CN1478586A - New type multifunction dual-dimension gas-solid gas-liquid coupling fluidized bed photo catalysis air purifying system - Google Patents
New type multifunction dual-dimension gas-solid gas-liquid coupling fluidized bed photo catalysis air purifying system Download PDFInfo
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- CN1478586A CN1478586A CNA021295115A CN02129511A CN1478586A CN 1478586 A CN1478586 A CN 1478586A CN A021295115 A CNA021295115 A CN A021295115A CN 02129511 A CN02129511 A CN 02129511A CN 1478586 A CN1478586 A CN 1478586A
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Abstract
A photocatalytic air-purifying system is composed of the photocatalytic gas-solid fluidized-bed reactor which consists of axial-flow fan (or pump), casing, granular photocatalyst (TiO2), disinfecting ultraviolet lamp, distributing plate, baffle plate, etc. and the gas-liquid fluidized-bed absorber which consists of casing, gas desending tube, gas redistributing plate, overflow plate, etc. Its advantages are high purifying effect, and high photocatalyzing efficiency.
Description
The present invention relates to a kind of new type multifunction dual-dimension gas-solid and gas-liquid coupling fluidized bed photo catalysis air purifying system, belong to the innovation of air purification field.
Statistics shows that people have the time of 80-90% to spend indoor at present, and it is just longer that infant, the old,weak,sick and disabled person stay in the indoor time.The quality of IAQ is directly connected to people's physical and mental health, thereby room air pollution has also just become one of focus of common people's concerns.In fact, room air pollution has become the human beings'health killer.Statistics shows, the whole world has 68% disease relevant with room air pollution approximately at present, and it is due to the room air pollution that developing country has 2,000,000 examples to exceed the quata dead every year.China every year just surpasses 110,000 by the death toll that exceeds the quata that room air pollution causes, only the economic loss that causes because of indoor pollution harm of China is just up to 10,700,000,000 dollars nineteen ninety-five, and as seen room air pollution has become the global public hazards that have a strong impact on human health.Good indoor air-purification device is provided, sets up the active demand that clean living space has become people.
Indoor air pollutants mainly contains following a few class: (1) radioactive pollution mainly is radioactive substance radon and the decay constant thereof that derives from soil, building and ornament materials etc.; (2) volatile organic matter (VOC), as benzene, toluene, dimethylbenzene, formaldehyde, hydro carbons, chloroforms etc. wherein much are strong carcinogen.They are mainly derived from smog of building and ornament materials, coating, paint, carpet, hot shower, cigarette etc.; (3) other pernicious gases, as: nitride, sulfide, arsenide etc. mainly come from the burning of building and ornament materials and fossil fuel; (4) pellet is as micronic dust floating in the air; (5) microorganism is as bacterium, virus and mould etc.
The method of indoor air purification mainly comprises: (1) physical method: promptly adopt the pollutant in the method traps air such as filtration, absorption and electro-deposition, this type of technology is destroy contaminants fundamentally, and the pollutant that become trapped in will cause secondary pollution to environment in last handling process; (2) thermocatalytic: under uniform temperature, carry out catalytic oxidation and decompose harmful substances in air.Volatile organic matter during though this method can thoroughly purify air and part pernicious gas, the heat that produces in using can cause environment temperature to raise, and its range of application is restricted, and also causes some unnecessary accidents easily; (3) photocatalysis: be under the effect of ultraviolet light (UV), the harmful substance in decomposition of semiconductor light-catalyst surface or oxidation air.Studies show that photocatalysis almost can be decomposed into harmless carbon dioxide and water with volatile organic matters all in the air (VOC), and can kill various germs effectively, also pernicious gas nitride, sulfide and arsenide etc. can be oxidized to oxide (as NO simultaneously
x, SO
xDeng) form.
Though the research about photocatalysis air-cleaning is a lot, realize that the scale application remains at obstacle, mainly be to lack the highly effective photocatalytic reactor that can remove all contaminants in the air.Use " film " reactor to implement photocatalysis air-cleaning at present mostly (as United States Patent (USP) 4954465,5933702; Utility model patent: 99217659.X, utility application 91232342.6 etc.), be about to semiconductor catalyst (as TiO
2Deng) being coated on reactor wall and inner member surface, the air reactor of flowing through under UV-irradiation on photocatalyst surface (reactor wall, inner member surface etc.), resolves into innocuous substance with pollutant.The contact area of air and catalyst is little in this class reactor, and most of air does not reach the catalyst that is coated in reactor wall at all when flowing through reactor.Because light-catalyzed reaction only just can take place under the acting in conjunction of ultraviolet light and photochemical catalyst, so the catalysis scrubbing efficient of this class reactor is low.In order to improve catalysis scrubbing efficient, people adopted fixed bed photocatalytic reactor with the contacting efficiency that increases air and catalyst (as United States Patent (USP): 5045288, utility model patent: 9720552.9 etc.), but also there is wretched insufficiency in fixed bed photocatalytic reactor: (1) is because light can not see through catalytic bed, so have only the catalyst on fixed bed surface to work, cause catalyst utilization low; (2) pressure drop and the particle diameter of gas by fixed bed square is inversely proportional to, and is directly proportional with bed height, and the amplification of fixed bed Photoreactor is difficulty comparatively.
Fluidized-bed reactor can be realized the efficient contact of gas-solid (catalyst), is comparatively desirable photo catalysis reactor.Photocatalysis fluid bed reactor is used for sewage disposal (as application number is 00112091.3 patent of invention, utility model patent 00219445.7 etc.) morely, also is used to air cleaning.Raupp is 5045288 United States Patent (USP) " gas-solid photochemical catalytic oxidation environmental contaminants " (Gas-solid photocatalytic oxidation of environmental pollutants in the patent No., US Patent 5045288, Sep.3,1991) adopt the fluidized bed photo catalysis reactor to purify air in, this patent relates to a three-dimensional fluidized bed photo catalysis reactor, and the UV light source places outside the reactor.Wang Liangyan etc. are at utility model patent " photocatalysis air processor " (patent No. 99236007.2) " in also designed a kind of photocatalysis fluid bed air purifier, this reactor is the three-dimensional bed of a upright barrel type fluid bed, the UV light source places in the reactor.
Gas-solid contacting efficiency is good though the fluidized bed photo catalysis reactor has, ultraviolet light utilization rate advantages of higher, but also there is following deficiency in existing fluidized bed photo catalysis air purifying technology: (1) causes the secondary dust pollution easily: because the relative motion of catalyst granules in fluid bed, and with the collision and the friction of wall, lamp sheath etc., produce subparticle inevitably, fine particle is very easily carried elutriation secretly and in the inlet chamber, is caused the secondary dust pollution with gas.Fine dust (particularly particle diameter is less than the dust of 1 μ m) easily enters human body with breathing in the difficult sedimentation of air pole, gos deep into lung, causes various respiratory diseases, and is very big to human health damage.Therefore simply conventional method (as cyclonic separation) is difficult to remove the fine dust in the fluid bed tail gas, and removing fine dust in the fluidized bed photo catalysis reactor outlet tail gas efficiently, avoiding causing the secondary dust pollution is the key that the fluidized bed photo catalysis reactor is successfully applied to indoor air purification.(2) air cleaning is not thorough: existing fluidized bed photo catalysis reactor can only purify harmful substances such as airborne organic volatile, bacteriums, can not effectively remove airborne pellet, radioactive pollutant and deleterious acidic gas (SO
x, NO
x, CO
2Deng).Therefore existing fluidized bed photo catalysis air purifying technology still can not realize the thorough purification of room air.(3) amplification is difficult for: prior art generally adopts the three-dimensional fluidized bed reactor, because ultraviolet light penetration range in fluid bed is limited, the major diameter three-dimensional fluidized bed that surpasses the ultraviolet light penetration range for radius, the catalyst that is positioned at wall place, limit just can't touch ultraviolet light, so also there is the problem of amplifying difficulty in the three-dimensional fluidized bed photo catalysis reactor.
The present invention is just at the above-mentioned deficiency of prior art, designed a kind of new type multifunction dual-dimension gas-solid and gas-liquid coupling fluidized bed photo catalysis air purifying system, can effectively remove airborne all contaminations, air is carried out deep purifying, and have simultaneously simple in structure, be easy to amplification, photocatalysis efficiency height, characteristics such as safe and reliable.
Target of the present invention is achieved by the following scheme:
The air cleaning system of the present invention design mainly by gas-solid fluid bed photo catalysis reactor gentle-liquid fluidized-bed reaction absorber two parts are coupled to form.
Gas-solid fluidized bed reactor is a bidimensional fluid bed, being made of housing, uviol lamp, lamp sheath, semiconductor light-catalyst, aerofoil fan (pump), gas filtration distribution grid, top hydraulic barrier and filter screen, is the reactor of microorganisms such as gas pollutant in the photocatalysis Decomposition air (volatile organic matter and other pernicious gases) and kill bacteria.The thickness of bidimensional bed is less than or equal to the twice of ultraviolet light maximum penetration thickness in fluid bed, can guarantee that all catalyst can both touch ultraviolet light, the width of bidimensional bed is determined by the tolerance of handling, by regulating the width of bidimensional bed, can adapt to different occasions to handling the demand of tolerance, also can realize at an easy rate amplifying.
Gas-liquid fluidized-bed reaction absorber also is a bidimensional fluid bed, distribution grid, rinse water outlet, discharge plate and water etc. are formed again by water tank, porous gas, be used for the air through gas-solid fluid bed photo catalysis reactor preliminary purification is carried out the degree of depth, thoroughly purifies, remove airborne fine dust (comprising pellet, radioactive dust etc.), pernicious gas (as CO
2, NO
x, SO
xDeng) etc.Through the gas of gas-solid fluidized bed reactor preliminary purification, by the gas of gas-liquid fluid bed absorber bottom again distribution grid enter gas-liquid fluid bed absorber, fully mix with wherein the aqueous solution, remove the fine dust in the tail gas effectively; Can in water, add surfactant, strengthen the adsorption effect of the aqueous solution micronic dust; In absorbing water, add an amount of alkali, absorb airborne sour gas (as CO
2, SO
xAnd NO
xDeng), can also in absorbing water, add suitable spices as required with fresh air.
Principle attractive in appearance according to convenience, as to save floor occupying area, gas-liquid fluidized-bed reaction absorber can place front, back or the side of gas-gas-solids reactors.
Fig. 1 is that cross section is the structural representation of the bidimensional gas-solid fluid bed photo catalysis reactor of flat rectangle.
Fig. 2 is the structural representation of gas-liquid fluid bed absorber.
The invention will be further described below in conjunction with accompanying drawing.
Contaminated air (1) blasts reactor inlet through aerofoil fan (2), enter photo catalysis reactor (5) by gas filtration distribution grid (3), make fully fluidization of catalyst (4), the airborne gas pollutant of catalytic decomposition and under the irradiation of uviol lamp (7) to the air sterilization of killing virus, pass through deflection plate (8) then and filter screen (9) is trapped particle wherein substantially, air after preliminary purification is discharged by reactor outlet (10), enters gas-liquid fluidized-bed reaction absorber and carries out deep purifying.
Air through the light-catalyzed reaction preliminary purification enters gas-liquid fluidized-bed reaction absorber by gas down pipe (11), by gas again distribution grid (15) disperse to enter the aqueous solution, by reaction absorb enter behind the fine particle removed wherein and the evil gas indoor.Wherein, 12 is aqueous solution uptake zone, and 13 is the discharge district, and 14 is the rinse water outlet, and 16 for absorbing the aqueous solution, and 17 is the discharge plate, and 18 is the open-top mouth, discharges and absorb water for Purge gas to add.
The invention provides a kind of new type multifunction dual-dimension gas-solid and gas-liquid fluidized bed photo catalysis air purifying system, can overcome the deficiencies in the prior art, remove airborne pollutant efficiently.This system has following distinguishing feature:
1) adopts the bidimensional fluidized-bed reactor, make photo catalysis reactor be easy to amplify, be applicable to different occasions;
2) gas-liquid fluidized-bed reaction absorber can remove effectively airborne pellet, radioactive dust and
Fine dusts by gas-gas-solids reactors produces thoroughly removes micro mist dust pollution in the air;
3) gas-airborne CO of liquid fluidized-bed reaction absorber absorbing and removing
2, NO
x, SO
xDeng sour gas, can be right
Air is implemented deep purifying;
In sum, the designed fluidized bed photo catalysis air purifying system of the present invention not only can equally with prior art decompose airborne volatile organic contaminant effectively, kill airborne germ, also avoid the prior art to be easy to generate the secondary dust pollution simultaneously, and overcome the shortcoming that prior art can not effectively remove airborne pellet and deleterious acidic gas.
The designed fluidized bed photo catalysis air purifying system of the present invention can remove all contaminants that comprises volatile organic matter (VOC), radioactive pollution, pernicious gas (nitride, sulfide, arsenide etc.), pellet and microorganism (bacterium, virus and mould etc.) etc. in the air comprehensively, and contaminated air is thoroughly purified.This air cleaning system is applicable to carries out air cleaning to room, places such as (as hospitals, school, cinema etc.), public place.
Embodiment one
Gas-solid fluid bed photo catalysis reactor housing adopts the aluminium sheet material of 3-5mm.Be to increase the utilization rate of light, plate reflective material at the housing internal layer of this reactor, gas-liquid fluid bed absorber adopts common plastic material.Catalyst adopts the most frequently used photochemical catalyst TiO
2, particle diameter is at the 20-50 micron, and light source adopts high-pressure sodium lamp.
Pending air is sent into gas-solid fluidized bed reactor through aerofoil fan, filter cloth and gas distribution grid.When air is flowed through housing, make the catalyst granules abundant fluidization that suspends, air, catalyst surface and ultraviolet light fully contact, and efficiently airborne organic matter (VOC) are decomposed into carbon dioxide He Shui, with sulfide (H
2S etc.), nitride (NH
3Deng) catalytic oxidation is oxide, kill bacteria, virus etc. simultaneously.Through the air of preliminary purification deflection plate and filter cloth by reactor head, enter gas-liquid fluid bed absorption cleaning device again after filtering larger particles catalyst wherein, wash fine dusts wherein off, comprise radioactive dust.The NaOH that adds an amount of 0.1N in absorbing water absorbs airborne sour gas (as CO
2, SO
x, NO
xDeng), reach the purpose that removes harmful substance fully.Can also in absorbing water, add suitable spices as required simultaneously with fresh air.Air through thoroughly purifying enters indoor by the top air outlet slit of gas-liquid fluid bed absorption cleaning device.
Embodiment two
When catalyst when visible-range has the catalytic activity that purifies air, adopt sunshine as light source.Gas-solid fluid bed photo catalysis reactor housing adopts transparent organic glass or the glass material of 3-5mm, and removes the uviol lamp in the reactor; Gas-liquid fluid bed absorber adopts common plastic material.This gas-solid fluid bed photo catalysis reactor is hung on outdoor being convenient to be subjected on the wall of light.
Claims (10)
1. new type multifunction dual-dimension gas-solid and gas-liquid coupling fluidized bed photo catalysis air purifying system.Contaminated air blasts gas-solid fluidized bed reactor through aerofoil fan, enter photo catalysis reactor by the gas filtration distribution grid, make the abundant fluidization of catalyst granules, catalytic decomposition harmful substances in air and to the air sterilization of killing virus under the irradiation of uviol lamp is removed the large-size particles thing that is suspended in the gas through deflection plate and filter screen then; Discharge by reactor outlet through the preliminary air of evolving of gas-solid fluidized bed reactor, enter gas-liquid fluidized-bed reaction absorber, remove enter behind fine particle in the gas and other pernicious gases indoor.
2. by the described air cleaning system of claim 1,, remove airborne various harmful substance Gu it is characterized in that gas-photo catalysis reactor and gas-liquid fluidized-bed reactor are coupled together comprehensively.
3. by the described gas-solid fluidized bed reactor of claim 1, it is characterized in that adopting the two dimensional fluidized bed reactor, make photo catalysis reactor be easy to amplify, can be used for different occasions.
4. by the described gas-solid fluidized bed reactor of claim 1, it is characterized in that hydraulic barrier and filter screen being set at the top of reactor.
5. by the described gas of claim 1-liquid fluidized-bed reactor, it is characterized in that adopting the principle of reactant aqueous solution absorption, further the air through gas-solid fluidized bed reactor preliminary purification is carried out deep purifying.
6. by the described gas of claim 5-liquid fluidized-bed reactor, it is characterized in that the porous gas distribution grid being set, the washing lotion outlet is set, the discharge plate is set on reactor top at reactor lower part at reactor bottom; In gas-liquid fluidized-bed reactor, add filler (as filling dividing plate etc.), strengthen gas-liquid contact effect.
7. by the described gas of claim 5-liquid fluidized-bed reactor, it is characterized in that adopting aqueous solution absorption system to eliminate the tiny dust thing, avoid causing the dust secondary pollution.
8. by the described gas of claim 5-liquid fluidized-bed reactor, it is characterized in that in solution, adding surfactant, strengthen its removal effect fine dust.
9. by the described gas of claim 5-liquid fluidized-bed reactor, it is characterized in that adding an amount of alkali and form the aqueous solution, remove airborne CO
2, NO
x, SO
xDeng deleterious acidic gas, reach the purpose that removes harmful substance fully.
10. by the described gas of claim 5-liquid fluidized-bed reactor, it is characterized in that adding spices in the aqueous solution with fresh air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02129511 CN1208115C (en) | 2002-08-29 | 2002-08-29 | New type multifunction dual-dimension gas-solid gas-liquid coupling fluidized bed photo catalysis air purifying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02129511 CN1208115C (en) | 2002-08-29 | 2002-08-29 | New type multifunction dual-dimension gas-solid gas-liquid coupling fluidized bed photo catalysis air purifying system |
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| CN1478586A true CN1478586A (en) | 2004-03-03 |
| CN1208115C CN1208115C (en) | 2005-06-29 |
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|---|---|---|---|
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961601A (en) * | 2010-09-03 | 2011-02-02 | 武汉慧邦环境工程技术有限公司 | Waste gas purification system of photocatalytic filter tower |
| CN102921356A (en) * | 2012-10-22 | 2013-02-13 | 江苏华泰重工装备有限公司 | Novel esterification pre-reactor |
| CN103453591A (en) * | 2013-08-14 | 2013-12-18 | 广西大学 | Photocatalytic fluidized bed air purifier |
| CN104602794A (en) * | 2012-11-22 | 2015-05-06 | 株式会社富士工 | Air purifying device |
| CN105413455A (en) * | 2015-12-07 | 2016-03-23 | 徐州猎奇商贸有限公司 | Air purification device |
| CN107029553A (en) * | 2017-06-21 | 2017-08-11 | 中山市科慧物联网科技有限公司 | A kind of high-level cleaner |
| CN109745937A (en) * | 2019-03-19 | 2019-05-14 | 福州大学 | A kind of photocatalysis fluid bed device of two dimension |
| CN111530276A (en) * | 2020-03-26 | 2020-08-14 | 安徽紫荆花壁纸股份有限公司 | Wall paper production dust pelletizing system |
| CN113457407A (en) * | 2021-06-30 | 2021-10-01 | 广西科学院 | Waste gas treatment process for graphene material production |
| CN115057500A (en) * | 2022-06-24 | 2022-09-16 | 中国海洋大学 | Efficient inclined plate photocatalytic reactor |
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2002
- 2002-08-29 CN CN 02129511 patent/CN1208115C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961601A (en) * | 2010-09-03 | 2011-02-02 | 武汉慧邦环境工程技术有限公司 | Waste gas purification system of photocatalytic filter tower |
| CN101961601B (en) * | 2010-09-03 | 2012-08-22 | 武汉慧邦环境工程技术有限公司 | Waste gas purification system of photocatalytic filter tower |
| CN102921356A (en) * | 2012-10-22 | 2013-02-13 | 江苏华泰重工装备有限公司 | Novel esterification pre-reactor |
| CN104602794A (en) * | 2012-11-22 | 2015-05-06 | 株式会社富士工 | Air purifying device |
| CN104602794B (en) * | 2012-11-22 | 2016-03-16 | 株式会社富士工 | Air cleaning unit |
| CN103453591A (en) * | 2013-08-14 | 2013-12-18 | 广西大学 | Photocatalytic fluidized bed air purifier |
| CN105413455A (en) * | 2015-12-07 | 2016-03-23 | 徐州猎奇商贸有限公司 | Air purification device |
| CN107029553A (en) * | 2017-06-21 | 2017-08-11 | 中山市科慧物联网科技有限公司 | A kind of high-level cleaner |
| CN107029553B (en) * | 2017-06-21 | 2023-12-22 | 安徽灵杰环境净化科技有限公司 | High-efficient purifier |
| CN109745937A (en) * | 2019-03-19 | 2019-05-14 | 福州大学 | A kind of photocatalysis fluid bed device of two dimension |
| CN109745937B (en) * | 2019-03-19 | 2021-03-02 | 福州大学 | Two-dimensional photocatalytic fluidized bed device |
| CN111530276A (en) * | 2020-03-26 | 2020-08-14 | 安徽紫荆花壁纸股份有限公司 | Wall paper production dust pelletizing system |
| CN113457407A (en) * | 2021-06-30 | 2021-10-01 | 广西科学院 | Waste gas treatment process for graphene material production |
| CN115057500A (en) * | 2022-06-24 | 2022-09-16 | 中国海洋大学 | Efficient inclined plate photocatalytic reactor |
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| Publication number | Publication date |
|---|---|
| CN1208115C (en) | 2005-06-29 |
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