Environment-friendly filter for VOCs waste gas treatment

Abstract

The invention relates to the field of waste gas purification treatment, and discloses an environment-friendly VOCs waste gas treatment filter which comprises a rotating cylinder, sealing plates are installed at the two ends of the rotating cylinder, a gas inlet is formed in one of the two sealing plates, a gas outlet is formed in the other sealing plate, and a filtering assembly is arranged in the rotating cylinder. The vertical section of the filtering assembly is in a circular ring shape, the filtering assembly comprises a plurality of filtering boxes, activated carbon is arranged in the filtering boxes, a set distance is formed between the outer wall of each filtering box and the inner wall of the rotating cylinder, the two ends of each filtering box are detachably connected with the sealing plates, and the multiple filtering boxes are annularly arranged and define a waste gas channel; a plurality of cooling boxes are arranged in the waste gas channel, one face of each cooling box is attached to the filtering box, and a control mechanism used for controlling the rotating cylinder to rotate and a driving mechanism used for driving the cooling boxes to move horizontally are arranged outside the rotating cylinder. The activated carbon filtering box can be cooled in time, and the adsorption capacity of activated carbon is kept.

Description

Technical Field

[0001] This invention relates to the field of air pollution control technology, and in particular to an environmentally friendly filter for treating VOCs waste gas. Background Technology

[0002] Volatile organic compounds (VOCs) are organic compounds that have a high saturated vapor pressure (greater than 13.33 Pa), low boiling point, and small molecular weight under standard conditions, and are easily volatilized at room temperature. They are commonly referred to as VOCs or VOCs. VOCs do not refer to a specific pollutant, but rather to a collective term for a class of organic compounds with similar physicochemical properties. VOCs are generally classified into several categories, including non-methane hydrocarbons, oxygenated organic compounds, halogenated hydrocarbons, nitrogen-containing organic compounds, and sulfur-containing organic compounds. VOCs participate in the formation of ozone and secondary aerosols in the atmosphere, and have a significant impact on regional ozone pollution and PM2.5 pollution.

[0003] Activated carbon air filters are devices that remove pollutants from the air using activated carbon adsorption technology. They are primarily used to adsorb VOCs from exhaust gases. The principle of activated carbon adsorption is mainly based on van der Waals forces, which adsorb pollutant molecules onto the pore surface of the activated carbon. If the industrial exhaust gas being treated typically has a high temperature, the heat transferred to the activated carbon will gradually accumulate. When the activated carbon temperature rises from 20℃ to 50℃, the adsorption capacity for VOCs decreases by 30%-50%. This is because higher temperatures intensify molecular motion, making it easier for adsorbed molecules to detach from the activated carbon surface. Furthermore, higher-temperature exhaust gases usually rise and preferentially contact the activated carbon located at the top, making the activated carbon at the top more prone to saturation and deactivation.

[0004] The invention patent with publication number CN118663027B discloses a highly efficient and environmentally friendly activated carbon waste gas treatment and purification device that sprays water to cool the waste gas and prevent it from becoming too hot. However, in the waste gas treatment industry, the suitable working humidity for activated carbon is no more than 70%. Directly spraying water to cool the waste gas will significantly increase the humidity of the waste gas and reduce the service life of the activated carbon. Summary of the Invention

[0005] The purpose of this invention is to provide an environmentally friendly filter for VOCs waste gas treatment, which aims to solve the problems in the prior art where the heat accumulation of activated carbon leads to an increase in temperature, affecting the adsorption capacity, and the activated carbon located at the top is prone to adsorption saturation and failure.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: An environmentally friendly VOCs waste gas treatment filter includes a rotating cylinder with sealing plates installed at both ends. One of the sealing plates has an air inlet, and the other has an air outlet. A filter assembly is installed inside the rotating cylinder. The vertical cross-section of the filter assembly is annular, and the axis of the filter assembly is coaxial with the axis of the rotating cylinder. The filter assembly includes multiple filter boxes, each containing activated carbon. The outer wall of each filter box is at a predetermined distance from the inner wall of the rotating cylinder. Both ends of each filter box are detachably connected to the sealing plates. The multiple filter boxes are arranged in a ring and enclose an exhaust gas channel. Multiple cooling boxes are installed inside the exhaust gas channel, each containing refrigerant. One side of each cooling box is in contact with the filter box. A control mechanism for controlling the rotation of the rotating cylinder is installed on the outside of the rotating cylinder, and a drive mechanism for driving the cooling boxes to move horizontally is also installed on one side of the rotating cylinder.

[0007] Through the above technical solution, the exhaust gas enters the exhaust gas channel through the inlet, and after being purified by the activated carbon in the upper and lower filter boxes, it enters the gap between the filter box and the rotating cylinder, and then exits from the outlet of the sealing plate. When the activated carbon in the upper and lower filter boxes accumulates heat and the temperature rises, the control mechanism controls the rotating cylinder and filter components to rotate 90 degrees. The heated filter box comes into contact with the cooling box for heat exchange and cooling. The other two filter boxes rotate to the upper and lower positions of the rotating cylinder to purify and filter the exhaust gas. After a period of time, they rotate 90 degrees again. The filter box that was previously located at the bottom rotates 180 degrees and is now located at the top. All the filter boxes are rotated to the top in sequence for filtration and purification. Therefore, the contact time between each filter box and the exhaust gas is approximately equal, and there is no problem of a certain position easily becoming saturated and failing.

[0008] A further configuration of the present invention is as follows: four filter boxes are provided, and two cooling boxes are provided, with the two cooling boxes arranged opposite each other in a "()" shape.

[0009] With the above technical solution, since the exhaust gas has a high temperature and is easy to rise, two cooling boxes are set on the left and right sides to cool the filter box, and the filter box below the upper box is used to filter and purify the gas.

[0010] A further provision of the present invention is that: a collection box is provided at the bottom of the cooling box, a drain pipe is provided at one end of the collection box, and the outlet end of the drain pipe is located outside the rotating cylinder.

[0011] Through the above technical solution, although the exhaust gas is dried, it still contains some moisture. When the moisture comes into contact with the cooling box at a lower temperature, it easily forms condensate on the surface of the cooling box. The condensate flows down the outer wall of the cooling box into the collection box and is discharged from the drain pipe.

[0012] A further configuration of the present invention is that the drain pipe includes a liquid seal portion, the liquid seal portion being U-shaped, the top of the liquid seal portion being lower than the bottom of the collection box, and the bottom of the liquid seal portion being higher than the outlet end of the drain pipe.

[0013] With the above technical solution, when the condensate is discharged, some of the condensate will remain in the liquid seal section, forming a liquid seal effect on the drain pipe and preventing exhaust gas from being discharged along the drain pipe.

[0014] A further provision of the present invention is that the control mechanism includes a motor, the motor is provided with a gear, and the outer wall of the rotating cylinder is provided with an external gear ring that cooperates with the gear.

[0015] Through the above technical solution, the motor drives the gear to rotate, the gear drives the outer gear ring to rotate, and the outer gear ring drives the rotating cylinder and the filter box to rotate.

[0016] A further configuration of the present invention is as follows: the driving mechanism includes a fixed circular tube, the axis of which is coaxial with the axis of the rotating cylinder; one end of the fixed circular tube passes through the sealing plate and extends into the interior of the rotating cylinder; a driving rod is disposed inside the fixed circular tube; a cylinder is disposed at one end of the driving rod; the driving rod includes multiple frustum portions and cylindrical portions, the frustum portions and the cylindrical portions are coaxial, and the maximum outer diameter of the frustum portions is equal to the outer diameter of the cylindrical portions; a connecting rod is disposed on the side of the cooling box near the fixed circular tube; a connecting pipe is radially disposed on the outer wall of the fixed circular tube, the connecting pipe communicating with the fixed circular tube; one end of the connecting rod passes through the connecting pipe and abuts against the outer wall of the frustum portion; a spring is sleeved on the connecting rod.

[0017] With the above technical solution, when the rotating cylinder and the filter box rotate, in order to prevent friction between the surface of the cooling box and the filter box, the cylinder controls the drive rod to retract, the connecting rod slides back on the frustum, the cooling box moves in the direction of the drive rod and disengages from the filter box. After the rotating cylinder and the filter box have finished rotating, the cylinder controls the drive rod to move forward, the cooling box re-fits the surface of the filter box, and the filter box is cooled and heat exchanged. The spring allows the end of the connecting rod to always keep in contact with the surface of the drive rod.

[0018] A further feature of the present invention is that the end of the connecting rod is a smooth spherical surface, and the outer diameter of the connecting rod is equal to the inner diameter of the connecting pipe.

[0019] With the above technical solution, the sliding friction between the end of the connecting rod and the frustum is reduced, and the connecting rod can only move radially, preventing the connecting rod from shaking.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention, by setting a cooling box and a rotatable filter assembly, when the temperature of the filter box rises, the filter assembly rotates, rotating the filter box with a higher temperature to the side closer to the cooling box. The cooling box cools down the filter box. The cooling box is in contact with the surface of the filter box, which can both exchange heat and prevent gas from entering the filter box and causing the temperature to rise further. 2. Due to the rotation of the filter components, each filter box can rotate to the top in sequence to filter and purify the exhaust gas. The contact time between each filter box and the exhaust gas is approximately the same, so there will be no problem of a filter box in a certain position being saturated and failing due to excessive contact time. This increases the maintenance cycle of the equipment, reduces the number of maintenance times, and improves work efficiency. 3. By setting up a cooling box and a collection box, the present invention can also condense and collect the residual water vapor in the exhaust gas and discharge it to the outside in a timely manner, thereby reducing the water vapor absorbed by the activated carbon and extending the working life of the activated carbon. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the rotating cylinder and control mechanism in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the rotating cylinder and the fixed cylindrical tube in one embodiment of the present invention; Figure 4 This is a cross-sectional view of an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the filter assembly and cooling box in one embodiment of the present invention; Figure 6 This is a schematic diagram of the collection box and drain pipe structure in one embodiment of the present invention; Figure 7 This is a cross-sectional view from another perspective of an embodiment of the present invention; Figure 8 This is a schematic diagram of the cooling box and fixed circular tube in one embodiment of the present invention; Figure 9 This is a schematic diagram of the cooling box and drive rod in one embodiment of the present invention.

[0023] Figure descriptions: 1. Rotating cylinder; 1a. Sealing plate; 1a1. Air inlet; 1a2. Air outlet; 2. Filter assembly; 2a. Filter box; 2b. Exhaust gas passage; 3. Cooling box; 3a. Collection box; 3b. Drain pipe; 3b1. Liquid seal section; 4. Control mechanism; 4a. Motor; 4b. Gear; 4c. External gear ring; 5. Drive mechanism; 5a. Fixed circular tube; 5b. Drive rod; 5b1. Frustum section; 5b2. Cylindrical section; 5c. Cylinder; 5d. Connecting rod; 5e. Connecting pipe; 5f. Spring; 6. Cyclone tower; 7. Dry filter; 8. Dryer. Detailed Implementation

[0024] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] This invention provides an environmentally friendly filter for treating VOCs waste gas, such as... Figures 1 to 3 As shown, the device includes a rotating cylinder 1 with its axis oriented horizontally. A sealing plate 1a is installed at each end of the rotating cylinder 1. One sealing plate 1a has an air inlet 1a1, which is circular and whose axis is coaxial with the axis of the rotating cylinder 1. The air inlet 1a1 is used to connect to an exhaust gas conveying pipe. The other sealing plate 1a has multiple air outlets 1a2. A control mechanism 4 is installed on one side of the rotating cylinder 1 to control its rotation. The control mechanism 4 includes a motor 4a with a gear 4b coaxially connected to the output shaft of the motor 4a. An external gear ring 4c, which meshes with the gear 4b, is installed on the outer wall of the rotating cylinder 1. The axis of the external gear ring 4c is coaxial with the axis of the rotating cylinder 1, and the external gear ring 4c is fixedly connected to the outer wall of the rotating cylinder 1. The gear 4b meshes with the external gear ring 4c.

[0026] like Figure 4 and Figure 5As shown, a filter assembly 2 is installed inside the rotating cylinder 1. The vertical cross-section of the filter assembly 2 is annular, and the axis of the filter assembly 2 is coaxial with the axis of the rotating cylinder 1. The filter assembly 2 includes four filter boxes 2a. The two ends of the filter boxes 2a are detachably connected to two sealing plates 1a, preferably by bolts. The filter assembly 2 can rotate with the rotating cylinder 1. Activated carbon is installed inside the filter boxes 2a for filtering and purifying the gas. The vertical cross-section of the filter boxes 2a is fan-shaped and the curvature of the arc surface is equal to 0.5π. The four filter boxes 2a are arranged in a ring, forming an exhaust gas channel 2b in the middle. There is a certain space between the outer side of the filter box 2a and the inner wall of the rotating cylinder 1. The filtered air enters the space between the filter box 2a and the rotating cylinder 1, and then is discharged from the outlet 1a2.

[0027] The filter box 2a has two curved surfaces and four side planes. The side planes at both ends are mounting plates for connecting with the sealing plate 1a. There are multiple filter holes on the two curved surfaces for gas to pass through. Either of the other two surfaces is set as a removable loading plate. After removal, activated carbon can be added into the filter box 2a. The filter box 2a is made of stainless steel and the surface is painted for corrosion protection.

[0028] like Figure 4 and Figure 5 As shown, two cooling boxes 3 are arranged opposite each other in the exhaust gas passage 2b. The vertical cross-section of the cooling box 3 is fan-shaped with an arc radius of 0.5π. The two cooling boxes 3 are arranged opposite each other in a "()" shape, with one side of the cooling box 3 in contact with one side of the filter box 2a. The cooling box 3 is made of copper, which has high heat exchange efficiency. A liquid inlet pipe is provided on the lower side of the cooling box 3, and a liquid outlet pipe is provided on the upper side. Liquid refrigerant enters the interior of the cooling box 3 through the liquid inlet pipe, and flows out through the liquid outlet pipe after filling the cooling box 3. Water is preferred as the liquid refrigerant. After the cooling box 3 is in contact with the surface of the filter box 2a, the higher temperature exhaust gas can no longer come into contact with the filter box 2a, avoiding further increase in temperature of the activated carbon inside the filter box 2a. At the same time, since both the filter box 2a and the cooling box 3 are made of metal, the heat inside the filter box 2a will gradually be conducted to the cooling box 3 and absorbed by the liquid refrigerant. The cooling box 3 plays a role in heat exchange and cooling of the filter box 2a.

[0029] like Figure 5 and Figure 6As shown, a collection box 3a is provided at the bottom of the cooling box 3. A drain pipe 3b is connected to the side of the collection box 3a near the air outlet 1a2. The water outlet end of the drain pipe 3b extends outside the rotating cylinder 1. The drain pipe 3b includes a "U"-shaped liquid seal part 3b1. The top of the liquid seal part 3b1 is lower than the bottom of the collection box 3a, and the bottom is higher than the water outlet end of the drain pipe 3b. If the exhaust gas also contains a small amount of water vapor, condensate will form on the surface of the cooling box 3 after encountering the low temperature of the cooling box 3. Then, it will flow along the arc surface into the collection box 3a. The bottom of the collection box 3a can be set as a slope, with the height gradually decreasing from the end near the air inlet 1a1 to the end near the air outlet 1a2. The drain pipe 3b is set at the end near the air outlet 1a2, so that the condensate will gradually converge towards the end of the drain pipe 3b after flowing into the collection box 3a, and then be discharged along the drain pipe 3b. Alternatively, common water pumping equipment can be used to extract the condensate from the collection box 3a. To prevent exhaust gas from overflowing to the outside through the drain pipe 3b, it is necessary to ensure that there is always liquid in the liquid seal section 3b1 to isolate the air. The liquid seal section 3b1 can be made transparent to facilitate real-time observation of the liquid seal status.

[0030] like Figures 7 to 9 As shown, a drive mechanism 5 for driving the cooling box 3 to move horizontally is provided on one side of the rotating cylinder 1. The drive mechanism 5 includes a fixed cylindrical tube 5a, the axis of which is coaxial with the axis of the rotating cylinder 1. One end of the fixed cylindrical tube 5a passes through the sealing plate 1a and extends into the interior of the rotating cylinder 1. A drive rod 5b is provided inside the fixed cylindrical tube 5a, and a cylinder 5c is provided at one end of the drive rod 5b. The drive rod 5b includes multiple frustum portions 5b1 and cylindrical portions 5b2, which are coaxial. The maximum outer diameter of the frustum portion 5b1 is equal to the outer diameter of the cylindrical portion 5b2. Multiple connecting rods 5d are provided on the side of the cooling box 3 near the fixed circular tube 5a. A connecting tube 5e is radially provided on the outer wall of the fixed circular tube 5a. The connecting tube 5e communicates with the fixed circular tube 5a. One end of the connecting rod 5d passes through the connecting tube 5e and abuts against the outer wall of the frustum portion 5b1. The end of the connecting rod 5d is provided with a smooth spherical surface. The outer diameter of the connecting rod 5d is equal to the inner diameter of the connecting tube 5e. A spring 5f is sleeved on the connecting rod 5d.

[0031] The fixed circular tube 5a is rotatably connected to the sealing plate 1a of the rotating cylinder 1. One end of the fixed circular tube 5a located inside the rotating cylinder 1 is sealed to prevent exhaust gas from entering. When the rotating cylinder 1 and the sealing plate 1a rotate, the fixed circular tube 5a does not rotate. The cylinder 5c controls the drive rod 5b to move back and forth, and the connecting rod 5d slides on the frustum 5b1, driving the cooling box 3 to move radially along the fixed circular tube 5a. This can control the cooling box 3 to fit or detach from the filter box 2a, preventing friction between the filter box 2a and the cooling box 3 when the filter box 2a rotates. The water inlet and outlet pipes on the cooling box 3 can also pass through the inside of the fixed circular tube 5a to the outside of the rotating cylinder 1. The spring 5f is sleeved on the connecting rod 5d, connecting the cooling box 3 and the connecting tube 5e at both ends, ensuring that the end of the connecting rod 5d remains in contact with the frustum 5b1.

[0032] The workflow and principle of this technical solution are as follows: After passing through conventional waste gas treatment devices such as cyclone tower 6, dry filter 7 and dryer 8, the main pollutants remaining in the waste gas are VOCs. The humidity of the waste gas after drying can be controlled below 60%. The waste gas enters the waste gas channel 2b from the inlet 1a1. Because the cooling boxes 3 on the left and right sides are attached to the filter boxes 2a on the left and right sides, the waste gas cannot pass through. The waste gas can only pass through the filter boxes 2a above and below. After being purified by activated carbon filtration in the filter box 2a, the waste gas enters the gap between the rotating cylinder 1 and the filter box 2a, and is discharged from the outlet 1a2 on the sealing plate 1a at the other end.

[0033] After the filter box 2a has been filtering and purifying for a period of time, it accumulates heat and its temperature gradually rises. Then, the cylinder 5c controls the drive rod 5b to move backward, and the connecting rod 5d slides on the frustum 5b1, causing the cooling box 3 to move in the direction of the drive rod 5b. At this time, the cooling box 3 disengages from the filter boxes 2a on the left and right sides. Then, the motor 4a rotates, and through the gear 4b and the external gear ring 4c, it drives the rotating cylinder 1 to rotate 90°. The filter boxes 2a on the left and right sides rotate to the top and bottom respectively. The two filter boxes 2a with higher temperatures previously rotate to the left and right sides. Then, the cylinder 5c controls the drive rod 5b to move forward, and the cooling box 3 comes into contact with the filter boxes 2a with higher temperatures on the left and right sides. This can prevent the exhaust gas from continuing to contact the left and right sides and can also perform heat exchange and cooling. By following the above steps in a cyclical manner, the temperature of filter box 2a can be cooled in a timely manner, ensuring that the activated carbon is at the optimal working temperature. Moreover, each filter box 2a will rotate to the top and bottom in turn for filtration, and the contact time with the exhaust gas is approximately the same. The time for the activated carbon in each filter box 2a to become saturated and fail is also approximately the same. When shutting down for maintenance, the activated carbon in all filter boxes 2a can be replaced at the same time, which effectively reduces the number of maintenance operations and the downtime.

[0034] If the exhaust gas still contains a certain amount of water vapor after being dried by the dryer 8, when it enters the exhaust gas passage 2b, it will encounter the cooler box 3 at a lower temperature. Some of the water vapor will condense on the surface of the cooler box 3 and then flow along the arc surface of the cooler box 3 into the collection box 3a, and then be discharged through the drain pipe 3b. Therefore, the cooler box 3 also plays a role in further reducing the humidity of the exhaust gas, reducing the contact between water vapor and the activated carbon in the filter box 2a, and extending the service life of the activated carbon.

[0035] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0036] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. An environmentally friendly filter for treating VOCs waste gas, characterized in that: The utility model provides a filter device for waste gas, which comprises a rotating cylinder (1), two ends of the rotating cylinder (1) are provided with sealing plates (1a), one of the two sealing plates (1a) is provided with an air inlet (1a1), the other sealing plate (1a) is provided with an air outlet (1a2), a filter assembly (2) is arranged in the rotating cylinder (1), the vertical section of the filter assembly (2) is annular, and the axis of the filter assembly (2) is coaxial with the axis of the rotating cylinder (1), the filter assembly (2) comprises a plurality of filter boxes (2a), the filter boxes (2a) are provided with activated carbon, the outer wall of the filter boxes (2a) and the inner wall of the rotating cylinder (1) have a set distance, the two ends of the filter boxes (2a) are detachably connected with the sealing plates (1a), the plurality of filter boxes (2a) are annularly arranged and enclose a waste gas passage (2b), a plurality of cooling boxes (3) are arranged in the waste gas passage (2b), the cooling boxes (3) are provided with refrigerants, one side of the cooling boxes (3) is attached to the filter boxes (2a), the outside of the rotating cylinder (1) is provided with a control mechanism (4) for controlling the rotation of the rotating cylinder (1), and one side of the rotating cylinder (1) is further provided with a driving mechanism (5) for driving the horizontal movement of the cooling boxes (3).

2. The environmentally friendly VOCs waste gas treatment filter according to claim 1, characterized in that: The filter boxes (2a) are provided with four, the cooling boxes (3) are provided with two, and the two cooling boxes (3) are oppositely arranged in a shape of ''.

3. The environmentally friendly VOCs waste gas treatment filter according to claim 2, characterized in that: The bottom of the cooling box (3) is provided with a collecting box (3a), one end of the collecting box (3a) is provided with a drain pipe (3b), and the water outlet end of the drain pipe (3b) is located outside the rotating cylinder (1).

4. The environmentally friendly VOCs waste gas treatment filter according to claim 3, characterized in that: The drain pipe (3b) comprises a liquid seal part (3b1), the liquid seal part (3b1) is in a shape of ''U'', the top of the liquid seal part (3b1) is lower than the bottom of the collecting box (3a), and the bottom of the liquid seal part (3b1) is higher than the water outlet end of the drain pipe (3b).

5. The environmentally friendly VOCs waste gas treatment filter according to claim 1, characterized in that: The control mechanism (4) comprises a motor (4a), the motor (4a) is provided with a gear (4b), and the outer wall of the rotating cylinder (1) is provided with an outer gear ring (4c) matched with the gear (4b).

6. The environmentally friendly VOCs waste gas treatment filter according to claim 1, characterized in that: The driving mechanism (5) comprises a fixed circular tube (5a), the axis of the fixed circular tube (5a) is coaxial with the axis of the rotating cylinder (1), one end of the fixed circular tube (5a) extends into the interior of the rotating cylinder (1) through the sealing plate (1a), a driving rod (5b) is arranged in the fixed circular tube (5a), one end of the driving rod (5b) is provided with a cylinder (5c), the driving rod (5b) comprises a plurality of circular cone sections (5b1) and a cylindrical section (5b2), the circular cone sections (5b1) are coaxial with the cylindrical section (5b2), and the maximum outer diameter of the circular cone sections (5b1) is equal to the outer diameter of the cylindrical section (5b2), the cooling box (3) is provided with a connecting rod (5d) on the side close to the fixed circular tube (5a), a connecting tube (5e) is radially arranged on the outer wall of the fixed circular tube (5a), the connecting tube (5e) is communicated with the fixed circular tube (5a), one end of the connecting rod (5d) is in abutment with the outer wall of the circular cone section (5b1) through the connecting tube (5e), and a spring (5f) is sleeved on the connecting rod (5d).

7. The environmentally friendly VOCs waste gas treatment filter according to claim 6, characterized in that: The end of the connecting rod (5d) is provided in a smooth spherical surface, and the outer diameter of the connecting rod (5d) is equal to the inner diameter of the connecting tube (5e).

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