CN110756046A - Photocatalyst air purification membrane group - Google Patents
Photocatalyst air purification membrane group Download PDFInfo
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- CN110756046A CN110756046A CN201911084114.8A CN201911084114A CN110756046A CN 110756046 A CN110756046 A CN 110756046A CN 201911084114 A CN201911084114 A CN 201911084114A CN 110756046 A CN110756046 A CN 110756046A
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- Prior art keywords
- photocatalyst
- air purification
- light source
- purification membrane
- air
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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
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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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
- B01D53/007—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/91—Bacteria; Microorganisms
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a photocatalyst air purification membrane group, which comprises: the photocatalyst main body is used for carrying out photocatalysis on air to be treated and consists of porous ceramic foam and photocatalyst coated on the surface of the ceramic porous ceramic foam; and at least one ultraviolet light source arranged outside the photocatalyst main body, wherein the light source direction of the ultraviolet light source and the flowing direction of the air to be treated are arranged in a mutually crossed manner. According to the photocatalyst air purification membrane group, ceramic foam is used for replacing a honeycomb ceramic membrane in the existing air purification membrane group, the position of a light source is changed, so that the flowing direction of air to be treated and the light irradiation direction are crossed, the distance between the light source and the photocatalyst membrane is closer, the attenuation of light energy is reduced, the photocatalyst reaction efficiency is improved, and volatile organic compounds are efficiently removed by the air purification membrane group.
Description
Technical Field
The invention relates to the field of air purification, in particular to a photocatalyst air purification membrane group.
Background
With the development of economy and high population density, various pollutants and harmful components in the air are increasing, and such pollutants include dust, volatile organic compounds, smoke, bacteria, and the like. Various air purification membrane groups are produced in order to obtain clean air.
The main working principles of air purification include filtration, adsorption, decomposition, etc. For volatile organic compounds in the air, methods such as activated carbon adsorption, ozone and ultraviolet irradiation light contact and the like are mainly adopted at present. Compared with other methods, the activated carbon is slightly cheap, but the activated carbon has the defect of saturated adsorption, and volatile organic compounds adsorbed into the activated carbon are difficult to discharge again, so that the persistence is greatly reduced. The ozone substance generated by the ozone method is harmful to human bodies, and although the concentration of the ozone substance is greatly reduced by the related inventions recently, the harm to the human bodies can be minimized, the problem is not solved fundamentally. At present, the method for irradiating photocatalyst by ultraviolet can solve the problem of low efficiency of the activated carbon adsorption method and the limitation of excess ozone, and is the safest and effective method for removing volatile organic compounds in the air purification membrane group
The photocatalyst is a generic name for a photo-semiconductor material having a photocatalytic function represented by nano-sized titanium dioxide. When it is coated on the surface of base material, under the action of ultraviolet ray irradiation, the photocatalyst can produce strong catalytic degradation function, so that it can effectively degrade toxic and harmful gas in the air and kill several bacteria. As shown in fig. 1, in the air purifier sold in the market at present, the light irradiation direction of the ultraviolet light source and the air flowing direction are parallel to each other, and the heat generated in the light source is transferred to the photocatalyst film; a certain distance is reserved between the photocatalyst film and the ultraviolet light source, so that the light energy is weakened, and the reaction efficiency of the photocatalyst is reduced; the used coating substrate is a honeycomb ceramic membrane, and sometimes a light source cannot accurately irradiate into small partition sections of a honeycomb structure, so that the photocatalyst reaction efficiency is influenced.
In order to solve the above problems, the present invention provides a photocatalyst air purification membrane module.
Disclosure of Invention
In order to achieve the purpose, the invention provides a photocatalyst air purification membrane group, which utilizes ceramic foam to replace a honeycomb ceramic membrane in the existing air purification membrane group, and changes the position of an ultraviolet light source to enable the air flow direction and the light irradiation direction to be mutually crossed and arranged, so that the distance between the light source and the photocatalyst membrane is closer, the attenuation of light energy is reduced, the photocatalyst reaction efficiency is improved, and the effect of removing volatile organic compounds by the air purification membrane group is better.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a photocatalyst air purification membrane group, which comprises:
the photocatalyst main body is used for carrying out photocatalysis on air to be treated and consists of porous ceramic foam and photocatalyst coated on the surface of the ceramic porous ceramic foam; and
and the light source direction of the ultraviolet light source and the flowing direction of the air to be treated are arranged in a mutually crossed manner.
Further, the illumination direction of the ultraviolet light source is perpendicular to the flowing direction of the air to be treated.
Further, the photocatalyst is nano titanium dioxide.
Further, the porous ceramic foam is white and has a pore size of 8-32 PPI.
Further, the distance between the ultraviolet light source and the edge of the photocatalyst is 10-45 mm.
Further, the wavelength of the ultraviolet light source is 320nm-400 nm.
Furthermore, the ultraviolet light sources are LED ultraviolet light emitting diodes, and the number of the LED ultraviolet light emitting diodes is 1-10.
Further, the air to be treated contains one or more of VOCs, ethylene and ammonia gas.
Further, the photocatalyst air purification membrane group further comprises: and the fan is used for conveying the air to be treated to pass through the photocatalyst main body.
Further, the photocatalyst air purification membrane group further comprises: further comprising: at least one UVC light source, which is used for deodorizing and sterilizing the air to be treated.
Compared with the prior art, the invention has the following advantages:
according to the photocatalyst air purification membrane group, ceramic foam is used for replacing a honeycomb ceramic membrane in the existing air purification membrane group, the position of a light source is changed, so that the flowing direction of air to be treated and the light irradiation direction are crossed, the distance between the light source and the photocatalyst membrane is closer, the attenuation of light energy is reduced, the photocatalyst reaction efficiency is improved, and volatile organic compounds are efficiently removed by the air purification membrane group.
Drawings
FIG. 1 is a schematic view of a common air purification membrane module in the market;
FIG. 2 is a schematic view of a photocatalyst air purification membrane module according to the present invention;
FIG. 3 is a schematic illustration of a honeycomb ceramic membrane and ceramic foam;
fig. 4 is a schematic view of the working principle of the air purification membrane module of the present invention.
Detailed Description
The present invention will be described in detail and specifically with reference to the following examples to facilitate better understanding of the present invention, but the following examples do not limit the scope of the present invention.
Fig. 2 is a diagram of a photocatalyst air purification membrane module provided in an embodiment of the present invention, including:
the photocatalyst main body is used for carrying out photocatalysis on air to be treated and consists of porous ceramic foam and photocatalyst coated on the surface of the ceramic porous ceramic foam; and
and the light source direction of the ultraviolet light source and the flowing direction of the air to be treated are arranged in a mutually crossed manner.
The coating substrate is a photocatalyst main body of ceramic foam, so that the problem that when the coating substrate is a honeycomb ceramic membrane, a light source cannot accurately irradiate into a small partition section of a honeycomb structure sometimes to influence the reaction efficiency of the photocatalyst is solved, and the reaction efficiency of the photocatalyst is improved;
the light source is arranged vertically to the flowing direction of the air to be treated, the distance between the ultraviolet light source and the edge of the photocatalyst is 10-45mm, so that the distance between the light source and the photocatalyst film is shorter, the attenuation of light energy is reduced, heat generated in the ultraviolet light source is prevented from being transferred to the photocatalyst main body, and the reaction efficiency of the photocatalyst is improved.
As a preferred embodiment, the wavelength of the ultraviolet light source is 320nm-400nm, the ultraviolet light source is an LED ultraviolet light emitting diode, the number of the ultraviolet light emitting diodes is 1-10, the ultraviolet light can be fully covered on the photocatalyst main body, and the photocatalyst reaction efficiency is improved; the driving voltage of the LED ultraviolet light emitting diode is 3.4-3.8V.
As a preferred embodiment, as shown in fig. 4, the photocatalyst air purification membrane module further includes: at least one UVC light source, which is used for deodorizing and sterilizing the air to be treated.
As a preferred embodiment, the pore size of the porous ceramic foam is 8-32PPI, and the thickness of the ceramic foam is 5-10 mm. Table 1 shows the light passage distances and the pairs of CO, EtOH, H for ceramic foam photocatalyst films of different PPIs2And (4) removing effect of S.
TABLE 1
The higher PPI is seen to provide increased directional resistance to the passage of the air to be treated, which provides sufficient reaction time for the reaction of the air to be treated with the titanium dioxide in the ceramic foam, resulting in a greatly increased removal rate.
Comparative example
Table 2 shows the honeycomb ceramic photocatalyst membrane pairs of CO, EtOH, H for different Honey comb cells2And (4) removing effect of S.
TABLE 2
The photocatalyst film of the honeycomb ceramic film can not accurately irradiate light into the small partition section, and can not excite light-contact reaction at the position which can not be irradiated, thereby influencing the efficiency of the photocatalyst reaction.
The photocatalyst air purification membrane group can be used for removing formaldehyde, odor and VOC in an air conditioner or a ventilation exhaust pipeline; the toilet mat is arranged around a toilet or a pet defecation mat to remove odor such as ammonia gas and the like; it can be used for removing ethylene gas generated in fruit, and prolonging storage time of fruit.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A photocatalyst air purification membrane group is characterized by comprising:
the photocatalyst main body is used for carrying out photocatalysis on air to be treated and consists of porous ceramic foam and photocatalyst coated on the surface of the ceramic porous ceramic foam; and
and the light source direction of the ultraviolet light source and the flowing direction of the air to be treated are arranged in a mutually crossed manner.
2. The photocatalyst air purification membrane module as claimed in claim 1, wherein the illumination direction of the ultraviolet light source is perpendicular to the flow direction of the air to be treated.
3. The photocatalyst air purification membrane module as claimed in claim 1, wherein the photocatalyst is nano-titania.
4. The photocatalyst air purification membrane module as claimed in claim 1, wherein the porous ceramic foam is white and has a pore size of 8-32 PPI.
5. The photocatalyst air purification membrane module as claimed in claim 1, wherein the distance between the uv light source and the photocatalyst edge is 10-45 mm.
6. The photocatalyst air purification membrane module as claimed in claim 1, wherein the wavelength of the ultraviolet light source is 320nm-400 nm.
7. The photocatalyst air purification membrane module as claimed in claim 1, wherein the number of the ultraviolet light sources is 1-10 LED.
8. The photocatalyst air purification membrane assembly as claimed in claim 1, wherein the air to be treated contains one or more of VOCs, ethylene and ammonia.
9. The photocatalyst air purification membrane module as claimed in claim 1, further comprising:
and the fan is used for conveying the air to be treated to pass through the photocatalyst main body.
10. The photocatalyst air purification membrane module as claimed in claim 1, further comprising:
at least one UVC light source, which is used for deodorizing and sterilizing the air to be treated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911084114.8A CN110756046A (en) | 2019-11-07 | 2019-11-07 | Photocatalyst air purification membrane group |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911084114.8A CN110756046A (en) | 2019-11-07 | 2019-11-07 | Photocatalyst air purification membrane group |
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| Publication Number | Publication Date |
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| CN110756046A true CN110756046A (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911084114.8A Pending CN110756046A (en) | 2019-11-07 | 2019-11-07 | Photocatalyst air purification membrane group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4331721A1 (en) | 2022-08-31 | 2024-03-06 | Calistair SAS | Catalytic system with photocatalyst and gas depollution apparatus containing the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004024461A (en) * | 2002-06-25 | 2004-01-29 | Denso Corp | Air cleaner |
| CN2619632Y (en) * | 2003-05-15 | 2004-06-09 | 南海市华星光电实业有限公司 | Indoor air purifier |
| CN205014509U (en) * | 2014-09-30 | 2016-02-03 | 首尔伟傲世有限公司 | Photocatalyst ball filter and utilize its air purification system |
| CN108452362A (en) * | 2018-06-21 | 2018-08-28 | 广东美的环境电器制造有限公司 | Sterilize module and disinfection equipment |
| CN109569275A (en) * | 2018-11-20 | 2019-04-05 | 杭州爱净科技有限公司 | Photocatalysis filter screen device |
-
2019
- 2019-11-07 CN CN201911084114.8A patent/CN110756046A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004024461A (en) * | 2002-06-25 | 2004-01-29 | Denso Corp | Air cleaner |
| CN2619632Y (en) * | 2003-05-15 | 2004-06-09 | 南海市华星光电实业有限公司 | Indoor air purifier |
| CN205014509U (en) * | 2014-09-30 | 2016-02-03 | 首尔伟傲世有限公司 | Photocatalyst ball filter and utilize its air purification system |
| CN108452362A (en) * | 2018-06-21 | 2018-08-28 | 广东美的环境电器制造有限公司 | Sterilize module and disinfection equipment |
| CN109569275A (en) * | 2018-11-20 | 2019-04-05 | 杭州爱净科技有限公司 | Photocatalysis filter screen device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4331721A1 (en) | 2022-08-31 | 2024-03-06 | Calistair SAS | Catalytic system with photocatalyst and gas depollution apparatus containing the same |
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Application publication date: 20200207 |