CN105749577B - Produce the coil pipe crystallizer of urea for vehicle - Google Patents
Produce the coil pipe crystallizer of urea for vehicle Download PDFInfo
- Publication number
- CN105749577B CN105749577B CN201610307284.8A CN201610307284A CN105749577B CN 105749577 B CN105749577 B CN 105749577B CN 201610307284 A CN201610307284 A CN 201610307284A CN 105749577 B CN105749577 B CN 105749577B
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- China
- Prior art keywords
- crystallization kettle
- coil pipe
- urea
- pump
- inlet
- 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.)
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000004202 carbamide Substances 0.000 title claims abstract description 57
- 238000002425 crystallisation Methods 0.000 claims abstract description 82
- 230000008025 crystallization Effects 0.000 claims abstract description 77
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 53
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 52
- 210000002700 urine Anatomy 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000007921 spray Substances 0.000 claims description 42
- 239000002826 coolant Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000012267 brine Substances 0.000 claims description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 16
- 239000012295 chemical reaction liquid Substances 0.000 description 12
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 150000003672 ureas Chemical class 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0004—Crystallisation cooling by heat exchange
- B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D2009/0086—Processes or apparatus therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a kind of coil pipe crystallizers producing urea for vehicle, including urine synthesis tank, delivery pump, crystallization kettle, vacuum pump, surge tank and circulating pump；Inlet is equipped with above the crystallization kettle, bottom is equipped with liquid outlet and products export；Surge tank, vacuum pump and the crystallization kettle is sequentially connected, and makes to form vacuum in crystallization kettle；The input port of the delivery pump is connect with urine synthesis tank, and the delivery outlet of delivery pump and the inlet of crystallization kettle connect；The input port of the circulating pump and the liquid outlet of crystallization kettle connect, and the delivery outlet of circulating pump is connect with urine synthesis tank；The crystallization kettle is additionally provided with coil pipe.The present invention directly uses urea synthesis solution obtained by the reaction in urine synthesis tank, is crystallized under vacuum conditions, simplifies technological process, reduce production cost, energy continuous production high-volume, the urea for vehicle of high-purity, energy conservation and environmental protection have preferable economic benefit and social benefit.
Description
Technical field
The invention belongs to produce urea for vehicle technical field, it is related to a kind of coil pipe crystallizer producing urea for vehicle.
Background technology
According to the regulation of National Environmental Protection Agency, the heavy-duty diesel vehicle of sale was intended to reach IV row of state from 1 day July in 2013
Standard is put, compared with state Ⅲ emission standard, discharged nitrous oxides discharge in the state IV of heavy-duty diesel oil automobile reduces 30% or so,
Grain object（PM）Discharge reduces 80% or more.In order to reduce nitrogen oxides and particulate matter in exhaust gas from diesel vehicle discharge.Currently, Europe
The car manufactures of the country such as U.S. generally use selective catalytic reduction（SCR）Technical finesse exhaust gas from diesel vehicle, makes up to Europe
V, the even higher discharge standard in Europe VI.
Exhaust gas from diesel vehicle treatment fluid is cooperation SCR technology, is harmless nitrogen by the conversion of nitrogen oxides in motor exhaust
The reducing agent of gas and water, the primary raw material of exhaust gas from diesel vehicle treatment fluid are urea for vehicle and water, and urea for vehicle is not common agriculture
Industry urea or industrial urea, nor chemical analysis reagent, but it is a kind of there is certain added value, can large-scale industrial production
Specialty chemicals.Urea for vehicle operation principle is that urea for vehicle is added to SCR system, in the high temperature environment（Temperature is higher than 300
℃）, urea resolves into ammonia, and along with the effect of catalyst, the nitrogen oxides in tail gas, which can be reacted with ammonia rapidly, generates nitrogen
Gas and water.The delivery temperature of diesel engine is generally 300-500 DEG C, meets nitrogen oxides and restores required heat.
Currently, the main flow of urea production is ammonia and carbon dioxide, react generation urea synthesizing under certain condition anti-
Liquid, urea synthesis reaction liquid is answered to obtain solid urea using processes such as flush distillation, double evaporation-cooling, granulations.However, automobile-used urine
The purity requirement of element is very high, and commercially available industrial or agriculture urea granules, can not be direct since the magazines content such as biuret is higher
Be used to prepare urea for vehicle solution, it is necessary to make urea synthesis reaction liquid pass through repeatedly crystallize it is miscellaneous to reduce biuret in urea etc.
Matter content.
Invention content
The present invention provides a kind of equipment is simple, floor space is small, improves the production urea for vehicle of the purification efficiency of urea
Coil pipe crystallizer.
In order to achieve the above-mentioned object of the invention, technical scheme is as follows：
A kind of coil pipe crystallizer producing urea for vehicle, including it is urine synthesis tank, delivery pump, crystallization kettle, vacuum pump, slow
Rush tank and circulating pump；Inlet is equipped with above the crystallization kettle, bottom is equipped with liquid outlet and products export；The buffering
Tank, vacuum pump and crystallization kettle are sequentially connected, and make to form vacuum in crystallization kettle；The input port of the delivery pump and urine synthesis tank
Connection, the delivery outlet of delivery pump and the inlet of crystallization kettle connect；The input port of the circulating pump and the liquid outlet of crystallization kettle
Connection, the delivery outlet of circulating pump are connect with urine synthesis tank；The crystallization kettle is additionally provided with coil pipe.
It spirals as a further improvement, the coil pipe described in the above is pipe, is mounted on the middle and lower part of crystallization kettle；
The internal diameter for the annulus that the coil pipe upper end is formed is more than the internal diameter for the annulus that lower end is formed, and is back taper；The coil pipe is simultaneously
And equipped with cooling medium inlet and cooling media outlet.
As a further improvement, being additionally provided with spray thrower in above-described crystallization kettle；The spray thrower includes spray tube
And spray head；The spray tube is connect by pipeline with circulating pump；The spray head is uniformly arranged on spray tube；It is described
Spray tube be arranged in the top of coil pipe.
As a further improvement, being passed through cooling medium in above-described coil pipe；The cooling medium be cool brine or
Person's cold water.
As a further improvement, the top of above-described crystallization kettle is equipped with inlet tube and rotary nozzle；The feed liquor
One end of pipe and the inlet of crystallization kettle connect, and the other end is connect with rotary nozzle.
As a further improvement, the bottom of above-described crystallization kettle is back taper.
In use, urea synthesis solution obtained by the reaction is entered by delivery pump in vacuum state in urine synthesis tank
In crystallization kettle, cooling medium and is passed through into coil pipe as crystalline carrier using coil pipe in crystallization kettle so that urea synthesis solution into
Row crystallisation by cooling purifies, and opens the valve of circulating pump and urine synthesis tank unicom, unsaturated urea reaction liquid is delivered to urine
It is reacted again in liquid synthesis tank；So be recycled to the urea reaction liquid that saturation is fully obtained by the reaction after, close circulating pump and
The valve of urine synthesis tank unicom opens the valve being connect with the spray tube in crystallization kettle, with the urea reaction liquid of saturation to disk
Obtained product spray washing is crystallized on pipe, improves the purity of product.
Compared with the prior art, the present invention has the advantage that and has the beneficial effect that：
1, the present invention is directly crystallized using urea synthesis solution obtained by the reaction in urine synthesis tank, and urea conjunction is utilized
At the high feature of the temperature of liquid, it is not necessarily to additional heat, reduces the generation of biuret；And in vacuum environment, urea synthesis solution
In high-temperature water can rapid vaporization, therefore have part water and be evaporated from urea synthesis solution, improve urea synthesis solution
Concentration improves the productivity of product, ensure that the quality of product.
2, crystallization kettle of the invention using coil pipe as crystalline carrier so that urea synthesis solution under vacuum with cooling
Medium carries out heat exchange, and crystallisation by cooling improves production efficiency；Meanwhile crystalline solid is suspended on coil pipe tube wall, in brilliant, liquid two
When phase separation, the high liquid of impurity content is thoroughly discharged, improves purification rate.
3, the coil pipe that the present invention is equipped with is arranged in back taper in crystallization kettle, increases the crystallization area of urea synthesis solution, side
Just discharging is rinsed when spray washing, improves production efficiency.
4, it is equipped with spray thrower in the crystallization kettle in the present invention, the reaction solution on crystal column surface and crystallization kettle remnants can be sprayed
Elution is washed, and impurity content is reduced, and improves product quality.
5, the present invention is equipped with circulating pump, and unsaturated urea synthesis solution can be delivered to again in urea synthesizing tank and is carried out again
Secondary response saves raw material, reduces production cost.
Urea synthesis solution, can fully be scattered in crystallization kettle and react by the 6, rotary nozzle that the present invention is equipped with, and react
Area is wide, improves the homogeneity of product quality, while improving crystalline rate.
7, the configuration of the present invention is simple is reasonable, simplifies technological process, reduces production cost, can continuous production high-volume,
The urea for vehicle of high-purity, energy conservation and environmental protection have preferable economic benefit and social benefit.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Attached drawing identifies：
1- urine synthesis tanks, 2- delivery pumps, 3- crystallization kettles, 4- inlet tubes, 5- rotary nozzles, 6- surge tanks, 7- vacuum
Pump-, 8- spray heads, 9- coil pipes, 10- circulating pumps, 11- spray tubes.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment 1：
A kind of coil pipe crystallizer producing urea for vehicle, including urine synthesis tank 1, delivery pump 2, crystallization kettle 3, vacuum pump
7, surge tank 6 and circulating pump 10.3 top of crystallization kettle is equipped with inlet, and bottom is equipped with liquid outlet and products export.The buffering
Tank 6, vacuum pump 7 and crystallization kettle 3 are sequentially connected, and make to form vacuum in crystallization kettle 3.The input port of the delivery pump 2 and urine
Synthesis tank 1 connects, and the delivery outlet of delivery pump 2 is connect with the inlet of crystallization kettle 3.The input port of the circulating pump 10 and crystallization
The liquid outlet of kettle 3 connects, and the delivery outlet of circulating pump 10 is connect with urine synthesis tank 1；The crystallization kettle 3 is additionally provided with coil pipe 9.
The coil pipe 9 is that pipe spirals, and is mounted on the middle and lower part of crystallization kettle 3；What the coil pipe upper end was formed
The internal diameter of annulus is more than the internal diameter for the annulus that lower end is formed, i.e. coil pipe 9 is in back taper.The coil pipe 9 and it is situated between equipped with cooling
Matter entrance and cooling media outlet.It is passed through cooling medium in the coil pipe 9；The cooling medium is cool brine.
In use, urea synthesis solution obtained by the reaction is entered by delivery pump 2 in vacuum state in urine synthesis tank 1
Crystallization kettle 3 in, crystalline carrier is used as using coil pipe 9 in crystallization kettle 3, and is passed through cooling medium into coil pipe 9 so that urea closes
Crystallisation by cooling purification is carried out at liquid, the valve of circulating pump 10 and 1 unicom of urine synthesis tank is opened, by unsaturated urea reaction liquid
It is delivered in urine synthesis tank 1 and is reacted again, obtain the urea product of high-purity.
Embodiment 2：
A kind of coil pipe crystallizer producing urea for vehicle, including urine synthesis tank 1, delivery pump 2, crystallization kettle 3, vacuum pump
7, surge tank 6 and circulating pump 10.3 top of crystallization kettle is equipped with inlet, and bottom is equipped with liquid outlet and products export.The buffering
Tank 6, vacuum pump 7 and crystallization kettle 3 are sequentially connected, and make to form vacuum in crystallization kettle 3.The input port of the delivery pump 2 and urine
Synthesis tank 1 connects, and the delivery outlet of delivery pump 2 is connect with the inlet of crystallization kettle 3.The input port of the circulating pump 10 and crystallization
The liquid outlet of kettle 3 connects, and the delivery outlet of circulating pump 10 is connect with urine synthesis tank 1；The crystallization kettle 3 is additionally provided with coil pipe 9.
The coil pipe 9 is that pipe spirals, and is mounted on the middle and lower part of crystallization kettle 3；What the coil pipe upper end was formed
The internal diameter of annulus is more than the internal diameter for the annulus that lower end is formed, i.e. coil pipe 9 is in back taper.The coil pipe 9 and it is situated between equipped with cooling
Matter entrance and cooling media outlet.Cooling medium is passed through in the coil pipe 9, cooling medium is cold water.In the crystallization kettle 3
It is additionally provided with spray thrower, the spray thrower includes spray tube 11 and spray head 8；The spray tube 11 passes through pipeline and circulating pump
10 connections；The spray head 8 is uniformly arranged on spray tube 11；The spray tube 11 is arranged in the top of coil pipe 9.
In use, urea synthesis solution obtained by the reaction is entered by delivery pump 2 in vacuum state in urine synthesis tank 1
Crystallization kettle 3 in, crystalline carrier is used as using coil pipe 9 in crystallization kettle 3, and is passed through cooling medium into coil pipe 9 so that urea closes
Crystallisation by cooling purification is carried out at liquid, the valve of circulating pump 10 and 1 unicom of urine synthesis tank is opened, by unsaturated urea reaction liquid
It is delivered in urine synthesis tank 1 and is reacted again, after being so recycled to the urea reaction liquid that saturation is fully obtained by the reaction, closed
The valve of circulating pump 10 and 1 unicom of urine synthesis tank opens the valve being connect with the spray tube 11 in crystallization kettle 3, with saturation
Urea reaction liquid obtains the urea product of high-purity to crystallizing obtained product spray washing on coil pipe 9.
Embodiment 3：
A kind of coil pipe crystallizer producing urea for vehicle, including urine synthesis tank 1, delivery pump 2, crystallization kettle 3, vacuum pump
7, surge tank 6 and circulating pump 10.3 top of crystallization kettle is equipped with inlet, and bottom is equipped with liquid outlet and products export.The buffering
Tank 6, vacuum pump 7 and crystallization kettle 3 are sequentially connected, and make to form vacuum in crystallization kettle 3.The input port of the delivery pump 2 and urine
Synthesis tank 1 connects, and the delivery outlet of delivery pump 2 is connect with the inlet of crystallization kettle 3.The input port of the circulating pump 10 and crystallization
The liquid outlet of kettle 3 connects, and the delivery outlet of circulating pump 10 is connect with urine synthesis tank 1.The top of the crystallization kettle 3 is equipped with feed liquor
Pipe 4 and rotary nozzle 5；One end of the inlet tube 4 is connect with the inlet of crystallization kettle 3, and the other end connects with rotary nozzle 5
It connects, urea synthesis solution can be fully scattered in crystallization kettle 3 by rotary nozzle 5 to react, and response area is wide, improves product matter
The homogeneity of amount.The bottom of the crystallization kettle 3 is back taper, convenient for the yield of control product.
The coil pipe 9 is that pipe spirals, and is mounted on the middle and lower part of crystallization kettle 3；What the coil pipe upper end was formed
The internal diameter of annulus is more than the internal diameter for the annulus that lower end is formed, i.e. coil pipe 9 is in back taper.The coil pipe 9 and it is situated between equipped with cooling
Matter entrance and cooling media outlet.Cooling medium is passed through in the coil pipe 9, cooling medium is cold water.In the crystallization kettle 3
It is additionally provided with spray thrower, the spray thrower includes spray tube 11 and spray head 8；The spray tube 11 passes through pipeline and circulating pump
10 connections；The spray head 8 is uniformly arranged on spray tube 11；The spray tube 11 is arranged in the top of coil pipe 9.
In use, urea synthesis solution obtained by the reaction is entered by delivery pump 2 in vacuum state in urine synthesis tank 1
Crystallization kettle 3 in, crystalline carrier is used as using coil pipe 9 in crystallization kettle 3, and is passed through cooling medium into coil pipe 9 so that urea closes
Crystallisation by cooling purification is carried out at liquid, the valve of circulating pump 10 and 1 unicom of urine synthesis tank is opened, by unsaturated urea reaction liquid
It is delivered in urine synthesis tank 1 and is reacted again, after being so recycled to the urea reaction liquid that saturation is fully obtained by the reaction, closed
The valve of circulating pump 10 and 1 unicom of urine synthesis tank opens the valve being connect with the spray tube 11 in crystallization kettle 3, with saturation
Urea reaction liquid obtains the urea product of high-purity to crystallizing obtained product spray washing on coil pipe 9.
Claims (1)
1. a kind of coil pipe crystallizer producing urea for vehicle, it is characterised in that：Including urine synthesis tank（1）, delivery pump（2）、
Crystallization kettle（3）, vacuum pump（7）, surge tank（6）And circulating pump（10）；The crystallization kettle（3）Top is equipped with inlet, bottom
Equipped with liquid outlet and products export；The surge tank（6）, vacuum pump（7）With crystallization kettle（3）It is sequentially connected, makes crystallization kettle（3）
Interior formation vacuum；The delivery pump（2）Input port and urine synthesis tank（1）Connection, delivery pump（2）Delivery outlet and crystallization
Kettle（3）Inlet connection；The circulating pump（10）Input port and crystallization kettle（3）Liquid outlet connection, circulating pump（10）
Delivery outlet and urine synthesis tank（1）Connection；The crystallization kettle（3）It is interior to be equipped with coil pipe（9）；
The coil pipe（9）It spirals for pipe, is mounted on crystallization kettle（3）Middle and lower part；What the coil pipe upper end was formed
The internal diameter of annulus is more than the internal diameter for the annulus that lower end is formed, and is back taper；The coil pipe（9）And equipped with cooling medium inlet
With cooling media outlet；
The crystallization kettle（3）Inside it is additionally provided with spray thrower；The spray thrower includes spray tube（11）And spray head（8）；It is described
Spray tube（11）Pass through pipeline and circulating pump（10）Connection；The spray head（8）It is uniformly arranged in spray tube（11）On；Institute
The spray tube stated（11）It is arranged in coil pipe（9）Top：
The coil pipe（9）Inside it is passed through cooling medium；The cooling medium is cool brine or cold water；
The crystallization kettle（3）Top be equipped with inlet tube（4）And rotary nozzle（5）；The inlet tube（4）One end and knot
Brilliant kettle（3）Inlet connection, the other end and rotary nozzle（5）Connection；
The crystallization kettle（3）Bottom be back taper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307284.8A CN105749577B (en) | 2016-05-11 | 2016-05-11 | Produce the coil pipe crystallizer of urea for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610307284.8A CN105749577B (en) | 2016-05-11 | 2016-05-11 | Produce the coil pipe crystallizer of urea for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105749577A CN105749577A (en) | 2016-07-13 |
| CN105749577B true CN105749577B (en) | 2018-08-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610307284.8A Active CN105749577B (en) | 2016-05-11 | 2016-05-11 | Produce the coil pipe crystallizer of urea for vehicle |
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| Country | Link |
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| CN (1) | CN105749577B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113893809A (en) * | 2021-10-14 | 2022-01-07 | 丽江英煌集生物工程有限公司 | Device and method for synthesizing and purifying macamide |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2053214U (en) * | 1989-05-19 | 1990-02-21 | 尹绍炎 | Complete sets of equipment for efficient extracting perfume of cubeba oil |
| CN2625723Y (en) * | 2003-05-30 | 2004-07-14 | 林雄 | Steam generator automatic pollution discharge spring structure tapered heat-transfer surface |
| CN2706658Y (en) * | 2004-03-29 | 2005-06-29 | 李焕山 | Explosion-proof gasifier for liquefied petroleum gas |
| CN2781235Y (en) * | 2005-03-30 | 2006-05-17 | 谢坤 | Air-conditioning hot water insulation box |
| CN104557617A (en) * | 2013-10-10 | 2015-04-29 | 中国石油化工股份有限公司 | Diesel exhaust fluid production method |
| CN204815763U (en) * | 2015-06-16 | 2015-12-02 | 江阴市江中设备制造有限公司 | Evaporation crystallization integrated device |
-
2016
- 2016-05-11 CN CN201610307284.8A patent/CN105749577B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2053214U (en) * | 1989-05-19 | 1990-02-21 | 尹绍炎 | Complete sets of equipment for efficient extracting perfume of cubeba oil |
| CN2625723Y (en) * | 2003-05-30 | 2004-07-14 | 林雄 | Steam generator automatic pollution discharge spring structure tapered heat-transfer surface |
| CN2706658Y (en) * | 2004-03-29 | 2005-06-29 | 李焕山 | Explosion-proof gasifier for liquefied petroleum gas |
| CN2781235Y (en) * | 2005-03-30 | 2006-05-17 | 谢坤 | Air-conditioning hot water insulation box |
| CN104557617A (en) * | 2013-10-10 | 2015-04-29 | 中国石油化工股份有限公司 | Diesel exhaust fluid production method |
| CN204815763U (en) * | 2015-06-16 | 2015-12-02 | 江阴市江中设备制造有限公司 | Evaporation crystallization integrated device |
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| Publication number | Publication date |
|---|---|
| CN105749577A (en) | 2016-07-13 |
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