CN214892164U - System for preparing liquid carbon dioxide - Google Patents
System for preparing liquid carbon dioxide Download PDFInfo
- Publication number
- CN214892164U CN214892164U CN202120020587.8U CN202120020587U CN214892164U CN 214892164 U CN214892164 U CN 214892164U CN 202120020587 U CN202120020587 U CN 202120020587U CN 214892164 U CN214892164 U CN 214892164U
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- CN
- China
- Prior art keywords
- liquid
- pipeline
- carbon dioxide
- gas
- ammonia
- 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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- 239000007788 liquid Substances 0.000 title claims abstract description 75
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 49
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 24
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 108
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 46
- 238000003860 storage Methods 0.000 claims abstract description 19
- 238000000746 purification Methods 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims description 21
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 8
- 239000003507 refrigerant Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 5
- 238000001802 infusion Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 description 4
- PPBAJDRXASKAGH-UHFFFAOYSA-N azane;urea Chemical compound N.NC(N)=O PPBAJDRXASKAGH-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0027—Oxides of carbon, e.g. CO2
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
- F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0203—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle
- F25J1/0204—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a single-component refrigerant [SCR] fluid in a closed vapor compression cycle as a single flow SCR cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0244—Operation; Control and regulation; Instrumentation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/80—Separating impurities from carbon dioxide, e.g. H2O or water-soluble contaminants
- F25J2220/82—Separating low boiling, i.e. more volatile components, e.g. He, H2, CO, Air gases, CH4
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2270/00—Refrigeration techniques used
- F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Gas Separation By Absorption (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The utility model provides a system for prepare liquid carbon dioxide, includes ammonia cooler, purification tower, liquid storage tank, and this system make full use of the surplus ability of former chemical plant equipment, and the equipment that this system used is few, and process flow is short, and the construction investment is few, area is little. Make full use of CO of the original chemical plant2Tail gas and rich cold energy, greatly reduces unit production energy consumption and comprehensive production cost, and increases liquid CO2The product improves the economic benefit of enterprises. CO utilizing a primary chemical plant2Tail gas is changed into valuable, liquid carbon dioxide is produced, the emission of carbon dioxide gas is reduced, and the clean production of chemical devices is promoted.
Description
Technical Field
The utility model relates to an ammonia-urea chemical production field, concretely relates to system for prepare liquid carbon dioxide.
Background
The traditional process flow system for preparing liquid carbon dioxide needs to be provided with an ice maker, an ammonia storage tank and CO2A compressor, a fine desulfurization tank, a purification tower, a cooler, a low-temperature storage tank, a low-temperature pump and other devices.
The gas ammonia is changed into liquid ammonia through the working procedures of cooling, compression, storage and the like, then gasified by an ammonia cooler, and then returned to the ice maker system again; gaseous CO2The ammonia is liquefied in an ammonia cooler after the procedures of fine desulfurization, dehydrogenation, compression, cooling and the like, and then liquid CO is obtained2After flash evaporation in the purification tower, the liquid is stored in a liquid storage tank.
The traditional process system has the disadvantages of multiple processes, multiple devices, long flow, multiple control points, complex operation, large occupied area, high investment and energy consumption, and moreover, the operation mode is backward and the product quality is unstable.
Disclosure of Invention
The utility model provides a CO which relies on a synthetic ammonia-urea system to overcome the defects of the prior art2Tail gas and abundant cold energy are changed into valuable substances, liquid carbon dioxide is produced, the economic value is improved, and the emission of carbon dioxide gas is reduced.
The utility model overcomes the technical scheme that its technical problem adopted is:
a system for producing liquid carbon dioxide, comprising:
the ammonia cooler has refrigerant inlet connected to the branch of the liquid ammonia pipeline in the four section of the ice maker via liquid ammonia pipeline, refrigerant outlet connected to the branch of the gas ammonia pipeline in the one section of the ice maker via gas ammonia pipeline, and gas inlet connected via CO gas2Pipe connection to CO2A second compressor section;
purification column with liquid CO passing through its inlet end2The pipeline is connected with a liquid outlet of the ammonia cooler, and a gas outlet at the top of the pipeline is connected with a torch through a flash evaporation gas pipeline;
the inlet end of the liquid storage tank is connected with the outlet end at the bottom of the purification tower through a liquid conveying pipe, the outlet end at the bottom of the liquid storage tank is connected with the inlet end of the pump through a liquid pumping pipe, and the outlet end of the pump is connected with the liquid outlet pipe.
Further, be provided with flow control valve I on the above-mentioned liquid ammonia pipeline.
Further, the above gas CO2And a flow regulating valve II is arranged on the pipeline.
Furthermore, a pressure regulating valve I is arranged on the gas ammonia pipeline.
Further, still including connecting in the cold ware top of ammonia relief valve I, the gas outlet of relief valve I is connected in ammonia recovery pipeline.
Further, the above liquid CO2The pipeline is provided with a gate valve.
Furthermore, a flow regulating valve III is arranged on the infusion tube.
Furthermore, a pressure regulating valve II is arranged on the flash steam pipeline.
Furthermore, the top of the liquid storage tank is connected with a safety valve II.
The utility model has the advantages that: the surplus capacity of the original chemical plant equipment is fully utilized, the system has the advantages of less used equipment, short process flow, less construction investment and small occupied area. Make full use of CO of the original chemical plant2Tail gas and rich cold energy, greatly reduces unit production energy consumption and comprehensive production cost, and increases liquid CO2The product improves the economic benefit of enterprises. CO utilizing a primary chemical plant2Tail gas is changed into valuable, liquid carbon dioxide is produced, the emission of carbon dioxide gas is reduced, and the clean production of chemical devices is promoted.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure, 1 is an ammonia cooler 2, a liquid ammonia pipeline 3, a flow regulating valve I4, liquid CO2Pipeline 5, gate valve 6, gas CO2The system comprises a pipeline 7, a flow regulating valve II 8, a gas ammonia pipeline 9, a pressure regulating valve I10, a safety valve I11, an ammonia recovery pipeline 12, a purification tower 13, a liquid conveying pipe 14, a flow regulating valve III 15, a flash evaporation gas pipeline 16, a pressure regulating valve II 17, a liquid storage tank 18, a safety valve II 19, a liquid pumping pipe 20, a pump 21 and a liquid outlet pipe.
Detailed Description
The present invention will be further explained with reference to fig. 1.
A system for producing liquid carbon dioxide, comprising: an ammonia cooler 1, the refrigerant inlet of which is connected with the branch of the four-section outlet liquid ammonia pipeline of the ice machine through a liquid ammonia pipeline 2, the refrigerant outlet of which is connected with the branch of the one-section inlet gas ammonia pipeline of the ice machine through a gas ammonia pipeline 8, and the gas inlet of which is connected with the branch of the one-section inlet gas ammonia pipeline of the ice machine through gas CO2The pipe 6 is connected to CO2A second compressor section; a purification column 12, the inlet end of which is passed liquid CO2The pipeline 4 is connected with the liquid outlet of the ammonia cooler 1, and the gas outlet at the top of the pipeline is connected with a torch through a flash evaporation gas pipeline 15; the inlet of liquid storage tank 17 is connected to the outlet at the bottom of purification column 12 via liquid pipe 13, the outlet at the bottom is connected to the inlet of pump 20 via liquid suction pipe 19, and the outlet of pump 20 is connected to liquid outlet pipe 21. CO 22CO to be compressed by a compressor2Gas passing gas CO2The pipeline 6 is conveyed into the ammonia cooler 1, and liquid ammonia formed after the ice maker refrigerates the ammonia gas is conveyed into the ammonia cooler 1 through the liquid ammonia pipeline 2 and is mixed with CO2Heat exchange of gas to convert CO2Cooling the gas to liquid CO2The liquid ammonia after heat exchange is changed into gas ammonia and flows back to the ice maker through a gas ammonia pipeline 8 to realize circulation, and liquid CO2By liquid CO2The line 4 flows into a purification column 12 for flashing to liquid CO2H in (1)2、O2、N2The non-condensable gas is discharged through a flash evaporation gas pipeline 15 and conveyed to a torch. Liquid CO after flash evaporation2Is delivered to a liquid storage tank 17 through a liquid delivery pipe 13 for storage, and liquid CO is used when needed2At this time, pump 20 is started to pump liquid from liquid tank 17 through liquid suction pipe 19 and then discharged for use through liquid discharge pipe 21. The surplus capacity of the original chemical plant equipment is fully utilized, the system has the advantages of less used equipment, short process flow, less construction investment and small occupied area. Make full use of CO of the original chemical plant2Tail gas and rich cold energy, greatly reduces unit production energy consumption and comprehensive production cost, and increases liquid CO2The product improves the economic benefit of enterprises. CO utilizing a primary chemical plant2Tail gas is changed into valuable, liquid carbon dioxide is produced,the emission of carbon dioxide gas is reduced, and the clean production of a chemical device is promoted.
Further, be provided with flow control valve I3 on liquid ammonia pipeline 2. The flow of the liquid ammonia input into the ammonia cooler 1 can be controlled through the flow regulating valve I3, so that the CO in the ammonia cooler 1 can be controlled2The cooling rate of (2).
Further, CO gas2And a flow regulating valve II 7 is arranged on the pipeline 6. CO input into the ammonia cooler 1 can be controlled through a flow control valve II 72The flow rate of the gas.
Further, a pressure regulating valve I9 is arranged on the gas ammonia pipeline 8. The pressure of the gaseous ammonia supplied from the gaseous ammonia line 8 can be adjusted by the pressure regulating valve I9.
Further, the device also comprises a safety valve I10 connected to the top of the ammonia cooler 1, and the gas outlet of the safety valve I10 is connected to an ammonia recovery pipeline 11. When the pressure of the gaseous ammonia in the ammonia cooler 1 is too high, the safety valve I10 is opened, and the gaseous ammonia in the ammonia cooler 1 can be recovered through the ammonia recovery pipeline 11, so that the safety of the system is improved.
Further, liquid CO2The pipe 4 is provided with a gate valve 5. When the system is overhauled, the gate valve 5 can be closed, so that the communication between the ammonia cooler 1 and the purification tower 12 is cut off, and safe replacement and overhaul are facilitated.
Further, the infusion tube 13 is provided with a flow rate control valve iii 14. The liquid CO entering the liquid storage tank 17 from the purification tower 12 can be controlled by the flow control valve III 142The speed of (2).
Further, a pressure regulating valve II 16 is arranged on the flash evaporation gas pipeline 15. The liquid CO can be regulated by the pressure regulating valve II 162And the pressure of the flash gas delivered to the flare via flash gas line 15.
Further, a safety valve II 18 is connected to the top of the liquid storage tank 17. When the pressure in the liquid storage tank 17 is too high, the safety valve II 18 is opened, the liquid storage tank 17 is unloaded, and the safety of the system is improved.
The above description is only the preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention is included in the protection scope of the present invention.
Claims (9)
1. A system for producing liquid carbon dioxide, comprising:
the ammonia cooler (1) has its refrigerant inlet connected to the branch of the ice machine four-section outlet liquid ammonia pipeline via liquid ammonia pipeline (2), its refrigerant outlet connected to the branch of the ice machine one-section inlet gas ammonia pipeline via gas ammonia pipeline (8), and its gas inlet connected via gas CO2The pipe (6) is connected to CO2A second compressor section;
a purification column (12) with an inlet end for passing liquid CO2The pipeline (4) is connected with a liquid outlet of the ammonia cooler (1), and a gas outlet at the top of the pipeline is connected with a torch through a flash evaporation gas pipeline (15);
and the inlet end of the liquid storage tank (17) is connected to the outlet end at the bottom of the purification tower (12) through a liquid conveying pipe (13), the outlet end at the bottom of the liquid storage tank is connected to the inlet end of a pump (20) through a liquid pumping pipe (19), and the outlet end of the pump (20) is connected to a liquid outlet pipe (21).
2. The system for producing liquid carbon dioxide according to claim 1, wherein: and a flow regulating valve I (3) is arranged on the liquid ammonia pipeline (2).
3. The system for producing liquid carbon dioxide according to claim 1, wherein: said gas CO2And a flow regulating valve II (7) is arranged on the pipeline (6).
4. The system for producing liquid carbon dioxide according to claim 1, wherein: and a pressure regulating valve I (9) is arranged on the gas ammonia pipeline (8).
5. The system for producing liquid carbon dioxide according to claim 1, wherein: still including connecting in the relief valve I (10) of ammonia cooler (1) top, the gas outlet of relief valve I (10) is connected in ammonia recovery pipeline (11).
6. The system for producing liquid carbon dioxide according to claim 1, wherein: the liquid CO2The pipeline (4) is provided with a gate valve (5).
7. The system for producing liquid carbon dioxide according to claim 1, wherein: and a flow regulating valve III (14) is arranged on the infusion tube (13).
8. The system for producing liquid carbon dioxide according to claim 1, wherein: and a pressure regulating valve II (16) is arranged on the flash evaporation gas pipeline (15).
9. The system for producing liquid carbon dioxide according to claim 1, wherein: the top of the liquid storage tank (17) is connected with a safety valve II (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120020587.8U CN214892164U (en) | 2021-01-06 | 2021-01-06 | System for preparing liquid carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120020587.8U CN214892164U (en) | 2021-01-06 | 2021-01-06 | System for preparing liquid carbon dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214892164U true CN214892164U (en) | 2021-11-26 |
Family
ID=78863917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120020587.8U Active CN214892164U (en) | 2021-01-06 | 2021-01-06 | System for preparing liquid carbon dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214892164U (en) |
-
2021
- 2021-01-06 CN CN202120020587.8U patent/CN214892164U/en active Active
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