A gas-solid separation device and system for VOCs waste gas treatment

Abstract

The present invention discloses a gas-solid separation device and system for treating VOCs waste gas, and relates to the technical field of waste gas treatment devices. The gas-solid separation system comprises a return air duct, a three-way valve, a particle concentration detector, a high-pressure chamber, a pressurized tank connected to the interior of the high-pressure chamber, and an adsorption system. The gas-solid separation device comprises a separation tank body and an arc-shaped duct connected to one end of the separation tank body for air intake, wherein the arc-shaped duct is in a bent structure, and a collecting box is provided at a side wall of the arc-shaped duct close to the outside; the interior of the separation tank body is in a conical structure, and the inner diameter gradually decreases from one side of the separation tank body close to the arc-shaped duct to the other side of the separation tank body to form a conical chamber; a gas-solid separation component is provided inside the separation tank body. The present invention can perform fine filtration on particulate matter of different particle sizes in the waste gas, and at the same time adopts a reflux system to prevent the waste gas that does not meet the treatment standards from entering the subsequent treatment steps to protect the subsequent treatment equipment from wear.

Description

Technical Field

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

[0002] Volatile organic compounds (VOCs) are an important source of air pollutants. They are produced in large quantities during industrial production and have impacts on environmental quality, climate change and human health, such as participating in the formation of photochemical smog, causing increased PM2.5 concentrations, causing or aggravating respiratory diseases, allergic reactions and the risk of certain cancers.

[0003] In the VOCs waste gas treatment process, gas-solid separation aims to remove dust, particulate matter or other solid impurities in the waste gas to protect subsequent processing equipment from wear and blockage and improve the overall purification efficiency.

[0004] Existing gas-solid separation equipment, such as cyclone separators, may face problems when treating VOCs waste gas, such as separation efficiency being greatly affected by the properties of particulate matter (particle size, density, shape, etc.), high energy consumption, easy to cause increased wastewater emissions, and some equipment being sensitive to humidity. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a gas-solid separation device and system for VOCs waste gas treatment, which can perform fine filtration on particulate matter of different particle sizes in the waste gas, and at the same time adopt a reflux system to prevent the waste gas that does not meet the treatment standards from entering the subsequent treatment steps to protect the subsequent treatment equipment from wear.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas-solid separation device for treating VOCs waste gas, comprising a separation tank body and an arc-shaped pipe connected to one end of the separation tank body for air intake, wherein the arc-shaped pipe is a bent structure, and in the arc-shaped pipe, the high-speed airflow causes the particles to be subjected to centrifugal force, and the centrifugal force on the particles with larger mass is relatively strong, and the particles are more likely to deviate from the center line of the airflow and move to the outside of the pipe, and a collection box is provided at the side wall of the arc-shaped pipe near the outside, for collecting the particles with larger mass that deviate from the center line of the airflow;

[0007] The interior of the separation tank body is in a conical structure, and the inner diameter gradually decreases from one side of the separation tank body close to the arc-shaped pipe to the other side of the separation tank body, forming a conical bin. As the inner diameter of the separation tank body gradually decreases from the inlet side to the outlet side, the gas flow channel area decreases and the flow rate increases accordingly. This change causes the gas flow rate to be unevenly distributed in the tank body. The flow rate near the conical wall is relatively low, which is conducive to the deceleration and deposition of particles. In the central area of ​​the cone, the gas flow rate is faster, which is conducive to the rapid discharge of clean gas with fewer separated particles. This flow rate gradient helps to improve the separation efficiency and reduce the risk of re-entrainment of particles.

[0008] A gas-solid separation component is provided inside the separation tank body, and the gas-solid separation component is located in the conical bin. The gas-solid separation component includes an adjusting rod installed at the center line of the conical bin, and the side end of the adjusting rod is connected to the inner wall of the separation tank body through an external component, and a plurality of sieve plates are sleeved on the adjusting rod at intervals, and the plurality of sieve plates are gradually reduced in size from the inlet side to the outlet side of the conical bin, and the sieve hole density on each sieve plate is different, and the sieve plate with a smaller sieve hole density is farther away from the inlet side of the conical bin.

[0009] The present invention provides a gas-solid separation device for treating VOCs waste gas, wherein a sleeve shaft is installed at the center of each sieve plate, and the sleeve shaft can be slidably installed on an adjusting rod.

[0010] The present invention discloses a gas-solid separation device for treating VOCs waste gas, wherein a self-cleaning component is provided at a position corresponding to each sieve plate on the adjusting rod, the self-cleaning component comprises a rotatable cylinder mounted on the adjusting rod, a plurality of grooves are provided on the circumference of the cylinder, the grooves are divided into an upper and lower layer structure, the width of the upper layer is greater than the width of the lower layer, an inverted V-shaped elastic frame is provided on the lower layer of the grooves, and electromagnetic blocks protruding outwards for supporting cleaning strips are provided on both sides of the inner wall of the upper layer of the grooves, and the cleaning strips are capable of being adsorbed. The sieve plate is provided with a limiting ring with a diameter larger than that of the sleeve shaft and forms an annular slide rail with the sleeve shaft; a slide seat which is consistent with the position and number of the trough body is provided inside the annular slide rail; the slide seat is connected to the outer wall of the sleeve shaft and can be slidably arranged in the annular slide rail; a lifting plate is provided between the slide seat and the corresponding trough body; one side of the lifting plate is hinged on the slide seat; a push rod for squeezing one side of the elastic frame is provided directly below the lifting plate near the slide seat; a gas rod for squeezing this side of the elastic frame is installed on the trough body on the other side of the elastic frame.

[0011] The present invention discloses a gas-solid separation device for treating VOCs waste gas, wherein a plurality of sliding rods are inserted into the cylinder near the inlet side of the conical bin, one end of the sliding rod extends to the outside of the cylinder near the inlet side of the conical bin, and the other end of the sliding rod penetrates the sleeve shafts of all sieve plates on the adjusting rod and the cylinder, so that when the outermost cylinder near the conical bin rotates, the other cylinders play a synergistic role and rotate with the outermost cylinder.

[0012] The present invention discloses a gas-solid separation device for treating VOCs waste gas, wherein the outer part of the cylinder body of the sliding rod located at the inlet side of the conical bin is sleeved with a first transmission wheel, the adjusting rod is provided with a diverter hood with a conical structure, a motor gear I for driving the first rotating wheel is installed in the diverter hood, a rotatable roller is installed on the inner shaft rod inside the adjusting rod located at the inlet side of the conical bin, a second transmission wheel is installed on the roller, and a motor gear II for driving the first rotating wheel is installed in the diverter hood, the inner thread of the adjusting rod is matched with the inner shaft rod, and the adjusting rod is located at the sieve plate near the inlet side of the conical bin and has a hollow structure design, a push plate protruding from the outside of the adjusting rod is provided at the end of the inner shaft rod located at this position, and when the motor gear II drives the second transmission gear to rotate, the end of the inner shaft rod gradually moves toward the nearest sieve plate due to the thread matching until the push plate presses against the sieve plate and moves toward the cylinder body.

[0013] The present invention discloses a gas-solid separation device for treating VOCs waste gas, wherein the cleaning strip is made of a flexible magnetic material and has a fitting groove at its bottom. When the sieve plate moves toward the cylinder body, a lifting plate is inserted into the groove body below the cleaning strip. At the same time, due to the squeezing effect of the gas rod and the push rod, the elastic frame gradually rises in the groove body, so that the center of the elastic frame lifts up the bottom of the lifting plate, so that when the lifting plate is embedded in the fitting groove at the bottom of the cleaning strip, the upper surface of the cleaning strip gradually fits with the sieve plate.

[0014] The present invention discloses a gas-solid separation device for treating VOCs waste gas, wherein the sieve plate is a trumpet-shaped structure with an inner diameter gradually decreasing from the inlet side of the conical bin to the outlet side, which can efficiently filter particulate matter in the airflow while facilitating the lifting plate to fit the surface thereof. After fitting, the motor gear I drives the first motor gear to rotate, and the slide seat on each sieve plate slides in the annular slide rail due to the driving of the slide rod, so that the cleaning strips on each sieve plate rotate and clean the surface of the sieve plate under the action of the lifting plate.

[0015] The present invention discloses a gas-solid separation system for treating VOCs waste gas, comprising a return air pipeline, wherein the return air pipeline is connected to the exhaust port of a separation tank body, and a three-way valve and a particle concentration detector are installed on the return air pipeline. When the particle concentration detector detects that the treated waste gas does not meet the standard, the waste gas to be treated for a second time is returned to the separation tank body through the return air pipeline connected to the three-way valve; when the particle concentration detector detects that the treated waste gas meets the standard, the waste gas is transferred to a subsequent treatment device through another pipeline connected to the three-way valve for re-treatment.

[0016] The present invention discloses a gas-solid separation system for treating VOCs waste gas, which comprises a high-pressure chamber installed between a separation tank body and an arc-shaped pipe and a pressurized tank connected to the interior of the high-pressure chamber. The high-pressure chamber is connected to the pressurized tank so that waste gas is filled into the pressurized tank. When the air pressure valve in the pressurized tank is opened, the gas in the pressurized tank enters the high-pressure chamber, increasing the pressure in the high-pressure chamber. After the valve controlling the high-pressure chamber is opened, the airflow will accelerate through the interior of the separation tank body, thereby increasing the separation efficiency.

[0017] The present invention discloses a gas-solid separation system for treating VOCs waste gas, wherein an adsorption system is installed on a separation tank body, the adsorption system is installed with a fan and a particle discharge pipe for adsorbing the inside of the separation tank body, the particle discharge pipe is connected to the inside of the separation tank body through a dust suction pipe, and each of the dust suction pipes is arranged at intervals in a spacing interval formed by two sieve plates located in the separation tank body, so that the filtered materials cleaned off the sieve plates are uniformly collected and processed.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The gas-solid separation device for VOCs waste gas treatment of the present invention achieves efficient gas-solid separation performance through a unique structural design. First, the bending structure of the arc-shaped pipe utilizes the principle of centrifugal force, so that the particles with larger mass are effectively deviated from the center line under the action of the airflow and collected by the collection box on the side wall, thereby preliminarily realizing the pre-separation of the particles. Secondly, the cone-shaped structure inside the separation tank body utilizes the flow velocity gradient effect to decelerate and deposit the particles in the area with lower flow velocity, while the clean gas is quickly discharged in the central area with faster flow velocity. This design not only improves the overall separation efficiency, but also significantly reduces the risk of re-entrainment of particles. In addition, the sieve plate in the gas-solid separation component adopts a design in which the aperture gradually decreases from the inlet side to the outlet side, thereby realizing the graded capture of particles and ensuring that particles of different particle sizes are effectively intercepted on the corresponding sieve plates, thereby enhancing the separation accuracy.

[0020] 2. The present invention innovatively introduces a self-cleaning component, which significantly improves the operating stability and maintenance convenience of the device. The sleeve shaft in the center of the sieve plate slides with the adjusting rod, so that the position of the sieve plate can be adjusted, which is convenient for adapting to different working conditions. The cylinder, elastic frame, cleaning strip, slide, lifting plate, gas rod and push rod in the self-cleaning component work together, and are driven by the motor gear to realize the automatic rotation and cleaning of the cleaning strip on the surface of the sieve plate, effectively removing blocked particles, maintaining the permeability of the sieve plate, and avoiding the decrease in separation efficiency due to blockage of the sieve holes. The cleaning strip is made of flexible magnetic material, and a fitting groove is provided at the bottom to ensure that the cleaning process is closely fitted with the surface of the sieve plate, and the cleaning effect is excellent. This self-cleaning mechanism greatly reduces the frequency of manual cleaning, extends the service life of the device, and ensures the continuous and efficient operation of the gas-solid separation system.

[0021] 3. The gas-solid separation system for VOCs waste gas treatment of the present invention is equipped with a particle concentration detector and a three-way valve, which realizes real-time monitoring and feedback control of the concentration of waste gas particles after treatment. When it is detected that the concentration of waste gas particles does not meet the standard, the system automatically returns the waste gas to be treated for the second time to the separation tank through the return air pipe for re-purification to ensure that the exhaust gas always meets the environmental protection standards. This intelligent monitoring and feedback mechanism enhances the self-regulation ability of the system, ensures the continuity and compliance of waste gas treatment, reduces the monitoring burden of operators, and improves the operating efficiency of the overall treatment system.

[0022] 4. The gas-solid separation system for VOCs waste gas treatment of the present invention is equipped with a high-pressure chamber and a pressure tank, and the waste gas entering the separation tank can be pressurized as needed. By controlling the air pressure valve in the pressure tank, the pressure in the high-pressure chamber is increased, thereby accelerating the speed of the air flow through the separation tank, significantly improving the gas-solid separation efficiency. This design enables the device to maintain high-efficiency separation performance when treating high-concentration, high-flow waste gas, enhancing the system's processing capacity and flexibility in dealing with complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is a cross-sectional view of the present invention;

[0026] Figure 3 It is a schematic diagram of the structural installation of the arc-shaped pipeline and the collection box in the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the gas-solid separation component in the present invention;

[0028] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0029] Figure 6 It is a schematic diagram of the structural installation of the self-cleaning component and the screen body in the present invention;

[0030] Figure 7 It is a schematic diagram of the structural installation of the cylinder and the sleeve shaft in the present invention;

[0031] Figure 8 It is a front view of the adjusting rod and the inner shaft rod in the present invention;

[0032] Fig. 9 It is a side view of the adjusting rod and the inner shaft rod in the present invention.

[0033] In the figure: 1. separation tank body; 2. arc-shaped pipeline; 3. collection box; 4. conical bin; 5. gas-solid separation component; 501. adjustment rod; 502. sieve plate; 503. sleeve shaft; 504. slide seat; 6. cylinder body; 601. cleaning strip; 7. trough body; 8. elastic frame; 9. electromagnetic block; 10. limit ring; 11. lifting plate; 12. push rod; 13. gas rod; 14. slide rod; 15. first transmission wheel; 16. diverter hood; 17. second transmission wheel; 18. inner shaft rod; 19. push plate; 20. return air duct; 21. three-way valve; 22. high-pressure bin; 23. pressurized tank; 24. adsorption system; 25. roller. DETAILED DESCRIPTION

[0034] 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.

[0035] See also Figure 1-9 The gas-solid separation device for treating VOCs waste gas of the present invention comprises an arc-shaped pipeline 2, a separation tank body 1, a gas-solid separation component 5 and other parts, and is also equipped with a return air pipeline 20, a particle concentration detector, a high-pressure chamber 22, a pressurized tank 23 and an adsorption system 24 and other components to jointly realize multi-stage purification of waste gas.

[0036] First, the exhaust gas enters the device through the curved pipe 2 with a bent structure. Under the action of high-speed airflow, the particles are offset due to the difference in centrifugal force, and those with larger mass are more likely to move to the outside of the pipe. Figure 3It can be seen that the arc pipe 2 is a bent S-shaped structure, and a collecting box 3 is provided at the bend near the outer side of the arc pipe 2 to effectively capture the large particles that deviate from the center line and preliminarily achieve gas-solid separation.

[0037] Next, the exhaust gas enters the cone-shaped separation tank 1, whose inner diameter gradually decreases from the inlet side to the outlet side to form a cone-shaped bin 4. This structural design leads to a decrease in the gas flow area, and the flow rate increases accordingly. The uneven distribution of the flow rate makes the air flow slower near the conical wall, which is conducive to the deceleration and deposition of particles; while the flow rate in the central area is fast, which is conducive to the rapid discharge of the separated clean gas, reducing the risk of re-entrainment of particles.

[0038] A gas-solid separation assembly 5 is also provided in the separation tank body 1, and is located in the conical bin 4. The core of the assembly is an adjustment rod 501 installed on the center line, and the rod side is connected to the inner wall of the tank body through an external connector. A plurality of sieve plates 502 are sleeved on the adjustment rod 501, and the size of the sieve plates 502 decreases from the inlet side to the outlet side, and the sieve hole density varies. The sieve plates 502 near the outlet side have a smaller hole density to adapt to the grading and screening of particles of different particle sizes. A slidable sleeve shaft 503 is installed in the center of each sieve plate 502 to ensure the flexible arrangement of the sieve plates 502 on the adjustment rod 501.

[0039] To further optimize the separation effect, the device is equipped with a self-cleaning component for each sieve plate 502 on the adjusting rod 501. The self-cleaning component includes a rotatable cylinder 6, on which multiple groups of upper and lower two-layer troughs 7 are opened. The upper layer of the trough 7 is wider than the lower layer, and the lower layer has an inverted V-shaped elastic frame 8. Electromagnetic blocks 9 are provided on both sides of the inner wall of the upper layer of the trough 7 for adsorbing the cleaning strip 601. A fitting groove is provided at the bottom of the cleaning strip 601 to facilitate close contact with the sieve plate 502. A limiting ring 10 is provided on the sieve plate 502 to form a slide rail with the sleeve shaft 503, and a slide seat 504 and a lifting plate 11 are installed in the slide rail. One end of the lifting plate 11 is hinged on the slide seat 504, and a push rod 12 is provided below it to squeeze one side of the elastic frame 8, and the other side is pressed by a gas rod 13. When the lifting plate 11 is inserted into the trough 7 below the cleaning strip 601, the elastic frame 8 rises, so that the upper surface of the cleaning strip 601 is close to the surface of the sieve plate 502, and rotary cleaning is achieved.

[0040] In order to synchronize the rotation of the cylinder 6 on each sieve plate 502, a plurality of slide bars 14 are inserted into the cylinder 6 near the inlet side. The slide bars 14 penetrate all the sieve plates 502 sleeve shafts 503 and the cylinder 6, and the first transmission wheel 15 is sleeved on the outside. The adjusting rod 501 is provided with a flow divider 16, a motor gear I, an inner shaft 18, a roller 25, a second transmission wheel 17 and a motor gear II. The inner shaft 18 can move inside the adjusting rod 501 through threaded engagement, and push the nearest sieve plate 502 to move toward the cylinder 6 through the push plate 19. When the motor gear II drives the roller 25 to rotate, the push plate 19 at the end of the inner shaft 18 pushes the sieve plate 502 close to the cylinder 6, so that the lifting plate 11 is inserted into the groove 7 below the cleaning strip 601, and the gas rod 13 and the push rod 12 squeeze the elastic frame 8, so that the cleaning strip 601 is attached to the sieve plate 502 and starts to rotate and clean.

[0041] The present invention provides a gas-solid separation system for treating VOCs waste gas, and the entire gas-solid separation system also includes a return air duct 20, a three-way valve 21, a particle concentration detector, etc. The treated waste gas is transported through the return air duct 20, and the particle concentration detector monitors its cleanliness in real time. If it does not meet the standard, the three-way valve 21 will return the waste gas to the separation tank body 1 for secondary treatment; the waste gas that meets the standard will be sent to the subsequent treatment equipment through another pipeline. In addition, the system is equipped with a high-pressure warehouse 22 and a pressurized tank 23 to enhance the separation efficiency: after the waste gas is filled into the pressurized tank 23, the air pressure valve is opened, and the high-pressure gas enters the high-pressure warehouse 22, increasing the air pressure in the tank, prompting the airflow to accelerate through the separation tank body 1, and improving the separation efficiency.

[0042] Finally, an adsorption system 24, including a fan and a particle discharge pipe, is installed on the separation tank 1. The adsorption system 24 uses a dust suction pipe arranged between two sieve plates 502 to uniformly suck the cleaned particles into the particle discharge pipe for centralized collection and treatment, thereby ensuring the high efficiency and environmental protection of the separation process.

[0043] Here’s how it works:

[0044] Primary separation: The exhaust gas first enters the arc-shaped pipe 2. Due to the curved structure of the pipe, the particles in the high-speed airflow are subjected to stronger centrifugal force under the action of centrifugal force. The particles with larger mass deviate from the center line of the airflow and move to the outside of the pipe. These particles are then effectively captured by the collection box 3 located outside the pipe, completing the initial gas-solid separation.

[0045] Deep separation and self-cleaning: The exhaust gas continues to enter the cone-shaped separation tank 1. The inner diameter of the tank gradually decreases to form a cone-shaped bin 4. This design makes the gas flow rate unevenly distributed in the tank. The flow rate is lower near the conical wall, which is conducive to the deceleration and deposition of particles; the flow rate in the center area is higher, which is conducive to the rapid discharge of clean gas and reduces the risk of re-entrainment of particles.

[0046] Gas-solid separation component 5: The gas-solid separation component 5 located in the conical bin 4 is composed of an adjustment rod 501 and a plurality of sieve plates 502. The size and hole density of the sieve plates 502 decrease from the inlet side to the outlet side to achieve graded screening of particles. The sleeve shaft 503 at the center of the sieve plate 502 can be slidably mounted on the adjustment rod 501 to facilitate position adjustment.

[0047] Self-cleaning mechanism: The self-cleaning components on each sieve plate 502 include a rotatable cylinder 6, a slot 7, an elastic frame 8, a cleaning strip 601, a slide 504, a lifting plate 11, a push rod 12, and a gas rod 13. When cleaning is required, the motor drives the relevant components to move, so that the lifting plate 11 is inserted into the slot 7 below the cleaning strip 601, and the elastic frame 8 is pressurized and raised, so that the upper surface of the cleaning strip 601 is closely attached to the surface of the sieve plate 502. As the cylinder 6 rotates, the cleaning strip 601 rotates with the lifting plate 11, scraping and cleaning the surface of the sieve plate 502 to remove adhered particles.

[0048] Linkage and control: through the slide bar 14, transmission wheel, motor gear and other structures, ensure that the cylinder 6 on all the sieve plates 502 can rotate synchronously, and realize the synchronous cleaning operation of the cleaning strip 601 on the sieve plates 502. Internal mechanism of the adjustment rod 501: the motor drives the inner shaft 18 to move, and the push plate 19 pushes the nearest sieve plate 502 close to the cylinder 6 to start the self-cleaning process.

[0049] Return air duct 20 and particle concentration detection: The treated waste gas is transported through the return air duct 20, and the particle concentration detector monitors its particle content in real time. If the emission standard is not met, the three-way valve 21 will return the waste gas to the separation tank 1 for secondary treatment; the waste gas that meets the standard will be transported to the subsequent treatment equipment.

[0050] Pressurization improves efficiency: The system is equipped with a high-pressure chamber 22 and a pressurized tank 23. After the exhaust gas is charged into the pressurized tank 23, the air pressure valve is opened, and the high-pressure gas enters the high-pressure chamber 22, increasing the air pressure in the tank, accelerating the airflow through the separation tank body 1, and improving the separation efficiency.

[0051] Adsorption system 24: particle collection, the separation tank 1 is installed with an adsorption system 24, including a fan and a particle discharge pipe. The fan sucks the particles deposited on the sieve plate 502 into the particle discharge pipe through the dust suction pipe arranged between the two sieve plates 502 for centralized collection and treatment.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to be a further limitation of the present invention. All equivalent changes made using the contents of the present specification and drawings are within the protection scope of the present invention.

Claims

1. A gas-solid separation device for VOCs waste gas treatment, characterized in that: It comprises a separation tank body (1) and an arc-shaped pipe (2) connected to one end of the separation tank body (1) for air intake, wherein the arc-shaped pipe (2) is of a bent structure, and a collection box (3) is provided at a side wall of the arc-shaped pipe (2) close to the outside; The interior of the separation tank body (1) is in a conical structure, and the inner diameter gradually decreases from the side of the separation tank body (1) close to the arc-shaped pipeline (2) to the other side of the separation tank body (1), thereby forming a conical bin (4); A gas-solid separation assembly (5) is provided inside the separation tank body (1). The gas-solid separation assembly (5) is located in the conical bin (4). The gas-solid separation assembly (5) comprises an adjustment rod (501) installed at the center line of the conical bin (4). The side end of the adjustment rod (501) is connected to the inner wall of the separation tank body (1) via an external component. A plurality of sieve plates (502) are sleeved on the adjustment rod (501) at intervals. The plurality of sieve plates (502) are gradually reduced in size from the inlet side to the outlet side of the conical bin (4). The sieve hole density on each sieve plate (502) is different, and the sieve plate (502) with a smaller sieve hole density is further away from the inlet side of the conical bin (4).

2. A gas-solid separation device for treating VOCs waste gas according to claim 1, characterized in that: A sleeve shaft (503) is installed at the center of each sieve plate (502), and the sleeve shaft (503) can be slidably installed on the adjustment rod (501).

3. A gas-solid separation device for treating VOCs waste gas according to claim 2, characterized in that: A self-cleaning component is provided at a position corresponding to each sieve plate (502) on the adjusting rod (501), and the self-cleaning component comprises a barrel (6) rotatably mounted on the adjusting rod (501), a plurality of slots (7) are provided on the circumference of the barrel (6), the slots (7) are divided into an upper and lower layer structure, the width of the upper layer is greater than the width of the lower layer, an inverted V-shaped elastic frame (8) is provided on the lower layer of the slots (7), and both sides of the inner wall of the upper layer of the slots (7) are provided with electromagnetic blocks (9) protruding outwards for supporting the cleaning strip (601), the cleaning strip (601) adopts an adsorbable structure and can be adsorbed and fixed by the electromagnetic blocks (9), and the sieve plate (502) is provided with a diameter greater than the sleeve shaft. The limiting ring (10) of (503) forms an annular slide rail with the sleeve shaft (503), and a slide seat (504) is provided inside the annular slide rail, the slide seat (504) being consistent with the position and number of the groove body (7), the slide seat (504) is connected to the outer wall of the sleeve shaft (503) and can be slidably arranged in the annular slide rail, a lifting plate (11) is provided between the slide seat (504) and the corresponding groove body (7), one side of the lifting plate (11) is hinged on the slide seat (504), and a push rod (12) for squeezing one side of the elastic frame (8) is provided directly below the lifting plate (11) near the slide seat (504), and a gas rod (13) for squeezing the side of the elastic frame (8) is installed on the groove body (7) on the other side of the elastic frame (8).

4. A gas-solid separation device for treating VOCs waste gas according to claim 3, characterized in that: A plurality of slide rods (14) are inserted into the cylinder (6) near the inlet side of the conical bin (4), one end of each slide rod (14) extends to the outside of the cylinder (6) near the inlet side of the conical bin (4), and the other end of each slide rod (14) passes through the sleeve shafts (503) of all the sieve plates (502) on the adjustment rod (501) and the cylinder (6).

5. A gas-solid separation device for treating VOCs waste gas according to claim 4, characterized in that: The sliding rod (14) is located on the outer part of the cylinder (6) at the inlet side of the conical bin (4) and is sleeved with a first transmission wheel (15); a diverter hood (16) with a conical structure is installed on the adjusting rod (501); a motor gear I for driving the first rotating wheel is installed in the diverter hood (16); a rotatable roller (25) is installed on the inner shaft rod (18) inside the adjusting rod (501) at the inlet side of the conical bin (4); a second transmission wheel (17) is installed on the roller (25); and a motor gear II for driving the first rotating wheel is installed in the diverter hood (16); the inner thread of the adjusting rod (501) is matched with the inner shaft rod (18); the adjusting rod (501) is located at the sieve plate (502) near the inlet side of the conical bin (4) and is designed in a hollow structure; a push plate (19) protruding from the outside of the adjusting rod (501) is provided at the end of the inner shaft rod (18) located at this position.

6. A gas-solid separation device for treating VOCs waste gas according to claim 3, characterized in that: The cleaning strip (601) is made of a flexible magnetic material and has a fitting groove at its bottom. When the screen plate (502) moves toward the cylinder (6), the lifting plate (11) is inserted into the groove (7) below the cleaning strip (601).

7. A gas-solid separation device for treating VOCs waste gas according to claim 6, characterized in that: The sieve plate (502) is a trumpet-shaped structure with an inner diameter gradually decreasing from the inlet side close to the conical bin (4) to the outlet side.

8. The gas-solid separation system of the gas-solid separation device for VOCs waste gas treatment according to any one of claims 1 to 7, characterized in that: The invention comprises a return air duct (20), wherein the return air duct (20) is connected to the exhaust port of the separation tank body (1), and a three-way valve (21) and a particle concentration detector are installed on the return air duct (20). When the particle concentration detector detects that the treated waste gas does not meet the standard, the waste gas to be treated is returned to the separation tank body (1) through the return air duct (20) connected to the three-way valve (21); when the particle concentration detector detects that the treated waste gas meets the standard, the waste gas is transferred to a subsequent treatment device through another duct connected to the three-way valve (21) for further treatment.

9. A gas-solid separation system for VOCs waste gas treatment according to claim 8, characterized in that: A high-pressure chamber (22) and a pressurized tank (23) connected to the interior of the high-pressure chamber (22) are installed between the separation tank body (1) and the arc-shaped pipe (2). The high-pressure chamber (22) and the pressurized tank (23) are connected so that waste gas is filled into the pressurized tank (23). When the air pressure valve in the pressurized tank (23) is opened, the gas in the pressurized tank (23) enters the high-pressure chamber (22), increasing the pressure in the high-pressure chamber (22). After the valve controlling the high-pressure chamber (22) is opened, the air flow is accelerated through the interior of the separation tank body (1), thereby increasing the separation efficiency.

10. A gas-solid separation system for VOCs waste gas treatment according to claim 9, characterized in that: The separation tank body (1) is equipped with an adsorption system (24), the adsorption system (24) being equipped with a fan and a particle discharge pipe for adsorbing the interior of the separation tank body (1), the particle discharge pipe being connected to the interior of the separation tank body (1) via a dust suction pipe, each of the dust suction pipes being arranged at intervals within a spacing interval formed by two sieve plates (502) located within the separation tank body (1), so that filtered matter cleaned from the sieve plates (502) is uniformly collected and processed.

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