CN109569295A - A kind of exhaust gas from diesel vehicle treatment fluid process units and technique - Google Patents
A kind of exhaust gas from diesel vehicle treatment fluid process units and technique Download PDFInfo
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- CN109569295A CN109569295A CN201910005614.1A CN201910005614A CN109569295A CN 109569295 A CN109569295 A CN 109569295A CN 201910005614 A CN201910005614 A CN 201910005614A CN 109569295 A CN109569295 A CN 109569295A
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- 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
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- 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
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- Combustion & Propulsion (AREA)
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- Environmental & Geological Engineering (AREA)
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- General Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of exhaust gas from diesel vehicle treatment fluid process units, including urea prepares component, ultrapure water prepares component, material electric hybrid module, adjusts component, control device and power supply；It includes carbon dioxide generating device, ammonium hydroxide feedway and preparation tank that urea, which prepares component,；It includes water source filter device, pure water producing device that ultrapure water, which prepares component,；Control device includes controller and processor；Carbon dioxide generating device and ammonium hydroxide feedway pass through pipeline respectively and connect with preparation tank, water source filter device one end connects external water source, the water source filter device other end and pure water producing device, the water outlet of pure water producing device is connect with material electric hybrid module, is adjusted component and is connect with material electric hybrid module；The configuration of the present invention is simple, preparation efficiency is high, is suitable for large-scale popularization.
Description
Technical field
The present invention relates to vehicle maintenance service technical fields, and in particular to a kind of exhaust gas from diesel vehicle treatment fluid process units and
Technique.
Background technique
As atmosphere pollution is got worse, there is haze weather in many places in China, multiple urban air-qualities substantially under
In the reason of dropping, causing haze weather, the discharge of motor-vehicle tail-gas will averagely account for 20% to 25% or so, and selective catalysis is also
Former (SCR) is that reduction Diesel NOx generally acknowledged at present discharges one of most effective post-processing technology, is also considered as in being best suitable for
State's national conditions, it is able to satisfy one of the post-processing technology of state's IV emission request.Urea SCR is a certain amount of by spraying into exhaust pipe
Aqueous solution of urea, aqueous solution of urea obtain reducing agent NH3 using steaming, pyrolysis and hydrolytic process, and NH3 is under the effect of the catalyst
NOx is reduced into N2 by selectivity, to realize the content for reducing NOx in exhaust.The key of this technology is exactly using automobile-used
Urea liquid converts the unqualified gas reduction in tail gas to the ingredient harmless to atmosphere, but this technology is molten to urea for vehicle
The purity requirement of liquid is very high；With the implementation of state four standard, country is stringenter to the discharge of vehicle exhaust, urea for vehicle
Demand also certainly will be with increase, but the production of domestic urea for vehicle at present is all largely directly to convert pure water with urea granules to mix
It closes and is made, low, small scale that there is operation automations, the discontinuous defect of production.
Existing automobile urea, is to be commonly called as at urea for vehicle, and scientific name is " diesel engine vent gas treatment fluid " production system by water process
Device, the deionized water that satisfactory 67.5 ﹪ is reached after processing, purification is stored by water tank, then again by the height of 32.5 ﹪
Pure urea pass through urea melting tank heating stirring after be delivered to finished pot, be filtered it is rear filling, the disadvantage is that, it is existing
Water treatment facilities is purified using reverse osmosis membrane coagulation, therefore treated that water can only achieve 67.5 ﹪, furthermore water tank
Head design structure is simple, cannot be played and be applied well, and urea melting pot also needs heating rod to pass through electricity when stirring
Source is protruded into urea melting tank and is heated, the disadvantage is that stirring duration, at least more than half an hour, and stirring system is heavy,
Noise is big.
Summary of the invention
For the above technical problems, the diesel oil tailstock that the present invention provides a kind of structures is simple, preparation efficiency is high
Gas disposal liquid process units.
The present invention also provides a kind of exhaust gas from diesel vehicle treatment fluid production technology
The technical solution of the present invention is as follows: a kind of exhaust gas from diesel vehicle treatment fluid process units, including urea prepares component, ultrapure
Water prepares component, material electric hybrid module, adjusts component, control device and power supply；It includes carbon dioxide that urea, which prepares component,
Device, ammonium hydroxide feedway and preparation tank；It includes water source filter device, pure water producing device that ultrapure water, which prepares component,；Control dress
It sets including controller and processor；Carbon dioxide generating device and ammonium hydroxide feedway pass through pipeline respectively and connect with preparation tank,
Water source filter device one end connects external water source, the water source filter device other end and pure water producing device, pure water producing device
Water outlet is connect with material electric hybrid module, is adjusted component and is connect with material electric hybrid module；It is bipolar it is reverse osmosis be first-stage reverse osmosis film
It is constituted with two-pass reverse osmosis film, the water after double-stage reverse osmosis film process enters the super water treatment facilities of EDI by pipeline, passes through
Can reach the standard of medical ultrapure water after above-mentioned Pure water preparation, the super water treatment facilities of EDI by pipeline and water tank head into
The mouth of a river is connected, and water tank is connect by outlet pipeline with inlet pipeline on melting tank, connects between outlet pipeline and inlet pipeline
There is screw-rod air compressor, the head on melting tank is equipped with pulse blender, and melting tank head is reserved with and urea feeding device
The feed inlet of feed duct docking, dissolving pot bottom is 11 installations, has finished product discharge port to connect on filter with bottle placer；It states
The center on water tank head is machined with hole, the sealing of Kong Shangyong lid, and the shape of lid 5-1 is in plum blossom-shaped, surrounds water tank
The circumferential design in hole has priming hole 5-3, and priming hole at least two or more, the adjacent of priming hole is machined with air hole 5-2, breathes freely
Hole 5-2 and each priming hole are independently arranged.
Further, ground water tank is made of nontoxic, colourless plastics, and the center on water tank head is machined with
Hole, the sealing of Kong Shangyong lid, the shape of lid are in plum blossom-shaped, and the circumferential design around water storage pod aperture has priming hole, and priming hole is extremely
Two or more few, the adjacent of priming hole is machined with air hole, and air hole and each priming hole are to be independently arranged, and is higher by storage respectively
The base surface on water pot head.
Further, melting tank is made of stainless steel, and pulse blender is mounted on the head of melting tank, pulse blender
It is that structure is no longer described in detail the prior art herein, the head of melting tank is machined with the water inlet of water inlet pipe, is equipped on water inlet pipe
Open valve, and it is also machined with feed inlet, with lid sealing on feed inlet, the tank body outside of melting tank is equipped with thermometer, melting tank
To be discharge port connect by discharge nozzle with the feed inlet on finished pot for bottom, Open valve is installed on discharge nozzle.
Further, the feed inlet docked with discharge nozzle is machined on finished pot, finished pot is made of stainless steel, finished product
The bottom of tank is machined with finished product discharge port and is connected to the filter by pipeline, is equipped with opening valve on the pipeline of finished product discharge port
Door, filter are docked by discharge port thereon with bottle placer after filtering finished product.
Further, urea feeding device be by discharge port, feed duct, feed bin, feed bin discharge hole, vibrating motor,
Material conveyor and supporting leg are constituted, and feed bin is that square is tapered to be supported by supporting leg, is processed in an inner face of tapered feed bin
There is a feed bin discharge hole, it is to being connected to feed duct, feed duct thereon that feed bin discharge hole, which is across the circular through hole of feed bin,
The other end on connection one bend pipe dock with the feed inlet of melting tank, feed duct be inclination install supporting leg be four, often
It is connected between supporting leg by cross-brace, cross-brace is connected by cross-arm, and material conveyor is fixed on cross-arm, and feeder motor inclines
It is tiltedly fixed on cross-arm, for the other end of material conveyor and feed duct by flanged joint, one of feed bin square is outer
One vibrating motor is installed on wall surface.
A kind of exhaust gas from diesel vehicle treatment fluid production technology, which is characterized in that specifically include that
Step 1: ammonia and carbon dioxide are synthesized, and are obtained mass concentration and are less than or equal to for 80%, contracting, two urine mass percents
0.25% fusing urea；
Step 2: desalted water is refined into wetting system, obtains the Purified Water that resistivity is 18-20M Ω cm；
Step 3: the Purified Water in the fusing urea and S2 in above-mentioned S1 is added simultaneously in 1:1.5 ratio to dosage bunker
It is interior, 30min or more is stirred, the urea liquid that mass concentration is 31.5%~32% is obtained；
Step 4: again by finely tuning the amount of above-mentioned fusing urea or Purified Water, the urine that mass concentration is 32.5% is obtained
Plain solution, the urea liquid of the mass concentration are crude product urea；
Step 5: by crude product urea by the way that urea for vehicle is obtained by filtration；
Step 6: urea for vehicle is delivered in pan tank, and so that urea for vehicle is entered bottle placer by discharge pump, is obtained
Finished product urea for vehicle.
Compared with prior art, beneficial effects of the present invention:
(1) present invention has obtained higher-quality urea for vehicle by using fusing urea as raw material；
(2) preparation process of the invention is simple, compares existing cumbersome technique, has saved the production cost of enterprise；
(3) The present invention reduces the environmental pollution for melting granular urea, fusing urea can not only produce urea for vehicle, also
Fusing urea utilization rate can be improved with coproduction urea, functional urea and melamine etc., provide diversification for enterprise and produce
Product, it is changeable to the wind and cloud in enterprise response market to provide powerful guarantee, it is a low cost, high efficiency, energy saving, high additional
The urea for vehicle production technology of value；
(4) present invention not only reduces the cost of enterprise, reduces carbamide granulation, stacking, transit link, reduces particle urine
Risk when the plain purchasing of raw materials, such as price risk, quality risk.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Wherein, 1- urea prepares component, 10- carbon dioxide generating device, 11- ammonium hydroxide feedway, 12- preparation tank, 2-
Ultrapure water prepares component, the water source 20- filter device, 21- pure water producing device, 3- material electric hybrid module, 4- and adjusts component, 5- control
Device processed, 50- controller, 51 processors.
Specific embodiment
Embodiment: a kind of exhaust gas from diesel vehicle treatment fluid process units as shown in Figure 1, including urea prepare component 1, ultrapure
Water prepares component 2, material electric hybrid module 3, adjusts component 4, control device 5 and power supply；It includes carbon dioxide that urea, which prepares component 1,
Generating device 10, ammonium hydroxide feedway 11 and preparation tank 12；It includes water source filter device 20, pure water system that ultrapure water, which prepares component 2,
Take device 21；Control device 5 includes controller 50 and processor 51；Carbon dioxide generating device 10 and ammonium hydroxide feedway 11 divide
Not Tong Guo pipeline connect with preparation tank 12,20 one end of water source filter device connect external water source, 20 other end of water source filter device
It is connect with the water outlet of pure water producing device 21, pure water producing device 21 with material electric hybrid module 3, adjusts component 4 and material is mixed
Seaming element 3 connects；Bipolar reverse osmosis 21 be that first-stage reverse osmosis film and two-pass reverse osmosis film are constituted, by double-stage reverse osmosis film process
Water afterwards enters the super water treatment facilities 2 of EDI by pipeline, and the standard of medical ultrapure water can be reached after above-mentioned Pure water preparation,
The super water treatment facilities of EDI are connected by pipeline 4 with the water inlet on water tank head, and water tank passes through on outlet pipeline and melting tank
Inlet pipeline connection, is connected with screw-rod air compressor 6, the head on melting tank is equipped with arteries and veins between outlet pipeline and inlet pipeline
Blender 9 is rushed, 8 head of melting tank is reserved with the feed inlet docked with urea feeding device feed duct, and dissolving pot bottom is
1111 install, and have finished product discharge port to connect with bottle placer 12 on filter；The center on water tank head is machined with hole, Kong Shang
It is sealed with lid, the shape of lid 5-1 is in plum blossom-shaped, and the circumferential design around water storage pod aperture has priming hole 5-3, and priming hole is at least
Two or more, the adjacent of priming hole is machined with air hole 5-2, and air hole 5-2 and each priming hole are independently arranged；Ground water tank
It is made of nontoxic, colourless plastics, the center on water tank head is machined with hole, the sealing of Kong Shangyong lid, the shape of lid
Shape is in plum blossom-shaped, and the circumferential design around water storage pod aperture has priming hole, and priming hole at least two or more, the adjacent of priming hole adds
Work has air hole, and air hole and each priming hole are to be independently arranged, and is higher by the base surface on water tank head respectively；Melting tank uses
Stainless steel production, pulse blender are mounted on the head of melting tank, and pulse blender is that structure is no longer detailed herein for the prior art
It states, the head of melting tank is machined with the water inlet of water inlet pipe, Open valve is installed, and be also machined with feed inlet on water inlet pipe,
With lid sealing on feed inlet, thermometer is housed outside the tank body of melting tank, the bottom of melting tank be discharge port by discharge nozzle with
Feed inlet on finished pot connects, and is equipped with Open valve on discharge nozzle；The charging docked with discharge nozzle is machined on finished pot
Mouthful, finished pot is made of stainless steel, and the bottom of finished pot is machined with finished product discharge port and is connected to the filter by pipeline, finished product
Open valve is installed, filter is docked by discharge port thereon with bottle placer after filtering finished product on the pipeline of discharge port；Urine
Plain feeding device is by discharge port, feed duct, feed bin, feed bin discharge hole, vibrating motor, material conveyor and supporting leg structure
At feed bin is that square is tapered to be supported by supporting leg, is machined with feed bin discharge hole in an inner face of tapered feed bin, feed bin goes out
It is to being connected to feed duct thereon that material mouth, which is across the circular through hole of feed bin, and connection one is curved on the other end of feed duct
Pipe is docked with the feed inlet of melting tank, and feed duct is that inclination installation supporting leg is four, by cross-brace between every supporting leg
Connection, cross-brace are connected by cross-arm, and material conveyor is fixed on cross-arm, and feeder motor inclination is fixed on cross-arm, material
Conveyer and the other end of feed duct pass through flanged joint, are equipped with a vibration in an outside wall surface of feed bin square
Motor.
A kind of exhaust gas from diesel vehicle treatment fluid production technology, which is characterized in that specifically include that
Step 1: ammonia and carbon dioxide are synthesized, and are obtained mass concentration and are less than or equal to for 80%, contracting, two urine mass percents
0.25% fusing urea；
Step 2: desalted water is refined into wetting system, obtains the Purified Water that resistivity is 18-20M Ω cm；
Step 3: the Purified Water in the fusing urea and S2 in above-mentioned S1 is added simultaneously in 1:1.5 ratio to dosage bunker
It is interior, 30min or more is stirred, the urea liquid that mass concentration is 31.5%~32% is obtained；
Step 4: again by finely tuning the amount of above-mentioned fusing urea or Purified Water, the urine that mass concentration is 32.5% is obtained
Plain solution, the urea liquid of the mass concentration are crude product urea；
Step 5: by crude product urea by the way that urea for vehicle is obtained by filtration；
Step 6: urea for vehicle is delivered in pan tank, and so that urea for vehicle is entered bottle placer by discharge pump, is obtained
Finished product urea for vehicle.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify to technical solution documented by previous embodiment or equivalent replacement of some of the technical features；And
These are modified or replaceed, and the present invention that it does not separate the essence of the corresponding technical solution applies the spirit and scope of a technical solution.
Claims (7)
1. a kind of exhaust gas from diesel vehicle treatment fluid process units, feature sign is, including urea prepares component (1), ultrapure water system
Slave component (2), adjusts component (4), control device (5) and power supply at material electric hybrid module (3)；The urea prepares component (1) packet
Include carbon dioxide generating device (10), ammonium hydroxide feedway (11) and preparation tank (12)；The ultrapure water prepares component (2)
Water source filter device (20), pure water producing device (21)；The control device (5) includes controller (50) and processor (51)；
The carbon dioxide generating device (10) and ammonium hydroxide feedway (11) are connect by pipeline with preparation tank (12) respectively, the water
Filter device (20) one end in source connects external water source, and water source filter device (20) other end and pure water producing device (21) are described
The water outlet of pure water producing device (21) is connect with the material electric hybrid module (3), and the adjusting component (4) mixes group with material
Part (3) connection；Bipolar reverse osmosis (21) are that first-stage reverse osmosis film and two-pass reverse osmosis film are constituted, by double-stage reverse osmosis film
Treated, and water enters ultrapure water by pipeline prepares component (2), and the ultrapure water prepares component (2) and passes through pipeline (4) and storage
The water inlet on water pot head is connected, and the water tank is connect by outlet pipeline with inlet pipeline on melting tank, the outlet pipe
It being connected between road and inlet pipeline screw-rod air compressor (6), the head on the melting tank is equipped with pulse blender (9),
Melting tank (8) head is reserved with the feed inlet docked with urea feeding device feed duct, dissolves pot bottom installation, mistake
There is finished product discharge port to connect on filter with bottle placer (12)；The center on the water tank head is machined with hole, Kong Shangyong lid
Son sealing, the shape of the lid 5-1 are in plum blossom-shaped, and the circumferential design around water storage pod aperture has priming hole 5-3, and priming hole is at least
Two or more, the adjacent of the priming hole is machined with air hole 5-2, and the air hole 5-2 and each priming hole are independently arranged.
2. exhaust gas from diesel vehicle treatment fluid process units according to claim 1, feature sign is that the water tank uses
Nontoxic, colourless plastics are made, and the center on water tank head is machined with hole, the sealing of Kong Shangyong lid, the shape of the lid
Shape is in plum blossom-shaped, and the circumferential design around water storage pod aperture has a priming hole, priming hole at least two or more, the priming hole it is adjacent
Place is machined with air hole, and the air hole and each priming hole are to be independently arranged, and is higher by the base surface on water tank head respectively.
3. exhaust gas from diesel vehicle treatment fluid process units according to claim 1, feature sign is that the melting tank uses
Stainless steel production, pulse blender are mounted on the head of melting tank, and the pulse blender is that structure is not herein for the prior art
It is described in detail again, the head of melting tank is machined with the water inlet of water inlet pipe, Open valve is equipped on water inlet pipe, and be also machined with charging
Mouthful, it is sealed on feed inlet with lid, thermometer is housed, the bottom of melting tank is that discharge port passes through discharge nozzle outside the tank body of melting tank
It is connect with the feed inlet on finished pot, Open valve is installed on discharge nozzle.
4. exhaust gas from diesel vehicle treatment fluid process units according to claim 1, feature sign is, add on the finished pot
Work has the feed inlet docked with discharge nozzle, and finished pot is made of stainless steel, and it is logical that the bottom of finished pot is machined with finished product discharge port
Cross pipeline to be connected to the filter, Open valve be installed on the pipeline of finished product discharge port, the filter finished product is filtered after by
Discharge port thereon is docked with bottle placer.
5. exhaust gas from diesel vehicle treatment fluid process units according to claim 1, feature sign is, the urea feeding dress
Setting is made of discharge port, feed duct, feed bin, feed bin discharge hole, vibrating motor, material conveyor and supporting leg, the material
Storehouse is that square is tapered to be supported by supporting leg, is machined with feed bin discharge hole in an inner face of tapered feed bin, the feed bin goes out
It is to connect one on the other end of the feed duct to feed duct is connected to thereon that material mouth, which is across the circular through hole of feed bin,
A bend pipe is docked with the feed inlet of melting tank, and feed duct is that install the supporting leg be four for inclination, between every supporting leg by
Cross-brace connection, cross-brace are connected by cross-arm, and material conveyor is fixed on cross-arm, and feeder motor inclination is fixed on cross-arm
On, the other end of material conveyor and feed duct passes through flanged joint, pacifies in an outside wall surface of the feed bin square
Equipped with a vibrating motor.
6. a kind of exhaust gas from diesel vehicle treatment fluid production technology, which is characterized in that specifically include that
Step 1: ammonia and carbon dioxide are synthesized, and are obtained mass concentration and are less than or equal to for 80%, contracting, two urine mass percents
0.25% fusing urea；
Step 2: desalted water is refined into wetting system, obtains the Purified Water that resistivity is 18-20M Ω cm；
Step 3: the Purified Water in the fusing urea and S2 in above-mentioned S1 is added to dosage bunker simultaneously in 1:1.5 ratio, is stirred
30min or more is mixed, the urea liquid that mass concentration is 31.5%~32% is obtained；
Step 4: again by finely tuning the amount of above-mentioned fusing urea or Purified Water, it is molten to obtain the urea that mass concentration is 32.5%
Liquid, the urea liquid of the mass concentration are crude product urea；
Step 5: by the crude product urea by the way that urea for vehicle is obtained by filtration；
Step 6: the urea for vehicle is delivered in pan tank, and so that urea for vehicle is entered bottle placer by discharge pump, is obtained
Finished product urea for vehicle.
7. exhaust gas from diesel vehicle treatment fluid process units according to claim 1, feature sign is, add on the finished pot
Work has the feed inlet docked with discharge nozzle, and finished pot is made of stainless steel, and it is logical that finished product discharge port is machined at the top of finished pot
Cross pipeline to be connected to the filter, Open valve be installed on the pipeline of finished product discharge port, the filter finished product is filtered after by
Discharge port thereon is docked with bottle placer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910005614.1A CN109569295A (en) | 2019-01-03 | 2019-01-03 | A kind of exhaust gas from diesel vehicle treatment fluid process units and technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910005614.1A CN109569295A (en) | 2019-01-03 | 2019-01-03 | A kind of exhaust gas from diesel vehicle treatment fluid process units and technique |
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| CN109569295A true CN109569295A (en) | 2019-04-05 |
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| JP2013142363A (en) * | 2012-01-12 | 2013-07-22 | Isuzu Motors Ltd | Exhaust emission control device of diesel engine |
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| CN104772040A (en) * | 2015-03-19 | 2015-07-15 | 张山 | Vehicle urea liquid formula |
| CN107417576A (en) * | 2017-06-19 | 2017-12-01 | 四川金素环保科技有限公司 | A kind of urea for vehicle preparation method |
| CN107774183A (en) * | 2016-08-31 | 2018-03-09 | 衡水卡力洁环保科技有限公司 | A kind of urea for vehicle production equipment and process |
| CN207533068U (en) * | 2017-11-06 | 2018-06-26 | 河南道骐汽车科技有限公司 | A kind of production system of diesel engine vent gas treatment fluid |
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2019
- 2019-01-03 CN CN201910005614.1A patent/CN109569295A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003039718A1 (en) * | 2001-11-06 | 2003-05-15 | Robert Bosch Gmbh | Method and device for reducing nitrogen oxides present in exhaust gases |
| JP2013142363A (en) * | 2012-01-12 | 2013-07-22 | Isuzu Motors Ltd | Exhaust emission control device of diesel engine |
| CN104772040A (en) * | 2015-03-19 | 2015-07-15 | 张山 | Vehicle urea liquid formula |
| CN104772031A (en) * | 2015-04-14 | 2015-07-15 | 河南心连心化肥有限公司 | Direct vehicle urea solution production device and production method thereof |
| CN107774183A (en) * | 2016-08-31 | 2018-03-09 | 衡水卡力洁环保科技有限公司 | A kind of urea for vehicle production equipment and process |
| CN107417576A (en) * | 2017-06-19 | 2017-12-01 | 四川金素环保科技有限公司 | A kind of urea for vehicle preparation method |
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Application publication date: 20190405 |