CN223882430U - Molten salt energy storage heating system - Google Patents
Molten salt energy storage heating systemInfo
- Publication number
- CN223882430U CN223882430U CN202520544326.4U CN202520544326U CN223882430U CN 223882430 U CN223882430 U CN 223882430U CN 202520544326 U CN202520544326 U CN 202520544326U CN 223882430 U CN223882430 U CN 223882430U
- Authority
- CN
- China
- Prior art keywords
- molten salt
- oil
- heat exchanger
- tank
- salt
- 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
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model discloses a molten salt energy storage heating system, which aims at solving the problems that the existing molten salt energy storage heating system is large in heat exchange area, a heat exchange surface is easy to be corroded by a heat exchange medium, phase change heat exchange is unstable and the like, and can reduce system investment by using a single-tank molten salt for storing heat, and can avoid arranging the heat exchange surface in a molten salt storage tank, occupying the internal volume of the tank and avoiding the problem that the heat exchange surface is difficult to maintain in the molten salt storage tank by using a molten salt pump for conveying molten salt into an oil salt heat exchanger. And the fused salt is used as a heat storage medium, and a fused salt electric heater and a fused salt pump are arranged in the fused salt tank. In the valley period or using new energy, the electric energy is abandoned, and the electric energy is converted into sensible heat of molten salt by the molten salt electric heater and stored in the molten salt tank. When the molten salt energy storage system releases heat, the silicone oil in the oil tank is conveyed to the oil salt heat exchanger to absorb heat, and meanwhile, the molten salt pump conveys the molten salt to the oil salt heat exchanger to release heat. And the silicone oil after absorbing heat enters an oil-water heat exchanger to transfer heat to heating circulating water, so that the whole heat release process is completed.
Description
Technical Field
The utility model belongs to the technical field of energy storage and heating, and particularly relates to a molten salt energy storage and heating system.
Background
The fused salt energy storage is a sensible heat storage technology, and utilizes the temperature difference of fused salt in the heating and cooling processes to realize energy storage and release, and the fused salt always keeps in a liquid state in the whole working temperature range.
The prior molten salt energy storage heating system uses a single tank to store molten salt, two circulating loops with different mediums are arranged on the inner side and the outer side of the molten salt tank, the volume utilization rate of the molten salt storage tank is improved, heat exchange mediums in the two circulating loops are opposite to the flowing direction of the molten salt storage tank, so that convection of molten salt in the tank is formed, upper heating and lower cooling of the molten salt in the storage tank are avoided, and the problems of insufficient heat storage and release of the single-tank oblique temperature layer heat storage system are solved. The circulating pipeline using water as a heat exchange medium is arranged on the outer side of the inner shell of the molten salt tank, so that the heat exchange coefficient is low, and the heat exchange area is large.
As another example, publication No. CN111911989a discloses a single-tank molten salt heat storage heating system, which uses a single tank to store molten salt heat, an aqueous medium heat exchange coil and foam metal are arranged in the molten salt storage tank, and the foam metal is welded on the heat exchange coil and used for enhancing the heat exchange coefficient in the molten salt phase change process. The defects are that after the molten salt is subjected to phase change and solidified, when the molten salt is heated by the electric heating element, the electric heating element is easy to be heated unevenly, and the faults such as burning out of the electric heating element or cracking of the molten salt tank body are caused.
Disclosure of utility model
The utility model aims to provide a molten salt energy storage heating system, which reduces the heat exchange area and ensures the stability of the heat exchange process.
In order to solve the problems, the technical scheme of the utility model is as follows:
A molten salt energy storage heating system comprises a molten salt tank, a molten salt electric heater, a molten salt pump, an oil-salt heat exchanger, an oil pump, an oil tank and an oil-water heat exchanger;
The molten salt electric heater is arranged in the molten salt tank, an inlet of the molten salt pump penetrates into the molten salt tank, and an outlet of the molten salt pump is communicated with a first inlet of the oil-salt heat exchanger;
The second inlet of the oil-salt heat exchanger is communicated with the oil tank through the oil pump, the first outlet of the oil-salt heat exchanger is communicated with the salt melting tank, and the second outlet of the oil-salt heat exchanger is communicated with the first inlet of the oil-water heat exchanger;
The second inlet of the oil-water heat exchanger is communicated with external water inlet, the first outlet of the oil-water heat exchanger is communicated with the oil tank, and the second outlet of the oil-water heat exchanger is communicated with external water supply.
According to the embodiment of the utility model, the molten salt tank is internally provided with the molten salt circulating pipeline, the inlet of the molten salt circulating pipeline is communicated with the outlet of the molten salt pump, and the molten salt pump and the molten salt circulating pipeline cooperate to realize uniform temperature in the molten salt tank.
According to the embodiment of the utility model, the molten salt circulating pipeline is arranged in a non-horizontal mode, so that molten salt in the molten salt circulating pipeline can flow back to the molten salt tank automatically.
According to the embodiment of the utility model, the porous solid filler is arranged in the molten salt tank, so that the temperature change in the heat release process of the molten salt tank is uniform and stable.
According to an embodiment of the utility model, the heat transfer medium in the oil salt heat exchanger, the oil pump and the oil tank is siloxane heat transfer oil, so as to ensure heat stability.
According to an embodiment of the utility model, the second inlet of the oil-water heat exchanger is communicated with heating circulating water or domestic water supply.
According to an embodiment of the utility model, the oil-water heat exchanger comprises a first oil-water heat exchanger and a second oil-water heat exchanger, wherein a first inlet of the first oil-water heat exchanger and a first inlet of the second oil-water heat exchanger are communicated with a second outlet of the oil salt heat exchanger;
The first outlet of the first oil-water heat exchanger and the first outlet of the second oil-water heat exchanger are communicated with the oil tank;
The second inlet of the first oil-water heat exchanger is communicated with the heating circulating water inlet, and the second outlet of the first oil-water heat exchanger is communicated with the heating circulating water supply;
and a second inlet of the second oil-water heat exchanger is communicated with the domestic water supply, and a second outlet of the second oil-water heat exchanger is communicated with the domestic water supply.
According to one embodiment of the utility model, the molten salt energy storage heating system further comprises a hot water boiler, wherein an inlet of the hot water boiler is communicated with heating backwater, and an outlet of the hot water boiler is communicated with heating water supply.
By adopting the technical scheme, the utility model has the following advantages and positive effects compared with the prior art:
According to the molten salt energy storage heating system, the problems that the heat exchange area is large, the heat exchange surface is easy to be corroded by a heat exchange medium, phase change heat exchange is unstable and the like of the existing molten salt energy storage heating system are solved, system investment can be reduced by using a single-tank molten salt for storing heat, molten salt is conveyed into an oil-salt heat exchanger by using a molten salt pump, the heat exchange surface is prevented from being arranged in a molten salt storage tank, the volume in the tank is occupied, and the problem that the heat exchange surface is difficult to maintain in the molten salt storage tank is also avoided. And the fused salt is used as a heat storage medium, and a fused salt electric heater and a fused salt pump are arranged in the fused salt tank. In the valley period or using new energy, the electric energy is abandoned, and the electric energy is converted into sensible heat of molten salt by the molten salt electric heater and stored in the molten salt tank. When the molten salt energy storage system releases heat, the silicone oil in the oil tank is conveyed to the oil salt heat exchanger to absorb heat, and meanwhile, the molten salt pump conveys the molten salt to the oil salt heat exchanger to release heat. And the silicone oil after absorbing heat enters an oil-water heat exchanger to transfer heat to heating circulating water, so that the whole heat release process is completed. The system is provided with the fused salt electric heater, so that peak-valley electricity price difference can be fully utilized, heating cost is reduced, or new energy is fully utilized to discard electricity, and energy utilization rate is improved. In addition, the oil medium is adopted for heat exchange, and compared with water which is used as the medium for heat exchange, the corrosion to equipment can be reduced.
Drawings
Fig. 1 is a schematic diagram of a molten salt energy storage heating system according to an embodiment of the utility model.
Reference numerals illustrate:
1, a salt melting tank; 2, an electric fused salt heater; 3, a molten salt pump; the molten salt heat exchanger comprises a molten salt circulating pipeline, a porous solid filler, an oil salt heat exchanger, an oil pump, an oil tank, a first oil-water heat exchanger, a second oil-water heat exchanger, a hot water boiler and a water tank, wherein the molten salt circulating pipeline, the porous solid filler, the oil salt heat exchanger, the oil pump, the oil tank, the first oil-water heat exchanger, the second oil-water heat exchanger, the water boiler and the water tank are respectively arranged in sequence, the porous solid filler is arranged in sequence, the oil salt heat exchanger, the oil pump, the first oil-water heat exchanger, the second oil-water heat exchanger, the water boiler and the water tank are respectively arranged in sequence.
Detailed Description
The molten salt energy storage heating system provided by the utility model is further described in detail below with reference to the accompanying drawings and specific embodiments. Advantages and features of the utility model will become more apparent from the following description and from the claims.
Referring to fig. 1, the embodiment provides a molten salt energy storage heating system, which comprises a molten salt tank 1, a molten salt electric heater 2, a molten salt pump 3, an oil-salt heat exchanger 6, an oil pump 7, an oil tank 8 and an oil-water heat exchanger;
The molten salt electric heater 2 is arranged in the molten salt tank 1, an inlet of the molten salt pump 3 penetrates into the molten salt tank 1, an outlet of the molten salt pump 3 is communicated with a first inlet of the oil-salt heat exchanger 6, a second inlet of the oil-salt heat exchanger 6 is communicated with the oil tank 8 through the oil pump 7, a first outlet of the oil-salt heat exchanger is communicated with the molten salt tank 1, and a second outlet of the oil-salt heat exchanger is communicated with a first inlet of the oil-water heat exchanger. The second inlet of the oil-water heat exchanger is communicated with external water inlet, the first outlet of the oil-water heat exchanger is communicated with the oil tank 8, and the second outlet of the oil-water heat exchanger is communicated with external water supply.
The system uses a single tank of molten salt for heat storage, so that the system investment can be reduced, and the molten salt is conveyed into the oil-salt heat exchanger by using the molten salt pump, so that the heat exchange surface is prevented from being arranged in the molten salt storage tank, the volume in the tank is occupied, and the problem that the heat exchange surface is difficult to maintain in the molten salt storage tank can be avoided. And the fused salt is used as a heat storage medium, and a fused salt electric heater and a fused salt pump are arranged in the fused salt tank. In the valley period or using new energy, the electric energy is abandoned, and the electric energy is converted into sensible heat of molten salt by the molten salt electric heater and stored in the molten salt tank. When the molten salt energy storage system releases heat, the silicone oil in the oil tank is conveyed to the oil salt heat exchanger to absorb heat, and meanwhile, the molten salt pump conveys the molten salt to the oil salt heat exchanger to release heat. And the silicone oil after absorbing heat enters an oil-water heat exchanger to transfer heat to heating circulating water, so that the whole heat release process is completed.
Further, a molten salt circulating pipeline 4 is further arranged in the molten salt tank 1, an inlet of the molten salt circulating pipeline 4 is communicated with an outlet of the molten salt pump 3, and the molten salt pump 3 and the molten salt circulating pipeline 4 cooperate to realize uniform temperature in the molten salt tank. Specifically, when the temperature measuring point set by the molten salt tank detects that the temperature difference of different areas of the tank body is large, the molten salt pump is required to be started to circularly flow the molten salt in the tank, so that the temperature of the molten salt in the tank is uniform. In addition, the molten salt circulating pipeline 4 is arranged in a non-horizontal mode, the pipeline has a certain gradient, molten salt in the pipeline is ensured to automatically flow back to the molten salt tank, and the molten salt is prevented from being solidified in the pipeline to generate frozen blockage.
Further, the porous solid filler is arranged in the molten salt tank 1, so that the temperature change in the heat release process of the molten salt tank is uniform and stable, and the cost can be reduced. The porous solid filler can be a medium such as rock, ceramic bricks, concrete and the like.
The system uses siloxane heat conduction oil as an intermediate heat transfer medium, the medium has good heat stability, no scaling at high temperature and low solidifying point (the solidifying point is lower than-40 ℃ and the working temperature range can be covered by-30 ℃ to 300 ℃), and the heat stability can be ensured by arranging the medium in an oil tank, an oil pump and an oil salt heat exchanger.
The external water may be heating circulating water or domestic water. That is, the second inlet of the oil-water heat exchanger in the system is communicated with heating circulating water or domestic water supply. Preferably, the oil-water heat exchanger comprises a first oil-water heat exchanger 9 and a second oil-water heat exchanger 10, wherein a first inlet of the first oil-water heat exchanger 9 and a first inlet of the second oil-water heat exchanger 10 are communicated with a second outlet of the oil salt heat exchanger 6;
the first outlet of the first oil-water heat exchanger 9 and the first outlet of the second oil-water heat exchanger 10 are communicated with the oil tank 8;
The second inlet of the first oil-water heat exchanger 9 is communicated with the heating circulating water inlet, the second outlet of the first oil-water heat exchanger is communicated with the heating circulating water supply, the second inlet of the second oil-water heat exchanger 10 is communicated with the domestic water supply, and the second outlet of the second oil-water heat exchanger is communicated with the domestic water supply.
Further, the molten salt energy storage heating system further comprises a hot water boiler 11, wherein an inlet of the hot water boiler 11 is communicated with heating backwater, and an outlet of the hot water boiler 11 is communicated with heating water supply. The hot water boiler 11 directly heats the heating circulating water during the valley power and the flat power periods, thereby improving the operation efficiency. And when the output of the fused salt energy storage system is insufficient, heating circulating water can be heated, and the operation flexibility of the system is improved.
In addition, the hot water boiler 11 may be connected to domestic water supply, heated and stored in the water tank 12 for domestic hot water.
The working mode of the molten salt energy storage heating system is described as follows:
And the operation mode 1 is a fused salt energy storage and heating mode. In the valley electricity period, an electric heater of the molten salt tank is started to heat molten salt in the tank, and the temperature of the molten salt is increased from 190 ℃ to 400 ℃ to realize energy storage. And meanwhile, the hot water boiler is used for heating the circulating water, and the circulating water is heated to 75 ℃ from 40 ℃, so that heating in the period is realized.
And the operation mode 2 is a fused salt heat release and heating mode. In the peak electricity period, the molten salt heat storage system releases heat, an oil pump and a molten salt pump are started, cold oil at 100 ℃ is sent into the oil salt heat exchanger to absorb heat, the temperature is increased to 240 ℃, hot oil enters the oil-water heat exchanger, and circulating water is heated to return water. In the flat electric period, the hot water boiler can be used for heating the circulating water, and the circulating water is heated from 40 ℃ to 75 ℃ so as to realize heating in the valley electric period.
And 3, an operation mode, namely a molten salt direct heating mode. The molten salt energy storage system stores and releases molten salt simultaneously, after the molten salt electric heater heats molten salt, heat is not stored and is transferred to silicone oil in the oil-salt heat exchanger, and the heated silicone oil is sent to the oil-water heat exchanger to heat circulating water.
And 4, a molten salt circulation mode. When the temperature measuring points arranged in the molten salt tank detect that the temperature difference of different areas of the tank body is large, the molten salt pump is required to be started to circularly flow the molten salt in the tank, so that the temperature of the molten salt in the tank is uniform. The molten salt circulating pipelines are all provided with a certain gradient, so that molten salt can automatically flow back into the molten salt tank, and the molten salt is prevented from being solidified in the pipelines to generate frozen blockage.
And 5, a molten salt heat preservation mode. When the molten salt heat storage system is not suitable for a non-heating season or long time, the temperature in the molten salt tank is required to be maintained at about 190 ℃ so as to prevent molten salt from solidifying. When the temperature detected by the temperature measuring point in the molten salt tank is lower than 190 ℃, the electric heater for the molten salt is started in the nearby valley period, the molten salt in the tank is heated, and solidification of the molten salt is prevented.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments. Even if various changes are made to the present utility model, it is within the scope of the appended claims and their equivalents to fall within the scope of the utility model.
Claims (8)
1. The molten salt energy storage heating system is characterized by comprising a molten salt tank, a molten salt electric heater, a molten salt pump, an oil-salt heat exchanger, an oil pump, an oil tank and an oil-water heat exchanger;
The molten salt electric heater is arranged in the molten salt tank, an inlet of the molten salt pump penetrates into the molten salt tank, and an outlet of the molten salt pump is communicated with a first inlet of the oil-salt heat exchanger;
The second inlet of the oil-salt heat exchanger is communicated with the oil tank through the oil pump, the first outlet of the oil-salt heat exchanger is communicated with the salt melting tank, and the second outlet of the oil-salt heat exchanger is communicated with the first inlet of the oil-water heat exchanger;
The second inlet of the oil-water heat exchanger is communicated with external water inlet, the first outlet of the oil-water heat exchanger is communicated with the oil tank, and the second outlet of the oil-water heat exchanger is communicated with external water supply.
2. The molten salt energy storage heating system of claim 1, wherein a molten salt circulating pipeline is further arranged in the molten salt tank, an inlet of the molten salt circulating pipeline is communicated with an outlet of the molten salt pump, and the molten salt pump and the molten salt circulating pipeline cooperate to realize uniform temperature in the molten salt tank.
3. The molten salt energy storage heating system of claim 2, wherein the molten salt circulation conduit is non-horizontally disposed to ensure that molten salt in the vessel automatically flows back to the molten salt tank.
4. The molten salt energy storage heating system of claim 1, wherein a porous solid filler is disposed in the molten salt tank to uniformly stabilize temperature changes during the heat release of the molten salt tank.
5. The molten salt energy storage heating system of claim 1, wherein silicone heat transfer oil is used as a heat transfer medium in the oil salt heat exchanger, oil pump and oil tank to ensure thermal stability.
6. The molten salt energy storage heating system of claim 1, wherein the second inlet of the oil-water heat exchanger is in communication with heating circulating water, or with domestic feedwater.
7. The molten salt energy storage heating system of claim 1, wherein the oil-water heat exchanger comprises a first oil-water heat exchanger and a second oil-water heat exchanger, the first inlet of the first oil-water heat exchanger and the first inlet of the second oil-water heat exchanger are communicated with the second outlet of the oil salt heat exchanger;
The first outlet of the first oil-water heat exchanger and the first outlet of the second oil-water heat exchanger are communicated with the oil tank;
The second inlet of the first oil-water heat exchanger is communicated with the heating circulating water inlet, and the second outlet of the first oil-water heat exchanger is communicated with the heating circulating water supply;
and a second inlet of the second oil-water heat exchanger is communicated with the domestic water supply, and a second outlet of the second oil-water heat exchanger is communicated with the domestic water supply.
8. The molten salt energy storage heating system of claim 7, further comprising a hot water boiler, an inlet of the hot water boiler being in communication with the heating return water, an outlet of the hot water boiler being in communication with the heating feedwater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520544326.4U CN223882430U (en) | 2025-03-26 | 2025-03-26 | Molten salt energy storage heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520544326.4U CN223882430U (en) | 2025-03-26 | 2025-03-26 | Molten salt energy storage heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223882430U true CN223882430U (en) | 2026-02-06 |
Family
ID=98635014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202520544326.4U Active CN223882430U (en) | 2025-03-26 | 2025-03-26 | Molten salt energy storage heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223882430U (en) |
-
2025
- 2025-03-26 CN CN202520544326.4U patent/CN223882430U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204421399U (en) | A kind of energy storage type solar superheated steam boiler adopting Molten Salt Heat Transfer heat accumulation | |
| CN204187875U (en) | A kind of energy storage type solar hot-water boiler adopting heat-conducting oil | |
| CN204705041U (en) | A kind of Instant heating type phase-change accumulation energy water heater | |
| CN101464108A (en) | Corrugated phase-change heat accumulation element | |
| CN104266358A (en) | Fused salt energy storage heating heat-exchange system | |
| CN104864613A (en) | Heat storage device | |
| CN119223057A (en) | Single-tank molten salt heat storage system and method | |
| CN201443848U (en) | Efficient superconducting and energy storing electric water heater | |
| CN208382321U (en) | A kind of molten salt energy-storage heating system with fused salt static mixer | |
| CN204063575U (en) | A kind of molten salt energy-storage heating heat-exchange system | |
| CN110553236B (en) | Heat storage electric boiler system and heat charging operation method thereof | |
| CN108534222A (en) | A kind of molten salt energy-storage heating system with fused salt static mixer | |
| CN223882430U (en) | Molten salt energy storage heating system | |
| CN201212739Y (en) | Air-energy powerless fast exchanging water heater | |
| CN110388682B (en) | A low valley electric heating heat transfer oil and molten salt co-heat storage heating system | |
| CN219656684U (en) | Single tank type heat storage system | |
| CN220472405U (en) | Modularized distributed double-tank high-temperature molten salt heat energy storage system with salt dissolving function | |
| CN215413330U (en) | Molten salt tank steam tracing and foundation cooling system | |
| CN108317755A (en) | A kind of solar energy high temperature hot water supply system | |
| CN209386264U (en) | High temperature modification energy storage electric boiler | |
| CN208139235U (en) | New heat pipe steam boiler | |
| CN210197440U (en) | Heat accumulating type electric heater | |
| CN115854314A (en) | Sensible heat storage-latent heat storage coupled heat storage and steam supply system and operation method thereof | |
| CN209054627U (en) | A kind of fused salt accumulation of heat electrically heated boiler | |
| CN201885297U (en) | Solar floor heating and hot water supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |