CN110006026A - A kind of thermal power plant's depth peak regulation system - Google Patents

A kind of thermal power plant's depth peak regulation system Download PDF

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Publication number
CN110006026A
CN110006026A CN201910313766.8A CN201910313766A CN110006026A CN 110006026 A CN110006026 A CN 110006026A CN 201910313766 A CN201910313766 A CN 201910313766A CN 110006026 A CN110006026 A CN 110006026A
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steam
water
heat exchanger
pressure
low
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CN110006026B (en
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鹿院卫
魏海姣
张灿灿
吴玉庭
马重芳
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Beijing University of Technology
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Beijing University of Technology
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    • 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
    • F01K11/00Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • 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
    • F01K13/00General layout or general methods of operation of complete plants
    • F01K13/02Controlling, e.g. stopping or starting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00Control systems for steam boilers
    • 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
    • F22D1/00Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/50Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
    • 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22GSUPERHEATING OF STEAM
    • F22G7/00Steam superheaters characterised by location, arrangement, or disposition
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0034Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D20/00Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0034Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
    • F28D2020/0047Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material using molten salts or liquid metals
    • 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
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14Thermal energy storage

Abstract

The invention discloses a kind of thermal power plant's depth peak regulation systems, including superheater, reheater, high pressure cylinder, reheated steam electric control valve, main steam electric control valve, intermediate pressure cylinder, low pressure (LP) cylinder, condenser, condensate pump, low-pressure heating is to water- to-water heat exchanger, water supply pump group, oxygen-eliminating device, hyperbaric heating is to water- to-water heat exchanger, steam turbine low-pressure steam bleeding system, four sections of steam extractions, turbine high-pressure steam bleeding system, high-temperature molten salt is to water- to-water heat exchanger, high-temperature melting salt pump, salt storage tank, low-temperature molten salt storage tank, low-temperature molten salt pump, fused salt preheater, steam condensation type heat exchanger, the non-condensing type heat exchanger of steam and steam pressure-reducing device etc.;The present invention utilizes fused salt heat-storage technology, extra steam heat storage when by unit load down peak regulation, during unit load up peak regulation, extracted steam from turbine is reduced with high-temperature molten salt heating high-pressure feed water, increase steam turbine power output, improves generatine set heat efficiency, realize thermal power plant's flexibility depth peak regulation.

Description

A kind of thermal power plant's depth peak regulation system
Technical field
The present invention relates to a kind of thermal power plant's flexibility modification scheme, especially a kind of thermal power plant's depth peak regulation that can be realized A kind of thermal power plant's depth peak regulation system.
Background technique
Domestic electrical energy resource structure constantly adjusts, and renewable energy installed capacity is continuously increased, because between renewable energy Having a rest property and unstability cause a degree of hidden danger to electric power netting safe running, in order to increase consumption renewable energy, need to increase Add the flexibility of fired power generating unit, to guarantee the stabilization of power load.In addition, fired power generating unit single-machine capacity is continuously increased, lead to machine Group underload to high load setting increases, and is deteriorated adjusting peak-valley electric energy regulation performance.Especially during unit night peak regulation, Network load is less than boiler minimum steady and fires load, causes part energy waste, how to be to grind at present by the portion of energy use The key task studied carefully.
The invention proposes a kind of thermal power plant's depth peak regulation systems, increase fused salt heat accumulation on the basis of original thermal power plant and release The excess steam generated in unit running process is carried out heat storage by thermal, which terminates in peak load regulation, rises High-pressure feed water is heated in load process, reduces extraction flow of steam, can be improved unit operation efficiency again and be can increase unit adjusting Characteristic realizes efficiency of thermal power unit maximization.Therefore, the invention patent discloses a kind of thermal power plant's depth peak regulation system, full Heat demand when Zu Liao power plant depth peak regulation.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of thermal power plant's depth peak regulation systems will using fused salt heat-storage technology Extra steam heat storage when unit load down peak regulation heats high pressure with high-temperature molten salt during unit load up peak regulation Water supply reduces extracted steam from turbine, increases steam turbine power output, improves generatine set heat efficiency, realize thermal power plant's flexibility depth peak regulation.
The technical solution of the invention is as follows:
A kind of thermal power plant's depth peak regulation system, which is characterized in that including reheater 1, superheater 2, reheated steam electric adjustable Save valve 3, main steam electric control valve 4, high pressure turbine by steam control valve 5, high pressure cylinder 6, Main steam control valves 7, reheated steam control Valve 8 processed, intermediate pressure cylinder 9, low pressure (LP) cylinder 10, condenser 11, low voltage bypass steam control valve 12, condensate pump 13, low-pressure heating water supply Heat exchanger 14, water supply pump group 15, oxygen-eliminating device 16, hyperbaric heating are to water- to-water heat exchanger 17,18, four sections of steam turbine low-pressure steam bleeding system pumpings Vapour 19, turbine high-pressure steam bleeding system 20, high-temperature molten salt are to water- to-water heat exchanger 21, high-temperature melting salt pump 22, salt storage tank 23, low Temperature molten salt storage tank 24, low-temperature molten salt pump 25, fused salt preheater 26, steam condensation type heat exchanger 27, the non-condensing type heat exchanger of steam 28 and steam pressure-reducing device 29.
The boiler superheater 2 outlet is divided into three tunnels, is separately connected the main steam electric control valve 4, by the high pressure Road steam control valve 5 and the Main steam control valves 7;The main steam electric control valve 4 successively with the steam pressure-reducing device 29, non-condensing 28 vapour of type heat exchanger of the steam surveys connection;The Main steam control valves 7 connect 6 entrance of high pressure cylinder, described High pressure cylinder 6 outlet, non-condensing 28 vapour of type heat exchanger of the steam measure mouth, the high pressure turbine by steam control valve 5 export with 1 entrance of reheater is connected.
The outlet of reheater 1 is divided into three tunnels, is separately connected the reheated steam electric control valve 3, the reheated steam Control valve 8 and the low voltage bypass steam control valve 12;The reheated steam electric control valve 3 successively with the steam condensation type 27 vapour of heat exchanger is surveyed, 26 water side of the fused salt preheater is connected with the oxygen-eliminating device 16;The reheated steam control valve 8 connects institute State 9 entrance of intermediate pressure cylinder;Medium pressure cylinder 9 outlet successively with the low pressure (LP) cylinder 10, the condenser 11, the condensate pump 13, The low-pressure heating is connected to 14 water side of water- to-water heat exchanger, the oxygen-eliminating device 16;The low voltage bypass steam control valve 12 with it is described Condenser 11 is connected;The oxygen-eliminating device 16 is connected with the water supply pump group 15, and the outlet of water supply pump group 15 is divided into two-way difference It is connected to 17 water side entrance of water- to-water heat exchanger and the high-temperature molten salt to 21 water side entrance of water- to-water heat exchanger with the hyperbaric heating;It is described Hyperbaric heating is to 17 water side outlet of water- to-water heat exchanger and the high-temperature molten salt to 21 water side outlet of water- to-water heat exchanger and the boiler overheating 2 entrance of device is connected.
The outlet of low-temperature molten salt storage tank 24 connects the low-temperature molten salt pump 25, and 25 connection of low-temperature molten salt pump is described molten 26 salt side entrance of salt preheater, the 26 salt side outlet of fused salt preheater are divided into two-way and are separately connected the steam condensation type heat exchange 27 salt side entrance of device and the non-condensing 28 salt side entrance of type heat exchanger of steam;The 27 salt side outlet of steam condensation type heat exchanger and steaming The non-condensing 28 salt side outlet of type heat exchanger of vapour connects 23 entrance of salt storage tank, the outlet of salt storage tank 23 according to The secondary connection high-temperature melting salt pump 22, the high-temperature molten salt give water- to-water heat exchanger 21 salt side entrance, the high-temperature molten salt water supply heat exchange 21 salt side outlet of device connects 24 entrance of low-temperature molten salt storage tank.
The turbine high-pressure steam bleeding system 20 connects the hyperbaric heating and surveys entrance, the steamer to 17 vapour of water- to-water heat exchanger Four sections of steam extractions 19 of machine connect the oxygen-eliminating device 16, and the steam turbine low-pressure steam bleeding system 18 connects the low-pressure heating water supply heat exchange 14 vapour of device surveys entrance, and the hyperbaric heating measures mouth to 17 vapour of water- to-water heat exchanger and connects the oxygen-eliminating device 16, and the low-pressure heating is given 14 vapour of water- to-water heat exchanger measures mouth and connects the condenser 11.
By Main steam control valves 7, high pressure cylinder 6, reheater 1, reheated steam control valve 8, intermediate pressure cylinder 9, low pressure (LP) cylinder 10, condensing Device 11, condensate pump 13, low-pressure heating are to water- to-water heat exchanger 14, oxygen-eliminating device 16, water supply pump group 15, hyperbaric heating to water- to-water heat exchanger 17, superheater 2, turbine high-pressure steam bleeding system 20, four sections of steam extractions 19 of steam turbine and steam turbine low-pressure steam bleeding system 18 form Therrmodynamic system retains the former Turbo-generator Set method of operation.
Boiler superheater 2 generates steam, and steam successively passes through Main steam control valves 7, height by former power plant's method of operation all the way Cylinder pressure 6, reheater 1, reheated steam control valve 8, intermediate pressure cylinder 9, low pressure (LP) cylinder 10, condenser 11, condensate pump 13, low-pressure heating are given Water- to-water heat exchanger 14, oxygen-eliminating device 16, water supply pump group 15, hyperbaric heating enter boiler superheater 2 to water- to-water heat exchanger 17;Another way steam Successively steamed by main steam electric control valve 4, steam pressure-reducing device 29, the non-condensing type heat exchanger 28 of steam, reheater 1, reheating Vapour electric control valve 3, steam condensation type heat exchanger 27, fused salt preheater 26 enter oxygen-eliminating device 16;In low-temperature molten salt storage tank 24 Low-temperature molten salt successively passes through the non-condensing type heat exchange of low-temperature molten salt pump 25, fused salt preheater 26, steam condensation type heat exchanger 27, steam Device 28 enters salt storage tank 23;The above process is unit load down peak regulation heat accumulation process.
Whole steam that boiler superheater 2 generates successively pass through Main steam control valves 7, high pressure cylinder 6, reheater 1, reheating and steam Vapour control valve 8, intermediate pressure cylinder 9, low pressure (LP) cylinder 10, condenser 11, condensate pump 13, low-pressure heating to water- to-water heat exchanger 14, oxygen-eliminating device 16, Water supply pump group 15;Water supply pump group 15 exports water supply and is switched to high-temperature molten salt to water- to-water heat exchanger 21 to water- to-water heat exchanger 17 by hyperbaric heating Into boiler superheater 2;Turbine high-pressure steam bleeding system 20 and hyperbaric heating are connected to water- to-water heat exchanger 17 to be disconnected;Hyperbaric heating is given Water- to-water heat exchanger 17 connect disconnection with oxygen-eliminating device 16;High-temperature molten salt in salt storage tank 23 successively pass through high-temperature melting salt pump 22, High-temperature molten salt enters low-temperature molten salt storage tank 24 to water- to-water heat exchanger 21;The above process is unit load up peak regulation heat release process.
A kind of thermal power plant's depth peak regulation system, wherein include the following:
Timing under Turbo-generator Set responsive electricity grid load depth guarantees boiler maximum efficiency, and steam enters all the way Former turbine system acting, meets network load response;Boiler superheater 2 generates excess steam and successively changes in the non-condensing type of steam Hot device 28, steam condensation type heat exchanger 27, low-temperature molten salt and steam exchange heat in fused salt preheater 26, complete heat storage;
When Turbo-generator Set responsive electricity grid load fast upregulation, the steam that boiler superheater 2 generates fully enters steamer Machine acting;Hyperbaric heating is changed to high-temperature molten salt to 17 method of operation of water- to-water heat exchanger and runs to water- to-water heat exchanger 21, and cutting steam turbine is high It presses steam bleeding system 20 to run, improves unit capability of fast response;High-temperature molten salt and high-pressure feed water are in high-temperature molten salt to water- to-water heat exchanger It exchanges heat in 21, completes heat release;
A kind of thermal power plant's depth peak regulation system, wherein the non-condensing 28 vapour side outlet temperature of type heat exchanger of the steam and pressure Power is identical as the 6 steam drain temperature and pressure of steam turbine high-pressure cylinder respectively.
A kind of thermal power plant's depth peak regulation system, wherein the high-temperature molten salt uses quaternary mixed inorganic, fusing point It is 100 DEG C, molten state use temperature range is 150 DEG C -625 DEG C.
Compared with existing peak regulation technique, a kind of thermal power plant's depth peak regulation system of the present invention has following technological merit:
(1) fused salt heat-storage technology is utilized, boiler operating efficiency is maintained most preferably, improves the operation of Large-sized Coal-fired Power group Economy;
(2) the non-condensing type heat exchanger of steam is used, so that fused salt and steam is exchanged heat, steam is back to reheater, avoids Heated surface at the end of boiler overheating problem, has not been changed the original thermic load of boiler, ensure that boiler operatiopn caused by steam extraction amount increases Safety;
(3) utilization of heat reservoir reduces generating set load, and renewable energy network access amount can be made to increase, increased Power grid controllability.
Detailed description of the invention
Fig. 1 is that a kind of flow chart of thermal power plant's depth peak regulation system provided by the present invention is intended to;
Fig. 2 is the flow chart of unit load down peak regulation heat accumulation process of the invention;
Fig. 3 is the flow chart of unit load up peak regulation heat release process of the invention.
1: reheater 2: superheater 3: reheated steam electric control valve
4: main steam electric control valve 5: high pressure turbine by steam control valve 6: high pressure cylinder
7: Main steam control valves 8: reheated steam control valve 9: intermediate pressure cylinder
10: low pressure (LP) cylinder 11: condenser 12: low voltage bypass steam control valve
13: condensate pump 14: low-pressure heating is to water- to-water heat exchanger 15: water supply pump group
16: oxygen-eliminating device 17: hyperbaric heating is to water- to-water heat exchanger 18: steam turbine low-pressure steam bleeding system
19: four sections of steam extractions 20: turbine high-pressure steam bleeding system 21: high-temperature molten salt is to water- to-water heat exchanger
22: high-temperature melting salt pump 23: salt storage tank 24: low-temperature molten salt storage tank
25: low-temperature molten salt pump 26: fused salt preheater 27: steam condensation type heat exchanger
28: the non-condensing type heat exchanger 29 of steam: steam pressure-reducing device
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, this hair of Detailed description of the invention is now compareed Bright specific embodiment.
Please refer to Fig. 1, Fig. 2 and Fig. 3, a kind of preferable embodiment of thermal power plant's depth peak regulation system of the invention, tool Body component connection, is shown in Fig. 1, unit load down peak regulation heat accumulation process, operation schematic diagram is shown in Fig. 2, unit load up peak regulation heat release mistake Journey, operation schematic diagram are shown in Fig. 3.
A kind of thermal power plant's depth peak regulation system as described above, in preferred embodiment, unit load down peak regulation heat accumulation Process:
As shown in Fig. 2, timing under Turbo-generator Set responsive electricity grid load depth, the steam that boiler superheater 2 generates, one Road steam by former power plant's method of operation successively pass through Main steam control valves 7, high pressure cylinder 6, reheater 1, reheated steam control valve 8, Intermediate pressure cylinder 9, low pressure (LP) cylinder 10, condenser 11, condensate pump 13, low-pressure heating are to water- to-water heat exchanger 14, oxygen-eliminating device 16, water supply pump group 15, hyperbaric heating enters boiler superheater 2 to water- to-water heat exchanger 17;Another way steam successively passes through main steam electric control valve 4, steams The non-condensing type heat exchanger 28 of vapour decompressor 29, steam, reheater 1, reheated steam electric control valve 3, the heat exchange of steam condensation type Device 27, fused salt preheater 26 enter oxygen-eliminating device 16;Low-temperature molten salt in low-temperature molten salt storage tank 24 successively pass through low-temperature molten salt pump 25, The non-condensing type heat exchanger 28 of fused salt preheater 26, steam condensation type heat exchanger 27, steam enters salt storage tank 23, steam with Low-temperature molten salt completes heat exchange in the non-condensing type heat exchanger 28 of steam, steam condensation type heat exchanger 27, fused salt preheater 26 And it stores.
A kind of thermal power plant's depth peak regulation system as described above, in preferred embodiment, unit load up peak regulation heat release Process:
As shown in figure 3, timing on Turbo-generator Set responsive electricity grid load, whole steam that boiler superheater 2 generates according to It is secondary to pass through Main steam control valves 7, high pressure cylinder 6, reheater 1, reheated steam control valve 8, intermediate pressure cylinder 9, low pressure (LP) cylinder 10, condenser 11, condensate pump 13, low-pressure heating are to water- to-water heat exchanger 14, oxygen-eliminating device 16, water supply pump group 15;Water supply pump group 15 exports water supply by height Pressure heating is switched to high-temperature molten salt to water- to-water heat exchanger 17 and enters boiler superheater 2 to water- to-water heat exchanger 21;Turbine high-pressure steam extraction system System 20 and hyperbaric heating are connected to water- to-water heat exchanger 17 to be disconnected;Hyperbaric heating connect disconnection with oxygen-eliminating device 16 to water- to-water heat exchanger 17;It is high High-temperature molten salt in temperature molten salt storage tank 23 successively passes through high-temperature melting salt pump 22, high-temperature molten salt and enters low-temperature molten salt to water- to-water heat exchanger 21 Storage tank 24, high-temperature molten salt and high-pressure feed water, to exchanging heat in water- to-water heat exchanger 21, complete heat release in high-temperature molten salt.
The above is structure of the invention signal, principle and technological merit.The technical staff of the industry is not departing from this hair Made equivalent changes and modifications, should belong to the scope of protection of the invention under the premise of bright conceptions and principles.

Claims (9)

1. a kind of thermal power plant's depth peak regulation system, which is characterized in that electronic including reheater (1), superheater (2), reheated steam Regulating valve (3), main steam electric control valve (4), high pressure turbine by steam control valve (5), high pressure cylinder (6), Main steam control valves (7), reheated steam control valve (8), intermediate pressure cylinder (9), low pressure (LP) cylinder (10), condenser (11), low voltage bypass steam control valve (12), Condensate pump (13), low-pressure heating exchange heat to water- to-water heat exchanger (14), water supply pump group (15), oxygen-eliminating device (16), hyperbaric heating water supply Device (17), steam turbine low-pressure steam bleeding system (18), four sections of steam extractions (19), turbine high-pressure steam bleeding system (20), high-temperature molten salt are given Water- to-water heat exchanger (21), high-temperature melting salt pump (22), salt storage tank (23), low-temperature molten salt storage tank (24), low-temperature molten salt pump (25), Fused salt preheater (26), steam condensation type heat exchanger (27), the non-condensing type heat exchanger of steam (28) and steam pressure-reducing device (29);
The boiler superheater (2) outlet is divided into three tunnels, is separately connected the main steam electric control valve (4), by the high pressure Road steam control valve (5) and the Main steam control valves (7);The main steam electric control valve (4) successively subtracts with the steam Pressure device (29), the steam non-condensing type heat exchanger (28) vapour survey connection;The Main steam control valves (7) connect the high pressure Cylinder (6) entrance, mouth is measured in high pressure cylinder (6) outlet, the non-condensing type heat exchanger of the steam (28) vapour, the high pressure turbine by steams Vapour control valve (5) outlet is connected with the reheater (1) entrance;
Reheater (1) outlet is divided into three tunnels, is separately connected the reheated steam electric control valve (3), the reheated steam Control valve (8) and the low voltage bypass steam control valve (12);The reheated steam electric control valve (3) successively with the steam Condensation type heat exchanger (27) vapour is surveyed, the fused salt preheater (26) water side is connected with the oxygen-eliminating device (16);The reheated steam Control valve (8) connects medium pressure cylinder (9) entrance;Medium pressure cylinder (9) outlet successively with the low pressure (LP) cylinder (10), the condensing Device (11), the condensate pump (13), the low-pressure heating are connected to water- to-water heat exchanger (14) water side, the oxygen-eliminating device (16);Institute Low voltage bypass steam control valve (12) is stated to be connected with the condenser (11);The oxygen-eliminating device (16) and the water supply pump group (15) It is connected, water supply pump group (15) outlet is divided into two-way respectively with the hyperbaric heating to water- to-water heat exchanger (17) water side entrance and institute High-temperature molten salt is stated to be connected to water- to-water heat exchanger (21) water side entrance;The hyperbaric heating is to water- to-water heat exchanger (17) water side outlet and described High-temperature molten salt is connected to water- to-water heat exchanger (21) water side outlet with the boiler superheater (2) entrance;
Low-temperature molten salt storage tank (24) outlet connects the low-temperature molten salt pump (25), and the low-temperature molten salt pumps described in (25) connection Fused salt preheater (26) salt side entrance, fused salt preheater (26) the salt side outlet are divided into two-way and are separately connected the steam condensation Type heat exchanger (27) salt side entrance and the non-condensing type heat exchanger of steam (28) salt side entrance;The steam condensation type heat exchanger (27) Salt side outlet connects the salt storage tank (23) entrance, the high temperature with the non-condensing type heat exchanger of steam (28) salt side outlet Fused salt storage tank (23) outlet is sequentially connected the high-temperature melting salt pump (22), the high-temperature molten salt enters to water- to-water heat exchanger (21) salt side Mouthful, the high-temperature molten salt connects low-temperature molten salt storage tank (24) entrance to water- to-water heat exchanger (21) salt side outlet.
2. a kind of thermal power plant's depth peak regulation system according to claim 1, which is characterized in that the turbine high-pressure steam extraction System (20) connects the hyperbaric heating and surveys entrance to water- to-water heat exchanger (17) vapour, described in four sections of steam extractions (19) connections of the steam turbine Oxygen-eliminating device (16), the steam turbine low-pressure steam bleeding system (18) connect the low-pressure heating and survey entrance to water- to-water heat exchanger (14) vapour, The hyperbaric heating measures mouth to water- to-water heat exchanger (17) vapour and connects the oxygen-eliminating device (16), and the low-pressure heating is to water- to-water heat exchanger (14) vapour measures mouth and connects the condenser (11).
3. a kind of thermal power plant's depth peak regulation system according to claim 1, which is characterized in that by Main steam control valves (7), High pressure cylinder (6), reheater (1), reheated steam control valve (8), intermediate pressure cylinder (9), low pressure (LP) cylinder (10), condenser (11), condensed water Pump (13), low-pressure heating to water- to-water heat exchanger (14), oxygen-eliminating device (16), water supply pump group (15), hyperbaric heating to water- to-water heat exchanger (17), Superheater (2), turbine high-pressure steam bleeding system (20), four sections of steam extractions (19) of steam turbine and steam turbine low-pressure steam bleeding system (18) group At therrmodynamic system, retain the former Turbo-generator Set method of operation.
4. a kind of thermal power plant's depth peak regulation system according to claim 1, which is characterized in that boiler superheater (2) generates Steam, steam successively passes through Main steam control valves (7), high pressure cylinder (6), reheater (1), reheating by former power plant's method of operation all the way Steam control valve (8), intermediate pressure cylinder (9), low pressure (LP) cylinder (10), condenser (11), condensate pump (13), low-pressure heating are to water- to-water heat exchanger (14), oxygen-eliminating device (16), water supply pump group (15), hyperbaric heating enter boiler superheater (2) to water- to-water heat exchanger (17);Another way is steamed Vapour successively passes through main steam electric control valve (4), steam pressure-reducing device (29), the non-condensing type heat exchanger of steam (28), reheater (1), reheated steam electric control valve (3), steam condensation type heat exchanger (27), fused salt preheater (26) enter oxygen-eliminating device (16); Low-temperature molten salt in low-temperature molten salt storage tank (24) successively passes through low-temperature molten salt pump (25), fused salt preheater (26), steam condensation type Heat exchanger (27), the non-condensing type heat exchanger of steam (28) enter salt storage tank (23);The above process is unit load down tune Peak heat accumulation process.
5. a kind of thermal power plant's depth peak regulation system according to claim 1, which is characterized in that boiler superheater (2) generates Whole steam successively pass through Main steam control valves (7), high pressure cylinder (6), reheater (1), reheated steam control valve (8), middle pressure Cylinder (9), low pressure (LP) cylinder (10), condenser (11), condensate pump (13), low-pressure heating to water- to-water heat exchanger (14), oxygen-eliminating device (16), give Water pump group (15);Water supply pump group (15) exports water supply and is switched to high-temperature molten salt water supply heat exchange to water- to-water heat exchanger (17) by hyperbaric heating Device (21) enters boiler superheater (2);Turbine high-pressure steam bleeding system (20) and hyperbaric heating connect disconnected to water- to-water heat exchanger (17) It opens;Hyperbaric heating connect disconnection with oxygen-eliminating device (16) to water- to-water heat exchanger (17);High-temperature molten salt in salt storage tank (23) according to It is secondary to enter low-temperature molten salt storage tank (24) to water- to-water heat exchanger (21) by high-temperature melting salt pump (22), high-temperature molten salt;The above process is machine Group load up peak regulation heat release process.
6. a kind of thermal power plant's depth peak regulation system according to claim 1, which is characterized in that Turbo-generator Set response electricity Timing under net load depth guarantees boiler maximum efficiency, and steam enters former turbine system acting all the way, and it is negative to meet power grid Lotus response;Boiler superheater (2) generates excess steam successively in the non-condensing type heat exchanger of steam (28), steam condensation type heat exchanger (27), the interior low-temperature molten salt of fused salt preheater (26) and steam exchange heat, and complete heat storage.
7. a kind of thermal power plant's depth peak regulation system according to claim 1, which is characterized in that Turbo-generator Set response electricity When net load fast upregulation, the steam that boiler superheater (2) generates fully enters steam turbine acting;Hyperbaric heating is to water- to-water heat exchanger (17) method of operation is changed to high-temperature molten salt and gives water- to-water heat exchanger (21) operation, and cutting turbine high-pressure steam bleeding system (20) operation mentions High unit capability of fast response;High-temperature molten salt and high-pressure feed water exchange heat in high-temperature molten salt to water- to-water heat exchanger (21) is interior, complete Heat release.
8. a kind of thermal power plant's depth peak regulation system according to claim 1, which is characterized in that the non-condensing type of steam changes Hot device (28) vapour side outlet temperature and pressure is identical as the steam turbine high-pressure cylinder (6) steam drain temperature and pressure respectively.
9. a kind of thermal power plant's depth peak regulation system according to claim 7, which is characterized in that the high-temperature molten salt uses four First mixed inorganic, fusing point are 100 DEG C, and molten state use temperature range is 150 DEG C -625 DEG C.
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