CN103785276B - The synergy of low temperature plasma and catalyst is utilized to purify the method and apparatus of kitchen fumes - Google Patents

The synergy of low temperature plasma and catalyst is utilized to purify the method and apparatus of kitchen fumes Download PDF

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CN103785276B
CN103785276B CN201410035155.9A CN201410035155A CN103785276B CN 103785276 B CN103785276 B CN 103785276B CN 201410035155 A CN201410035155 A CN 201410035155A CN 103785276 B CN103785276 B CN 103785276B
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low temperature
temperature plasma
discharge electrode
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catalyst
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CN103785276A (en
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朱天乐
丁雳
纳宏波
孙也
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Beihang University
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Abstract

The present invention discloses a kind of method and apparatus utilizing the synergy of low temperature plasma and catalyst to purify kitchen fumes contained particulate matters and VOC.The method allows oil smoke successively by reaction of low temperature plasma district and catalytic reaction zone, and VOC contained by oil smoke is partially oxidized in reaction of low temperature plasma district, and oxidized further in catalytic reaction zone.At the leading portion in reaction of low temperature plasma district, the positive-negative polarity electrion alternately arranged makes oil smoke contained particulate matters be separated removal or charged; At the changeover portion in reaction of low temperature plasma district, the close to each other and Caragana seed pests of positively charged and particle that is negative electrical charge; Back segment particle in reaction of low temperature plasma district continues Caragana seed pests and to be captured separation.Invention increases high-efficient purification VOC function; The efficiency removing oil smoke contained particulate matters is higher; Normal temperature can be realized run, resist the ability that stains strong, be specially adapted to the kitchen fumes process of the public places such as all kinds of dining room, hotel and hotel.

Description

The synergy of low temperature plasma and catalyst is utilized to purify the method and apparatus of kitchen fumes
Technical field
The present invention relates to a kind of kitchen fumes purification method and device, belong to environmental protection technical field.More particularly, relate to a kind of synergy utilizing low temperature plasma and catalyst, both removed kitchen fumes contained particulate matters, remove VOC contained by kitchen fumes again, and prevent the method and apparatus of ozone secondary pollution.
Background technology
Chinese cooking mode is to fry, to explode, to decoct, to cook, a large amount of oil smoke is produced in cooking process, its composition comprises the flue gas of grease, thermal oxide and thermal cracking products and fuel combustion generation, pollutant comprises fine particle and gaseous state VOC, and has easy condensation, special nature that adhesion is strong.Its Drainage feature is the many and dispersion of quantity, single-point discharge capacity is little but height of release is low.Along with the development of Chinese national economy and the raising of people's living standard, catering trade scale and quantity are rapidly developed, to city PM 2. 5contribution also constantly increase, become and be only second to industry and the third-largest Surveying of Urban Air Pollution Sources of traffic.
In order to solve the environment and social concern that kitchen fumes brings, national environmental protection " 12 " planning explicitly points out, and strengthen kitchen fumes Environmental capacity." surrounding air fine particle pollution prevention technique policy " that Chinese Ministry of Environmental Protection announces also proposes, by controlling cooking fume, barbecue and cooking stove smog pollution, to reduce PM 2. 5discharge.State Council and Beijing have issued prevention and control of air pollution action plan all, and one of its task is exactly strengthen kitchen fumes Environmental capacity.Require that fume purifying facility must be installed in catering service management place.Meanwhile, impose kitchen fumes charges for disposing pollutants and also mention agenda.
In fact, China's kitchen fumes purification techniques eighties in last century and equipment start rudiment.Before and after 2000, manufacturing enterprise develops rapidly and begins to take shape.But, existing cleaning equipment is mainly for oil smoke contained particulate matters, and the purification method adopted comprises electrostatic separation, mechanical filter, honeycomb oil-collecting, liquid scrubbing and complex method thereof etc.Up to the present, the minimizing technology that much prior art discloses for oil smoke contained particulate matters is also had.But prior art only can solve oil smoke contained particulate matters on the one hand, and purification efficiency is not limit.On the other hand, there is not yet not only high-efficient purification oil smoke contained particulate matters but also the report of high-efficient purification VOC.In fact, the VOC of catering trade discharge is not only directly detrimental to health, and is also the precursor substance of photochemical fog, secondary fine particle and greenhouse effects, must be paid attention to.
Summary of the invention
The present invention is on the basis analyzing kitchen fumes pollutant type and feature, propose a kind of suitable with multiple pollutant (comprising stickiness particle, VOC and moisture) contained by oil smoke, can multiple pollutant contained by purifying oil fume, and prevent the method and apparatus of secondary pollution, so that suitable following more and more stricter kitchen fumes discharge standard.Under investment and the relatively low prerequisite of operating cost, realize the comprehensive decontamination of flue gas.
The method utilizing the synergy of low temperature plasma and catalyst to purify kitchen fumes pollutant provided by the invention is realized by following scheme: oil smoke is first by the leading portion in reaction of low temperature plasma district, partial particulate contained by oil smoke is charged, directed movement to utilize the positive-negative polarity electrion of interlaced arrangement to make, and is deposited on the first earthing pole or the first discharge electrode and the second discharge electrode; Partial particulate is positive charge or negative electrical charge but do not deposit on the first earthing pole or the first discharge electrode and the second discharge electrode on lotus only.The oil smoke that leading portion from reaction of low temperature plasma district is discharged enters interlude, the close to each other and Caragana seed pests of particle positively charged with electronegative in this region.Then, oil smoke enters the back segment in reaction of low temperature plasma district, in this region, and particle charged, the directed movement again of Caragana seed pests, and be deposited on the second earthing pole or the 3rd discharge electrode.Meanwhile, VOC contained by the strong oxidizing property species meeting partial oxidation oil smoke of reaction of low temperature plasma district electrion generation.Described reaction of low temperature plasma district adopts flat board, cylinder honeycomb ceramics or polygon honeycomb ceramics as the first earthing pole or the second earthing pole; Jaggies, aciculiform line, astroid, prickle wire or serial connection gear line are as the first discharge electrode or the second discharge electrode or the 3rd discharge electrode.The electric power polarity that two kinds of discharge electrodes (the first discharge electrode and the second discharge electrode) of the leading portion interlaced arrangement in reaction of low temperature plasma district apply is contrary; Be connected to after one of back segment the 3rd discharge electrode and leading portion two discharge electrodes (the first discharge electrode and the second discharge electrode) are in parallel in same high voltage source (the first high voltage source or the second high voltage source).Described high voltage source power supply mode comprises high direct voltage, DC stacked high-frequency ac or DC stacked high frequency arteries and veins.Wherein positive direct-current voltages is 6kV to 15kV, and negative dc voltage is 6kV to 18kV.
The oil smoke flowing out reaction of low temperature plasma district back segment enters catalytic reaction zone, at catalyst surface, by the O that reaction of low temperature plasma district electrion produces 3with other oxidisability particle, can be oxidized volatile organic thing contained by oil smoke (being included in the VOC of plasma reaction district partial oxidation) is at ambient temperature carbon dioxide and water.Described catalyst composition not only meets the technology needs of catalytic oxidation organic compound, and meeting easy, economically catalyst to be carried out to thermal regeneration technical need, the heating means that the thermal regeneration of described catalyst adopts comprise electrical heating, heating using microwave or infrared heating.Based on such object and application demand, catalyst adopts the preparation of dipping, sol-gel or coprecipitation method, and carrier material is Al 2o 3or TiO 2; Doped SIC, ZrO 2, CeO 2, SiO 2or La 2o 3in one or more as co-catalyst, doping is 10wt.% to 20wt.%; Active component is one or more in Mn oxide, Cu oxide, Fe oxide, Co oxide and Ni oxide, and activity component load quantity (accounting for catalyst quality ratio by metallic element) is 2% to 8%.In order to reduce vapour lock, catalyst need be prepared into cellular.
It should be noted that, realize in reaction of low temperature plasma district oil smoke contained particulate matters 100% remove and organic compound complete oxidation be all uneconomic.Therefore, on the one hand, under room temperature condition, the mineralising (being namely oxidized to final state product carbon dioxide and water) of organic compound mainly occurs in catalytic reaction zone.On the other hand, minute quantity fine particle can enter catalytic reaction zone, and a part is wherein deposited on catalyst surface again, thus deteriorated catalyst performance.In order to prevent the particle being deposited on catalyst surface from causing catalyst activity serious deterioration, need to carry out regeneration process to catalyst, concrete grammar comprises microwave heating regeneration, infrared heating regeneration and electrical heating regeneration in good time.
Compared with traditional method, the synergy of low temperature plasma and catalyst that utilizes that the present invention proposes purifies the method and apparatus of kitchen fumes, has following beneficial effect:
1. both remove oil smoke contained particulate matters, remove VOC contained by oil smoke again;
Traditional electrostatic separation, mechanical filter, honeycomb oil-collecting, liquid scrubbing and complex method thereof remove oil smoke contained particulate matters for target to be separated, do not possess the function of VOC contained by purifying oil fume, even if or having certain effect, purification efficiency is also very low.Following kitchen fumes emission control is inevitable both comprised particle, comprised VOC again.The present invention can purifying oil fume contained particulate matters, removes VOC contained by oil smoke again, thus can meet increasingly strict emission control requirement.
2. the efficiency of purifying oil fume particle is higher;
Traditional electrostatic separation, mechanical filter, honeycomb oil-collecting, liquid scrubbing and complex method thereof, under investment and the rational prerequisite of operating cost, are difficult to the smoke particle thing isolation of purified efficiency reaching more than 95%.Following kitchen fumes emission control must propose higher granular material discharged control overflow.The present invention, by alternately arranging positive or negative high voltage electric discharge, increases fine particle Caragana seed pests function, can realize smoke particle thing removal efficiency and reach more than 95%, and therefore disposal cost can not increase.
3. save and take up an area, reduce investment and operating cost;
Conventional purge VOC method mainly comprises absorption, catalytic combustion and flame combustion etc.Wherein, absorption method adopts active carbon as adsorbent usually, because kitchen fumes contains stickiness aerosol particle, acticarbon can be caused to regenerate difficulty.Catalytic combustion and flame combustion need carry out under high-temperature, and kitchen fumes is interval generation, and frequent switch heating must bring the problem that energy consumption is high.Utilize the synergy of low temperature plasma and catalyst, purified treatment can be made to carry out at normal temperatures on the one hand, be only aided with short heat treatment when regenerated catalyst, thus heat energy consumption low.On the other hand, work in coordination with and utilize low temperature plasma gaseous oxidation VOC and the effect in catalyst surface oxidation of organic compounds kind, energy consumption can be reduced further.
4. catalytic decomposition ozone, can not form secondary pollution;
Traditional kitchen fumes electrostatic process not only can only remove oil smoke contained particulate matters, and can produce the ozone of high concentration, causes ozone pollution.Due to low-altitude discharged most after kitchen fumes gas purification, the adverse effect of this pollution is more remarkable.Utilize the cooperative effect of low temperature plasma and catalyst, be short-lived but the oxygenate kind that oxidisability is stronger by catalyst decomposes ozone, contained by the strong oxidizing property mineralising oil smoke that not only can utilize the latter, organic pollutants is carbon dioxide and water, and ozone can be avoided to arrange the secondary pollution of initiation outward.
Accompanying drawing explanation
Fig. 1 is kitchen fumes cleaning system structural representation provided by the invention;
Fig. 2 is the structural representation utilizing the synergy of low temperature plasma and catalyst to purify catering oil fume purifier in the present invention;
Fig. 3 A ~ 3E is the discharge electrode structural representation in the present invention, is respectively serial connection gear discharge lines, astroid, prickle discharge lines, needle-like discharge lines and sawtooth discharge lines;
Fig. 4 A and Fig. 4 B is the earthing pole structural representation in the present invention, is respectively cylinder honeycomb ceramics and polygon honeycomb ceramics.
In figure:
1. range hood; 2. bend pipe; 3. the first spark arrester; 4. clarifier preceding pipeline;
5. clarifier; 6. blower fan preceding pipeline; 7. the second spark arrester; 8. blower fan;
9. chimney; 501. insulator; 502 first high voltage sourcies; 503. second high voltage sourcies;
504. catalyst; 505. regeneration heating device; 506. first discharge electrodes; 507. first earthing poles;
508. second discharge electrodes; 509. changeover portion; 510. the 3rd discharge electrodes; 511. second earthing poles.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, the invention provides a kind of system utilizing the synergy of low temperature plasma and catalyst to purify kitchen fumes, described system comprises petticoat pipe 1, bend pipe 2, first spark arrester 3, clarifier preceding pipeline 4, clarifier 5, blower fan preceding pipeline 6, second spark arrester 7, blower fan 8 and chimney 9, each part mentioned above starts to connect in turn from the culinary cuisine kitchen range top, and is fixedly connected with between each parts and seals.Kitchen fumes traps by petticoat pipe 1, and by bend pipe 2, first spark arrester 3 and clarifier preceding pipeline 4, delivers to clarifier 5 entrance, deliver to blower fan 8 after purification by blower fan preceding pipeline 6, second spark arrester 7, emptying finally by chimney 9.The power of above-mentioned flue gas walking all comes from blower fan 8.
As shown in Figure 2, described clarifier 5 is monolithic construction, comprises the first high voltage source 502, second high voltage source 503, insulator 501, reaction of low temperature plasma district leading portion first discharge electrode 506, reaction of low temperature plasma district leading portion second discharge electrode 508, reaction of low temperature plasma district leading portion first earthing pole 507, interlude 509, reaction of low temperature plasma district back segment the 3rd discharge electrode 510, reaction of low temperature plasma district back segment second earthing pole 511, catalytic reaction zone catalyst 504 and catalytic reaction zone regeneration heating device 505.
Oil smoke from Fig. 2 left side enter clarifier 5 after, first, by the leading portion in reaction of low temperature plasma district, on the first discharge electrode 506 that the high-voltage connection of the first high voltage source 502 and the second high voltage source 503 is connected respectively to interlaced arrangement through insulator 501 and the second discharge electrode 508, under high voltage electric field effect, partial particulate contained by oil smoke is charged, directed movement, and is deposited on the first discharge electrode 506, second discharge electrode 508 or the first earthing pole 507; At reaction of low temperature plasma district leading portion, partial particulate only on lotus positive charge or negative electrical charge but do not deposit separate.The oil smoke that leading portion from reaction of low temperature plasma district is discharged enters interlude 509, the close to each other and Caragana seed pests of particle positively charged with electronegative in this region.Then, oil smoke enters the back segment in reaction of low temperature plasma district, in this region, and particle charged, the directed movement again of Caragana seed pests, and be deposited on the 3rd discharge electrode 510 or the second earthing pole 511.Meanwhile, the strong oxidizing property low-temperature plasma that reaction of low temperature plasma district electrion produces knows from experience VOC contained by partial oxidation oil smoke.
As shown in Fig. 3 A ~ 3E, the structure of the first described discharge electrode 506, second discharge electrode 508 and the 3rd discharge electrode 510 adopt in serial connection gear line, astroid, prickle wire, aciculiform line or jaggies one or more.First discharge electrode 506 of the leading portion interlaced arrangement in reaction of low temperature plasma district and the second discharge electrode 508 are connected respectively to the first high voltage source 502 or the second high voltage source 503; First discharge electrode 506 can be identical with the structure of the second discharge electrode 508, also can not be identical.Be connected in same high voltage source after 3rd discharge electrode 510 is in parallel with the second discharge electrode 508; 3rd discharge electrode 510 is identical with the second discharge electrode 508 structure be connected in parallel.
As shown in Figure 4 A and 4 B shown in FIG., ground connection very flat board, cylinder honeycomb ceramics or the polygon honeycomb ceramics in reaction of low temperature plasma district, reaction of low temperature plasma district leading portion first earthing pole 507 is identical with the structure of reaction of low temperature plasma district back segment second earthing pole 511.
Described first high voltage source 502 is contrary with the second high voltage source 503 polarity, and voltage waveform is high direct voltage, DC stacked high-frequency ac or DC stacked high-frequency impulse, and wherein, positive direct-current voltages is 6kV to 15kV, and negative dc voltage is 6kV to 18kV.
And then catalytic reaction zone is entered by the oil smoke in reaction of low temperature plasma district.Catalyst 504 surface in catalytic reaction zone, O 3the oxygenate kind that oxidisability is stronger can be decomposed into, to go forward side by side the organic species of non-complete oxidation contained by oxidation step oil smoke, comprise original VOC contained by oil smoke and by the organic product produced after low temperature plasma partial oxidation, make their mineralising be carbon dioxide and water.
Along with the prolongation of service time, catalyst 504 surface there will be by the phenomenon of pollution particles contained in food and drink flue gas.In order to ensure the activity of catalyst 504, when this phenomenon is obvious, (general range estimation is carried out judging; Also according to service condition, regularly can process), heating means be adopted to carry out regeneration process to catalyst 504.Now, can open regeneration heating device 505, while heatable catalyst 504, the organic matter sticked is catalyzed oxidation also, thus guarantees regeneration gas not containing organic compound.The mode of heating adopted comprises heating using microwave, infrared heating, heating wire or electrothermal tube heating.
embodiment 1:
Reaction of low temperature plasma district first discharge electrode 506, second discharge electrode 508 and the 3rd discharge electrode 510 are all adopted as zigzag, and the first discharge electrode 506 connects the first high voltage source 502, and be the DC high-voltage power supply of negative polarity, discharge voltage is-12kV; Second discharge electrode 508 is connected the second high voltage source 503 with the 3rd discharge electrode 510, and be the DC high-voltage power supply of positive polarity, discharge voltage is+11kV; First earthing pole 507 and the second earthing pole 511 are tabular.Catalyst carrier is TiO 2; Doped SIC and La 2o 3as co-catalyst, doping is respectively 8wt.% and 6wt.%(mass percentage); Active component is Mn oxide, and the mass percent that element manganese accounts for catalyst 504 is 5wt.%; Heating using microwave is adopted to realize catalyst regeneration.Utilize the catering oil fume purifier process university dining hall catering oil smoke based on this configuration, process tolerance is 12550m 3/ h.Testing result shows, to the removal efficiency of oil smoke contained particulate matters higher than 96.9%, VOC removal efficiency is higher than 80%.After process, fine particle concentration is lower than 0.93mg/m 3, VOC concentration is lower than 11.5mg/m 3, outlet ozone concentration is lower than 11.6mg/m 3.
embodiment 2:
Reaction of low temperature plasma district first discharge electrode 506 is needle point shape, and the first discharge electrode 506 connects the first high voltage source 502, and be the DC high-voltage power supply of positive polarity, discharge voltage is+6kV; Second discharge electrode 508 and the 3rd discharge electrode 510 are prickle shape, connect the second high voltage source 503, and be the DC high-voltage power supply of negative polarity, discharge voltage is-6kV; First earthing pole 507 and the second earthing pole 511 are tabular.Catalyst carrier is Al 2o 3; Doping ZrO 2and SiO 2as co-catalyst, doping is respectively 5wt.% and 5wt.%; Active component is Cu oxide, and the mass percent that copper accounts for catalyst 504 is 8wt.%; Adopt infrared heating to realize catalyst 504 to regenerate.Utilize the catering oil fume purifier process university dining hall catering oil smoke based on this configuration, process tolerance is 18510m 3/ h.Testing result shows, to the removal efficiency of oil smoke contained particulate matters higher than 98.1%, VOC removal efficiency is higher than 82%.After process, fine particle concentration is lower than 1.02mg/m 3, VOC concentration is lower than 9.4mg/m 3, outlet ozone concentration is lower than 9.4mg/m 3.
embodiment 3:
Reaction of low temperature plasma district first discharge electrode 506 is star, and the first discharge electrode 506 connects the first high voltage source 502, is negative polarity d. c power supply, discharge voltage-18kV; Second discharge electrode 508 and the 3rd discharge electrode 510 are serial connection gear shape (on each gear uniform six teeth), and connect the second high voltage source 503, be the DC stacked high-frequency ac power of positive polarity, wherein, positive polarity direct-current working volts are+15kV; First earthing pole 507 and the second earthing pole 511 are hexagonal honeycomb body.Catalyst carrier is Al 2o 3; Doping SiO 2as co-catalyst, doping is mass percentage 20wt.%; Active component is Mn oxide and Cu oxide, and the mass percent that the mass percent that manganese accounts for catalyst 504 is 3%, copper accounts for catalyst 504 is 2wt.%; Adopt infrared heating regenerated catalyst.Utilize the catering oil fume purifier process restaurant kitchen fumes based on this configuration, process tolerance is 8610m 3/ h, testing result shows, to the removal efficiency of oil smoke contained particulate matters higher than 97.2%, VOC removal efficiency is higher than 83%.After process, fine particle concentration is lower than 0.98mg/m 3, VOC concentration is lower than 16.2mg/m 3, outlet ozone concentration is lower than 6.9mg/m 3.
embodiment 4:
Reaction of low temperature plasma district first discharge electrode 506 is serial connection gear shape (on each gear uniform four teeth), and the first discharge electrode 506 connects the first high voltage source 502, is negative polarity d. c power supply, discharge voltage-8kV; Second discharge electrode 508 and the 3rd discharge electrode 510 are serial connection gear shape (on each gear uniform four teeth), and connect the second high voltage source 503, be positive polarity direct-current superposition pulse power source, wherein, positive polarity direct-current working volts are+7kV; First earthing pole 507 and the second earthing pole 511 are cylindrical shape honeycomb ceramics.Catalyst carrier is TiO 2; Doped Ce O 2and La 2o 3as co-catalyst, doping is respectively 14wt.% and 3wt.%; Active component is ferriferous oxide and cobalt/cobalt oxide, accounts for 6wt.% and 2wt.% of the mass percent of catalyst 504 respectively; Adopt electric-heating-wire-heating regenerated catalyst.Utilize the catering oil fume purifier process restaurant kitchen fumes based on this configuration, process tolerance is 6640m 3/ h, testing result shows, to the removal efficiency of oil smoke fine particle higher than 96.6%, VOC removal efficiency is higher than 85%.After process, fine particle concentration is lower than 0.76mg/m 3, VOC concentration is lower than 13.8mg/m 3, outlet ozone concentration is lower than 7.3mg/m 3.
embodiment 5:
Reaction of low temperature plasma district first discharge electrode 506 is prickle shape, and the first discharge electrode 506 connects the first high voltage source 502, is negative polarity d. c power supply, discharge voltage-14kV; Second discharge electrode 508 and the 3rd discharge electrode 510 are needle point shape, connect the second high voltage source 503, and be the DC stacked high-frequency ac power of positive polarity, wherein, positive polarity direct-current working volts are+12kV; First earthing pole 507 and the second earthing pole 511 are tabular.Catalyst carrier is Al 2o 3; Doping La 2o 3and CeO 2as co-catalyst, addition content is respectively 8wt.% and 10wt.%; Active component is ferriferous oxide and nickel oxide, and the mass percent that iron and nickel account for catalyst is respectively 5wt.% and 2wt.%; Adopt microwave method thermal regeneration catalyst.Utilize the catering oil fume purifier process hotel kitchen fumes based on this configuration, process tolerance is 18400m 3/ h, testing result shows, to the removal efficiency of oil smoke contained particulate matters higher than 95.6%, VOC removal efficiency is higher than 82%.After process, fine particle concentration is lower than 0.78mg/m 3, VOC concentration is lower than 15.1mg/m 3, outlet ozone concentration is lower than 9.2mg/m 3.
embodiment 6:
Reaction of low temperature plasma district first discharge electrode 506 is star, and the first discharge electrode 506 connects the first high voltage source 502, is negative polarity d. c power supply, discharge voltage-12kV; Second discharge electrode 508 and the 3rd discharge electrode 510 are serial connection gear shape, connect the second high voltage source 503, and be positive polarity direct-current superposition pulse power source, wherein, positive polarity direct-current working volts are+11kV; First earthing pole 507 and the second earthing pole 511 are hexagon honeycomb ceramics.Catalyst carrier is Al 2o 3; Doped SIC and SiO 2as co-catalyst, addition content is respectively 13wt.% and 5wt.%; Active component is the oxide of manganese, and the mass percent that manganese accounts for catalyst 504 is 3wt.%, adopts infrared heating regenerated catalyst.Utilize the catering oil fume purifier process hotel kitchen fumes based on this configuration, process tolerance is 11300m 3/ h, testing result shows, to the removal efficiency of oil smoke fine particle higher than 96.5%, VOC removal efficiency is higher than 86.4%.After process, fine particle concentration is lower than 0.87mg/m 3, VOC concentration is lower than 8.5mg/m 3, outlet ozone concentration is lower than 6.8mg/m 3.

Claims (3)

1. utilize the synergy of low temperature plasma and catalyst to purify a method for kitchen fumes, it is characterized in that: the method allows oil smoke first by the reaction of low temperature plasma district of positive-negative polarity high voltage supply, then passes through catalytic reaction zone; In reaction of low temperature plasma district, realize the efficient removal of oil smoke contained particulate matters, and VOC contained by partial oxidation oil smoke; In catalytic reaction zone, organic species residual after the strong oxidizing property species catalytic oxidation reaction of low temperature plasma district effect utilizing reaction of low temperature plasma district to produce, makes it be oxidized to carbon dioxide and water;
In described reaction of low temperature plasma district, oil smoke is successively by the leading portion in reaction of low temperature plasma district, interlude and back segment, and the positive-negative polarity electrion utilizing leading portion alternately to arrange, realizes the separation or charged of oil smoke contained particulate matters; At interlude, the close to each other and Caragana seed pests of positively charged and particle that is negative electrical charge; Back segment realizes particle and continues Caragana seed pests, and the separation that is captured; In described catalytic reaction zone, when catalyst surface is polluted by oil smoke contained particulate matters, heatable catalytic regeneration process is carried out to catalyst;
The mode of described positive-negative polarity high voltage supply comprises positive or negative polarity direct current, the DC stacked high-frequency ac of positive or negative polarity, positive or negative polarity DC pulse superposition, and wherein, positive direct-current voltages is 6kV to 15kV, and negative dc voltage is 6kV to 18kV.
Described reaction of low temperature plasma district leading portion comprises the first discharge electrode, the second discharge electrode and the first earthing pole, described reaction of low temperature plasma district back segment comprises the 3rd discharge electrode and the second earthing pole, the first described discharge electrode connects the first high voltage source, is connected to the second high voltage source after the 3rd discharge electrode is in parallel with the second discharge electrode; Described first high voltage source is contrary with the second high voltage source polarity; Described method realizes smoke particle thing removal efficiency and reaches more than 95%, and VOC removal efficiency is higher than 80%.
2. one kind realizes the implement device utilizing the synergy of low temperature plasma and catalyst to purify kitchen fumes method according to claim 1, it is characterized in that: described device comprises petticoat pipe, bend pipe, the first spark arrester, clarifier preceding pipeline, clarifier, blower fan preceding pipeline, the second spark arrester, blower fan and chimney, each part mentioned above starts to connect in turn from the culinary cuisine kitchen range top, and is fixedly connected with between each parts and seals;
Described clarifier comprises the first high voltage source, second high voltage source, insulator, reaction of low temperature plasma district leading portion first discharge electrode, reaction of low temperature plasma district leading portion second discharge electrode, reaction of low temperature plasma district leading portion first earthing pole, interlude, reaction of low temperature plasma district back segment the 3rd discharge electrode, reaction of low temperature plasma district back segment second earthing pole, catalytic reaction zone catalyst and catalytic reaction zone regeneration heating device, on the first discharge electrode that the high-voltage connection of the first high voltage source and the second high voltage source is connected respectively to interlaced arrangement through insulator and the second discharge electrode, be connected to after 3rd discharge electrode is in parallel with the second discharge electrode in same high voltage source, 3rd discharge electrode is identical with the second discharge electrode structure be connected in parallel, first earthing pole is identical with the structure of the second earthing pole, first high voltage source is contrary with the second high voltage source polarity,
The first described earthing pole and the second earthing pole adopt flat board, cylinder honeycomb ceramics or polygon honeycomb ceramics; The first described discharge electrode, the second discharge electrode and the 3rd discharge electrode adopt jaggies, aciculiform line, astroid, prickle wire or serial connection gear line;
Described catalytic reaction zone used catalyst, carrier is aluminium oxide or titanium dioxide; Co-catalyst be carborundum, zirconium dioxide, ceria, lanthanum sesquioxide or silica, total addition content is mass percentage 10wt.% to 20wt.%; Active component is one or more in Mn oxide, Co oxide, Cu oxide, Fe oxide and Ni oxide, and activity component load quantity accounts for catalyst gross mass ratio in metallic element quality and counts 2wt.% to 8wt.%; In order to reduce vapour lock, the catalyst preparing that engineering is applied becomes cellular.
3. device according to claim 2, is characterized in that: described catalyst regeneration heater adopts heating using microwave, infrared heating, heating wire or electrothermal tube mode of heating.
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