A VOCs treatment system

Abstract

The present invention discloses a VOCs treatment system, which relates to the technical field of waste gas treatment. When a VOCs concentration detection sensor detects that the exhaust gas concentration reaches a certain value, an electric telescopic rod is started through a controller, and the electric telescopic rod begins to extend and pushes down an upper fixed plate, so that the upper fixed plate drives two symmetrical telescopic pipes at the upper ends to fall synchronously. At the same time, the upper fixed plate exerts a downward squeezing effect on the upper ends of two spiral shells, so that the two spiral shells together with the catalytic units inside are gradually compressed. At this time, the spiral amplitude of the spiral shell increases, and the rising speed of the exhaust gas in the spiral shell is reduced again, and the contact time with the inner wall of the channel is increased again, thereby further improving the adsorption efficiency of the catalytic unit. At the same time, when the VOCs concentration of the exhaust gas is lower than the qualified range, the spiral shell begins to reset to the initial state, so as to always keep the catalytic unit inside the spiral shell with a high-efficiency adsorption effect.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a VOCs treatment system. Background Art

[0002] VOCs, also known as volatile organic compounds, refer to organic compounds with a saturated vapor pressure greater than 70.91 Pa at room temperature, a boiling point below 50~260℃ at a standard atmospheric pressure of 101.3kPa, and an initial distillation point equal to 250 degrees Celsius, or any volatile organic solid or liquid at room temperature and pressure. At present, VOCs waste gas is mostly treated by regenerative combustion technology. The process of regenerative combustion treatment of waste gas is as follows: VOCs organic waste gas is first preheated through a heat exchanger, and then fully burned in the combustion chamber to reach the required reaction temperature, 300-400℃. Finally, the oxidation reaction is carried out in a catalytic reactor, and the waste gas after combustion is passed through After the catalytic bed, the organic matter in VOCs will be adsorbed on the catalytic bed, which is the adsorption process. Then the air is introduced, and the oxygen in the air is heated and adsorbed, and then reacts with the adsorbed organic matter to produce CO2 and H2O. CO2 is discharged, and H2O is consumed by heat to become steam, which is the desorption process. Finally, through the two stages of adsorption and desorption, the organic gas is turned into non-toxic and harmless gas. Among them, the VOCs waste gas catalytic bed, also known as the adsorption bed, is composed of multiple catalytic units connected by channels. Each catalytic unit weighs up to 20kg and can adsorb VOCs for several hours. S The weight of the post-catalytic unit can reach 23-25kg, the adsorption rate can be up to 20% of its own weight, and it changes from yellow to carbon black.

[0003] For example, a high-adsorption industrial waste gas treatment device with publication number CN117942757A is designed with a chamber-type but not body-type reactor based on the high adsorption and high-proportion weight change principle of the catalytic bed. Adsorption is carried out on one side of the cavity and desorption is carried out on the other side simultaneously. When the adsorption and desorption are completed, due to the obvious weight changes on both sides, a special structure is used to realize the rotation of the central axis and switch the generation of VOCs waste gas and air. On the basis of ensuring the continuous introduction of VOCs waste gas and air, the orderly arrangement of air and VOCs waste gas is realized, thereby maximizing the waste gas treatment efficiency.

[0004] This scheme proposes an efficient solution for the orderly arrangement of air and VOCs waste gas. However, in fact, in the process of VOCs waste gas treatment, since the catalytic units are stacked like coal balls, the airways are formed by the corresponding connection of the channels between the catalytic units. When the waste gas passes through, the inner wall of the dense airway will adsorb the organic matter in the waste gas to achieve adsorption, and then introduce hot air treated by heat storage and heat exchange as a reaction regulator to make the adsorbed organic matter react with the catalytic units to generate harmless water and carbon dioxide, and achieve desorption, thus circulating. However, there is a crucial problem in the above scheme and the prior art, that is, the coal ball stacking The catalytic units are arranged vertically, and their internal channels are also vertically corresponding. The formed airway is a vertical channel from bottom to top. When VOCs waste gas enters, the waste gas will rise at a faster rate. Although the organic matter in the waste gas will be adsorbed by a large amount by the inner wall of the airway, there is some waste gas that rises rapidly and is discharged without being adsorbed, resulting in substandard waste gas treatment. After the waste gas that does not meet the standards is detected, it is necessary to pass the waste gas that does not meet the standards into the adsorption and desorption system again for treatment. From the overall perspective: the problem is that the efficiency of waste gas treatment is not high. Breaking down the whole and looking at the details: the problem is that the utilization rate of the catalytic unit is not enough, which will induce the problem of waste gas being discharged without adsorption.

[0005] In view of the above problems, the present invention proposes a VOCs treatment system which has high efficiency in catalysis and can prevent the exhaust gas from being discharged substandardly. Summary of the invention

[0006] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology. Specifically, the purpose of the present invention is to provide a VOCs treatment system to solve the problem proposed in the above background technology that since the catalytic units are stacked like coal balls, an airway is formed by corresponding connections between the pores of each catalytic unit. When the exhaust gas passes through, the inner wall of the dense airway will adsorb the organic matter in the exhaust gas to achieve adsorption, and then the air treated by heat storage and heat exchange is introduced as a reaction regulator to make the adsorbed organic matter react with the catalytic unit to generate harmless water and carbon dioxide, and achieve desorption, thereby circulating. However, there is a crucial problem in the above scheme and the existing technology, that is, the catalytic units stacked like coal balls are arranged vertically, and their internal pores are also vertically corresponding. The formed airway is a vertical channel from bottom to top. When VOCs exhaust gas enters, the exhaust gas will rise at a faster speed. Although the organic matter will be adsorbed by a large amount by the inner wall of the airway, there is a part of the exhaust gas that rises rapidly and is discharged without being adsorbed, resulting in the problem that the exhaust gas treatment does not meet the standards.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a VOCs treatment system, comprising a base plate, vertical rods are symmetrically fixed on the upper surface of the base plate, and a top plate is fixed on the upper end of the vertical rods, a central axis is installed between the top plate and the bottom plate, and a spiral shell is symmetrically fixed to the outer wall of the central axis, circular ring connecting ends are fixed to the upper and lower ends of the spiral shell, and the lower end of the central axis is connected to a lower fixed plate, and an upper fixed plate is sleeved on the outer wall of the upper end of the central axis, an exhaust gas inlet and an air inlet that are symmetrically installed at the lower end of the lower fixed plate and are fitted with the lower ends of the two circular ring connecting ends, and an adsorption gas exhaust pipe and a desorption gas exhaust pipe that can be adaptively retracted are symmetrically installed at the upper end of the upper fixed plate, and a control component is installed between the top plate and the bottom plate.

[0008] Preferably, the upper end of the central axis is connected to a stepping motor mounted on the surface, and both the adsorption gas exhaust pipe and the desorption gas exhaust pipe are fixedly connected to the top plate in a through-type manner.

[0009] Preferably, the interiors of the lower fixing plate and the upper fixing plate are symmetrically provided with through grooves corresponding to the circular connecting ends, and the lower surfaces of the lower fixing plate and the upper fixing plate are respectively fitted and connected to the outer edges of the corresponding circular connecting ends.

[0010] Preferably, adaptive rotation connection components are installed between the two circular connection ends at the upper and lower ends of the spiral shell and the lower fixed disk and the upper fixed disk, and the adaptive rotation connection components include a convex ball and an annular ball groove.

[0011] Preferably, an annular ball groove is provided inside the lower fixed plate and the upper fixed plate, and a spherical end of a convex ball is slidably provided inside the annular ball groove, and the other end of the convex ball is fixedly connected to the circular ring connecting end.

[0012] Preferably, telescopic pipes are slidably arranged inside the adsorption gas exhaust pipe and the desorption gas exhaust pipe, and the lower ends of the two telescopic pipes are symmetrically connected to the upper fixed plate, and sliders are symmetrically fixed to the upper ends of the telescopic pipes, and the inner walls of the adsorption gas exhaust pipe and the desorption gas exhaust pipe are symmetrically provided with sliding grooves, and the two sliders are slidably arranged inside the two sliding grooves, respectively.

[0013] Preferably, the lower fixed plate and the upper fixed plate are symmetrically arranged about the central axis of the spiral shell, and the exhaust gas inlet and the air inlet are both fixedly connected to the bottom plate.

[0014] Preferably, the control component includes a controller, an electric telescopic rod and a VOCs concentration detection sensor, and the controller is fixedly installed on the upper surface of the top plate, the base of the electric telescopic rod is fixed on the lower surface of the top plate, and the telescopic end of the electric telescopic rod is fixed to the upper surface of the upper fixed plate, and the VOCs concentration detection sensor is fixedly installed on the inner wall of the telescopic pipe corresponding to the inside of the adsorbed gas exhaust pipe, and the electric telescopic rod and the VOCs concentration detection sensor are both electrically connected to the controller.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] First, the exhaust gas is injected into the lower end of the left spiral shell through the exhaust gas inlet. At this time, the two spiral shells are in the maximum extension state, and coal ball-shaped catalyst units are placed inside the spiral shells in sequence. When the exhaust gas enters the spiral shells, it will pass through the channels inside the catalyst units arranged in a spiral sequence, changing from the traditional vertical ascent method to the spiral ascent method, thereby increasing the contact area between the exhaust gas and the channel when entering the channel and increasing the retention time of the exhaust gas in the channel, further improving the adsorption effect of the catalyst unit on organic matter in the exhaust gas.

[0017] Since the exhaust gas is directly introduced into the spiral shell after the energy storage high heat treatment, there are differences in the pressure of the exhaust gas introduced per unit time. The VOCs concentration detection sensor is located inside the corresponding circular connection end. Since the pressure of the exhaust gas introduced per unit time is different, the rate at which the exhaust gas spirals up inside the spiral shell is also different. The exhaust gas with a larger initial pressure will climb faster, and when it reaches the inside of the circular connection end, it will be sensed by the VOCs concentration detection sensor first. When the VOCs concentration detection sensor detects that there is still a certain concentration of VOCs in the exhausted exhaust gas, it means that the adsorption efficiency of the catalytic unit inside the spiral shell is low and needs to be improved. At this time, the VOCs concentration detection sensor starts the electric telescopic rod through the controller, and the electric telescopic rod begins to extend and push down the upper fixed plate, so that The upper fixed plate drives the two symmetrical telescopic pipes at the upper end to fall synchronously. At the same time, the upper fixed plate will produce a downward squeezing effect on the upper ends of the two spiral shells, so that the two spiral shells together with the internal catalytic units are gradually compressed. At this time, the spiral amplitude of the spiral shell increases, and the rising speed of the exhaust gas inside the spiral shell is reduced again, and the contact time with the inner wall of the channel is increased again, thereby further improving the adsorption efficiency of the catalytic unit. At the same time, when the VOCs concentration of the exhausted exhaust gas is low to the qualified range, the spiral shell begins to reset to the initial state (therefore, if the exhausted exhaust gas is qualified, then such a large spiral amplitude is not required, but a smaller spiral amplitude is required to allow the adsorbed exhaust gas to be discharged faster), thereby always maintaining the catalytic unit inside the spiral shell with a high-efficiency adsorption effect.

[0018] Subsequently, the stepper motor starts regularly to drive the two spiral shells and the upper and lower circular connecting ends to rotate through the central axis, so that the spiral shell that originally passed exhaust gas for adsorption becomes the one that passes hot air for desorption, and the other spiral shell that originally passed hot air for desorption becomes the one that passes exhaust gas for adsorption. This cycle ensures the uninterrupted output of exhaust gas and air and the separation of adsorption and desorption processes, thereby achieving an orderly arrangement of the exhaust gas and hot air in and out to avoid mutual influence. At the same time, the structure is simple and the exhaust gas treatment effect is high, which is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention in the initial state;

[0020] Figure 2 It is a schematic diagram of the front cross-sectional structure of the spiral shell after being compressed;

[0021] Figure 3 For the present invention Figure 1 An enlarged schematic diagram of the telescopic mechanism;

[0022] Figure 4 It is a schematic diagram of the top view of the upper fixed plate of the present invention;

[0023] Figure 5 It is a bottom view structural schematic diagram of the upper fixed plate of the present invention;

[0024] Figure 6 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0025] Figure 7 For the present invention Figure 3 Enlarged structural diagram at B in the middle.

[0026] In the figure: 1. bottom plate; 11. vertical rod; 12. top plate; 13. exhaust gas inlet; 14. air inlet; 2. central axis; 21. stepper motor; 3. spiral shell; 31. circular ring connecting end; 32. convex ball; 4. lower fixed plate; 5. upper fixed plate; 51. through groove; 52. annular ball groove; 6. adsorption gas exhaust pipe; 7. desorption gas exhaust pipe; 8. telescopic pipe; 81. slide groove; 82. slider; 9. controller; 91. electric telescopic rod; 92. VOCs concentration detection sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-7 The present invention provides a technical solution: a VOCs treatment system, comprising a bottom plate 1, a vertical rod 11 is symmetrically fixed on the upper surface of the bottom plate 1, and a top plate 12 is fixed on the upper end of the vertical rod 11, a central axis 2 is installed between the top plate 12 and the bottom plate 1, and a spiral shell 3 is symmetrically fixed to the outer wall of the central axis 2, an annular connecting end 31 is fixed to the upper and lower ends of the spiral shell 3, and a lower fixed plate 4 is connected to the lower end of the central axis 2, and an upper fixed plate 5 is sleeved on the outer wall of the upper end of the central axis 2, an exhaust gas inlet 13 and an air inlet 14 that are in contact with the lower ends of the two annular connecting ends 31 are symmetrically installed on the lower end of the lower fixed plate 4, and an adaptively retractable adsorption gas exhaust pipe 6 and a desorption gas exhaust pipe 7 are symmetrically installed on the upper end of the upper fixed plate 5, and a control component is installed between the top plate 12 and the bottom plate 1.

[0029] The upper end of the central shaft 2 is connected to a stepping motor 21 mounted on the surface, and the adsorption gas exhaust pipe 6 and the desorption gas exhaust pipe 7 are both fixedly connected to the top plate 12 in a through-type manner.

[0030] The lower fixing plate 4 and the upper fixing plate 5 are symmetrically provided with through grooves 51 corresponding to the circular connecting end 31 , and the lower surfaces of the lower fixing plate 4 and the upper fixing plate 5 are respectively fitted and connected to the outer edges of the corresponding circular connecting end 31 .

[0031] Adaptive rotation connection components are installed between the two annular connection ends 31 at the upper and lower ends of the spiral shell 3 and the lower fixed plate 4 and the upper fixed plate 5 , and the adaptive rotation connection components include a convex ball 32 and an annular ball groove 52 .

[0032] An annular ball groove 52 is formed inside the lower fixing plate 4 and the upper fixing plate 5 . The spherical end of the convex ball 32 is slidably arranged inside the annular ball groove 52 , and the other end of the convex ball 32 is fixedly connected to the annular connecting end 31 .

[0033] Telescopic pipes 8 are slidably arranged inside the adsorption gas discharge pipe 6 and the desorption gas discharge pipe 7, and the lower ends of the two telescopic pipes 8 are symmetrically connected to the upper fixed plate 5, and sliders 82 are symmetrically fixed to the upper ends of the telescopic pipes 8. Slide grooves 81 are symmetrically opened on the inner walls of the adsorption gas discharge pipe 6 and the desorption gas discharge pipe 7, and two sliders 82 are slidably arranged inside the two slide grooves 81, respectively.

[0034] The lower fixing plate 4 and the upper fixing plate 5 are symmetrically arranged with respect to the central axis of the spiral housing 3 , and the exhaust gas inlet 13 and the air inlet 14 are both fixedly connected to the bottom plate 1 .

[0035] The control component includes a controller 9, an electric telescopic rod 91 and a VOCs concentration detection sensor 92, and the controller 9 is fixedly installed on the upper surface of the top plate 12, the base of the electric telescopic rod 91 is fixed on the lower surface of the top plate 12, and the telescopic end of the electric telescopic rod 91 is fixed to the upper surface of the upper fixed plate 5, and the VOCs concentration detection sensor 92 is fixedly installed on the inner wall of the telescopic pipe 8 corresponding to the inside of the adsorption gas exhaust pipe 6, and the electric telescopic rod 91 and the VOCs concentration detection sensor 92 are both electrically connected to the controller 9.

[0036] Working principle: When using the VOCs treatment system, first, Figure 1 As shown, the exhaust gas is injected into the lower end of the left spiral shell 3 through the exhaust gas inlet 13. At this time, the two spiral shells 3 are in the maximum extension state. Coal ball-shaped catalytic units are placed in sequence inside the spiral shell 3, and the catalytic units need to be polished and chamfered when placed in the spiral shell 3. At the same time, an elastic honeycomb-shaped breathable material is placed between two adjacent catalytic units to provide the conditions required for compression of the spiral shell 3. When the exhaust gas enters the spiral shell 3, it will pass through the channels inside the catalytic units arranged in sequence in a spiral manner, changing from a traditional vertical ascending method to a spiral ascending method, thereby increasing the contact area between the exhaust gas and the channel when entering the channel and increasing the residence time of the exhaust gas in the channel, further improving the adsorption effect of the catalytic unit on organic matter in the exhaust gas.

[0037] Since the exhaust gas is directly introduced into the spiral shell 3 after the energy storage high heat treatment, the pressure of the exhaust gas introduced per unit time varies, such as Figure 3As shown, the VOCs concentration detection sensor 92 is located inside the corresponding circular connecting end 31. Due to the difference in the pressure of the exhaust gas introduced per unit time, the rate at which the exhaust gas spirally rises inside the spiral shell 3 is also different. The exhaust gas with a larger initial pressure will climb faster. When it reaches the inside of the circular connecting end 31, it will be first sensed by the VOCs concentration detection sensor 92. When the VOCs concentration detection sensor 92 detects that there is still a certain concentration of VOCs in the exhausted exhaust gas (low concentration of VOCs mixed in the air is harmless to the human body and the environment, and only when the concentration reaches a certain level, it is considered a harmful gas), it means that the adsorption efficiency of the catalytic unit inside the spiral shell 3 is low and needs to be improved. At this time, the VOCs concentration detection sensor 92 starts the electric telescopic rod 91 through the controller 9, and the electric telescopic rod 91 begins to extend and push down the upper fixed plate 5, so that the upper fixed plate 5 drives the two symmetrical telescopic pipes 8 at the upper end to fall synchronously. At the same time, the upper fixed plate 5 will produce a downward squeezing effect on the upper ends of the two spiral shells 3, so that the two spiral shells 3 together with the internal catalytic units are gradually compressed to Figure 2 In the state shown, the spiral amplitude of the spiral shell 3 is increased, the rising speed of the exhaust gas in the spiral shell 3 is reduced again, and the contact time with the inner wall of the channel is increased again, thereby further improving the adsorption efficiency of the catalytic unit. At the same time, when the VOCs concentration of the exhausted gas is lower than the qualified range, the spiral shell 3 begins to reset to the initial state (therefore, if the exhausted exhaust gas is qualified, then such a large spiral amplitude is not required, but a smaller spiral amplitude is required to allow the exhaust gas that has been adsorbed to be discharged faster), thereby always maintaining the catalytic unit inside the spiral shell 3 always has a high-efficiency adsorption effect.

[0038] Subsequently, the stepper motor 21 starts at a fixed time and drives the two spiral shells 3 and the circular connecting ends 31 at the upper and lower ends to rotate 180 degrees through the central axis 2, so that the spiral shell 3 that originally passed exhaust gas for adsorption becomes the one that passes hot air for desorption, while the other spiral shell 3 that originally passed hot air for desorption becomes the one that passes exhaust gas for adsorption. This cycle ensures the uninterrupted output of exhaust gas and air and the separation of adsorption and desorption processes, thereby achieving an orderly arrangement of the exhaust gas and hot air in and out to avoid mutual influence. At the same time, the structure is simple and the exhaust gas treatment effect is high, which is suitable for popularization and use.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A VOCs treatment system, comprising a base plate (1), characterized in that: A vertical rod (11) is symmetrically fixed to the upper surface of the bottom plate (1), and a top plate (12) is fixed to the upper end of the vertical rod (11), a central axis (2) is installed between the top plate (12) and the bottom plate (1), and a spiral shell (3) is symmetrically fixed to the outer wall of the central axis (2), an annular connecting end (31) is fixed to the upper and lower ends of the spiral shell (3), and the lower end of the central axis (2) is connected to a lower fixed plate (4), and an upper fixed plate (5) is sleeved on the outer wall of the upper end of the central axis (2), an exhaust gas inlet (13) and an air inlet (14) that are in contact with the lower ends of the two annular connecting ends (31) are symmetrically installed at the lower end of the lower fixed plate (4), and an adaptively retractable adsorption gas discharge pipeline (6) and a desorption gas discharge pipeline (7) are symmetrically installed at the upper end of the upper fixed plate (5), and a control component is installed between the top plate (12) and the bottom plate (1); Coal-brick-shaped catalytic units are placed in sequence inside the spiral shell (3); The upper end of the central shaft (2) is connected to a stepping motor (21) mounted on the surface, and the adsorption gas discharge pipeline (6) and the desorption gas discharge pipeline (7) are both fixedly connected to the top plate (12) in a through-type manner, and the spiral shell (3) is made of a high-temperature resistant elastic material; An adaptive rotation connection assembly is installed between the two annular connection ends (31) at the upper and lower ends of the spiral shell (3) and the lower fixed disk (4) and the upper fixed disk (5), and the adaptive rotation connection assembly includes a convex ball (32) and an annular ball groove (52); The lower fixed plate (4) and the upper fixed plate (5) are provided with an annular ball groove (52) inside, the spherical end of the convex ball (32) is slidably arranged in a snap-fitting manner inside the annular ball groove (52), and the other end of the convex ball (32) is fixedly connected to the circular ring connecting end (31); The control assembly comprises a controller (9), an electric telescopic rod (91) and a VOCs concentration detection sensor (92), and the controller (9) is fixedly mounted on the upper surface of the top plate (12), the base of the electric telescopic rod (91) is fixedly mounted on the lower surface of the top plate (12), the telescopic end of the electric telescopic rod (91) is fixedly mounted on the upper surface of the upper fixed plate (5), and the VOCs concentration detection sensor (92) is fixedly mounted on the inner wall of the corresponding telescopic pipe (8) inside the adsorbed gas discharge pipe (6), and the electric telescopic rod (91) and the VOCs concentration detection sensor (92) are both electrically connected to the controller (9); When the VOCs concentration detection sensor (92) detects a certain concentration of VOCs, the VOCs concentration detection sensor (92) activates the electric telescopic rod (91), and the electric telescopic rod (91) pushes down the upper fixed plate (5), so that the upper fixed plate (5) drives the two telescopic pipes (8) to fall down, and at the same time, the upper fixed plate (5) presses the two spiral shells (3) downward, so that the catalytic units inside the two spiral shells (3) are gradually compressed, so that the spiral amplitude of the spiral shells (3) increases.

2. A VOCs treatment system according to claim 1, characterized in that: The lower fixing plate (4) and the upper fixing plate (5) are both symmetrically provided with through grooves (51) corresponding to the circular connecting ends (31), and the lower surfaces of the lower fixing plate (4) and the upper fixing plate (5) are respectively fitted and connected to the outer edges of the corresponding circular connecting ends (31).

3. A VOCs treatment system according to claim 1, characterized in that: Telescopic pipes (8) are slidably arranged inside the adsorption gas discharge pipe (6) and the desorption gas discharge pipe (7), and the lower ends of the two telescopic pipes (8) are symmetrically connected to the upper fixed plate (5), and sliders (82) are symmetrically fixed to the upper ends of the telescopic pipes (8), and the inner walls of the adsorption gas discharge pipe (6) and the desorption gas discharge pipe (7) are symmetrically provided with sliding grooves (81), and the two sliders (82) are slidably arranged inside the two sliding grooves (81), respectively.

4. A VOCs treatment system according to claim 1, characterized in that: The lower fixed plate (4) and the upper fixed plate (5) are symmetrically arranged about the central axis of the spiral shell (3), and the exhaust gas inlet (13) and the air inlet (14) are both fixedly connected to the bottom plate (1).

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