A molecular sieve adsorption catalytic desorption VOC waste gas treatment device

Abstract

The utility model provides a kind of VOC waste gas treatment device of molecular sieve adsorption catalytic desorption, it is related to waste gas treatment technical field, including exhaust port, the inside of exhaust port is provided with three-stage filtration assembly, the three-stage filtration assembly includes filter box, the both sides of the front end of filter box are connected with connecting frame, the outer surface of connecting frame is equipped with slot.The utility model in, when carrying out exhaust, small particle screen and large particle screen in filter box will first filter the particulate impurities and oil mist in waste gas, finally again through molecular sieve screen body to carry out last stage process, reach the purpose of triple filtration, simultaneously, filter box is fixed in the inside of exhaust port by the mode that spring promotes insert block, when filter box is disassembled and cleaned, also more convenient, avoid the particulate matter such as dust, oil mist and other impurities carried in waste gas directly deposit in molecular sieve screen body surface or pore structure, affect the service life of molecular sieve screen body problem.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a VOC waste gas treatment device based on molecular sieve adsorption and catalytic desorption. Background Technology

[0002] Waste gas treatment is a key link in environmental protection and sustainable industrial development. It aims to reduce or eliminate harmful gases emitted during industrial production, energy use and other processes through technological means, thereby protecting the atmospheric environment and human health.

[0003] As disclosed in announcement number CN213286363U, a VOC waste gas treatment device using molecular sieve adsorption and catalytic desorption includes a furnace body with a placement plate fixedly connected to one side of the furnace body. This VOC waste gas treatment device using molecular sieve adsorption and catalytic desorption achieves good treatment effect, solving the problem of poor general waste gas treatment effect. The waste gas generated by combustion inside the furnace body is discharged into the filter pipe due to the high pressure inside the furnace. The molecular sieve inside the filter pipe can adsorb harmful substances in the waste gas, while the gas generated by the exhaust mechanism increases the gas flow inside the return gas pipe, allowing the filtered gas to pass through a one-way valve in one direction and then enter the furnace. The gas entering the furnace assists combustion in the space above the partition plate through the ventilation holes, effectively utilizing the filtered gas for repeated filtration, preventing incompletely filtered gas from being discharged into the air and affecting the environment, effectively protecting people's living environment and meeting the user's needs.

[0004] This patent allows for the filtration of exhaust gas, which can then be used for combustion support. However, existing filtration methods only utilize molecular sieves, lacking a targeted treatment mechanism for particulate matter such as dust and oil mist carried in the exhaust gas. These particles directly deposit on the surface or within the pore structure of the molecular sieve, leading to a decrease in its specific surface area and a sharp reduction in adsorption capacity, significantly shortening the lifespan of the molecular sieve. Utility Model Content

[0005] The purpose of this invention is to address the problem that existing filtration methods rely solely on molecular sieves for filtration, lacking a targeted treatment mechanism for particulate matter such as dust and oil mist carried in exhaust gases. These particles directly deposit on the surface or within the pore structure of the molecular sieve, leading to a decrease in its specific surface area, a sharp reduction in adsorption capacity, and a significant shortening of the molecular sieve's lifespan.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a VOC waste gas treatment device based on molecular sieve adsorption and catalytic desorption, comprising an exhaust port, wherein a three-stage filtration assembly is provided inside the exhaust port;

[0007] The three-stage filtration assembly includes a filter box, with connecting frames connected to both sides of the front end of the filter box. The outer surface of the connecting frames has slots. The front sides of the exhaust port have grooves. The upper and lower ends of the exhaust port near the grooves have threaded holes. A fixing block is fitted inside the groove. The fixing block has a slot inside. Two sets of springs are connected inside the slot. Push rods are inserted into the two sets of springs. Handles are fixedly connected to the rear ends of the two sets of push rods. Push plates are connected to the front ends of the two sets of push rods. Insert blocks are formed on the surface of the push plates.

[0008] Furthermore, the upper and lower ends of the fixing block are connected to side ears, and bolts are inserted into the inside of the side ears. The filter box is equipped with a large particle screen.

[0009] Furthermore, a small particle screen is connected to one side of the large particle screen, and a molecular sieve body is connected to one side of the small particle screen.

[0010] Furthermore, magnets are connected to the outer surfaces of the molecular sieve body, the small particle sieve, and the large particle sieve.

[0011] Furthermore, the bolt passes through the side lug and forms a threaded connection with the threaded hole, the push plate and the spring form an elastic structure, and the surface of the insert block has an oblique opening.

[0012] Furthermore, the position and size of the insert block match the position and size of the slot, and the surface of the fixing block fits against the inner wall of the groove.

[0013] Furthermore, a waste heat recovery component is provided inside the exhaust port, the waste heat recovery component includes a water tank, and a water inlet is connected to the top of one side of the water tank.

[0014] Furthermore, the water tank is internally connected to a branch pipe, and a water level observation port is connected to one side of the front surface of the water tank. A water outlet pipe is connected to one side of the water level observation port.

[0015] Furthermore, a thermometer is connected to the other side of the front end of the water tank, and the vent pipe is S-shaped and installed inside the water tank.

[0016] Furthermore, one end of the bronchus is oriented in the same direction as the exhaust port.

[0017] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0018] 1. In this utility model, during exhaust, the small particle screen and large particle screen in the filter box first filter particulate impurities and oil mist in the exhaust gas, and finally pass through the molecular sieve body for the final stage of filtration, achieving the purpose of triple filtration. At the same time, the filter box is fixed inside the exhaust port by spring-driven inserts, which makes it convenient to disassemble and clean the filter box. This avoids the problem of particulate matter such as dust and oil mist carried in the exhaust gas being directly deposited on the surface or pore structure of the molecular sieve body, affecting the service life of the molecular sieve body.

[0019] 2. In this utility model, water is poured into the water tank through the inlet. After the exhaust gas passes through the filter, some gas will also enter the branch pipe. The high temperature of the gas will heat the water in the water tank, which can meet the water demand of the workshop cleaning equipment in winter and effectively save natural gas costs. Attached Figure Description

[0020] Figure 1 This invention presents a three-dimensional structural schematic diagram of a VOC waste gas treatment device based on molecular sieve adsorption and catalytic desorption.

[0021] Figure 2 This invention presents a three-dimensional structural diagram of a molecular sieve adsorption-catalytic desorption VOC waste gas treatment device from another angle.

[0022] Figure 3 This invention provides a schematic diagram of the exploded structure of the filter box of a VOC waste gas treatment device based on molecular sieve adsorption and catalytic desorption.

[0023] Figure 4 This invention provides a schematic diagram of the groove explosion structure of a VOC waste gas treatment device based on molecular sieve adsorption and catalytic desorption.

[0024] Figure 5 This invention provides a schematic diagram of the fixed block structure of a molecular sieve adsorption-catalytic desorption VOC waste gas treatment device.

[0025] Figure 6 This invention presents a schematic diagram of the cross-sectional structure of the water tank in a VOC waste gas treatment device based on molecular sieve adsorption and catalytic desorption.

[0026] Legend: 1. Exhaust port; 2. Three-stage filtration assembly; 201. Filter box; 202. Connecting frame; 203. Slot; 204. Groove; 205. Threaded hole; 206. Fixing block; 207. Side lug; 208. Bolt; 209. Groove; 210. Spring; 211. Push rod; 212. Handle; 213. Push plate; 214. Insert block; 215. Molecular sieve body; 216. Small particle sieve; 217. Large particle sieve; 218. Magnet; 3. Waste heat recovery assembly; 301. Water tank; 302. Water inlet; 303. Branch pipe; 304. Water level observation port; 305. Water outlet pipe; 306. Thermometer. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0029] Example 1, such as Figure 1 - Figure 5As shown, this utility model provides a VOC waste gas treatment device based on molecular sieve adsorption and catalytic desorption, including an exhaust port 1. A three-stage filtration assembly 2 is installed inside the exhaust port 1. The three-stage filtration assembly 2 includes a filter box 201. Connecting brackets 202 are connected to both sides of the front end of the filter box 201. Slots 203 are formed on the outer surface of the connecting brackets 202. Grooves 204 are formed on both sides of the front end of the exhaust port 1. Threaded holes 205 are formed at the upper and lower ends of the exhaust port 1 near the grooves 204. A fixing block 206 is fitted inside the groove 204. A slot 209 is formed inside the fixing block 206. Two sets of springs 210 are connected inside the slot 209. Push rods 211 are inserted into the two sets of springs 210. Handles 212 are fixedly connected to the rear ends of the two sets of push rods 211. Push plates 213 are connected to the front ends of the two sets of push rods 211. The push plate 213 has an insert 214 on its surface. The upper and lower ends of the fixing block 206 are connected to side ears 207. Bolts 208 are inserted into the side ears 207. The filter box 201 is equipped with a large particle screen 217. A small particle screen 216 is connected to one side of the large particle screen 217. A molecular sieve body 215 is connected to one side of the small particle screen 216. Magnets 218 are connected to the outer surfaces of the molecular sieve body 215, the small particle screen 216, and the large particle screen 217. The bolts 208 pass through the side ears 207 and form a threaded connection with the threaded hole 205. The push plate 213 and the spring 210 form an elastic structure. The surface of the insert 214 has a bevel. The position and size of the insert 214 match the position and size of the slot 203. The surface of the fixing block 206 fits against the inner wall of the groove 204.

[0030] The effect achieved in Embodiment 1 is that when the equipment exhausts gas through exhaust port 1, the exhaust gas will sequentially pass through the large particle screen 217, small particle screen 216, and molecular sieve body 215 in the filter box 201. The small particle screen 216 and large particle screen 217 filter and adsorb particulate matter such as dust and oil mist carried in the exhaust gas. Finally, the molecular sieve body 215 adsorbs harmful substances in the exhaust gas. When it is necessary to clean each filter screen in the filter box 201, two sets of handles 212 can be pulled outwards simultaneously, so that the handles 212 can drive the push plate 213 to squeeze the spring 210 through the push rod 211, and drive the insert block 214 to be pulled out of the slot 203 of the connecting frame 202. Then, the operator on the other side pulls the connecting frame 202 outwards, so that the connecting frame 202 can be pulled out of the filter box 201. Then, the molecular sieve body 215, small particle screen 216, and large particle screen 215 are removed in sequence. Net 217 can be removed one by one and cleaned. After cleaning, the three sets of filter screens can be placed in one by one and fixed by magnet 218. Then, push filter box 201 and connecting frame 202 into exhaust port 1. Insert block 214 will automatically retract under pressure. When connecting frame 202 and filter box 201 are fully pushed into exhaust port 1, spring 210 will push push plate 213 through its own elasticity to drive insert block 214 into slot 203 to fix connecting frame 202. This realizes quick assembly and disassembly of filter box 201. At the same time, fixing block 206 also has the function of individual disassembly. After long-term use, spring 210 will become loose. Fixing block 206 can be disassembled individually by loosening bolt 208. This avoids the problem of particulate matter such as dust and oil mist carried in exhaust gas being directly deposited on the surface or pore structure of molecular sieve body 215, affecting the service life of molecular sieve body 215.

[0031] Example 2, as Figure 1 and Figure 6 As shown, a waste heat recovery component 3 is installed inside the exhaust port 1. The waste heat recovery component 3 includes a water tank 301. A water inlet 302 is connected to the top of one side of the water tank 301. A branch pipe 303 is connected inside the water tank 301. A water level observation port 304 is connected to one side of the front surface of the water tank 301. A water outlet pipe 305 is connected to one side of the water level observation port 304. A thermometer 306 is connected to the other side of the front of the water tank 301. The branch pipe 303 is S-shaped and installed inside the water tank 301. One end of the branch pipe 303 faces the same direction as the exhaust port 1.

[0032] The effect achieved in Embodiment 2 is that water is poured into the water tank 301 through the inlet 302, and the water level can be observed through the water level observation port 304. After the exhaust gas passes through the three-stage filtration, some of the filtered gas will also enter the branch pipe 303. The high temperature of the gas will heat the water in the water tank 301. The thermometer 306 can monitor the water temperature. After opening the outlet pipe 305, the water demand for cleaning equipment in the workshop during winter can be met. The outlet pipe 305 can be extended according to the actual use, which can effectively save natural gas costs.

[0033] Working principle: During exhaust, the small particle screen 216 and large particle screen 217 in the filter box 201 first filter particulate impurities and oil mist in the exhaust gas. Finally, the gas passes through the molecular sieve body 215 for the final stage of filtration, achieving triple filtration. At the same time, the filter box 201 is fixed inside the exhaust port 1 by the spring 210 pushing the insert 214, which makes it easy to disassemble and clean the filter box 201. This avoids the problem of particulate matter such as dust and oil mist carried in the exhaust gas being directly deposited on the surface or pore structure of the molecular sieve body 215, affecting the service life of the molecular sieve body 215. Water is poured into the water tank 301 through the water inlet 302. After the exhaust gas passes through the filter, some gas will also enter the branch pipe 303. The high temperature of the gas heats the water in the water tank 301, which can meet the water demand for cleaning equipment in the workshop during winter and effectively save natural gas costs.

[0034] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A VOC waste gas treatment device based on molecular sieve adsorption-catalytic desorption, comprising an exhaust port (1), characterized in that: The exhaust port (1) is equipped with a three-stage filter assembly (2); The three-stage filtration assembly (2) includes a filter box (201). Connecting brackets (202) are connected to both sides of the front end of the filter box (201). Slots (203) are provided on the outer surface of the connecting brackets (202). Grooves (204) are provided on both sides of the front end of the exhaust port (1). Threaded holes (205) are provided at the upper and lower ends of the exhaust port (1) near the grooves (204). A fixing block (2) is fitted inside the groove (204). 06), the fixed block (206) has a slot (209) inside, and two sets of springs (210) are connected inside the slot (209). Push rods (211) are inserted into the two sets of springs (210). Handles (212) are fixedly connected to the rear ends of the two sets of push rods (211). Push plates (213) are connected to the front ends of the two sets of push rods (211). Inserts (214) are opened on the surface of the push plates (213).

2. The VOC waste gas treatment device based on molecular sieve adsorption-catalytic desorption according to claim 1, characterized in that: The upper and lower ends of the fixing block (206) are connected to side ears (207), and bolts (208) are inserted into the side ears (207). The filter box (201) is equipped with a large particle screen (217).

3. The VOC waste gas treatment device based on molecular sieve adsorption-catalytic desorption according to claim 2, characterized in that: A small particle screen (216) is connected to one side of the large particle screen (217), and a molecular sieve body (215) is connected to one side of the small particle screen (216).

4. The VOC waste gas treatment device based on molecular sieve adsorption-catalytic desorption according to claim 3, characterized in that: The outer surfaces of the molecular sieve body (215), the small particle sieve (216), and the large particle sieve (217) are all connected to magnets (218).

5. The VOC waste gas treatment device based on molecular sieve adsorption-catalytic desorption according to claim 4, characterized in that: The bolt (208) passes through the side lug (207) and forms a threaded connection with the threaded hole (205). The push plate (213) and the spring (210) form an elastic structure. The surface of the insert (214) is provided with a bevel.

6. The VOC waste gas treatment device based on molecular sieve adsorption-catalytic desorption according to claim 5, characterized in that: The position and size of the insert (214) match the position and size of the slot (203), and the surface of the fixing block (206) fits against the inner wall of the groove (204).

7. The VOC waste gas treatment device based on molecular sieve adsorption-catalytic desorption according to claim 1, characterized in that: The exhaust port (1) is equipped with a waste heat recovery component (3), which includes a water tank (301) and a water inlet (302) connected to the top of one side of the water tank (301).

8. The VOC waste gas treatment device based on molecular sieve adsorption-catalytic desorption according to claim 7, characterized in that: The water tank (301) is internally connected to a vent pipe (303), and a water level observation port (304) is connected to one side of the front surface of the water tank (301). A water outlet pipe (305) is connected to one side of the water level observation port (304).

9. The VOC waste gas treatment device based on molecular sieve adsorption-catalytic desorption according to claim 8, characterized in that: A thermometer (306) is connected to the other side of the front end of the water tank (301), and the vent pipe (303) is S-shaped and installed inside the water tank (301).

10. The VOC waste gas treatment device based on molecular sieve adsorption-catalytic desorption according to claim 9, characterized in that: One end of the bronchus (303) is oriented in the same direction as the exhaust port (1).

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