CN101204589A - Integrated air purification method - Google Patents
Integrated air purification method Download PDFInfo
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- CN101204589A CN101204589A CNA2006101677594A CN200610167759A CN101204589A CN 101204589 A CN101204589 A CN 101204589A CN A2006101677594 A CNA2006101677594 A CN A2006101677594A CN 200610167759 A CN200610167759 A CN 200610167759A CN 101204589 A CN101204589 A CN 101204589A
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Abstract
The invention discloses an integration air purification method with wide-adaptability and high efficiency, which comprises the steps of adsorption regeneration, low temperature plasma catalyst coupling purification and tail gas absorption. First, concentration and enrichment of the harmful gas with the low concentration of 1-100ppm and air volume of 50-1000m<3>/h are carried out by adopting regenertation adsorption plant, so as to obtain clean air capable of being directly discharged; then electric heating in-situ regeneration is carried out to an absorption bed layer, so as to release gaseous pollutant with the concentration of 10-2000ppm and air volume of 2.5-50m<3>h into a low temperature plasma reactor; next, the harmful air is decomposed and mineralized during passing an catalyst bed layer; thereby, harmful microorganism and bacteria is sterilized and the side product in the tail gas is absorbed; as a result, clean air is obtained.
Description
Technical field
The invention belongs to the environmental protection field, relate in a kind of can effectively the elimination, the integrated air purification techniques of low concentration gaseous pollutant and microorganism.This technology can be used to improve IAQ (indoor air quality), and the particularly airtight and spatial air quality of semi-hermetic also is simultaneously a kind of effective ways that solve middle-size and small-size chemical plant, pharmaceutical factory, paper mill and other enterprise's gaseous contaminant discharging.
Background technology
Along with the progress of science and technology and the development of human civilization, the air quality that the mankind depend on for existence is but descending, and especially room air pollution is also being increasingly sharpened.Room air pollution mainly is that harmful biodegradable organic compounds pollutes and microbial contamination, its source mainly contains the medicated clothing of paint, adhesive, carpet, fabric, cosmetics, mothproofing agent, air freshener, dry-cleaning etc., and more common and harm is bigger in the solvent toluene that volatilizes in the formaldehyde that volatilizes in the artificial board, the furniture, the ground cushion evaporable vinyl chloride etc.At present, detected 350 kinds of different VOCs in the room air, kind has aliphatic hydrocarbon, halogenated hydrocarbons, aromatic hydrocarbon, alcohol, aldehyde, ketone, ester etc., and wherein main pollutant are formaldehyde, benzene, toluene, fluorine Lyons compounds, chloroform etc.These pollutions can cause multiple disease, as leukemia, cancer etc.Therefore, human settlements green environment how to create a cleaning is the cardinal task that is related to the healthy even life security of broad masses of the people.
In addition, airtight or semi-hermetic spaces at some in space capsule, large-scale machine room, submarine, civil air defense works, subway, underground fortification or the like, are subjected to strict restriction with the ventilation in the external world or may ventilate.The release of the operation of personnel's physiological activity, equipment and machine, various construction material, ornament materials and equipment and materials itself even the cooking are cooked, and all can produce a large amount of harmful gass.Indoor chemical pollutant produces harm to health, even the VOCs of low concentration also can cause the generation of acute and chronic disease, has been confirmed to be carcinogen such as benzene, formaldehyde, trichloroethane, trichloroethylene, Polychlorinated biphenyls (PCB).Owing to lack the direct ventilation with extraneous fresh air, therefore cause the accumulation of all contaminations, if these gaseous contaminants can not be eliminated timely, will certainly influence the healthy of staff.
Moreover in some middle-size and small-size chemical plant, pharmaceutical factory, paper mill and other enterprise, the concentration of pollutant may not be very high in the emission gases, but will be considerably beyond national specified discharge standard.This discharging gas, if adopt traditional adsorption method, the one, treating capacity is big, and the 2nd, cost is higher, need often to change adsorbing material, and depleted adsorbing material also needs changeing of manpower, and further destroys.
The filter that generally adopts only has filtration to a certain size suspended particulate contaminants at present, and can only adsorb gaseous contaminant a certain amount of, particular types, and the airborne most gaseous contaminants of indoor or outdoors are not had scavenging action.Absorption method is the indoor air purification method of present extensive use, active carbon class adsorbent has wide spectrum, efficient, characteristics that adsorption capacity is big, be applied to inner air cleaning such as room, office, also be applied to the air cleaning of special environment indoor such as chip workshop, submarine work chamber, spacecraft cabin.Absorption method just effectively is reduced to gas pollutant certain standard, the inreal gaseous contaminant of removing.In addition, adsorb and promptly lost efficacy after saturated, need the periodic replacement adsorbing material.Absorption method can not be removed micromolecule pollutant such as methane, ethylene, carbon monoxide, hydrogen, and the removal effect of PARA FORMALDEHYDE PRILLS(91,95) is also very poor, simultaneously for microorganism also without any effect.At this point, adopt catalysis technique that pollutant such as methane, ethylene, carbon monoxide, hydrogen and other VOCs are eliminated purification in some occasions.The operating temperature height of catalytic combustion bed usually at 300～500 ℃, needs heat-exchange apparatus to discharging the gas cooling.The object of catalysis material purification simultaneously is more single, especially is lower than the contaminant gases of 1000ppm for concentration, and the energy expenditure that deals with is bigger.Fa Ming photocatalysis technology on principle, can handle various gaseous contaminants and microorganism under the temperature of gentleness, but its catalytic efficiency was very low in recent years, and the pollutant for handling big air quantity do not have great effect basically.
Summary of the invention
The objective of the invention is to propose a kind of integrated air purification method with broad spectrum activity and high efficiency.
This method is integrated renewable adsorption technology, lower temperature plasma technology and catalysis technique.At first, adopt renewable adsorbent equipment to harmful gas big air quantity, low concentration concentrate, enrichment, then adsorbing material is regenerated, discharge gaseous contaminant high concentration, little air quantity and enter into the reaction of low temperature plasma device, and pass through beds, harmful gas is decomposed, mineralising, and detrimental microorganisms, antibacterial are killed, and obtain pure air.The present invention can handle the gas of big air quantity, and can be simultaneously effectively, do not have the various gaseous contaminants of selecting of degraded, and sterilization is a kind of efficient, broad-spectrum integrated air purification method.
The invention is characterized in that described air purification method is concentrated by absorption, the coupling of low-temperature plasma catalyst purifies and the tail gas absorption is formed.At first, adopt regenerative sorption device to 50～1000m
3Harmful gas/h air quantity, 1ppm～100ppm low concentration concentrates, enrichment, and the pure air that obtains can directly discharge, and then adsorption bed is carried out original position electrical heating regeneration, discharge 10ppm～2000ppm concentration, 2.5～50m
3The gaseous contaminant of/h air quantity enters into the reaction of low temperature plasma device, and by beds, harmful gas is decomposed, mineralising, and detrimental microorganisms, antibacterial are killed, and the by-product in the tail gas is absorbed, and obtains pure air.
Described renewable absorption is characterised in that the renovation process of employing is the electrical heating desorption, adds the voltage of 2V to 380V on active carbon bed, utilizes the active carbon self-resistance to produce heat, make its adsorbed organic matter desorption, 50 ℃ to 450 ℃ of desorption temperatures, desorption medium is an air, and water vapour.Be filled with active carbon in the adsorption bed, flooded the active carbon of other components, or the combination of various active charcoal.
Described low temperature plasma is characterised in that the discharge mode of employing is the dielectric barrier discharge under the high-frequency and high-voltage power supply effect; Frequency range is between 1KHz～100KHz, and high pressure is between 1KV～10KV, and discharge power is between 20W～1000W; Block media is quartz glass, pottery or Muscovitum, and the mode of stopping is single dielectric impedance or bi-medium to block, and reactor is tubular reactor or plate-type reactor, and high-field electrode is zigzag, star, prickle shape, fishbone, line electrode, pipe electrode or needle electrode.Low-field electrode can adopt the metal film of metal forming, wire netting, metal tube or plating.
Described catalyst is characterised in that the carrier of catalysis material is aluminium oxide, molecular sieve, mesopore molecular sieve, silicon oxide, active carbon or NACF, active component is any one corresponding metal of two or three or oxide among Fe, Co, Ti, Cu, Mn, Pt, Pd, Au, Rh or the Ag, and preparation method is incipient impregnation, base exchange method, improved deposition-precipitation method, chemical vapour deposition technique or direct current magnetron sputtering method.The coupled modes of plasma technique and catalysis technique are that catalyst is loaded in outside the intravital region of discharge of plasma, twilight sunset district and the plasma reactor, can load a kind of, two or three catalyst simultaneously.
Air purification method of the present invention has following feature:
(1) have high efficiency, disposable degradation rate to gaseous contaminant is more than 90%;
(2) have the biological protection function, to the inactivation ratio of antibacterial, microorganism more than 95%;
(3) have broad spectrum activity, various known, unknown gaseous contaminants are all had certain degradation capability;
(4) do not have secondary pollution, mineralization rate can be up to more than 85%;
(5) disposal ability is big, even also can handle for the gaseous contaminant of big air quantity;
(6) processing pollutant levels scope is bigger,, can handle to the percentage composition level from the ppm level;
(7) long-life.Adsorbing material can obtain regeneration by constantly separating adsorption desorption, therefore have long service life, and catalyst is not subject to the interference of environment owing to the high-energy that has plasma field to supply with, and therefore also has secular stability.
(8) scope of application is wide, can be used in the occasion that any needs purify air.
The specific embodiment
At volume is 200m
3The evaluation case in, feed continuously the contaminated air of CO of chloroform, the 100ppm of formaldehyde, the 100ppm of the benzene that contains 50ppm, 100ppm, with 200m
3The air quantity of/h enters into renewable adsorption tower.Adsorption tower is filled with Fe/SBA-15, the mesoporous TiO of Ag/
2, mesopore activated carbon.After absorption in 10 hours, use 20m
3150 ℃ of hot-airs of/h air quantity oppositely purged 3 hours, carried out the desorbing of gaseous contaminant.The gas that contains the higher concentration pollutant that desorbing obtains enters into the reaction of low temperature plasma device.The power supply discharge voltage is 10 000V, and frequency is 120KHz, and power is 1000W.Adopt the tubular type dielectric barrier discharge, single dielectric impedance, medium are earthenware, and high-field electrode is a pipe electrode, and low-field electrode is a metal tube.Adopt the Au/Al that improves the deposition-precipitation method preparation
2O
3Catalyst and the Ag/ZSM-5 that adopts ion exchange to prepare are loaded in the region of discharge of tubular type plasma reactor.
Detect renewable adsorbent equipment exit gas concentration, all between 0～10ppm, CO concentration is between 0～30ppm for the concentration of benzene, formaldehyde, chloroform in good time, and the gas air quantity is 200m
3/ h.All between 0～20ppm, CO concentration is between 0～8ppm for the concentration of the outlet pollutant of plasma and catalytic bed, the concentration of benzene, formaldehyde, chloroform, and the gas air quantity is 20m
3/ h.
Claims (4)
1. an integrated air purification method is characterized in that described air purification method is concentrated by absorption, the coupling of low-temperature plasma catalyst purifies and the tail gas absorption is formed; At first adopt regenerative sorption device to 50～1000m
3Harmful gas/h air quantity, 1ppm～100ppm low concentration concentrates, enrichment, and the pure air that obtains can directly discharge, and then adsorption bed is carried out original position electrical heating regeneration, discharge 10ppm～2000ppm concentration, 2.5～50m
3The gaseous contaminant of/h air quantity enters into the reaction of low temperature plasma device, and by beds, harmful gas is decomposed, mineralising, and detrimental microorganisms, antibacterial are killed, and the by-product in the tail gas is absorbed, and obtains pure air.
2. air purification method according to claim 1, it is characterized in that adsorbing the renovation process that concentrates employing is that power transformation adds thermal desorption, on active carbon bed, add the voltage of 2V to 380V, utilize the active carbon self-resistance to produce heat, make its adsorbed organic matter desorption, 50 ℃ to 450 ℃ of desorption temperatures, desorption medium is an air, and water vapour; Be filled with active carbon in the adsorption bed, Immesion active carbon, or the combination of multiple active carbon.
3. air purification method according to claim 1 is characterized in that the discharge mode that low temperature plasma adopts is the dielectric barrier discharge under the high-frequency and high-voltage power supply effect; Frequency range is between 1KHz～100KHz, and high pressure is between 1KV～10KV, and discharge power is between 20W～1000W; Block media is quartz glass, pottery or Muscovitum, and the mode of stopping is single dielectric impedance or bi-medium to block, and reactor is tubular reactor or plate-type reactor, and high-field electrode is zigzag, star, prickle shape, fishbone, line electrode, pipe electrode or needle electrode.Low-field electrode can adopt the metal film of metal forming, wire netting, metal tube or plating.
4. air purification method according to claim 1, the carrier that it is characterized in that catalyst is aluminium oxide, molecular sieve, mesopore molecular sieve, silicon oxide, active carbon or NACF, active component is any one corresponding metal of two or three or oxide among Fe, Co, Ti, Cu, Mn, Pt, Pd, Au, Rh or the Ag, and preparation method is incipient impregnation, base exchange method, improved deposition-precipitation method, chemical vapour deposition technique or direct current magnetron sputtering method.The coupled modes of plasma technique and catalysis technique are that catalyst is loaded in outside the intravital region of discharge of plasma, twilight sunset district and the plasma reactor, can load a kind of, two or three catalyst simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101677594A CN101204589A (en) | 2006-12-21 | 2006-12-21 | Integrated air purification method |
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| CNA2006101677594A CN101204589A (en) | 2006-12-21 | 2006-12-21 | Integrated air purification method |
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| CN101204589A true CN101204589A (en) | 2008-06-25 |
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| CNA2006101677594A Pending CN101204589A (en) | 2006-12-21 | 2006-12-21 | Integrated air purification method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791506A (en) * | 2009-04-30 | 2010-08-04 | 宁波大学 | Industrial organic exhaust gas active-carbon bed plasma integrated purification technology and device thereof |
| CN101513586B (en) * | 2009-02-27 | 2011-07-06 | 重庆大学 | Reactor for eliminating oil smoke and foreign odor thereof |
| US20160199806A1 (en) * | 2013-08-23 | 2016-07-14 | Saudi Basic Industries Corporation | Reactor comprising a plasma source and a catalyst comprising a mesoporous support material for the preparation of ethene from methane |
| CN105797579A (en) * | 2016-05-17 | 2016-07-27 | 武汉大学 | Technology for catalytically treating VOCs by means of synergy between plasma and mesoporous |
| CN106268170A (en) * | 2015-06-29 | 2017-01-04 | E.G.O.电气设备制造股份有限公司 | For regenerating method and the adsorbent equipment of VOC adsorber |
| CN107670080A (en) * | 2017-11-03 | 2018-02-09 | 济南芯乐智能设备有限公司 | The method and apparatus that a kind of refrigerator removes peculiar smell sterilizing |
| CN114413400A (en) * | 2022-01-25 | 2022-04-29 | 山东大学 | System and method for purifying air by virtue of steam-water coupling low-temperature plasma |
-
2006
- 2006-12-21 CN CNA2006101677594A patent/CN101204589A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101513586B (en) * | 2009-02-27 | 2011-07-06 | 重庆大学 | Reactor for eliminating oil smoke and foreign odor thereof |
| CN101791506A (en) * | 2009-04-30 | 2010-08-04 | 宁波大学 | Industrial organic exhaust gas active-carbon bed plasma integrated purification technology and device thereof |
| CN101791506B (en) * | 2009-04-30 | 2012-11-28 | 宁波大学 | Industrial organic exhaust gas active-carbon bed plasma integrated purification technology and device thereof |
| US20160199806A1 (en) * | 2013-08-23 | 2016-07-14 | Saudi Basic Industries Corporation | Reactor comprising a plasma source and a catalyst comprising a mesoporous support material for the preparation of ethene from methane |
| US9770700B2 (en) * | 2013-08-23 | 2017-09-26 | Saudi Basic Industries Corporation | Reactor comprising a plasma source and a catalyst comprising a mesoporous support material for the preparation of ethene from methane |
| CN106268170A (en) * | 2015-06-29 | 2017-01-04 | E.G.O.电气设备制造股份有限公司 | For regenerating method and the adsorbent equipment of VOC adsorber |
| CN106268170B (en) * | 2015-06-29 | 2021-07-02 | E.G.O.电气设备制造股份有限公司 | Method and adsorption device for regenerating VOC adsorbers |
| CN105797579A (en) * | 2016-05-17 | 2016-07-27 | 武汉大学 | Technology for catalytically treating VOCs by means of synergy between plasma and mesoporous |
| CN105797579B (en) * | 2016-05-17 | 2019-05-10 | 武汉大学 | A kind of technique of the mesoporous catalytic treatment VOCs of plasma body cooperative |
| CN107670080A (en) * | 2017-11-03 | 2018-02-09 | 济南芯乐智能设备有限公司 | The method and apparatus that a kind of refrigerator removes peculiar smell sterilizing |
| CN114413400A (en) * | 2022-01-25 | 2022-04-29 | 山东大学 | System and method for purifying air by virtue of steam-water coupling low-temperature plasma |
| CN114413400B (en) * | 2022-01-25 | 2023-03-10 | 山东大学 | System and method for purifying air by virtue of steam-water coupling low-temperature plasma |
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Open date: 20080625 |