CN105944557B - Photocatalytic air purifier - Google Patents
Photocatalytic air purifier Download PDFInfo
- Publication number
- CN105944557B CN105944557B CN201610316244.XA CN201610316244A CN105944557B CN 105944557 B CN105944557 B CN 105944557B CN 201610316244 A CN201610316244 A CN 201610316244A CN 105944557 B CN105944557 B CN 105944557B
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- cylinder
- air purifier
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- 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
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Toxicology (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
A photocatalytic air purifier comprises a vertical first cylinder (1), wherein an air outlet is formed in the top end of the first cylinder (1); the bottom end of the first cylinder (1) is closed; the inner wall of the first cylinder (1) is bulged, a ring flange (11) is formed, and an air inlet (12) is formed in the wall surface, located below the ring flange (11), of the first cylinder (1); multiple limit blocks (13) are bulged on the inner wall of the ring flange (11); the air purifier further comprises a cover (30), a cover opening of the cover (30) is in seamless joint with the air outlet, and an ultraviolet lamp (33) is arranged in the cover (30); a photocatalytic mesh (32) occupying the whole section of the cover opening of the cover (30) and used for purifying airflow under the irradiation of the ultraviolet lamp (33) is arranged on the cover (30); outlets (31) are formed in the wall surface of one side, where the photocatalytic mesh (32) faces the ultraviolet lamp (33), of the cover (30). The air purifier is ingenious in design, high in dust collection efficiency, economical and practical.
Description
Technical field
The present invention relates to a kind of photo-catalytic air cleaner.
Background technology
Existing air purifier structure mostly using plain gauze in combination with photocatalyst net, using plain gauze pair
Air is tentatively filtered, then PM2.5 particles, harmful organic principle in air etc. are eliminated using photocatalyst net.This air
After long-term use, plain gauze can be covered with dust all over clarifier, so as to reduce air purification efficiency.Meanwhile, photocatalyst net is necessary
Could be filtered in the case of contacting with PM2.5 particles and harmful organic principle.And in filter screen after long term wear, it is empty
Some of gas bulky grain can leak through filter screen, and be attached on photocatalyst net, so as to reduce the contact surface of photocatalyst net and air,
So as to affect the elimination efficiency of PM2.5 particles and harmful organic principle.Also, these bulky grains also can grind in the presence of air-flow
Damage photocatalyst net.
The content of the invention
For existing air purifier after long-term use, plain gauze can be covered with dust all over the present invention, so as to reduce air
Purification efficiency, meanwhile, in filter screen after long term wear, some of air bulky grain can leak through filter screen, and be attached to photocatalyst
On the net, so as to reducing the problem of the contact surface of photocatalyst net and air, it is proposed that a kind of air purifier.
Technical scheme proposed by the invention is as follows：
The present invention proposes a kind of air purifier, and including the first cylinder being vertically arranged, first cylinder top has
Air outlet；The first cylinder bottom end closure, so that the first cylinder body bottom forms the holding tank for accommodating dedusting liquid；This first
In vivo wall protrusion is formed with collar flange, and first cylinder offers air inlet on the wall below collar flange；
Collar flange inwall is protruded above and is formed with multiple limited blocks；The plurality of limited block interval setting simultaneously surrounds centre bore；
Air purifier also includes piston, and the piston includes being slidably disposed in the second cylinder in centre bore, and this
Turn up to form the ring-type limiting section being separably supported on collar flange in two cylinders top；Air purifier also includes being arranged on
Second inner barrel simultaneously occupies the screen pack of the second inner barrel whole cross section；
Air purifier also includes being arranged in the first cylinder top inner wall, for producing by air intake in the first inner barrel
Fan component of the mouth to the air-flow of air outlet flowing；Air purifier also include be arranged on the first cylinder under collar flange
On the inwall of side, for monitoring the displacement transducer of the slide displacement of piston；
Air purifier also includes pipeline and is arranged in the first cylinder and the shower nozzle above piston, pipeline one end
It is connected with shower nozzle, the other end is connected with holding tank；Air purifier also includes being arranged on pipeline, for working as displacement transducer
The suction pump aspirated the dedusting liquid in holding tank when detecting piston upward sliding and make the dedusting liquid spray from shower nozzle；
Air purifier also includes cover, and cover mouth and the air outlet slitless connection of the cover are provided with uviol lamp in cover；
Be provided with cover and occupy the cover cover mouth whole cross section, for the photocatalyst net of the purifying gas flow under the irradiation of uviol lamp；Cover
Sub offers outlet positioned at photocatalyst net towards on the wall of uviol lamp side.
In the above-mentioned air purifier of the present invention, also including the control being electrically connected with displacement transducer and suction pump respectively
Device；The controller is used for after the alarm signal sent when displacement transducer is received because of piston upward sliding, starts suction
Pump is sprayed with driving dedusting liquid from shower nozzle.
In the above-mentioned air purifier of the present invention, fan component includes the support being arranged on the first cylinder inboard wall, can turn
The blade being arranged on dynamicly on support, output shaft is connected with blade, the first motor for driving blade and with the first motor
Electric connection, the speed changer for changing blade rotational speed.
In the above-mentioned air purifier of the present invention, screen pack is the wire netting of the mesh of 150 mesh -300.
In the above-mentioned air purifier of the present invention, screen pack includes one or more layers wire netting.
In the above-mentioned air purifier of the present invention, dedusting liquid is water, faintly acid salt solution, weak acid, alkalescent salt solution or weak base.
It is also on the inwall of the first cylinder and convex positioned at ring-type including being separately positioned in the above-mentioned air purifier of the present invention
Edge top, for preventing piston from sliding into the multiple blocks outside centre bore.
In the above-mentioned air purifier of the present invention, multiple limited block spaced sets.
The preliminary filter process of air of the air purifier of the present invention takes into account filtering type process of cleaning and spray for dust suppression method simultaneously
Advantage；Specifically, when dust is less, cleared up using filtering type process of cleaning；When dust is more, removed using spraying
Dirt method is cleared up.By arranging piston, carry out the quantity of automatic decision dust, realize the switching between two kinds of dedusting methods.This
The air-purifier designs of invention are ingenious, and good air purification effect is economical and practical.
Description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 shows the schematic diagram of the air purifier of the embodiment of the present invention；
Fig. 2 shows the use state of the air purifier shown in Fig. 1 with reference to figure.
Specific embodiment
The technical problem to be solved in the present invention is：After long-term use, plain gauze can be covered with ash to existing air purifier
Dirt, so as to reduce air purification efficiency, meanwhile, in filter screen after long term wear, some of air bulky grain can leak through filter screen,
And be attached on photocatalyst net, so as to reduce the contact surface of photocatalyst net and air.Solution technical problem proposed by the present invention
Technical thought be：A kind of air purifier is constructed, the preliminary filter process of air of the air purifier takes into account filtering type simultaneously
The advantage of process of cleaning and spray for dust suppression method；Specifically, when dust is less, cleared up using filtering type process of cleaning；Work as ash
When dirt is more, cleared up using spray for dust suppression method.Air purification efficiency is reduced so as to avoid after plain gauze is covered with dust all over
Situation.
Below in conjunction with the accompanying drawings and the specific embodiments the present invention is described in further detail.
As shown in figure 1, Fig. 1 shows the schematic diagram of the air purifier of the embodiment of the present invention.The air purifier includes
The first cylinder 1 being vertically arranged, the top of the first cylinder 1 has air outlet；The bottom end closure of first cylinder 1, so that first
Holding tank for accommodating dedusting liquid is formed on the bottom of body 1；Wherein, different according to the chemical composition of dust, dedusting liquid can be water, weak
Acid brine, weak acid, alkalescent salt solution or weak base etc..
The inwall of first cylinder 1 protrusion is formed with collar flange 11, the wall positioned at the lower section of flange 11 of first cylinder 1
On offer air inlet 12.The air inlet 12 can have 1, or multiple.
The inwall of collar flange 11 is protruded above and is formed with multiple limited blocks 13；The plurality of limited block 13 interval setting is simultaneously surrounded
Heart hole；In the present embodiment, the horizontal cross-section of each limited block 13 is into arcuation, so, during multiple limited blocks 13 are surrounded
Heart hole is circular port.It is appreciated that according to design needs, centre bore can also be square hole, tri-angle-holed etc., correspondingly,
The horizontal cross-section of limited block 13 can into strips or point-like etc..
Air purifier also includes piston 2, and the piston 2 includes the second cylinder 21 being slidably disposed in centre bore,
Turn up to form the ring-type limiting section 22 being separably supported on collar flange 11 in the top of second cylinder 21；When ring-type limiting section
22 when being supported on collar flange 11, just very close to each other between collar flange 11 and piston 2；
Air purifier also includes being arranged on the inside of the second cylinder 21 and occupying the inside whole cross section of the second cylinder 21
Screen pack 4；When the upward sliding of piston 2, when ring-type limiting section 22 is separated with collar flange 11, the first cylinder 1 positioned at ring-type
The space positioned at the lower section of collar flange 11 of the space of the top of flange 11 and the first cylinder 1 just can by multiple limited blocks 13 it
Between gap effectively connected.
Air purifier also includes being arranged in the top inner wall of the first cylinder 1, for producing inside the first cylinder 1 by entering
The fan component 8 of the air-flow that air port 12 is flowed to air outlet；Air purifier also include be arranged on the first cylinder 1 positioned at ring-type
On the inwall of the lower section of flange 11, for monitoring the displacement transducer 9 of the slide displacement of piston 2；
Air purifier also includes pipeline 6 and is arranged in the first cylinder 1 and positioned at the shower nozzle 5 of the top of piston 2, pipeline
6 one end are connected with shower nozzle 5, and the other end is connected with holding tank；Air purifier also includes being arranged on pipeline 6, for working as position
The dedusting liquid in holding tank is aspirated when displacement sensor 9 detects 2 upward sliding of piston and the dedusting liquid is made from taking out that shower nozzle 5 sprays
Sucking pump 7.
In order to realize the automation pumping function of suction pump 7, air purifier also include respectively with displacement transducer 9 and take out
The controller (not shown) that sucking pump 7 is electrically connected with.The controller is used to receive displacement transducer 9 because of piston 2 upwards
After the alarm signal sent during slip, start suction pump 7 to drive dedusting liquid to spray from shower nozzle 5.
Further, air purifier also includes cover 30, cover mouth and the air outlet slitless connection of the cover 30, cover 30
Inside it is provided with uviol lamp 33；Be provided with cover 30 and occupy the cover mouth whole cross section of cover 30, in the irradiation of uviol lamp 33
The photocatalyst net 32 of lower purifying gas flow；Cover 30 is offered out positioned at photocatalyst net 32 towards on the wall of the side of uviol lamp 33
Mouth 31.In the present embodiment, photocatalyst net 27 includes the wire netting of 3-40 mesh, and the photocatalyst being attached on metal net surface
Layer.The photocatalyst layer can be nano-TiO2、ZnO、CdS、WO3、Fe2O3、PbS、SnO2、ZnS、SrTiO3、SiO2In one kind.
Photocatalyst layer can occur light-catalyzed reaction under ultraviolet irradiation, so as to filter in pipeline 1 by the air-flow of photocatalyst net 27
In PM2.5, organic principle etc..
By above-mentioned technical proposal, when screen pack 4 is not blocked by dust and fan component 8 brings into operation, air-flow meeting
By air inlet 12, through the stream of filter screen 4 to air outlet.Now, the dust entrained by air-flow is only filtered by filtering type process of cleaning
Remove.After excessive dust is have accumulated on screen pack 4, screen pack 4 can be partially or completely inaccessible；As fan component 8 continues to transport
OK, the space positioned at the top of collar flange 11 of the first cylinder 1 can produce negative pressure, so as to cause the upward sliding of piston 2.Now,
Air-flow can by air inlet 12, between Jing limited blocks 13 between clearance flow to air outlet.At the same time, when 2 upward sliding of piston,
Dedusting liquid can spray from shower nozzle 5, can be by the dedusting from the dust entrained by the air-flow that the gap between limited block 13 is flowed out
Liquid is adhered to, and is re-flowed under gravity in holding tank.Now, the dust in air-flow is by spray for dust suppression method
Filtered.Meanwhile, under gravity, the dedusting liquid sprayed from shower nozzle 5 is also fallen on screen pack 4, can be by screen pack 4
On dust be punched in holding tank so that the mesh on screen pack 4 is reopened.When fan component 8 quits work, piston
2 under gravity, and slide downward is supported on collar flange 11 until ring-type limiting section 22.
Further, fan component 8 includes the support 81 being arranged on the inwall of the first cylinder 1, is rotatably arranged in and props up
Blade 82 on frame 81, output shaft is connected with blade 82, the first motor (not shown) for driving blade 82 and with
First motor is electrically connected with, the speed changer (not shown) for changing the rotating speed of blade 82.This fan is existing structure, this
In just do not repeat one by one.Using screen pack 4 to filter air in dust, its efficiency is too low, therefore, now, just can adopt
Speed changer tunes up the rotating speed of blade 82, so, it is also possible to produce the space positioned at the top of collar flange 11 in the first cylinder 1
Raw negative pressure, so that the upward sliding of piston 2, and then starting suction pump 7, realization carries out spray for dust suppression to the dust in air.
Further, screen pack 4 can be the wire netting of the mesh of 150 mesh -300, can include one or more layers wire netting.
Further, displacement transducer 9 is also called linear transducer, be it is a kind of belong to metal sensing linear unit, position
The effect of displacement sensor is that various measurands are converted to electricity.In process of production, the measurement of displacement is generally divided into survey
Two kinds of amount full size and mechanical displacement.The form converted by measured variable is different, and displacement transducer can be divided into analog sum
Two kinds of word formula.It is analog and can be divided into two kinds of physical property type and structural type.Conventional displacement transducer is in the majority with analog structure type, bag
Include potentiometric displacement transducer, inductive displacement transducer, selsyn, capacitive displacement transducer, electric vortex type displacement
Sensor, Hall displacement transducer etc..Displacement transducer 9 is mainly used in for the displacement of the upward sliding of piston 2 being converted to warning
Signal, and the alarm signal is sent to into controller, controller drives suction pump 7 further according to alarm signal.It should be noted that
In the present embodiment, alarm signal is current signal, and controller is mainly current amplifier, and its effect is to pass through alarm signal
Process and amplify, the solenoid of the signal after amplification and then control and suck pump 7 carries out aspirating dedusting liquid so as to start suction pump 7.
Controller can also be simple amplifier, it would however also be possible to employ the controller that CPU is constituted.Due in the present invention, the controller
Do not seek protection, just specifically do not repeat.
Further, as depicted in figs. 1 and 2, air purifier also include be separately positioned on the inwall of the first cylinder 1 and
Positioned at the top of collar flange 11, for preventing piston 2 from sliding into the multiple blocks 3 outside centre bore.It is appreciated that the plurality of block 3
Between between be separated with gap, when piston 2 slides up to withstand block 3, air-flow can pass through from the gap between block 3.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or be converted,
And all these modifications and variations should all belong to the protection domain of claims of the present invention.
Claims (8)
1. a kind of air purifier, it is characterised in that including the first cylinder (1) being vertically arranged, the first cylinder (1) top tool
There is air outlet；First cylinder (1) bottom end closure, so that the holding tank for accommodating dedusting liquid is formed on the first cylinder (1) bottom；
First cylinder (1) inwall protrusion is formed with collar flange (11), first cylinder (1) below collar flange (11)
Air inlet (12) is offered on wall；
Collar flange (11) inwall is protruded above and is formed with multiple limited blocks (13)；The plurality of limited block (13) interval setting is simultaneously surrounded
Centre bore；
Air purifier also includes piston (2), and the piston (2) is including the second cylinder being slidably disposed in centre bore
(21), the second cylinder (21) top turns up to form the ring-type limiting section (22) being separably supported on collar flange (11)；
Air purifier also includes the filtration for being arranged on the second cylinder (21) inside and occupying the internal whole cross section of second cylinder (21)
Net (4)；
Air purifier also includes being arranged in the first cylinder (1) top inner wall, for producing inside the first cylinder (1) by entering
The fan component (8) of the air-flow that air port (12) is flowed to air outlet；Air purifier also includes being arranged on the position of the first cylinder (1)
On inwall below collar flange (11), for monitoring the displacement transducer (9) of the slide displacement of piston (2)；
Air purifier also includes pipeline (6) and is arranged in the first cylinder (1) and the shower nozzle (5) above piston (2),
Pipeline (6) one end is connected with shower nozzle (5), and the other end is connected with holding tank；Air purifier also includes being arranged on pipeline (6),
For the dedusting liquid in holding tank to be aspirated when displacement transducer (9) detects piston (2) upward sliding and the dedusting liquid is made
From the suction pump (7) that shower nozzle (5) sprays；
Air purifier also includes cover (30), and cover mouth and the air outlet slitless connection of the cover (30) are arranged in cover (30)
There is uviol lamp (33)；Be provided with cover (30) and occupy cover (30) the cover mouth whole cross section, in the photograph of uviol lamp (33)
Penetrate the photocatalyst net (32) of lower purifying gas flow；Cover (30) positioned at photocatalyst net (32) towards uviol lamp (33) side wall
On offer outlet (31).
2. air purifier according to claim 1, it is characterised in that also including respectively with displacement transducer (9) and take out
The controller that sucking pump (7) is electrically connected with；The controller is used for when displacement transducer (9) is received because of piston (2) upward sliding
After the alarm signal for being sent, start suction pump (7) to drive dedusting liquid to spray from shower nozzle (5).
3. air purifier according to claim 1 and 2, it is characterised in that fan component (8) is including being arranged on first
Support (81) on body (1) inwall, the blade (82) being rotatably arranged on support (81), output shaft is with blade (82) even
Connect, the first motor for driving blade (82) and with the first motor be electrically connected with, the change for changing blade (82) rotating speed
Fast device.
4. air purifier according to claim 1 and 2, it is characterised in that screen pack (4) is the gold of the mesh of 150 mesh -300
Category net.
5. air purifier according to claim 1 and 2, it is characterised in that screen pack (4) is including one or more layers metal
Net.
6. air purifier according to claim 1 and 2, it is characterised in that dedusting liquid be water, faintly acid salt solution, weak acid,
Alkalescent salt solution or weak base.
7. air purifier according to claim 1 and 2, it is characterised in that also including being separately positioned on the first cylinder (1)
Inwall on and positioned at collar flange (11) top, for preventing piston (2) from sliding into the multiple blocks (3) outside centre bore.
8. air purifier according to claim 1 and 2, it is characterised in that multiple limited block (13) spaced sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610316244.XA CN105944557B (en) | 2016-05-12 | 2016-05-12 | Photocatalytic air purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610316244.XA CN105944557B (en) | 2016-05-12 | 2016-05-12 | Photocatalytic air purifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105944557A CN105944557A (en) | 2016-09-21 |
| CN105944557B true CN105944557B (en) | 2017-05-03 |
Family
ID=56912586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610316244.XA Active CN105944557B (en) | 2016-05-12 | 2016-05-12 | Photocatalytic air purifier |
Country Status (1)
| Country | Link |
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| CN (1) | CN105944557B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110772985B (en) * | 2019-11-18 | 2024-05-24 | 湖南省约伯能源科技有限公司 | Catalyst loader and denitration reaction device with same |
| CN111482081B (en) * | 2020-04-23 | 2021-09-24 | 四川旅游学院 | Indoor air purification device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201179218Y (en) * | 2008-03-21 | 2009-01-14 | 蔡炯锡 | Air purifier |
| CN101590253A (en) * | 2008-05-27 | 2009-12-02 | 北京道顺国际技术开发有限责任公司 | Vertical air multiple purifying and washing and damping machine |
| JP2012200592A (en) * | 2011-03-24 | 2012-10-22 | Tsinghua Univ | Toxic substance removing device and air cleaning device using the same |
| CN205037427U (en) * | 2015-08-19 | 2016-02-17 | 陈婷婷 | Automatic clearance formula air purifier |
| CN205156169U (en) * | 2015-11-05 | 2016-04-13 | 北京森贝恩环保科技有限公司 | Photocatalysis air cleaning device |
-
2016
- 2016-05-12 CN CN201610316244.XA patent/CN105944557B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201179218Y (en) * | 2008-03-21 | 2009-01-14 | 蔡炯锡 | Air purifier |
| CN101590253A (en) * | 2008-05-27 | 2009-12-02 | 北京道顺国际技术开发有限责任公司 | Vertical air multiple purifying and washing and damping machine |
| JP2012200592A (en) * | 2011-03-24 | 2012-10-22 | Tsinghua Univ | Toxic substance removing device and air cleaning device using the same |
| CN205037427U (en) * | 2015-08-19 | 2016-02-17 | 陈婷婷 | Automatic clearance formula air purifier |
| CN205156169U (en) * | 2015-11-05 | 2016-04-13 | 北京森贝恩环保科技有限公司 | Photocatalysis air cleaning device |
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| Publication number | Publication date |
|---|---|
| CN105944557A (en) | 2016-09-21 |
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Inventor after: Liu Shu Inventor before: Liu Jin |
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Effective date of registration: 20170309 Address after: 510000, Guangdong, Guangzhou, Nansha District, Wan Qing Sha Guangzhou bonded port area processing zone, the third floor of the Administrative Committee on 302G (limited office use) () Applicant after: Guangzhou Lang Environmental Protection Technology Co., Ltd. Address before: 430034 Hubei province in Qiaokou District of Wuhan city Gutian four road Changhua apartment building 2 1 unit 902 Applicant before: Liu Jin |
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