CN105134317A - Environment-friendly power generation system and power grid operation method thereof - Google Patents
Environment-friendly power generation system and power grid operation method thereof Download PDFInfo
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- CN105134317A CN105134317A CN201510517566.6A CN201510517566A CN105134317A CN 105134317 A CN105134317 A CN 105134317A CN 201510517566 A CN201510517566 A CN 201510517566A CN 105134317 A CN105134317 A CN 105134317A
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- 238000010248 power generation Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 221
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 110
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 107
- 238000000605 extraction Methods 0.000 claims description 12
- 229960004424 carbon dioxide Drugs 0.000 description 85
- 230000005611 electricity Effects 0.000 description 5
- 239000005431 greenhouse gas Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 235000011089 carbon dioxide Nutrition 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The invention discloses an environment-friendly power generation system. The environment-friendly power generation system comprises turbines, steam ejectors and a carbon dioxide acquisition device. The turbines comprise the high-pressure turbine, the intermediate-pressure turbine and the low-pressure turbine. The steam ejectors can receive steam of an outlet of the low-pressure turbine and increase the pressure of the steam. The steam pressurized through the steam ejectors is introduced into the carbon dioxide acquisition device through a pipeline. The steam ejectors comprise the first steam ejector and the second steam ejector. The parallel and series connection relation between the first steam ejector and the second steam ejector can be changed according to power grid loads of the power generation system. In addition, the steam passing through the steam ejectors can meet the requirement for operation pressure of the carbon dioxide acquisition device by changing the flowing direction of the steam.
Description
Technical field
The present invention relates to a kind of power generation system, especially relate to a kind of environment-friendly power generation system and the operation of power networks method thereof with carbon dioxide capture device.
Background technique
In recent years, the generation of greenhouse gases obviously causes global warming, and the generation of greenhouse gases increases further by more increase from global warming.Because carbon dioxide is considered to main greenhouse gases, therefore, be that the greenhouse gases of representative discharge the Global climate change caused in a large number with carbon dioxide, be face at present the most serious of the mankind and need most one of urgent problem solved, carbon is caught and is stored and is considered to reduce greenhouse gases and discharges into the atmosphere and control a kind of possible Main Means of global warming.
Carbon dioxide mainly comes from the burning of fossil fuel, and the flue gas of conventional power plants comprises the carbon dioxide of from about 4% to about 14% usually.In China, fossil fuel particularly Coal Energy Source is in consequence for a long time in power industry, and the CO2 emissions of power industry particularly a large amount of coal-burning power plant accounts for 40 ~ 50% of national CO2 emission total amount.Therefore, Development of Novel environment-friendly power generation system, reduce CO2 emissions, the significance for coal fired power plant and even whole society's carbon emission reduction is self-evident.
Think that the collecting carbonic anhydride technology closest to large-scale industrial application is after-combustion trapping at present.In after-combustion trapping, from flue gas, remove carbon dioxide, residue flue gas is discharged into the atmosphere and carbon dioxide compression is used for transport and stores.In the multiple application such as the carbon dioxide be captured may be used for sealing up for safekeeping, methyl alcohol manufacture and the recovery of three oil.
Chemical absorption carbon dioxide separation method is that one is widely used, adaptable flue gas decarbonization process engineering.It utilizes to absorb removes carbon dioxide from combustion gas, and utilizes steam stripping regeneration solvent subsequently and catch the carbon dioxide comprised in a solvent.But warmly during this method needs to consume supply Analytic Tower, to realize the carbon dioxide resolving in Analytic Tower.For providing this part heat, need the steam extracting specified pressure from steam turbine cycle stream for heating Analytic Tower reboiler.
In prior art, 201110172955.1 patent of invention propose a kind of power generating equipment with carbon dioxide capture and compression, wherein by using the connection of Clutch Control steam turbine and generator, thus make can operating flexibly according to load of permission carbon dioxide capture systems and compressor.201080063370.X patent of invention disclose a kind of electricity generating device with carbon dioxide capture, it is by use two steam jet ejectors, according to the load choice for use of electricity generating device one of them for increasing the vapor tension extracted from electricity generating device vapour-cycling, thus make it meet the demand of the operating pressure of carbon dioxide capture device.
The patent of invention of 201080063370.X makes the vapor tension of extraction meet the demand of the operating pressure of carbon dioxide capture device by steam jet ejector.But it is when the load of electricity generating device is lower, in order to meet the demand of the operating pressure of carbon dioxide capture device, can only by extracting steam from boiler export from the high pressure section of steam turbine is even direct or uses the steam jet ejector that pressurization amplitude is higher.And if cause the steam done work to reduce from the drawn upstream steam of steam turbine, the generating efficiency of system can be reduced, if use the vapor steam blaster that pressurization amplitude is higher, then need to increase cost.
Summary of the invention
The invention provides a kind of environmental protection steam power-generating system with carbon dioxide capture, the above-mentioned deficiency of the invention of 201080063370.X can be improved, when do not need to use more high compressed steam sparger, the vapor tension extracted from steam turbine low pressure stage also can be made to meet the demand of the operating pressure of carbon dioxide capture device.
As one aspect of the present invention, provide a kind of environment-friendly power generation system, comprise turbo machine, vapor steam blaster and carbon dioxide capture device, described turbo machine comprises high pressure turbine, middle-pressure turbine and low-pressure turbine; Described vapor steam blaster can receive low-pressure turbine outlet steam, and increases the pressure of this steam; Steam after described vapor steam blaster pressurization, introduces carbon dioxide capture device by pipeline; Described vapor steam blaster comprises the first steam jet ejector and the second vapor steam blaster, parallel connection between described first vapor steam blaster and the second vapor steam blaster and series relationship can be changed according to the network load of power generation system, and by the change that steam flows to, make the requirement being met carbon dioxide capture plant running pressure by the steam of vapor steam blaster.
Preferably, the outlet line of described low-pressure turbine is divided into two-way, and wherein a-road-through is to condenser, and an other road is divided into three-way connection (pipe) line; In described three tunnels, first via pipeline is communicated with described carbon dioxide capture device by the first valve, second road pipeline is communicated with described carbon dioxide capture device by the second valve, the first vapor steam blaster and the 3rd valve successively, three-way connection (pipe) line successively by the 4th valve and the second vapor steam blaster identical with described carbon dioxide capture device; Pipeline between described first vapor steam blaster with described 3rd valve is communicated by the entrance of the 5th valve with described second vapor steam blaster.
Preferably, the pressurization amplitude of described second vapor steam blaster is greater than the pressurization amplitude of the first vapor steam blaster.
Preferably, described second valve and the 4th valve are Flow valve, when low-pressure turbine outlet steam can not meet the requirement of carbon dioxide capture plant running pressure, and the requirement of carbon dioxide capture plant running pressure is greater than through the vapor tension that the first vapor steam blaster pressurizes, open the first to the three Flow valve, close the 4th valve and the 5th valve, by regulating the flow of the second valve, the vapor tension of inflow carbon dioxide capture device is equaled or slightly larger than carbon dioxide capture device operation needed for pressure.
Preferably, when the vapor tension through the first vapor steam blaster pressurization can not meet the requirement of carbon dioxide capture plant running pressure, and the requirement of carbon dioxide capture plant running pressure is greater than through the vapor tension that the second vapor steam blaster pressurizes, close the first valve and the 5th valve, open the second valve, the 3rd valve and the 4th valve, by regulating the flow of the second valve and the 4th valve, the vapor tension of inflow carbon dioxide capture device is equaled or slightly larger than carbon dioxide capture device operation needed for pressure.
As another aspect of the present invention, provide the operation of power networks method of above-mentioned environment-friendly power generation system, comprise following flow process: when the network load of power generation system be at full capacity or higher than specific first load time, described low-pressure turbine outlet steam meets the requirement of carbon dioxide capture plant running pressure, open the first valve, close the second valve to the 5th valve, the steam flow of extraction is crossed the first pipeline introducing carbon dioxide acquisition equipment, to run described carbon dioxide capture device; When the network load of power generation system lower than specific first load higher than specific second load time, low-pressure turbine outlet steam can not meet the requirement of carbon dioxide capture plant running pressure, and the requirement of carbon dioxide capture plant running pressure is met through the vapor tension that the first vapor steam blaster pressurizes, unlatching second and the 3rd valve, close the first valve, the 4th valve and the 5th valve, the steam flow of extraction is crossed the second pipeline introducing carbon dioxide acquisition equipment, to run described carbon dioxide capture device;
When the network load of power generation system lower than specific second load higher than specific 3rd load time, vapor tension through the first vapor steam blaster pressurization can not meet the requirement of carbon dioxide capture plant running pressure, and the requirement of carbon dioxide capture plant running pressure is met through the vapor tension that the second vapor steam blaster pressurizes, open the 4th valve, close the first valve, the second valve, the 3rd valve and the 5th valve, the steam flow of extraction is crossed the 3rd pipeline introducing carbon dioxide acquisition equipment, to run described carbon dioxide capture device; When the network load of power generation system is lower than specific 3rd load, vapor tension through the second vapor steam blaster pressurization can not meet the requirement of carbon dioxide capture plant running pressure, open the second valve and the 5th valve, close the first valve, the 3rd valve and the 4th valve, after the steam stream of extraction is carried out secondary booster by the first vapor steam blaster and the second vapor steam blaster successively, introducing carbon dioxide acquisition equipment, to run described carbon dioxide capture device.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
See the embodiment of the environment-friendly power generation system of the present invention shown in Fig. 1, it comprises steam generator 6, steam turbine plant, generator 5, vapor steam blaster, carbon dioxide capture device 10 and condenser 7.Steam generator 6 heats the water entering its inside for passing through, and produces the high compressed steam for generating electricity.Steam turbine plant comprises high pressure turbine 1, middle-pressure turbine 2 and low-pressure turbine 3, and it is arranged on common shaft 4.The steam that steam generator 6 generates, by after high pressure turbine 1, after the heating of reheating pipeline, successively by middle-pressure turbine, low-pressure turbine 3, thus drives the generator 5 that is coupled with it and produces electric energy.
The vapor exit line of low-pressure turbine 3 is divided into two-way, and wherein a-road-through is to condenser 7, in condenser 7, be condensed into condensed water, after heating and degassing apparatus, is again imported steam generator 6, circulate by by wire 8; Lead up to vapor steam blaster or directly arrive carbon dioxide capture device catching for carbon dioxide by pipeline in addition.
Vapor steam blaster comprises the first steam jet ejector 26 and the second vapor steam blaster 32, and it can pressurize by steam wherein, and wherein the pressurization amplitude of the second vapor steam blaster 32 is greater than the pressurization amplitude of the first vapor steam blaster 26.
An other road of low-pressure turbine vapor exit line is divided into three-way connection (pipe) line, and wherein first via pipeline 20 is communicated with carbon dioxide capture device 10 by the first valve 21; Second road pipeline 24 communicates 10 by the second valve 25, first vapor steam blaster 26 and the 3rd valve 28 with carbon dioxide capture device successively; Three-way connection (pipe) line 30 is successively by the 4th valve 31 and the second vapor steam blaster 32 identical with carbon dioxide capture device 10; Pipeline 27 between first vapor steam blaster 26 with the 3rd valve 28 is communicated by the entrance of the 5th valve 29 with the second vapor steam blaster 32.
Carbon dioxide capture device 10 comprises such as based on the adsorber of freezing ammonia or amine technological operation and the one or more carbon-dioxide gas compressors for compressing the carbon dioxide extracted from exhaust.The carbon dioxide of catching and compress is transported to storage or transportation facility by means of pipeline 11.Not carbonated gas is released to air or leads to be separated further or to process via pipeline 12.The condensation product water of carbon dioxide capture process is directed to steam generator 6 by pipeline 13.
The operation of power networks method of the power generation system of the embodiment of the present invention, comprises following flow process.When the network load of power generation system be at full capacity or higher than specific first load time, low-pressure turbine 3 exports the requirement that steam meets carbon dioxide capture device 10 operating pressure, open the first valve 21, close the second valve 25 to the 5th valve 29, the steam flow of extraction is crossed the first pipeline 20 introducing carbon dioxide acquisition equipment 10, to run carbon dioxide capture device 10.
When the network load of power generation system lower than specific first load higher than specific second load time, low-pressure turbine 3 exports the requirement that steam can not meet carbon dioxide capture device 10 operating pressure, and the requirement of carbon dioxide capture device 10 operating pressure is met through the vapor tension that the first vapor steam blaster 26 pressurizes, open the second valve 25 and the 3rd valve 28, close the first valve 21, the 4th valve 31 and the 5th valve 27, the steam flow of extraction is crossed the second pipeline introducing carbon dioxide acquisition equipment 10, to run carbon dioxide capture device 10.
When the network load of power generation system lower than specific second load higher than specific 3rd load time, the vapor tension pressurizeed through the first vapor steam blaster 26 can not meet the requirement of carbon dioxide capture device 10 operating pressure, and meets the requirement of carbon dioxide capture device 10 operating pressure through the vapor tension that the second vapor steam blaster 32 pressurizes.Open the 4th valve 31, close the first valve 21, second valve 25, the 3rd valve 28 and the 5th valve 29, the steam flow of extraction is crossed the 3rd pipeline 30 introducing carbon dioxide acquisition equipment 10, to run carbon dioxide capture device 10;
When the network load of power generation system is lower than specific 3rd load, the vapor tension pressurizeed through the second vapor steam blaster 32 can not meet the requirement of carbon dioxide capture device 10 operating pressure, open the second valve 25 and the 5th valve 29, close the first valve 21, the 3rd valve 28 and the 4th valve 31.At this moment, series relationship is changed into by parallel between first vapor steam blaster 26 with the second vapor steam blaster 32, first vapor steam blaster outlet steam arrives carbon dioxide capture device 10 by directly arriving carbon dioxide capture device 10 instead by after the second vapor steam blaster 32, therefore after steam stream carries out secondary booster by the first vapor steam blaster 26 and the second vapor steam blaster 32 successively, introducing carbon dioxide acquisition equipment 10, to run described carbon dioxide capture device 10.
By above-mentioned setting of the present invention, when the load of power generation system is lower, by changing the Placement of vapor steam blaster, secondary booster is carried out to the steam extracted, thus when not needing use high compressed steam sparger or extract high pressure turbine steam, the requirement of carbon dioxide capture device 10 operating pressure also can be met.
Preferably, second valve 25 and the 4th valve 31 can be set to Flow valve, when low-pressure turbine 3 exports the requirement that steam can not meet carbon dioxide capture device 10 operating pressure, and the requirement of carbon dioxide capture device 10 operating pressure is greater than through the vapor tension that the first vapor steam blaster 26 pressurizes, open the first to the three valve, close the 4th valve 30 and the 5th valve 29, by regulating the flow of the second valve 25, the vapor tension of inflow carbon dioxide capture device 10 is equaled or slightly larger than carbon dioxide capture device 10 operation needed for pressure.When the vapor tension pressurizeed through the first vapor steam blaster 26 can not meet the requirement of carbon dioxide capture device 10 operating pressure, and the requirement of carbon dioxide capture device 10 operating pressure is greater than through the vapor tension that the second vapor steam blaster 32 pressurizes, close the first valve 21 and the 5th valve 29, open the second valve 25, 3rd valve 28 and the 4th valve 31, by regulating the flow of the second valve 25 and the 4th valve 31, the vapor tension of inflow carbon dioxide capture device 10 is equaled or slightly larger than carbon dioxide capture device 10 operation needed for pressure.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claims in the present invention.
Claims (4)
1. an environment-friendly power generation system, comprise turbo machine, vapor steam blaster and carbon dioxide capture device, described turbo machine comprises high pressure turbine, middle-pressure turbine and low-pressure turbine; Described vapor steam blaster can receive low-pressure turbine outlet steam, and increases the pressure of this steam; Steam after described vapor steam blaster pressurization, introduces carbon dioxide capture device by pipeline; It is characterized in that: described vapor steam blaster comprises the first steam jet ejector and the second vapor steam blaster, parallel connection between described first vapor steam blaster and the second vapor steam blaster and series relationship can be changed according to the network load of power generation system, and by the change that steam flows to, make the requirement being met carbon dioxide capture plant running pressure by the steam of vapor steam blaster.
2. environment-friendly power generation system according to claim 1, is characterized in that: the outlet line of described low-pressure turbine is divided into two-way, and wherein a-road-through is to condenser, and an other road is divided into three-way connection (pipe) line; In described three tunnels, first via pipeline is communicated with described carbon dioxide capture device by the first valve, second road pipeline is communicated with described carbon dioxide capture device by the second valve, the first vapor steam blaster and the 3rd valve successively, three-way connection (pipe) line successively by the 4th valve and the second vapor steam blaster identical with described carbon dioxide capture device; Pipeline between described first vapor steam blaster with described 3rd valve is communicated by the entrance of the 5th valve with described second vapor steam blaster.
3. environment-friendly power generation system according to claim 2, is characterized in that: the pressurization amplitude of described second vapor steam blaster is greater than the pressurization amplitude of the first vapor steam blaster.
4. according to the operation of power networks method of the environment-friendly power generation system one of claim 1-3 Suo Shu, comprise: when the network load of power generation system be at full capacity or higher than specific first load time, described low-pressure turbine outlet steam meets the requirement of carbon dioxide capture plant running pressure, open the first valve, close the second valve to the 5th valve, the steam flow of extraction is crossed the first pipeline introducing carbon dioxide acquisition equipment, to run described carbon dioxide capture device;
When the network load of power generation system lower than specific first load higher than specific second load time, low-pressure turbine outlet steam can not meet the requirement of carbon dioxide capture plant running pressure, and the requirement of carbon dioxide capture plant running pressure is met through the vapor tension that the first vapor steam blaster pressurizes, unlatching second and the 3rd valve, close the first valve, the 4th valve and the 5th valve, the steam flow of extraction is crossed the second pipeline introducing carbon dioxide acquisition equipment, to run described carbon dioxide capture device;
When the network load of power generation system lower than specific second load higher than specific 3rd load time, vapor tension through the first vapor steam blaster pressurization can not meet the requirement of carbon dioxide capture plant running pressure, and the requirement of carbon dioxide capture plant running pressure is met through the vapor tension that the second vapor steam blaster pressurizes, open the 4th valve, close the first valve, the second valve, the 3rd valve and the 5th valve, the steam flow of extraction is crossed the 3rd pipeline introducing carbon dioxide acquisition equipment, to run described carbon dioxide capture device;
When the network load of power generation system is lower than specific 3rd load, vapor tension through the second vapor steam blaster pressurization can not meet the requirement of carbon dioxide capture plant running pressure, open the second valve and the 5th valve, close the first valve, the 3rd valve and the 4th valve, after the steam stream of extraction is carried out secondary booster by the first vapor steam blaster and the second vapor steam blaster successively, introducing carbon dioxide acquisition equipment, to run described carbon dioxide capture device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510517566.6A CN105134317B (en) | 2015-08-22 | 2015-08-22 | A kind of environment-friendly power generation system and its operation of power networks method |
| CN201610295812.2A CN105736079B (en) | 2015-08-22 | 2015-08-22 | Electricity generation system operation of power networks control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510517566.6A CN105134317B (en) | 2015-08-22 | 2015-08-22 | A kind of environment-friendly power generation system and its operation of power networks method |
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| CN201610295812.2A Division CN105736079B (en) | 2015-08-22 | 2015-08-22 | Electricity generation system operation of power networks control method |
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| CN105134317B CN105134317B (en) | 2018-05-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135927A (en) * | 2021-11-05 | 2022-03-04 | 华能海南发电股份有限公司东方电厂 | Hot press steam extraction and heat supply control method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100205964A1 (en) * | 2009-02-13 | 2010-08-19 | General Electric Company | Post-combustion processing in power plants |
| EP2333256B1 (en) * | 2009-12-08 | 2013-10-16 | Alstom Technology Ltd | Power plant with CO2 capture and method to operate such power plant |
| DE102012215569A1 (en) * | 2012-09-03 | 2014-03-06 | Siemens Aktiengesellschaft | Method for fast active power change of fossil fuel-fired steam power plants, involves diverting vapor fraction from water-vapor-working cycle as process energy for carbon dioxide-separation unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114135927A (en) * | 2021-11-05 | 2022-03-04 | 华能海南发电股份有限公司东方电厂 | Hot press steam extraction and heat supply control method and system |
| CN114135927B (en) * | 2021-11-05 | 2023-06-27 | 华能海南发电股份有限公司东方电厂 | Hot press steam extraction and heat supply control method and system |
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