CN221036981U - Electrical heating fused salt heat storage system - Google Patents
Electrical heating fused salt heat storage system Download PDFInfo
- Publication number
- CN221036981U CN221036981U CN202322943901.1U CN202322943901U CN221036981U CN 221036981 U CN221036981 U CN 221036981U CN 202322943901 U CN202322943901 U CN 202322943901U CN 221036981 U CN221036981 U CN 221036981U
- Authority
- CN
- China
- Prior art keywords
- salt
- pipeline
- cold
- tank
- hot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 176
- 238000010438 heat treatment Methods 0.000 title claims abstract description 31
- 238000005338 heat storage Methods 0.000 title claims abstract description 20
- 238000002844 melting Methods 0.000 claims abstract description 20
- 230000008018 melting Effects 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 2
- 210000003437 trachea Anatomy 0.000 claims description 2
- 238000005485 electric heating Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Other Air-Conditioning Systems (AREA)
Abstract
The utility model relates to an electric heating molten salt heat storage system which comprises a cold salt tank, a salt melting heater, a cold salt pump, a high-temperature heating tank, a high-temperature electric heater, a hot salt tank, a hot salt pump and a heat exchanger, wherein a first pipeline, a second pipeline and a third pipeline for conveying liquid molten salt are arranged between the cold salt tank and the hot salt tank, the first pipeline and the second pipeline are simultaneously connected into an air inlet pipe, the bottoms of the cold salt tank and the hot salt tank are respectively connected with a first air outlet pipe and a second air outlet pipe, and a communication air pipe is further arranged between the high-temperature heating tank and the cold salt tank. The utility model has the function of gas replacement, ensures the inert environment in the use of molten salt, improves the safety and avoids explosion risk; the molten salt cooling system has the salt dredging function, molten salt of the whole system can be conveyed to a cold salt tank for storage when the system is stopped, electric tracing is not required to be paved on the whole pipe network, energy saving and consumption reduction can be achieved, and the risk of pipe blockage caused by molten salt cooling can be avoided.
Description
Technical Field
The utility model relates to the technical field of energy storage, in particular to an electric heating molten salt heat storage system.
Background
The molten salt is an ideal heat storage medium, and has the characteristics of high energy storage density, wide raw material sources, high available temperature range, excellent flow and heat exchange characteristics and the like. The prior fused salt heat storage system has the following common problems: when the molten salt is in shutdown of the system, electric tracing needs to be paved on the cold salt tank and the hot salt tank, the risk of pipe blockage caused by molten salt cooling is prevented, and the energy consumption is high. In addition, before formally exerting the energy storage effect, the molten salt needs to be heated from the normal-temperature granular state to the molten state, and the molten salt is heated unevenly in the heating process, so that local high temperature can occur, physical properties are unstable after salt dissolution, the molten salt is decomposed, material waste is caused, and safety risks can be brought.
Disclosure of Invention
The utility model aims to overcome the defects, and provides an electric heating molten salt heat storage system which can consume renewable electric energy such as solar energy, wind power and the like, improve the utilization rate of the electric energy in heating and industrial production, reduce the consumption of fossil fuels such as methane and the like, greatly reduce the emission of nitrogen oxides and carbon dioxide, and has better economic and social benefits.
The purpose of the utility model is realized in the following way:
The utility model provides an electrical heating fused salt heat accumulation system, includes cold salt tank, salt melting heater, cold salt pump, high temperature heating jar, high temperature electric heater, hot salt tank, hot salt pump and heat exchanger, be equipped with first pipeline, second pipeline and the third pipeline that supplies liquid fused salt to carry between cold salt tank and the hot salt tank, first pipeline, second pipeline access intake pipe simultaneously, first outlet duct and second outlet duct are connected respectively to cold salt tank and hot salt tank bottom, still be equipped with the intercommunication trachea between high temperature heating jar and the cold salt tank.
Preferably, the first pipeline is provided with a high-temperature heating tank and a first electric valve, the inlet end of the high-temperature heating tank is connected with a cold salt pump inserted into the cold salt tank, the second pipeline is provided with a heat exchanger and a second electric valve, the inlet end of the heat exchanger is connected with a hot salt pump inserted into the hot salt tank, the third pipeline is provided with a third electric valve, and the inlet end of the third pipeline is connected with the hot salt pump.
Preferably, a fourth electric valve is arranged on the air inlet pipe, a fifth electric valve is arranged on the communication air pipe, a sixth electric valve is arranged on the first air outlet pipe, and a seventh electric valve is arranged on the second air outlet pipe.
Preferably, the cold salt pump and the hot salt pump are submerged pumps, and the bottom of the pumps is 100mm away from the bottom of the corresponding tank body.
Preferably, 3 salt dissolving electric heaters are arranged in the cold salt tank, and the 3 salt dissolving electric heaters are uniformly distributed in the cold salt tank along the circumferential direction.
Preferably, a stirrer is arranged in the center of the cold salt tank, and the stirrer comprises three bending blades uniformly distributed in the circumferential direction.
The beneficial effects of the utility model are as follows:
1. The system has the function of melting salt by using the granular molten salt, so that the risk brought by injecting the high-temperature molten salt into the system after the external molten salt melting is avoided;
2. The system has the gas replacement function, ensures the inert environment in the use of molten salt, improves the safety and avoids explosion risks;
3. The system has a salt dredging function, molten salt of the whole system can be conveyed to a cold salt tank for storage when the system is stopped, electric tracing is not required to be paved on the whole pipe network, energy saving and consumption reduction can be realized, and the risk of pipe blockage caused by molten salt cooling can be avoided;
4. The system realizes the application of the molten salt heat storage system in the fields of heating and industrial steam, can reduce the consumption of fossil fuels such as methane and the like, and greatly reduces the emission of nitrogen oxides and carbon dioxide;
5. The system adopts liquid molten salt as heat storage and heat exchange medium, and the flow characteristic of the system realizes higher heat exchange efficiency and heat output power, and can generate hot water and medium-low pressure steam according to requirements.
6. The plurality of salt melting electric heaters are uniformly distributed in the circumferential direction, so that the heating power can be uniformly released, and the heating rate can be flexibly controlled by adjusting the heating power; the stirrer can adjust the frequency at different stages of salt melting so as to realize slow transition of materials in the cold salt tank from particles to liquid state, prevent the local temperature from being too low or too high, ensure stable physical properties after salt melting and prevent decomposition; the method can realize slow and uniform temperature rise of the fused salt heat storage medium in the salt melting process, and prevent local low temperature and high temperature.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Wherein: a cold salt tank 1; a salt-melting heater 2; a cold salt pump 3; a high temperature heating tank 4; a high-temperature electric heater 5; a hot salt tank 6; a hot salt pump 7; a heat exchanger 8; a first electrically operated valve 9; a second electrically operated valve 10; a third electrically operated valve 11; a fourth electrically operated valve 12; a fifth electrically operated valve 13; a sixth electrically operated valve 14; a seventh electric valve 15; an intake pipe 16; a first outlet duct 17; a second outlet duct 18; a stirrer 19.
Description of the embodiments
Referring to fig. 1, the utility model relates to an electric heating molten salt heat storage system, which comprises a cold salt tank 1, a hot salt tank 6, a high-temperature heating tank 4 and a heat exchanger 8, wherein the cold salt tank 1 is provided with a salt melting heater 2 and a cold salt pump 3, the salt melting heater 2 is arranged in the cold salt tank 1, the hot salt tank 6 is provided with the hot salt pump 7, a first pipeline, a second pipeline and a third pipeline are arranged between the cold salt tank 1 and the hot salt tank 6, the first pipeline is provided with the high-temperature heating tank 4 and a first electric valve 9, the inlet end of the high-temperature heating tank 4 is connected with the cold salt pump 3 inserted into the cold salt tank 1, the high-temperature electric heater 5 is arranged in the high-temperature heating tank 4, the second pipeline is provided with the heat exchanger 8 and a second electric valve 10, the inlet end of the heat exchanger 8 is connected with the hot salt pump 7 inserted into the hot salt tank 6, the third pipeline is provided with a third electric valve 11, the inlet end of the third pipeline is connected with the hot salt pump 7, the first pipeline, the second pipeline is connected with the second electric valve 16, the air outlet pipe 16 is provided with the air inlet pipe 6, the third pipeline is provided with the air inlet pipe 17, the air outlet pipe 1 is provided with the air outlet pipe 17 is communicated with the fifth electric valve 17, and the bottom is further provided with the air outlet pipe 1, and the air outlet pipe 1 is provided with the air outlet pipe 17, and the air outlet pipe is provided with the air outlet pipe 1 is provided with the air outlet 17, and the air outlet pipe is provided with the air outlet 17, and the bottom is communicated with the air valve 17.
The first pipeline, the second pipeline and the third pipeline form a pipe network for conveying liquid molten salt, and the air inlet pipe, the communication air pipe, the first air outlet pipe and the second air outlet pipe form a gas channel for conveying nitrogen.
The cold salt pump 3 and the hot salt pump 7 are submerged pumps, and the bottom of the pumps is 100mm away from the bottom of the corresponding tank body.
The molten salt medium in the cold salt tank 1 is ternary salt, the composition of the molten salt medium is 53% potassium nitrate, 40% sodium nitrite and 7% sodium nitrate, the melting point is 142 ℃, and the decomposition temperature is 535 ℃.
The molten salt in the cold salt tank 1 was maintained at 160 ℃ and the molten salt in the hot salt tank 6 was maintained at 515 ℃.
The salt dissolving electric heaters 2 in the cold salt tank 1 are provided with 3, the 3 salt dissolving electric heaters 2 are uniformly distributed in the cold salt tank 1 along the circumferential direction, the heating power can be ensured to be uniformly released, and the heating rate can be flexibly controlled by adjusting the heating power.
A stirrer 19 is arranged in the center of the cold salt tank 1, and the stirrer 19 comprises three bending blades uniformly distributed in the circumferential direction. The stirrer 19 can adjust the frequency at different stages of salt formation to realize slow transition of materials in the cold salt tank from particles to liquid state, prevent local temperature from being too low or too high, ensure stable physical properties after salt formation and prevent decomposition.
The electric power of the salt melting electric heater 2 is regulated to be gradually increased, and the granular molten salt in the cold salt tank 1 is heated to slowly rise the temperature to the melting temperature. In the process, the rotation speed of the stirrer 19 is adjusted from high to low according to three different states of pure particles, a mixture of particles and liquid and pure liquid, and the uniformity of a temperature field is promoted by disturbance until salt formation is completed.
The working flow of the electric heating molten salt heat storage system is as follows:
Salt dissolving stage: when the salt melting stage starts, all the electric valves are opened, external nitrogen enters the system through the air inlet pipe 16, a pipe network and all devices are further filled, air is replaced, air is discharged out of the system from the air outlet pipe 11, inert environment in molten salt use is guaranteed, safety is improved, materials in the cold salt tank 1 are granular mixtures, the salt melting electric heater 2 is started to heat the molten salt, when the temperature is higher than 142 ℃, the molten salt becomes liquid, the temperature is further raised to 160 ℃ to prevent condensation, and the salt melting is ended.
And (3) heat storage: and when the heat storage stage starts, closing the rest electric valves, only keeping the first electric valve 9 open, and sending the liquid molten salt into the high-temperature heating tank 4 by the cold salt pump 3, heating the molten salt to 515 ℃ by the high-temperature electric heater 5, and then sending the molten salt into the hot salt tank 6, so that the heat storage is finished.
Exothermic phase: when the heat release stage starts, the rest of the electric valves are closed, only the second electric valve 10 is kept open, the hot salt pump 7 sends the liquid molten salt into the heat exchanger 8, the molten salt exchanges heat with the cold medium to 160 ℃ and then flows back into the cold salt tank 1, and the process can generate hot water for heating or generate medium-low pressure steam for industrial production according to the requirement, so that the heat release is finished.
The system pauses the operation phase: after the end of the exothermic phase, if the system does not need to be operated for a longer period of time, the remaining electrically operated valves are opened, only the third electrically operated valve 11 is kept closed. The external nitrogen enters the system through the air inlet pipe 16 so as to fill the pipe network, and molten salt in the system is discharged into the cold salt tank 1 and the hot salt tank 6; then closing the rest of the electric valves, only keeping the third electric valve 11 open, starting the hot salt pump 7 to send molten salt in the hot salt tank 6 into the cold salt tank 1, and discharging redundant nitrogen from each exhaust pipe to the system; and then intermittently starting the salt melting electric heater 2 to maintain the temperature of the molten salt to be not lower than 160 ℃, wherein all the molten salt in the system is in the cold salt tank 1, and ensuring that the molten salt cannot be condensed.
In addition to the above embodiments, the present utility model also includes other embodiments, and all technical solutions that are formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present utility model.
Claims (6)
1. The utility model provides an electrical heating fused salt heat accumulation system, includes cold salt jar (1), salt melting heater (2), cold salt pump (3), high temperature heating jar (4), high temperature electric heater (5), hot salt jar (6), hot salt pump (7) and heat exchanger (8), its characterized in that: be equipped with first pipeline, second pipeline and the third pipeline that supplies liquid fused salt to carry between cold salt jar (1) and hot salt jar (6), first pipeline, second pipeline insert intake pipe (16) simultaneously, first outlet duct and second outlet duct (17) are connected respectively to cold salt jar (1) and hot salt jar (6) bottom, still be equipped with the intercommunication trachea between high temperature heating jar (4) and cold salt jar (1).
2. An electrically heated molten salt heat storage system as claimed in claim 1 wherein: be equipped with high temperature heating jar (4) and first motorised valve (9) on the first pipeline, cold salt pump (3) of cold salt jar (1) are inserted in high temperature heating jar (4) entry end connection, be equipped with heat exchanger (8) and second motorised valve (10) on the second pipeline, heat exchanger (8) entry end connection inserts hot salt pump (7) of hot salt jar (6), be equipped with third motorised valve (11) on the third pipeline, third pipeline entry end connection hot salt pump (7).
3. An electrically heated molten salt heat storage system as claimed in claim 1 or claim 2 wherein: the air inlet pipe (16) is provided with a fourth electric valve (12), the communication air pipe is provided with a fifth electric valve (13), the first air outlet pipe (17) is provided with a sixth electric valve (14), and the second air outlet pipe (18) is provided with a seventh electric valve (15).
4. An electrically heated molten salt heat storage system as claimed in claim 1 wherein: the cold salt pump (3) and the hot salt pump (7) are submerged pumps, and the bottom of the pumps is 100mm away from the bottom of the corresponding tank body.
5. An electrically heated molten salt heat storage system as claimed in claim 1 wherein: the salt melting electric heaters (2) in the cold salt tank (1) are 3, and the 3 salt melting electric heaters (2) are uniformly distributed in the cold salt tank (1) along the circumferential direction.
6. An electrically heated molten salt heat storage system as claimed in claim 1 or claim 5 wherein: the center of the cold salt tank (1) is provided with a stirrer (19), and the stirrer (19) comprises three bending blades uniformly distributed in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322943901.1U CN221036981U (en) | 2023-11-01 | 2023-11-01 | Electrical heating fused salt heat storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322943901.1U CN221036981U (en) | 2023-11-01 | 2023-11-01 | Electrical heating fused salt heat storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221036981U true CN221036981U (en) | 2024-05-28 |
Family
ID=91187749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322943901.1U Active CN221036981U (en) | 2023-11-01 | 2023-11-01 | Electrical heating fused salt heat storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221036981U (en) |
-
2023
- 2023-11-01 CN CN202322943901.1U patent/CN221036981U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204187874U (en) | A kind of energy storage type solar steam boiler adopting heat-conducting oil | |
| CN204963632U (en) | High temperature energy storage fused salt jar that contains heat transfer, heating system | |
| CN216814312U (en) | Single-tank thermocline heat storage molten salt heating system | |
| CN221036981U (en) | Electrical heating fused salt heat storage system | |
| CN108088297A (en) | A kind of assembly type subregion modularization phase-change heat storage device and its preparation | |
| CN208487675U (en) | A kind of novel molten salt and solid joint energy storage heating system | |
| CN213295524U (en) | Circulating water comprehensive heat treatment system of hydrogen production device | |
| CN212109580U (en) | High-temperature flue gas waste heat utilization system based on fused salt heat storage technology | |
| CN203242705U (en) | Small hydrogen production and power generation equipment | |
| CN116576441A (en) | Energy storage system and tower type solar thermal power generation system | |
| CN114837757B (en) | High-water-adding bypass frequency modulation system of thermal power plant provided with steam ejector and working method | |
| CN215655068U (en) | Salt melting system of molten salt thermal energy storage power station | |
| CN101906636B (en) | Method for heating titanium strip rinsing liquid by using microwave heater | |
| CN111188996B (en) | Low-temperature waste heat recovery device of LNG receiving station submerged combustion type gasifier | |
| CN113274949A (en) | Salt melting system of molten salt thermal energy storage power station | |
| CN110499517B (en) | Intelligent temperature control cooling water supply system for hydrogen production by electrolysis of hydropower station | |
| CN205379874U (en) | Reation kettle refrigeration cycle water system | |
| CN217818303U (en) | Multi-storage-tank series preheating system of photo-thermal power station | |
| CN217052431U (en) | Circulating heat exchange system | |
| CN204165435U (en) | A kind of without the free of contamination liquid heat energy energy storage device of discharge | |
| CN220041931U (en) | Hydrogen storage tank temperature control system of hydrogen fuel cell | |
| CN213416385U (en) | Novel special water of combustion engine reforms transform equipment | |
| CN216790134U (en) | Fused salt heat storage coupling pure condensation thermal power unit system capable of realizing zero output | |
| CN215295378U (en) | Solar photo-thermal power station salt melting system based on natural gas heat-conducting oil furnace | |
| CN203655545U (en) | Organic working medium power generation system with solar heat storage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |