CN114011167A - Waste gas treatment device - Google Patents

Waste gas treatment device Download PDF

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Publication number
CN114011167A
CN114011167A CN202010738500.0A CN202010738500A CN114011167A CN 114011167 A CN114011167 A CN 114011167A CN 202010738500 A CN202010738500 A CN 202010738500A CN 114011167 A CN114011167 A CN 114011167A
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China
Prior art keywords
purification cavity
cavity
stage
liquid supply
level
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Pending
Application number
CN202010738500.0A
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Chinese (zh)
Inventor
徐萍
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Suzhou Enyisi Energy Saving And Environmental Protection Technology Co ltd
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Suzhou Enyisi Energy Saving And Environmental Protection Technology Co ltd
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Priority to CN202010738500.0A priority Critical patent/CN114011167A/en
Publication of CN114011167A publication Critical patent/CN114011167A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/38Removing components of undefined structure
    • B01D53/40Acidic components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention provides a waste gas treatment device, and belongs to the technical field of environment-friendly equipment. The device comprises a device main body, wherein three purification cavities, namely a third-level purification cavity, a second-level purification cavity and a first-level purification cavity, are arranged in the device main body from top to bottom, the third-level purification cavity is arranged above the device main body, a fan is connected above the third-level purification cavity, a second-level spraying device is arranged above the inner part of the third-level purification cavity, the second-level purification cavity is arranged below the third-level purification cavity, a baffle is arranged between the second-level purification cavity and the third-level purification cavity, a plurality of exhaust pipes are uniformly arranged on the baffle, a gas cavity is arranged between the second-level purification cavity and the device main body, the gas cavity is connected with the second-level purification cavity through a plurality of uniformly arranged one-way gas valves, the first-level purification cavity is arranged below the second-level purification cavity, and the upper part of the first-level purification cavity is connected with the gas cavity through a gas pump.

Description

Waste gas treatment device
Technical Field
The invention relates to a waste gas treatment device, and belongs to the technical field of environment-friendly equipment.
Background
The waste gas refers to toxic and harmful gas discharged by human in the production and living process. Especially chemical plants, steel plants, pharmaceutical plants, coking plants and oil refineries, etc., the discharged waste gas has large odor, seriously pollutes the environment and affects the human health. Among them, sulfur dioxide is a colorless, toxic gas, has a strong pungent odor, is heavier than air in density, and is one of the main atmospheric pollutants. Sulfur dioxide is a basic chemical raw material, is widely applied to the industries of chemical industry, medicine, metallurgy, papermaking and the like, and causes pollution to the atmospheric environment due to slight leakage, thus bringing disadvantages to production and life of people.
Most of the existing sulfur dioxide waste gas treatment devices are complex, and the treatment effect is not ideal.
The conventional waste gas treatment mainly refers to the treatment of industrial waste gas such as dust particles, smoke and dust, peculiar smell gas and toxic and harmful gas generated in industrial places, and the common waste gas treatment includes factory smoke and waste gas treatment, workshop dust and waste gas treatment, organic waste gas treatment, waste gas peculiar smell treatment, acid-base waste gas treatment, chemical waste gas treatment and the like. The waste gas treatment device mainly treats benzene, toluene, xylene, ethyl acetate, acetone butanone, ethanol, acrylic acid, formaldehyde and other organic waste gases, hydrogen sulfide, sulfur dioxide, ammonia and other acid-base waste gas treatment and organic waste gas treatment. The existing common waste gas treatment method is an activated carbon waste gas treatment adsorption method, a medicament absorption waste gas treatment method, a catalytic combustion waste gas treatment method, a thermal combustion waste gas treatment method, a plasma waste gas treatment method and the like, because the activated carbon waste gas treatment adsorption method has a simple structure, the organic waste gas treatment effect is good, the efficiency is high, the price is cheaper compared with other treatment methods, and a large amount of treatment cost is saved, but the existing waste gas is accompanied by a large amount of dust and soot, the adsorption holes of the activated carbon can be blocked, the adsorption effect of the activated carbon can be influenced, and the service life of the activated carbon can be influenced by overhigh temperature of the waste gas after the existing waste gas is discharged from equipment.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an exhaust gas treatment device, which is used to solve the problems that the existing common exhaust gas treatment method in the prior art is an activated carbon exhaust gas treatment adsorption method, the activated carbon exhaust gas treatment adsorption method has a simple structure, has a good organic exhaust gas treatment effect and high efficiency, is cheaper than other methods, and saves a large amount of treatment cost, but the existing exhaust gas is accompanied by a large amount of dust and soot, which may block adsorption pores of activated carbon, affect adsorption effect of activated carbon, and the service life of activated carbon is affected by an excessively high temperature of the exhaust gas after the existing exhaust gas is discharged from the device.
To achieve the above and other related objects, the present invention provides an exhaust gas treatment device comprising: the device comprises a device main body, wherein three purification cavities are arranged in the device main body from top to bottom and respectively comprise a third purification cavity, a second purification cavity and a first purification cavity, the third purification cavity is arranged above the device main body, a fan is connected above the third purification cavity, a second-stage spraying device is arranged above the inner part of the third purification cavity, the second-stage purification cavity is arranged below the third purification cavity, a baffle is arranged between the second-stage purification cavity and the third purification cavity, a plurality of exhaust pipes are uniformly arranged on the baffle, a gas cavity is arranged between the second-stage purification cavity and the device main body, the gas cavity is connected with the second-stage purification cavity through a plurality of uniformly arranged one-way gas valves, the first-stage purification cavity is arranged below the second-stage purification cavity, the upper part of the first-stage purification cavity is connected with the gas cavity through a gas pump, a second-stage filter screen is arranged above the inner part of the first-stage purification cavity, and a first-stage filter screen is arranged below the second-stage filter screen, the bottom of the primary purification cavity is provided with an air inlet pipeline.
By adopting the technical scheme: when carrying out purification treatment to abandonment, waste gas gets into in the inside one-level purification chamber of device main part through the admission line, waste gas gets into the one-level purification chamber of air through one-level filter screen and second grade filter screen large granule impurity and dust in the air, then the air pump is with waste gas pump in the gas chamber, waste gas gets into in the second grade purification chamber through the one-way pneumatic valve between gas chamber and the second grade purification chamber, it has alkali lye to fill in the second grade purification chamber, waste gas gets into in the second grade purification chamber and reacts with alkali lye, get rid of the acid component of waste gas, then waste gas gets into in the tertiary purification chamber through the blast pipe on the baffle, the second grade spray set in the tertiary purification chamber carries out spraying of acidizing fluid, waste gas contacts with the acidizing fluid, carry out acid-base neutralization, the gas that finishes at last purifies discharges exhaust treatment device through the fan.
In an embodiment of the present invention, the secondary purification chamber is internally provided with an alkali solution.
By adopting the technical scheme: and the alkali liquor in the secondary purification cavity reacts with the waste gas to remove acidic components in the waste gas.
In an embodiment of the present invention, an ultrasonic vibrator is disposed in the middle of the bottom surface of the primary filter screen in the primary purification cavity.
By adopting the technical scheme: when the second grade filter screen and the first grade filter screen need to be cleaned after being used for a long time, the ultrasonic vibrator is started to drive the first grade filter screen and the second grade filter screen to vibrate at a certain frequency, impurities and dust blocked in the first grade filter screen and the second grade filter screen are separated under the action of vibration, and therefore the first grade filter screen and the second grade filter screen can be cleaned
In an embodiment of the present invention, a primary spraying device is disposed below the primary filtering net in the primary purifying cavity, and a drainage pipeline is disposed in the middle of the bottom of the primary purifying cavity.
By adopting the technical scheme: after separating the impurities and the dust inside the first-stage filter screen and the second-stage filter screen through the action of the ultrasonic vibrator, starting the spraying device, uniformly spraying water mist, contacting the water mist with the impurities and the dust, and discharging the separated impurities and the separated dust through a water flow cleaning pipeline.
In an embodiment of the present invention, the liquid supply device further includes a liquid supply device, the liquid supply device is disposed on one side of the device main body, the liquid supply device includes a third-stage liquid supply tank, a second-stage liquid supply tank is disposed below the third-stage liquid supply tank, and a first-stage liquid supply tank is disposed below the second-stage liquid supply tank.
By adopting the technical scheme: the tertiary liquid supply tank, the secondary liquid supply tank and the primary liquid supply tank respectively supply liquid to the devices in the tertiary purification cavity, the secondary purification cavity and the primary purification cavity.
In an embodiment of the present invention, the upper portion of the third-stage liquid supply tank is connected to the second-stage spraying device through a third-stage liquid supply pipeline, and the bottom portion of the third-stage liquid supply tank is connected to the third-stage purification chamber through a third-stage liquid discharge pipeline.
In an embodiment of the present invention, the secondary liquid supply tank is connected to the secondary purification chamber through a secondary liquid supply pipeline and a secondary liquid discharge pipeline, respectively.
In an embodiment of the present invention, the upper portion of the first-stage liquid supply tank is connected to the first-stage spraying device through a first-stage liquid supply pipeline.
As described above, the exhaust gas treatment device of the present invention has the following advantageous effects:
according to the invention, three-stage filtration is arranged, the filter screen is used for preliminary filtration, acid components are removed by alkali liquor, and finally acid-base balance is achieved by spraying acid liquor, so that waste gas meets the emission requirement.
Drawings
Fig. 1 is a schematic front view showing an internal structure of an exhaust gas treatment device according to an embodiment of the present invention.
Fig. 2 is a schematic top view of an exhaust gas treatment device according to an embodiment of the present invention.
Fig. 3 is a schematic top view of a baffle plate of an exhaust gas treatment device according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a secondary purification chamber of an exhaust gas treatment device according to an embodiment of the present invention.
Wherein, 1, the device body; 2. a secondary spraying device; 3. a third-stage purification cavity; 4. an exhaust pipe; 5. a baffle plate; 6. a gas chamber; 7. a secondary purification cavity; 8. an air pump; 9. a secondary filter screen; 10. a first-stage filter screen; 11. a primary spray device; 12. a primary purification chamber; 13. an air intake duct; 14. a water discharge pipeline; 15. a tertiary liquid supply pipeline; 16. a third-stage liquid supply tank; 17. a tertiary liquid discharge pipeline; 18. a secondary liquid supply pipeline; (ii) a 19. A secondary liquid supply tank; 20. a device main body; 21. a secondary liquid discharge pipeline; 22. a primary liquid supply tank; 23. a primary liquid supply conduit; 24. an ultrasonic vibrator.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1, the present invention provides an exhaust gas treatment device including: the device comprises a device main body 20, three purification cavities are arranged in the device main body 20 from top to bottom and respectively comprise a third-level purification cavity 3, a second-level purification cavity 7 and a first-level purification cavity 12, the third-level purification cavity 3 is arranged above the device main body 20, a fan 1 is connected above the third-level purification cavity 3, a second-level spray device 2 is arranged above the third-level purification cavity 3, the second-level purification cavity 7 is arranged below the third-level purification cavity 3, a baffle 5 is arranged between the second-level purification cavity 7 and the third-level purification cavity 3, a plurality of exhaust pipes 4 are uniformly arranged on the baffle 5, a gas cavity 6 is arranged between the second-level purification cavity 7 and the device main body 20, the gas cavity 6 is connected with the second-level purification cavity 7 through a plurality of uniformly arranged one-way air valves, the first-level purification cavity 12 is arranged below the second-level purification cavity 7, and the upper part of the first-level purification cavity 12 is connected with the gas cavity 6 through an air pump 8, a secondary filter screen 9 is arranged above the inner part of the primary purification cavity 12, a primary filter screen 10 is arranged below the secondary filter screen 9, and an air inlet pipeline 13 is arranged at the bottom of the primary purification cavity 12.
And alkali liquor is arranged in the secondary purification cavity 7.
An ultrasonic vibrator 24 is arranged in the middle of the bottom surface of the primary filter screen 10 in the primary purification cavity 12.
A primary spraying device 11 is arranged below a primary filter screen 10 in the primary purification cavity 12, and a drainage pipeline 14 is arranged in the middle of the bottom of the primary purification cavity 12.
The liquid supply device is arranged on one side of the device main body 20 and comprises a three-stage liquid supply tank 16, a second-stage liquid supply tank 19 is arranged below the three-stage liquid supply tank 16, and a first-stage liquid supply tank 22 is arranged below the second-stage liquid supply tank 19.
The upper part of the third-stage liquid supply tank 16 is connected with the second-stage spraying device 2 through a third-stage liquid supply pipeline 15, and the bottom part of the third-stage liquid supply tank is connected with the third-stage purifying cavity 3 through a third-stage liquid drainage pipeline 17.
The secondary liquid supply tank 19 is respectively connected with the secondary purification cavity 7 through a secondary liquid supply pipeline 18 and a secondary liquid drainage pipeline 21.
The upper part of the first-stage liquid supply tank 22 is connected with the first-stage spraying device 11 through a first-stage liquid supply pipeline 23.
In conclusion, the three-stage filtration is arranged, the filter screen performs primary filtration, the alkali liquor is removed, and finally acid-base balance is achieved through acid-liquid spraying, so that the waste gas meets the emission requirement. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (8)

1. An exhaust gas treatment device, characterized in that the exhaust gas treatment device comprises: the device comprises a device main body (20), wherein three purification cavities are arranged in the device main body (20) from top to bottom and respectively comprise a third-level purification cavity (3), a second-level purification cavity (7) and a first-level purification cavity (12), the third-level purification cavity (3) is arranged above the inside of the device main body (20), a fan (1) is connected above the third-level purification cavity (3), a second-level spraying device (2) is arranged above the inside of the third-level purification cavity (3), the second-level purification cavity (7) is arranged below the third-level purification cavity (3), a baffle (5) is arranged between the second-level purification cavity (7) and the third-level purification cavity (3), a plurality of exhaust pipes (4) are uniformly arranged on the baffle (5), a gas cavity (6) is arranged between the second-level purification cavity (7) and the device main body (20), and the gas cavity (6) and the second-level purification cavity (7) are connected through a plurality of uniformly arranged one-way gas valves, the primary purification cavity (12) is arranged below the secondary purification cavity (7), the primary purification cavity (12) is connected with the gas cavity (6) through the air pump (8) above, the secondary filter screen (9) is arranged above the inner part of the primary purification cavity (12), the primary filter screen (10) is arranged below the secondary filter screen (9), and the air inlet pipeline (13) is arranged at the bottom of the primary purification cavity (12).
2. An exhaust gas treatment device according to claim 1, wherein: and alkali liquor is arranged in the secondary purification cavity (7).
3. An exhaust gas treatment device according to claim 1, wherein: an ultrasonic vibrator (24) is arranged in the middle of the bottom surface of the primary filter screen (10) in the primary purification cavity (12).
4. An exhaust gas treatment device according to claim 3, wherein: the device is characterized in that a first-stage spraying device (11) is arranged below a first-stage filter screen (10) in a first-stage purification cavity (12), and a drainage pipeline (14) is arranged in the middle of the bottom of the first-stage purification cavity (12).
5. An exhaust gas treatment device according to claim 4, wherein: the liquid supply device is arranged on one side of the device main body (20) and comprises a three-stage liquid supply box (16), a second-stage liquid supply box (19) is arranged below the three-stage liquid supply box (16), and a first-stage liquid supply box (22) is arranged below the second-stage liquid supply box (19).
6. An exhaust gas treatment device according to claim 5, wherein: the upper part of the third-stage liquid supply tank (16) is connected with the second-stage spraying device (2) through a third-stage liquid supply pipeline (15), and the bottom part of the third-stage liquid supply tank is connected with the third-stage purifying cavity (3) through a third-stage liquid drainage pipeline (17).
7. An exhaust gas treatment device according to claim 1, wherein: the secondary liquid supply tank (19) is respectively connected with the secondary purification cavity (7) through a secondary liquid supply pipeline (18) and a secondary liquid drainage pipeline (21).
8. An exhaust gas treatment device according to claim 1, wherein: the upper part of the first-stage liquid supply tank (22) is connected with a first-stage spraying device (11) through a first-stage liquid supply pipeline (23).
CN202010738500.0A 2020-07-28 2020-07-28 Waste gas treatment device Pending CN114011167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010738500.0A CN114011167A (en) 2020-07-28 2020-07-28 Waste gas treatment device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010738500.0A CN114011167A (en) 2020-07-28 2020-07-28 Waste gas treatment device

Publications (1)

Publication Number Publication Date
CN114011167A true CN114011167A (en) 2022-02-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024021506A1 (en) * 2022-07-28 2024-02-01 浙江微盾环保科技股份有限公司 Filtering apparatus

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CN204352742U (en) * 2014-12-02 2015-05-27 杭州楚天科技有限公司 Chemical washing and low temperature plasma coupling processing exhaust gas apparatus
US20150266032A1 (en) * 2012-12-26 2015-09-24 Zhiqiang Zhou Water Ion Air Purifier
CN106237805A (en) * 2016-08-31 2016-12-21 泉州中投文化发展有限公司 A kind of integrated emission-control equipment for removing sulfur hydrargyrum
CN106474921A (en) * 2016-12-03 2017-03-08 福建众辉环保设备有限公司 A kind of waste gas cleaning system
CN206867988U (en) * 2017-06-13 2018-01-12 大余县东宏锡制品有限公司 A kind of APT solid slags flue gas during smelting processing unit
CN108273333A (en) * 2018-03-15 2018-07-13 徐杨广 A kind of exhaust gas purification and treatment device
CN207769526U (en) * 2017-12-13 2018-08-28 成都新和平科技有限公司 Leather agent emission-control equipment
CN208161364U (en) * 2018-01-26 2018-11-30 东莞市清源环保设备有限公司 A UV photolysis catalytic tower
KR101937316B1 (en) * 2018-05-03 2019-04-09 주식회사 반석티씨아이 Modular odor elimination device using low temperature plasma
CN209735253U (en) * 2018-11-07 2019-12-06 天津晟泽环保设备有限公司 Multifunctional industrial gas purification device
CN210057768U (en) * 2019-04-04 2020-02-14 辽宁北方环境检测技术有限公司 Chemical industry smoke and dust exhaust gas purification device
CN210448701U (en) * 2019-06-19 2020-05-05 福建靖桥环保科技有限公司 Chemical waste gas treatment device
CN111229025A (en) * 2020-01-21 2020-06-05 天津嘉恩环保科技有限公司 Cleaning treatment device for industrial waste gas

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150266032A1 (en) * 2012-12-26 2015-09-24 Zhiqiang Zhou Water Ion Air Purifier
CN204352742U (en) * 2014-12-02 2015-05-27 杭州楚天科技有限公司 Chemical washing and low temperature plasma coupling processing exhaust gas apparatus
CN106237805A (en) * 2016-08-31 2016-12-21 泉州中投文化发展有限公司 A kind of integrated emission-control equipment for removing sulfur hydrargyrum
CN106474921A (en) * 2016-12-03 2017-03-08 福建众辉环保设备有限公司 A kind of waste gas cleaning system
CN206867988U (en) * 2017-06-13 2018-01-12 大余县东宏锡制品有限公司 A kind of APT solid slags flue gas during smelting processing unit
CN207769526U (en) * 2017-12-13 2018-08-28 成都新和平科技有限公司 Leather agent emission-control equipment
CN208161364U (en) * 2018-01-26 2018-11-30 东莞市清源环保设备有限公司 A UV photolysis catalytic tower
CN108273333A (en) * 2018-03-15 2018-07-13 徐杨广 A kind of exhaust gas purification and treatment device
KR101937316B1 (en) * 2018-05-03 2019-04-09 주식회사 반석티씨아이 Modular odor elimination device using low temperature plasma
CN209735253U (en) * 2018-11-07 2019-12-06 天津晟泽环保设备有限公司 Multifunctional industrial gas purification device
CN210057768U (en) * 2019-04-04 2020-02-14 辽宁北方环境检测技术有限公司 Chemical industry smoke and dust exhaust gas purification device
CN210448701U (en) * 2019-06-19 2020-05-05 福建靖桥环保科技有限公司 Chemical waste gas treatment device
CN111229025A (en) * 2020-01-21 2020-06-05 天津嘉恩环保科技有限公司 Cleaning treatment device for industrial waste gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024021506A1 (en) * 2022-07-28 2024-02-01 浙江微盾环保科技股份有限公司 Filtering apparatus

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Application publication date: 20220208