Large-air-volume low-concentration VOC (volatile organic compound) combustion catalysis system

Abstract

The invention discloses a large-air-volume low-concentration VOC combustion catalysis system, and relates to the technical field of VOC waste gas treatment.The large-air-volume low-concentration VOC combustion catalysis system comprises a bottom plate, a water storage tank is fixedly connected to the top of the bottom plate, a water adding hopper is fixedly connected to the top of the water storage tank, and a water outlet pipe is fixedly connected to the outer surface of the water storage tank; the filtering assembly is fixedly connected to the top of the bottom plate, the filtering assembly comprises a filtering box, an air inlet pipe is fixedly connected to the outer surface of the filtering box, a separation frame is fixedly connected to the inner surface of the filtering box, and a filtering net is arranged on the inner surface of the separation frame. According to the waste gas treatment device, combustion hot gas in the combustion tank passes through the preheating water tank when being exhausted, the purpose of utilizing heat can be achieved, the heat generated by the combustion tank is input into the preheating water tank to complete preheating treatment on waste gas, the combustion efficiency in the combustion tank is improved, and meanwhile energy consumption is saved through cyclic utilization of heat energy.

Description

Technical Field

[0001] The invention relates to the technical field of VOC waste gas treatment, and in particular to a large-air-volume and low-concentration VOC combustion catalytic system. Background Art

[0002] VOC waste gas refers to waste gas emissions containing volatile organic compounds, which can come from industrial production processes, automobile exhaust, printing, painting, solvent use, etc.

[0003] In the prior art, for the treatment of large-volume, low-concentration VOC waste gas, the exhaust gas intake speed is relatively fast and the combustible gas content in the exhaust gas is relatively low. Therefore, after the exhaust gas is sent into the combustion chamber, it takes a long time to heat the exhaust gas. Therefore, a large amount of energy is required to ignite the exhaust gas for combustion catalysis, resulting in a high exhaust gas treatment cost.

[0004] Therefore, we proposed a large air volume and low concentration VOC combustion catalytic system to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a large air volume and low concentration VOC combustion catalytic system to solve the problem raised in the above background technology that a large amount of energy is required to ignite the exhaust gas for combustion catalysis, resulting in high exhaust gas treatment costs.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A large air volume and low concentration VOC combustion catalytic system, comprising: a bottom plate, a water storage tank is fixedly connected to the top of the bottom plate, a water adding hopper is fixedly connected to the top of the water storage tank, and a water outlet pipe is fixedly connected to the outer surface of the water storage tank; a filter assembly, the filter assembly is fixedly connected to the top of the bottom plate, the filter assembly includes a filter box, an air inlet pipe is fixedly connected to the outer surface of the filter box, a partition frame is fixedly connected to the inner surface of the filter box, and a filter screen is arranged on the inner surface of the partition frame; a preheating assembly, the preheating assembly is fixedly connected to the top of the bottom plate, the preheating assembly includes a preheating water tank, a cover plate is fixedly connected to the top of the preheating water tank, a first air supply pipe is fixedly connected to the outer surface of the preheating water tank, a preheating pipe is fixedly connected to the inner surface of the preheating water tank, and a second air supply pipe is fixedly connected to the outer surface of the other side of the preheating water tank; a combustion assembly, the combustion assembly is fixedly connected to the top of the bottom plate, the combustion assembly includes a bracket, a combustion pot is fixedly connected to the top of the bracket, and a sealing cover is fixedly connected to the outer surface of the combustion pot.

[0007] Preferably, the outer surface of the partition frame fits with the inner surface of the filter box, the outer surface of the filter screen fits with the inner surface of the partition frame, the air inlet pipe is located below the filter screen, and the filter box is connected to the first air supply pipe.

[0008] Preferably, a connecting pipe is fixedly connected to the top of the filter box, a connecting vessel is fixedly connected to the end face of the connecting pipe, a plurality of atomizing nozzles are evenly fixedly connected to the bottom of the connecting vessel, the atomizing nozzles are connected to the connecting pipe, and the atomizing nozzles are located on the upper side of the filter.

[0009] Preferably, a water pump is fixedly connected to the top of the filter box, a water supply pipe is fixedly connected to the output end of the water pump, the water supply pipe is connected to the connecting pipe, and the input end of the water pump is fixedly connected to the water outlet pipe.

[0010] Preferably, the second air supply pipe is connected to the combustion tank, the first air supply pipe and the second air supply pipe are connected to the preheating pipe, an exhaust pipe is fixedly connected to the outer surface of the preheating water tank, and a first solenoid valve is arranged inside the exhaust pipe.

[0011] Preferably, a heating pipe is fixedly connected to the outer surface of the combustion tank, a second solenoid valve is arranged inside the heating pipe, and the heating pipe is connected to the preheating water tank.

[0012] Preferably, the outer surface of the sealing cover is fixedly connected to a side frame, the outer surface of the side frame is fixedly connected to a motor, the output end of the motor slides through the side frame, and the output end of the motor is fixedly connected to a rotating shaft.

[0013] Preferably, a drive shaft is symmetrically penetrated and slidably connected to the outer surface of the sealing cover, and two end faces of the drive shaft are fixedly connected to gears, the two gears are meshingly connected, the gears are located outside the sealing cover, and the end face of the rotating shaft is fixedly connected to one of the gears.

[0014] Preferably, a fixing disk is symmetrically fixedly connected to the outer surface of the driving shaft, the fixing disk is located inside the combustion tank, and a plurality of frames are evenly fixedly connected between two fixing disks.

[0015] Preferably, telescopic rods are symmetrically fixedly connected to the inner surfaces of both sides of the frame, springs are sleeved on the outer surfaces of the multiple telescopic rods, clamps are fixedly connected between the end faces of the two groups of telescopic rods, grooves are provided on the outer surfaces of the adjacent sides of the two clamps, and a catalyst is arranged between the inner surfaces of the two grooves.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the VOC waste gas is subjected to combustion catalytic treatment, the waste gas after impurity interception and filtration and harmful substance purification and adsorption will be discharged into the preheating water tank through the first air supply pipe. After entering, the waste gas will flow through the preheating pipe. The preheating pipe is set in a bent shape to slow down the air flow speed. At the same time, the waste gas in the pipe and the hot water inside the preheating water tank have a larger contact area. The hot water can evenly contact the preheating pipe to complete the heat exchange with the waste gas, and the preheating treatment of the waste gas is completed. By setting the preheating water tank when the hot gas from the combustion tank is exhausted, the heat can be utilized. The heat generated by the combustion tank itself is input into the preheating water tank to complete the preheating treatment of the waste gas. While improving the combustion efficiency in the combustion tank, energy consumption is saved by recycling heat energy.

[0018] 2. Start the motor while combustion is occurring. The motor can drive the gears to rotate. When one of the gears rotates to drive the connected drive shaft, the adjacent meshing drive shaft will rotate in the opposite direction. By setting up the two sets of catalysts to rotate in the opposite direction inside the combustion tank, the various components in the exhaust gas can be broken up and mixed, so that the exhaust gas and the catalyst are in uniform contact, which improves the use efficiency of the catalyst. At the same time, it improves the combustion efficiency and reduces the energy consumption of the combustion tank.

[0019] 3. The catalyst is supported by telescopic rods and springs on the inner side of the frame. When the catalyst needs to be replaced, the clamping plates on both sides are opened and the catalyst can be clamped inside the slots on both sides, which makes the catalyst replacement operation convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of a large air volume and low concentration VOC combustion catalytic system of the present invention;

[0021] Figure 2 It is a side view of a large air volume and low concentration VOC combustion catalytic system of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a filter assembly of a large air volume and low concentration VOC combustion catalytic system of the present invention;

[0023] Figure 4 This is a cross-sectional view of the filter box structure of a large air volume and low concentration VOC combustion catalytic system of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of a preheating component of a large air volume and low concentration VOC combustion catalytic system of the present invention;

[0025] Figure 6 This is a schematic diagram of the combustion component structure of a large air volume and low concentration VOC combustion catalytic system of the present invention;

[0026] Figure 7 This is a schematic diagram of the combustion component structure of a large air volume and low concentration VOC combustion catalytic system of the present invention;

[0027] Figure 8 The present invention is a schematic diagram of the catalyst installation structure of a large air volume and low concentration VOC combustion catalytic system.

[0028] In the figure:

[0029] 1. Bottom plate; 2. Filter assembly; 201. Filter box; 202. Air inlet pipe; 203. Partition frame; 204. Filter screen; 205. Connecting pipe; 206. Connecting vessel; 207. Atomizing nozzle; 208. Water supply pipe; 209. Water pump; 3. Preheating assembly; 301. Preheating water tank; 302. Cover plate; 303. First air supply pipe; 304. Preheating pipe; 305. Second air supply pipe; 306. Exhaust pipe; 307. First solenoid valve; 4. , combustion assembly; 401, bracket; 402, combustion tank; 403, heating tube; 404, second solenoid valve; 405, sealing cover; 406, side frame; 407, motor; 408, rotating shaft; 409, gear; 410, driving shaft; 411, fixed plate; 412, frame; 413, telescopic rod; 414, spring; 415, splint; 416, slot; 417, catalyst; 5, water tank; 6, water adding bucket; 7, water outlet pipe. DETAILED DESCRIPTION

[0030] 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 implementation regulations described 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.

[0031] See also Figure 1-Figure 8The present invention provides a technical solution: a large air volume and low concentration VOC combustion catalytic system, comprising: a bottom plate 1, a water storage tank 5 is fixedly connected to the top of the bottom plate 1, a water adding bucket 6 is fixedly connected to the top of the water storage tank 5, and a water outlet pipe 7 is fixedly connected to the outer surface of the water storage tank 5; a filter component 2, the filter component 2 is fixedly connected to the top of the bottom plate 1, the filter component 2 includes a filter box 201, the outer surface of the filter box 201 is fixedly connected to the air inlet pipe 202, the inner surface of the filter box 201 is fixedly connected to the partition frame 203, and the inner surface of the partition frame 203 is provided with a filter screen 204; a preheating component 3, the preheating component 3 is fixed Connected to the top of the base plate 1, the preheating component 3 includes a preheating water tank 301, a cover plate 302 is fixedly connected to the top of the preheating water tank 301, a first air supply pipe 303 is fixedly connected to the outer surface of the preheating water tank 301, a preheating pipe 304 is fixedly connected to the inner surface of the preheating water tank 301, and a second air supply pipe 305 is fixedly connected to the outer surface of the other side of the preheating water tank 301; a combustion component 4, the combustion component 4 is fixedly connected to the top of the base plate 1, the combustion component 4 includes a bracket 401, a combustion pot 402 is fixedly connected to the top of the bracket 401, and a sealing cover 405 is fixedly connected to the outer surface of the combustion pot 402.

[0032] like Figure 3 and Figure 4 As shown, the outer surface of the partition frame 203 is in contact with the inner surface of the filter box 201, the outer surface of the filter screen 204 is in contact with the inner surface of the partition frame 203, the air inlet pipe 202 is located at the lower side of the filter screen 204, the filter box 201 is connected to the first air supply pipe 303, and after the exhaust gas is discharged from the air inlet pipe 202 into the filter box 201, the dust and impurities in the exhaust gas can be intercepted and filtered through the setting of the filter screen 204, and the filtered exhaust gas is sent into the preheating water tank 301 through the circulation of the first air supply pipe 303.

[0033] like Figure 3 and Figure 4 As shown, a connecting pipe 205 is fixedly connected to the top of the filter box 201, and a communicating vessel 206 is fixedly connected to the end face of the connecting pipe 205. A plurality of atomizing nozzles 207 are evenly and fixedly connected to the bottom of the communicating vessel 206. The atomizing nozzles 207 are connected to the connecting pipe 205, and the atomizing nozzles 207 are located on the upper side of the filter screen 204. When the exhaust gas is discharged into the filter box 201 for interception and filtration, the water pump 209 is started to extract the purified liquid stored in the water tank 5 through the connection of the water outlet pipe 7, and then the purified liquid is pumped into the communicating vessel 206 through the connecting pipe 205 through the connection of the water supply pipe 208, and the purified liquid can be atomized and sprayed out through the atomizing nozzles 207, thereby having the effect of adsorbing and purifying harmful substances in the exhaust gas.

[0034] like Figure 2 and Figure 3As shown, a water pump 209 is fixedly connected to the top of the filter box 201, and a water supply pipe 208 is fixedly connected to the output end of the water pump 209. The water supply pipe 208 is connected to the connecting pipe 205. The input end of the water pump 209 is fixedly connected to the water outlet pipe 7. The setting of the water adding bucket 6 can facilitate the filling of the water storage tank 5.

[0035] like Figure 5 and Figure 6 As shown, the second air supply pipe 305 is connected to the combustion tank 402, the first air supply pipe 303 and the second air supply pipe 305 are connected to the preheating pipe 304, the outer surface of the preheating water tank 301 is fixedly connected with an exhaust pipe 306, and a first solenoid valve 307 is arranged inside the exhaust pipe 306. The exhaust gas after impurity interception and filtration and harmful substance purification and adsorption will be discharged into the preheating water tank 301 through the first air supply pipe 303. After entering, the exhaust gas will flow through the preheating pipe 304. The preheating pipe 304 is set in a bent shape to slow down the air flow speed. At the same time, the exhaust gas in the pipe can have a larger contact area with the hot water inside the preheating water tank 301. The hot water can evenly contact the preheating pipe 304 to complete heat exchange with the exhaust gas, thereby completing the preheating treatment of the exhaust gas.

[0036] like Figure 5 and Figure 6 As shown, a heating pipe 403 is fixedly connected to the outer surface of the combustion tank 402, and a second solenoid valve 404 is arranged inside the heating pipe 403. The heating pipe 403 is connected to the preheating water tank 301. After the exhaust gas is preheated, it is input into the combustion tank 402 through the second air supply pipe 305. The exhaust gas is catalytically combusted in the combustion tank 402 with the use of a catalyst 417. After the combustion is completed, the second solenoid valve 404 is opened to exhaust gas from the heating pipe 403. The hot gas exhausted from the heating pipe 403 can be input into the preheating water tank 301. The hot gas can be discharged from the exhaust pipe 306 by opening the first solenoid valve 307. By setting the exhaust of the hot gas burned in the combustion tank 402 to pass through the preheating water tank 301, the purpose of utilizing heat can be achieved. The heat generated by the combustion tank 402 itself is input into the preheating water tank 301 to complete the preheating treatment of the exhaust gas. While improving the combustion efficiency in the combustion tank 402, energy consumption is saved by recycling heat energy.

[0037] like Figure 6 and Figure 7 As shown, the outer surface of the sealing cover 405 is fixedly connected to the side frame 406, the outer surface of the side frame 406 is fixedly connected to the motor 407, the output end of the motor 407 slides through the side frame 406, the output end of the motor 407 is fixedly connected to the shaft 408, when the exhaust gas enters the combustion tank 402 for catalytic combustion, the internal catalyst 417 is used for auxiliary combustion, and the motor 407 is started while the combustion is happening, and the starting of the motor 407 can drive the shaft 408 to rotate.

[0038] like Figure 6 and Figure 7 As shown, a driving shaft 410 is symmetrically penetrated and slidably connected to the outer surface of the sealing cover 405, and gears 409 are fixedly connected to the end faces of the two driving shafts 410. The two gears 409 are meshingly connected, and the gears 409 are located outside the sealing cover 405. The end face of the rotating shaft 408 is fixedly connected to one of the gears 409. The rotation of the rotating shaft 408 can drive the gear 409 to rotate. By setting the two gears 409 to be in a meshing state and connected to the two driving shafts 410 respectively, when one of the gears 409 rotates to drive the connected driving shaft 410 to rotate, the meshing driving shaft 410 next to it will rotate in the opposite direction. By setting the two groups of catalysts 417 rotating in the combustion tank 402 in the opposite direction, the various components in the exhaust gas can be broken up and mixed, so that the exhaust gas is in uniform contact with the catalyst 417, thereby improving the use efficiency of the catalyst 417 and achieving the purpose of improving the combustion efficiency, thereby reducing the energy consumption of the combustion tank 402.

[0039] like Figure 8 As shown, a fixed disk 411 is symmetrically fixedly connected to the outer surface of the driving shaft 410, and the fixed disk 411 is located inside the combustion tank 402. A plurality of frames 412 are evenly fixedly connected between the two fixed disks 411. By installing a plurality of groups of catalysts 417 between the fixed disks 411 on both sides, when the driving shaft 410 drives the fixed disk 411 to rotate, the contact area between the catalyst 417 and the exhaust gas is larger, so that the use effect of the catalyst 417 is better.

[0040] like Figure 8 As shown, telescopic rods 413 are symmetrically fixedly connected to the inner surfaces of both sides of the frame 412, and springs 414 are sleeved on the outer surfaces of the multiple telescopic rods 413. A clamping plate 415 is fixedly connected between the end faces of the two groups of telescopic rods 413. A slot 416 is opened on the outer surface of the adjacent side of the two clamping plates 415, and a catalyst 417 is arranged between the inner surfaces of the two slots 416. The catalyst 417 is supported by the telescopic rods 413 and the springs 414 on both sides on the inner side of the frame 412. When the catalyst 417 needs to be replaced, the clamping plates 415 on both sides are pushed apart, and the catalyst 417 can be clamped on the inner sides of the slots 416 on both sides, which makes the replacement operation of the catalyst 417 convenient and quick.

[0041] The use method and working principle of the device: When the VOC waste gas is subjected to combustion catalytic treatment, the waste gas is discharged from the air inlet pipe 202 into the filter box 201. The dust impurities in the waste gas can be intercepted and filtered through the filter screen 204. The filtered waste gas is sent to the preheating water tank 301 through the first air supply pipe 303. While the waste gas is discharged into the filter box 201 for interception and filtration, the water pump 209 is started to extract the purified liquid stored in the water tank 5 through the connection of the water outlet pipe 7. Then, the purified liquid is pumped into the communicating vessel 206 through the connecting pipe 205 through the connection of the water supply pipe 208. The purified liquid can be sprayed out by the atomizing nozzle 207, thereby playing the role of adsorption and purification of harmful substances in the waste gas, completing the impurity interception and filtration. The exhaust gas after interception, filtration and purification and adsorption of harmful substances will be discharged into the preheating water tank 301 through the first air supply pipe 303. After entering, the exhaust gas will circulate through the preheating pipe 304. The preheating pipe 304 is set in a bent shape to slow down the air flow speed. At the same time, the exhaust gas in the pipe and the hot water inside the preheating water tank 301 can have a larger contact area. The hot water can evenly contact the preheating pipe 304 to complete heat exchange with the exhaust gas, and the exhaust gas is preheated. After the exhaust gas is preheated, it is input into the combustion tank 402 through the second air supply pipe 305. The exhaust gas is catalytically burned in the combustion tank 402 with the use of the catalyst 417. After the combustion is completed, the second solenoid valve 404 is opened to exhaust from the heating pipe 403, and the exhaust is discharged from the heating pipe 403. The hot gas can be input into the preheating water tank 301, and the hot gas can be discharged from the exhaust pipe 306 by opening the first solenoid valve 307. The heat can be utilized by passing the exhaust gas from the combustion tank 402 through the preheating water tank 301. The heat generated by the combustion tank 402 itself is input into the preheating water tank 301 to complete the preheating treatment of the exhaust gas. While improving the combustion efficiency in the combustion tank 402, energy consumption is saved by recycling heat energy. When the exhaust gas enters the combustion tank 402 for catalytic combustion, auxiliary combustion is performed by using the internal catalyst 417. At the same time as combustion, the motor 407 is started. The start of the motor 407 can drive the rotating shaft 408 to rotate, and the drive shaft 410 drives the fixed plate 411 to rotate. When the catalyst 417 is in contact with the exhaust gas, the contact area between the catalyst 417 and the exhaust gas is larger, so that the use effect of the catalyst 417 is better. When one of the gears 409 rotates to drive the connected drive shaft 410 to rotate, the adjacent meshing drive shaft 410 will rotate in the opposite direction. By setting the two groups of catalysts 417 to rotate in the opposite direction inside the combustion tank 402, the various components in the exhaust gas can be broken up and mixed, so that the exhaust gas and the catalyst 417 can be evenly contacted, thereby improving the use efficiency of the catalyst 417 and achieving the purpose of improving the combustion efficiency, reducing the energy consumption of the combustion tank 402. The catalyst 417 is supported by the telescopic rods 413 and the springs 414 on both sides of the frame 412. When the catalyst 417 needs to be replaced, the clamping plates 415 on both sides are pushed open.The catalyst 417 can be clamped inside the slots 416 on both sides, so the replacement operation of the catalyst 417 is convenient and quick.

[0042] The wiring diagram of the water pump 209, the first solenoid valve 307, the combustion tank 402, the second solenoid valve 404 and the motor 407 in the present invention is common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring arrangement of the water pump 209, the first solenoid valve 307, the combustion tank 402, the second solenoid valve 404 and the motor 407 will not be explained in detail.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large air volume and low concentration VOC combustion catalytic system, characterized in that: include: A bottom plate (1), the top of the bottom plate (1) being fixedly connected to a water tank (5), the top of the water tank (5) being fixedly connected to a water adding bucket (6), and the outer surface of the water tank (5) being fixedly connected to a water outlet pipe (7); A filter assembly (2), the filter assembly (2) being fixedly connected to the top of the bottom plate (1), the filter assembly (2) comprising a filter box (201), an air intake pipe (202) being fixedly connected to the outer surface of the filter box (201), a partition frame (203) being fixedly connected to the inner surface of the filter box (201), and a filter screen (204) being arranged on the inner surface of the partition frame (203); A preheating component (3), the preheating component (3) being fixedly connected to the top of the base plate (1), the preheating component (3) comprising a preheating water tank (301), the top of the preheating water tank (301) being fixedly connected to a cover plate (302), the outer surface of the preheating water tank (301) being fixedly connected to a first air supply pipe (303), the inner surface of the preheating water tank (301) being fixedly connected to a preheating pipe (304), and the outer surface of the other side of the preheating water tank (301) being fixedly connected to a second air supply pipe (305); A combustion assembly (4), the combustion assembly (4) is fixedly connected to the top of the base plate (1), the combustion assembly (4) comprises a bracket (401), a combustion pot (402) is fixedly connected to the top of the bracket (401), and a sealing cover (405) is fixedly connected to the outer surface of the combustion pot (402).

2. The large air volume and low concentration VOC combustion catalytic system according to claim 1 is characterized by: The outer surface of the partition frame (203) is in contact with the inner surface of the filter box (201), the outer surface of the filter screen (204) is in contact with the inner surface of the partition frame (203), the air inlet pipe (202) is located below the filter screen (204), and the filter box (201) is connected to the first air supply pipe (303).

3. The large air volume and low concentration VOC combustion catalytic system according to claim 1 is characterized in that: A connecting pipe (205) is fixedly connected to the top of the filter box (201); a connecting vessel (206) is fixedly connected to the end surface of the connecting pipe (205); a plurality of atomizing nozzles (207) are evenly fixedly connected to the bottom of the connecting vessel (206); the atomizing nozzles (207) are connected to the connecting pipe (205); and the atomizing nozzles (207) are located above the filter screen (204).

4. The large air volume and low concentration VOC combustion catalytic system according to claim 3 is characterized by: A water pump (209) is fixedly connected to the top of the filter box (201); a water supply pipe (208) is fixedly connected to the output end of the water pump (209); the water supply pipe (208) is connected to the connecting pipe (205); and the input end of the water pump (209) is fixedly connected to the water outlet pipe (7).

5. The large air volume and low concentration VOC combustion catalytic system according to claim 1 is characterized in that: The second air supply pipe (305) is connected to the combustion pot (402), the first air supply pipe (303) and the second air supply pipe (305) are both connected to the preheating pipe (304), an exhaust pipe (306) is fixedly connected to the outer surface of the preheating water tank (301), and a first solenoid valve (307) is arranged inside the exhaust pipe (306).

6. The large air volume and low concentration VOC combustion catalytic system according to claim 1 is characterized by: A heating pipe (403) is fixedly connected to the outer surface of the combustion pot (402), a second solenoid valve (404) is arranged inside the heating pipe (403), and the heating pipe (403) is connected to the preheating water tank (301).

7. The large air volume and low concentration VOC combustion catalytic system according to claim 1 is characterized by: The outer surface of the sealing cover (405) is fixedly connected to a side frame (406), the outer surface of the side frame (406) is fixedly connected to a motor (407), the output end of the motor (407) slides through the side frame (406), and the output end of the motor (407) is fixedly connected to a rotating shaft (408).

8. The large air volume and low concentration VOC combustion catalytic system according to claim 7 is characterized in that: A driving shaft (410) is symmetrically penetrated and slidably connected to the outer surface of the sealing cover (405); the end surfaces of the two driving shafts (410) are fixedly connected to gears (409); the two gears (409) are meshingly connected; the gears (409) are located outside the sealing cover (405); and the end surface of the rotating shaft (408) is fixedly connected to one of the gears (409).

9. The large air volume and low concentration VOC combustion catalytic system according to claim 8 is characterized in that: A fixing disk (411) is symmetrically fixedly connected to the outer surface of the driving shaft (410), the fixing disk (411) is located inside the combustion pot (402), and a plurality of frames (412) are evenly fixedly connected between two fixing disks (411).

10. The large air volume and low concentration VOC combustion catalytic system according to claim 9, characterized in that: Telescopic rods (413) are symmetrically fixedly connected to the inner surfaces of both sides of the frame (412), springs (414) are sleeved on the outer surfaces of the plurality of telescopic rods (413), clamping plates (415) are fixedly connected between the end surfaces of the two groups of telescopic rods (413), and slots (416) are provided on the outer surfaces of the adjacent sides of the two clamping plates (415), and a catalyst (417) is arranged between the inner surfaces of the two slots (416).

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