A high-efficiency recovery system for atmospheric volatile organic compounds

Abstract

The present invention discloses an efficient recovery system for atmospheric volatile organic compounds, which relates to the technical field of waste gas recovery, including a fan, a concentration device, a heater and a condenser. The concentration device includes an outer shell, a zeolite rotor is rotatably connected to the inside of the outer shell, a motor is fixedly installed on one side of the outer shell, and also includes a speed regulating mechanism. The speed regulating mechanism includes a baffle slidably connected to the inside of the exhaust gas pipe, a spring is provided on one side of the baffle, and a shaft rod is fixedly connected to one side of the baffle that passes through the zeolite rotor and is slidably connected to the zeolite rotor. A speed changing assembly and a regional regulating mechanism are provided between the shaft rod and the motor. The regional regulating mechanism includes two dividing rods. The two dividing rods and the frame divide the surface of the zeolite rotor into an adsorption zone, a desorption zone and a cooling zone. The present application can adjust the rotation speed of the zeolite rotor through the speed changing assembly, and match the rotation speed of the zeolite rotor with the exhaust gas discharge rate, thereby reducing unnecessary energy loss.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas recovery, and in particular to a high-efficiency recovery system for atmospheric volatile organic compounds. Background Art

[0002] Atmospheric volatile organic compounds, referred to as VOCs, refer to organic compounds with a saturated vapor pressure greater than 70 Pa at room temperature and a boiling point below 260°C at normal pressure. They mainly include alkanes, alkenes, alkynes, aromatic hydrocarbons, halogenated hydrocarbons, oxygen-containing organic compounds and nitrogen-containing organic compounds. In the process of organic chemical synthesis, such as the production of coatings, inks, adhesives, pesticides, medicines, fragrances and other products, a large amount of organic solvents and volatile organic raw materials are used. These substances are easily volatilized into the atmosphere during production, storage, transportation and use, becoming an important source of VOCs.

[0003] In order to protect the environment and give full play to the economic value of VOCs, it is necessary to recover VOCs in the atmosphere. The adsorption-desorption-condensation recovery method is one of the most commonly used methods for VOCs recovery. The principle is to use adsorption materials to adsorb VOCs in the exhaust gas, and then desorb VOCs from the adsorption materials by heating, thereby increasing the concentration of VOCs. Finally, VOCs are converted from gaseous to liquid by condensation for recovery. This method has many characteristics such as efficient separation, easy recovery and high technical maturity. It can treat various industries and different types of VOCs exhaust gas, and is therefore widely used.

[0004] Existing VOCs recovery systems generally use zeolite wheels as adsorption materials, converting high-volume, low-concentration VOCs into low-volume, high-concentration VOCs through adsorption and desorption to facilitate VOCs recovery. However, due to changes in the chemical reaction rates between materials during the chemical production process, the amount of waste gas generated will change all the time, while the speed of the zeolite wheel is constant. This makes the efficiency of the zeolite wheel in adsorbing VOCs unable to match the amount of waste gas generated, thereby increasing the energy loss caused by recovering VOCs and increasing the cost of VOCs recovery. Summary of the Invention

[0005] The purpose of the present invention is to propose a high-efficiency recovery system for atmospheric volatile organic compounds in order to solve the problem that the amount of waste gas generated changes all the time, the efficiency of the zeolite wheel in adsorbing VOCs cannot match the amount of waste gas generated, thereby increasing the energy loss generated by recovering VOCs.

[0006] To achieve the above objectives, the present invention adopts the following technology: a high-efficiency recovery system for atmospheric volatile organic compounds: comprising a fan, a concentrating device, a heater, and a condenser, wherein the concentrating device comprises a housing, a zeolite rotor rotatably connected to the interior of the housing, exhaust ducts, hot air ducts, and cold air ducts are provided on both sides of the housing, a motor is fixedly mounted on one side of the housing, and further comprises:

[0007] A speed regulating mechanism, the speed regulating mechanism comprising a baffle slidably connected to the interior of the exhaust pipe, a spring being provided on one side of the baffle, a shaft being fixedly connected to one side of the baffle and penetrating and slidably connected to the zeolite runner, and a speed changing assembly being provided between the shaft and the motor;

[0008] A region adjustment mechanism, the region adjustment mechanism comprising a frame fixed to the interior of the housing and two dividing rods slidably connected to the frame, the two dividing rods and the frame dividing the surface of the zeolite wheel into an adsorption zone, a desorption zone, and a cooling zone;

[0009] The exhaust gas in the exhaust gas pipe pushes the baffle through pressure, and the speed change component dynamically adjusts the rotation speed of the zeolite wheel according to the displacement of the baffle.

[0010] As a further description of the above technical solution: the speed change assembly includes a driven splint 1 fixed to one end of the shaft, one end of the shaft is rotatably connected to a driven splint 2, the drive shaft of the motor is fixedly connected to a rotating shaft, one end of the rotating shaft is fixedly connected to an active splint 1, the outside of the rotating shaft is slidably connected to an active splint 2, a spring 2 is provided between the active splint 2 and the rotating shaft, and a belt is provided between the rotating shaft and the shaft.

[0011] As a further description of the above technical solution: an extrusion block is fixedly connected to the shaft rod, a push rod is slidably connected to the inside of the frame body, a return spring is provided on the top of the push rod, and a support rod is rotatably connected between the push rod and the dividing rod.

[0012] As a further description of the above technical solution: a stirring frame is fixedly connected to one side of the baffle.

[0013] As a further description of the above technical solution: the driven splint 1 and the driven splint 2, the active splint 1 and the active splint 2 are all conical and the conical surfaces are arranged relative to each other, and the belt is clamped between the driven splint 1 and the driven splint 2, and the active splint 1 and the active splint 2.

[0014] As a further description of the above technical solution: it also includes a dispersion unit, which includes a gear fixed to one side of the second driven splint and rotatably connected to the outer shell, one end of one of the hot air ducts is rotatably connected to a connecting pipe connected to the desorption zone, the outside of the connecting pipe is fixedly connected to a gear ring meshing with the gear, and a plurality of guide plates are arranged inside the connecting pipe.

[0015] As a further description of the above technical solution: a counterweight block is slidably connected to the inner tube, and a tension spring is fixedly connected between the counterweight block and the inner tube.

[0016] As a further description of the above technical solution: the guide plate is rotatably connected to the inner tube and a torsion spring is provided at the connection with the inner tube, and a plurality of the guide plates are arranged in a circular array around the inner tube.

[0017] As a further description of the above technical solution: a gap is provided between the inner tube and the connecting tube, and the guide plate is inclined and abuts against the counterweight block.

[0018] As a further description of the above technical solution: it also includes a refrigerator arranged between the fan and the concentration equipment, one side of the condenser is connected to a storage tank for collecting liquefied VOCs, and the exhaust pipe and the exhaust port of the condenser are connected to a smoke exhauster.

[0019] In summary, due to the use of the above-mentioned technology, a high-efficiency recovery system for atmospheric volatile organic compounds has the following beneficial effects:

[0020] The present application can adjust the rotation speed of the zeolite rotor through the speed change component and match the rotation speed of the zeolite rotor with the exhaust gas discharge rate, thereby reducing unnecessary energy loss and lowering the recovery cost of volatile organic compounds;

[0021] The dividing rod can be used to adjust the desorption zone and cooling zone of the zeolite rotor according to the rotation speed of the zeolite rotor, thereby extending the desorption and cooling time and ensuring that the accelerated rotation speed of the zeolite rotor will not lead to incomplete desorption and untimely cooling, thereby improving the use effect of the concentration equipment. In addition, the enlarged desorption zone can also fully preheat the zeolite rotor, which helps to fully desorb the VOCs adsorbed on the zeolite rotor and improve the desorption effect.

[0022] By rotating the guide plate, the hot air entering the desorption zone can be fully diffused, which helps the hot air to completely fill the enlarged desorption zone, exert a preheating effect and improve the desorption effect. The inclination angle of the guide plate can also change with the rotation speed, so that the effect of the guide plate in diffusing the hot air is adapted to the degree of increase in the desorption zone, further improving the desorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A schematic diagram of a recycling process according to an embodiment of the present invention is shown;

[0024] Figure 2 A front schematic diagram of a concentration device provided according to an embodiment of the present invention is shown;

[0025] Figure 3 A schematic diagram of the back side of a concentration device according to an embodiment of the present invention is shown;

[0026] Figure 4 A schematic diagram of a shell explosion according to an embodiment of the present invention is shown;

[0027] Figure 5 shows a schematic cross-sectional view of a housing provided according to an embodiment of the present invention;

[0028] Figure 6 A cross-sectional schematic diagram of an active splint provided in an embodiment of the present invention is shown;

[0029] Figure 7 A schematic diagram of an inner tube explosion according to an embodiment of the present invention is shown;

[0030] Figure 8 A schematic cross-sectional view of an inner tube provided in an embodiment of the present invention is shown;

[0031] Figure 9 The embodiment of the present invention provides Figure 8 Enlarged view of point A in the middle;

[0032] Figure 10 A schematic diagram of a push rod provided according to an embodiment of the present invention is shown.

[0033] Legend:

[0034] 1. Fan; 2. Refrigerator;

[0035] 3. Concentration equipment; 31. Housing; 32. Zeolite rotor; 33. Exhaust gas duct; 34. Hot air duct; 35. Cold air duct; 36. Motor;

[0036] 37. Area adjustment mechanism; 371. Frame; 372. Extrusion block; 373. Push rod; 374. Return spring; 375. Support rod; 376. Dividing rod;

[0037] 38. Speed ​​regulating mechanism; 381. Baffle; 382. Spring 1; 383. Shaft; 384. Speed ​​changing assembly; 3841. Driven splint 1; 3842. Driven splint 2; 3843. Belt; 3844. Rotating shaft; 3845. Active splint 1; 3846. Active splint 2; 3847. Spring 2; 385. Stirring frame;

[0038] 39. Dispersion unit; 391. Gear; 392. Gear ring; 393. Connecting pipe; 394. Inner pipe; 395. Tension spring; 396. Counterweight; 397. Guide plate; 398. Torsion spring;

[0039] 4. Heater; 5. Condenser; 6. Storage tank; 7. Smoke exhauster. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings to clearly and completely describe the technology in the embodiments of the present invention, a high-efficiency recovery system for atmospheric volatile organic compounds. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0041] like Figures 1-10 As shown, the present invention provides an efficient recovery system for atmospheric volatile organic compounds: comprising a fan 1, a concentration device 3, a heater 4, a condenser 5 and a refrigerator 2 arranged between the fan 1 and the concentration device 3, one side of the condenser 5 is connected to a storage tank 6 for collecting liquefied VOCs, and the exhaust pipe 33 and the exhaust port of the condenser 5 are connected to a smoke exhauster 7, the concentration device 3 comprises a shell 31, the interior of the shell 31 is rotatably connected to a zeolite rotor 32, the zeolite has a porous structure, and there are many tiny channels and cavities inside, so that the zeolite has a selective adsorption capacity and can adsorb VOCs in the exhaust gas, exhaust pipes 33, hot air pipes 34 and cold air pipes 35 are provided on both sides of the shell 31, and a motor 36 is fixedly installed on one side of the shell 31, and the exhaust gas generated by chemical production is transported to the exhaust pipe 33 through the fan 1, and is discharged through the zeolite rotor 32 After the VOCs in the exhaust gas are adsorbed, the filtered exhaust gas is discharged through the smoke exhauster 7. At the same time, the air is transported by another fan 1, so that the air enters the cold air duct 35 and passes through the zeolite rotor 32, and the area on the zeolite rotor 32 that has heated up after desorption is cooled so that the area can play the adsorption effect again. At this time, the air absorbs heat and the temperature rises. After being heated, it enters the hot air duct 34. The hot air passes through the zeolite rotor 32, so that the VOCs adsorbed on the zeolite rotor 32 are thermally desorbed, and the VOCs are mixed with the hot air. After the condenser 5 condenses the mixed gas, the VOCs are liquefied and collected and stored in the storage tank 6, and the air is discharged through the smoke exhauster 7. The refrigerator 2 is used to cool the exhaust gas and air, so that the air can fully cool the zeolite rotor 32 and reduce the exhaust gas temperature, thereby improving the adsorption efficiency of the zeolite rotor 32 on VOCs in the exhaust gas.

[0042] The speed regulating mechanism 38 is also included. The speed regulating mechanism 38 includes a baffle 381 slidably connected to the inside of the exhaust pipe 33. A spring 382 is provided on one side of the baffle 381. When the rate of generation of chemical production waste gas increases, the volume of waste gas entering the exhaust pipe 33 per unit time increases, and the air pressure inside the exhaust pipe 33 increases. The faster the rate of generation of waste gas, the greater the distance the baffle 381 moves under pressure. One side of the baffle 381 is fixedly connected to a shaft 38 that penetrates the zeolite runner 32 and is slidably connected to the zeolite runner 32. 3. The middle part of the shaft 383 is square. The rotation of the shaft 383 can drive the zeolite rotor 32 to rotate together. A speed change assembly 384 is provided between the shaft 383 and the motor 36. A stirring frame 385 is fixedly connected to one side of the baffle 381. The motor 36 drives the zeolite rotor 32 to rotate, and at the same time drives the stirring frame 385 to rotate through the shaft 383 and the baffle 381. It can stir and mix the exhaust gas passing through the exhaust pipe 33, so that the VOCs in the exhaust gas are evenly distributed, and the exhaust gas adsorption effect of the zeolite rotor 32 is improved;

[0043] The regional adjustment mechanism 37 includes a frame 371 fixed to the inside of the shell 31 and two dividing rods 376 slidably connected to the frame 371. The two dividing rods 376 and the frame 371 divide the surface of the zeolite rotor 32 into an adsorption zone, a desorption zone and a cooling zone. The exhaust duct 33, the hot air duct 34 and the cold air duct 35 are respectively connected to the adsorption zone, the desorption zone and the cooling zone. When the exhaust gas passes through the adsorption zone, the VOCs in the exhaust gas are adsorbed by the zeolite rotor 32. When the exhaust gas passes through the desorption zone, the VOCs adsorbed by the zeolite rotor 32 are separated and desorbed from the zeolite rotor 32 by the hot air. At this time, the temperature of the zeolite rotor 32 increases. When the zeolite rotor 32 rotates from the heating position to the cooling zone, the zeolite rotor 32 is cooled by the cold air.

[0044] The exhaust gas in the exhaust pipe 33 pushes the baffle 381 through pressure, and the speed change component 384 dynamically adjusts the rotation speed of the zeolite wheel 32 according to the displacement of the baffle 381.

[0045] Reference Figure 5 and Figure 6The speed change assembly 384 includes a driven splint 1 3841 fixed to one end of the shaft 383, one end of the shaft 383 is rotatably connected to the driven splint 2 3842, the drive shaft of the motor 36 is fixedly connected to the rotating shaft 3844, one end of the rotating shaft 3844 is fixedly connected to the active splint 1 3845, the outer side of the rotating shaft 3844 is slidably connected to the active splint 2 3846, a spring 2 3847 is provided between the active splint 2 3846 and the rotating shaft 3844, a belt 3843 is provided between the rotating shaft 3844 and the shaft 383, and the driven splint 3841 is fixed to the driven splint 2 3842. Plate 1 3841 and driven plate 2 3842, active plate 1 3845 and active plate 2 3846 are all conical and their conical surfaces are arranged opposite to each other. Belt 3843 is clamped between driven plate 1 3841 and driven plate 2 3842, active plate 1 3845 and active plate 2 3846. Driven plate 1 3841 and driven plate 2 3842, active plate 1 3845 and active plate 2 3846 respectively form the first wheel and the second wheel. Baffle 381 moves under pressure through shaft 383 to drive the driven plate. The first clamping plate 3841 moves, so that the distance between the second clamping plate 3842 and the first clamping plate 3841 increases. At this time, the belt 3843 contracts inwardly between the first clamping plate 3841 and the second clamping plate 3842, which is equivalent to reducing the diameter of the first wheel. In order to keep the belt 3843 taut, the second active clamping plate 3846 approaches the first active clamping plate 3845 under the elastic force of the second spring 3847, so that the belt 3843 expands outward, which is equivalent to increasing the diameter of the second wheel. Therefore, when the speed of the drive shaft of the motor 36 remains unchanged, the second active clamping plate 3846 is moved closer to the first active clamping plate 3845 under the elastic force of the second spring 3847, so that the belt 3843 expands outward, which is equivalent to increasing the diameter of the second wheel. The speed of the zeolite wheel 32 is accelerated by the second wheel, the belt 3843 and the first wheel, thereby accelerating the position switching speed of the zeolite wheel 32 in the adsorption zone, accelerating the adsorption efficiency of VOCs in the exhaust gas, and preventing VOCs from leaking. The baffle 381 moves a longer distance as the pressure increases, so that the diameter of the second wheel decreases and the diameter of the first wheel increases. Therefore, the rotation speed of the zeolite wheel 32 will increase as the exhaust gas discharge rate increases, ensuring that VOCs are fully adsorbed while reducing the recovery cost of volatile organic compounds.

[0046] Reference Figure 10, the shaft 383 is fixedly connected to the extrusion block 372, the interior of the frame 371 is slidably connected to the push rod 373, the top of the push rod 373 is provided with a return spring 374, the push rod 373 and the dividing rod 376 are rotatably connected with the support rod 375, the movement of the shaft 383 drives the extrusion block 372 to move the push rod 373 upward, so that the push rod 373 pushes the dividing rod 376 through the support rod 375, and expands the distance between the dividing rod 376 and the top of the frame 371, thereby expanding the range of the desorption zone and the cooling zone, the shaft 383 and the extrusion block 372 are fixedly connected to the shaft 383, the interior of the frame 371 is slidably connected to the push rod 373, the top of the push rod 373 is provided with a return spring 374, and the push rod 373 and the dividing rod 376 are rotatably connected. The greater the moving distance of block 372, the greater the height of the push rod 373 pushed upward, and the greater the moving distance of the dividing rod 376. Therefore, the exhaust gas generation rate is faster, and the range of the desorption zone and the adsorption zone is larger, so that the zeolite wheel 32 can accelerate the rotation speed to improve the VOCs adsorption efficiency while accelerating the desorption efficiency of VOCs in the desorption zone, thereby improving the VOCs extraction effect. In addition, expanding the range of the cooling zone can extend the cooling time of the zeolite wheel 32, so that the zeolite wheel 32 can accelerate the rotation speed while being fully cooled, which is convenient for adsorbing VOCs again.

[0047] Reference Figure 3 and Figure 7-Figure 9, further comprising a dispersion unit 39, the dispersion unit 39 comprising a gear 391 fixed to one side of the driven clamping plate 2 3842 and rotatably connected to the housing 31, one end of one hot air duct 34 is rotatably connected to a connecting pipe 393 communicating with the desorption zone, the outside of the connecting pipe 393 is fixedly connected to a gear ring 392 meshing with the gear 391, the second wheel rotates to drive the gear 391 to rotate, thereby driving the connecting pipe 393 to accelerate rotation through the gear ring 392, and a plurality of guide plates 3 are provided inside the connecting pipe 393 97, a gap is provided between the inner tube 394 and the connecting tube 393. The guide plate 397 pushes the hot air entering the desorption zone through the gap outward during the rotation process, so that the hot air can be fully diffused inside the desorption zone, making it easier for the hot air to fill the enlarged desorption zone space, so as to give full play to the desorption effect. The closer to the hot air duct 34, the higher the heat. When the zeolite wheel 32 rotates and enters the edge of the desorption zone, the hot air in the desorption zone preheats the zeolite wheel 32, thereby accelerating the efficiency of subsequent VOCs desorption. A counterweight 396 is slidably connected to the inner tube 394, and a tension spring 395 is fixedly connected between the counterweight 396 and the inner tube 394. The guide plate 397 is rotatably connected to the inner tube 394 and a torsion spring 398 is provided at the connection with the inner tube 394. Several guide plates 397 are arranged in a circular array around the inner tube 394. The guide plates 397 are inclined and abut against the counterweight 396. The faster the rotation speed of the inner tube 394, the greater the centrifugal force on the counterweight 396. When the centrifugal force is greater than the elastic force of the tension spring 395, the counterweight The weight 396 moves in a direction away from the axis of the inner tube 394, pushing the guide plate 397 outward, so that the range of the hot air pushed by the guide plate 397 is increased, meeting the heat supply of the expanded desorption zone and improving the desorption effect. The inner tube 394 is provided with a guide plate inside, which is used to spiral the hot air into the desorption zone and contact the zeolite wheel 32 during rotation, thereby increasing the complexity of the hot air flow path. Compared with linear flow, it can act more fully on the zeolite wheel 32, thereby improving heat exchange efficiency and accelerating desorption.

[0048] Working principle: Exhaust gas enters the housing 31 through the exhaust gas pipe 33, and the zeolite rotor 32 filters and adsorbs VOCs in the exhaust gas. The filtered exhaust gas is discharged through the smoke exhauster 7. The motor 36 drives the zeolite rotor 32 to rotate through the first rotor, belt 3843, second rotor and shaft 383, so that the position on the zeolite rotor 32 where VOCs are adsorbed rotates to the desorption zone. Hot air is pumped by the fan 1 to desorb the VOCs. The position on the zeolite rotor 32 where the desorption temperature rises rotates to the cooling zone, and the cooled position rotates to the adsorption zone to adsorb VOCs again.

[0049] The pressure generated when the exhaust gas passes through the exhaust pipe 33 drives the baffle 381 to move toward the housing 31, driving the shaft 383 and the driven splint 1 3841 to move, so that the distance between the driven splint 1 3841 and the driven splint 2 3842 increases, and the belt 3843 slides and contracts between the driven splint 1 3841 and the driven splint 2 3842. At this time, the active splint 2 3846 approaches the active splint 1 3845 under the elastic force of the spring 2 3847, so that the belt 3843 is tightened and expands outward, so that the driven splint 1 The diameter of the second rotor composed of the first clamping plate 3841 and the second driven clamping plate 3842 is reduced, and the diameter of the first rotor composed of the second active clamping plate 3846 and the first active clamping plate 3845 is increased. When the zeolite rotor 32 is driven to rotate by the first rotor, belt 3843, second rotor and shaft 383 while the speed of the drive shaft of the motor 36 remains unchanged, the speed of the zeolite rotor 32 is accelerated, which speeds up the passage of the position on the zeolite rotor 32 where no VOCs are adsorbed through the adsorption zone, thereby fully adsorbing the incremental VOCs in the exhaust gas.

[0050] When the shaft 383 moves, it also drives the extrusion block 372 to move, pushing the push rod 373 upward, so that the push rod 373 supports the dividing rod 376 to both sides through the support rod 375, thereby increasing the distance between the dividing rod 376 and the top partition of the frame 371, thereby increasing the range of the desorption zone and the cooling zone, so that sufficient desorption and cooling can be ensured even when the speed of the zeolite wheel 32 is increased;

[0051] The rotation of the second wheel drives the gear 391 to rotate, which drives the connecting pipe 393 and the inner pipe 394 to rotate through the gear ring 392, so that the guide plate 397 rotates to push the hot air transported from the gap between the connecting pipe 393 and the inner pipe 394 to the desorption zone outward, so that the hot air is fully diffused in the desorption zone, meeting the desorption effect of the expanded desorption zone and preheating the VOCs before desorption;

[0052] When the inner tube 394 drives the counterweight 396 to rotate, as the rotation speed of the inner tube 394 increases, the centrifugal force on the counterweight 396 increases. When the centrifugal force is greater than the elastic force of the tension spring 395, the counterweight 396 moves in the direction away from the axis of the inner tube 394, the tension spring 395 is further stretched, and the counterweight 396 pushes the guide plate 397 outward, increasing the opening range of the guide plate 397, thereby further increasing the range of the hot air pushed by the guide plate 397 and improving the desorption effect.

[0053] The above description is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field of the present invention, within the technical scope disclosed by the present invention, can make equivalent replacements or changes to the atmospheric volatile organic compound efficient recovery system and its inventive concept according to the technology of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-efficiency recovery system for atmospheric volatile organic compounds, comprising a fan (1), a concentration device (3), a heater (4) and a condenser (5), wherein the concentration device (3) comprises a housing (31), a zeolite rotor (32) is rotatably connected to the interior of the housing (31), an exhaust duct (33), a hot air duct (34) and a cold air duct (35) are provided on both sides of the housing (31), and a motor (36) is fixedly mounted on one side of the housing (31), characterized in that: Also includes: A speed regulating mechanism (38), the speed regulating mechanism (38) comprising a baffle (381) slidably connected to the interior of the exhaust pipe (33), a spring (382) being provided on one side of the baffle (381), a shaft (383) being fixedly connected to one side of the baffle (381) and penetrating the zeolite rotor (32) and slidably connected to the zeolite rotor (32), and a speed changing assembly (384) being provided between the shaft (383) and the motor (36); A region adjustment mechanism (37), the region adjustment mechanism (37) comprising a frame (371) fixed inside the housing (31) and two dividing rods (376) slidably connected to the frame (371), the two dividing rods (376) and the frame (371) dividing the surface of the zeolite wheel (32) into an adsorption zone, a desorption zone, and a cooling zone; The shaft (383) is fixedly connected to an extrusion block (372), the interior of the frame (371) is slidably connected to a push rod (373), a return spring (374) is provided on the top of the push rod (373), and a support rod (375) is rotatably connected between the push rod (373) and the dividing rod (376); The exhaust gas in the exhaust gas pipe (33) pushes the baffle (381) by pressure, and the speed change component (384) dynamically adjusts the rotation speed of the zeolite wheel (32) according to the displacement of the baffle (381).

2. The high-efficiency recovery system for atmospheric volatile organic compounds according to claim 1, characterized in that: The speed change assembly (384) includes a driven splint 1 (3841) fixed to one end of the shaft (383), one end of the shaft (383) is rotatably connected to a driven splint 2 (3842), a driving shaft of the motor (36) is fixedly connected to a rotating shaft (3844), one end of the rotating shaft (3844) is fixedly connected to an active splint 1 (3845), the outside of the rotating shaft (3844) is slidably connected to an active splint 2 (3846), a spring 2 (3847) is provided between the active splint 2 (3846) and the rotating shaft (3844), and a belt (3843) is wound between the rotating shaft (3844) and the shaft (383).

3. The high-efficiency recovery system for atmospheric volatile organic compounds according to claim 2, characterized in that: A stirring frame (385) is fixedly connected to one side of the baffle (381).

4. The high-efficiency recovery system for atmospheric volatile organic compounds according to claim 2, characterized in that: The driven splint 1 (3841) and the driven splint 2 (3842), the active splint 1 (3845) and the active splint 2 (3846) are all conical and their conical surfaces are arranged relative to each other, and the belt (3843) is clamped between the driven splint 1 (3841) and the driven splint 2 (3842), and the active splint 1 (3845) and the active splint 2 (3846).

5. The high-efficiency recovery system for atmospheric volatile organic compounds according to claim 2, characterized in that: It also includes a dispersion unit (39), which includes a gear (391) fixed to one side of the second driven splint (3842) and rotatably connected to the outer shell (31), one end of one of the hot air ducts (34) is rotatably connected to a connecting pipe (393) connected to the desorption zone, the outside of the connecting pipe (393) is fixedly connected to a gear ring (392) meshing with the gear (391), and the inside of the connecting pipe (393) is provided with a plurality of guide plates (397).

6. The high-efficiency recovery system for atmospheric volatile organic compounds according to claim 5, characterized in that: The guide plate (397) is rotatably connected to the inner tube (394) and a torsion spring (398) is provided at the connection with the inner tube (394). A plurality of the guide plates (397) are arranged in a circular array around the inner tube (394).

7. The high-efficiency recovery system for atmospheric volatile organic compounds according to claim 6, characterized in that: A counterweight (396) is slidably connected to the inner tube (394), and a tension spring (395) is fixedly connected between the counterweight (396) and the inner tube (394).

8. The high-efficiency recovery system for atmospheric volatile organic compounds according to claim 7, characterized in that: A gap is provided between the inner tube (394) and the connecting tube (393), and the guide plate (397) is inclined and abuts against the counterweight (396).

9. The high-efficiency recovery system for atmospheric volatile organic compounds according to claim 1, characterized in that: The system further comprises a refrigerator (2) disposed between the fan (1) and the concentration device (3); one side of the condenser (5) is connected to a storage tank (6) for collecting liquefied VOCs; and the exhaust pipe (33) and the exhaust outlet of the condenser (5) are connected to a smoke exhauster (7).

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