CN103900132A - Compound type cooking fume purifier with coupling function - Google Patents
Compound type cooking fume purifier with coupling function Download PDFInfo
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- CN103900132A CN103900132A CN201410085144.1A CN201410085144A CN103900132A CN 103900132 A CN103900132 A CN 103900132A CN 201410085144 A CN201410085144 A CN 201410085144A CN 103900132 A CN103900132 A CN 103900132A
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Abstract
The invention provides a compound type cooking fume purifier with a coupling function. The compound type cooking fume purifier comprises a shell, wherein the shell is provided with an air inlet and an air outlet; a gas channel is formed between the air inlet and the air outlet; the gas channel is internally provided with a static electricity capturing unit and a catalytic absorption unit in sequence from the air inlet to the air outlet; the static electricity capturing unit comprises an ionization region and a capturing region; the catalytic absorption unit comprises a catalyst and a carrier for loading the catalyst; the catalyst comprises an active component and an auxiliary component; the active component is an oxide of a transition metal element; the auxiliary component is Al2O3 or TiO2. The cooking fume purifier is simple in structure, low in manufacturing cost, high in purification efficiency, compact in structure and long in service life and does not need to be frequently maintained; the catalytic absorption unit can be used for purifying upper-state cooking fume molecules stimulated by the static electricity capturing unit under a room temperature.
Description
Technical field
The present invention relates to cooking fume remover field, relate in particular to a kind of compound cooking fume remover with coupling function.
Background technology
Along with social progress, people's environmental consciousness and health perception strengthen day by day, and the pollution producing in culinary cuisine process more and more receives publicity on environment and healthy impact.Culinary cuisine is polluted mainly burning and exhausting and the cooking fume from combustion gas, and wherein mainly discharging pollutants of fuel gas buring is CO, NOx, SO
2with particle etc., and cooking fume comprises edible oil and food volatile matter and condensate aerosol thereof at high temperature, the gaseous mixture of aqueous vapor and indoor dusty gas, its contained composition is quite complicated, there is saturated fatty acid, unrighted acid, add the multiple short chain aldehyde after oxicracking, ketone, acid, the irritant taste product such as alcohol and dirt and steam etc., from form, cooking fume comprises particle and gaseous contaminant two classes, be that oil smoke discharge comprises granular material discharged (PM) and the VOC discharge (VOCs) that are made up of liquid and solid, wherein the particle diameter of particle is less, general viscosity is larger, therefore in kitchen oil fog, comprise gas, Gu, liquid three-phase.At present, the general mode that adopts range hood, the disposal of pollutants that culinary art is produced is in outdoor atmosphere, to reduce the harm to indoor environment, but the transfer that this just pollutes, this undressed direct discharge is on atmosphere pollution and healthyly caused very big impact, and fume pollution has become the large focus of complaining of one in atmosphere pollution at present.
In recent years in disclosed clarifying oil soot exhauster technology and device, adopt several different methods to carry out purified treatment to soot gas, the technology combining with static filter screen as cyclonic separation, High-voltage electrostatic purification technology, or the compound fume eliminating technology of several different methods combination, if Granted publication number is the Chinese invention patent of CN202350156U, publication number is the Chinese invention patent of CN1449858A, Granted publication number is the Chinese invention patent of CN202606304U etc., these methods can be improved discharge to a certain extent, but purification efficiency is not high, and be difficult to realize purification harmful and gas with foreign flavor.
The method of removing fumes peculiar smell has multiple, comprise charcoal absorption taste removal method, ozone deodorization method, photocatalyst taste removal method, catalyst taste removal method etc., if Granted publication number is the Chinese invention patents such as CN201200850Y, CN202927921U, CN201189431Y, CN201832713U, CN201463029U, CN26311616Y, CN2804683Y, publication number is the Chinese invention patents such as CN101607177A, CN101406789A, CN1765421A, CN1669654A etc.These remove fumes peculiar smells method ubiquity the problem of poor effect, wherein charcoal absorption taste removal is easily saturated, and bacterium, mould also may on activated carbon, breed, smelly, thereby cause secondary pollution; High-concentrated ozone can produce harm to people's health; Photocatalyst need increase uviol lamp, compared with power consumption, and ultraviolet ray meeting quickening plastic ageing, in use procedure, oil smoke solvent covers light source, causes photocatalyst to work; In existing catalyst method, conventionally need to use the noble metals such as palladium (Pd), platinum (Pt), silver (Ag), ubiquity taste removal poor effect, easily deteriorated, easily saturated problem.And, in existing catalyst method, catalyst generally acts under higher temperature, the Chinese invention patent " a kind of fume purifying catalyst and its preparation method and application " that is CN1140343C as Granted publication number discloses a kind of catalyst, the purification temperature of this catalyst is 200～500 DEG C, and the temperature of cooking fume is generally tens degree, and in purification process, can further reduce, and reach about room temperature.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of fume purifying effective for prior art, and can effectively remove at normal temperatures the compound cooking fume remover with coupling function of harmful and gas with foreign flavor.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of compound cooking fume remover with coupling function, comprise a housing, this housing has an air inlet and an air outlet, and between this air inlet and air outlet, form a gas passage, it is characterized in that: along described air inlet to air outlet, in described gas passage, set gradually Electrostatic unit and catalytic absorption unit, described Electrostatic unit comprises ionized region and trapping district, described catalytic absorption unit comprises the carrier of catalyst and this catalyst of load, wherein said catalyst comprises active component and helper component, this active component is the oxide of transiting group metal elements, helper component is Al
2o
3or TiO
2.
As preferably, described active component is one or more in Fe, Co, Ni, Cu, Zn, Ce oxide, the catalyst that adopts the ability of the active specy discharging with the second collection Electrostatic unit mesohigh static to match, ozone isoreactivity species can be further converted to the contour active specy of hydroxyl radical free radical (OH), then continue decomposable harmful substances kind.Key reaction process is as follows:
Reaction under high-pressure electrostatic:
1）e+O2→2O+e; （1）
2）O+O2→O3 （2）
Under coupled catalyst effect, further there is following reaction:
1）O+H2O→2·OH， （3）
2）HO2+O3→·OH+2O （4）
3）2·OH+O2→2HO2 （5）
Further, the mass ratio of described active component and described helper component is 2～15%.
Described carrier is honeycomb ceramic carrier plate, and this honeycomb ceramic carrier plate is BODY WITH SQUARE APERTURE structure, is fixedly installed in a framework.
For further strengthening clean-up effect, in described gas passage, be also provided with the oil smoke separative element that is positioned at front, described Electrostatic unit, this oil smoke separative element comprises screen pack, and this screen pack comprises multiple upper and lower staggered filters, thereby make to form three-stage filtration in this cooking fume remover strengthened purification effect.
Described filter is " V " font, in the periphery of filter, one frame is set, thereby form described screen pack, and described screen pack is undaform, when soot gas process screen pack, soot gas air current flow direction is changed, form turbulent flow and air-flow whirlpool, soot gas molecule and screen pack are fully collided, farthest remove oarse-grained oil droplet and water droplet in soot gas.
As preferably, described screen pack is drawer-type structure, and the thickness of screen pack is 10mm～70mm, drawer-type structure is convenient carries out regular maintenance and replacing to screen pack, and the suitable thickness of screen pack is ensureing under the prerequisite of filter effect, reduce space hold, reduce production costs.
Described second level Electrostatic unit is drawer-type structure, wherein said ionized region comprises energising tungsten filament and many groups the first ground connection pole plate, described trapping district comprises energising pole plate and many groups the second ground connection pole plate, and on this second ground connection pole plate, circular hole is set, circular hole is internally connected with electrical conductor, so that form voltage between adjacent the second ground connection pole plate, drawer-type structure is convenient carries out regular maintenance and replacing to Electrostatic unit, soot gas enters after Electrostatic unit, make the different electric charge of particle band in soot gas through ionized region, during through trapping district, under the effect of electric field force, particle with different electric charges is moved to the pole plate of opposed polarity respectively, thereby reach the effect of trapping fine particle, meanwhile, because Electrostatic unit has stronger power, the airborne oxygen of part is ionized as active oxygen atom, single oxygen atom is combined with an oxygen molecule, forms ozone.
As preferably, the length of described ionized region is 20mm～50mm, and the spacing between adjacent the first ground connection pole plate is 20mm～80mm; The length in described trapping district is 200mm～500mm, spacing between adjacent the second ground connection pole plate is 12mm～25mm, ionized region can make different electric charge on the particle band in soot gas like this, and particle with different electric charges can fully separate while arriving trapping district, reaches the effect of trapping.
The bottom of described housing is provided with a draw-off tray, the lower end of described first order oil smoke separative element and Electrostatic unit, the second level is respectively arranged with an oil leakaging port communicating with described draw-off tray, the oil droplet that the first oil smoke separative element and the filtration of Electrostatic unit, the second level are collected and water droplet are under Action of Gravity Field, in oil leakaging port collection and draw-off tray.
The preparation of the catalyst described in technique scheme comprises the following steps:
(1) honeycomb ceramic plate pretreatment: by Al
3o
3or TiO
2powder mixes with deionized water, emulsification 5～10 minutes, and the suspension that formation concentration is 0.1～0.6mol/L, impregnated in above-mentioned suspension by honeycomb ceramic carrier plate, puts into 100 DEG C of dry oven dry of baking oven;
(2) catalyst activity component precursor solution preparation: one or more in magnesium-yttrium-transition metal nitrate are dissolved in deionized water, fully stir and form the solution that concentration is 0.1～1.5mol/L, to the adhesive that adds solution weight 0.3-2.0wt% in the solution making, emulsification 5～10 minutes, makes catalyst activity component presoma;
(3) catalyst activity component load: the pretreated honeycomb ceramic plate of described step (1) be impregnated in described precursor solution, dry and be placed in Muffle furnace, 200～700 DEG C are heated 2～5 hours, make described catalyst.
Described in above-mentioned steps (2), magnesium-yttrium-transition metal nitrate is Fe (NO
3)
3, Co (NO
3)
2, Ni (NO
3)
2, Cu (NO
3)
2, Zn (NO
3)
2, Ce (NO
3)
3, Mn (NO
3)
2in one or more.
Adhesive in above-mentioned steps (2) is the one in waterglass, bentonite or ZSM-5 molecular sieve.
Compared with prior art; the invention has the advantages that: the cooking fume remover in the present invention comprises Electrostatic unit and catalytic absorption unit; by repeatedly protecting and the method for purification and high-pressure electrostatic coupling and catalyzing; can reach more than 90% by clearance the disposable of the grease in soot gas, particle, volatile organic matter, gas with foreign flavor and other pernicious gases; realize efficient, the lasting purification to kitchen fume; purify oil smoke, protected atmospheric environment.Particularly, this cooking fume remover has the following advantages:
(1) simple in structure, cost of manufacture is low:
This clarifier is the system of a sealing, cooking fume cross-current mistake, and internal system part is simple, is difficult for stopping up, and reliable operation, has also reduced cost simultaneously.
(2) purification efficiency is high, and equipment resistance is little:
The results showed, the present invention is greater than 90% to the smoke gas purification rate of passing through, and owing to adopting purification way taking collision, Electrostatic as main, the flow resistance of air-flow is little, and wind loss is little.
(3) good purification, energy consumption is low:
The present invention filters through Electrostatic unit and catalytic absorption unit, wherein Electrostatic unit has stronger power except airborne oxygen being ionized for active oxygen atom, also make the main component (pernicious gas VOCs and peculiar smell) in cooking fume now be energized into upper state, form upper state oil smoke molecule, when the pernicious gas VOCs of place's upper state and smell substance enter catalytic absorption purification unit, catalyst can act on it at normal temperatures, reduce energy consumption, strengthen the clean-up effect in catalytic absorption unit, if and the not premenstrual road of these pernicious gases and smell substance Electrostatic cell processing, because there are not described high activity species and make these pernicious gases and smell substance be energized into the words of upper state, catalyst cannot carry out effective catalytic decomposition to it at normal temperatures.
(4) purifier volume is little, compact conformation:
Compact conformation of the present invention, volume is small and exquisite, is applicable to being arranged in average family kitchen, has realized the air cleaning of family cooking.
(5) long service life, without frequent maintenance:
This equipment reliable operation, the non-maintaining cycle is long, can work reliably and with long-term in Electrostatic unit, without special maintenance, the catalyst using in catalytic absorption unit is taking the honeycomb ceramic plate through specially treated as carrier, active component taking transition group metallic oxide as catalyst, durable in use, the life-span is long.
Brief description of the drawings
Fig. 1 is the structural representation of the compound cooking fume remover with coupling function of the embodiment of the present invention 1;
Fig. 2 is the other direction structural representation of the compound cooking fume remover with coupling function of the embodiment of the present invention 1.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
Embodiment 1:
As Fig. 1, shown in 2, a kind of compound cooking fume remover with coupling function, comprise a housing 1, the two ends, left and right of this housing 1 are respectively arranged with air inlet 11 and air outlet 12, and form a gas passage between air inlet 11 and air outlet 12, wherein air inlet 11 and air outlet 12 places are respectively arranged with air intake cover 111 and outlet housing 121, be used for entering, go out gas and carry out water conservancy diversion, the cross section of air inlet 11 and air outlet 12 is rounded, the cross section expansion of gas channel is square, simultaneously along air inlet 11 to air outlet 12, in gas passage, set gradually oil smoke separative element 2, Electrostatic unit 3 and catalytic absorption unit 4, soot gas is from air inlet 11, through the guide functions of air intake cover 111, successively by oil smoke separative element 2, Electrostatic unit 3 and catalytic absorption unit 4, the air outlet 12 that passes through outlet housing 121 and be connected with outlet housing 121 again, thereby outside discharge chamber.The lower central of housing 1 is provided with a draw-off tray 6, the lower end of above-mentioned oil smoke separative element 2 and Electrostatic unit 3 is respectively arranged with an oil leakaging port (not shown) communicating with draw-off tray 6, thereby can make the smoke particle of absorption in oil smoke separative element 2 and Electrostatic unit 3 under Action of Gravity Field, be collected in draw-off tray 6 along oil leakaging port.For convenience of the setting of this cooking fume remover, the two ends of housing 1 bottom are also provided with feet 5.
Oil smoke separative element 2 comprises undaform aluminium alloy screen pack 21, the periphery of screen pack 21 is coated with metal edge frame 22, metal edge frame 22 inside arrange " V " font of multiple being, upper and lower staggered filter, when soot gas process screen pack, soot gas air current flow direction is changed, form turbulent flow and air-flow whirlpool, can make soot gas molecule and screen pack fully collide, farthest remove oarse-grained oil droplet and water droplet in soot gas.Further, screen pack is drawer-type structure, and drawer-type structure is convenient carries out regular maintenance and replacing to screen pack; The thickness of screen pack is 20mm, can, ensureing, under the prerequisite of filter effect, to reduce space hold, reduce production costs.Soot gas purifies through the first order of oil smoke separative element 2, can effectively remove oarse-grained oil droplet, water droplet etc.
Electrostatic unit 3 comprises ionized region 31 and trapping district 32, provide power supply by electronic box 7, wherein ionized region 31 comprises energising tungsten filament and many groups the first ground connection pole plate, trapping district comprises energising pole plate and many groups the second ground connection pole plate, and on this second ground connection pole plate, circular hole is set, circular hole is internally connected with electrical conductor, so that form voltage between adjacent the second ground connection pole plate, soot gas enters after Electrostatic unit 3, make the different electric charge of particle band in soot gas through ionized region 31, during through trapping district 32, under the effect of electric field force, particle with different electric charges is moved to the pole plate of opposed polarity respectively, thereby reach the effect of trapping fine particle, simultaneously, because Electrostatic unit has stronger power, making the airborne oxygen molecule ionization of part is active oxygen atom, single oxygen atom is combined with an oxygen molecule, form active specy, as ozone (O3), but also by the pernicious gas VOCs in cooking fume and peculiar smell molecule equal excitation to upper state, form upper state cooking fume molecule.Key reaction process is as follows:
1）e+O
2→2O+e; （1）
2）O+O
2→O
3 （2）
In the present embodiment, this Electrostatic unit 3 is drawer-type structure, so conveniently this Electrostatic unit 3 is carried out to regular maintenance and replacing, and meanwhile, in the present embodiment, the length of ionized region 31 is 30mm, and the spacing between adjacent the first ground connection pole plate is 20mm; The length in described trapping district 32 is 250mm, spacing between adjacent the second ground connection pole plate is 20mm, ionized region 31 can make different electric charge on the particle band in soot gas like this, and particle with different electric charges can fully separate while arriving trapping district 32, reaches the effect of trapping.
Catalytic absorption unit 4 comprises the active specy (O that can discharge with Electrostatic unit 3
3) energy level match and this active specy can be further converted to the catalyst (not shown) of high activity species and the carrier of this catalyst of load.The active component of catalyst is one or more in Fe, Co, Ni, Cu, Zn, Ce oxide, and the carrier of this catalyst of load is honeycomb ceramic carrier plate 42, is fixedly installed in a framework 41.The coupling of " absorption/concentrated-catalysis " has been realized in catalytic absorption unit 4, particularly: under the ozone isoreactivity species effect of the energy that catalyst provides in the static place of Electrostatic unit 3 and generation, under normal temperature, the peculiar smell molecule and the pernicious gas molecule Quick Oxidation that in soot gas, are energized into upper state are decomposed, remove volatile organic matter and gas in oil smoke.Key reaction process is as follows:
Reaction under high-pressure electrostatic:
1）e+O2→2O+e; （1）
2）O+O2→O3 （2）
Under coupling catalyst action, further there is following reaction:
1）O+H2O→2·OH， （3）
2）HO2+O3→·OH+2O （4）
3）2·OH+O2→2HO2 （5）
Catalytic absorption unit 4 mainly comprises following functions: 1) catch and concentrated pollutant; 2) receive ozone isoreactivity species and the upper state molecule that electrostatic field produces; 3) hydroxyl radical free radical (OH) and the active oxygen (O-, O2-, O3-) etc. that produce are the innocuous substances such as CO2 and water by the oxidation Decomposition such as volatile organic matter, hydrocarbon in oil smoke under normal temperature.Catalyst can make to be attracted to the peculiar smell on carrier and pernicious gas constantly decomposes or oxidation conversion is innocuous substance, avoid adsorbing the shortcoming that no longer includes clean-up effect after saturated, realize permanent use, without the object of special maintenance, and catalyst is before and after reaction, physics, chemical property are constant, can not be consumed, so not increase in time and decaying of the catalytic capability of self.
In the present embodiment, the preparation method of catalyst is:
First, honeycomb ceramic plate pretreatment: by Al
2o
3or TiO
2powder mixes with deionized water, emulsification 5～10 minutes, and the suspension that formation concentration is 0.1～0.6mol/L, impregnated in above-mentioned suspension by honeycomb ceramic carrier plate, puts into 100 DEG C of oven dry of baking oven.
Secondly, catalyst activity component precursor solution preparation: one or more in Fe, Co, Ni, Cu, Zn, Ce, Mn metal nitrate are dissolved in deionized water, fully stir and form the solution that concentration is 0.1～1.5mol/L, to the adhesive that adds solution weight 0.3～2.0wt% in the solution making, emulsification 5～10 minutes, makes catalyst activity component presoma.
Finally, catalyst activity component load: pretreated honeycomb ceramic plate be impregnated in precursor solution, dry and be placed in Muffle furnace, 200～700 DEG C are heated 2～5 hours, make described catalyst.
Preparation method below by 2～12 pairs of catalyst of embodiment is specifically addressed:
Embodiment 2:
First by 5.1g Al
2o
3mix with 500ml deionized water, emulsification 5 minutes, the suspension that formation concentration is 0.1mol/L, by honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Fe(NO that is, 0.1mol/L to 500ml concentration
3)
3in solution, add 5g waterglass, emulsification 5 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 200 DEG C of heating of Muffle furnace 2 hours, make required catalyst, Fe in the catalyst making as calculated
2o
3with Al
2o
3mass ratio be 12%.
The above-mentioned FeOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 91.8% of grease in cooking fume, particulate matter removal efficiencies is 95.3%, and volatile organic matter clearance is 22.4%.
Embodiment 3:
First by 20.4g Al
2o
3mix with 500ml deionized water, emulsification 5 minutes, the suspension that formation concentration is 0.4mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Co(NO that is, 0.14mol/L to 500ml concentration
3)
2in solution, add 7.5g bentonite, emulsification 5 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 300 DEG C of heating of Muffle furnace 3 hours, make required catalyst, CoO and Al in the catalyst making as calculated
2o
3mass ratio be 2%.
The above-mentioned CoOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 94.2% of grease in cooking fume, particulate matter removal efficiencies is 98.1%, and volatile organic matter clearance is 32.3%.
Embodiment 4:
First by 30.6g Al
2o
3mix with 500ml deionized water, emulsification 5 minutes, the suspension that formation concentration is 0.6mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Ni(NO that is, 1mol/L to 500ml concentration
3)
2in solution, add 10g ZSM-5 molecular sieve, emulsification 5 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 400 DEG C of heating of Muffle furnace 4 hours, make required catalyst, NiO and Al in the catalyst making as calculated
2o
3mass ratio be 8%.
The above-mentioned NiOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 94.8% of grease in cooking fume, particulate matter removal efficiencies is 98.3%, and volatile organic matter clearance is 33.7%.
Embodiment 5:
First by 4g TiO
2mix with 500ml deionized water, emulsification 5 minutes, the suspension that formation concentration is 0.1mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Cu(NO that is, 1.5mol/L to 500ml concentration
3)
2in solution, add 10g ZSM-5 molecular sieve, emulsification 5 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 500 DEG C of heating of Muffle furnace 5 hours, make required catalyst, CuO and TiO in the catalyst making as calculated
2mass ratio be 15%.
The above-mentioned CuOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 92.7% of grease in cooking fume, particulate matter removal efficiencies is 96.4%, and volatile organic matter clearance is 29.8%.
Embodiment 6:
First by 16g TiO
2mix with 500ml deionized water, emulsification 10 minutes, the suspension that formation concentration is 0.6mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Zn(NO that is, 1mol/L to 500ml concentration
3)
2in solution, add 15g ZSM-5 molecular sieve, emulsification 10 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 600 DEG C of heating of Muffle furnace 6 hours, make required catalyst, Zn in the catalyst making as calculated
2o and TiO
2mass ratio be 15%.
The above-mentioned ZnOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 90.9% of grease in cooking fume, particulate matter removal efficiencies is 93.8%, and volatile organic matter clearance is 40.2%.
Embodiment 7:
First by 24g TiO
2mix with 500ml deionized water, emulsification 10 minutes, the suspension that formation concentration is 0.6mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Ce(NO that is, 1mol/L to 500ml concentration
3)
3in solution, add 10g ZSM-5 molecular sieve, emulsification 10 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 700 DEG C of heating of Muffle furnace 7 hours, make required catalyst, Ce in the catalyst making as calculated
2o
3with TiO
2mass ratio be 6%.
The above-mentioned CeOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 90.3% of grease in cooking fume, particulate matter removal efficiencies is 92.1%, and volatile organic matter clearance is 49.7%.
Embodiment 8:
First by 5.1g Al
2o
3mix with 500ml deionized water, emulsification 5 minutes, the suspension that formation concentration is 0.1mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Mn(NO that is, 1mol/L to 500ml concentration
3)
2in solution, add 10g ZSM-5 molecular sieve, emulsification 10 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 500 DEG C of heating of Muffle furnace 3 hours, make required catalyst, Mn in the catalyst making as calculated
2o and Al
2o
3mass ratio be 13%.
The above-mentioned MnOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 97.3% of grease in cooking fume, particulate matter removal efficiencies is 98.5%, and volatile organic matter clearance is 42.6%.
Embodiment 9:
First by 5.1g Al
2o
3mix with 500ml deionized water, emulsification 5 minutes, the suspension that formation concentration is 0.1mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Mn(NO that is, 1mol/L to 500ml concentration
3)
2, Co(NO
3)
2in mixed solution (mol ratio of two kinds of nitrate is 1:1), add 10g ZSM-5 molecular sieve, emulsification 10 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 300 DEG C of heating of Muffle furnace 3 hours, make required catalyst, Mn in the catalyst making as calculated
2o and CoO and Al
2o
3mass ratio be 10%.
The above-mentioned Co-MnOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 98.9% of grease in cooking fume, particulate matter removal efficiencies is 99.2%, and volatile organic matter clearance is 51.2%.
Embodiment 10:
First by 5.1g Al
2o
3mix with 500ml deionized water, emulsification 5 minutes, the suspension that formation concentration is 0.1mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Mn(NO that is, 1mol/L to 500ml concentration
3)
2, Ni(NO
3)
2in mixed solution (mol ratio of two kinds of nitrate is 1:1), add 10g ZSM-5 molecular sieve, emulsification 10 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 300 DEG C of heating of Muffle furnace 3 hours, make required catalyst, Mn in the catalyst making as calculated
2o, NiO sum and Al
2o
3mass ratio be 7%.
The above-mentioned Ni-MnOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 99.2% of grease in cooking fume, particulate matter removal efficiencies is 99.7%, and volatile organic matter clearance is 53.7%.
Embodiment 11:
First by 5.1g Al
2o
3mix with 500ml deionized water, emulsification 5 minutes, the suspension that formation concentration is 0.1mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Mn(NO that is, 1mol/L to 500ml concentration
3)
2, Cu(NO
3)
2in mixed solution (mol ratio of two kinds of nitrate is 1:1), add 10g ZSM-5 molecular sieve, emulsification 10 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 400 DEG C of heating of Muffle furnace 3 hours, make required catalyst, Mn in the catalyst making as calculated
2o, CuO sum and Al
2o
3mass ratio be 8%.
The above-mentioned Cu-MnOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 97.9% of grease in cooking fume, particulate matter removal efficiencies is 98.8%, and volatile organic matter clearance is 49.3%.
Embodiment 12:
First by 5.1g Al
2o
3mix with 500ml deionized water, emulsification 5 minutes, the suspension that formation concentration is 0.1mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Ni(NO that is, 1mol/L to 500ml concentration
3)
2, Cu(NO
3)
2in mixed solution (mol ratio of two kinds of nitrate is 1:1), add 10g ZSM-5 molecular sieve, emulsification 10 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 500 DEG C of heating of Muffle furnace 3 hours, make required catalyst, NiO, CuO sum and Al in the catalyst making as calculated
2o
3mass ratio be 14%.
The above-mentioned Ni-CuOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 94.6% of grease in cooking fume, particulate matter removal efficiencies is 97.2%, and volatile organic matter clearance is 41.7%.
Embodiment 13:
First by 5.1g Al
2o
3mix with 500ml deionized water, emulsification 5 minutes, the suspension that formation concentration is 0.1mol/L, impregnated in honeycomb ceramic carrier plate in above-mentioned suspension, puts into 100 DEG C of oven dry of baking oven.
Then the Ni(NO that is, 1mol/L to 500ml concentration
3)
2, Co(NO
3)
2in mixed solution (mol ratio of two kinds of nitrate is 1:1), add 10g ZSM-5 molecular sieve, emulsification 10 minutes, makes catalyst activity component presoma.
Finally the honeycomb ceramic plate of processing be impregnated in precursor solution, put into after oven for drying, be placed in 600 DEG C of heating of Muffle furnace 3 hours, make required catalyst, NiO, CoO sum and Al in the catalyst making as calculated
2o
3mass ratio be 12%.
The above-mentioned Ni-CoOx Supported Honeycomb Ceramics type catalyst making is placed in to catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 97.8% of grease in cooking fume, particulate matter removal efficiencies is 98.6%, and volatile organic matter clearance is 46.8%.
To sum up, the cooking fume remover in the present invention, makes soot gas first pass through oil smoke separative element, by changing air current flow direction, forms turbulent flow and air-flow whirlpool, and soot gas is collided fully, has removed oarse-grained oil droplet, water droplet in cooking fume.Then, make cooking fume enter Electrostatic unit, make the different electric charges of particle band in cooking fume through ionized region, during through trapping district, under the effect of electric field force, the particle with different electric charges is moved to the pole plate of opposed polarity respectively, reach the effect of trapping fine particle; Simultaneously, because Electrostatic unit has stronger power, the airborne oxygen of part is ionized as active oxygen atom, single oxygen atom is combined with an oxygen molecule, form ozone, and the pernicious gas molecule in cooking fume and peculiar smell molecule are energized into upper state.Through the purified treatment of said two units, remove most particles in cooking fume, now the main component in cooking fume is pernicious gas VOCs and peculiar smell.The ozone that high-pressure electrostatic produces has certain oxidisability, but independent ozone is very limited to the removal ability of organic pollution and peculiar smell.In order further to promote the removal to pernicious gas, by having adopted the catalyst that can match with the energy level of active specy that high-pressure electrostatic discharges, ozone isoreactivity species can be further converted to the contour active specy of hydroxyl radical free radical (OH), decomposing harmful substances then.Therefore in catalytic absorption unit, taking the honeycomb ceramic plate through specially treated as carrier, this carrier can carry out efficient adsorption and trapping to the pernicious gas in soot gas and peculiar smell; Active specy component taking transition group metallic oxide as catalyst, be carried on honeycomb ceramic plate carrier surface, under the ozone isoreactivity species effect of the energy providing at electrostatic field and generation, peculiar smell in soot gas and pernicious gas Quick Oxidation are decomposed, remove volatile organic matter and gas in oil smoke.By the purification of above-mentioned three unit, cooking fume discharge after treatment is more clean harmless, has farthest eliminated the harm of kitchen fume on human health and the impact on atmospheric environment.
Claims (13)
1. a compound cooking fume remover with coupling function, comprises a housing, and this housing has an air inlet and an air outlet, and between this air inlet and air outlet, forms a gas passage, it is characterized in that:
Along described air inlet to air outlet, in described gas passage, set gradually Electrostatic unit and catalytic absorption unit, described Electrostatic unit comprises ionized region and trapping district, described catalytic absorption unit comprises the carrier of catalyst and this catalyst of load, wherein said catalyst comprises active component and helper component, this active component is the oxide of transiting group metal elements, and helper component is Al
2o
3or TiO
2.
2. the compound cooking fume remover with coupling function as claimed in claim 1, is characterized in that: described active component is one or more in Fe, Co, Ni, Cu, Zn, Ce oxide.
3. the compound cooking fume remover with coupling function as claimed in claim 1, is characterized in that: the mass ratio of described active component and described helper component is 2～15%.
4. the compound cooking fume remover with coupling function as described in claim 1 or 2 or 3, is characterized in that: described carrier is honeycomb ceramic carrier plate.
5. the compound cooking fume remover with coupling function as claimed in claim 4, it is characterized in that: in described gas passage, be also provided with the oil smoke separative element that is positioned at front, described Electrostatic unit, this oil smoke separative element comprises screen pack, and this screen pack comprises multiple upper and lower staggered filters.
6. the compound cooking fume remover with coupling function as claimed in claim 5, is characterized in that: described filter is " V " font, in the periphery of filter, one frame is set, thereby forms described screen pack, and described screen pack is undaform.
7. the compound cooking fume remover with coupling function as claimed in claim 6, is characterized in that: described screen pack is drawer-type structure, the thickness of screen pack is 10mm～70mm.
8. the compound cooking fume remover with coupling function as claimed in claim 4, it is characterized in that: described Electrostatic unit is drawer-type structure, wherein said ionized region comprises energising tungsten filament and many groups the first ground connection pole plate, described trapping district comprises energising pole plate and many groups the second ground connection pole plate, and on this second ground connection pole plate, circular hole is set, circular hole is internally connected with electrical conductor, so that form voltage between adjacent the second ground connection pole plate.
9. the compound cooking fume remover with coupling function as claimed in claim 8, is characterized in that: the length of described ionized region is 20mm～50mm, the spacing between adjacent the first ground connection pole plate is 20mm～80mm; The length in described trapping district is 200mm～500mm, and the spacing between adjacent the second ground connection pole plate is 12mm～25mm.
10. the compound cooking fume remover with coupling function as claimed in claim 5, it is characterized in that: the bottom of described housing is provided with a draw-off tray, the lower end of described oil smoke separative element and Electrostatic unit is respectively arranged with an oil leakaging port communicating with described draw-off tray.
The preparation method of 11. 1 kinds of catalyst as claimed in claim 4, is characterized in that comprising the following steps:
(1) honeycomb ceramic plate pretreatment: by Al
2o
3or TiO
2powder mixes with deionized water, emulsification 5～10 minutes, and the suspension that formation concentration is 0.1～0.6mol/L, impregnated in above-mentioned suspension by honeycomb ceramic carrier plate, puts into 100 DEG C of dry oven dry of baking oven;
(2) catalyst activity component precursor solution preparation: one or more in magnesium-yttrium-transition metal nitrate are dissolved in deionized water, fully stir and form the solution that concentration is 0.1～1.5mol/L, to the adhesive that adds this solution quality 0.3-2.0wt% in the solution making, emulsification 5～10 minutes, makes catalyst activity component presoma;
(3) catalyst activity component load: the pretreated honeycomb ceramic plate of described step (1) be impregnated in described precursor solution, dry and be placed in Muffle furnace, 200～700 DEG C are heated 2～5 hours, make described catalyst.
The preparation method of 12. catalyst as claimed in claim 11, is characterized in that: described magnesium-yttrium-transition metal nitrate is Fe (NO
3)
3, Co (NO
3)
2, Ni (NO
3)
2, Cu (NO
3)
2, Zn (NO
3)
2, Ce (NO
3)
3, Mn (NO
3)
2in one or more.
The preparation method of 13. catalyst as claimed in claim 12, is characterized in that: described adhesive is the one in waterglass, bentonite or ZSM-5 molecular sieve.
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| CN201410079957.X | 2014-03-06 | ||
| CN201410079957X | 2014-03-06 | ||
| CN201410085144.1A CN103900132B (en) | 2014-03-06 | 2014-03-10 | A kind of compound cooking fume remover with coupling function |
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| CN103900132B CN103900132B (en) | 2016-07-13 |
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| CN203744346U (en) | 2014-07-30 |
| CN103900132B (en) | 2016-07-13 |
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