A device for purifying and recovering VOCs in waste gas

Abstract

The present invention discloses a device for purifying and recovering VOCs in waste gas, comprising a VOCs waste gas treatment device, wherein the VOCs waste gas treatment device comprises an equipment carrier plate, a power distribution control cabinet located at the right end of the equipment carrier plate is fixedly connected to the top surface of the equipment carrier plate, and a waste gas booster located on the left side of the power distribution control cabinet is fixedly installed on the top surface of the equipment carrier plate; the waste gas can be pressurized by the VOCs waste gas treatment device and the high-pressure waste gas can be passed into a high-pressure adsorption device, and the air pressure inside the high-pressure adsorption device is maintained within the adsorption pressure range by a pressure-maintaining exhaust component, and organic matter in the waste gas can be adsorbed and fixed by the high-pressure adsorption device to achieve the purpose of purification, and the manufacturing cost of the device for purifying and recovering VOCs in waste gas is reduced by setting a high-pressure adsorption device, and the volume of the equipment is reduced, the floor space occupied is smaller, and the practicability of the device for purifying and recovering VOCs in waste gas is improved.

Description

Technical Field

[0001] The present invention relates to the field of waste gas treatment equipment, and more specifically, to a device for purifying and recovering VOCs in waste gas. Background Art

[0002] Volatile organic compounds (VOCs) are a class of organic compounds with high saturated vapor pressure (>133.32Pa) and low boiling point (50-250℃) at room temperature. Most VOCs have serious impacts on human health due to their toxicity, mutagenicity and carcinogenicity. In addition, VOCs can also cause serious ecological and environmental problems such as greenhouse effect, photochemical smog, and ozone layer depletion. If the waste gas containing VOCs is directly discharged, it will not only cause waste of resources, but also cause environmental pollution. Therefore, it is necessary to purify and recover the VOCs in the waste gas. At present, the purification and recovery methods of VOCs mainly include carbon adsorption method, pressure swing adsorption method, condensation method, and membrane separation technology. Among them, pressure swing adsorption is to use an adsorbent to first adsorb organic matter in organic waste gas under a certain pressure. When the adsorbent is saturated with adsorption, the adsorbent is regenerated. The regeneration does not use steam, but desorbs the organic matter through pressure change. When the pressure is reduced, the organic matter is desorbed and separated from the surface of the adsorbent, which has the advantage of high recovery efficiency.

[0003] The existing pressure swing adsorption equipment is mainly composed of two adsorption towers, a power distribution control cabinet, a booster pump, a vacuum pump, a solenoid valve, a pressure sensor, an exhaust gas detector, etc. When in use, the booster pump first pressurizes the exhaust gas and injects it into the first absorption tower to achieve high-pressure adsorption. After saturation of adsorption, the power distribution control cabinet controls the booster pump to inject high-pressure exhaust gas into the second absorption tower, and then the power distribution control cabinet controls the first absorption tower to vent, and then the power distribution control cabinet controls the vacuum pump to vacuum the first absorption tower to reduce the air pressure and achieve desorption. However, the two adsorption towers are set up, resulting in high equipment cost, large equipment size, large floor space, and more solenoid valves. The solenoid valves work for a long time, frequently start, and current and voltage shocks will cause damage to themselves. Any damage to the solenoid valve will cause the adsorption process to terminate, and the failure rate is high. At the same time, the vacuum in the adsorption tower needs to be broken and pressurized for adsorption, and the high-pressure environment in the adsorption tower needs to be broken and vacuumed to reduce the pressure during desorption, which consumes a lot of energy and has a high cost of use. Therefore, it is urgent to design a purification and recovery device for VOCs in exhaust gas. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] The existing pressure swing adsorption equipment in the prior art is mainly composed of two adsorption towers, a power distribution control cabinet, a booster pump, a vacuum pump, a solenoid valve, a pressure sensor, an exhaust gas detector, etc. When in use, the booster pump first pressurizes the exhaust gas and injects it into the first absorption tower to achieve high-pressure adsorption. After saturation of adsorption, the power distribution control cabinet controls the booster pump to inject high-pressure exhaust gas into the second absorption tower, and then the power distribution control cabinet controls the first absorption tower to evacuate, and then the power distribution control cabinet controls the vacuum pump to evacuate the first absorption tower to reduce the air pressure and achieve desorption. However, it sets two adsorption towers, resulting in The manufacturing cost is high, the equipment is large in size, occupies a large area, and uses a large number of solenoid valves. The solenoid valves will cause damage due to long-term operation, frequent startup, current and voltage shocks. Any damage to the solenoid valve will lead to the termination of the adsorption process, and the failure rate is high. At the same time, adsorption requires breaking the vacuum in the adsorption tower and pressurizing it. Desorption requires breaking the high-pressure environment in the adsorption tower and evacuating and reducing the pressure. The energy consumption is large and the cost of use is high. The purpose of the present invention is to provide a purification and recovery device for VOCs in exhaust gas, which can well solve the problems raised in the background technology.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A device for purifying and recovering VOCs in exhaust gas, comprising a VOCs exhaust gas treatment device, wherein the VOCs exhaust gas treatment device comprises an equipment carrier plate, a power distribution control cabinet located at the right end of the equipment carrier plate is fixedly connected to the top surface of the equipment carrier plate, an exhaust gas supercharger located on the left side of the power distribution control cabinet is fixedly installed on the top surface of the equipment carrier plate, an exhaust gas inlet pipe is fixedly connected to the front of the exhaust gas supercharger, an exhaust gas delivery pipe is fixedly connected to the top surface of the exhaust gas supercharger, and a high-pressure adsorption device is installed at the other end of the exhaust gas delivery pipe, the high-pressure adsorption device comprises a lower reducer, the lower reducer is fixedly connected to the end of the exhaust gas delivery pipe, the top of the lower reducer is fixedly connected to a high-pressure adsorption cylinder, the top bolt of the high-pressure adsorption cylinder is installed with a sealing cover, a pressure-maintaining exhaust component is provided on the sealing cover, the pressure-maintaining exhaust component comprises a pressure-maintaining exhaust column, the pressure-maintaining exhaust column is fixedly connected to the top surface of the sealing cover, a negative pressure desorption component is provided on the outside of the high-pressure adsorption cylinder, and the negative pressure desorption component comprises a negative pressure tank body, and the negative pressure tank body is fixedly sleeved on the high-pressure adsorption On the outside of the cylinder, the high-pressure adsorption cylinder is fixedly inserted on the top surface of the negative pressure tank body, the sealing cover is located above the negative pressure tank body, the lower tapered tube is located inside the negative pressure tank body, the exhaust gas delivery pipe is fixedly inserted on the front of the negative pressure tank body, the negative pressure tank body is fixedly connected to the top surface of the equipment bearing plate and is located on the left side of the power distribution control cabinet and behind the exhaust gas supercharger, and a reciprocating lifting mechanism is provided on the bottom surface of the inner cavity of the negative pressure tank body, the reciprocating lifting mechanism includes a reciprocating lifting motor, the reciprocating lifting motor is fixedly mounted on the bottom surface of the inner cavity of the negative pressure tank body, the external fixed sleeve of the output shaft on the reciprocating lifting motor is connected with a rotating driving gear located at its top, a desorption unit assembly is provided inside the high-pressure adsorption cylinder, the desorption unit assembly includes a guide cone tube, the guide cone tube is fixedly connected to the inner wall of the high-pressure adsorption cylinder, a smoothing mechanism is provided on the top surface of the inner cavity of the sealing cover, and the smoothing mechanism includes a plug-in sealing column, the plug-in sealing column is fixedly connected to the top surface of the inner cavity of the sealing cover, and the bottom end of the plug-in sealing column is movably plugged into the inside of the high-pressure adsorption cylinder.

[0009] Preferably, the high-pressure adsorption equipment also includes a bearing orifice plate, which is fixedly connected to the inner wall of the lower tapered tube, and alumina particles are stored on the top surface of the bearing orifice plate. The bottom end of the guide cone tube is movably inserted into the interior of the alumina particles. The high-pressure adsorption equipment also includes VOCs adsorption particles, which are loaded into the interior of the high-pressure adsorption cylinder and located above the guide cone tube, and the VOCs adsorption particles fill the guide cone tube.

[0010] Preferably, the pressure-maintaining exhaust component also includes a pressure-maintaining exhaust cavity, which is arranged inside the pressure-maintaining exhaust column, and a conical air hole is arranged on the bottom surface of the inner cavity of the pressure-maintaining exhaust cavity, and a conical air plug is movably inserted inside the conical air hole, and a guide slide bar is fixedly connected to the top surface of the conical air plug, and the top end of the guide slide bar extends from the top surface of the pressure-maintaining exhaust column, and the outside of the guide slide bar is movably sleeved with a pressure-maintaining exhaust spring and a pressure-maintaining adjusting ring located inside the pressure-maintaining exhaust cavity, and the top surface of the conical air plug is transmission-connected with the pressure-maintaining exhaust spring and the pressure-maintaining adjusting ring through the pressure-maintaining exhaust spring, and a pressure-maintaining external threaded tube is movably sleeved on the top surface of the pressure-maintaining adjusting ring, and the top end of the pressure-maintaining external threaded tube extends from the top surface of the pressure-maintaining exhaust column. The pressure-maintaining external threaded tube extends out, and cooperates with the pressure-maintaining exhaust column thread. The pressure-maintaining external threaded tube is slidably sleeved on the outside of the guide slide rod. The pressure-maintaining exhaust component also includes an externally threaded mounting convex tube, which is movably sleeved on the outside of the pressure-maintaining external threaded tube and fixedly connected to the top surface of the pressure-maintaining exhaust column. The external thread of the externally threaded mounting convex tube is sleeved with a protective cap barrel, and the bottom end of the protective cap barrel is in contact with the top surface of the pressure-maintaining exhaust column. The top ends of the guide slide rod and the pressure-maintaining external threaded tube are movably inserted into the inside of the protective cap barrel. The pressure-maintaining exhaust component also includes an exhaust branch pipe, which is fixedly connected to the right side surface of the pressure-maintaining exhaust column, and the exhaust branch pipe is connected to the pressure-maintaining exhaust cavity.

[0011] Preferably, the negative pressure desorption device also includes a negative pressure partition, which is fixedly connected to the inner wall of the negative pressure tank body, a negative pressure desorption chamber is formed above the negative pressure partition, and an equipment installation chamber is formed below the negative pressure partition. The high-pressure adsorption cylinder and the lower tapered tube are located inside the negative pressure desorption chamber, the reciprocating lifting motor and the rotating drive gear are located inside the equipment installation chamber, and an exhaust negative pressure pipe is fixedly inserted on the left side surface of the inner cavity of the negative pressure desorption chamber, and the exhaust negative pressure pipe is fixedly inserted on the left side surface of the negative pressure tank body. The left end of the exhaust negative pressure pipe extends to the outside of the negative pressure tank body and is fixedly connected to a vacuum pump, and the vacuum pump is fixedly installed on the top surface of the equipment supporting plate.

[0012] Preferably, the reciprocating lifting mechanism also includes a base bearing, there are two base bearings, the base bearings are fixedly connected to the bottom surface of the inner cavity of the negative pressure tank body, the two base bearings are respectively located at the left and right ends of the bottom surface of the inner cavity of the negative pressure tank body, the base bearing is internally movably connected with a linkage vertical pipe, the inner wall of the linkage vertical pipe is fixedly connected with a reciprocating lifting block located at the top thereof, the internal movably connected with a reciprocating threaded rod of the reciprocating lifting block, the reciprocating threaded rod is threadedly matched with the reciprocating lifting block, the top of the reciprocating threaded rod is fixedly connected with a reciprocating lifting vertical rod, the external sliding sleeve of the reciprocating lifting vertical rod is connected with a sliding rod seal, the sliding rod seal is fixedly connected to the negative pressure partition, the external fixed sleeve of the linkage vertical pipe is connected with a driven gear, and the driven gear is meshed with the rotating drive gear.

[0013] Preferably, the desorption unit assembly further comprises a gas rising hole and an inclined drop pipe, the gas rising hole is arranged on the guide cone tube, the inclined drop pipe is fixedly connected to the bottom end of the guide cone tube, the other end of the inclined drop pipe extends from the right side surface of the lower tapered tube, the desorption unit assembly further comprises a desorption unit cylinder, the desorption unit cylinder is located in the interlayer between the high-pressure adsorption cylinder and the negative pressure tank body, the top end of the desorption unit cylinder is open, the number of the desorption unit cylinders is thirteen, the thirteen desorption unit cylinders are evenly surrounded by the outside of the high-pressure adsorption cylinder, and the thirteen desorption unit cylinders are arranged in a spiral upward trajectory The desorption unit cylinder is fixedly connected with a mounting plate, and the other end of the mounting plate is fixedly connected to the inner wall of the negative pressure tank body. An upper air-tight long plug and a lower air-tight long plug are slidably inserted in the interior of the desorption unit cylinder, and a fixed-distance short rod is fixedly connected between the upper air-tight long plug and the lower air-tight long plug. A vertical power support rod is fixedly connected to the bottom surface of the lower air-tight long plug. The bottom end of the vertical power support rod extends to the outside of the desorption unit cylinder and is fixedly connected with a vertical power ring. The vertical power ring is slidably inserted in the interior of the negative pressure tank body, and the bottom surface of the vertical power ring is fixedly connected to the top of the reciprocating lifting vertical rod. The vertical power ring is slidably sleeved on the outside of the exhaust gas conveying pipe, and the other end of the inclined drop pipe is fixedly connected to the middle position of the desorption unit tube at the bottom of the high-pressure adsorption cylinder. The bottom desorption unit tube is numbered as the first, and the remaining desorption unit tubes are numbered spirally upward according to their distribution trajectory. The bottom desorption unit tube is connected to a venting inclined pipe located on its right side, and the venting inclined pipe is connected to a venting bent pipe. The other end of the venting bent pipe extends to the outside of the negative pressure tank body and is fixedly connected to the exhaust gas input pipe. The other end of the venting inclined pipe is tilted downward and connected to the second desorption unit tube The middle position of the other two adjacent desorption unit cylinders are connected with a negative pressure desorption hole tube, the clockwise end of the negative pressure desorption hole tube is connected with the top position of the corresponding desorption unit cylinder, the counterclockwise end of the negative pressure desorption hole tube is connected with the middle position of the corresponding desorption unit cylinder, the desorption unit cylinder at the end of the number is connected with a particle reset inclined tube, the other end of the particle reset inclined tube is inclined downward and connected to the surface of the high-pressure adsorption cylinder, the interlayer space between the upper air-sealing long plug and the lower air-sealing long plug is adapted to the inclined dropping pipe, the venting inclined tube, the negative pressure desorption hole tube and the particle reset inclined tube.

[0014] Preferably, the smoothing mechanism also includes a smoothing conical groove, which is arranged on the bottom surface of the plug-in sealing cylinder, and an air delivery groove is arranged on the top surface of the inner cavity of the smoothing conical groove, and the air delivery groove is connected to the conical air hole, and a fixed wing strip is fixedly connected to the inner wall of the smoothing conical groove, and the other end of the fixed wing strip is fixedly connected to a fixed long tube, and a rotating central axis is movably inserted into the interior of the fixed long tube, and the top end of the rotating central axis extends to the interior of the air delivery groove and is fixedly sleeved with pneumatic blades, and the bottom end of the rotating central axis is fixedly connected to a smoothing rotating bar, which is movably inserted into the interior of the high-pressure adsorption cylinder and is adapted to the VOCs adsorption particles.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] 1. The VOCs waste gas treatment device can pressurize the waste gas and pass the high-pressure waste gas into the high-pressure adsorption equipment. The pressure inside the high-pressure adsorption equipment is maintained within the adsorption pressure range through the pressure-maintaining exhaust component. The high-pressure adsorption equipment can adsorb and fix the organic matter in the waste gas to achieve the purpose of purification. The setting of a high-pressure adsorption device reduces the manufacturing cost of the purification and recovery device for VOCs in the waste gas, reduces the size of the equipment, occupies a smaller area, and improves the practicability of the purification and recovery device for VOCs in the waste gas.

[0018] 2. Through the negative pressure desorption component, a low-pressure desorption environment is set up in the purification and recovery device for VOCs in exhaust gas. The reciprocating lifting mechanism can drive the desorption unit assembly to reciprocate up and down. The reciprocating desorption unit assembly can transfer the VOCs adsorption particles saturated with adsorption inside the high-pressure adsorption device and make them undergo the processes of venting, negative pressure desorption, and reflux to the inside of the high-pressure adsorption device in sequence, so that the purification and recovery device for VOCs in exhaust gas can achieve continuous purification of exhaust gas, without the need to use solenoid valves, and the failure rate is low. The environment inside the high-pressure adsorption device and the negative pressure desorption component does not need to be converted between high and low pressures during the exhaust gas purification process, which reduces energy consumption and has low use costs. The smoothing mechanism can move the VOCs adsorption particles circulating into the high-pressure adsorption device, so that the VOCs adsorption particles are spread out inside the high-pressure adsorption device, which helps to increase the quality of exhaust gas treatment and improves the practicality of the purification and recovery device for VOCs in exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 For the present invention Figure 1 Schematic diagram of the internal structure of the medium negative pressure tank;

[0021] Figure 3 For the present invention Figure 2 Schematic diagram of the internal structure of medium and high pressure adsorption equipment;

[0022] Figure 4 For the present invention Figure 3 Schematic diagram of the internal structure of the medium pressure exhaust component;

[0023] Figure 5 For the present invention Figure 2 Schematic diagram of the internal structure of the middle linkage riser;

[0024] Figure 6For the present invention Figure 2 Schematic diagram of the internal structure of the middle desorption unit cylinder;

[0025] Figure 7 For the present invention Figure 2 Schematic diagram of the internal structure of the medium negative pressure tank from a top view.

[0026] Description of the numbers in the figure:

[0027] 1. VOCs waste gas treatment device; 11. Equipment bearing plate; 12. Power distribution control cabinet; 13. Waste gas supercharger; 14. Waste gas inlet pipe; 15. Waste gas delivery pipe; 2. High-pressure adsorption equipment; 21. High-pressure adsorption cylinder; 22. Lower tapered pipe; 23. Bearing orifice plate; 24. Alumina particles; 25. VOCs adsorption particles; 26. Sealing cover; 3. Pressure-maintaining exhaust parts; 301. Pressure-maintaining exhaust column; 302. Pressure-maintaining exhaust cavity; 303. Conical air hole; 304, conical air plug; 305, guide slide bar; 306, pressure-maintaining exhaust spring; 307, pressure-maintaining adjustment ring; 308, pressure-maintaining external threaded pipe; 309, external threaded mounting convex pipe; 310, protective cap tube; 311, exhaust branch pipe; 4, negative pressure desorption component; 41, negative pressure tank body; 42, negative pressure partition; 43, negative pressure desorption chamber; 44, equipment installation chamber; 45, vacuum negative pressure pipe; 46, vacuum pump; 5, reciprocating lifting mechanism; 5 1. Reciprocating lifting motor; 52. Rotating driving gear; 53. Base bearing; 54. Linkage vertical pipe; 55. Reciprocating lifting block; 56. Reciprocating threaded rod; 57. Reciprocating lifting vertical rod; 58. Sliding rod seal; 59. Driven gear; 6. Desorption unit assembly; 601. Guide cone; 602. Gas rising hole; 603. Inclined drop pipe; 604. Desorption unit cylinder; 605. Mounting plate; 606. Upper air-blocking long plug; 607. Fixed Short distance rod; 608, lower air-blocking long plug; 609, vertical power support rod; 610, vertical power circle; 611, venting inclined tube; 612, venting bent tube; 613, negative pressure desorption hole tube; 614, particle reset inclined tube; 7, leveling mechanism; 71, plug-in sealing column; 72, leveling conical groove; 73, gas transmission groove; 74, fixed wing strip; 75, fixed long tube; 76, rotating central axis; 77, pneumatic blades; 78, leveling rotating strip. DETAILED DESCRIPTION

[0028] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0029] A device for purifying and recovering VOCs in waste gas, including a VOCs waste gas treatment device 1, see Figure 1 The VOCs waste gas treatment device 1 includes an equipment carrier plate 11, a power distribution control cabinet 12 located at the right end of the equipment carrier plate 11 is fixedly connected to the top surface of the equipment carrier plate 11, and an exhaust gas supercharger 13 located on the left side of the power distribution control cabinet 12 is fixedly installed on the top surface of the equipment carrier plate 11. An exhaust gas input pipe 14 is fixedly connected to the front of the exhaust gas supercharger 13, and the other end of the exhaust gas input pipe 14 is connected to the exhaust gas source. The top surface of the exhaust gas supercharger 13 is fixedly connected to the exhaust gas delivery pipe 15, please refer to Figure 2 The other end of the exhaust gas delivery pipe 15 is equipped with a high-pressure adsorption device 2, which includes a lower reducer 22, which is fixedly connected to the end of the exhaust gas delivery pipe 15, and the top of the lower reducer 22 is fixedly connected to a high-pressure adsorption cylinder 21, and the top of the high-pressure adsorption cylinder 21 is bolted with a sealing cover 26, and the sealing cover 26 is provided with a pressure-maintaining exhaust member 3, please refer to Figure 4 The pressure-maintaining exhaust member 3 includes a pressure-maintaining exhaust column 301, which is fixedly connected to the top surface of the sealing cover 26. Figure 2 A negative pressure desorption component 4 is provided on the outside of the high pressure adsorption cylinder 21, and the negative pressure desorption component 4 includes a negative pressure tank body 41, which is fixedly sleeved on the outside of the high pressure adsorption cylinder 21, and the high pressure adsorption cylinder 21 is fixedly plugged on the top surface of the negative pressure tank body 41, and the sealing cover 26 is located above the negative pressure tank body 41, and the lower tapered pipe 22 is located inside the negative pressure tank body 41, and the exhaust gas delivery pipe 15 is fixedly plugged on the front of the negative pressure tank body 41, and the negative pressure tank body 41 is fixedly connected to the equipment carrier plate 1 1 and is located on the left side of the power distribution control cabinet 12 and behind the exhaust gas supercharger 13. A reciprocating lifting mechanism 5 is provided on the bottom surface of the inner cavity of the negative pressure tank body 41. The reciprocating lifting mechanism 5 includes a reciprocating lifting motor 51. The reciprocating lifting motor 51 is fixedly installed on the bottom surface of the inner cavity of the negative pressure tank body 41. The reciprocating lifting motor 51 is electrically connected to the power distribution control cabinet 12. The outer part of the output shaft of the reciprocating lifting motor 51 is fixedly sleeved with a rotating driving gear 52 located at its top. Please refer to Figure 3 A desorption unit assembly 6 is provided inside the high-pressure adsorption cylinder 21, and the desorption unit assembly 6 includes a guide cone tube 601, and the guide cone tube 601 is fixedly connected to the inner wall of the high-pressure adsorption cylinder 21. A smoothing mechanism 7 is provided on the top surface of the inner cavity of the sealing cover 26, and the smoothing mechanism 7 includes a plug-in sealing column 71, and the plug-in sealing column 71 is fixedly connected to the top surface of the inner cavity of the sealing cover 26. The bottom end of the plug-in sealing column 71 is movably plugged into the interior of the high-pressure adsorption cylinder 21 to pressurize the exhaust gas and pass the high-pressure exhaust gas into the high-pressure adsorption equipment 2.

[0030] See also Figure 3The high-pressure adsorption device 2 also includes a bearing orifice plate 23, which is fixedly connected to the inner wall of the lower tapered tube 22. Alumina particles 24 are stored on the top surface of the bearing orifice plate 23. The alumina particles 24 are used for dehydration. The bottom end of the guide cone 601 is movably inserted into the interior of the alumina particles 24. The high-pressure adsorption device 2 also includes VOCs adsorption particles 25. The VOCs adsorption particles 25 are filled in the interior of the high-pressure adsorption cylinder 21 and are located above the guide cone 601. The VOCs adsorption particles 25 fill the guide cone 601 and are used for high-pressure adsorption of organic matter in the exhaust gas. The organic matter in the exhaust gas is adsorbed and fixed to achieve the purpose of purification. The setting of a high-pressure adsorption device 2 reduces the manufacturing cost of the device for purifying and recovering VOCs in the exhaust gas, and reduces the size of the equipment, and occupies a smaller area. Please refer to Figure 2 A pressure sensor is fixedly connected to the right side surface of the high-pressure adsorption cylinder 21.

[0031] See also Figure 4The pressure-maintaining exhaust component 3 also includes a pressure-maintaining exhaust cavity 302, which is arranged inside the pressure-maintaining exhaust column 301. A conical air hole 303 is arranged on the bottom surface of the inner cavity of the pressure-maintaining exhaust cavity 302. The bottom end of the conical air hole 303 is connected to the gas delivery groove 73. A conical air plug 304 is movably inserted inside the conical air hole 303. A guide slide bar 305 is fixedly connected to the top surface of the conical air plug 304. The top end of the guide slide bar 305 extends from the top surface of the pressure-maintaining exhaust column 301. The guide slide bar The outer part of 305 is movably sleeved with a pressure-maintaining exhaust spring 306 and a pressure-maintaining adjustment ring 307 located inside the pressure-maintaining exhaust chamber 302. The top surface of the conical air plug 304 is transmission-connected with the pressure-maintaining adjustment ring 307 through the pressure-maintaining exhaust spring 306. The top surface of the pressure-maintaining adjustment ring 307 is movably sleeved with a pressure-maintaining external threaded tube 308. The top of the pressure-maintaining external threaded tube 308 extends from the top surface of the pressure-maintaining exhaust column 301. The outer part of the pressure-maintaining external threaded tube 308 can be fixedly sleeved with a hexagonal ring, which is convenient for people to rotate the pressure-maintaining external threaded tube The corrugated tube 308 is used to adjust the air pressure inside the high-pressure adsorption device 2. The pressure-maintaining external threaded tube 308 is threadedly matched with the pressure-maintaining exhaust column 301. The pressure-maintaining external threaded tube 308 is slidably sleeved on the outside of the guide slide bar 305. The pressure-maintaining exhaust component 3 also includes an external threaded mounting convex tube 309. The external threaded mounting convex tube 309 is movably sleeved on the outside of the pressure-maintaining external threaded tube 308 and fixedly connected to the top surface of the pressure-maintaining exhaust column 301. The external thread of the external threaded mounting convex tube 309 is sleeved with a protective cap tube 310. The protective cap The bottom end of the cylinder 310 is in contact with and connected to the top surface of the pressure-maintaining exhaust column 301. The top ends of the guide slide rod 305 and the pressure-maintaining external threaded tube 308 are movably inserted into the interior of the protective cap cylinder 310. The pressure-maintaining exhaust component 3 also includes an exhaust branch pipe 311, which is fixedly connected to the right side surface of the pressure-maintaining exhaust column 301. The exhaust branch pipe 311 is connected to the pressure-maintaining exhaust cavity 302. An exhaust gas detection head is fixedly inserted into the exhaust branch pipe 311 to maintain the air pressure inside the high-pressure adsorption equipment 2 within the adsorption pressure range.

[0032] See also Figure 2 The negative pressure desorption component 4 also includes a negative pressure partition 42, which is fixedly connected to the inner wall of the negative pressure tank body 41. A negative pressure desorption chamber 43 is formed above the negative pressure partition 42, and an equipment installation chamber 44 is formed below the negative pressure partition 42. The high-pressure adsorption cylinder 21 and the lower tapered tube 22 are located inside the negative pressure desorption chamber 43. The reciprocating lifting motor 51 and the rotating drive gear 52 are located inside the equipment installation chamber 44. A vacuum negative pressure pipe 45 is fixedly plugged into the left side surface of the inner cavity of the negative pressure desorption chamber 43. The vacuum negative pressure pipe 45 is fixedly plugged into the left side surface of the negative pressure tank body 41. The left end of the vacuum negative pressure pipe 45 extends to the outside of the negative pressure tank body 41 and is fixedly connected to a vacuum pump 46. The vacuum pump 46 is fixedly installed on the top surface of the equipment carrier plate 11. The vacuum pump 46 is electrically connected to the power distribution control cabinet 12 for negative pressure desorption. The gas outlet on the vacuum pump 46 is connected to the subsequent processing unit. Please refer to Figure 1 A pressure sensor is fixedly connected to the left side surface of the negative pressure tank body 41, so that a low-pressure desorption environment is set in the device for purifying and recovering VOCs in exhaust gas.

[0033] See also Figure 5 The reciprocating lifting mechanism 5 also includes a base bearing 53, the number of which is two. The base bearing 53 is fixedly connected to the bottom surface of the inner cavity of the negative pressure tank body 41, and the two base bearings 53 are respectively located at the left and right ends of the bottom surface of the inner cavity of the negative pressure tank body 41. The base bearing 53 is internally movably inserted with a linkage vertical pipe 54, and a reciprocating lifting block 55 located at the top thereof is fixedly connected to the inner wall of the linkage vertical pipe 54. A reciprocating threaded rod 56 is internally movably inserted into the reciprocating lifting block 55, and the reciprocating threaded rod 56 is threadedly matched with the reciprocating lifting block 55. The top of the reciprocating threaded rod 56 is fixedly connected to a reciprocating lifting vertical rod 57, please refer to the figure of the high-pressure adsorption device 2, the outer sliding sleeve of the reciprocating lifting vertical rod 57 is connected with a sliding rod seal 58, and the sliding rod seal 58 is fixedly inserted on the negative pressure partition 42, and the outer fixed sleeve of the linkage vertical pipe 54 is connected with a driven gear 59, which is meshed with the rotating drive gear 52 to drive the desorption unit assembly 6 to reciprocate up and down.

[0034] See also Figure 3 The desorption unit assembly 6 also includes a gas rising hole 602 and an inclined drop pipe 603. The gas rising hole 602 is opened on the guide cone 601. The inclined drop pipe 603 is fixedly connected to the bottom end of the guide cone 601. The other end of the inclined drop pipe 603 extends from the right side of the lower tapered tube 22. Please refer to Figure 7 The desorption unit assembly 6 also includes a desorption unit cylinder 604, which is located in the interlayer between the high-pressure adsorption cylinder 21 and the negative pressure tank body 41. The top of the desorption unit cylinder 604 is open. The number of the desorption unit cylinders 604 is thirteen, and the thirteen desorption unit cylinders 604 are evenly surrounded by the outside of the high-pressure adsorption cylinder 21. Please refer to Figure 2 , the thirteen desorption unit cylinders 604 are arranged in a counterclockwise spiral upward trajectory, see Figure 7 The desorption unit cylinder 604 is fixedly connected with a mounting plate 605, and the other end of the mounting plate 605 is fixedly connected to the inner wall of the negative pressure tank body 41, see Figure 6 The desorption unit cylinder 604 is slidably plugged with an upper air-tight long plug 606 and a lower air-tight long plug 608, a fixed-distance short rod 607 is fixedly connected between the upper air-tight long plug 606 and the lower air-tight long plug 608, a vertical power support rod 609 is fixedly connected to the bottom surface of the lower air-tight long plug 608, the bottom end of the vertical power support rod 609 extends to the outside of the desorption unit cylinder 604 and is fixedly connected to a vertical power ring 610, please refer to Figure 2The vertical power ring 610 is slidably inserted into the interior of the negative pressure tank 41, the bottom surface of the vertical power ring 610 is fixedly connected to the top of the reciprocating lifting vertical rod 57, and the vertical power ring 610 is slidably sleeved on the outside of the exhaust gas conveying pipe 15, please refer to Figure 7 The other end of the inclined drop pipe 603 is fixedly connected to the middle position of the desorption unit tube 604 at the bottom of the high-pressure adsorption cylinder 21. The bottom desorption unit tube 604 is numbered as the first, and the other desorption unit tubes 604 are numbered in a spiral upward according to their distribution trajectory. The bottom desorption unit tube 604 is connected to the venting inclined pipe 611 located on its right side, and the venting inclined pipe 611 is connected to the venting bent pipe 612, please refer to Figure 1 The other end of the venting bent pipe 612 extends to the outside of the negative pressure tank 41 and is fixedly connected to the exhaust gas inlet pipe 14. Figure 2 The other end of the venting inclined tube 611 is inclined downward and connected to the middle position of the second desorption unit tube 604, and the other two adjacent desorption unit tubes 604 are connected with a negative pressure desorption hole tube 613, the clockwise end of the negative pressure desorption hole tube 613 is connected to the top position of the corresponding desorption unit tube 604, and the counterclockwise end of the negative pressure desorption hole tube 613 is connected to the middle position of the corresponding desorption unit tube 604, the clockwise end of the negative pressure desorption hole tube 613 is higher than the counterclockwise end of the negative pressure desorption hole tube 613, and the desorption unit tube 604 at the end of the number is connected with a particle reset inclined tube 614, and the other end of the particle reset inclined tube 614 is inclined downward and connected to the high pressure adsorption tube 21. On the surface, the interlayer space between the upper air-sealing long plug 606 and the lower air-sealing long plug 608 is adapted to the inclined dropping pipe 603, the emptying inclined pipe 611, the negative pressure desorption hole pipe 613, and the particle resetting inclined pipe 614, which are used to transfer the VOCs adsorption particles 25 that are saturated with adsorption inside the high-pressure adsorption device 2 and make them undergo the process of emptying, negative pressure desorption, and reflux to the inside of the high-pressure adsorption device 2 in sequence, so that the purification and recovery device for VOCs in exhaust gas can achieve continuous purification of exhaust gas, does not require the use of solenoid valves, and has a low failure rate. The environment inside the high-pressure adsorption device 2 and the negative pressure desorption component 4 does not need to be converted between high and low pressure during the exhaust gas purification process, which reduces energy consumption and has low use costs.

[0035] See also Figure 3The smoothing mechanism 7 also includes a smoothing conical groove 72, which is provided on the bottom surface of the plug-in sealing cylinder 71, and a gas delivery groove 73 is provided on the top surface of the inner cavity of the smoothing conical groove 72, and the gas delivery groove 73 is communicated with the conical air hole 303. A fixed wing strip 74 is fixedly connected to the inner wall of the smoothing conical groove 72, and a fixed long tube 75 is fixedly connected to the other end of the fixed wing strip 74. A rotating central axis 76 is movably inserted in the interior of the fixed long tube 75, and the top end of the rotating central axis 76 extends to the gas delivery groove 73. A pneumatic blade 77 is fixedly sleeved inside the device 2, and a smoothing rotating bar 78 is fixedly connected to the bottom end of the rotating central axis 76. The smoothing rotating bar 78 is movably inserted into the interior of the high-pressure adsorption cylinder 21 and adapted to the VOCs adsorption particles 25. The VOCs adsorption particles 25 circulating into the high-pressure adsorption device 2 are moved so that the VOCs adsorption particles 25 are spread out inside the high-pressure adsorption device 2, which helps to increase the quality of exhaust gas treatment and improves the practicability of the device for purifying and recovering VOCs in exhaust gas.

[0036] Working principle:

[0037] First, the power distribution control cabinet 12 controls the vacuum pump 46 to work, and then the vacuum pump 46 extracts the air inside the negative pressure desorption chamber 43 through the vacuum negative pressure pipe 45 and sends it to the next processing unit, and then a negative pressure environment is formed inside the negative pressure desorption chamber 43, and then the pressure sensor on the negative pressure tank body 41 constantly monitors the pressure value inside the negative pressure desorption chamber 43 and sends it to the power distribution control cabinet 12, and then when the pressure value inside the negative pressure desorption chamber 43 falls within the preset negative pressure range inside the power distribution control cabinet 12, the power distribution control cabinet 12 controls the vacuum pump 46 to stop, and when the pressure value inside the negative pressure desorption chamber 43 falls outside the preset negative pressure range inside the power distribution control cabinet 12, the power distribution control cabinet 12 controls the vacuum pump 46 to start, so as to ensure that the negative pressure desorption chamber 43 is The air pressure in the lower part is always maintained within the negative pressure range required for desorption, and then the power distribution control cabinet 12 controls the exhaust gas supercharger 13 to work, and then the exhaust gas enters the lower reducer 22 through the exhaust gas inlet pipe 14 and the exhaust gas delivery pipe 15 driven by the exhaust gas supercharger 13, and then the exhaust gas flows upward inside the lower reducer 22, and then the exhaust gas passes through the fixed holes on the bearing orifice plate 23 and passes through the gap inside the alumina particles 24, the alumina particles 24 dehumidify the exhaust gas, and then the exhaust gas enters the high-pressure adsorption cylinder 21 upward, and then the exhaust gas passes through the gas rising hole 602 into the gap inside the VOCs adsorption particles 25, and then the exhaust gas flows upward in the gap inside the VOCs adsorption particles 25, and then the VOCs adsorption particles 25 remove the organic matter in the exhaust gas. The substances are adsorbed and fixed, and then the air pressure inside the high-pressure adsorption cylinder 21 gradually increases. Then, the organic substances adsorbed and fixed by the VOCs adsorption particles 25 gradually increase. Then, since the gas delivery groove 73 is connected with the high-pressure adsorption cylinder 21 through the flattened conical groove 72, the air pressure inside the gas delivery groove 73 increases synchronously. Then, the conical air plug 304 moves upward under the action of the air pressure difference. Then, the conical air plug 304 moves upward with the guide slide bar 305 and squeezes the pressure-maintaining exhaust spring 306. Then, the pressure-maintaining exhaust spring 306 is elastically compressed, and the elastic potential energy increases. Then, the conical air hole 303 is opened. Then, the waste gas treated by the VOCs adsorption particles 25 forms tail gas, and then the tail gas passes through the flattened conical groove 72 and the gas delivery groove under the action of air pressure. The groove 73 and the conical air hole 303 enter the pressure-maintaining exhaust chamber 302 and are discharged from the exhaust branch pipe 311. Then the exhaust gas detection head performs real-time detection on the exhaust gas and sends the relevant information to the distribution control cabinet 12. Then the distribution control cabinet 12 detects that the exhaust gas contains VOCs through the exhaust gas detection head. Then the distribution control cabinet 12 controls the reciprocating lifting motor 51 to run. Then the reciprocating lifting motor 51 drives the rotating drive gear 52 to rotate. Then the rotating drive gear 52 drives the linkage vertical pipe 54 to rotate through the meshing action between it and the driven gear 59. Then the linkage vertical pipe 54 drives the reciprocating lifting block 55 to rotate. Then the reciprocating threaded rod 56 drives the reciprocating lifting vertical rod 57 to move up and down under the action of the threaded cooperation between it and the reciprocating lifting block 55.Afterwards, the VOCs adsorption particles 25 enter the first desorption unit tube 604 through the guide cone 601 and the inclined drop pipe 603 under the action of gravity and are located in the gap between the upper air-tight long plug 606 and the lower air-tight long plug 608. Then, the reciprocating lifting vertical rod 57 moves up and down with the vertical power support rod 609 through the vertical power circle 610. Then, when the vertical power support rod 609 moves upward, the vertical power support rod 609 moves upward with the lower air-tight long plug 608, the fixed-distance short rod 607, and the upper air-tight long plug 606. At the same time, the VOCs adsorption particles 25 in the narrow gap between the upper air-tight long plug 606 and the lower air-tight long plug 608 move upward synchronously. Then, the lower air-tight long plug 608 blocks the inclined drop pipe 603, and the remaining lower air-tight long plugs 608 respectively blocks the lower ends of the venting inclined pipe 611 and the negative pressure desorption hole pipe 613, and then the slit between the upper air-sealing long plug 606 and the lower air-sealing long plug 608 is aligned with the venting inclined pipe 611, and then the VOCs adsorption particles 25 in the slit slide into the interior of the venting inclined pipe 611 under the action of gravity, and then the high-pressure exhaust gas in the gap between these VOCs adsorption particles 25 is merged into the exhaust gas input pipe 14 through the venting bent pipe 612 under the action of pressure to achieve venting, and then the vertical power support rod 609 moves downward with the lower air-sealing long plug 608, the fixed-distance short rod 607, and the upper air-sealing long plug 606. At this time, the lower air-sealing long plug 608 still blocks the end of the inclined dropping pipe 603, and then the upper air-sealing long plug 606 blocks the venting inclined pipe 603. The higher end of the inclined tube 611 is blocked, and then the upper air-tight long plug 606 and the lower air-tight long plug 608 continue to slide downward. During this process, the upper air-tight long plug 606 always blocks the higher end of the venting inclined tube 611, and then the lower air-tight long plug 608 opens the end of the inclined blanking tube 603. After that, the slit between the upper air-tight long plug 606 and the lower air-tight long plug 608 is aligned with the negative pressure desorption hole tube 613, and the slits inside the remaining desorption unit tubes 604 are respectively aligned with the lower ports on the corresponding venting inclined tube 611 and the negative pressure desorption hole tube 613. Then, the VOCs adsorption particles 25 inside the high-pressure adsorption cylinder 21 enter the slit again through the guide cone tube 601 and the inclined blanking tube 603 under the action of gravity, and the venting inclined tube 611 is discharged at the same time. The VOCs adsorbed particles 25 inside the inclined tube 611 enter the slit inside the second desorption unit tube 604, and then the vertical power support rod 609 moves upward with the lower air-tight long plug 608, the fixed-distance short rod 607, and the upper air-tight long plug 606. Then, as in the above principle, the VOCs adsorbed particles 25 in the slit inside the first desorption unit tube 604 enter the emptying inclined tube 611, the VOCs adsorbed particles 25 in the slit inside the second desorption unit tube 604 enter the negative pressure desorption hole tube 613 in the counterclockwise direction, and the VOCs adsorbed particles 25 in the slit inside the third desorption unit tube 604 enter the negative pressure desorption hole tube 613 in the counterclockwise direction, and so on, gradually lifting the VOCs adsorbed particles 25 inside the desorption unit tube 604.Then, because the negative pressure desorption hole tube 613 is connected with the negative pressure desorption chamber 43, the VOCs adsorption particles 25 are placed in a negative pressure environment to achieve the purpose of desorption. Then, the desorbed VOCs adsorption particles 25 are gradually lifted by the desorption unit assembly 6 and flow back to the high-pressure adsorption cylinder 21 through the particle reset inclined tube 614. Then, the pneumatic blades 77 rotate with the rotating shaft 76 under the push of the airflow, and then the rotating shaft 76 rotates with the smoothing rotating bar 78. Then, the smoothing rotating bar 78 pushes the VOCs adsorption particles 25 that flow back to the inside of the high-pressure adsorption cylinder 21 to move in a circular motion to achieve the purpose of spreading.

[0038] The above is only a preferred specific implementation manner of the present invention; but the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A device for purifying and recovering VOCs in waste gas, comprising a VOCs waste gas treatment device (1), characterized in that: The VOCs waste gas treatment device (1) comprises an equipment carrier plate (11), a power distribution control cabinet (12) located at the right end of the equipment carrier plate (11) is fixedly connected to the top surface of the equipment carrier plate (11), a waste gas booster (13) located on the left side of the power distribution control cabinet (12) is fixedly installed on the top surface of the equipment carrier plate (11), a waste gas inlet pipe (14) is fixedly connected to the front of the waste gas booster (13), a waste gas delivery pipe (15) is fixedly connected to the top surface of the waste gas booster (13), and a high-pressure adsorption device (2) is installed at the other end of the waste gas delivery pipe (15), wherein the high-pressure adsorption device (2) comprises a lower tapered pipe (22), and the lower tapered pipe (22) is fixedly connected to the At the end of the exhaust gas delivery pipe (15), the top end of the lower tapered pipe (22) is fixedly connected to a high-pressure adsorption cylinder (21), the top end of the high-pressure adsorption cylinder (21) is bolted with a sealing cover (26), a pressure-maintaining exhaust component (3) is provided on the sealing cover (26), the pressure-maintaining exhaust component (3) comprises a pressure-maintaining exhaust column (301), the pressure-maintaining exhaust column (301) is fixedly connected to the top surface of the sealing cover (26), a negative pressure desorption component (4) is provided on the outside of the high-pressure adsorption cylinder (21), the negative pressure desorption component (4) comprises a negative pressure tank body (41), the negative pressure tank body (41) is fixedly sleeved on the outside of the high-pressure adsorption cylinder (21), and the high-pressure adsorption cylinder (21) is fixedly plugged in On the top surface of the negative pressure tank body (41), a sealing cover (26) is located above the negative pressure tank body (41), a lower tapered pipe (22) is located inside the negative pressure tank body (41), an exhaust gas delivery pipe (15) is fixedly plugged into the front surface of the negative pressure tank body (41), the negative pressure tank body (41) is fixedly connected to the top surface of the equipment bearing plate (11) and is located on the left side of the power distribution control cabinet (12) and behind the exhaust gas supercharger (13), a reciprocating lifting mechanism (5) is provided on the bottom surface of the inner cavity of the negative pressure tank body (41), the reciprocating lifting mechanism (5) includes a reciprocating lifting motor (51), and the reciprocating lifting motor (51) is fixedly installed on the bottom surface of the inner cavity of the negative pressure tank body (41), The output shaft on the reciprocating lifting motor (51) is fixedly sleeved with a rotating driving gear (52) at its top end. A desorption unit assembly (6) is provided inside the high-pressure adsorption cylinder (21). The desorption unit assembly (6) includes a guide cone tube (601). The guide cone tube (601) is fixedly connected to the inner wall of the high-pressure adsorption cylinder (21). A smoothing mechanism (7) is provided on the top surface of the inner cavity of the sealing cover (26). The smoothing mechanism (7) includes a plug-in sealing column (71). The plug-in sealing column (71) is fixedly connected to the top surface of the inner cavity of the sealing cover (26). The bottom end of the plug-in sealing column (71) is movably plugged into the interior of the high-pressure adsorption cylinder (21). The negative pressure desorption component (4) further comprises a negative pressure partition (42), the negative pressure partition (42) being fixedly connected to the inner wall of the negative pressure tank body (41), a negative pressure desorption chamber (43) being formed above the negative pressure partition (42), an equipment installation chamber (44) being formed below the negative pressure partition (42), the high pressure adsorption cylinder (21) and the lower tapered tube (22) being located inside the negative pressure desorption chamber (43), the reciprocating lifting motor (51) and the rotating driving gear (52) being located inside the equipment installation chamber (44), an exhaust negative pressure pipe (45) being fixedly plugged into the left side surface of the inner cavity of the negative pressure desorption chamber (43), the exhaust negative pressure pipe (45) being fixedly plugged into the left side surface of the negative pressure tank body (41), the left end of the exhaust negative pressure pipe (45) extending to the outside of the negative pressure tank body (41) and being fixedly connected to a vacuum pump (46), the vacuum pump (46) being fixedly mounted on the top surface of the equipment bearing plate (11); The reciprocating lifting mechanism (5) further comprises a base bearing (53), the number of the base bearings (53) being two, the base bearings (53) being fixedly connected to the bottom surface of the inner cavity of the negative pressure tank body (41), the two base bearings (53) being respectively located at the left and right ends of the bottom surface of the inner cavity of the negative pressure tank body (41), the interior of the base bearing (53) being movably plugged with a linkage vertical pipe (54), the inner wall of the linkage vertical pipe (54) being fixedly connected with a reciprocating lifting block (55) located at the top thereof, the inner wall of the reciprocating lifting block (55) being A reciprocating threaded rod (56) is movably connected to the upper part of the linkage vertical pipe (54), the reciprocating threaded rod (56) is threadably matched with the reciprocating lifting block (55), the top end of the reciprocating threaded rod (56) is fixedly connected to a reciprocating lifting vertical rod (57), the outer portion of the reciprocating lifting vertical rod (57) is slidably sleeved with a sliding rod seal (58), the sliding rod seal (58) is fixedly inserted on the negative pressure partition (42), and the outer portion of the linkage vertical pipe (54) is fixedly sleeved with a driven gear (59), which meshes with the rotating drive gear (52); The desorption unit assembly (6) further comprises a gas rising hole (602) and an inclined drop pipe (603), wherein the gas rising hole (602) is provided on the guide cone tube (601), the inclined drop pipe (603) is fixedly connected to the bottom end of the guide cone tube (601), and the other end of the inclined drop pipe (603) extends out from the right side surface of the lower tapered tube (22). The desorption unit assembly (6) further comprises a desorption unit cylinder (604), wherein the desorption unit cylinder (604) is located in the interlayer between the high-pressure adsorption cylinder (21) and the negative pressure tank body (41), wherein the top end of the desorption unit cylinder (604) is open, and the number of the desorption unit cylinders (604) is thirteen, and the thirteen desorption unit cylinders (604) are evenly surrounded by the outside of the high-pressure adsorption cylinder (21). Thirteen desorption unit cylinders (604) are distributed in a spiral upward trajectory. A mounting plate (605) is fixedly connected to the desorption unit cylinder (604). The other end of the mounting plate (605) is fixedly connected to the inner wall of the negative pressure tank body (41). An upper air-tightening long plug (606) and a lower air-tightening long plug (608) are slidably inserted inside the desorption unit cylinder (604). A fixed-distance short rod (607) is fixedly connected between the upper air-tightening long plug (606) and the lower air-tightening long plug (608). A vertical power support rod (609) is fixedly connected to the bottom surface of the lower air-tightening long plug (608). The bottom end of the vertical power support rod (609) extends to the outside of the desorption unit cylinder (604) and is fixedly connected to a vertical power ring (610). The vertical power ring (610) The vertical power ring (610) is slidably inserted into the interior of the negative pressure tank body (41), the bottom surface of the vertical power ring (610) is fixedly connected to the top of the reciprocating lifting vertical rod (57), the vertical power ring (610) is slidably sleeved on the outside of the exhaust gas conveying pipe (15), the other end of the inclined drop pipe (603) is fixedly connected to the middle position of the bottom desorption unit tube (604) of the high-pressure adsorption cylinder (21), the bottom desorption unit tube (604) is numbered as the first, and the remaining desorption unit tubes (604) are numbered in a spiral upward according to their distribution trajectory, the bottom desorption unit tube (604) is connected to the venting inclined tube (611) located on its right side, the venting inclined tube (611) is connected to the venting bent tube (612), and the other end of the venting bent tube (612) extends to The outside of the negative pressure tank body (41) is fixedly connected to the exhaust gas input pipe (14), the other end of the venting inclined pipe (611) is inclined downward and connected to the middle position of the second desorption unit cylinder (604), and the other two adjacent desorption unit cylinders (604) are connected with a negative pressure desorption hole pipe (613), the clockwise end of the negative pressure desorption hole pipe (613) is connected to the top position of the corresponding desorption unit cylinder (604), and the counterclockwise end of the negative pressure desorption hole pipe (613) is connected to the middle position of the corresponding desorption unit cylinder (604), and the desorption unit cylinder (604) at the end of the number is connected with a particle reset inclined pipe (614), and the other end of the particle reset inclined pipe (614) is inclined downward and connected to the surface of the high-pressure adsorption cylinder (21).The interlayer space between the upper air-blocking long plug (606) and the lower air-blocking long plug (608) is compatible with the inclined material dropping pipe (603), the emptying inclined pipe (611), the negative pressure desorption hole pipe (613), and the particle reset inclined pipe (614).

2. The device for purifying and recovering VOCs in exhaust gas according to claim 1, characterized in that: The high-pressure adsorption device (2) further comprises a bearing orifice plate (23), the bearing orifice plate (23) being fixedly connected to the inner wall of the lower tapered tube (22), aluminum oxide particles (24) being stored on the top surface of the bearing orifice plate (23), the bottom end of the guide cone tube (601) being movably inserted into the interior of the aluminum oxide particles (24), and the high-pressure adsorption device (2) further comprises VOCs adsorption particles (25), the VOCs adsorption particles (25) being filled in the interior of the high-pressure adsorption cylinder (21) and being located above the guide cone tube (601), and the VOCs adsorption particles (25) filling the guide cone tube (601).

3. The device for purifying and recovering VOCs in exhaust gas according to claim 1, characterized in that: The pressure-maintaining exhaust component (3) further comprises a pressure-maintaining exhaust cavity (302), the pressure-maintaining exhaust cavity (302) being arranged inside the pressure-maintaining exhaust column (301), a conical air hole (303) being arranged on the bottom surface of the inner cavity of the pressure-maintaining exhaust cavity (302), a conical air plug (304) being movably inserted inside the conical air hole (303), a guide slide bar (305) being fixedly connected to the top surface of the conical air plug (304), the top end of the guide slide bar (305) extending from the top of the pressure-maintaining exhaust column (301) The guide slide bar (305) extends outward from the pressure-maintaining exhaust column (301), the outer surface of the guide slide bar (305) is movably sleeved with a pressure-maintaining exhaust spring (306) and a pressure-maintaining adjustment ring (307) located inside the pressure-maintaining exhaust chamber (302), the top surface of the conical air plug (304) is transmission-connected to the pressure-maintaining adjustment ring (307) through the pressure-maintaining exhaust spring (306), the top surface of the pressure-maintaining adjustment ring (307) is movably sleeved with a pressure-maintaining external threaded tube (308), the top end of the pressure-maintaining external threaded tube (308) is connected from the top of the pressure-maintaining exhaust column (301), and the pressure-maintaining exhaust column (301) is connected to the pressure-maintaining exhaust column (301). The pressure-maintaining external threaded tube (308) is threadedly matched with the pressure-maintaining exhaust column (301), and the pressure-maintaining external threaded tube (308) is slidably sleeved on the outside of the guide slide bar (305). The pressure-maintaining exhaust component (3) further includes an external threaded mounting convex tube (309), which is movably sleeved on the outside of the pressure-maintaining external threaded tube (308) and fixedly connected to the top surface of the pressure-maintaining exhaust column (301). The external thread of the external threaded mounting convex tube (309) is sleeved with A protective cap barrel (310), the bottom end of the protective cap barrel (310) is in contact with the top surface of the pressure-maintaining exhaust column (301), the top ends of the guide slide rod (305) and the pressure-maintaining external threaded tube (308) are movably plugged into the interior of the protective cap barrel (310), the pressure-maintaining exhaust component (3) further comprises an exhaust branch pipe (311), the exhaust branch pipe (311) is fixedly connected to the right side surface of the pressure-maintaining exhaust column (301), and the exhaust branch pipe (311) is communicated with the pressure-maintaining exhaust cavity (302).

4. The device for purifying and recovering VOCs in exhaust gas according to claim 3, characterized in that: The smoothing mechanism (7) further comprises a smoothing conical groove (72), the smoothing conical groove (72) being provided on the bottom surface of the plug-in sealing cylinder (71), a gas delivery groove (73) being provided on the top surface of the inner cavity of the smoothing conical groove (72), the gas delivery groove (73) being communicated with the conical air hole (303), a fixed wing strip (74) being fixedly connected to the inner wall of the smoothing conical groove (72), the other end of the fixed wing strip (74) being fixedly connected to a fixed long tube (75), a rotating central axis (76) being movably inserted inside the fixed long tube (75), the top end of the rotating central axis (76) extending to the inside of the gas delivery groove (73) and being fixedly sleeved with a pneumatic blade (77), a smoothing rotating strip (78) being fixedly connected to the bottom end of the rotating central axis (76), the smoothing rotating strip (78) being movably inserted inside the high-pressure adsorption cylinder (21) and being compatible with the VOCs adsorption particles (25).

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