CN106499455A - Combined-cycle power plant's soda pop backheat and fuel heating integrated put forward effect system - Google Patents

Combined-cycle power plant's soda pop backheat and fuel heating integrated put forward effect system Download PDF

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Publication number
CN106499455A
CN106499455A CN201611180061.6A CN201611180061A CN106499455A CN 106499455 A CN106499455 A CN 106499455A CN 201611180061 A CN201611180061 A CN 201611180061A CN 106499455 A CN106499455 A CN 106499455A
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CN
China
Prior art keywords
fuel
soda pop
heat
steam
heat exchanger
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Pending
Application number
CN201611180061.6A
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Chinese (zh)
Inventor
郑赟
邓宏伟
朱坤峰
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China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
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China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
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Application filed by China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd filed Critical China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
Priority to CN201611180061.6A priority Critical patent/CN106499455A/en
Publication of CN106499455A publication Critical patent/CN106499455A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02Plants 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
    • F01K23/06Plants 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
    • F01K23/10Plants 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
    • F01K23/106Plants 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 with water evaporated or preheated at different pressures in exhaust boiler
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02CGAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/04Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02CGAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
    • F02C6/18Plural 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02CGAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/22Fuel supply systems
    • F02C7/224Heating fuel before feeding to the burner
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22DPREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00Feed-water supply not provided for in other main groups
    • F22D11/02Arrangements of feed-water pumps
    • F22D11/06Arrangements of feed-water pumps for returning condensate to boiler
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • F23K1/04Heating fuel prior to delivery to combustion apparatus
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/16Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

Abstract

The invention discloses a kind of combined-cycle power plant's soda pop backheat and fuel heating integrated put forward effect system, including combustion engine unit, the admission line being connected with the combustion engine unit and feed pipe, the waste heat boiler being connected with the combustion engine machine set outlet, the chimney being connected with the waste heat boiler, and the steam unit being connected with the waste heat boiler, the soda pop heat regenerative system of the steam turbine connection, connect the fuel recycle pre-heating system of the feed pipe and waste heat boiler.Combined-cycle power plant's soda pop backheat proposed by the present invention and the integrated combined cycle thermal efficiency for putting forward effect system, improving entirety of fuel heating, reduces cost.

Description

Combined-cycle power plant's soda pop backheat and fuel heating integrated put forward effect system
Technical field
The present invention relates to gas combustion-gas vapor combined cycle technical field, more particularly to a kind of combined-cycle power plant's soda pop time The heating of hot and fuel is integrated to put forward effect system.
Background technology
With social development, the mankind are growing for the demand of the energy.As gas turbine has efficiency high, cost Low, environmental friendliness, the advantages of take up an area less, regulate and control flexible, Combined cycle gas-steam turbine unit or with gas turbine as main frame It is to realize energy-saving and emission-reduction and the generation technology that actively develops that Poly-generation engineering has become countries in the world.In China, due to combustion gas Steam Combined Cycle unit is used as peak load regulation network frequency modulation in addition to heat supply, more, while the year to generating set is run Hourage also has strict control, and therefore generating set tends not to generate electricity at full capacity.But, Combined cycle gas-steam turbine unit Underload generate electricity when relatively inefficient, it is therefore desirable to further investigate, how to make combined-cycle power plant efficiently using the energy with Reduce gas consumption, and the thermal efficiency for how improving Combined cycle gas-steam turbine unit.
And, the thermal efficiency of Combined cycle gas-steam turbine unit mainly includes combustion gas cycle efficieny (gas turbine powered generator The group thermal efficiency) and steam cycle efficiency (the steam turbine generator group thermal efficiency), improve the heat of Combined cycle gas-steam turbine unit The approach of efficiency namely improves the one or two kinds of efficiency of the two parts.Steam cycle efficiency main path is improved, is By increasing the steam inlet condition of steam turbine so as to improving the mechanical efficiency of steam turbine.Additionally, the heat caused during chimney emission Loss is the maximum heat loss of waste heat boiler, carries out deep exploitation by reduction chimney emission temperature to fume afterheat and can reduce this Heat loss is planted, residual heat boiler for exchanging heat efficiency can be improved, so as to the thermal efficiency of steam circulation can be improved.
In conventional art, in Combined cycle gas-steam turbine power plant, the smoke evacuation temperature according to gas turbine is generally used Degree and flow, select the steam turbine and waste heat boiler of higher pressure and higher temperature, high parameter steam is obtained in steam turbine The mechanical efficiency of get Geng Gao, so that improve the thermal efficiency of whole Combined cycle gas-steam turbine unit.But, this method needs to steam Steam turbine, waste heat boiler and system pipeline select the more preferable material of heat resisting and pressure resisting performance, and steam turbine and waste heat boiler are Topmost part in power plant's main equipment investment, can directly be dramatically increased power plant's initial cost in this way, cause to throw Money payoff period is longer.Either for new-built unit still transforms old unit, cost is all higher, is unfavorable for promoting.
Additionally, in order to carry out deep exploitation to fume afterheat in conventional art, it will usually change in waste heat boiler afterbody increase Hot face increases afterbody heat exchanger, using desalination aqueous medium in increasedd heat exchanger internal circulation heat-exchanging, makes the smoke evacuation temperature of chimney Degree is reduced to 60~80 DEG C, and demineralized water can only achieve 80~95 DEG C after being heated, and temperature is relatively low can not to be followed by the soda pop of itself Loop systems are utilized, and can only be provided out to heat user, so as to obtain the doulbe-sides' victory that external heat supply and the unit operation thermal efficiency are lifted.But It is that the mode of this flue gas deep exploitation is affected with thermal property by heat user, for example, is reduced with thermic load is seasonal, very When thermic load is not used, then power plant cannot utilize this fume afterheat to improve the operational efficiency of combined cycle.
Additionally, also having in conventional art by pressure saturation water extraction section in the high temperature by waste heat boiler to gas turbine Fuel is heated, so as to improve the technology of gas turbine mechanical efficiency and stability.But, this first technology can loss section Divide the superheated steam that can be done work, although increased the combustion gas cycle efficieny of gas turbine, but the steaming of steam turbine can be reduced Vapour cycle efficiency, improves to the overall combined cycle thermal efficiency limited;Furthermore, due to pressing in this part high temperature in waste heat boiler Saturation water is extracted from the steam/water circulating of steam turbine, returns in former steam/water circulating and reach self-loopa after heating fuel, when Steam/water circulating is entered when fuel is leaked, and eventually enters into the risk that blast occur in steam turbine and its aid system.
Content of the invention
This is based on, for the problems referred to above, the present invention proposes a kind of combined-cycle power plant's soda pop backheat and fuel heating is integrated Effect system is put forward, the overall combined cycle thermal efficiency, reduces cost is improved.
Its technical scheme is as follows:
A kind of combined-cycle power plant's soda pop backheat and fuel heating integrated put forward effect system, including combustion engine unit, with the combustion The admission line and feed pipe of machine unit connection, the waste heat boiler being connected with the combustion engine machine set outlet, with the waste heat pot The chimney of stove connection, and the steam unit being connected with the waste heat boiler, connect the combustion of the feed pipe and waste heat boiler Material circulation pre-heating system;
The steam unit includes the steam turbine being connected with described waste heat boiler one end, connects with described steam turbine one end The steam-driven generator for connecing, the condenser being connected with the steam turbine other end, the condensate pump being connected with the condenser, and The condensate pump is connected with the waste heat boiler, and connects the soda pop time of the steam turbine, condenser and waste heat boiler Hot systems;
The soda pop heat regenerative system includes the soda pop Recuperative heat exchanger being connected between the steam turbine and condenser, with Shi Suoshu soda pop Recuperative heat exchangers are also attached between the condensate pump and the waste heat boiler other end.
Below its further technical scheme is illustrated:
Further, the waste heat boiler includes the residual heat flue that one end is connected, the waste heat cigarette with the combustion engine unit The road other end is connected with the chimney;
And the flue gas heat-exchange unit being arranged in the residual heat flue, the flue gas heat-exchange unit include condensate water inlet and Vapor outlet, the Vapor outlet are connected with the steam turbine, and the condensate water inlet is changed with the soda pop backheat Hot device connection.
Further, the steam turbine includes middle cylinder or steam, and the extraction opening being arranged in the middle cylinder or steam, institute State soda pop Recuperative heat exchanger to be connected with the extraction opening.
Further, the soda pop heat regenerative system also includes being arranged between the soda pop Recuperative heat exchanger and condenser Drain valve.
Further, the fuel recycle pre-heating system includes the afterheat heat exchanger for being arranged at the residual heat flue afterbody, The fuel heat exchangers being arranged on the feed pipe, connect the preheating of the afterheat heat exchanger outlet and fuel heat exchangers import Water inlet pipe, connects the preheating return pipe of the fuel heat exchangers outlet and afterheat heat exchanger import, and is connected to the preheating Delivery pump on return pipe.
Further, the fuel recycle pre-heating system also includes the sweet-water tank being arranged on the preheating return pipe, And the sweet-water tank is located between the delivery pump and fuel heat exchangers outlet.
Further, the fuel recycle pre-heating system also includes the Flow-rate adjustment being arranged on the preheating water inlet pipe Valve, the flow control valve are located between the fuel heat exchangers import and afterheat heat exchanger outlet.
Further, the soda pop Recuperative heat exchanger, flue gas heat-exchange unit, afterheat heat exchanger, fuel heat exchangers are disposed as Low-pressure performance heater.
Further, the soda pop Recuperative heat exchanger, flue gas heat-exchange unit, afterheat heat exchanger, fuel heat exchangers are disposed as Board-like or pipe heat exchanger.
Further, the combustion engine unit include connect turbine, combustor, compressor, and with the compressor The gas electricity generator of connection, and the admission line is connected with the compressor, the feed pipe is connected with the combustor, The turbine is connected with the waste heat boiler.
The present invention has the beneficial effect for projecting as follows:By arranging soda pop heat regenerative system and fuel recycle pre-heating system, Adjust enter waste heat boiler in condensing water temperature, so as to pass through adjust waste heat boiler in flue-gas temperature and between gas turbine Desalination coolant-temperature gage, adjust fuel temperature, make the fuel before entrance gas turbine obtain higher temperature.
Description of the drawings
Fig. 1 is that the backheat of combined-cycle power plant's soda pop described in the embodiment of the present invention and fuel heat the integrated knot for putting forward effect system Structure schematic block diagram.
Description of reference numerals:
100- feed pipes, 200- admission lines, 300- combustion engine units, 310- turbines, 320- combustor, 330- are calmed the anger Machine, 340- gas electricity generators, 400- waste heat boilers, 410- residual heat flues, 420- flue gas heat-exchange units, 500- fuel recycles preheating system System, 510- afterheat heat exchangers, 520- fuel heat exchangers, 530- preheat water inlet pipe, and 532- flow control valves, 540- preheat backwater Pipe, 542- delivery pumps, 550- sweet-water tanks, 600- chimneys, 700- steam units, 710- steam turbines, 720- condensers, 730- Condensate pump, 740- soda pop Recuperative heat exchangers, 750- drain valves, 760- steam-driven generators.
Specific embodiment
Below in conjunction with the accompanying drawings embodiments of the invention are described in detail.
As shown in figure 1, a kind of combined-cycle power plant's soda pop backheat and fuel heating integrated put forward effect system, including combustion engine unit 300, the admission line 200 being connected with the combustion engine unit 300 and feed pipe 100 are connected with the combustion engine unit 300 outlet Waste heat boiler 400, the chimney 600 being connected with the waste heat boiler 400, and the steam being connected with the waste heat boiler 400 Unit 700.Gas combustion-gas vapor combined cycle factory with combustion engine unit 300 and steam unit 700 as main frame, by admission line 200 and feed pipe 100 supply air and fuel to combustion engine unit, and mixing air and fuel are carried out in combustion engine unit 300 Burning, is generated electricity using the flue gas acting for producing.Meanwhile, remaining heat can be brought into by the smoke evacuation after the acting of combustion engine unit 300 In waste heat boiler 400, heating WATER AS FLOW MEDIUM is changed into high parameter steam, and the flue gas of cooling can be discharged from chimney 600, and high parameter steam The acting of steam unit 700 can be entered to generate electricity or heat supply, steam condenses into water after doing work in steam unit 700, and enters again Enter 400 increasing temperature and pressure of waste heat boiler and be changed into high parameter steam, high parameter steam enters the acting of steam unit 700 again and generates electricity or supply Heat, so that form steam thermodynamic cycle.
And, the combustion engine unit 300 include connect turbine 310, combustor 320, compressor 330, and with institute The gas electricity generator 340 of the connection of compressor 330 is stated, and the admission line 200 is connected with the compressor 330, the charging Pipeline 100 is connected with the combustor 320, and the turbine 310 is connected with the waste heat boiler 400.Mixing air is by air inlet Pipeline 200 enters compressor 330, and discharges into combustor 320 after being boosted by compression, while fuel enters combustion by feed pipe 100 Burn room 320, air and fuel mixed combustion in combustor 320 and produce high-temperature flue gas, high-temperature flue gas promote turbine 310 to do Work(, do work produce portion of energy be delivered to compressor 330 can compressed air, remainder energy transmission is to fuel gas generation Machine 340 generates electricity.Additionally, the flue gas for finishing work(in turbine 310 can be drained in waste heat boiler 400, and just remaining heat Amount brings waste heat boiler 400 into.
Additionally, the steam unit 700 includes the steam turbine 710 being connected with 400 one end of the waste heat boiler, and described The steam-driven generator 760 of 710 one end of steam turbine connection, the condenser 720 being connected with 710 other end of the steam turbine, with The condensate pump 730 of the connection of the condenser 720, and the condensate pump 730 is connected with the waste heat boiler 400.And, institute State the residual heat flue 410 that waste heat boiler 400 includes that one end is connected with the combustion engine unit, 410 other end of the residual heat flue with The chimney 600 connects, and the flue gas heat-exchange unit 420 being arranged in the residual heat flue 410.The flue gas heat-exchange unit 420 Including condensate water inlet and Vapor outlet, the Vapor outlet is connected with the steam turbine 710, and the condensate enters The mouth of a river is connected with condensate pump 730.The flue gas that discharges from combustion engine unit 300 enters the residual heat flue 410 of waste heat boiler 400 In, with residual heat flue 410 in flue gas heat-exchange unit 420 in condensate exchanged heat, condensate is heated into superheated steam, and Superheated steam is transported in steam turbine 710 and orders about operating acting, so as to drive the steam being connected with steam turbine 710 Electromotor 760 generates electricity.Exhaust steam after the acting of steam turbine 710, in the cooled condensate for being formed of condenser 720, through condensing Water pump 730 is sent the flue gas heat-exchange unit 420 of waste heat boiler back to and is exchanged heat after boosting, re-form superheated steam and be conveyed to steam turbine 710 actings, to form steam/water circulating.
Additionally, the steam unit 700 also includes connecting the steam turbine 710, condenser 720 and waste heat boiler 400 Soda pop heat regenerative system.The soda pop heat regenerative system includes the soda pop being connected between the steam turbine 710 and condenser 720 Recuperative heat exchanger 740, while the soda pop Recuperative heat exchanger 740 is also attached to the condensate pump 730 and waste heat boiler 400 is another Between one end.Exhaust steam after the acting of steam turbine 710, in the cooled condensate for being formed of condenser 720, through condensate pump Middle temperature condensate is heated into by 740 steam of soda pop Recuperative heat exchanger of soda pop heat regenerative system first after 730 boostings, then to waste heat pot Stove 400 supplies water.Flue gas recirculation in the flue gas heat-exchange unit 420 of waste heat boiler 400 after middle temperature condensate and gas turbine acting Heat exchange, forms superheated steam, finally enters the acting of steam turbine 710 and completes steam/water circulating.Wherein, the soda pop of soda pop heat regenerative system The heat source side of Recuperative heat exchanger 740 is some vapor extracted from steam turbine 710, and some vapor is in the heat exchange of soda pop backheat Hydrophobic, and the condensation hydration entered after condenser 720 is done work with steam turbine 710 is cooled in device 740 after heat-setting water And.By arrange steam/water circulating soda pop heat regenerative system, will not reduce enter steam turbine 710 quantity of steam, but improve into Enter the initial temperature of the condensate of waste heat boiler 400, so as to improve the average endothermic temperature of thermodynamic cycle, improve steam and follow Ring efficiency.
And, the steam turbine 710 includes middle cylinder or steam, and the extraction opening being arranged in the middle cylinder or steam, institute State soda pop Recuperative heat exchanger 740 to be connected with the extraction opening.I.e. described soda pop Recuperative heat exchanger 740 is by steam turbine 710 In middle cylinder or steam arrange extraction opening extract some vapor, using some vapor in soda pop Recuperative heat exchanger 740 with condensation Water exchanges heat to form middle temperature condensate.It is additionally, since condensate to be heated, causes flue gas heat-exchange unit obtain more heat exchange Energy, the steam that can produce high pressure at higher temperature enter steam turbine acting, therefore, extract steam not from the middle part of steam turbine 710 The normal acting ability of steam turbine 710 can be reduced, will not also be caused the vapor (steam) temperature for extracting too low and be affected to condensate Heat exchange.Additionally, the soda pop heat regenerative system also includes being arranged between the soda pop Recuperative heat exchanger 740 and condenser 720 Drain valve 750.By drain valve 750, the hydrophobic amount that discharges from soda pop Recuperative heat exchanger 740 can be adjusted, it is also possible to adjust Enter the quantity of steam of soda pop Recuperative heat exchanger 740.By arranging soda pop Recuperative heat exchanger 740, entrance waste heat boiler can be adjusted 400 condensate water temperature, so as to affect the temperature of 400 tail flue gas of waste heat boiler, enables the utilization of the waste heat to waste heat boiler Enough it is automatically adjusted under optimal operating parameter according to the different operating conditions of combustion engine unit.
Additionally, combined-cycle power plant's soda pop backheat and fuel heat the integrated effect system that puies forward also to include connecting the charging The fuel recycle pre-heating system 500 of pipeline 100 and waste heat boiler 400.Waste heat can be utilized by fuel recycle pre-heating system 500 The flue gas heat of boiler 400, heats the fuel temperature in feed pipe 100.
Further, the fuel recycle pre-heating system 500 includes that the waste heat for being arranged at 410 afterbody of the residual heat flue is changed Hot device 510, the fuel heat exchangers 520 being arranged on the feed pipe 100 connect the afterheat heat exchanger 510 and export and fire The preheating water inlet pipe 530 of material 520 import of heat exchanger, connects the outlet of fuel heat exchangers 520 and 510 import of afterheat heat exchanger Preheating return pipe 540, and the delivery pump 542 being connected on the preheating return pipe.By arranging fuel recycle pre-heating system 500, in gas turbine fuel heated side, demineralized water, by delivery pump 542 is set on preheating return pipe 540, is transported to waste heat pot In the afterheat heat exchanger 510 arranged in the residual heat flue 410 of 400 afterbody of stove, it is heated to by the fume afterheat of residual heat flue afterbody High temperature demineralized water is formed at relatively high temperatures, high temperature demineralized water is by preheating 530 incoming fuel heat exchanger 520 of water inlet pipe and feed pipe In 100, fuel is exchanged heat, the temperature that the fuel in feed pipe 100 is heated to the operation of gas turbine highly effective and safe.Heat exchange High temperature demineralized water afterwards is subsequently cooled, and is transported to afterheat heat exchanger by preheating the delivery pump 542 arranged on return pipe 540 Proceed to exchange heat in 510, form closed cycle.Additionally, pass through to arrange afterheat heat exchanger 510 in 400 afterbody of waste heat boiler, can With 400 tail flue gas used heat of recovery waste heat boiler, and absorbing enough flue gas heats makes fuel obtain higher temperature, reaches and carries The purpose of high gas turbine proficiency.And, fume afterheat can be fully absorbed by afterheat heat exchanger 510, reduce waste heat boiler 400 exhaust gas temperatures, reduce boiler exhaust gas loss, improve residual heat boiler for exchanging heat efficiency, and the exhaust gas temperature of waste heat boiler reduces, from And reduce and discharge to the thermal pollution of air, while there is preferable social benefit; And, the fuel heat exchangers 520 are set to Low-pressure performance heater, the fuel heat exchangers 520 of low-pressure performance, while heat exchange property is ensured, can be with reduces cost.
Additionally, the fuel recycle pre-heating system 500 also includes the sweet-water tank being arranged on the preheating return pipe 550, and the sweet-water tank 550 is between the delivery pump 542 and the outlet of fuel heat exchangers 520.In demineralized water delivery pump The sweet-water tank 550 of voltage stabilizing moisturizing is set before 542, to ensure that 542 safe operation of demineralized water delivery pump is not cavitated.And, described Fuel recycle pre-heating system 500 is not coupled with the former steam-water circulation system of steam turbine acting, is independent of each other, it is to avoid reduce The superheated steam amount for entering steam turbine avoids fuel from leaking into steam turbine presence so as to reduce steam cycle efficiency, also Risk of explosion.Additionally, the fuel recycle pre-heating system 500 also includes that the flow being arranged on the preheating water inlet pipe 530 is adjusted Section valve 532, the flow control valve 532 are located between 520 import of the fuel heat exchangers and the outlet of afterheat heat exchanger 510.Logical Setting flow control valve 532 is crossed, the hot water amount in incoming fuel heat exchanger 520 can be adjusted, to adjust the heat exchange temperature to fuel Degree.
And, entirely combined-cycle power plant's soda pop backheat and the integrated effect system that carries of fuel heating are by entering combustion gas Fuel temperature before turbine carries out feedback control:When fuel temperature exceeded gas turbine stably burn permission temperature when, The desalination Water flow adjusting valve 532 of the fuel recycle pre-heating system 500 is turned down, and reduces the heat exchange amount of fuel heat exchangers 520, 510 heat exchange amount of flue gas heat-exchange unit in the afterbody residual heat flue 410 of corresponding waste heat boiler 400 is also reduced, it is desirable to through herein Flue-gas temperature reduce, also require the condensing water temperature for being lowered into waste heat boiler 400, for the vapor wheel of heat-setting water The 710 cylinder amount of drawing gas of machine then automatically adjusts minimizing by drain valve 750, and the chimney 600 being now connected with waste heat boiler 400 is discharged fume temperature Degree still keeps reduced levels, so as to improve steam cycle efficiency;When fuel temperature is not enough to maintain gas turbine stably to burn, Or needing to improve fuel temperature to improve during gas turbine mechanical efficiency, desalination Water flow adjusting valve 532 is opened greatly, changes fuel The heat exchange amount increase of hot device 520,510 heat exchange amount of flue gas heat-exchange unit in the afterbody residual heat flue 410 of corresponding waste heat boiler 400 Also increase, it is desirable to raise through flue-gas temperature herein, also require to raise the condensing water temperature for entering waste heat boiler 400, use Increase is automatically adjusted by drain valve 750 then in the 710 cylinder amount of drawing gas of steam turbine of heat-setting water, now with waste heat boiler 600 exhaust gas temperature of chimney of 400 connections still keeps reduced levels, now fuel-side air-water heat exchanger heat exchange amount, waste heat boiler Air-water heat exchanger heat exchange amount, heat regenerative system condensate vapor-water heat exchanger heat exchange amount and steam turbine cylinder draw gas drain valve, Contrary with the first situation aforementioned.By arranging soda pop heat regenerative system, condensing water temperature is improved, so as to pass through to adjust waste heat boiler Interior flue-gas temperature and the desalination coolant-temperature gage between gas turbine, adjust fuel temperature, make the fuel before entrance gas turbine Obtain higher temperature.I.e. by arranging soda pop heat regenerative system and fuel recycle pre-heating system, adjust and enter in waste heat boiler Condensing water temperature, so as to pass through to adjust the flue-gas temperature in waste heat boiler and the desalination coolant-temperature gage between gas turbine, is adjusted Fuel temperature, makes the fuel before entrance gas turbine obtain higher temperature.
Additionally, the soda pop Recuperative heat exchanger, afterheat heat exchanger, fuel heat exchangers are disposed as board-like or pipe type heat transfer Device.Such heat exchanger structure is simple, low cost.And, all heat exchangers in system as soda pop Recuperative heat exchanger, more than Heat exchanger, fuel heat exchangers, are the heat exchanger of low-pressure grade, simple system, and operational reliability is high, system cost compared with Low.
Combined-cycle power plant's soda pop backheat of the present invention and fuel heating integrated put forward effect system, combustion and steam can be improved The efficiency of integrated combination cycle, energy-saving, economic benefit and social benefit is significantly increased.By arranging the soda pop of steam/water circulating Heat regenerative system, so as to improve the average endothermic temperature of thermodynamic cycle, while improve steam cycle efficiency, makes entrance combustion gas The fuel of turbine can obtain higher temperature;By arranging afterheat heat exchanger in waste heat boiler afterbody, it is to avoid follow from former soda pop The high temperature saturation water that can produce superheated steam is extracted in loop systems, on the efficiency basis for improving combustion gas circulation ensures original vapour Water circulation system can produce enough superheated steam amounts to enter steam turbine, so as to be integrally improved Combined cycle gas-steam turbine The thermal efficiency;The mutual not coupled interference of the steam-water circulation system of the fuel system of gas turbine and steam turbine, even if fuel leakage Will not also enter in the steam circulation of steam turbine, safe and reliable to operation;By the afterheat heat exchanger of waste heat boiler afterbody and Desalination aqueous medium between gas turbine fuel system forms closed cycle, without loss of steam and water, saves water and energy;System applicable working condition model Enclose extensively, can run in any operating mode;Meet country-driven depth energy saving policy, can make power plant investment and operator compared with Energy conservation object is easily realized, more competitive in electricity market and vitality.
Each technical characteristic of embodiment described above arbitrarily can be combined, for making description succinct, not to above-mentioned reality Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously Therefore can not be construed as limiting the scope of the patent.It should be pointed out that for one of ordinary skill in the art Say, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the protection of the present invention Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.

Claims (10)

1. a kind of combined-cycle power plant's soda pop backheat and fuel heating integrated put forward effect system, it is characterised in that including combustion engine unit, The admission line being connected with the combustion engine unit and feed pipe, the waste heat boiler being connected with the combustion engine machine set outlet, with institute The chimney of waste heat boiler connection, and the steam unit being connected with the waste heat boiler is stated, connects the feed pipe and waste heat The fuel recycle pre-heating system of boiler;
The steam unit includes the steam turbine being connected with described waste heat boiler one end, is connected with described steam turbine one end Steam-driven generator, the condenser being connected with the steam turbine other end, the condensate pump being connected with the condenser, and described Condensate pump is connected with the waste heat boiler, and connects the soda pop backheat system of the steam turbine, condenser and waste heat boiler System;
The soda pop heat regenerative system includes the soda pop Recuperative heat exchanger being connected between the steam turbine and condenser, while institute State soda pop Recuperative heat exchanger to be also attached between the condensate pump and the waste heat boiler other end.
2. combined-cycle power plant's soda pop backheat according to claim 1 and fuel heating integrated put forward effect system, its feature exists Include the residual heat flue that one end is connected with the combustion engine unit in, the waste heat boiler, the residual heat flue other end with described Chimney connects;
And the flue gas heat-exchange unit being arranged in the residual heat flue, the flue gas heat-exchange unit includes condensate water inlet and steam Venthole, the Vapor outlet are connected with the steam turbine, the condensate water inlet and the soda pop Recuperative heat exchanger Connection.
3. combined-cycle power plant's soda pop backheat according to claim 1 and 2 and fuel heating integrated put forward effect system, its feature It is, the steam turbine includes that middle cylinder or steam, and the extraction opening being arranged in the middle cylinder or steam, the soda pop backheat are changed Hot device is connected with the extraction opening.
4. combined-cycle power plant's soda pop backheat according to claim 3 and fuel heating integrated put forward effect system, its feature exists In the soda pop heat regenerative system also includes the drain valve being arranged between the soda pop Recuperative heat exchanger and condenser.
5. combined-cycle power plant's soda pop backheat according to claim 2 and fuel heating integrated put forward effect system, its feature exists In the fuel recycle pre-heating system includes the afterheat heat exchanger for being arranged at the residual heat flue afterbody, is arranged at the charging Fuel heat exchangers on pipeline, connect the preheating water inlet pipe of the afterheat heat exchanger outlet and fuel heat exchangers import, connect institute State the preheating return pipe of fuel heat exchangers outlet and afterheat heat exchanger import, and the conveying being connected on the preheating return pipe Pump.
6. combined-cycle power plant's soda pop backheat according to claim 5 and fuel heating integrated put forward effect system, its feature exists In the fuel recycle pre-heating system also includes the sweet-water tank being arranged on the preheating return pipe, and the sweet-water tank It is located between the delivery pump and fuel heat exchangers outlet.
7. combined-cycle power plant's soda pop backheat according to claim 5 and fuel heating integrated put forward effect system, its feature exists In the fuel recycle pre-heating system also includes the flow control valve being arranged on the preheating water inlet pipe, the Flow-rate adjustment Valve is located between the fuel heat exchangers import and afterheat heat exchanger outlet.
8. combined-cycle power plant's soda pop backheat according to claim 5 and fuel heating integrated put forward effect system, its feature exists In the soda pop Recuperative heat exchanger, afterheat heat exchanger, fuel heat exchangers are disposed as low-pressure performance heater.
9. combined-cycle power plant's soda pop backheat according to claim 5 and fuel heating integrated put forward effect system, its feature exists In the soda pop Recuperative heat exchanger, afterheat heat exchanger, fuel heat exchangers are disposed as board-like or pipe heat exchanger.
10. combined-cycle power plant's soda pop backheat according to claim 1 and fuel heating integrated put forward effect system, its feature exists The turbine that includes connecting in, the combustion engine unit, combustor, compressor, and the fuel gas generation being connected with the compressor Machine, and the admission line is connected with the compressor, the feed pipe is connected with the combustor, the turbine and institute State waste heat boiler connection.
CN201611180061.6A 2016-12-19 2016-12-19 Combined-cycle power plant's soda pop backheat and fuel heating integrated put forward effect system Pending CN106499455A (en)

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CN109442436A (en) * 2018-10-16 2019-03-08 常熟重型机械制造有限公司 A kind of low heat value organic waste liquid burning processing system and method
CN110382842A (en) * 2017-04-10 2019-10-25 三菱日立电力系统株式会社 The control method of Gas Turbine Combined-cycle equipment and Gas Turbine Combined-cycle equipment
CN112126469A (en) * 2020-08-24 2020-12-25 成都聚实节能科技有限公司 IGCC combined cycle power generation method for co-producing fuel oil and natural gas

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CN110382842A (en) * 2017-04-10 2019-10-25 三菱日立电力系统株式会社 The control method of Gas Turbine Combined-cycle equipment and Gas Turbine Combined-cycle equipment
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CN112126469A (en) * 2020-08-24 2020-12-25 成都聚实节能科技有限公司 IGCC combined cycle power generation method for co-producing fuel oil and natural gas

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