High-temperature heat storage and exchange device

Abstract

The utility model relates to a high-temperature heat storage and exchange device which comprises a heat storage container, a heat exchange device and a heat exchange device. The storage tank is used for storing heat-conducting fluid and is provided with a second fluid port for the heat-conducting fluid to circulate, and the second fluid port is in fluid communication with the first fluid port; the first fluid pump is used for at least driving the heat conduction fluid to enter the storage tank from the heat storage container through the first fluid opening and the second fluid opening, so that the liquid level of the heat conduction fluid in the heat storage container is changed; and a fluid channel for enabling the heat-conducting fluid in the storage box to flow back to the heat storage container is also arranged between the storage box and the heat storage container. Compared with the prior art, the liquid level of the heat-conducting fluid in the heat storage container is changed by arranging the storage tank and the first fluid pump, so that the flowability of the heat-conducting fluid in the heat storage container can be enhanced, and the heat exchange performance and the temperature field uniformity of the heat-conducting fluid are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of heat conducting fluid heat storage and exchange, especially to a high-temperature heat storage and exchange device. BACKGROUND

[0002] The double-tank system is a traditional high-temperature molten salt heat storage system and is currently the main technology adopted. However, the double-tank system currently has the following problems: (1) complex structure and operation: including complex system connection and auxiliary facilities, etc., resulting in complicated installation and operation; (2) high cost and short service life of molten salt pump: a long-rod molten salt pump must be used, and the service life is only 1.5 years; (3) complicated operation and maintenance, and low reliability: the molten salt cannot solidify in the tank during the use period, and many safeguards must be provided.

[0003] Therefore, a Chinese invention patent with the patent number ZL202210608538.5 (the authorized announcement number CN114838611B) discloses a high-temperature heat exchange and storage unit, structure and device, and specifically discloses the following content: the high-temperature heat exchange and storage unit in the high-temperature heat exchange and storage structure is at least two and stacked in layers, wherein the fluid outlet of the shell of any one high-temperature heat exchange and storage unit is in fluid communication with the fluid inlet of the shell of another high-temperature heat exchange and storage unit located below the high-temperature heat exchange and storage unit, and the heat exchange pipes in the shells of the high-temperature heat exchange and storage units are sequentially connected in communication. The high-temperature heat exchange and storage unit includes a shell filled with solid heat storage particles and capable of isolating the solid heat storage particles inside, the upper end of the shell has a fluid inlet for the inflow of high-temperature heat conducting fluid, the bottom wall is provided with a fluid outlet for the outflow of heat exchanged heat conducting fluid, and the shell is respectively provided with an overflow port, an overflow pipe for the flow of heat conducting fluid, and a heat exchange pipe for the passage of fluid to be heated, wherein the overflow pipe connects the overflow port and the fluid outlet of the shell, and the highest point of the overflow pipe is lower than the top end of the shell.

[0004] The modular system of the above patent simplifies the overall structure of the double-tank system, improves the overall safety and reliability. At the same time, it overcomes the problem of the double-tank system that needs to be produced, installed and operated on site, shortens the construction period, and effectively improves the quality and reliability of the device. Moreover, the solid heat storage particles and molten salt are used for heat storage, which greatly reduces the amount of molten salt used (the amount of molten salt used is only 1 / 3 of that of the double-tank system), which is conducive to reducing costs. In addition, the unit is independently operated, and in a project with dozens of units combined, the accident range is limited to one unit, and the influence is limited (the double-tank system often leads to the shutdown of the entire system). In actual engineering, the investment of the modular system with the same capacity is only 50-60% of that of the double-tank system, and the cost advantage is very obvious. The occupied area is only about 50% of that of the double-tank system, and the land selection advantage is significant. Moreover, the project operation cost is also very low.

[0005] However, the modular system of the above patent still has the following problems: the molten salt in the module can only flow in one direction by overflow under the driving of gravity, the flow rate of the molten salt is limited, and the average flow rate is only 1-2 mm / s, which is not conducive to heat exchange. In addition, the temperature field in the module is uneven, and the solid heat storage particles in some areas cannot fully play the heat storage capacity. Utility model content

[0006] The first technical problem to be solved by the utility model is to provide a high-temperature heat storage and exchange device with good heat exchange performance.

[0007] The second technical problem to be solved by the utility model is to provide a high-temperature heat storage and exchange device with good heat exchange performance and good temperature field uniformity

[0008] The technical scheme adopted by the utility model to solve at least one of the above technical problems is: a high-temperature heat storage and exchange device, characterized by comprising:

[0009] The heat storage container has a first fluid port for the flow of the heat-conducting fluid.

[0010] The tank is used for storing the heat-conducting fluid and has a second fluid port for the flow of the heat-conducting fluid, which is in fluid communication with the first fluid port.

[0011] The first fluid pump is used to drive the heat-conducting fluid from the heat storage container into the tank through the first fluid port and the second fluid port, thereby causing the liquid level of the heat-conducting fluid in the heat storage container to change.

[0012] The tank and the heat storage container also have a fluid channel for the heat-conducting fluid in the tank to flow back to the heat storage container.

[0013] Further, it further comprises a transfer tank, the heat-conducting fluid in the heat storage container flows into the tank through the transfer tank, and at the same time, the heat-conducting fluid in the tank flows into the heat storage container through the transfer tank, and the first fluid pump is arranged in the transfer tank. Through the transfer tank, on the one hand, the heat-conducting fluid can better flow back and forth between the heat storage container and the tank, and on the other hand, the change rate of the capacity of the heat-conducting fluid in the heat storage container can be increased, thereby further increasing the flowability of the heat-conducting fluid in the heat storage container, and then further improving the heat exchange performance of the heat-conducting fluid.

[0014] Further, the transfer tank is a first pump tank of the first fluid pump, and the first pump tank has a third fluid port and a fourth fluid port, respectively, wherein the third fluid port is in fluid communication with the first fluid port, and the fourth fluid port is in fluid communication with the second fluid port,

[0015] And the first fluid pump has at least two states:

[0016] In the first state, the first fluid pump drives the heat-conducting fluid from the storage tank into the heat storage container through the first pump tank;

[0017] In the second state, the first fluid pump drives the heat-conducting fluid from the heat storage container into the storage tank through the first pump tank. Thus, the first pump tank in the present application plays multiple functions, and no additional transfer tank is needed, so that the internal structure of the high-temperature heat storage and heat exchange device is simple.

[0018] Further, the storage amount of the heat-conducting fluid in the storage tank is repeatedly changed between filling and emptying. On the one hand, it can maximize the change rate of the capacity of the heat-conducting fluid in the heat storage container, and on the other hand, it can avoid the freezing of the heat-conducting fluid in the storage tank, which is beneficial to ensure the normal operation of the device.

[0019] Further, the transfer tank is the first pump tank of the first fluid pump, and the first pump tank has a third fluid port and a fourth fluid port, wherein the third fluid port is in fluid communication with the first fluid port, and the fourth fluid port is in fluid communication with the second fluid port; the storage tank is arranged at a position higher than the highest liquid level of the heat storage container; the first fluid pump is used to drive the heat-conducting fluid from the heat storage container into the storage tank, and when the first fluid pump stops running, the heat-conducting fluid will flow back to the heat storage container under the action of gravity. Thus, it is convenient to realize the control of the device, and it is beneficial to ensure the reliability of the operation of the device.

[0020] Further, it further comprises a second fluid pump for conveying the heat-conducting fluid and an electric heater for heating the heat-conducting fluid, wherein the second pump tank of the second fluid pump has a fifth fluid port and a sixth fluid port, the electric heater has a fluid inlet and a fluid outlet, and the heat storage container further has a seventh fluid port,

[0021] And, the fifth fluid port is in fluid communication with the first fluid port, the sixth fluid port is in fluid communication with the fluid inlet, and the fluid outlet is in fluid communication with the seventh fluid port, so that the second fluid pump can take out the heat-conducting fluid from the bottom of the heat storage container, heat it through the electric heater, and then flow into the heat storage container. In the electric heat storage mode, the electric heater heats the heat-conducting fluid to become high-temperature heat-conducting fluid, which then enters the heat storage container. The high-temperature heat-conducting fluid heats the solid heat storage particles in the process of downward circulation, increases the temperature of the solid heat storage particles, and completes the heat storage process. Further, the heat exchanger for heat exchange between the heat-conducting fluid and the solid heat storage particles is also included. The heat exchanger includes heat exchange pipes arranged in the heat storage container along the length direction of the heat storage container. In the working state, the water flowing into one end of the heat exchange pipe is heated to steam in the heat exchange pipe and then flows out from the other end, or the steam flowing into one end of the heat exchange pipe is condensed in the heat exchange pipe and then flows out from the other end. By arranging the heat exchanger, on the one hand, the heat-conducting fluid in the heat storage container in the working state can be prevented from freezing, thereby eliminating the complex structure and complex operation in the prior art, improving the working reliability, and realizing the integration of heat storage and heat exchange. After a long time of shutdown, only steam needs to be supplied to the heat exchange pipe to make the whole device resume operation in a short time. In addition, the first fluid pump in the utility model can adopt a short rod fluid pump (2 meters or less), which can reduce the cost and prolong the service life of the fluid pump compared with the existing long rod fluid pump (more than 10 meters), thereby being beneficial to prolonging the overall service life of the device.

[0022] Further, the heat storage container is tubular and vertically extends, the top end of the heat storage container is closed, the first fluid port is arranged at the bottom of the heat storage container, the heat storage container is filled with solid heat storage particles having a density greater than the heat-conducting fluid and capable of heat exchange with the heat-conducting fluid, and the solid heat storage particles can be isolated in the heat storage container. In the utility model, the heat storage container is tubular and vertically extends, so that the inner cavity of the heat storage container is an up-down through structure. Compared with the prior art, the actual average volume of the heat storage container is increased, the unit volume of the occupied area is reduced, and the solid heat storage particles can be filled after the installation of the device main body is completed, so that the engineering quantity of installation can be greatly reduced and the installation period can be shortened. Further, the structure of the heat storage container being up-down through can make the solid heat storage particles and the heat-conducting fluid have a tendency of being layered up and down in the heat storage container, and the temperature field has a tendency of being high up and low down. In combination with the first fluid pump and the storage tank, the heat-conducting fluid can flow up and down in the heat storage container, the flowability of the heat-conducting fluid is better improved, and the heat exchange efficiency of the heat-conducting fluid is further improved.

[0023] Further, the heat storage container is tubular and vertically extends, the top end of the heat storage container is closed, the first fluid port is arranged at the bottom of the heat storage container, the heat storage container is filled with solid heat storage particles having a density greater than the heat-conducting fluid and capable of heat exchange with the heat-conducting fluid, and the solid heat storage particles can be isolated in the heat storage container. In the utility model, the heat storage container is tubular and vertically extends, so that the inner cavity of the heat storage container is an up-down through structure. Compared with the prior art, the actual average volume of the heat storage container is increased, the unit volume of the occupied area is reduced, and the solid heat storage particles can be filled after the installation of the device main body is completed, so that the engineering quantity of installation can be greatly reduced and the installation period can be shortened. Further, the structure of the heat storage container being up-down through can make the solid heat storage particles and the heat-conducting fluid have a tendency of being layered up and down in the heat storage container, and the temperature field has a tendency of being high up and low down. In combination with the first fluid pump and the storage tank, the heat-conducting fluid can flow up and down in the heat storage container, the flowability of the heat-conducting fluid is better improved, and the heat exchange efficiency of the heat-conducting fluid is further improved.

[0024] Further, the heat storage containers are at least two arranged side by side, and the opposite side walls of the adjacent heat storage containers are respectively provided with a communication port and are communicated through a communication pipe.

[0025] Further, the heat storage containers are at least two arranged side by side, and the opposite side walls of the adjacent heat storage containers are respectively provided with a communication port and are communicated through a communication pipe.

[0026] Compared with the prior art, the high-temperature heat storage and heat exchange device has the advantages that: the first fluid pump is arranged to drive the heat-conducting fluid to flow from the heat storage container into the storage tank through the first fluid port and the second fluid port, so as to cause the liquid level of the heat-conducting fluid in the heat storage container to change, thereby enhancing the flowability of the heat-conducting fluid in the heat storage container, improving the heat exchange performance of the heat-conducting fluid, and improving the uniformity of the temperature field. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a structural schematic view of a high-temperature heat storage and heat exchange device according to an embodiment of the present application.

[0028] Figure 2 FIG. 2 is a structural schematic view of a high-temperature heat storage and heat exchange device according to another embodiment of the present application.

[0029] Figure 3 FIG. 3 is a structural schematic view of a heat exchange pipe according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the utility model can be arranged in different directions, so these directional terms are only as an illustration and should not be regarded as a limitation, for example, "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features limited by "first", "second" can be explicitly or implicitly include one or more features.

[0032] Embodiment 1:

[0033] As shown in Figure 1 and Figure 3 , a high-temperature heat storage and heat exchange device includes a heat storage container 1, a storage tank 2 and a first fluid pump 3. Wherein, the heat storage container 1 has a first fluid port 11 for the flow of heat-conducting fluid. The storage tank 2 is used for storing heat-conducting fluid and has a second fluid port 21 for the flow of heat-conducting fluid, which is in fluid communication with the above-mentioned first fluid port 11. The first fluid pump 3 is used to drive at least the heat-conducting fluid from the above-mentioned heat storage container 1 into the above-mentioned storage tank 2 through the above-mentioned first fluid port 11 and the above-mentioned second fluid port 21, thereby causing the liquid level of the heat-conducting fluid in the heat storage container 1 to change. And, the storage tank 2 and the heat storage container 1 also have a fluid passage for the heat-conducting fluid in the storage tank 2 to flow back to the heat storage container 1. In this embodiment, the fluid passage specifically includes the following first pump tank, the communication pipeline between the first pump tank and the storage tank 2 and the communication pipeline between the first pump tank and the heat storage container, as shown in Figure 1 .

[0034] As can be seen from the above, in the utility model, the storage tank 2 and the first fluid pump 3 are arranged, wherein the first fluid pump 3 is used to drive at least the heat-conducting fluid from the above-mentioned heat storage container 1 into the above-mentioned storage tank 2 through the above-mentioned first fluid port 11 and the above-mentioned second fluid port 21, thereby causing the liquid level of the heat-conducting fluid in the heat storage container 1 to change, and further enhancing the flowability of the heat-conducting fluid in the heat storage container 1, improving the heat exchange performance of the heat-conducting fluid and the uniformity of the temperature field.

[0035] Further, the heat transfer fluid in the heat storage container 1 flows into the storage tank 2 through a transfer tank 31, and the heat transfer fluid in the storage tank 2 flows into the heat storage container 1 through the transfer tank 31, and the first fluid pump 3 is arranged in the transfer tank 31. The transfer tank 31 can make the heat transfer fluid flow back and forth between the heat storage container 1 and the storage tank 2, and can increase the change rate of the capacity of the heat transfer fluid in the heat storage container 1, thereby further increasing the flowability of the heat transfer fluid in the heat storage container 1, and further improving the heat exchange performance of the heat transfer fluid.

[0036] In the embodiment, the transfer tank 31 is preferably a first pump tank of the first fluid pump 3, and the first pump tank has a third fluid port 311 and a fourth fluid port 312, wherein the third fluid port 311 is in fluid communication with the first fluid port 11, and the fourth fluid port 312 is in fluid communication with the second fluid port 21. The first fluid pump 3 has at least two states:

[0037] In the first state, the first fluid pump 3 drives the heat transfer fluid to flow from the storage tank 2 into the heat storage container 1 through the transfer tank 31.

[0038] In the second state, the first fluid pump 3 drives the heat transfer fluid to flow from the heat storage container 1 into the storage tank 2 through the transfer tank 31. The first pump tank in the utility model has multiple functions, and does not need to be provided with a transfer tank 31, so that the internal structure of the high-temperature heat storage and heat exchange device is simple.

[0039] Further preferably, the storage amount of the heat transfer fluid in the storage tank 2 repeatedly changes between full and empty. On the one hand, the change rate of the capacity of the heat transfer fluid in the heat storage container 1 can be maximized, and on the other hand, the heat transfer fluid can be prevented from freezing in the storage tank 2, which is beneficial to ensure the reliability of the device.

[0040] Further, the first fluid pump 3 is used to drive the heat transfer fluid to flow from the heat storage container 1 into the storage tank 2, and when the first fluid pump 3 stops running, the heat transfer fluid will flow back to the heat storage container 1 under the action of gravity. Therefore, the device can be easily controlled, which is beneficial to ensure the reliability of the device.

[0041] The heat storage container 1 can have various specific implementation manners. In the embodiment, the heat storage container 1 is preferably tubular and vertically extends, and the top end of the heat storage container 1 is closed, the first fluid port 11 is arranged at the bottom of the heat storage container 1, the heat storage container 1 is filled with solid heat storage particles 13 having a density greater than that of the heat transfer fluid and capable of exchanging heat with the heat transfer fluid, and the solid heat storage particles 13 can be isolated in the heat storage container 1.

[0042] Further, the heat exchanger for exchanging heat with the heat conducting fluid and the solid heat storage particles 13 respectively is provided, which comprises the heat exchange pipe 6 arranged in the heat storage container 1 along the length direction of the heat storage container 1, and in the working state, the water flowing into the lower end of the heat exchange pipe 6 is heated into steam in the heat exchange pipe 6 and then flows out from the upper end, or the steam flowing into the upper end of the heat exchange pipe 6 is condensed in the heat exchange pipe 6 and then flows out from the lower end. In the embodiment, the heat exchanger further comprises the first fluid pipe 61 and the second fluid pipe 62 arranged outside the heat storage container 1, wherein the first fluid pipe 61 is connected with one end of the heat exchange pipe 6, and the second fluid pipe 62 is connected with the other end of the heat exchange pipe 6.

[0043] In the embodiment, the lower end of the heat storage container 1 is horizontally separated by the filter screen 9 through which the heat conducting fluid can permeate, the filter screen 9 is located above the first fluid port 11, and the aperture of the filter screen 9 is smaller than the particle size of the solid heat storage particles 13, so that the solid heat storage particles 13 can be isolated in the heat storage container 1 and cannot escape from the heat storage container 1.

[0044] As can be seen, the heat storage container 1 is tubular and vertically extends, so that the inner cavity of the heat storage container 1 is a through structure from top to bottom, compared with the prior art, the actual average volume of the heat storage container 1 is increased, the unit volume of the floor area is reduced, and the solid heat storage particles 13 can be filled after the installation of the device main body is completed, so that the engineering quantity of the installation can be greatly reduced and the installation period can be shortened. In the utility model, the height of the heat storage container 1 can reach 15 meters. Further, the structure of the heat storage container 1 being through from top to bottom can make the solid heat storage particles 13 and the heat conducting fluid have a tendency of being layered from top to bottom in the heat storage container 1, and the temperature field has a tendency of being high from top to low, which is beneficial to realize the flow of the heat conducting fluid from top to bottom in the heat storage container 1, better improve the flowability of the heat conducting fluid, and further improve the heat exchange efficiency of the heat conducting fluid.

[0045] Further, by providing the heat exchanger, on the one hand, the solidification of the heat conducting fluid in the heat storage container 1 in the working state can be avoided, so that the complex structure and the complex operation in the prior art are avoided, the working reliability is improved, the integration of heat storage and heat exchange can be realized, and after a long time of shutdown, the whole device can be restored to operation in a short time by only inputting steam into the heat exchange pipe 6. In addition, the first fluid pump 3 in the embodiment can adopt a short rod fluid pump (2 meters or less), compared with the existing long rod fluid pump (10 meters or more), the cost can be reduced, the service life of the first fluid pump 3 can be prolonged, and then the overall service life of the device can be prolonged.

[0046] The heat-conducting fluid is at least one of molten salt or heat-conducting oil. The molten salt and the heat-conducting oil can fill the gaps between the solid heat storage particles 13, greatly reduce the thermal resistance, significantly increase the heat exchange area, realize high-efficiency heat exchange, and greatly reduce the heat exchange temperature terminal difference. In the embodiment, the heat-conducting fluid is preferably liquid molten salt. The solid heat storage particles 13 are at least one of forsterite or quartzite, so that good heat exchange and heat storage effects can be obtained. Moreover, the molten salt and the solid heat storage particles 13 are combined, which greatly reduces the cost (the equivalent cost of the solid heat storage particles 13 is only 1 / 8 of that of the molten salt) compared with the traditional pure molten salt mode. The molten salt mainly serves as a heat exchange medium, and the solid heat storage particles 13 mainly serve as a heat storage medium.

[0047] Further, a flow guide (not shown) for changing the flow direction of the heat-conducting fluid inside the heat storage container 1 is further included. The flow guide can strengthen the flow diffusion of the heat-conducting fluid, thereby improving the heat exchange capacity. Preferably, the flow guide includes flow guide fins arranged in the solid heat storage particles 13 in the heat storage container 1 in the horizontal direction, so as to guide the radial flow of the heat-conducting fluid in the solid heat storage particles 13, thereby improving the radial temperature difference caused by the uneven vertical flow of the heat-conducting fluid, optimizing the cross-sectional temperature field, and further improving the heat storage effect. Further preferably, the flow guide is arranged in the up-down direction along the straight line along which the central axis of the heat exchange pipe 6 is located, and each flow guide includes at least two flow guide fins arranged in the circumferential direction.

[0048] Further, the heat storage container 1 is at least two containers arranged side by side, and the opposite side walls of adjacent heat storage containers 1 are respectively provided with communication openings 14 and are connected in communication through horizontally extending communication pipes 15. Thus, the heat-conducting fluid can flow and exchange heat between the heat storage containers 1, which, in combination with the up-down flow and heat exchange in each heat storage container 1, is conducive to improving the heat exchange effect of the heat-conducting fluid and facilitating uniform distribution of the temperature field in each heat storage container 1. Meanwhile, the heat exchange pipes 6 correspond one by one to the heat storage containers 1, and one end of each heat exchange pipe 6 is connected to the first fluid pipe 61, and the other end is connected to the second fluid pipe 61.

[0049] Preferably, the inside of each heat storage container 1 is divided into a fluid layer 1a containing only the heat-conducting fluid and a mixed layer 1b located below the fluid layer 1a, and the mixed layer 1b contains both the solid heat storage particles 13 and the heat-conducting fluid. Each communication opening 14 is arranged at the side wall of the fluid layer 1a of the heat storage container 1. In this way, no filter structure needs to be arranged at each communication opening 14, avoiding the complication of the internal structure of each heat storage container 1.

[0050] Furthermore, in this embodiment, the first fluid inlet 11 is respectively disposed at the bottom of each heat storage container 1, and a first delivery pipe 7 is also included. The first delivery pipe 7 is disposed horizontally below each heat storage container 1. The pipe wall of the first delivery pipe 7 is provided with a first guide port 71 corresponding to the heat storage container 1. Each first guide port 71 is in fluid communication with the fluid outlet 52 of the corresponding heat storage container 1. One end of the first delivery pipe 7 is closed, while the other end is in fluid communication with the input end of the first pump tank.

[0051] Example 2:

[0052] like Figure 2 As shown, unlike Embodiment 1, this embodiment further includes a second fluid pump 4 for conveying the heat-conducting fluid and an electric heater 5 for heating the heat-conducting fluid. The second pump tank 41 of the second fluid pump 4 has a fifth fluid port 411 and a sixth fluid port 412, the electric heater 5 has a fluid inlet 51 and a fluid outlet 52, and each heat storage container 1 also has a seventh fluid port 12. Furthermore, the fifth fluid port 411 is fluidly connected to the first fluid port 11, the sixth fluid port 412 is fluidly connected to the fluid inlet 51, and the fluid outlet 52 is fluidly connected to each of the seventh fluid ports 12. Thus, the second fluid pump 4 can draw the heat-conducting fluid from the bottom of the heat storage container 1, heat it through the electric heater 5, and then allow it to flow back into the heat storage container 1. The heat-conducting fluid is heated by the electric heater 5 during the electric heat storage process, turning it into a high-temperature heat-conducting fluid. This fluid then enters the heat storage container 1, where it heats the solid heat storage particles 13 as it circulates downwards, raising their temperature and completing the heat storage process. Similarly, due to the aforementioned heat exchanger, the second fluid pump 4 in this embodiment is also a short-rod pump. Furthermore, a third delivery pipe 10 is included. One end of the third delivery pipe 10 is connected to the open end of the first delivery pipe 7, and the other end is connected to the fifth fluid port 411. A fourth guide port 101 is provided on the third delivery pipe 10, which is connected to the third fluid port 311 via the fourth delivery pipe 100.

[0053] Furthermore, in this embodiment, each seventh fluid port 12 is respectively disposed on the top of each heat storage container 1, and a second conveying pipe 8 is also included. The second conveying pipe 8 is horizontally disposed above each heat storage container 1. The second conveying pipe 8 has a second guide port 81 corresponding to each heat storage container 1. The seventh fluid port 12 of each heat storage container 1 is in fluid communication with the corresponding second guide port 81. The second conveying pipe 8 also has a third guide port 82, which is in fluid communication with the output end of the electric heater 5.

[0054] The term "fluid connectivity" as used in this utility model refers to the spatial relationship between two components or parts, collectively referred to as the first part and the second part, meaning that a fluid, gas, liquid, or a mixture of both can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first and second parts, or an indirect connection between the first and second parts through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. A high-temperature heat storage and heat exchange device, characterized in that, include: The heat storage container (1) has a first fluid port (11) for the flow of heat-conducting fluid; The storage tank (2) is used to store the heat-conducting fluid and has a second fluid port (21) for the heat-conducting fluid to flow through, which is in fluid communication with the first fluid port (11). A first fluid pump (3) is used to drive the heat transfer fluid from the heat storage container (1) through the first fluid port (11) and the second fluid port (21) into the storage tank (2), thereby causing a change in the liquid level of the heat transfer fluid in the heat storage container (1); Furthermore, the aforementioned storage tank (2) and the heat storage container (1) also have a fluid channel that allows the heat-conducting fluid in the storage tank (2) to flow back to the heat storage container (1).

2. The high-temperature heat storage and heat exchange device as described in claim 1, characterized in that, It also includes a transfer box (31), through which the heat transfer fluid in the heat storage container (1) flows into the storage tank (2), and at the same time, the heat transfer fluid in the storage tank (2) flows into the heat storage container (1) through the transfer box (31). The first fluid pump (3) is installed in the transfer box (31).

3. The high-temperature heat storage and heat exchange device as described in claim 2, characterized in that, The transfer box (31) is the first pump tank of the first fluid pump (3). The first pump tank has a third fluid port (311) and a fourth fluid port (312). The third fluid port (311) is in fluid communication with the first fluid port (11), and the fourth fluid port (312) is in fluid communication with the second fluid port (21). Furthermore, the aforementioned first fluid pump (3) has at least two states: In the first state, the first fluid pump (3) drives the heat transfer fluid from the storage tank (2) through the transfer box (31) into the heat storage container (1); In the second state, the first fluid pump (3) drives the heat transfer fluid from the heat storage container (1) through the transfer box (31) into the storage tank (2).

4. The high-temperature heat storage and heat exchange device as described in claim 1, characterized in that, The amount of heat-conducting fluid in the tank (2) changes repeatedly between filling and emptying.

5. The high-temperature heat storage and heat exchange device as described in claim 2, characterized in that, The transfer box (31) is the first pump tank of the first fluid pump (3). The first pump tank has a third fluid port (311) and a fourth fluid port (312). The third fluid port (311) is in fluid communication with the first fluid port (11), and the fourth fluid port (312) is in fluid communication with the second fluid port (21). The storage tank (2) is positioned above the highest liquid level of the heat storage container (1); The first fluid pump (3) is used to drive the heat transfer fluid from the heat storage container (1) into the storage tank (2), and when the first fluid pump (3) stops running, the heat transfer fluid will flow back to the heat storage container (1) under the action of gravity.

6. The high-temperature heat storage and heat exchange device according to any one of claims 1 to 5, characterized in that, It also includes a second fluid pump (4) for conveying the heat transfer fluid and an electric heater (5) for heating the heat transfer fluid. The second pump tank (41) of the second fluid pump (4) has a fifth fluid port (411) and a sixth fluid port (412), and the electric heater (5) has a fluid inlet (51) and a fluid outlet (52). The heat storage container (1) also has a seventh fluid port (12). Furthermore, the fifth fluid port (411) is in fluid communication with the first fluid port (11), the sixth fluid port (412) is in fluid communication with the fluid inlet (51), and the fluid outlet (52) is in fluid communication with the seventh fluid port (12). Thus, the second fluid pump (4) can draw the heat-conducting fluid from the bottom of the heat storage container (1), heat it through the electric heater (5), and then let it flow into the heat storage container (1).

7. The high-temperature heat storage and heat exchange device according to any one of claims 1 to 5, characterized in that, It also includes a heat exchanger for exchanging heat with a heat-conducting fluid. The heat exchanger includes a heat exchange tube (6) arranged in the heat storage container (1) along the length direction of the heat storage container (1). In the working state, water flowing in from one end of the heat exchange tube (6) is heated into steam in the heat exchange tube (6) and flows out from the other end. Alternatively, steam flowing in from one end of the heat exchange tube (6) is condensed in the heat exchange tube (6) and flows out from the other end.

8. The high-temperature heat storage and heat exchange device according to any one of claims 1 to 5, characterized in that, The heat storage container (1) is tubular and extends vertically. The top of the heat storage container (1) is closed, while the first fluid port (11) is opened at the bottom of the heat storage container (1). The heat storage container (1) is filled with solid heat storage particles (13) with a density greater than that of the heat-conducting fluid and capable of exchanging heat with the heat-conducting fluid. The solid heat storage particles (13) can be isolated in the heat storage container (1).

9. The high-temperature heat storage and heat exchange device as described in claim 8, characterized in that, The heat storage container (1) consists of at least two arranged side by side, with a connecting port (14) opened on the opposite side wall of the adjacent heat storage container (1) and connected by a connecting pipe (15).

10. The high-temperature heat storage and heat exchange device as described in claim 9, characterized in that, Each heat storage container (1) is divided into two layers: a fluid layer (1a) containing only heat-conducting fluid and a mixed layer (1b) below the fluid layer (1a). The mixed layer (1b) contains both the solid heat storage particles (13) and the heat-conducting fluid. Each communication port (14) is opened on the side wall corresponding to the fluid layer (1a) of the heat storage container (1).

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