CN103867894B - One utilizes cold energy of liquefied natural gas to generate electricity and CO 2the method and apparatus of trapping - Google Patents
One utilizes cold energy of liquefied natural gas to generate electricity and CO 2the method and apparatus of trapping Download PDFInfo
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- CN103867894B CN103867894B CN201410125639.2A CN201410125639A CN103867894B CN 103867894 B CN103867894 B CN 103867894B CN 201410125639 A CN201410125639 A CN 201410125639A CN 103867894 B CN103867894 B CN 103867894B
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Abstract
The invention belongs to oil-gas storage and Transportation Engineering technical field, be specifically related to one and utilize cold energy of liquefied natural gas to generate electricity and trapping CO
2method and apparatus.Along with the fast development of China's economy, the LNG Liquefied natural gas (LNG) as green energy resource obtains more attention and utilization.A large amount of cold energy results from LNG gasification, not only causes the waste of the energy, also will cause cold pollution.Cold energy meanwhile entrained by LNG has great economic value, and LNG cold energy is used for generating and CO
2trapping achieves the comprehensive utilization of the energy and the protection of environment.
Description
Technical field
The invention belongs to oil-gas storage and Transportation Engineering technical field, be specifically related to utilize cold energy of liquefied natural gas to generate electricity and CO
2the method and apparatus of trapping.
Background technique
Along with the fast development of China's economy and the continuous increase of environmental protection pressure, rock gas increases day by day as the proportion of the clean and effective energy.A large amount of cold energy results from LNG gasification, not only causes the waste of the energy, also will cause cold pollution, and the cold energy meanwhile entrained by LNG has great economic value.And LNG cold energy is used for direct expansion generating, be used for cooling steam power cycle flow process and the flow process for reducing gas turbine inhalation temperature, to improve the generated energy of each equipment, achieve recycling and the environmental protection of LNG cold energy
Summary of the invention
The object of the invention is one utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method and apparatus of trapping.By utilizing turbo-expander and heat exchanger that LNG is converted into normal temperature and pressure rock gas, and the cold energy that LNG gasification produces is used for generating and trapping CO
2, achieve recycling and the CO of LNG cold energy
2zero-emission, decrease the pollution to environment in power generation process.
Technical solution of the present invention is as follows, it is characterized in that: LNG is injected into turbo-expander by LNG cryopump, drives electrical power generators, then enters urban pipe network through plate type heat exchanger, convection heat-exchanger; The water vapour produced by boiler enters Steam Turbine Driven electrical power generators through superheater, injects boiler from steam turbine water vapour out through convection recuperator by water pump; Ethylene glycol solution enters convection recuperator after injecting convection heat-exchanger and throttle valve by eg pump; The waste gas produced by boiler enters plate type heat exchanger after exsiccator, finally with liquid CO
2form be stored in liquid CO
2storage tank; Ethylene glycol solution injects plate type heat exchanger by eg pump and (enters convection recuperator with after throttle valve; The air injected by air inlet enters the steam of firing chamber generation through driven compressor electrical power generators through plate type heat exchanger, compressor; The waste gas produced by firing chamber through exsiccator, plate type heat exchanger, finally with liquid CO
2form be stored in liquid CO
2storage tank.
Above-mentionedly utilize the cold energy produced in LNG gasification rationally, efficiently, and use it for the CO produced in multiple power-generating approaches and process power generation process
2, not only reduce the pollution problem of power generation process to environment, also effectively reclaim LNG cold energy, improve the comprehensive utilization ratio of the energy, there is considerable economic benefit and energy-saving and emission-reduction effect.
The advantage of invention
Advantage of the present invention: (1) comprehensive utilization LNG cold energy uses it for multiple power-generating approaches, achieves the recycling of LNG cold energy and the raising of generated energy; (2) LNG cold energy is used for trapping CO
2decrease the waste gas that produces in power generation process to the pollution of environment; (3) flow process is simple, equipment is few, flexible adjustment, reliable operation, easily start, operating cost is low.
Accompanying drawing explanation
Fig. 1 is that one of the present invention utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method and apparatus schematic flow sheet of trapping;
Embodiment
Below in conjunction with drawings and the embodiments, patent of the present invention is described in further detail:
Patent of the present invention is specifically related to one and utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method and apparatus of trapping, LNG is injected into turbo-expander by LNG cryopump, drives electrical power generators, then enters urban pipe network through plate type heat exchanger, convection heat-exchanger; The water vapour produced by boiler enters Steam Turbine Driven electrical power generators through superheater, injects boiler from steam turbine water vapour out through convection recuperator by water pump; Ethylene glycol solution enters convection recuperator after injecting convection heat-exchanger and throttle valve by eg pump; The waste gas produced by boiler enters plate type heat exchanger after exsiccator, finally with liquid CO
2form be stored in liquid CO
2storage tank; Ethylene glycol solution injects plate type heat exchanger by eg pump and (enters convection recuperator with after throttle valve; The air injected by air inlet enters the steam of firing chamber generation through driven compressor electrical power generators through plate type heat exchanger, compressor; The waste gas produced by firing chamber through exsiccator, plate type heat exchanger, finally with liquid CO
2form be stored in liquid CO
2storage tank.Detailed protocol is as follows, the device adopted comprises: LNG cryopump (1), turbo-expander (2), first generator (3), first plate type heat exchanger (4), first convection heat-exchanger (5), first throttle valve (6), the first eg pump (7), second convection heat-exchanger (8), water pump (9), boiler (10), superheater (11), steam turbine (12), second generator (13), the first exsiccator (14), the first liquid CO
2storage tank (15), second throttle (16), second eg pump (17), second plate type heat exchanger (18), the first compressor (19), firing chamber (20), second compressor (21), 3rd generator (22), the second exsiccator (23), the second liquid CO
2storage tank (24); It is characterized in that: LNG is injected into turbo-expander (2) by LNG cryopump (1) and drives the first generator (3) to generate electricity, then enters urban pipe network through the first plate type heat exchanger (4), the first convection heat-exchanger (5); The water vapour produced by boiler (10) enters steam turbine (12) through superheater (11) and drives the second generator (13) to generate electricity, and injects boiler from steam turbine (12) water vapour out through the second convection recuperator (8) by water pump; Ethylene glycol solution enters the second convection recuperator (8) after injecting the first convection heat-exchanger (5) and first throttle valve (6) by the first eg pump (7); The waste gas produced by boiler (10) enters the first plate type heat exchanger (4) after the first exsiccator (14), finally with liquid CO
2form be stored in the first liquid CO
2storage tank (15); Ethylene glycol solution enters the second convection recuperator (8) after injecting the second plate type heat exchanger (18) and second throttle (16) by the second eg pump (17); The air injected by air inlet enters through the second plate type heat exchanger (18), the first compressor (19) steam that firing chamber (20) produces and drives the second generator (22) to generate electricity through the second compressor (21); The waste gas produced by firing chamber (20) through the second exsiccator (23), the first plate type heat exchanger (4), finally with liquid CO
2form be stored in the second liquid CO
2storage tank (24).
Described one utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method and apparatus of trapping, it is characterized in that, LNG cold energy is used for multiple power-generating approaches by the present invention, comprise LNG cold energy for direct expansion flow process, for cooling steam power cycle flow process and the flow process for reducing gas turbine inhalation temperature, achieve the recycling of LNG cold energy and improve generated energy.
Described one utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method and apparatus of trapping, is characterized in that, by turbo-expander (2) comparatively low-temp low-pressure natural gas temperature out lower than-78.3 DEG C.
Described one utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method and apparatus of trapping, it is characterized in that, the waste gas produced by boiler (10) enters the first plate type heat exchanger (4) after the first exsiccator (14), the waste gas produced by firing chamber (20) through the second exsiccator (23), the first plate type heat exchanger (4), finally with liquid CO
2form be stored in the first liquid CO
2storage tank (15), the second liquid CO
2storage tank achieves CO in (24)
2zero-emission, decrease the waste gas that produces in power generation process to the pollution of environment.
Described one utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method and apparatus of trapping, it is characterized in that, be refrigerant with ethylene glycol solution, ensure that chilling temperature more than 0 DEG C to prevent water devaporation.
Claims (5)
1. one kind utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method of trapping, the device adopted in method comprises: LNG cryopump (1), turbo-expander (2), first generator (3), first plate type heat exchanger (4), first convection heat-exchanger (5), first throttle valve (6), the first eg pump (7), second convection heat-exchanger (8), water pump (9), boiler (10), superheater (11), steam turbine (12), second generator (13), the first exsiccator (14), the first liquid CO
2storage tank (15), second throttle (16), second eg pump (17), second plate type heat exchanger (18), the first compressor (19), firing chamber (20), second compressor (21), 3rd generator (22), the second exsiccator (23), the second liquid CO
2storage tank (24); It is characterized in that: LNG is injected into turbo-expander (2) by LNG cryopump (1) and drives the first generator (3) to generate electricity, then enters urban pipe network through the first plate type heat exchanger (4), the first convection heat-exchanger (5); The water vapour produced by boiler (10) enters steam turbine (12) through superheater (11) and drives the second generator (13) to generate electricity, and injects boiler from steam turbine (12) water vapour out through the second convection recuperator (8) by water pump; Ethylene glycol solution enters the second convection recuperator (8) after injecting the first convection heat-exchanger (5) and first throttle valve (6) by the first eg pump (7); The waste gas produced by boiler (10) enters the first plate type heat exchanger (4) after the first exsiccator (14), finally with liquid CO
2form be stored in the first liquid CO
2storage tank (15); Ethylene glycol solution enters the second convection recuperator (8) after injecting the second plate type heat exchanger (18) and second throttle (16) by the second eg pump (17); The air injected by air inlet enters through the second plate type heat exchanger (18), the first compressor (19) steam that firing chamber (20) produces and drives the second generator (22) to generate electricity through the second compressor (21); The waste gas produced by firing chamber (20) through the second exsiccator (23), the first plate type heat exchanger (4), finally with liquid CO
2form be stored in the second liquid CO
2storage tank (24).
2. one as claimed in claim 1 utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method of trapping, it is characterized in that, LNG cold energy is used for multiple power-generating approaches by the present invention, comprises LNG cold energy for direct expansion flow process, for cooling steam power cycle flow process and the flow process for reducing gas turbine inhalation temperature, achieve the recycling of LNG cold energy and improve generated energy.
3. one as claimed in claim 1 utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method of trapping, is characterized in that, by turbo-expander (2) comparatively low-temp low-pressure natural gas temperature out lower than-78.3 DEG C.
4. one as claimed in claim 1 utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method of trapping, it is characterized in that, the waste gas produced by boiler (10) enters the first plate type heat exchanger (4) after the first exsiccator (14), the waste gas produced by firing chamber (20) through the second exsiccator (23), the first plate type heat exchanger (4), finally with liquid CO
2form be stored in the first liquid CO
2storage tank (15), the second liquid CO
2storage tank achieves CO in (24)
2zero-emission, decrease the waste gas that produces in power generation process to the pollution of environment.
5. one as claimed in claim 1 utilizes cold energy of liquefied natural gas to generate electricity and CO
2the method of trapping, it is characterized in that, be refrigerant with ethylene glycol solution, ensure that chilling temperature more than 0 DEG C to prevent water devaporation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410125639.2A CN103867894B (en) | 2014-03-29 | 2014-03-29 | One utilizes cold energy of liquefied natural gas to generate electricity and CO 2the method and apparatus of trapping |
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|---|---|---|---|
| CN201410125639.2A CN103867894B (en) | 2014-03-29 | 2014-03-29 | One utilizes cold energy of liquefied natural gas to generate electricity and CO 2the method and apparatus of trapping |
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| CN103867894A CN103867894A (en) | 2014-06-18 |
| CN103867894B true CN103867894B (en) | 2016-02-10 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236252B (en) * | 2014-08-27 | 2016-06-22 | 华南理工大学 | LNG cold energy is utilized to prepare method and the device of liquid CO 2 and dry ice |
| CN104818066A (en) * | 2015-02-22 | 2015-08-05 | 曹永珍 | Process system capable of realizing zero emission of waste incineration tail gas by utilizing liquefied natural gas cold energy |
| CN104803432A (en) * | 2015-04-20 | 2015-07-29 | 辽宁石油化工大学 | Method and device of multilevel utilization of cold energy of LNG |
| CN104989473B (en) * | 2015-05-27 | 2016-10-19 | 上海交通大学 | A kind of electricity generation system and electricity-generating method based on this system |
| CN104948246B (en) * | 2015-06-18 | 2017-02-01 | 东北大学 | Method for capturing carbon dioxide in mineral smelting waste gas by making use of liquefied natural gas (LNG) cold energy |
| CN105115245B (en) * | 2015-08-11 | 2017-07-11 | 中海油能源发展股份有限公司北京冷能利用研究所 | The system and device and its method of liquefied carbon dioxide are trapped using cold energy of liquefied natural gas |
| CN106369857B (en) * | 2015-12-30 | 2020-04-07 | 李华玉 | First-class thermally-driven compression heat pump |
| CN105712348A (en) * | 2016-01-19 | 2016-06-29 | 辽宁石油化工大学 | Carbon dioxide recovery method and carbon dioxide recovery device for achieving zero emission of liquified natural gas |
| CN105649698A (en) * | 2016-03-17 | 2016-06-08 | 中国海洋石油总公司 | Process and device for carrying out power generation by virtue of cascade cold energy of liquefied natural gas |
| CN105736082A (en) * | 2016-04-14 | 2016-07-06 | 新地能源工程技术有限公司 | Natural gas pressure energy power generation technology and device with heat pump |
| JP6916061B2 (en) * | 2017-08-10 | 2021-08-11 | 株式会社Ｉｈｉプラント | Heat exchange system |
| CN110469768B (en) * | 2018-05-12 | 2021-02-05 | 中国石油化工股份有限公司 | LNG cold energy utilization and hydrate exploitation CO2Trapping device and trapping method thereof |
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| JP3999146B2 (en) * | 2003-03-04 | 2007-10-31 | 三井造船株式会社 | Natural gas, cold and water transportation system by gas hydrate |
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| CN1447016A (en) * | 2002-03-22 | 2003-10-08 | 中国科学院工程热物理研究所 | Gas turbine generating system and flow by cooling liquefied natural gas to separate carbon dioxide |
| CN103459784A (en) * | 2011-02-01 | 2013-12-18 | 阿尔斯通技术有限公司 | Combined cycle power plant with CO2 capture plant |
| CN203743849U (en) * | 2014-03-29 | 2014-07-30 | 辽宁石油化工大学 | Device for generating and collecting carbon dioxide (CO2) by utilizing liquefied natural gas cold energy |
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