CN110006026B - Deep peak regulation system of thermal power plant - Google Patents
Deep peak regulation system of thermal power plant Download PDFInfo
- Publication number
- CN110006026B CN110006026B CN201910313766.8A CN201910313766A CN110006026B CN 110006026 B CN110006026 B CN 110006026B CN 201910313766 A CN201910313766 A CN 201910313766A CN 110006026 B CN110006026 B CN 110006026B
- Authority
- CN
- China
- Prior art keywords
- steam
- heat exchanger
- molten salt
- pressure
- water supply
- 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.)
- Active
Links
Classifications
-
- 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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, 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
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, 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
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
- F28D2020/0047—Heat 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
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The invention discloses a deep peak regulation system of a thermal power plant, which comprises a superheater, a reheater, a high-pressure cylinder, a reheat steam electric regulating valve, a main steam electric regulating valve, a medium-pressure cylinder, a low-pressure cylinder, a condenser, a condensate pump, a low-pressure heating water supply heat exchanger, a water supply pump group, a deaerator, a high-pressure heating water supply heat exchanger, a low-pressure steam extraction system of a steam turbine, four-section steam extraction, a high-pressure steam extraction system of the steam turbine, a high-temperature molten salt water supply heat exchanger, a high-temperature molten salt pump, a high-temperature molten salt storage tank, a low-temperature molten salt pump, a molten salt preheater, a steam condensing heat exchanger, a steam non-condensing heat exchanger, a steam pressure reducing device and the like; according to the invention, the molten salt heat storage technology is utilized to store redundant steam heat during load-reducing peak-shaving of the unit, and in the load-lifting peak-shaving process of the unit, high-temperature molten salt is used for heating high-pressure water supply to reduce steam extraction of a steam turbine, so that the output of the steam turbine is increased, the thermal efficiency of the unit is improved, and the flexibility deep peak-shaving of a thermal power plant is realized.
Description
Technical Field
The invention relates to a thermal power plant flexibility transformation scheme, in particular to a thermal power plant depth peak regulation system capable of realizing thermal power plant depth peak regulation.
Background
The domestic electric power energy structure is continuously adjusted, the installed capacity of the renewable energy is continuously increased, and because of the intermittence and instability of the renewable energy, the potential hazard of a certain degree is caused to the safe operation of the power grid, and in order to enlarge the consumption of the renewable energy, the flexibility of the thermal power generating unit is required to be increased so as to ensure the stability of the power load. In addition, the single-machine capacity of the thermal power generating unit is continuously increased, so that the interval from low load to high load of the unit is enlarged, and the adjustment performance of the electric quantity at the adjustment peak and valley is deteriorated. Especially, in the night peak regulation process of the unit, the power grid load is smaller than the lowest stable combustion load of the boiler, so that part of energy is wasted, and how to use the part of energy is the key task of the current research.
The invention provides a deep peak regulation system of a thermal power plant, which is characterized in that a fused salt heat storage and release device is added on the basis of the original thermal power plant, redundant steam generated in the running process of a unit is subjected to heat storage, and part of heat is heated to high-pressure water supply in the load rising process after the peak regulation of the unit is finished, so that the steam extraction amount of a steam turbine is reduced, the running efficiency of the unit can be improved, the regulation characteristic of the unit can be increased, and the maximization of the efficiency of the thermal power unit is realized. Therefore, the invention discloses a deep peak shaving system of a thermal power plant, which meets the thermal requirement of the thermal power plant during deep peak shaving.
Disclosure of Invention
The invention solves the technical problem of providing a deep peak shaving system of a thermal power plant, which utilizes a fused salt heat storage technology to store redundant steam heat during load-reducing peak shaving of a unit, and uses high-temperature fused salt to heat high-pressure water supply to reduce steam extraction of a steam turbine during load-lifting peak shaving of the unit, thereby increasing output of the steam turbine, improving thermal efficiency of the unit and realizing flexibility deep peak shaving of the thermal power plant.
The technical scheme of the invention is as follows:
the deep peak regulation system of the thermal power plant is characterized by comprising a reheater 1, a superheater 2, a reheat steam electric regulating valve 3, a main steam electric regulating valve 4, a high-pressure bypass steam control valve 5, a high-pressure cylinder 6, a main steam control valve 7, a reheat steam control valve 8, a medium-pressure cylinder 9, a low-pressure cylinder 10, a condenser 11, a low-pressure bypass steam control valve 12, a condensate pump 13, a low-pressure heating water supply heat exchanger 14, a water supply pump group 15, a deaerator 16, a high-pressure heating water supply heat exchanger 17, a turbine low-pressure steam extraction system 18, a four-stage steam extraction 19, a turbine high-pressure steam extraction system 20, a high-temperature molten salt water supply heat exchanger 21, a high-temperature molten salt pump 22, a high-temperature molten salt storage tank 23, a low-temperature molten salt storage tank 24, a low-temperature molten salt pump 25, a molten salt preheater 26, a steam condensation heat exchanger 27, a steam non-condensation heat exchanger 28 and a steam device 29.
The outlet of the boiler superheater 2 is divided into three paths which are respectively connected with the main steam electric regulating valve 4, the high-pressure bypass steam control valve 5 and the main steam control valve 7; the main steam electric regulating valve 4 is sequentially connected with the steam pressure reducing device 29 and the steam non-condensing heat exchanger 28 in a steam measuring way; the main steam control valve 7 is connected with the inlet of the high-pressure cylinder 6, and the outlet of the high-pressure cylinder 6, the steam detection outlet of the steam non-condensing heat exchanger 28 and the outlet of the high-pressure bypass steam control valve 5 are connected with the inlet of the reheater 1.
The outlet of the reheater 1 is divided into three paths which are respectively connected with the reheat steam electric regulating valve 3, the reheat steam control valve 8 and the low-pressure bypass steam control valve 12; the reheat steam electric regulating valve 3 is sequentially connected with the steam condensation type heat exchanger 27, the water side of the molten salt preheater 26 and the deaerator 16; the reheat steam control valve 8 is connected with the inlet of the medium pressure cylinder 9; the outlet of the medium-pressure cylinder 9 is sequentially connected with the low-pressure cylinder 10, the condenser 11, the condensate pump 13, the water side of the low-pressure heating feedwater heat exchanger 14 and the deaerator 16; the low-pressure bypass steam control valve 12 is connected with the condenser 11; the deaerator 16 is connected with the water supply pump set 15, and the outlet of the water supply pump set 15 is divided into two paths which are respectively connected with the water side inlet of the high-pressure heating water supply heat exchanger 17 and the water side inlet of the high-temperature molten salt water supply heat exchanger 21; the water side outlet of the high-pressure heating water supply heat exchanger 17 and the water side outlet of the high-temperature molten salt water supply heat exchanger 21 are connected with the inlet of the boiler superheater 2.
The outlet of the low-temperature molten salt storage tank 24 is connected with the low-temperature molten salt pump 25, the low-temperature molten salt pump 25 is connected with the salt side inlet of the molten salt preheater 26, and the salt side outlet of the molten salt preheater 26 is divided into two paths which are respectively connected with the salt side inlet of the steam condensing heat exchanger 27 and the salt side inlet of the steam non-condensing heat exchanger 28; the salt side outlet of the steam condensation type heat exchanger 27 and the salt side outlet of the steam non-condensation type heat exchanger 28 are connected with the inlet of the high-temperature molten salt storage tank 23, the outlet of the high-temperature molten salt storage tank 23 is sequentially connected with the high-temperature molten salt pump 22 and the salt side inlet of the high-temperature molten salt water supply heat exchanger 21, and the salt side outlet of the high-temperature molten salt water supply heat exchanger 21 is connected with the inlet of the low-temperature molten salt storage tank 24.
The high-pressure steam extraction system 20 of the steam turbine is connected with the steam measuring inlet of the high-pressure heating water supply heat exchanger 17, the four-section steam extraction 19 of the steam turbine is connected with the deaerator 16, the low-pressure steam extraction system 18 of the steam turbine is connected with the steam measuring inlet of the low-pressure heating water supply heat exchanger 14, the steam measuring outlet of the high-pressure heating water supply heat exchanger 17 is connected with the deaerator 16, and the steam measuring outlet of the low-pressure heating water supply heat exchanger 14 is connected with the condenser 11.
The thermodynamic system consisting of a main steam control valve 7, a high-pressure cylinder 6, a reheater 1, a reheat steam control valve 8, a medium-pressure cylinder 9, a low-pressure cylinder 10, a condenser 11, a condensate pump 13, a low-pressure heating water supply heat exchanger 14, a deaerator 16, a water supply pump group 15, a high-pressure heating water supply heat exchanger 17, a superheater 2, a turbine high-pressure steam extraction system 20, a turbine four-section steam extraction 19 and a turbine low-pressure steam extraction system 18 is reserved, and the operation mode of the original turbine generator unit is reserved.
The boiler superheater 2 generates steam, and one path of steam sequentially passes through a main steam control valve 7, a high-pressure cylinder 6, a reheater 1, a reheat steam control valve 8, a medium-pressure cylinder 9, a low-pressure cylinder 10, a condenser 11, a condensate pump 13, a low-pressure heating water supply heat exchanger 14, a deaerator 16, a water supply pump group 15 and a high-pressure heating water supply heat exchanger 17 according to the original power plant operation mode to enter the boiler superheater 2; the other path of steam sequentially passes through the main steam electric regulating valve 4, the steam pressure reducing device 29, the steam non-condensing heat exchanger 28, the reheater 1, the reheating steam electric regulating valve 3, the steam condensing heat exchanger 27 and the molten salt preheater 26 to enter the deaerator 16; the low-temperature molten salt in the low-temperature molten salt storage tank 24 sequentially passes through the low-temperature molten salt pump 25, the molten salt preheater 26, the steam condensing heat exchanger 27 and the steam non-condensing heat exchanger 28 to enter the high-temperature molten salt storage tank 23; the process is a load-reducing peak-shaving heat-storing process of the unit.
All steam generated by the boiler superheater 2 sequentially passes through a main steam control valve 7, a high-pressure cylinder 6, a reheater 1, a reheat steam control valve 8, a medium-pressure cylinder 9, a low-pressure cylinder 10, a condenser 11, a condensate pump 13, a low-pressure heating water supply heat exchanger 14, a deaerator 16 and a water supply pump set 15; the water supply at the outlet of the water supply pump group 15 is switched from the high-pressure heating water supply heat exchanger 17 to the high-temperature molten salt water supply heat exchanger 21 to enter the boiler superheater 2; the high-pressure steam extraction system 20 of the steam turbine is disconnected with the high-pressure heating water supply heat exchanger 17; the high-pressure heating water supply heat exchanger 17 is disconnected with the deaerator 16; the high-temperature molten salt in the high-temperature molten salt storage tank 23 sequentially passes through the high-temperature molten salt pump 22 and the high-temperature molten salt water supply heat exchanger 21 to enter the low-temperature molten salt storage tank 24; the process is a unit load lifting peak shaving and heat releasing process.
A thermal power plant depth peak shaving system comprises the following steps:
when the steam turbine generator unit responds to the deep down regulation of the power grid load, the optimal operation efficiency of the boiler is ensured, one path of steam enters the original steam turbine system to apply work, and the power grid load response is met; the boiler superheater 2 generates redundant steam, and the redundant steam exchanges heat with the steam in the steam non-condensing heat exchanger 28, the steam condensing heat exchanger 27 and the molten salt preheater 26 in sequence to finish heat storage;
when the turbo generator set responds to the rapid up-regulation of the power grid load, all the steam generated by the boiler superheater 2 enters the steam turbine to do work; the operation mode of the high-pressure heating water supply heat exchanger 17 is changed into the operation mode of the high-temperature molten salt water supply heat exchanger 21, so that the operation of the high-pressure steam extraction system 20 of the steam turbine is cut off, and the quick response capability of the unit is improved; the high-temperature molten salt exchanges heat with the high-pressure water in the high-temperature molten salt water supply heat exchanger 21 to finish heat release;
the deep peak regulating system of the thermal power plant is characterized in that the temperature and the pressure of the steam side outlet of the steam non-condensing heat exchanger 28 are respectively the same as the temperature and the pressure of the steam outlet of the high-pressure cylinder 6 of the steam turbine.
The deep peak regulation system of the thermal power plant is characterized in that quaternary mixed inorganic salt is used as the high-temperature molten salt, the melting point is 100 ℃, and the using temperature range of a molten state is 150-625 ℃.
Compared with the prior peak shaving technology, the deep peak shaving system of the thermal power plant has the following technical advantages:
(1) The fused salt heat storage technology is utilized to maintain the operation efficiency of the boiler to be optimal, so that the operation economy of the large coal-fired unit is improved;
(2) The steam non-condensing type heat exchanger is adopted to enable molten salt and steam to exchange heat, the steam returns to the reheater, the phenomenon of overtemperature of a heating surface at the tail part of the boiler caused by the increase of the steam extraction quantity is avoided, the original heat load of the boiler is not changed, and the operation safety of the boiler is ensured;
(3) The utilization of the heat storage system reduces the load of the generator set, can increase the network access quantity of renewable energy sources, and increases the adjustability of the power grid.
Drawings
FIG. 1 is a schematic flow chart of a deep peak shaving system of a thermal power plant according to the present invention;
FIG. 2 is a flow chart of the unit load reduction peak shaving heat storage process of the invention;
FIG. 3 is a flow chart of the unit load peak shaving and heat release process of the present invention.
1: reheater 2: superheater 3: electric regulating valve for reheat steam
4: main steam electric regulating valve 5: high pressure bypass steam control valve 6: high-pressure cylinder
7: main steam control valve 8: reheat steam control valve 9: medium pressure cylinder
10: low pressure cylinder 11: condenser 12: low pressure bypass steam control valve
13: condensate pump 14: low pressure heating feedwater heat exchanger 15: water supply pump set
16: deaerator 17: high pressure heating feedwater heat exchanger 18: low-pressure steam extraction system of steam turbine
19: four-stage extraction 20: the turbine high-pressure steam extraction system 21: high-temperature molten salt water supply heat exchanger
22: high temperature molten salt pump 23: high temperature molten salt storage tank 24: low-temperature molten salt storage tank
25: low temperature molten salt pump 26: molten salt preheater 27: steam condensing heat exchanger
28: steam non-condensing heat exchanger 29: steam pressure reducing device
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, a preferred embodiment of a deep peak shaving system of a thermal power plant according to the present invention is shown in fig. 1, a load-reducing peak shaving heat storage process of a unit is shown in fig. 2, a load-lifting peak shaving heat release process of a unit is shown in fig. 3.
In the above-mentioned deep peak shaving system of thermal power plant, in a preferred embodiment, the load of the unit is reduced, peak shaving and heat storage processes are as follows:
as shown in fig. 2, when the steam turbine generator unit responds to the deep down regulation of the load of a power grid, steam generated by the boiler superheater 2 sequentially passes through a main steam control valve 7, a high-pressure cylinder 6, a reheater 1, a reheat steam control valve 8, a medium-pressure cylinder 9, a low-pressure cylinder 10, a condenser 11, a condensate pump 13, a low-pressure heating water supply heat exchanger 14, a deaerator 16, a water supply pump group 15 and a high-pressure heating water supply heat exchanger 17 according to the operation mode of the original power plant, and enters the boiler superheater 2; the other path of steam sequentially passes through the main steam electric regulating valve 4, the steam pressure reducing device 29, the steam non-condensing heat exchanger 28, the reheater 1, the reheating steam electric regulating valve 3, the steam condensing heat exchanger 27 and the molten salt preheater 26 to enter the deaerator 16; the low-temperature molten salt in the low-temperature molten salt storage tank 24 sequentially passes through the low-temperature molten salt pump 25, the molten salt preheater 26, the steam condensing heat exchanger 27 and the steam non-condensing heat exchanger 28 to enter the high-temperature molten salt storage tank 23, and the steam and the low-temperature molten salt complete heat exchange and storage in the steam non-condensing heat exchanger 28, the steam condensing heat exchanger 27 and the molten salt preheater 26.
In the above-mentioned deep peak shaving system of thermal power plant, in a preferred embodiment, the unit load lifting peak shaving and heat releasing process is as follows:
as shown in fig. 3, when the turbo generator set responds to the up-regulation of the load of the power grid, all steam generated by the boiler superheater 2 sequentially passes through a main steam control valve 7, a high-pressure cylinder 6, a reheater 1, a reheat steam control valve 8, a medium-pressure cylinder 9, a low-pressure cylinder 10, a condenser 11, a condensate pump 13, a low-pressure heating water supply heat exchanger 14, a deaerator 16 and a water supply pump set 15; the water supply at the outlet of the water supply pump group 15 is switched from the high-pressure heating water supply heat exchanger 17 to the high-temperature molten salt water supply heat exchanger 21 to enter the boiler superheater 2; the high-pressure steam extraction system 20 of the steam turbine is disconnected with the high-pressure heating water supply heat exchanger 17; the high-pressure heating water supply heat exchanger 17 is disconnected with the deaerator 16; the high-temperature molten salt in the high-temperature molten salt storage tank 23 sequentially passes through the high-temperature molten salt pump 22 and the high-temperature molten salt water supply heat exchanger 21 to enter the low-temperature molten salt storage tank 24, and the high-temperature molten salt and the high-pressure water supply exchange heat in the high-temperature molten salt water supply heat exchanger 21 to finish heat release.
The foregoing has outlined rather broadly the structural, conceptual and technical advantages of the present invention. Equivalent changes and modifications will occur to those skilled in the art without departing from the spirit and principles of the invention, and it is intended to cover the scope of the invention.
Claims (7)
1. The deep peak regulation system of the thermal power plant is characterized by comprising a reheater (1), a boiler superheater (2), a reheat steam electric regulating valve (3), a main steam electric regulating valve (4), a high-pressure bypass steam control valve (5), a high-pressure cylinder (6), a main steam control valve (7), a reheat steam control valve (8), a medium-pressure cylinder (9), a low-pressure cylinder (10), a condenser (11), a low-pressure bypass steam control valve (12), a condensate pump (13), a low-pressure heating water supply heat exchanger (14), a water supply pump group (15), a deaerator (16), a high-pressure heating water supply heat exchanger (17), a steam turbine low-pressure steam extraction system (18), a steam turbine four-stage steam extraction system (19), a steam turbine high-pressure steam extraction system (20), a high-temperature molten salt water supply heat exchanger (21), a high-temperature molten salt pump (22), a high-temperature molten salt storage tank (23), a low-temperature storage tank (24), a low-temperature molten salt pump (25), a molten salt preheater (26), a steam condensing heat exchanger (27), a steam non-condensing heat exchanger (28) and a steam decompression device (29);
the outlet of the boiler superheater (2) is divided into three paths which are respectively connected with the main steam electric regulating valve (4), the high-pressure bypass steam control valve (5) and the main steam control valve (7); the main steam electric regulating valve (4) is connected with the steam pressure reducing device (29) and the steam non-condensing heat exchanger (28) in sequence; the main steam control valve (7) is connected with the inlet of the high-pressure cylinder (6), and the outlet of the high-pressure cylinder (6), the steam detection outlet of the steam non-condensing heat exchanger (28) and the outlet of the high-pressure bypass steam control valve (5) are connected with the inlet of the reheater (1);
the outlet of the reheater (1) is divided into three paths which are respectively connected with the reheat steam electric regulating valve (3), the reheat steam control valve (8) and the low-pressure bypass steam control valve (12); the reheat steam electric regulating valve (3) is sequentially connected with the steam test of the steam condensing heat exchanger (27), the water side of the molten salt preheater (26) and the deaerator (16); the reheat steam control valve (8) is connected with the inlet of the medium pressure cylinder (9); the outlet of the medium pressure cylinder (9) is sequentially connected with the low pressure cylinder (10), the condenser (11), the condensate pump (13), the water side of the low pressure heating water supply heat exchanger (14) and the deaerator (16); the low-pressure bypass steam control valve (12) is connected with the condenser (11); the deaerator (16) is connected with the water supply pump set (15), and the outlet of the water supply pump set (15) is divided into two paths which are respectively connected with the water side inlet of the high-pressure heating water supply heat exchanger (17) and the water side inlet of the high-temperature molten salt water supply heat exchanger (21); the water side outlet of the high-pressure heating water supply heat exchanger (17) and the water side outlet of the high-temperature molten salt water supply heat exchanger (21) are connected with the inlet of the boiler superheater (2);
the outlet of the low-temperature molten salt storage tank (24) is connected with the low-temperature molten salt pump (25), the low-temperature molten salt pump (25) is connected with a salt side inlet of the molten salt preheater (26), and the salt side outlet of the molten salt preheater (26) is divided into two paths which are respectively connected with a salt side inlet of the steam condensing heat exchanger (27) and a salt side inlet of the steam non-condensing heat exchanger (28); the salt side outlet of the steam condensing heat exchanger (27) and the salt side outlet of the steam non-condensing heat exchanger (28) are connected with the inlet of the high-temperature molten salt storage tank (23), the outlet of the high-temperature molten salt storage tank (23) is sequentially connected with the high-temperature molten salt pump (22) and the salt side inlet of the high-temperature molten salt water supply heat exchanger (21), and the salt side outlet of the high-temperature molten salt water supply heat exchanger (21) is connected with the inlet of the low-temperature molten salt storage tank (24);
the high-pressure steam extraction system (20) of the steam turbine is connected with a steam measuring inlet of the high-pressure heating water supply heat exchanger (17), the four-section steam extraction system (19) of the steam turbine is connected with the deaerator (16), the low-pressure steam extraction system (18) of the steam turbine is connected with a steam measuring inlet of the low-pressure heating water supply heat exchanger (14), the steam measuring outlet of the high-pressure heating water supply heat exchanger (17) is connected with the deaerator (16), and the steam measuring outlet of the low-pressure heating water supply heat exchanger (14) is connected with the condenser (11);
the system comprises a main steam control valve (7), a high-pressure cylinder (6), a reheater (1), a reheat steam control valve (8), a medium-pressure cylinder (9), a low-pressure cylinder (10), a condenser (11), a condensate pump (13), a low-pressure heating water supply heat exchanger (14), a deaerator (16), a water supply pump group (15), a high-pressure heating water supply heat exchanger (17), a boiler superheater (2), a turbine high-pressure steam extraction system (20), a turbine four-section steam extraction (19) and a turbine low-pressure steam extraction system (18), and retains the operation mode of the original turbine generator unit.
2. The deep peak shaving system of the thermal power plant according to claim 1, wherein the boiler superheater (2) generates steam, and one path of steam sequentially passes through the main steam control valve (7), the high-pressure cylinder (6), the reheater (1), the reheat steam control valve (8), the medium-pressure cylinder (9), the low-pressure cylinder (10), the condenser (11), the condensate pump (13), the low-pressure heating feedwater heat exchanger (14), the deaerator (16), the feedwater pump group (15) and the high-pressure heating feedwater heat exchanger (17) to enter the boiler superheater (2) according to the original power plant operation mode; the other path of steam sequentially passes through a main steam electric regulating valve (4), a steam pressure reducing device (29), a steam non-condensing heat exchanger (28), a reheater (1), a reheat steam electric regulating valve (3), a steam condensing heat exchanger (27) and a molten salt preheater (26) to enter a deaerator (16); the low-temperature molten salt in the low-temperature molten salt storage tank (24) sequentially passes through the low-temperature molten salt pump (25), the molten salt preheater (26), the steam condensing heat exchanger (27) and the steam non-condensing heat exchanger (28) to enter the high-temperature molten salt storage tank (23); the process is a load-reducing peak-shaving heat-storing process of the unit.
3. The deep peak shaving system of a thermal power plant according to claim 1, wherein all steam generated by the boiler superheater (2) sequentially passes through a main steam control valve (7), a high-pressure cylinder (6), a reheater (1), a reheat steam control valve (8), a medium-pressure cylinder (9), a low-pressure cylinder (10), a condenser (11), a condensate pump (13), a low-pressure heating feedwater heat exchanger (14), a deaerator (16) and a feedwater pump set (15); the water supply at the outlet of the water supply pump set (15) is switched from a high-pressure heating water supply heat exchanger (17) to a high-temperature molten salt water supply heat exchanger (21) to enter a boiler superheater (2); the high-pressure steam extraction system (20) of the steam turbine is disconnected with the high-pressure heating water supply heat exchanger (17); the high-pressure heating water supply heat exchanger (17) is disconnected with the deaerator (16); the high-temperature molten salt in the high-temperature molten salt storage tank (23) sequentially passes through the high-temperature molten salt pump (22) and the high-temperature molten salt water supply heat exchanger (21) to enter the low-temperature molten salt storage tank (24); the process is a unit load lifting peak shaving and heat releasing process.
4. The deep peak regulation system of a thermal power plant according to claim 1, wherein when the steam turbine generator unit responds to the power grid load depth down regulation, the optimal operation efficiency of the boiler is ensured, one path of steam enters the original steam turbine system to apply work, and the power grid load response is met; the boiler superheater (2) generates redundant steam, and the redundant steam exchanges heat with the steam in the steam non-condensing heat exchanger (28), the steam condensing heat exchanger (27) and the molten salt preheater (26) in sequence, so that heat storage is completed.
5. The deep peak regulating system of the thermal power plant according to claim 1, wherein when the turbo generator set is quickly regulated up in response to the load of a power grid, all steam generated by the boiler superheater (2) enters the steam turbine to apply work; the operation mode of the high-pressure heating water supply heat exchanger (17) is changed into the operation mode of the high-temperature molten salt water supply heat exchanger (21), the operation of the high-pressure steam extraction system (20) of the steam turbine is cut off, and the quick response capability of the unit is improved; the high-temperature molten salt and the high-pressure water supply exchange heat in the high-temperature molten salt water supply heat exchanger (21) to finish heat release.
6. A deep peaking system in a thermal power plant according to claim 1, characterized in that the steam non-condensing heat exchanger (28) steam side outlet temperature and pressure are the same as the high pressure cylinder (6) exhaust steam outlet temperature and pressure, respectively.
7. The deep peak regulating system of thermal power plant according to claim 5, wherein the high-temperature molten salt uses quaternary mixed inorganic salt, the melting point is 100 ℃, and the molten state using temperature is 150-625 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910313766.8A CN110006026B (en) | 2019-04-18 | 2019-04-18 | Deep peak regulation system of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910313766.8A CN110006026B (en) | 2019-04-18 | 2019-04-18 | Deep peak regulation system of thermal power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110006026A CN110006026A (en) | 2019-07-12 |
| CN110006026B true CN110006026B (en) | 2023-10-17 |
Family
ID=67172836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910313766.8A Active CN110006026B (en) | 2019-04-18 | 2019-04-18 | Deep peak regulation system of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110006026B (en) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863870B (en) * | 2019-11-08 | 2022-04-19 | 河南九域恩湃电力技术有限公司 | Inclined temperature layer heat storage peak regulation system and peak regulation method based on high-pressure heating loop |
| CN110761859B (en) * | 2019-11-08 | 2022-04-22 | 河南九域恩湃电力技术有限公司 | Inclined temperature layer heat storage peak regulation system and peak regulation method based on low-pressure heating loop |
| CN111140296B (en) * | 2020-02-25 | 2024-02-06 | 中国电力工程顾问集团华东电力设计院有限公司 | Thermal power generating unit molten salt cascade storage and release energy peak regulation system and method |
| CN111255534A (en) * | 2020-03-31 | 2020-06-09 | 西安西热节能技术有限公司 | Steam storage peak regulation system and method applied to industrial steam supply system of coal-fired unit |
| CN111365086A (en) * | 2020-05-07 | 2020-07-03 | 西安西热节能技术有限公司 | Shutdown non-shutdown system and method based on molten salt heat storage |
| CN112983565A (en) * | 2021-02-19 | 2021-06-18 | 西安热工研究院有限公司 | Thermal power generating unit steam extraction auxiliary frequency modulation peak regulation system based on heat storage |
| CN113090352B (en) * | 2021-04-30 | 2023-06-20 | 中国电力工程顾问集团西北电力设计院有限公司 | Machine furnace decoupling system and method for improving peak regulation capacity of pure thermal power unit |
| CN113464226B (en) * | 2021-08-10 | 2023-05-26 | 山东英电环保科技有限公司 | System and method for quick response of unit frequency modulation |
| CN113863997A (en) * | 2021-08-27 | 2021-12-31 | 北京工业大学 | Wind power photovoltaic power generation auxiliary coal-fired unit flexible operation system |
| CN113586185B (en) * | 2021-09-13 | 2022-10-04 | 西安交通大学 | Coal-fired boiler flue gas and steam combined heat storage deep peak regulation system and operation method |
| CN113669715B (en) * | 2021-10-22 | 2022-01-07 | 杭州锅炉集团股份有限公司 | Energy storage peak shaving system suitable for reheating unit steam heating fused salt |
| CN114017148A (en) * | 2021-11-23 | 2022-02-08 | 河北鲲能电力工程咨询有限公司 | Peak regulation method for large coal-electricity steam heat storage power generation |
| CN114151777A (en) * | 2021-12-07 | 2022-03-08 | 北京工业大学 | Fused salt heat storage peak regulation and alternative start boiler system |
| CN114216108B (en) * | 2021-12-07 | 2024-02-06 | 北京工业大学 | Mixed heating fused salt heat accumulation peak shaving system |
| CN114251142A (en) * | 2021-12-14 | 2022-03-29 | 西安热工研究院有限公司 | Elastic heat storage type rapid peak regulation and medium-pressure heating system and method |
| CN114251137A (en) * | 2021-12-14 | 2022-03-29 | 西安热工研究院有限公司 | Photo-thermal coupled cooperative heat storage and peak regulation system and method |
| CN114233420B (en) * | 2021-12-15 | 2023-04-25 | 北京航空航天大学宁波创新研究院 | Thermoelectric cooperation system of coupled compressor unit and operation method |
| CN114233419B (en) * | 2021-12-15 | 2023-04-25 | 北京航空航天大学宁波创新研究院 | Thermoelectric cooperative system integrated with compressor unit and operation method |
| CN114233417B (en) * | 2021-12-22 | 2022-11-04 | 斯玛特储能技术有限公司 | Heat storage type deep flexible peak regulation thermal power generation system and heat storage and release method |
| CN114382559B (en) * | 2022-01-26 | 2022-08-30 | 斯玛特储能技术有限公司 | Double-medium heat storage type peak regulation thermal power generation system and heat storage and release method |
| CN114483216A (en) * | 2022-03-18 | 2022-05-13 | 吉林省众鑫能源服务有限公司 | Inverse heat transfer device for 'water-molten salt-steam' and application method thereof |
| CN114592934B (en) * | 2022-03-21 | 2023-11-17 | 西安热工研究院有限公司 | System and method for realizing thermal power unit transformation based on high-low parameter combined molten salt |
| CN114704815B (en) * | 2022-04-08 | 2023-11-07 | 西安热工研究院有限公司 | Steam heat storage system |
| CN114718676B (en) * | 2022-04-15 | 2023-07-25 | 西安热工研究院有限公司 | Heat storage and release system for fused salt heated by coal-fired unit steam |
| CN114876596B (en) * | 2022-05-18 | 2023-05-23 | 西安热工研究院有限公司 | Operation system and method for heat storage of molten salt steam of cylinder cutting unit |
| CN114876598B (en) * | 2022-06-16 | 2023-12-29 | 西安热工研究院有限公司 | Ultra-supercritical pure condensing unit containing molten salt energy storage system and working method thereof |
| CN115371027B (en) * | 2022-08-23 | 2024-04-30 | 中国科学院工程热物理研究所 | Thermal power peak regulation system |
| CN115234318B (en) * | 2022-09-22 | 2023-01-31 | 百穰新能源科技(深圳)有限公司 | Carbon dioxide energy storage system matched with thermal power plant deep peak regulation and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017073040A1 (en) * | 2015-10-28 | 2017-05-04 | 千代田化工建設株式会社 | Solar thermal power generation system and method for controlling same |
| CN107100684A (en) * | 2017-04-19 | 2017-08-29 | 百吉瑞（天津）新能源有限公司 | A kind of steam power plant utilizes boiler bypass depth of round peak regulation modernization system |
| CN206846684U (en) * | 2017-04-12 | 2018-01-05 | 东方电气集团东方锅炉股份有限公司 | A kind of liquid energy-storage system suitable for fired power generating unit depth peak regulation |
| CN108458329A (en) * | 2018-03-20 | 2018-08-28 | 上海锅炉厂有限公司 | A kind of tower type solar photo-thermal steam generating system adjusted using sloppy heat salt |
| CN108548168A (en) * | 2018-03-20 | 2018-09-18 | 北京工业大学 | A kind of thermal power plant's fused salt accumulation of heat peak regulation system heated using main steam |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130111902A1 (en) * | 2011-11-03 | 2013-05-09 | Mansour Maleki-Ardebili | Solar power system and method of operating a solar power system |
-
2019
- 2019-04-18 CN CN201910313766.8A patent/CN110006026B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017073040A1 (en) * | 2015-10-28 | 2017-05-04 | 千代田化工建設株式会社 | Solar thermal power generation system and method for controlling same |
| CN206846684U (en) * | 2017-04-12 | 2018-01-05 | 东方电气集团东方锅炉股份有限公司 | A kind of liquid energy-storage system suitable for fired power generating unit depth peak regulation |
| CN107100684A (en) * | 2017-04-19 | 2017-08-29 | 百吉瑞（天津）新能源有限公司 | A kind of steam power plant utilizes boiler bypass depth of round peak regulation modernization system |
| CN108458329A (en) * | 2018-03-20 | 2018-08-28 | 上海锅炉厂有限公司 | A kind of tower type solar photo-thermal steam generating system adjusted using sloppy heat salt |
| CN108548168A (en) * | 2018-03-20 | 2018-09-18 | 北京工业大学 | A kind of thermal power plant's fused salt accumulation of heat peak regulation system heated using main steam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110006026A (en) | 2019-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110006026B (en) | Deep peak regulation system of thermal power plant | |
| CN210197259U (en) | Deep peak regulation device of thermal power plant | |
| CN108316980B (en) | Fused salt heat accumulation and release peak shaving system of thermal power generating unit | |
| CN114216108B (en) | Mixed heating fused salt heat accumulation peak shaving system | |
| CN112610292A (en) | Deep peak regulation power generation system | |
| CN104976671B (en) | Wide-load heat supply energy-saving system of back pressure type small steam turbine driven water feeding pump | |
| CN113669715B (en) | Energy storage peak shaving system suitable for reheating unit steam heating fused salt | |
| CN113339775A (en) | Thermal power deep peak regulation system and peak regulation method based on boiler side heat storage | |
| CN112611010B (en) | Adjusting method of flexible adjusting system for power generation load of multi-heat-source cogeneration unit | |
| CN103075216A (en) | Brayton-cascade steam Rankine combined cycle power generation system | |
| CN114992613A (en) | Energy storage depth peak regulation system of steam-fused salt coupling | |
| CN111456818A (en) | Double-source heating fused salt energy storage system of thermal power plant | |
| CN109026240B (en) | Power generation system and method based on nuclear energy and solar energy coupling | |
| CN215170240U (en) | Heat-storage peak regulation system of thermal power plant | |
| CN113153465A (en) | Heat supply and power generation decoupling method and system for improving peak regulation capacity of heat supply unit | |
| CN111810261A (en) | Condensing unit peak regulation system | |
| CN112240231A (en) | Multi-source stable industrial steam supply system and method considering reliability and economy | |
| CN105042666B (en) | Wide-load heat supply energy-saving system of back pressure type small steam turbine driven draught fan | |
| CN112234650A (en) | Method for calculating thermoelectric peak regulation capacity of solar gas combined cycle unit | |
| CN217950479U (en) | Power plant cylinder cutting system capable of reducing steam consumption of cooling steam | |
| CN215372401U (en) | Thermal power depth peak regulation system based on boiler side heat storage | |
| CN215174935U (en) | High-low temperature heat storage peak shaving system of thermal power plant | |
| CN115749998A (en) | Device system for electrically coupling and heating molten salt by flue gas and new energy abandoned electricity and application method | |
| CN215170237U (en) | Flexible peak shaving system of thermal power plant based on heat storage | |
| CN215061976U (en) | Medium-low pressure supplies two thermoelectric decoupling systems of back pressure unit of taking out of supercritical that vapour is adjustable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |