosing mechanism to automatically control the amount of neutralizer added. A drain pipe is provided at the rear of the waste liquid collection tank 5, and a drain valve is provided at the bottom of the tank to facilitate the cleaning of sediment. The first solenoid valve 24 is linked to the liquid level sensor to realize automatic opening and closing. The first solenoid valve 24 and the first liquid pump 22 are opened and closed synchronously. After starting, the waste liquid is transported to the waste liquid neutralization tank 6 through the infusion pipe 23, and the liquid level sensor monitors the liquid level of the waste liquid neutralization tank 6 in real time. When the liquid level reaches the target value, the first solenoid valve 24 and the first liquid pump 22 are synchronously closed. At this time, the automatic neutralizer delivery mechanism delivers a certain amount of neutralizer to the waste liquid neutralization tank 6, and then stirs it through the agitator to ensure that the waste liquid and the neutralizer are fully mixed. After the pH value of the waste liquid reaches the target value, the treated wastewater is delivered to the mercury-containing wastewater treatment process through the discharge pipe. After the treated wastewater is delivered, the first solenoid valve 24 and the first liquid pump 22 are synchronously started again for the next wastewater neutralization.

[0061] Working principle: When the device is used for mercury chloride catalyst extraction and waste gas treatment, the first servo motor 2801 is used to drive the first screw 28 to rotate, driving the first slide 29 to slide in the first slide rail 27, realizing the forward and backward movement of the second slide rail 30, and the second servo motor 34 is used to drive the second screw 31 to rotate, driving the second slide 32 to slide in the second slide rail 30, realizing the left and right movement of the support base 35, and the cylinder 36 drives the lifting base 25 to move up and down, realizing the up and down movement of the first fixed plate 1 and the suction pipe 7. During the movement, the machine vision camera 41 captures the position image of the converter reaction tube 2, and the inertial measurement unit 39 detects the posture of the lifting base 25, thereby realizing the alignment of the suction pipe 7 with the converter. The converter reaction tube 2 is precisely docked. During the docking process, the annular pressure sensor 10 monitors the pressure between the suction pipe 7 and the converter reaction tube 2 to ensure that the sealing gasket 11 is tightly abutted to ensure sealing. After the docking is completed, the centrifugal pump 13 is started to extract the catalyst in the converter reaction tube 2 through the negative pressure pipe 14 and the suction pipe 7. The catalyst enters the cyclone separator 15 through the feed pipe 16 and the feed pipe 1501. In the cyclone separator 15, the catalyst and the gas are separated. The catalyst enters the screening box 17 through the discharge pipe 1503. The gas enters the dust removal bucket 18 through the outlet pipe 1502 and the gas feed pipe 1801. After the catalyst enters the screening box 17, it is guided by the guide plate 42 and falls on the screen plate 49. The third servo motor 56 drives the rotating shaft 54 ​​to rotate. The eccentric wheel 55 rotates, causing the sieve plate 49 and the receiving plate 50 to vibrate under the action of the spring 46, screening the catalyst. The catalyst that meets the required particle size is screened out and falls on the receiving plate 50, and the catalyst that does not meet the requirements remains on the sieve plate 49. The receiving plate 50 receives the catalyst screened out by the sieve plate 49 and transports it to the second discharge port 45 for discharge under the action of vibration. The dust cover 51 covers the first discharge port 44 and the second discharge port 45 to prevent the catalyst from generating dust overflow during the discharge process and reduce the pollution to the processing environment. The collecting box 52 is used to receive the catalyst discharged from the first discharge port 44 and the second discharge port 45, and the catalyst is collected and stored through the second collecting box 53 for subsequent processing and reuse. The second collecting box 53 is inserted into the collecting box 52 and can be easily extracted from the collecting box 52, which is convenient for the transfer and treatment of the catalyst. The gas entering the dust removal barrel 18 is filtered by the PTFE coated filter bag 60, and the dust is adsorbed on the surface of the filter bag. The filtered gas enters the spray tank 19 through the delivery pipe 20. The gas entering the spray tank 19 is in full contact with the liquid sprayed by the spiral nozzle 67. The ball ring 70 increases the contact area, so that the harmful substances in the gas are absorbed, and then the droplets are removed by the wire mesh demister 71. Finally, it is discharged from the exhaust port 72. The waste liquid generated by the spraying falls into the waste liquid collection pool 5, and the waste liquid is sent to the waste liquid neutralization pool 6 for neutralization treatment through the liquid outlet pipe 21 and the liquid infusion pipe 23 by the first liquid pump 22.

[0062] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A mercury chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production, characterized in that: The invention comprises a first fixed plate (1), a converter reaction tube (2), a first fixed frame (3), a carrying box (4), a waste liquid collection tank (5), a waste liquid neutralization tank (6) and a mounting plate (12), wherein the inner side of the first fixed plate (1) is fixedly connected with a suction pipe (7), the lower end of the suction pipe (7) is plugged into the interior of the converter reaction tube (2), the upper end of the suction pipe (7) is fixedly connected with a threaded joint (8), the upper end of the mounting plate (12) is fixedly installed with a centrifugal pump (13), the input end of the centrifugal pump (13) is fixedly connected with a negative pressure pipe (14), the other end of the negative pressure pipe (14) passes through the upper end of the mounting plate (12) and is threadedly connected to the upper end of the threaded joint (8), the inner side of the first fixed frame (3) is fixedly connected with a cyclone separator (15), the outer surface of the cyclone separator (15) is connected with a feed pipe (1501), and the upper end of the cyclone separator (15) is connected with an outlet pipe (1502), the lower end of the cyclone separator (15) is connected to a discharge pipe (1503), the other end of the feed pipe (1501) is connected to a delivery pipe (16), the other end of the delivery pipe (16) is fixedly connected to the output end of the centrifugal pump (13), the other end of the discharge pipe (1503) is connected to a screening box (17), the screening box (17) is fixedly connected to the inner side of the first fixed frame (3), and the upper end of the carrying box (4) is fixedly connected to The dust removal bucket (18) is connected to the air delivery pipe (1801) at the other end of the air outlet pipe (1502), and the other end of the air delivery pipe (1801) is connected to the interior of the dust removal bucket (18). The upper end of the waste liquid collection tank (5) is fixedly connected to the spray tank (19). The outer surface of the dust removal bucket (18) is connected to the delivery pipe (20) on the side away from the air delivery pipe (1801), and the other end of the delivery pipe (20) is connected to the interior of the spray tank (19).

2. The mercuric chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production according to claim 1, characterized in that: The outer surface of the suction pipe (7) is located on the lower side of the first fixed plate (1) and is fixedly connected to a support plate (9); an annular pressure sensor (10) is fixedly installed at the lower end of the support plate (9); a sealing gasket (11) is fixedly connected to the lower end of the annular pressure sensor (10); and the lower end of the sealing gasket (11) abuts against the upper end of the converter reaction tube (2).

3. The mercuric chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production according to claim 1, characterized in that: The left and right sides of the mounting plate (12) are both provided with first slide rails (27), the interior of the first slide rail (27) is rotatably connected to a first screw rod (28), the front end of the first slide rail (27) is fixedly installed with a first servo motor (2801) for driving the first screw rod (28) to rotate, the outer surface of the first screw rod (28) is threadedly connected to a first slide seat (29), the first slide seat (29) is slidably connected to the interior of the first slide rail (27), the upper ends of the two first slide seats (29) are fixedly connected to a second slide rail (30), the interior of the second slide rail (30) is rotatably connected to a second screw rod (31), and the right end of the second slide rail (30) is fixedly installed with a second servo motor (2801) for driving the second screw rod (31) to rotate. A servo motor (34) is provided. The outer surface of the second screw rod (31) is threadedly connected to a second slide seat (32). The second slide seat (32) is slidably connected to the inside of the second slide rail (30). The upper end of the second slide seat (32) is fixedly connected to a connecting plate (33). The front end of the connecting plate (33) is fixedly connected to a support seat (35). The upper end of the support seat (35) is fixedly mounted with a cylinder (36). The output end of the cylinder (36) passes through the upper end of the support seat (35) and is fixedly connected to a lifting seat (25). The mounting plate (12) is fixedly connected to the right end of the lifting seat (25). The lower end of the lifting seat (25) is fixedly connected to a fixed seat (26). The first fixed plate (1) is fixedly connected to the lower end of the fixed seat (26).

4. The mercuric chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production according to claim 3, characterized in that: The lower end of the support seat (35) is fixedly connected to two symmetrically distributed guide rods (37), the lower ends of the guide rods (37) are fixedly connected to the limit blocks (38), the lifting seat (25) is slidably connected to the outer surface of the guide rods (37), an inertial measurement unit (39) is embedded at the center of the lower end of the lifting seat (25), the left end of the first fixed plate (1) is fixedly connected to the camera mounting seat (40), the inner side of the camera mounting seat (40) is fixedly installed with a machine vision camera (41), and the machine vision camera (41) is tilted toward the direction of the suction pipe (7).

5. The mercuric chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production according to claim 1, characterized in that: The right inner wall of the screening box (17) is provided with a telescopic slot (43), the left inner wall of the screening box (17) is located below the telescopic slot (43) and is provided with a first discharge port (44), the right inner wall of the screening box (17) is located below the first discharge port (44) and is provided with a second discharge port (45), the inner bottom ends of the telescopic slot (43), the first discharge port (44) and the second discharge port (45) are all fixedly connected with a plurality of evenly distributed springs (46), the upper ends of the upper springs (46) are fixedly connected with a T-shaped stopper (47), and the upper ends of the two lower springs (46) are fixedly connected with a T-shaped stopper (47). The ends of the screening box (17) are fixedly connected with U-shaped blocks (48), a sieve plate (49) is fixedly connected between the T-shaped block (47) and the U-shaped block (48) on the left, a material receiving plate (50) is fixedly connected between the U-shaped block (48) on the left and the U-shaped block (48) on the right, and a dust cover (51) and a collection box (52) are fixedly connected at the left and right ends of the screening box (17) and the corresponding positions of the first discharge port (44) and the second discharge port (45), the lower end of the dust cover (51) is fixedly connected to the upper end of the collection box (52), and the rear end of the collection box (52) is plugged with a second collection box (53).

6. The mercuric chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production according to claim 1, characterized in that: The inner top end of the screening box (17) is fixedly connected to a material guide plate (42), the material guide plate (42) is tilted in the direction of the telescopic slot (43), the interior of the telescopic slot (43) is rotatably connected to a rotating shaft (54), the outer surface of the rotating shaft (54) is fixedly connected to an eccentric wheel (55), and the rear end of the screening box (17) is fixedly installed with a third servo motor (56) for driving the rotating shaft (54) to rotate.

7. The mercuric chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production according to claim 1, characterized in that: The interior of the dust collecting barrel (18) is fixedly connected to a second fixed plate (57), the upper end of the second fixed plate (57) is penetrated by a plurality of evenly distributed through grooves, the interior of the through groove is fixedly connected to a support tube (58), the outer surface of the support tube (58) is located on the lower side of the second fixed plate (57), and is penetrated by a plurality of evenly distributed strip-shaped ventilation grooves (59), the upper end of the support tube (58) is penetrated by an air outlet (5901), the outer side of the support tube (58) is fastened with a PTFE-coated filter bag (60) by a tie, and the dust collecting barrel (18) is fixedly connected to a second fixed plate (57), the upper end of ... ) is fixedly connected to the inner top of the porous plate (61), the lower end of the porous plate (61) is connected to the same number of air injection pipes (64) as the support tube (58), the lower end of the air injection pipe (64) extends to the inside of the air outlet (5901), the upper end of the porous plate (61) is connected to the air supply pipe (62), the other end of the air supply pipe (62) passes through the upper end of the dust removal barrel (18) and extends to the upper side of the dust removal barrel (18), a second solenoid valve (63) is provided on the air supply pipe (62), and the rear end of the carrying box (4) is plugged with the first collection box (401).

8. The mercuric chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production according to claim 1, characterized in that: A second liquid extraction pump (65) is fixedly installed at the upper end of the waste liquid collection tank (5); an input end of the second liquid extraction pump (65) is fixedly connected to a liquid extraction pipe (68); an output end of the second liquid extraction pump (65) is fixedly connected to a liquid supply pipe (66); the other end of the liquid supply pipe (66) passes through the outer surface of the spray tank (19) and is fixedly connected to a spiral spray head (67).

9. The mercuric chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production according to claim 1, characterized in that: The interior of the spray tank (19) is located at the lower side of the spiral spray head (67) and is fixedly connected to a second fixing frame (69); the upper end of the second fixing frame (69) is provided with a plurality of mounting grooves, and the interior of the mounting grooves is fixedly connected to a ball ring (70); the interior of the spray tank (19) is located at the upper side of the spiral spray head (67) and is fixedly connected to a wire mesh demister (71); and the upper end of the spray tank (19) is provided with an exhaust port (72).

10. The mercuric chloride catalyst extraction and waste gas treatment device for polyvinyl chloride production according to claim 1, characterized in that: The front end of the waste liquid collection tank (5) is connected to a liquid outlet pipe (21), the other end of the liquid outlet pipe (21) is fixedly connected to a first liquid pump (22), the output end of the first liquid pump (22) is fixedly connected to a liquid infusion pipe (23), the other end of the liquid infusion pipe (23) is connected to the front end of the waste liquid neutralization tank (6), and a first electromagnetic valve (24) is provided on the liquid infusion pipe (23).

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