WO2023193285A1

WO2023193285A1 - Waste gas treatment method and apparatus using same

Info

Publication number: WO2023193285A1
Application number: PCT/CN2022/086256
Authority: WO
Inventors: 李东; 马鹏涛; 杨友强; 齐文良; 李宝森; 林锦龙
Original assignee: 金发科技股份有限公司
Priority date: 2022-04-06
Filing date: 2022-04-12
Publication date: 2023-10-12
Also published as: CN114733332A; CN118022513A

Abstract

A waste gas treatment method and an apparatus using same. The waste gas treatment method comprises the following steps: step S100: sequentially performing cooling treatment and coarse filtration treatment on waste gas; step S200: performing fine filtration on the waste gas; step S300: performing oxidation, photolysis and chlorine addition reactions on the waste gas; and step S400: performing refiltration treatment, and drying and demisting treatment on the waste gas. The solution is suitable for organic waste gas treatment comprising particles and complex components, and can serve as a universal solution for waste gas treatment; moreover, the integration level is high, the design and construction costs are low, the occupied area is small, and the treatment efficiency is high.

Description

Waste gas treatment method and device

Technical field

The present invention relates to the technical field of exhaust gas treatment, and in particular to an exhaust gas treatment method and its device.

Background technique

Exhaust gas usually contains harmful substances such as particulate matter and oil mist. These harmful substances have a significant impact on the environment, but are difficult to treat and make it difficult to meet national emission standards.

Take the plastic industry as an example. In order to give plastic materials specific properties, various fillers and additives need to be added during production. During the high-temperature processing of plastics, high-temperature oil mist, dust, halides and gaseous volatile substances are produced during high-temperature cracking. Organic waste gases from organic matter. These organic waste gases will produce stench. If they are not effectively collected and processed, they will seriously pollute the local ecological environment and cause personal injury to residents in surrounding areas and production employees in enterprises. In addition, the volatile organic compounds in these exhaust gases will partially condense on the inner wall of the pipeline. Under long-term operation, the inner wall of the pipeline will accumulate more combustible oil scale, which brings safety risks to production. During treatment, the waste gas composition is very complex and the production of different product types will produce different types of organic waste gas. Since the plastic product manufacturing industry has the characteristics of many production varieties, small batches and high frequency of production changes, the versatility of waste gas treatment equipment is required. High, and the existing exhaust gas treatment devices are expensive, difficult to clean and maintain later, and improper treatment may even lead to secondary pollution.

At present, the existing technology often requires customized related equipment to process exhaust gas with complex components. However, this customized equipment has poor versatility and high cost.

Contents of the invention

The object of the present invention is to provide an exhaust gas treatment method with good versatility, low cost and suitable for treating exhaust gas with complex components, and an exhaust gas treatment device that uses the exhaust gas treatment method to treat exhaust gas.

In order to achieve the above objects, a first aspect of the present invention provides an exhaust gas treatment method, including the following steps:

Step S100: Perform cooling treatment and coarse filtration treatment on the exhaust gas in sequence;

Step S200: Perform fine filtration treatment on the exhaust gas;

Step S300: Perform oxidation, photolysis and chlorine addition reaction on the exhaust gas;

Step S400: Re-filter, dry and defoam the exhaust gas.

Further, the step S100 includes:

Step S110: Set up a cylindrical first filter;

Step S120: Transport the exhaust gas into the interior of the first filter from one end of the first filter;

Step S130: Set an annular exhaust gas outlet outside the first filter screen.

Further, the step S100 also includes:

Step S140: Transport water to the inner wall of the first filter to cool it.

Further, the first filter screen set in step S110 includes porous metal mesh plates, metal mesh and non-woven fabrics arranged in sequence from the inside to the outside;

The porous metal mesh plate, metal mesh and non-woven fabric respectively have pore channels, and the diameters of the pore channels of the porous metal mesh plate, metal mesh and non-woven fabric decrease in sequence.

Further, in step S200, the fine filtration of exhaust gas includes:

Step S210: Set up an ultrasonic cleaning component and a second filter for fine filtration of the exhaust gas;

Step S220: Use the ultrasonic cleaning component to intermittently clean the second filter.

Further, the step S220 includes:

Step S221: Divide the second filter into a first area and a second area;

Step S222: The ultrasonic cleaning component cleans the first area, and the exhaust gas passes through the second area for fine filtration;

Step S223: The ultrasonic cleaning component cleans the second area, and the exhaust gas passes through the first area for fine filtration.

Further, the step S300 includes: performing oxidation, photolysis and chlorine addition reaction on the exhaust gas.

Further, the step S300 includes:

Step S310: Set up a reaction base with a reaction chamber;

Step S320: Set up a molecular sieve and a regeneration unit for regenerating the molecular sieve in the reaction chamber;

Step S330: Supply the waste gas into the reaction chamber to perform oxidation, photolysis and chlorine addition reactions.

Further, the step S400 includes:

Step S410: Re-filter the exhaust gas;

Step S420: Perform drying and defoaming treatment on the exhaust gas.

Compared with the existing technology, the waste gas treatment method according to the embodiment of the present invention has the following beneficial effects:

1. This embodiment is suitable for the treatment of organic waste gas containing particles and complex components, and can be used as a general solution for waste gas treatment.

2. This embodiment has a high degree of integration, low design and construction costs, a small floor area, and high processing efficiency.

In order to achieve the above object, a second aspect of the present invention provides an exhaust gas treatment device, including a first processing module, a second processing module, a third processing module and a fourth processing module; the first processing module is used to sequentially treat the exhaust gas Cooling treatment and coarse filtration are carried out. The second treatment module is used to finely filter the exhaust gas flowing out from the first treatment module. The third treatment module is used to oxidize and light the exhaust gas flowing out from the second treatment module. Decomposition and chlorine addition reaction, the fourth treatment module is used to re-filter and dry the exhaust gas flowing out from the third treatment module; wherein, the first treatment module, the second treatment module, the The third processing module and the fourth processing module are stacked in sequence.

Description of the drawings

Figure 1 is a flow chart of an exhaust gas treatment method according to an embodiment of the present invention.

Figure 2 is an overall structural diagram of the first processing module according to the embodiment of the present invention.

Figure 3 is an overall front view of the first processing module according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view along the line A-A in FIG. 3 of the first processing module according to the embodiment of the present invention.

Figure 5 shows the positional relationship between the first rotating shaft, water pipe, column, scraper and fixed column of the first processing module according to the embodiment of the present invention.

Figure 6 is a structural diagram of the second processing module and the second part of the first barrel according to the embodiment of the present invention.

Figure 7 is an overall structural diagram of the second processing module according to the embodiment of the present invention.

Figure 8 is a front view of the second processing module according to the embodiment of the present invention.

Fig. 9 is a cross-sectional view along the B-B direction in Fig. 8 of the second processing module according to the embodiment of the present invention.

Figure 10 is an overall structural diagram of the third processing module according to the embodiment of the present invention.

Fig. 11 is a cross-sectional view along the C-C direction in Fig. 10 of the third processing module according to the embodiment of the present invention.

Figure 12 is another schematic diagram of the third processing module according to the embodiment of the present invention.

Figure 13 is an overall structural diagram of the fourth processing module according to the embodiment of the present invention.

FIG. 14 is a cross-sectional view along the D-D direction in FIG. 13 of the fourth processing module according to the embodiment of the present invention.

Figure 15 is a front view of the fourth processing module according to the embodiment of the present invention.

Fig. 16 is an overall cross-sectional view of the exhaust gas treatment device according to the embodiment of the present invention.

In the figure, 100, first processing module; 110, base; 111, first air inlet; 120, first cylinder; 121, first part; 122, second part; 130, first filter; 131, cover Plate; 140, first outlet; 150, first rotating shaft; 160, water pipe; 170, column; 180, scraper; 190, fixed column;

200. Second processing module; 210. Bottom plate; 220. Second cylinder; 221. Second air inlet; 230. Second filter; 240. Vibrator; 250. Second rotating shaft; 260. Partition plate;

300. Third processing module; 310. Reaction base; 311. Reaction chamber; 312. Third air inlet; 320. Molecular sieve; 330. Photolysis light source; 340. Third rotating shaft;

400. The fourth processing module; 410. Drying and defoaming component; 420. Filtration component; 430. Liquid inlet pipe; 440. Liquid outlet pipe;

500. Water circulation module; 510. Water tank; 520. Filter box; 530. Electrolytic cell; 540. Sewage pool; 550. First water supply pipe; 560. First return water pipe; 570. Second water supply pipe; 580. Gas supply pipe; 590. Circulation pipe.

Detailed ways

Specific implementations of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The directions or positions indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" etc. The relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore It should not be construed as a limitation of the present invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise expressly provided and limited, the term "above" or "below" a first feature of a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.

As shown in Figure 1, an exhaust gas treatment method according to the preferred embodiment of the present invention includes the following steps:

Step S200: Perform fine filtration treatment on the exhaust gas;

Step S400: Re-filter, dry and defoam the exhaust gas.

After step S100, the temperature in the exhaust gas is reduced to prevent other parts of the exhaust gas treatment device of this embodiment from being damaged by high temperature, and after rough filtration, large particulate matter in the exhaust gas will be removed; after step S200 , after the exhaust gas is finely filtered, the small particles of dust, oil mist and water vapor in the exhaust gas that have not been removed by coarse filtration are removed; after step S300, the organic matter in the exhaust gas undergoes a chemical reaction and is removed from the gas; after step S400, When the third treatment module 300 performs the reaction, the gas and moisture mixed into the exhaust gas to perform oxidation and chlorine addition reactions on the exhaust gas will be removed, so that the discharged exhaust gas meets the emission standards.

Specifically, please refer to Figures 2 to 16. A preferred embodiment of the present invention also provides an exhaust gas treatment device for implementing the above exhaust gas treatment method. The exhaust gas treatment device includes a first processing module 100, a second processing module 200, a third processing module 300 and a fourth processing module 400; the first processing module 100, the second processing module 200, the third The three processing modules 300 and the fourth processing module 400 are stacked in sequence; the first processing module 100 is used to sequentially perform cooling processing and coarse filtration processing of the exhaust gas, and the second processing module 200 is used to perform the first processing The exhaust gas flowing out of the module 100 is subjected to fine filtration treatment. The third processing module 300 is used to perform oxidation, photolysis and chlorine addition reaction on the exhaust gas flowing out from the second processing module 200. The fourth processing module 400 is used to The exhaust gas flowing out from the third treatment module 300 is re-filtered, dried and defoamed.

Based on the above solution, when processing waste gas in this embodiment, the waste gas passes through the first processing module 100, the second processing module 200, the third processing module 300 and the fourth processing module 400 from bottom to top; after passing through the first processing module 100 hours, the temperature in the exhaust gas is lowered to prevent other parts of the exhaust gas treatment device of this embodiment from being damaged by high temperature, and after rough filtration, large particulate matter in the exhaust gas will be removed; after the second processing module 200 When the exhaust gas undergoes fine filtration, the small particles of dust, oil mist and water vapor in the exhaust gas that have not been removed by rough filtration are removed; when passing through the third processing module 300, the organic matter in the exhaust gas undergoes a chemical reaction and is removed from the gas; after When the fourth treatment module 400 is used, the gas and moisture mixed into the exhaust gas to perform oxidation and chlorine addition reactions on the exhaust gas during the reaction in the third treatment module 300 will be removed to facilitate discharge.

Compared with the existing technology, this embodiment has the following beneficial effects:

Among them, the waste gas with complex components described in this embodiment refers to the waste gas containing high-temperature oil mist, dust, halides, and gaseous volatile organic compounds produced by high-temperature cracking (such as aromatics, amines, hydrogen sulfide, phenols, Aldehydes, acids, alkalis, unsaturated hydrocarbons, etc.) organic waste gas. The specific composition of this organic waste gas is related to the type of products that need to be produced.

Further, in some embodiments, step S100 includes:

Step S110: Set up a cylindrical first filter 130;

Step S120: Transport the exhaust gas into the interior of the first filter 130 from one end of the first filter 130;

Step S130: Set an annular exhaust gas outlet outside the first filter 130.

In this embodiment, the exhaust gas enters the first cylinder 120 from the middle and moves laterally to pass through the first filter 130 to achieve rough filtration. When passing through the first filter 130, the lateral movement speed is slow, so The filtering effect is good.

In this further embodiment, in order to implement the above method, please refer to Figures 2 to 16. In the exhaust gas treatment device, the first treatment module 100 includes a base 110 and a first cylinder 120 installed on the base 110. and the first filter 130 provided in the first cylinder 120; the first filter 130 is encircled in a cylinder shape and is coaxially arranged with the first cylinder 120 on the base 110; The base 110 has a first air inlet 111 communicated with the first filter 130, and a third air inlet 111 for exhaust gas to flow out is formed between the upper edge of the first cylinder 120 and the upper edge of the first filter 130. 140 for one exit. It also includes a cover plate 131 , which is provided on the upper part of the first filter screen 130 .

In the above exhaust gas treatment device, the exhaust gas enters the first filter screen 130 from the first air inlet 111 and flows in a direction generally parallel to the first filter screen 130. After passing through the first filter screen 130 transversely, it flows from the first outlet 140 outflow.

Further, in some embodiments, step S100 also includes:

Step S140: Deliver water to the inner wall of the first filter 130 to cool it.

In this further embodiment, to implement the above method, please refer to FIGS. 2 to 16 , the exhaust gas treatment device further includes a first rotating shaft 150 , a plurality of water pipes 160 , a plurality of columns 170 and a plurality of scrapers 180 ; The first rotating shaft 150 is disposed in the first filter screen 130 and extends along the axis of the first filter screen 130 . A plurality of water delivery pipes 160 are respectively arranged at circumferential intervals around the first rotating shaft 150 . The water pipes 160 respectively extend toward the inner wall of the first filter 130 and are close to the inner wall of the first filter 130. The first rotating shaft 150 is hollow inside, and a plurality of the water pipes 160 are connected to the first rotating shaft respectively. 150 inside; a plurality of uprights 170 correspond to a plurality of water pipes 160, and each of the uprights 170 is installed on the end of the corresponding water pipe 160 away from the first rotating shaft 150; a plurality of the The scraper 180 corresponds to the plurality of uprights 170 one by one, and each scraper 180 is installed along the corresponding upright 170 and attached to the inner wall of the first filter 130 .

In the above exhaust gas treatment device, when the amount of exhaust gas filtered by the first filter 130 reaches a certain level, it is believed that the accumulated impurities on the first filter 130 will have a greater impact on the filtering effect of the first filter 130; at this time, , the first rotating shaft 150 works, and the plurality of water pipes 160, the plurality of columns 170 and the plurality of scrapers 180 rotate accordingly. The plurality of scrapers 180 rotate against the inner wall of the first filter screen 130 and can move the first The impurities attached to the inner wall of the filter screen 130 are scraped off; at the same time, water is passed through the plurality of water pipes 160, and the water flows out from the ends of the water pipes 160 and flows downward along the scraper 180 to clean the inner wall of the first filter screen 130. Carry out cleaning; wherein, when the scraper 180 is cleaning and scraping, the first filter 130 can still filter normally, and filtering and cleaning do not interfere with each other.

When the water flows downward along the scraper 180 , it takes away the heat on the first filter 130 and cools the first filter 130 and the exhaust gas passing through the first filter 130 .

The water flowing downward along the scraper 180 will be concentrated in the liquid collection tank, where it will be collected and processed centrally to prevent the water from returning to the industrial wastewater treatment device of this embodiment. Optionally, set up a container to centrally collect the water in the collecting tank.

The above-mentioned embodiments can achieve beneficial effects such as extending the service life of the first processing module 100 and reducing maintenance costs.

Preferably, in the waste gas treatment device, a liquid collecting tank is provided on the base 110, and a waste water outlet is provided at the bottom of the liquid collecting tank; the first air inlet 111 is opened in the middle of the liquid collecting tank.

Preferably, the exhaust gas treatment device further includes a bracket, which is disposed near the lower end of the first rotating shaft 150 and supports each upright column 170 to improve the stability of the upright column 170 .

Preferably, in the exhaust gas treatment device, the first cylinder 120 is made of corrosion-resistant materials, such as stainless steel, coated metal materials, fiberglass and other materials.

Preferably, the first rotating shaft 150 extends in the direction of the first air inlet 111 and passes through the first air inlet 111; the first processing module 100 further includes fixed columns 190, and the number of the fixed columns 190 is: A plurality of fixed posts 190 are provided at circumferential intervals along the first rotating shaft 150 on the end of the first rotating shaft 150 passing through the first air inlet 111 . The end of 190 away from the first rotating shaft 150 is installed on the back of the base 110 to fix the first rotating shaft 150 .

Further, please refer to Figures 2 to 16. In some embodiments, the first filter 130 set in step S110 includes a porous metal mesh plate, a metal mesh and a non-woven fabric arranged in sequence from the inside to the outside; The porous metal mesh plate, metal mesh and non-woven fabric respectively have pore channels, and the diameters of the pore channels of the porous metal mesh plate, metal mesh and non-woven fabric decrease in sequence.

In this embodiment, through the multi-layer design structure, the first filter 130 can achieve a good filtering function, and in particular can effectively isolate oil dirt and dust.

Further, in some embodiments, step S200 includes:

Step S210: Set up an ultrasonic cleaning component and a second filter 230 for fine filtration of the exhaust gas;

Step S220: Use the ultrasonic cleaning component to intermittently clean the second filter 230.

In this further embodiment, in order to implement the above method, in the exhaust gas treatment device, please refer to FIGS. 2 to 16 , the second treatment module 200 includes a bottom plate 210 and a second cylinder 220 provided on the bottom plate 210 , a second filter 230, and an ultrasonic cleaning component; the second filter 230 is located on the top of the second cylinder 220 and closes the opening on the top of the second cylinder 220, and the ultrasonic component has a The vibrator 240 is on the bottom plate 210 and is located in the second cylinder 220. A second air inlet 221 and a liquid inlet are provided on the side of the second cylinder 220.

In this embodiment, during fine filtration, the exhaust gas enters the second cylinder 220 laterally from the second air inlet 221 on the side of the second cylinder 220, stays in the second cylinder 220, then flows upward and passes through second filter screen 230; during this period, when the amount of exhaust gas filtered by the second filter screen 230 reaches a certain value, it is considered that the impurities remaining on the second filter screen 230 will affect the filtering effect of the second filter screen 230, and then the access is opened. The liquid port is used to fill the second cylinder 220 with liquid. When the liquid fills the second cylinder 220, the ultrasonic component is turned on, and the vibrator 240 vibrates to clean the second filter 230.

Further, in some implementations, step S220 includes:

Step S221: Divide the second filter 230 into a first area and a second area;

In this further embodiment, in order to implement the above method, in the exhaust gas treatment device, please refer to FIGS. 2 to 16 , the second treatment module 200 further includes a second treatment module 200 disposed vertically in the second cylinder 220 . Partition plate 260; the partition plate 260 is rotatably arranged on the bottom plate 210, and the rotation axis of the partition plate 260 coincides with the axis of the second cylinder 220; the partition plate 260 connects the second cylinder 220 It is divided into a first area and a second area, and the vibrators 240 are distributed in the first area and the second area; the partition 260 can rotate and switch between the first position and the second position. When the partition When the plate 260 is in the first position, the first area is connected to the second air inlet 221, and the second area is connected to the liquid inlet; when the partition plate 260 is in the third When in the second position, the second area is connected to the second air inlet 221, and the first area is connected to the liquid inlet.

In this embodiment, when the second processing module 200 is working, the partition 260 is in the first position, the exhaust gas enters the first area through the second air inlet 221, and the second filter screen 230 in the first area Filtration, when the amount of exhaust gas filtered by the second filter 230 in the first area is constant, it is considered that the remaining impurities on the second filter 230 in the first area will affect the filtering effect. At this time, the partition 260 rotates to the third In the second position, the exhaust gas enters the second area through the second air inlet 221 and is filtered at the second filter 230 in the second area; while the first area will enter water through the liquid inlet and is in the first area. The vibrator 240 works to clean the second filter screen 230 in the first area; thus repeatedly, one area realizes the filtration of the exhaust gas, while at the same time the second filter screen 230 in the other area is cleaned, cleaned and The filtration is performed simultaneously without interfering with each other, which can effectively extend the service life of the second processing module 200 and reduce maintenance costs.

Preferably, the bottom plate 210 is set inside the second cylinder 220, the first cylinder 120 extends upward to the outside of the second cylinder 220, and the exhaust gas flows through the gap between the second cylinder 220 and the first cylinder 120. to the second air inlet 221. Optionally, the first cylinder 120 is divided into a first part 121 corresponding to the first filter 130 and a second part 122 corresponding to the second cylinder 220. There is a method between the first part 121 and the second part 122. Lan connection. The exhaust gas passes through the gap between the second part 122 and the second cylinder 220 and enters the second air inlet 221 .

Preferably, the second filter 230 includes porous mesh plates and breathable filter materials stacked in sequence; the breathable filter material has a hydrophobic and oleophobic function. Optionally, the breathable filter material is a non-woven PE material with a PTFE-treated surface.

Preferably, the bottom plate 210 is provided with an annular body that forms a cofferdam with the bottom plate 210 , and the vibrator 240 is disposed in the cofferdam. Further, water is supplied from the cofferdam to the first area or the second area.

Preferably, the first region and the second region are symmetrically arranged and occupy half of the internal space of the second cylinder 220 respectively.

Preferably, the second processing module 200 further includes a second rotating shaft 250 , which is connected to the partition plate 260 and capable of controlling the rotation of the partition plate 260 . Optionally, the first rotating shaft 150 and the second rotating shaft 250 are connected through a coupling, and the first rotating shaft 150 and the second rotating shaft 250 rotate synchronously.

Further, in some embodiments, the step S300 includes: performing oxidation, photolysis and chlorine addition reaction on the exhaust gas.

In this further embodiment, in order to implement the above method, in the exhaust gas treatment device, please refer to Figures 2 to 16. In some embodiments, the third treatment module 300 includes a reaction base 310, and the reaction base The interior of 310 is provided with a reaction chamber 311 for oxidation, photolysis, and chlorine addition of exhaust gas; the bottom of the reaction base 310 has a third air inlet connected to the reaction chamber 311 and for the exhaust gas to enter. 312. The reaction base 310 also has a predetermined entrance for oxidizing substances and chlorine addition substances to enter; the third processing module 300 also includes a photolysis light source 330 for irradiating the reaction chamber 311.

In this embodiment, the third processing module 300 performs chemical treatments such as oxidation, photolysis, and chlorine addition on the exhaust gas, and simultaneously performs multiple chemical treatment methods to ensure that target objects in the exhaust gas can be effectively removed.

Preferably, in some embodiments, a buffer cylinder is provided between the second processing module 200 and the third processing module 300, a buffer channel is provided in the buffer cylinder, and the third air inlet 312 is connected to the buffer cylinder. The upper end of the channel is connected, and the lower end of the buffer channel is connected with the upper end of the second cylinder 220 ; the predetermined entrance is connected to the second cylinder 220 . In this preferred embodiment, oxidizing substances and chlorine adding substances can be transported into the second cylinder 220 so that oxidizing substances, chlorine adding substances and waste gas can flow out from the second cylinder 220 into the buffer channel together. , after mixing evenly in the buffer channel, it then enters the reaction chamber 311 for reaction. The chemical treatment reaction is thorough and efficient.

Preferably, the photolysis light source 330 is a UV quartz light pipe.

Preferably, a third rotating shaft 340 is also included. The number of photolysis light sources 330 is multiple and each is in a strip shape. The plurality of photolysis light sources 330 are arranged at circumferential intervals on the third rotating shaft 340 .

Further, in some embodiments, step S300 includes:

Step S310: Set up the reaction base 310 with the reaction chamber 311;

Step S320: Set molecular sieve 320 and a regeneration unit for regenerating molecular sieve 320 in the reaction chamber 311;

Step S330: Supply the waste gas into the reaction chamber 311 to perform oxidation, photolysis and chlorine addition reactions.

In this further embodiment, in order to implement the above method, in the exhaust gas treatment device, please refer to FIGS. 2 to 16 , the third treatment module 300 further includes a molecular sieve 320 disposed in the reaction chamber 311 and a The regeneration unit regenerates the molecular sieve 320 to extend the residence time of the waste gas in the reaction chamber 311, extend the reaction time, and improve the impurity removal effect.

Further, in some embodiments, step S400 includes:

Step S410: Re-filter the exhaust gas;

Step S420: Perform drying and defoaming treatment on the exhaust gas.

In this further embodiment, in order to implement the above method, in the exhaust gas treatment device, please refer to Figures 2 to 16, the fourth treatment module 400 includes a drying and defoaming component 410 and a filtering component 420; the drying and defoaming component 410 is disposed above the filter assembly 420 . In this embodiment, the filter component 420 of the fourth processing module 400 further re-filters the exhaust gas flowing out of the third processing module 300 to remove attached impurities; and the drying and defoaming component 410 performs drying and defoaming processing on the exhaust gas. Clean exhaust gas to discharge exhaust gas that meets emission standards.

Preferably, the fourth processing module 400 includes an exhaust component; the exhaust component includes a fan, a pipeline, a detection instrument, a circulation treatment guide tube, a motor, etc.

Further, please refer to Figures 2 to 16. In some embodiments, the fourth processing module 400 also includes a liquid inlet pipe 430 and a liquid outlet pipe 440. The outlet of the liquid inlet pipe 430 is located in the filter assembly 420. Between the drying and defoaming assembly 410 , the inlet of the liquid inlet pipe 430 is located below the filter assembly 420 .

In this embodiment, the liquid flowing out of the liquid inlet pipe 430 passes through the filter assembly 420 to clean the filter assembly 420. The cleaned liquid flows out with the liquid outlet pipe 440, thereby extending the service life of the filter assembly 420 and reducing maintenance costs. Effect.

In the above-mentioned industrial wastewater treatment device, the first treatment module 100 needs to use liquid to clean the first filter screen 130, the second treatment module 200 needs to use liquid to clean the second filter screen 230, and the third treatment module 300 needs to use liquid to clean the second filter screen 230. Various gases are needed to perform oxidation, photolysis and chlorine addition reactions on the waste gas, and the fourth treatment module 400 needs liquid to process the filter assembly 420 . In this regard, in order to ensure the normal operation of the first treatment module 100, the second treatment module 200, the third treatment module 300 and the fourth treatment module 400, the industrial wastewater treatment device also needs to include a water circulation module 500, using the water circulation module 500 supplies water to the first processing module 100, the second processing module 200 and the fourth processing module 400; the water circulation module 500 includes an electrolysis component to supply various gases to the third processing module 300.

Specifically, in some embodiments, please refer to FIGS. 2 to 16 , the water circulation module 500 includes a water tank 510 , a first water supply pipe 550 connecting the water tank 510 and the liquid inlet pipe 430 , a clean water outlet and a The filter box 520 of the sewage outlet, the first return pipe 560 connecting the filter box 520 and the liquid outlet pipe 440, and the electrolytic cell connected to the clean water outlet of the filter box 520 and having an electrolytic gas outlet and an electrolytic liquid outlet. 530. The sewage pool 540 connected to the sewage outlet of the filter box 520, the second water supply pipe 570 connecting the sewage pool 540 and the inside of the first rotating shaft 150, the electrolytic gas outlet and the second cylinder 220. The gas supply pipe 580, and the circulation pipe 590 connecting the electrolytic liquid outlet and the water tank 510.

Among them, although the electrolyte after passing through the filter assembly 420 contains impurities, the filter pool in the filter assembly 420 is exhaust gas that has been filtered multiple times. Therefore, the cleanliness of the electrolyte after passing through the filter assembly 420 is still relatively high. Therefore, after filtering The electrolyte after the assembly 420 can flow into the first rotating shaft 150 through the sewage outlet and be used for cleaning the first filter 130 .

The water in the water circulation module 500 refers to the electrolyte. The electrolyte uses an alkaline solution of some salts and surfactants such as sodium chloride/sodium chlorate/sodium hypochlorite/sodium hydroxide, so that it can generate energy after electrolysis. Substances that undergo chemical processing.

In this preferred embodiment, through the recycling of electrolyte, the consumption of electrolyte can be effectively reduced, thereby increasing the service life of the water circulation module 500 and reducing maintenance costs.

Preferably, a pump body is provided to improve the efficiency of water circulation. Optionally, the pump body has a filtering function to prevent impurities from entering the pump body and damaging the pump body. Optionally, the pump body is a ceramic membrane pump.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like is intended to be incorporated into the description of the implementation. An example or example describes a specific feature, structure, material, or characteristic that is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the invention. The scope of the invention is defined by the claims and their equivalents.

Claims

An exhaust gas treatment method, characterized in that it includes the following steps:

Step S100: Perform cooling treatment and coarse filtration treatment on the exhaust gas in sequence;

Step S200: Perform fine filtration treatment on the exhaust gas;

Step S300: Perform oxidation, photolysis and chlorine addition reaction on the exhaust gas;

Step S400: Re-filter, dry and defoam the exhaust gas.
The exhaust gas treatment method according to claim 1, characterized in that the step S100 includes:

Step S110: Set up a cylindrical first filter;

Step S120: Transport the exhaust gas into the interior of the first filter from one end of the first filter;

Step S130: Set an annular exhaust gas outlet outside the first filter screen.
The exhaust gas treatment method according to claim 2, characterized in that step S100 further includes:

Step S140: Transport water to the inner wall of the first filter to cool it.
The exhaust gas treatment method according to claim 2, characterized in that the first filter screen set in step S110 includes a porous metal mesh plate, a metal mesh and a non-woven fabric arranged in sequence from the inside to the outside;

The porous metal mesh plate, metal mesh and non-woven fabric respectively have pore channels, and the diameters of the pore channels of the porous metal mesh plate, metal mesh and non-woven fabric decrease in sequence.
The exhaust gas treatment method according to claim 1, characterized in that the step S200 includes:

Step S210: Set up an ultrasonic cleaning component and a second filter for fine filtration of the exhaust gas;

Step S220: Use the ultrasonic cleaning component to intermittently clean the second filter.
The exhaust gas treatment method according to claim 5, characterized in that the step S220 includes:

Step S221: Divide the second filter into a first area and a second area;

Step S222: The ultrasonic cleaning component cleans the first area, and the exhaust gas passes through the second area for fine filtration;

Step S223: The ultrasonic cleaning component cleans the second area, and the exhaust gas passes through the first area for fine filtration.
The exhaust gas treatment method according to claim 1, wherein step S300 includes:

Step S310: Set up a reaction base with a reaction chamber;

Step S320: Set up a molecular sieve and a regeneration unit for regenerating the molecular sieve in the reaction chamber;

Step S330: Supply the waste gas into the reaction chamber to perform oxidation, photolysis and chlorine addition reactions.
The exhaust gas treatment method according to claim 1, wherein step S400 includes:

Step S410: Re-filter the exhaust gas;

Step S420: Perform drying and defoaming treatment on the exhaust gas.
An exhaust gas treatment device, characterized by including:

A first processing module, the first processing module is used to sequentially perform cooling processing and rough filtration processing on the exhaust gas;

a second processing module, the second processing module is used to perform fine filtration processing on the exhaust gas flowing out from the first processing module;

A third treatment module, the third treatment module is used for oxidation, photolysis and chlorine addition reaction of the exhaust gas flowing out from the second treatment module; and

A fourth treatment module, the fourth treatment module is used to re-filter, dry and defoam the exhaust gas flowing out from the third treatment module;

Wherein, the first processing module, the second processing module, the third processing module and the fourth processing module are stacked in sequence.