CN212870864U - Solid heat storage system - Google Patents
Solid heat storage system Download PDFInfo
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- CN212870864U CN212870864U CN202021675020.6U CN202021675020U CN212870864U CN 212870864 U CN212870864 U CN 212870864U CN 202021675020 U CN202021675020 U CN 202021675020U CN 212870864 U CN212870864 U CN 212870864U
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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 embodiment of the utility model provides a solid heat storage system, which comprises a cavity surrounded by a heat insulation wall, wherein the cavity is filled with protective gas; the heat exchanger also comprises a heat accumulator, a heat exchanger and a high-temperature fan which are arranged in the cavity, wherein an airflow channel and a heating body are arranged in the heat accumulator, the first heat exchange side of the heat exchanger is used for connecting external heat utilization equipment, and the high-temperature fan is used for driving protective gas to circularly flow in the cavity; the protective gas flows back to the air inlet of the high-temperature fan after sequentially passing through the air outlet of the high-temperature fan, the airflow channel in the heat storage body and the second heat exchange side of the heat exchanger. The solid heat storage system utilizes the protective gas to circularly flow in the cavity of the heat storage system for heat exchange, can effectively avoid the oxidation corrosion of parts in the heat storage system, which are in contact with the gas, provides an inert protection effect for the system, and improves the working performance and the service life of the system.
Description
Technical Field
The utility model relates to a solid electric heat storage equipment technical field especially relates to a solid heat storage system.
Background
The solid heat storage is a heat storage mode which converts electric energy into heat energy by using a low-price electricity time period, stores the heat energy in a solid heat storage material and releases the heat energy through a necessary heat taking means when heat is required to be supplied. The solid electric heat storage has the advantages that: the heat storage temperature is high, the occupied space is small, the heat storage and discharge efficiency is high, the performance is stable, and the like, and the method can be widely applied to the fields of regional heating, power plant peak regulation, heat for industrial production and the like.
However, the heat accumulator of the solid heat accumulation system can be in direct contact with the circulating air, and meanwhile, due to the poor sealing performance of the circulating system, corrosive substances such as water vapor and impurities enter the cavity in the running process, so that the service life and the working performance of the heat accumulator are affected. And the heating body can also be in direct contact with the circulating air, and the long-term operation of the heating body is not facilitated. In addition, other metal parts and the like in the cavity of the thermal storage device are also subjected to oxidative corrosion to some extent by unclean circulating air. At present, the heating body can be prevented from being oxidized by coating a high-temperature-resistant and corrosion-resistant material, but the manufacturing process is complex, the cost is high, and the heat exchange between the heating body and a heat accumulator is influenced. For the anti-oxidation treatment of the heat accumulator, an additional gas inerting treatment device can be adopted, and the oxidation of the electric heating wire is slowed down by eliminating oxygen in the solid heat accumulation system. However, the addition of a gas inerting treatment device not only increases the initial investment and maintenance cost of the system, but also makes the system design more complex. Moreover, part of the heat of the circulating air is wasted in the inerting process, resulting in a reduction in the efficiency of heat energy utilization.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a solid heat storage system for main part in the solid heat storage system among the solution prior art easily receives the defect of the oxidation corrosion of the circulating air who has impurity such as steam, corrosive gas, improves the working property and the life of system.
The embodiment of the utility model provides a solid heat storage system, which comprises a cavity surrounded by a heat insulation wall, wherein the cavity is filled with protective gas; the heat exchanger comprises a heat accumulator, a heat exchanger and a high-temperature fan, wherein the heat accumulator is arranged in the cavity, an airflow channel and a heating body are arranged in the heat accumulator, the first heat exchange side of the heat exchanger is used for connecting external heat utilization equipment, and the high-temperature fan is used for driving the protective gas to circularly flow in the cavity; the protective gas flows back to the air inlet of the high-temperature fan after sequentially passing through the air outlet of the high-temperature fan, the airflow channel in the heat storage body and the second heat exchange side of the heat exchanger.
According to the utility model discloses a solid heat storage system still includes the high-pressure gas holder, the tonifying qi mouth has been seted up on the heat preservation wall, the exit linkage of high-pressure gas holder in the tonifying qi mouth, with to the benefit is in the cavity the protection gas.
According to the utility model discloses a solid heat accumulation system, the export of high pressure gas holder pass through the gulp valve connect in the gulp mouth, the cavity still is equipped with the pressure gauge, the pressure gauge electricity connect in the gulp valve.
According to the utility model discloses a solid heat accumulation system, the heating member is followed airflow channel's length direction locates in the airflow channel.
According to the utility model discloses a solid heat storage system, be located in the cavity the air outlet of high temperature fan with it is internal to store heat still laid the water conservancy diversion baffle between the airflow channel, the water conservancy diversion baffle with airflow channel is corresponding.
According to the utility model discloses a solid heat accumulation system is located upper portion, middle part and the lower part of heat accumulator temperature measuring device is installed respectively to airflow channel's import and export.
According to the utility model discloses a solid heat accumulation system, the bottom of heat accumulator is fixed in through braced frame in the cavity, braced frame's bottom is equipped with the heat insulation layer.
According to the utility model discloses a solid heat storage system, the inboard of heat preservation wall still is equipped with the insulating layer.
According to the utility model discloses a solid heat accumulation system, the first heat transfer side of heat exchanger is passed through supply channel and return water piping connection in the outside with the thermal equipment.
According to the utility model discloses a solid heat storage system, the cover gas includes one or more in nitrogen gas, argon gas, helium and carbon dioxide.
The embodiment of the utility model provides a solid heat storage system utilizes the protective gas to circulate in the cavity of heat storage system and flow the heat transfer, when the system stores heat, utilizes the millet electricity to carry out the circular telegram heating to the heating member, converts millet electricity energy into the heat energy of heating member, carries out the heat transfer through heat accumulator and heating member and gets off this heat energy storage, is used for the heat supply of daytime; when the system supplies heat, the heat is exchanged by using the circulating protective gas and the heat accumulator, the stored heat is taken out, and the protective gas with higher temperature transmits the heat to external heat utilization equipment through the heat exchanger, so that the heat utilization requirement is met. Because the protective gas does not contain corrosive gases such as oxygen, water vapor and the like, the oxidation corrosion of parts in the heat storage system, which are in contact with the gas, can be effectively avoided, the inert protection effect is provided for the system, the use limit of other parts and materials is reduced, the selectable range of other parts and materials is enlarged, the working performance and the service life of the system are improved, the addition of cleaning treatment procedures such as dehumidification and oxygen removal of air and the like can be avoided, and the initial investment and operation and maintenance cost of the system are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a solid heat storage system according to an embodiment of the present invention.
Reference numerals:
1. a heat preservation wall; 2. A heat accumulator; 3. A heat exchanger;
4. a high temperature fan; 5. An air flow channel; 6. A heating body;
7. a high pressure gas storage tank; 8. An air supplement port; 9. A flow guide baffle plate;
10. a temperature measuring device; 11. A support frame; 12. A thermal insulation layer;
13. a water supply line; 14. A water return pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for clearly indicating the numbering of the product parts and do not represent any substantial difference unless explicitly stated or limited otherwise. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may also be changed accordingly. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.
It is to be understood that, unless otherwise expressly specified or limited, the term "coupled" is used broadly, and may, for example, refer to directly coupled devices or indirectly coupled devices through intervening media. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
As shown in fig. 1, the solid heat storage system provided by the embodiment of the present invention includes a cavity surrounded by a thermal insulation wall 1, and a shielding gas is filled in the cavity; the heat exchanger also comprises a heat accumulator 2, a heat exchanger 3 and a high-temperature fan 4 which are arranged in the cavity, wherein an airflow channel 5 and a heating body 6 are arranged in the heat accumulator 2, the first heat exchange side of the heat exchanger 3 is used for connecting external heat utilization equipment, and the high-temperature fan 4 is used for driving protective gas to circularly flow in the cavity; the protective gas flows back to the air inlet of the high-temperature fan 4 after sequentially passing through the air outlet of the high-temperature fan 4, the airflow channel 5 in the heat accumulator 2 and the second heat exchange side of the heat exchanger 3.
Specifically, the shielding gas mainly prevents substances to be protected in the solid heat storage system, such as the heat exchanger 3, the heating body 6 and the like, from being oxidized by oxygen and water vapor in the air. The shielding gas must be a gas that is chemically stable and does not react with the shielding material, and is generally a chemically inert gas, which may be a mixture of one or more of nitrogen, argon, helium, and carbon dioxide. In this embodiment, the description is mainly given by using a shielding gas as nitrogen.
The heat accumulator 2 can be formed by stacking a plurality of heat accumulation magnesia bricks, and the heat accumulation magnesia bricks can resist high temperature and have strong heat accumulation capacity. Still install a plurality of heating members 6 in the heat accumulator 2, heating member 6 can be the metal rod, and heating member 6 can utilize millet electricity heating, and its temperature rise is rapid, and high temperature resistant, and stable in structure still can play certain support guard action to heat accumulator 2. Airflow channel 5 that link up about both ends is still seted up in the heat accumulator 2, and heat accumulator 2 can install the position that is close to the top in the cavity, is favorable to the circulation of the higher protective gas of temperature, and high temperature fan 4 and heat exchanger 3 then can install the position that is close to the bottom in the cavity, are favorable to the backward flow of the lower protective gas of temperature after the heat transfer.
The right end of the airflow channel 5 is opposite to the air outlet of the high-temperature fan 4, the high-temperature fan 4 is used for driving the protective airflow in the cavity to flow into the airflow channel 5, and the protective airflow exchanges heat with the heat accumulator 2 for storing heat, so that the temperature is increased; the left end of the airflow channel 5 is opposite to the second heat exchange side of the heat exchanger 3, and the protective gas flowing out of the airflow channel 5 passes through the second heat exchange side of the heat exchanger 3, so that the heat of the protective gas can be transferred to the heat exchange medium in the first heat exchange side of the heat exchanger 3, and the heat output is realized. The heat exchanger 3 can be of a hot water-air, air-air, steam-air, heat transfer oil-air type or the like. The protective gas after heat exchange flows back to the air inlet of the high-temperature fan 4 again to form an airflow cycle, and the circulating air speed and air quantity can be adjusted according to the specific heat exchange load requirement.
When the system stores heat, the heater 6 is electrified and heated by valley electricity, valley electricity energy is converted into heat energy of the heater 6, and the heat energy is stored by heat exchange between the heat accumulator 2 and the heater 6 and is used for heating in the daytime; when the system supplies heat, the heat is exchanged with the heat accumulator 2 by using the circulating protective gas, the stored heat is taken out, and the protective gas with higher temperature transmits the heat to external heat utilization equipment through the heat exchanger 3, so that the heat utilization requirement is met.
The solid heat storage system provided by the embodiment utilizes the protective gas to circularly flow in the cavity of the heat storage system for heat exchange, and because the protective gas does not contain corrosive gases such as oxygen, water vapor and the like, the oxidative corrosion of components in the heat storage system, which are in contact with the gas, can be effectively avoided, the inert protection effect is provided for the system, the use limit of other component materials is reduced, the selectable range of other component materials is enlarged, the working performance and the service life of the system are improved, the addition of clean processing procedures such as dehumidification and oxygen removal of air can also be avoided, and the initial investment and the operation and maintenance cost of the system are reduced.
Further, as shown in fig. 1, the solid heat storage system provided in this embodiment further includes a high-pressure gas storage tank 7, an air supply port 8 is opened on the thermal insulation wall 1, and an outlet of the high-pressure gas storage tank 7 is connected to the air supply port 8 to supply the protective gas into the cavity. After long-term operation, the circulating air volume of the protective gas may be insufficient due to accumulated leakage, and the protective gas can be supplemented into the cavity by the high-pressure gas storage tank 7 through the gas supplementing port 8. The pressure of the protective gas in the cavity is preferably a positive pressure working condition, i.e. greater than the external atmospheric pressure, so as to prevent outdoor air from leaking into the cavity.
Further, the outlet of the high pressure air tank 7 is connected to the air supply port 8 through an air supply valve (not shown), which may be an electric valve. The chamber is further provided with a pressure gauge (not shown in the figure) electrically connected to the aeration valve. The circulating air quantity required by the protective gas is controlled by monitoring the real-time pressure of the protective gas in the cavity, and when the pressure of the protective gas is lower than a set value range, the protective gas is supplemented. In addition, the heat preservation wall 1 can be provided with an exhaust hole, the exhaust hole is connected to the external atmosphere through an exhaust valve, and when the pressure of the protective gas is too high or the cavity needs to be decompressed, the protective gas is properly evacuated. The exhaust valve can also adopt an electric valve, and the exhaust valve can also be electrically connected with a pressure gauge.
Further, as shown in fig. 1, a heating body 6 is provided in the air flow passage 5 along the length direction of the air flow passage 5. The heating channel of the heating body 6 is combined with the airflow channel 5 of the circulating protective gas, so that the heat convection area of the circulating protective gas is increased, the overheating or nonuniform heating of the heating body 6 is avoided, and the heat exchange efficiency is improved.
Further, as shown in fig. 1, a flow guide baffle 9 is further disposed between the air outlet of the high temperature fan 4 and the air flow channel 5 in the heat accumulator 2, and the flow guide baffle 9 corresponds to the air flow channel 5. Specifically, the diversion baffle 9 may be horizontally disposed, and a plurality of diversion baffles 9 may be installed on the inner wall of the thermal insulation wall 1 at uniform intervals in the vertical direction. The flow guide baffle plates 9 are uniformly distributed above the air outlet of the high-temperature fan 4, so that the protective gas flow can be uniformly introduced into each airflow channel 5, the phenomena of excessive upper airflow and insufficient lower airflow are avoided, and the lower part of the heat accumulator 2 is prevented from being overheated due to insufficient heat exchange.
Further, as shown in fig. 1, temperature measuring devices 10 are installed at the inlet and the outlet of the gas flow path 5 located at the upper, middle and lower portions of the heat accumulator 2, respectively. The temperature measuring device 10 may employ a thermocouple thermometer or the like for measuring the temperature distribution in the thermal storage body during heating and cooling, and whether the air flow organization is reasonable or not is determined by the temperature thereof.
Further, as shown in fig. 1, the bottom of the heat accumulator 2 is fixed in the cavity through a support frame 11, and the support frame 11 may be made of metal and arranged in an array to provide stable support for the heat accumulator 2. The bottom of the supporting frame 11 is provided with a heat insulating layer to reduce the heat leakage of the ground.
Further, as shown in fig. 1, an insulation layer 12 is further disposed on the inner side of the thermal insulation wall 1. Specifically, the thermal insulation wall 1 and the thermal insulation layer 12 can be a combination of multiple composite high-temperature-zone thermal insulation materials, and the thickness of the thermal insulation wall should meet the structural load weighing design requirement.
Further, in this embodiment, the heat exchanger 3 is a hot water-air heat exchanger, that is, a gas-water heat exchanger, the first heat exchange side of the heat exchanger 3 is connected to an external heat utilization device through a water supply pipeline 13 and a water return pipeline 14, and the water supply pipeline 13 and the water return pipeline 14 may be directly used for domestic hot water supply on the user side or used for heat supply and water return of a municipal heat supply network.
As can be seen from the above embodiments, the solid heat storage system provided by the utility model utilizes the protective gas to circularly flow and exchange heat in the cavity of the heat storage system, and when the system stores heat, the valley electricity is utilized to heat the heating body 6, so as to convert the valley electricity into the heat energy of the heating body 6, and the heat accumulator 2 exchanges heat with the heating body 6 to store the heat energy for the heat supply in the daytime; when the system supplies heat, the heat is exchanged with the heat accumulator 2 by using the circulating protective gas, the stored heat is taken out, and the protective gas with higher temperature transmits the heat to external heat utilization equipment through the heat exchanger 3, so that the heat utilization requirement is met. Because the protective gas does not contain corrosive gases such as oxygen, water vapor and the like, the oxidation corrosion of parts in the heat storage system, which are in contact with the gas, can be effectively avoided, the inert protection effect is provided for the system, the use limit of other parts and materials is reduced, the selectable range of other parts and materials is enlarged, the working performance and the service life of the system are improved, the addition of cleaning treatment procedures such as dehumidification and oxygen removal of air and the like can be avoided, and the initial investment and operation and maintenance cost of the system are reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A solid heat storage system is characterized by comprising a cavity enclosed by a heat insulation wall, wherein a protective gas is filled in the cavity; the heat exchanger comprises a heat accumulator, a heat exchanger and a high-temperature fan, wherein the heat accumulator is arranged in the cavity, an airflow channel and a heating body are arranged in the heat accumulator, the first heat exchange side of the heat exchanger is used for connecting external heat utilization equipment, and the high-temperature fan is used for driving the protective gas to circularly flow in the cavity; the protective gas flows back to the air inlet of the high-temperature fan after sequentially passing through the air outlet of the high-temperature fan, the airflow channel in the heat storage body and the second heat exchange side of the heat exchanger.
2. The solid heat storage system according to claim 1, further comprising a high-pressure gas tank, wherein a gas supplementing opening is formed in the heat-insulating wall, and an outlet of the high-pressure gas tank is connected to the gas supplementing opening so as to supplement the protective gas into the cavity.
3. The solid heat storage system according to claim 2, wherein an outlet of the high-pressure gas tank is connected to the gas replenishing port through a gas replenishing valve, and the chamber is further provided with a pressure gauge electrically connected to the gas replenishing valve.
4. The solid heat storage system according to claim 1, wherein the heating body is provided in the air flow passage in a length direction of the air flow passage.
5. The solid heat storage system according to claim 4, wherein a flow guide baffle is further arranged in the cavity between the air outlet of the high temperature fan and the air flow channel in the heat storage body, and the flow guide baffle corresponds to the air flow channel.
6. The solid heat storage system according to claim 5, wherein temperature measuring devices are installed at the inlet and the outlet of the gas flow passage in the upper, middle and lower portions of the heat storage body, respectively.
7. The solid thermal storage system of any one of claims 1 to 6, wherein the bottom of the thermal storage body is secured within the cavity by a support frame, the bottom of the support frame being provided with a layer of thermal insulation.
8. A solid thermal storage system according to any one of claims 1 to 6 wherein the thermal walls are further provided with an insulating layer on the inside.
9. The solid heat storage system according to any one of claims 1 to 6, wherein the first heat exchange side of the heat exchanger is connected to the external heat using device through a water supply line and a water return line.
10. The solid thermal storage system according to any one of claims 1 to 6, wherein the shielding gas comprises nitrogen, argon, helium or carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021675020.6U CN212870864U (en) | 2020-08-12 | 2020-08-12 | Solid heat storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021675020.6U CN212870864U (en) | 2020-08-12 | 2020-08-12 | Solid heat storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212870864U true CN212870864U (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021675020.6U Active CN212870864U (en) | 2020-08-12 | 2020-08-12 | Solid heat storage system |
Country Status (1)
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| CN (1) | CN212870864U (en) |
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2020
- 2020-08-12 CN CN202021675020.6U patent/CN212870864U/en active Active
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