WO2021174454A1 - Waste gas treatment device for textile materials - Google Patents
Waste gas treatment device for textile materials Download PDFInfo
- Publication number
- WO2021174454A1 WO2021174454A1 PCT/CN2020/077819 CN2020077819W WO2021174454A1 WO 2021174454 A1 WO2021174454 A1 WO 2021174454A1 CN 2020077819 W CN2020077819 W CN 2020077819W WO 2021174454 A1 WO2021174454 A1 WO 2021174454A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas treatment
- stirring shaft
- exhaust gas
- waste gas
- box
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims abstract description 20
- 239000004753 textile Substances 0.000 title claims abstract description 20
- 239000002912 waste gas Substances 0.000 title abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 60
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 33
- 239000000428 dust Substances 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 abstract description 37
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010784 textile waste Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0052—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation
- B01D46/0056—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation with rotational movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
- B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/007—Separation 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 by irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
- B01D2273/30—Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
Definitions
- the utility model relates to the field of textile waste gas treatment, in particular to a textile material waste gas treatment device.
- VOCs are a type of organic pollutants that are ubiquitous and complex in the air. Collectively, it mainly includes substances such as alkanes, alkenes and aromatic hydrocarbons. Under normal circumstances, these volatile gases will directly form a source of air pollution after they are directly discharged into the atmosphere. In addition, VOCs can also undergo complex photochemical reactions to generate particulate secondary organic aerosols and become one of the important sources of PM2.5.
- the traditional waste gas treatment equipment has poor dust treatment effect in the symmetrical waste gas, which prolongs the dust treatment cycle and reduces the waste gas treatment effect. Therefore, how to quickly treat the dust in the exhaust gas of textile materials has become an urgent problem to be solved.
- the present invention proposes a textile material waste gas treatment device, which can quickly treat the dust in the waste gas, improve the dust treatment efficiency, and at the same time have a good purification and disinfection treatment effect.
- the utility model provides an exhaust gas treatment device for textile materials, which includes an exhaust gas treatment box, an air intake pipe on the lower side of the exhaust gas treatment box, and an air intake fan located on the air intake pipe.
- a disinfection mechanism is provided on the upper side of the box;
- the dust treatment mechanism includes a first stirring shaft and a second stirring shaft.
- the first stirring shaft is rotatably connected to the upper part of the exhaust gas treatment box, and one end of the first stirring shaft passes through the exhaust gas treatment box and the carrying box in turn, and is opposite to the drive shaft of the drive motor.
- the carrying box is installed on one side surface of the exhaust gas treatment box
- the drive motor is installed on one side surface of the carrying box
- the first filter screen is fixedly installed on the first stirring shaft
- the second stirring shaft is rotatably connected to the lower part of the exhaust gas treatment box
- One end of the second stirring shaft penetrates the exhaust gas treatment box and is rotatably connected with the carrying box.
- One end of the first stirring shaft is sleeved with the first pulley, the first pulley is connected with the second pulley through a timing belt, and the second pulley is sleeved and fixed at At one end of the second stirring shaft, a second filter screen is fixedly installed on the second stirring shaft.
- the first filter screens of the three or more groups are arranged on the outer surface of the first stirring shaft in an annular and equidistant manner, and the specifications of the first filter screens of the three or more groups are the same.
- both the drive motor and the air intake fan are connected to the control panel via a connecting wire, and the control panel is installed on one side surface of the exhaust gas treatment box.
- the disinfection mechanism includes a communication tube and a treatment tube, the communication tube is arranged on the upper side of the exhaust gas treatment box, the treatment tube is installed on the upper side of the communication tube, the lower part of the treatment tube is provided with a first HEPA filter element, A second HEPA filter element is arranged in the processing cylinder.
- a first ultraviolet disinfection lamp is installed on the inner wall of the processing cylinder on the upper side of the first HEPA filter element
- a second ultraviolet disinfection lamp, the first ultraviolet disinfection lamp and the second ultraviolet disinfection lamp are installed on the inner wall of the processing cylinder on the upper side of the second HEPA filter element. All are electrically connected to the control panel through connecting wires.
- an exhaust pipe is arranged on the upper side of the processing cylinder, and an evaporator is arranged in the middle of the exhaust pipe.
- first stirring shaft, the second stirring shaft, the first filter screen and the second filter screen it is possible to drive the first stirring shaft and the second stirring shaft through the transmission of the first pulley and the second pulley at the same time Rotating, the first stirring shaft and the second stirring shaft simultaneously drive the first filter screen and the second filter screen to rotate, thereby expanding the contact area between the exhaust gas and the first filter screen and the second filter screen, the first filter screen and the second filter screen Adsorb the dust in the exhaust gas to improve the dust treatment effect.
- the first HEPA filter element and the second HEPA filter element absorb toxic substances in the exhaust gas and perform Purification and disinfection.
- Figure 1 is a schematic structural diagram of a textile material waste gas treatment device proposed by the utility model.
- Fig. 2 is a schematic diagram of the front cross-sectional structure of the waste gas treatment box of a textile material waste gas treatment device proposed by the utility model.
- Figure 3 is a schematic structural diagram of the disinfection mechanism of a textile material waste gas treatment device proposed by the utility model.
- a textile material exhaust gas treatment device proposed by the present invention includes an exhaust gas treatment box 3, an intake pipe 4 located on the lower side of the exhaust gas treatment box 3, and an intake fan 5 located on the intake pipe 4 ,
- a dust treatment mechanism 1 is set in the middle of the waste gas treatment box 3, and a disinfection mechanism 2 is set on the upper side of the waste gas treatment box 3;
- the dust treatment mechanism 1 includes a first stirring shaft 12 and a second stirring shaft 14.
- the first stirring shaft 12 is rotatably connected to the upper part of the waste gas treatment box 3, and one end of the first stirring shaft 12 sequentially penetrates the waste gas treatment box 3 and the carrying box 19, It is connected with the drive shaft of the drive motor 17, the carrying box 19 is installed on the side surface of the exhaust gas treatment box 3, the driving motor 17 is installed on the side surface of the carrying box 19, and the first filter screen 11 is fixedly installed on the first stirring shaft 12.
- the second stirring shaft 14 is rotatably connected to the lower part of the waste gas treatment box 3, and one end of the second stirring shaft 14 penetrates the waste gas treatment box 3 and is rotatably connected to the carrying box 19, and one end of the first stirring shaft 12 is sleeved with the first pulley 18, A pulley 18 is connected to the second pulley 15 through a timing belt 16, and the second pulley 15 is sleeved and fixed at one end of the second stirring shaft 14.
- a second filter screen 13 is fixedly installed on the second stirring shaft 14.
- the first filter There are more than three sets of nets 11, and more than three sets of first filter nets 11 are arranged on the outer surface of the first stirring shaft 12 in an annular and equidistant manner. More than one group, more than three groups of second filter screens 13 are arranged on the outer surface of the second stirring shaft 14 in an annular and equidistant manner, and the specifications of more than three groups of second filter screens 13 are the same.
- the circuit of the driving motor 17 is connected, the driving motor 17 drives the first stirring shaft 12 to rotate, the first stirring shaft 12 drives the first pulley 18 to rotate, and the second pulley 15 drives the second stirring shaft 14 to rotate.
- a stirring shaft 12 and a second stirring shaft 14 rotate at the same time, the first stirring shaft 12 drives the first filter screen 11 to rotate, the second stirring shaft 14 drives the second filter screen 13 to rotate, the first filter screen 11 and the second filter screen 13 Adsorb the dust in the exhaust gas.
- the drive motor 17 and the air intake fan 5 are both connected to the control panel via a connecting wire, and the control panel is installed on one side surface of the exhaust gas treatment box 3.
- the disinfection mechanism 2 includes a communication tube 21 and a treatment tube 22.
- the communication tube 21 is arranged on the upper side of the exhaust gas treatment box 3, and the treatment tube 22 is installed on the upper side of the communication tube 21.
- a first HEPA filter element 28 is provided in the lower part, and a second HEPA filter element 26 is provided in the processing cylinder 22 on the upper side of the first HEPA filter element 28.
- the exhaust gas in the exhaust gas treatment box 3 is transported to the treatment cylinder 22 through the connecting pipe 21, the exhaust gas passes through the first HEPA filter element 28, and the first HEPA filter element 28 performs a primary disinfection treatment on the exhaust gas.
- the exhaust gas passes through the second HEPA The filter element 26 and the second HEPA filter element 26 perform secondary disinfection treatment on the exhaust gas.
- a first ultraviolet disinfection lamp 27 is installed on the inner wall of the treatment barrel 22 on the upper side of the first HEPA filter element 28, and a second ultraviolet disinfection lamp 25 is installed on the inner wall of the treatment barrel 22 on the upper side of the second HEPA filter element 26. Both the first ultraviolet disinfection lamp 27 and the second ultraviolet disinfection lamp 25 are electrically connected to the control panel through a connecting wire.
- first ultraviolet disinfection lamp 27 and the second ultraviolet disinfection lamp 25 are operated, and the first ultraviolet disinfection lamp 27 and the second ultraviolet disinfection lamp 25 perform further disinfection treatment on the exhaust gas.
- an exhaust pipe 23 is provided on the upper side of the processing cylinder 22, and an evaporator 24 is provided in the middle of the exhaust pipe 23.
- the moisture in the exhaust gas can be evaporated to ensure the dryness of the output gas.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
Claims (7)
- 一种纺织材料废气处理装置,其特征在于,包括废气处理箱(3)、位于废气处理箱(3)下侧面上的进气管(4)以及位于进气管(4)上的进气风机(5),废气处理箱(3)内中部设置粉尘处理机构(1),废气处理箱(3)上侧面上设置消毒机构(2);A textile material exhaust gas treatment device, which is characterized in that it comprises an exhaust gas treatment box (3), an intake pipe (4) located on the lower side of the exhaust gas treatment box (3), and an intake fan (5) located on the intake pipe (4) ), a dust treatment mechanism (1) is arranged in the middle of the exhaust gas treatment box (3), and a disinfection mechanism (2) is arranged on the upper side of the exhaust gas treatment box (3);粉尘处理机构(1)包括第一搅拌轴(12)以及第二搅拌轴(14),第一搅拌轴(12)转动连接在废气处理箱(3)内上部,且第一搅拌轴(12)一端依次贯穿废气处理箱(3)以及承载箱(19),并与驱动电机(17)的驱动轴相连接,承载箱(19)安装在废气处理箱(3)一侧表面,驱动电机(17)安装在承载箱(19)一侧表面,第一搅拌轴(12)上固定安装第一过滤网(11),第二搅拌轴(14)转动连接在废气处理箱(3)内下部,且第二搅拌轴(14)一端贯穿废气处理箱(3)并与承载箱(19)转动连接,第一搅拌轴(12)一端套接第一带轮(18),第一带轮(18)通过同步带(16)与第二带轮(15)相连接,第二带轮(15)套接固定在第二搅拌轴(14)一端,第二搅拌轴(14)上固定安装第二过滤网(13)。The dust treatment mechanism (1) includes a first stirring shaft (12) and a second stirring shaft (14). The first stirring shaft (12) is rotatably connected to the upper part of the exhaust gas treatment box (3), and the first stirring shaft (12) One end runs through the exhaust gas treatment box (3) and the carrying box (19) in turn, and is connected to the drive shaft of the driving motor (17). The carrying box (19) is installed on one side surface of the exhaust gas treatment box (3), and the driving motor (17) ) Is installed on one side surface of the carrying box (19), the first filter screen (11) is fixedly installed on the first stirring shaft (12), and the second stirring shaft (14) is rotatably connected to the lower part of the exhaust gas treatment box (3), and One end of the second stirring shaft (14) penetrates the exhaust gas treatment box (3) and is rotatably connected with the carrying box (19). One end of the first stirring shaft (12) is sleeved with the first pulley (18), and the first pulley (18) The second pulley (15) is connected to the second pulley (15) through a timing belt (16), the second pulley (15) is sleeved and fixed on one end of the second stirring shaft (14), and the second filter is fixedly installed on the second stirring shaft (14) Net (13).
- 根据权利要求1所述的一种纺织材料废气处理装置,其特征在于,第一过滤网(11)设有三组以上,三组以上第一过滤网(11)呈环形等距排布在第一搅拌轴(12)外侧面上,且三组以上第一过滤网(11)规格相同。The textile material exhaust gas treatment device according to claim 1, characterized in that the first filter screen (11) is provided with more than three groups, and the first filter screens (11) are arranged in an annular and equidistant manner in the first filter screen (11). On the outer surface of the stirring shaft (12), more than three groups of first filter screens (11) have the same specifications.
- 根据权利要求1所述的一种纺织材料废气处理装置,其特征在于,第二过滤网(13)设有三组以上,三组以上第二过滤网(13)呈环形等距排布在第二搅拌轴(14)外侧面上,且三组以上第二过滤网(13)规格相同。The textile material exhaust gas treatment device according to claim 1, characterized in that the second filter screen (13) is provided with more than three groups, and the second filter screen (13) is arranged in a ring and equidistantly arranged in the second On the outer surface of the stirring shaft (14), more than three sets of second filter screens (13) have the same specifications.
- 根据权利要求1所述的一种纺织材料废气处理装置,其特征在于,驱动电机(17)以及进气风机(5)均通过连接线与控制面板带线连接,控制面板安 装在废气处理箱(3)一侧表面。The textile material exhaust gas treatment device according to claim 1, characterized in that the drive motor (17) and the air intake fan (5) are all connected with the control panel through a cable, and the control panel is installed in the exhaust gas treatment box ( 3) One side surface.
- 根据权利要求1所述的一种纺织材料废气处理装置,其特征在于,消毒机构(2)包括连通管(21)以及处理筒(22),连通管(21)设置在废气处理箱(3)上侧面上,处理筒(22)安装在连通管(21)上侧面上,处理筒(22)内下部设置第一HEPA滤芯(28),第一HEPA滤芯(28)上侧的处理筒(22)内设置第二HEPA滤芯(26)。The textile material exhaust gas treatment device according to claim 1, characterized in that the disinfection mechanism (2) comprises a connecting pipe (21) and a processing tube (22), and the connecting pipe (21) is arranged in the exhaust gas treatment box (3) On the upper side, the processing tube (22) is installed on the upper side of the connecting pipe (21), the first HEPA filter element (28) is arranged in the lower part of the processing tube (22), and the processing tube (22) on the upper side of the first HEPA filter element (28) ) Is provided with a second HEPA filter element (26).
- 根据权利要求5所述的一种纺织材料废气处理装置,其特征在于,第一HEPA滤芯(28)上侧的处理筒(22)内壁上安装第一紫外线消毒灯(27),第二HEPA滤芯(26)上侧的处理筒(22)内壁上安装第二紫外线消毒灯(25),第一紫外线消毒灯(27)以及第二紫外线消毒灯(25)均通过连接线与控制面板电性连接。The textile material exhaust gas treatment device according to claim 5, characterized in that the inner wall of the treatment cylinder (22) on the upper side of the first HEPA filter element (28) is equipped with a first ultraviolet disinfection lamp (27) and a second HEPA filter element (26) A second ultraviolet disinfection lamp (25) is installed on the inner wall of the upper processing cylinder (22), and the first ultraviolet disinfection lamp (27) and the second ultraviolet disinfection lamp (25) are electrically connected to the control panel through a connecting wire .
- 根据权利要求5所述的一种纺织材料废气处理装置,其特征在于,处理筒(22)上侧面上设置排气管(23),且排气管(23)内中部设置蒸发器(24)。The textile material exhaust gas treatment device according to claim 5, characterized in that an exhaust pipe (23) is arranged on the upper side of the treatment cylinder (22), and an evaporator (24) is arranged in the middle of the exhaust pipe (23) .
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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PCT/CN2020/077819 WO2021174454A1 (en) | 2020-03-04 | 2020-03-04 | Waste gas treatment device for textile materials |
DE212020000020.4U DE212020000020U1 (en) | 2020-03-04 | 2020-03-04 | An exhaust treatment device for textile materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2020/077819 WO2021174454A1 (en) | 2020-03-04 | 2020-03-04 | Waste gas treatment device for textile materials |
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WO2021174454A1 true WO2021174454A1 (en) | 2021-09-10 |
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PCT/CN2020/077819 WO2021174454A1 (en) | 2020-03-04 | 2020-03-04 | Waste gas treatment device for textile materials |
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DE (1) | DE212020000020U1 (en) |
WO (1) | WO2021174454A1 (en) |
Cited By (5)
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CN114082529A (en) * | 2021-11-30 | 2022-02-25 | 昌和化学新材料(江苏)有限公司 | Harmless treatment device and method for waste gas generated in triphenyl phosphite production |
CN114133050A (en) * | 2021-11-14 | 2022-03-04 | 湖南荣合汇实验环境设备有限责任公司 | Environmental protection waste water and waste gas treatment equipment for environmental improvement |
CN114405261A (en) * | 2022-01-22 | 2022-04-29 | 连云港百仑生物反应器科技有限公司 | Temperature-controllable constant-pressure bioreactor and method for automatically treating waste gas |
CN114534340A (en) * | 2022-03-08 | 2022-05-27 | 郴州远鸿环保科技发展有限公司 | Multistage filter device for waste residue treatment |
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CN111792239B (en) * | 2020-08-21 | 2022-06-17 | 湖南尚珂伊针纺有限公司 | Textile waste collection device of textile production chemical fiber cloth |
CN112023592B (en) * | 2020-09-10 | 2022-04-01 | 江苏迈阳环保有限公司 | Industrial waste gas environmental protection purifier |
CN113577934A (en) * | 2021-07-24 | 2021-11-02 | 福建斯普达环保科技有限公司 | Bamboo wood dust high efficiency treatment equipment |
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CN115671892A (en) * | 2022-09-09 | 2023-02-03 | 西藏晶啸环保科技有限公司 | Agriculture and forestry resource waste incineration waste gas conveying mechanism |
CN117566975B (en) * | 2024-01-11 | 2024-05-07 | 山东鑫和供水设备有限公司 | Drinking water sterilizing, disinfecting and filtering treatment device |
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- 2020-03-04 WO PCT/CN2020/077819 patent/WO2021174454A1/en active Application Filing
- 2020-03-04 DE DE212020000020.4U patent/DE212020000020U1/en not_active Expired - Lifetime
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