CN216620305U - Fused salt electric heating system - Google Patents
Fused salt electric heating system Download PDFInfo
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- CN216620305U CN216620305U CN202122684879.4U CN202122684879U CN216620305U CN 216620305 U CN216620305 U CN 216620305U CN 202122684879 U CN202122684879 U CN 202122684879U CN 216620305 U CN216620305 U CN 216620305U
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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
- 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
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Abstract
The utility model provides a molten salt electric heating system, which relates to the technical field of chemical mechanical equipment, can realize the quick and efficient heating of molten salt, reduce the energy loss of an electric heater and obviously improve the molten salt electric heating efficiency; the system comprises an electrode heater for heating electrolyte solution, a heat exchanger for realizing heat exchange between the electrolyte solution and molten salt, a hot salt tank for storing the heated molten salt and a cold salt tank for storing the molten salt to be heated; the electrode heater, the hot salt tank and the cold salt tank are communicated with the heat exchanger through pipelines; and an electrode for electrifying and heating and the electrolyte solution are arranged in the electrode heater, and the electrolyte solution circularly flows between the electrode heater and the heat exchanger. The technical scheme provided by the utility model is suitable for the process of heat storage of the molten salt.
Description
Technical Field
The utility model relates to the technical field of chemical mechanical equipment, in particular to a molten salt electric heating system.
Background
With the gradual implementation of the national double-carbon target, the thermal power generation space with serious pollution is compressed, and the industrial scale of new energy power generation such as wind power, photovoltaic and the like is gradually enlarged to meet the requirement of a power load system. And the instability of new energy power generation such as wind power, photovoltaic and the like causes that the new energy power generation cannot realize power supply in the whole time. Unstable electric energy can be stored through the molten salt electric heating technology, and electricity is generated again in a required time period, so that the requirement of full-time power supply is met.
The conventional molten salt electric heating mostly adopts a resistance type heating method, and the main defects exist at present: the safety is poor, when the medium is lacked, the dry burning phenomenon is easy to occur, and the resistance wire is easy to damage due to over-temperature; short service life, frequent replacement of resistance heating wire and high price. The electrode heating is to directly insert the electrode into the medium, and the electric energy is directly converted into the heat energy of the medium by utilizing the high resistance characteristic of the medium, so that almost no energy loss exists in the conversion process; it can automatically power off when lacking the medium, can not appear dry combustion method phenomenon, and the security is high. However, electrode heating requires a conductor as a medium and has low conductivity, while molten salt has high conductivity and is difficult to directly heat by using an electrode.
Accordingly, there is a need to develop a new molten salt electric heating system to address the deficiencies of the prior art to address or mitigate one or more of the problems set forth above.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a molten salt electric heating system, which can realize rapid and efficient heating of molten salt, reduce energy loss of an electric heater, and significantly improve the molten salt electric heating efficiency.
The utility model provides a molten salt electric heating system, which comprises an electrode heater, a heat exchanger, a hot salt tank and a cold salt tank, wherein the electrode heater is used for heating an electrolyte solution, the heat exchanger is used for realizing heat exchange between the electrolyte solution and molten salt, the hot salt tank is used for storing the heated molten salt, and the cold salt tank is used for storing the molten salt to be heated;
the electrode heater, the hot salt tank and the cold salt tank are communicated with the heat exchanger through pipelines;
and an electrode for electrifying and heating and the electrolyte solution are arranged in the electrode heater, and the electrolyte solution circularly flows between the electrode heater and the heat exchanger.
The above aspect and any possible implementation manner further provide an implementation manner, wherein a circulation pump for providing power for electrolyte solution delivery is arranged on a pipeline between the electrode heater and the heat exchanger.
The above aspect and any possible implementation manner further provide an implementation manner, and a cold salt pump for providing power for molten salt transportation is arranged in the cold salt tank or on a pipeline for transporting the molten salt to be heated.
The above aspect and any possible implementation further provide an implementation in which the electrode heater is in a tank shape, the top of the tank shape is provided with an electrolyte solution outlet, and the bottom of the tank shape is provided with an electrolyte solution inlet;
an electrolyte solution outlet of the electrode heater is communicated with an electrolyte solution inlet of the heat exchanger through a pipeline;
and an electrolyte solution inlet of the electrode heater is communicated with an electrolyte solution outlet of the heat exchanger through a pipeline.
The above aspect and any possible implementation further provide an implementation in which the electrolyte solution inlet of the heat exchanger is provided at the top of the heat exchanger, and the electrolyte solution outlet of the heat exchanger is provided at the bottom of the heat exchanger.
The above aspect and any possible implementation further provides an implementation in which the heat exchanger is provided at an intermediate position between the electrode heater, the hot salt tank, and the cold salt tank.
The above aspect and any possible implementation manner further provide an implementation manner, wherein a cold molten salt inlet is arranged at the bottom of the heat exchanger, and a hot molten salt outlet is arranged at the top of the heat exchanger; the cold molten salt inlet is communicated with the cold salt tank through a pipeline, and the hot molten salt outlet is communicated with the hot salt tank through a pipeline.
The above aspects and any possible implementations further provide an implementation where a depth of placement of the electrode within the electrode heater is adjustable.
The above aspect and any possible implementation manner further provide an implementation manner that a heating power supply connected to the electrode satisfies a condition including: the voltage is more than or equal to 6 KV.
The above aspect and any possible implementation further provide an implementation in which the electrode is powered at 10 KV.
The above aspect and any possible implementation further provide an implementation, wherein the electrolyte solution is electrolyte water or silicone oil.
Compared with the prior art, one of the technical schemes has the following advantages or beneficial effects: the electrode heating is applied to molten salt heating, and the heating of the electrode on the molten salt is indirectly realized by adopting a mode of heating an electrolyte solution and then exchanging heat of the electrolyte solution and the molten salt;
another technical scheme in the above technical scheme has the following advantages or beneficial effects: the electrode heating fused salt has high heating efficiency, safety and reliability.
Of course, it is not necessary for any one product in which the utility model is practiced to achieve all of the above-described technical effects simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a molten salt electric heating system according to an embodiment of the utility model.
Wherein, in the figure:
1. an electrode heater; 2. an electrolyte solution; 3. a heat exchanger; 4. a hot salt tank; 5. melting a salt; 6. a cold salt tank; 7. a cold salt pump; 8. and a circulating pump.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The molten salt electric heating system comprises an electrode heater, an electrolyte solution, a heat exchanger, a hot salt tank, molten salt, a cold salt tank, a cold salt pump and a circulating pump. The electrolyte solution is heated by an electrode heater, is led out after the temperature is raised, and enters a heat exchanger; meanwhile, low-temperature molten salt is pumped into a heat exchanger through a cold salt pump; in the heat exchanger, the electrolyte solution at high temperature and the low-temperature molten salt are subjected to heat exchange, the molten salt is heated and heated, then the molten salt enters a hot salt tank for storage, and the cooled electrolyte solution returns to the electrode heater under the power action of the circulating pump to be reheated, so that the circulation is completed. So far, the electric heating process of the molten salt is indirectly realized.
The electrode heater adopts a power supply mode of medium-high voltage power supply to realize the heating of the electrolyte solution.
The electrolyte solution used in the molten salt electric heating system of the utility model can be electrolyte water, silicon oil and the like.
Example 1:
as shown in fig. 1, the molten salt electric heating system of the utility model is composed of an electrode heater 1, an electrolyte solution 2, a heat exchanger 3, a hot salt tank 4, a molten salt 5, a cold salt tank 6, a cold salt pump 7 and a circulating pump 8.
The electrode heater 1 includes a can-shaped case and positive and negative electrodes provided in the case for heating. The top of the tank-shaped shell is provided with an electrolyte solution outlet which is communicated with the heat exchanger 3 through a pipeline, so that the high-temperature electrolyte solution is transferred from the electrode heater to the heat exchanger. The bottom of the tank-shaped shell is provided with an electrolyte solution inlet which is communicated with the heat exchanger 3 through a pipeline, so that the low-temperature electrolyte solution cooled in the heat exchanger returns to the electrode heater for reheating. The longitudinal position of the electrode is adjustable, and the specific adjusting mode can be used for carrying out multi-position setting on the electrode fixing device, so that the electrode is fixed on the fixing device required by the heating work as required. Fixing device form is various, can adopt the insulator to support the buckle, fixes the electrode through the joint mode, also can be other fixed modes, and it is unnecessary here to describe again.
The heat exchanger 3 is arranged among the electrode heater 1, the hot salt tank 4 and the cold salt tank 6, and the heat exchanger 3 is respectively connected with an electrolyte solution inlet and an electrolyte solution outlet of the electrode heater 1, a molten salt inlet of the hot salt tank 4 and a molten salt outlet of the cold salt pump 7.
The cold salt pump 7 is arranged in the cold salt tank 6 or on the molten salt conveying pipeline and used for pumping the low-temperature molten salt in the cold salt tank 6 into the heat exchanger 3.
The circulating pump 8 is arranged on a pipeline from the heat exchanger 3 to the electrode heater 1, and provides power for the circulation of the electrolyte solution after being electrified.
The electrolyte solution 2 used in the molten salt electric heating system in this embodiment is silicone oil. When the electric heating system operates, 10KV high-voltage electricity is directly connected to the electrode of the electrode heater 1, so that current is generated in the silicon oil serving as the electrolyte solution to heat, the temperature is increased, and the high-temperature silicon oil enters the heat exchanger 3 through the pipeline. Meanwhile, the cold salt pump 7 provides power to pump the low-temperature molten salt in the cold salt tank 6 into the heat exchanger 3. In the heat exchanger 3, high temperature silicon oil and microthermal fused salt carry out the heat exchange, realize the heating to fused salt 5, fused salt 5 gets into hot salt jar 4 through transfer line after heating up to temperature and stores and carry out follow-up use, and the refrigerated electrolyte solution 2 silicon oil of heat exchange passes through the pipeline and locates circulating pump 8 on the pipeline in the heat exchanger 3 and returns to electrode heater 1 in and continue to be heated, realizes the circulation, indirectly accomplishes the electrical heating process of fused salt.
The utility model has the following beneficial effects:
1. the heating efficiency is high, the electrode heating directly uses electrolyte solution as a conductive medium, electric energy is directly converted into heat energy of the medium, almost no energy loss exists in the conversion process, and the heat loss is small in the process of transferring the heat of the electrolyte to molten salt through the heat exchanger.
2. The safety is high, the electrolyte with low conductivity is used as the object of electrode heating, and when the medium is lacked, the path between the electrodes is cut off, and the dry burning phenomenon can not occur.
3. The electrode heats the fused salt, the heating voltage can adopt medium-high voltage, the voltage is usually more than or equal to 6KV, and when high-power fused salt heating equipment is realized, compared with resistance-type heating voltage (usually 380/220V), the cost of a transformer, a power distribution device and a cable can be greatly reduced, and the electrode is more suitable for high-power fused salt heat storage occasions.
4. The starting speed is high, the service life of the electrode is generally longer than that of a resistance wire, and the operation reliability is high.
5. The size of the heating power of the boiler can be changed by controlling the contact area (such as the height of the liquid level) of the electrode and the electrolyte solution, and the adjusting mode belongs to stepless adjustment, is quick to start and is more stable than stage type power adjustment of resistance heating.
The molten salt electric heating system provided by the embodiment of the application is described in detail above. It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
The terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In this application, the terms "upper", "lower", "left", "right", "inner", "outer", "center", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. Some of the above terms may be used to indicate other meanings in addition to orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of dependency or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate. The term "and/or" as used herein is merely an associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Claims (10)
1. A molten salt electric heating system is characterized by comprising an electrode heater for heating electrolyte solution, a heat exchanger for realizing heat exchange between the electrolyte solution and molten salt, a hot salt tank for storing the heated molten salt and a cold salt tank for storing the molten salt to be heated;
the electrode heater, the hot salt tank and the cold salt tank are communicated with the heat exchanger through pipelines;
and an electrode for electrifying and heating and the electrolyte solution are arranged in the electrode heater, and the electrolyte solution circularly flows between the electrode heater and the heat exchanger.
2. A molten salt electric heating system as claimed in claim 1, characterised in that a cold salt pump for powering molten salt delivery is provided in the cold salt tank or on a pipeline for delivering molten salt to be heated.
3. A molten salt electric heating system as claimed in claim 1, characterised in that the electrode heater is in the form of a tank, the top of the tank being provided with an electrolyte solution outlet and the bottom of the tank being provided with an electrolyte solution inlet;
an electrolyte solution outlet of the electrode heater is communicated with an electrolyte solution inlet of the heat exchanger through a pipeline;
and an electrolyte solution inlet of the electrode heater is communicated with an electrolyte solution outlet of the heat exchanger through a pipeline.
4. A molten salt electric heating system as claimed in claim 3, characterised in that the heat exchanger has an electrolyte solution inlet at the top of the heat exchanger and an electrolyte solution outlet at the bottom of the heat exchanger.
5. A molten salt electric heating system as claimed in claim 1, characterised in that the heat exchanger is provided at an intermediate location between the electrode heater, the hot salt tank and the cold salt tank.
6. A molten salt electric heating system as claimed in claim 1, characterised in that the heat exchanger is provided with a cold molten salt inlet at the bottom and a hot molten salt outlet at the top; the cold molten salt inlet is communicated with the cold salt tank through a pipeline, and the hot molten salt outlet is communicated with the hot salt tank through a pipeline.
7. A molten salt electric heating system as claimed in claim 1, characterised in that the depth of arrangement of the electrodes within the electrode heater is adjustable.
8. A molten salt electric heating system as claimed in claim 1, characterised in that the electrolyte solution is electrolyte water or silicone oil.
9. A molten salt electric heating system as claimed in claim 1, in which the electrodes are supplied at a voltage of > 6 KV.
10. A molten salt electric heating system as claimed in claim 1 in which a circulation pump is provided on the conduit between the electrode heater and the heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122684879.4U CN216620305U (en) | 2021-11-04 | 2021-11-04 | Fused salt electric heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122684879.4U CN216620305U (en) | 2021-11-04 | 2021-11-04 | Fused salt electric heating system |
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| Publication Number | Publication Date |
|---|---|
| CN216620305U true CN216620305U (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122684879.4U Active CN216620305U (en) | 2021-11-04 | 2021-11-04 | Fused salt electric heating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116536710A (en) * | 2023-06-30 | 2023-08-04 | 中石油深圳新能源研究院有限公司 | Hot molten salt heat exchange device and gas-liquid separation device |
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2021
- 2021-11-04 CN CN202122684879.4U patent/CN216620305U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116536710A (en) * | 2023-06-30 | 2023-08-04 | 中石油深圳新能源研究院有限公司 | Hot molten salt heat exchange device and gas-liquid separation device |
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