CN114543573B - Fused salt heat storage and release method for improving fused salt medium heat exchange power and reducing failure rate - Google Patents
Fused salt heat storage and release method for improving fused salt medium heat exchange power and reducing failure rate Download PDFInfo
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- CN114543573B CN114543573B CN202210023580.0A CN202210023580A CN114543573B CN 114543573 B CN114543573 B CN 114543573B CN 202210023580 A CN202210023580 A CN 202210023580A CN 114543573 B CN114543573 B CN 114543573B
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- 150000003839 salts Chemical class 0.000 title claims abstract description 335
- 238000005338 heat storage Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000007667 floating Methods 0.000 claims abstract description 28
- 238000009413 insulation Methods 0.000 claims abstract description 28
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000004146 energy storage Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
Classifications
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The invention discloses a fused salt heat storage and release method for improving fused salt medium heat exchange power and reducing failure rate, which solves the problems of saving occupied space and effectively utilizing the volume of a tank body under the condition of meeting the field use; the traditional cold and hot storage tanks are combined into a whole, only one molten salt heat storage tank is arranged, high-temperature molten salt is stored in the lower part of the heat storage tank, low-temperature molten salt is stored in the upper part of the heat storage tank, and a floating heat insulation plate is arranged between the high-temperature molten salt and the low-temperature molten salt in the tank; when heat is stored, low-temperature molten salt is output from the tank top, heated by a heat storage heat exchanger to store energy, and then flows back into the molten salt heat storage tank from the tank bottom; when releasing heat, the high-temperature molten salt is output from the tank bottom, and after the energy is released by cooling through the heat release heat exchanger, the high-temperature molten salt flows back into the molten salt heat storage tank from the tank top; because the high-temperature medium is always positioned at the middle lower part of the tank, the low-temperature molten salt is always arranged at the upper part of the tank, and the low-temperature molten salt always endows the high-temperature molten salt with stable power, the two tanks are combined into a whole, so that the occupied space is saved, and the investment cost of manufacturers is reduced.
Description
Technical Field
The invention relates to a fused salt heat storage and release method, in particular to a heat storage and release method of a fused salt heat storage and release system for deep peak shaving of a thermal power plant.
Background
The temperature range of the heat storage medium of the molten salt heat storage system for the thermal power plant is as follows: at 190-520 ℃, at present, a molten salt heat storage system is provided with a cold tank and a hot tank, wherein the cold tank is used for storing low-temperature molten salt, the temperature of the low-temperature molten salt is about 190 ℃, the hot tank is used for storing high-temperature molten salt, and the temperature of the high-temperature molten salt is about 520 ℃; a low-temperature molten salt pump is connected to the low-temperature molten salt tank and is used for circulating heat exchange of the low-temperature molten salt; the high-temperature molten salt tank is connected with a high-temperature molten salt pump for circulating heat exchange of the high-temperature molten salt; when the thermal power plant carries out deep peak shaving, the heat storage medium in the molten salt heat storage tank system is in a low-temperature molten salt working state or a high-temperature molten salt working state, so that one of the low-temperature molten salt tank and the high-temperature molten salt tank is always in an empty tank or an unfilled tank state, and molten salt tank equipment is not fully utilized; in addition, the molten salt tank is huge in size, large in occupied area and large in investment, particularly in a high-temperature molten salt tank circulating system, as the temperature of a molten salt medium is as high as 500 ℃, high-temperature causes frequent faults of a high-temperature molten salt circulating pump, and the normal working order of the site is greatly influenced by maintenance and replacement; in addition, when the high-temperature medium in the high-temperature tank body is in a state of not filling the tank, when the high-temperature molten salt circulates to release heat, the problem that the power is unstable and the heat release and work are influenced exists; under the condition of meeting the field use, the space occupation is saved, the efficiency of heat release and work application of a high-temperature medium is improved, the failure rate of a circulating pump is reduced, and the problem to be solved on the spot is solved.
Disclosure of Invention
The invention provides a fused salt heat storage and release method for improving the heat exchange power of a fused salt medium and reducing the failure rate, which solves the technical problems of saving the occupied space of a system, effectively improving the heat release and work efficiency of a high-temperature medium and reducing the failure rate of a circulating pump.
The invention solves the technical problems by the following technical proposal:
the general conception of the invention is that: the traditional cold and hot molten salt storage tanks are combined into one, only one molten salt heat storage tank is arranged, a high-temperature molten salt pump is omitted, and a low-temperature molten salt pump shared by high-temperature molten salt circulation and low-temperature molten salt circulation is arranged; when the high-temperature molten salt releases heat for circulation, the high-temperature molten salt releases heat firstly, and after the temperature is reduced, the high-temperature molten salt passes through a low-temperature molten salt pump to realize the circulation of the high-temperature molten salt; storing high-temperature molten salt at the lower part of the integrated heat storage tank, storing low-temperature molten salt at the upper part of the integrated heat storage tank, and arranging a floating heat insulation plate between the high-temperature molten salt and the low-temperature molten salt in the tank; when heat is stored, low-temperature molten salt is output from the tank top, and flows back into the molten salt heat storage tank from the tank bottom after passing through the low-temperature molten salt pump body, being heated and stored by the heat storage heat exchanger; when releasing heat, the high-temperature molten salt is output from the tank bottom, the energy is released by cooling through the heat release heat exchanger, and then flows back to the molten salt heat storage tank from the tank top through the low-temperature molten salt circulating pump, so that the dual-purpose of one pump is realized; because the high-temperature molten salt medium is always positioned at the middle lower part of the tank, the low-temperature molten salt is always arranged at the upper part of the tank, and the low-temperature molten salt always endows the high-temperature molten salt with stable power, the effect of acting the system is improved, and the deep peak shaving of the power plant is satisfied.
A molten salt heat storage and release method for improving heat exchange power of molten salt medium and reducing failure rate comprises a molten salt heat storage tank, low-temperature molten salt, high-temperature molten salt, a low-temperature molten salt pump, a heat storage heat exchanger and a heat release heat exchanger; the method is characterized by comprising the following steps of:
the method comprises the steps that (1) low-temperature molten salt and high-temperature molten salt are arranged in the same molten salt heat storage tank, cheng Fanggao-temperature molten salt is arranged at the lower part in the molten salt heat storage tank, a floating heat insulation plate is arranged on the top end face of the high-temperature molten salt, the low-temperature molten salt is placed in the molten salt heat storage tank on the floating heat insulation plate, the low-temperature molten salt and the high-temperature molten salt are isolated through the floating heat insulation plate, and the low-temperature molten salt gives pressure to the high-temperature molten salt; a low-temperature molten salt output input port is arranged at the upper end of the molten salt heat storage tank, and a high-temperature molten salt output input port is arranged on the bottom end surface of the molten salt heat storage tank;
when the energy storage and heat exchange are carried out on molten salt in the tank, the low-temperature molten salt pump is connected with the heat storage heat exchanger in series and then is connected between the low-temperature molten salt output and input port and the high-temperature molten salt output and input port, and the low-temperature molten salt flowing out from the low-temperature molten salt output and input port firstly passes through the low-temperature molten salt pump and then absorbs heat through the heat storage heat exchanger; the heated low-temperature molten salt is heated to be high-temperature molten salt, enters the lower part in the molten salt heat storage tank through the high-temperature molten salt output and input port, realizes heat storage, and enables the floating heat insulation plate to move upwards;
when the energy output heat release is carried out on the molten salt in the tank, connecting a low-temperature molten salt pump and a heat release heat exchanger in series, connecting the low-temperature molten salt pump and the heat release heat exchanger between a low-temperature molten salt output input port and a high-temperature molten salt output input port, enabling the high-temperature molten salt at the lower part in the molten salt heat storage tank to enter the heat release heat exchanger through the high-temperature molten salt output input port, cooling the high-temperature molten salt by an external medium, converting heat energy into the external medium, cooling the high-temperature molten salt to be good low-temperature molten salt, pumping the low-temperature molten salt into the upper part in the tank of the molten salt heat storage tank through the low-temperature molten salt output input port through the low-temperature molten salt pump, realizing energy release, and enabling the floating heat insulation plate to move downwards; in the whole heat release process, the high-temperature molten salt is acted by the pressure of the low-temperature molten salt above the floating heat insulation plate, so that the stable power for releasing heat and doing work is provided.
The energy storage and heat exchange process of the molten salt in the tank and the energy output and heat release process of the molten salt in the tank are carried out through the same low-temperature molten salt pump, so that the energy storage and heat release of the system are realized by only using one molten salt heat storage tank and the same low-temperature molten salt pump; the floating heat insulation plate is made of the same material as the tank wall of the molten salt heat storage tank, and the outer circular side surface of the floating heat insulation plate is an upward wedge-shaped surface so as to be suitable for the temperature environment of upper cooling and lower heating in the tank.
The low-temperature molten salt heat exchange device comprises a low-temperature molten salt output and input common pipeline, wherein the other end of the low-temperature molten salt output and input common pipeline is communicated with the upper port of a first tee joint, the lower port of the first tee joint is connected with a low-temperature molten salt heat exchange front conveying pipeline, the other end of the low-temperature molten salt heat exchange front conveying pipeline is communicated with the upper port of a second tee joint, a first valve is arranged on the low-temperature molten salt heat exchange front conveying pipeline, the right port of the second tee joint is communicated with the input end of a low-temperature molten salt pump, the output end of the low-temperature molten salt pump is communicated with the lower port of a third tee joint, the right port of the third tee joint is communicated with the input end of a heat storage heat exchanger through the second valve, the output end of the heat storage heat exchanger is communicated with the upper port of a fourth tee joint through the third valve, the left port of the fourth tee joint is connected with a low-temperature molten salt heat exchange rear conveying pipeline, and the other end of the low-temperature molten salt heat exchange rear conveying pipeline is communicated with the high-temperature molten salt output and input port; the right port of the fourth tee joint is connected with a high-temperature molten salt heat release front conveying pipeline, the other end of the high-temperature molten salt heat release front conveying pipeline is communicated with the input end of the heat release heat exchanger, the high-temperature molten salt heat release front conveying pipeline is provided with a fourth valve, the output end of the heat release heat exchanger is connected with a high-temperature molten salt heat release rear conveying pipeline (23), the other end of the high-temperature molten salt heat release rear conveying pipeline is communicated with the lower port of the second tee joint, the high-temperature molten salt heat release rear conveying pipeline is provided with a fifth valve, the upper port of the third tee joint is connected with a high-temperature molten salt heat release rear second conveying pipeline, the other end of the high-temperature molten salt heat release rear second conveying pipeline is communicated with the right port of the first tee joint, and the high-temperature molten salt heat release rear conveying pipeline is provided with a sixth valve; a check valve is arranged on the output port of the low-temperature molten salt pump.
According to the invention, the high-temperature tank and the low-temperature tank of the traditional molten salt heat storage system are organically combined into one tank, and meanwhile, after the high-temperature molten salt is subjected to heat release and temperature reduction, the high-temperature molten salt is subjected to pump circulation, so that the low-temperature molten salt circulating pump can be used as one pump, the equipment investment and the occupied area are saved, and the problem of frequent fault occurrence of the high-temperature circulating pump is solved; in addition, the invention also utilizes the pressure provided by the low-temperature molten salt at the upper part in the storage tank for the high-temperature molten salt at the lower part in the tank, stabilizes the power required by the flow of the high-temperature molten salt, and improves the effect of system work.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of the invention when energy storage and heat exchange are performed on molten salt in a tank;
FIG. 3 is a schematic diagram of the structure of the invention when the output energy of molten salt in the tank is released.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
the molten salt heat storage and release method for improving the heat exchange power of the molten salt medium and reducing the failure rate comprises a molten salt heat storage tank 1, low-temperature molten salt 2, high-temperature molten salt 4, a low-temperature molten salt pump 7, a heat storage heat exchanger 5 and a heat release heat exchanger 6; the method is characterized by comprising the following steps of:
the method comprises the steps that (1) low-temperature molten salt 2 and high-temperature molten salt 4 are arranged in the same molten salt heat storage tank 1, cheng Fanggao temperature molten salt 4 is arranged at the lower part in the molten salt heat storage tank 1, a floating heat insulation plate 3 is arranged on the top end face of the temperature molten salt 4, low-temperature molten salt 2 is placed in the molten salt heat storage tank 1 on the floating heat insulation plate 3, the low-temperature molten salt 2 and the high-temperature molten salt 4 are isolated through the floating heat insulation plate 3, and the low-temperature molten salt 2 gives pressure to the high-temperature molten salt 4; a low-temperature molten salt output input port 8 is arranged at the upper end of the molten salt heat storage tank 1, and a high-temperature molten salt output input port 9 is arranged on the bottom end surface of the molten salt heat storage tank 1;
when energy storage and heat exchange are carried out on molten salt in the tank, the low-temperature molten salt pump 7 is connected with the heat storage heat exchanger 5 in series, and then is connected between the low-temperature molten salt output input port 8 and the high-temperature molten salt output input port 9, and the low-temperature molten salt 2 flowing out of the low-temperature molten salt output input port 8 firstly passes through the low-temperature molten salt pump 7 and then absorbs heat through the heat storage heat exchanger 5; the heated low-temperature molten salt 2 is heated to be high-temperature molten salt 4, enters the lower part in the molten salt heat storage tank 1 through the high-temperature molten salt output and input port 9, realizes heat storage, and moves the floating heat insulation plate 3 upwards;
when the molten salt in the tank releases heat by outputting energy, the low-temperature molten salt pump 7 is connected in series with the heat release heat exchanger 6 and then is connected between the low-temperature molten salt output input port 8 and the high-temperature output input port 9, the high-temperature molten salt 4 at the lower part in the tank of the molten salt heat storage tank 1 enters the heat release heat exchanger 6 through the high-temperature molten salt output input port 9 firstly and is cooled by an external medium, heat energy is converted to the external medium, the high-temperature molten salt 4 is cooled to be good in low-temperature molten salt 2, and then is pumped into the upper part in the tank of the molten salt heat storage tank 1 through the low-temperature molten salt output input port 8 to realize energy release, and the floating heat insulation plate 3 moves downwards; in the whole heat release process, the high-temperature molten salt 4 is acted by the pressure of the low-temperature molten salt 2 above the floating heat insulation plate 3, and has stable power for releasing heat and doing work.
The energy storage and heat exchange process of the molten salt in the tank and the energy output and heat release process of the molten salt in the tank are carried out through the same low-temperature molten salt pump 7, so that the energy storage and heat release of the system are realized by only using one molten salt heat storage tank 1 and the same low-temperature molten salt pump 7; the floating heat insulation plate 3 is made of the same material as the tank wall of the molten salt heat storage tank 1, and the outer circular side surface of the floating heat insulation plate 3 is an upward wedge-shaped surface so as to be suitable for the temperature environment of upper cooling and lower heating in the tank.
The utility model provides a can improve fused salt heat storage tank system of volume utilization ratio, including fused salt heat storage tank 1, low temperature fused salt 2, high temperature fused salt 4, low temperature fused salt pump 7, heat storage heat exchanger 5 and exothermic heat exchanger 6, be provided with high temperature fused salt 4 in the jar lower part of fused salt heat storage tank 1, be provided with floating thermal insulation board 3 on the top end face of high temperature fused salt 4, be provided with low temperature fused salt 2 in the jar of fused salt heat storage tank 1 on floating thermal insulation board 3, be provided with low temperature fused salt output input port 8 in the upper end of fused salt heat storage tank 1, be provided with high temperature fused salt output input port 9 on the bottom end face of fused salt heat storage tank 1; the low-temperature molten salt heat exchange device is characterized in that a low-temperature molten salt output and input common pipeline 10 is connected to a low-temperature molten salt output and input port 8, the other end of the low-temperature molten salt output and input common pipeline 10 is communicated with the upper port of a first tee joint 11, a low-temperature molten salt heat exchange front conveying pipeline 12 is connected to the lower port of the first tee joint 11, the other end of the low-temperature molten salt heat exchange front conveying pipeline 12 is communicated with the upper port of a second tee joint 14, a first valve 13 is arranged on the low-temperature molten salt heat exchange front conveying pipeline 12, the right port of the second tee joint 14 is communicated with the input end of a low-temperature milk molten salt pump 7, the output end of the low-temperature molten salt pump 7 is communicated with the lower port of a third tee joint 15, the right port of the third tee joint 15 is communicated with the input end of a heat storage heat exchanger 5 through a second valve 16, the output end of the heat storage heat exchanger 5 is communicated with the upper port of a fourth tee joint 18 through a third valve 17, a low-temperature molten salt heat exchange rear conveying pipeline 19 is connected to the left port of the fourth tee joint 18, and the other end of the low-temperature molten salt heat exchange rear conveying pipeline 19 is communicated with the high-temperature output port 9; the right port of the fourth tee 18 is connected with a high-temperature molten salt heat release front conveying pipeline 20, the other end of the high-temperature molten salt heat release front conveying pipeline 20 is communicated with the input end of the heat release heat exchanger 6, the high-temperature molten salt heat release front conveying pipeline 20 is provided with a fourth valve 21, the output end of the heat release heat exchanger 6 is connected with a high-temperature molten salt heat release rear conveying pipeline 23, the other end of the high-temperature molten salt heat release rear conveying pipeline 23 is communicated with the lower port of the second tee 14, the high-temperature molten salt heat release rear conveying pipeline 23 is provided with a fifth valve 22, the upper port of the third tee 15 is connected with a high-temperature molten salt heat release rear second conveying pipeline 25, the other end of the high-temperature molten salt heat release rear second conveying pipeline 25 is communicated with the right port of the first tee 11, and the high-temperature molten salt heat release rear second conveying pipeline 25 is provided with a sixth valve 24; a check valve 26 is provided at the output port of the low-temperature molten salt pump 7.
Claims (3)
1. The molten salt heat storage and release method for improving the heat exchange power of the molten salt medium and reducing the failure rate comprises a molten salt heat storage tank (1), low-temperature molten salt (2), high-temperature molten salt (4), a low-temperature molten salt pump (7), a heat storage heat exchanger (5) and an exothermic heat exchanger (6); the method is characterized by comprising the following steps of:
the method comprises the steps that firstly, low-temperature molten salt (2) and high-temperature molten salt (4) are arranged in the same molten salt heat storage tank (1), cheng Fanggao-temperature molten salt (4) is arranged at the lower part in the molten salt heat storage tank (1), a floating heat insulation plate (3) is arranged on the top end face of the high-temperature molten salt (4), the low-temperature molten salt (2) is placed in the molten salt heat storage tank (1) on the floating heat insulation plate (3), the low-temperature molten salt (2) and the high-temperature molten salt (4) are isolated through the floating heat insulation plate (3), and the low-temperature molten salt (2) gives pressure to the high-temperature molten salt (4); a low-temperature molten salt output input port (8) is arranged at the upper end of the molten salt heat storage tank (1), and a high-temperature molten salt output input port (9) is arranged on the bottom end surface of the molten salt heat storage tank (1);
when the energy storage and heat exchange are carried out on molten salt in the tank, the low-temperature molten salt pump (7) is connected in series with the heat storage heat exchanger (5) and then is connected between the low-temperature molten salt output input port (8) and the high-temperature molten salt output input port (9), and the low-temperature molten salt (2) flowing out of the low-temperature molten salt output input port (8) firstly passes through the low-temperature molten salt pump (7) and then absorbs heat through the heat storage heat exchanger (5); the heated low-temperature molten salt (2) is heated to be high-temperature molten salt (4), enters the lower part in the molten salt heat storage tank (1) through a high-temperature molten salt output and input port (9), realizes heat storage, and enables the floating heat insulation plate (3) to move upwards;
when the energy is output to release heat of the molten salt in the tank, connecting a low-temperature molten salt pump (7) with the heat release heat exchanger (6) in series, connecting the low-temperature molten salt pump between a low-temperature molten salt output input port (8) and a high-temperature molten salt output input port (9), enabling the high-temperature molten salt (4) at the lower part in the molten salt heat storage tank (1) to enter the heat release heat exchanger (6) through the high-temperature molten salt output input port (9) firstly, cooling by an external medium, converting heat energy to the external medium, cooling the high-temperature molten salt (4) into the low-temperature molten salt (2), pumping the low-temperature molten salt into the upper part of the molten salt heat storage tank (1) through the low-temperature molten salt output input port (8) through the low-temperature molten salt pump (7), realizing energy release, and enabling the floating heat insulation plate (3) to move downwards; in the whole heat release process, the high-temperature molten salt (4) is acted by the pressure of the low-temperature molten salt (2) above the floating heat insulation plate (3), so that the stable power for releasing heat and doing work is provided.
2. The molten salt heat storage and release method for improving the heat exchange power of the molten salt medium and reducing the failure rate according to claim 1 is characterized in that the energy storage and heat exchange process of molten salt in a tank and the heat release process of output energy of the molten salt in the tank are carried out through the same low-temperature molten salt pump (7), so that the energy storage of a system and the heat release of the system are realized by only using one molten salt heat storage tank (1) and the same low-temperature molten salt pump (7); the floating heat insulation plate (3) is made of the same material as the tank wall of the molten salt heat storage tank (1), and the outer circular side surface of the floating heat insulation plate (3) is an upward wedge-shaped surface so as to be suitable for the temperature environment of upper cooling and lower heating in the tank.
3. The molten salt heat storage and release method for improving molten salt medium heat exchange power and reducing failure rate according to claim 2 is characterized in that a low-temperature molten salt output and input shared pipeline (10) is connected to a low-temperature molten salt output and input port (8), the other end of the low-temperature molten salt output and input shared pipeline (10) is communicated with the upper port of a first tee joint (11), a low-temperature molten salt heat exchange front conveying pipeline (12) is connected to the lower port of the first tee joint (11), the other end of the low-temperature molten salt heat exchange front conveying pipeline (12) is communicated with the upper port of a second tee joint (14), a first valve (13) is arranged on the low-temperature molten salt heat exchange front conveying pipeline (12), the right port of the second tee joint (14) is communicated with the input end of a low-temperature molten salt pump (7), the output end of the low-temperature molten salt pump (7) is communicated with the lower port of a third tee joint (15), the right port of the third tee joint (15) is communicated with the input end of a heat accumulator (5) through a second valve (16), the output end of the heat accumulator (5) is communicated with the upper port of a fourth tee joint (18) through a third valve (17), the other end of the conveying pipeline (19) is communicated with the high-temperature molten salt output and input port (9) after the heat exchange of the low-temperature molten salt; a right port of the fourth tee joint (18) is connected with a high-temperature molten salt before-heat release conveying pipeline (20), the other end of the high-temperature molten salt before-heat release conveying pipeline (20) is communicated with an input end of the heat release heat exchanger (6), a fourth valve (21) is arranged on the high-temperature molten salt before-heat release conveying pipeline (20), an output end of the heat release heat exchanger (6) is connected with a high-temperature molten salt after-heat release conveying pipeline (23), the other end of the high-temperature molten salt after-heat release conveying pipeline (23) is communicated with a lower port of the second tee joint (14), a fifth valve (22) is arranged on the high-temperature molten salt after-heat release conveying pipeline (23), a high-temperature molten salt after-heat release second conveying pipeline (25) is connected to an upper port of the third tee joint (15), the other end of the high-temperature molten salt after-heat release second conveying pipeline (25) is communicated with a right port of the first tee joint (11), and a sixth valve (24) is arranged on the high-temperature molten salt after-heat release conveying pipeline (25); a check valve (26) is provided at the output port of the low-temperature molten salt pump (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210023580.0A CN114543573B (en) | 2022-01-10 | 2022-01-10 | Fused salt heat storage and release method for improving fused salt medium heat exchange power and reducing failure rate |
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