CN113551212A - Fused salt energy storage power station system - Google Patents
Fused salt energy storage power station system Download PDFInfo
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- CN113551212A CN113551212A CN202111039786.4A CN202111039786A CN113551212A CN 113551212 A CN113551212 A CN 113551212A CN 202111039786 A CN202111039786 A CN 202111039786A CN 113551212 A CN113551212 A CN 113551212A
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- 150000003839 salts Chemical class 0.000 title claims abstract description 153
- 238000004146 energy storage Methods 0.000 title claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000010248 power generation Methods 0.000 claims abstract description 13
- 239000012943 hotmelt Substances 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 4
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008844 regulatory mechanism Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/028—Steam generation using heat accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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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
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a molten salt energy storage power station system which comprises a cold molten salt tank, a cold molten salt pump, a vapor-liquid heat exchanger, a hot molten salt tank, a hot molten salt pump, a heat exchanger group, a steam turbine generator set and a boiler, wherein the cold molten salt tank is connected with the cold molten salt pump; the cold molten salt tank, the cold molten salt pump, the vapor-liquid heat exchanger, the hot molten salt tank, the hot molten salt pump and the heat exchanger group are sequentially connected; the boiler is connected with the vapor-liquid heat exchanger so that the vapor provided by the boiler heats the molten salt passing through the vapor-liquid heat exchanger; and high-pressure feed water is converted into steam through the heat exchanger set and then supplied to the steam turbine generator set for power generation. The invention provides the fused salt energy storage power station system which is high in flexibility of units, high in frequency modulation performance, wide in unit load adjustment range, high in power generation efficiency, high in safety reliability and high in economical efficiency.
Description
The present application claims priority from the' 202110436782.3 patent application (the filing date of the prior application is 2021, 4 and 22, entitled molten salt energy storage power plant system).
Technical Field
The invention relates to the technical field of power generation, in particular to a molten salt energy storage power station system.
Background
With the increasing energy demand and the reduction of traditional petrochemical resources, new energy power generation such as wind power, photovoltaic and hydropower is rapidly developed. However, the new energy power generation system is greatly influenced by external environmental factors, and the phenomena of wind and light abandonment are serious, so that great impact is caused on the stability of power grid load and frequency response, and the large-scale internet access of new energy is influenced. And the peak regulation mechanism of the existing power station can not meet the new requirement of the power grid on the flexibility of the power side, and the existing power station can not realize the flexible operation of the unit under any load.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention aims to provide a fused salt energy storage power station system which is high in unit flexibility, high in frequency modulation performance, wide in unit load adjustment range, high in power generation efficiency, high in safety reliability and high in economical efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
a molten salt energy storage power station system comprises a cold molten salt tank, a cold molten salt pump, a vapor-liquid heat exchanger, a hot molten salt tank, a hot molten salt pump, a heat exchanger group, a steam turbine generator set and a boiler;
the cold molten salt tank, the cold molten salt pump, the vapor-liquid heat exchanger, the hot molten salt tank, the hot molten salt pump and the heat exchanger group are sequentially connected;
the boiler is connected with the vapor-liquid heat exchanger so that the vapor provided by the boiler heats the molten salt passing through the vapor-liquid heat exchanger;
and high-pressure feed water is converted into steam through the heat exchanger set and then supplied to the steam turbine generator set for power generation.
As an alternative of the above molten salt energy storage power station system, the heat exchanger group includes a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger; the second heat exchanger, the third heat exchanger and the fourth heat exchanger are connected in series, and the first heat exchanger is connected with the second heat exchanger in parallel;
the steam turbine generator set comprises a high-pressure cylinder and a medium-low pressure cylinder, high-pressure feed water sequentially passes through the second heat exchanger, the third heat exchanger and the fourth heat exchanger and then is conveyed to the high-pressure cylinder, and steam coming out of the high-pressure cylinder flows through the first heat exchanger and then is conveyed to the medium-low pressure cylinder.
As an alternative of the above molten salt energy storage power station system, the exhaust steam of the medium-low pressure cylinder enters the second heat exchanger after passing through the condenser and the heat recovery system.
As an alternative of the above molten salt energy storage power station system, a superheater is arranged in the boiler, and the superheater is connected with the vapor-liquid heat exchanger, so that superheated steam at an outlet of the superheater is delivered to the vapor-liquid heat exchanger.
As an alternative of the above molten salt energy storage power station system, an economizer is arranged in the boiler, and the vapor-liquid heat exchanger is connected to the economizer through a high-pressure pump, so that water discharged by the vapor-liquid heat exchanger flows back into the boiler through the high-pressure pump and the economizer.
As an alternative of the above molten salt energy storage power station system, an in-furnace heat exchanger is arranged in the boiler, and the in-furnace heat exchanger is connected with the vapor-liquid heat exchanger and the hot-melt salt tank, so that the molten salt in the vapor-liquid heat exchanger flows through the in-furnace heat exchanger and then flows to the hot-melt salt tank.
As an alternative of the above molten salt energy storage power station system, the in-furnace heat exchanger includes a hearth radiation section heat exchanger, a low-temperature convection section heat exchanger and a high-temperature convection section heat exchanger, and the hearth radiation section heat exchanger, the low-temperature convection section heat exchanger and the high-temperature convection section heat exchanger are connected in series and are respectively arranged at different positions of the boiler.
As an alternative to the above molten salt energy storage power station system, the steam turbine generator set further includes a generator, and the generator is connected to the high-pressure cylinder and the medium-low pressure cylinder, so that the high-pressure cylinder and the medium-low pressure cylinder drive the generator to generate electricity.
As an alternative of the molten salt energy storage power station system, the rear end of the hot molten salt tank is provided with a valve.
As an alternative to the above molten salt energy storage power station system, the amount of hot molten salt entering the heat exchanger group is controlled by the valve, so as to control the amount of hot molten salt entering the heat exchanger group according to the load of the steam turbine generator set.
As an alternative to the above molten salt energy storage power station system, the opening of the valve can be adjusted from zero to one hundred percent.
The invention has the advantages that: the steam used by the steam turbine generator set is completely generated by heating molten salt, the flexibility of the turbine generator set is not influenced by the operation of a boiler, and the frequency modulation performance of the turbine generator set is improved. Because the steam used by the steam turbine generator set is generated by heating the molten salt in the hot-melt salt tank, the load of the steam turbine generator set can be adjusted from zero to one hundred percent, the heat supply can be controlled only by adjusting the valve of the hot-melt salt tank according to the load requirement, and the load of the steam turbine generator set can be adjusted from zero to one hundred percent. The molten salt energy storage power station system can improve the equipment utilization rate, the power generation efficiency, the safety and the reliability and the economical efficiency of the unit.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a molten salt energy storage power station system in the invention.
In the figure:
100. a heat exchanger group; 200. a steam turbine generator set; 1. a cold molten salt tank; 2. a cold molten salt pump; 3. a vapor-liquid heat exchanger; 4. a heat exchanger inside the furnace; 5. a hot-melt salt tank; 6. a hot-melt salt pump; 7. a first heat exchanger; 8. a second heat exchanger; 9. a third heat exchanger; 10. a fourth heat exchanger; 11. a boiler; 12. a superheater; 13. a coal economizer; 14. a high pressure cylinder; 15. a medium-low pressure cylinder; 16. a generator; 17. a high pressure pump.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The invention provides a molten salt energy storage power station system, and fig. 1 is a schematic structural diagram of an embodiment of the molten salt energy storage power station system, and as shown in fig. 1, the molten salt energy storage power station system comprises a cold molten salt tank 1, a cold molten salt pump 2, a vapor-liquid heat exchanger 3, a hot molten salt tank 5, a hot molten salt pump 6, a heat exchanger group 100, a steam turbine generator set 200 and a boiler 11. The cold molten salt tank 1, the cold molten salt pump 2, the vapor-liquid heat exchanger 3, the hot molten salt tank 5, the hot molten salt pump 6 and the heat exchanger group 100 are connected in sequence to form a molten salt system circulation. As shown in fig. 1, liquid water from high pressure feed water is heated into steam by a heat exchanger group 100 and supplied to a steam turbine generator set 200 for power generation, and the liquid water can be sent from a high pressure inlet of a power station No. 1. The boiler 11 is connected to the vapor-liquid heat exchanger 3 so that the molten salt passing through the vapor-liquid heat exchanger 3 is heated by the steam supplied from the boiler 11.
During molten salt energy storage power station system work, the microthermal cold molten salt in the cold molten salt jar 1 is gone into vapour liquid heat exchanger 3 by cold molten salt pump 2 pump, steam in the boiler 11 lets in vapour liquid heat exchanger 3, heat cold molten salt, the molten salt after being heated gets into hot molten salt jar 5 in the vapour liquid heat exchanger 3, store in hot molten salt jar 5, then hot molten salt pump income heat exchanger group 100 in with hot molten salt jar 5 through hot molten salt pump 6, with the high pressure feedwater heating become steam supply and give turbine generator set 200 power generation, hot molten salt becomes cold molten salt after heat exchanger group 100, get back to in the cold molten salt jar 1.
In the invention, the steam used by the steam turbine generator set 200 is completely generated by heating the molten salt without being provided by the boiler 11, the flexibility of the generator set is not influenced by the operation of the boiler 11, and the frequency modulation performance of the generator set is improved. Because the steam used by the steam turbine generator set 200 is generated by heating the molten salt in the hot-melt salt tank 5, the load of the steam turbine generator set 200 can be adjusted from zero to one hundred percent, and the heat supply can be controlled only by adjusting the valve of the hot-melt salt tank 5 according to the load requirement, so that the load of the steam turbine generator set 200 can be adjusted from zero to one hundred percent. The molten salt energy storage power station system can improve the equipment utilization rate, the power generation efficiency, the safety and the reliability and the economical efficiency of the unit.
In addition, the high-temperature molten salt has the advantages of good heat transfer performance, low working pressure, wide liquid temperature range, high use temperature, low cost, safety, reliability and the like, and is a high-temperature heat transfer and storage working medium with great prospect.
In an embodiment, a valve is arranged on a pipeline at the rear end of the hot-melt salt tank 5, or a valve is directly arranged on the hot-melt salt tank 5, the amount of hot-melt salt entering the heat exchanger group 100 is controlled by the valve, so that the amount of hot-melt salt entering the heat exchanger group 100 can be controlled according to the load of the steam turbine generator set 200, the opening degree of the valve can be adjusted from zero to one hundred percent, and the load of the steam turbine generator set 200 can be adjusted from zero to one hundred percent.
In one embodiment, as shown in fig. 1, the heat exchanger group 100 includes a first heat exchanger 7, a second heat exchanger 8, a third heat exchanger 9, and a fourth heat exchanger 10, where the second heat exchanger 8, the third heat exchanger 9, and the fourth heat exchanger 10 are connected in series, that is, the second heat exchanger 8, the third heat exchanger 9, and the fourth heat exchanger 10 are connected in series, and the first heat exchanger 7 is connected in parallel with the second heat exchanger 8. As shown in fig. 1, the molten salt inlets of the first heat exchanger 7 and the second heat exchanger 8 are both connected to the rear end of the hot-melt salt pump 6, and the molten salt outlets of the first heat exchanger 7 and the second heat exchanger 8 are connected to the molten salt inlet of the third heat exchanger 9 after being converged, that is, the molten salts of the first heat exchanger 7 and the second heat exchanger 8 are mixed and then enter the third heat exchanger 9, and the molten salt passing through the third heat exchanger 9 enters the fourth heat exchanger 10.
Referring to fig. 1, the steam turbine generator set 200 includes a high pressure cylinder 14 and a medium pressure cylinder 15, and the high pressure cylinder 14 and the medium pressure cylinder 15 are conventional components of the steam turbine generator set 200 and are not described herein again. The liquid water sequentially passes through the second heat exchanger 8, the third heat exchanger 9 and the fourth heat exchanger 10 to form steam, the steam enters the high-pressure cylinder 14 to push an impeller in the high-pressure cylinder 14 to generate power, and as shown in fig. 1, the steam coming out of the high-pressure cylinder 14 enters the first heat exchanger 7 and then is conveyed to the medium-low pressure cylinder 15 to push the impeller in the medium-low pressure cylinder 15 to generate power. In addition, the exhaust steam of the medium and low pressure cylinder 15 passes through a condenser and a regenerative system to the second heat exchanger 8.
In one embodiment, a superheater 12 is disposed in the boiler 11, and the superheater 12 is connected to the vapor-liquid heat exchanger 3, so that superheated steam at an outlet of the superheater 12 enters the vapor-liquid heat exchanger 3 to heat the cold molten salt in the vapor-liquid heat exchanger 3.
In one embodiment, as shown in fig. 1, the water discharged from the vapor-liquid heat exchanger 3 is returned to the boiler 11, so as to save resources and improve energy utilization rate.
In an embodiment, an economizer 13 is further disposed in the boiler 11, and the vapor-liquid heat exchanger 3 is connected to the economizer 13 through a high-pressure pump 17, so that water discharged from the vapor-liquid heat exchanger 3 flows back into the boiler 11 through the high-pressure pump 17 and the economizer 13 to form an in-boiler water-steam circulation system. The circulation process of the whole in-furnace water-steam circulation system is as follows: superheated steam at the outlet of the superheater 12 in the boiler 11 enters the vapor-liquid heat exchanger 3, is cooled by the vapor-liquid heat exchanger 3 and then enters the economizer 13 in the boiler 11, and the circulation process is completed.
In an embodiment, an in-furnace heat exchanger 4 is further disposed in the boiler 11, and the in-furnace heat exchanger 4 is connected to the vapor-liquid heat exchanger 3 and the hot-melt salt tank 5, so that the molten salt in the vapor-liquid heat exchanger 3 flows through the in-furnace heat exchanger 4 and then flows to the hot-melt salt tank 5. Of course, the molten salt in the vapor-liquid heat exchanger 3 may be directly flowed into the hot-molten salt tank 5 without providing the in-furnace heat exchanger 4. The arrangement of the heat exchanger 4 in the boiler can improve the utilization rate of energy and fully utilize the heat in the boiler 11 to further heat the molten salt. That is, the molten salt is heated by the vapor-liquid heat exchanger 3 and then flows to the in-furnace heat exchanger 4 in the boiler 11 to be further heated.
In an embodiment, the heat exchanger 4 in the furnace comprises a hearth radiation section heat exchanger, a low-temperature convection section heat exchanger and a high-temperature convection section heat exchanger, the hearth radiation section heat exchanger, the low-temperature convection section heat exchanger and the high-temperature convection section heat exchanger are connected in series and are respectively arranged at different positions of the boiler 11, different heat exchangers are arranged according to different positions of the boiler 11, the heat exchangers are adapted to different positions in the boiler 11, and the heat exchange efficiency is improved.
Referring to fig. 1, the steam turbine generator set 200 further includes an electric generator 16, and the electric generator 16 is connected to the high pressure cylinder 14 and the medium pressure and low pressure cylinder 15, so that the high pressure cylinder 14 and the medium pressure and low pressure cylinder 15 drive the electric generator 16 to generate electricity, and when the impeller of the high pressure cylinder 14 and the medium pressure and low pressure cylinder 15 is driven by steam to rotate, the impeller can drive the electric generator 16 to generate electricity.
The molten salt energy storage power station system improves the absorption capacity of new energy, can effectively reduce the phenomena of wind and light abandonment, avoids resource waste, relieves peak regulation pressure, and supports large-scale power generation and grid connection of the new energy. The molten salt energy storage power station system is beneficial to structural configuration of the power supply side of the power system and planning, operation and control of the power system, and provides guarantee for flexible, safe and stable operation of the power system.
The working process of the molten salt energy storage power station system comprises the following steps:
cold molten salt with the temperature of 290 ℃ is pumped into a vapor-liquid heat exchanger 3 from a cold molten salt tank 1 through a cold molten salt pump 2 to absorb the heat of the superheated steam, then enters a furnace heat exchanger 4 to be further heated to 550 ℃ by flue gas, enters a hot molten salt tank 5, and the molten salt absorbs the redundant heat of a boiler 11 to finish the energy storage process;
when the steam turbine generator set 200 is under a low load, only a small part of hot molten salt in the hot molten salt tank 5 enters the heat exchanger group 100 to heat steam required by the steam turbine generator set 200, the hot molten salt is respectively pumped into the first heat exchanger 7 and the second heat exchanger 8 through the hot molten salt pump 6 from the hot molten salt tank 5 to exchange heat, the molten salt after passing through the first heat exchanger 7 and the molten salt after passing through the second heat exchanger 8 are mixed and then enter the third heat exchanger 9 and the fourth heat exchanger 10 to exchange heat, and the molten salt enters the cold molten salt tank 1 after the temperature is reduced to 290 ℃ to complete the heating steam energy release process; the feed water at the No. 1 high pressure inlet is preheated in the second heat exchanger 8, enters the third heat exchanger 9 to complete the evaporation process, finally enters the high pressure cylinder 14 to apply work after the fourth heat exchanger 10 completes the overheating process, and the cold steam enters the medium and low pressure cylinder 15 to apply work after being heated by the first heat exchanger 7 and then enters the heat recovery system through the condenser to complete the circulation process.
When the steam turbine generator set 200 is under high load, more hot molten salt in the hot molten salt tank 5 enters the heat exchanger set 100, the feed water of the 1 st high pressure outlet is heated through the first heat exchanger 7, the second heat exchanger 8, the third heat exchanger 9 and the fourth heat exchanger 10, so that the steam turbine generator set 200 generates power, the specific heat exchange and molten salt circulation processes are the same as those of the steam turbine generator set 200 in the previous section under low load, and no further description is given here, only the valve opening degrees of the hot molten salt tank 5 are different between under low load and under high load, so that the hot molten salt amount entering the heat exchanger set 100 is different, and the power grid peak regulation task is completed.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (11)
1. A molten salt energy storage power station system is characterized by comprising a cold molten salt tank (1), a cold molten salt pump (2), a vapor-liquid heat exchanger (3), a hot molten salt tank (5), a hot molten salt pump (6), a heat exchanger group (100), a steam turbine generator set (200) and a boiler (11);
the cold molten salt tank (1), the cold molten salt pump (2), the vapor-liquid heat exchanger (3), the hot molten salt tank (5), the hot molten salt pump (6) and the heat exchanger group (100) are connected in sequence;
the boiler (11) is connected with the vapor-liquid heat exchanger (3) so that the molten salt passing through the vapor-liquid heat exchanger (3) is heated by the steam provided by the boiler (11);
and high-pressure feed water is changed into steam through the heat exchanger group (100) and then supplied to the steam turbine generator set (200) for power generation.
2. The molten salt energy storage power station system of claim 1 characterized in that the heat exchanger group (100) comprises a first heat exchanger (7), a second heat exchanger (8), a third heat exchanger (9) and a fourth heat exchanger (10); the second heat exchanger (8), the third heat exchanger (9) and the fourth heat exchanger (10) are connected in series, and the first heat exchanger (7) and the second heat exchanger (8) are connected in parallel;
the steam turbine generator set (200) comprises a high-pressure cylinder (14) and a medium-low pressure cylinder (15), high-pressure feed water sequentially passes through the second heat exchanger (8), the third heat exchanger (9) and the fourth heat exchanger (10) and then is conveyed to the high-pressure cylinder (14), and steam coming out of the high-pressure cylinder (14) flows through the first heat exchanger (7) and then is conveyed to the medium-low pressure cylinder (15).
3. The molten salt energy storage power station system of claim 2, characterized in that the exhaust steam of the medium and low pressure cylinder (15) enters the second heat exchanger (8) after passing through a condenser and a regenerative system.
4. The molten salt energy storage power station system as claimed in claim 1, characterized in that a superheater (12) is arranged in the boiler (11), the superheater (12) being connected with the vapor-liquid heat exchanger (3) so that superheated steam at the outlet of the superheater (12) is delivered to the vapor-liquid heat exchanger (3).
5. The molten salt energy storage power station system of claim 4, characterized in that an economizer (13) is provided in the boiler (11), and the vapour-liquid heat exchanger (3) is connected to the economizer (13) by a high-pressure pump (17) so that water discharged from the vapour-liquid heat exchanger (3) flows back into the boiler (11) through the high-pressure pump and the economizer (13).
6. The molten salt energy storage power station system as claimed in claim 1, characterized in that an in-furnace heat exchanger (4) is arranged in the boiler (11), and the in-furnace heat exchanger (4) is connected with the vapor-liquid heat exchanger (3) and the hot-melt salt tank (5) so that the molten salt in the vapor-liquid heat exchanger (3) flows to the hot-melt salt tank (5) after flowing through the in-furnace heat exchanger (4).
7. The molten salt energy storage power station system of claim 6, characterized in that the in-furnace heat exchangers (4) comprise furnace radiant section heat exchangers, low temperature convection section heat exchangers and high temperature convection section heat exchangers, which are connected in series and are respectively located at different positions of the boiler (11).
8. The molten salt energy storage power station system of claim 2 characterized in that the steam turbine generator set (200) further comprises a generator (16), the generator (16) being connected with the high pressure cylinder (14) and the medium pressure and low pressure cylinder (15) so that the high pressure cylinder (14) and the medium pressure and low pressure cylinder (15) drive the generator (16) to generate electricity.
9. The molten salt energy storage power station system as claimed in claim 1, characterized in that the rear end of the hot molten salt tank (5) is provided with a valve.
10. The molten salt energy storage power station system of claim 9 characterized in that the amount of hot melt salt entering the heat exchanger bank (100) is controlled by the valve to control the amount of hot melt salt entering the heat exchanger bank (100) as a function of the load of the steam turbine generator set (200).
11. The molten salt energy storage power station system of claim 9 wherein the opening of the valve is adjustable from zero to one hundred percent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110436782.3A CN113028373A (en) | 2021-04-22 | 2021-04-22 | Fused salt energy storage power station system |
| CN2021104367823 | 2021-04-22 |
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| Publication Number | Publication Date |
|---|---|
| CN113551212A true CN113551212A (en) | 2021-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110436782.3A Withdrawn CN113028373A (en) | 2021-04-22 | 2021-04-22 | Fused salt energy storage power station system |
| CN202111039786.4A Pending CN113551212A (en) | 2021-04-22 | 2021-09-06 | Fused salt energy storage power station system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110436782.3A Withdrawn CN113028373A (en) | 2021-04-22 | 2021-04-22 | Fused salt energy storage power station system |
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|---|---|---|---|---|
| CN103511208A (en) * | 2013-09-25 | 2014-01-15 | 青海中控太阳能发电有限公司 | Molten salt steam generating system capable of variable load operation within full-parameter range |
| US20150089944A1 (en) * | 2012-03-19 | 2015-04-02 | Stamicarbon B.V. Acting Under The Name Of Mt Innovation Center | Back-up boiler system for a solar thermal power plant based on molten salt technology, a solar thermal power plant and a method for operating a solar thermal power plant |
| CN111288428A (en) * | 2020-04-09 | 2020-06-16 | 东方电气集团东方锅炉股份有限公司 | Fused salt electrode boiler heat-storage power generation system |
| CN211875979U (en) * | 2020-01-21 | 2020-11-06 | 山东三维石化工程股份有限公司 | Heat supply load adjusting system based on fused salt heat storage |
| CN112610292A (en) * | 2020-12-11 | 2021-04-06 | 北京前沿动力科技股份有限公司 | Deep peak regulation power generation system |
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2021
- 2021-04-22 CN CN202110436782.3A patent/CN113028373A/en not_active Withdrawn
- 2021-09-06 CN CN202111039786.4A patent/CN113551212A/en active Pending
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