CN114151777A - Fused salt heat storage peak regulation and alternative start boiler system - Google Patents
Fused salt heat storage peak regulation and alternative start boiler system Download PDFInfo
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- CN114151777A CN114151777A CN202111482290.4A CN202111482290A CN114151777A CN 114151777 A CN114151777 A CN 114151777A CN 202111482290 A CN202111482290 A CN 202111482290A CN 114151777 A CN114151777 A CN 114151777A
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- 150000003839 salts Chemical class 0.000 title claims abstract description 124
- 238000005338 heat storage Methods 0.000 title claims abstract description 40
- 238000010248 power generation Methods 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000010977 unit operation Methods 0.000 claims abstract description 4
- 230000001172 regenerating effect Effects 0.000 claims description 66
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 8
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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- 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
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
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- 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
- 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
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a fused salt heat storage peak shaving and alternative start boiler system, which comprises a traditional thermal power generation system and a fused salt heat storage peak shaving and alternative start boiler system. When the unit operation meets the power grid load requirement, the traditional thermal power generation system normally works, and the fused salt heat storage peak shaving and boiler system replacement starting quit the operation; when the load is reduced, the fused salt heat storage peak regulation operation mode is started, and the surplus electric quantity is converted into fused salt heat energy for storage; in the load increasing process, the fused salt heat storage peak-shaving operation mode is started, and the heat energy stored in the fused salt heats demineralized water to generate superheated steam which enters a low-pressure cylinder of the steam turbine; the unit is started for the first time after being stopped, the boiler is started in a boiler operation mode instead of being started, and molten salt is used for heating demineralized water to generate steam. The method utilizes the fused salt heat storage technology to adjust the peak of the thermal power generation and play a role of replacing a starting boiler, reduces the influence of long-term maintenance and unqualified environmental protection parameters of the original starting boiler, and improves the flexibility and the safety of the operation of the coal-fired unit.
Description
Technical Field
The invention relates to a flexible reconstruction scheme of a thermal power plant, in particular to a fused salt heat storage peak shaving and boiler system for replacing starting.
Background
Along with the large load change of the power grid, the load of the generator set is required to be increased in the peak period of power utilization, and the load of the generator set participating in power generation is required to be reduced deeply in the valley period of power utilization. The method has the advantages that the redundant generated energy is stored in the form of heat energy when the load of the unit is reduced and the peak is regulated by utilizing the fused salt heat storage technology, the stored heat is utilized to heat steam when the load is increased and the peak is regulated, the electricity generation is increased, the effect of fast peak regulation and frequency modulation is achieved, simultaneously, in order to strive for realizing carbon peak reaching and carbon neutralization, the use of renewable energy sources is more and more needed and the emission of pollution is reduced, the absorption capacity of the renewable energy sources can be improved by utilizing the fused salt heat storage technology, and the flexibility of the unit operation is improved.
The method utilizes the fused salt heat storage technology to adjust the peak of the thermal power generation and play a role of replacing a starting boiler, reduces the influence of long-term maintenance of the original starting boiler and unqualified environmental protection parameters, and improves the flexibility and safety of the operation of the coal-fired unit.
Disclosure of Invention
The invention solves the technical problem of providing a fused salt heat storage peak shaving and alternative start boiler system, and utilizes the fused salt heat storage technology to store redundant electric energy in a high-temperature fused salt tank in an electric heating mode when a unit reduces load and peaks, and uses high-temperature fused salt to heat demineralized water to generate superheated steam in the process of increasing load and peaks, thereby increasing the output of a steam turbine, improving the heat efficiency of the unit and realizing flexible deep peak shaving of a thermal power plant. The superheated steam generated by the demineralized water can be used for providing shaft seal air supply through the auxiliary steam header, and the effect of replacing the boiler system is achieved when the unit is started for the first time after being stopped.
The technical solution of the invention is as follows:
the utility model provides a fused salt heat-retaining peak shaving and substitute start boiler system, includes traditional thermal power system 1 and fused salt heat-retaining peak shaving and substitutes start boiler system 2, its characterized in that: the fused salt heat storage peak shaving and alternative start boiler system 2 is integrated with the conventional thermal power generation system 1 through an interface 35.
Fused salt heat storage peak shaving and alternative start boiler system 2 includes: the system comprises an electric switch 11, a superheater 24, an evaporator 25, a preheater 26, a low-temperature molten salt storage tank 27, a low-temperature molten salt pump 28, a molten salt electric heater 29, a high-temperature molten salt storage tank 30, a high-temperature molten salt pump 31, a second stop valve 32, a third stop valve 33, a steam regulating valve 34 and an interface 35.
The front end of the electric switch 11 is connected with a generator 10 of the traditional thermal power generation system 1, and the rear end is connected with a fused salt electric heater 29 of the fused salt heat storage peak shaving and alternative start boiler system 2; the low-temperature molten salt storage tank 27 is connected with the low-temperature molten salt pump 28, the molten salt electric heater 29 and the high-temperature molten salt storage tank 30; the above connections constitute a load shedding and peak shaving system.
The high-temperature molten salt storage tank 30 is sequentially connected with the high-temperature molten salt pump 31, the superheater 24, the evaporator 25, the preheater 26 and the low-temperature molten salt storage tank 27; the preheater 26 is connected with the evaporator 25 and the superheater 24 in sequence; the outlet of the superheater 24 is provided with an interface 35 connected with the traditional thermal power generation system 1 and is divided into two paths, one path of the interface is sequentially connected with the third stop valve 33 and the steam regulating valve 34 and enters a low-pressure cylinder of the traditional thermal power generation system 1, and a load-lifting peak-shaving system is formed; and the other path is sequentially connected with the second stop valve 32 and the auxiliary steam header 17 to form a boiler system for replacing starting.
The conventional thermal power generation system 1 includes: the system comprises a boiler superheater 3, a boiler reheater 4, a main steam control valve 5, a high-pressure cylinder 6, a reheated steam control valve 7, an intermediate pressure cylinder 8, a low-pressure cylinder 9, a generator 10, a condenser 12, a condensate pump 13, a first reheated heater 14, a second reheated heater 15, a third reheated heater 16, an auxiliary steam header 17, a first stop valve 18, a water feed pump set 19, a deaerator 20, a fourth reheated heater 21, a fifth reheated heater 22 and a sixth reheated heater 23;
an outlet of the boiler superheater 3 is sequentially connected with an inlet of the main steam control valve 5 and an inlet of the high-pressure cylinder 6, and an outlet of the high-pressure cylinder 6 is connected with an inlet of the boiler reheater 4; the outlet of the boiler reheater 4 is sequentially connected with the reheat steam control valve 7 and the inlet of the intermediate pressure cylinder 8; the outlet of the intermediate pressure cylinder 8 is connected with the inlet of the low pressure cylinder 9; the low-pressure cylinder 9 is connected with the generator 10 through a shaft; the outlet of the low pressure cylinder 9 is sequentially connected with the condenser 12, the condensate pump 13, the first regenerative heater 14, the second regenerative heater 15, the third regenerative heater 16, the deaerator 20 and the feed pump unit 19; and the outlet of the feed pump set 19 is sequentially connected with the No. 4 regenerative heater 21, the No. 5 regenerative heater 22, the No. 6 regenerative heater 23 and the inlet of the boiler superheater 3.
The middle stage and the last stage of the high-pressure cylinder 6 are respectively connected with the steam side inlets of the No. 6 regenerative heater 23 and the No. 5 regenerative heater 22; the middle stage of the intermediate pressure cylinder 8 is connected with the No. 4 regenerative heater 21, the last stage of the intermediate pressure cylinder 8 is respectively connected with the steam side inlet of the deaerator 20 and the first stop valve 18, and the first stop valve 18 is connected with the auxiliary steam header 17; the middle stage of the low pressure cylinder 9 is respectively connected with the steam side inlets of the No. 3 regenerative heater 16, the No. 2 regenerative heater 15 and the No. 1 regenerative heater 14; the No. 6 regenerative heater 23 is connected with the No. 5 regenerative heater 22, the No. 4 regenerative heater 21 and the deaerator 20 in sequence; the No. 3 regenerative heater 16 is sequentially connected with the No. 2 regenerative heater 15, the No. 1 regenerative heater 14 and the condenser 13;
the high-temperature molten salt is multi-element mixed inorganic salt, and the use temperature range is 150-800 ℃.
A fused salt heat storage peak regulation and alternative start boiler system is provided, and the using method comprises the following steps:
when the unit operation meets the power grid load requirement, the traditional thermal power generation system 1 normally works, and the fused salt heat storage peak shaving and boiler system 2 alternative starting quits the operation;
when the load reduction and peak regulation process of the unit is carried out, the electric switch 11 is closed, the traditional thermal power generation operation system and the load reduction and peak regulation system operate, the redundant electric quantity generated by the generator 10 heats the molten salt through the molten salt electric heater 29, and the electric energy is stored in the high-temperature molten salt tank 30 in the form of heat energy;
when the unit is in a load-lifting process, the traditional thermal power generation operation system and the load-lifting peak-shaving system operate, high-temperature molten salt in the high-temperature molten salt storage tank 30 is used for heating demineralized water in the preheater 26, the evaporator 25 and the superheater 24 to generate superheated steam, the superheated steam enters the low-pressure cylinder of the steam turbine, the steam flow in the steam turbine is increased, and the release of the heat of the molten salt and the lifting of the unit load are realized;
when the unit is started for the first time after being stopped, the starting boiler system is started instead of being started, high-temperature molten salt in the high-temperature molten salt storage tank 30 is used for heating demineralized water in the preheater 26, the evaporator 25 and the superheater 24 to generate superheated steam, the superheated steam enters the auxiliary steam header 17 to supply steam for the shaft seal, and the starting conditions of the unit are met.
The invention has the following technical advantages:
(1) a fused salt heat storage peak shaving and alternative start boiler system comprises a traditional thermal power generation system 1 and a fused salt heat storage peak shaving and alternative start boiler system 2, meets the deep peak shaving requirement of a unit, and improves the flexibility of operation of a coal-fired unit.
(2) By utilizing a fused salt heat storage technology and using multi-element mixed inorganic salt, the using temperature range is 150-800 ℃, the heat storage capacity is enhanced, the operation efficiency of the boiler can be effectively maintained at the best, and the operation economy of a large coal-fired unit is improved;
(3) the unit is started for the first time after shutdown, the operation mode of the boiler is started by using the fused salt heat storage peak shaving and the boiler replacing the start in the boiler system 2, the demineralized water is heated by using the fused salt to generate steam, the steam enters the auxiliary steam header to supply steam for the shaft seal, and the starting condition of the unit is met. The influence that the original boiler needs to be maintained for a long time and the environmental protection parameters do not reach the standard is reduced.
Drawings
FIG. 1 is a schematic flow diagram of a fused salt heat storage peak shaving and alternative start-up boiler system according to the present invention;
FIG. 2 is a schematic view of the operation flow of load reduction and peak shaving of the unit of the present invention;
FIG. 3 is a schematic view of the load-lifting and peak-shaving flow of the unit of the present invention;
FIG. 4 is a schematic flow diagram of a molten salt heat storage system in place of a start-up boiler system according to the present invention.
Description of main original symbols:
the system comprises a traditional thermal power generation system 1, a fused salt heat storage peak shaving and alternative start boiler system 2, a boiler superheater 3, a boiler reheater 4, a main steam control valve 5, a high-pressure cylinder 6, a reheated steam control valve 7, an intermediate pressure cylinder 8, a low-pressure cylinder 9, a generator 10, an electric switch 11, a condenser 12, a condensate pump 13, a first regenerative heater 14, a second regenerative heater 15, a third regenerative heater 16, an auxiliary steam header 17, a first stop valve 18, a water feed pump set 19, a deaerator 20, a fourth regenerative heater 21, a fifth regenerative heater 22, a sixth regenerative heater 23, a superheater 24, an evaporator 25, a preheater 26, a low-temperature fused salt storage tank 27, a low-temperature fused salt pump 28, a fused salt electric heater 29, a high-temperature fused salt storage tank 30, a high-temperature fused salt pump 31, a second stop valve 32, a third stop valve 33, a steam regulating valve 34 and an interface 35.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1, a schematic flow diagram of a molten salt heat storage peak shaving and alternative start-up boiler system:
the system comprises a traditional thermal power generation system 1 and a fused salt heat storage peak shaving and alternative starting boiler system 2, wherein the fused salt heat storage peak shaving and alternative starting boiler system 2 is integrated with the traditional thermal power generation system 1 through an interface 35.
Fused salt heat storage peak shaving and alternative start boiler system 2 includes: the system comprises an electric switch 11, a superheater 24, an evaporator 25, a preheater 26, a low-temperature molten salt storage tank 27, a low-temperature molten salt pump 28, a molten salt electric heater 29, a high-temperature molten salt storage tank 30, a high-temperature molten salt pump 31, a second stop valve 32, a third stop valve 33, a steam regulating valve 34 and an interface 35.
The front end of the electric switch 11 is connected with a generator 10 of the traditional thermal power generation system 1, and the rear end is connected with a fused salt electric heater 29 of the fused salt heat storage peak shaving and alternative start boiler system 2; the low-temperature molten salt storage tank 27 is connected with the low-temperature molten salt pump 28, the molten salt electric heater 29 and the high-temperature molten salt storage tank 30; the above connections constitute a load shedding and peak shaving system.
The high-temperature molten salt storage tank 30 is sequentially connected with the high-temperature molten salt pump 31, the superheater 24, the evaporator 25, the preheater 26 and the low-temperature molten salt storage tank 27; the preheater 26 is connected with the evaporator 25 and the superheater 24 in sequence; the outlet of the superheater 24 is provided with an interface 35 connected with the traditional thermal power generation system 1 and is divided into two paths, one path of the interface is sequentially connected with the third stop valve 33 and the steam regulating valve 34 and enters a low-pressure cylinder of the traditional thermal power generation system 1, and a load-lifting peak-shaving system is formed; and the other path is sequentially connected with the second stop valve 32 and the auxiliary steam header 17 to form a boiler system for replacing starting.
The conventional thermal power generation system 1 includes: the system comprises a boiler superheater 3, a boiler reheater 4, a main steam control valve 5, a high-pressure cylinder 6, a reheated steam control valve 7, an intermediate pressure cylinder 8, a low-pressure cylinder 9, a generator 10, a condenser 12, a condensate pump 13, a first reheated heater 14, a second reheated heater 15, a third reheated heater 16, an auxiliary steam header 17, a first stop valve 18, a water feed pump set 19, a deaerator 20, a fourth reheated heater 21, a fifth reheated heater 22 and a sixth reheated heater 23;
an outlet of the boiler superheater 3 is sequentially connected with an inlet of the main steam control valve 5 and an inlet of the high-pressure cylinder 6, and an outlet of the high-pressure cylinder 6 is connected with an inlet of the boiler reheater 4; the outlet of the boiler reheater 4 is sequentially connected with the reheat steam control valve 7 and the inlet of the intermediate pressure cylinder 8; the outlet of the intermediate pressure cylinder 8 is connected with the inlet of the low pressure cylinder 9; the low-pressure cylinder 9 is connected with the generator 10 through a shaft; the outlet of the low pressure cylinder 9 is sequentially connected with the condenser 12, the condensate pump 13, the first regenerative heater 14, the second regenerative heater 15, the third regenerative heater 16, the deaerator 20 and the feed pump unit 19; and the outlet of the feed pump set 19 is sequentially connected with the No. 4 regenerative heater 21, the No. 5 regenerative heater 22, the No. 6 regenerative heater 23 and the inlet of the boiler superheater 3.
The middle stage and the last stage of the high-pressure cylinder 6 are respectively connected with the steam side inlets of the No. 6 regenerative heater 23 and the No. 5 regenerative heater 22; the middle stage of the intermediate pressure cylinder 8 is connected with the No. 4 regenerative heater 21, the last stage of the intermediate pressure cylinder 8 is respectively connected with the steam side inlet of the deaerator 20 and the first stop valve 18, and the first stop valve 18 is connected with the auxiliary steam header 17; the middle stage of the low pressure cylinder 9 is respectively connected with the steam side inlets of the No. 3 regenerative heater 16, the No. 2 regenerative heater 15 and the No. 1 regenerative heater 14; the No. 6 regenerative heater 23 is connected with the No. 5 regenerative heater 22, the No. 4 regenerative heater 21 and the deaerator 20 in sequence; the No. 3 regenerative heater 16 is sequentially connected with the No. 2 regenerative heater 15, the No. 1 regenerative heater 14 and the condenser 13;
the high-temperature molten salt is multi-element mixed inorganic salt, and the use temperature range is 150-800 ℃.
FIG. 2 is a schematic diagram of the operation flow of load reduction and peak regulation of the unit of the invention:
the boiler superheater 3 generates steam, and the steam sequentially passes through a main steam control valve 5, a high-pressure cylinder 6, a boiler reheater 4, a reheated steam control valve 7, an intermediate pressure cylinder 8, a low-pressure cylinder 9, a condenser 12, a condensate pump 13, a first reheater 14, a second reheater 15, a third reheater 16, a deaerator 20, a feed pump unit 19, a fourth reheater 21, a fifth reheater 22, a sixth reheater 23 and the boiler superheater 3 according to the operation mode of a traditional thermal power generation system; the electric switch 11 is closed, the generator 10 is connected with the molten salt motor heater 29, the low-temperature molten salt storage tank 27 is connected with the low-temperature molten salt pump 28, and the low-temperature molten salt is heated by the molten salt motor heater 29 and enters the high-temperature molten salt storage tank 30; the process is a load reduction and peak regulation process of the unit.
FIG. 3 is a schematic diagram of the unit load-lifting peak-shaving process of the present invention:
the boiler superheater 3 generates steam, and the steam sequentially passes through a main steam control valve 5, a high-pressure cylinder 6, a boiler reheater 4, a reheated steam control valve 7, an intermediate pressure cylinder 8, a low-pressure cylinder 9, a condenser 12, a condensate pump 13, a first reheater 14, a second reheater 15, a third reheater 16, a deaerator 20, a feed pump unit 19, a fourth reheater 21, a fifth reheater 22, a sixth reheater 23 and the boiler superheater 3 according to the operation mode of a traditional thermal power generation system; the high-temperature molten salt in the high-temperature molten salt storage tank 30 sequentially passes through a high-temperature molten salt pump 31, a superheater 24, an evaporator 25 and a preheater 26 to heat low-temperature desalted water into superheated steam, an outlet of the superheater 24 is an interface 35 connected with the traditional thermal power generation system 1 and is divided into two paths, and the superheated steam is sequentially connected with the interface 35, a third stop valve 33, a steam regulating valve 34 and an inlet of the low-pressure cylinder 9 to provide steam to increase the generated energy; the process is a unit load-rising peak regulation process.
FIG. 4 is a schematic flow diagram of a molten salt heat storage system replacing an emergency start boiler system according to the present invention:
the boiler superheater 3 generates steam, and the steam sequentially passes through a main steam control valve 5, a high-pressure cylinder 6, a boiler reheater 4, a reheated steam control valve 7, an intermediate pressure cylinder 8, a low-pressure cylinder 9, a condenser 12, a condensate pump 13, a first reheater 14, a second reheater 15, a third reheater 16, a deaerator 20, a feed pump unit 19, a fourth reheater 21, a fifth reheater 22, a sixth reheater 23 and the boiler superheater 3 according to the operation mode of a traditional thermal power generation system; the high-temperature molten salt in the high-temperature molten salt storage tank 30 sequentially passes through a high-temperature molten salt pump 31, a superheater 24, an evaporator 25 and a preheater 26, low-temperature desalted water is heated into superheated steam, an outlet of the superheater 24 is a connector 35 connected with the traditional thermal power generation system 1 and is divided into two paths, and the superheated steam is sequentially connected with the connector 35, a second stop valve 32 and an auxiliary steam header 17 to provide shaft seal air supply; the above process is an alternative start-up boiler system process.
The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All the simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application belong to the protection scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.
Claims (4)
1. The utility model provides a fused salt heat-retaining peak shaving and replace and start boiler system, includes traditional thermal power system (1) and fused salt heat-retaining peak shaving and replaces start boiler system (2), its characterized in that: the fused salt heat storage peak regulation and alternative start boiler system (2) is integrated with the traditional thermal power generation system (1) through an interface (35);
fused salt heat storage peak shaving and alternative start boiler system (2) includes: the system comprises an electric switch (11), a superheater (24), an evaporator (25), a preheater (26), a low-temperature molten salt storage tank (27), a low-temperature molten salt pump (28), a molten salt electric heater (29), a high-temperature molten salt storage tank (30), a high-temperature molten salt pump (31), a second stop valve (32), a third stop valve (33), a steam regulating valve (34) and an interface (35);
the front end of the electric switch (11) is connected with a generator (10) of the traditional thermal power generation system (1), and the rear end is connected with a fused salt electric heater (29) of the fused salt heat storage peak regulation and alternative start boiler system (2); the low-temperature molten salt storage tank (27) is connected with a low-temperature molten salt pump (28), a molten salt electric heater (29) and a high-temperature molten salt storage tank (30) to form a load reduction and peak regulation system;
the high-temperature molten salt storage tank (30) is sequentially connected with a high-temperature molten salt pump (31), a superheater (24), an evaporator (25), a preheater (26) and a low-temperature molten salt storage tank (27); the preheater (26) is connected with the water sides of the evaporator (25) and the superheater (24) in sequence; the outlet of the superheater (24) is provided with an interface (35) connected with the traditional thermal power generation system (1), and is divided into two paths, wherein one path of the interface is sequentially connected with a third stop valve (33) and a steam regulating valve (34) and enters a low-pressure cylinder of the traditional thermal power generation system (1) to form a load-lifting peak-shaving system; the other path is connected with a second stop valve (32) and an auxiliary steam header (17) in sequence to form a boiler system for replacing starting.
2. The molten salt heat storage peak shaving and alternative start boiler system according to claim 1, characterized in that the conventional thermal power generation system (1) comprises: the system comprises a boiler superheater (3), a boiler reheater (4), a main steam control valve (5), a high-pressure cylinder (6), a reheated steam control valve (7), an intermediate pressure cylinder (8), a low-pressure cylinder (9), a generator (10), a condenser (12), a condensate pump (13), a first regenerative heater (14), a second regenerative heater (15), a third regenerative heater (16), an auxiliary steam header (17), a first stop valve (18), a water feed pump set (19), a deaerator (20), a fourth regenerative heater (21), a fifth regenerative heater (22) and a sixth regenerative heater (23);
an outlet of the boiler superheater (3) is sequentially connected with a main steam control valve (5) and an inlet of a high-pressure cylinder (6), and an outlet of the high-pressure cylinder (6) is connected with an inlet of a boiler reheater (4); the outlet of the boiler reheater (4) is sequentially connected with a reheat steam control valve (7) and the inlet of an intermediate pressure cylinder (8); the outlet of the intermediate pressure cylinder (8) is connected with the inlet of the low pressure cylinder (9); the low-pressure cylinder (9) is connected with the generator (10) through a shaft; the outlet of the low pressure cylinder (9) is sequentially connected with a condenser (12), a condensate pump (13), a first regenerative heater (14), a second regenerative heater (15), a third regenerative heater (16), a deaerator (20) and a water feed pump set (19); an outlet of the water feed pump set (19) is sequentially connected with a fourth regenerative heater (21), a fifth regenerative heater (22), a sixth regenerative heater (23) and an inlet of a boiler superheater (3);
the middle stage and the last stage of the high-pressure cylinder (6) are respectively connected with the steam side inlets of a sixth regenerative heater (23) and a fifth regenerative heater (22); the middle stage of the intermediate pressure cylinder (8) is connected with a fourth regenerative heater (21), the last stage of the intermediate pressure cylinder (8) is respectively connected with a steam side inlet of a deaerator (20) and a first stop valve (18), and the first stop valve (18) is connected with an auxiliary steam header (17); the middle stage of the low pressure cylinder (9) is respectively connected with the steam side inlets of the third regenerative heater (16), the second regenerative heater (15) and the first regenerative heater (14); the sixth regenerative heater (23) is connected with the fifth regenerative heater (22), the fourth regenerative heater (21) and the deaerator (20) in sequence; the third regenerative heater (16) is sequentially connected with the second regenerative heater (15), the first regenerative heater (14) and the condenser (13).
3. The molten salt heat storage peak shaving and alternative start boiler system according to claim 1, characterized in that: the high-temperature molten salt is multi-element mixed inorganic salt and has the use temperature range of 150-800 ℃.
4. The fused salt heat storage peak shaving and alternative start boiler system according to claim 1, the use method thereof is as follows:
when the unit operation meets the power grid load requirement, the traditional thermal power generation system (1) normally works, and the fused salt heat storage peak shaving and boiler system (2) alternative starting quit the operation;
when the unit is in the load reduction and peak regulation process, the electric switch (11) is closed, the traditional thermal power generation operation system and the load reduction and peak regulation system operate, the redundant electric quantity generated by the generator (10) heats the molten salt through the molten salt electric heater (29), and the electric energy is stored in the high-temperature molten salt storage tank (30) in the form of heat energy;
when a unit is in a load-lifting process, a traditional thermal power generation operation system and a load-lifting peak-shaving system operate, high-temperature molten salt in a high-temperature molten salt storage tank (30) is used for heating demineralized water in a preheater (26), an evaporator (25) and a superheater (24) to generate superheated steam, the superheated steam enters a low-pressure cylinder of a steam turbine, the steam flow in the steam turbine is increased, and the release of the heat of the molten salt and the lifting of the unit load are realized;
when the unit is started for the first time after shutdown, the starting boiler system is started instead, high-temperature molten salt in the high-temperature molten salt storage tank (30) is used for heating demineralized water in the preheater (26), the evaporator (25) and the superheater (24) to generate superheated steam, the superheated steam enters the auxiliary steam header (17), steam is supplied for the shaft seal, and the starting condition of the unit is met.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592933A (en) * | 2022-03-21 | 2022-06-07 | 西安热工研究院有限公司 | Combined molten salt energy storage and peak regulation system and method utilizing exhaust steam of intermediate pressure cylinder to store heat |
| CN115076678A (en) * | 2022-05-13 | 2022-09-20 | 华电电力科学研究院有限公司 | Combined cycle coupling fused salt energy storage deep peak regulation system and method thereof |
| CN116202352A (en) * | 2023-03-07 | 2023-06-02 | 中国电力工程顾问集团有限公司 | Fused salt heat accumulation and thermal power unit coupling peak shaving system |
| CN117432490A (en) * | 2023-09-27 | 2024-01-23 | 华能核能技术研究院有限公司 | Nuclear power unit coupling fused salt energy storage power generation system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN110006026A (en) * | 2019-04-18 | 2019-07-12 | 北京工业大学 | A kind of thermal power plant's depth peak regulation system |
| CN110966588A (en) * | 2019-12-20 | 2020-04-07 | 浙江大学 | Boiler-steam turbine load adjusting system and method based on heat storage |
| CN112855293A (en) * | 2021-01-19 | 2021-05-28 | 西安交通大学 | Integrated heat storage industrial steam supply cogeneration peak shaving frequency modulation system and operation method |
| CN113669715A (en) * | 2021-10-22 | 2021-11-19 | 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 |
-
2021
- 2021-12-07 CN CN202111482290.4A patent/CN114151777A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN110006026A (en) * | 2019-04-18 | 2019-07-12 | 北京工业大学 | A kind of thermal power plant's depth peak regulation system |
| CN110966588A (en) * | 2019-12-20 | 2020-04-07 | 浙江大学 | Boiler-steam turbine load adjusting system and method based on heat storage |
| CN112855293A (en) * | 2021-01-19 | 2021-05-28 | 西安交通大学 | Integrated heat storage industrial steam supply cogeneration peak shaving frequency modulation system and operation method |
| CN113669715A (en) * | 2021-10-22 | 2021-11-19 | 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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592933A (en) * | 2022-03-21 | 2022-06-07 | 西安热工研究院有限公司 | Combined molten salt energy storage and peak regulation system and method utilizing exhaust steam of intermediate pressure cylinder to store heat |
| CN114592933B (en) * | 2022-03-21 | 2023-05-02 | 西安热工研究院有限公司 | Combined molten salt energy storage peak shaving system and method utilizing exhaust steam and heat storage of medium-pressure cylinder |
| CN115076678A (en) * | 2022-05-13 | 2022-09-20 | 华电电力科学研究院有限公司 | Combined cycle coupling fused salt energy storage deep peak regulation system and method thereof |
| CN116202352A (en) * | 2023-03-07 | 2023-06-02 | 中国电力工程顾问集团有限公司 | Fused salt heat accumulation and thermal power unit coupling peak shaving system |
| CN116202352B (en) * | 2023-03-07 | 2023-08-11 | 中国电力工程顾问集团有限公司 | Fused salt heat accumulation and thermal power unit coupling peak shaving system |
| CN117432490A (en) * | 2023-09-27 | 2024-01-23 | 华能核能技术研究院有限公司 | Nuclear power unit coupling fused salt energy storage power generation system |
| CN117432490B (en) * | 2023-09-27 | 2024-06-04 | 华能核能技术研究院有限公司 | Nuclear power unit coupling fused salt energy storage power generation system |
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