Energy-saving organic waste gas catalytic purification treatment device and working method thereof

Abstract

The application relates to an energy-saving organic waste gas catalytic purification treatment device and a working method thereof, which comprises a dust and mist removing filter, a dehumidification temperature regulator, a heat exchanger, a preheater, a catalytic reactor and a spraying absorption tower. The catalytic reactor comprises a base, supporting arms, an upper cylinder and a lower cylinder. The base is provided with the supporting arms, and the supporting arms are connected with the upper cylinder and the lower cylinder. An air outlet pipe is arranged at the top center of the upper cylinder, and an outer air inlet pipe is arranged at the bottom center of the lower cylinder. The device integrates a complete process flow from dust and moisture removal to catalytic purification and tail gas deacidification. The core reactor has a self-adaptive adjustment capability, can calmly cope with the sharp fluctuation of waste gas concentration and air volume, and can keep running at a point close to the optimal efficiency through adjustment of the operation mode, whether it is continuous stable production or intermittent production with large peak-valley difference, so that the treatment effect is stable and meets the emission standard.

Description

Technical Field

[0001] This invention relates to the field of waste gas purification and treatment technology, and in particular to an energy-saving catalytic purification and treatment device for organic waste gas and its working method. Background Technology

[0002] Organic waste gas is one of the main pollutants generated during the production processes of industries such as chemical, coating, printing, and pharmaceutical. Its composition is complex and its concentration fluctuates greatly, posing a serious threat to the environment and human health.

[0003] Catalytic combustion is one of the mainstream technologies for treating low-to-medium concentration organic waste gases, but the following prominent problems still exist in practical applications: High energy consumption: Traditional catalytic combustion devices need to preheat the exhaust gas to the catalyst ignition temperature (usually 250-400℃), and in order to maintain the reaction, the entire huge catalyst bed needs to be continuously heated and kept warm. Under intermittent conditions with low exhaust gas concentration and small air volume, this operating mode will cause huge energy waste. Poor operational safety: When the concentration of exhaust gas fluctuates greatly, runaway temperature phenomenon (a sharp increase in the local temperature of the catalyst bed) is likely to occur, leading to catalyst sintering and deactivation or even equipment damage; Maintenance difficulties: Catalysts are usually monolithic structures, and when some areas become deactivated, the entire catalyst needs to be replaced, which is costly; the replacement process requires a complete shutdown and disassembly of the equipment, which is time-consuming and affects production. Insufficient adaptability: Traditional equipment has limited ability to adjust to fluctuations in exhaust gas concentration and air volume, making it difficult to maintain efficient and stable operation over a wide load range; Fluctuations in purification efficiency: Uneven airflow distribution when the load changes can easily lead to airflow short circuits, affecting purification efficiency. Summary of the Invention

[0004] The problem solved by this invention is to provide an energy-saving catalytic purification treatment device for organic waste gas and its working method. The device can automatically adjust the working mode according to the waste gas load, significantly reduce energy consumption at low load, and has the characteristics of modular maintenance, safety and reliability, and strong adaptability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An energy-saving catalytic purification device for organic waste gas includes a dust and mist filter, a dehumidifier and temperature controller, a heat exchanger, a preheater, a catalytic reactor, and a spray absorption tower. The catalytic reactor includes a base, support arms, an upper cylinder, and a lower cylinder. Several support arms are installed on the base and are connected to the upper and lower cylinders. An outlet pipe is installed at the center of the top of the upper cylinder, and an external inlet pipe is installed at the center of the bottom of the lower cylinder. Several fan-shaped catalytic modules are installed between the upper and lower cylinders. Each fan-shaped catalytic module includes a fan-shaped frame and a fan-shaped honeycomb catalyst filled and fixed within the fan-shaped frame. An arc-shaped sealing ring is provided on the outer side of the fan-shaped frame. An annular cover is vertically installed inside the lower cylinder. An inner inlet pipe, which is slidably installed with the external inlet pipe, is installed at the center of the bottom of the annular cover. Several fan-shaped gas hoods are installed on the top of the annular cover and are connected to the fan-shaped frame.

[0006] Preferably, a sealing gasket is provided on the outer side of the fan-shaped frame and the inner side of the arc-shaped sealing ring, and a sealing ring is provided between the outer air intake pipe and the inner air intake pipe.

[0007] Preferably, support rings are installed on the top side of the upper cylinder and the bottom side of the lower cylinder, and the air outlet pipe and the external air inlet pipe pass through the support rings respectively.

[0008] Preferably, a fixed ring plate is installed on the support ring, and several sets of slide rails are installed at equal angles on the fixed ring plate. A slider is slidably installed on the slide rail. The sliders located at the same position on the two fixed ring plates are respectively connected to the ends of the U-shaped arm, and a connecting arm connected to the arc-shaped sealing ring is installed in the middle of the U-shaped arm.

[0009] Preferably, a rotating ring plate is mounted on the bearing between the two fixed ring plates and on the outer side of the support ring, and the rotating ring plate has a plurality of arc-shaped grooves at equal angles. The fixed ring plate has several straight grooves at equal angles that are parallel to the slide rail, and the slider is equipped with a guide rod that passes through the straight grooves and the arc grooves.

[0010] Preferably, a rotating shaft is installed between the two fixed ring plates, and a motor is installed on one of the fixed ring plates. The output end of the motor is connected to the rotating shaft, and rotating teeth are installed at both ends of the rotating shaft, and the rotating teeth mesh with the outer teeth on the outer side of the rotating ring plate.

[0011] Preferably, the annular cover is divided into several air outlet spaces by several partitions arranged at equal angles, and the air outlet spaces correspond to the fan-shaped air cover. A fan-shaped air plate is installed at the bottom of the air outlet space, and several air holes are opened on the fan-shaped air plate. The fan-shaped air plate is connected to the inner air inlet pipe through a control valve. The top of the fan-shaped air hood is adapted to the bottom of the fan-shaped frame, and a sealing ring is provided on the outer side of the top of the fan-shaped air hood.

[0012] Preferably, a plurality of pneumatic cylinders are installed on the bottom side of the lower cylinder and inside the support ring, and the telescopic ends of the pneumatic cylinders are connected to the annular cover.

[0013] A working method for an energy-saving catalytic purification device for organic waste gas, the specific operating steps of which are as follows: Step 1: The organic waste gas first flows through the dust removal and demisting filter and the dehumidifier and temperature controller to complete the pretreatment. Then, the waste gas enters the core of the system and passes through the heat exchanger to recover waste heat and the preheater to precisely heat to the ignition temperature. Finally, it enters the catalytic reactor to undergo the purification reaction. After the reaction, the gas enters the spray absorption tower for deep treatment and finally meets the emission standards. Step Two: During the catalytic reaction, the catalytic reactor switches between high-load and low-load modes based on the waste gas concentration and air volume. In the high-load mode, with high waste gas concentration and large air volume, the pneumatic cylinder lifts the annular cover, ensuring that all fan-shaped gas covers are fully inserted into the bottom of their corresponding fan-shaped frames. All control valves are opened, and the pre-treated waste gas enters through the outer inlet pipe, flows into the annular cover through the inner inlet pipe, and is then evenly distributed to each fan-shaped gas plate. Finally, it is evenly introduced into all the fan-shaped catalytic modules through the fan-shaped gas covers for reaction, and the purified gas is discharged from the outlet pipe. In the low-load mode, with low waste gas concentration and small air volume, the control valves below some of the fan-shaped gas plates are closed. The annular cover only connects to a few fan-shaped catalytic modules with open valves. Waste gas is only introduced into these activated modules for reaction, while most of the other modules remain dormant due to the lack of airflow. This reduces the volume of catalyst requiring preheating and insulation, as well as the airflow channels, thus achieving energy savings. Step 3: When the sector-shaped catalytic module needs to be replaced, the pneumatic cylinder contracts to move the annular cover and sector-shaped gas cover downwards, separating the sector-shaped gas cover from the sector-shaped frame. The motor is started to drive the rotating shaft and rotating teeth to rotate, meshing with the external teeth to drive the rotating ring plate to rotate. The arc groove on the rotating ring plate drives all the sliders to move outwards radially along the slide rail synchronously through the guide rod, moving the sector-shaped catalytic module out from between the upper and lower cylinders. After the target sector-shaped catalytic module is removed and replaced individually, the sector-shaped catalytic module simultaneously enters between the upper and lower cylinders, assembling into a circular catalytic module.

[0014] The beneficial effects of this invention are: A liftable zoned gas distribution system is introduced. Through the linkage between the raising and lowering of the annular hood and the opening and closing of control valves, it can intelligently select to activate all or only some catalytic modules based on the real-time exhaust gas load. In high-load mode, when the exhaust gas concentration is high and the air volume is large, the pneumatic cylinder raises the annular hood, ensuring all the fan-shaped hoods are fully inserted into the bottom of their corresponding fan-shaped frames. All control valves open, and the exhaust gas is evenly introduced into all the fan-shaped catalytic modules for reaction, achieving maximum processing capacity. In low-load mode, when the exhaust gas concentration is low and the air volume is small, the control valves below some of the fan-shaped gas plates can be closed. The annular hood only connects to a few fan-shaped catalytic modules with open valves. The exhaust gas is only introduced into these activated modules for reaction, while most other modules remain dormant due to the lack of airflow. This significantly reduces the volume of catalyst and the area of ​​the airflow channels that require preheating and insulation under low loads, thus avoiding the huge energy waste of traditional units that still need to maintain the temperature of the entire large bed under low loads. Actual measured comprehensive energy-saving effects can reach 30%-50%, especially under intermittent operation or low-load conditions at night, where the energy-saving benefits are particularly significant. High purification efficiency and operational safety are ensured by uniform gas distribution. The fan-shaped gas plate and its pore design ensure that the exhaust gas is evenly distributed to the activated catalyst area in any working mode, avoiding airflow short-circuiting, channeling, or local overload, thus ensuring the stability of catalyst utilization and purification efficiency. The VOCs purification efficiency can be stably maintained above 98%. Zoned control achieves precise anti-overheating. This zoned gas supply mode is itself a highly efficient active safety measure. When the system detects an abnormal rise in the catalyst bed temperature in a certain fan-shaped area, the control system can immediately close the control valve under the corresponding fan-shaped gas plate and finely adjust the pneumatic cylinder to slightly disengage the fan-shaped gas cover, thereby precisely cutting off the high-concentration gas source flowing to the hot spot area. This effectively prevents the catalyst from sintering and deactivating due to local overheating, greatly improving the safety and reliability of system operation. Excellent ease of maintenance and economy; modular design reduces replacement costs; the catalyst is divided into multiple independent fan-shaped catalytic modules. When some catalysts are deactivated due to poisoning, carbon buildup, or sintering, there is no need to replace the entire expensive catalyst bed as in traditional units. Only one or a few failed fan-shaped modules need to be replaced, reducing spare parts costs by 60%-80%. A quick-locking / unlocking mechanism simplifies maintenance operations. Through a motor-driven linkage mechanism of rotating ring plates, guide rods, and sliders, all fan-shaped catalytic modules move radially synchronously. When replacing the catalyst, there is no need for complex tools and extensive manual bolt removal, reducing maintenance manpower and downtime by more than 70%. Online maintenance is supported. Due to the separate design of the upper and lower cylinders and the independent radial fixing method of the modules, catalyst modules can be directly replaced without completely disassembling the large reactor shell while the system is shut down, making the maintenance process simpler and safer. This device integrates a complete process flow from dust removal and dehumidification to catalytic purification and exhaust gas deacidification. Its core reactor has adaptive adjustment capabilities, which can easily cope with drastic fluctuations in exhaust gas concentration and volume. Whether it is continuous and stable production or intermittent production with large peak-valley differences, the system can maintain operation close to the optimal efficiency point by adjusting the operating mode, ensuring stable and compliant emissions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the first internal structure of the present invention; Figure 3 This is a schematic diagram of the second internal structure of the present invention; Figure 4 This is a schematic diagram of the third internal structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the annular cover of the present invention.

[0016] Legend: 1. Base; 2. Support arm; 3. Upper cylinder; 4. Lower cylinder; 5. Air outlet pipe; 6. External air inlet pipe; 7. Fan-shaped frame; 8. Fan-shaped honeycomb catalyst; 9. Arc-shaped sealing ring; 10. Internal air inlet pipe; 11. Annular cover; 12. Partition plate; 13. Fan-shaped gas plate; 14. Air hole; 15. Control valve; 16. Fan-shaped gas hood; 17. Support ring; 18. Fixed ring plate; 19. Slide rail; 20. Slider; 21. U-shaped arm; 22. Connecting arm; 23. Straight groove; 24. Rotating ring plate; 25. Arc-shaped groove; 26. Guide rod; 27. External gear; 28. Motor; 29. ​​Rotating shaft; 30. Rotating gear; 31. Pneumatic cylinder. Detailed Implementation

[0017] The technical solutions of 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.

[0018] Specific implementation examples are given below.

[0019] See Figures 1-5 An energy-saving catalytic purification device for organic waste gas includes a dust and mist filter, a dehumidifier and temperature controller, a heat exchanger, a preheater, a catalytic reactor, and a spray absorption tower. It establishes a complete organic waste gas treatment process chain, forming an integrated solution from pretreatment to deep purification.

[0020] The catalytic reactor includes a base 1, support arms 2, an upper cylinder 3, and a lower cylinder 4. Several support arms 2 are mounted on the base 1, and each support arm 2 is connected to both the upper cylinder 3 and the lower cylinder 4. An outlet pipe 5 is installed at the center of the top of the upper cylinder 3, and an external inlet pipe 6 is installed at the center of the bottom of the lower cylinder 4. Several fan-shaped catalytic modules are installed between the upper cylinder 3 and the lower cylinder 4. Each fan-shaped catalytic module includes a fan-shaped frame 7 and a fan-shaped honeycomb catalyst 8 filled and fixed within the fan-shaped frame 7. An arc-shaped sealing ring 9 is provided on the outer side of the fan-shaped frame 7. Sealing gaskets are provided on the outer side of the fan-shaped frame 7 and the inner side of the arc-shaped sealing ring 9. Support rings 17 are installed on the top side of the upper cylinder 3 and the bottom side of the lower cylinder 4. The air outlet pipe 5 and the external air inlet pipe 6 pass through the support rings 17 respectively. A fixing ring plate 18 is installed on the support ring 17. Several sets of slide rails 19 are installed at equal angles on the fixing ring plate 18, and sliders 20 are slidably installed on the slide rails 19. The sliders 20 located at the same position on the two fixing ring plates 18 are respectively connected to the ends of the U-shaped arms 21. The U-shaped arm 21 has a connecting arm 22 connected to the arc-shaped sealing ring 9 in the middle. A rotating ring plate 24 is installed between the two fixed ring plates 18 and on the outer side of the support ring 17. The rotating ring plate 24 has several arc-shaped grooves 25 at equal angles. The fixed ring plate 18 has several straight grooves 23 at equal angles parallel to the slide rail 19. A guide rod 26 is installed on the slider 20, passing through the straight grooves 23 and the arc-shaped grooves 25. A rotating shaft 29 is installed between the two fixed ring plates 18. A motor 28 is installed on one of the fixed ring plates 18. The output end of the motor 28 is connected to the rotating shaft 29. Rotating teeth 30 are installed at both ends of the rotating shaft 29, and the rotating teeth 30 mesh with the outer teeth 27 on the outer side of the rotating ring plate 24. The whole catalyst is divided into multiple independent fan-shaped catalyst modules, which supports partition replacement and avoids the huge waste caused by traditional whole replacement. It significantly reduces the material cost of long-term operation. The arc-shaped sealing ring 9 and the sealing gasket form a radial seal between the modules and form a reliable axial seal with the upper cylinder 3 and the lower cylinder 4. This multi-stage sealing design effectively prevents exhaust gas short-circuiting, ensuring that all airflow must pass through the catalyst, thus guaranteeing purification efficiency. In the linkage locking mechanism, the motor 28 drives the rotating ring plate 24 to rotate. Through the cooperation of the arc groove 25 and the guide rod 26, the rotational motion is converted into the synchronous radial linear motion of all sliders 20, realizing the synchronous pressing or releasing of all sector modules. This greatly simplifies maintenance operations, transforming the originally tedious bolt disassembly and assembly into a one-button automated operation, significantly shortening maintenance downtime and improving maintenance safety and convenience.

[0021] An annular cover 11 is installed inside the lower cylinder 4. Several pneumatic cylinders 31 are installed on the bottom side of the lower cylinder 4 and inside the support ring 17, and the telescopic ends of the pneumatic cylinders 31 are connected to the annular cover 11. An inner air inlet pipe 10 is installed at the bottom center of the annular cover 11 and is slidably installed with the outer air inlet pipe 6. A sealing ring is provided between the outer air inlet pipe 6 and the inner air inlet pipe 10. Several fan-shaped air covers 16 are installed on the top of the annular cover 11, and the fan-shaped air covers 16 are connected to the fan-shaped frame 7. Several pneumatic cylinders 31 are installed inside the annular cover 11. Equally angled partitions 12 divide the space into several air outlet spaces, each corresponding to a fan-shaped air hood 16. A fan-shaped air disc 13 is installed at the bottom of each air outlet space, and several air holes 14 are provided on the fan-shaped air disc 13. The fan-shaped air disc 13 is connected to the inner air inlet pipe 10 via a control valve 15. The top of the fan-shaped air hood 16 is fitted to the bottom of the fan-shaped frame 7, and a sealing ring is provided on the outer side of the top of the fan-shaped air hood 16. The overall lifting and lowering of the annular cover 11 and the fan-shaped air hood 16 is controlled by a pneumatic cylinder 31. Combined with the control valves 15 of each zone, the system can intelligently select to activate all or only some of the fan-shaped catalytic modules according to the real-time exhaust gas load. The independent gas path design of each zone is separated by partitions 12. Each fan-shaped gas plate 13 is independently controlled and precisely docked with the fan-shaped gas hood 16 to ensure uniform airflow distribution within the activation area. It also has effective anti-overheating measures. When the temperature of a certain zone is abnormal, the corresponding control valve 15 can be immediately closed and the gas hood contact in that area can be reduced to precisely cut off the high-temperature gas source and prevent local sintering of the catalyst. The inner air inlet pipe 10 and the outer air inlet pipe 6 are slidably connected and equipped with a sealing ring, so that the air inlet pipe remains connected and sealed during the raising and lowering of the annular cover 11, ensuring continuous and stable gas path without leakage risk. The fan-shaped gas plate 13 and its air holes 14 form a pre-distribution structure, which can evenly disperse the exhaust gas from the main pipe onto the corresponding cross-section of the fan-shaped gas hood 16, so that the exhaust gas can pass through the catalyst bed evenly, avoiding excessively high or low local flow rates and optimizing reaction efficiency.

[0022] Working Principle: Organic waste gas first flows through a dust and mist filter and a dehumidifier / temperature regulator for pretreatment. Then, the waste gas enters the core of the system, sequentially passing through a heat exchanger to recover waste heat, and a preheater to precisely heat it to the ignition temperature. Finally, it enters the catalytic reactor for purification. After the reaction, the gas enters a spray absorption tower for further treatment, ultimately meeting emission standards. During the catalytic reaction, the catalytic reactor switches between high-load and low-load modes based on the waste gas concentration and air volume. In the high-load mode, with high waste gas concentration and large air volume, the pneumatic cylinder 31 lifts the annular hood 11, ensuring all fan-shaped gas hoods 16 are fully inserted into the bottom of their corresponding fan-shaped frames 7. All control valves 15 open, and the pretreated waste gas enters through the outer inlet pipe 6, flows into the annular hood 11 through the inner inlet pipe 10, and is then evenly distributed to each fan-shaped gas plate 13. Finally, it is evenly introduced into all the fan-shaped catalytic modules through the fan-shaped gas hoods 16 for reaction, and the purified gas is discharged from the outlet pipe 5. In the low-load mode, with low waste gas concentration and small air volume... The control valve 15 below the fan-shaped gas plate 13 is closed, and the annular cover 11 only connects with a few fan-shaped catalytic modules whose valves are still open. The exhaust gas is only introduced into these activated modules for reaction, while most of the other modules are in a dormant state due to the lack of airflow. This reduces the volume of catalysts that need preheating and insulation, as well as the airflow channels, thus achieving energy saving. When the fan-shaped catalytic module needs to be replaced, the pneumatic cylinder 31 retracts to move the annular cover 11 and the fan-shaped gas cover 16 downwards, separating the fan-shaped gas cover 16 from the fan-shaped frame 7. The motor 28 is started, driving the rotating shaft 29 and the rotating gear 30 to rotate. The rotating ring plate 24 is rotated by meshing with the external gear 27. The arc groove 25 on the rotating ring plate 24 drives all the sliders 20 to move outwards radially along the slide rail 19 synchronously through the guide rod 26, causing the fan-shaped catalytic module to move out from between the upper cylinder 3 and the lower cylinder 4. After the target fan-shaped catalytic module is removed and replaced individually, the fan-shaped catalytic module simultaneously enters between the upper cylinder 3 and the lower cylinder 4, forming a circular catalytic module.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An energy-saving catalytic purification device for organic waste gas, characterized in that, The system includes a dust and mist filter, a dehumidifier and temperature controller, a heat exchanger, a preheater, a catalytic reactor, and a spray absorption tower. The catalytic reactor includes a base (1), support arms (2), an upper cylinder (3), and a lower cylinder (4). Several support arms (2) are installed on the base (1), and all support arms (2) are connected to the upper cylinder (3) and the lower cylinder (4). An air outlet pipe (5) is installed at the center of the top of the upper cylinder (3), and an external air inlet pipe (6) is installed at the center of the bottom of the lower cylinder (4). A pipe is installed between the upper cylinder (3) and the lower cylinder (4). There are several fan-shaped catalytic modules, each including a fan-shaped frame (7) and a fan-shaped honeycomb catalyst (8) filled and fixed in the fan-shaped frame (7). An arc-shaped sealing ring (9) is provided on the outside of the fan-shaped frame (7). An annular cover (11) is installed in the lower cylinder (4). An inner air inlet pipe (10) is installed at the bottom center of the annular cover (11) and is slidably installed with the outer air inlet pipe (6). Several fan-shaped gas covers (16) are installed on the top of the annular cover (11), and the fan-shaped gas covers (16) are connected to the fan-shaped frame (7).

2. The energy-saving catalytic purification device for organic waste gas according to claim 1, characterized in that, A sealing gasket is provided on the outer side of the fan-shaped frame (7) and the inner side of the arc-shaped sealing ring (9), and a sealing ring is provided between the outer air intake pipe (6) and the inner air intake pipe (10).

3. The energy-saving catalytic purification device for organic waste gas according to claim 2, characterized in that, Support rings (17) are installed on the top side of the upper cylinder (3) and the bottom side of the lower cylinder (4), and the air outlet pipe (5) and the external air inlet pipe (6) pass through the support rings (17) respectively.

4. The energy-saving catalytic purification device for organic waste gas according to claim 3, characterized in that, A fixed ring plate (18) is installed on the support ring (17). Several sets of slide rails (19) are installed at equal angles on the fixed ring plate (18), and sliders (20) are slidably installed on the slide rails (19). The sliders (20) located at the same position on the two fixed ring plates (18) are respectively connected to the ends of the U-shaped arm (21), and a connecting arm (22) connected to the arc-shaped sealing ring (9) is installed in the middle of the U-shaped arm (21).

5. The energy-saving catalytic purification device for organic waste gas according to claim 4, characterized in that, A rotating ring plate (24) is mounted on a bearing between the two fixed ring plates (18) and on the outside of the support ring (17). The rotating ring plate (24) has several arc-shaped grooves (25) at equal angles. The fixed ring plate (18) has several straight grooves (23) at equal angles that are parallel to the slide rail (19), and the slider (20) is equipped with a guide rod (26) that passes through the straight groove (23) and the arc groove (25).

6. The energy-saving catalytic purification device for organic waste gas according to claim 5, characterized in that, A rotating shaft (29) is installed between the two fixed ring plates (18). A motor (28) is installed on one of the fixed ring plates (18). The output end of the motor (28) is connected to the rotating shaft (29). Rotating teeth (30) are installed at both ends of the rotating shaft (29), and the rotating teeth (30) mesh with the outer teeth (27) on the outside of the rotating ring plate (24).

7. The energy-saving catalytic purification device for organic waste gas according to claim 6, characterized in that, The annular cover (11) is divided into several air outlet spaces by several partitions (12) arranged at equal angles, and the air outlet spaces correspond to the fan-shaped air cover (16). A fan-shaped air plate (13) is installed at the bottom of the air outlet space, and several air holes (14) are opened on the fan-shaped air plate (13). The fan-shaped air plate (13) is connected to the inner air inlet pipe (10) through a control valve (15). The top of the fan-shaped air hood (16) is adapted to the bottom of the fan-shaped frame (7), and a sealing ring is provided on the outer side of the top of the fan-shaped air hood (16).

8. The energy-saving catalytic purification device for organic waste gas according to claim 7, characterized in that, Several pneumatic cylinders (31) are installed on the bottom side of the lower cylinder (4) and inside the support ring (17), and the telescopic end of the pneumatic cylinder (31) is connected to the annular cover (11).

9. The working method of the energy-saving catalytic purification treatment device for organic waste gas according to claim 8, characterized in that, The specific operational steps of this working method are as follows: Step 1: The organic waste gas first flows through the dust removal and demisting filter and the dehumidifier and temperature controller to complete the pretreatment. Then, the waste gas enters the core of the system and passes through the heat exchanger to recover waste heat and the preheater to precisely heat to the ignition temperature. Finally, it enters the catalytic reactor to undergo the purification reaction. After the reaction, the gas enters the spray absorption tower for deep treatment and finally meets the emission standards. Step 2: During the catalytic reaction, the catalytic reactor switches between high-load and low-load modes based on the waste gas concentration and air volume. In the high-load mode with high waste gas concentration and large air volume, the pneumatic cylinder (31) lifts the annular cover (11), so that all the fan-shaped gas covers (16) are fully inserted into the bottom of the corresponding fan-shaped frame (7). All control valves (15) are opened, and the pre-treated waste gas enters from the outer inlet pipe (6), flows into the annular cover (11) through the inner inlet pipe (10), and is then evenly distributed to each fan-shaped gas plate (13). The gas is uniformly introduced into all the fan-shaped catalytic modules through the fan-shaped gas hood (16) for reaction. The purified gas is discharged from the gas outlet pipe (5). In the low-load mode with low exhaust gas concentration and small air volume, the control valve (15) below some of the fan-shaped gas discs (13) is closed. The annular cover (11) only connects with a few fan-shaped catalytic modules that still have open valves. The exhaust gas is only introduced into these activated modules for reaction. Most of the other modules are in a dormant state because there is no airflow. This reduces the volume of catalyst and airflow channels that need to be preheated and kept warm, thus achieving energy saving. Step 3: When the fan-shaped catalytic module needs to be replaced, the pneumatic cylinder (31) contracts to move the annular cover (11) and the fan-shaped gas cover (16) downward, separating the fan-shaped gas cover (16) from the fan-shaped frame (7). The motor (28) is started to drive the rotating shaft (29) and the rotating tooth (30) to rotate, meshing with the external tooth (27) to drive the rotating ring plate (24) to rotate. The arc groove (25) on the rotating ring plate (24) drives all the sliders (20) to move outward radially along the slide rail (19) through the guide rod (26), driving the fan-shaped catalytic module to move out from between the upper cylinder (3) and the lower cylinder (4). After the target fan-shaped catalytic module is removed and replaced separately, the fan-shaped catalytic module simultaneously enters between the upper cylinder (3) and the lower cylinder (4) to form a circular catalytic module.

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