A multi-stage mixed filtration type organic waste gas adsorption purification system

Abstract

The application discloses a multi-stage mixed filtering type organic waste gas adsorption purification system, which comprises an adsorption tower, a first air extractor and multi-stage adsorption filter layers arranged in the adsorption tower, a desorption tower, a circulating heating fan and a second gas-solid mixer and a second filter screen plate arranged in the desorption tower; the adsorption filter layer comprises a first gas-solid mixer and a first filter screen plate, the first gas-solid mixer is arranged above the corresponding first filter screen plate; the first air extractor is connected with a first exhaust port of a bottom adsorption filter layer, and the first gas-solid mixer is connected with a first discharge port of a next adsorption filter layer; the second gas-solid mixer is arranged above the second filter screen plate; the circulating heating fan is connected with a second exhaust port at the bottom of the desorption tower; a first discharge port of a top adsorption filter layer is connected with the second gas-solid mixer, and a second discharge port above the second filter screen plate is connected with the first gas-solid mixer of a bottom adsorption filter layer.

Description

Technical Field

[0001] This application relates to the field of environmental protection technology, and in particular to a multi-stage mixed filtration type organic waste gas adsorption and purification system. Background Technology

[0002] Volatile organic compounds (VOCs) are a collective term for a class of easily volatile organic compounds, most of which are toxic and can seriously harm human health. Therefore, VOCs in exhaust gases must be treated before being emitted to reduce their harmful effects on the atmosphere.

[0003] Currently, the VOCs (volatile organic compounds) waste gas treatment market primarily utilizes fixed-bed adsorption technology. Regardless of the process route chosen—whether it's activated carbon, carbon fiber, adsorption resin, zeolite molecular sieve, or honeycomb adsorption rotor—the basic form is a fixed-bed structure. However, over long-term use, the drawbacks of fixed-bed adsorption gradually become apparent, hindering the promotion and development of VOCs waste gas treatment processes using this structure. Fixed-bed adsorption technology suffers from the following defects: 1) Adsorption efficiency decreases continuously with increasing usage time, resulting in a short lifespan; 2) Regeneration efficiency is low, and there are safety hazards associated with regeneration technologies; 3) Waste activated carbon and other adsorption packing materials cause secondary pollution; 4) It has poor resistance to shock load variations, leading to unstable fixed-bed adsorption efficiency and inconsistent emission standards; 5) Post-treatment processes are mostly various forms of thermal oxidation, increasing carbon emissions. Summary of the Invention

[0004] This invention provides a multi-stage hybrid filtration type organic waste gas adsorption and purification system, which replaces the existing single static fixed adsorption with dynamic flow adsorption technology, thereby improving the waste gas purification efficiency, increasing the recycling rate of adsorption packing, reducing operating costs, and extending the service life of the purification system.

[0005] In a first aspect, embodiments of the present invention provide a multi-stage hybrid filtration type organic waste gas adsorption and purification system, comprising: an adsorption and purification device and a desorption and regeneration device, wherein:

[0006] The adsorption purification device includes an adsorption tower, a first exhaust fan, and multiple adsorption filter layers arranged in layers within the adsorption tower. Each adsorption filter layer includes a first gas-solid mixer, a first filter screen, a first jet fan, and a first discharge pipe. The first gas-solid mixer includes a first desorption packing input end, an organic waste gas input end, a first mixing output end, and a first non-powered pneumatic impeller. The first gas-solid mixer is positioned above the corresponding first filter screen, and the first mixing output end faces the corresponding first filter screen. The input end of the first exhaust fan is connected to a first exhaust port opened on the adsorption tower wall below the bottom first filter screen. The first discharge port opened on the adsorption tower wall above the first filter screen is connected to the first desorption packing input end of the next layer through the first discharge pipe and the first jet fan. The organic waste gas is fully mixed with the adsorption packing in the first gas-solid mixer and then adsorbed and filtered. The organic waste gas passes through the adsorption packing deposited on the first filter screen and is adsorbed and filtered again, and then passes through each of the adsorption filter layers in sequence.

[0007] The desorption and regeneration device includes a desorption tower, a circulating heating fan, a second discharge pipe, a second jet fan, an organic steam circulating heater, an organic steam circulating pipeline, and a second gas-solid mixer and a second filter plate disposed within the desorption tower. The second gas-solid mixer includes a second desorption packing input end, a saturated packing conveying pipe on the desorption and regeneration device, a second mixing output end, and a second non-powered pneumatic impeller. The second gas-solid mixer is disposed above the second filter plate, and the second mixing output end faces the second filter plate. The input end of the circulating heating fan is connected to a second exhaust port opened on the wall of the desorption tower below the second filter plate. The saturated packing conveying pipe on the desorption and regeneration device is connected to the output end of the circulating heating fan through the organic steam circulating heater and the organic steam circulating pipeline.

[0008] The top first discharge port is connected to the input end of the second desorption packing. The second discharge port on the desorption tower wall above the second filter screen is connected to the input end of the bottom first desorption packing through the second discharge pipe and the second jet fan.

[0009] Optionally, each adsorption filter layer further includes a first guide tube, and the lower adsorption filter layer in two adjacent adsorption filter layers further includes a second guide tube. The input end of the first guide tube is connected to the first mixing output end of the same layer, and the output end of the first guide tube faces the first filter screen of the same layer. The output end of the first guide tube is larger than the input end of the first guide tube. The output end of the second guide tube is connected to the organic waste gas input end of the same layer, and the input end of the second guide tube faces the first filter screen of the upper layer. The input end of the second guide tube is larger than the output end of the second guide tube. Wherein:

[0010] The second guide pipe is used to guide the organic waste gas output from the first gas-solid mixer in the upper layer into the first gas-solid mixer in the same layer;

[0011] The first guide tube is used to guide the powder adsorption particles output from the first gas-solid mixer in the same layer to fall evenly onto the first filter screen in the same layer.

[0012] Optionally, the multi-stage mixed filtration type organic waste gas adsorption and purification system further includes a saturated packing collection, separation, and replenishment device. The input end of the saturated packing collection, separation, and replenishment device is connected to the first discharge port of the top layer, the first output end of the saturated packing collection, separation, and replenishment device is connected to the organic waste gas input end of the top layer, and the second output end of the saturated packing collection, separation, and replenishment device is connected to the input end of the second desorption packing.

[0013] The saturated packing collection, separation, and replenishment device is used to separate the saturated powder adsorbed particles discharged from the top adsorption filter layer from the airflow, send the separated saturated powder adsorbed particles into the desorption tower, and send the separated gas into the top adsorption filter layer.

[0014] Optionally, the first end of the first discharge pipe is connected to the first discharge port of the same layer, the second end of the first discharge pipe is connected to the first desorption packing input end or the second desorption packing input end of the next layer, the output end of the first jet fan is connected to the first discharge pipe of the same layer, and the input end of the first jet fan is connected to the first exhaust port opened below the first filter screen plate of the same layer, wherein:

[0015] The first jet fan is used to discharge the powder adsorbed particles on the first filter screen of the same layer from the adsorption tower through the gas discharged from the corresponding adsorption filter layer, and send them to the first desorption packing input end or the second desorption packing input end of the next layer through the corresponding first discharge pipe.

[0016] Optionally, the first end of the second discharge pipe is connected to the second discharge port, the second end of the second discharge pipe is connected to the input end of the first desorption packing in the bottom layer, the output end of the second jet blower is connected to the second discharge pipe, and the input end of the second jet blower is connected to the first exhaust port in the bottom layer, wherein:

[0017] The second jet fan is used to discharge the powder adsorbed particles on the second filter screen from the desorption tower through the clean gas discharged from the bottom adsorption filter layer, and send them into the first desorption packing input end of the bottom layer through the second discharge pipe.

[0018] Optionally, the desorption and regeneration device further includes an adsorption packing circulation pipe and a third jet fan. The first end of the adsorption packing circulation pipe is connected to the second discharge port, the second end of the adsorption packing circulation pipe is connected to the second desorption packing input end, the output end of the third jet fan is connected to the adsorption packing circulation pipe, and the input end of the third jet fan is connected to the second exhaust port, wherein:

[0019] The third jet fan is used to discharge the powder adsorbed particles on the second filter screen from the desorption tower through the gas discharged through the second exhaust port, and send them to the input end of the second desorption packing through the adsorption packing circulation pipe to realize the circulation heating of the packing and improve the regeneration effect.

[0020] Optionally, the multi-stage mixed filtration type organic waste gas adsorption and purification system further includes the desorption and regeneration device, which also includes a nitrogen purge pipe and a nitrogen regulating valve. The nitrogen purge pipe and the nitrogen regulating valve are connected to an organic vapor circulation pipeline, wherein:

[0021] The nitrogen purging pipe is used to purge the system with nitrogen when the desorption and regeneration device system is started, to replace the air in the system space, and to control the oxygen content of the system within the set standard.

[0022] The nitrogen regulating valve is used to replenish the nitrogen consumed by the system in a timely manner during system operation, regulate the oxygen content in the system, and ensure the safe operation of the system.

[0023] Optionally, the desorption and regeneration device further includes a saturated packing collection, separation, and replenishment device and an organic vapor collection pipeline. A first valve is installed on the organic vapor circulation pipeline, and a second valve is installed on the organic vapor collection pipeline. The first end of the organic vapor circulation pipeline is connected to the output end of the circulating heating fan, and the second end of the organic vapor circulation pipeline is connected to the input end of the organic vapor circulation heater. The output end of the organic vapor circulation heater is connected to the saturated packing conveying pipe on the desorption and regeneration device. The first end of the organic vapor collection pipeline is connected to the output end of the circulating heating fan, and the second end of the organic vapor collection pipeline is connected to a post-treatment device. The saturated packing collection, separation, and replenishment device is connected to the saturated packing conveying pipe on the desorption and regeneration device.

[0024] Optionally, the multi-stage mixed filtration type organic waste gas adsorption and purification system further includes a post-treatment device, which includes: a condensation recovery device, a catalytic combustion device (RCO), or a regenerative thermal oxidizer (RTO), wherein:

[0025] The condensation recovery device is used to condense the gas discharged from the organic vapor collection pipe into a liquid through a multi-stage condenser, and to collect the liquid.

[0026] The catalytic combustion device (RCO) or regenerative thermal combustion device (RTO) is used to oxidize and burn organic waste gas, thereby eliminating the direct pollution of the atmospheric environment by organic waste gas.

[0027] Optionally, the multi-stage hybrid filtration type organic waste gas adsorption and purification system further includes a control device and a gas detection device. The gas detection device is installed below each layer of the first filter screen. The control device is connected to the gas detection device and the first jet fan, wherein:

[0028] The gas detection device is used to detect gas data corresponding to the space below the first filter screen and send the gas data to the control device.

[0029] The control device is used to control the first jet fan in the lower layer to run continuously when the gas data is greater than a preset data threshold, so as to increase the addition ratio of the adsorption packing; and to control the first jet fan in the lower layer to run intermittently when the gas data is less than or equal to the preset data threshold, so as to reduce the addition ratio of the adsorption packing.

[0030] Optionally, the multi-stage mixed filtration type organic waste gas adsorption and purification system further includes a control device, a concentration monitoring instrument, and a temperature monitoring instrument. The concentration monitoring instrument and the temperature monitoring instrument are installed inside the desorption tower. The concentration monitoring instrument, the temperature monitoring instrument, and the organic steam circulation heater are connected to the control device, wherein:

[0031] The concentration monitoring instrument is used to detect the concentration of organic components in the gas inside the desorption tower and send the concentration of organic components to the control device;

[0032] The temperature monitoring instrument is used to detect the temperature of the gas inside the desorption tower and send the temperature to the control device;

[0033] The control device is used to reduce the operating load by lowering the temperature of the organic steam circulation heater when the concentration of the organic component is greater than or equal to a preset concentration and the temperature is greater than or equal to a preset temperature; and to increase the temperature of the organic steam circulation heater to increase the operating load when the concentration of the organic component is less than a preset concentration and the temperature is less than a preset temperature, thereby ensuring the stable operation of the desorption and regeneration device.

[0034] This invention introduces organic waste gas and powder adsorption particles into a gas-solid mixer, which drives a non-powered pneumatic impeller to rotate. Under the rotation of the impeller, the organic waste gas and powder adsorption particles form a mixed airflow that enters the adsorption filter layer. This ensures sufficient contact between the organic waste gas and the powder adsorption particles within the filter layer, significantly increasing the contact area. The powder adsorption particles effectively adsorb the organic components in the waste gas, improving the adsorption efficiency. Under their own gravity, the powder adsorption particles gradually settle onto the filter screen, forming a filter layer of a certain thickness. The organic waste gas, driven by a fan, passes through the filter layer and re-engages with the powder adsorption particles, further adsorbing the organic components and improving the purification effect, ensuring compliance with emission standards. By introducing the organic waste gas into the gas-solid mixer of the top-level adsorption filter layer, and driven by a first fan, the organic waste gas flows from top to bottom through the gas-solid mixers of each adsorption filter layer, entering the corresponding adsorption filter layer, and finally exiting the adsorption tower from the exhaust port. Pure powder adsorption granules are fed into the gas-solid mixer of the bottom adsorption filter layer. After adsorbing the organic waste gas in the bottom adsorption filter layer, the powder adsorption granules fall onto the bottom filter screen and are then fed into the gas-solid mixer of the next adsorption filter layer through the bottom discharge port. The powder adsorption granules pass through the gas-solid mixers of each adsorption filter layer from bottom to top and enter the corresponding adsorption filter layer, finally exiting the adsorption tower from the top discharge port. The higher the purity of the powder adsorption granules in each adsorption filter layer from top to bottom, the stronger the adsorption capacity. Conversely, the lower the concentration of organic components in the organic waste gas in each adsorption filter layer from top to bottom, the easier it is for the powder adsorption granules to adsorb and purify it. When the organic waste gas with the lowest organic component concentration enters the bottom adsorption filter layer, it is adsorbed and purified by the powder adsorption granules with the strongest adsorption capacity. As a result, the concentration of organic components in the organic waste gas is far below the emission standards, improving the purification effect of the organic waste gas. The saturated adsorbed powder particles discharged from the top adsorption filter layer are fed into the gas-solid mixer of the desorption and regeneration unit. High-temperature organic vapor is introduced into the gas-solid mixer of the desorption and regeneration unit, ensuring full contact between the saturated adsorbed powder particles and the high-temperature organic vapor. This allows the organic components in the adsorbed powder particles to evaporate rapidly, improving the desorption efficiency. The desorption and regeneration unit performs high-temperature desorption on the saturated adsorbed powder particles to recover pure adsorbed powder particles, which are then fed into the gas-solid mixer of the bottom adsorption filter layer. This achieves the recycling of adsorbed powder particles, avoiding secondary pollution to the environment and saving on the cost of using adsorbed powder particles. The adsorption purification unit and the desorption and regeneration unit can operate continuously. The entire organic waste gas adsorption purification system has the advantages of low operating and maintenance costs and low regeneration energy consumption, making it easy to promote and use in industrial applications. Attached Figure Description

[0035] Figure 1 This invention provides a schematic diagram of the structure of a multi-stage hybrid waste gas purification system.

[0036] Figure 2 This is a schematic diagram of the adsorption purification device provided by the present invention;

[0037] Figure 3 This is a schematic diagram of the desorption and regeneration device provided by the present invention;

[0038] In the diagram, 10 is the adsorption purification device; 101 is the adsorption tower; 102 is the first gas-solid mixer; 1021 is the organic waste gas input end; 1022 is the first non-powered pneumatic impeller; 1023 is the first desorption packing input end; 1024 is the first mixing output end; 103 is the first filter screen; 104 is the first exhaust fan; 105 is the first exhaust port; 106 is the first discharge port; 107 is the first discharge pipe; 108 is the first jet fan; 109 is the first guide pipe; 110 is the second guide pipe; 111 is the sealing plate; 121 is the top adsorption filter layer; 122 is the second adsorption filter layer; 123 is the third adsorption filter layer; 124 is the bottom adsorption filter layer; 20 is the desorption regeneration device; 201 is the desorption tower; 202 is the second gas-solid mixer; 2021 is the bottom adsorption filter layer. 2022. Saturated packing conveying pipe on the desorption and regeneration device; 2023. Second non-powered pneumatic impeller; 2024. Second desorption packing input end; 2025. Second mixing output end; 203. Second filter screen; 2030. Nitrogen purging pipe; 2031. Nitrogen regulating valve; 204. Circulating heating fan; 205. Second exhaust port; 206. Second discharge port; 207. Second discharge pipe; 208. Second jet fan; 209. Organic vapor circulation heater; 210. Organic vapor circulation pipeline; 211. First valve; 212. Second valve; 213. Organic vapor collection pipeline; 214. Third jet fan; 215. Adsorption packing circulation pipeline; 30. Saturated packing collection, separation, and replenishment device; 40. Post-treatment device; 50. Adsorption packing replenishment device. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0040] like Figures 1-3 As shown, the present invention provides a multi-stage mixed filtration type organic waste gas adsorption and purification system, which aims to adsorb VOCs organic components in waste gas step by step through the multi-stage adsorption units in the adsorption purification device 10, and to recover pure powder adsorption particles by high-temperature desorption of saturated powder adsorption particles through a desorption and recovery device, so as to solve the problems of low adsorption capacity and inability to recycle adsorption materials in existing organic waste gas adsorption and purification systems.

[0041] In this embodiment, the multi-stage hybrid filtration type organic waste gas adsorption purification system includes an adsorption purification device 10 and a desorption regeneration device 20. (Reference) Figure 1 The adsorption purification device 10 includes an adsorption tower 101, a first exhaust fan 104, and a multi-stage adsorption filter layer arranged in layers within the adsorption tower 101. Each adsorption filter layer includes a first gas-solid mixer 102, a first filter screen 103, a first jet fan 108, and a first discharge pipe 107. The first gas-solid mixer 102 includes a first desorption packing inlet 1023, an organic waste gas inlet 1021, a first mixing outlet 1024, and a first non-powered wind-driven impeller 1022. The first gas-solid mixer 102 is positioned above the corresponding first filter screen 103, and the first mixing outlet 1024 faces the corresponding first filter screen 103. The filter screen plate 103; the input end of the first exhaust fan 104 is connected to the first exhaust port 105 opened on the wall of the adsorption tower 101 below the bottom first filter screen plate 103, and the first discharge port 106 opened on the wall of the adsorption tower 101 above the first filter screen plate 103 is connected to the input end 1023 of the first desorption packing of the upper layer through the first discharge pipe 107 and the first jet fan 108; wherein, the organic waste gas is fully mixed with the adsorption packing through the first gas-solid mixer 102 and then adsorbed and filtered, the organic waste gas passes through the adsorption packing deposited on the first filter screen plate 103 and is adsorbed and filtered again, and passes through each of the adsorption and filtration layers in sequence.

[0042] For example, refer to Figure 1Under the action of the first exhaust fan 104, organic waste gas enters the first gas-solid mixer 102 from the organic waste gas inlet 1021 above the first non-powered pneumatic impeller 1022. As the organic waste gas passes through the first non-powered pneumatic impeller 1022, it drives the first non-powered pneumatic impeller 1022 to rotate. Powder adsorption particles enter the first gas-solid mixer 102 from the first desorption packing inlet 1023 on the side of the first non-powered pneumatic impeller 1022. Under the rotation of the first non-powered pneumatic impeller 1022, the powder adsorption particles and organic waste gas are uniformly mixed to form a mixed airflow, which enters the corresponding adsorption filter layer through the first mixing outlet 1024 below the first non-powered pneumatic impeller 1022. In the mixed airflow, the powder adsorption particles come into full contact with the organic waste gas, increasing the contact surface area between the powder adsorption particles and the organic waste gas. This allows the organic components in the organic waste gas to be adsorbed by the micropores in the powder adsorption particles. The organic components enter from the gas phase and are converted into the solid phase to complete the mass transfer reaction, thereby being removed and purified from the organic waste gas. This achieves full adsorption and purification of the organic components in the organic waste gas, improving the adsorption efficiency. Furthermore, after adsorbing the organic waste gas, the powder adsorption particles in the mixed airflow gradually settle onto the first filter screen 103 under their own gravity, forming a filter layer of a certain thickness. Under the action of the first exhaust fan 104, the organic waste gas in the mixed airflow passes through the adsorption filter layer and the first filter screen 103 and enters the first gas-solid mixer 102 of the next adsorption filter layer. When the organic waste gas passes through the filter layer, it comes into contact with the powder adsorption particles in the filter layer again, and the organic components in the organic waste gas are adsorbed again, improving the adsorption efficiency of the organic waste gas. The powder adsorbed particles attached to the organic waste gas are intercepted by the first filter screen 103, ensuring the purity of the gas discharged from the adsorption tower 101 and avoiding waste of the powder adsorbed particles. The powder adsorbed particles accumulated on the first filter screen 103 are discharged from the adsorption filter layer through the first discharge port 106, and are sent to the first gas-solid mixer 102 of the next stage adsorption filter layer or to the desorption and regeneration device 20 through the first discharge pipe 107 and the first jet fan 108.

[0043] In one embodiment, reference Figure 1A sealing plate 111 is provided between two adjacent adsorption filter layers. The first gas-solid mixer 102 of the lower adsorption filter layer is installed on the sealing plate 111. The organic waste gas inlet 1021 of the first gas-solid mixer 102 is located in the upper adsorption filter layer, and the first mixing outlet 1024 is located in the lower adsorption filter layer, so that the organic waste gas enters the adsorption filter layer from the first gas-solid mixer 102. For example, when the first exhaust fan 104 is running, the airflow in the adsorption tower 101 flows from the top to the bottom and is discharged outside the adsorption tower 101. Under the action of the first exhaust fan 104, the organic waste gas discharged by the waste gas device enters the top adsorption filter layer 121 from the first gas-solid mixer 102 of the top adsorption filter layer 121, and then passes through the first gas-solid mixer 102 of each adsorption filter layer from top to bottom into the corresponding adsorption filter layer, and finally exits the adsorption tower 101 from the first exhaust port 105 of the bottom adsorption filter layer 124. The pure powder adsorbed particles conveyed by the desorption and regeneration device 20 enter the bottom adsorption filter layer 124 from the first gas-solid mixer 102 and settle on the first filter screen 103 of the bottom adsorption filter layer 124. In two adjacent adsorption filter layers, the powder adsorbed particles on the first filter screen 103 of the lower adsorption filter layer are discharged from the first discharge port 106 of the same layer and then enter the first gas-solid mixer 102 of the upper adsorption filter layer through the first discharge pipe 107, thus entering the upper adsorption filter layer sequentially from bottom to top. The powder adsorbed particles on the first filter screen 103 of the top adsorption filter layer 121 are conveyed to the desorption and regeneration device 20 from the first discharge port 106 of the top adsorption filter layer 121. This embodiment adopts a single tower with multiple adsorption filter layers arranged vertically, an integrated structural design, a compact purification device, strong overall integrity, and convenient operation and maintenance.

[0044] refer to Figure 1 and Figure 2This embodiment describes an adsorption purification device 10 comprising four adsorption filter layers as an example. From top to bottom, the adsorption filter layers are a top adsorption filter layer 121, a second adsorption filter layer 122, a third adsorption filter layer 123, and a bottom adsorption filter layer 124. The first gas-solid mixer 102 of the top adsorption filter layer 121 is installed at the top of the adsorption tower 101. The first filter screen 103 of the top adsorption filter layer 121 is located below the top first gas-solid mixer 102. The sealing plate 111 of the top adsorption filter layer 121 is located below the first filter screen 103 of the top adsorption filter layer 121. The space between the sealing plate 111 of the top adsorption filter layer 121 and the top of the adsorption tower 101 is the top adsorption filter layer 121. The first gas-solid mixer 102 of the second adsorption filter layer 122 is installed on the sealing plate 111 of the top adsorption filter layer 121. The first filter screen 103 of the second adsorption filter layer 122 is located below the first gas-solid mixer 102 of the second adsorption filter layer 122. The sealing plate 111 of the second adsorption filter layer 122 is located below the second adsorption filter layer 122. The space between the sealing plate 111 of the second adsorption filter layer 122 and the sealing plate 111 of the first adsorption filter layer is the second adsorption filter layer 122. The structure of the third adsorption filter layer 123 and the bottom adsorption filter layer 124 in the adsorption tower 101 is similar and will not be described in detail here. Furthermore, a first discharge port 106 of the second adsorption filter layer 122 is provided above the first filter screen 103 of the second adsorption filter layer 122. The first discharge port 106 of the second adsorption filter layer 122 is connected to the adsorption packing input end of the first gas-solid mixer 102 of the top adsorption filter layer 121 through the first discharge pipe 107 of the second adsorption filter layer 122 and the first jet fan 108. A first discharge port 106 of the third adsorption filter layer 123 is provided above the first filter screen 103 of the third adsorption filter layer 123. The first discharge port 106 of the third adsorption filter layer 123 is connected to the adsorption packing input end of the first gas-solid mixer 102 of the second adsorption filter layer 122 through the first discharge pipe 107 of the third adsorption filter layer 123 and the first jet fan 108. A first discharge port 106 of the bottom adsorption filter layer 124 is provided above the first filter screen 103. The first discharge port 106 of the bottom adsorption filter layer 124 is connected to the adsorption packing input end of the first gas-solid mixer 102 of the second adsorption filter layer 122 through the first discharge pipe 107 of the bottom adsorption filter layer 124 and the first jet fan 108. In order to facilitate the discharge of powder adsorbed particles on the first filter screen 103, the lower edge of the first discharge port 106 is flush with the first filter screen 103.

[0045] For example, organic waste gas enters the first gas-solid mixer 102 of the top adsorption filter layer 121, and forms a mixed airflow with the powder adsorption particles from the second adsorption filter layer 122 conveyed to the first gas-solid mixer 102 of the top adsorption filter layer 121, and then enters the top adsorption filter layer 121. After the powder adsorption particles in the top adsorption filter layer 121 adsorb and purify the organic waste gas, they settle onto the first filter screen 103 of the top adsorption filter layer 121, and are conveyed to the desorption and regeneration device 20 through the first discharge port 106 and the first discharge pipe 107 of the top adsorption filter layer 121. After being adsorbed and purified, the organic waste gas in the top adsorption filter layer 121 enters the first gas-solid mixer 102 of the second adsorption filter layer 122, and forms a mixed airflow with the powder adsorption particles from the third adsorption filter layer 123 conveyed to the first gas-solid mixer 102 of the second adsorption filter layer 122, and then enters the second adsorption filter layer 122. After the organic waste gas in the second adsorption filter layer 122 is adsorbed and purified, the powder adsorption particles settle onto the first filter screen 103 of the second adsorption filter layer 122, and are then transported to the first gas-solid mixer 102 of the top adsorption filter layer 121 through the first discharge port 106 and the first discharge pipe 107 of the second adsorption filter layer 122. The organic waste gas in the second adsorption filter layer 122, after being adsorbed and purified, enters the first gas-solid mixer 102 of the third adsorption filter layer 123, where it forms a mixed airflow with the powder adsorption particles from the bottom adsorption filter layer 124 that are also transported to the first gas-solid mixer 102 of the third adsorption filter layer 123, and then enters the third adsorption filter layer 123. After the organic waste gas in the third adsorption filter layer 123 is adsorbed and purified, the powder adsorption particles settle onto the first filter screen 103 of the third adsorption filter layer 123, and are then transported to the first gas-solid mixer 102 of the second adsorption filter layer 122 through the first discharge port 106 and the first discharge pipe 107 of the third adsorption filter layer 123. After being adsorbed and purified, the organic waste gas in the third adsorption filter layer 123 enters the first gas-solid mixer 102 of the bottom adsorption filter layer 124, where it forms a mixed gas flow with the pure powder adsorption particles transported to the first gas-solid mixer 102 of the bottom adsorption filter layer 124 by the desorption and regeneration device 20. This mixed gas flow then enters the bottom adsorption filter layer 124. After the powder adsorption particles in the bottom adsorption filter layer 124 adsorb and purify the organic waste gas, they settle onto the first filter screen 103 of the bottom adsorption filter layer 124 and are transported to the first gas-solid mixer 102 of the third adsorption filter layer 123 through the first discharge port 106 and the first discharge pipe 107 of the bottom adsorption filter layer 124. The organic waste gas in the bottom adsorption filter layer 124 is then purified and becomes clean gas, which is discharged from the adsorption tower 101 through the first exhaust port 105 of the bottom adsorption filter layer 124.

[0046] In this embodiment, as the organic waste gas passes through each adsorption filter layer from top to bottom, it is adsorbed and purified by the corresponding powder adsorption particles within that layer. Therefore, the lower the concentration of organic components in the organic waste gas from top to bottom, the easier it is for the powder adsorption particles to adsorb and purify it. As the powder adsorption particles pass through each adsorption filter layer from bottom to top, they adsorb and purify the organic waste gas within that layer. Therefore, the higher the purity of the powder adsorption particles in each adsorption filter layer from top to bottom, the stronger their adsorption capacity. The purest powder adsorption particles with the highest adsorption capacity are placed in the bottom adsorption filter layer 124, closest to the first exhaust fan 104, to strictly control the organic waste gas discharged from the adsorption tower 101 by the first exhaust fan 104. Therefore, the concentration of organic components in the gas discharged from the adsorption tower 101 is far below the emission standards, strictly adhering to emission standards and eliminating the impact of organic components on the surrounding environment.

[0047] In this embodiment, the desorption and regeneration device 20 includes a desorption tower 201, a circulating heating fan 204, a second discharge pipe, a second jet fan, an organic vapor circulating heater, an organic vapor circulating pipe, and a second gas-solid mixer 202 and a second filter plate 203 disposed within the desorption tower 201. The second gas-solid mixer 202 includes a second desorption packing inlet 2023, a saturated packing conveying pipe 2021 on the desorption and regeneration device, a second mixing outlet 2024, and a second non-powered wind turbine impeller 2022. The second gas-solid mixer 202 is disposed above the second filter plate 203, and the second mixing outlet 2024 faces the second gas-solid mixer 202. The second filter screen 203; the input end of the circulating heating fan 204 is connected to the second exhaust port 205 opened on the wall of the desorption tower 201 below the second filter screen 203; the saturated packing conveying pipe 2021 on the desorption regeneration device is connected to the output end of the circulating heating fan 204 through the organic steam circulating heater 209 and the organic steam circulating pipe 210; the top first discharge port 106 is connected to the input end 2023 of the second desorption packing, and the second discharge port 206 opened on the wall of the desorption tower 201 above the second filter screen 203 is connected to the input end 1023 of the bottom first desorption packing through the second discharge pipe 207 and the second jet fan 208.

[0048] For example, refer to Figure 1Under the action of the circulating heating fan 204, high-temperature organic steam enters the second gas-solid mixer 202 from the saturated packing conveying pipe 2021 on the side of the desorption and regeneration device of the second non-powered wind turbine impeller 2022. When the high-temperature organic steam passes through the second non-powered wind turbine impeller 2022, it drives the second non-powered wind turbine impeller 2022 to rotate. The saturated powder adsorbed particles discharged from the top adsorption filter layer 121 enter the second gas-solid mixer 202 from the second desorption packing inlet end 2023 above the second non-powered wind turbine impeller 2022. Under the rotation of the second non-powered wind turbine impeller 2022, the powder adsorbed particles and high-temperature organic steam are uniformly mixed to form a mixed airflow, which enters the desorption tower 201 through the second mixed outlet end 2024 below the second non-powered wind turbine impeller 2022. In the mixed airflow, the powder adsorbed particles come into full contact with the high-temperature organic vapor, increasing the contact area between the particles and the vapor. The organic components in the powder adsorbed particles evaporate rapidly upon heating and desorb from the particles, resulting in rapid desorption into pure powder adsorbed particles and improving the desorption efficiency. Furthermore, after desorption, the powder adsorbed particles in the mixed airflow gradually settle onto the second filter plate 203 under their own gravity. Under the action of the circulating heating fan 204, the high-temperature organic vapor in the mixed airflow passes through the second filter plate 203 and the powder adsorbed particles, and is discharged from the desorption tower 201 through the second exhaust port 205. The powder adsorbed particles attached to the high-temperature organic vapor are intercepted by the second filter plate 203, preventing waste of the powder adsorbed particles. The pure powder adsorbed particles on the second filter screen 203 are discharged from the desorption tower 201 through the second discharge port 206, and then sent to the first gas-solid mixer 102 of the bottom adsorption filter layer 124 through the second discharge pipe 207 and the second jet fan 208 for a new round of adsorption and purification, realizing the recycling of the powder adsorbed particles. Similarly, in order to facilitate the discharge of the powder adsorbed particles on the second filter screen 203, the lower edge of the second discharge port 206 is flush with the second filter screen 203. The high-temperature organic steam discharged from the circulating heating fan 204 enters the organic steam circulating heater 209 through the organic steam circulating pipe 210, and is heated in the organic steam circulating heater 209 before being sent to the second gas-solid mixer 202. The organic steam circulating heater 209 repeatedly heats the temperature of the organic steam in the desorption tower 201, which can improve the desorption efficiency in the desorption tower 201. Moreover, the organic steam is repeatedly extracted and fed into the desorption tower 201, which enhances the turbulent flow in the desorption tower 201, improves the mass transfer effect, and shortens the regeneration time of the powder adsorbed particles.

[0049] In one embodiment, reference Figure 2Each adsorption filter layer also includes a first guide pipe 109. The lower adsorption filter layer in two adjacent adsorption filter layers also includes a second guide pipe 110. The input end of the first guide pipe 109 is connected to the first mixing output end 1024 of the same layer, and the output end of the first guide pipe 109 faces the first filter screen 103 of the same layer. The output end of the first guide pipe 109 is larger than its input end. The output end of the second guide pipe 110 is connected to the organic waste gas input end 1021 of the same layer, and the input end of the second guide pipe 110 faces the first filter screen 103 of the upper layer. The input end of the second guide pipe 110 is larger than its output end. Specifically, the second guide pipe 110 is used to guide the organic waste gas output from the first gas-solid mixer 102 of the upper layer into the first gas-solid mixer 102 of the same layer; the first guide pipe 109 is used to guide the powder adsorption particles output from the first gas-solid mixer 102 of the same layer to fall evenly onto the first filter screen 103 of the same layer. For example, the first guide pipe 109 of the top adsorption filter layer 121 is connected to the first mixing output end 1024 of the first gas-solid mixer 102 of the top adsorption filter layer 121, and the first guide pipe 109 of the top adsorption filter layer 121 faces the first filter screen 103 of the top adsorption filter layer 121. Under the action of the first guide pipe 109, the powder adsorption particles in the mixed gas flow output by the first gas-solid mixer 102 of the top adsorption filter layer 121 are evenly deposited on the first filter screen 103 of the top adsorption filter layer 121, ensuring that the powder adsorption particles accumulated on the first filter screen 103 of the top adsorption filter layer 121 maintain a uniform thickness. Organic waste gas will pass through the first filter screen 103 through the path of least resistance. If the powder adsorption particles are evenly distributed on the first filter screen 103, the organic waste gas will pass through a certain thickness of powder adsorption particles, allowing the organic waste gas to come into contact with a certain amount of powder adsorption particles again, thus improving the secondary purification efficiency of the organic waste gas. Furthermore, the second adsorption filter layer 122, the third adsorption filter layer 123, and the bottom adsorption filter layer 124 all include a second guide pipe 110. For example, the second guide pipe 110 of the second adsorption filter layer 122 is connected to the organic waste gas input end 1021 of the first gas-solid mixer 102 of the second adsorption filter layer 122, and the second guide pipe 110 of the second adsorption filter layer 122 faces the first filter screen 103 of the top adsorption filter layer 121. Under the action of the first exhaust fan 104 and the second guide pipe 110, the organic waste gas in the top adsorption filter layer 121 quickly enters the first gas-solid mixer 102 of the second adsorption filter layer 122, which improves the flowability of the organic waste gas in the adsorption tower 101 and is beneficial to improving the gas-solid mass transfer efficiency.

[0050] In one embodiment, reference Figure 1The multi-stage mixed filtration type organic waste gas adsorption and purification system also includes a saturated packing collection, separation, and replenishment device 30. The input end of the saturated packing collection, separation, and replenishment device 30 is connected to the top-level first discharge port 106, the first output end of the saturated packing collection, separation, and replenishment device 30 is connected to the top-level organic waste gas input end 1021, and the second output end of the saturated packing collection, separation, and replenishment device 30 is connected to the second desorption packing input end 2023. The saturated packing collection, separation, and replenishment device 30 is used to separate the powder adsorbed particles discharged from the top-level adsorption filter layer 121 from the airflow, sending the separated saturated powder adsorbed particles into the desorption tower 201. This embodiment separates the organic waste gas from the saturated powder adsorbed particles, avoiding sending the organic waste gas into the desorption tower and affecting the desorption and regeneration of the powder adsorbed particles. The separated organic waste gas is then sent back into the adsorption tower for adsorption and purification, improving the purification effect of the organic waste gas.

[0051] In one embodiment, reference Figure 2The first end of the first discharge pipe 107 is connected to the first discharge port 106 of the same layer, and the second end of the first discharge pipe 107 is connected to the first desorption packing input end 1023 or the second desorption packing input end 2023 of the next layer. The output end of the first jet fan 108 is connected to the first discharge pipe 107 of the same layer, and the input end of the first jet fan 108 is connected to the first exhaust port 105 opened below the first filter screen plate 103 of the same layer. The first jet fan 108 is used to discharge the powder adsorbed particles on the first filter screen plate 103 of the same layer from the adsorption tower 101 through the gas discharged from the corresponding adsorption filter layer, and send them to the first desorption packing input end 1023 or the second desorption packing input end 2023 of the next layer through the corresponding first discharge pipe 107. For example, the first jet fan 108 of the top adsorption filter layer 121, using the gas discharged from the first exhaust port 105 of the top adsorption filter layer 121, sends the powder adsorbed particles on the first filter screen 103 of the top adsorption filter layer 121 into the second gas-solid mixer 202 of the desorption regeneration device 20. The first jet fan 108 of the second adsorption filter layer 122, using the gas discharged from the first exhaust port 105 of the second adsorption filter layer 122, sends the powder adsorbed particles on the first filter screen 103 of the second adsorption filter layer 122 into the first gas-solid mixer 102 of the top adsorption filter layer 121. The first jet fan 108 of the third adsorption filter layer 123, using the gas discharged from the first exhaust port 105 of the third adsorption filter layer 123, sends the powder adsorbed particles on the first filter screen 103 of the third adsorption filter layer 123 into the first gas-solid mixer 102 of the second adsorption filter layer 122. The first jet fan 108 of the bottom adsorption filter layer 124, using the gas discharged from the first exhaust port 105 of the bottom adsorption filter layer 124, sends the powder adsorbed particles on the first filter screen 103 of the bottom adsorption filter layer 124 into the first gas-solid mixer 102 of the third adsorption filter layer 123. In this embodiment, the powder adsorbed particles and the gas output by the first jet fan 108 form an airflow and enter the first gas-solid mixer 102. The airflow acts on the first non-powered wind turbine 1022, causing the first non-powered wind turbine 1022 to rotate violently. The powder adsorbed particles and organic waste gas are rapidly mixed to form a mixed airflow, which then enters the adsorption filter layer, improving the flowability of the airflow in the adsorption tower 101, improving the gas-solid mass transfer efficiency, and stabilizing the overall adsorption efficiency at a high level. Similarly, the powder adsorption particles and the gas output by the first jet fan 108 form an airflow and enter the second gas-solid mixer 202. The airflow acts on the second non-powered wind turbine 2022, causing the second non-powered wind turbine 2022 to rotate violently. The powder adsorption particles and high-temperature organic vapor are rapidly mixed to form a mixed airflow, which then enters the desorption tower 201. This improves the flowability of the airflow in the desorption tower 201, increases the gas-solid mass transfer efficiency, and stabilizes the overall desorption efficiency at a high level.

[0052] In this embodiment, the multi-stage hybrid filtration type organic waste gas adsorption and purification system further includes a control device and a gas detection device. The gas detection device is installed below each layer of the first filter screen 103, and the control device is connected to the gas detection device and the first jet fan 108. The gas detection device is used to detect gas data in the space below the corresponding first filter screen 103 and send the gas data to the control device. The control device is used to control the operation of the lower layer's first jet fan 108 to increase the dosage of the adsorption packing when the gas data is greater than a preset data threshold; and to control the intermittent operation frequency of the lower layer's first jet fan 108 to reduce the dosage of the adsorption packing when the gas data is less than or equal to the preset data threshold. For example, when the gas data of the second adsorption filter layer 122 is greater than a preset data threshold, it indicates that the adsorption capacity of the powder adsorbed particles in the second adsorption filter layer 122 is poor. In this case, the first jet fan 108 of the third adsorption filter layer 123 can be controlled to operate, so as to send the powder adsorbed particles on the first filter screen 103 of the third adsorption filter layer 123 into the second adsorption filter layer 122, thereby enhancing the adsorption capacity of the second adsorption filter layer 122. When the gas data of the second adsorption filter layer 122 is less than or equal to the preset data threshold, it indicates that the adsorption capacity of the powder adsorbed particles in the second adsorption filter layer 122 is strong. In this case, the first jet fan 108 of the third adsorption filter layer 123 can be controlled to operate intermittently, so as to maintain the adsorption capacity of the second adsorption filter layer 122 and reduce the operating power consumption of the first jet fan 108.

[0053] In one embodiment, the first end of the second discharge pipe 207 is connected to the second discharge port 206, the second end of the second discharge pipe 207 is connected to the first desorption packing input end 1023 of the bottom layer, the output end of the second jet fan 208 is connected to the second discharge pipe 207, and the input end of the second jet fan 208 is connected to the first exhaust port 105 of the bottom layer. The second jet fan 208 is used to discharge the powder adsorbed particles on the second filter plate 203 from the desorption tower 201 through the clean gas discharged from the bottom adsorption filter layer 124, and then send them into the first desorption packing input end 1023 of the bottom layer through the second discharge pipe 207. For example, the second jet fan 208 uses the clean gas discharged from the first exhaust port 105 of the bottom adsorption filter layer 124 to discharge the pure powder adsorbed particles on the second filter plate 203 out of the desorption tower 201, and sends the pure powder adsorbed particles through the second discharge pipe 207 into the first desorption packing input end 1023 of the first gas-solid mixer 102 of the bottom adsorption filter layer 124, realizing the recycling of the powder adsorbed particles. In this embodiment, the pure powder adsorbed particles and the clean gas output by the second jet fan 208 form an airflow and enter the first gas-solid mixer 102. The airflow acts on the first non-powered wind turbine impeller 1022, causing the first non-powered wind turbine impeller 1022 to rotate violently. After the powder adsorbed particles and organic waste gas are rapidly mixed to form a mixed airflow, they enter the bottom adsorption filter layer 124, improving the flowability of the airflow in the adsorption tower 101 and improving the gas-solid mass transfer efficiency.

[0054] In this embodiment, reference Figure 3 The desorption and regeneration device 20 also includes an adsorption packing circulation pipe 215 and a third jet fan 214. The first end of the adsorption packing circulation pipe 215 is connected to the second discharge port 206, and the second end of the adsorption packing circulation pipe 215 is connected to the second desorption packing input end 2023. The output end of the third jet fan 214 is connected to the adsorption packing circulation pipe 215, and the input end of the third jet fan 214 is connected to the second exhaust port 205. The third jet fan 214 is used to discharge the powder adsorbed particles on the second filter plate 203 from the desorption tower 201 through the gas discharged through the second exhaust port 205, and send them into the second desorption packing input end 2023 through the adsorption packing circulation pipe 215. For example, the third jet fan 214 uses the high-temperature organic steam discharged from the second exhaust port 205 of the desorption tower 201 to discharge the powder adsorbed particles on the second filter plate 203 from the desorption tower 201. The powder adsorbed particles are then sent to the second gas-solid mixer 202 through the adsorption packing circulation pipe 215, where the high-temperature organic steam inside the desorption tower 201 further desorbs the powder adsorbed particles. Similarly, the repeated extraction and feeding of powder adsorbed particles into the desorption tower 201 enhances the turbulent flow within the tower, improves mass transfer efficiency, shortens the regeneration time of the powder adsorbed particles, and reduces the operating costs of the desorption and regeneration device 20.

[0055] In this embodiment, the desorption and regeneration device further includes a nitrogen purge pipe 2030 and a nitrogen regulating valve 2031. The nitrogen purge pipe 2030 and the nitrogen regulating valve 2031 are connected to the organic vapor circulation pipe 210. The nitrogen purge pipe 2030 is used to purge the system with nitrogen when the desorption and regeneration device system is started, replacing the air in the system space and controlling the oxygen content of the system within the set standard. The nitrogen regulating valve 2031 is used to replenish the nitrogen consumed by the system in a timely manner during system operation, regulate the oxygen content in the system, and ensure the safe operation of the system.

[0056] In one embodiment, reference Figure 3 The multi-stage mixed filtration type organic waste gas adsorption and purification system also includes a post-treatment device, and the desorption and regeneration device 20 also includes a saturated packing collection, separation and replenishment device and an organic vapor collection pipe 213. A first valve 211 is installed on the organic vapor circulation pipe 210, and a second valve 212 is installed on the organic vapor collection pipe 213. The first end of the organic vapor circulation pipe 210 is connected to the output end of the circulating heating fan 204, and the second end of the organic vapor circulation pipe 210 is connected to the input end of the organic vapor circulation heater 209. The output end of the organic vapor circulation heater 209 is connected to the saturated packing conveying pipe 2021 on the desorption and regeneration device. The first end of the organic vapor collection pipe 213 is connected to the output end of the circulating heating fan 204, and the second end of the organic vapor collection pipe 213 is connected to the post-treatment device 40. The saturated packing collection, separation and replenishment device is connected to the saturated packing conveying pipe on the desorption and regeneration device. For example, when the first valve 211 is open and the second valve 212 is closed, the circulating heating fan 204 can extract the high-temperature organic vapor from the desorption tower 201 through the second exhaust port 205, and then send the high-temperature organic vapor into the organic vapor circulating heater 209 through the organic vapor circulating pipe 210 for heating. The heated high-temperature organic vapor enters the second gas-solid mixer 202 under the action of the circulating heating fan 204 to perform high-temperature desorption of the powder adsorbed particles again. The organic vapor circulating heater 209 can increase the temperature of the high-temperature organic vapor, keep the gas in the desorption tower 201 at a high temperature, so that the powder adsorbed particles are fully mixed with the high-temperature organic vapor in a high-temperature environment, and quickly desorb into pure powder adsorbed particles, thereby improving the desorption and regeneration efficiency of the powder adsorbed particles. Moreover, the high-temperature organic vapor is repeatedly extracted and sent into the desorption tower 201, which enhances the airflow turbulence in the desorption tower 201, improves the mass transfer effect, shortens the regeneration time of the powder adsorbed particles, and reduces the operating cost of the desorption and regeneration device 20. When the second valve 212 is open and the first valve 211 is closed, the circulating heating fan 204 can extract the high-temperature organic vapor in the desorption tower 201 from the second exhaust port 205, and then send the high-temperature organic vapor to the post-treatment device 40 for treatment through the organic vapor collection pipe 213.

[0057] In this embodiment, the multi-stage mixed filtration type organic waste gas adsorption purification system further includes a post-treatment device 40, which includes: a condensation recovery device, a catalytic combustion device (RCO), or a regenerative thermal oxidizer (RTO). The condensation recovery device is used to condense the gas discharged from the organic vapor collection pipe into liquid through a multi-stage condenser and collect the liquid. The catalytic combustion device (RCO) or the regenerative thermal oxidizer (RTO) is used to oxidize and burn the organic waste gas to eliminate the direct pollution of the atmospheric environment by the organic waste gas.

[0058] In one embodiment, the multi-stage mixed filtration type organic waste gas adsorption and purification system further includes a control device, a concentration monitoring instrument, and a temperature monitoring instrument. The concentration monitoring instrument and the temperature monitoring instrument are installed inside the desorption tower 201, and are connected to the control device along with the organic steam circulation heater 209. The concentration monitoring instrument detects the concentration of organic components in the gas inside the desorption tower 201 and sends the concentration data to the control device. The temperature monitoring instrument detects the temperature of the gas inside the desorption tower 201 and sends the temperature data to the control device. The control device is used to reduce the temperature of the organic steam circulation heater 209 to lower the operating load when the organic component concentration is greater than or equal to a preset concentration and the temperature is greater than or equal to a preset temperature; and to increase the temperature of the organic steam circulation heater 209 to increase the operating load when the organic component concentration is less than the preset concentration and the temperature is less than the preset temperature, thus ensuring the stable operation of the desorption and regeneration device. For example, the preset concentration and preset temperature can be considered as the concentration and temperature of the organic components in the gas inside the desorption tower 201 when the purity of the powder adsorbed particles in the desorption tower 201 reaches the level required for reintroduction into the adsorption and purification device 10. When the concentration of organic components in the gas inside the desorption tower 201 is greater than or equal to a preset concentration and the temperature is greater than or equal to a preset temperature, it indicates that the adsorbed powder particles inside the desorption tower 201 have been completely desorbed and become pure adsorbed powder particles. At this time, the temperature of the organic vapor circulation heater 209 can be reduced, thus reducing the power consumption of the organic vapor circulation heater 209. When the concentration of organic components in the gas inside the desorption tower 201 is less than a preset concentration and the temperature is less than a preset temperature, it indicates that the adsorbed powder particles inside the desorption tower 201 have not yet been desorbed and become pure adsorbed powder particles. At this time, the temperature of the organic vapor circulation heater 209 can be increased to further enhance the desorption capacity of the desorption tower 201 and improve the desorption efficiency.

[0059] In this embodiment, the first valve 211 and the second valve 212 are connected to a control device. The control device is used to control the closure of the first valve 211 and the opening of the second valve 212 when the concentration of organic components is greater than or equal to a preset concentration and the temperature is greater than or equal to a preset temperature; and to control the opening of the first valve 211 and the closure of the second valve 212 when the concentration of organic components is less than the preset concentration and the temperature is less than the preset temperature. For example, when the powder adsorbed particles in the desorption tower 201 have been completely desorbed and become pure powder adsorbed particles, the control device can control the opening of the second valve 212 and the closure of the first valve 211, so that the gas discharged from the desorption tower 201 enters the post-processing device for recovery through the organic vapor collection pipe 213, avoiding the influence of high concentrations of organic components on the desorption of the powder adsorbed particles. When the adsorbed powder particles in the desorption tower 201 are not desorbed and become pure adsorbed powder particles, the opening of the first valve 211 and the closing of the second valve 212 can be controlled by the control device so that the gas discharged from the desorption tower 201 is heated by the organic steam circulation heater 209 and then returned to the desorption tower 201 for high-temperature desorption, thereby improving the desorption efficiency of the adsorbed powder particles in the desorption tower 201.

[0060] In summary, the multi-stage mixed filtration type organic waste gas adsorption and purification system provided by this invention sends organic waste gas and powder adsorption particles into a first gas-solid mixer 102, which drives a first non-powered pneumatic impeller 1022 to rotate. Under the rotation of the first non-powered pneumatic impeller 1022, the organic waste gas and powder adsorption particles form a mixed airflow and then enter the adsorption filter layer. This allows the organic waste gas and powder adsorption particles to fully contact each other within the adsorption filter layer, greatly increasing the contact area. The powder adsorption particles fully adsorb the organic components in the organic waste gas, improving the adsorption efficiency of organic components. Under their own gravity, the powder adsorption particles in the adsorption filter layer gradually settle onto the first filter screen 103, forming a filter layer of a certain thickness. The organic waste gas in the adsorption filter layer passes through the adsorption filter layer under the action of the first exhaust fan 104 and comes into contact with the powder adsorption particles again. The organic components in the organic waste gas are again adsorbed by the powder adsorption particles, improving the purification effect of the organic waste gas and ensuring that emission standards are met.

[0061] Organic waste gas is fed into the first gas-solid mixer 102 of the top-level adsorption filter layer 121. Under the action of the first exhaust fan 104, the organic waste gas flows from top to bottom through the first gas-solid mixer 102 of each adsorption filter layer and enters the corresponding adsorption filter layer. Finally, it is discharged from the adsorption tower 101 from the first exhaust port of the top-level adsorption filter layer 121. Pure powder adsorption particles are fed into the first gas-solid mixer 102 of the bottom-level adsorption filter layer 124. After adsorbing the organic waste gas in the bottom-level adsorption filter layer 124, the powder adsorption particles fall onto the first filter screen 103 of the bottom-level adsorption filter layer 124 and are fed into the first gas-solid mixer 102 of the next-level adsorption filter layer through the first discharge port 106 of the bottom-level adsorption filter layer 124. The powder adsorption particles flow from bottom to top through the first gas-solid mixer 102 of each adsorption filter layer and enter the corresponding adsorption filter layer. Finally, they are discharged from the adsorption tower 101 from the first discharge port 106 of the top-level adsorption filter layer 121. The higher the purity of the powder adsorption particles in each adsorption filter layer from top to bottom, the stronger the adsorption capacity. The lower the concentration of organic components in the organic waste gas in each adsorption and filtration layer from top to bottom, the easier it is for the powder adsorption particles to adsorb and purify it. When the organic waste gas with the lowest organic component concentration enters the bottom adsorption and filtration layer 124, it is adsorbed and purified by the powder adsorption particles with the strongest adsorption capacity. As a result, the concentration of organic components in the organic waste gas is far below the emission standards, thus improving the purification effect of the organic waste gas.

[0062] By feeding the saturated powder adsorbed particles discharged from the top adsorption filter layer 121 into the second gas-solid mixer 202 of the desorption and regeneration device 20, and by feeding high-temperature organic steam into the second gas-solid mixer 202 of the desorption and regeneration device 20, the saturated powder adsorbed particles are brought into full contact with the high-temperature organic steam, causing the organic components in the powder adsorbed particles to evaporate rapidly and improving the desorption efficiency of the organic components. The desorption and regeneration device 20 performs high-temperature desorption on the saturated powder adsorbed particles to recover pure powder adsorbed particles, and sends the pure powder adsorbed particles into the first gas-solid mixer 102 of the bottom adsorption filter layer 124, realizing the recycling of powder adsorbed particles, avoiding secondary pollution to the environment, and saving the cost of using powder adsorbed particles. The adsorption purification device 10 and the desorption and regeneration device 20 can operate continuously. The entire organic waste gas adsorption purification system has the advantages of low operating and maintenance costs and low regeneration energy consumption, making it easy to promote and use in industrial applications.

[0063] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A multi-stage hybrid filtration type organic waste gas adsorption and purification system, characterized in that, include: Adsorption purification device and desorption regeneration device, wherein: The adsorption purification device includes an adsorption tower, a first exhaust fan, and multiple adsorption filter layers arranged in layers within the adsorption tower. Each adsorption filter layer includes a first gas-solid mixer, a first filter screen, a first jet fan, and a first discharge pipe. The first gas-solid mixer includes a first desorption packing input end, an organic waste gas input end, a first mixing output end, and a first non-powered pneumatic impeller. The first gas-solid mixer is positioned above the corresponding first filter screen, and the first mixing output end faces the corresponding first filter screen. The input end of the first exhaust fan is connected to a first exhaust port opened on the adsorption tower wall below the bottom first filter screen. The first discharge port opened on the adsorption tower wall above the first filter screen is connected to the first desorption packing input end of the next layer through the first discharge pipe and the first jet fan. The organic waste gas is fully mixed with the adsorption packing in the first gas-solid mixer and then adsorbed and filtered. The organic waste gas passes through the adsorption packing deposited on the first filter screen and is adsorbed and filtered again, and then passes through each of the adsorption filter layers in sequence. The desorption and regeneration device includes a desorption tower, a circulating heating fan, a second discharge pipe, a second jet fan, an organic steam circulating heater, an organic steam circulating pipeline, and a second gas-solid mixer and a second filter plate disposed within the desorption tower. The second gas-solid mixer includes a second desorption packing input end, a saturated packing conveying pipe on the desorption and regeneration device, a second mixing output end, and a second non-powered pneumatic impeller. The second gas-solid mixer is disposed above the second filter plate, and the second mixing output end faces the second filter plate. The input end of the circulating heating fan is connected to a second exhaust port opened on the wall of the desorption tower below the second filter plate. The saturated packing conveying pipe on the desorption and regeneration device is connected to the output end of the circulating heating fan through the organic steam circulating heater and the organic steam circulating pipeline. The top first discharge port is connected to the input end of the second desorption packing. The second discharge port on the desorption tower wall above the second filter screen is connected to the input end of the bottom first desorption packing through the second discharge pipe and the second jet fan.

2. The multi-stage hybrid filtration type organic waste gas adsorption and purification system according to claim 1, characterized in that, Each adsorption filter layer further includes a first guide tube, and the lower adsorption filter layer in two adjacent adsorption filter layers further includes a second guide tube. The input end of the first guide tube is connected to the first mixing output end of the same layer, and the output end of the first guide tube faces the first filter screen of the same layer. The output end of the first guide tube is larger than the input end of the first guide tube. The output end of the second guide tube is connected to the organic waste gas input end of the same layer, and the input end of the second guide tube faces the first filter screen of the upper layer. The input end of the second guide tube is larger than the output end of the second guide tube. Wherein: The second guide pipe is used to guide the organic waste gas output from the first gas-solid mixer in the upper layer into the first gas-solid mixer in the same layer; The first guide tube is used to guide the powder adsorption particles output from the first gas-solid mixer in the same layer to fall evenly onto the first filter screen in the same layer.

3. The multi-stage hybrid filtration type organic waste gas adsorption and purification system according to claim 1, characterized in that, The multi-stage mixed filtration type organic waste gas adsorption and purification system also includes a saturated packing collection, separation, and replenishment device. The input end of the saturated packing collection, separation, and replenishment device is connected to the first discharge port of the top layer, the first output end of the saturated packing collection, separation, and replenishment device is connected to the organic waste gas input end of the top layer, and the second output end of the saturated packing collection, separation, and replenishment device is connected to the input end of the second desorption packing, wherein: The saturated packing collection, separation, and replenishment device is used to separate the saturated powder adsorbed particles discharged from the top adsorption filter layer from the airflow, send the separated saturated powder adsorbed particles into the desorption tower, and send the separated gas into the top adsorption filter layer.

4. The multi-stage hybrid filtration type organic waste gas adsorption and purification system according to claim 1, characterized in that, The first end of the first discharge pipe is connected to the first discharge port of the same layer, the second end of the first discharge pipe is connected to the first desorption packing input end or the second desorption packing input end of the next layer, the output end of the first jet fan is connected to the first discharge pipe of the same layer, and the input end of the first jet fan is connected to the first exhaust port opened below the first filter screen of the same layer, wherein: The first jet fan is used to discharge the powder adsorbed particles on the first filter screen of the same layer from the adsorption tower through the gas discharged from the corresponding adsorption filter layer, and send them to the first desorption packing input end or the second desorption packing input end of the next layer through the corresponding first discharge pipe.

5. The multi-stage hybrid filtration type organic waste gas adsorption and purification system according to claim 1, characterized in that, The first end of the second discharge pipe is connected to the second discharge port, the second end of the second discharge pipe is connected to the input end of the first desorption packing material at the bottom layer, the output end of the second jet blower is connected to the second discharge pipe, and the input end of the second jet blower is connected to the first exhaust port at the bottom layer, wherein: The second jet fan is used to discharge the powder adsorbed particles on the second filter screen from the desorption tower through the clean gas discharged from the bottom adsorption filter layer, and send them into the first desorption packing input end of the bottom layer through the second discharge pipe.

6. The multi-stage hybrid filtration type organic waste gas adsorption and purification system according to claim 5, characterized in that, The desorption and regeneration device further includes an adsorption packing circulation pipe and a third jet fan. The first end of the adsorption packing circulation pipe is connected to the second discharge port, the second end of the adsorption packing circulation pipe is connected to the second desorption packing input end, the output end of the third jet fan is connected to the adsorption packing circulation pipe, and the input end of the third jet fan is connected to the second exhaust port. Wherein: The third jet fan is used to discharge the powder adsorbed particles on the second filter screen from the desorption tower through the gas discharged through the second exhaust port, and send them to the input end of the second desorption packing through the adsorption packing circulation pipe to realize the circulation heating of the packing and improve the regeneration effect.

7. The multi-stage mixed filtration type organic waste gas adsorption and purification system according to claim 1, characterized in that, The desorption and regeneration device further includes a nitrogen purge pipe and a nitrogen regulating valve, which are connected to an organic vapor circulation pipeline, wherein: The nitrogen purging pipe is used to purge the system with nitrogen when the desorption and regeneration device system is started, to replace the air in the system space, and to control the oxygen content of the system within the set standard. The nitrogen regulating valve is used to replenish the nitrogen consumed by the system in a timely manner during system operation, regulate the oxygen content in the system, and ensure the safe operation of the system.

8. The multi-stage hybrid filtration type organic waste gas adsorption and purification system according to claim 1, characterized in that, The desorption and regeneration device further includes a saturated packing collection, separation, and replenishment device and an organic vapor collection pipeline. A first valve is installed on the organic vapor circulation pipeline, and a second valve is installed on the organic vapor collection pipeline. The first end of the organic vapor circulation pipeline is connected to the output end of the circulating heating fan, and the second end of the organic vapor circulation pipeline is connected to the input end of the organic vapor circulation heater. The output end of the organic vapor circulation heater is connected to the saturated packing conveying pipe on the desorption and regeneration device. The first end of the organic vapor collection pipeline is connected to the output end of the circulating heating fan, and the second end of the organic vapor collection pipeline is connected to a post-treatment device. The saturated packing collection, separation, and replenishment device is connected to the saturated packing conveying pipe on the desorption and regeneration device.

9. The multi-stage mixed filtration type organic waste gas adsorption and purification system according to claim 8, characterized in that, The multi-stage mixed filtration type organic waste gas adsorption and purification system further includes a post-treatment device, which includes: a condensation recovery device, a catalytic combustion device, or a regenerative thermal combustion device, wherein: The condensation recovery device is used to condense the gas discharged from the organic vapor collection pipe into a liquid through a multi-stage condenser, and to collect the liquid. The catalytic combustion device or regenerative combustion device is used to oxidize and burn organic waste gas, thereby eliminating the direct pollution of the atmospheric environment by organic waste gas.

10. The multi-stage hybrid filtration type organic waste gas adsorption and purification system according to claim 1, characterized in that, The multi-stage hybrid filtration type organic waste gas adsorption and purification system also includes a control device and a gas detection device. The gas detection device is installed below each layer of the first filter screen. The control device is connected to the gas detection device and the first jet fan, wherein: The gas detection device is used to detect gas data corresponding to the space below the first filter screen and send the gas data to the control device. The control device is used to control the first jet fan in the lower layer to run continuously when the gas data is greater than a preset data threshold, so as to increase the addition ratio of the adsorption packing; and to control the first jet fan in the lower layer to run intermittently when the gas data is less than or equal to the preset data threshold, so as to reduce the addition ratio of the adsorption packing.

11. The multi-stage hybrid filtration type organic waste gas adsorption and purification system according to claim 1, characterized in that, The multi-stage mixed filtration type organic waste gas adsorption and purification system further includes a control device, a concentration monitoring instrument, and a temperature monitoring instrument. The concentration monitoring instrument and the temperature monitoring instrument are installed inside the desorption tower. The concentration monitoring instrument, the temperature monitoring instrument, and the organic steam circulation heater are connected to the control device, wherein: The concentration monitoring instrument is used to detect the concentration of organic components in the gas inside the desorption tower and send the concentration of organic components to the control device; The temperature monitoring instrument is used to detect the temperature of the gas inside the desorption tower and send the temperature to the control device; The control device is used to reduce the operating load by lowering the temperature of the organic steam circulation heater when the concentration of the organic component is greater than or equal to a preset concentration and the temperature is greater than or equal to a preset temperature; and to increase the temperature of the organic steam circulation heater to increase the operating load when the concentration of the organic component is less than a preset concentration and the temperature is less than a preset temperature, thereby ensuring the stable operation of the desorption and regeneration device.

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