CN104254673A - Combined cycle power plant - Google Patents
Combined cycle power plant Download PDFInfo
- Publication number
- CN104254673A CN104254673A CN201380015368.9A CN201380015368A CN104254673A CN 104254673 A CN104254673 A CN 104254673A CN 201380015368 A CN201380015368 A CN 201380015368A CN 104254673 A CN104254673 A CN 104254673A
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- steam
- steam turbine
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- turbine
- fed
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- 239000007789 gas Substances 0.000 claims abstract description 42
- 230000008929 regeneration Effects 0.000 claims abstract description 39
- 238000011069 regeneration method Methods 0.000 claims abstract description 39
- 238000011084 recovery Methods 0.000 claims abstract description 22
- 239000002912 waste gas Substances 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract 7
- 239000006096 absorbing agent Substances 0.000 claims abstract 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 32
- 239000007859 condensation product Substances 0.000 claims description 26
- 238000004140 cleaning Methods 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 16
- 239000001569 carbon dioxide Substances 0.000 claims description 16
- 239000006200 vaporizer Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims description 2
- 230000002745 absorbent Effects 0.000 claims 6
- 239000002250 absorbent Substances 0.000 claims 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical class [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 4
- 229910002090 carbon oxide Inorganic materials 0.000 abstract 2
- 230000001172 regenerating effect Effects 0.000 abstract 2
- 238000000746 purification Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 22
- -1 amine carbonate Chemical class 0.000 description 20
- 238000000034 method Methods 0.000 description 10
- 150000001412 amines Chemical class 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- 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
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/006—Auxiliaries or details not otherwise provided for
-
- 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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
-
- 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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/08—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with working fluid of one cycle heating the fluid in another cycle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/32—Direct CO2 mitigation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to a combined cycle power plant comprising, a gas turbine plant, a heat recovery steam generator heated by hot waste gases of a gas turbine plant, and a steam turbine plant driven by the steam produced, and a waste gas purification plant, arranged downstream of the heat recovery steam generator in which carbon oxides in the waste gases can be absorbed by an absorber fluid, which is subsequently regenerated at an elevated temperature in a regenerating section while giving up the carbon oxides for supplying to a storage, whereby the regenerating section has a heater for maintaining a necessary elevated temperature for regeneration, the heater operating with steam from the heat recovery steam generator or from the steam turbine plant, whereby the steam condenses and the resulting hot condensate can be supplied to a flash boiler where it, at low pressure,; immediately at least partially evaporates, and whereby this steam can be supplied to an appropriate stage of the steam turbine plant according to the steam pressure.
Description
Technical field
The present invention relates to combined cycle power plant (CCPP), the heat recovery steam generator (HRSG) that it comprises gas turbine equipment, utilizes the thermal exhaust from gas turbine equipment to heat, and by the steam-powered steam turbine plant that produces.
Background technique
At US 5,839, show this CCPP in 269.In the CCPP that this is known, there is provided high-pressure turbine, middle pressure turbine and low-pressure turbine to steam turbine plant, wherein, produce high and medium voltage steam in a vapor generator, to drive high pressure or middle pressure turbine, and the steam expanded in middle pressure turbine is used for driving low-pressure turbine.At US 5, in the CCPP of 839,269, also provide lower person: the steam that low pressure reduces directedly can leave the enough hot feed tank of steam generator, and is fed in the intergrade of low-pressure turbine by suitable steam inlet.
In addition, US 5,839,269 discloses a series of design for optimizing gas turbine equipment and optimizes the measure of operation of gas turbine.
Gas turbine equipment and other large-scale fuel-burning equipment are typically with the operating fuel based on hydrocarbon.This inevitably produces oxycarbide, especially carbon dioxide at run duration, and carbon dioxide is greenhouse gases, and to bad environmental, therefore should isolate carbon dioxide from the waste gas of gas turbine equipment.In principle, can use known off-gas cleaning equipment, it is arranged in corresponding burning process downstream, and has absorption sections and regeneration interval.Use amine-water-system of being formed by the amine carbonate solution comparatively concentrated, the carbon dioxide carried in absorption sections that specific waste gas flows through can be absorbed at a lower temperature.Concentrated amine carbonate solution at high temperature can change into the lower amine carbonate solution of concentration subsequently in regeneration interval, wherein, and release of carbonate dioxide, and leave and be collected subsequently and store.In order to replace such amine system, also can use other waste gas cleaning system, such as, use the system of freezing ammonia.
Substantially recognize from US 2011/0314815 A1 and downstream flue gas cleaning equipment is equipped with to above-described CCPP.Show in US 2011/0314815 A1, if gas turbine equipment runs with exhaust gas recirculatioon, make substantially only to remain hydrocarbon (that is, carbon dioxide and water (and the N of complete oxidation between main combustion period
2)), then the off-gas cleaning equipment that capacity is less can be enough.Otherwise, do not show off-gas cleaning equipment to be attached to best in CCPP.
Summary of the invention
Therefore, the object of the invention is to make CCPP be connected with off-gas cleaning equipment in the best way, to supply the necessary heat energy of regeneration interval of heating cleaning equipment, and use delayed heat to improve the performance of steam turbine plant.
Especially, according to the present invention, off-gas cleaning equipment is provided in the downstream of gas turbine equipment and heat recovery steam generation equipment, gas purifying equipment comprises absorption sections and regeneration interval, wherein, in the inside of the absorption sections that waste gas flows through, the carbon dioxide carried in waste gas is at a lower temperature by amine-water-Systemic absorption, thus form the high amine carbonate solution of concentration (comparatively), and wherein, concentrated amine carbonate solution changes into lighter amine carbonate solution at elevated temperatures in regeneration interval, thus releasing carbon dioxide, carbon dioxide is directed to be opened, wherein, used vapour thermal regeneration section, and will to produce in regeneration interval by heat exchanger, the lighter amine carbonate solution supply with the temperature of rising is returned in absorption sections for reusing, and heat energy can exchange at the lower amine carbonate solution of concentration and being fed between the higher amine carbonate solution of the concentration of regeneration interval in a heat exchanger.
According to a first aspect of the invention, the heat regenerated for making amine aqueous solution is incorporated in regeneration interval by the steam from steamturbine and/or steam generator, and uses the heat of the regenerated amine solution from the temperature with rising to carry out the directed amine carbonate solution leaving the high concentration of absorption sections of preheating.Thus substantially can reduce the heat energy made needed for amine aqueous solution regeneration.
According to preferred embodiment, use saturated vapour thermal regeneration section at a certain temperature.Temperature levels only depends on that vapor pressure is favourable, makes used vapour pressure to adjust preferred temperature.
When having the steam turbine plant of high-pressure steam turbine, medium pressure steam turbine and low-pressure steam turbine, the steam obtained for thermal regeneration section therefrom can be pressed in the connection between the outlet of turbine and the entrance of low-pressure turbine.
According to an advantageous embodiment of the invention, the condensation product of the heat produced due to thermal regeneration section can be fed to the vaporizer of heat recovery steam generator, to produce extra low pressure steam, steam can be fed to the level of low-pressure turbine subsequently, wherein, if necessary, this steam is before being incorporated in low-pressure turbine, be conducted through the superheater of steam generator, to increase its power stage.
Advantageously, the heat energy being directed away from absorption sections may be needed to can be used to the feedwater of preheating for steam generator.
Therefore only need slightly to revise steam-return line according to the present invention, with the heat energy necessary to off-gas cleaning equipment supply, and/or use the waste heat produced to improve the performance of steam turbine plant, that is, in new extra pressure level (compared with the water-vapor recycle of standard), use the condensation product of heat.
According to particularly advantageous embodiment of the present invention, the regeneration of amine aqueous solution in regeneration interval can be implemented at the temperature of 126 DEG C, this is contrary with the viable process temperature of about 145 DEG C, wherein, carbon dioxide is separated at lower than optimised process temperature from the high concentration carbon acid amide solution being fed to regeneration interval.Here this is acceptable, because therefore the necessary heat energy of thermal regeneration section disproportionately reduce, the performance of CCPP and efficiency thereof can be improved substantially.Therefore, compared with the CCPP purified without downstream flue gas, only need to tolerate less performance loss.
According to a further aspect in the invention, condensation product or the pressurized water of heat are fed at least one flash evaporator, and allow under low pressure this this place evaporation at least in part, thus discharge extra steam, to run the low-pressure steam turbine of steam turbine plant, particularly steam turbine plant.
By the condensation product of heat or pressurized water are incorporated at least one flash boiler, produce the steam that can be used to the low-pressure turbine running steam turbine plant easily, in flash boiler, condensation product or the pressurized water of heat seethe with excitement because pressure reduces rapidly, and evaporate.Thus utilize physical effect, wherein, the boiling point of liquid depends on pressure, and therefore when liquid is introduced in the space with low pressure, the liquid of heat starts unexpected boiling, and therefore evaporates at least in part.
According to a preferred embodiment of the invention, in a suitable case, a series of flash boiler can be provided, wherein, the second flash boiler is fed to from the pressurized water of the first flash boiler or condensation product, second flash boiler has the internal pressure lower than the first flash boiler, makes can here evaporate at least in part from the first flash boiler pressurized water out or condensation product.If necessary, other flash boiler can be arranged to cascade.Flash boiler in flash boiler cascade thus produce and therefore have the steam of different pressures level, wherein, the steam of each flash boiler is fed to the suitable level of turbine, is particularly fed to the low-pressure turbine of steam turbine plant.
If necessary, the steam from flash boiler can by the heat recovery steam generator apparatus overheat of CCPP, more effectively to drive corresponding turbine.
By being described in greater detail below particularly preferred embodiment of the present invention, preferred feature of the present invention can be found in claim and the following drawings describe.
The not only Feature Combination of claimed instruction or display, but also any combination of the individual characteristics of claimed display or instruction.
Accompanying drawing explanation
Accompanying drawing is shown in:
Fig. 1 illustrates according to the high-level schematic of CCPP of the present invention,
Fig. 2 is the indicative icon according to off-gas cleaning equipment of the present invention,
Fig. 3 be the regeneration interval of off-gas cleaning equipment favourable be connected to steam turbine plant CCPP or its steam generator or its low-pressure steam turbine on diagram,
Fig. 4 is from power generating equipment or the condensation product of heat of off-gas cleaning equipment or the indicative icon of the purposes of pressurized water, and
Fig. 5 is the Advantageous variants of the layout shown in Fig. 3.
Embodiment
According to Fig. 1, CCPP according to the present invention comprises gas turbine equipment 1, and it can have substantially known structure, such as, as at US 5,839 above-mentioned, in 269, and has compressor 11, at least one firing chamber 12 and gas turbine 13.The waste gas 100 of the heat of gas turbine equipment 1 flows through heat recovery steam generator 2 subsequently.What be arranged in heat recovery steam generator 2 downstream is off-gas cleaning equipment 4, is described below off-gas cleaning equipment 4.The steam driven steam turbine plant 5 produced in heat recovery steam generator 2.Gas turbine equipment 1 and steam turbine plant 5 can drive generator 3 etc. respectively, and wherein, those making the rotor shaft R of gas turbine equipment 1 and steam turbine plant 5 in principle connect and use public generator 3 to be feasible.
In order to drive steam turbine plant 5, steam-return line can be provided as described below:
By pump 7, water is fed to heater 8 from feed tank 6, heater 8 is arranged in the inside of the heat recovery steam generator 2 in exhaust path.The high pressure water such as with the pressure of 160 bar and the temperature of 300 DEG C is there is in the outlet port of heater 8.In the tubular type register (pipe register) 9 in heater 8 downstream, high pressure water evaporation and overheated, make can the outlet port of tubular type register 9 obtain high pressure steam.This overheated high pressure steam is fed to the high-pressure steam turbine 51 of steam turbine plant 5, and wherein, high pressure steam is in high-pressure turbine 51 internal expansion.The steam that (CRH (cold reheat)) expands after this manner is supplied by another tubular type register 10 subsequently, makes this steam by reheating.Steam from tubular type register 10 is fed in steam turbine plant 5 presses turbine 52, wherein steam expands in middle pressure turbine 52, make to there is low pressure steam in its downstream, if necessary, low pressure steam can be heated further in tubular type register (not shown), and is fed to the low-pressure turbine 53 of steam turbine plant 5.The steam expanded in low-pressure turbine 53 flows in Air-cooled Condenser or Water cooling type condenser 109 subsequently.The condensation product produced there supplies back feed tank 6 by pump 111 subsequently.
According to Fig. 2, off-gas cleaning equipment 4 comprises waste gas and flows through absorption sections 41 wherein and regeneration interval 42, to make the absorbing medium from section 41 regenerate, and absorption sections 41 is returned in absorbing medium supply.The waste gas 1000 not having oxycarbide is there is in the outlet port of absorption sections 41.
Inner in absorption sections 41, waste gas 100 flows through the bath of water and amine aqueous solution, and wherein, the carbon dioxide in waste gas 100 is combined with water and forms carbonic acid, forms the higher amine carbonate solution of concentration subsequently with amine.The amine carbonate solution that this concentration is higher is fed to regeneration interval 42 by pump 113.High temperature is kept in regeneration interval 42 inside, the such as temperature of about 120 DEG C to 145 DEG C, at this temperature, the amine carbonate solution that the amine carbonate solution transforms that concentration is higher becomes concentration lower, thus release of carbon dioxide in this process, wherein, carbon dioxide is fed to the (not shown)s such as storage by compressor 114.
Keep the necessary temperature of the reclaiming process in regeneration interval 42 by making the lower amine carbonate solution of the concentration of generation in regeneration interval 42 circulate in the loop with heater 115, heater is heated by steam itself, as described below.
The amine carbonate solution that concentration is lower is supplied back absorption sections 41 by pump 116, wherein, when returning, solution flows through heat exchanger 112, the amine carbonate solution being fed to the concentration of regeneration interval 42 higher also flows through heat exchanger 112 (direction along contrary), the high concentration carbon acid amide solution being fed to regeneration interval 42 is preheated, and heater 115 need compared with low_input_power to keep the necessary temperature of reclaiming process.
The heater 115 of regeneration interval 42 is preferably heated by steam, particularly saturated vapour, and the some A place in the steam path between the medium pressure steam turbine 52 of saturated vapour steam turbine plant 5 in FIG and low-pressure steam turbine 53 turns to.This steam turned in heater 115 place or condensation in heater 115, simultaneously lower to concentration amine carbonate resulting exothermic solution.Thus the temperature of the condensation product K produced is approximately the running temperature of regeneration interval 42, namely, temperature between about 120 DEG C and 145 DEG C, condensation product K can be fed to vaporizer 118 according to Fig. 3 subsequently, and is heated by the heat carrying out heat recovery steam generator 2 wherein.The pressure of the steam produced there is lower than the pressure of steam of entrance being fed to low-pressure steam turbine, and the steam produced there can be heated excessively subsequently, and is fed to the intergrade of low-pressure steam turbine 53 by suitable steam inlet.
Alternatively, the steam produced by vaporizer 118 can be fed to heater 115 together with (the being preferably heated excessively) steam turned to from an A.Dotted line in Fig. 3 shows such selection.
Alternatively, the condensation product K from heater 115 also can be incorporated in feed tank 6, and make on the one hand, therefore feedwater is heated.
Therefore, the condensation product K from heater 115 is used for producing the steam with low-down pressure, is incorporated in the intergrade of low-pressure steam turbine 53 to make steam.Therefore off-gas cleaning equipment is used for producing the 4th steam pressure levels except the steam pressure levels for the high pressure of steam turbine plant 5, middle pressure and low-pressure steam turbine.Steam turbine plant 5 and heat recovery steam generator 2 are only revised slightly by off-gas cleaning equipment 4.
Verifiedly advantageously run the regeneration interval 42 of off-gas cleaning equipment 4 at a lower temperature, secondary good in fact for reclaiming process of lower temperature.The thermal demand of heater 115 thus disproportionately reduce, the CCPP performance loss therefore caused owing to must remove heat energy at the run duration of off-gas cleaning equipment 4 keeps lower.
The absorption sections 41 of the off-gas cleaning equipment of the waste gas 100 wherein flowing through heat must be cooled, to keep the low temperature needed for absorption technique.When amine system, this temperature is about 40 DEG C, and when freezing ammonia process, this temperature is about 5 DEG C.
According to the embodiment shown in Fig. 4, be fed to the entrance of flash boiler 117 by pump 116 from the condensation product K of the heat of heater 115, wherein, regulating valve 118 is arranged in the ingress of flash boiler 117, to keep the pressure in the pipeline between flash boiler 117 and pump 116, wherein, under the prevailing temperature of condensation product K, this pressure is higher than the boiling pressure of water.In flash boiler 117, there is the pressure lower than the pressure in the pipeline between pump 116 and flash boiler 117, make the condensation product K be incorporated in flash boiler 117 more or less evaporate (flashing to steam) immediately.The low-down steam of pressure (its pressure is lower than the vapor pressure at the A place in the steam path between middle pressure turbine and low-pressure turbine) produced can be fed to the intergrade of low-pressure turbine 53 now.By the pressure using pump 116 to improve the condensation product K of heat, pressure and the amount of the flash-off steam produced in boiler 117 can be improved.
According to the advantageous variant of this embodiment, the low-down steam of pressure from flash boiler 117 can be heated excessively before being incorporated in low-pressure turbine 53 in heater 119.Heater 119 itself by the steam heating of the outlet from high-pressure turbine (CRH), or preferably can be heated by the vapor plume in heat recovery steam generator (HRSG).In principle, other thermal source any can also be used.
According to another embodiment of the invention, as shown in Figure 5, in order to replace single flash boiler 117, the flash boiler 117 of cascade (cascade), 117', 117'' can be there is into, wherein, condensation product from each flash boiler 117,117' is fed to flash boiler 117', 117'' subsequently by another regulating valve 118', 118'', wherein, pressure in flash boiler 117', 117'' subsequently, lower than the pressure in flash boiler 117 above, 117', makes the condensation product partly flash evaporation to its supply.Such as, cascade can comprise three flash boilers 117,117', 117'', as shown in Figure 5.
As mentioned above, the pump 116 in Figure 4 and 5 can be used to the pressure of the condensation product (K) improving heat, to improve pressure and the amount of flash-off steam.
After this manner, the vapor stream with the pressure reduced subsequently can guide from the flash boiler of flash boiler cascade 117,117', 117'', and is fed to the suitable not at the same level of low-pressure steam turbine 53.
In this embodiment, the vapor stream being fed to low-pressure steam turbine also can be heated excessively before being incorporated in low-pressure steam turbine 53 in suitable heater 119.Heater 119 can by the steam heating from any suitable source.
This embodiment based on the condensed water left at relatively high temperatures can under low pressure in flash boiler (partly) evaporation and the steam produced can be used for driving the general thoughts of steamturbine.
List of parts
1 gas turbine equipment
2 heat recovery steam generators
3 generators
4 off-gas cleaning equipments
5 steam turbine plants
6 feed tanks
7 pumps
8 heaters
9 tubular type registers
10 tubular type registers
The compressor of 11 1
The firing chamber of 12 1
The gas turbine of 13 1
The absorption sections of 41 4
The regeneration interval of 42 4
The high-pressure steam turbine of 51 5
The medium pressure steam turbine of 52 5
The low-pressure steam turbine of 53 5
100 waste gas
109 condensers
111 pumps
112 heat exchangers
113 pumps
114 compressors
115 heaters
116 pumps
117,117', 117'' flash boiler
118,118', 118'' regulating valve
1000 waste gas (through what purify)
A point of branching (for steam)
CRH cold reheat
K condensation product
R rotor shaft.
Claims (10)
1. a combined cycle power plant (CCPP), comprises,
-gas turbine equipment (1),
-heat recovery steam generator (2), the waste gas (100) from the heat of described gas turbine equipment (1) flows through described heat recovery steam generator (2),
-steam turbine plant (5), it is by the steam driven from described heat recovery steam generator (2), and
-be arranged in the off-gas cleaning equipment (4) in described heat recovery steam generator (2) downstream, it has absorption sections (41), in described absorption sections (41), carbon dioxide in described waste gas (100) is absorbed by absorbent fluid, wherein, described off-gas cleaning equipment (4) comprises regeneration interval (42), described regeneration interval (42) supply is mounted with to the described absorbent fluid of carbon dioxide, wherein, described absorbent fluid can regenerate at elevated temperatures, release described carbon dioxide to be used for being fed to storage simultaneously, and wherein, the absorbent fluid of described regeneration is supplied back in described absorption sections (41), for absorbing the described carbon dioxide in described waste gas (100), wherein, described regeneration interval (42) comprises heater (115), described heater (115) can utilize the described steam heating from described heat recovery steam generator (2) or described steam turbine plant (5), wherein, the steam of described supply is in described heater (115) or in described heater (115) place's condensation, and the condensation product of the heat produced (K) is fed at least one vaporizer (117, 117', 117'', 118), in at least one vaporizer described, the condensation product (K) of described heat flashes to steam at least in part, and wherein, this steam is incorporated in the level of described steam turbine plant (5), particularly be incorporated in the intergrade of described low-pressure turbine (53) of described steam turbine plant (5).
2. combined cycle power plant according to claim 1, is characterized in that,
Heat exchanger (112) is arranged between described absorbing agent section (41) and described regeneration interval (42), wherein, described absorbent fluid from described regeneration interval (42) is got back in described absorption sections (41), and is fed to described regeneration interval (42) from the described absorbent fluid of described absorption sections (41) by described heat exchanger (112).
3. combined cycle power plant according to claim 1 and 2, is characterized in that,
Use the heat energy extracted from described absorption sections (41) to carry out the fuel of preheating for described gas turbine equipment (1), or preheating is used for the feedwater of described steam turbine plant (5).
4. combined cycle power plant according to claim 1 and 2, is characterized in that,
A part for the described steam that will be produced by least one vaporizer described (117,117', 117'', 118) adds the described steam of the described heater (115) being supplied to described regeneration interval (42) to.
5. combined cycle power plant according to claim 1, is characterized in that,
By at least one vaporizer (117 described, 117', 117'', 118) the described steam produced is overheated in the heater of described heat recovery steam generator (2), and is fed to the intergrade of the described low-pressure turbine (53) of described steam turbine plant (5) subsequently.
6. combined cycle power plant according to claim 1, is characterized in that,
Described steam turbine plant (5) comprises high-pressure steam turbine (51), medium pressure steam turbine (52) and low-pressure steam turbine (53), wherein, point (A) between the outlet and the entrance of described low-pressure steam turbine (53) of described medium pressure steam turbine (52) obtains steam, for heating the described heater (115) of described regeneration interval (42).
7. combined cycle power plant according to claim 1, is characterized in that,
Described condensation product (K) is fed to into the flash boiler (117 of cascade, 117', 117''), wherein, the second flash boiler (117') is fed to from the pressurized water of the first flash boiler (117) or condensation product, described second flash boiler (117') has the internal pressure lower than described first flash boiler (117), make can evaporate at least in part from the described pressurized water of described first flash boiler (117) or condensation product, wherein, by described flash boiler (117, 117', described steam 117'') produced is fed to one or more levels of described steam turbine plant (5), particularly correspond to the described low-pressure steam turbine (53) of their different pressures.
8. combined cycle power plant according to claim 7, is characterized in that,
Before the described steam of described at least one flash boiler (117,117', 117'') is in the level being incorporated into described steam turbine plant (5), such as, utilize described heat recovery steam generator (2) overheated.
9. combined cycle power plant according to claim 7, is characterized in that,
The described steam superheating from least one flash boiler described is made by the described steam (CRH) of the described outlet of the described high-pressure steam turbine (51) from described steam turbine plant (5).
10. the combined cycle power plant according to any one in claim 1 to 9, is characterized in that,
Remaining condensate (K) from least one vaporizer described (117,117', 117'', 118) is fed to the described feed tank (6) of described steam turbine plant (5).
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP12160585.1 | 2012-03-21 | ||
| EP12160585 | 2012-03-21 | ||
| EP12185806.2 | 2012-09-25 | ||
| EP12185806 | 2012-09-25 | ||
| PCT/EP2013/055881 WO2013139884A2 (en) | 2012-03-21 | 2013-03-21 | Combined cycle power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104254673A true CN104254673A (en) | 2014-12-31 |
Family
ID=47913435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380015368.9A Pending CN104254673A (en) | 2012-03-21 | 2013-03-21 | Combined cycle power plant |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20150000249A1 (en) |
| EP (1) | EP2828492A2 (en) |
| CN (1) | CN104254673A (en) |
| IN (1) | IN2014DN07990A (en) |
| WO (1) | WO2013139884A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795345A (en) * | 2016-08-31 | 2018-03-13 | 杜尔系统股份公司 | Steam plant and the method for running steam plant |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017040201A (en) * | 2015-08-19 | 2017-02-23 | 株式会社東芝 | Power generation system and operation method for same |
| CN105477977A (en) * | 2015-12-25 | 2016-04-13 | 武汉旭日华科技发展有限公司 | Energy saving method used for active carbon granule adsorbing and recovering device |
| EP3219940B1 (en) | 2016-03-18 | 2023-01-11 | General Electric Technology GmbH | Combined cycle power plant and method for operating such a combined cycle power plant |
| WO2019084208A1 (en) * | 2017-10-25 | 2019-05-02 | Scuderi Group, Inc. | Bottoming cycle power system |
| US11346544B2 (en) * | 2019-09-04 | 2022-05-31 | General Electric Company | System and method for top platform assembly of heat recovery steam generator (HRSG) |
| US11679977B2 (en) * | 2021-09-22 | 2023-06-20 | Saudi Arabian Oil Company | Integration of power generation with methane reforming |
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- 2013-03-21 WO PCT/EP2013/055881 patent/WO2013139884A2/en active Application Filing
- 2013-03-21 IN IN7990DEN2014 patent/IN2014DN07990A/en unknown
- 2013-03-21 EP EP13711044.1A patent/EP2828492A2/en not_active Withdrawn
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Also Published As
| Publication number | Publication date |
|---|---|
| US20150000249A1 (en) | 2015-01-01 |
| IN2014DN07990A (en) | 2015-05-01 |
| WO2013139884A3 (en) | 2014-08-28 |
| EP2828492A2 (en) | 2015-01-28 |
| WO2013139884A2 (en) | 2013-09-26 |
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