CN105736079A - Operation control method of power grid of power generation system - Google Patents
Operation control method of power grid of power generation system Download PDFInfo
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- CN105736079A CN105736079A CN201610295812.2A CN201610295812A CN105736079A CN 105736079 A CN105736079 A CN 105736079A CN 201610295812 A CN201610295812 A CN 201610295812A CN 105736079 A CN105736079 A CN 105736079A
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- steam
- carbon dioxide
- valve
- generation system
- dioxide capture
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/04—Using steam or condensate extracted or exhausted from steam engine plant for specific purposes other than heating
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides an operation control method of a power grid of a power generation system. The operation control method comprises the following steps: when the load of the power grid of the power generation system is relatively low, carrying out secondary pressurizing on pumped steam in a manner of connecting a first steam injector and a second steam injector in series, and conveying the steam subjected to the secondary pressurizing into a carbon dioxide capturing device; when the load of the power grid of the power generation system is moderately low, pressurizing the pumped steam through the second steam injector and conveying the pressurized steam into the carbon dioxide capturing device; when the load of the power grid of the power generation system is moderately high, pressurizing the pumped steam through the first steam injector and conveying the pressurized steam into the carbon dioxide capturing device; when the load of the power grid of the power generation system is relatively high, directly conveying the pumped steam into the carbon dioxide capturing device.
Description
Technical field
The present invention relates to a kind of electricity generation system, especially relate to a kind of environment-friendly power generation system with carbon dioxide capture device and operation of power networks method thereof.
Background technology
In recent years, the generation of greenhouse gases clearly results in global warming, and the generation of greenhouse gases increases further by more increase from global warming.Due to the greenhouse gases that carbon dioxide is considered as main, therefore, discharge in a large number and the Global climate change that causes with the greenhouse gases that carbon dioxide is representative, being one of the most serious and problem needing most urgent solution of facing at present of the mankind, carbon is caught and stored is considered as reduce greenhouse gases discharge into the atmosphere and control a kind of possible Main Means of global warming.
Carbon dioxide mostlys come from the burning of Fossil fuel, and the flue gas of conventional power plants generally comprises the carbon dioxide of from about 4% to about 14%.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 plants account for the 40～50% of whole nation CO2 emission total amount.Therefore, Development of Novel environment-friendly power generation system, reduce CO2 emissions, the importance for coal fired power plant or even whole society's carbon emission reduction is self-evident.
It is now recognized that the collecting carbonic anhydride technology closest to large-scale industrial application is after-combustion trapping.In after-combustion traps, removing carbon dioxide from flue gas, residue flue gas is discharged into the atmosphere and is used for carbon dioxide compression transporting and storing.In the multiple application such as the carbon dioxide being captured may be used for sealing up for safekeeping, methanol manufacture and three recovery of oil.
Chemical absorbing carbon dioxide separation method be one be widely used, adaptable flue gas decarbonization Technology.It utilizes to absorb removes carbon dioxide from burning gases, and followed by steam stripping regeneration solvent and catch the carbon dioxide comprised in a solvent.But this method needs warm in consumption to supply Analytic Tower, to realize the carbon dioxide resolving in Analytic Tower.For providing this partial heat, it is necessary to extract the steam of specified pressure from steam turbine cycle stream for heating Analytic Tower reboiler.
In prior art, 201110172955.1 patent of invention propose a kind of generating equipment with carbon dioxide capture and compression, wherein by using the connection of Clutch Control steam turbine and electromotor, so that allowing can operating flexibly of carbon dioxide capture systems and compressor according to load.201080063370.X patent of invention disclose a kind of TRT with carbon dioxide capture, it is by using two steam jet ejectors, load according to TRT selects to use one of them for increasing the steam pressure extracted from TRT vapour-cycling, so that it meets the demand of operating pressure of carbon dioxide capture device.
201080063370.X patent of invention make the steam pressure of extraction meet the demand of operating pressure of carbon dioxide capture device by steam jet ejector.But it is when the load of TRT is relatively low, in order to meet the demand of the operating pressure of carbon dioxide capture device, only by even directly extracting steam from boiler export from the high pressure section of steam turbine or using the steam jet ejector that pressurization amplitude is higher.And if cause that the steam of acting reduces, and can reduce the generating efficiency of system from the drawn upstream steam of steam turbine, if using the higher vapor steam blaster of pressurization amplitude, 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 more high compressed steam ejector need not be used, it is also possible to make the steam pressure extracted from steam turbine low pressure stage meet the demand of operating pressure of carbon dioxide capture device.
As one aspect of the present invention, it is provided that a kind of environment-friendly power generation system, including turbine, vapor steam blaster and carbon dioxide capture device, described turbine includes pressure turbine, middle-pressure turbine and low-pressure turbine；Described vapor steam blaster is able to receive that low-pressure turbine outlet steam, and increases the pressure of this steam；Steam after the pressurization of described vapor steam blaster, is introduced carbon dioxide capture device by pipeline；Described vapor steam blaster includes the first steam jet ejector and the second vapor steam blaster, network load according to electricity generation system could alter that the parallel connection between described first vapor steam blaster and the second vapor steam blaster and series relationship, and by the change that steam flows to, make the steam by vapor steam blaster meet the requirement of carbon dioxide capture plant running pressure.
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 passes sequentially through the second valve, the first vapor steam blaster and the 3rd valve and communicates with described carbon dioxide capture device, and it is identical with described carbon dioxide capture device that three-way connection (pipe) line passes sequentially through the 4th valve and the second vapor steam blaster；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 more 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 through the steam pressure of the first vapor steam blaster pressurization more than the requirement of carbon dioxide capture plant running pressure, open the first to the 3rd flow valve, close the 4th valve and the 5th valve, by regulating the flow of the second valve, the steam pressure of inflow carbon dioxide capture device is made to be equal to or slightly greater than the operation desirable pressure of carbon dioxide capture device.
Preferably, when the steam pressure through the first vapor steam blaster pressurization can not meet the requirement of carbon dioxide capture plant running pressure, and through the steam pressure of the second vapor steam blaster pressurization more than the requirement of carbon dioxide capture plant running pressure, close the first valve and the 5th valve, open the second valve, the 3rd valve and the 4th valve, by regulating the second valve and the flow of the 4th valve, the steam pressure of inflow carbon dioxide capture device is made to be equal to or slightly greater than the operation desirable pressure of carbon dioxide capture device.
As another aspect of the present invention, provide the operation of power networks method of above-mentioned environment-friendly power generation system, including following flow process: when the network load of electricity generation system is at full capacity or is higher than specific first load, 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 electricity generation system is higher than specific second load lower than specific first load, low-pressure turbine outlet steam can not meet the requirement of carbon dioxide capture plant running pressure, and the steam pressure pressurizeed through the first vapor steam blaster meets the requirement of carbon dioxide capture plant running pressure, 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 electricity generation system is higher than specific three load lower than specific second load, steam pressure through the first vapor steam blaster pressurization can not meet the requirement of carbon dioxide capture plant running pressure, and the steam pressure pressurizeed through the second vapor steam blaster meets the requirement of carbon dioxide capture plant running pressure, 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 electricity generation system is lower than specific three load, steam pressure 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, the steam stream of extraction is passed sequentially through the first vapor steam blaster and after the second vapor steam blaster carries out secondary booster, 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.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Referring to the embodiment of the environment-friendly power generation system of the present invention shown in Fig. 1, it includes steam generator 6, steam turbine plant, electromotor 5, vapor steam blaster, carbon dioxide capture device 10 and condenser 7.Steam generator 6 is used for by the water entering its inside is heated, and produces the high compressed steam for generating electricity.Steam turbine plant includes pressure turbine 1, middle-pressure turbine 2 and low-pressure turbine 3, and it is arranged on common axis 4.The steam that steam generator 6 generates is by, after pressure turbine 1, after being heated by reheating pipeline, passing sequentially through middle-pressure turbine, low-pressure turbine 3, thus driving coupled electromotor 5 and producing 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, is condensed into condensed water in condenser 7, by heating and after degassing apparatus, again being imported steam generator 6 by wire 8, be circulated；Additionally lead up to vapor steam blaster or either directly through pipeline arrive carbon dioxide capture device catching for carbon dioxide.
Vapor steam blaster includes the first steam jet ejector 26 and the second vapor steam blaster 32, and it can will be pressurizeed by steam therein, and wherein the pressurization amplitude of the second vapor steam blaster 32 is more 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 passes sequentially through second valve the 25, first vapor steam blaster 26 and the 3rd valve 28 communicates 10 with carbon dioxide capture device；Three-way connection (pipe) line 30 passes sequentially through 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 and 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 includes such as based on the absorber of freezing ammonia or amine technological operation with for compressing one or more carbon-dioxide gas compressors of the carbon dioxide extracted from aerofluxus.The carbon dioxide being captured and compressed is transported to storage or transportation facility by means of pipeline 11.Not carbonated gas is released to air or leads to separate further or process via pipeline 12.The condensate water of carbon dioxide capture process is directed to steam generator 6 by pipeline 13.
The operation of power networks method of the electricity generation system of the embodiment of the present invention, including following flow process.When the network load of electricity generation system is at full capacity or is higher than specific first load, low-pressure turbine 3 exports steam and meets the requirement of 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 electricity generation system is higher than specific second load lower than specific first load, low-pressure turbine 3 exports steam can not meet the requirement of carbon dioxide capture device 10 operating pressure, and the steam pressure pressurizeed through the first vapor steam blaster 26 meets the requirement of carbon dioxide capture device 10 operating pressure, open the second valve 25 and the 3rd valve 28, close the first valve the 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 electricity generation system is higher than specific three load lower than specific second load, steam pressure through the first vapor steam blaster 26 pressurization can not meet the requirement of carbon dioxide capture device 10 operating pressure, and the steam pressure pressurizeed through the second vapor steam blaster 32 meets the requirement of carbon dioxide capture device 10 operating pressure.Open the 4th valve 31, close the first valve the 21, second valve the 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 electricity generation system is lower than specific three load, steam pressure through the second vapor steam blaster 32 pressurization 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 the 21, the 3rd valve 28 and the 4th valve 31.At this moment, changed into series relationship by parallel between first vapor steam blaster 26 with the second vapor steam blaster 32, first vapor steam blaster outlet steam is by directly arriving carbon dioxide capture device 10 instead by arriving carbon dioxide capture device 10 after the second vapor steam blaster 32, therefore steam stream passes sequentially through the first vapor steam blaster 26 and after the second vapor steam blaster 32 carries out secondary booster, introducing carbon dioxide acquisition equipment 10, to run described carbon dioxide capture device 10.
By the above-mentioned setting of the present invention, when the load of electricity generation system is relatively low, by changing the connected mode of vapor steam blaster, the steam extracted is carried out secondary booster, thus when high compressed steam ejector need not be used or extracts pressure turbine steam, it is also possible to meet the requirement of carbon dioxide capture device 10 operating pressure.
Preferably, second valve 25 and the 4th valve 31 can be set to flow valve, the requirement of carbon dioxide capture device 10 operating pressure can not be met when low-pressure turbine 3 exports steam, and through the steam pressure of the first vapor steam blaster 26 pressurization more than the requirement of carbon dioxide capture device 10 operating pressure, open the first to the 3rd valve, close the 4th valve 30 and the 5th valve 29, by regulating the flow of the second valve 25, the steam pressure of inflow carbon dioxide capture device 10 is made to be equal to or slightly greater than the operation desirable pressure of carbon dioxide capture device 10.When the steam pressure through the first vapor steam blaster 26 pressurization can not meet the requirement of carbon dioxide capture device 10 operating pressure, and through the steam pressure of the second vapor steam blaster 32 pressurization more than the requirement of carbon dioxide capture device 10 operating pressure, close the first valve 21 and the 5th valve 29, open the second valve the 25, the 3rd valve 28 and the 4th valve 31, by regulating the flow of the second valve 25 and the 4th valve 31, the steam pressure of inflow carbon dioxide capture device 10 is made to be equal to or slightly greater than the operation desirable pressure of carbon dioxide capture device 10.
Certainly; the present invention also can have other various embodiments; when without departing substantially from present invention spirit and essence thereof, those of ordinary skill in the art can make various corresponding change and deformation according to the present invention, but these change accordingly and deform the protection domain that all should belong to the claims in the present invention.
Claims (1)
1. an electricity generation system operation of power networks control method, including: when the network load of electricity generation system is relatively low, the connected mode that first vapor steam blaster and the second vapor steam blaster are connected, the steam extracted is carried out secondary booster, the steam after secondary booster is transported to foot carbon dioxide capture device；In the network load of electricity generation system is in low time, by the second vapor steam blaster to extract steam carry out supercharging, the steam after supercharging is transported to foot carbon dioxide capture device；In the network load of electricity generation system is in high time, by the first vapor steam blaster to extract steam carry out supercharging, the steam after supercharging is transported to foot carbon dioxide capture device；When the network load of electricity generation system is in higher, directly the steam of extraction is transported to foot carbon dioxide capture device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610295812.2A CN105736079B (en) | 2015-08-22 | 2015-08-22 | Electricity generation system operation of power networks control method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN201510517566.6A Division 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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| CN105736079A true CN105736079A (en) | 2016-07-06 |
| CN105736079B CN105736079B (en) | 2018-08-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4528811A (en) * | 1983-06-03 | 1985-07-16 | General Electric Co. | Closed-cycle gas turbine chemical processor |
| DE3616797A1 (en) * | 1986-05-17 | 1987-11-19 | Koerting Ag | Steam turbine system |
| EP0851971B1 (en) * | 1995-09-22 | 2001-12-12 | STEAG encotec GmbH | Process and device for preheating the feed water to a steam generator in power station processes |
| CN102741508A (en) * | 2009-12-08 | 2012-10-17 | 阿尔斯通技术有限公司 | Power plant with c02 capture and method to operate such power plant |
-
2015
- 2015-08-22 CN CN201610295812.2A patent/CN105736079B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4528811A (en) * | 1983-06-03 | 1985-07-16 | General Electric Co. | Closed-cycle gas turbine chemical processor |
| DE3616797A1 (en) * | 1986-05-17 | 1987-11-19 | Koerting Ag | Steam turbine system |
| EP0851971B1 (en) * | 1995-09-22 | 2001-12-12 | STEAG encotec GmbH | Process and device for preheating the feed water to a steam generator in power station processes |
| CN102741508A (en) * | 2009-12-08 | 2012-10-17 | 阿尔斯通技术有限公司 | Power plant with c02 capture and method to operate such power plant |
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| CN105736079B (en) | 2018-08-03 |
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Effective date of registration: 20180625 Address after: 510000 East 501, No. 64, 66, Jianzhong Road, Tianhe District, Guangzhou, Guangdong. Applicant after: Guangdong southeast transmission and Transformation Engineering Co.,Ltd. Address before: 215124 46 Xingguo Road, Guo Xiang, Wuzhong District, Suzhou, Jiangsu Applicant before: Zhao Dongxu |
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Address after: 510000 East 501, No. 64, 66, Jianzhong Road, Tianhe District, Guangzhou, Guangdong. Patentee after: GUANGDONG DN ENERGY SYSTEM TECHNOLOGY Co.,Ltd. Address before: 510000 East 501, No. 64, 66, Jianzhong Road, Tianhe District, Guangzhou, Guangdong. Patentee before: Guangdong southeast transmission and Transformation Engineering Co.,Ltd. |
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Granted publication date: 20180803 |