CN112316723A - Automobile urea solution for efficiently solving crystallization blockage - Google Patents
Automobile urea solution for efficiently solving crystallization blockage Download PDFInfo
- Publication number
- CN112316723A CN112316723A CN202011272410.3A CN202011272410A CN112316723A CN 112316723 A CN112316723 A CN 112316723A CN 202011272410 A CN202011272410 A CN 202011272410A CN 112316723 A CN112316723 A CN 112316723A
- Authority
- CN
- China
- Prior art keywords
- urea
- parts
- solution
- reactor
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004202 carbamide Substances 0.000 title claims abstract description 91
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 238000002425 crystallisation Methods 0.000 title claims abstract description 22
- 230000008025 crystallization Effects 0.000 title claims abstract description 22
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000003197 catalytic effect Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 12
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000012498 ultrapure water Substances 0.000 claims abstract description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- -1 alkyl glucoside Chemical class 0.000 claims abstract description 6
- 229930182478 glucoside Natural products 0.000 claims abstract description 6
- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229940083037 simethicone Drugs 0.000 claims abstract description 5
- 229910021642 ultra pure water Inorganic materials 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 37
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 16
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 11
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 239000012047 saturated solution Substances 0.000 claims description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000004071 soot Substances 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 claims description 4
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims description 4
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims 1
- 239000000779 smoke Substances 0.000 abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 13
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- 230000002528 anti-freeze Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000010705 motor oil Substances 0.000 description 4
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 208000019693 Lung disease Diseases 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Inorganic materials O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/85—Chromium, molybdenum or tungsten
- B01J23/888—Tungsten
-
- B01J35/23—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
- B01J37/088—Decomposition of a metal salt
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
- C07C273/04—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
- C07C273/14—Separation; Purification; Stabilisation; Use of additives
- C07C273/16—Separation; Purification
-
- 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
- F01N3/2066—Selective catalytic reduction [SCR]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
Abstract
The invention discloses a vehicle urea solution for efficiently solving crystallization blockage, which is characterized by comprising the following components in parts by weight: 13-14 parts of urea, 5-6 parts of ethanolamine, 4-5 parts of simethicone, 4-6 parts of glycerol, 0.5-1.5 parts of alkyl glucoside,100 parts of ultrapure water, 0.6-0.7 part of carbon smoke catalytic material and 3.5-4.5 parts of silicon type antifreezing solution. To solve the existing urea NOXThe tail gas emission is not up to standard due to the crystallization blockage and the high solidification point.
Description
Technical Field
The invention relates to the technical field of production of automobile urea solution, in particular to automobile urea solution for efficiently solving crystallization blockage.
Background
High-purity urea solution suitable for SCR (selective catalytic reduction) system of vehicle ureaUnder the condition of high temperature (above 300 ℃), the urea solution is firstly decomposed into ammonia gas, and at the high temperature, the urea solution is gasified and then decomposed to generate NH3In the presence of a catalyst, NH3With NO in the exhaust gasXReaction to produce harmless H2O and N2。
However, the urea of the diesel engine for vehicles is decomposed into NH3Production of intermediate product NO in the processx，NOxIs a general term for all nitrogen oxides, the harm to human health is great, NOxThe harm of the formed secondary pollutant ozone to the human respiratory system is also obvious, because the particulate matter is suspended in the air, the lung and heart diseases can be caused, and the carcinogenic probability is increased. NOxComprises urea biuret, cyanuric acid, melamine and the like,
the undecomposed urea, cyanuric acid, melamine and the like are deposited and attached to an exhaust pipeline, a mixer and an SCR catalyst for a long time, so that the original gas fluency is influenced, and the SCR system is blocked.
"ZL 201710409586.0" discloses a urea solution for diesel vehicles with low temperature performance; the automobile urea solution has a lower freezing point than that of common automobile urea, although the damage to the automobile caused by the solidification of the urea solution at low temperature is solved; however, this urea has poor dispersibility, so that NO is producedxThe conversion rate is low, the discharged particles are adhered to the smoke exhaust pipe, and the technical problem of urea blockage cannot be solved in the using process.
Disclosure of Invention
The invention aims to solve the technical problem of providing a vehicle urea solution for efficiently solving the problem of crystal blockage so as to solve the problem of the existing urea NOXThe tail gas emission is not up to standard due to the crystallization blockage and the high solidification point.
In order to solve the technical problems, the invention adopts the following technical scheme:
a vehicle urea solution for efficiently solving crystallization blockage is designed, and comprises the following components in parts by weight: 13-14 parts of urea, 5-6 parts of ethanolamine, 4-5 parts of simethicone, 4-6 parts of glycerol, 0.5-1.5 parts of alkyl glucoside, 100 parts of ultrapure water, 0.6-0.7 part of soot catalytic material and 3.5-4.5 parts of silicon antifreezing solution.
Preferably, the soot catalytic material is prepared as follows:
1) taking La (NO)3) 3•6H2O、KNO3、Co(NO3) 3•6H2O and Ni (NO)3) 3•6H2O, ammonium metavanadate and citric acid, preparing a solution with the mass fraction of 0.9-1.0% by using deionized water, adding 0.45-0.50% of sodium metaaluminate according to the mass of the solution, and adding nanoscale WO in the stirring process3/TiO2Performing ultrasonic oscillation on the mixture powder for 20-45 min, putting the mixture powder into an electric furnace, roasting the mixture powder for 1.5-2 hours at the temperature of 550-560 ℃, and naturally cooling the mixture powder to room temperature;
2) putting the substance obtained in the step 1) into 650-680 ℃, heating for 20-30 minutes, and naturally cooling to room temperature, wherein the weight ratio of the substance to the substance is 1: 3 addition of V2O5。
Preferably, the preparation of urea comprises the following steps:
1) reacting high-purity ammonia and carbon dioxide at high temperature and high pressure in a first reactor and a second reactor; collecting and compressing the gas in the second reactor, then passing the gas through the first reactor again, and collecting the liquid urea melt fluid in the first reactor and the second reactor;
2) flash evaporating liquid urea melt under reduced pressure to remove ammonia and CO2Adding high-purity water with the temperature of 75-80 ℃ and uniformly mixing to obtain a urea saturated solution, collecting gas subjected to flash evaporation treatment and introducing the gas into the first reactor;
3) filtering the urea aqueous solution obtained in the step 2) by using a filter membrane with the aperture of 0.2-0.5 mu m;
4) putting the urea saturated solution obtained in the step 3) into a multistage liquid film crystallization kettle to obtain urea crystals.
Preferably, in the step 1), the pressure in the first reactor is controlled to be 1.55-1.80 Mpa, and the temperature is controlled to be 175-200 ℃; the pressure in the second reactor is controlled to be 0.2-0.50 Mpa, and the temperature is controlled to be 100-110 ℃.
Preferably, in step 2), the ammonium carbamate is gradually decomposed in the liquid urea melt under the conditions of heat supply, reduced pressure and flash evaporation.
Preferably, in the step 2), the reduced pressure condition is controlled to be 0.10 to 14 MPa.
Preferably, in the step 4), the multistage liquid film crystallization kettle comprises 3 cold sections with gradually reduced temperatures, the temperature difference of each cold section is at least 10 ℃, and the temperature difference between the urea saturated solution and the first cold section is 30-50 ℃.
Preferably, in step 4), the filtrates from the crystallization kettles are collected separately and introduced into the crystallization kettle of the next stage.
Compared with the prior art, the invention has the beneficial technical effects that:
the alkyl glucoside has excellent dispersion and diffusion characteristics, and can improve the dispersibility of urea, thereby promoting the decomposition of the urea to generate more NH3Increase of NOxThe conversion of (a); under the heating condition, the urea is promoted to decompose to generate ammonia gas, and the ammonia gas is decomposed at high temperature to generate ammonia gas which has a synergistic effect with the ammonia gas generated by the decomposition of the urea, so that the conversion rate of the catalytic reduction of the nitrogen oxide is greatly improved.
The soot catalytic material and the silicon type antifreeze solution added in the invention can effectively reduce the melting point of urea and improve NOXThe conversion rate of the urea can effectively reduce the problem of heavy metal environmental pollution of the urea for vehicles and improve the efficiency of degrading and absorbing nitrogen oxides of the urea for vehicles; and simultaneously, under the combined action of the carbon smoke catalytic material and the silicon type antifreezing solution, the problem of crystallization blockage is solved. NO of the urea for vehicles of the present inventionxThe conversion rate is more than 96.8 percent, the obtained automobile urea effectively degrades nitrogen oxides, and the problem that an SCR system is easy to block is solved; the emission of the automobile exhaust meets the national IV emission standard requirement.
Preferably, V is added into the carbon smoke catalytic material2O5And TiO2In TiO2Into which WO is introduced3/MoO3Can increase the pore diameter of the inner pores formed between the particles, thereby promoting the dispersion of the active components and increasing the contact between the catalyst and the ureaArea, increase NOxThe conversion of (a).
Preferably, the invention adopts a first reactor and a second reactor, and the arrangement of the two reactors helps to improve the reaction rate.
Preferably, the present invention provides that the liquid urea melt stream is subjected to a gradual decomposition of ammonium carbamate under heat supply and reduced pressure conditions under reduced pressure conditions, thereby increasing the purity of the produced urea.
Detailed Description
The following examples are given to illustrate specific embodiments of the present invention, but are not intended to limit the scope of the present invention in any way. The instruments and devices referred to in the following examples are conventional instruments and devices unless otherwise specified; the raw materials are all conventional commercial industrial raw materials if not specifically indicated; the processing and manufacturing methods are conventional methods unless otherwise specified.
Example 1: a vehicle urea solution for efficiently solving crystallization blockage comprises the following components, by weight, 13 parts of urea, 5 parts of ethanolamine, 5 parts of simethicone, 6 parts of glycerol, 0.5 part of alkyl glucoside, 100 parts of ultrapure water, 0.6 part of carbon smoke catalytic material and 3.5 parts of silicon type antifreeze solution; the preparation method of the soot catalytic material comprises the following steps:
1) taking La (NO)3) 3•6H2O、KNO3、Co(NO3) 36H 2O and Ni (NO)3) 3•6H2Preparing 0.9 mass percent solution from O, ammonium metavanadate and citric acid by using deionized water, adding 0.45-0.50 mass percent of sodium metaaluminate according to the mass of the solution, adding nanoscale WO3/TiO2 mixture powder in the stirring process, performing ultrasonic oscillation for 20min, placing the mixture into a temperature-controlled electric furnace, roasting the mixture at the high temperature of 550 ℃ for 1.5 hours, and naturally cooling the mixture to the room temperature;
2) heating the substance obtained in the step 1) at 680 ℃ for 30 minutes, naturally cooling to room temperature, and mixing the substances according to a weight ratio of 1: 3 addition of V2O5。
Wherein, La (NO)3) 3•6H2O、KNO3、Co(NO3) 36H 2O and Ni (NO)3) 3•6H2The mass ratio of O, ammonium metavanadate and citric acid is 1: 1-2: 1.5-2: 2: 4: 3.
the preparation method of the urea in the vehicle urea solution for efficiently solving the crystallization blockage comprises the following steps:
1) passing high purity ammonia and carbon dioxide through a first reactor, a second reactor at elevated temperature and pressure; collecting and compressing the gas in the second reactor, then passing the gas through the first reactor again, and collecting the liquid urea melt fluid in the first reactor and the second reactor; controlling the pressure in the first reactor to be 1.55-1.80 Mpa and the temperature to be 175-200 ℃; the pressure in the second reactor is controlled to be 0.2-0.50 Mpa, and the temperature is controlled to be 100-110 DEG C
2) Flash evaporating liquid urea melt under reduced pressure to remove ammonia and CO2Adding high-purity water with the temperature of 78 ℃ and uniformly mixing to obtain a urea saturated solution, collecting gas subjected to flash evaporation treatment and introducing the gas into the first reactor; the obtained liquid urea melt is placed under the conditions of heat supply, pressure reduction and flash evaporation to gradually decompose ammonium carbamate, and the pressure reduction condition is controlled to be 14 MPa;
3) filtering the urea aqueous solution obtained in the step 2) by using a filter membrane with the aperture of 0.2 mu m;
4) putting the urea saturated solution obtained in the step 3) into a multistage liquid film crystallization kettle, and adding the obtained urea crystal into deionized water for dissolving; wherein the multistage liquid film crystallization kettle comprises 3 cold sections with gradually reduced temperature, the temperature of the first cold section is 60 ℃, the temperature of the second cold section is 30 ℃, and the temperature of the third cold section is 5 ℃.
The urea production capacity of the invention is up to 2016MTD urea, the utilization rate of NOx conversion rate can reach 97.3%, and the urea does not crystallize at minus 40 ℃.
1. The urea for the present invention was tested at low temperature:
the engine is normally started at the temperature of more than-30 ℃ of the environment, the cooling liquid is introduced into a unfreezing pipeline of the urea box for unfreezing after the temperature of the cooling liquid of the engine is raised to 70 ℃, when the temperature of the urea solution reaches-5 ℃, the SCR system starts to normally inject urea, and the SCR system is not in fault after being processed during the unfreezing period. Tests prove that the vehicle runs normally in suburbs, the vehicle speed is 60km/h, the unfreezing time is about 45 minutes, the SCR works normally, and the SCR can meet the requirements under the condition that the freezing point is-35 ℃ urea.
2. The urea for the present invention was tested at high temperature:
under the full-load state of the whole vehicle, the accelerator is the largest on a continuous uphill road section, the vehicle speed is maintained within the range of 75-85 km/h, the gear is adjusted according to the road condition to increase the rotating speed of the engine, and the temperature of the antifreeze and the engine oil is observed.
Running at 6 grades, wherein the highest temperature of the antifreeze is 85 ℃ and the temperature of the engine oil is 102 ℃; and 5, running at the gear, wherein the highest temperature of the antifreeze is 80 ℃ and the highest temperature of the engine oil is 111 ℃. The temperature of the antifreeze and the temperature of the engine oil both meet the use requirements under the high-temperature condition.
3. Smoke intensity optimization
The air input in plateau areas is low, and visible smoke is easier to appear in tail gas. And at each altitude, the engine works at each gear, the accelerator is stepped to the bottom to work at the maximum oil quantity, and the tail gas condition of the exhaust pipe is observed. Blue smoke is not allowed to appear, the altitude is more than 3000m, and a small amount of black smoke is allowed to appear in quick acceleration; above the altitude of 4000m, dynamic behavior is prioritized.
Example 2: the difference from example 1 is that:
a vehicle urea solution for efficiently solving crystallization blockage comprises the following components in parts by weight: 14 parts of urea, 5 parts of ethanolamine, 5 parts of simethicone, 5 parts of glycerol, 0.5 part of alkyl glucoside, 100 parts of ultrapure water, 0.7 part of carbon smoke catalytic material and 4.5 parts of silicon type antifreeze solution.
The urea production capacity of the invention is as high as 2019MTD urea, the utilization rate of NOx conversion rate can reach more than 96.9%, and the urea is not crystallized at minus 40 ℃. SCR works normally, and the SCR can meet the requirement under the condition that the freezing point is urea at minus 35 ℃.
Example 3: the difference from example 1 is that: the preparation method of the soot catalytic material comprises the following steps:
1) taking La (NO)3) 3•6H2O、KNO3、Co(NO3) 36H 2O and Ni (NO)3) 3•6H2Preparing a solution with the mass fraction of 1.0% by using deionized water, adding 0.50% of sodium metaaluminate according to the mass of the solution, adding nanoscale WO3/TiO2 mixture powder in the stirring process, performing ultrasonic oscillation for 30min, placing the mixture into a temperature-controlled electric furnace, roasting the mixture at the high temperature of 560 ℃ for 1.5 hours, and naturally cooling the mixture to the room temperature;
2) heating the substance obtained in the step 1) at 680 ℃ for 30 minutes, naturally cooling to room temperature, and mixing the substances according to a weight ratio of 1: 3 addition of V2O5。
The urea production capacity of the invention is up to 2003MTD urea, the utilization rate of NOx conversion rate can reach more than 96.8%, and the urea is not crystallized at minus 40 ℃.
Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes in the specific parameters of the embodiments may be made without departing from the spirit of the present invention, and a plurality of specific embodiments are formed, which are common variations of the present invention, and will not be described in detail herein.
Claims (8)
1. The vehicle urea solution for efficiently solving the problem of crystallization blockage is characterized by comprising the following components in parts by weight: 13-14 parts of urea, 5-6 parts of ethanolamine, 4-5 parts of simethicone, 4-6 parts of glycerol, 0.5-1.5 parts of alkyl glucoside, 100 parts of ultrapure water, 0.6-0.7 part of soot catalytic material and 3.5-4.5 parts of silicon antifreezing solution.
2. The vehicle urea solution for efficiently solving the crystal blockage problem according to claim 1, wherein the soot catalytic material is prepared by the following method:
1) taking La (NO)3) 3•6H2O、KNO3、Co(NO3) 3•6H2O and Ni (NO)3) 3•6H2O, ammonium metavanadate and citric acid, preparing a solution with the mass fraction of 0.9-1.0% by using deionized water, adding 0.45-0.50% of sodium metaaluminate according to the mass of the solution, and adding nanoscale WO in the stirring process3/TiO2Performing ultrasonic oscillation on the mixture powder for 20-45 min, putting the mixture powder into an electric furnace, roasting the mixture powder for 1.5-2 hours at the temperature of 550-560 ℃, and naturally cooling the mixture powder to room temperature;
2) putting the substance obtained in the step 1) into 650-680 ℃, heating for 20-30 minutes, and naturally cooling to room temperature, wherein the weight ratio of the substance to the substance is 1: 3 addition of V2O5。
3. The vehicular urea solution for efficiently solving the crystal blockage according to claim 1, wherein the preparation of the urea comprises the following steps:
1) reacting high-purity ammonia and carbon dioxide at high temperature and high pressure in a first reactor and a second reactor; collecting and compressing the gas in the second reactor, then passing the gas through the first reactor again, and collecting the liquid urea melt fluid in the first reactor and the second reactor;
2) flash evaporating liquid urea melt under reduced pressure to remove ammonia and CO2Adding high-purity water with the temperature of 75-80 ℃ and uniformly mixing to obtain a urea saturated solution, collecting gas subjected to flash evaporation treatment and introducing the gas into the first reactor;
3) filtering the urea aqueous solution obtained in the step 2) by using a filter membrane with the aperture of 0.2-0.5 mu m;
4) putting the urea saturated solution obtained in the step 3) into a multistage liquid film crystallization kettle to obtain urea crystals.
4. The vehicular urea solution for efficiently solving the crystal blockage according to claim 3, characterized in that: in the step 1), the pressure in the first reactor is controlled to be 1.55-1.80 Mpa, and the temperature is controlled to be 175-200 ℃; the pressure in the second reactor is controlled to be 0.2-0.50 Mpa, and the temperature is controlled to be 100-110 ℃.
5. The vehicular urea solution for efficiently solving the crystal blockage according to claim 3, characterized in that: in step 2), the ammonium carbamate is gradually decomposed in the liquid urea melt under the conditions of heat supply, reduced pressure and flash evaporation.
6. The vehicular urea solution for efficiently solving the crystal blockage according to claim 3, characterized in that: in the step 2), the decompression condition is controlled to be 0.10-14 MPa.
7. The vehicular urea solution for efficiently solving the crystal blockage according to claim 3, characterized in that: in the step 4), the multistage liquid film crystallization kettle comprises 3 cold sections with gradually reduced temperatures, the temperature difference of each cold section is at least 10 ℃, and the temperature difference between the urea saturated solution and the first cold section is 30-50 ℃.
8. The vehicular urea solution with high efficiency for solving the crystal blockage according to claim 3, wherein in the step 4), the filtered liquid from the crystallization kettle is collected respectively and introduced into the crystallization kettle of the next stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011272410.3A CN112316723A (en) | 2020-11-13 | 2020-11-13 | Automobile urea solution for efficiently solving crystallization blockage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011272410.3A CN112316723A (en) | 2020-11-13 | 2020-11-13 | Automobile urea solution for efficiently solving crystallization blockage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112316723A true CN112316723A (en) | 2021-02-05 |
Family
ID=74318216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011272410.3A Pending CN112316723A (en) | 2020-11-13 | 2020-11-13 | Automobile urea solution for efficiently solving crystallization blockage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112316723A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115006991A (en) * | 2022-05-23 | 2022-09-06 | 陕西一山环保科技有限公司 | High-conversion-rate vehicle urea solution and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018597A (en) * | 2004-07-14 | 2007-08-15 | 伊顿公司 | Hybrid catalyst system for exhaust emissions reduction |
| EP2153880A1 (en) * | 2008-07-31 | 2010-02-17 | Urea Casale S.A. | Process and plant for the production of a urea solution for use in SCR process for reduction of Nox |
| EP2189217A1 (en) * | 2008-11-17 | 2010-05-26 | Technical University of Denmark | Nanoparticular metal oxide/anatase catalysts. |
| CN102099328A (en) * | 2008-05-19 | 2011-06-15 | 斯塔米卡邦有限公司 | Process for the production of urea from ammonia and carbon dioxide |
| CN102584635A (en) * | 2012-01-09 | 2012-07-18 | 四川泸天化股份有限公司 | Preparation method for urea for vehicle |
| CN104772040A (en) * | 2015-03-19 | 2015-07-15 | 张山 | Vehicle urea liquid formula |
| CN107261844A (en) * | 2017-08-08 | 2017-10-20 | 山西思淼环保技术开发有限公司 | A kind of production technology of the urea for vehicle containing nm-class catalyst |
| CN108499360A (en) * | 2018-04-14 | 2018-09-07 | 长沙小新新能源科技有限公司 | A kind of urea for vehicle and preparation method thereof containing catalyst |
| CN110339866A (en) * | 2019-07-14 | 2019-10-18 | 茌平县鲁华工贸有限公司 | A kind of urea for vehicle production catalyst and its production technology |
-
2020
- 2020-11-13 CN CN202011272410.3A patent/CN112316723A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018597A (en) * | 2004-07-14 | 2007-08-15 | 伊顿公司 | Hybrid catalyst system for exhaust emissions reduction |
| CN102099328A (en) * | 2008-05-19 | 2011-06-15 | 斯塔米卡邦有限公司 | Process for the production of urea from ammonia and carbon dioxide |
| EP2153880A1 (en) * | 2008-07-31 | 2010-02-17 | Urea Casale S.A. | Process and plant for the production of a urea solution for use in SCR process for reduction of Nox |
| EP2189217A1 (en) * | 2008-11-17 | 2010-05-26 | Technical University of Denmark | Nanoparticular metal oxide/anatase catalysts. |
| CN102584635A (en) * | 2012-01-09 | 2012-07-18 | 四川泸天化股份有限公司 | Preparation method for urea for vehicle |
| CN104772040A (en) * | 2015-03-19 | 2015-07-15 | 张山 | Vehicle urea liquid formula |
| CN107261844A (en) * | 2017-08-08 | 2017-10-20 | 山西思淼环保技术开发有限公司 | A kind of production technology of the urea for vehicle containing nm-class catalyst |
| CN108499360A (en) * | 2018-04-14 | 2018-09-07 | 长沙小新新能源科技有限公司 | A kind of urea for vehicle and preparation method thereof containing catalyst |
| CN110339866A (en) * | 2019-07-14 | 2019-10-18 | 茌平县鲁华工贸有限公司 | A kind of urea for vehicle production catalyst and its production technology |
Non-Patent Citations (1)
| Title |
|---|
| 贡长生: "《现代工业化学》", 30 June 2008, 华中科技大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115006991A (en) * | 2022-05-23 | 2022-09-06 | 陕西一山环保科技有限公司 | High-conversion-rate vehicle urea solution and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105107514B (en) | A kind of non-vanadium denitration preformed catalyst of honeycomb, preparation method and its usage | |
| CN107261844B (en) | Production process of vehicle urea containing nano-scale catalyst | |
| CN102806011A (en) | Method for preparing automobile urea liquid reducing agent | |
| DE102008040708A1 (en) | Antifreeze urea solution for urea-based SCR system and urea-based SCR system using the same | |
| CN102580531B (en) | Low temperature-resistant tail gas catalytic reduction agent and preparation method thereof | |
| CN108499360A (en) | A kind of urea for vehicle and preparation method thereof containing catalyst | |
| CN112316723A (en) | Automobile urea solution for efficiently solving crystallization blockage | |
| CN105312083B (en) | CHA type sial phosphorus molecular sieve and its preparation method and application | |
| CN103949154A (en) | Automobile exhaust emission purification treatment fluid | |
| CN203584530U (en) | Static mixing system for SCR (Selective Catalytic Reduction) post-treatment system | |
| WO2018080007A1 (en) | Preparation method for removing triuret causing turbidity in urea water | |
| CN107051204B (en) | A kind of preparation process of urea for vehicle solution | |
| CN112110835A (en) | Automobile urea capable of preventing urea biuret, cyanuric acid and melamine intermediate products from being generated and preparation method thereof | |
| CN112090277A (en) | Production process of vehicle urea containing nano-scale catalyst | |
| CN105964143A (en) | Diesel engine tail gas treatment agent | |
| CN105688669A (en) | Comb-shaped polyacrylamide crystal growth disrupting agent, crystallization-resistant type tail gas catalytic reducing agent prepared from disrupting agent and preparation method | |
| CN112090279B (en) | Vehicle urea capable of degrading nitrogen oxide and preventing low-temperature crystallization | |
| CN115318303B (en) | Catalyst for removing soot particles of diesel vehicle at low temperature and preparation method thereof | |
| KR101616669B1 (en) | Nitrogen oxide reduction catalyst and method of manufacturing the same | |
| CN115999362A (en) | Production process of urea solution for vehicles | |
| CN111111407A (en) | Production process of urea solution for vehicles | |
| CN106669669B (en) | A kind of low-load amount noble metal type soot combustion catalyst and its preparation method and application | |
| CN112316722A (en) | Preparation method of antifreezing quality-guaranteeing type automobile urea solution added with multiple active agents | |
| CN108126743A (en) | SAPO-18 adulterates the preparation method and application of Cu and Tb composite catalysts | |
| CN106824192A (en) | A kind of carbon-smoke combustion CuO catalyst of high activity and its preparation method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210205 |
|
| RJ01 | Rejection of invention patent application after publication |