CN109113837A - A kind of catalysis treatment method of vehicle exhaust - Google Patents
A kind of catalysis treatment method of vehicle exhaust Download PDFInfo
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- CN109113837A CN109113837A CN201811007999.7A CN201811007999A CN109113837A CN 109113837 A CN109113837 A CN 109113837A CN 201811007999 A CN201811007999 A CN 201811007999A CN 109113837 A CN109113837 A CN 109113837A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with particulate filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/101—Three-way catalysts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The present invention provides a kind of catalysis treatment methods of vehicle exhaust, comprising the following steps: vehicle exhaust is carried out preliminary purification by filtration treatment, removes solid particle；Then catalytic treatment is carried out using three-way catalyst, the pernicious gases such as carbon monoxide, hydrocarbon and the nitrogen oxides of vehicle exhaust discharge is changed into harmless carbon dioxide, water and nitrogen by oxidation and reduction, then carry out alkalinity and absorb sour gas；Then it is dried, carries out ultraviolet ray sterilization bactericidal processing after dry；Adsorpting formulation absorption and activated carbon adsorption are finally carried out, the vehicle exhaust after adsorption treatment is subjected to photocatalysis treatment, is discharged after detection is qualified.The present invention eliminates solid particle in vehicle exhaust, hydrocarbon, carbon monoxide and nitrogen oxides, the discharge amount of noxious pollutant is effectively reduced, meet motor vehicle exhaust emission environmental requirement by carrying out multistep treatment to vehicle exhaust.
Description
Technical field
The present invention relates to purifying vehicle exhaust technical field, specially a kind of catalysis treatment method of vehicle exhaust.
Background technique
With the development of society, automobile becomes the indispensable transport facility of the mankind, also become modern times substance text
One of bright pillar, with the high speed development of automobile industry, automobile bring tail gas pollution problem is increasingly severe.In China
Large- and-medium size cities, motor vehicle exhaust emission have become the main source of atmospheric pollution, reduce motor vehicle exhaust emission pollution and its important.
Vehicle exhaust contains hydrocarbonization as its name suggests, that is, the exhaust gas being discharged from automobile exhaust pipe in vehicle exhaust
It closes object, carbon monoxide, oxynitrides etc. and dysgenic hazardous solid particle, especially doped fuel is generated to human body, it is right
The harm of human body is bigger.Not only smell is strange for vehicle exhaust, but also makes us dizzy, nauseous, influences the health of people.Existing skill
The methods of activated carbon adsorption, catalytic and Alkali absorption are often used in art to handle the nytron in vehicle exhaust
Object, carbon monoxide, nitrogen oxides and solid particle, but existing catalytic performance is bad, stability is poor, and
Existing method cannot thoroughly handle Complicated Automobile tail gas, and treatment effect is undesirable.
Summary of the invention
The purpose of the present invention is to solve the deficiencies of above-mentioned technology, provide a kind of catalysis treatment method of vehicle exhaust,
By using three-way catalyst to carry out catalytic treatment after vehicle exhaust is carried out primary filtration purification, then inhaled by alkaline solution
Receipts, washing, disinfection and sterilization processing and absorption, photocatalysis and carbon dioxide separation, eliminate the nytron in vehicle exhaust
Object, carbon monoxide, nitrogen oxides and solid particle, high treating effect.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of catalysis treatment method of vehicle exhaust, comprising the following steps:
Vehicle exhaust is carried out preliminary purification by step 1 by filtration treatment, and the device of the filtration treatment includes successively
Filter screen, active carbon net and the glass fiber mesh of setting；
Vehicle exhaust after filtration treatment in step 1 is carried out catalytic treatment using three-way catalyst by step 2；
Vehicle exhaust after catalytic treatment in step 2 is carried out alkaline absorption by step 3；
Step 4, by step 3, treated that vehicle exhaust is dried, and carries out ultraviolet ray sterilization bactericidal processing after dry；
Step 5, by step 4, treated that vehicle exhaust successively carries out adsorpting formulation absorption and activated carbon adsorption, will adsorb
Treated, and vehicle exhaust carries out photocatalysis treatment, most discharges after detection is qualified afterwards.
Preferably, three-way catalyst is integral catalyzer in step 2, by immersing honeycomb carbon fibre carrier by oxygen
Change zirconium, the composite coating solution that cerium oxide, lanthanum powder and aluminium oxide are mixed to get and dries calcining and obtain pretreated catalyst, then
Plating palladium is carried out on pretreated catalyst to obtain.
Preferably, three-way catalyst is prepared by the following method:
S1, polyvinyl alcohol and distilled water are weighed and is uniformly mixed, stand 3~5h after at 85~90 DEG C constant temperature stirring 3~
4h obtains the poly-vinyl alcohol solution that mass fraction is 8%~12%, and it is 4% that mass fraction then, which is added, to poly-vinyl alcohol solution
~5% boric acid solution carries out ultrasonic vibration after stirring 0.5~1h, polytetrafluoroethylene (PTFE) cream is added after 0.5~1h of ultrasonic vibration
Liquid stirs 4~6h, obtains the milky white solution that stable, nothing is obviously layered, and obtained milky white solution is carried out Electrospun,
Tunica fibrosa is obtained, by tunica fibrosa in 70~75 DEG C of dry 12~15h, sublevel section calcining is then carried out and obtains cellular porous carbon
Fiber；
S2, zirconium oxide, cerium oxide, lanthanum powder and aluminium oxide are weighed according to 4~8:15~20:2~4:68~79 ratio, it is first
First by zirconium oxide, cerium oxide and lanthanum powder under the revolving speed of 190~200rpm 35~45h of mixing and ball milling, then be added aluminium oxide again
Secondary 25~35h of ball milling, obtains composite powder, composite powder is then configured to slurry, and the porous carbon fiber that S1 is obtained is being starched
3~4min is impregnated in material to obtain in 70~75 DEG C of 1.5~2h of calcining pretreated then in 120~130 DEG C of 3~4h of drying
Catalyst；
S3, catalyst pretreated in S2 is immersed in the palladium chloride ammonia solution that substance withdrawl syndrome is 1~1.5g/L,
And it impregnates 3.5~4h and obtains three-element catalytic in 500~550 DEG C of 2~2.5h of calcining then in 120~130 DEG C of 3~4h of drying
Agent.
Preferably, polyvinyl alcohol, boric acid solution, polytetrafluoroethylsolution solution solid-liquid ratio be 10g:0.03mL:30g.
Preferably, the detailed process of sublevel section calcining are as follows:
Tunica fibrosa is warming up to 280~300 DEG C under air atmosphere with the rate of 3 DEG C/min first, after keeping the temperature 1~1.5h
It is cooling, complete pretreatment；Pretreated tunica fibrosa is warming up to 600~650 DEG C in nitrogen atmosphere with the rate of 5 DEG C/min
Afterwards, then with the rate of 2 DEG C/min 1000~1050 DEG C are warming up to, keep the temperature 1~1.5h, room is finally down to the rate of 8 DEG C/min
Temperature.
Preferably, step 3 neutral and alkali solution is sodium hydroxide solution that mass fraction is 3% and mass fraction is 8%
The mixed liquor of sodium carbonate liquor.
Preferably, in step 5, adsorpting formulation be following parts by weight raw material mixing after made of: 2-5 parts of sodium metasilicate,
12-15 parts of ethylenediamine, 5-10 parts of triethanolamine, 10-13 parts of glycerine, 5-10 parts of vanadic anhydride, 2-7 parts of aluminium polychloride,
3-8 parts of Sodium Polyacrylate, 30-40 parts of bentonite, 1-3 parts of sodium chloride, 50-60 parts of ethylene glycol, 80-95 parts of urea, attapulgite
5-8 parts, 50-80 parts of water.
Preferably, the catalysis treatment method of the vehicle exhaust in the present invention can be applied in being set to automobile exhaust pipeline
Processing unit in, wherein processing unit include be sequentially connected in series coagulation device, two stage treatment device, tertiary treatment dress
Set, level Four processing unit, Pyatyi processing unit and six grades of processing units, coagulation device include the filter screen set gradually,
Active carbon net and glass fiber mesh, two stage treatment device are filled with three-way catalyst, and tertiary treatment device is filled with alkaline solution,
Level Four processing unit is filled with desiccant, and equally distributed annular ultraviolet lamp, Pyatyi processing are additionally provided in level Four processing unit
Device has been sequentially filled adsorpting formulation and active carbon, and six grades of processing units are filled with titanium dioxide optical catalyst.
Compared with prior art, beneficial effects of the present invention are as follows:
1, multistage catalytic processing has been carried out to vehicle exhaust in the present invention, vehicle exhaust is subjected to primary filtration purification first
After remove solid particle, then using three-way catalyst carry out catalytic treatment, by vehicle exhaust discharge carbon monoxide, hydrocarbonization
It closes the pernicious gases such as object and nitrogen oxides and harmless carbon dioxide, water and nitrogen is changed by oxidation and reduction, then
By sour gas such as alkaline solution absorptions such as carbon dioxide, nitrogen dioxide, sulfur dioxide, disinfection and sterilization is handled after drying, then
By medicament absorption, activated carbon adsorption and photocatalysis, the discharge amount of noxious pollutant is effectively reduced, meets motor vehicle exhaust emission ring
Guaranteed request；
2, three-way catalyst preparation method of the invention is simple, excellent catalytic effect, and the adsorption effect of adsorpting formulation is good, can
Further decrease the discharge amount of pollutant.
Specific embodiment
Below by specific embodiment example, the present invention will be described in detail.The scope of the present invention is not limited to the tool
Body embodiment.
Embodiment 1
The catalysis treatment method for present embodiments providing a kind of vehicle exhaust carries out multistep treatment, processing to vehicle exhaust
Thoroughly, the discharge amount of effective pollutant is reduced.Automotive exhaust catalysis processing method provided in this embodiment the following steps are included:
Vehicle exhaust is carried out preliminary filtering and purification by step 1 by filtration treatment, the device of filtration treatment include according to
Filter screen, active carbon net and the glass fiber mesh of secondary setting；
Vehicle exhaust after filtration treatment in step 1 is carried out catalytic treatment using three-way catalyst by step 2；
Step 3, by the vehicle exhaust after catalytic treatment in step 2 using mass fraction be 3% sodium hydroxide solution and
The mixed liquor for the sodium carbonate liquor that mass fraction is 8% is handled；
Step 4, by step 3, treated that vehicle exhaust is dried, and carries out ultraviolet ray sterilization bactericidal processing after dry；
Step 5, by step 4, treated that vehicle exhaust successively carries out adsorpting formulation absorption and activated carbon adsorption, will adsorb
Treated vehicle exhaust carries out photocatalysis treatment by titanium dioxide optical catalyst, most discharges after detection is qualified afterwards.
The wherein preparation process of three-way catalyst are as follows:
S1,10g polyvinyl alcohol and 115g distilled water are weighed and is uniformly mixed, 3h is stood, by the solution after standing in 85 DEG C
Lower constant temperature stirs 3h, obtains the poly-vinyl alcohol solution that mass fraction is 8%, 0.03mL mass then is added to poly-vinyl alcohol solution
The boric acid solution that score is 4% carries out ultrasonic vibration after stirring 0.5h, 30g polytetrafluoroethylene (PTFE) cream is added after ultrasonic vibration 0.5h
Liquid stirs 4h, obtains the milky white solution that stable, nothing is obviously layered, and obtained milky white solution is carried out Electrospun, is obtained
Tunica fibrosa；
S2, the tunica fibrosa for obtaining S1 in 70 DEG C of dry 12h, by the tunica fibrosa after drying in air atmosphere according to 3 DEG C/
The heating rate of min is warming up to 280 DEG C, keeps the temperature cooling after 1h, is pre-processed；By pretreated tunica fibrosa in nitrogen atmosphere
According to the heating rate of 5 DEG C/min be warming up to 600 DEG C, be warming up to 1000 DEG C according still further to the heating rate of 2 DEG C/min, heat preservation
1h is finally down to room temperature with the rate of 8 DEG C/min, obtains cellular porous carbon fiber；
S3, zirconium oxide, cerium oxide, lanthanum powder and aluminium oxide are weighed according to the ratio of 4:15:4:77, first by zirconium oxide, oxygen
Change cerium and lanthanum powder the mixing and ball milling 35h under the revolving speed of 190rpm, aluminium oxide ball milling 25h again is then added, obtains composite powder；
S4, the composite powder for obtaining S3 are configured to slurry, and the porous carbon fiber that S2 is obtained impregnates 3min in the slurry,
Then in 120 DEG C of drying 3h, pretreated catalyst is obtained in 70 DEG C of calcining 1.5h；
S5, catalyst pretreated in S4 is immersed in the palladium chloride ammonia solution that substance withdrawl syndrome is 1g/L, and soaked
It steeps 3.5h and obtains three-way catalyst in 500 DEG C of calcining 2h then in 120 DEG C of drying 3h.
Wherein adsorpting formulation after the raw material mixing of following parts by weight by being made: 2 parts of sodium metasilicate, 12 parts of ethylenediamine, and three ethyl alcohol
10 parts of amine, 10 parts of glycerine, 5 parts of vanadic anhydride, 7 parts of aluminium polychloride, 8 parts of Sodium Polyacrylate, 30 parts of bentonite, sodium chloride
3 parts, 60 parts of ethylene glycol, 80 parts of urea, 8 parts of attapulgite, 50 parts of water.
Embodiment 2
Automotive exhaust catalysis processing method provided in this embodiment the following steps are included:
Vehicle exhaust is carried out preliminary filtering and purification by step 1 by filtration treatment, the device of filtration treatment include according to
Filter screen, active carbon net and the glass fiber mesh of secondary setting；
Vehicle exhaust after filtration treatment in step 1 is carried out catalytic treatment using three-way catalyst by step 2；
Step 3, by the vehicle exhaust after catalytic treatment in step 2 using mass fraction be 3% sodium hydroxide solution and
The mixed liquor for the sodium carbonate liquor that mass fraction is 8% is handled；
Step 4, by step 3, treated that vehicle exhaust is dried, and carries out ultraviolet ray sterilization bactericidal processing after dry；
Step 5, by step 4, treated that vehicle exhaust successively carries out adsorpting formulation absorption and activated carbon adsorption, will adsorb
Treated vehicle exhaust carries out photocatalysis treatment by titanium dioxide optical catalyst, most discharges after detection is qualified afterwards.
The wherein preparation process of three-way catalyst are as follows:
S1,10g polyvinyl alcohol and 101g distilled water are weighed and is uniformly mixed, 3~5h is stood, by the solution after standing in 88
Constant temperature stirs 3.5h at DEG C, obtains the poly-vinyl alcohol solution that mass fraction is 9%, 0.03mL then is added to poly-vinyl alcohol solution
The boric acid solution that mass fraction is 5% carries out ultrasonic vibration after stirring 1h, 30g polytetrafluoroethylene (PTFE) cream is added after ultrasonic vibration 1h
Liquid stirs 5h, obtains the milky white solution that stable, nothing is obviously layered, and obtained milky white solution is carried out Electrospun, is obtained
Tunica fibrosa；
S2, the tunica fibrosa for obtaining S1 are in 70~75 DEG C of dry 12~15h, by the tunica fibrosa after drying in air atmosphere
290 DEG C are warming up to according to the heating rate of 3 DEG C/min, cooling after 1h is kept the temperature, is pre-processed；Pretreated tunica fibrosa is existed
620 DEG C are warming up to according to the heating rate of 5 DEG C/min in nitrogen atmosphere, is warming up to 1000 according still further to the heating rate of 2 DEG C/min
DEG C, 1.5h is kept the temperature, room temperature is finally down to the rate of 8 DEG C/min, obtains cellular porous carbon fiber；
S3, zirconium oxide, cerium oxide, lanthanum powder and aluminium oxide are weighed according to the ratio of 6:18:3:73, first by zirconium oxide, oxygen
Change cerium and lanthanum powder the mixing and ball milling 40h under the revolving speed of 200rpm, aluminium oxide ball milling 30h again is then added, obtains composite powder；
S4, the composite powder for obtaining S3 are configured to slurry, and the porous carbon fiber that S2 is obtained impregnates 4min in the slurry,
Then in 125 DEG C of drying 3.5h, pretreated catalyst is obtained in 75 DEG C of calcining 2h；
S5, catalyst pretreated in S4 is immersed in the palladium chloride ammonia solution that substance withdrawl syndrome is 1.5g/L, and
It impregnates 4h and obtains three-way catalyst in 550 DEG C of calcining .5h then in 125 DEG C of drying 3.5h.
Wherein adsorpting formulation after the raw material mixing of following parts by weight by being made: 5 parts of sodium metasilicate, 15 parts of ethylenediamine, and three ethyl alcohol
5 parts of amine, 13 parts of glycerine, 10 parts of vanadic anhydride, 2 parts of aluminium polychloride, 3 parts of Sodium Polyacrylate, 40 parts of bentonite, sodium chloride
1 part, 50 parts of ethylene glycol, 95 parts of urea, 5 parts of attapulgite, 80 parts of water.
Embodiment 3
Automotive exhaust catalysis processing method provided in this embodiment the following steps are included:
Vehicle exhaust is carried out preliminary filtering and purification by step 1 by filtration treatment, the device of filtration treatment include according to
Filter screen, active carbon net and the glass fiber mesh of secondary setting；
Vehicle exhaust after filtration treatment in step 1 is carried out catalytic treatment using three-way catalyst by step 2；
Step 3, by the vehicle exhaust after catalytic treatment in step 2 using mass fraction be 3% sodium hydroxide solution and
The mixed liquor for the sodium carbonate liquor that mass fraction is 8% is handled；
Step 4, by step 3, treated that vehicle exhaust is dried, and carries out ultraviolet ray sterilization bactericidal processing after dry；
Step 5, by step 4, treated that vehicle exhaust successively carries out adsorpting formulation absorption and activated carbon adsorption, will adsorb
Treated vehicle exhaust carries out photocatalysis treatment by titanium dioxide optical catalyst, most discharges after detection is qualified afterwards.
The wherein preparation process of three-way catalyst are as follows:
S1,10g polyvinyl alcohol and 90g distilled water are weighed and is uniformly mixed, 4h is stood, by the solution after standing at 90 DEG C
Constant temperature stirs 4h, obtains the poly-vinyl alcohol solution that mass fraction is 10%, 0.03mL mass then is added to poly-vinyl alcohol solution
The boric acid solution that score is 5% carries out ultrasonic vibration after stirring 1h, 30g ptfe emulsion is added after ultrasonic vibration 1h, stirs
6h is mixed, the milky white solution that stable, nothing is obviously layered is obtained, obtained milky white solution is subjected to Electrospun, obtains fiber
Film；
S2, the tunica fibrosa for obtaining S1 in 75 DEG C of dry 15h, by dry tunica fibrosa in air atmosphere according to 3 DEG C/
The heating rate of min is warming up to 300 DEG C, keeps the temperature cooling after 1.5h, is pre-processed；By pretreated tunica fibrosa in nitrogen atmosphere
650 DEG C are warming up to according to the heating rate of 5 DEG C/min in enclosing, is warming up to 1050 DEG C according still further to the heating rate of 2 DEG C/min, heat preservation
1.5h is finally down to room temperature with the rate of 8 DEG C/min, obtains cellular porous carbon fiber；
S3, zirconium oxide, cerium oxide, lanthanum powder and aluminium oxide are weighed according to the ratio of 8:15:2:75, first by zirconium oxide, oxygen
Change cerium and lanthanum powder the mixing and ball milling 45h under the revolving speed of 200rpm, aluminium oxide ball milling 35h again is then added, obtains composite powder；
S4, the composite powder for obtaining S3 are configured to slurry, and the porous carbon fiber that S2 is obtained impregnates 4min in the slurry,
Then in 130 DEG C of drying 4h, pretreated catalyst is obtained in 75 DEG C of calcining 2h；
S5, catalyst pretreated in S4 is immersed in the palladium chloride ammonia solution that substance withdrawl syndrome is 1.5g/L, and
It impregnates 4h and obtains three-way catalyst in 550 DEG C of calcining 2.5h then in 130 DEG C of drying 4h.
Wherein adsorpting formulation after the raw material mixing of following parts by weight by being made: 2.5 parts of sodium metasilicate, 13.5 parts of ethylenediamine, and three
7.5 parts of ethanol amine, 11.5 parts of glycerine, 7.5 parts of vanadic anhydride, 4.5 parts of aluminium polychloride, 5.5 parts of Sodium Polyacrylate, swelling
35 parts, 2 parts of sodium chloride, 55 parts of ethylene glycol, 85 parts of urea, 6.5 parts of attapulgite, 65 parts of water of soil.
Embodiment 4
Automotive exhaust catalysis processing method provided in this embodiment the following steps are included:
Vehicle exhaust is carried out preliminary filtering and purification by step 1 by filtration treatment, the device of filtration treatment include according to
Filter screen, active carbon net and the glass fiber mesh of secondary setting；
Vehicle exhaust after filtration treatment in step 1 is carried out catalytic treatment using three-way catalyst by step 2；
Step 3, by the vehicle exhaust after catalytic treatment in step 2 using mass fraction be 3% sodium hydroxide solution and
The mixed liquor for the sodium carbonate liquor that mass fraction is 8% is handled；
Step 4, by step 3, treated that vehicle exhaust is dried, and carries out ultraviolet ray sterilization bactericidal processing after dry；
Step 5, by step 4, treated that vehicle exhaust successively carries out adsorpting formulation absorption and activated carbon adsorption, will adsorb
Treated vehicle exhaust carries out photocatalysis treatment by titanium dioxide optical catalyst, most discharges after detection is qualified afterwards.
The wherein preparation process of three-way catalyst are as follows:
S1,10g polyvinyl alcohol and 81g distilled water are weighed and is uniformly mixed, 4h is stood, by the solution after standing at 90 DEG C
Constant temperature stirs 4h, obtains the poly-vinyl alcohol solution that mass fraction is 11%, 0.03mL mass then is added to poly-vinyl alcohol solution
The boric acid solution that score is 4.5% carries out ultrasonic vibration after stirring 0.5h, 30g polytetrafluoroethylene (PTFE) is added after ultrasonic vibration 0.5h
Lotion stirs 5h, obtains the milky white solution that stable, nothing is obviously layered, and obtained milky white solution is carried out Electrospun, is obtained
To tunica fibrosa；
S2, the tunica fibrosa for obtaining S1 in 75 DEG C of dry 15h, by the tunica fibrosa after drying in air atmosphere according to 3 DEG C/
The heating rate of min is warming up to 300 DEG C, keeps the temperature cooling after 1.5h, is pre-processed；By pretreated tunica fibrosa in nitrogen atmosphere
650 DEG C are warming up to according to the heating rate of 5 DEG C/min in enclosing, is warming up to 1050 DEG C according still further to the heating rate of 2 DEG C/min, heat preservation
1.5h is finally down to room temperature with the rate of 8 DEG C/min, obtains cellular porous carbon fiber；
S3, zirconium oxide, cerium oxide, lanthanum powder and aluminium oxide are weighed according to the ratio of 8:20:4:68, first by zirconium oxide, oxygen
Change cerium and lanthanum powder the mixing and ball milling 40h under the revolving speed of 200rpm, aluminium oxide ball milling 30h again is then added, obtains composite powder；
S4, the composite powder for obtaining S3 are configured to slurry, and the porous carbon fiber that S2 is obtained impregnates 4min in the slurry,
Then in 130 DEG C of drying 4h, pretreated catalyst is obtained in 75 DEG C of calcining 2h；
S5, catalyst pretreated in S4 is immersed in the palladium chloride ammonia solution that substance withdrawl syndrome is 1.5g/L, and
It impregnates 4h and obtains three-way catalyst in 550 DEG C of calcining 2.5h then in 130 DEG C of drying 4h.
Wherein adsorpting formulation after the raw material mixing of following parts by weight by being made: 2.5 parts of sodium metasilicate, 13.5 parts of ethylenediamine, and three
7.5 parts of ethanol amine, 11.5 parts of glycerine, 7.5 parts of vanadic anhydride, 4.5 parts of aluminium polychloride, 5.5 parts of Sodium Polyacrylate, swelling
35 parts, 2 parts of sodium chloride, 55 parts of ethylene glycol, 85 parts of urea, 6.5 parts of attapulgite, 65 parts of water of soil.
Embodiment 5
Automotive exhaust catalysis processing method provided in this embodiment the following steps are included:
Vehicle exhaust is carried out preliminary filtering and purification by step 1 by filtration treatment, the device of filtration treatment include according to
Filter screen, active carbon net and the glass fiber mesh of secondary setting；
Vehicle exhaust after filtration treatment in step 1 is carried out catalytic treatment using three-way catalyst by step 2；
Step 3, by the vehicle exhaust after catalytic treatment in step 2 using mass fraction be 3% sodium hydroxide solution and
The mixed liquor for the sodium carbonate liquor that mass fraction is 8% is handled；
Step 4, by step 3, treated that vehicle exhaust is dried, and carries out ultraviolet ray sterilization bactericidal processing after dry；
Step 5, by step 4, treated that vehicle exhaust successively carries out adsorpting formulation absorption and activated carbon adsorption, will adsorb
Treated vehicle exhaust carries out photocatalysis treatment by titanium dioxide optical catalyst, most discharges after detection is qualified afterwards.
The wherein preparation process of three-way catalyst are as follows:
S1,10g polyvinyl alcohol and 73g distilled water are weighed and is uniformly mixed, 5h is stood, by the solution after standing at 90 DEG C
Constant temperature stirs 4h, obtains the poly-vinyl alcohol solution that mass fraction is 12%, 0.03mL mass then is added to poly-vinyl alcohol solution
The boric acid solution that score is 5% carries out ultrasonic vibration after stirring 1h, 30g ptfe emulsion is added after ultrasonic vibration 1h, stirs
6h is mixed, the milky white solution that stable, nothing is obviously layered is obtained, obtained milky white solution is subjected to Electrospun, obtains fiber
Film；
S2, the tunica fibrosa for obtaining S1 in 75 DEG C of dry 15h, by the tunica fibrosa after drying in air atmosphere according to 3 DEG C/
The heating rate of min is warming up to 300 DEG C, keeps the temperature cooling after 1.5h, is pre-processed；By pretreated tunica fibrosa in nitrogen atmosphere
650 DEG C are warming up to according to the heating rate of 5 DEG C/min in enclosing, is warming up to 1000 DEG C according still further to the heating rate of 2 DEG C/min, heat preservation
1h is finally down to room temperature with the rate of 8 DEG C/min, obtains cellular porous carbon fiber；
S3, zirconium oxide, cerium oxide, lanthanum powder and aluminium oxide are weighed according to the ratio of 4:15:2:79, first by zirconium oxide, oxygen
Change cerium and lanthanum powder the mixing and ball milling 45h under the revolving speed of 200rpm, aluminium oxide ball milling 35h again is then added, obtains composite powder；
S4, the composite powder for obtaining S3 are configured to slurry, and the porous carbon fiber that S2 is obtained impregnates 4min in the slurry,
Then in 130 DEG C of drying 4h, pretreated catalyst is obtained in 75 DEG C of calcining 2h；
S5, catalyst pretreated in S4 is immersed in the palladium chloride ammonia solution that substance withdrawl syndrome is 1.5g/L, and
It impregnates 4h and obtains three-way catalyst in 550 DEG C of calcining 2.5h then in 130 DEG C of drying 4h.
Wherein adsorpting formulation after the raw material mixing of following parts by weight by being made: 2.5 parts of sodium metasilicate, 13.5 parts of ethylenediamine, and three
7.5 parts of ethanol amine, 11.5 parts of glycerine, 7.5 parts of vanadic anhydride, 4.5 parts of aluminium polychloride, 5.5 parts of Sodium Polyacrylate, swelling
35 parts, 2 parts of sodium chloride, 55 parts of ethylene glycol, 85 parts of urea, 6.5 parts of attapulgite, 65 parts of water of soil.
By taking embodiment 1 as an example, the automotive exhaust catalysis processing method that embodiment 1 provides is applied and can be set to by we
In processing unit in automobile exhaust pipeline, detailed process is as follows: the installation process device first in the exhaust pipe of automobile,
Middle processing unit include the coagulation device being sequentially connected in series, two stage treatment device, tertiary treatment device, level Four processing unit,
Pyatyi processing unit and six grades of processing units, coagulation device include the filter screen, active carbon net and glass fibers set gradually
Net is tieed up, two stage treatment device is filled with the three-way catalyst that embodiment 1 provides, and tertiary treatment device is provided filled with embodiment 1
Alkaline solution, level Four processing unit is filled with desiccant, while being additionally provided with equally distributed annular in level Four processing unit
Ultraviolet lamp, Pyatyi processing unit are sequentially filled the adsorpting formulation and active carbon of the offer of embodiment 1, six grades of processing unit fillings
There is titanium dioxide optical catalyst, vehicle exhaust is directly entered coagulation device, carries out preliminary filtering and purification, removes solid
Particle etc., then the vehicle exhaust after coagulation enters the two stage treatment of the three-way catalyst provided filled with embodiment 1
Catalytic treatment is carried out in device, and the pernicious gases such as carbon monoxide, hydrocarbon and the nitrogen oxides of vehicle exhaust discharge are led to
Peroxidating and reduction are changed into harmless carbon dioxide, water and nitrogen, and the vehicle exhaust after two stage treatment enters three-level
Alkaline absorption processing, the sour gas quilts such as carbon dioxide, nitrogen dioxide, sulfur dioxide in vehicle exhaust are carried out in processing unit
Remove, the vehicle exhaust after tertiary treatment proceed in level Four processing unit be dried and ultraviolet ray sterilization bactericidal processing,
Level Four treated vehicle exhaust enters Pyatyi processing unit carries out adsorption treatment, treated that vehicle exhaust proceeds to for Pyatyi
Carry out photocatalysis treatment in six grades of processing units, six grades treated that vehicle exhaust can be expelled directly out.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of catalysis treatment method of vehicle exhaust, which comprises the following steps:
Vehicle exhaust is carried out preliminary purification by step 1 by filtration treatment, and the device of the filtration treatment includes setting gradually
Filter screen, active carbon net and glass fiber mesh；
Vehicle exhaust after filtration treatment in step 1 is carried out catalytic treatment using three-way catalyst by step 2；
Vehicle exhaust after catalytic treatment in step 2 is carried out alkaline absorption by step 3；
Step 4, by step 3, treated that vehicle exhaust is dried, and carries out ultraviolet ray sterilization bactericidal processing after dry；
Step 5, by step 4, treated that vehicle exhaust successively carries out adsorpting formulation absorption and activated carbon adsorption, by adsorption treatment
Vehicle exhaust afterwards carries out photocatalysis treatment, most discharges after detection is qualified afterwards.
2. a kind of catalysis treatment method of vehicle exhaust as described in claim 1, which is characterized in that ternary in the step 2
Catalyst is integral catalyzer, is mixed by immersing honeycomb carbon fibre carrier by zirconium oxide, cerium oxide, lanthanum powder and aluminium oxide
It closes obtained composite coating solution and dries calcining and obtain pretreated catalyst, then carry out plating palladium on pretreated catalyst
It obtains.
3. a kind of catalysis treatment method of vehicle exhaust as claimed in claim 2, which is characterized in that the three-way catalyst is logical
Cross following methods preparation:
S1, polyvinyl alcohol and distilled water are weighed and is uniformly mixed, constant temperature stirs 3~4h at 85~90 DEG C after 3~5h of standing, obtains
The poly-vinyl alcohol solution for being 8%~12% to mass fraction, it is 4%~5% that mass fraction then, which is added, to poly-vinyl alcohol solution
Boric acid solution, stir 0.5~1h after carry out ultrasonic vibration, ptfe emulsion is added after 0.5~1h of ultrasonic vibration, stir
4~6h, obtains the milky white solution that stable, nothing is obviously layered, and obtained milky white solution is carried out Electrospun, obtains fiber
Then film carries out sublevel section calcining and obtains cellular porous carbon fiber by tunica fibrosa in 70~75 DEG C of dry 12~15h；
S2, zirconium oxide, cerium oxide, lanthanum powder and aluminium oxide are weighed according to 4~8:15~20:2~4:68~79 ratio, first will
Then aluminium oxide ball again is added in zirconium oxide, cerium oxide and lanthanum powder 35~45h of mixing and ball milling under the revolving speed of 190~200rpm
25~35h is ground, composite powder is obtained, composite powder is then configured to slurry, the porous carbon fiber that S1 is obtained is in the slurry
It impregnates 3~4min and obtains pretreated catalysis in 70~75 DEG C of 1.5~2h of calcining then in 120~130 DEG C of 3~4h of drying
Agent；
S3, catalyst pretreated in S2 is immersed in the palladium chloride ammonia solution that substance withdrawl syndrome is 1~1.5g/L, and soaked
It steeps 3.5~4h and obtains three-way catalyst in 500~550 DEG C of 2~2.5h of calcining then in 120~130 DEG C of 3~4h of drying.
4. a kind of catalysis treatment method of vehicle exhaust as claimed in claim 3, which is characterized in that in S1, polyvinyl alcohol, boron
Acid solution, polytetrafluoroethylsolution solution solid-liquid ratio be 10g:0.03mL:30g.
5. a kind of catalysis treatment method of vehicle exhaust as claimed in claim 3, which is characterized in that in S1, sublevel section calcining
Detailed process are as follows:
Tunica fibrosa is warming up to 280~300 DEG C under air atmosphere with the rate of 3 DEG C/min first, is kept the temperature cold after 1~1.5h
But, pretreatment is completed；Pretreated tunica fibrosa is warming up to 600~650 DEG C in nitrogen atmosphere with the rate of 5 DEG C/min
Afterwards, then with the rate of 2 DEG C/min 1000~1050 DEG C are warming up to, keep the temperature 1~1.5h, room is finally down to the rate of 8 DEG C/min
Temperature.
6. a kind of catalysis treatment method of vehicle exhaust as described in claim 1, which is characterized in that step 3 neutral and alkali
The mixed liquor for the sodium carbonate liquor that solution is the sodium hydroxide solution that mass fraction is 3% and mass fraction is 8%.
7. a kind of catalysis treatment method of vehicle exhaust as described in claim 1, which is characterized in that in the step 5, absorption
Medicament be following parts by weight raw material mixing after made of: 2-5 parts of sodium metasilicate, 12-15 parts of ethylenediamine, triethanolamine 5-10
Part, 10-13 parts of glycerine, 5-10 parts of vanadic anhydride, 2-7 parts of aluminium polychloride, 3-8 parts of Sodium Polyacrylate, bentonite 30-40
Part, 1-3 parts of sodium chloride, 50-60 parts of ethylene glycol, 80-95 parts of urea, 5-8 parts of attapulgite, 50-80 parts of water.
8. a kind of catalysis treatment method of vehicle exhaust as described in claim 1, which is characterized in that the vehicle exhaust is urged
Changing processing method can apply in the processing unit being set in automobile exhaust pipeline, and the processing unit includes being sequentially connected in series
Coagulation device, two stage treatment device, tertiary treatment device, level Four processing unit, Pyatyi processing unit and six grades processing
Device, the coagulation device include the filter screen, active carbon net and glass fiber mesh set gradually, the two stage treatment dress
It sets filled with the three-way catalyst, the tertiary treatment device is filled with the alkaline solution, and the level Four processing unit is filled out
Filled with desiccant, be additionally provided with equally distributed annular ultraviolet lamp in the level Four processing unit, the Pyatyi processing unit according to
Secondary to be filled with adsorpting formulation and active carbon, six grades of processing units are filled with titanium dioxide optical catalyst.
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| CN110513176A (en) * | 2019-08-27 | 2019-11-29 | 南京正森环保科技有限公司 | A kind of heavy-duty diesel vehicle exhaust gas cleaner |
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