CN1614321A - Plasma coupling light catalytic unit assembly and gas purifier therewith - Google Patents
Plasma coupling light catalytic unit assembly and gas purifier therewith Download PDFInfo
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- CN1614321A CN1614321A CN 200310106232 CN200310106232A CN1614321A CN 1614321 A CN1614321 A CN 1614321A CN 200310106232 CN200310106232 CN 200310106232 CN 200310106232 A CN200310106232 A CN 200310106232A CN 1614321 A CN1614321 A CN 1614321A
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Abstract
A plasma coupled photocatalyzing module used for gas purifier is composed of the plate electrodes with rigid dielectric barrier layer on its inner surface, the porous photocatalytizing body arranged between two dielectric barrier layers, and the sealing apron arranged to the peripheries of two dielectric barrier layers to form two spaces (one having gas inlet and another having gas outlet). Said gas purifier is composed of at least one said module.
Description
Technical field
The present invention relates to bacterium contained in the gas, virus, foul smell and harmful substance etc. are carried out the gas cleaning plant of photocatalysis and plasma decomposes, oxidation, reduction, degraded.
Background technology
In recent years, because dwelling house develops to high-rise closure, the pollution of outdoor air simultaneously is also serious day by day, and the air quality problems that therefore how to improve the living space more and more is subject to people's attention.For example, how to reduce bacterium contained in the air, virus, tobacco waste gas, building materials decoration, furniture chronic discharge by the harmful components of representatives such as VOC such as formaldehyde, benzene, banana oil and the metabolism foul smell in the environment etc.
In the prior art, adopt adsorbent such as activated carbon to carry out deodorization usually or make the foul smell composition and other medicine component reacts and becomes innocuous substance and reach the purpose that reduces foul smell.But in actual use, because the adsorbance of adsorbent has the limit, so when using over a long time, need regularly change the deodorization filter.In addition, even in the life period of deodorization filter, its end of lifetime also exists the composition that is adsorbed to emit once more and produces the problem of foul smell.Another kind method is to make foul smell become innocuous substance, destroy foul odors thereby foul smell composition and other medicine component are reacted.The problem that this method exists is: need to change pharmacy response, the discharge capacity of not only trouble, and control medicine component has difficulties constantly.In addition, in the time of decomposing harmful components such as removing formaldehyde, must carry out the high catalyst reaction of oxidation-reduction potential, the problem of its existence is, the oxidation Decomposition of carrying out with ozone can not reach decomposition fully, but the stage of decomposition product in the middle of stopping at can not realize innoxious completely.
Also have, also can be by coming complete purifying harmful gas composition with photochemical catalysts such as ultraviolet ray irradiation titanium oxide.But the fluorescent tube as the mercury vapor lamp of ultraviolet light source contains mercury, and the fluorescent tube goods can make the environmental protection load increase when discarded; And its purification speed is lower.
Disclose a kind of sparking electrode and catalyst reaction apparatus with air purification effect in the Chinese patent application 02118409.7, this device has by high-voltage discharge and produces ozone and ultraviolet device, utilizes the photochemical catalyst assembly that the photochemical catalyst effect purifies pernicious gas etc. and decompose by the ozoniferous ozonolysis equipment of electric discharge device.Though this device has degradation preferably to organic matter, can be used for deodorization, purifying harmful gas etc., but, because the gas that contains hazardous substance in this device must directly pass two electrodes, therefore electrode must be made loose structure, its intensity difference so not only, and easily being corroded, often maintain and replace; Make that simultaneously the processing technology of electrode is complicated, increased manufacturing cost.
Summary of the invention
The object of the present invention is to provide a kind of simple, the lower-cost plasma coupling photo catalytic unit block of gas purification and gas purifier of formation thereof of being used for of making.
Plasma coupling photo catalytic unit block of the present invention, comprise electrode, electrode supply and photocatalysis body, it is characterized in that: described electrode is a tabular, two parallel placements of planar electrode, be respectively equipped with the dielectric barrier of rigidity in the inboard of this two electrode plate, described photocatalysis body has been the appendix tabular porous body of photochemical catalyst, this tabular porous body is placed on the centre of two dielectric barriers, all there is the space both sides, periphery at two dielectric barrier flat boards is provided with sealing baffle, make between tabular porous body and two dielectric barriers and form two spaces, offer as air admission hole on the sidewall in a space therein, and on the opposite side wall in another space, set out pore, two are respectively equipped with into, constitute gas channel by the connection of the hole on the tabular porous body between the space of venthole; Perhaps with appendix the tabular porous body of photochemical catalyst replace one of them electrode, this porous body and the parallel placement of another planar electrode, be provided with the dielectric barrier of rigidity in the inboard of planar electrode, between this dielectric barrier and the tabular porous body space is arranged, periphery at dielectric barrier and tabular porous body is provided with sealing baffle, and on sidewall, offer hole as air inlet, make between porous body and the dielectric barrier to form the space that is provided with air inlet, and and porous body on the hole be communicated with and constitute gas channel.
Gas purifier of the present invention comprises housing and gas purification assembly, it is characterized in that, described gas purification assembly is above-mentioned plasma coupling photo catalytic unit block, has one group in every gas purifier at least; The many groups of use unit blocks, the in parallel and/or series connection of its gas channel.
Among the present invention, described electrode is whole writing board shape, can be entity, also can be porose.Adopt common connected mode between writing board shape electrode and the dielectric barrier, as stickup, clamping, coating etc.Because dielectric barrier is a rigidity, this makes the rigidity of electrode and discharge uniformity all obtain effective assurance.Therefore as long as adopt common conductive material to be made into the laminar electrode that promptly can be used as, this makes the handling ease of electrode realize.Owing to have dielectric barrier to be separated by between electrode material and the pernicious gas, can avoid electrode material to be discharged and the corrosive gas erosion simultaneously, this will prolong the service life of electrode greatly.
Described dielectric barrier adopts the bigger material of dielectric coefficient to make, and is generally ceramic material, also can adopting quartz glass, insulating materials such as polytetrafluoroethylene (PTFE) makes.This dielectric barrier also can be made into the laminar processing that makes it easy to, its size, shape should adapt with size, the shape of electrode, its thickness (being generally the 0.5-5 millimeter) should adapt with the voltage of electrode, makes it electrode is played power block effect completely, in order to avoid cause local electrical breakdown.
Described appendix the tabular porous body of photochemical catalyst, can make for materials such as metal, pottery, glass, be woven into latticed thin slice or perforating on sheet material with web, silk material etc., also can be machined directly to cellular, the eyelet on it is in order to allow the air communication mistake.Photocatalysis body can superpose for single or multiple lift, and its gross thickness is chosen in the 5-20 millimeter scope usually, and its aperture can be chosen in the 0.5-5 millimeter.The photochemical catalyst of institute's appendix can be the titanium oxide TiO with photocatalysis
2(Detitanium-ore-type) also has SrTiO in addition
3, ZnO, BaTiO
3, V
2O
5, SnO
2Deng metal-oxide semiconductor (MOS), or Si, GaAs, element semiconductor or compound semiconductors such as CdS, ZnS.Can adopt modes such as common coating, spraying, plated film, all surface (comprising outer surface and eyelet inner surface) at porous body forms photocatalyst film, so both make technical process simple, and also made the specific area of photochemical catalyst increase, helped improving the photocatalysis effect.
Gap between described photocatalysis body and the dielectric barrier selects spacing usually between the 0.5-5 millimeter.This gap and air admission hole, venthole form the inlet air flow passage and go out gas channel; This gap also is the gap of plasma discharge simultaneously.The ultraviolet light that plasma discharge produces, shine photocatalyst surface, produce photocatalysis, by photocatalysis degradation organic contaminant, ozone, ion and the free radical etc. of discharge generation also participate in all photocatalyst surface organic pollutant degradation processes simultaneously.When the used appendix tabular porous body of photochemical catalyst when replacing one of them electrode, i.e. the effect that the semiconductor light-catalyst film of institute's appendix or porous body itself have conduction on the porous body makes between photocatalysis body and the planar electrode to constitute pair of discharge electrodes.Photocatalysis body not only had photocatalysis, but also had the effect of electrode concurrently this moment, had save another electrode like this, cost-saved, reduction volume.For the contaminated serious situation of gas, also can make the both sides up and down of photocatalysis body all be provided with the plate electrode of dielectric barrier, form bipolar electrode structure (promptly polyphone uses), this moment each electrode all with the photocatalysis body formation pair of discharge electrodes of centre, make the effect that produces plasma discharge in air intake duct and the gas off-take simultaneously, thereby further improve the gas purification treatment effect.
In air purifier of the present invention, the gas circuit parallel connection by many groups unit block can improve the disposal ability of gas purification; By the polyphone of many groups unit block, can improve the gas purification treatment effect.Also can improve the disposal ability and the treatment effect of gas purification simultaneously by polyphone and in parallel using with.During polyphone, each unit block can be settled in proper order, also can settle relatively in twos, and this moment is surrounding baffle outside the province, makes the gas off-take of two unit blocks shared, can further save cost.
In air purifier of the present invention, also can by in gas off-take or its exit add ozone decomposition catalyst, not carrying out resolution process, in order to avoid in atmosphere, discharge harmful ozone with the ozone of harmful substance reaction; Perhaps by in air intake duct or its import department add filter with a harmful substance filtering part in advance, to reduce harmful substance contents, and avoid big solid particle directly to enter photocatalysis body and stop up eyelet, make the eyelet on the photocatalysis body keep unimpeded, give full play to its photocatalysis effect; By advancing/gas off-take in or place, its import/export use blower fan, guarantee that the gas in the device has certain flow velocity, thereby obtain needed disposal ability.
High voltage source used in the air purifier of the present invention can be selected according to the difference that environment is set, for example output duty cycle is the DC pulse of 0.5-0.01 or exchanges the short pulse power supply or frequency is the AC power of 50Hz-100kHz, the Dc bias of the 50-90% that is equivalent to peak value as on AC power, superposeing, the power supply intermittently used function of can increasing exchanges.
In sum, plasma coupling photo catalytic unit block of the present invention, the ultraviolet light that utilizes plasma discharge to produce shines photocatalyst surface, produces photocatalysis, makes photocatalysis degradation organic contaminant; The ozone of discharge generation, ion and free radical etc. also participate in the degradation process of all photocatalyst surface organic pollutions, and this has accelerated the pollutant decomposable process greatly, makes the better effects if of Purge gas pollutant.Simultaneously, owing to do not need electrode is made specific porous electrode, make electrode easy to process; The photochemical catalyst of institute's appendix is membranaceous on the photocatalysis body, and manufacture craft is simple.Owing to above reason, make total cost of manufacture obviously reduce.Plasma coupling photo catalytic unit block of the present invention can be selected the combination that different gas circuits is in parallel and/or connect according to the different requirements of different use occasions, is assembled into gas purifier, makes its clean-up effect obtain maximum performance.
Description of drawings
Fig. 1 is the basic structure schematic diagram of unit block of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the structural representation of a kind of embodiment of unit block of the present invention.
Fig. 4 is the structural representation of the another kind of embodiment of unit block of the present invention
Fig. 5 is the example structure schematic diagram by gas purifier of the present invention.
Fig. 6 is by the alternative embodiment of gas purifier of the present invention (the gas circuit parallel/series of unit block mixes use) structural representation.
The specific embodiment
Referring to Fig. 1, Fig. 2, the dielectric barrier 2 of two parallel placements is an earthenware slab, its thickness is 1 millimeter, the copper film that plates a layer thickness in the outside (back side of discharging gap) of this ceramic wafer 2 and be the 0.02-0.1 millimeter is as electrode 1, tabular photocatalysis porous body 3 is net sheets of the copper wire establishment of diameter 0.5 millimeter, and mesh is about 2 millimeters, and 12 are formed by stacking, gross thickness is about 6 millimeters, is titanium oxide TiO with the photocatalyst film of plated film mode appendix on the net sheet
2(Detitanium-ore-type) has 5 millimeters gaps respectively between dielectric barrier 2 and photocatalysis porous body 3.The seal 6 that engineering plastics are made connects two tabular photocatalysis porous bodies in aggregates, and constitutes space in the sealing.Hole on air inlet 4 on its sidewall, gas outlet 5 and the porous photocatalytic body 3 has constituted unobstructed gas channel, and the air current flow direction as shown by arrows.Among the figure also signal expressed the be connected situation of two electrodes with power supply N.It is that 50kHz, voltage are that 8kV, pulse duty factor are 0.2 alternating current discharge device that this power supply can adopt discharge frequency.
Fig. 3 is the structural representation of the another kind of embodiment of unit block of the present invention.Among this embodiment with appendix the tabular porous body 7 of photochemical catalyst replace an electrode plate, this tabular porous body and the dielectric barrier 8 parallel placements of depending on electrode, seal 9 is linked to be an integral body with dielectric barrier 8 and tabular porous body 7, among the figure also signal expressed being connected of two electrodes and power supply N.Its arrow is expressed the air current flow direction.
Fig. 4 is the improvement of Fig. 3 embodiment, and the negative 9 of equal size promptly is set below the tabular porous body, and has seal that itself and dielectric barrier, porous body are linked to be an integral body.Space between base plate 10 and the porous body is as the gas off-take of air-flow, and 11 are arranged on the ozone decomposition catalyst-absorbent charcoal material on this gas off-take.Arrow among the figure is represented the air current flow direction.
In the gas purifier embodiment of Fig. 5,4 groups of plasma coupling photo catalytic unit blocks have been used altogether, the citation form of unit block such as above-mentioned shown in Figure 3.The 12nd, last two groups of shared gas off-takes, the 16th, two groups of shared gas off-takes down.Electrode 13 also is a common elements, is equipped with dielectric barrier in the both sides up and down of this electrode 13, is respectively applied for up and down in two annular seal spaces.Look up from air current flow side, the gas channel of upper and lower two groups of two interior unit blocks is in parallel, and upper and lower two groups gas channel also is in parallel.In order to improve clean-up effect, also be provided with fan 14 in this clarifier, on the air-flow road of air inlet, also be provided with filter screen 15, constitute by nylon or wire netting, in order to the harmful substance in the coarse filtration gas, to reduce harmful substance contents and to avoid big solid particle to enter the photocatalysis porous body, make eyelet keep unimpeded.On the air-flow road of gas outlet, be provided with ozone decomposition catalyst 16,, do not carry out resolution process to having with the ozone of harmful substance reaction, in order to avoid in atmosphere, discharge harmful ozone as active carbon.Being connected of 7 electrodes and power supply N expressed in signal among the figure.Arrow among the figure is represented the air current flow direction.
Fig. 6 adds the structural representation that series hybrid is used the gas purifier of forming by the gas circuit parallel connection of unit block.In this embodiment, use identical upper and lower two groups.In each group, two-layer tabular photocatalysis porous body is arranged, this two-layer porous body respectively with last, in or in, under two planar electrodes and dielectric barrier thereof constitute gas channel.As above in the group, 18 and 20 are two-layer tabular photocatalysis porous body, and porous body 18 and top electrode 19 constitute pair of discharge electrodes, and porous body 20 and middle electrode 21 constitute pair of discharge electrodes.The contaminated gas that passes porous body 18 enters adsorption layer 22, and then passes porous body 20 and enter exhaust duct, passes adsorption layer again from venthole and just is discharged to the external environment condition.Present embodiment makes the double photocatalysis porous body that passes of pernicious gas, by photocatalysis degradation organic contaminant, can further improve the gas purification treatment effect, is applicable to the contaminated serious situation of gas.Arrow among the figure is represented the air current flow direction, and also being connected of 7 electrodes and power supply N expressed in signal in addition.
Claims (4)
1. plasma coupling photo catalytic unit block, comprise electrode, electrode supply and photocatalysis body, it is characterized in that: described electrode is a tabular, two parallel placements of planar electrode, be respectively equipped with the dielectric barrier of rigidity in the inboard of two electrode plate, described photocatalysis body has been the appendix tabular porous body of photochemical catalyst, this tabular porous body is placed on the centre of two dielectric barriers, all there is the space both sides, periphery at two dielectric barrier flat boards is provided with sealing baffle, make between tabular porous body and two dielectric barriers and form two spaces, offer air admission hole on the sidewall in a space therein, and on the opposite side wall in another space, set out pore, two are respectively equipped with into, constitute gas channel by the connection of the hole on the tabular porous body between the space of venthole.
2. plasma coupling photo catalytic unit block as claimed in claim 1, it is characterized in that, one of described electrode with appendix the tabular porous body of photochemical catalyst replace one of them electrode, this porous body and the parallel placement of another planar electrode, be provided with the dielectric barrier of rigidity in the inboard of planar electrode, between this dielectric barrier and the tabular porous body space is arranged, periphery at dielectric barrier and tabular porous body is provided with sealing baffle, and on sidewall, offer hole as air inlet, make between porous body and the dielectric barrier to form the space that is provided with air inlet, and and porous body on the hole be communicated with and constitute gas channel.
3. the gas purifier that uses the described plasma coupling photo catalytic unit block of claim 1 or claim 2 to make, comprise housing and gas purification assembly, it is characterized in that, described gas purification assembly is above-mentioned plasma coupling photo catalytic unit block, has one group in every gas purifier at least.
4. gas purifier as claimed in claim 3 is characterized in that, the many groups of use plasma coupling photo catalytic unit blocks, the in parallel and/or series connection of its gas channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101062327A CN100494794C (en) | 2003-11-06 | 2003-11-06 | Plasma coupling light catalytic unit assembly and gas purifier therewith |
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|---|---|---|---|
| CNB2003101062327A CN100494794C (en) | 2003-11-06 | 2003-11-06 | Plasma coupling light catalytic unit assembly and gas purifier therewith |
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|---|---|
| CN1614321A true CN1614321A (en) | 2005-05-11 |
| CN100494794C CN100494794C (en) | 2009-06-03 |
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| CNB2003101062327A Expired - Fee Related CN100494794C (en) | 2003-11-06 | 2003-11-06 | Plasma coupling light catalytic unit assembly and gas purifier therewith |
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| WO2008040154A1 (en) * | 2006-09-05 | 2008-04-10 | Alphatech International Limited | Diffusive plasma treatment and material procession |
| CN1864820B (en) * | 2006-04-21 | 2010-05-12 | 中国人民解放军军事医学科学院卫生学环境医学研究所 | A low temperature plasma driven photocatalytic gas purification device |
| CN102056392A (en) * | 2010-12-17 | 2011-05-11 | 中国科学技术大学 | Method for generating cold plasma by discharge under high pressure and dielectric barrier discharge device |
| CN102091514A (en) * | 2010-12-28 | 2011-06-15 | 浙江大学 | Device and method for treating obnoxious gas and industrial VOCs |
| US8361402B2 (en) | 2005-07-20 | 2013-01-29 | Alphatech International Limited | Apparatus for air purification and disinfection |
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| CN111529747A (en) * | 2020-04-30 | 2020-08-14 | 清华大学 | Plasma air sterilizing device |
| CN113227668A (en) * | 2018-12-27 | 2021-08-06 | 三星电子株式会社 | Blower and air conditioner having the same |
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| JP2002250533A (en) * | 2001-02-23 | 2002-09-06 | Sharp Corp | Ion generator apparatus and air control apparatus using same |
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| US8361402B2 (en) | 2005-07-20 | 2013-01-29 | Alphatech International Limited | Apparatus for air purification and disinfection |
| CN1864820B (en) * | 2006-04-21 | 2010-05-12 | 中国人民解放军军事医学科学院卫生学环境医学研究所 | A low temperature plasma driven photocatalytic gas purification device |
| WO2008040154A1 (en) * | 2006-09-05 | 2008-04-10 | Alphatech International Limited | Diffusive plasma treatment and material procession |
| CN101799203B (en) * | 2009-02-10 | 2014-04-09 | 上海嘉顿环保科技有限公司 | Plasma nano photocatalysed air purifying and sterilizing device for air-conditioning system |
| CN102056392B (en) * | 2010-12-17 | 2015-08-12 | 中国科学技术大学 | A kind of hyperbar electric discharge produces method and the dielectric barrier discharge device of cold plasma |
| CN102056392A (en) * | 2010-12-17 | 2011-05-11 | 中国科学技术大学 | Method for generating cold plasma by discharge under high pressure and dielectric barrier discharge device |
| CN102091514A (en) * | 2010-12-28 | 2011-06-15 | 浙江大学 | Device and method for treating obnoxious gas and industrial VOCs |
| CN102091514B (en) * | 2010-12-28 | 2013-07-03 | 浙江大学 | Device and method for treating obnoxious gas and industrial VOCs |
| CN103120922A (en) * | 2013-02-06 | 2013-05-29 | 浙江工商大学 | Gas plasma discharging reactor loaded with salt catalyst and application method |
| CN103120922B (en) * | 2013-02-06 | 2015-06-24 | 浙江工商大学 | Gas plasma discharging reactor loaded with salt catalyst and application method |
| CN104056532A (en) * | 2013-03-20 | 2014-09-24 | 刘颖姝 | Catalyst plasma and tunnel plasma comprising catalyst plasma |
| CN108025252A (en) * | 2015-09-17 | 2018-05-11 | 马尔凯理工大学 | Air cleaning facility and method |
| CN108025252B (en) * | 2015-09-17 | 2021-08-31 | 马尔凯理工大学 | Air cleaning apparatus and method |
| CN106102294A (en) * | 2016-08-05 | 2016-11-09 | 江苏河海新能源股份有限公司 | A kind of microporous medium barrier plasma reactor |
| TWI612981B (en) * | 2016-12-28 | 2018-02-01 | Univ Chung Yuan Christian | Sterilized plasma system |
| CN107998849A (en) * | 2017-12-28 | 2018-05-08 | 青岛旭日环保科技有限公司 | A kind of low temperature plasma waste gas cleaning device |
| CN111354616A (en) * | 2018-12-21 | 2020-06-30 | 夏泰鑫半导体(青岛)有限公司 | Semiconductor processing equipment |
| CN113227668A (en) * | 2018-12-27 | 2021-08-06 | 三星电子株式会社 | Blower and air conditioner having the same |
| CN113227668B (en) * | 2018-12-27 | 2023-02-28 | 三星电子株式会社 | Blower and air conditioner having the same |
| CN111529747A (en) * | 2020-04-30 | 2020-08-14 | 清华大学 | Plasma air sterilizing device |
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Granted publication date: 20090603 Termination date: 20091207 |