CN105443243A - Gas-steam combined circulation system - Google Patents
Gas-steam combined circulation system Download PDFInfo
- Publication number
- CN105443243A CN105443243A CN201510993548.5A CN201510993548A CN105443243A CN 105443243 A CN105443243 A CN 105443243A CN 201510993548 A CN201510993548 A CN 201510993548A CN 105443243 A CN105443243 A CN 105443243A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- exchange unit
- heat
- gas
- heat boiler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007789 gas Substances 0.000 claims abstract description 48
- 239000000446 fuel Substances 0.000 claims abstract description 40
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 174
- 239000003546 flue gas Substances 0.000 claims description 174
- 238000010304 firing Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000009833 condensation Methods 0.000 claims description 11
- 230000005494 condensation Effects 0.000 claims description 10
- 239000000779 smoke Substances 0.000 abstract description 13
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 239000002918 waste heat Substances 0.000 abstract description 7
- 230000001276 controlling effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000003517 fume Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- 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
- F01K23/101—Regulating means specially adapted therefor
-
- 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
- F02C7/00—Features, 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
- F02C7/08—Heating air supply before combustion, e.g. by exhaust gases
-
- 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
- F02C7/00—Features, 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
- F02C7/22—Fuel supply systems
- F02C7/224—Heating fuel before feeding to the burner
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a gas-steam combined circulation system. The gas-steam combined circulation system comprises a gas turbine-generator set, a steam turbine-generator set, and a first smoke heat exchanger, wherein the gas turbine-generator set comprises a gas compressor, a combustion chamber and a turbine which are sequentially communicated; the steam turbine-generator set comprises a waste heat boiler; the waste heat boiler is communicated with the turbine; the waste heat boiler is communicated with an intake end of the first smoke heat exchanger; an exhaust end of the first smoke heat exchanger is communicated with the waste heat boiler; high-temperature smoke flowing out from the waste heat boiler enters the first smoke heat exchanger through the intake end of the first smoke heat exchanger, low-temperature smoke obtained after heat exchange with a cold fuel passing through the first smoke heat exchanger can flow in the waste heat boiler from the exhaust end of the first smoke heat exchanger, and a hot fuel obtained after heat exchange with the high-temperature smoke enters the combustion chamber. The efficiency of the gas-steam combined circulation system provided by the invention can be greatly increased.
Description
Technical field
The present invention relates to technical field of power generation, particularly relate to a kind of Combined cycle gas-steam turbine system.
Background technique
Due to Gas Turbine Generating Units have that efficiency is high, cost is low, environmental friendliness, occupation of land less and regulate and control the advantages such as flexible, Combined cycle gas-steam turbine system or be that the Poly-generation engineering of main frame has become countries in the world for realizing the generation technology of energy-saving and emission-reduction and develop actively with Gas Turbine Generating Units.
Wherein, Gas Turbine Generating Units forms primarily of four parts, comprises gas compressor, firing chamber, turbine and generator.Its working principle is, air is inhaled into the gas compressor of gas handling system, and arranged into firing chamber after compression boosting, simultaneously, fuel also enters firing chamber, and air and fuel mix burning, promote turbine acting in a combustion chamber, portion of energy is delivered to gas compressor can pressurized air, and remaining part energy transferring is to electrical power generators.
Steam turbine generator set then forms primarily of steam turbine, generator and vapour condenser.Its working principle is, high temperature and high pressure steam enters steam turbine acting, and its energy transferring is to electrical power generators, and steam rear formation exhaust steam of having done work enters vapour condenser, becomes water of condensation by circulating cooling water cooling exhaust steam.
Combined cycle gas-steam turbine system, the fuel that mixing air and fuel also pass through burning certain parameter in Gas Turbine Generating Units, the flue gas acting generating produced, its smoke evacuation is brought remaining heat in exhaust heat boiler heat medium water and is become steam, high parameter steam enters steam turbine acting generating or heat supply, in vapour condenser, be recycled water quench after steam acting, steam-condensation becomes water of condensation to reenter exhaust heat boiler increasing temperature and pressure to become steam, forms steam thermodynamic cycle.
How to improve the efficiency of Combined cycle gas-steam turbine system, reduce the emphasis of the loss Shi Ge combined-cycle power plant research of fuel, realize mainly through two kinds of modes at present:
First, saturation water is pressed to heat the fuel entering Gas Turbine Generating Units in the high temperature of being drawn by exhaust heat boiler, thus improve Gas Turbine Generating Units mechanical efficiency and stability, but this technological scheme needs to utilize in the high temperature of high-grade heat in vapor recycle presses saturation water, make at raising fuel temperature simultaneously, decrease the steam flow produced at exhaust heat boiler, reduce steam cycle efficiency, thus reduce the lifting effect of Combined cycle gas-steam turbine system effectiveness;
Second, at exhaust heat boiler back-end ductwork, vapor-water heat exchanger is set, demineralized water is entered after being boosted by pump in exhaust heat boiler vapor-water heat exchanger, heat exchange is carried out in smoke evacuation after doing work with Gas Turbine Generating Units, utilizing demineralized water to be delivered to by the waste heat of exhaust heat boiler as intermediate medium enters in the air of Gas Turbine Generating Units, now exhaust heat boiler tail flue gas and demineralized water carry out a heat exchange, and demineralized water and air carry out secondary heat exchange, then the utilization ratio of heat exchange efficiency and fume afterheat reduces greatly; In addition, this technological scheme needs in exhaust heat boiler, additionally arrange flue gas heat-exchange unit and booster pump equipment, equipment investment is more, too increases flue gas resistance and the gas turbine back pressure of exhaust heat boiler inside, also just reduces exerting oneself and efficiency of Gas Turbine Generating Units; Meanwhile, this technological scheme uses the rotary machines such as booster pump, and Maintenance and Repair workload is at ordinary times comparatively large, and booster pump needs when unit normally runs to consume station-service electric energy, and the amplitude that Combined cycle gas-steam turbine efficiency is improved is not obvious.
Above, to reach the effect of the efficiency improving Combined cycle gas-steam turbine system all not obvious for two schemes.
Summary of the invention
Based on this, be necessary that the problem for how significantly improving the efficiency of Combined cycle gas-steam turbine system provides a kind of Combined cycle gas-steam turbine system.
A kind of Combined cycle gas-steam turbine system, comprise Gas Turbine Generating Units and steam turbine generator set, described Combined cycle gas-steam turbine system also comprises the first flue gas heat-exchange unit, described Gas Turbine Generating Units comprises the gas compressor be communicated with successively, firing chamber and turbine, described steam turbine generator set comprises exhaust heat boiler, described exhaust heat boiler is communicated with described turbine, the done work flue gas of discharge of described turbine can enter described exhaust heat boiler, described exhaust heat boiler is communicated with the inlet end of described first flue gas heat-exchange unit, the outlet side of described first flue gas heat-exchange unit is communicated with described exhaust heat boiler, from the high-temperature flue gas that described exhaust heat boiler flows out, inlet end through described first flue gas heat-exchange unit enters described first flue gas heat-exchange unit, described exhaust heat boiler can be flow to from the outlet side of described first flue gas heat-exchange unit with the low-temperature flue gas obtained after the cold fuel heat exchange of described first flue gas heat-exchange unit, described firing chamber is entered with the hot fuel obtained after described high-temperature flue gas heat exchange.
Combined cycle gas-steam turbine system provided by the invention, first flue gas heat-exchange unit is connected with exhaust heat boiler, high-temperature flue gas becomes low-temperature flue gas and again enters in exhaust heat boiler and reuse after the first flue gas heat-exchange unit, from the first flue gas heat-exchange unit through cold fuel the first flue gas heat-exchange unit, become hot fuel after heat exchange, enter combustion chambers burn, the high-temperature flue gas of exhaust heat boiler is directly utilized, do not need intermediate heat transfer medium, used heat in exhaust heat boiler can be utilized by high efficiency, reduces the waste of exhaust heat boiler energy; And the flue gas in exhaust heat boiler is utilized in process and does not need intermediate equipment to keep on the go, reduce the input amount of equipment, reduce the power consumption of Combined cycle gas-steam turbine system, significantly can improve the efficiency of Combined cycle gas-steam turbine system.
Wherein in an embodiment, described Combined cycle gas-steam turbine system also comprises the second flue gas heat-exchange unit, the inlet end of described second flue gas heat-exchange unit is communicated with the outlet side of described first flue gas heat-exchange unit, the outlet side of described second flue gas heat-exchange unit is communicated with described exhaust heat boiler, described low-temperature flue gas can enter described second flue gas heat-exchange unit and the cool air heat exchange entering described second flue gas heat-exchange unit, the hot air obtained after described cool air heat exchange enters described gas compressor, and the comparatively low-temperature flue gas obtained after described low-temperature flue gas heat exchange enters described exhaust heat boiler.
Wherein in an embodiment, the outlet side of described first flue gas heat-exchange unit is communicated with the outlet side of described second flue gas heat-exchange unit, and described low-temperature flue gas and described comparatively low-temperature flue gas converge and enter described exhaust heat boiler.
Wherein in an embodiment, the first pipeline is provided with between the outlet side of described first flue gas heat-exchange unit and described exhaust heat boiler, described first pipeline comprises the first lateral and the second lateral, one end of described first lateral is communicated with described exhaust heat boiler, one end of described second lateral is communicated with described second flue gas heat-exchange unit, and described first lateral is provided with first flow control valve.
Wherein in an embodiment, be provided with second pipe between described first flue gas heat-exchange unit and described firing chamber, described hot fuel flows to described firing chamber through described second pipe, described second pipe is provided with the first temperature point.
Wherein in an embodiment, described second lateral is provided with second control valve.
Wherein in an embodiment, be provided with the 3rd pipeline between described second flue gas heat-exchange unit and described gas compressor, described hot air enters described gas compressor through described 3rd pipeline, and described 3rd pipeline is provided with the second temperature point.
Wherein in an embodiment, between the outlet side of described second flue gas heat-exchange unit and described exhaust heat boiler, be provided with the 4th pipeline, described 4th pipeline is provided with flue gas shut-off valve.
Wherein in an embodiment, the inlet end of described first flue gas heat-exchange unit is communicated with the low pressure evaporator of described exhaust heat boiler.
Wherein in an embodiment, the outlet side of described first flue gas heat-exchange unit is communicated with the condensation water heater of described exhaust heat boiler.
Accompanying drawing explanation
The schematic flow sheet of the Combined cycle gas-steam turbine system that Fig. 1 provides for the embodiment of the present invention.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Preferred embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present invention more comprehensively thorough.
See Fig. 1, the embodiment of the present invention provides a kind of Combined cycle gas-steam turbine system, comprise Gas Turbine Generating Units 10 and steam turbine generator set 20, Combined cycle gas-steam turbine system also comprises the first flue gas heat-exchange unit 30, Gas Turbine Generating Units 10 comprises the gas compressor 11 be communicated with successively, firing chamber 12 and turbine 13, steam turbine generator set 20 comprises exhaust heat boiler 21, exhaust heat boiler 21 is communicated with turbine 13, the done work flue gas of discharge of turbine 13 can enter exhaust heat boiler 21, exhaust heat boiler 21 is communicated with the inlet end of the first flue gas heat-exchange unit 30, the outlet side of the first flue gas heat-exchange unit 30 is communicated with exhaust heat boiler 21, from the high-temperature flue gas a1 that exhaust heat boiler 21 flows out, inlet end through the first flue gas heat-exchange unit 30 enters the first flue gas heat-exchange unit 30, exhaust heat boiler 21 can be flow to from the outlet side of the first flue gas heat-exchange unit 30 with the low-temperature flue gas a2 obtained after the cold fuel b1 heat exchange of the first flue gas heat-exchange unit 30, firing chamber 12 is entered with the hot fuel b2 obtained after high-temperature flue gas a1 heat exchange.
The Combined cycle gas-steam turbine system that the embodiment of the present invention provides, the done work flue gas d of discharge of Gas Turbine Generating Units 10 enters exhaust heat boiler 21, first flue gas heat-exchange unit 30 is communicated with exhaust heat boiler 21, high-temperature flue gas a1 becomes low-temperature flue gas a2 and again enters exhaust heat boiler 21 li recycling after the first flue gas heat-exchange unit 30, from the first flue gas heat-exchange unit 30 through cold fuel b1 the first flue gas heat-exchange unit 30, become hot fuel b2 after heat exchange, enter firing chamber 12 to burn, the high-temperature flue gas a1 of exhaust heat boiler 21 is directly utilized, do not need intermediate heat transfer medium, without loss of steam and water, and the used heat of exhaust heat boiler 21 li can be utilized by high efficiency, reduce the waste of exhaust heat boiler 21 energy, and the high-temperature flue gas a1 in exhaust heat boiler 21 is utilized in process and does not need intermediate equipment to keep on the go, reduce the input amount of equipment, reduce the power consumption of Combined cycle gas-steam turbine system, significantly can improve the efficiency of Combined cycle gas-steam turbine system.
The temperature of cold fuel b1 is heated in above-mentioned setting only, but what help fuel combustion in firing chamber 12 also has air, therefore in order to the combustion utilization efficiency of increasing fuel in firing chamber 12, in the present embodiment, Combined cycle gas-steam turbine system also can be set and also comprise the second flue gas heat-exchange unit 40, the inlet end of the second flue gas heat-exchange unit 40 is communicated with the outlet side of the first flue gas heat-exchange unit 30, the outlet side of the second flue gas heat-exchange unit 40 is communicated with exhaust heat boiler 21, low-temperature flue gas a2 can enter the second flue gas heat-exchange unit 40 and the cool air c1 heat exchange entering the second flue gas heat-exchange unit 40, the hot air c2 obtained after cool air c1 heat exchange enters gas compressor 11, the comparatively low-temperature flue gas a3 obtained after low-temperature flue gas a2 heat exchange enters exhaust heat boiler 21.Setting like this, at high-temperature flue gas a1 after the first flue gas heat-exchange unit 30 becomes low-temperature flue gas a2, part low-temperature flue gas a2 can flow in the second flue gas heat-exchange unit 40 with the cool air c1 heat exchange through the second flue gas heat-exchange unit 40, cool air c1 enters after gas compressor 11 is compressed and enters firing chamber 12 becoming hot air c2 after the second flue gas heat-exchange unit 40 heat exchange, burn in firing chamber 12 together with the hot fuel b2 entering firing chamber 12, improve the combustion efficiency of fuel in firing chamber 12, and make use of the high-temperature flue gas a1 of exhaust heat boiler 21 afterbody eliminating fully, reduce the temperature of exhaust fume of exhaust heat boiler 21, decrease the flue gas loss of exhaust heat boiler 21, improve exhaust heat boiler 21 heat exchange efficiency and steam production, thus further increase the working efficiency of the Combined cycle gas-steam turbine system that the embodiment of the present invention provides, simultaneously, the temperature of exhaust fume of exhaust heat boiler 21 reduces, thus be reduced to the thermo-pollution discharge of air, there is good social benefit.
In the present embodiment, the outlet side that can arrange the first flue gas heat-exchange unit 30 is communicated with the outlet side of the second flue gas heat-exchange unit 40, and low-temperature flue gas a2 and comparatively low-temperature flue gas a3 converge and enter exhaust heat boiler 21.Certainly, in other embodiments, the outlet side of the first flue gas heat-exchange unit 30 also can not be communicated with the outlet side of the second flue gas heat-exchange unit 40, thus from the outlet side of the first flue gas heat-exchange unit 30 low-temperature flue gas a2 out from from the second flue gas heat-exchange unit 40 flowing back to exhaust heat boiler 21 from different places respectively compared with low-temperature flue gas a3 out.
In the present embodiment, also can be provided with the first pipeline 50 between the outlet side of the first flue gas heat-exchange unit 30 and exhaust heat boiler 21, first pipeline 50 comprises the first lateral 51 and the second lateral 52, one end of first lateral 51 is connected with exhaust heat boiler 21, one end of second lateral 52 is connected with the second flue gas heat-exchange unit 40, and the first lateral 51 is provided with first flow control valve 60.Flow into the second flue gas heat-exchange unit 40 from an outlet side low-temperature flue gas a2 part out for the first flue gas heat-exchange unit 30 through the second lateral 52, another part flows back in exhaust heat boiler 21 through the first lateral 51.First flow control valve 60 is mainly used to the temperature of the hot fuel b2 of the firing chamber 12 controlling to enter Gas Turbine Generating Units 10, and balance enters the resistance of the low-temperature flue gas a2 in the second flue gas heat-exchange unit 40.High-temperature flue gas a1 extracts out from exhaust heat boiler 21, the flow of the high-temperature flue gas a1 by the second flue gas heat-exchange unit 30 is regulated by controlling first flow control valve 60 aperture size, thus regulate and the heat exchange amount of cold fuel b1, its feedback signal is from the temperature of the hot fuel b2 before the firing chamber 12 entering Gas Turbine Generating Units 10.
Further, the temperature of the hot fuel b2 before the firing chamber 12 of Gas Turbine Generating Units 10 is entered for the ease of feedback, second pipe 70 can be provided with between the first flue gas heat-exchange unit 30 and firing chamber 12, hot fuel b2, through second pipe 70 flow into combustor 12, second pipe 70 is provided with the first temperature point.When the temperature that the first temperature point records is higher than setting value, then turn down first flow control valve 60, otherwise, when the temperature that the first temperature point records is lower than setting value, then open large first flow control valve 60.
Further, see Fig. 1, for the ease of controlling the flow of the low-temperature flue gas a2 in inflow second flue gas heat-exchange unit 40, second control valve 80 can be provided with on the second lateral 52.The temperature that second control valve 80 can control to enter the hot air c2 of the gas compressor 11 of Gas Turbine Generating Units 10 is set.
And be provided with between the outlet side and exhaust heat boiler 21 of the second flue gas heat-exchange unit 40 on the 4th pipeline the 100, four pipeline 100 and be provided with flue gas shut-off valve 110.Particularly, the 4th pipeline 100 is communicated with the first lateral 51 and is intersected in the 5th pipeline 120, is communicated with exhaust heat boiler 21 by the 5th pipeline 120.
When Combined cycle gas-steam turbine system is at part load in order to improve the efficiency of Combined cycle gas-steam turbine system, the temperature being entered the cool air c1 of Gas Turbine Generating Units 10 by heating is just needed to realize, now open second control valve 80 and flue gas shut-off valve 110, then part is entered the second flue gas heat-exchange unit 40 heating cold air c1 by the low-temperature flue gas a2 that cold fuel b1 cools.The control signal of second control valve 80 is from the temperature of hot air c2 of gas compressor 11 entering Gas Turbine Generating Units 10, when the temperature of hot air c2 is higher than setting value, then turn down second control valve 80, otherwise, when the temperature of hot air c2 is lower than setting value, then open large second control valve 80.When air does not need heating, then second control valve 80 and flue gas shut-off valve 110 are closed simultaneously.In order to detect the temperature of hot air c2, can be provided with the 3rd pipeline 90 between the second flue gas heat-exchange unit 40 and gas compressor 21, hot air c1 enters gas compressor 21 through the 3rd pipeline 90, and the 3rd pipeline 90 is provided with the second temperature point.
When second control valve 80 and flue gas shut-off valve 110 open put into operation time, the flue gas flowing through cold fuel b1 in the first flue gas heat-exchange unit 30 can reduce on a small quantity, now first flow control valve 60 synchronous micro-adjusting can be opened greatly, until the temperature of hot fuel b2 and the temperature of hot air c2 all reach setting value.
In the present embodiment, by the flexible control to first flow control valve 60, second control valve 80 and flue gas shut-off valve 110, can realize heating the high efficiency of cold fuel b1 and cool air c1 simultaneously.Flow back to the low-temperature flue gas a2 of exhaust heat boiler 21 or after comparatively low-temperature flue gas a3 is utilized, the chimney 211 finally by exhaust heat boiler 21 afterbody externally discharges.
The first above-mentioned flue gas heat-exchange unit 30 and the second flue gas heat-exchange unit 40 all can be low pressure heat exchanger, and system cost is low.
Particularly, exhaust heat boiler 21 comprises low pressure evaporator and condensation water heater, low pressure evaporator is the penultimate stage heat exchanger surface of exhaust heat boiler 21, condensation water heater is exhaust heat boiler 21 final stage flue gas heat exchange face, the inlet end of the first flue gas heat-exchange unit 30 is connected with the low pressure evaporator of exhaust heat boiler 21, and the outlet side of the first flue gas heat-exchange unit 30 is connected with the condensation water heater of exhaust heat boiler 21.Particularly, the outlet side of the second flue gas heat-exchange unit 40 is communicated in the 5th pipeline 120 by the 4th pipeline 100, the outlet side of the first flue gas heat-exchange unit 30 is communicated in the 5th pipeline 120 by the first lateral 51,5th pipeline 120 is communicated with the condensation water heater of exhaust heat boiler 21, thus the low-temperature flue gas a2 from the first flue gas heat-exchange unit 30 outflow and the comparatively low-temperature flue gas a3 from the second flue gas heat-exchange unit 40 outflow converges as mixed flue gas a4, mixed flue gas a4 flow to exhaust heat boiler 21 inside by the 5th pipeline 120 at the 5th pipeline 120.
The high-temperature flue gas a1 temperature about 190 DEG C of drawing in the middle of exhaust heat boiler 21 penultimate stage heat exchanger surface (low pressure evaporator), be supplied to the first flue gas heat-exchange unit 30 cold fuel b1 is heated, about 100 DEG C are down to by the flue gas that cold fuel b1 cools, when the second flue gas heat-exchange unit 40 does not come into operation, namely second control valve 80 and flue gas shut-off valve 110 are closed, by the target set point regulating first flow control valve 60 to make hot fuel b2 temperature reach 180 DEG C.Enter Gas Turbine Generating Units 10 after cold fuel b1 is heated to do work, mechanical efficiency improves combustion stability while promoting, thus improves the efficiency of Combined cycle gas-steam turbine system.
When ambient temperature is lower, Combined cycle gas-steam turbine system power load reduces, then flue gas shut-off valve 110 can be fully opened, second control valve 80 reaches part aperture, now make hot fuel b2 temperature stabilization at target set point by controlling first flow control valve 60, open large second control valve 80 gradually, make hot air c2 temperature stabilization target set point scope 55 ~ 60 DEG C, smoke evacuation d temperature after now Gas Turbine Generating Units 10 acting raises, the steam flow that exhaust heat boiler 21 produces increases, enter the steam flow also just increase that steam turbine generator set 20 does work, therefore the effect of the first flue gas heat-exchange unit 30 and the second flue gas heat-exchange unit 30 is passed through, Combined cycle gas-steam turbine system effectiveness increases substantially.
Cooled low-temperature flue gas a2 finally drains back in the middle of exhaust heat boiler 21 condensation water heater with the mixed flue gas a4 formed compared with low-temperature flue gas a3.
The Gas Turbine Generating Units 10 of the Combined cycle gas-steam turbine system that the embodiment of the present invention provides also comprises the first generator 14, steam turbine generator set 20 also comprises the second generator 22, steam turbine 23 and vapour condenser 24, enter steam turbine 23 from the high temperature and high pressure steam e1 of exhaust heat boiler 21 outflow to do work, its energy transferring to the second generator 22, exhaust steam e3 after steam turbine 23 does work enters vapour condenser 24, by flowing to the effect of the condensed water f1 of vapour condenser 24, the condensed water of condensation e2 of exhaust steam e3 enters in exhaust heat boiler 21 again, the condensed water f2 flowed out from vapour condenser 24 discharges recycling.
The above embodiment only have expressed several mode of execution of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a Combined cycle gas-steam turbine system, comprise Gas Turbine Generating Units and steam turbine generator set, it is characterized in that, described Combined cycle gas-steam turbine system also comprises the first flue gas heat-exchange unit, described Gas Turbine Generating Units comprises the gas compressor be communicated with successively, firing chamber and turbine, described steam turbine generator set comprises exhaust heat boiler, described exhaust heat boiler is communicated with described turbine, the done work flue gas of discharge of described turbine can enter described exhaust heat boiler, described exhaust heat boiler is communicated with the inlet end of described first flue gas heat-exchange unit, the outlet side of described first flue gas heat-exchange unit is communicated with described exhaust heat boiler, from the high-temperature flue gas that described exhaust heat boiler flows out, inlet end through described first flue gas heat-exchange unit enters described first flue gas heat-exchange unit, described exhaust heat boiler can be flow to from the outlet side of described first flue gas heat-exchange unit with the low-temperature flue gas obtained after the cold fuel heat exchange of described first flue gas heat-exchange unit, described firing chamber is entered with the hot fuel obtained after described high-temperature flue gas heat exchange.
2. Combined cycle gas-steam turbine system according to claim 1, it is characterized in that, described Combined cycle gas-steam turbine system also comprises the second flue gas heat-exchange unit, the inlet end of described second flue gas heat-exchange unit is communicated with the outlet side of described first flue gas heat-exchange unit, the outlet side of described second flue gas heat-exchange unit is communicated with described exhaust heat boiler, described low-temperature flue gas can enter described second flue gas heat-exchange unit and the cool air heat exchange entering described second flue gas heat-exchange unit, the hot air obtained after described cool air heat exchange enters described gas compressor, the comparatively low-temperature flue gas obtained after described low-temperature flue gas heat exchange enters described exhaust heat boiler.
3. Combined cycle gas-steam turbine system according to claim 2, it is characterized in that, the outlet side of described first flue gas heat-exchange unit is communicated with the outlet side of described second flue gas heat-exchange unit, and described low-temperature flue gas and described comparatively low-temperature flue gas converge and enter described exhaust heat boiler.
4. Combined cycle gas-steam turbine system according to claim 3, it is characterized in that, the first pipeline is provided with between the outlet side of described first flue gas heat-exchange unit and described exhaust heat boiler, described first pipeline comprises the first lateral and the second lateral, one end of described first lateral is communicated with described exhaust heat boiler, one end of described second lateral is communicated with described second flue gas heat-exchange unit, and described first lateral is provided with first flow control valve.
5. Combined cycle gas-steam turbine system according to claim 4, it is characterized in that, be provided with second pipe between described first flue gas heat-exchange unit and described firing chamber, described hot fuel flows to described firing chamber through described second pipe, described second pipe is provided with the first temperature point.
6. Combined cycle gas-steam turbine system according to claim 4, is characterized in that, described second lateral is provided with second control valve.
7. Combined cycle gas-steam turbine system according to claim 4, it is characterized in that, be provided with the 3rd pipeline between described second flue gas heat-exchange unit and described gas compressor, described hot air enters described gas compressor through described 3rd pipeline, and described 3rd pipeline is provided with the second temperature point.
8. Combined cycle gas-steam turbine system according to claim 3, is characterized in that, is provided with the 4th pipeline between the outlet side of described second flue gas heat-exchange unit and described exhaust heat boiler, and described 4th pipeline is provided with flue gas shut-off valve.
9. the Combined cycle gas-steam turbine system according to any one of claim 1-8, is characterized in that, the inlet end of described first flue gas heat-exchange unit is communicated with the low pressure evaporator of described exhaust heat boiler.
10. the Combined cycle gas-steam turbine system according to any one of claim 1-8, is characterized in that, the outlet side of described first flue gas heat-exchange unit is communicated with the condensation water heater of described exhaust heat boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510993548.5A CN105443243A (en) | 2015-12-23 | 2015-12-23 | Gas-steam combined circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510993548.5A CN105443243A (en) | 2015-12-23 | 2015-12-23 | Gas-steam combined circulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105443243A true CN105443243A (en) | 2016-03-30 |
Family
ID=55553807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510993548.5A Pending CN105443243A (en) | 2015-12-23 | 2015-12-23 | Gas-steam combined circulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105443243A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868911A (en) * | 2018-01-12 | 2018-11-23 | 至玥腾风科技投资集团有限公司 | A kind of electricity generation system and its control method |
| CN109252961A (en) * | 2017-07-13 | 2019-01-22 | 通用电气公司 | Continuous pinking formula gas-turbine unit and its assemble method |
| CN110986067A (en) * | 2019-12-06 | 2020-04-10 | 上海电气燃气轮机有限公司 | Blow pipe system for combined cycle power plant boiler and operation method thereof |
| CN112361654A (en) * | 2020-10-28 | 2021-02-12 | 上海本家空调系统有限公司 | Heat pump driven by gas engine |
| CN113464278A (en) * | 2021-07-06 | 2021-10-01 | 华北电力大学 | System for improving gas turbine combined cycle combined heat and power supply peak regulation flexibility |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269626B1 (en) * | 2000-03-31 | 2001-08-07 | Duk M. Kim | Regenerative fuel heating system |
| CN1737351A (en) * | 2005-09-01 | 2006-02-22 | 西安交通大学 | System and method for improving efficiency of combined cycle electric power plant |
| CN101545404A (en) * | 2008-03-24 | 2009-09-30 | 通用电气公司 | A system for extending the turndown range of a turbomachine |
| CN201723313U (en) * | 2010-06-13 | 2011-01-26 | 中国科学院工程热物理研究所 | Gas turbine combined cycling device for distributed air and fuel humidification |
| CN103726932A (en) * | 2012-10-15 | 2014-04-16 | 通用电气公司 | System and method for heating fuel in a combined cycle gas turbine |
| CN203547925U (en) * | 2013-11-20 | 2014-04-16 | 中国神华能源股份有限公司 | Gas-steam combined cycle power plant |
| CN205206962U (en) * | 2015-12-23 | 2016-05-04 | 中国能源建设集团广东省电力设计研究院有限公司 | Gas and steam combined cycle system |
-
2015
- 2015-12-23 CN CN201510993548.5A patent/CN105443243A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269626B1 (en) * | 2000-03-31 | 2001-08-07 | Duk M. Kim | Regenerative fuel heating system |
| CN1737351A (en) * | 2005-09-01 | 2006-02-22 | 西安交通大学 | System and method for improving efficiency of combined cycle electric power plant |
| CN101545404A (en) * | 2008-03-24 | 2009-09-30 | 通用电气公司 | A system for extending the turndown range of a turbomachine |
| CN201723313U (en) * | 2010-06-13 | 2011-01-26 | 中国科学院工程热物理研究所 | Gas turbine combined cycling device for distributed air and fuel humidification |
| CN103726932A (en) * | 2012-10-15 | 2014-04-16 | 通用电气公司 | System and method for heating fuel in a combined cycle gas turbine |
| CN203547925U (en) * | 2013-11-20 | 2014-04-16 | 中国神华能源股份有限公司 | Gas-steam combined cycle power plant |
| CN205206962U (en) * | 2015-12-23 | 2016-05-04 | 中国能源建设集团广东省电力设计研究院有限公司 | Gas and steam combined cycle system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252961A (en) * | 2017-07-13 | 2019-01-22 | 通用电气公司 | Continuous pinking formula gas-turbine unit and its assemble method |
| CN109252961B (en) * | 2017-07-13 | 2021-11-05 | 通用电气公司 | Continuous detonation gas turbine engine and method of assembling same |
| CN108868911A (en) * | 2018-01-12 | 2018-11-23 | 至玥腾风科技投资集团有限公司 | A kind of electricity generation system and its control method |
| CN108868911B (en) * | 2018-01-12 | 2024-03-19 | 刘慕华 | Power generation system and control method thereof |
| CN110986067A (en) * | 2019-12-06 | 2020-04-10 | 上海电气燃气轮机有限公司 | Blow pipe system for combined cycle power plant boiler and operation method thereof |
| CN112361654A (en) * | 2020-10-28 | 2021-02-12 | 上海本家空调系统有限公司 | Heat pump driven by gas engine |
| CN113464278A (en) * | 2021-07-06 | 2021-10-01 | 华北电力大学 | System for improving gas turbine combined cycle combined heat and power supply peak regulation flexibility |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103234362B (en) | Device and process for generating power through efficient recovery of waste heat of sintered ores | |
| CN103244944B (en) | Air preheating system and method performing steam extraction by utilizing steam turbine | |
| CN104763485B (en) | A kind of concurrent heating type ultrahigh pressure/subcritical back pressure thermal power plant unit thermodynamic system | |
| CN206972383U (en) | A kind of heated by natural gas system for Combined cycle gas-steam turbine | |
| CN105443243A (en) | Gas-steam combined circulation system | |
| CN103234364B (en) | Device with griddle and process for generating power by efficiently recycling sinter waste heat | |
| CN106761982A (en) | A kind of new part backheating gas turbine combined cycle system | |
| CN106499455A (en) | Combined-cycle power plant's soda pop backheat and fuel heating integrated put forward effect system | |
| CN108119200A (en) | A kind of new bottom type back pressure heat supply steam turbine and its operation method | |
| CN107905897A (en) | Gas turbine cycle flue gas waste heat recovery and inlet gas cooling association system and method | |
| CN103967544A (en) | Waste heat utilization system of gas-steam combined cycle generator set | |
| CN203249228U (en) | Air pre-heating system extracting steam through steam turbine | |
| CN105698161B (en) | Coal fired power plant level-density parameter around First air is thermally integrated system | |
| CN205206962U (en) | Gas and steam combined cycle system | |
| CN203561221U (en) | Multi-functional waste heat utilization system | |
| CN104213951B (en) | Waste heat of coke oven is multigroup to utilize system | |
| CN105387729B (en) | Material cooling residual heat electricity generation system | |
| CN204002957U (en) | A kind of Waste Energy In Iron & Steel Enterprises comprehensive high-efficiency power generation system | |
| CN203756253U (en) | Low-temperature type organic Rankine cycle waste heat power generation system for steel plant | |
| CN105371267A (en) | Double-reheat steam turbine heat regenerative energy utilizing system for primary air and secondary air of heating boiler | |
| CN105464731A (en) | Gas-steam combined system and operation control method thereof | |
| CN109028999A (en) | Boiler circuit | |
| CN102278205A (en) | Combined cycle method capable of being used for distributed air and fuel humidified gas turbine | |
| CN104594964B (en) | A kind of novel single shaft gas theory thermal power plant unit system | |
| CN206683029U (en) | A kind of two-stage based on heat supply network progressive solution takes out solidifying heating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160330 |
|
| RJ01 | Rejection of invention patent application after publication |