CN107413175A - The method and apparatus of the low-temperature plasma synergistic catalytic purification indoor volatile organic compounds of secondary pollution is exempted from a kind of high efficiency low energy consumption - Google Patents
The method and apparatus of the low-temperature plasma synergistic catalytic purification indoor volatile organic compounds of secondary pollution is exempted from a kind of high efficiency low energy consumption Download PDFInfo
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Abstract
Exempt from the method and apparatus of the low-temperature plasma synergistic catalytic purification indoor volatile organic compounds of secondary pollution the invention discloses a kind of high efficiency low energy consumption, belong to Techniques for Indoor Air Purification field.The present invention starts the volatile organic matter in separating room air in the period of ventilation cleaning with normal wind speed long-time efficient absorption using the difunctional scavenging material component of absorption/catalysis being located in air main in building；Within the period that building does not start ventilation cleaning, the difunctional scavenging material component of absorption/catalysis is cycled through in the short time under low wind speed condition by low temperature plasma, make ADSORPTION STATE organic matter complete oxidation for harmless or low harmful material；Recyclegas ozoniferous continues to loop through the difunctional scavenging material component of absorption/catalysis after closing low-temperature plasma generator, ozone is thoroughly decomposed.The indoor volatile organic compounds transformation efficiency of method provided by the invention is high, and energy consumption is low, avoids secondary pollution and is discharged into room air.
Description
Technical field
The present invention relates to Techniques for Indoor Air Purification field, exempt from the low temperature of secondary pollution more particularly to a kind of high efficiency low energy consumption
The method and apparatus of plasma body cooperative catalytic purification indoor volatile organic compounds.
Background technology
There is low concentration volatile organic matter (abbreviation VOCs) in interior, be one of principal element for deteriorating IAQ.Wave
Hair property organic matter is very harmful to human body and environment, and most of volatile organic matters not only produce to respiratory tract, eye, nose of people etc.
Raw stimulation, also causes different degrees of infringement to organs such as nervous system, hemopoietic system, liver and kidneys.Room air volatilizees
Property organic matter can by room temperature adsorb and other can at ambient temperature decomposing organic matter method purify.Room temperature absorption is current
The technology the most ripe to low concentration volatile organic matter application in room air, but be only by gas the problem of absorption method is present
Organic matter in phase is transferred to solid-phase adsorbent surface, does not purify thoroughly, and adsorbent adsorption capacity is limited, long-term to ensure
Stable operation is, it is necessary to regularly replace adsorbent or make adsorbent reactivation.In addition, the conventional easy moisture absorption of acticarbon, it is necessary to
The relative humidity of strict control air.Voloxidation organic matter under relevant room temperature condition, existing many reports.Although room temperature is urged
Change oxidation of formaldehyde and have been enter into the application stage, but still can be using Efficient Conversion benzene homologues as carbon dioxide and water without a kind of technology.It is right
In most of volatile organic matters, generally existing efficiency is low and can not degradable the problems such as being harmless object.
Low-temperature plasma synergistic catalysis technique is that catalyst is introduced in low-temperature plasma system, utilizes low temperature plasma
Synergy between catalyst, purifying organic.It acts synergistically can be in the active particle in low temperature plasma
Volatile organic matter is converted into harmless object under catalytic action.The Chinese patent of Application No. 201110082007.9 discloses one
VOCs reactor is administered in the collaboration of kind of plasma-catalytic, and the patent uses dielectric barrier discharge mode, using quartz glass tube as
Cylinder, external electrode of the outer wall coated metal conductive material as dielectric barrier discharge, it is medium that cylinder centre, which sets stainless steel tube,
The interior electrode of barrier discharge, adsorbent and catalyst are filled between discharge air-gap between stainless steel tube and glass tube, is realized low
VOCs high-efficient purification in concentration industrial waste gas.The Chinese patent of Application No. 201410674694.7 discloses a kind of low temperature etc.
Gas ions multiple treating system, the processing system include preprocessor, anion purifier, double medium plasma processors, height
Can ion processing device and composite catalyzing device, closed air chamber is respectively equipped with the processor and catalytic unit, between air chamber
It is sequentially communicated, composite catalyst can decompose adsoption catalysis and decompose remaining ozone.It is continuous discharge straight-through structure above,
The high energy active particle catalysis oxidation organic matter in low temperature plasma can be utilized, but this connected mode handles low concentration
Low temperature plasma continuous operation energy consumption height during volatile organic matter be present, gas is big by gas-flow resistance during these components, even
The ozone amount of continuous electric discharge release is big, and air-flow directly causes secondary dirt by the organic matter and ozone release that make the non-complete oxidation in part
The problems such as dye.
To reduce low temperature plasma energy consumption, many scholars are also in research intermittent discharge formula low-temperature plasma synergistic purification
VOCs.Kim Hyu-Ha et al. (Kim H.H., Tsubota S., Date ' M., et al.Catalyst regeneration
and activity enhancement of Au/TiO2by atmospheric pressure nonthermal
plasma.Applied Catalysis A:General,2007,329:93-98.) " adsorption-low temperature plasma is proposed first
Catalytic regeneration technology ", using the adsorbent with good dispersiveness and catalytic performance, VOCs is adsorbed first, Ran Houli
With low temperature plasma regenerated catalyst.
Wengzheng Wang et al. (Wenzheng Wang, Honglei Wang, Tianle Zhu, et al.Removal of
gas phase low-concentration toluene over Mn,Ag and Ce modified HZSM-
5catalysts by periodical operation of adsorption and non-thermal plasma
regeneration.Journal of Hazardous Materials,2015,292:70-78.) utilize and load Mn, Ag
HZSM-5 catalyst carries out batchwise adsorption storage-plasma in-situ regeneration absorption/catalyst to toluene, finds load Mn's
Catalyst has the performance of good catalysis toluene and ozone decomposed, and Ag addition can improve the activity of catalyst.Xing
Fan et al. (Xing Fan, Tianle Zhu, Yifei Sun, et al.The roles of various plasma
species in the plasma and plasma-catalytic removal of low-concentration
formaldehyde in air.Journal of Hazardous Materials,2011,196:380–385；X.Fan,
T.L.Zhu,M.Y.Wang,et al.Removal of low-concentration BTX in air using a
combined plasma catalysis system.Chemosphere,2009 75:1301-1306.) it have studied low temperature etc.
Gas ions cooperate with MnOx/Al2O3Low concentration formaldehyde and benzene homologues in catalytic degradation air, find MnOx/Al2O3Catalyst draws
Enter to significantly improve the conversion ratio of formaldehyde and benzene, ozone can also be catalytically decomposed in MnOx, and reaction system exit is discharged smelly
Oxygen concentration is far below national standard.Kim Hyun-Ha et al. (Hyun-Ha Kim, Yoshiyuki Teramoto, Atsushi
Ogata.Time-resolved imaging of positive pulsed corona-induced surface
streamers on TiO2andγ-Al2O3-supported Ag catalysts.Journal of Physics D:
Applied Physics,2016,49:415204) it have studied plasma combination TiO2, 4%Ag/TiO2, 5%Ag/ γ-
A12O3With the process of 5%Ag/MS-13X catalyst removal benzene, research finds that Ag catalyst serves storage and discharges oxygen species
Effect, and 5%Ag/ γ-Al2O3With optimal activity.Roland U. et al. (U.Rolanda, F.Holzera, A.et al.Combination of non-thermal plasma and heterogeneous catalysis
for oxidation of volatile organic compounds Part 3.Electron paramagnetic
resonance(EPR)studies of plasma-treated porous alumina.Applied Catalysis B:
Environmental,2005,58:227-234.) research shows γ-Al after Low Temperature Plasma Treating2O3Catalyst surface produces
The A-O-O* super oxygen groups with strong oxidizing property, long-life (existence time is up to 14 days) have been given birth to, have contributed to the oxidation of benzene homologues
Degraded.Loaded Ag and MnOx Ag-MnOx/Al simultaneously2O3Catalyst is that a kind of good absorption/catalytic decomposition volatility is organic
The bifunctional catalyst of thing and ozone.
Above-mentioned batchwise adsorption storage-plasma in-situ regeneration system all uses through type system, i.e. low temperature plasma is sent out
The raw and difunctional scavenging material of absorption/catalysis is all laid in main air duct.The difunctional scavenging material of absorption/catalysis first will be low dense
The volatile organic matter of degree carries out adsorption and enrichment and stored, then using Low Temperature Plasma Treating, in very short electric discharge
It is interior to be fully cleaned up the organic matter of ADSORPTION STATE.But this purification style still has when gas passes through component that resistance is big, and not
Depleted ozone and the organic matter of non-complete oxidation are discharged into air, cause secondary pollution problems.
The content of the invention
Energy consumption be present in the prior art, during through type low-temperature plasma synergistic catalytic purification volatile organic matter in the present invention
The problems such as high, ozone discharges, vapour lock is big, there is provided the low-temperature plasma synergistic that secondary pollution is exempted from a kind of high efficiency low energy consumption is urged
Change the method and apparatus of purification indoor volatile organic compounds.
The low-temperature plasma synergistic catalytic purification indoor volatile organic compounds of secondary pollution are exempted from described high efficiency low energy consumption
Method, comprise the following steps：
The first step, within the period that building starts ventilation cleaning, room air, by main air duct, utilizes setting with normal wind speed
Volatile organic matter in the difunctional scavenging material component efficient absorption room air of absorption/catalysis of main air duct.
Described normal wind speed refers to wind speed 1m/s~3m/s.
Second step, within the period that building does not start ventilation cleaning, room air does not enter ventilation main air duct, using being arranged on
The blower fan certain driving air-flow of bypass cycles through the difunctional scavenging material component of absorption/catalysis, and opens low temperature plasma
Device, using low temperature plasma ozoniferous caused by electrion, pass through under low wind speed condition with circulating current described
The difunctional scavenging material component of absorption/catalysis, the organic matter of concerted catalysis oxidation-adsorption state, organic matter complete oxidation is decomposed into
Harmless or low harmful material, and it is regenerated the adsorptivity of the difunctional scavenging material component of absorption/catalysis.
Described low wind speed refers to that wind speed is 0.05~0.2m/s, and circulation time is 0.5~2h.
Described low-temperature plasma generator is not arranged in main air duct using bypass set-up mode, can be avoided main wind
Road gas-flow resistance, and only in oxidation regeneration, electrion produces low temperature plasma to described low-temperature plasma generator,
Therefore electric discharge energy consumption can be reduced.
3rd step, after organic matter complete oxidation, low-temperature plasma generator is closed, stop electric discharge, bypass gas continues with low
Wind speed cycles through the described difunctional scavenging material component of absorption/catalysis, realizes the thorough decomposition to ozone, avoids ozone
It is discharged into room air and causes secondary pollution.
Described low wind speed refers to that wind speed is 0.05~0.2m/s, and circulation time is 0.1~0.2h.
Using method provided by the invention, absorption and the oxidation of low temperature plasma fortifying catalytic at room temperature alternately, can meet
The purification requirement of room air containing low concentration volatile organic matter.
The present invention, which is also provided in the low-temperature plasma synergistic catalytic purification room that secondary pollution is exempted from a kind of high efficiency low energy consumption, volatilizees
The device of property organic matter, described device include air main and the difunctional scavenging material component of absorption/catalysis, and the one of the air main
It is air outlet to hold as air inlet, the other end.Room air enters air main from air inlet, by absorption/catalysis in air main
Difunctional scavenging material component, the low concentration volatile organic matter in room air is subjected to Gas Phase Adsorption separation, cleaned air
Discharged from air main air outlet, come back to interior.Described device also includes a bypass, and described bypass is including low temperature etc.
Plasma generator, stop valve and blower fan, it is sequentially connected by bypassing airduct, the circulating current on the bypass airduct leads to successively
Low-temperature plasma generator, absorption/catalysis difunctional scavenging material component, stop valve and blower fan are crossed, wherein, low-temperature plasma
The gas outlet of body generator as far as possible can be close to the difunctional scavenging material component of absorption/catalysis.
The advantage of the invention is that：
1. indoor volatile organic compounds transformation efficiency is high.
The present invention starts ventilation only by using the difunctional scavenging material component of absorption/catalysis in air main in building
The volatility separated in the period of change with normal wind speed (wind speed 1m/s~3m/s) long-time efficient absorption in room air is organic
Thing；Within the period that building does not start ventilation cleaning, by low temperature plasma in low wind speed (0.05~0.2m/s) condition
The difunctional scavenging material component of absorption/catalysis is cycled through in the lower short time, make ADSORPTION STATE organic matter complete oxidation to be harmless or
Low harmful material.
2. energy consumption is low.
Low-temperature plasma generator using bypass set-up mode, that is, is not arranged in air main, avoided to master by the present invention
Air-flow produces resistance in airduct, reduces fan energy consumption in air main；When low-temperature plasma generator discharges bypass simultaneously in
Between it is short, save electric energy；It is small to bypass the wind speed of recyclegas in airduct, low wind speed can reduce fan energy consumption in bypass.
3. avoid secondary pollution.
Low temperature plasma cycles through the difunctional scavenging material component of absorption/catalysis under low wind speed condition, and organic matter is complete
Total oxygen turns to harmless or low harmful material；After stopping electric discharge, continue to follow at low wind speeds containing the gas for not consuming complete ozone
Ring is made ozone be completely decomposed into oxygen, is avoided secondary pollution and be discharged into by the difunctional scavenging material component of absorption/catalysis
In room air.
Brief description of the drawings
Fig. 1 exempts from volatility in the low-temperature plasma synergistic catalytic purification room of secondary pollution for a kind of high efficiency low energy consumption of the present invention
The schematic diagram of the device absorption VOCs processes of organic matter.
Fig. 2 exempts from volatility in the low-temperature plasma synergistic catalytic purification room of secondary pollution for a kind of high efficiency low energy consumption of the present invention
The device of organic matter is in low temperature plasma oxidation degraded VOCs and the schematic diagram of ozone decomposition process.
In figure：
1. air main；2. the difunctional scavenging material component of absorption/catalysis；3. low-temperature plasma generator；4. blower fan；5. cut-off
Valve；6. bypass airduct.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
Present invention firstly provides the low-temperature plasma synergistic catalytic purification that secondary pollution release is exempted from a kind of high efficiency low energy consumption
The device of indoor volatile organic compounds, as shown in figure 1, described device includes air main 1 and the difunctional scavenging material of absorption/catalysis
Component 2, one end of the air main is air inlet, and room air enters air main 1 from air inlet, by the suction in air main 1
Attached/difunctional scavenging material component 2 of catalysis, the low concentration volatile organic matter in room air is adsorbed, cleaned air
Discharged at the air outlet of air main 1, come back to interior.In order to the described difunctional scavenging material component 2 of absorption/catalysis
The regeneration of absorption property, bypass is included on device of the present invention, as shown in Fig. 2 described bypass includes low-temperature plasma
Body generator 3, blower fan 4 and stop valve 5, connected by bypassing airduct 6 between three.Circulating current on the bypass airduct 6
Pass sequentially through low-temperature plasma generator 3, the difunctional scavenging material component 2 of absorption/catalysis, stop valve 5 and blower fan 4.Wherein,
The gas outlet of low-temperature plasma generator 3 as far as possible can be close to the difunctional scavenging material component 2 of absorption/catalysis.
Wherein, the difunctional scavenging material of absorption/catalysis is 1%Ag-5%Mn/ γ-Al2O3, 1%Ag-3%Mn/ZSM-5
Or 3%Ce-5%Mn/ZSM-5 materials.To reduce vapour lock, it is prepared into cellular.This, which adsorbs/be catalyzed difunctional scavenging material, has
Catalysis oxidation VOCs effect under efficient absorption and low temperature plasma existence condition, and the effect of catalytic decomposition ozone.
The electrode configuration of the low-temperature plasma generator 3 is line-cartridge type, line-board-like or pin-orifice-plate type, is usually assembled into
One entirety, corona discharge cleaning module is formed, wherein, wire or needle-shaped discharging electrode connect the high-pressure side of power supply, plate, cylinder or hole
Plate is earthing pole.
The power supply of above-mentioned corona discharge cleaning module power supply is any one in positive polarity dc source and negative polarity power supply, electric
Pressure scope is 0kV to 10kV.
The present invention, which is also provided in the low-temperature plasma synergistic catalytic purification room that secondary pollution is exempted from a kind of high efficiency low energy consumption, volatilizees
The method of property organic matter, it is as follows that it includes step：
Start in building in the ventilation cleaning period, low-temperature plasma generator 3, blower fan 4, stop valve 5, which are in, closes
State, as shown in figure 1, under normal wind speed (1m/s~3m/s), room air enters air main 1 and passes through the double work(of absorption/catalysis
Energy scavenging material component 2, volatile organic matter efficiently, in long-time adsorbing separation room air is realized, it is clean after purification
Air outlet of the air through air main 1 is directly discharged to interior.Do not start in the ventilation cleaning period in building, blower fan in air main
It is closed, room air does not enter in air main 1, opens low-temperature plasma generator 3, blower fan 4, stop valve 5, such as
Shown in Fig. 2, downstream is driven to pass sequentially through stop valve 5, blower fan 4, low temperature etc. under low wind speed (0.05~0.2m/s) in blower fan 4
Plasma generator 3 and the difunctional scavenging material component 2 of absorption/catalysis for having adsorbed volatile organic matter, circulate 0.5~2h
Afterwards, close low-temperature plasma generator 3, make bypass gas continue under low wind speed (0.05~0.2m/s) circulation 0.1~
0.2h, not depleted ozone is oxygen by the difunctional scavenging material component 2 of absorption/catalysis catalytic decomposition completely in bypass gas
Air outlet through air main 1 after gas is discharged into room air.
Embodiment 1
The size of air purifier in certain office is outside 320mm × 250mm rectangular air duct, bypass connection low temperature etc. from
Daughter generator 3, blower fan 4 and stop valve 5, the circular lucite tube or stainless steel tube for being 50mm with internal diameter connect.Low temperature etc.
Plasma generator 3 designs bunchiness tooth trace-tubular, and uses 8 cylinder parallel connections.String tooth trace is discharge electrode, and cylinder is earthing pole,
Between apply 8kV negative polarity d. c high voltage power supplies.String tooth trace discharge electrode is that internal diameter is that the equidistant of 3mm has concatenated several electric discharges
The stainless steel bar of gear, each uniform 4 discharge tips of gear, electric discharge gear spacing is 10mm；Ground connection extremely tubular stainless steel
Pipe, internal diameter 22mm, thickness 1mm, length of steel pipe 300mm.By 1%Ag~5%Mn/ γ-Al2O3Absorption/catalysis is difunctional
The cellular rectangular module 2 that scavenging material is prepared into 300mm × 200mm × 50mm is arranged in air purifier, normal sorption
Shi Fengliang is 500m3/ h, processing benzene in air concentration is 1.3mg/m3, air purifier is closed after adsorbing 15h.Opened in bypass
Low-temperature plasma generator 3, blower fan 4 and stop valve 5, recyclegas pass through the described difunctional scavenging material of absorption/catalysis
Component 2, low temperature plasma caused by low-temperature plasma generator 3 on the difunctional scavenging material component 2 of absorption/catalysis to inhaling
Attached organic matter carries out oxidative degradation, realizes the regeneration of the difunctional absorption property of scavenging material component 2 of absorption/catalysis, circulated air
Measure as 25m3Closed after/h, low-temperature plasma generator 3 discharge time 2h.Recyclegas ozoniferous continues cycling through 0.2h,
Realize the complete decomposition of ozone.Testing result shows, benzene is not detected at air purifier air outlet after normal sorption 15h；Low temperature
After plasma flow circular treatment 2h CO is only detected in bypass circuit air-flow2, it is not detected by CO and organic matter, ozone concentration
For 1.8mg/m3；After bypass gas flow continues cycling through 0.2h after stopping electric discharge, ozone is not detected at air outlet.
B applies example 2
The size of air purifier in office is that connection low-temperature plasma is bypassed outside 250mm × 250mm rectangular air duct
Body generator 3, blower fan 4 and stop valve 5, the circular lucite tube or stainless steel tube for being 50mm with internal diameter connect.Low temperature etc. from
Daughter generator 3 is designed to pin-orifice-plate type, and to adhere to a plurality of needles shape conductor on a metal plate as discharge electrode, with holes is stainless
Steel plate punches in lucite tube as earthing pole and picks out conducting terminal for connecting the both positive and negative polarity of high voltage power supply, Zhi Jianshi
Add 6kV positive polarity DC high-voltage power supplies.Needle type radius is 0.5mm, and pin pin spacing is 5mm, and needle plate spacing is 5mm.By 3%Ce~
5%Mn/ZSM-5, which adsorbs/is catalyzed difunctional scavenging material and is prepared into 230mm × 200mm × 50mm cellular rectangular module 2, to be pacified
In air purifier, air quantity is 490m during normal sorption3/ h, processing air formaldehyde concentration are 1.0mg/m3, adsorb 15h
After close air purifier.Low-temperature plasma generator 3, blower fan 4 and stop valve 5, recyclegas are opened in bypass and passes through institute
The difunctional scavenging material component 2 of absorption/catalysis stated, low temperature plasma caused by low-temperature plasma generator 3 to absorption/
It is catalyzed the organic matter adsorbed on difunctional scavenging material component 2 and carries out oxidative degradation, realizes the difunctional scavenging material of absorption/catalysis
The regeneration of the absorption property of component 2, air circulation 33m3Closed after/h, low-temperature plasma generator 3 discharge time 1.5h.Contain
The recyclegas of ozone continues cycling through 0.15h, realizes the thorough decomposition of ozone.Testing result shows, air is net during normal sorption
Change and do not detect formaldehyde at device air outlet；Only detected in bypass circuit air-flow after low temperature plasma airflow circulating processing 1.5h
CO2, it is not detected by CO and organic matter, ozone concentration 8.5mg/m3；After bypass gas flow continues cycling through 0.15h after stopping electric discharge, go out
Ozone is not detected at air port.
Embodiment 3
The size of air purifier in certain student classroom is that connection low temperature etc. is bypassed outside 320mm × 200mm rectangular air duct
Plasma generator 3, blower fan 4 and stop valve 5, the circular lucite tube or stainless steel tube for being 50mm with internal diameter connect.Low temperature
Plasma generator 3 is designed to line-board-like, using lucite rectangular tube as shell of reactor, with more a diameter of 0.5mm's
Nichrome wire is discharge electrode, using stainless steel plate as earthing pole, is punched in lucite tube and picks out conducting terminal for connecting
The both positive and negative polarity of high voltage power supply, between apply 8kV negative polarity d. c high voltage power supplies.By 1%Ag~3%Mn/ZSM-5 absorption/catalysis
The cellular rectangular module 2 that difunctional scavenging material is prepared into 290mm × 170mm × 50mm is arranged in air purifier, just
Often air quantity is 180m during absorption3/ h, it is 1.5mg/m to handle toluene concentration in air3, air purifier is closed after adsorbing 15h.It is other
Low-temperature plasma generator 3, blower fan 4 and stop valve 5 are opened in road, it is difunctional that recyclegas passes through described absorption/catalysis
Scavenging material component 2, low temperature plasma caused by low-temperature plasma generator 3 is to the difunctional scavenging material of absorption/catalysis
The organic matter adsorbed on component 2 carries out oxidative degradation, realizes the difunctional absorption property of scavenging material component 2 of absorption/catalysis again
It is raw, air circulation 9m3Closed after/h, low-temperature plasma generator 3 discharge time 1h.Recyclegas ozoniferous continues to follow
Ring 0.1h, realize the thorough decomposition of ozone.Testing result shows, does not detect first at air purifier air outlet during normal sorption
Benzene；After low temperature plasma airflow circulating processing 1h CO is only detected in bypass circuit air-flow2, CO and organic matter are not detected by,
Ozone concentration is 4.3mg/m3；After bypass gas flow continues cycling through 0.1h after stopping electric discharge, ozone is not detected at air outlet.
Claims (7)
1. the low-temperature plasma synergistic catalytic purification indoor volatile organic compounds of secondary pollution are exempted from a kind of high efficiency low energy consumption
Method, it is characterised in that：
The first step, start the period of ventilation cleaning in building, room air with normal wind speed by main air duct, using being arranged on
Volatile organic matter in the difunctional scavenging material component efficient absorption room air of absorption/catalysis of main air duct；
Second step, the period of ventilation cleaning is not started in building, room air does not enter ventilation main air duct, using being arranged on side
The blower fan certain driving air-flow on road cycles through the difunctional scavenging material component of absorption/catalysis, and opens low-temperature plasma generator,
Using low temperature plasma ozoniferous caused by electrion under low wind speed condition with circulating current by described absorption/
Difunctional scavenging material component is catalyzed, the organic matter of concerted catalysis oxidation-adsorption state, is harmless or low by organic matter complete oxidation
Evil material, and it is regenerated the absorption property of the difunctional scavenging material component of absorption/catalysis；
Described low-temperature plasma generator is not arranged in main air duct using bypass set-up mode；
3rd step, after organic matter complete oxidation, low-temperature plasma generator is closed, stop electric discharge, bypass gas continues with low
Wind speed cycles through the described difunctional scavenging material component of absorption/catalysis, realizes the thorough decomposition to residue ozone, avoids
Ozone is discharged into room air and causes secondary pollution.
2. according to the method for claim 1, it is characterised in that：Normal wind speed described in the first step refers to that wind speed is 1m/s
~3m/s.
3. according to the method for claim 1, it is characterised in that：Low wind speed described in second step refer to wind speed for 0.05~
0.2m/s, circulation time are 0.5~2h.
4. according to the method for claim 1, it is characterised in that：Low wind speed described in 3rd step refer to wind speed for 0.05~
0.2m/s, circulation time are 0.1~0.2h.
5. according to the method for claim 1, it is characterised in that absorption described in the first step, second step and the 3rd step/urge
It is 1%Ag-5%Mn/ γ-Al to change difunctional scavenging material2O3, 1%Ag-3%Mn/ZSM-5 or 3%Ce-5%Mn/ZSM-5 materials
Material；To reduce vapour lock, it is prepared into cellular.This, which adsorbs/be catalyzed difunctional scavenging material component, has efficient absorption and low temperature etc.
Catalysis oxidation VOCs effect under gas ions existence condition, and the effect of catalytic decomposition ozone.
6. the low-temperature plasma synergistic catalytic purification indoor volatile organic compounds of secondary pollution are exempted from a kind of high efficiency low energy consumption
Device, described device include air main and the difunctional scavenging material component of absorption/catalysis, and one end of the air main is air intake
Mouthful, the other end is air outlet, and indoor air to be clean enters air main from air inlet, by the absorption in air main/catalysis work(
Can scavenging material component, the low concentration volatile organic matter in room air is subjected to Gas Phase Adsorption separation, cleaned air is from master
Airduct air outlet is discharged, and comes back to interior；It is characterized in that：
Described device also includes a bypass, and described bypass includes low-temperature plasma generator, blower fan and stop valve, leads to
Cross bypass airduct to be sequentially connected, the circulating current on the bypass airduct passes sequentially through low-temperature plasma generator, adsorbs/urge
Change difunctional scavenging material component, stop valve and blower fan, wherein, the gas outlet of low-temperature plasma generator is as close to suction
Attached/difunctional scavenging material component of catalysis.
7. device according to claim 6, it is characterised in that：The electrode configuration of the low-temperature plasma generator is
Line-cartridge type, line-board-like or pin-orifice-plate type, are assembled into one and are monolithically fabricated corona discharge module, wherein, wire or needle-like electric discharge
Pole connects the high-pressure side of power supply, and plate, cylinder or orifice plate are earthing pole；The power supply of above-mentioned corona discharge module for power supply is positive polarity direct current
Any one in power supply and negative polarity power supply, voltage range is 0kV to 10kV.
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