CN103867894A - Method and device for generating power and capturing CO2 through cold energy of liquefied natural gas - Google Patents
Method and device for generating power and capturing CO2 through cold energy of liquefied natural gas Download PDFInfo
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- CN103867894A CN103867894A CN201410125639.2A CN201410125639A CN103867894A CN 103867894 A CN103867894 A CN 103867894A CN 201410125639 A CN201410125639 A CN 201410125639A CN 103867894 A CN103867894 A CN 103867894A
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Abstract
The invention belongs to the technical field of oil-gas storage and transportation engineering, and particularly relates to a method and device for generating power and capturing CO2 through cold energy of liquefied natural gas. With the rapid development of economy in China, LNG serving as green energy gets more attention and is better utilized. A large amount of cold energy is produced in the LNG gasification process, energy waste is caused, and cold pollution will be caused as well. At the same time, cold energy carried by LNG has great economic value, and when cold energy of LNG is used for power generation and CO2 capturing, energy comprehensive utilization and environment protection are achieved.
Description
Technical field
The invention belongs to oil gas and store and Transportation Engineering technical field, be specifically related to utilize cold energy of liquefied natural gas generating 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 meanwhile the entrained cold energy of LNG has great economic value.And by LNG cold energy for direct expansion generating, for cooling steam power cycle flow process with for reducing the flow process of gas turbine inhalation temperature, to improve the generated energy of each equipment, realized recycling and the environmental protection of LNG cold energy
Summary of the invention
The object of the invention is one and utilize cold energy of liquefied natural gas generating 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 is produced is for generating and trapping CO
2, realized recycling and the CO of LNG cold energy
2zero-emission, reduced 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 generator generating, then enters urban pipe network through plate type heat exchanger, convection heat-exchanger; The water vapour being produced by boiler enters Steam Turbine Driven generator through superheater and generates electricity, and 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 that produced by boiler through exsiccator laggard enter plate type heat exchanger, finally with liquid CO
2form be stored in liquid CO
2storage tank; Ethylene glycol solution by eg pump inject plate type heat exchanger (with after throttle valve, enter convection recuperator; The steam that the air being injected by air inlet enters firing chamber generation through plate type heat exchanger, compressor generates electricity through driven compressor generator; The waste gas being produced by firing chamber is through exsiccator, plate type heat exchanger, finally with liquid CO
2form be stored in liquid CO
2storage tank.
Above-mentionedly utilize rationally, efficiently the cold energy producing in LNG gasification, and use it for multiple generation mode and process the CO producing in 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 is used it for multiple generation mode, has realized the recycling of LNG cold energy and the raising of generated energy; (2) LNG cold energy is used for trapping CO
2reduced that pollution (3) flow process of the waste gas producing in power generation process to environment is simple, equipment is few, flexible adjustment, reliable operation, easily starting, operating cost be low.
Brief description of the drawings
Fig. 1 is that one of the present invention is utilized cold energy of liquefied natural gas generating 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 generating and CO
2the method and apparatus of trapping, LNG is injected into turbo-expander by LNG cryopump, drives generator generating, then enters urban pipe network through plate type heat exchanger, convection heat-exchanger; The water vapour being produced by boiler enters Steam Turbine Driven generator through superheater and generates electricity, and 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 that produced by boiler through exsiccator laggard enter plate type heat exchanger, finally with liquid CO
2form be stored in liquid CO
2storage tank; Ethylene glycol solution by eg pump inject plate type heat exchanger (with after throttle valve, enter convection recuperator; The steam that the air being injected by air inlet enters firing chamber generation through plate type heat exchanger, compressor generates electricity through driven compressor generator; The waste gas being produced by firing chamber is through exsiccator, plate type heat exchanger, finally with liquid CO
2form be stored in liquid CO
2storage tank.Detailed protocol is as follows, and the device adopting comprises: LNG cryopump (1), turbo-expander (2), generator (3), (13), (22), plate type heat exchanger (4), (18), convection heat-exchanger (5), (8), throttle valve (6), (16), eg pump (7), (17), water pump (9), boiler (10), superheater (11), steam turbine (12), exsiccator (14), (23), liquid CO
2storage tank (15), (24), compressor (19), (21), firing chamber (20); It is characterized in that: LNG by LNG cryopump (1) be injected into turbo-expander (2) drive generator (3) generating, then pass through plate type heat exchanger (4), convection heat-exchanger (5) enters urban pipe network; The water vapour being produced by boiler (10) enters steam turbine (12) through superheater (11) and drives generator (13) generating, injects boiler from steam turbine (12) water vapour out through convection recuperator (8) by water pump; Ethylene glycol solution enters convection recuperator (8) after injecting convection heat-exchanger (5) and throttle valve (6) by eg pump (7); By boiler (10) produce waste gas through exsiccator (14) laggard enter plate type heat exchanger (4), finally with liquid CO
2form be stored in liquid CO
2storage tank (15); Ethylene glycol solution enters convection recuperator (8) after injecting plate type heat exchanger (18) and throttle valve (16) by eg pump (17); The air being injected by air inlet enters through plate type heat exchanger (18), compressor (19) steam process compressor (21) driving generator (22) generating that firing chamber (20) produces; The waste gas being produced by firing chamber (20) is through exsiccator (23), plate type heat exchanger (4), finally with liquid CO
2form be stored in liquid CO
2storage tank (24).
Described one is utilized cold energy of liquefied natural gas generating and CO
2the method and apparatus of trapping, it is characterized in that, LNG cold energy is used for multiple generation mode by the present invention, comprise that LNG cold energy, for direct expansion flow process, for cooling steam power cycle flow process with for reducing the flow process of gas turbine inhalation temperature, realized the recycling of LNG cold energy and improved generated energy.
Described one is utilized cold energy of liquefied natural gas generating and CO
2trapping method and apparatus, it is characterized in that, by turbo-expander (2) lower temperature low pressure natural gas temperature out lower than-78.3 DEG C.
Described one is utilized cold energy of liquefied natural gas generating and CO
2the method and apparatus of trapping, is characterized in that, the waste gas being produced by boiler (10) through exsiccator (14) laggard enter plate type heat exchanger (4), the waste gas being produced by firing chamber (20) is through exsiccator (23), plate type heat exchanger (4), finally with liquid CO
2form be stored in liquid CO
2in storage tank (15), (24), realize CO
2zero-emission, reduced the pollution of the waste gas producing in power generation process to environment.
Described a kind of method and apparatus that utilizes cold energy of liquefied natural gas generating and CO2 trapping, is characterized in that, taking ethylene glycol solution as refrigerant, ensured chilling temperature more than 0 DEG C to prevent water devaporation.
Claims (5)
1. one kind is utilized cold energy of liquefied natural gas generating and CO
2the method and apparatus of trapping, the device adopting in method comprises: LNG cryopump (1), turbo-expander (2), generator (3), (13), (22), plate type heat exchanger (4), (18), convection heat-exchanger (5), (8), throttle valve (6), (16), eg pump (7), (17), water pump (9), boiler (10), superheater (11), steam turbine (12), exsiccator (14), (23), liquid CO
2storage tank (15), (24), compressor (19), (21), firing chamber (20); It is characterized in that: LNG by LNG cryopump (1) be injected into turbo-expander (2) drive generator (3) generating, then pass through plate type heat exchanger (4), convection heat-exchanger (5) enters urban pipe network; The water vapour being produced by boiler (10) enters steam turbine (12) through superheater (11) and drives generator (13) generating, injects boiler from steam turbine (12) water vapour out through convection recuperator (8) by water pump; Ethylene glycol solution enters convection recuperator (8) after injecting convection heat-exchanger (5) and throttle valve (6) by eg pump (7); By boiler (10) produce waste gas through exsiccator (14) laggard enter plate type heat exchanger (4), finally with liquid CO
2form be stored in liquid CO
2storage tank (15); Ethylene glycol solution enters convection recuperator (8) after injecting plate type heat exchanger (18) and throttle valve (16) by eg pump (17); The air being injected by air inlet enters through plate type heat exchanger (18), compressor (19) steam process compressor (21) driving generator (22) generating that firing chamber (20) produces; The waste gas being produced by firing chamber (20) is through exsiccator (23), plate type heat exchanger (4), finally with liquid CO
2form be stored in liquid CO
2storage tank (24).
2. one as claimed in claim 1 is utilized cold energy of liquefied natural gas generating and CO
2the method and apparatus of trapping, it is characterized in that, LNG cold energy is used for multiple generation mode by the present invention, comprise that LNG cold energy, for direct expansion flow process, for cooling steam power cycle flow process with for reducing the flow process of gas turbine inhalation temperature, realized the recycling of LNG cold energy and improved generated energy.
3. one as claimed in claim 1 is utilized cold energy of liquefied natural gas generating and CO
2trapping method and apparatus, it is characterized in that, by turbo-expander (2) lower temperature low pressure natural gas temperature out lower than-78.3 DEG C.
4. one as claimed in claim 1 is utilized cold energy of liquefied natural gas generating and CO
2the method and apparatus of trapping, is characterized in that, the waste gas being produced by boiler (10) through exsiccator (14) laggard enter plate type heat exchanger (4), the waste gas being produced by firing chamber (20) is through exsiccator (23), plate type heat exchanger (4), finally with liquid CO
2form be stored in liquid CO
2in storage tank (15), (24), realize CO
2zero-emission, reduced the pollution of the waste gas producing in power generation process to environment.
5. one as claimed in claim 1 is utilized cold energy of liquefied natural gas generating and CO
2trapping method and apparatus, it is characterized in that, taking ethylene glycol solution as refrigerant, ensured chilling temperature more than 0 DEG C to prevent water devaporation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN103867894A (en) | 2014-06-18 |
| CN103867894B CN103867894B (en) | 2016-02-10 |
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| CN201410125639.2A Expired - Fee Related 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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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236252A (en) * | 2014-08-27 | 2014-12-24 | 华南理工大学 | Method and device for preparing liquid CO2 (carbon diode) by cold energy of LNG (liquefied natural gas) |
| 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 |
| 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 |
| CN104948246A (en) * | 2015-06-18 | 2015-09-30 | 东北大学 | Method for capturing carbon dioxide in mineral smelting waste gas by making use of liquefied natural gas (LNG) cold energy |
| CN104989473A (en) * | 2015-05-27 | 2015-10-21 | 上海交通大学 | Power generation system and generating method based on same |
| CN105115245A (en) * | 2015-08-11 | 2015-12-02 | 中海油能源发展股份有限公司北京冷能利用研究所 | System device for trapping liquefied carbon dioxide by using cold energy of liquefied natural gas and method of device |
| 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 |
| 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 |
| 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 |
| CN106369857A (en) * | 2015-12-30 | 2017-02-01 | 李华玉 | First-kind thermally driven compression heat pump |
| WO2019031073A1 (en) * | 2017-08-10 | 2019-02-14 | 株式会社Ihi | Heat exchange system |
| CN110469768A (en) * | 2018-05-12 | 2019-11-19 | 中国石油化工股份有限公司 | A kind of CO of LNG cold energy use and hydrate exploitation2Capturing device and its capture method |
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| 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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| JP2004263832A (en) * | 2003-03-04 | 2004-09-24 | Mitsui Eng & Shipbuild Co Ltd | Transportation system for natural gas, cold, and water by gas hydrate |
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Cited By (17)
| 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 |
| CN104236252A (en) * | 2014-08-27 | 2014-12-24 | 华南理工大学 | Method and device for preparing liquid CO2 (carbon diode) by cold energy of LNG (liquefied natural gas) |
| 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 |
| CN104989473A (en) * | 2015-05-27 | 2015-10-21 | 上海交通大学 | Power generation system and generating method based on same |
| CN104948246A (en) * | 2015-06-18 | 2015-09-30 | 东北大学 | Method for capturing carbon dioxide in mineral smelting waste gas by making use of liquefied natural gas (LNG) cold energy |
| 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 |
| CN105115245A (en) * | 2015-08-11 | 2015-12-02 | 中海油能源发展股份有限公司北京冷能利用研究所 | System device for trapping liquefied carbon dioxide by using cold energy of liquefied natural gas and method of device |
| CN106369857A (en) * | 2015-12-30 | 2017-02-01 | 李华玉 | First-kind thermally driven compression heat pump |
| 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 |
| WO2019031073A1 (en) * | 2017-08-10 | 2019-02-14 | 株式会社Ihi | Heat exchange system |
| JP2019035420A (en) * | 2017-08-10 | 2019-03-07 | 株式会社Ihi | Heat exchange system |
| CN110469768A (en) * | 2018-05-12 | 2019-11-19 | 中国石油化工股份有限公司 | A kind of CO of LNG cold energy use and hydrate exploitation2Capturing device and its capture method |
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