CN108404623A - A kind of high-efficiency purification treatment equipment of exhaust gas - Google Patents
A kind of high-efficiency purification treatment equipment of exhaust gas Download PDFInfo
- Publication number
- CN108404623A CN108404623A CN201810405695.XA CN201810405695A CN108404623A CN 108404623 A CN108404623 A CN 108404623A CN 201810405695 A CN201810405695 A CN 201810405695A CN 108404623 A CN108404623 A CN 108404623A
- Authority
- CN
- China
- Prior art keywords
- chamber
- exhaust gas
- pressure washing
- box
- photodissociation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000746 purification Methods 0.000 title claims abstract description 14
- 230000001699 photocatalysis Effects 0.000 claims abstract description 34
- 239000007921 spray Substances 0.000 claims abstract description 32
- 238000005406 washing Methods 0.000 claims abstract description 28
- 238000006303 photolysis reaction Methods 0.000 claims abstract description 27
- 238000007146 photocatalysis Methods 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 18
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000003463 adsorbent Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 241000628997 Flos Species 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 4
- 239000003610 charcoal Substances 0.000 claims description 3
- 241000220317 Rosa Species 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000007781 pre-processing Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 17
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011941 photocatalyst Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- 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
- B01D53/75—Multi-step processes
-
- 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
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- 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
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
-
- 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
-
- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
Abstract
The present invention provides a kind of high-efficiency purification treatment equipments of exhaust gas, it includes spray column, dried filter box, photodissociation treatment box and photocatalysis treatment case, spray column is divided into level Four processing chamber, spray column includes high-pressure washing chamber, chamber is cleaned again, steam disengagement chamber and primary drying chamber, the top of the high-pressure washing chamber connects inlet channel, gas passes through high-pressure washing chamber successively, chamber is cleaned again, enter dry filter case after steam disengagement chamber and primary drying chamber, enter back into photodissociation treatment box and photocatalysis treatment case, the photocatalysis treatment case is formed by multiple branch mailbox unit spliceds, photocatalysis treatment case side connects air exhauster and blowdown stack.Spray column when pre-processing is divided into level Four processing chamber by the present invention, and the substantially clean organic exhaust gas obtained after level Four is handled can reduce the utilization rate of follow-up equipment, reach energy-efficient purpose, secondly, photodissociation, photocatalysis can be freely combined, it freely adjusts, is conducive to be directed to standardized adjusting.
Description
Technical field
The present invention relates to waste gas treatment equipment field, especially a kind of high-efficiency purification treatment equipment of exhaust gas.
Background technology
With the pay attention to day by day that Environmental is protected, air contaminant treatment has become more and more popular, and industry can wave
Hair has coating cloud and PM2.5 particles, these substances are maximum to people body harm, existing treatment technology be by spray column, filtering,
Plasma, photodissociation, photocatalysis and etc. coating cloud and PM2.5 particles are isolated, so that the exhaust gas of discharge is reached standard.
Although existing each enterprise can accomplish that gas, which is discharged, reaches standard, the requirement to equipment just has obviously
Difference, for example handle early period and be not thorough in spray column, the equipment consumptions such as filtering, plasma, photodissociation, photocatalysis will be increased
Greatly, as the filter element life of filtering reduces, photodissociation, catalysis time lengthening, and in order to which the time for increasing photodissociation, catalysis generally requires
Equipment is done into length, increases cost.Secondly, existing equipment photodissociation, photocatalysis etc. excessively standardize, and are difficult to flexibly transport after design
With being unfavorable for the adjustment in later stage.
Invention content
The purpose of the present invention is being directed to the existing above problem, a kind of high-efficiency purification treatment equipment of exhaust gas is provided.
Object of the invention can be realized by the following technical scheme：A kind of high-efficiency purification treatment equipment of exhaust gas, it is wrapped
Include spray column, dried filter box, photodissociation treatment box and photocatalysis treatment case, which is characterized in that the spray column is divided into level Four
Processing chamber, spray column include high-pressure washing chamber, again cleaning chamber, steam disengagement chamber and primary drying chamber, the high-pressure washing
The top of chamber connects inlet channel, and gas passes through high-pressure washing chamber, cleans chamber, steam disengagement chamber and primary drying chamber again successively
Enter dry filter case afterwards, enters back into photodissociation treatment box and photocatalysis treatment case, the photocatalysis treatment case is by multiple branch mailbox
Unit spliced forms, and photocatalysis treatment case side connects air exhauster and blowdown stack.
Spray head is equipped with above the high-pressure washing chamber, bottom is equipped with discharge orifice, and discharge orifice is passed through in a pond, then
Secondary cleaning chamber is abutted with high-pressure washing chamber, and the side wall below high-pressure washing chamber is equipped with shutter water curtain, the cleaning chamber again
It is inside again provided with spray head, adsorbent equipment is equipped with below spray head, the position of adsorbent equipment is higher than shutter water curtain, cleans chamber again
Top is connected to steam disengagement chamber equipped with air passage, and separating plate is equipped in steam disengagement chamber, and separating plate is kept off in front of air passage, water
Vapour strikes to condense on separating plate and fall, and is equipped with spacing below the separating plate with the bottom of tower of spray column, and gas is from separating plate
Lower section is by the way that primary drying chamber, primary drying chamber is interior to be equipped with the adsorbent equipment laterally intercepted, the top of the primary drying chamber
Equipped with gas outlet.
The high-pressure washing bottom of chamber portion is inclined-plane, and tank floor is also inclined-plane, two inclined-planes it is oblique on the contrary, described
Discharge orifice is located at the lowest point on high-pressure washing chamber inclined-plane.
Chemical fibre silk floss core is equipped in the dried filter box as filtering.
The photodissociation treatment box is docked one by one by multiple photodissociation box units, and ultraviolet light is set in each photodissociation box unit
Source.
It is docked one by one before and after multiple branch mailbox units, branch mailbox unit is the square frame of front and back perforation, in branch mailbox unit
Rear be equipped with photocatalytic plate, for the photocatalytic plate by the front and back closure of branch mailbox unit, the front of photocatalytic plate is equipped with light pipe,
The light pipe is arranged in order from top to bottom, and the spacing between upper and lower two light pipes is in 8~10cm.
The photocatalytic plate is foam ceramic filter, and uniform titanium dioxide, titanium dioxide are sprayed in ceramic filter net surface
Titanium is by high temperature melt in ceramic filter net surface.
The built-in active charcoal of adsorbent equipment.
Compared with prior art, spray column when pre-processing is divided into level Four processing chamber by the present invention, after level Four is handled
Obtained substantially clean organic exhaust gas, can reduce the utilization rate of follow-up equipment, reach energy-efficient purpose.Next, photodissociation,
Photocatalysis can be freely combined, and freely adjust, and be conducive to be directed to standardized adjusting.
Description of the drawings
Fig. 1 is the block schematic illustration of the present invention.
Fig. 2 is the spray column schematic diagram of the present invention.
In figure, 1 air inlet pipe；2 spray heads；3 high-pressure washing chambers；4 shutter water curtains；5 ponds；6 inclined-planes one；7 inclined-planes two；8 mistakes
The mouth of a river；9 adsorbent equipments；10 clean chamber again；11 steam disengagement chambers；12 primary drying chambers；13 separating plates；14 dried filter boxs；
15 photodissociation box units；16 ultraviolet sources；17 branch mailbox units；18 photocatalytic plates；19 light pipes；20 air exhausters；21 blowdown stacks；22 into
Gas port；23 gas outlets.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
Shown in Fig. 1-Fig. 2, the present invention includes spray column, dried filter box 14, photodissociation treatment box and photocatalysis treatment case.
Spray column is divided into level Four processing chamber, and the first order is high-pressure washing chamber 3；The second level is to clean chamber 10 again；The third level
For steam disengagement chamber 11；The fourth stage is primary drying chamber 12.
3 top of high-pressure washing chamber has 22 mouthfuls of air inlet and connection 22 pipe 1 of air inlet, 3 top of high-pressure washing chamber to be equipped with spray head 2,
Bottom is equipped with discharge orifice, and discharge orifice is passed through in a pond 5, and 3 bottom of high-pressure washing chamber is inclined-plane 27, and 5 bottom surface of pond is also oblique
Face 1, two inclined-planes it is oblique on the contrary, the discharge orifice is located at the lowest point on 3 inclined-plane 27 of high-pressure washing chamber, this design
Advantage is：Spray pressure tends to discharge orifice with pressure is flowed to, water-bed in pond 5 to generate bubble rolling, and rubbish is made to roll upwards.
Cleaning chamber 10 is abutted with high-pressure washing chamber 3 again, and the side wall below high-pressure washing chamber 3 is equipped with shutter water curtain 4 and is used for air inlet 22,
It cleans in chamber 10 again and is again provided with spray head 2,2 lower section of spray head is equipped with adsorbent equipment 9, and the position of adsorbent equipment 9 is higher than hundred
Leaf cascade 4 cleans 10 top of chamber and is connected to steam disengagement chamber 11 equipped with air passage, separating plate is equipped in steam disengagement chamber 11 again
13, separating plate 13 is kept off in front of air passage, and for guaranteed efficiency, separating plate 13 and air passage distance are in 20cm~80cm, in this way
Being easy, which makes steam strike, condenses whereabouts on separating plate 13.13 lower section of separating plate and the bottom of tower of spray column is equipped with spacing,
Gas is from 13 lower section of separating plate by the way that primary drying chamber 12, primary drying chamber 12 is interior to be equipped with the adsorbent equipment 9 laterally intercepted, institute
The top for stating primary drying chamber 12 is equipped with gas outlet 23.The built-in active charcoal of above adsorbent equipment 9 cleans chamber 10, water again
The 12 bottom mouths of a river Jun Youguo 8 of vapour disengagement chamber 11 and primary drying chamber make the water of bottom flow to high-pressure washing chamber 3 by crossing the mouth of a river 8.
The substantially clean organic exhaust gas obtained after the level Four processing of spray column, can reduce the utilization rate of follow-up equipment.
Dried filter box 14 was used as in dried filter box 14 equipped with chemical fibre silk floss core in the subsequent handling of spray column
Filter.Moisture and particulate matter can be filtered out, chemical fibre silk floss core has price advantage.
In 14 subsequent handling of dried filter box, a small amount of organic matter is decomposed photodissociation treatment box, passes through photodissociation treatment box
In ultraviolet source 16, it is active by the molecular link photodissociation of the oxygen molecule in organic exhaust gas and air at the organic matter of small molecule
Oxygen-O and extremely strong the hydroxyl radical free radical-OH, active oxygen-O of oxidant and oxygen, which combine to be formed, aoxidizes extremely strong ozone, to locate
Manage organic exhaust gas.Photodissociation treatment box is docked one by one by multiple photodissociation box units 15, is set in each photodissociation box unit 15 ultraviolet
Light source 16.
In photodissociation treatment box subsequent handling, it is divided photocatalysis treatment case by being docked one by one before and after multiple branch mailbox units 17
Box unit 17 is the square frame of front and back perforation, and photocatalytic plate 18, the photocatalytic plate 18 are equipped at the rear of branch mailbox unit 17
The front of the front and back closure of branch mailbox unit 17, photocatalytic plate 18 is equipped with light pipe 19, the light pipe 19 is arranged successively from top to bottom
It arranging, the spacing between upper and lower two light pipes 19 is foam ceramic filter in 8~10cm, photocatalytic plate 18, and foam ceramic filter has stomata,
It is sprayed with uniform titanium dioxide in ceramic filter net surface, titanium dioxide is by high temperature melt in ceramic filter net surface.Dioxy
Change titanium as photocatalyst, in order to make photocatalyst obtain full light irradiation, therefore using the arrangement of lateral light pipe 19, two light pipes
19 spacing have reached optimal illumination spacing in 10cm.Photocatalysis treatment case side connects air exhauster 20 and takes out blowdown stack 21.
An emission concentration standard is set, n is concentration
The babinet length of photocatalysis treatment case can increase reflecting time, when the spacing between upper and lower two light pipes 19 6~
When 10cm, discharge rate is essentially identical, therefore in order to which the cost-effective spacing by between upper and lower two light pipes 19 is in 8~10cm.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (8)
1. a kind of high-efficiency purification treatment equipment of exhaust gas, it includes at spray column, dried filter box, photodissociation treatment box and photocatalysis
Manage case, which is characterized in that the spray column is divided into level Four processing chamber, and spray column includes high-pressure washing chamber, cleans chamber, water again
The top of vapour disengagement chamber and primary drying chamber, the high-pressure washing chamber connects inlet channel, and gas passes through high-pressure washing successively
Chamber enters dry filter case after cleaning chamber, steam disengagement chamber and primary drying chamber again, enters back into photodissociation treatment box and photocatalysis
Treatment box, the photocatalysis treatment case are formed by multiple branch mailbox unit spliceds, photocatalysis treatment case side connect air exhauster and
Blowdown stack.
2. a kind of high-efficiency purification treatment equipment of exhaust gas according to claim 1, which is characterized in that the high-pressure washing
Spray head is equipped with above chamber, bottom is equipped with discharge orifice, and discharge orifice is passed through in a pond, and it is adjacent with high-pressure washing chamber to clean chamber again
It connects, the side wall below high-pressure washing chamber is equipped with shutter water curtain, and the intracavitary of cleaning again is again provided with spray head, spray head
Lower section is equipped with adsorbent equipment, and the position of adsorbent equipment is higher than shutter water curtain, cleans again above chamber and is connected to water equipped with air passage
Vapour disengagement chamber is equipped with separating plate in steam disengagement chamber, and separating plate is kept off in front of air passage, steam strikes condensed on separating plate under
Fall, be equipped with spacing below the separating plate with the bottom of tower of spray column, gas below separating plate by primary drying chamber, just
The adsorbent equipment laterally intercepted is equipped in grade drying chamber, the top of the primary drying chamber is equipped with gas outlet.
3. a kind of high-efficiency purification treatment equipment of exhaust gas according to claim 2, which is characterized in that the high-pressure washing
Bottom of chamber portion is inclined-plane, and tank floor is also inclined-plane, and two inclined-planes oblique is on the contrary, to be located at high-pressure washing chamber oblique for the discharge orifice
The lowest point in face.
4. a kind of high-efficiency purification treatment equipment of exhaust gas according to claim 1 or 2 or 3, which is characterized in that described is dry
Chemical fibre silk floss core is equipped in dry Rose Box as filtering.
5. a kind of high-efficiency purification treatment equipment of exhaust gas according to claim 1 or 2 or 3, which is characterized in that the light
Solution treatment box is docked one by one by multiple photodissociation box units, and ultraviolet source is set in each photodissociation box unit.
6. a kind of high-efficiency purification treatment equipment of exhaust gas according to claim 5, which is characterized in that multiple branch mailbox
It is docked one by one before and after unit, branch mailbox unit is the square frame of front and back perforation, and photocatalytic plate is equipped at the rear of branch mailbox unit, described
Photocatalytic plate by the front and back closure of branch mailbox unit, the front of photocatalytic plate is equipped with light pipe, and the light pipe is from top to bottom successively
It arranges, the spacing between upper and lower two light pipes is in 8~10cm.
7. a kind of high-efficiency purification treatment equipment of exhaust gas according to claim 6, which is characterized in that the photocatalytic plate
For foam ceramic filter, it is sprayed with uniform titanium dioxide in ceramic filter net surface, titanium dioxide is by high temperature melt in ceramic mistake
Screen surface.
8. a kind of high-efficiency purification treatment equipment of exhaust gas according to claim 1 or 2 or 3, which is characterized in that the absorption
The built-in active charcoal of device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810405695.XA CN108404623A (en) | 2018-04-29 | 2018-04-29 | A kind of high-efficiency purification treatment equipment of exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810405695.XA CN108404623A (en) | 2018-04-29 | 2018-04-29 | A kind of high-efficiency purification treatment equipment of exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108404623A true CN108404623A (en) | 2018-08-17 |
Family
ID=63137372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810405695.XA Pending CN108404623A (en) | 2018-04-29 | 2018-04-29 | A kind of high-efficiency purification treatment equipment of exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108404623A (en) |
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| CN208493771U (en) * | 2018-04-29 | 2019-02-15 | 浙江瑞鑫环保设备有限公司 | A kind of high-efficiency purification treatment equipment of exhaust gas |
-
2018
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| CN2562845Y (en) * | 2002-08-29 | 2003-07-30 | 冯长青 | Water cleaning filtering air exhaust device |
| CA2685256A1 (en) * | 2007-05-17 | 2008-11-17 | Garfield Industries, Inc. | System and method for photocatalytic oxidation air filtration using a substrate with photocatalyst particles powder coated thereon |
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Application publication date: 20180817 |