CN218717027U - Power generation system utilizing supercritical carbon dioxide for heat storage and peak shaving - Google Patents
Power generation system utilizing supercritical carbon dioxide for heat storage and peak shaving Download PDFInfo
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- CN218717027U CN218717027U CN202222945642.1U CN202222945642U CN218717027U CN 218717027 U CN218717027 U CN 218717027U CN 202222945642 U CN202222945642 U CN 202222945642U CN 218717027 U CN218717027 U CN 218717027U
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Abstract
The utility model belongs to the technical field of the energy storage electricity generation, in particular to utilize power generation system of supercritical carbon dioxide heat-retaining peak shaving. The technical scheme is as follows: a power generation system utilizing supercritical carbon dioxide to store heat and regulate peak comprises a turbine, wherein the turbine is introduced with heat supply steam and is connected with a compression work system; still include steam power generation system, low temperature fused salt storage tank and high temperature fused salt storage tank, the compression work system includes the heat exchanger, is connected with the heat storage pipeline between the fused salt export of low temperature fused salt storage tank and the fused salt import of high temperature fused salt storage tank, and the heat storage pipeline passes the heat exchanger and absorbs the medium heat, is connected with exothermic pipeline between the fused salt export of high temperature fused salt storage tank and the fused salt import of low temperature fused salt storage tank, and exothermic pipeline passes steam generator and heats the medium. The utility model provides an utilize power generation system of supercritical carbon dioxide heat-retaining peak shaving.
Description
Technical Field
The utility model belongs to the technical field of the energy storage electricity generation, in particular to utilize power generation system of supercritical carbon dioxide heat-retaining peak shaving.
Background
Under the background of carbon neutralization, a plurality of scholars research a molten salt heat storage power generation system and develop a corresponding Carnot battery energy storage technology according to the research. For example, patent CN113659728a and patent CN113824139a store the redundant heat into the molten salt by charging and heating, and then heat the steam by high temperature appearance when the downstream needs electric energy, and then use the steam to drive the steam turbine to generate electricity, thereby completing the energy storage purpose of the high temperature molten salt, achieving the cycle of charging, storing heat and discharging, and realizing large-scale charging/discharging.
However, in the thermal power generation system, a large amount of energy is wasted in the condenser. The heat in the condenser taken away by the circulating water is about 2 times of the power generation capacity of the steam turbine, and finally the heat efficiency of the thermal power plant is less than 40%, so that huge energy waste is caused. In short, the heat generated by one-degree electricity, about 2-degree electricity, is dissipated in the air.
Therefore, the carnot battery can only play a role in peak regulation of a power plant to a certain extent, and as long as power generation and charging are involved, the waste of nearly 2 times of electric quantity is caused. If a regeneration system for discharging the Carnot battery is calculated, the efficiency of the whole battery is extremely low, and huge energy is converted into heat and wasted in the environment.
In order to effectively improve the energy utilization rate, the power generation link, especially the link of the condensed gas power generation, should be reduced fundamentally.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems existing in the prior art, an object of the present invention is to provide a power generation system utilizing supercritical carbon dioxide heat storage peak shaving.
The utility model discloses the technical scheme who adopts does:
a power generation system utilizing supercritical carbon dioxide to store heat and regulate peak comprises a turbine, wherein the turbine is introduced with heat supply steam and is connected with a compression work system; still include steam power generation system, low temperature fused salt storage tank and high temperature fused salt storage tank, the compression work system includes the heat exchanger, is connected with the heat storage pipeline between the fused salt export of low temperature fused salt storage tank and the fused salt import of high temperature fused salt storage tank, and the heat storage pipeline passes the heat exchanger and absorbs the medium heat, is connected with exothermic pipeline between the fused salt export of high temperature fused salt storage tank and the fused salt import of low temperature fused salt storage tank, and exothermic pipeline passes steam generator and heats the medium.
The heat exchanger of the compression acting system of the utility model directly heats the fused salt, thus realizing the direct storage of heat energy; the high temperature molten salt heats a medium in a steam generator of the steam power generation system and is used for generating power by a steam turbine. The system directly stores heat, does not have a charging link, and can directly heat the molten salt by using the steam heater, thereby realizing the more efficient utilization of energy. The utility model discloses a heat exchanger of compression acting unit heats the low temperature fused salt, heats the medium among the steam generator through the high temperature fused salt, has realized the purpose of heat-retaining peak shaving.
As the utility model discloses a preferred scheme, the compression system of doing work includes the compressor, and the compressor is connected with the turbine, and the export of compressor is passed through the pipeline and is connected with the heat exchanger, and the medium export of heat exchanger has the expander through the tube coupling, and the medium export of expander has the cooler through the tube coupling, and the import connection of pipeline and compressor is passed through in the export of cooler. After the medium is compressed by the compressor, the low-temperature molten salt is heated by the heat exchanger, so that heat is stored through the molten salt. The medium enters the expander to do work to the outside, and the medium after doing work returns to the compressor after being cooled by the cooler to form a medium loop. The utility model discloses with the fused salt of steam heater direct heating, realize the more efficient utilization of the energy.
As the preferred scheme of the utility model, be provided with the heat pump recoverer on the pipeline between heat exchanger and the expander, pipeline between cooler and the compressor is through the heat pump recoverer. In the heat pump recoverer, a high-temperature medium exchanges heat with a low-temperature medium.
As the preferable scheme of the utility model, the cooling medium in the cooler is circulating water.
As the preferred proposal of the utility model, the heat storage pipeline is also connected with a steam heater. The steam heater can also realize the direct utilization of heat energy to the heat storage of the molten salt.
As the preferred scheme of the utility model, the medium in the compression work system is carbon dioxide.
As the utility model discloses a preferred scheme, steam power generation system includes the feed pump, and the export of feed pump passes through the pipeline and is connected with steam generator, and steam generator's steam outlet has turbo generator through the tube coupling, and turbo generator's medium export has steam cooler through the tube coupling, and steam cooler's medium export is passed through the pipeline and is connected with the feed pump. The water pump pumps water into the steam generator, the high-temperature molten salt heats water in the steam generator and generates steam, and the steam is introduced into the steam turbine generator to generate electricity. And steam exhausted by the steam turbine generator enters a steam cooler for cooling, and cooling water returns to the water supply pump.
As the utility model discloses a preferred scheme, be provided with the heat engine recoverer on the pipeline between feed pump and the steam generator, pipeline between turbo generator and the steam cooler is through the heat engine recoverer. In the heat engine recoverer, the steam discharged by the steam turbine generator can heat the water sent by the water feeding pump, so that the utilization rate of the steam heat energy is improved.
As the preferable proposal of the utility model, the cooling medium in the steam cooler is circulating water.
The utility model has the advantages that:
the heat exchanger of the compression acting system of the utility model directly heats the fused salt, thus realizing the direct storage of heat energy; the high temperature molten salt heats a medium in a steam generator of the steam power generation system and is used for generating power by a steam turbine. The system directly stores heat, does not have a charging link, and can directly heat the molten salt by using the steam heater, thereby realizing the more efficient utilization of energy. The utility model discloses a heat exchanger of compression acting unit heats the low temperature fused salt, heats the medium among the steam generator through the high temperature fused salt, has realized the purpose of heat-retaining peak shaving.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-supplying heat steam; 2-a turbine; 3-a compressor; 4-a steam heater; 5-low temperature molten salt storage tank; 6-high temperature molten salt storage tank; 7-a heat exchanger; 8-heat pump recoverer; 9-an expander; 10-a cooler; 11-a feed pump; 12-a steam cooler; 13-heat engine recovery; 14-a steam generator; 15-a turbogenerator.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1, the power generation system using supercritical carbon dioxide for heat storage and peak shaving of the embodiment includes a turbine 2, wherein heat supply steam 1 is introduced into the turbine 2, and the turbine 2 is connected with a compression work system; still include steam power generation system, low temperature fused salt storage tank 5 and high temperature fused salt storage tank 6, the compression work system includes heat exchanger 7, is connected with the heat storage pipeline between the fused salt export of low temperature fused salt storage tank 5 and the fused salt import of high temperature fused salt storage tank 6, and the heat storage pipeline passes 7 absorption medium heats of heat exchanger, is connected with exothermic pipeline between the fused salt export of high temperature fused salt storage tank 6 and the fused salt import of low temperature fused salt storage tank 5, and exothermic pipeline passes steam generator 14 and heats the medium. And the heat storage pipeline is also connected with a steam heater 4.
The heat exchanger 7 of the compression work system of the utility model directly heats the fused salt, thus realizing the direct storage of heat energy; the high temperature molten salt heats a medium in a steam generator 14 of the steam power generation system and is used for steam turbine power generation. The system stores heat directly, does not have a charging link, and can directly heat fused salt by using the steam heater 4, thereby realizing more efficient utilization of energy. The steam heater 4 can also realize the direct utilization of heat energy to the heat storage of the molten salt. The utility model discloses a heat exchanger 7 of compression acting unit heats the low temperature fused salt, through the medium heating of high temperature fused salt in to steam generator 14, has realized the purpose of heat-retaining peak shaving.
Specifically, the compression work-doing system comprises a compressor 3, the compressor 3 is connected with a turbine 2, an outlet of the compressor 3 is connected with a heat exchanger 7 through a pipeline, a medium outlet of the heat exchanger 7 is connected with an expander 9 through a pipeline, a medium outlet of the expander 9 is connected with a cooler 10 through a pipeline, an outlet of the cooler 10 is connected with an inlet of the compressor 3 through a pipeline, and a cooling medium in the cooler 10 is circulating water. A heat pump recoverer 8 is arranged on a pipeline between the heat exchanger 7 and the expander 9, and a pipeline between the cooler 10 and the compressor 3 passes through the heat pump recoverer 8. Wherein, the medium in the compression work system is carbon dioxide. The carbon dioxide is compressed by the compressor 3 and then heated by the heat exchanger 7 to store heat through the molten salt. The carbon dioxide gas enters the expander 9 to do work to the outside, and the medium after doing work returns to the compressor 3 after being cooled by the cooler 10 to form a medium loop. In the heat pump recovery unit 8, a high-temperature medium exchanges heat with a low-temperature medium. The utility model discloses with 4 direct heating fused salts of steam heater, realize the more efficient utilization of the energy.
Specifically, steam power generation system includes feed pump 11, and the export of feed pump 11 is connected with steam generator 14 through the pipeline, and steam generator 14's steam outlet has turbo generator 15 through the pipe connection, and turbo generator 15's medium export has steam cooler 12 through the pipe connection, and steam cooler 12's medium export is connected with feed pump 11 through the pipeline, and the coolant in steam cooler 12 is the circulating water. A heat engine recoverer 13 is arranged on a pipeline between the feed water pump 11 and the steam generator 14, and a pipeline between the steam turbine generator 15 and the steam cooler 12 passes through the heat engine recoverer 13. The water pump pumps water into the steam generator 14, the high-temperature molten salt heats water in the steam generator 14 and generates steam, and the steam is introduced into the turbine generator 15 to generate electricity. The steam discharged from the steam turbine generator 15 enters the steam cooler 12 to be cooled, and the cooling water returns to the feed pump 11. In the heat engine recoverer 13, the steam discharged by the steam turbine generator 15 can heat the water sent by the water feeding pump 11, and the utilization rate of the steam heat energy is improved.
The steam power generation system is characterized in that a water feed pump 11 is used for supplying water to a heat engine recoverer 13, the water is heated by a steam generator 14, a turbine generator 15 driven by high-temperature and high-pressure steam generates power, and finally the steam returns to a steam cooler 12 to be cooled for recycling. The utility model discloses utilize rankine cycle and carnot cycle, realize heat energy direct storage, turn into the electric energy again at last. Different from the mainstream technology, the system directly stores heat, does not have a charging link, and can directly heat the molten salt by using the steam heater 4 to realize the more efficient utilization of energy.
The utility model discloses a technical application prospect: under the big background of carbon neutralization, this scheme cancellation carnot battery's the link of charging, utilizes steam drive compressor 3 to heating molten salt system can reduce the energy waste, effectual improvement energy storage efficiency.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (9)
1. A power generation system utilizing supercritical carbon dioxide to store heat and regulate peak is characterized in that: the device comprises a turbine (2), wherein heat supply steam (1) is introduced into the turbine (2), and the turbine (2) is connected with a compression work system; still include steam power generation system, low temperature fused salt storage tank (5) and high temperature fused salt storage tank (6), the compression work system includes heat exchanger (7), be connected with the heat storage pipeline between the fused salt export of low temperature fused salt storage tank (5) and the fused salt import of high temperature fused salt storage tank (6), the heat storage pipeline passes heat exchanger (7) and absorbs the medium heat, be connected with heat release pipeline between the fused salt export of high temperature fused salt storage tank (6) and the fused salt import of low temperature fused salt storage tank (5), heat release pipeline passes steam generator (14) and heats the medium.
2. The system of claim 1, wherein the system comprises: the compression work doing system comprises a compressor (3), the compressor (3) is connected with a turbine (2), an outlet of the compressor (3) is connected with a heat exchanger (7) through a pipeline, a medium outlet of the heat exchanger (7) is connected with an expansion machine (9) through a pipeline, a medium outlet of the expansion machine (9) is connected with a cooler (10) through a pipeline, and an outlet of the cooler (10) is connected with an inlet of the compressor (3) through a pipeline.
3. The system of claim 2, wherein the system comprises: a heat pump recoverer (8) is arranged on a pipeline between the heat exchanger (7) and the expander (9), and a pipeline between the cooler (10) and the compressor (3) passes through the heat pump recoverer (8).
4. The system of claim 2, wherein the system comprises: the cooling medium in the cooler (10) is circulating water.
5. The system of claim 1, wherein the system comprises: and the heat storage pipeline is also connected with a steam heater (4).
6. The system of claim 1, wherein the system comprises: the medium in the compression work system is carbon dioxide.
7. The system of claim 1, wherein the system comprises: the steam power generation system comprises a water feeding pump (11), the outlet of the water feeding pump (11) is connected with a steam generator (14) through a pipeline, the steam outlet of the steam generator (14) is connected with a steam turbine generator (15) through a pipeline, the medium outlet of the steam turbine generator (15) is connected with a steam cooler (12) through a pipeline, and the medium outlet of the steam cooler (12) is connected with the water feeding pump (11) through a pipeline.
8. The system of claim 7, wherein the system comprises: a heat engine recoverer (13) is arranged on a pipeline between the water feeding pump (11) and the steam generator (14), and a pipeline between the steam turbine generator (15) and the steam cooler (12) passes through the heat engine recoverer (13).
9. The system of claim 7, wherein the system comprises: the cooling medium in the steam cooler (12) is circulating water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222945642.1U CN218717027U (en) | 2022-11-04 | 2022-11-04 | Power generation system utilizing supercritical carbon dioxide for heat storage and peak shaving |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222945642.1U CN218717027U (en) | 2022-11-04 | 2022-11-04 | Power generation system utilizing supercritical carbon dioxide for heat storage and peak shaving |
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| CN202222945642.1U Active CN218717027U (en) | 2022-11-04 | 2022-11-04 | Power generation system utilizing supercritical carbon dioxide for heat storage and peak shaving |
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