CN105854338A - Tube-nest crystallization apparatus for producing vehicular aqueous urea solution - Google Patents
Tube-nest crystallization apparatus for producing vehicular aqueous urea solution Download PDFInfo
- Publication number
- CN105854338A CN105854338A CN201610310764.XA CN201610310764A CN105854338A CN 105854338 A CN105854338 A CN 105854338A CN 201610310764 A CN201610310764 A CN 201610310764A CN 105854338 A CN105854338 A CN 105854338A
- Authority
- CN
- China
- Prior art keywords
- crystallization kettle
- urea
- pump
- tubulation
- crystallization
- 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.)
- Granted
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 238000002425 crystallisation Methods 0.000 title claims abstract description 88
- 230000008025 crystallization Effects 0.000 title claims abstract description 82
- 239000004202 carbamide Substances 0.000 title claims abstract description 63
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 57
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 210000002700 urine Anatomy 0.000 claims description 31
- 239000002826 coolant Substances 0.000 claims description 25
- 239000007921 spray Substances 0.000 claims description 22
- 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
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 235000013877 carbamide Nutrition 0.000 description 49
- 239000000243 solution Substances 0.000 description 18
- 239000012295 chemical reaction liquid Substances 0.000 description 13
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 150000003672 ureas Chemical class 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007787 solid Substances 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
- 230000033228 biological regulation Effects 0.000 description 1
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 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
- 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
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000376 reactant Substances 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
- C07C273/04—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D2009/0086—Processes or apparatus therefor
-
- 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
Abstract
The invention discloses a tube-nest crystallization apparatus for producing vehicular aqueous urea solution, comprising a urea synthesis tank, a conveying pump, a crystallization kettle, a vacuum pump, a buffer tank and a circulating pump; the top of the crystallization kettle is provided with a liquid inlet, and the bottom of the crystallization kettle is provided with a liquid outlet and a product outlet; the buffer tank, the vacuum pump and the crystallization kettle are connected in succession so that the crystallization kettle is evacuated; a feed port of the conveying pump is connected with the urea synthesis tank, and a discharge port of the conveying pump is connected with the liquid inlet of the crystallization kettle; a feed port of the circulating pump is connected with the liquid outlet of the crystallization kettle, and a discharge port of the circulating pump is connected with the urea synthesis tank; the crystallization kettle is also provided with a crystallization device. Urea synthetic liquid obtained by reacting in the urea synthesis tank is used directly to enable crystallization in vacuum, process flow is simplified, production cost is reduced, and the tube-nest crystallization apparatus is capable of producing a high-batch high-purity vehicular aqueous urea solution continuously and has good economic benefit and social benefit.
Description
Technical field
The invention belongs to produce urea for vehicle technical field, relate to a kind of tubulation crystallizer producing urea for vehicle.
Background technology
Regulation according to national environmental protection department, from 1 day July in 2013, the heavy-duty diesel vehicle of sale was intended to reach state IV discharge standard, compared with state Ⅲ emission standard, the state IV of heavy-duty diesel oil automobile discharges discharged nitrous oxides and reduces about 30%, and particulate matter (PM) discharge reduces more than 80%.In order to reduce the nitrogen oxides in exhaust gas from diesel vehicle discharge and particulate matter.At present, car manufactures commonly used SCR (SCR) the technical finesse exhaust gas from diesel vehicle of the countries such as America and Europe, make up to Europe V, the most higher discharge standard in Europe VI.
Exhaust gas from diesel vehicle treatment fluid is to cooperate with SCR technology, by the reducing agent that the conversion of nitrogen oxides in motor exhaust is harmless nitrogen and water, the primary raw material of exhaust gas from diesel vehicle treatment fluid is urea for vehicle and water, urea for vehicle is not common agriculture carbamide or industrial urea, it it is not chemical analysis reagent, but one has certain added value, can the specialty chemicals of large-scale industrial production.Urea for vehicle operation principle is that urea for vehicle is added to SCR system, and in hot environment (temperature is higher than 300 DEG C), carbamide resolves into ammonia, adds the effect of catalyst, and the nitrogen oxides in tail gas can react rapidly generation nitrogen and water with ammonia.The delivery temperature of diesel engine is generally 300-500 DEG C, meets the heat required for nitrogen oxides reduction.
At present, the main flow of urea production is that ammonia and carbon dioxide react generation urea synthesis reaction liquid under certain condition, and urea synthesis reaction liquid obtains solid urea through processes such as flush distillation, double evaporation-cooling, pelletizes again.But, the purity requirement of urea for vehicle is the highest, commercially available industry or agricultural urea granules are higher due to magazine content such as biurets, can not be directly used in preparation urea for vehicle solution, it is necessary to make urea synthesis reaction liquid by impurity contents such as the biurets that repeatedly crystallizes to reduce in carbamide.
Summary of the invention
The invention provides a kind of equipment simple, floor space is little, improves the tubulation crystallizer of the production urea for vehicle of the purification efficiency of carbamide.
In order to realize foregoing invention purpose, technical scheme is as follows:
A kind of tubulation crystallizer producing urea for vehicle, including urine synthesis tank, delivery pump, crystallization kettle, vacuum pump, surge tank and circulating pump；Described crystallization kettle is arranged over inlet, and bottom is provided with liquid outlet and products export；Described surge tank, vacuum pump are sequentially connected with crystallization kettle, form vacuum in making crystallization kettle；The input port of described delivery pump is connected with urine synthesis tank, and the delivery outlet of delivery pump is connected with the inlet of crystallization kettle；The input port of described circulating pump is connected with the liquid outlet of crystallization kettle, and the delivery outlet of circulating pump is connected with urine synthesis tank；Described crystallization kettle is additionally provided with vertical array tubular.
As improving further, above-described vertical array tubular is formed in parallel in being distributed in crystallization kettle by many tubulation Vertical Uniforms；Described vertical array tubular is additionally provided with cooling medium entrance and cooling medium outlet.
As improving further, in above-described crystallization kettle, it is additionally provided with spray thrower；Described spray thrower includes shower and spray head；Described shower is connected with circulating pump by pipeline；Described spray head is uniform to be arranged on shower；Described shower is arranged on the top of vertical array tubular.
As improving further, in above-described vertical array tubular, it is passed through cooling medium；Described cooling medium is cool brine or cold water.
As improving further, above-described crystallization kettle be arranged over feed tube and rotary nozzle；One end of described feed tube is connected with the inlet of crystallization kettle, and the other end is connected with rotary nozzle.
As improving further, the bottom of above-described crystallization kettle is inverted cone.
During use, urine synthesis tank reacts the urea synthesis solution obtained and enters in the crystallization kettle being in vacuum state by delivery pump, crystallization kettle use vertical array tubular as crystalline carrier, and in vertical array tubular, it is passed through cooling medium, urea synthesis solution is made to carry out crystallisation by cooling purification, open the valve of circulating pump and urine synthesis tank UNICOM, be delivered in urine synthesis tank again react by unsaturated urea reaction liquid；So it is recycled to after fully reaction obtains saturated urea reaction liquid, close the valve of circulating pump and urine synthesis tank UNICOM, open the valve being connected with the shower in crystallization kettle, with crystallizing obtained product spray washing on the saturated vertical tubulation of urea reaction liquid, improve the purity of product.
Compared to prior art, the present invention has the advantage that and has the beneficial effect that:
1, the present invention reacts the urea synthesis solution obtained and crystallizes in directly using urine synthesis tank, make use of the feature that the temperature of urea synthesis solution is high, it is not necessary to additional heat, decreases the generation of biuret；And in vacuum environment, the high-temperature water meeting rapid vaporization in urea synthesis solution, therefore have part water and be evaporated from urea synthesis solution, improve the concentration of urea synthesis solution, improve the productivity ratio of product, it is ensured that the quality of product.
2, the crystallization kettle of the present invention uses vertical array tubular as crystalline carrier so that urea synthesis solution carries out heat exchange, crystallisation by cooling with cooling medium under vacuum, improves production efficiency；Meanwhile, crystalline solid is suspended on vertical array tubular, when crystalline substance, liquid two-phase laminated flow, thoroughly discharges the liquid that impurity content is high, improves purification rate.
3, the crystallization kettle in the present invention is provided with spray thrower, the reactant liquor that crystal column surface and crystallization kettle are remaining can be carried out spray washing, decrease impurity content, improve product quality.
4, the present invention is provided with circulating pump, unsaturated urea synthesis solution can be delivered in urea synthesis tank carry out secondary response again again, save raw material, reduce production cost.
5, the rotary nozzle that the present invention is provided with, fully can be scattered in urea synthesis solution in crystallization kettle and react, and response area is wide, improves the homogeneity of product quality, improves crystalline rate simultaneously.
6, present configuration advantages of simple, simplifies technological process, reduces production cost, can produce high-volume, highly purified urea for vehicle, energy-conserving and environment-protective continuously, have preferable economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Accompanying drawing identifies:
1-urine synthesis tank, 2-delivery pump, 3-crystallization kettle, 4-feed tube, 5-rotary nozzle, 6-surge tank, 7-vacuum pump-, 8-spray head, 9-vertical array tubular, 10-circulating pump, 11-shower.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment 1:
A kind of tubulation 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.Crystallization kettle 3 is arranged over inlet, and bottom is provided with liquid outlet and products export.Described surge tank 6, vacuum pump 7 are sequentially connected with crystallization kettle 3, form vacuum in making crystallization kettle 3.The input port of described delivery pump 2 is connected with urine synthesis tank 1, and the delivery outlet of delivery pump 2 is connected with the inlet of crystallization kettle 3.The input port of described circulating pump 10 is connected with the liquid outlet of crystallization kettle 3, and the delivery outlet of circulating pump 10 is connected with urine synthesis tank 1；Described crystallization kettle 3 is additionally provided with vertical array tubular 9.
Described vertical array tubular 9 is formed in parallel in being distributed in crystallization kettle 3 by many tubulation Vertical Uniforms；Described vertical array tubular 9 is additionally provided with cooling medium entrance and cooling medium outlet.It is passed through cooling medium in described vertical array tubular 9；Described cooling medium is cool brine.
During use, urine synthesis tank 1 reacts the urea synthesis solution obtained and enters in the crystallization kettle 3 being in vacuum state by delivery pump 2, crystallization kettle 3 use vertical array tubular 9 as crystalline carrier, and it is passed through cooling medium in vertical array tubular 9, urea synthesis solution is made to carry out crystallisation by cooling purification, open the valve of circulating pump 10 and urine synthesis tank 1 UNICOM, be delivered in urine synthesis tank 1 again react by unsaturated urea reaction liquid, obtain highly purified urea product.
Embodiment 2:
A kind of tubulation 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.Crystallization kettle 3 is arranged over inlet, and bottom is provided with liquid outlet and products export.Described surge tank 6, vacuum pump 7 are sequentially connected with crystallization kettle 3, form vacuum in making crystallization kettle 3.The input port of described delivery pump 2 is connected with urine synthesis tank 1, and the delivery outlet of delivery pump 2 is connected with the inlet of crystallization kettle 3.The input port of described circulating pump 10 is connected with the liquid outlet of crystallization kettle 3, and the delivery outlet of circulating pump 10 is connected with urine synthesis tank 1；Described crystallization kettle 3 is additionally provided with vertical array tubular 9.
Described vertical array tubular 9 is formed in parallel in being distributed in crystallization kettle 3 by many tubulation Vertical Uniforms；Described vertical array tubular 9 is additionally provided with cooling medium entrance and cooling medium outlet.It is passed through cooling medium in described vertical array tubular 9；Described cooling medium is cold water.It is additionally provided with spray thrower in described crystallization kettle 3；Spray thrower includes shower 11 and spray head 8；Described shower 11 is connected with circulating pump 10 by pipeline；Described spray head 8 is uniform to be arranged on shower 11；Described shower 11 is arranged on the top of vertical array tubular 9.
During use, urine synthesis tank 1 reacts the urea synthesis solution obtained and enters in the crystallization kettle 3 being in vacuum state by delivery pump 2, crystallization kettle 3 use vertical array tubular 9 as crystalline carrier, and it is passed through cooling medium in vertical array tubular 9, urea synthesis solution is made to carry out crystallisation by cooling purification, open the valve of circulating pump 10 and urine synthesis tank 1 UNICOM, it is delivered in urine synthesis tank 1 again react by unsaturated urea reaction liquid, so it is recycled to after fully reaction obtains saturated urea reaction liquid, close the valve of circulating pump 10 and urine synthesis tank 1 UNICOM, open the valve being connected with the shower 11 in crystallization kettle 3, obtained product spray washing is crystallized with on the saturated vertical tubulation of urea reaction liquid 9, obtain highly purified urea product.
Embodiment 3:
A kind of tubulation 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.Crystallization kettle 3 is arranged over inlet, and bottom is provided with liquid outlet and products export.Described surge tank 6, vacuum pump 7 are sequentially connected with crystallization kettle 3, form vacuum in making crystallization kettle 3.The input port of described delivery pump 2 is connected with urine synthesis tank 1, and the delivery outlet of delivery pump 2 is connected with the inlet of crystallization kettle 3.The input port of described circulating pump 10 is connected with the liquid outlet of crystallization kettle 3, and the delivery outlet of circulating pump 10 is connected with urine synthesis tank 1.Described crystallization kettle 3 be arranged over feed tube 4 and rotary nozzle 5；One end of described feed tube 4 is connected with the inlet of crystallization kettle 3, and the other end is connected with rotary nozzle 5, and urea synthesis solution can be fully scattered in crystallization kettle 3 and react by rotary nozzle 5, and response area is wide, improves the homogeneity of product quality.The bottom of described crystallization kettle 3 is inverted cone, it is simple to control the yield of product.
Described crystallization kettle 3 is additionally provided with vertical array tubular 9.Described vertical array tubular 9 is formed in parallel in being distributed in crystallization kettle 3 by many tubulation Vertical Uniforms；Described vertical array tubular 9 is additionally provided with cooling medium entrance and cooling medium outlet.It is passed through cooling medium in described vertical array tubular 9；Described cooling medium is cold water.Being additionally provided with spray thrower in described crystallization kettle 3, spray thrower includes shower 11 and spray head 8；Described shower 11 is connected with circulating pump 10 by pipeline；Described spray head 8 is uniform to be arranged on shower 11；Described shower 11 is arranged on the top of vertical array tubular 9.
During use, urine synthesis tank 1 reacts the urea synthesis solution obtained and enters in the crystallization kettle 3 being in vacuum state by delivery pump 2, crystallization kettle 3 use vertical array tubular 9 as crystalline carrier, and it is passed through cooling medium in vertical array tubular 9, urea synthesis solution is made to carry out crystallisation by cooling purification, open the valve of circulating pump 10 and urine synthesis tank 1 UNICOM, it is delivered in urine synthesis tank 1 again react by unsaturated urea reaction liquid, so it is recycled to after fully reaction obtains saturated urea reaction liquid, close the valve of circulating pump 10 and urine synthesis tank 1 UNICOM, open the valve being connected with the shower 11 in crystallization kettle 3, obtained product spray washing is crystallized with on the saturated vertical tubulation of urea reaction liquid, obtain highly purified urea product.
Claims (6)
1. the tubulation crystallizer producing urea for vehicle, it is characterised in that: include urine synthesis tank (1), delivery pump (2), crystallization kettle (3), vacuum pump (7), surge tank (6) and circulating pump (10)；Described crystallization kettle (3) is arranged over inlet, and bottom is provided with liquid outlet and products export；Described surge tank (6), vacuum pump (7) are sequentially connected with crystallization kettle (3), form vacuum in making crystallization kettle (3)；The input port of described delivery pump (2) is connected with urine synthesis tank (1), and the delivery outlet of delivery pump (2) is connected with the inlet of crystallization kettle (3)；The input port of described circulating pump (10) is connected with the liquid outlet of crystallization kettle (3), and the delivery outlet of circulating pump (10) is connected with urine synthesis tank (1)；Described crystallization kettle (3) is additionally provided with vertical array tubular (9).
The tubulation crystallizer of production urea for vehicle the most according to claim 1, it is characterised in that: described vertical array tubular (9) is formed in parallel in being distributed in crystallization kettle (3) by many tubulation Vertical Uniforms；Described vertical array tubular (9) is additionally provided with cooling medium entrance and cooling medium outlet.
The tubulation crystallizer of production urea for vehicle the most according to claim 2, it is characterised in that: it is additionally provided with spray thrower in described crystallization kettle (3)；Described spray thrower includes shower (11) and spray head (8)；Described shower (11) is connected with circulating pump (10) by pipeline；Described spray head (8) is uniform to be arranged on shower (11)；Described shower (11) is arranged on the top of vertical array tubular (9).
4. according to the tubulation crystallizer of the arbitrary described production urea for vehicle of Claims 2 or 3, it is characterised in that: it is passed through cooling medium in described vertical array tubular (9)；Described cooling medium is cool brine or cold water.
The tubulation crystallizer of production urea for vehicle the most according to claim 1, it is characterised in that: described crystallization kettle (3) be arranged over feed tube (4) and rotary nozzle (5)；One end of described feed tube (4) is connected with the inlet of crystallization kettle (3), and the other end is connected with rotary nozzle (5).
The tubulation crystallizer of production urea for vehicle the most according to claim 1, it is characterised in that: the bottom of described crystallization kettle (3) is inverted cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610310764.XA CN105854338B (en) | 2016-05-11 | 2016-05-11 | Produce the tubulation crystallizer of urea for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610310764.XA CN105854338B (en) | 2016-05-11 | 2016-05-11 | Produce the tubulation crystallizer of urea for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105854338A true CN105854338A (en) | 2016-08-17 |
| CN105854338B CN105854338B (en) | 2018-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610310764.XA Active CN105854338B (en) | 2016-05-11 | 2016-05-11 | Produce the tubulation crystallizer of urea for vehicle |
Country Status (1)
| Country | Link |
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| CN (1) | CN105854338B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112245960A (en) * | 2020-10-28 | 2021-01-22 | 武汉本杰明医药股份有限公司 | Recrystallization device for preparing dapagliflozin intermediate |
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|---|---|---|---|---|
| US3788095A (en) * | 1971-05-25 | 1974-01-29 | Thiokol Chemical Corp | Spray-freezing apparatus and method |
| CN1038590A (en) * | 1989-04-14 | 1990-01-10 | 天津大学 | Tower liquid film crystalline device and technology with filler tube sheet |
| CN2920272Y (en) * | 2006-05-18 | 2007-07-11 | 萨摩亚商质量管理有限公司 | Structure of safety intravenous injector |
| CN102430261A (en) * | 2011-09-13 | 2012-05-02 | 浙江华亿工程设计有限公司 | Continuous cooling crystallizer |
| 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 CN201610310764.XA patent/CN105854338B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3788095A (en) * | 1971-05-25 | 1974-01-29 | Thiokol Chemical Corp | Spray-freezing apparatus and method |
| CN1038590A (en) * | 1989-04-14 | 1990-01-10 | 天津大学 | Tower liquid film crystalline device and technology with filler tube sheet |
| CN2920272Y (en) * | 2006-05-18 | 2007-07-11 | 萨摩亚商质量管理有限公司 | Structure of safety intravenous injector |
| CN102430261A (en) * | 2011-09-13 | 2012-05-02 | 浙江华亿工程设计有限公司 | Continuous cooling crystallizer |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112245960A (en) * | 2020-10-28 | 2021-01-22 | 武汉本杰明医药股份有限公司 | Recrystallization device for preparing dapagliflozin intermediate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105854338B (en) | 2018-03-13 |
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Denomination of invention: Tube-nest crystallization apparatus for producing vehicular aqueous urea solution Effective date of registration: 20200327 Granted publication date: 20180313 Pledgee: Nanning United Innovation Financing Guarantee Co.,Ltd. Pledgor: Guangxi Xiayang Environmental Protection Technology Co.,Ltd. Registration number: Y2020450000012 |
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Denomination of invention: Tubular crystallization equipment for production of vehicle urea Effective date of registration: 20210330 Granted publication date: 20180313 Pledgee: Nanning United Innovation Financing Guarantee Co.,Ltd. Pledgor: Guangxi Xiayang Environmental Protection Technology Co.,Ltd. Registration number: Y2021450000009 |
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Denomination of invention: In line crystallizing equipment for production of vehicle urea Effective date of registration: 20220609 Granted publication date: 20180313 Pledgee: Guangxi Guihui Financing Guarantee Co.,Ltd. Pledgor: Guangxi Xiayang Environmental Protection Technology Co.,Ltd. Registration number: Y2022450000082 |
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