CN103463971A - Photocatalytic air purification device based on diffused optical fibers - Google Patents
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- 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
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The invention discloses a photocatalytic air purification device based on diffused optical fibers, which comprises a filter unit and a photocatalytic unit, wherein the filter unit is a cylindrical one of which the radial cross section is shaped like a ring; the upper end and the lower end of the filter unit are respectively connected with a top end cover and a bottom end cover; the center of the top end cover is provided with an air outlet; top end mounting holes are uniformly arranged in the circumference of the air outlet; bottom end mounting holes are uniformly arranged in the bottom end cover; the photocatalytic unit is a fibrous catalytic unit; and one end of the photocatalytic unit is fixedly connected with the top end mounting holes, and the other end is fixedly connected with the bottom end mounting holes. According to the technical scheme of the invention, 360-degree lateral air intake is adopted, so that the secondary pollution influence caused by byproducts of photocatalytic reaction can be effectively decreased; and titanium dioxide is simultaneously loaded on surfaces of HEPA (high efficiency particulate air) and activated carbon fibers, thereby increasing the ultraviolet utilization ratio and effectively improving the air purification efficiency. Thus, the photocatalytic air purification device is applicable to closed, flammable and explosive environments such as aircrafts, subways, trains, factories and the like.
Description
Technical field
The invention belongs to the air purifying process field, more particularly, relate to and utilize the photocatalysis air cleaning device of light-catalyzed reaction to airborne harmful substance high-efficient purification.
Background technology
Along with global modernization is carried out and the improving constantly of material spirit civilization, the environmental pollution brought by industrialization and ecological disruption are subject to everybody and extensively pay attention to.The expert has researched and developed multiple air cleaning unit both at home and abroad for this reason, in order to improve the living environment around improving.At present, the air cleaning system of using both at home and abroad adopts active carbon adsorption technology, ozone purification technology, anion dedusting technology, high voltage electrostatic technique and photocatalysis technology mostly.In recent years, the light catalytic purifying technology obtains the broad research development because of the advantage such as efficient low-consume, safety non-toxic, sterilization and deodorization.
Photocatalysis air-cleaning technology based semiconductor theory, the principle of its degradation of contaminant is: when its photon energy is more than or equal to the energy gap of semi-conducting material, can form light induced electron-hole pair, when it is moved to catalyst surface, effectively oxidation or reduction adsorption, at the pernicious gas molecule of catalyst surface, and are the materials such as nontoxic water and carbon dioxide by its thorough mineralising for those.Through patent retrieval, find, the patent of light catalytic purifying technology has: China Patent No. 1486778A, and name is called: photocatalysed purifier; China Patent No. 1605808A, name is called: photocatalysis air purifying device etc.Existing photo catalysis reactor mostly adopts ultraviolet lamp tube as direct light source, inevitable electricity, heat contact with the direct of working environment, mainly for room air, can't be applicable to the sealing such as aircraft, subway, train, factory, inflammable and explosive environment, and can't solve that the photocatalytic process catalytic efficiency is low, secondary pollution problems.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of photo-catalysis air purifying apparatus based on dispersion fiber is provided, and can effectively reduce the impact of the secondary pollution that the accessory substance of light-catalyzed reaction brings in conjunction with active carbon adsorption technology, at HEPA, activated carbon fiber surface while carried titanium dioxide, when improving the ultraviolet light utilization rate, effectively improve air purification efficiency, applicable to sealing, inflammable and explosive environment such as aircraft, subway, train, factories.
Technical purpose of the present invention is achieved by following technical proposals:
Photocatalysis air cleaning device based on dispersion fiber, comprise filter element and photocatalysis unit, wherein:
Described filter element is the tubular filter element, and its radial cross-section is ring-type, and has certain altitude, and its upper/lower terminal is connected with bottom cover with top end cover respectively;
The central authorities of described top end cover are provided with gas outlet, by pipeline, with pump, are connected; Surrounding in described gas outlet evenly is provided with the top installing hole; Described bottom cover evenly is provided with the bottom installing hole;
Described photocatalysis unit is selected fibrous catalyst unit, and the one end is fixedly linked with the top installing hole be arranged on top end cover, and the other end is fixedly linked with the bottom installing hole be arranged on bottom cover.
In technique scheme, described filter element is selected the HEPA filter element, can the airborne contaminant particle of effectively catching; Described HEPA filter element is cylindrical structure, and its surface is the cellular porous structure of fold-type; The material of described HEPA filter element is selected PP filter paper, glass fibre, the composite filter paper be comprised of PP and PET or NACF, and described cellular porous structure mesothyrid is chosen as triangle, square, polygon, circle or corrugated.
In technique scheme, described top installing hole is arranged on top end cover in the concentric circles mode, in top end cover institute in the plane, along 360 degree circular arcs, be uniformly distributed, take the top end cover center as the center of circle, in the radially equal intervals of top end cover, some circles top installing hole is set, for example 3-6 circles; Described bottom installing hole is arranged on bottom cover in the concentric circles mode, in bottom cover institute in the plane, along 360 degree circular arcs, is uniformly distributed, and take the bottom cover center as the center of circle, in the radially equal intervals of bottom cover, some circles bottom installing hole is set, for example 3-6 circles; The projection of described top installing hole and bottom installing hole in the vertical direction is consistent.
In technique scheme, described fibrous catalyst unit vertically is connected with top end cover, bottom cover, and parallel with the tubular filter element.
In technique scheme, described fibrous catalyst unit is evenly distributed in the space formed by filter element, top end cover and bottom cover.
In technique scheme, described fibrous catalyst unit is comprised of dispersion fiber and NACF, and described dispersion fiber is for being connected with top installing hole, bottom installing hole, and described NACF is wrapped in the skin of dispersion fiber.
In technique scheme, be provided with titanium dioxide photocatalyst layers on the surface of described NACF, or load there is titanium dioxide optical catalyst.
In technique scheme, be provided with titanium dioxide photocatalyst layers in the inner wall surface of described tubular filter element, or load there is titanium dioxide optical catalyst.
In technique scheme, described titanium dioxide optical catalyst is selected flaky nanocrystalline, nanotube, nano wire, Graphene and the composite titania material of titanium dioxide or the titanium dioxide of platinum doping remodeling, described titanium dioxide optical catalyst is carried out to load by following method on the NACF surface, and for example the dipping lifts, magnetron sputtering, colloidal sol-gel.After load, possesses larger titanium dichloride load area on Structure of Activated Carbon Fibers, can improve the efficiency that pollutants in air is removed in photocatalysis, simultaneously because active carbon itself has stronger suction-operated, the impact of the secondary pollution that can effectively avoid light-catalyzed reaction to produce on environment.
When the above-mentioned preparation of carrying out titanium dioxide optical catalyst and load, for example, with reference to preparation method and the carrying method thereof of relevant dissimilar titanium dioxide in prior art,
(1) flaky nanocrystalline:
Synthesis?and?Characterization?of?TiO
2Nano-crystalline?with?Differ?ent?Morphologies?by?Low-temper?atur?e?Hydrothermal?Method；ZHANG?Xia，ZHAO?Yan，ZHANG?Cai-Bei，MENGHao；ActaPhys.-Chim.Sin.，2007，23(6):856-860
(2) Graphene and composite titania material:
Preparation?and?photoactivity?of?graphene/TiO
2hybrid?photocatalysts?under?visible?light?irraditon;LIU?Hui，DONG?Xiao-nan，SUN?Chao-chao;Journal?of?Shaannxi?University?of?Science&Technolog:1000-5811(2013)01-0023-06
(3) titanium dioxide of platinum doping remodeling:
Photocatalytic?Activity?of?TiO
2Thin?Film?Doped?by?Ptwith?Different?Distribution;WANG，Jun-GangLI，Xin-Jun，ZHENG，Shao-JianHE，Ming-XingXU;ACTA?CHIMICA?SINICA?No.7,592～596
(4) nanotube:
Research?Advances?in?TiO
2Nanotubes;Kong?Xiangrong，Peng?Peng，Sun?Guixiang，Zheng?Wenjun;ACTA?CHIMICA?SINICANo.8，1439～1444
(5) nano wire:
Recent Process in Metal-doped Titanium Oxide Nanowires; DU Jun, SHI Jiaguang, HUANG Jingjing, ZHANG Wenlong, LIU Fei; Material Leader in February, 2012
(6) dipping lifts:
Dip-coating method prepares TiO
2the research of film and photocatalysis performance thereof; Nanchang is uncommon, Quan Wurong, Zhang Jingai, Zhao Chengnan; Solar energy journal Vol.21.No.4
(7) magnetron sputtering:
AFM?Analysis?on?Ti02?Low-E?Thin?Films?Deposited?by?Magnetron?Sputtering;ZHENG?Zi-yao，WANG?Zhu，LI?Chun-ling，ZHAO?Qing-nan;SEMICoNDUCTORoPTOELECTRoNICS?V01.26No.5
(8) colloidal sol-gel:
Sol-gel?preparation?and?photocatalytic?activities?of?TiO
2nanoparticles;QIAN?Dong，YAN?Zao-xue，SHI?Mao;The?Chinese?Journal?of?Nonferrous?Metals，NO.1004?0609(2005)05?081706
Compared with prior art, in technical scheme of the present invention, dispersion fiber-NACF photocatalysis unit is vertically evenly arranged in barrel type reactor inside, select dispersion fiber of the prior art simultaneously, luminous to realize Omnibearing even, its structure is silica core, disperse layer and transparent silicon rubber adhesive, can provide light source for whole smell photocatalysis purifier, adopt optical fiber light-guiding, can effectively avoid directly connecting by the uviol lamp source heat that power supply causes, the potential safety hazard that electricity brings, can avoid the direct introducing of power supply in device simultaneously, and then can be applicable to aircraft to a great extent, subway, train, the sealings such as factory, inflammable and explosive environment.Technical solution of the present invention, in high efficiency filter air particles pollutant, can be sterilized, and effectively prevented secondary pollution in degerming; By the absorption property of active carbon (ACF) (and various wavelength light are had to stronger absorbability) and TiO
2photocatalysis performance organically combine, can effectively solve the saturated inefficacy of current ACF, secondary pollution and TiO
2the problems such as catalytic rate is slow, mineralising efficiency is low, control a kind of practicable method be provided for the economical and effective of VOCs pollutant, the multifunctional air purifying system that provide and efficiently utilize luminous energy, continues the efficient stable running.
The accompanying drawing explanation
Fig. 1 is the top view of the photocatalysis air cleaning device structure based on dispersion fiber of the present invention, and wherein 1 is filter element, and 2 is the top installing hole, and 3 is gas outlet, and 4 is top end cover.
Fig. 2 is the upward view of the photocatalysis air cleaning device structure based on dispersion fiber of the present invention, and wherein 1 is filter element, and 5 is bottom cover, and 6 is the bottom installing hole.
Fig. 3 is the schematic diagram of photocatalysis unit structure of the present invention, and wherein 7 is dispersion fiber, and 8 is NACF.
Fig. 4 is the side view of the photocatalysis air cleaning device structure based on dispersion fiber of the present invention, and wherein 1 is filter element, and 4 is top end cover, and 5 is bottom cover.
Fig. 5 is the internal structure schematic diagram of the photocatalysis air cleaning device based on dispersion fiber of the present invention, and wherein 4 is top end cover, and 5 is bottom cover, and 7 is dispersion fiber.
The specific embodiment
Further illustrate technical scheme of the present invention below in conjunction with specific embodiment.
The structural representation of the photocatalysis air cleaning device based on dispersion fiber as shown in accompanying drawing 1-5, wherein 1 is filter element, 2 is the top installing hole, 3 is gas outlet, and 4 is top end cover, and 5 is bottom cover, 6 is the bottom installing hole, and 7 is dispersion fiber, and 8 is NACF.
Filter element is tubular filter element HEPA, and its radial cross-section is ring-type, and has certain altitude, and its upper/lower terminal is connected with bottom cover with top end cover respectively.
The central authorities of top end cover are provided with gas outlet, by pipeline, are used for being connected with pump, and after the pump as air entraining device is opened, air, along the 360 degree side surrounding air intakes of tubular filter element HEPA, enters in the volume of purifier.
Two ends up and down at purifier arrange respectively top end cover and bottom cover, with the tubular filter element, are fixedly linked; On top end cover, the surrounding of gas outlet evenly is provided with the top installing hole, bottom cover evenly is provided with the bottom installing hole, being about to top installing hole and bottom installing hole is arranged in the concentric circles mode, and make the projection of top installing hole and bottom installing hole in the vertical direction consistent, in top end cover and bottom cover institute in the plane, along 360 degree circular arcs, be uniformly distributed, take top end cover and bottom cover center is the center of circle, its radially equal intervals three circle top installing holes and bottom installing hole are set.
Be uniformly distributed and be provided with photocatalysis unit in the volume of the purifier formed at top end cover, bottom cover and tubular filter element, select fibrous catalyst unit, by dispersion fiber and NACF, formed, dispersion fiber is for being connected with top installing hole, bottom installing hole, be about to fibrous catalyst unit and vertically be connected with top end cover, bottom cover, and parallel with the tubular filter element; NACF is wrapped in the skin of dispersion fiber.
Be provided with the optically catalytic TiO 2 layer on the surface of NACF, or load there is titanium dioxide optical catalyst; Be provided with titanium dioxide photocatalyst layers on the inwall of filter element, or load there is titanium dioxide optical catalyst.
The HEPA used is purchased from Zhongshan Cleantop ACF Co., Ltd., and NACF is purchased from clean carbon fiber Co., Ltd of Jiangsu section, and dispersion fiber is purchased from Nanjing Chun Hui Science and Technology Ltd..
In tubular filter element HEPA, cylinder overall diameter 60cm, the thick 5cm of barrel, height 100cm, 60 of optical fiber arrangements, gas outlet is directly 20cm, according to preparation method in prior art, NACF being flooded in colloidal sol-gel complex material to the number of times lifted is 3 times, after under argon gas atmosphere with 2.5 ℃/min be warming up to 250 ℃ the insulation 1h, again with 5 ℃/min rise to 450 ℃ the insulation 2h, after obtain the dispersion optical fiber photocatalysis unit; Be chosen on the inwall of filter element HEPA and directly brush the sol-gel composite, after be warming up to 250 ℃ of insulation 1h with 2.5 ℃/min under argon gas atmosphere, then rise to 450 ℃ of insulation 2h with 5 ℃/min, after obtain filter element.
The sol-gel processing of Graphene and composite titania material: by natural flake graphite and sodium nitrate 1:1 in mass ratio, in the 100ml concentrated sulfuric acid, mix, keep solution temperature to be no more than 10 ℃, reaction 30min; Slowly add a certain amount of potassium permanganate (10 times to graphite), constantly stir, solution temperature rises to 20 ℃-40 ℃, reaction 30min; Gradation adds 150ml distilled water, controls solution and does not seethe with excitement, reaction 30min; Add 20ml, 30% H
2o
2, after stirring, centrifugation while hot, with after (1:10) HCl washing once, with the distilled water washing for several times, approaching neutral to filtrate pH, be lyophilized into powder and be graphite oxide.Be respectively 1.5%, 2%, 3%, 4% and 5% by C Theoretical Mass mark, graphite oxide fully disperseed in absolute ethyl alcohol to the ultrasonic 1h that peels off, the sodium borohydride that adds 3 times of quality, vibration 16-17h, with absolute ethanol washing for several times, add the 10ml butyl titanate, take glacial acetic acid as end-capping reagent, constantly stir a couple of days, obtain the gel state product, fully dry, be warming up to 250 ℃ of insulation 1h with 2.5 ℃/min under argon gas atmosphere, then rise to 450 ℃ of insulation 2h with 5 ℃/min.Get final product to obtain TiO
2-Gn(titanium dioxide-Graphene) composite photo-catalyst.
Air inlet at the uniform velocity passes into O
3the gaseous mixture that content is 0.150ppm-0.200ppm (mist of ozone and air), exit velocity is controlled as 2m/s, and in reactor, disperse light reacts 30min, 60min, 90min, 120min and 300min, O after detection reaction under irradiating
3concentration, calculate O
3degradation rate.From test result, when ultraviolet lighting 30min, O
3degradation rate is 25.26%; And the reaction of propagation time reaches 60min, O
3degradation rate increases fast to 66.12%; And continue to extend catalysis time, the O after degraded
3larger decline no longer appears in concentration basically, substantially can keep stable.
Above the present invention has been done to exemplary description; should be noted that; in the situation that do not break away from core of the present invention, the replacement that is equal to that any simple distortion, modification or other those skilled in the art can not spend creative work all falls into protection scope of the present invention.
Claims (10)
1. the photocatalysis air cleaning device based on dispersion fiber, is characterized in that, comprises filter element and photocatalysis unit, wherein:
Described filter element is the tubular filter element, and its radial cross-section is ring-type, and its upper/lower terminal is connected with bottom cover with top end cover respectively;
The central authorities of described top end cover are provided with gas outlet, by pipeline, with pump, are connected; Surrounding in described gas outlet evenly is provided with the top installing hole; Described bottom cover evenly is provided with the bottom installing hole;
Described photocatalysis unit is selected fibrous catalyst unit, and the one end is fixedly linked with the top installing hole be arranged on top end cover, and the other end is fixedly linked with the bottom installing hole be arranged on bottom cover;
Described fibrous catalyst unit is comprised of dispersion fiber and NACF, and described dispersion fiber is for being connected with top installing hole, bottom installing hole, and described NACF is wrapped in the skin of dispersion fiber;
The surface of described NACF is provided with titanium dioxide photocatalyst layers, or load has titanium dioxide optical catalyst.
2. the photocatalysis air cleaning device based on dispersion fiber according to claim 1, is characterized in that,
Described filter element is selected the HEPA filter element, can the airborne contaminant particle of effectively catching, and its surface is the cellular porous structure of fold-type;
Described top installing hole is arranged on top end cover in the concentric circles mode, in top end cover institute in the plane, along 360 degree circular arcs, is uniformly distributed, and take the top end cover center as the center of circle, in the radially equal intervals of top end cover, some circles top installing hole is set; Described bottom installing hole is arranged on bottom cover in the concentric circles mode, in bottom cover institute in the plane, along 360 degree circular arcs, is uniformly distributed, and take the bottom cover center as the center of circle, in the radially equal intervals of bottom cover, some circles bottom installing hole is set; The projection of described top installing hole and bottom installing hole in the vertical direction is consistent;
Described fibrous catalyst unit vertically is connected with top end cover, bottom cover, and parallel with the tubular filter element, is evenly distributed in the space formed by filter element, top end cover and bottom cover.
3. the photocatalysis air cleaning device based on dispersion fiber according to claim 2, is characterized in that, in top end cover institute in the plane, take the top end cover center as the center of circle, in the radially equal intervals of top end cover, 3-6 circle top installing holes is set.
4. the photocatalysis air cleaning device based on dispersion fiber according to claim 2, is characterized in that, in bottom cover institute in the plane, take the bottom cover center as the center of circle, in the radially equal intervals of bottom cover, 3-6 circle bottom installing holes is set.
5. the photocatalysis air cleaning device based on dispersion fiber according to claim 1 and 2, is characterized in that, the material of described HEPA filter element is selected PP filter paper, glass fibre, the composite filter paper be comprised of PP and PET or NACF.
6. the photocatalysis air cleaning device based on dispersion fiber according to claim 1 and 2, is characterized in that, in described HEPA filter element, described cellular porous structure mesothyrid is chosen as triangle, square, polygon, circle or corrugated.
7. the photocatalysis air cleaning device based on dispersion fiber according to claim 1 and 2, is characterized in that, be provided with titanium dioxide photocatalyst layers in the inner wall surface of described tubular filter element, or load has titanium dioxide optical catalyst.
8. the photocatalysis air cleaning device based on dispersion fiber according to claim 1, it is characterized in that, described titanium dioxide optical catalyst is selected flaky nanocrystalline, nanotube, nano wire, Graphene and the composite titania material of titanium dioxide or the titanium dioxide of platinum doping remodeling, described titanium dioxide optical catalyst is carried out to load by following method, and for example the dipping lifts, magnetron sputtering, colloidal sol-gel.
9. the photocatalysis air cleaning device based on dispersion fiber according to claim 7, it is characterized in that, described titanium dioxide optical catalyst is selected flaky nanocrystalline, nanotube, nano wire, Graphene and the composite titania material of titanium dioxide or the titanium dioxide of platinum doping remodeling, described titanium dioxide optical catalyst is carried out to load by following method, and for example the dipping lifts, magnetron sputtering, colloidal sol-gel.
10. the application of the photocatalysis air cleaning device based on dispersion fiber as described as one of claim 1-9 in sealing, inflammable and explosive environment.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103992073A (en) * | 2014-06-10 | 2014-08-20 | 长白朝鲜族自治县天福硅藻土有限公司 | Diatom mud and preparation method thereof |
| CN111229028A (en) * | 2020-02-28 | 2020-06-05 | 佛山市金净创环保技术有限公司 | Photocatalytic fiber air purifier and use method thereof |
| CN112062208A (en) * | 2020-08-28 | 2020-12-11 | 南昌大学 | Photocatalysis treatment device suitable for high turbidity, high chroma waste water |
| CN114183874A (en) * | 2021-11-16 | 2022-03-15 | 广东美的制冷设备有限公司 | Purification device and air conditioner |
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| CN1702202A (en) * | 2005-06-22 | 2005-11-30 | 中山大学 | Active carbon fiber containing nano titanium dioxide particles and its preparation method and uses |
| CN101121114A (en) * | 2007-07-24 | 2008-02-13 | 西北大学 | Continuous mobile type purifying air and water nano-crystalline photocatalysis reactor |
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| CN112062208A (en) * | 2020-08-28 | 2020-12-11 | 南昌大学 | Photocatalysis treatment device suitable for high turbidity, high chroma waste water |
| CN112062208B (en) * | 2020-08-28 | 2021-12-31 | 南昌大学 | Photocatalysis treatment device suitable for high turbidity, high chroma waste water |
| CN114183874A (en) * | 2021-11-16 | 2022-03-15 | 广东美的制冷设备有限公司 | Purification device and air conditioner |
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