CN103804311A - Energy-saving melamine production process device - Google Patents
Energy-saving melamine production process device Download PDFInfo
- Publication number
- CN103804311A CN103804311A CN201210447819.3A CN201210447819A CN103804311A CN 103804311 A CN103804311 A CN 103804311A CN 201210447819 A CN201210447819 A CN 201210447819A CN 103804311 A CN103804311 A CN 103804311A
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- Prior art keywords
- washing tower
- reactor
- crystallizer
- urea washing
- gas
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
- C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
- C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
- C07D251/26—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hetero atoms directly attached to ring carbon atoms
- C07D251/40—Nitrogen atoms
- C07D251/54—Three nitrogen atoms
- C07D251/56—Preparation of melamine
- C07D251/60—Preparation of melamine from urea or from carbon dioxide and ammonia
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
- C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
- C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
- C07D251/26—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hetero atoms directly attached to ring carbon atoms
- C07D251/40—Nitrogen atoms
- C07D251/54—Three nitrogen atoms
- C07D251/62—Purification of melamine
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- 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
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses an energy-saving melamine production process device, which is characterized in that: a reactor is in connection with a hot air filter, a crystallizer, and a cyclone separator in order. One part of the cyclone separator is connected to a product packaging system, and the other part is connected to a urea washing tower. The gas outlet of the urea washing tower falls into three parts, one part is connected to a compressor and the reactor in order, one part is connected to a cool air fan, and is then tied back to the crystallizer, and the other part is directly connected to the outside for discharge. The liquid part is connected to a urine pump and a heat exchanger in order, and the heat exchanger is then tied back to the urea washing tower. Due to removal of hot gas cooling equipment and system, the risk that high pressure explosion can happen to channel produced, molten salt or other cooling media in the presence of water is completely eliminated. The technological process is optimized, and the device has the advantages of simple process, long operation time, elimination of potential risk, and small one-time investment, etc.
Description
Technical field
The present invention relates to Melamine Production field, be specifically related to a kind of Production Flow Chart device of energy-saving trimeric cyanamide.
Background technology
The production technique of trimeric cyanamide now, all take liquid area as raw material, at fluidized-bed reactor, at 350-420 ℃, under 0-0.5MPa pressure, reaction generates trimeric cyanamide, ammonia and carbonic acid gas, enter hot gas water cooler from reactor material gas out, process gas is lowered the temperature with other media such as Dao Sheng or fused salt, make high boiling point by-products produced with solid crystal out, process stream gas after being cooled enters the solid impurity in hot-air filter filtering gas, gas after filtration enters crystallizer and the reverse contact heat-exchanging of technique cold air of urinating washing system from liquid, trimeric cyanamide is separated out from process stream gas with the form of solid, then after separating, cyclonic separator send packaging system containing the gas of trimeric cyanamide solid.Added and be sent to the washing of liquid urine washing system and cooling by blower fan from cyclonic separator gas out, the gas after cooling is through separating Hou Fen tri-tunnels, and a road is as the technique cold air device that decrystallizes, and a road is as circulation gas dereaction device, and receive as the tail gas aspiration that truncates on a road.
The shortcoming of this technique is that hot gas water cooler easily stops up, and device continuous operating time is short, and 30-40 days left and right devices of every operation will stop, the heat transfer tube of cleaning hot gas water cooler, and cleaning difficulty is large, and clearance time reaches two weeks, and expense is up to 100,000 yuan; The 2nd, Dao Sheng or salt melting system are dangerous large, and the life of high temperature road or fused salt are met water generates high pressure, the danger of easily blasting.
Summary of the invention
The object of the present invention is to provide that a kind of flow process is simple, long operational time, eliminated the Production Flow Chart device of the energy-saving trimeric cyanamide of the advantages such as potential danger, one-time investment are few.
The object of the invention is to adopt following technical scheme to realize: a kind of Production Flow Chart device of energy-saving trimeric cyanamide, comprise reactor, hot-air filter, crystallizer, cyclonic separator, product unlap system, urea washing tower, urine pump, heat exchanger, Cool gas blower, compressor, it is characterized in that: reactor connects hot-air filter, crystallizer, cyclonic separator successively; A cyclonic separator part is connected to product unlap system, and another part is connected to urea washing tower; Urea washing tower pneumatic outlet is divided into three parts, and a part is connected to compressor, reactor successively, and a part is connected to Cool gas blower, tieback is to crystallizer again, another part is outer row directly, and liquid portion is connected to urine pump, heat exchanger successively, this heat exchanger again tieback to urea washing tower.
Feature of the present invention is: directly enter hot-air filter from the reactor process gas containing trimeric cyanamide out, hot gas cooling apparatus and cooling system are removed, with in the technique of present trimeric cyanamide, be introduced into hot gas water cooler from reactor process gas out, and then enter hot-air filter comparison, the former has saved hot gas cooling system, thoroughly eliminate the factor that causes device to stop because of the obstruction of hot gas heat-exchange tube of cooler, avoided the trouble of stopping device being cleared up, the cycle of operation extends to more than 90 days continuously; Owing to having removed hot gas cooling apparatus and system, thoroughly eliminate the heat-eliminating mediums such as road life or fused salt and met the danger that water generates high pressure explodes because equipment leaks; Optimize technical process, had that flow process is simple, long operational time, eliminated the advantage such as potential danger, one-time investment province.
Accompanying drawing explanation
Concrete structure of the present invention is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is structural representation of the present invention.
Fig. 1 doubles as Figure of abstract.
In figure 1, urea, 2, reactor, 3, hot-air filter, 4, crystallizer, 5, cyclonic separator, 6, product unlap system, 7, urea washing tower, 8, urine pump, 9, heat exchanger, 10, Cool gas blower, 11, compressor.
Embodiment
By the following examples, the present invention is described in more detail, but as long as within the scope of main idea of the present invention, is not limited in following examples.
The Production Flow Chart device of a kind of energy-saving trimeric cyanamide as shown in Figure 1, comprise reactor, hot-air filter, crystallizer, cyclonic separator, product unlap system, urea washing tower, urine pump, heat exchanger, Cool gas blower, compressor, it is characterized in that: reactor 2 connects hot-air filter 3, crystallizer 4, cyclonic separator 5 successively; Cyclonic separator 5 parts are connected to product unlap system 6, and another part is connected to urea washing tower 7; Urea washing tower 7 pneumatic outlets are divided into three parts, and a part is connected to compressor 9, reactor 2 successively, and a part is connected to Cool gas blower 10, tieback is to crystallizer 4 again, another part is outer row directly, and liquid portion is connected to urine pump 8, heat exchanger 9 successively, then tieback is to urea washing tower 7.
The object of the present invention is achieved like this: take urea as raw material, in reactor 2 by the katalysis of catalyzer, under 350-420 ℃, 0-0.6MPa pressure, reaction generates trimeric cyanamide, ammonia and carbonic acid gas, directly entering hot-air filter 3 from reactor 2 material gas out filters, remove hot gas water cooler, the process gas containing trimeric cyanamide after filtration enters crystallizer 4, and the trimeric cyanamide after crystallization enters cyclonic separator 5, isolated solid triamine feeding storehouse packing; Enter urea washing tower 7 from cyclonic separator 5 gas out, urinate with jacket water (J.W.) the gas containing ammonia and carbonic acid gas of 200-220 ℃ is cooled to 130-145 ℃ by liquid, then feed liquor urine washing tower purifies process gas, purify after absorbing the liquid urine droplet of gas by carrying secretly in separator divided gas flow, gas Fen San road after separation a: road enters reactor 2 with compressor 11 compressions, one tunnel through Cool gas blower boost enter crystallizer 4, one tunnels be tail gas discharge system.
The present invention has optimized Melamine Production flow path device, has removed hot gas cooling apparatus and cooling system from reactor 2 to hot-air filter 3.
Above-described embodiment is only one of preferred embodiment of the present invention, not limits the scope of the invention with this, therefore: all equivalences of doing according to shape of the present invention, structure, principle change, within all should being covered by protection scope of the present invention.
Claims (2)
1. the Production Flow Chart device of an energy-saving trimeric cyanamide, comprise reactor, hot-air filter, crystallizer, cyclonic separator, product unlap system, urea washing tower, urine pump, heat exchanger, Cool gas blower, compressor, it is characterized in that: reactor 2 connects hot-air filter 3, crystallizer 4, cyclonic separator 5 successively; Cyclonic separator 5 parts are connected to product unlap system 6, and another part is connected to urea washing tower 7.
2. the Production Flow Chart device of a kind of energy-saving trimeric cyanamide according to claim 1, it is characterized in that: urea washing tower 7 pneumatic outlets are divided into three parts, a part is connected to compressor 9, reactor 2 successively, a part is connected to Cool gas blower 10, tieback is to crystallizer 4 again, another part is outer row directly, and liquid portion is connected to urine pump 8, heat exchanger 9 successively, then tieback is to urea washing tower 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210447819.3A CN103804311A (en) | 2012-11-02 | 2012-11-02 | Energy-saving melamine production process device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210447819.3A CN103804311A (en) | 2012-11-02 | 2012-11-02 | Energy-saving melamine production process device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103804311A true CN103804311A (en) | 2014-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210447819.3A Pending CN103804311A (en) | 2012-11-02 | 2012-11-02 | Energy-saving melamine production process device |
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| Country | Link |
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| CN (1) | CN103804311A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105218470A (en) * | 2015-08-22 | 2016-01-06 | 安徽金禾实业股份有限公司 | Solid and gas tripping device in a kind of Melamine Production |
| CN109369551A (en) * | 2018-10-17 | 2019-02-22 | 阳煤丰喜肥业（集团）有限责任公司 | A kind of long period energy-saving melamine production system |
| CN115073389A (en) * | 2022-07-01 | 2022-09-20 | 山东省舜天化工集团有限公司 | Energy-saving melamine production system and production method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008098732A1 (en) * | 2007-02-16 | 2008-08-21 | Lurgi Gmbh | Gas scrubber and use of the gas scrubber in melamine production |
| CN102219754A (en) * | 2011-04-28 | 2011-10-19 | 四川金圣赛瑞化工有限责任公司 | Energy-saving and resource-saving system and process for producing melamine by using gas-phase quenching process |
| CN102558079A (en) * | 2011-12-30 | 2012-07-11 | 南通紫鑫实业有限公司 | Process for producing melamine |
| CN102584730A (en) * | 2012-03-12 | 2012-07-18 | 李靖铭 | Equipment and process for producing melamine under low pressure |
| CN202898280U (en) * | 2012-11-04 | 2013-04-24 | 华强化工集团股份有限公司 | Energy-saving melamine production device |
-
2012
- 2012-11-02 CN CN201210447819.3A patent/CN103804311A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008098732A1 (en) * | 2007-02-16 | 2008-08-21 | Lurgi Gmbh | Gas scrubber and use of the gas scrubber in melamine production |
| CN102219754A (en) * | 2011-04-28 | 2011-10-19 | 四川金圣赛瑞化工有限责任公司 | Energy-saving and resource-saving system and process for producing melamine by using gas-phase quenching process |
| CN102558079A (en) * | 2011-12-30 | 2012-07-11 | 南通紫鑫实业有限公司 | Process for producing melamine |
| CN102584730A (en) * | 2012-03-12 | 2012-07-18 | 李靖铭 | Equipment and process for producing melamine under low pressure |
| CN202898280U (en) * | 2012-11-04 | 2013-04-24 | 华强化工集团股份有限公司 | Energy-saving melamine production device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105218470A (en) * | 2015-08-22 | 2016-01-06 | 安徽金禾实业股份有限公司 | Solid and gas tripping device in a kind of Melamine Production |
| CN109369551A (en) * | 2018-10-17 | 2019-02-22 | 阳煤丰喜肥业（集团）有限责任公司 | A kind of long period energy-saving melamine production system |
| CN115073389A (en) * | 2022-07-01 | 2022-09-20 | 山东省舜天化工集团有限公司 | Energy-saving melamine production system and production method |
| CN115073389B (en) * | 2022-07-01 | 2023-10-31 | 山东省舜天化工集团有限公司 | Energy-saving melamine production system and production method |
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Application publication date: 20140521 |