Modified activated carbon layered high-efficiency gas filtering device

Abstract

This invention relates to the field of gas purification and filtration technology, and discloses a modified activated carbon layered high-efficiency gas filtration device, including a housing. An air inlet is provided on one side of the housing. L-shaped partition plates are fixedly installed on both the upper and lower sides of the housing's interior. The ends of the L-shaped partition plates near the sealing connecting plate are connected via the sealing connecting plate. The interior of the housing is divided by the L-shaped partition plates and the sealing connecting plate into an upper and lower exhaust chamber, a middle air inlet chamber, and a pretreatment chamber near the air inlet. A porous flow equalization plate is movably installed in the middle of each L-shaped partition plate, and a layered filter assembly is fixedly installed on the outer end of each porous flow equalization plate. This invention achieves self-cleaning of impurities through pretreatment, combined with three layers of activated carbon for layered gradient purification, and supplemented by a linkage resonance oscillation structure, increasing the gas contact area, preventing clogging, resulting in low energy consumption, high filtration efficiency, and long-term stable completion of waste gas purification operations.

Description

Technical Field

[0001] This invention relates to the field of gas purification and filtration technology, specifically to a modified activated carbon stratified high-efficiency gas filtration device. Background Technology

[0002] With the increase in industrial production and daily production activities, the emission of various waste gases containing dust and harmful gases continues to rise, leading to the widespread application of gas purification equipment. Activated carbon, with its excellent adsorption properties, has become a commonly used purification material in the field of gas filtration. However, traditional activated carbon filtration equipment has a simple structure and often uses a single activated carbon layer for purification, making it difficult to handle waste gases with complex compositions, and its purification capacity has significant shortcomings.

[0003] Most conventional activated carbon filtration devices on the market are fixed structures, resulting in limited contact between the exhaust gas and the activated carbon and low adsorption efficiency. Furthermore, these devices generally lack pre-treatment structures, allowing large particles of dust, hair, and other impurities in the exhaust gas to directly adhere to the activated carbon surface, clogging the pores. This not only significantly shortens the lifespan of the activated carbon but also causes frequent equipment downtime for maintenance, leading to high operating costs.

[0004] Furthermore, existing equipment suffers from single-zone design, turbulent airflow, and often employs multiple independent drive components, resulting in high overall energy consumption, complex structure, and a high failure rate. To address these shortcomings, there is an urgent need to develop a high-efficiency gas filtration device that features layered purification, self-cleaning capabilities, and enhanced gas-material contact. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a modified activated carbon layered high-efficiency gas filtration device, which solves the problems of existing activated carbon filtration devices, such as lack of pretreatment, easy clogging of activated carbon layers, insufficient gas-material contact, low purification efficiency, high energy consumption of multi-drive structures, inconvenient operation and maintenance, and poor long-term operational stability.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a modified activated carbon layered high-efficiency gas filtration device, comprising a housing, an air inlet on one side of the housing, an exhaust outlet on the other side of the housing, L-shaped partition plates fixedly installed on both the upper and lower sides of the housing interior, the ends of the L-shaped partition plates near the sealing connecting plate being connected by the sealing connecting plate, the housing interior being divided into an upper and lower exhaust chamber, a middle air inlet chamber, and a pretreatment chamber near the air inlet by the L-shaped partition plates and the sealing connecting plate, a porous flow equalization plate movably installed in the middle of each L-shaped partition plate, and a layered filter assembly fixedly installed on the outer ends of each porous flow equalization plate, the layered filter assembly comprising a fixed bracket, a coarse-grained ordinary activated carbon layer fixedly installed on the inner side of each fixed bracket, a modified activated carbon layer fixedly installed in the middle of each fixed bracket, and a honeycomb activated carbon layer fixedly installed on the outer side of each fixed bracket.

[0007] Preferably, a geared motor is fixedly installed at the top of the housing, the drive end of the geared motor extends into the interior of the housing and is fixedly installed with a main shaft, a drive gear is fixedly installed at the bottom end of the main shaft, a side shaft is movably installed on one side of the top wall of the housing, and a driven gear is fixedly installed on the outer diameter of the middle part of the side shaft, and the driven gear meshes with the inner end of the drive gear.

[0008] Preferably, a first cam is fixedly installed at the bottom end of the side shaft, and the end of the first cam is movably installed at one end of the connecting rod. An output shaft is fixedly installed at the top end of the upper layered filter assembly, and a second cam is fixedly installed at the top end of the output shaft, with the end of the second cam movably installed at the other end of the connecting rod.

[0009] Preferably, the inner ends of the two porous flow equalization plates are connected by a torsion beam, and a spring is fixedly installed in the middle of the torsion beam.

[0010] Preferably, a drive shaft is movably mounted on the inner top of the housing, a drive bevel gear is fixedly mounted on the outer diameter of the middle part of the main shaft, and a driven bevel gear is fixedly mounted on the front end of the drive shaft, with the driven bevel gear meshing with the inner end of the drive bevel gear.

[0011] Preferably, the upper and lower sides of the pretreatment chamber are equipped with synchronous pulleys via movable shafts, and the outer diameters of the synchronous pulleys are connected by a porous filter belt. A scraper is fixedly installed at the bottom of the pretreatment chamber.

[0012] Preferably, the rear end of the drive shaft extends to the outside of the housing and is fixedly mounted with a drive wheel, and the rear end of the movable shaft of the upper synchronous wheel extends to the outside of the housing and is fixedly mounted with a driven wheel. The outer diameters of the drive wheel and the driven wheel are connected by a drive belt.

[0013] Preferably, the front end of the housing is equipped with an inspection door.

[0014] This invention provides a modified activated carbon stratified high-efficiency gas filtration device. It has the following beneficial effects:

[0015] 1. This invention, by setting up an independent pretreatment chamber and relying on a geared motor for power, drives a porous filter belt to operate continuously through multiple transmission structures. This effectively intercepts solid impurities such as hair and large dust particles inside the exhaust gas, effectively avoiding the problem of activated carbon pores being blocked by solid impurities and reducing the workload of the layered filtration components. Simultaneously, a fixed scraper automatically removes impurities adhering to the surface of the filter belt, achieving self-cleaning of the filter and extending the service life of the subsequent activated carbon filtration structure.

[0016] 2. This invention utilizes a transmission mechanism consisting of gears, cams, and connecting rods, powered by a geared motor, to drive the layered filter components and the porous flow equalization plate in a reciprocating oscillating motion. This overcomes the limitations of traditional fixed filter structures with their limited gas contact range, increasing the contact area and frequency between the exhaust gas and each layer of activated carbon. It eliminates dead zones in gas flow, improves the adsorption efficiency of activated carbon for pollutants in the exhaust gas, and significantly enhances the overall gas filtration rate. Simultaneously, the porous flow equalization plate guides and slows down the exhaust gas within the intake chamber, ensuring a uniform flow to the filter components and preventing insufficient filtration caused by excessively rapid local air intake.

[0017] 3. This invention utilizes two sets of porous flow equalization plates, upper and lower, that work together via a torsion beam and a spring plate. The spring plate fixes the center position of the torsion beam. When the upper porous flow equalization plate swings and deflects, it stores torque and transmits it to the bottom of the torsion beam, synchronously driving the lower filter assembly to move in sync. This ensures that the filter assemblies on both sides of the housing operate in the same manner, avoiding differences in filtration progress and effect between the two sides. Furthermore, the torsion beam can generate resonance during accelerated deflection, amplifying the output torque. This can autonomously counteract the operating load caused by the accumulation of impurities in the activated carbon pores, enhancing the high-frequency vibration effect of the components, achieving autonomous pore clearing of the activated carbon layer, alleviating the problems of pollutant accumulation and clogging, and improving the stability and continuous filtration performance of the equipment during long-term continuous operation. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a front sectional view of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the layered filtration assembly of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0022] Figure 5This is a schematic diagram of the geared motor in this invention.

[0023] The components are as follows: 1. Housing; 2. Air inlet; 3. Exhaust outlet; 4. L-shaped partition plate; 5. Sealing and connecting plate; 6. Exhaust chamber; 7. Air inlet chamber; 8. Pretreatment chamber; 9. Porous flow equalization plate; 10. Layered filter assembly; 1001. Fixed bracket; 1002. Coarse-grained ordinary activated carbon layer; 1003. Modified activated carbon layer; 1004. Honeycomb activated carbon layer; 11. Gear motor; 12. Main shaft; 13. Drive gear; 14. Side shaft; 15. Driven gear; 16. First cam; 17. Connecting rod; 18. Output shaft; 19. Second cam; 20. Torsion beam; 21. Spring; 22. Drive shaft; 23. Drive bevel gear; 24. Driven bevel gear; 25. Drive wheel; 26. Synchronizing pulley; 27. Porous filter belt; 28. Driven wheel; 29. ​​Drive belt; 30. Scraper; 31. Inspection door. Detailed Implementation

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

[0025] Example:

[0026] Please see the appendix Figure 1 -Appendix Figure 5 This invention provides a modified activated carbon stratified high-efficiency gas filtration device, such as... Figure 1 As shown, the equipment includes a housing 1, which serves as the main supporting frame of the filtration device. It provides an installation carrier and protective space for all internal purification and transmission components, while also isolating external environmental interference, concentrating internal airflow, and regulating the flow path of exhaust gas. An air inlet 2 is provided on one side of the housing 1. The air inlet 2 is a dedicated channel for introducing industrial waste gas and pollutant gas to be treated. It can smoothly transport the external waste gas to be filtered into the pretreatment chamber 8 inside the housing 1 to complete the equipment's air intake operation. It is the starting port of the waste gas purification process. An exhaust port 3 is provided on the other side of the housing 1. The clean gas after pretreatment and stratified adsorption purification can be collected through the exhaust port 3 and discharged outwards, completing the entire waste gas filtration process and realizing the release of qualified gas.

[0027] L-shaped partition plates 4 are fixedly installed on both the upper and lower sides of the interior of the housing 1. The L-shaped partition plates 4 are the core components for dividing the cavity. Relying on their special L-shaped structure and in conjunction with the sealing connection plate 5, they form a closed partition structure with the inner wall of the housing 1. At the same time, they can support the porous flow equalization plate 9 and the layered filter assembly 10, improving the stability of the internal filter assembly installation. The end of the L-shaped partition plate 4 near the sealing connection plate 5 is connected by the sealing connection plate 5. The sealing connection plate 5 can connect and seal the two sets of symmetrically arranged L-shaped partition plates 4, filling the gap between the L-shaped partition plates 4 and preventing exhaust gas from entering. In case of crossflow or leakage, the airtightness of each independent chamber is ensured to prevent unpurified waste gas from directly mixing into the clean gas. The interior of the housing 1 is divided into an upper and lower exhaust chamber 6, a middle air intake chamber 7, and a pretreatment chamber 8 near the air inlet 2 by an L-shaped partition plate 4 and a sealing connection plate 5. The multi-chamber independent partition structure can isolate multiple processes such as air intake pretreatment, waste gas buffering and guiding, layered filtration, and clean gas collection and exhaust from each other, avoid mutual interference of airflow in different purification stages, realize step-by-step progressive purification of waste gas, and greatly optimize the filtration operation logic.

[0028] Each L-shaped partition plate 4 has a porous flow equalization plate 9 movably installed in its middle. The porous flow equalization plate 9 has the functions of airflow guidance and deceleration and pressure stabilization. The exhaust gas flowing through the air inlet chamber 7 can pass through the plate and be evenly dispersed to the surface of the layered filter assembly 10, solving the problem of excessive local airflow velocity and concentrated air intake. At the same time, the porous flow equalization plate 9 can reciprocate with the transmission structure, which helps to improve the contact effect between the exhaust gas and the filter assembly. The layered filter assembly 10 is fixedly installed on the outer end of the porous flow equalization plate 9. The layered filter assembly 10 is the core purification component of this equipment. It receives the exhaust gas after pressure stabilization and guidance by the porous flow equalization plate 9, and performs all-round adsorption and purification of dust and toxic and harmful gases in the exhaust gas through the multi-layer activated carbon structure, thus completing the core filtration operation of the exhaust gas.

[0029] The layered filter assembly 10 includes a fixed bracket 1001, which serves as a support base for the three activated carbon layers. The fixed bracket 1001 limits and fixes each activated carbon layer, preventing displacement, detachment, or loosening during high-frequency oscillation. It also provides adequate ventilation space to ensure smooth passage of exhaust gas through each activated carbon filter layer. Coarse-grained ordinary activated carbon layers 1002 are fixedly installed on the inner side of the fixed bracket 1001. These layers act as the first filtration barrier, intercepting residual fine dust and large gaseous impurities in the exhaust gas, sharing the workload of subsequent filtration stages, and effectively preventing solid impurities from clogging the pores of the modified activated carbon layer 1003 and the honeycomb activated carbon layer 1004, thus extending the filtration time. The overall filter assembly has a maintenance cycle. Modified activated carbon layer 1003 is fixedly installed in the middle of the fixed bracket 1001. Modified activated carbon layer 1003 has extremely strong targeted adsorption performance. Compared with ordinary activated carbon, it can specifically adsorb a variety of common toxic and harmful gaseous pollutants such as formaldehyde, benzene series, and sulfides, and is specially used to treat gaseous pollutants in waste gas. Honeycomb activated carbon layer 1004 is fixedly installed on the outside of the fixed bracket 1001. The honeycomb activated carbon layer 1004 has a dense pore structure and excellent air permeability. As a terminal deep purification structure, it can adsorb trace amounts of residual pollutants in waste gas, perform final fine purification treatment on waste gas, further improve gas cleanliness, and ensure that the final discharged gas meets environmental emission standards.

[0030] In this embodiment, a geared motor 11 is fixedly installed at the top of the housing 1. The geared motor 11 is the sole power source of this equipment, integrating power output and speed control functions. It eliminates the need for multiple additional drive devices and can simultaneously provide stable power to the pretreatment self-cleaning mechanism and the oscillating vibration mechanism of the filter assembly, reducing equipment energy consumption and manufacturing costs. The drive end of the geared motor 11 extends into the interior of the housing 1 and is fixedly installed with a main shaft 12. The main shaft 12 is a power transfer hub, receiving the torque output from the geared motor 11 and rotating synchronously. Simultaneously, it transmits power to the gear transmission structure and the bevel gear transmission structure, achieving a single-power, multi-structure synchronous operation mode. A drive gear 13 is fixedly installed at the bottom of the main shaft 12, rotating synchronously with the main shaft 12, relying on the gear... The gear meshing principle transmits vertical rotational power to the driven gear 15, providing basic power for the subsequent cam-linkage swing mechanism, driving the filter assembly to complete the reciprocating swing action. A side shaft 14 is movably installed on one side of the top wall of the housing 1. The side shaft 14 can rotate freely at a designated position on the top wall of the housing 1. It is mainly used to support the driven gear 15 and the first cam 16, receiving the power transmitted by the gear transmission structure, and ensuring that the cam-linkage mechanism can start and stop normally. The driven gear 15 is fixedly installed on the outer diameter of the middle part of the side shaft 14, and the driven gear 15 is meshed with the inner end of the driving gear 13. Through the meshing transmission of the driving gear 13 and the driven gear 15, the direction and speed of power transmission can be changed, driving the side shaft 14 to rotate at a uniform speed, realizing the stable transmission of power from the main shaft 12 to the side shaft 14.

[0031] Furthermore, a first cam 16 is fixedly mounted on the bottom end of the side shaft 14. The first cam 16 follows the side shaft 14 in a circular rotational motion, converting the rotational power of the side shaft 14 into reciprocating push-pull power. This, in conjunction with the connecting rod 17, completes the power transfer and is the core transmission component for realizing the oscillation of the filter assembly. The end of the first cam 16 is movably mounted on one end of the connecting rod 17, which acts as a power bridge. One end receives the circular motion power of the first cam 16, while the other end links with the second cam 19, thus achieving bidirectional power transmission and driving the output shaft 18 to reciprocate and oscillate. The top of the upper layered filter assembly 10... An output shaft 18 is fixedly installed at one end. The output shaft 18 can receive the reciprocating power transmitted by the cam linkage mechanism and directly drive the layered filter assembly 10 and the porous flow equalization plate 9 bound below to swing synchronously, increasing the contact area between the exhaust gas and the activated carbon layer and improving the adsorption and filtration efficiency. A second cam 19 is fixedly installed at the top of the output shaft 18 and the end of the second cam 19 is movably installed at the other end of the connecting rod 17. The second cam 19 and the first cam 16 cooperate with each other to balance the transmission stress at both ends of the connecting rod 17, making the swing rhythm of the output shaft 18 more stable and avoiding the problems of easy jamming and uneven amplitude of single cam transmission.

[0032] Furthermore, the inner ends of the two porous flow equalization plates 9 are connected by a torsion beam 20. The torsion beam 20 is a linkage component of the upper and lower filter components, which can synchronously connect the upper and lower porous flow equalization plates 9 to achieve power interconnection, ensure that the swing rhythm of the two stratified filter components 10 is consistent, and balance the filtration effect of the upper and lower areas inside the housing 1. A spring plate 21 is fixedly installed in the middle of the torsion beam 20. The spring plate 21 can fix the center point of the torsion beam 20 and limit the center point offset. When the upper porous flow equalization plate 9 deflects, it stores torque and transmits the torque to the bottom of the torsion beam 20 to drive the lower component. At the same time, when the component deflects to the threshold, it can generate resonance at the same frequency, amplify the torque, and enhance the anti-clogging effect of the component's porous structure.

[0033] Furthermore, a drive shaft 22 is movably installed on the inner top of the housing 1. The drive shaft 22 is mainly used to receive the power of the bevel gear transmission structure and link with the external gear transmission structure to transmit the power to the pretreatment chamber 8, providing power support for the operation of the porous filter belt 27. A drive bevel gear 23 is fixedly installed on the outer diameter of the middle part of the main shaft 12. The drive bevel gear 23 rotates synchronously with the main shaft 12, which can change the power transmission direction, converting the vertical power into the horizontal power, adapting to the installation layout of the drive shaft 22, and completing the power diversion. A driven bevel gear 24 is fixedly installed at the front end of the drive shaft 22, and the driven bevel gear 24 meshes with the inner end of the drive bevel gear 23. Through the meshing of the two sets of bevel gears, the power transmission from the main shaft 12 to the drive shaft 22 is realized efficiently, and the pretreatment mechanism can be driven without additional power equipment, simplifying the overall structure of the equipment.

[0034] Furthermore, synchronous pulleys 26 are installed on both the upper and lower sides of the pretreatment chamber 8 via movable shafts. The synchronous pulleys 26, symmetrically arranged, are used to tension and support the porous filter belt 27, restricting the belt's running trajectory and preventing belt deviation or detachment, thus ensuring continuous and stable operation of the pretreatment process. The outer diameters of the synchronous pulleys 26 are connected by the porous filter belt 27, which is the core component of the pre-filtration system. Its surface filter structure can efficiently intercept solid impurities such as hair and large dust particles in the exhaust gas, reducing the workload of the layered filter assembly 10 from the source. A scraper 30 is fixedly installed at the bottom of the pretreatment chamber 8. The scraper 30 is fixed in position and fits against the lower surface of the porous filter belt 27. During the belt's circulation, it can automatically scrape off stubborn impurities adhering to the belt surface, achieving self-cleaning of the filter screen, avoiding clogging of the filter screen pores, and ensuring the pre-filtration effect.

[0035] Furthermore, the rear end of the drive shaft 22 extends to the outside of the housing 1 and is fixedly mounted with a drive wheel 25. The drive wheel 25 rotates synchronously with the drive shaft 22, serving as the power input end of the external gear train transmission, and exporting the power inside the housing 1 to the transmission structure outside the pretreatment chamber 8. The rear end of the movable shaft of the upper synchronous wheel 26 extends to the outside of the housing 1 and is fixedly mounted with a driven wheel 28. The driven wheel 28 is the power receiving end, receiving the power transmitted by the drive wheel 25 and driving the synchronous wheel 26 to rotate, thereby driving the porous filter belt 27 to circulate. The outer diameters of the drive wheel 25 and the driven wheel 28 are connected by a transmission belt 29. The transmission belt 29 has the advantages of shock absorption, noise reduction, and overload buffering, and can flexibly transmit the power of the gear train, reduce the operating noise of the pretreatment mechanism, reduce the probability of wear of parts, and extend the service life of parts.

[0036] Furthermore, a maintenance door 31 is installed at the front of the housing 1, allowing staff to directly open the maintenance door 31 and quickly enter the housing 1 to inspect, replace, and perform routine maintenance on the layered filter assembly 10, filter belt, various transmission gears, and cam components, significantly reducing the difficulty of later operation and maintenance of the equipment.

[0037] Working principle:

[0038] The exhaust gas to be filtered is introduced into the housing 1 through the air inlet 2. The exhaust gas first enters the pretreatment chamber 8. At this time, the geared motor 11 is started, which drives the main shaft 12 to rotate, thereby driving the drive bevel gear 23 to rotate. The drive bevel gear 23 drives the driven bevel gear 24 and the transmission shaft 22 to rotate, which in turn drives the drive wheel 25 to rotate. The rotating drive wheel 25 drives the driven wheel 28 to rotate through the transmission belt 29. The rotating driven wheel 28 drives the synchronous pulley 26 to rotate, thereby driving the porous filter belt 27 to move continuously. The porous filter belt 27 intercepts large particles such as hair and dust in the exhaust gas. To remove particulate impurities and reduce the filtration pressure on subsequent activated carbon layers, the scraper 30 removes impurities adhering to its surface as the porous filter belt 27 moves, ensuring filtration efficiency. The pre-filtered exhaust gas enters the inlet chamber 7, where the porous flow equalizer 9 guides and slows the flow, ensuring a uniform and stable entry into the layered filter components 10 on both sides. First, the coarse-grained ordinary activated carbon layer 1002 traps residual dust and large molecular impurities, reducing the load on subsequent layers. Then, the modified activated carbon layer 1003 specifically adsorbs formaldehyde, benzene compounds, and sulfides. Finally, the honeycomb activated carbon layer 1004 deeply adsorbs trace amounts of pollutants. To ensure that the exhaust gas meets the standards, the clean air enters the exhaust chamber 6 and is finally discharged through the exhaust port 3. Furthermore, when the main shaft 12 rotates, it drives the drive gear 13 to rotate, which in turn drives the driven gear 15 and the side shaft 14 to rotate, thereby driving the first cam 16 to rotate. The rotation of the first cam 16 causes one end of the connecting rod 17 to move in a circular motion. Combined with the action of the second cam 19, this causes the output shaft 18 to rotate and oscillate rapidly, thereby causing the layered filter assembly 10 and the porous flow equalization plate 9 to follow suit, significantly increasing the contact area between the exhaust gas and the activated carbon. The contact frequency is increased to improve the filtration effect. When the upper porous flow equalizing plate 9 reciprocates and swings, it will cause the top of the torsion beam 20 to deflect accordingly. The spring plate 21 keeps the center point of the torsion beam 20 stationary, stores and transmits torque to the bottom of the torsion beam 20, and drives the lower porous flow equalizing plate 9 to follow the movement. This ensures that the filtration effect of the upper and lower layered filter components 10 is the same. At the same time, as the torsion beam 20 accelerates and deflects, the upper and lower ends gradually become the same frequency. The resulting resonance increases the output torque of the torsion beam 20, effectively counteracting the load caused by the accumulation of impurities in the activated carbon, improving the high-frequency vibration effect, and thus improving the continuous filtration capacity.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modified activated carbon stratified high-efficiency gas filtration device, comprising a housing (1), characterized in that, An air inlet (2) is provided on one side of the housing (1), and an exhaust outlet (3) is provided on the other side of the housing (1). L-shaped partition plates (4) are fixedly installed on both the upper and lower sides of the interior of the housing (1). The end of the L-shaped partition plate (4) near the sealing connection plate (5) is connected by the sealing connection plate (5). The interior of the housing (1) is divided into an exhaust chamber (6) on the upper and lower sides, an air inlet chamber (7) in the middle, and a pretreatment chamber (8) near the air inlet (2) by the L-shaped partition plate (4) and the sealing connection plate (5). A porous flow equalization plate (9) is movably installed in the middle of the partition plate (4). A layered filter assembly (10) is fixedly installed on the outer side of the porous flow equalization plate (9). The layered filter assembly (10) includes a fixed bracket (1001). A coarse-grained ordinary activated carbon layer (1002) is fixedly installed on the inner side of the fixed bracket (1001). A modified activated carbon layer (1003) is fixedly installed in the middle of the fixed bracket (1001). A honeycomb activated carbon layer (1004) is fixedly installed on the outer side of the fixed bracket (1001).

2. The modified activated carbon stratified high-efficiency gas filtration device according to claim 1, characterized in that, A geared motor (11) is fixedly installed at the top of the housing (1). The drive end of the geared motor (11) extends into the interior of the housing (1) and is fixedly installed with a main shaft (12). A drive gear (13) is fixedly installed at the bottom of the main shaft (12). A side shaft (14) is movably installed on one side of the top wall of the housing (1). A driven gear (15) is fixedly installed on the outer diameter of the middle part of the side shaft (14), and the driven gear (15) meshes with the inner end of the drive gear (13).

3. The modified activated carbon stratified high-efficiency gas filtration device according to claim 2, characterized in that, The bottom end of the side shaft (14) is fixedly mounted with a first cam (16), the end of the first cam (16) is movably mounted on one end of the connecting rod (17), the top end of the upper layered filter assembly (10) is fixedly mounted with an output shaft (18), the top end of the output shaft (18) is fixedly mounted with a second cam (19), and the end of the second cam (19) is movably mounted on the other end of the connecting rod (17).

4. The modified activated carbon stratified high-efficiency gas filtration device according to claim 1, characterized in that, The inner ends of the two porous flow equalization plates (9) are connected by a torsion beam (20), and a spring piece (21) is fixedly installed in the middle of the torsion beam (20).

5. The modified activated carbon stratified high-efficiency gas filtration device according to claim 2, characterized in that, A drive shaft (22) is movably installed on the inner top of the housing (1). A drive bevel gear (23) is fixedly installed on the outer diameter of the middle part of the main shaft (12). A driven bevel gear (24) is fixedly installed at the front end of the drive shaft (22), and the driven bevel gear (24) meshes with the inner end of the drive bevel gear (23).

6. The modified activated carbon stratified high-efficiency gas filtration device according to claim 5, characterized in that, The upper and lower sides of the pretreatment chamber (8) are equipped with synchronous pulleys (26) via movable shafts. The outer diameters of the synchronous pulleys (26) are connected by a porous filter belt (27). A scraper (30) is fixedly installed at the bottom of the pretreatment chamber (8).

7. The modified activated carbon stratified high-efficiency gas filtration device according to claim 6, characterized in that, The rear end of the drive shaft (22) extends to the outside of the housing (1) and is fixedly mounted with a drive wheel (25). The rear end of the movable shaft of the upper synchronous wheel (26) extends to the outside of the housing (1) and is fixedly mounted with a driven wheel (28). The outer diameters of the drive wheel (25) and the driven wheel (28) are connected by a drive belt (29).

8. The modified activated carbon stratified high-efficiency gas filtration device according to claim 1, characterized in that, The front end of the housing (1) is equipped with an inspection door (31).

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