CN103900132B - A kind of compound cooking fume remover with coupling function - Google Patents
A kind of compound cooking fume remover with coupling function Download PDFInfo
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Abstract
A kind of compound cooking fume remover with coupling function, including a housing, this housing has an air inlet and an air outlet, and between this air inlet and air outlet, form a gas passage, along described air inlet to air outlet, Electrostatic unit and catalytic absorption unit is set gradually in described gas passage, described Electrostatic unit includes ionized region and trapping district, described catalytic absorption unit includes catalyst and the carrier of this catalyst of load, wherein said catalyst includes active component and helper component, this active component is the oxide of transiting group metal elements, helper component is Al2O3Or TiO2.This oil smoke cleaning device structure is simple, and cost of manufacture is low, and purification efficiency is high, compact conformation, and long service life, it is not necessary to often safeguard, and the upper state cooking fume molecule excited through Electrostatic unit can be purified by catalytic absorption unit at normal temperatures.
Description
Technical field
The present invention relates to cooking fume remover field, particularly relate to a kind of compound cooking fume remover with coupling function.
Background technology
Along with social progress, environmental consciousness and the health perception of people strengthen day by day, and environment and healthy impact are increasingly received publicity by polluting of producing in culinary cuisine process.Culinary cuisine pollutes the burning and exhausting essentially from combustion gas and cooking fume, and wherein the primary discharge pollutant of fuel gas buring are CO, NOx, SO2With particulate matter etc., and cooking fume includes edible oil and food volatile matter at high temperature and condensate aerosol thereof, the gaseous mixture of aqueous vapor and indoor dusty gas, contained by it, composition is considerably complicated, there is satisfied fatty acid, unsaturated fatty acid, plus 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 includes particulate matter and gaseous contaminant two class, namely oil smoke discharge includes granular material discharged (PM) that be made up of liquid and solid and VOC discharge (VOCs), wherein the particle diameter of particulate matter is less, general viscosity is bigger, therefore kitchen oil fog comprises gas, Gu, liquid three-phase.At present, it is generally adopted the mode of range hood, disposal of pollutants culinary art produced is in outdoor air, to reduce the harm to indoor environment, but this transfer simply polluted, this undressed direct discharge is to atmospheric pollution and the healthy extreme influence that causes, and current fume pollution has become in atmospheric pollution and complained greatly focus.
In recent years in disclosed clarifying oil soot exhauster technology and device, adopt multiple method that soot gas is carried out purified treatment, such as the technology that cyclonic separation combines with static filter screen, High-voltage electrostatic purification technology, or the compound fume eliminating technology that multiple method combines, if Authorization Notice No. is the Chinese invention patent of CN202350156U, publication number is the Chinese invention patent of CN1449858A, Authorization Notice No. is the Chinese invention patent etc. of CN202606304U, these methods can improve discharge to a certain extent, but purification efficiency is not high, and it is difficult to harmful purification with gas with foreign flavor.
The method removing fumes peculiar smell has multiple, including activated carbon adsorption taste removal method, ozone deodorization method, photocatalyst taste removal method, catalyst taste removal method etc., if Authorization Notice No. is the Chinese invention patents such as CN201200850Y, CN202927921U, CN201189431Y, CN201832713U, CN201463029U, CN26311616Y, CN2804683Y, publication number is the Chinese invention patents etc. such as CN101607177A, CN101406789A, CN1765421A, CN1669654A.These remove the method ubiquity problem of poor effect of fumes peculiar smells, and wherein activated carbon adsorption taste removal is easily saturated, and antibacterial, mycete be also possible to breeding on activated carbon, smelly, thus cause secondary pollution；The healthy of people can be produced harm by high-concentrated ozone；Photocatalyst need to increase uviol lamp, relatively power consumption, and ultraviolet can accelerate plastic ageing, and in use procedure, light source is covered by oil smoke solvent, causes that photocatalyst cannot work；Existing catalyst method typically requires noble metals such as using palladium (Pd), platinum (Pt), silver (Ag), it is common to there is taste removal poor effect, easily deteriorate, easily saturated problem.And, in existing catalyst method, catalyst generally acts at relatively high temperatures, Chinese invention patent " a kind of fume purifying catalyst and its preparation method and application " if Authorization Notice No. is CN1140343C 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 can reduce further in purification process, and reach room temperature.
Summary of the invention
The technical problem to be solved is to provide a kind of fume purifying effective for prior art, and can effectively remove harmful and gas with foreign flavor the compound cooking fume remover with coupling function at normal temperatures.
This invention address that the technical scheme that the above-mentioned technical problem of solution adopts is: a kind of compound cooking fume remover with coupling function, including 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, Electrostatic unit and catalytic absorption unit is set gradually in described gas passage, described Electrostatic unit includes ionized region and trapping district, described catalytic absorption unit includes catalyst and the carrier of this catalyst of load, wherein said catalyst includes active component and helper component, this active component is the oxide of transiting group metal elements, helper component is Al2O3Or TiO2。
As preferably, described active component is one or more in Fe, Co, Ni, Cu, Zn, Ce oxide, adopt the catalyst that the ability of the active specy discharged with the second collection Electrostatic unit mesohigh electrostatic matches, ozone isoreactivity species can be further converted to hydroxyl radical free radical (OH) contour active specy, then continue decomposable harmful substances kind.Dominant response process is as follows:
Reaction under high-pressure electrostatic:
1) e+O2 → 2O+e;(1)
2) O+O2 → O3(2)
Following reaction is there is further under coupled catalyst effect:
1) O+H2O → 2 OH, (3)
2) HO2+O3 → OH+2O(4)
3) 2 OH+O2 → 2HO2(5)
Further, described active component is 2～15% with the mass ratio of described helper component.
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 strengthening clean-up effect further, the oil smoke separative element being positioned at described Electrostatic unit front it is additionally provided with in described gas passage, this oil smoke separative element includes drainage screen, and this drainage screen includes multiple upper and lower staggered filter, so that this cooking fume remover is formed three-stage filtration, strengthened purification effect.
Described filter is V-shaped, in the periphery of filter, one frame is set, thus forming described drainage screen, and described drainage screen is undaform, soot gas, through drainage screen, makes soot gas air current flow direction change, and forms turbulent flow and air flow swirl, soot gas molecule and drainage screen are fully collided, farthest removes oarse-grained oil droplet and water droplet in soot gas.
As preferably, described drainage screen is drawer-type structure, and the thickness of drainage screen is 10mm～70mm, drawer-type structure is convenient carries out regular maintenance and replacing to drainage screen, and the suitable thickness of drainage screen is under the premise ensureing filter effect, reduce space hold, reduce production cost.
Described second level Electrostatic unit is drawer-type structure, wherein said ionized region includes energising tungsten filament and many groups the first ground connection pole plate, described trapping district includes energising pole plate and many groups the second ground connection pole plate, and this second ground connection pole plate arranges circular hole, circular hole is internally connected with electrical conductor, so that forming voltage between adjacent second ground pole plate, drawer-type structure is convenient carries out regular maintenance and replacing to Electrostatic unit, after soot gas enters Electrostatic unit, make the particulate matter in soot gas with different electric charges through ionized region, through trapping district, under the effect of electric field force, the particulate matter with difference electric charge is made to move to the pole plate of opposed polarity respectively, thus reaching the effect of trapping fine particle；Simultaneously as Electrostatic unit has stronger power, make the oxygen in partial air be ionized and combine into active oxygen atom, single oxygen atom and an oxygen molecule, form ozone.
As preferably, the length of described ionized region is 20mm～50mm, and the spacing between adjacent first ground connection pole plate is 20mm～80mm；The length in described trapping district is 200mm～500mm, spacing between adjacent second ground pole plate is 12mm～25mm, such ionized region can make electric charges different on the particulate matter band in soot gas, and the particulate matter with difference electric charge arrives trapping Qu Shineng and is sufficiently separated, and 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 second level Electrostatic unit is respectively arranged with an oil leakaging port communicated with described draw-off tray, oil droplet that first oil smoke separative element and second level Electrostatic unit collect by filtration and water droplet under gravity, by oil leakaging port collect with in draw-off tray.
The preparation of the catalyst described in technique scheme comprises the following steps:
(1) honeycomb ceramic plate pretreatment: by Al3O3Or TiO2Powder body mixes with deionized water, emulsifying 5～10 minutes, forms the suspension that concentration is 0.1～0.6mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, puts into the dry drying of 100 DEG C of baking oven；
(2) prepared by catalyst activity component precursor solution: be dissolved in deionized water by one or more in magnesium-yttrium-transition metal nitrate, being sufficiently stirred for formation concentration is the solution of 0.1～1.5mol/L, the adhesive of solution weight 0.3-2.0wt% is added in prepared solution, emulsifying 5～10 minutes, prepares catalyst activity component presoma；
(3) catalyst activity component load: impregnated in described precursor solution by honeycomb ceramic plate pretreated for described step (1), dries and is placed in Muffle furnace, and 200～700 DEG C are heated 2～5 hours, prepare described catalyst.
Magnesium-yttrium-transition metal nitrate described in above-mentioned steps (2) is Fe (NO3)3、Co(NO3)2、Ni(NO3)2、Cu(NO3)2、Zn(NO3)2、Ce(NO3)3、Mn(NO3)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; it is an advantage of the current invention that: the cooking fume remover in the present invention includes Electrostatic unit and catalytic absorption unit; by repeatedly protecting and purify and the method for high-pressure electrostatic coupling and catalyzing; disposable to the oils and fats in soot gas, particulate matter, volatile organic matter, gas with foreign flavor and other harmful gass can reach more than 90% by clearance; achieve efficient, the lasting purification to kitchen fume; purify oil smoke, protect atmospheric environment.Specifically, this cooking fume remover has the advantage that
(1) simple in construction, cost of manufacture is low:
This depurator is the system of a closing, and cooking fume flows transversely through, and internal system part is simple, is not easily blocked, reliable operation, also reduces cost simultaneously.
(2) purification efficiency is high, and equipment resistance is little:
The results showed, the present invention smoke gas purification rate to passing through is more than 90%, and owing to adopting purification way based on collision, Electrostatic, 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 being ionized except for active oxygen atom by the oxygen in air, the main component (harmful gas VOCs and abnormal flavour) in now cooking fume is also made to be energized into upper state, form upper state oil smoke molecule, when the harmful gas VOCs of place's upper state and smell substance enter catalytic absorption purification unit, it can be acted on by catalyst at normal temperatures, reduce energy consumption, enhance the clean-up effect in catalytic absorption unit, if and these harmful gass and smell substance not premenstrual road Electrostatic cell processing, then because being absent from described high activity species and the words making these harmful gass and smell substance be energized into upper state, it cannot be carried out effective catalytic decomposition by catalyst at normal temperatures.
(4) purifier volume is little, compact conformation:
Present configuration is compact, compact, is adapted for mount in conventional home kitchen, it is achieved that the air cleaning of family cooking.
(5) long service life, it is not necessary to often safeguard:
This equipment reliable operation, the non-maintaining cycle is long, and Electrostatic unit can work reliably and with long-term, without special maintenance, in catalytic absorption unit, the catalyst of use is with the honeycomb ceramic plate through special handling for carrier, the active component being catalyst with transition group metallic oxide, durable in use, the life-span is long.
Accompanying drawing explanation
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, the present invention is described in further detail.
Embodiment 1:
nullSuch as Fig. 1、Shown in 2，A kind of compound cooking fume remover with coupling function，Including 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 between air inlet 11 and air outlet 12, form a gas passage，Wherein air inlet 11 and air outlet 12 place are respectively arranged with air intake cover 111 and outlet housing 121，For to 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-sectional expansion of gas channel is square，Simultaneously along air inlet 11 to air outlet 12，Oil smoke separative element 2 is set gradually in gas passage、Electrostatic unit 3 and catalytic absorption unit 4，Soot gas is from air inlet 11，Guide functions through air intake cover 111，Pass sequentially through oil smoke separative element 2、Electrostatic unit 3 and catalytic absorption unit 4，Then through outlet housing 121 and the air outlet 12 that is connected with outlet housing 121，Thus 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) communicated with draw-off tray 6, thus the smoke particle of absorption in oil smoke separative element 2 and Electrostatic unit 3 can be made to be collected in draw-off tray 6 along oil leakaging port under gravity.For convenience of the setting of this cooking fume remover, the two ends of housing 1 bottom are additionally provided with a spike 5.
Oil smoke separative element 2 includes undaform aluminium alloy drainage screen 21, the periphery of drainage screen 21 is coated with metal edge frame 22, metal edge frame 22 is internal arranges multiple staggered filter V-shaped, upper and lower, soot gas is through drainage screen, soot gas air current flow direction is made to change, form turbulent flow and air flow swirl, soot gas molecule and drainage screen can be made fully to collide, farthest remove oarse-grained oil droplet and water droplet in soot gas.Further, drainage screen is drawer-type structure, and drawer-type structure is convenient carries out regular maintenance and replacing to drainage screen；The thickness of drainage screen is 20mm, under the premise ensureing filter effect, can reduce space hold, reduce production cost.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 includes ionized region 31 and trapping district 32, power supply is provided by electronic box 7, wherein ionized region 31 includes energising tungsten filament and many groups the first ground connection pole plate, trapping district includes energising pole plate and many groups the second ground connection pole plate, and this second ground connection pole plate arranges circular hole, circular hole is internally connected with electrical conductor, so that forming voltage between adjacent second ground pole plate, after soot gas enters Electrostatic unit 3, make the particulate matter in soot gas with different electric charges through ionized region 31, when trapping district 32, under the effect of electric field force, the particulate matter with difference electric charge is made to move to the pole plate of opposed polarity respectively, thus reaching the effect of trapping fine particle；Simultaneously, owing to Electrostatic unit has stronger power, the oxygen molecule in partial air is made to ionize as active oxygen atom, single oxygen atom and an oxygen molecule combine, form active specy, such as ozone (O3), but also by the harmful gas VOCs in cooking fume and odor molecules equal excitation to upper state, form upper state cooking fume molecule.Dominant response process is as follows:
1) e+O2→2O+e;(1)
2) O+O2→O3(2)
In the present embodiment, this Electrostatic unit 3 is drawer-type structure, so conveniently this Electrostatic unit 3 is carried out regular maintenance and replacing, and meanwhile, in the present embodiment, the length of ionized region 31 is 30mm, and the spacing between adjacent first ground connection pole plate is 20mm；The length in described trapping district 32 is 250mm, spacing between adjacent second ground pole plate is 20mm, such ionized region 31 can make electric charges different on the particulate matter band in soot gas, and can be sufficiently separated when the particulate matter with difference electric charge arrives trapping district 32, reaches the effect of trapping.
Catalytic absorption unit 4 includes can with the active specy (O of Electrostatic unit 3 release3) 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.Catalytic absorption unit 4 achieves the coupling of " absorption/concentration-catalysis ", specifically: under energy that catalyst provides in the electrostatic place of Electrostatic unit 3 and the ozone isoreactivity species effect of generation, under room temperature, the odor molecules and harmful gas molecule Quick Oxidation that are energized into upper state in soot gas are decomposed, remove the volatile organic matter in oil smoke and gas.Dominant response process is as follows:
Reaction under high-pressure electrostatic:
1) e+O2 → 2O+e;(1)
2) O+O2 → O3(2)
Following reaction is there is further under coupling catalyst effect:
1) O+H2O → 2 OH, (3)
2) HO2+O3 → OH+2O(4)
3) 2 OH+O2 → 2HO2(5)
Catalytic absorption unit 4 mainly includes following functions: 1) catches and concentrates pollutant；2) ozone isoreactivity species and the high-energy molecules that electrostatic field produces is received；3) hydroxyl radical free radical (OH) produced and active oxygen (O-, O2-, O3-) etc., be the innocuous substance such as CO2 and water by oxidation Decomposition such as the volatile organic matter in oil smoke, Hydrocarbon under room temperature.Catalyst can make the abnormal flavour being attracted on carrier and harmful gas constantly decompose or aoxidize and be converted into innocuous substance, avoid absorption saturated after no longer have the shortcoming of clean-up effect, realize permanent using, without the purpose of special maintenance, and catalyst before the reaction after, physics, chemical property are constant, will not be consumed, thus the catalytic capability of self not increase in time and decay.
In the present embodiment, the preparation method of catalyst is:
First, honeycomb ceramic plate pretreatment: by Al2O3Or TiO2Powder body mixes with deionized water, emulsifying 5～10 minutes, forms the suspension that concentration is 0.1～0.6mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, puts into the drying of 100 DEG C of baking oven.
Secondly, prepared by catalyst activity component precursor solution: be dissolved in deionized water by one or more in Fe, Co, Ni, Cu, Zn, Ce, Mn metal nitrate, being sufficiently stirred for formation concentration is the solution of 0.1～1.5mol/L, the adhesive of solution weight 0.3～2.0wt% is added in prepared solution, emulsifying 5～10 minutes, prepares 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, prepare described catalyst.
The preparation method of 2～12 pairs of catalyst is specifically addressed by the examples below:
Embodiment 2:
First by 5.1gAl2O3Mix with 500ml deionized water, emulsifying 5 minutes, form the suspension that concentration is 0.1mol/L, impregnated in above-mentioned suspension by by honeycomb ceramic carrier plate, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Fe(NO of 0.1mol/L3)3Solution adds 5g waterglass, emulsifying 5 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 200 DEG C heat 2 hours, prepare required catalyst, be computed Fe in the catalyst prepared2O3With Al2O3Mass ratio be 12%.
Above-mentioned prepared FeOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 91.8% of the oils and fats in cooking fume, particulate matter removal efficiencies is 95.3%, and volatile organic matter clearance is 22.4%.
Embodiment 3:
First by 20.4gAl2O3Mix with 500ml deionized water, emulsifying 5 minutes, form the suspension that concentration is 0.4mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Co(NO of 0.14mol/L3)2Solution adds 7.5g bentonite, emulsifying 5 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 300 DEG C heat 3 hours, prepare required catalyst, be computed CoO and Al in the catalyst prepared2O3Mass ratio be 2%.
Above-mentioned prepared CoOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 94.2% of the oils and fats in cooking fume, particulate matter removal efficiencies is 98.1%, and volatile organic matter clearance is 32.3%.
Embodiment 4:
First by 30.6gAl2O3Mix with 500ml deionized water, emulsifying 5 minutes, form the suspension that concentration is 0.6mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Ni(NO of 1mol/L3)2Solution adds 10gZSM-5 molecular sieve, emulsifying 5 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 400 DEG C heat 4 hours, prepare required catalyst, be computed NiO and Al in the catalyst prepared2O3Mass ratio be 8%.
Above-mentioned prepared NiOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 94.8% of the oils and fats in cooking fume, particulate matter removal efficiencies is 98.3%, and volatile organic matter clearance is 33.7%.
Embodiment 5:
First by 4gTiO2Mix with 500ml deionized water, emulsifying 5 minutes, form the suspension that concentration is 0.1mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Cu(NO of 1.5mol/L3)2Solution adds 10gZSM-5 molecular sieve, emulsifying 5 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 500 DEG C heat 5 hours, prepare required catalyst, be computed CuO and TiO in the catalyst prepared2Mass ratio be 15%.
Above-mentioned prepared CuOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 92.7% of the oils and fats in cooking fume, particulate matter removal efficiencies is 96.4%, and volatile organic matter clearance is 29.8%.
Embodiment 6:
First by 16gTiO2Mix with 500ml deionized water, emulsifying 10 minutes, form the suspension that concentration is 0.6mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Zn(NO of 1mol/L3)2Solution adds 15gZSM-5 molecular sieve, emulsifying 10 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 600 DEG C heat 6 hours, prepare required catalyst, be computed Zn in the catalyst prepared2O and TiO2Mass ratio be 15%.
Above-mentioned prepared ZnOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 90.9% of the oils and fats in cooking fume, particulate matter removal efficiencies is 93.8%, and volatile organic matter clearance is 40.2%.
Embodiment 7:
First by 24gTiO2Mix with 500ml deionized water, emulsifying 10 minutes, form the suspension that concentration is 0.6mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Ce(NO of 1mol/L3)3Solution adds 10gZSM-5 molecular sieve, emulsifying 10 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 700 DEG C heat 7 hours, prepare required catalyst, be computed Ce in the catalyst prepared2O3With TiO2Mass ratio be 6%.
Above-mentioned prepared CeOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 90.3% of the oils and fats in cooking fume, particulate matter removal efficiencies is 92.1%, and volatile organic matter clearance is 49.7%.
Embodiment 8:
First by 5.1gAl2O3Mix with 500ml deionized water, emulsifying 5 minutes, form the suspension that concentration is 0.1mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Mn(NO of 1mol/L3)2Solution adds 10gZSM-5 molecular sieve, emulsifying 10 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 500 DEG C heat 3 hours, prepare required catalyst, be computed Mn in the catalyst prepared2O and Al2O3Mass ratio be 13%.
Above-mentioned prepared MnOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 97.3% of the oils and fats in cooking fume, particulate matter removal efficiencies is 98.5%, and volatile organic matter clearance is 42.6%.
Embodiment 9:
First by 5.1gAl2O3Mix with 500ml deionized water, emulsifying 5 minutes, form the suspension that concentration is 0.1mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Mn(NO of 1mol/L3)2, Co(NO3)2Mixed solution (mol ratio of two kinds of nitrate is 1:1) adds 10gZSM-5 molecular sieve, emulsifying 10 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 300 DEG C heat 3 hours, prepare required catalyst, be computed Mn in the catalyst prepared2O and CoO and Al2O3Mass ratio be 10%.
Above-mentioned prepared Co-MnOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 98.9% of the oils and fats in cooking fume, particulate matter removal efficiencies is 99.2%, and volatile organic matter clearance is 51.2%.
Embodiment 10:
First by 5.1gAl2O3Mix with 500ml deionized water, emulsifying 5 minutes, form the suspension that concentration is 0.1mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Mn(NO of 1mol/L3)2, Ni(NO3)2Mixed solution (mol ratio of two kinds of nitrate is 1:1) adds 10gZSM-5 molecular sieve, emulsifying 10 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 300 DEG C heat 3 hours, prepare required catalyst, be computed Mn in the catalyst prepared2O, NiO sum and Al2O3Mass ratio be 7%.
Above-mentioned prepared Ni-MnOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 99.2% of the oils and fats in cooking fume, particulate matter removal efficiencies is 99.7%, and volatile organic matter clearance is 53.7%.
Embodiment 11:
First by 5.1gAl2O3Mix with 500ml deionized water, emulsifying 5 minutes, form the suspension that concentration is 0.1mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Mn(NO of 1mol/L3)2, Cu(NO3)2Mixed solution (mol ratio of two kinds of nitrate is 1:1) adds 10gZSM-5 molecular sieve, emulsifying 10 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 400 DEG C heat 3 hours, prepare required catalyst, be computed Mn in the catalyst prepared2O, CuO sum and Al2O3Mass ratio be 8%.
Above-mentioned prepared Cu-MnOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 97.9% of the oils and fats in cooking fume, particulate matter removal efficiencies is 98.8%, and volatile organic matter clearance is 49.3%.
Embodiment 12:
First by 5.1gAl2O3Mix with 500ml deionized water, emulsifying 5 minutes, form the suspension that concentration is 0.1mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Ni(NO of 1mol/L3)2, Cu(NO3)2Mixed solution (mol ratio of two kinds of nitrate is 1:1) adds 10gZSM-5 molecular sieve, emulsifying 10 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 500 DEG C heat 3 hours, prepare required catalyst, be computed in the catalyst prepared NiO, CuO sum and Al2O3Mass ratio be 14%.
Above-mentioned prepared Ni-CuOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 94.6% of the oils and fats in cooking fume, particulate matter removal efficiencies is 97.2%, and volatile organic matter clearance is 41.7%.
Embodiment 13:
First by 5.1gAl2O3Mix with 500ml deionized water, emulsifying 5 minutes, form the suspension that concentration is 0.1mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, put into the drying of 100 DEG C of baking oven.
Then, to 500ml concentration be the Ni(NO of 1mol/L3)2, Co(NO3)2Mixed solution (mol ratio of two kinds of nitrate is 1:1) adds 10gZSM-5 molecular sieve, emulsifying 10 minutes, prepares catalyst activity component presoma.
Finally the honeycomb ceramic plate processed be impregnated in precursor solution, after putting into oven for drying, be placed in Muffle furnace 600 DEG C heat 3 hours, prepare required catalyst, be computed in the catalyst prepared NiO, CoO sum and Al2O3Mass ratio be 12%.
Above-mentioned prepared Ni-CoOx Supported Honeycomb Ceramics type catalyst being placed in catalytic absorption unit 4, opens cooking fume remover, record the disposable removal 97.8% of the oils and fats 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, make soot gas first pass around oil smoke separative element, by changing air current flow direction, form turbulent flow and air flow swirl, make soot gas collide fully, eliminate oarse-grained oil droplet, water droplet in cooking fume.Then, make cooking fume enter Electrostatic unit, make the particulate matter band difference electric charge in cooking fume through ionized region, through trapping district, under the effect of electric field force, make the particulate matter with difference electric charge move to the pole plate of opposed polarity respectively, reach the effect of trapping fine particle；Simultaneously, owing to Electrostatic unit has stronger power, make the oxygen in partial air be ionized and combine into active oxygen atom, single oxygen atom and an oxygen molecule, form ozone, and the harmful gas molecule in cooking fume and odor molecules are energized into upper state.Through the purified treatment of said two units, remove in cooking fume most particulate matters, now cooking fume is mainly composed of harmful gas VOCs and abnormal flavour.The ozone that high-pressure electrostatic produces has certain oxidisability, but independent ozone is very limited to the removal ability of organic pollution and abnormal flavour.In order to promote the removal to harmful gas further, can the catalyst that matches of the energy level of active specy discharged with high-pressure electrostatic by have employed, ozone isoreactivity species can be further converted to hydroxyl radical free radical (OH) contour active specy, decomposing harmful substances then.Therefore in catalytic absorption unit, with the honeycomb ceramic plate through special handling for carrier, the harmful gas in soot gas and abnormal flavour can be carried out efficient absorption and trapping by this carrier；The active specy component being catalyst with transition group metallic oxide, it is carried on honeycomb ceramic plate carrier surface, under the energy of electrostatic field offer and the ozone isoreactivity species effect of generation, abnormal flavour in soot gas and harmful gas Quick Oxidation are decomposed, removes the volatile organic matter in oil smoke and gas.By the purification of above three unit, the cooking fume discharge after process is cleaned harmless more, farthest eliminates the kitchen fume harm on human health and the impact on atmospheric environment.
Claims (12)
1. a compound cooking fume remover with coupling function, including a housing, this housing has an air inlet and an air outlet, and forms a gas passage between this air inlet and air outlet, it is characterised in that:
Along described air inlet to air outlet, Electrostatic unit and catalytic absorption unit is set gradually in described gas passage, described Electrostatic unit includes ionized region and trapping district, catalyst that the energy level of active specy that described catalytic absorption unit includes discharging with above-mentioned Electrostatic unit mesohigh electrostatic matches and the carrier of this catalyst of load, wherein said catalyst includes active component and helper component, this active component is the oxide of transiting group metal elements, and this active component is Fe, Co, Ni, Cu, Zn, one or more in Ce oxide, helper component is Al2O3Or TiO2。
2. the compound cooking fume remover with coupling function as claimed in claim 1, it is characterised in that: the mass ratio of described active component and described helper component is 2～15%.
3. the compound cooking fume remover with coupling function as claimed in claim 1 or 2, it is characterised in that: described carrier is honeycomb ceramic carrier plate.
4. the compound cooking fume remover with coupling function as claimed in claim 3, it is characterized in that: in described gas passage, be additionally provided with the oil smoke separative element being positioned at described Electrostatic unit front, this oil smoke separative element includes drainage screen, and this drainage screen includes multiple upper and lower staggered filter.
5. the compound cooking fume remover with coupling function as claimed in claim 4, it is characterised in that: described filter is V-shaped, arranges a frame in the periphery of filter, thus forming described drainage screen, and described drainage screen is undaform.
6. the compound cooking fume remover with coupling function as claimed in claim 5, it is characterised in that: described drainage screen is drawer-type structure, and the thickness of drainage screen is 10mm～70mm.
7. the compound cooking fume remover with coupling function as claimed in claim 6, it is characterized in that: described Electrostatic unit is drawer-type structure, wherein said ionized region includes energising tungsten filament and many groups the first ground connection pole plate, described trapping district includes energising pole plate and many groups the second ground connection pole plate, and this second ground connection pole plate arranges circular hole, circular hole is internally connected with electrical conductor, so that forming voltage between adjacent second ground pole plate.
8. the compound cooking fume remover with coupling function as claimed in claim 7, it is characterised in that: the length of described ionized region is 20mm～50mm, and the spacing between adjacent first ground connection pole plate is 20mm～80mm；The length in described trapping district is 200mm～500mm, and the spacing between adjacent second ground pole plate is 12mm～25mm.
9. the compound cooking fume remover with coupling function as claimed in claim 8, it is characterized in that: the bottom of described housing is provided with a draw-off tray, and the lower end of described oil smoke separative element and Electrostatic unit is respectively arranged with an oil leakaging port communicated with described draw-off tray.
10. the preparation method of a catalyst as claimed in claim 3, it is characterised in that comprise the following steps:
(1) honeycomb ceramic plate pretreatment: by Al2O3Or TiO2Powder body mixes with deionized water, emulsifying 5～10 minutes, forms the suspension that concentration is 0.1～0.6mol/L, honeycomb ceramic carrier plate be impregnated in above-mentioned suspension, puts into the dry drying of 100 DEG C of baking oven；
(2) prepared by catalyst activity component precursor solution: be dissolved in deionized water by one or more in magnesium-yttrium-transition metal nitrate, being sufficiently stirred for formation concentration is the solution of 0.1～1.5mol/L, the adhesive of this solution quality 0.3-2.0wt% is added in prepared solution, emulsifying 5～10 minutes, prepares catalyst activity component presoma；
(3) catalyst activity component load: impregnated in described precursor solution by honeycomb ceramic plate pretreated for described step (1), dries and is placed in Muffle furnace, and 200～700 DEG C are heated 2～5 hours, prepare described catalyst.
11. the preparation method of catalyst as claimed in claim 10, it is characterised in that: described magnesium-yttrium-transition metal nitrate is Fe (NO3)3、Co(NO3)2、Ni(NO3)2、Cu(NO3)2、Zn(NO3)2、Ce(NO3)3、Mn(NO3)2In one or more.
12. the preparation method of catalyst as claimed in claim 11, it is characterised in that: described adhesive is the one in waterglass, bentonite or ZSM-5 molecular sieve.
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| CN203744346U (en) * | 2014-03-06 | 2014-07-30 | 宁波方太厨具有限公司 | Compound oil smoke purifier with coupling function |
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| CN105987417B (en) * | 2015-03-03 | 2018-12-25 | 陈长春 | A kind of purification system and integrated environment-friendly stove and range hood using purification system |
| CN105135539B (en) * | 2015-07-08 | 2018-07-17 | 宁波方太厨具有限公司 | Family kitchen air purifier |
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| CN110508130A (en) * | 2019-08-30 | 2019-11-29 | 新乐华家用电器(深圳)有限公司 | A kind of device and method of oil smoke removal |
| CN113685949B (en) * | 2021-07-30 | 2022-06-21 | 宁波方太厨具有限公司 | A filtration for air purifier |
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