CN114733332A

CN114733332A - Waste gas treatment method and device

Info

Publication number: CN114733332A
Application number: CN202210357243.5A
Authority: CN
Inventors: 李东; 马鹏涛; 杨友强; 齐文良; 李宝森; 林锦龙
Original assignee: Kingfa Science and Technology Co Ltd
Current assignee: Kingfa Science and Technology Co Ltd
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-07-12
Also published as: WO2023193285A1

Abstract

The invention relates to the technical field of waste gas treatment, and discloses a waste gas treatment method and a device thereof, wherein the waste gas treatment method comprises the following steps: step S100: sequentially carrying out cooling treatment and coarse filtration treatment on the waste gas; step S200: fine filtering the waste gas; step S300: carrying out oxidation, photolysis and chlorine addition reaction on the waste gas; step S400: and carrying out refiltering and drying defoaming treatment on the waste gas. The invention is suitable for treating organic waste gas containing particles and complex components and can be used as a general scheme for treating the waste gas; meanwhile, the integration degree is higher, the design and construction cost is lower, the occupied area is smaller, and the treatment efficiency is high.

Description

Waste gas treatment method and device

Technical Field

The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment method and a device thereof.

Background

The waste gas usually contains harmful substances such as particulate matters and oil mist, and the harmful substances have great influence on the environment, but are difficult to treat and cannot reach the national emission standard.

Taking the plastic industry as an example, in order to endow the plastic material with specific properties, various fillers and additives are required to be added during production, high-temperature oil mist, dust and halide are generated in the high-temperature processing process of the plastic, and organic waste gas containing gaseous volatile organic compounds is generated through high-temperature cracking. These organic waste gases produce malodors which, if not effectively collected and disposed of, can severely contaminate the local surrounding ecological environment and cause personal injury to residents and manufacturing personnel within the enterprise in the surrounding area. In addition, volatile organic compounds in the waste gas can be partially condensed on the inner wall of the pipeline, and more combustible oil dirt is accumulated on the inner wall of the pipeline under the long-term operation, so that potential safety hazards are brought to production. During the processing, the production of the very complicated and different product types of waste gas composition will produce different types of organic waste gas, because the plastic product manufacturing has the characteristics that the production variety is many, and the batch is few and the frequency of changeing production is high, and it is higher to the commonality requirement of exhaust-gas treatment equipment, and current exhaust-gas treatment device is expensive, and later clearance and maintenance work are difficult, and improper handling can still lead to secondary pollution even.

At present, related equipment is required to be customized in the prior art to treat exhaust gas with complex components, but the customization equipment has poor universality and high cost.

Disclosure of Invention

The purpose of the invention is: provided are an exhaust gas treatment method which is highly versatile, low in cost, and suitable for treating exhaust gas having a complicated composition, and an exhaust gas treatment device for treating exhaust gas using the exhaust gas treatment method.

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

step S100: sequentially carrying out cooling treatment and coarse filtration treatment on the waste gas;

step S200: fine filtering the waste gas;

step S300: carrying out oxidation, photolysis and chlorine addition reaction on the waste gas;

step S400: and carrying out refiltering and drying defoaming treatment on the waste gas.

Further, the step S100 includes:

step S110: a first filter screen in a cylindrical shape is arranged;

step S120: conveying exhaust gas into the first filter screen from one end of the first filter screen;

step S130: and an annular waste gas outlet is arranged on the outer side of the first filter screen.

Further, the step S100 further includes:

step S140: and delivering water to the inner wall of the first filter screen to cool the filter screen.

Further, the first filter screen set in step S110 includes a porous metal mesh plate, a metal wire mesh and a non-woven fabric sequentially arranged from inside to outside;

the porous metal mesh plate, the metal wire mesh and the non-woven fabric are respectively provided with a pore passage, and the pore diameters of the porous metal mesh plate, the metal wire mesh and the non-woven fabric are reduced in sequence.

Further, in step S200, the fine filtering process for the exhaust gas includes:

step S210: arranging an ultrasonic cleaning component and a second filter screen for finely filtering the waste gas;

step S220: and intermittently cleaning the second filter screen by using the ultrasonic cleaning assembly.

Further, the step S220 includes:

step S221: dividing the second filter screen into a first area and a second area;

step S222: the ultrasonic cleaning component cleans the first area, and the waste gas is finely filtered through the second area;

step S223: the ultrasonic cleaning assembly cleans the second area, and the waste gas is finely filtered through the first area.

Further, the step S300 includes: the exhaust gas undergoes oxidation, photolysis and chlorine addition reactions.

Further, the step S300 includes:

step S310: arranging a reaction base with a reaction chamber;

step S320: arranging a molecular sieve and a regeneration unit for regenerating the molecular sieve in the reaction chamber;

step S330: an exhaust gas is fed into the reaction chamber to perform oxidation, photolysis, and chlorine addition reactions.

Further, the step S400 includes:

step S410: performing secondary filtration treatment on the waste gas;

step S420: and carrying out drying and defoaming treatment on the waste gas.

Compared with the prior art, the waste gas treatment method provided by the embodiment of the invention has the beneficial effects that:

1. the embodiment is suitable for treating organic waste gas containing particles and complex components, and can be used as a general scheme for treating the waste gas.

2. The integration degree of this embodiment is higher, and the cost of design and construction is lower, and area is less, and the treatment effeciency is high.

In order to achieve the above object, a second aspect of the present invention provides an exhaust gas treatment device including a first treatment module, a second treatment module, a third treatment module, and a fourth treatment module; the first treatment module is used for sequentially performing cooling treatment and coarse filtration treatment on the waste gas, the second treatment module is used for performing fine filtration on the waste gas flowing out of the first treatment module, the third treatment module is used for performing oxidation, photolysis and chlorine addition reaction on the waste gas flowing out of the second treatment module, and the fourth treatment module is used for performing refiltering and drying defoaming treatment on the waste gas flowing out of 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.

Drawings

Fig. 1 is a flowchart of an exhaust gas treatment method according to an embodiment of the present invention.

Fig. 2 is an overall configuration diagram of a first processing module according to an embodiment of the present invention.

FIG. 3 is an overall front view of a first processing module of an embodiment of the present invention.

Fig. 4 is a sectional view taken along a line a-a in fig. 3 of the first process module according to the embodiment of the present invention.

Fig. 5 is a positional relationship among the first rotating shaft, the water pipe, the upright post, the scraper, and the fixing post of the first processing module according to the embodiment of the present invention.

Fig. 6 is a block diagram of a second process module and a second portion of the first cylinder of an embodiment of the present invention.

Fig. 7 is an overall configuration diagram of a second processing module according to the embodiment of the present invention.

FIG. 8 is a front view of a second processing module of an embodiment of the present invention.

Fig. 9 is a sectional view taken along the direction B-B in fig. 8 of a second process module according to an embodiment of the present invention.

Fig. 10 is an overall configuration diagram of a third processing module according to the embodiment of the present invention.

Fig. 11 is a sectional view taken along the direction C-C in fig. 10 of a third process module according to an embodiment of the present invention.

FIG. 12 is another schematic diagram of a third processing module according to an embodiment of the invention.

Fig. 13 is an overall configuration diagram of a fourth processing module according to the embodiment of the present invention.

FIG. 14 is a cross-sectional view taken in the direction of D-D in FIG. 13 of a fourth process module in accordance with an embodiment of the invention.

FIG. 15 is a front view of a fourth processing module of an embodiment of the present invention.

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

In the figure, 100, a first processing module; 110. a base; 111. a first air inlet; 120. a first cylinder; 121. a first portion; 122. a second portion; 130. a first filter screen; 131. a cover plate; 140. a first outlet; 150. a first rotating shaft; 160. a water delivery pipe; 170. a column; 180. a squeegee; 190. fixing a column;

200. a second processing module; 210. a base plate; 220. a second cylinder; 221. a second air inlet; 230. a second filter screen; 240. a vibrator; 250. a second rotating shaft; 260. a partition plate;

300. a third processing module; 310. a reaction base; 311. a reaction chamber; 312. a third air inlet; 320. a molecular sieve; 330. a photolytic light source; 340. a third rotating shaft;

400. a fourth processing module; 410. drying the defoaming component; 420. a filter assembly; 430. a liquid inlet pipe; 440. a liquid outlet pipe;

500. a water circulation module; 510. a water tank; 520. a filter box; 530. an electrolytic cell; 540. a sewage tank; 550. a first water supply pipe; 560. a first water return pipe; 570. a second water supply pipe; 580. a gas supply pipe; 590. a circulation pipe.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

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

step S200: fine filtering the waste 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 coarse filtration, large particulate matters in the exhaust gas are removed; after the step S200, fine filtering is performed on the waste gas, and then the small-particle dust, oil mist and water vapor which are not coarsely filtered and removed in the waste gas 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, the gas and moisture mixed into the exhaust gas to perform oxidation and chlorine addition reactions on the exhaust gas when the third process module 300 performs a reaction are removed, so that the exhaust gas meets the emission standards.

Specifically, referring to fig. 2 to 16, a preferred embodiment of the present invention further provides an exhaust gas treatment device for implementing the above exhaust gas treatment method. The exhaust gas treatment device comprises a first treatment module 100, a second treatment module 200, a third treatment module 300 and a fourth treatment module 400; the first processing module 100, the second processing module 200, the third processing module 300, and the fourth processing module 400 are sequentially stacked; first processing module 100 is used for carrying out cooling treatment and coarse filtration in proper order to waste gas, second processing module 200 is used for carrying out the fine filtration processing to the waste gas that flows out from first processing module 100, third processing module 300 is used for carrying out oxidation, photolysis and chlorine addition reaction to the waste gas that flows out from second processing module 200, fourth processing module 400 is used for carrying out refilter and dry defoaming processing to the waste gas that flows out from third processing module 300.

Based on the above scheme, when the exhaust gas is treated in the embodiment, the exhaust gas sequentially passes through the first treatment module 100, the second treatment module 200, the third treatment module 300 and the fourth treatment module 400 from bottom to top; when the exhaust gas passes through the first treatment module 100, the temperature in the exhaust gas is reduced to prevent other parts of the exhaust gas treatment device of the embodiment from being damaged by high temperature, and large particulate matters in the exhaust gas are removed after coarse filtration; when the exhaust gas passes through the second treatment module 200, after the exhaust gas is subjected to fine filtration, small-particle dust, oil mist and water vapor which are not removed by coarse filtration in the exhaust gas are removed; when the waste gas passes through the third treatment module 300, organic matters in the waste gas are chemically reacted and removed from the gas; while passing through the fourth treatment module 400, the gas and moisture mixed into the exhaust gas to perform oxidation and chlorine addition reactions on the exhaust gas while the third treatment module 300 is reacting are removed to be discharged.

Compared with the prior art, the embodiment has the following beneficial effects:

The exhaust gas with complex components in this embodiment refers to an organic exhaust gas with gaseous volatile organic compounds (such as aromatics, amines, hydrogen sulfide, phenols, aldehydes, acids, alkalis, unsaturated hydrocarbons, etc.) generated by high-temperature oil mist, dust, halides and pyrolysis, and the specific components of the organic exhaust gas are related to the type of products to be produced.

Further, in some embodiments, the step S100 includes:

step S110: a first filter 130 in a cylindrical shape is provided;

step S120: feeding exhaust gas from one end of the first filter 130 into the interior of the first filter 130;

step S130: an annular exhaust gas outlet is provided 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 coarse filtration, wherein the lateral movement speed is slower when passing through the first filter 130, so the filtering effect is good.

In this further embodiment, referring to fig. 2 to 16, in order to implement the above method, in the exhaust gas treatment device, the first treatment module 100 includes a base 110, a first cylinder 120 mounted on the base 110, and a first filter 130 disposed in the first cylinder 120; the first filter 130 is enclosed into a cylinder shape and is coaxially arranged on the base 110 with the first cylinder 120; the base 110 has a first air inlet 111 communicating with the inside of the first filter 130, and a first outlet 140 for the 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. Wherein, the filter further comprises a cover plate 131 which is arranged on the upper part of the first filter 130.

In the above exhaust gas treatment device, the exhaust gas enters the first filter 130 through the first inlet 111, flows in a direction substantially parallel to the first filter 130, laterally passes through the first filter 130, and then flows out of the first outlet 140.

Further, in some embodiments, the step S100 further includes:

step S140: and delivering water to the inner wall of the first filter 130 to perform cooling treatment.

In this further embodiment, to implement the above method, please refer to fig. 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 arranged in the first filter screen 130 and extends along the axis of the first filter screen 130, the plurality of water conveying pipes 160 are arranged around the first rotating shaft 150 at intervals in the circumferential direction, the plurality of water conveying pipes 160 extend towards the inner wall of the first filter screen 130 and are close to the inner wall of the first filter screen 130, the first rotating shaft 150 is hollow, and the plurality of water conveying pipes 160 are communicated to the inside of the first rotating shaft 150; a plurality of upright columns 170 are in one-to-one correspondence with the plurality of water pipes 160, and each upright column 170 is respectively installed on the end part of the corresponding water pipe 160 far away from the first rotating shaft 150; the plurality of scrapers 180 correspond to the plurality of columns 170 one by one, and each scraper 180 is mounted along the corresponding column 170 and attached to the inner wall of the first filter 130.

In the above exhaust gas treatment device, when the amount of the exhaust gas filtered by the first filter 130 reaches a certain amount, it is considered that the impurities accumulated on the first filter 130 at this time have a great influence on the filtering effect of the first filter 130; at this time, the first rotating shaft 150 operates, and the plurality of water pipes 160, the plurality of columns 170, and the plurality of scrapers 180 rotate along with the first rotating shaft, wherein the plurality of scrapers 180 rotate along with the inner wall of the first filter 130, so that impurities attached to the inner wall of the first filter 130 can be scraped; meanwhile, water is respectively introduced into the plurality of water pipes 160, and the water flows out from the ends of the water pipes 160 and flows downwards along the scraper 180 to clean the inner wall of the first filter 130; wherein, when the scraper 180 cleans and scrapes, the first filter 130 can still filter normally, and the filtering and cleaning are not interfered with each other.

Wherein, when water flows down along scraper 180, has taken away the heat on first filter screen 130, cools down first filter screen 130 and the waste gas that passes through first filter screen 130.

The water flowing downward along the scraper 180 is collected in the liquid collecting tank, collected by the liquid collecting tank, and treated in a centralized manner, so that the water is prevented from returning to the industrial wastewater treatment apparatus of the present embodiment. Optionally, a container is provided to collect the water centrally in the sump.

The embodiment can achieve the beneficial effects of prolonging the service life of the first processing module 100, reducing the maintenance cost and the like.

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

Preferably, the exhaust gas treatment device further includes a bracket disposed on a lower end of first rotating shaft 150 and supporting each of pillars 170, respectively, to improve stability of pillars 170.

Preferably, in the exhaust gas treatment device, the first cylinder 120 is made of a corrosion-resistant material, such as stainless steel, or a coated metal material, or glass fiber reinforced plastic.

Preferably, the first rotating shaft 150 extends toward the first air inlet 111 and penetrates through the first air inlet 111; the first processing module 100 further includes a plurality of fixing posts 190, the number of the fixing posts 190 is plural, the plurality of fixing posts 190 are arranged at intervals along the circumferential direction of the first rotating shaft 150 on the end portion of the first rotating shaft 150 penetrating through the first air inlet 111, and the end portions of the plurality of fixing posts 190 far away from the first rotating shaft 150 are installed on the back surface of the base 110 to fix the first rotating shaft 150.

Further, referring to fig. 2 to 16, in some embodiments, the first filter 130 disposed in step S110 includes a porous metal mesh plate, a metal wire mesh and a non-woven fabric sequentially disposed from inside to outside; the porous metal mesh plate, the metal wire mesh and the non-woven fabric are respectively provided with a pore passage, and the pore diameters of the porous metal mesh plate, the metal wire mesh and the non-woven fabric are reduced in sequence.

In this embodiment, the first filter 130 can achieve a good filtering function, especially can effectively isolate oil stains and dust, by using a multi-layer structure.

Further, in some embodiments, the step S200 includes:

step S210: an ultrasonic cleaning component and a second filter screen 230 for fine filtering the waste gas are arranged;

step S220: the second filter 230 is intermittently cleaned using the ultrasonic cleaning assembly.

In this further embodiment, in order to implement the above method, in the exhaust gas treatment device, referring to fig. 2 to 16, the second treatment module 200 includes a bottom plate 210, a second cylinder 220 disposed on the bottom plate 210, a second filter screen 230, and an ultrasonic cleaning assembly; the second filter screen 230 is arranged at the top of the second cylinder 220 and seals the opening at the top of the second cylinder 220, the ultrasonic assembly is provided with a vibrator 240 which is arranged on the bottom plate 210 and is positioned in the second cylinder 220, and a second air inlet 221 and a liquid inlet are arranged on the side surface of the second cylinder 220.

In this embodiment, during fine filtration, the exhaust gas enters the second cylinder 220 from the second air inlet 221 on the side of the second cylinder 220 along the transverse direction, stays in the second cylinder 220, then flows upwards and passes through the second filter screen 230; meanwhile, when the amount of the exhaust gas filtered by the second filter 230 reaches a certain value, it is considered that the impurities remaining on the second filter 230 will affect the filtering effect of the second filter 230, the liquid inlet is opened to fill the liquid into the second cylinder 220, and after the liquid is fully filled in the second cylinder 220, the ultrasonic assembly is turned on, and the vibrator 240 vibrates to clean the second filter 230.

Further, in some embodiments, the step S220 includes:

step S221: the second filter 230 is divided 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, referring to fig. 2 to 16, the second treatment module 200 further includes a partition 260 disposed in the second cylinder 220 and vertically disposed; the partition plate 260 is rotatably arranged on the bottom plate 210, and a rotating shaft of the partition plate 260 is overlapped with an axial line of the second cylinder 220; the partition plate 260 divides the second cylinder 220 into a first area and a second area, and the vibrators 240 are distributed in the first area and the second area; the partition plate 260 can be rotationally switched between a first position and a second position, when the partition plate 260 is located at the first position, the first area is communicated with the second air inlet 221, and the second area is communicated with the liquid inlet; when the partition 260 is in the second position, the second region is in communication with the second gas inlet 221 and the first region is in communication with the liquid inlet.

In this embodiment, when the second processing module 200 operates, the partition plate 260 is in the first position, the exhaust gas enters the first region through the second air inlet 221 and is filtered by the second filter screen 230 in the first region, when the amount of the exhaust gas filtered by the second filter screen 230 in the first region is constant, it is considered that the impurities remaining on the second filter screen 230 in the first region will affect the filtering effect, at this time, the partition plate 260 rotates to the second position, and the exhaust gas enters the second region through the second air inlet 221 and is filtered by the second filter screen 230 in the second region; the first area is filled with water through the liquid inlet, and the vibrator 240 in the first area works to clean the second filter screen 230 in the first area; therefore, repeatedly, one area realizes the filtration of the exhaust gas, and the second filter screen 230 in the other area is cleaned at the same time, and the cleaning and the filtration are performed at the same time without mutual interference, so that the service life of the second treatment module 200 can be effectively prolonged, and the maintenance cost is reduced.

Preferably, the bottom plate 210 is sleeved inside the second cylinder 220, the first cylinder 120 extends upward to the outside of the second cylinder 220, and the exhaust gas flows to the second air inlet 221 through the gap between the second cylinder 220 and the first cylinder 120. Optionally, the first cylinder 120 is divided into a first portion 121 corresponding to the first filter 130 and a second portion 122 corresponding to the second cylinder 220, and the first portion 121 and the second portion 122 are connected by a flange. The exhaust gas passes through a gap between the second portion 122 and the second cylinder 220, and enters the second inlet port 221.

Preferably, the second filter screen 230 includes a porous mesh plate and a gas-permeable filter material stacked in sequence; the air-permeable filter material has the functions of water repellency and oil repellency. Optionally, the breathable filter is a nonwoven PE material with a PTFE treated surface.

Preferably, a ring body enclosing a cofferdam with the bottom plate 210 is arranged on the bottom plate 210, and the vibrator 240 is arranged in the cofferdam. Further, water is supplied from the cofferdam to the first area or the second area.

Preferably, the first and second regions are symmetrically disposed and occupy half of the inner space of the second cylinder 220, respectively.

Preferably, the second process module 200 further includes a second rotating shaft 250, and the second rotating shaft 250 is connected to the partition 260 and can control the rotation of the partition 260. Alternatively, the first rotating shaft 150 and the second rotating shaft 250 are coupled by a coupling, and the first rotating shaft 150 and the second rotating shaft 250 rotate synchronously.

Further, in some embodiments, the step S300 includes: the exhaust gas undergoes oxidation, photolysis and chlorine addition reactions.

In this further embodiment, in order to implement the above method, in the exhaust gas treatment device, referring to fig. 2 to 16, in some embodiments, the third treatment module 300 includes a reaction base 310, and a reaction chamber 311 for performing oxidation, photolysis, and chlorine addition on the exhaust gas is disposed inside the reaction base 310; the bottom of the reaction base 310 has a third gas inlet 312 communicating with the reaction chamber 311 and into which the exhaust gas enters, and the reaction base 310 further has predetermined inlets into which the oxidizing substance and the chlorine addition substance enter; the third processing module 300 further includes a photolysis light source 330 for illuminating the reaction chamber 311.

In this embodiment, the third treatment module 300 performs chemical treatments such as oxidation, photolysis, and chlorine addition on the exhaust gas, and simultaneously performs a plurality of chemical treatment methods, thereby ensuring effective removal of the target substances in the exhaust gas.

Preferably, in some embodiments, a buffer cylinder is disposed between the second process module 200 and the third process module 300, a buffer channel is disposed in the buffer cylinder, the third air inlet 312 is communicated with the upper end of the buffer channel, and the lower end of the buffer channel is communicated with the upper end of the second cylinder 220; the predetermined inlet is communicated to the inside of the second cylinder 220. In the preferred embodiment, the oxidizing substance and the chlorine addition substance can be conveyed into the second cylinder 220, so that the oxidizing substance, the chlorine addition substance and the waste gas can flow out of the second cylinder 220 into the buffer channel together, and then enter the reaction chamber 311 for reaction after being uniformly mixed in the buffer channel, and the reaction of the chemical treatment is thorough and efficient.

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

Preferably, the optical splitter further includes a third rotating shaft 340, the number of the photolysis light sources 330 is multiple and is respectively in a bar shape, and the multiple photolysis light sources 330 are circumferentially spaced on the third rotating shaft 340.

Further, in some embodiments, the step S300 includes:

step S310: providing a reaction base 310 having a reaction chamber 311;

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

step S330: an exhaust gas is supplied 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, referring to fig. 2 to 16, the third treatment module 300 further includes a molecular sieve 320 disposed in the reaction chamber 311 and a regeneration unit for regenerating the molecular sieve 320, so as to prolong the residence time of the exhaust gas in the reaction chamber 311, prolong the reaction time, and improve the impurity removal effect.

Further, in some embodiments, the step S400 includes:

step S410: performing secondary filtration treatment on the waste gas;

step S420: and carrying out drying and defoaming treatment on the waste gas.

In this further embodiment, in order to implement the above method, in the exhaust gas treatment device, referring to fig. 2 to 16, the fourth treatment module 400 includes a drying and defoaming element 410 and a filtering element 420; the dry defoaming assembly 410 is disposed above the filter assembly 420. In this embodiment, the filtering assembly 420 of the fourth processing module 400 further re-filters the exhaust gas flowing out of the third processing module 300 to remove impurities attached thereto; and the drying and defoaming assembly 410 performs drying and defoaming treatment on the exhaust gas to clean the exhaust gas so as to discharge the exhaust gas meeting the emission standard.

Preferably, the fourth processing module 400 comprises a venting assembly; the air exhaust assembly comprises a fan, a pipeline, a detection instrument, a circulating treatment flow guide pipe, a motor and the like.

Further, referring to fig. 2 to 16, in some embodiments, the fourth processing module 400 further includes a liquid inlet pipe 430 and a liquid outlet pipe 440, an outlet of the liquid inlet pipe 430 is located between the filtering assembly 420 and the drying and defoaming assembly 410, and an inlet of the liquid inlet pipe 430 is located below the filtering assembly 420.

In this embodiment, the liquid that feed liquor pipe 430 flows out passes through filter assembly 420, clears up filter assembly 420, and liquid after the clearance flows out along with drain pipe 440, realizes extension filter assembly 420's life, reduces maintenance cost's beneficial effect.

In the above-mentioned industrial wastewater treatment apparatus, the first treatment module 100 needs to use liquid to clean the first filter 130, the second treatment module 200 needs to use liquid to clean the second filter 230, the third treatment module 300 needs to use various gases to perform oxidation, photolysis and chlorine addition reactions on the exhaust gas, and the fourth treatment module 400 needs to use liquid to treat the filter assembly 420. In order to ensure the normal operation of the first, second, third and

fourth treatment modules

100, 200, 300 and 400, the industrial wastewater treatment apparatus further includes a water recycling module 500, and the water recycling module 500 is used to supply water to the first, second and

fourth treatment modules

100, 200 and 400; the water circulation module 500 includes an electrolytic component to supply various gases to the third process module 300.

Specifically, in some embodiments, referring to fig. 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 filter tank 520 having a clean water outlet and a sewage outlet, a first water return pipe 560 connecting the filter tank 520 and the liquid outlet pipe 440, an electrolytic cell 530 connected to the clean water outlet of the filter tank 520 and having an electrolytic gas outlet and an electrolytic liquid outlet, a sewage tank 540 connected to the sewage outlet of the filter tank 520, a second water supply pipe 570 connecting the sewage tank 540 and the inside of the first shaft 150, a gas supply pipe 580 connecting the electrolytic gas outlet and the inside of the second cylinder 220, and a circulation pipe 590 connecting the electrolytic liquid outlet and the water tank 510.

Although the electrolyte passing through the filter assembly 420 contains impurities, the waste gas filtered for multiple times in the filter tank of the filter assembly 420 is still relatively high in cleanliness of the electrolyte passing through the filter assembly 420, and therefore the electrolyte passing through the filter assembly 420 can flow into the first rotating shaft 150 through the sewage outlet and is used for cleaning the first filter screen 130.

The water in the water circulation module 500 refers to an electrolyte solution, which uses an alkaline solution of partial salts such as sodium chloride/sodium chlorate/sodium hypochlorite/sodium hydroxide and a surfactant to generate a substance capable of being chemically treated after electrolysis.

In the preferred embodiment, the electrolyte can be recycled, so that the consumption of the electrolyte can be effectively reduced, the service life of the water recycling module 500 can be prolonged, and the maintenance cost can be reduced.

Preferably, a pump body is provided in order to increase the efficiency of the water circulation. Optionally, the pump body has a filtering function to block impurities from entering the pump body and damaging the pump body. Optionally, the pump body is a ceramic diaphragm pump.

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

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An exhaust gas treatment method, characterized by comprising the steps of:

step S200: fine filtering the waste gas;

2. The exhaust gas treatment method according to claim 1, wherein the step S100 includes:

step S110: a first filter screen in a cylindrical shape is arranged;

3. The exhaust gas treatment method according to claim 2, wherein the step S100 further includes:

4. The exhaust gas treatment method according to claim 2, wherein the first filter screen provided in step S110 includes a porous metal mesh plate, a metal wire mesh, and a nonwoven fabric provided in this order from inside to outside;

5. The exhaust gas treatment method according to claim 1, wherein the step S200 includes:

6. The exhaust gas treatment method according to claim 5, wherein the step S220 includes:

7. The exhaust gas treatment method according to claim 1, wherein the step S300 includes:

step S310: arranging a reaction base with a reaction chamber;

8. The exhaust gas treatment method according to claim 1, wherein the step S400 includes:

step S410: performing secondary filtration treatment on the waste gas;

step S420: and carrying out drying and defoaming treatment on the waste gas.

9. An exhaust gas treatment device, comprising:

the first treatment module is used for sequentially carrying out cooling treatment and coarse filtration treatment on the waste gas;

the second treatment module is used for carrying out fine filtration treatment on the waste gas flowing out of the first treatment module;

the third treatment module is used for carrying out oxidation, photolysis and chlorine addition reaction on the waste gas flowing out of the second treatment module; and

the fourth processing module is used for performing refiltering and drying defoaming treatment on the waste gas flowing out of the third processing module;

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