CN103585881A - Indoor air purifying device - Google Patents
Indoor air purifying device Download PDFInfo
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- CN103585881A CN103585881A CN201310531283.8A CN201310531283A CN103585881A CN 103585881 A CN103585881 A CN 103585881A CN 201310531283 A CN201310531283 A CN 201310531283A CN 103585881 A CN103585881 A CN 103585881A
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- distribution plate
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- indoor air
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Abstract
An indoor air purifying device belongs to the electric appliance field, and comprises a casing, a purifying system and a ventilator; the purifying system consists of a wind-distribution plate, a multilayer filter screen, a photocatalytic reactor and a tail absorber which are connected successively. The photocatalytic reactor comprises a catalyst thin film, a fluorescent lamp tube and a negative ion generator. The ventilator is arranged on the the front end of the casing of the air purifying device, the wind-distribution plate is arranged in the casing, near the wind-distribution plate, the multilayer filter screen is arranged behind the wind-distribution plate, the photocatalytic reactor is arranged behind the multilayer filter screen, the photocatalytic reactor is a structure shaped as a cylinder, a layer of the catalyst thin film is attached on a cylinder wall, a fluorescent lamp as a light source is arranged evenly in the cylinder, the fluorescent lamp tube is connected with the negative ion generator, and the other end of the negative ion generator is connected with the tail absorber. The indoor air purifying device does not use ultraviolet light, exclusively and firstly realizes a new concept of ''visible light'' reaction, and is novel and unique, free of secondary pollution, and free of generation of the ultraviolet light.
Description
Technical field
The present invention relates to
oneplant indoor air-purification device, be specifically related to a kind of air cleaning unit that utilizes radiation of visible light nano titanic oxide catalyst degraded pernicious gas.
Background technology
Research shows, photocatalysis is the harmful very effective approach of dusty gas of degraded room air.Because photocatalysis technology is under the condition of normal temperature and pressure, the pernicious gas of airborne low concentration and peculiar smell thoroughly can be decomposed into
Odorless, harmless product, non-secondary pollution, energy consumption are low, simple to operate, and this technology has broad application prospects in pollution control.For light-catalysed nano-TiO
2also there is the function of killing microorganisms bacterium simultaneously.
At present in clarifier, adopting the basic skills of photocatalysis technology is by TiO
2it is online that particle adheres to traditional air filtration.Although TiO
2the pernicious gases such as nano material PARA FORMALDEHYDE PRILLS(91,95) have certain degradation, but during application, ubiquitous problem is that speed is slow, efficiency is low, can not solve suspension and the very large fine particulates problem of harm in room air, catalyst micropore is easily caused catalysqt deactivation by obstructions such as dust and particles simultaneously, and due to powder TiO
2catalyst is difficult to separated recovery.Therefore, by catalyst immobilization, and to improve its catalytic effect be one of photocatalytic process problem demanding prompt solution.Develop and can efficiently kill except germ bacterium, again can fast deep the material for air purification of degraded VOCs will have broad prospect of application.
Determine clarifier task performance be also embody its technical merit be mainly filter material this part.Analyze existing filter material, comprise that every kind of filter materials such as middle effect, high-efficient purification material, active carbon, molecular sieve have characteristic and limitation separately, cause the practical function of clarifier also unsatisfactory.These air purifiers, although can change some characteristic of room air, its sphere of action and degree are all very little.Some is even far from being and eliminates airborne toxic dust, does not reach the object purifying air.For this reason, need to research and develop energetically some NEW TYPE OF COMPOSITE filter materials, improve indoor air purification effect.Bibliographical information with TiO
2although for the research of photochemical catalyst a lot, for adopting with TiO in air purifier
2the research of/ACF complex PHOTOCATALYTIC AIR-PURIFYING but rarely has report.Purification limitation for current scavenging material, utilize up-to-date photocatalysis+adsorption and purification technology, design and a kind ofly can eliminate peculiar smell, go out filter bacterium, absorb dust, decompose multi-functional air cleaning units such as absorbing pernicious gas, thereby raising practical function, just can reach the object of improving indoor air quality.
Summary of the invention
For the problems referred to above, the invention provides the air cleaning unit of formaldehyde (benzene etc.) catalytic degradation under a kind of visible ray condition, its core technology is to utilize radiation of visible light nano titanic oxide catalyst, thus catalytic degradation formaldehyde, the pernicious gases such as benzene.
A kind of indoor air-purification device of the present invention, is comprised of housing, cleaning system, ventilation blower, and wherein cleaning system is connected in sequence by air distribution plate, multiple filtration net, photo catalysis reactor and afterbody absorber.Photo catalysis reactor is comprised of catalyst film, fluorescent tube, anion generator.Ventilation blower is positioned at air evolution device case front end, air distribution plate is positioned at housing near air distribution plate place, after air distribution plate, be provided with multiple filtration net, after multiple filtration net, be provided with photo catalysis reactor, photo catalysis reactor version adopts cylindric, adheres to one deck catalyst film on tube wall, is evenly arranged a fluorescent lamp as light source in pipe, fluorescent tube is in being connected with anion generator, and the anion generator other end is connected with afterbody absorber.
Described catalyst film is SiO2-TiO2-ACF system catalytic membrane.
Use SiO2-TiO2-ACF system catalytic membrane, TiO
2the mass fraction of Anatase increases; Crystallite dimension is reduced to 6. 95 nm from 11. 29 nm; Generate T i-O-Si key, SiO
2and activated carbon fiber, the porous surface structure of ACF has strengthened photocatalysis effect widely, the intermediate by-products of reaction is adsorbed and transfer to TiO
2pollutant is purified completely, non-secondary pollution.
The larger dust foreign material of grid filtering that pernicious gas first arranges by air inlet place, by blower fan, send into multiple filtration net, filter out less particle, bacterium etc., then enter photo catalysis reactor, various polluters are comprised to harmful gas with foreign flavor adsorption cleaning of degrading.Gas, finally by afterbody absorber, absorbs the pollutants such as a small amount of pernicious gas not being degraded and dust.
Triplicity can be raised the efficiency more greatly.Anion generator can produce certain density anion (anion generally refers to airborne negative oxygen ion), can promote human body metabolism, improve human immunological competence, strengthen human body flesh energy, regulate human body function balance, further promote that people's is healthy.
Photo catalysis reactor version in purifier adopts cylindric, on tube wall, adhere to one deck SiO2-TiO2-ACF photocatalytic compound, in pipe, be evenly arranged a fluorescent lamp as light source, and make light source and catalyst layer as far as possible close, the photon sending to make full use of light source.This arrangement form can shine directly into light on the catalyst layer loading on tube wall, reacting gas catalyst flows outside and and catalyst action, reduced reactor and reaction gas flow to the absorption of light and scattering.Due to adding of activated carbon fiber ACF, increased the amount of the organic reactant that is delivered to titanium dioxide surface, thereby effectively improved the speed of the harmful dusty gas of photocatalytic degradation.
For light-catalysed reaction mechanism, there is a lot of research, set up under the irradiation of light the radical reaction mechanism pattern occurring on semiconductor particle at present.Semiconductor particle has band structure, generally by filling up the low energy valence band (valence band, VB) of electronics and empty high energy conduction band (conduction band, CB), forms, and between valence band and conduction band, has forbidden band.When be equal to or greater than energy gap with energy, (also claim band gap, during irradiation semiconductor Eg), electronics in valence band (e-) is excited and transits to conduction band, produces corresponding hole (h+) in valence band, separated and move to particle surface under electric field action.Semiconductor absorption threshold value λ g and energy gap have following relational expression:
λg(nm)=1240／Eg(eV)
From above formula, the maximum wavelength that TiO2 photocatalysis is irradiated is 387.5 nin.The energy of TiO2 photo-induced hole is 7.5 eV, has strong oxidizing property, and light induced electron has strong reducing property.Electronics and hole migration, to semiconductor particle surface, participate in and accelerated oxidation reduction reaction.Due to electronics and hole exist compound may, if do not suppress the compound of electronics and hole, its recombination process can complete within the time less than 10 seconds so, its energy is with regard to approach exhaustion, photochemical reaction also just cannot be carried out smoothly.Therefore, must there be suitable electronics, hole capture agent, suppress the compound of electronics and hole.
Hole capture agent is the OH-group of TiO2 adsorption normally, and it will produce OH after hole capture, and research shows, OH is oxidant main in light-catalyzed reaction, and it is no matter at Adsorption Phase or can cause oxidation reaction at solution phase.The agent of capturing of electronics is mainly absorption and the oxygen on TiO2 surface, and it can suppress the compound of electronics and hole, forms 0, O2-become after the protonation another source of OH simultaneously.When the main adsorbate in TiO2 surface is OH-and H20, their trapped holes produce strong oxidizer OH, by OH, are oxidized adjacent organic matter, also can be diffused into oxidation of organic compounds in liquid phase.When the main adsorbate in TiO2 surface is organic matter, hole also can direct oxidation organic matter.For organic matter, can oxidation Decomposition be finally CO and H20.
Photohole has the very strong electronic capability that obtains, and has strong oxidizing property, can capture the electronics in semiconductor grain surface adsorbed material or solvent, makes not light absorbing material originally be activated oxidation, and electron acceptor is reduced by accepting surperficial electronics.Take anatase type tio2 semi-conducting material as example, and photocatalytic mechanism reaction is as follows:
At titanium dioxide surface light induced electron, e-is easily caught by electron acceptors such as oxygen in water, make the reaction of electron acceptor generation photo catalytic reduction, hole oxidable organic matter or the initial oxidation hydrone that is adsorbed in titanium dioxide surface forms OH, by electron donors such as OH deoxidation organic matters, make these electron donor generation photocatalysis oxidation reactions again.In a word, light induced electron-hole, no matter be directly or indirectly to react with reactant, all will, through the stage of generation high mars free radical, complete photocatalytic process.
Present scientific research shows: second generation nano titanium oxide can have been realized the high efficiency degraded of the pernicious gas such as PARA FORMALDEHYDE PRILLS(91,95) under visible ray, this foundation is based on by our company, the SiO2-TiO2-ACF system catalytic membrane of exploitation has improved the degradation efficiency to indoor formaldehyde pernicious gas, aspect the feasibility of product, accomplish to be based on science, take the foundation of scientific basis as product and company.
To eliminating indoor polluted gas, building a healthy daily life working environment has important realistic meaning.And its cost is lower, make it to substitute conventional air cleaners becomes possibility in financial cost.The environmental protection concept of these works is extremely strong, does not adopt ultraviolet light, exclusively realizes first " visible ray " and reacts this new ideas, and novel unique, non-secondary pollution, does not produce ultraviolet light.
Accompanying drawing explanation
Fig. 1 is indoor air-purification device schematic diagram of the present invention, 1 air distribution plate wherein, 2 multiple filtration nets, 3 catalyst films, 4 fluorescent tubes, 5 anion generators, 6 ventilation blowers, 7 afterbody absorbers, 8 housings.
The specific embodiment
, by housing 8, cleaning system, ventilation blower 6, formed, wherein cleaning system is connected in sequence by air distribution plate 1, multiple filtration net 2, photo catalysis reactor and afterbody absorber 7.Photo catalysis reactor is comprised of catalyst film 3, fluorescent tube 4, anion generator 5.Ventilation blower 6 is positioned at air evolution device case 8 front ends, air distribution plate 1 is positioned at housing 8 near air distribution plate 2 places, after air distribution plate 1, be provided with multiple filtration net 2, after multiple filtration net 2, be provided with photo catalysis reactor, photo catalysis reactor version adopts cylindric, adheres to one deck catalyst film 3 on tube wall, is evenly arranged a fluorescent lamp as light source in pipe, fluorescent tube 4 is in being connected with anion generator 5, and anion generator 5 other ends are connected with afterbody absorber 7.
Described catalyst film is SiO
2-TiO
2-ACF catalytic membrane.
The larger dust foreign material of grid filtering that pernicious gas first arranges by air inlet place, by blower fan, send into multiple filtration net, filter out less particle, bacterium etc., then enter photo catalysis reactor, various polluters are comprised to harmful gas with foreign flavor adsorption cleaning of degrading.Gas, finally by afterbody absorber, absorbs the pollutants such as a small amount of pernicious gas not being degraded and dust.
Claims (2)
1. an indoor air-purification device, is comprised of housing, cleaning system, ventilation blower, it is characterized in that cleaning system is connected in sequence by air distribution plate, multiple filtration net, photo catalysis reactor and afterbody absorber; Photo catalysis reactor is comprised of catalyst film, fluorescent tube, anion generator; Ventilation blower is positioned at air evolution device case front end, air distribution plate is positioned at housing near air distribution plate place, after air distribution plate, be provided with multiple filtration net, after multiple filtration net, be provided with photo catalysis reactor, photo catalysis reactor version adopts cylindric, adheres to one deck catalyst film on tube wall, is evenly arranged a fluorescent lamp as light source in pipe, fluorescent tube is in being connected with anion generator, and the anion generator other end is connected with afterbody absorber.
2. a kind of indoor air-purification device according to claim 1, is characterized in that described catalyst film is SiO
2-TiO
2-ACF catalytic membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310531283.8A CN103585881A (en) | 2013-11-01 | 2013-11-01 | Indoor air purifying device |
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|---|---|---|---|
| CN201310531283.8A CN103585881A (en) | 2013-11-01 | 2013-11-01 | Indoor air purifying device |
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| CN103585881A true CN103585881A (en) | 2014-02-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353303A (en) * | 2014-10-27 | 2015-02-18 | 张广舜 | Lateral-suction and closed gas filtering method and device with external motor |
| CN110559855A (en) * | 2019-10-22 | 2019-12-13 | 河南应用技术职业学院 | Indoor formaldehyde purification device capable of being circularly treated |
| CN112933786A (en) * | 2021-02-03 | 2021-06-11 | 陈小琴 | Recovery plant of old and useless polypropylene |
| CN113144892A (en) * | 2021-05-26 | 2021-07-23 | 广州大学 | Air processor |
| CN113828151A (en) * | 2021-10-09 | 2021-12-24 | 上海电力大学 | Gas-solid two-phase photocatalytic reduction carbon dioxide reactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353303A (en) * | 2014-10-27 | 2015-02-18 | 张广舜 | Lateral-suction and closed gas filtering method and device with external motor |
| CN110559855A (en) * | 2019-10-22 | 2019-12-13 | 河南应用技术职业学院 | Indoor formaldehyde purification device capable of being circularly treated |
| CN112933786A (en) * | 2021-02-03 | 2021-06-11 | 陈小琴 | Recovery plant of old and useless polypropylene |
| CN113144892A (en) * | 2021-05-26 | 2021-07-23 | 广州大学 | Air processor |
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| CN113828151B (en) * | 2021-10-09 | 2023-12-01 | 上海电力大学 | Gas-solid two-phase photocatalytic reduction carbon dioxide reactor |
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Application publication date: 20140219 |