CN212222831U - Carbon dioxide conversion system in methanol preparation process from coal - Google Patents

Carbon dioxide conversion system in methanol preparation process from coal Download PDF

Info

Publication number
CN212222831U
CN212222831U CN202021034431.7U CN202021034431U CN212222831U CN 212222831 U CN212222831 U CN 212222831U CN 202021034431 U CN202021034431 U CN 202021034431U CN 212222831 U CN212222831 U CN 212222831U
Authority
CN
China
Prior art keywords
unit
methanol
coal
outlet
inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202021034431.7U
Other languages
Chinese (zh)
Inventor
马福宝
刘蓉
温彦博
徐庆
王晓龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gansu Huating Coal Power Co ltd Coal To Methanol Branch
Huaneng Clean Energy Research Institute
Original Assignee
Gansu Huating Coal Power Co ltd Coal To Methanol Branch
Huaneng Clean Energy Research Institute
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gansu Huating Coal Power Co ltd Coal To Methanol Branch, Huaneng Clean Energy Research Institute filed Critical Gansu Huating Coal Power Co ltd Coal To Methanol Branch
Priority to CN202021034431.7U priority Critical patent/CN212222831U/en
Application granted granted Critical
Publication of CN212222831U publication Critical patent/CN212222831U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • 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
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The utility model discloses a carbon dioxide conversion system for methanol preparation process from coal belongs to coal chemical industry technical field. Comprises a coal preparation unit, a coal gasification unit, a water gas conversion unit, a synthesis gas cooling unit, a low-temperature methanol washing unit, a synthesis gas-to-methanol unit, a water treatment unit, a waste heat power generation unit, an electrolytic hydrogen production unit, a CO unit2The device comprises a methanol preparation unit, a methanol rectification unit, a hydrogen collection unit, an oxygen collection unit, an air separation unit and a sulfur recovery unit. CO generated in the process of preparing methanol from coal2Conversion in situ to methanol product, CO2The conversion product is methanol, the low-temperature waste heat of the coal gasification and synthesis gas cooling unit is used for generating electricity to provide electric energy for hydrogen production by electrolysis, pure oxygen generated in the hydrogen production process by electrolysis is used in the coal gasification unit, the yield of methanol is high, and CO is high2The emission is low, the equipment investment and the operation cost are reduced, the energy in the process is effectively utilized, the energy is saved, and the method has a good application prospect.

Description

Carbon dioxide conversion system in methanol preparation process from coal
Technical Field
The utility model belongs to the technical field of the coal chemical industry, concretely relates to coal system methyl alcohol process carbon dioxide conversion system.
Background
With the rapid development of methanol industry, CO is produced in methanol production2The amount of emissions is also increasing. In the process of preparing methanol from coal, unit product CO2The emission of CO is 3.4-5.4 tons2Per ton of methanol. Under the same production scale, compared with the production of methanol by natural gas, the coal-based methanol production has the carbon emission nearly up to 8 times. The carbon emission generated in the coal-to-methanol production process accounts for 53.38%, the carbon emission generated by the combustion of the fuel of the thermoelectric boiler accounts for 36.25%, and the carbon emission caused by the net purchased power consumption accounts for 10.36%. It can be seen that direct carbon emissions are the predominant CO2Emission source, CO2The space for emission reduction and utilization is large. Therefore, the research on carbon capture and utilization in the process of preparing methanol from coal is of great significance。
At present, in projects of synthesizing ammonia from large-scale coal, synthesizing methanol from coal and the like, a large amount of CO in tail gas2Because the low concentration is directly discharged, not only a large amount of greenhouse gas is discharged, but also CO is generated2The waste of resources. For recovering CO discharged from tail gas2PSA recovery or MEA, MDEA and the like can be adopted, and even the raw material gas can be directly compressed and returned, but the trapping equipment is required to be additionally added, and the energy consumption is larger.
Disclosure of Invention
In order to solve the defects existing in the prior art, the utility model aims to provide a carbon dioxide conversion system for the methanol preparation process from coal, which has high methanol yield and CO yield2Low emission, reduced equipment investment, effective utilization of energy in the process and energy conservation.
The utility model discloses a following technical scheme realizes:
the utility model discloses a carbon dioxide conversion system in methanol preparation process from coal, including preparing coal unit, coal gasification unit, water gas shift unit, synthetic gas cooling unit, low temperature methyl alcohol washing unit, synthetic gas system methyl alcohol unit, water treatment unit, waste heat power generation unit, electrolysis hydrogen manufacturing unit, CO2The system comprises a methanol preparation unit, a methanol rectification unit, a hydrogen collection unit, an oxygen collection unit, an air separation unit and a sulfur recovery unit;
the outlet of the coal preparation unit is connected with the coal raw material inlet of the coal gasification unit, the air separation unit is connected with an air inlet pipe, and the O of the air separation unit2Outlet to coal gasification unit O2The coal gas outlet of the coal gasification unit is connected with the inlet of the water gas shift unit, the synthesis gas outlet of the water gas shift unit is connected with the inlet of the synthesis gas cooling unit, the outlet of the synthesis gas cooling unit is connected with the inlet of the low-temperature methanol washing unit, the synthesis gas outlet of the low-temperature methanol washing unit is connected with the inlet of the synthesis gas methanol preparation unit, and the CO of the low-temperature methanol washing unit2Outlet and CO2CO of methanol preparation unit2Inlet connection, low temperature methanol wash unit H2S outlet is connected with sulfur recovery unit, and synthesis is carried outOutlet of gas to methanol unit and CO2The outlets of the methanol preparation units are connected with the inlet of the methanol rectification unit; the waste water outlet of the coal gasification unit is connected with the inlet of the water treatment unit, the outlet of the water treatment unit is connected with the water inlets of the electrolytic hydrogen production unit and the coal gasification unit, and the O of the electrolytic hydrogen production unit2The outlet is connected with the inlet of the oxygen collecting unit, and the outlet of the oxygen collecting unit is connected with the outlet of the coal gasification unit2Inlet connection, electrolysis hydrogen production unit H2The outlet is connected with the inlet of the hydrogen collecting unit, and the outlet of the hydrogen collecting unit is connected with CO2H of methanol preparation unit2An inlet connection; the coal gasification unit and the synthesis gas cooling unit are connected with the waste heat power generation unit through a waste heat pipeline, and the waste heat power generation unit is connected with the electrolytic hydrogen production unit through a power transmission line.
Preferably, CO2Gas outlet and CO of methanol production unit2CO of methanol preparation unit2The inlet is connected.
Preferably, CO2And control valves are arranged on connecting pipelines of the methanol preparation unit, the low-temperature methanol washing unit and the hydrogen collection unit.
Preferably, a control valve is arranged on a connecting pipeline between the water treatment unit and the electrolytic hydrogen production unit and between the water treatment unit and the coal gasification unit.
Preferably, the methanol rectification unit and the synthesis gas methanol-to-methanol unit and the CO2Control valves are arranged on connecting pipelines between the methanol preparation units.
Preferably, control valves are arranged on connecting pipelines of the coal gasification unit, the oxygen collection unit and the air separation unit.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a carbon dioxide conversion system for methanol preparation process from coal, which is used for converting CO generated in the methanol preparation process from coal2The methanol product is converted on site, thereby not only improving the yield of the methanol product prepared from coal, but also realizing CO2And (4) low emission. CO 22In situ conversion of CO2Cost input of the capture equipment; CO 22The product is converted into methanol without adding new purification equipment, and can be directly purifiedThe existing methanol rectification unit is utilized, so that the equipment investment is reduced; the coal gasification and low-temperature waste heat of the synthesis gas cooling unit are used for generating electricity, so that electric energy is provided for hydrogen production by electrolysis, extra electric power input is not needed, and energy consumption and production cost are reduced; pure oxygen generated in the hydrogen production process by electrolysis is used for the coal gasification unit, so that the load of the air separation unit of the system is reduced, the production and operation cost is reduced, and the method has a good application prospect.
Further, CO2Gas outlet and CO of methanol production unit2Methanol preparation unit CO2Inlet connection, incompletely reacted CO2The recycling and the utilization rate of energy sources are improved.
Further, CO2Control valves are arranged on connecting pipelines of the methanol preparation unit, the low-temperature methanol washing unit and the hydrogen collection unit, and can cooperatively control CO2The reaction speed of the methanol preparation unit controls the progress of the whole system.
Furthermore, a control valve is arranged on a connecting pipeline between the water treatment unit and the electrolytic hydrogen production unit and between the water treatment unit and the coal gasification unit, most of water from the water treatment unit is generally circulated back to the coal gasification unit, and a small part of water enters the electrolytic hydrogen production unit, and the water quantities in the two pipelines can be coordinated through the control valve, so that the process of the whole system is controlled.
Further, a methanol rectification unit, a methanol-to-synthesis gas unit and CO2And control valves are arranged on connecting pipelines between the methanol preparation units, so that the amount of crude methanol entering the methanol rectification unit can be controlled, and the process of the whole system is controlled.
Furthermore, the connecting pipelines of the coal gasification unit, the oxygen collection unit and the air separation unit are respectively provided with a control valve, so that the oxygen amount in the coal gasification unit can be cooperatively controlled, and when the oxygen in the oxygen collection unit meets the requirement of the coal gasification unit, the preferential use is realized, and the operating cost of the air separation unit is saved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the carbon dioxide conversion system in the process of preparing methanol from coal.
In the figure: 1 is coal preparation sheetThe unit comprises a coal gasification unit 2, a water gas conversion unit 3, a synthesis gas cooling unit 4, a low-temperature methanol washing unit 5, a synthesis gas methanol preparation unit 6, a water treatment unit 7, a waste heat power generation unit 8, an electrolytic hydrogen production unit 9 and a CO (carbon monoxide) unit 102The device comprises a methanol preparation unit, a methanol rectification unit 11, a hydrogen collection unit 12, an oxygen collection unit 13, an air separation unit 14 and a sulfur recovery unit 15.
Detailed Description
The invention will be described in further detail with reference to the following drawings and specific examples, which are intended to illustrate and not to limit the invention:
as shown in FIG. 1, the carbon dioxide conversion system for methanol preparation from coal of the present invention comprises a coal preparation unit 1, a coal gasification unit 2, a water gas shift unit 3, a syngas cooling unit 4, a low temperature methanol washing unit 5, a methanol preparation from syngas unit 6, a water treatment unit 7, a waste heat power generation unit 8, an electrolytic hydrogen production unit 9, a CO generation unit2A methanol preparation unit 10, a methanol rectification unit 11, a hydrogen collection unit 12, an oxygen collection unit 13, an air separation unit 14 and a sulfur recovery unit 15;
the outlet of the coal preparation unit 1 is connected with the coal material inlet of the coal gasification unit 2, the air inlet pipe is connected with the air separation unit 14, and the O of the air separation unit 142Outlet to coal gasification unit 2O2The coal gas outlet of the coal gasification unit 2 is connected with the inlet of the water gas shift unit 3, the synthesis gas outlet of the water gas shift unit 3 is connected with the inlet of the synthesis gas cooling unit 4, the outlet of the synthesis gas cooling unit 4 is connected with the inlet of the low-temperature methanol washing unit 5, the synthesis gas outlet of the low-temperature methanol washing unit 5 is connected with the inlet of the synthesis gas methanol preparation unit 6, and the CO of the low-temperature methanol washing unit 52Outlet and CO2CO of methanol production unit 102Inlet connection, low temperature methanol wash unit 5H2The S outlet is connected with the sulfur recovery unit 15, the outlet of the synthesis gas methanol preparation unit 6 and CO2The outlets of the methanol preparation units 10 are connected with the inlet of the methanol rectification unit 11; preferably, CO2The gas outlet of the methanol preparation unit 10 is provided with a circulating branch and CO2Of methanol production unit 10CO2Inlet connection to incompletely reacted CO2And recycling is carried out. The wastewater outlet of the coal gasification unit 2 is connected with the inlet of the water treatment unit 7, the outlet of the water treatment unit 7 is connected with the water inlets of the electrolytic hydrogen production unit 9 and the coal gasification unit 2, and the O of the electrolytic hydrogen production unit 92The outlet is connected to the inlet of an oxygen collection unit 13, and the outlet of the oxygen collection unit 13 is connected to the O of the coal gasification unit 22Inlet connection, H of electrolytic hydrogen production unit 92The outlet is connected with the inlet of the hydrogen collecting unit 12, and the outlet of the hydrogen collecting unit 12 is connected with CO2H of methanol production unit 102An inlet connection; the coal gasification unit 2 and the synthesis gas cooling unit 4 are connected with a waste heat power generation unit 8 through a waste heat pipeline, and the waste heat power generation unit 8 is connected with an electrolytic hydrogen production unit 9 through a power transmission line.
Preferably in CO2Control valves are arranged on connecting pipelines of the methanol preparation unit 10, the low-temperature methanol washing unit 5 and the hydrogen collecting unit 12 and are used for cooperatively controlling CO2Reaction rate of the methanol production unit 10. A control valve is arranged on a connecting pipeline between the water treatment unit 7 and the electrolytic hydrogen production unit 9 and the coal gasification unit 2, most of water from the water treatment unit 7 is generally circulated back to the coal gasification unit 2, and a small part of water enters the electrolytic hydrogen production unit 9, and the water amount in the two pipelines can be coordinated through the control valve. Methanol rectification unit 11 and synthesis gas methanol preparation unit 6 and CO2Control valves are arranged on connecting pipelines between the methanol preparation units 10, and the amount of crude methanol entering the methanol rectification unit 11 can be controlled. The connecting pipelines of the coal gasification unit 2, the oxygen collection unit 13 and the air separation unit 14 are respectively provided with a control valve, so that the oxygen amount in the coal gasification unit can be cooperatively controlled, and when the oxygen in the oxygen collection unit meets the requirement of the coal gasification unit, the oxygen collection unit is preferentially adopted, so that the operation cost of the air separation unit is saved.
The working method of the carbon dioxide conversion system in the process of preparing methanol from coal comprises the following steps:
the coal preparation unit 1 crushes, grinds or otherwise treats the raw coal according to a gasification process, electrolyzes O produced by the hydrogen production unit 92Collected by the oxygen collection unit 13 and O from the air separation unit 142The waste water produced by the coal gasification unit 2 enters a water treatment unit 7 to be treated, most of the waste water is circulated back to the coal gasification unit 2, and a small part of the waste water enters an electrolytic hydrogen production unit 9, and the circulating water treated by the water treatment unit 7 meets the technical requirements of a water electrolysis hydrogen production system (GB/T19774 and 2005); coal gas generated by the coal gasification unit 2 enters a water gas shift unit 3 to carry out water gas shift reaction to obtain synthesis gas, the synthesis gas enters a synthesis gas cooling unit 4 to be cooled and then enters a low-temperature methanol washing unit 5 to be purified, the synthesis gas obtained by purification enters a synthesis gas methanol preparation unit 6 to obtain crude methanol through catalytic reaction, and H in the synthesis gas methanol preparation unit 62The molar ratio of the carbon dioxide to CO is 2.05-2.15, and H can be ensured2Molar ratio to CO and chemical reaction equation H2+CO＝CH3The OH proportion is equivalent; hydrogen generated by the electrolytic hydrogen production unit 9 enters a hydrogen collecting unit 12 for collection, and then is mixed with CO generated by the low-temperature methanol washing unit 52Enter CO together2A methanol preparation unit 10 for obtaining crude methanol and CO through catalytic reaction2H in methanol production unit 102With CO2The molar ratio of (A) to (B) is 3.01-4.10, and H can be ensured2With CO2Molar ratio and chemical reaction equation 3H2+2CO2＝2CH3The OH proportion is excessive compared with hydrogen, and the excessive hydrogen can promote the reaction to be rapidly carried out to provide CO2Conversion and methanol yield; crude methanol and CO produced by methanol-from-syngas unit 62Crude methanol generated by the methanol preparation unit 10 enters a methanol rectification unit 11 together for purification to obtain a methanol product;
h produced by low temperature methanol washing unit 52S enters a sulfur recovery unit 15 to obtain a sulfur product; waste heat generated by the coal gasification unit 2 and the synthesis gas cooling unit 4 is introduced into the waste heat power generation unit 8 to generate power, and the generated power is transmitted to the electrolytic hydrogen production unit 9 to carry out electrolytic hydrogen production reaction.
The effect of the invention is further explained below with a specific example and a comparative example, respectively:
examples
The coal preparation unit 1 crushes, grinds or otherwise treats the raw coal according to the gasification process, and the coal feeding amount is 162.8 t/h. O produced by the electrolytic hydrogen production unit 92The coal is fed into an oxygen collection unit 13 for collection, and then fed into a coal gasification unit 2 together with the raw material coal produced by a coal preparation unit 1 and the oxygen generated by an air separation unit 14 for coal gasification reaction, and the oxygen-to-coal ratio (O/C) of the coal gasification unit 2 is adjusted to 1.01-1.05. The carbon in the coal is partially oxidized to form H2、CO、CO2And H2O and others such as H2S、CH4And the generated crude gas is washed and sent to the water gas shift unit 3 for water gas shift reaction, the wastewater generated in the washing process of the coal gasification unit 2 is sent to the water treatment unit 7, the water treatment unit 7 adopts a flocculation reaction precipitation process to remove impurities such as suspended matters and colloids in the raw water so as to enable the impurities to meet the technical requirements of water electrolysis hydrogen production, most of the treated circulating water returns to the coal gasification unit 2 for recycling, a small part of the water is sent to the electrolytic hydrogen production unit 9 for hydrogen production by electrolysis, and the circulating water sent to the electrolytic hydrogen production unit 9 for hydrogen production after being treated by the water treatment unit 7 meets the technical requirements of a water electrolysis hydrogen production system (GB/T19774-2005). The coal gas is subjected to a conversion reaction under the action of a catalyst through a conversion unit 3, wherein CO reacts with water to generate CO2And H2The conditions of the shift reaction are controlled to obtain the synthesis gas after the shift reaction, the synthesis gas is cooled by the synthesis gas cooling unit 4 and then sent to the low-temperature methanol washing unit 5 for purification treatment, and CO in the synthesis gas is removed2And H2S and other impurities are sent to a synthesis gas methanol preparation unit 6 after purification treatment, and crude methanol, H, is obtained through catalytic reaction2S is sent to the sulfur recovery unit 15. The low-temperature waste heat generated by the coal gas passing through the water gas conversion unit 3 and the synthesis gas cooling unit 4 is introduced into the waste heat power generation unit 8 for power generation, and the generated power is transmitted to the electrolytic hydrogen production unit 9 for hydrogen production reaction by water electrolysis. H produced by the electrolytic hydrogen production unit 92The CO enters a hydrogen collecting unit 12 for collection and is then removed with a low-temperature methanol washing unit 52CO is introduced together2The methanol preparation unit 10 obtains crude methanol through catalytic reaction, and adjusts H of the hydrogen collection unit 122Flow rate of CO2Molar ratio H of single raw material gas for preparing methanol2：CO23.01 to 4.10. Methanol-to-methanol unit 6 and CO from synthesis gas2The crude methanol obtained by the methanol preparation unit 10 is introduced into a methanol rectification unit 11 for purification to obtain a methanol product, and unreacted CO2From CO2The methanol preparation unit 10 is used for circulating reaction.
Detected, CO of the system2The discharge was 3098.67kmol/h and the hourly production of methanol was 73.1t.
Comparative example
The coal preparation unit 1 crushes, grinds or otherwise treats the raw coal according to the gasification process, and the coal feeding amount is 162.8 t/h. The raw material coal produced by the coal preparation unit 1 and oxygen generated by the air separation unit 14 enter the coal gasification unit 2 together for coal gasification reaction, and the oxygen-to-coal ratio (O/C) of the coal gasification unit 2 is adjusted to 1.01-1.05. The carbon in the coal is partially oxidized to form H2、CO、CO2And H2O and others such as H2S、CH4The generated crude gas is washed and sent to a water gas shift unit 3 for water gas shift reaction, the wastewater generated in the washing process of the coal gasification unit 2 is sent to a water treatment unit 7, the water treatment unit 7 adopts a flocculation reaction precipitation process to remove impurities such as suspended matters and colloids in raw water, the treated circulating water returns to the coal gasification unit 2 for recycling, the gas undergoes a shift reaction under the action of a catalyst through the water gas shift unit 3, wherein CO reacts with water to generate CO2And H2Controlling the condition of the conversion reaction to obtain the synthesis gas after conversion, cooling the synthesis gas by the synthesis gas cooling unit 4, and sending the synthesis gas to the low-temperature methanol washing unit 5 for purification treatment to remove CO in the synthesis gas2And H2S and other impurities, H2S to a sulfur recovery unit 15, CO2And (4) directly discharging. And (3) sending the purified synthesis gas to a synthesis gas methanol preparation unit 6 to obtain crude methanol through catalytic reaction, and introducing the crude methanol obtained by the synthesis gas methanol preparation unit 6 into a methanol rectification unit 11 to purify to obtain a methanol product.
CO2Directly discharged from the low-temperature methanol washing unit 5, and detected, the CO of the system2The discharge amount was 3776.3kmol/h per unitThe hourly methanol yield was 68.5 t.
Comparison shows that CO in the examples is compared with that in the comparative example2The emission can be reduced to 5 ten thousand tons per year, and the yield of the methanol can be increased to 3.6 ten thousand tons per year.
It should be noted that the above description is only a part of the embodiments of the present invention, and equivalent changes made by the system described in the present invention are all included in the protection scope of the present invention. The technical field of the present invention can be replaced by other embodiments described in a similar manner, without departing from the structure of the present invention or exceeding the scope defined by the claims, which belong to the protection scope of the present invention.

Claims (6)

1. The carbon dioxide conversion system in the process of preparing methanol from coal is characterized by comprising a coal preparation unit (1), a coal gasification unit (2), a water gas conversion unit (3), a synthesis gas cooling unit (4), a low-temperature methanol washing unit (5), a synthesis gas methanol preparation unit (6), a water treatment unit (7), a waste heat power generation unit (8), an electrolytic hydrogen production unit (9), a CO (carbon monoxide) unit, a CO (carbon dioxide) unit and a CO hydrogen production unit2A methanol preparation unit (10), a methanol rectification unit (11), a hydrogen collection unit (12), an oxygen collection unit (13), an air separation unit (14) and a sulfur recovery unit (15);
the outlet of the coal preparation unit (1) is connected with the coal raw material inlet of the coal gasification unit (2), the air separation unit (14) is connected with an air inlet pipe, and the O of the air separation unit (14)2O of the outlet and the coal gasification unit (2)2The coal gas outlet of the coal gasification unit (2) is connected with the inlet of the water gas shift unit (3), the synthesis gas outlet of the water gas shift unit (3) is connected with the inlet of the synthesis gas cooling unit (4), the outlet of the synthesis gas cooling unit (4) is connected with the inlet of the low-temperature methanol washing unit (5), the synthesis gas outlet of the low-temperature methanol washing unit (5) is connected with the inlet of the synthesis gas methanol preparation unit (6), and the CO of the low-temperature methanol washing unit (5) is connected with the inlet of the CO2Outlet and CO2CO of methanol production unit (10)2Inlet connected, low temperature methanol wash unit (5) H2The S outlet is connected with a sulfur recovery unit (15), the outlet of a synthesis gas methanol unit (6) and CO2The outlets of the methanol preparation units (10) are connected with the inlet of the methanol rectification unit (11); the wastewater outlet of the coal gasification unit (2) is connected with the inlet of the water treatment unit (7), the outlet of the water treatment unit (7) is connected with the water inlets of the electrolytic hydrogen production unit (9) and the coal gasification unit (2), and O of the electrolytic hydrogen production unit (9)2The outlet is connected with the inlet of the oxygen collecting unit (13), and the outlet of the oxygen collecting unit (13) is connected with the O of the coal gasification unit (2)2H of the inlet connection, electrolytic hydrogen production unit (9)2The outlet is connected with the inlet of the hydrogen collecting unit (12), and the outlet of the hydrogen collecting unit (12) is connected with CO2H of methanol production unit (10)2An inlet connection; the coal gasification unit (2) and the synthesis gas cooling unit (4) are connected with the waste heat power generation unit (8) through a waste heat pipeline, and the waste heat power generation unit (8) is connected with the electrolytic hydrogen production unit (9) through a power transmission line.
2. The carbon dioxide conversion system in the process of preparing methanol from coal as claimed in claim 1, wherein CO is supplied to the methanol conversion system2Gas outlet and CO of methanol production unit (10)2CO of methanol production unit (10)2The inlet is connected.
3. The carbon dioxide conversion system in the process of preparing methanol from coal as claimed in claim 1, wherein CO is supplied to the methanol conversion system2Control valves are arranged on connecting pipelines of the methanol preparation unit (10), the low-temperature methanol washing unit (5) and the hydrogen collecting unit (12).
4. The carbon dioxide conversion system in the process of preparing methanol from coal according to claim 1, wherein a control valve is arranged on a connecting pipeline between the water treatment unit (7) and the electrolytic hydrogen production unit (9) and the coal gasification unit (2).
5. The carbon dioxide conversion system in the process of preparing methanol from coal as claimed in claim 1, wherein the methanol rectification unit (11) and the methanol-from-syngas unit (6) and the CO are arranged in parallel2Control valves are arranged on connecting pipelines between the methanol preparation units (10).
6. The carbon dioxide conversion system in the process of preparing methanol from coal as claimed in claim 1, wherein control valves are arranged on connecting pipelines of the coal gasification unit (2), the oxygen collection unit (13) and the air separation unit (14).
CN202021034431.7U 2020-06-08 2020-06-08 Carbon dioxide conversion system in methanol preparation process from coal Active CN212222831U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021034431.7U CN212222831U (en) 2020-06-08 2020-06-08 Carbon dioxide conversion system in methanol preparation process from coal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021034431.7U CN212222831U (en) 2020-06-08 2020-06-08 Carbon dioxide conversion system in methanol preparation process from coal

Publications (1)

Publication Number Publication Date
CN212222831U true CN212222831U (en) 2020-12-25

Family

ID=73931629

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021034431.7U Active CN212222831U (en) 2020-06-08 2020-06-08 Carbon dioxide conversion system in methanol preparation process from coal

Country Status (1)

Country Link
CN (1) CN212222831U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113045382A (en) * 2021-03-22 2021-06-29 中国华能集团清洁能源技术研究院有限公司 System for simplifying coal-to-methanol process by adjusting carbon-hydrogen ratio with hydrogen and working method thereof
CN113200818A (en) * 2021-05-06 2021-08-03 中国华能集团清洁能源技术研究院有限公司 Carbon dioxide conversion system in methanol preparation process from coal and working method thereof
CN113563159A (en) * 2021-08-27 2021-10-29 陕西润中清洁能源有限公司 Process and device for preparing methanol from water gas
CN115959970A (en) * 2021-10-11 2023-04-14 新奥科技发展有限公司 Zero-carbon-emission coal-to-methanol system and method for preparing methanol from coal

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113045382A (en) * 2021-03-22 2021-06-29 中国华能集团清洁能源技术研究院有限公司 System for simplifying coal-to-methanol process by adjusting carbon-hydrogen ratio with hydrogen and working method thereof
CN113045382B (en) * 2021-03-22 2022-06-14 中国华能集团清洁能源技术研究院有限公司 System for simplifying coal-to-methanol process by adjusting carbon-hydrogen ratio with hydrogen and working method thereof
WO2022199263A1 (en) * 2021-03-22 2022-09-29 中国华能集团清洁能源技术研究院有限公司 System for simplifying coal-to-methanol by adjusting carbon-hydrogen ratio with hydrogen and working method of system
CN113200818A (en) * 2021-05-06 2021-08-03 中国华能集团清洁能源技术研究院有限公司 Carbon dioxide conversion system in methanol preparation process from coal and working method thereof
CN113563159A (en) * 2021-08-27 2021-10-29 陕西润中清洁能源有限公司 Process and device for preparing methanol from water gas
CN115959970A (en) * 2021-10-11 2023-04-14 新奥科技发展有限公司 Zero-carbon-emission coal-to-methanol system and method for preparing methanol from coal

Similar Documents

Publication Publication Date Title
CN212222831U (en) Carbon dioxide conversion system in methanol preparation process from coal
CN111559956A (en) Carbon dioxide conversion system in methanol preparation process from coal and working method thereof
WO2021218048A1 (en) Energy storage system and method for co-producing hydrogen and urea
CN113045382B (en) System for simplifying coal-to-methanol process by adjusting carbon-hydrogen ratio with hydrogen and working method thereof
CN111547678B (en) Method and system for preparing methanol by full-component thermal catalysis of marsh gas
CN108046987A (en) A kind of coal of low-carbon high-efficiency and oven gas alliance preparing ethylene glycol system and method
CN103804138B (en) Technology for producing methanol through coke oven gas
CN208182929U (en) A kind of system by gasification and electrolysis coupling symphysis production of synthetic gas
CN107446635B (en) Novel coke oven gas utilization method
CN107557075B (en) Biomass indirect liquefaction synthetic oil technique and its system
CN209854029U (en) Device for preparing methanol from synthesis gas without conversion system
CN210261659U (en) Biomass hydrogen production equipment
CN100400420C (en) Process for producing synthetic ammonia or methanol by acetylene furnace tail gas
CN104531246A (en) System for producing natural gas by electrolytic hydrogen production and gas synthesis from coal
CN113753896B (en) Preparation method of synthesis gas for realizing zero carbon emission by using electric energy combined inverse transformation reaction
CN210261105U (en) Device for preparing various synthesis gases by using yellow phosphorus tail gas
CN215947205U (en) Production device for resource utilization of coal gasification waste residues
CN217266051U (en) System for dynamically adjusting coupling of electrolytic hydrogen production and coal-based methanol production
CN108299158B (en) Coal-to-methanol system and method integrating chemical chain and carbon dioxide utilization technology
CN105779020A (en) Coarse coal gas purification and waste heat recovery system and method
CN215403948U (en) Device for preparing methanol from water gas
CN220432726U (en) Biomass full-component utilization system with carbon emission
CN214654691U (en) Biomass cleaning and utilizing system
CN213357475U (en) Hydrocarbon synthesis gas utilization system
CN215667848U (en) Device and system for preparing fuel and chemicals through coal gasification

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant