CN215864084U - Heat absorption and storage integrated system based on secondary reflection technology - Google Patents
Heat absorption and storage integrated system based on secondary reflection technology Download PDFInfo
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- CN215864084U CN215864084U CN202122426211.XU CN202122426211U CN215864084U CN 215864084 U CN215864084 U CN 215864084U CN 202122426211 U CN202122426211 U CN 202122426211U CN 215864084 U CN215864084 U CN 215864084U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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Abstract
The utility model relates to a heat absorption and storage integrated system based on a secondary reflection technology, which comprises a modularized heliostat field, a secondary reflector, a modularized heat absorption and storage device, a central hot-melt salt buffer tank, a central hot-melt salt pump, a heat exchanger, a central cold-melt salt tank and a central cold-melt salt pump. One or more sets of the modularized heliostat field, the secondary reflector and the modularized heat absorption and storage device can be distributed in the peripheral area of the central cold-molten salt storage tank; the modularized heat absorption and storage device comprises a heat absorption and storage integrated tank and a module molten salt pump and is used for absorbing and storing solar heat. The solar energy power generation system based on the secondary reflection technology has the advantages that the solar energy power generation system can adapt to the operation characteristics of the solar tower type photo-thermal power station, the operation safety of the solar power station is improved, the manufacturing cost of the power station is reduced, and the solar energy photo-thermal power generation system based on the secondary reflection technology has higher market competitiveness.
Description
Technical Field
The utility model belongs to the field of solar photo-thermal power generation, and particularly relates to a heat absorption and storage integrated system based on a secondary reflection technology.
Background
Under the background of 'carbon peak reaching' and 'carbon neutralization', a plurality of new energy complementary power generation modes are increasingly concerned, and a solar thermal power generation system has the characteristic of self-contained energy storage and can form a stable and adjustable basic power supply together with new energy such as photovoltaic energy, wind power energy and the like in the future. The tower type photo-thermal power generation system is generally composed of a heliostat, a heat absorber, a heat absorption tower, a cold molten salt storage tank, a hot molten salt storage tank, a heat exchanger, a turbo generator set and other auxiliary systems and equipment, and has the characteristics of high heat collection efficiency and large energy storage capacity. Under the market environment of full competition, the photo-thermal power generation technology potential is based on the essence of the system, a heat absorption and storage system which is safe and reliable is constructed, the construction cost and the operation cost have advantages, and the power consumption cost is reduced as much as possible so as to adapt to the development trend of new energy in the future.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: aiming at the defects and shortcomings of the prior art, the heat absorption and heat storage integrated system based on the secondary reflection technology is provided, a heat absorber and a hot-melting salt storage tank in the traditional tower type photo-thermal power generation technology are combined into one, and meanwhile, a cold-melting salt conveying pipeline and a hot-melting salt conveying pipeline are combined into one, so that the construction cost and the operation cost of a tower type photo-thermal power station are reduced, and the operation safety and the economical efficiency are improved.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a heat absorption and heat storage integrated system based on a secondary reflection technology is composed of a modularized heliostat field, a secondary reflector, a modularized heat absorption and heat storage device, a central hot-melt salt buffer tank, a central hot-melt salt pump, a heat exchanger, a central cold-melt salt tank and a central cold-melt salt pump; the modularized heat absorption and storage device comprises a heat absorption and storage integrated tank and a module molten salt pump; the central hot molten salt buffer tank, the central hot molten salt pump, the heat exchanger, the central cold molten salt tank and the central cold molten salt pump are sequentially connected through a conveying pipeline; the central cold molten salt tank is respectively connected with the central hot molten salt buffer tank and the heat absorption and storage integrated tank through a conveying pipeline; and the outlet pipeline of the heat absorption and storage integrated tank is connected with a conveying pipeline of the heat absorption and storage integrated tank.
In the present invention: the modularized heliostat field and the secondary reflector focus solar energy and then project the solar energy into the modularized heat absorption and storage device.
In the present invention: and a heat insulation protective cover plate is arranged on the heat absorption and storage integrated tank.
In the present invention: the modularized heat absorption and storage device has two functions of heat absorption and heat storage, molten salt forms a certain liquid level in the heat absorption and storage integrated tank, and directly absorbs solar energy focused by the secondary reflector, so that the temperature of the molten salt is raised, and the solar energy is converted into heat energy. The modular heat absorption and heat storage device conveys the heated hot molten salt to the central hot molten salt buffer tank and receives the cold molten salt conveyed by the central cold molten salt tank.
In the present invention: the molten salt pipeline between the modularized heat absorption and storage device and the central hot molten salt buffer tank and between the modularized heat absorption and storage device and the central cold molten salt tank is a cold and hot molten salt shared conveying pipeline, cold molten salt is conveyed from the central cold molten salt tank to the modularized heat absorption and storage device when the modularized heat absorption and storage device absorbs heat, and hot molten salt is conveyed from the modularized heat absorption and storage device to the central hot molten salt buffer tank when power is generated.
In the present invention: the cold and hot molten salt shared conveying pipeline is laid by a single pipe, and a process isolation valve is installed on the pipeline and used for switching heat absorption and power generation working conditions. Specifically, be equipped with stop valve one on the cold molten salt pump export pipeline of central authorities, inhale the pipeline that the integrative jar of heat storage and central hot molten salt buffer tank are connected and be equipped with stop valve two, be equipped with stop valve four on the pipeline of inhaling the integrative jar of heat storage, be equipped with stop valve three on the export pipeline.
In the present invention: the cold and hot molten salt sharing conveying pipeline inclines towards the modularized heat absorption and heat storage device from the central hot molten salt buffer tank and the central cold molten salt tank, and the molten salt in the conveying pipeline can flow back to the modularized heat absorption and heat storage device by means of gravity under the shutdown and accident conditions.
In the present invention: the central hot-melt salt pump pumps the hot-melt salt in the central hot-melt salt buffer tank to the heat exchanger, high-temperature and high-pressure steam is generated after heat exchange with water in the heat exchanger, the steam goes to the generator set and is converted into electric power, and the molten salt becomes cold molten salt after heat exchange and enters the central cold-melt salt tank.
In the present invention: the modular heliostat field, the secondary reflector and the modular heat absorption and storage device can be one set or a plurality of sets, are distributed in the peripheral area of the central cold molten salt tank, and the number of modules can be adjusted according to installed capacity.
After adopting the structure, the utility model has the beneficial effects that:
(1) the heat absorber and the hot-melt salt storage tank in the traditional tower type photo-thermal power generation technology are combined into a whole to form a modular heat absorption and heat storage device, so that the construction cost of the heat absorber is saved, and the construction cost of a photo-thermal power station can be remarkably reduced.
(2) Based on the secondary reflection technique, in focusing solar energy to the integrative jar of heat absorption and storage of modularization heat-absorbing and storing device, the fused salt in the storage tank directly absorbs solar energy, and the intensification becomes hot fused salt, has reduced the stifled risk of freezing of fused salt at the heat absorption in-process, and under accident operating mode such as the fused salt pump falls the power failure, the hot fused salt in the integrative jar of heat absorption and storage can rely on hot inertia to keep not freezing stifled for a long time, and system operation security obtains very big promotion.
(3) Based on the secondary reflection technology, the modularized heat absorption and storage device is arranged on the ground, so that the convection heat dissipation loss is reduced, and the heat absorption efficiency is improved.
(4) Based on the secondary reflection technology, the modular heat absorption and storage device is arranged on the ground, so that the pump power consumption and the power station self-power utilization ratio are reduced, and the economical efficiency of the power station operation is improved.
(5) The molten salt pipeline between the modular heat absorption and storage device and the central hot-melt salt buffer tank and between the modular heat absorption and storage device and the central cold-melt salt buffer tank is a cold and hot molten salt shared conveying pipeline, cold molten salt is conveyed from the central cold-melt salt buffer tank to the modular heat absorption and storage device when the heat absorption and storage device absorbs heat, hot molten salt is conveyed from the modular heat absorption and storage device to the central hot-melt salt buffer tank during power generation, two-way molten salt pipelines in a traditional photo-thermal power station are combined into a single-way molten salt pipeline, and the construction cost of the power station can be effectively reduced.
(6) Cold and hot fused salt sharing pipeline is from central hot molten salt buffer tank, central cold molten salt jar slope to modularization heat absorption heat-retaining device, and the fused salt can rely on gravity to flow back to modularization heat absorption heat-retaining device in the pipeline under shut down and accident condition, can reduce the fused salt and solidify the risk, practices thrift electric tracing operating cost, improves the security and the economic nature of solar energy light and heat power station operation.
Drawings
FIG. 1 is a schematic block diagram of an embodiment of the present invention, and the drawings herein are provided to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, though not necessarily limiting of the utility model.
In fig. 1, the heat absorption and storage integrated system based on the secondary reflection technology includes: the system comprises a central hot-melt salt buffer tank 101, a central hot-melt salt pump 102, a heat exchanger 103, a central cold-melt salt tank 105, a central cold-melt salt pump 106, a first stop valve 107, a conveying pipeline 108 and a second stop valve 115; the solar energy collecting and heat accumulating combined system comprises a secondary reflecting mirror 201, a modularized heliostat field 202, a heat absorbing and storing integrated tank 203, a module molten salt pump 204, a heat insulation protective cover plate 205, a third stop valve 207, a fourth stop valve 208 and an outlet pipeline 209.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with fig. 1, wherein the exemplary embodiments and descriptions are provided to illustrate the present invention and not to limit the present invention.
Examples
As shown in fig. 1, the heat absorption and heat storage integrated system based on the secondary reflection technology is composed of a modular heliostat field 202, a secondary reflector 201, a modular heat absorption and heat storage device, a central hot-melt salt buffer tank 101, a central hot-melt salt pump 102, a heat exchanger 103, a central cold-melt salt tank 105 and a central cold-melt salt pump 106; the modularized heat absorption and storage device comprises a heat absorption and storage integrated tank 203 and a module molten salt pump 204; the central hot molten salt buffer tank, the central hot molten salt pump, the heat exchanger, the central cold molten salt tank and the central cold molten salt pump are sequentially connected through a conveying pipeline 108; the central cold molten salt tank is respectively connected with a central hot molten salt buffer tank and a heat absorption and storage integrated tank 203 through a conveying pipeline; and a module molten salt pump 204 is arranged on an outlet pipeline 209 of the heat absorption and storage integrated tank, and the outlet pipeline is connected with a conveying pipeline of the heat absorption and storage integrated tank.
And a heat insulation protective cover plate 205 is arranged on the heat absorption and storage integrated tank.
The conveying pipeline lays for the single tube, be equipped with stop valve 107 on the cold molten salt pump export conveying pipeline of central authorities, be equipped with stop valve two 115 on the conveying pipeline that the integrative jar of heat absorption and storage and central hot molten salt buffer tank are connected, be equipped with stop valve four 208 on the conveying pipeline of the integrative jar of heat absorption and storage, be equipped with stop valve three 207 on the export pipeline 209.
The modular heliostat field, the secondary reflector and the modular heat absorption and storage device can be one set or a plurality of sets and are distributed in the peripheral area of the central cold molten salt tank. As shown in FIG. 1, four sets are selected for this embodiment.
As shown in fig. 1, in the heat absorption and heat storage integrated system based on the secondary reflection technology, under the heat collection operation condition of the solar power station, the heat insulation protective cover plate 205 is in an open state, the modularized heliostat field 202 converges solar energy onto the secondary reflector 201, the solar energy is focused again by the secondary reflector and then is projected into the heat absorption and storage integrated tank 203, and the molten salt in the heat absorption and storage integrated tank 203 is at a low liquid level 211 when the solar power station starts to operate every day.
Cold molten salt stored in the central cold molten salt tank 105 is pressurized by a central cold molten salt pump 106 and then is conveyed to the modular heat absorption and storage device through a conveying pipeline 108 to absorb solar energy and convert the solar energy into heat energy of molten salt, at the moment, a first stop valve 107 is opened, a fourth stop valve 208 is opened, a second stop valve 115 is closed, a third stop valve 207 is closed, the liquid level of the molten salt in the heat absorption and storage integrated tank 203 is continuously increased, the temperature is increased to about 565 ℃ to become hot molten salt, the hot molten salt is stored until the highest liquid level 210 is reached, and the modular heat absorption and storage device enters a shutdown mode; the system enters a solar power station heat collection and power generation working condition, and the heat insulation protective cover plate 205 is in a closed state.
The module molten salt pump 204 conveys the hot molten salt in the heat absorption and storage integrated tank 203 to the central hot molten salt buffer tank 101 through the conveying pipeline 108, under the working condition, the first stop valve 107 is closed, the fourth stop valve 208 is closed, the second stop valve 115 is opened, the third stop valve 207 is opened, the hot molten salt is pumped to the heat exchanger 103 after being pressurized by the central hot molten salt pump 102, steam is generated to push a steam turbine generator unit, the hot molten salt is cooled to be cold molten salt (about 300 ℃) after passing through the heat exchanger, and the cold molten salt enters the central cold molten salt tank 105 to be stored until the molten salt in the heat absorption and storage integrated tank 203 reaches the low liquid level 211. After the power station finishes the heat collection and power generation task of the day, the molten salt in the conveying pipeline 108 can be discharged to the modular heat absorption and storage device by virtue of gravity.
Claims (4)
1. The heat absorption and heat storage integrated system based on the secondary reflection technology is characterized by comprising a modularized heliostat field (202), a secondary reflector (201), a modularized heat absorption and heat storage device, a central hot molten salt buffer tank (101), a central hot molten salt pump (102), a heat exchanger (103), a central cold molten salt tank (105) and a central cold molten salt pump (106); the modularized heat absorption and storage device comprises a heat absorption and storage integrated tank (203) and a module molten salt pump (204); the central hot molten salt buffer tank, the central hot molten salt pump, the heat exchanger, the central cold molten salt tank and the central cold molten salt pump are sequentially connected through a conveying pipeline (108); the central cold molten salt tank is respectively connected with a central hot molten salt buffer tank and a heat absorption and storage integrated tank (203) through a conveying pipeline; and a module molten salt pump (204) is arranged on an outlet pipeline (209) of the heat absorption and storage integrated tank, and the outlet pipeline is connected with a conveying pipeline of the heat absorption and storage integrated tank.
2. The integrated heat absorption and heat storage system based on the secondary reflection technology as claimed in claim 1, wherein a heat insulation protective cover plate (205) is arranged on the integrated heat absorption and heat storage tank.
3. The heat absorption and storage integrated system based on the secondary reflection technology as claimed in claim 1, wherein the delivery pipeline is laid by a single pipe, a first stop valve (107) is arranged on the delivery pipeline of the central cold molten salt pump, a second stop valve (115) is arranged on the delivery pipeline of the heat absorption and storage integrated tank connected with the central hot molten salt buffer tank, a fourth stop valve (208) is arranged on the delivery pipeline of the heat absorption and storage integrated tank, and a third stop valve (207) is arranged on the outlet pipeline (209).
4. The integrated heat absorption and heat storage system based on the secondary reflection technology as claimed in claim 1, wherein the modular heliostat field, the secondary reflector and the modular heat absorption and heat storage device are one or more sets, and are distributed in the peripheral area of the central cold-molten salt tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122426211.XU CN215864084U (en) | 2021-10-09 | 2021-10-09 | Heat absorption and storage integrated system based on secondary reflection technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122426211.XU CN215864084U (en) | 2021-10-09 | 2021-10-09 | Heat absorption and storage integrated system based on secondary reflection technology |
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| CN215864084U true CN215864084U (en) | 2022-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113970188A (en) * | 2021-10-09 | 2022-01-25 | 上海晶电新能源有限公司 | Heat absorption and storage integrated system based on secondary reflection technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113970188A (en) * | 2021-10-09 | 2022-01-25 | 上海晶电新能源有限公司 | Heat absorption and storage integrated system based on secondary reflection technology |
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