CN107272756A - A kind of novel urea ammonia/carbon ratio control device - Google Patents
A kind of novel urea ammonia/carbon ratio control device Download PDFInfo
- Publication number
- CN107272756A CN107272756A CN201710599286.3A CN201710599286A CN107272756A CN 107272756 A CN107272756 A CN 107272756A CN 201710599286 A CN201710599286 A CN 201710599286A CN 107272756 A CN107272756 A CN 107272756A
- Authority
- CN
- China
- Prior art keywords
- transmitter
- trunk line
- carbon dioxide
- ammonia
- blender
- 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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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/131—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components
- G05D11/132—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components by controlling the flow of the individual components
-
- 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 kind of novel urea ammonia/carbon ratio control device, it includes synthetic tower, Trunk Line, regulating valve, flow transmitter, first ammonium liquid density type analyzer, pressure transmitter, thermocouple thermometer, blender, control unit；Flow transmitter includes the first carbon dioxide stream transmitter, the second carbon dioxide stream transmitter, the first liquefied ammonia flow transmitter and the second liquefied ammonia flow transmitter；Blender includes the first blender and the second blender；Trunk Line includes carbon dioxide Trunk Line, first ammonium liquid Trunk Line, liquefied ammonia Trunk Line and synthetic tower outlet Trunk Line；Carbon dioxide Trunk Line is connected by the first blender with synthetic tower；Etc. connected mode.The present invention can react ammonia/carbon ratio in synthetic tower in time by installing first ammonium liquid density type analyzer in urea synthesizer outlet line, it is easy to adjust in time to entering urea synthesizer liquefied ammonia, carbon dioxide, improve urea yield, ammonia and steam consumption is greatly lowered, it is ensured that the safe and stable operation of system.
Description
Technical field
The present invention relates to a kind of novel urea ammonia/carbon ratio control device.
Background technology
Ammonia/carbon ratio (N/C) is to improve one of important parameter of urea high-quality and high-efficiency synthesis.Urea synthesizing workshop section, titanium dioxide
Carbon and ammonia react generation urea in synthetic tower, and this is a balanced reaction.In order to ensure that the stable of urea synthesizing is carried out, realize
Self-sufficient, the satisfied urea production rate of acquisition, it is necessary to which the ratio to various compositions in synthetic tower is entered of synthetic tower internal energy
The strict control of row, this ratio is ammonia/carbon mol ratio.
Current method analysis ammonia/carbon ratio, conventional is all the Instructing manufacture by manually analyzing, complex operation and not
Operating mode can be reflected in time, index can not be controlled in time, majority operation personnel are more desirable can to realize on-line analysis.It is external online
Analysis and technique bag bundle sale, price and its costliness.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of lower-cost novel urea ammonia/carbon ratio
Control device, meets technological requirement.
The purpose of the present invention is achieved through the following technical solutions：A kind of novel urea ammonia/carbon ratio control device, it
Including synthetic tower, Trunk Line, regulating valve, flow transmitter, first ammonium liquid density type analyzer, pressure transmitter, thermocouple thermometer,
Blender, control unit；
Described flow transmitter includes the first carbon dioxide stream transmitter, the second carbon dioxide stream transmitter, the
One liquefied ammonia flow transmitter and the second liquefied ammonia flow transmitter；
Described blender includes the first blender and the second blender；
Described Trunk Line includes carbon dioxide Trunk Line, first ammonium liquid Trunk Line, liquefied ammonia Trunk Line and synthetic tower outlet master
Pipeline；
Carbon dioxide Trunk Line is connected by the first blender with synthetic tower, liquefied ammonia Trunk Line respectively with the second blender and
Synthetic tower is connected, and the second blender is also respectively connected with first ammonium liquid Trunk Line and the first blender；First blender and synthetic tower phase
Even, liquefied ammonia Trunk Line is connected with the second blender and synthetic tower respectively, mainly by first ammonium liquid, liquefied ammonia, three kinds of Jie of carbon dioxide
Enter synthetic tower after matter is well mixed, synthetic tower interior energy is fully reacted；Second blender connects first ammonium liquid Trunk Line, liquid respectively
Ammonia Trunk Line and the first blender；Mixed after making first ammonium liquid and liquefied ammonia well mixed with carbon dioxide entering back into the first blender
Close；
First ammonium pump is provided with described first ammonium liquid Trunk Line, regulating valve is arranged on synthetic tower outlet Trunk Line, first
Carbon dioxide stream transmitter and the second carbon dioxide stream transmitter are arranged on carbon dioxide Trunk Line, the first liquefied ammonia flow
Transmitter and the second liquefied ammonia flow transmitter are arranged on liquefied ammonia Trunk Line, and first ammonium liquid density type analyzer is arranged on synthetic tower outlet
On Trunk Line, thermocouple thermometer is arranged on synthesis tower side wall；
Described flow transmitter, pressure transmitter, first ammonium liquid density type analyzer, thermocouple thermometer and regulating valve with
Control unit is connected；
The first described carbon dioxide stream transmitter and the second carbon dioxide stream transmitter are temperature, pressure, differential pressure
2 holes, which are opened, on three-in-one transmitter, place carbon dioxide Trunk Line is respectively connected to the first carbon dioxide stream with stainless steel pressure guiding pipe
Transmitter and the second carbon dioxide stream transmitter；Temperature, pressure, differential pressure Cheng Yi transmitter of three kinds of parameter sets is enterprising
The automatic compensation of row, display flow is operating mode real traffic, easy for installation, can reduce the installation of primary instrument, computer cable,
DCS fastener quantity, greatly reduces cost.The three-in-one flow transmitter of temperature, pressure, differential pressure also has precision high, can be built-in
Compensation program, transmits easily advantage；
The first described liquefied ammonia flow transmitter and the second liquefied ammonia flow transmitter are differential pressure transmitter, in liquefied ammonia Trunk Line
2 holes are respectively opened before and after the upper double impulse built-in orificeplates of installation stainless steel, orifice plate；Import is positive pressure side, exports as suction side, uses respectively
Stainless steel pressure guiding pipe introduces the positive and negative both sides of the first liquefied ammonia flow transmitter and the second liquefied ammonia flow transmitter；
Described pressure transmitter includes the first synthetic tower pressure transmitter and the second synthetic tower pressure transmitter, in liquefied ammonia
Perforate introduces the first synthetic tower pressure transmitter and the second synthetic tower pressure transmitter with stainless steel pressure guiding pipe respectively on Trunk Line.
It is preferred that, described stainless steel pressure guiding pipe is the stainless steel pressure guiding pipes of Φ 14.
It is preferred that, described control unit is DCS system, using DCS control systems are easy to operate, automation journey
Degree is high, computing function is powerful, control accuracy is high, save labour, safety and stability.
It is preferred that, described electric thermo-couple temperature is calculated as the three one group I grades of E indexing thermocouple thermometer of Φ 3, uses
Three select two mode to be compared, it is ensured that temperature is shown reliably, accurately.
It is preferred that, the preferred 600mm of 500mm~700mm in thermocouple thermometer insertion tower survey urea synthesizer tower
Interior temperature is accurate.
It is preferred that, synthetic tower sidewall weld has a thermometric protecting pipe, and 500mm in thermometric protecting pipe insertion tower~
The preferred 600mm of 700mm, the length of thermocouple thermometer is consistent with the length of thermometric protecting pipe, thermocouple thermometer insertion thermometric
In protecting pipe.
It is preferred that, present invention additionally comprises warning device, described warning device is connected with control unit.
It is preferred that, described warning device includes sound, light alarm device.
The beneficial effects of the invention are as follows：Can be timely by installing first ammonium liquid density type analyzer in urea synthesizer outlet line
Ammonia/carbon ratio in synthetic tower is reacted, is adjusted in time to entering urea synthesizer liquefied ammonia, carbon dioxide flow, urea yield is improved,
Ammonia and steam consumption is greatly lowered, it is ensured that the stability of urea synthesizer, it is ensured that the safe and stable operation of system.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
In figure, 1- the first carbon dioxide stream transmitters, 2- the second carbon dioxide stream transmitters, the blenders of 3- first,
4- regulating valves, 5- first ammonium liquid density type analyzers, the blenders of 6- second, 7- thermocouple thermometers, 8- the first liquefied ammonia flow transmitters,
9- the second liquefied ammonia flow transmitters, 10- the first synthetic tower pressure transmitters, 11- the second synthetic tower pressure transmitters.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to
It is as described below.
As shown in figure 1, wherein A represents carbon dioxide Trunk Line, B represents first ammonium liquid Trunk Line, and C represents liquefied ammonia Trunk Line, D
Represent synthetic tower outlet Trunk Line.
A kind of novel urea ammonia/carbon ratio control device, it includes synthetic tower, Trunk Line, regulating valve 4, flow transmitter, first
Ammonium liquid density type analyzer 5, pressure transmitter, thermocouple thermometer 7, blender, control unit；
Described flow transmitter include the first carbon dioxide stream transmitter 1, the second carbon dioxide stream transmitter 2,
First liquefied ammonia flow transmitter 8 and the second liquefied ammonia flow transmitter 9；
Described blender includes the first blender 3 and the second blender 6；
Described Trunk Line includes carbon dioxide Trunk Line, first ammonium liquid Trunk Line, liquefied ammonia Trunk Line and synthetic tower outlet master
Pipeline；
Carbon dioxide Trunk Line is connected by the first blender 3 with synthetic tower, liquefied ammonia Trunk Line respectively with the second blender 6
It is connected with synthetic tower, the second blender 6 is also respectively connected with first ammonium liquid Trunk Line and the first blender 3；First blender 3 and synthesis
Tower is connected, and liquefied ammonia Trunk Line is connected with the second blender 6 and synthetic tower respectively, mainly by first ammonium liquid, liquefied ammonia, carbon dioxide three
Plant after medium is well mixed and enter synthetic tower, synthetic tower interior energy is fully reacted；Second blender 6 connects first ammonium liquid supervisor respectively
Line, liquefied ammonia Trunk Line and the first blender 3；Make entering back into the first blender 3 and dioxy after first ammonium liquid and liquefied ammonia are well mixed
Change carbon mixing；
First ammonium pump is provided with described first ammonium liquid Trunk Line, regulating valve 4 is arranged on synthetic tower outlet Trunk Line, first
The carbon dioxide stream transmitter 2 of carbon dioxide stream transmitter 1 and second is arranged on carbon dioxide Trunk Line, the first flows of liquid ammonia
The liquefied ammonia flow transmitter 9 of transmitter 8 and second is arranged on liquefied ammonia Trunk Line；First ammonium liquid density type analyzer 5 is arranged on synthesis
On tower outlet Trunk Line, first ammonium liquid density type analyzer 5 is the tester of measurement methylamine density, by analyzing the proportion of methylamine, is transported
With mathematical modeling, then the flow of computing, output regulation liquefied ammonia and carbon dioxide is carried out by DCS, reaches the proportioning of reasonable science,
Energy-conservation is further realized, the present invention can react in synthetic tower ammonia/carbon ratio in time to work by installing first ammonium liquid density type analyzer 5
Condition is adjusted, and improves urea yield, ammonia and steam consumption is greatly lowered, the stability of synthetic tower can be kept well,
Guarantee system safety；Thermocouple thermometer 7 is arranged on synthesis tower side wall；
Described flow transmitter, pressure transmitter, first ammonium liquid density type analyzer 5, thermocouple thermometer 7 and regulating valve 4
It is connected with control unit；
The first described carbon dioxide stream transmitter 1 and the second carbon dioxide stream transmitter 2 are temperature, pressure, difference
Press and open 2 holes on three-in-one transmitter, place carbon dioxide Trunk Line and be respectively connected to the first carbon dioxide with stainless steel pressure guiding pipe
The carbon dioxide stream transmitter 2 of flow transmitter 1 and second；Can be timely by installing the three-in-one transmitter of temperature, pressure, differential pressure
Monitor carbon dioxide flow；Differential pressure transmitter monitors liquefied ammonia flow in time；Operating mode is adjusted, synthesis can be kept well
The stability of tower, it is ensured that system safety；
The first described liquefied ammonia flow transmitter 8 and the second liquefied ammonia flow transmitter 9 are differential pressure transmitter, in liquefied ammonia supervisor
On line 2 holes are respectively opened before and after the double impulse built-in orificeplates of installation stainless steel, orifice plate；Import is positive pressure side, is exported as suction side, difference
The positive and negative both sides of the first liquefied ammonia flow transmitter 8 and the second liquefied ammonia flow transmitter 9 are introduced with stainless steel pressure guiding pipe；Described stream
Transmitter is temperature, pressure, the three-in-one transmitter of differential pressure, by temperature, pressure, differential pressure Cheng Yi transmitter of three kinds of parameter sets
Upper to be compensated automatically, display flow is operating mode real traffic, easy for installation, can reduce the installation of primary instrument, calculates electromechanical
Cable, DCS fastener quantity, greatly reduce cost.The three-in-one flow transmitter of temperature, pressure, differential pressure also has precision high, can be interior
Compensation program is put, easily advantage is transmitted.
Described pressure transmitter includes the first synthetic tower pressure transmitter 10 and the second synthetic tower pressure transmitter 11,
Perforate introduces the first synthetic tower pressure transmitter 10 and the second synthesis pressure tower with stainless steel pressure guiding pipe respectively on liquefied ammonia Trunk Line
Transmitter 11.The present invention monitors synthesis pressure tower in time by installing pressure transmitter, passes through the stable synthetic tower internal pressure of regulating valve 4
Power, the stability of synthetic tower can be kept well, it is ensured that system safety.
Preferably, described stainless steel pressure guiding pipe is the stainless steel pressure guiding pipes of Φ 14.
Preferably, described control unit is DCS system, using DCS control systems are easy to operate, automaticity is high,
Control accuracy is high, save labour.
Preferably, described thermocouple thermometer 7 is the three one group I grades of E indexing thermocouple thermometer 7 of Φ 3, using three choosings
Two mode is compared, it is ensured that temperature is shown reliably, accurately.
Preferably, the preferred 600mm of 500mm~700mm in the insertion of thermocouple thermometer 7 tower, survey urea synthesizer Ta Neiwen
Degree is accurate.
Preferably, synthetic tower sidewall weld has 500mm~700mm in thermometric protecting pipe, thermometric protecting pipe insertion tower preferred
600mm, the length of thermocouple thermometer 7 is consistent with the length of thermometric protecting pipe, the insertion thermometric protecting pipe of thermocouple thermometer 7
It is interior.
Preferably, present invention additionally comprises warning device, described warning device is connected with control unit.
Preferably, described warning device includes sound, light alarm device.
Pressure is equal to synthesis pressure tower, first liquefied ammonia pressure transmitter (the first synthetic tower on liquefied ammonia Trunk Line of the present invention
Pressure transmitter 10), signal input control system is (preferably for the second liquefied ammonia pressure transmitter (the second synthetic tower pressure transmitter 11)
DCS control systems), the first liquefied ammonia pressure transmitter of selection or the second liquefied ammonia pressure transmitter signal are used as the given of regulating valve 4
Signal.
Control unit outputs signal to regulating valve 4, and regulating valve 4 is opened greatly or turned down to control to synthesize pressure tower；Described
Regulating valve 4 is arranged on synthetic tower outlet Trunk Line, using special high-pressure valve, easy to adjust, zero leakage.
The described three one group I grades of E indexing thermocouples of Φ 3 are arranged on synthetic tower side (600mm in insertion tower)：In synthesis
Thermometric protecting pipe (600mm in insertion tower) is welded on synthetic tower by tower lateral opening hole, and three one group I grades of E indexes the thermocouples of Φ 3
It is inserted into protecting pipe.
Described first ammonium liquid density type analyzer 5 is arranged on the Trunk Line of synthetic tower outlet, using thermoelectricity radiographic density point
Analyzer is detected, during on-line analysis, and analyzer will produce the input signal of a requirement, be defeated by automatic control system, according to
Density is shown to control the flow of ammonia and carbon dioxide.
The present invention can also be alarmed by the warning device being connected with control unit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, it is noted that all
Any modifications, equivalent substitutions and improvements made within the spirit and principles in the present invention etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (8)
1. a kind of novel urea ammonia/carbon ratio control device, it is characterised in that：It includes synthetic tower, Trunk Line, regulating valve, flow
Transmitter, first ammonium liquid density type analyzer, pressure transmitter, thermocouple thermometer, blender, control unit；
Described flow transmitter includes the first carbon dioxide stream transmitter, the second carbon dioxide stream transmitter, the first liquid
Ammonia flow transmitter and the second liquefied ammonia flow transmitter；
Described blender includes the first blender and the second blender；
Described Trunk Line includes carbon dioxide Trunk Line, first ammonium liquid Trunk Line, liquefied ammonia Trunk Line and synthetic tower outlet Trunk Line；
Carbon dioxide Trunk Line is connected by the first blender with synthetic tower, liquefied ammonia Trunk Line respectively with the second blender and synthesis
Tower is connected, and the second blender is also respectively connected with first ammonium liquid Trunk Line and the first blender；
First ammonium pump is provided with described first ammonium liquid Trunk Line, regulating valve is arranged on synthetic tower outlet Trunk Line, the first dioxy
Change carbon flow transmitter and the second carbon dioxide stream transmitter is arranged on carbon dioxide Trunk Line, the first flows of liquid ammonia quantitative change is sent
Device and the second liquefied ammonia flow transmitter are arranged on liquefied ammonia Trunk Line, and first ammonium liquid density type analyzer is arranged on synthetic tower outlet supervisor
On line, thermocouple thermometer is arranged on synthesis tower side wall；
Described flow transmitter, pressure transmitter, first ammonium liquid density type analyzer, thermocouple thermometer and regulating valve with control
Unit is connected；
The first described carbon dioxide stream transmitter and the second carbon dioxide stream transmitter are that temperature, pressure, differential pressure three are closed
2 holes are opened on one transmitter, place carbon dioxide Trunk Line, and the first carbon dioxide stream quantitative change is respectively connected to stainless steel pressure guiding pipe
Send device and the second carbon dioxide stream transmitter；
The first described liquefied ammonia flow transmitter and the second liquefied ammonia flow transmitter are differential pressure transmitter, are pacified on liquefied ammonia Trunk Line
2 holes are respectively opened before and after the double impulse built-in orificeplates of dress stainless steel, orifice plate；Import is positive pressure side, is exported as suction side, respectively with stainless
Steel pressure guiding pipe introduces the positive and negative both sides of the first liquefied ammonia flow transmitter and the second liquefied ammonia flow transmitter；
Described pressure transmitter includes the first synthetic tower pressure transmitter and the second synthetic tower pressure transmitter, in liquefied ammonia supervisor
Perforate introduces the first synthetic tower pressure transmitter and the second synthetic tower pressure transmitter with stainless steel pressure guiding pipe respectively on line.
2. a kind of novel urea ammonia/carbon ratio control device according to claim 1, it is characterised in that：Described stainless steel
Pressure guiding pipe is the stainless steel pressure guiding pipes of Φ 14.
3. a kind of novel urea ammonia/carbon ratio control device according to claim 1, it is characterised in that：Described control list
Member is DCS system.
4. a kind of novel urea ammonia/carbon ratio control device according to claim 1 or 2 or 3, it is characterised in that：Described
Electric thermo-couple temperature is calculated as the three one group I grades of E indexing thermocouple thermometer of Φ 3.
5. a kind of novel urea ammonia/carbon ratio control device according to claim 4, it is characterised in that：Thermocouple thermometer
Insert 500mm~700mm in tower.
6. a kind of novel urea ammonia/carbon ratio control device according to claim 5, it is characterised in that：Synthesize tower side wall weldering
It is connected to 500mm~700mm, length and the thermometric protecting pipe of thermocouple thermometer in thermometric protecting pipe, thermometric protecting pipe insertion tower
Length it is consistent, in thermocouple thermometer insertion thermometric protecting pipe.
7. a kind of novel urea ammonia/carbon ratio control device according to claim 1 or 6, it is characterised in that：It also includes report
Alarm device, described warning device is connected with control unit.
8. a kind of novel urea ammonia/carbon ratio control device according to claim 7, it is characterised in that：Described alarm dress
Put including sound, light alarm device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710599286.3A CN107272756B (en) | 2017-07-21 | 2017-07-21 | Novel urea ammonia/carbon ratio control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710599286.3A CN107272756B (en) | 2017-07-21 | 2017-07-21 | Novel urea ammonia/carbon ratio control device |
Publications (2)
| Publication Number | Publication Date |
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| CN107272756A true CN107272756A (en) | 2017-10-20 |
| CN107272756B CN107272756B (en) | 2023-04-18 |
Family
ID=60079383
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710599286.3A Active CN107272756B (en) | 2017-07-21 | 2017-07-21 | Novel urea ammonia/carbon ratio control device |
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|---|---|---|---|---|
| EP0059516A1 (en) * | 1981-02-28 | 1982-09-08 | Unie Van Kunstmestfabrieken B.V. | Process for the removal of urea, ammonia and carbon dioxide from dilute aqueous solutions |
| CN101045699A (en) * | 2006-11-17 | 2007-10-03 | 张立强 | Whole liquid phase isothermal urea synthesis method and its special equipment |
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| EP0059516A1 (en) * | 1981-02-28 | 1982-09-08 | Unie Van Kunstmestfabrieken B.V. | Process for the removal of urea, ammonia and carbon dioxide from dilute aqueous solutions |
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| CN107272756B (en) | 2023-04-18 |
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