A molten salt storage device capable of adjusting temperature and humidity

Abstract

The present invention is applicable to the technical field of molten salt storage, and provides a molten salt storage device with adjustable temperature and humidity, including a storage tank, a guide plate, a heat exchange unit, and a control unit; the storage tank is used to store molten salt in a melted state; the guide plate is arranged inside the storage tank, and is used to accelerate the passage of solid molten salt by rotation when the molten salt in a solid state is injected into the storage tank for the first time; the heat exchange unit is arranged at the bottom of the guide plate, and the heat exchange unit cooperates with the guide plate by rotation to ensure the heat exchange efficiency of the molten salt; the control unit is electrically connected to the guide plate and the heat exchange unit, and the control unit is used to control the guide plate and the heat exchange unit. The device solves the problem that a thermocline layer will be generated after the liquid molten salt is stored, resulting in a large difference in its internal temperature, resulting in low energy storage and heat exchange power generation efficiency, and achieves the goal of making the internal temperature of the liquid molten salt tend to be consistent by destroying the thermocline layer, thereby ensuring the energy storage and heat exchange power generation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of molten salt storage, and more particularly to a molten salt storage device capable of adjusting temperature and humidity. Background Art

[0002] Molten salt is a mixture of salts that is liquid at high temperatures, usually composed of a combination of two or more salts, with high thermal stability, good thermal conductivity and electrochemical properties. They are widely used in solar thermal power generation, nuclear energy storage, chemical reaction media and battery electrolytes. Due to their excellent thermal conductivity and chemical stability, they have become key materials for efficient energy conversion and storage.

[0003] At present, molten salts on the market are usually used for energy storage. Generally speaking, large molten salt energy storage plants usually use cold tanks and hot tanks for storage. Solar energy is used to heat the molten salt in the cold tank to more than 600 degrees. Then, after the sun sets, the molten salt above 600 degrees in the hot tank is used to generate electricity. This molten salt energy storage power generation can efficiently use solar energy for energy storage and power generation. Although this power generation method is clean and efficient, it is limited by weather conditions, and this equipment occupies a large area. It can be used to generate electricity in remote areas, but it is difficult to implement in cities.

[0004] Therefore, there is a technology that merges the molten salt hot tank and the cold tank into one tank, stores the molten salt in one tank, and uses electricity to heat the molten salt in the tank during valley electricity prices, and uses the heated molten salt to generate electricity during peak electricity prices. This power generation method can solve the problem that molten salt can only be used for energy storage and power generation using large equipment. At the same time, this method not only saves electricity prices, but to a certain extent, this technology can solve the problem of peak electricity consumption congestion in cities and reduce the risk of urban power system failures.

[0005] However, this single-tank molten salt energy storage and heating method has certain problems because it abandons the heat exchange between the two tanks. In large-scale molten salt energy storage and discharge facilities with two tanks, although the molten salt in the tank will have a thermocline layer due to long-term storage, the temperature and humidity in the two tanks are the same, and heat exchange and discharge are carried out through the equipment outside the tank. Therefore, the thermocline layer will not have a significant impact on its heat exchange efficiency; however, when using molten salt stored in a single tank, since heat exchange is carried out inside the tank, the existence of the thermocline layer and the simultaneous action of heat exchange will cause the molten salt inside the tank to have a large temperature and humidity difference, thereby reducing the heat exchange efficiency. Therefore, a molten salt storage device with adjustable temperature and humidity is proposed to solve the above problems. Summary of the invention

[0006] In view of the shortcomings of the prior art, the object of the present invention is to provide a molten salt storage device with adjustable temperature and humidity.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A molten salt storage device capable of adjusting temperature and humidity, comprising a storage tank, a guide plate, a heat exchange unit, and a control unit;

[0009] The storage tank is used to store molten salt in a melted state;

[0010] The guide plate is arranged inside the storage tank, and is used to accelerate the passage of the molten salt in the solid state by rotating when the molten salt in the solid state is first injected into the storage tank;

[0011] The heat exchange unit is arranged at the bottom of the guide plate, and the heat exchange unit cooperates with the guide plate by rotation to ensure the heat exchange efficiency of the molten salt;

[0012] The heat exchange unit comprises a heating rod, which is arranged in the center of the tank along the vertical direction, and a guide plate is rotatably connected to the heating rod, and four groups of porous media are rotatably connected to the heating rod, and a group of heat exchange tubes are installed at the corresponding position outside each group of porous media;

[0013] The control unit is electrically connected to the guide plate and the heat exchange unit, and is used to control the guide plate and the heat exchange unit, including controlling the rotation speed and rotation direction of the guide plate and the heat exchange unit;

[0014] The control unit includes several groups of temperature and humidity monitoring modules and temperature and humidity feedback modules, wherein the several groups of temperature and humidity monitoring modules are arranged on the inner wall of the tank cover, and the temperature and humidity inside the storage tank are monitored through the several groups of temperature and humidity monitoring modules; the temperature and humidity feedback module receives the information transmitted by the several groups of temperature and humidity monitoring modules.

[0015] By adopting the above technical solution, the present invention stores liquid molten salt in a storage tank, heats the liquid molten salt for energy storage at valley electricity prices, and uses the heated liquid molten salt for power generation at peak electricity prices. This molten salt energy storage and power generation mode can save electricity prices and avoid impacting the urban power system. Correspondingly, in this process, after the liquid molten salt stores energy, due to the characteristics of the liquid molten salt, a thermocline layer is easily formed, resulting in a large temperature difference in the liquid molten salt in the storage tank. This temperature difference will cause the liquid molten salt in the storage tank to store energy. The efficiency is low, and due to the temperature difference caused by the thermocline layer, to a certain extent, the temperature difference between the top and bottom of the molten salt in the storage tank is large due to the temperature difference of the thermocline layer, which will cause a decrease in heat exchange efficiency. In the present invention, the presence of the first porous medium and the second porous medium can ensure the efficient energy storage of the liquid molten salt in the storage tank, and the first porous medium and the second porous medium can rotate to change the flow direction of the liquid molten salt in the storage tank, destroy the thermocline layer, make the temperature of the liquid molten salt consistent, and avoid the occurrence of low efficiency of energy storage and heat exchange power generation.

[0016] The present invention is further configured as follows: the storage tank comprises a base, a tank body is mounted on the top of the base, the tank body is configured as a hollow cylinder, a tank cover is configured as an arched shape, and a connecting hole is opened on the top of the tank body.

[0017] The present invention is further configured as follows: the guide plate includes a guide hole surroundingly opened on the guide plate, and a groove is opened on the side wall of the guide plate, and a plurality of groups of connecting rods are inserted in the groove.

[0018] The present invention is further configured as follows: the porous medium includes a first porous medium and a second porous medium rotatably connected to the heating rod, the first porous medium and the second porous medium are arranged opposite to each other, and the first porous medium and the second porous medium together form a cylinder.

[0019] By adopting the above technical solution, the shape of the first porous medium is designed to change the flow direction of the liquid molten salt. The first porous medium changes the flow direction of the liquid molten salt by rotating. Since the first porous medium forms an upward inclined surface in a clockwise direction, when the first porous medium rotates, it drives the liquid molten salt around it to move in a spiral upward trajectory. Through this spiral upward movement, the incline layer formed by the liquid molten salt can be destroyed, thereby avoiding the problem of inconsistent heat exchange efficiency caused by the incline layer.

[0020] The present invention is further configured as follows: the temperature and humidity monitoring module includes a temperature and humidity monitoring probe, the temperature and humidity monitoring probe is arranged on the inner wall of the tank cover, and the temperature and humidity monitoring module transmits the monitored temperature and humidity information to the temperature and humidity feedback module at intervals of a time period T.

[0021] The present invention is further configured as follows: the temperature and humidity monitoring probes divide the storage tanks into multiple layers according to different placement positions, the number of layers is controlled according to storage tanks of different heights, and the placement density of the temperature and humidity monitoring probes is selected according to storage tanks of different heights.

[0022] The present invention is further configured as follows: the temperature and humidity feedback module includes a temperature and humidity receiving module, a temperature and humidity processing module, and a control module;

[0023] Among them, the temperature and humidity receiving module is used to receive the temperature and humidity information transmitted by the temperature and humidity monitoring module; the temperature and humidity processing module is used to analyze and process the temperature and humidity information transmitted by the temperature and humidity monitoring module; the control module is used to control and process the guide plate and the heat exchange unit according to the information analyzed by the temperature and humidity processing module;

[0024] The temperature and humidity information includes the layer location, temperature, humidity, and monitoring time.

[0025] The present invention is further configured that the temperature and humidity processing module is used to analyze and process the temperature and humidity information transmitted by the temperature and humidity monitoring module, and the specific steps are as follows:

[0026] S01. Establish temperature and humidity statistics table;

[0027] S02, recording the temperature and humidity information into a temperature and humidity statistics table;

[0028] If the table lacks temperature and humidity information at a certain moment, the interpolation algorithm is used to calculate and fill in the gaps, thus improving the temperature and humidity statistics table and avoiding errors caused by missing values ​​in the table.

[0029] If the table contains the temperature and humidity information at a certain moment, the execution continues;

[0030] Among them, since the temperature and humidity change is a linear change, the interpolation algorithm in S02 specifically adopts a linear interpolation algorithm, using the previous set of temperature and humidity information closest to the current vacancy value and the next set of temperature and humidity information for linear calculation;

[0031] Set the previous set of temperature information to A1, and the previous set of humidity information to B1; set the next set of temperature information to A2, and the next set of humidity information to B2, set the temperature information of the vacant position to X, and the humidity information of the vacant position to Y, and set the monitoring time of the vacant position to S. The previous set of temperature and humidity monitoring time is S1, and the next set of temperature and humidity monitoring time is S2. The calculation formula for the vacant position is:

[0032] X=A1+[(A2-A1)÷(S2-S1)×T],

[0033] Y=B1+[(B2-B1)÷(S2-S1)×T],

[0034] Among them, since the temperature and humidity monitoring is carried out in a time period, the monitoring time of the vacant position is set to the time interval after the previous temperature and humidity monitoring time. The calculation formula of S is:

[0035] S=S1+T,

[0036] S03. Perform a comparison based on the temperature and humidity statistics table information, wherein the comparison content includes temperature and humidity change comparison information and temperature and humidity difference comparison information.

[0037] The present invention is further configured as follows:

[0038] The specific content of the temperature and humidity change comparison information is: the temperature and humidity information at different times at the same level;

[0039] The temperature and humidity difference comparison information is: the temperature and humidity information at different levels at the same time.

[0040] The present invention is further configured as follows: the temperature and humidity change comparison information is used to obtain the current temperature change trend, the current heat exchange efficiency is obtained according to the temperature change trend, and the flow rate of the heat exchange unit is controlled according to the current heat exchange efficiency.

[0041] The temperature and humidity difference comparison information is used to obtain whether the molten salt in the current storage tank forms a thermocline layer. According to the temperature difference of the thermocline layer, the rotation direction and rotation speed of the heat exchange unit are controlled. By controlling the rotation direction and rotation speed of the heat exchange unit, the temperature of each level position in the storage tank is changed, thereby destroying the thermocline layer formed in the storage tank.

[0042] In summary, the present application includes at least one of the following beneficial technical effects:

[0043] 1. The present invention stores liquid molten salt in a storage tank, heats the liquid molten salt for energy storage at valley electricity prices, and uses the heated liquid molten salt for power generation at peak electricity prices. This molten salt energy storage and power generation mode can save electricity prices and avoid impacts on urban power systems. Correspondingly, in this process, after the liquid molten salt stores energy, a thermocline layer is easily formed due to the characteristics of the liquid molten salt, resulting in a large temperature difference in the liquid molten salt in the storage tank. This temperature difference will result in low energy storage efficiency of the liquid molten salt in the storage tank. And because of the temperature difference caused by the thermocline layer, to a certain extent, the temperature difference between the top and bottom of the molten salt in the storage tank is large due to the temperature difference of the thermocline layer, which will cause a decrease in heat exchange efficiency. In the present invention, the presence of the first porous medium and the second porous medium can ensure the efficient energy storage of the liquid molten salt in the storage tank, and the first porous medium and the second porous medium can be rotated to change the flow direction of the liquid molten salt in the storage tank, destroy the thermocline layer, make the temperature of the liquid molten salt consistent, and avoid the occurrence of low efficiency of energy storage and heat exchange power generation.

[0044] 2. In the present invention, a first porous medium and a second porous medium are provided. When a thermocline phenomenon occurs in the liquid molten salt stored in the storage tank, after stratification, the temperature of the upper layer is higher, and the temperature has obvious stratification similar to a step-like structure. At this time, the temperature and humidity difference comparison information value is higher than the temperature and humidity difference threshold. When this happens, the control unit controls the first porous medium to rotate clockwise. Since the first porous medium has an inclined plane in the clockwise direction, the flow direction of the liquid molten salt in the storage tank can be changed. After the first porous medium rotates, the second porous medium is controlled to rotate, and the flow direction of the liquid molten salt in the storage tank is changed again. The two steps can ensure that the liquid molten salt in the storage tank undergoes sufficient flow direction changes. By changing the flow direction, the thermocline layer is broken, thereby avoiding a large temperature difference in the storage tank due to the existence of the thermocline layer, thereby ensuring heat exchange and energy storage efficiency.

[0045] 3. The present invention monitors the temperature and humidity of different levels according to the time period. In the actual monitoring process, there may be a situation where monitoring is lost. Since the temperature and humidity changes are linear, and the small error does not affect the overall control of the device, an interpolation algorithm can be used to fill in the missing values. The interpolation algorithm specifically uses a linear interpolation algorithm, using the previous set of temperature and humidity information closest to the current vacant value and the next set of temperature and humidity information for linear calculation; to ensure that there is no data missing. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a schematic structural diagram of a molten salt storage device capable of adjusting temperature and humidity according to the present invention.

[0047] Figure 2 For the present invention Figure 1 Schematic diagram of the explosion.

[0048] Figure 3 For the present invention Figure 2 Partial detail diagram.

[0049] Figure 4 It is a schematic diagram of the structure of the porous medium in the present invention.

[0050] Figure 5 Schematic diagram of the thermocline layer in the present invention.

[0051] Figure 6 The present invention is a schematic diagram of the connection between a molten salt storage device capable of adjusting temperature and humidity and an external power generation device.

[0052] Figure 7 Schematic diagram of different rotation modes of the porous medium in the present invention.

[0053] Description of reference numerals: 1, storage tank; 11, tank cover; 12, tank body; 13, base;

[0054] 2. drainage plate; 21. drainage hole; 22. connecting rod;

[0055] 3. Heat exchange unit; 31. Heating rod; 32. Porous medium; 321. First porous medium; 322. Second porous medium; 33. Heat exchange tube. DETAILED DESCRIPTION

[0056] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0058] See also Figure 1-Figure 7 , the present invention provides the following technical solutions:

[0059] For example, see Figure 1-Figure 6, a molten salt storage device with adjustable temperature and humidity, comprising a storage tank 1, a guide plate 2, a heat exchange unit 3, and a control unit; wherein the storage tank 1 is used to store molten salt in a melted state, and at the same time, the storage tank 1 can convert solid molten salt into molten salt in a melted state; the storage tank 1 is made of heat-insulating material to prevent heat loss of liquid molten salt. The guide plate 2 is arranged inside the storage tank 1, and is used to accelerate the passage of the molten salt in the solid state by rotating when the molten salt in the solid state is first injected into the storage tank 1, so as to avoid blockage of the molten salt in the solid state; the heat exchange unit 3 is arranged at the bottom of the guide plate 2, and the heat exchange unit 3 cooperates with the guide plate 2 by rotating to ensure the heat exchange efficiency of the molten salt.

[0060] The control unit is electrically connected to the guide plate 2 and the heat exchange unit 3. The control unit is used to control the guide plate 2 and the heat exchange unit 3, including controlling the rotation speed and rotation direction of the guide plate 2 and the heat exchange unit 3; the control unit includes several groups of temperature and humidity monitoring modules and temperature and humidity feedback modules, wherein several groups of temperature and humidity monitoring modules are arranged on the inner wall of the tank cover 11, and the temperature and humidity inside the storage tank 1 are monitored through several groups of temperature and humidity monitoring modules; the temperature and humidity feedback module receives information transmitted by several groups of temperature and humidity monitoring modules.

[0061] It should be noted that the control unit here is a person of ordinary skill in the art who can understand that all or part of the steps carried by the method of the above-mentioned embodiment can be completed by instructing related hardware through a program, and the control unit can be stored in a computer-readable storage medium. When the program is executed, it includes one of the steps of the method embodiment or a combination thereof.

[0062] In this embodiment, specifically: the storage tank 1 includes a base 13, a tank body 12 is installed on the top of the base 13, the base 13 is adapted in shape to the tank body 12, the base 13 provides an installation environment for the tank body 12, the tank body 12 is configured to be a hollow cylinder, a tank cover 11 is provided on the top of the tank body 12, the tank cover 11 has the same diameter as the tank body 12 and is adapted in shape, the tank cover 11 is configured to be arched, and a connecting hole is opened on the top, the connecting hole is used to connect an external molten salt injection device, and solid molten salt can be injected into the tank body 12 through the connecting hole.

[0063] See also Figure 3 The drain plate 2 can rotate horizontally relative to the tank body 12. The drain plate 2 includes a drain hole 21 arranged around the drain plate 2. The drain hole 21 is for the solid molten salt to pass through. The rotation of the drain plate 2 can drive the rotation of the drain hole 21, drive the solid molten salt to pass through, and avoid the blockage of the solid molten salt. The side wall of the drain plate 2 is provided with a groove, and a plurality of groups of connecting rods 22 are inserted in the groove. The rotation of the drain plate 2 can drive the connecting rods 22 to rotate. After the molten salt becomes liquid, the rotation of the connecting rods 22 can accelerate the flow of the liquid molten salt to a certain extent.

[0064] See also Figure 3 The heat exchange unit 3 includes a heating rod 31, which is arranged in the center of the tank body 12 in the vertical direction. The heating rod 31 is rotatably connected to a guide plate 2, and the guide plate 2 can rotate relative to the heating rod 31. Four groups of porous media 32 are rotatably connected to the heating rod 31, and a group of heat exchange tubes 33 are installed at the corresponding position outside each group of porous media 32. The heat exchange tubes 33 are connected to an external power generation device, and the external power generation device is connected to the regional power grid. The liquid molten salt inside the storage tank 1 is heated by heat exchange through the heat exchange tubes 33, and this step occurs at peak electricity prices. At valley electricity prices, the liquid molten salt inside the storage tank 1 is heated by heating the heating rod 31.

[0065] The four groups of porous media 32 are composed of a first porous medium 321 and a second porous medium 322 . The first porous medium 321 and the second porous medium 322 are arranged opposite to each other, and the first porous medium 321 and the second porous medium 322 together form a cylinder.

[0066] Specifically, see Figure 7 The first porous medium 321 and the second porous medium 322 have the same principle, only the direction of the inclined surface is different. Here, only the specific details of the first porous medium 321 are explained. The second porous medium 322 is similar to the first porous medium 321. The shape of the first porous medium 321 is designed to change the flow direction of the liquid molten salt. The first porous medium 321 changes the flow direction of the liquid molten salt by rotating. Since the first porous medium 321 forms an inclined surface in a clockwise direction, when the first porous medium 321 rotates, it drives the liquid molten salt around it to move in a spiral upward motion trajectory. Through this spiral upward motion, the incline layer formed by the liquid molten salt can be destroyed, thereby avoiding the problem of inconsistent heat exchange efficiency caused by the incline layer. Correspondingly, referring to the comparative situation, in the prior art, the porous medium 32 usually adopts a cylindrical shape that is compatible with the shape of the storage tank 1. However, if a cylindrical porous medium 32 is used here, although the liquid molten salt in the storage tank 1 can flow by the rotation of the porous medium 32, at this moment, the flow direction of the liquid molten salt will not change due to the rotation of the porous medium 32, and therefore it is difficult to destroy the thermocline layer formed by the liquid molten salt.

[0067] Correspondingly, a group of first porous media 321 and a second porous medium 322 can constitute a group of porous media 32. Each group of porous media 32 acts as a cylinder and can also rotate synchronously in the same direction. This rotation method can accelerate the flow of the molten salt without changing the flow direction of the liquid molten salt in the storage tank 1. This method can accelerate the heat exchange of the liquid molten salt to a certain extent. Moreover, during the heating process, since the heating rod 31 is arranged at the center of the storage tank 1, this method can make the external molten salt contact the surface of the heating rod 31 by accelerating the flow, thereby ensuring the heating efficiency of the liquid molten salt.

[0068] In this embodiment, specifically: the temperature and humidity monitoring module includes a temperature and humidity monitoring probe, which is arranged on the inner wall of the tank cover 11. The temperature and humidity monitoring module transmits the monitored temperature and humidity information to the temperature and humidity feedback module at intervals of a time period T; wherein, the selection of the time period T is determined according to different storage conditions. Generally speaking, under conditions of large environmental changes, the shorter the time period T is.

[0069] Among them, the temperature and humidity monitoring probes divide the storage tank 1 into multiple layers according to different placement positions, the number of layers is controlled according to the storage tanks 1 at different heights, and the density of placement of the temperature and humidity monitoring probes is selected according to the storage tanks 1 at different heights.

[0070] Correspondingly, in many systems for monitoring temperature and humidity, a grid division is usually adopted, which can monitor the environment to be monitored more finely; however, in the present embodiment, if a grid division method is adopted, there is a waste of resources. Due to the storage characteristics of liquid molten salt, the temperature in the same plane usually does not have a large difference, but only a longitudinal temperature comparison difference. Therefore, a multi-layer division method is adopted in the present embodiment.

[0071] In this embodiment, specifically: the temperature and humidity feedback module includes a temperature and humidity receiving module, a temperature and humidity processing module, and a control module;

[0072] Among them, the temperature and humidity receiving module is used to receive the temperature and humidity information transmitted by the temperature and humidity monitoring module; the temperature and humidity processing module is used to analyze and process the temperature and humidity information transmitted by the temperature and humidity monitoring module; the control module is used to control and process the guide plate 2 and the heat exchange unit 3 according to the information analyzed by the temperature and humidity processing module;

[0073] Among them, the temperature and humidity information includes the hierarchical position, temperature, humidity, and monitoring time; the statistical hierarchical position can determine at which level the currently monitored temperature and humidity are located, thereby determining the temperature at different positions in the storage tank 1, and the statistical monitoring time is to determine the temperature and humidity of the same level at different times. In the actual monitoring process, the monitoring temperature and humidity may be missed due to various reasons, and the statistical monitoring time can also ensure that the missing data is filled after the omission, so as to ensure the accuracy of the calculation results.

[0074] In this embodiment, specifically, the temperature and humidity processing module is used to analyze and process the temperature and humidity information transmitted by the temperature and humidity monitoring module. The specific steps are as follows:

[0075] S01. Establish temperature and humidity statistics table;

[0076] The temperature and humidity statistics table records all temperature and humidity information. The specific parameters counted in the temperature and humidity statistics table are: layer position, temperature, humidity, monitoring time, and the defined time period T.

[0077] S02, recording the temperature and humidity information into a temperature and humidity statistics table;

[0078] In the actual monitoring process, there may be situations where monitoring is lost.

[0079] If the table lacks temperature and humidity information at a certain moment, the interpolation algorithm is used to calculate and fill in the gaps, thus improving the temperature and humidity statistics table and avoiding errors caused by missing values ​​in the table.

[0080] If the table contains the temperature and humidity information at a certain moment, the execution continues;

[0081] Among them, since the temperature and humidity change is a linear change, and a small error does not affect the overall control of the device, an interpolation algorithm can be used to fill in the missing values. The interpolation algorithm in S02 specifically adopts a linear interpolation algorithm, and uses the previous set of temperature and humidity information closest to the current missing value and the next set of temperature and humidity information for linear calculation;

[0082] Set the previous set of temperature information to A1, and the previous set of humidity information to B1; set the next set of temperature information to A2, and the next set of humidity information to B2, set the temperature information of the vacant position to X, and the humidity information of the vacant position to Y, and set the monitoring time of the vacant position to S. The previous set of temperature and humidity monitoring time is S1, and the next set of temperature and humidity monitoring time is S2. The calculation formula for the vacant position is:

[0083] X=A1+[(A2-A1)÷(S2-S1)×T],

[0084] Y=B1+[(B2-B1)÷(S2-S1)×T],

[0085] Among them, since the temperature and humidity monitoring is carried out according to the time period, the monitoring time of the vacant position is set to the time interval after the previous temperature and humidity monitoring time. The calculation formula of the monitoring time S of the vacant position is:

[0086] S=S1+T,

[0087] S03. Perform a comparison based on the temperature and humidity statistics table information, wherein the comparison content includes temperature and humidity change comparison information and temperature and humidity difference comparison information.

[0088] Accordingly, the loss of temperature and humidity monitoring may result in not only one set of data being lost, but also continuous loss. When this happens, the linear interpolation algorithm can be used to fill in the gaps. The calculation formula of S needs to be changed according to the different numbers and positions of losses. If five sets of values ​​are missing, when calculating the first set of lost values, the previous set of data and the sixth set of data (not lost) are used for calculation. After the first set of lost values ​​is obtained, it is used as the previous set of data to continue with further linear interpolation calculations.

[0089] The specific content of the temperature and humidity change comparison information is: the temperature and humidity information at different times at the same level;

[0090] The temperature and humidity difference comparison information is: the temperature and humidity information at different levels at the same time.

[0091] In the present embodiment, specifically: the temperature and humidity change comparison information is used to obtain the current temperature change trend, the current heat exchange efficiency is known according to the temperature change trend, and the flow rate of the heat exchange unit 3 is controlled according to the current heat exchange efficiency; it needs to be further explained that the temperature and humidity change comparison information is only used in the liquid molten salt heat exchange power generation process. Due to the insulation effect of the storage tank 1, the liquid molten salt in the energy storage state only does not have the possibility of drastic temperature and humidity changes. Generally speaking, there is only a slow cooling; and in the heating process, the temperature and humidity change itself is the process of electric energy heating the liquid molten salt. Therefore, the temperature and humidity change of the molten salt in the heating process is no longer within the scope of this comparison consideration.

[0092] The temperature and humidity difference comparison information is used to obtain whether the molten salt in the current storage tank 1 forms a thermocline layer. According to the temperature difference of the thermocline layer, the rotation direction and rotation speed of the heat exchange unit 3 are controlled. By controlling the rotation direction and rotation speed of the heat exchange unit 3, the temperature of each level position in the storage tank 1 is changed, thereby destroying the thermocline layer formed in the storage tank 1.

[0093] Specifically, the operator can set different temperature and humidity change thresholds and temperature and humidity difference thresholds according to different usage scenarios. If the temperature and humidity change comparison information value is greater than the temperature and humidity change threshold, it means that the current temperature and humidity change of the layer exceeds the established range, indicating that the current temperature and humidity change speed is too fast. Usually, this situation occurs during the heat exchange process, indicating that the heat exchange is too fast. This phenomenon of too fast heat exchange, to a certain extent, will cause the molten salt to crystallize easily and may cause blockage. Therefore, if the temperature and humidity change comparison information value is greater than the temperature and humidity change threshold, the control unit retrieves the temperature and humidity statistics table and slows down the flow rate of the heat exchange liquid in the heat exchange tube 33 of the current layer to avoid damage caused by too fast heat exchange.

[0094] Specifically, the temperature and humidity difference comparison information is used to determine whether the temperature and humidity in the storage tank 1 are uneven. This unevenness is usually caused by a thermocline layer. Therefore, by determining whether the temperature and humidity difference comparison information value exceeds the temperature and humidity difference threshold, the occurrence of the thermocline layer can be determined.

[0095] When the liquid molten salt stored in the storage tank 1 has a thermocline phenomenon, after stratification, the upper layer has higher temperature, and the temperature has obvious step-like stratification. At this time, the temperature and humidity difference comparison information value is higher than the temperature and humidity difference threshold. When this happens, the control unit controls the first porous medium 321 to rotate clockwise. Since the first porous medium 321 has an upward inclined plane in the clockwise direction, the flow direction of the liquid molten salt in the storage tank 1 can be changed. After the first porous medium 321 rotates, the second porous medium 322 is controlled to rotate to change the flow direction of the liquid molten salt in the storage tank 1 again. The two steps can ensure that the liquid molten salt in the storage tank 1 has sufficient flow direction changes. Through the change in flow direction, its thermocline layer is broken, thereby avoiding the large temperature difference in the storage tank 1 caused by the existence of the thermocline layer, and ensuring the heat exchange and energy storage efficiency.

[0096] Correspondingly, the phenomenon of destroying the liquid molten salt thermocline layer can also be achieved by changing the heat transfer efficiency of a certain layer. However, in actual use, liquid molten salt is not needed for heat exchange and power generation all the time. When power generation is not required, the heat exchange tube 33 inside the storage tank 1 is not started. Therefore, when only energy is stored but not generated, it is not feasible to change the heat transfer efficiency. The thermocline layer can only be destroyed by rotating the porous medium 32.

[0097] The device embodiments described above are merely illustrative and are not all embodiments. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms. All other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

Claims

1. A molten salt storage device capable of adjusting temperature and humidity, characterized in that: It comprises a storage tank (1), a guide plate (2), a heat exchange unit (3), and a control unit; The storage tank (1) is used to store molten salt in a melted state; The guide plate (2) is arranged inside the storage tank (1) and is used to accelerate the passage of the molten salt in the solid state by rotating when the molten salt in the solid state is first injected into the storage tank (1); The heat exchange unit (3) is arranged at the bottom of the guide plate (2), and the heat exchange unit (3) cooperates with the guide plate (2) by rotating to ensure the heat exchange efficiency of the molten salt; The heat exchange unit (3) comprises a heating rod (31), the heating rod (31) being arranged at the center of the tank body (12) in a vertical direction, the heating rod (31) being rotatably connected to a guide plate (2), the heating rod (31) being rotatably connected to four groups of porous media (32), and a group of heat exchange tubes (33) being installed at corresponding positions outside each group of porous media (32); The porous medium (32) comprises a first porous medium (321) and a second porous medium (322) which are rotatably connected to the heating rod (31); the first porous medium (321) and the second porous medium (322) are arranged opposite to each other; the first porous medium (321) and the second porous medium (322) together form a cylinder; the first porous medium (321) and the second porous medium (322) have the same principle and only have different inclined surfaces; The control unit is electrically connected to the guide plate (2) and the heat exchange unit (3), and is used to control the guide plate (2) and the heat exchange unit (3), including controlling the rotation speed and rotation direction of the guide plate (2) and the heat exchange unit (3); The control unit controls the first porous medium (321) to rotate clockwise. Since the first porous medium (321) has a plane inclined upward in the clockwise direction, the flow direction of the liquid molten salt in the storage tank (1) can be changed. After the first porous medium (321) rotates, the second porous medium (322) is controlled to rotate, so that the flow direction of the liquid molten salt in the storage tank (1) is changed again. These two steps can ensure that the flow direction of the liquid molten salt in the storage tank (1) changes, and the temperature cline is broken by the change in flow direction. The control unit comprises a plurality of groups of temperature and humidity monitoring modules and a temperature and humidity feedback module, wherein the plurality of groups of temperature and humidity monitoring modules are arranged on the inner wall of the tank cover (11), and the temperature and humidity inside the storage tank (1) are monitored through the plurality of groups of temperature and humidity monitoring modules; and the temperature and humidity feedback module receives information transmitted by the plurality of groups of temperature and humidity monitoring modules.

2. A molten salt storage device with adjustable temperature and humidity according to claim 1, characterized in that: The storage tank (1) comprises a base (13), a tank body (12) is mounted on the top of the base (13), the tank body (12) is arranged in a hollow cylindrical shape, a tank cover (11) is arranged on the top of the tank body (12), the tank cover (11) is arranged in an arch shape, and a connection hole is opened on the top.

3. A molten salt storage device with adjustable temperature and humidity according to claim 1, characterized in that: The guide plate (2) comprises a guide hole (21) which is arranged around the guide plate (2). A groove is arranged on the side wall of the guide plate (2), and a plurality of groups of connecting rods (22) are inserted into the groove.

4. The molten salt storage device with adjustable temperature and humidity according to claim 1, characterized in that: The temperature and humidity monitoring module comprises a temperature and humidity monitoring probe, which is arranged on the inner wall of the tank cover (11). The temperature and humidity monitoring module transmits the monitored temperature and humidity information to the temperature and humidity feedback module within a time period T.

5. A molten salt storage device with adjustable temperature and humidity according to claim 4, characterized in that: The temperature and humidity monitoring probes divide the storage tank (1) into multiple layers according to different placement positions, the number of layers is controlled according to the storage tanks (1) at different heights, and the density of placement of the temperature and humidity monitoring probes is selected according to the storage tanks (1) at different heights.

6. A molten salt storage device with adjustable temperature and humidity according to claim 4, characterized in that: The temperature and humidity feedback module includes a temperature and humidity receiving module, a temperature and humidity processing module, and a control module; The temperature and humidity receiving module is used to receive the temperature and humidity information transmitted by the temperature and humidity monitoring module; the temperature and humidity processing module is used to analyze and process the temperature and humidity information transmitted by the temperature and humidity monitoring module; and the control module is used to control and process the guide plate (2) and the heat exchange unit (3) according to the information analyzed by the temperature and humidity processing module; The temperature and humidity information includes the layer location, temperature, humidity, and monitoring time.

7. A molten salt storage device with adjustable temperature and humidity according to claim 6, characterized in that: The temperature and humidity processing module is used to analyze and process the temperature and humidity information transmitted by the temperature and humidity monitoring module. The specific steps are as follows: S01. Establish temperature and humidity statistics table; S02, recording the temperature and humidity information into a temperature and humidity statistics table; If the table lacks temperature and humidity information at a certain moment, the interpolation algorithm is used to calculate and fill in the gaps, thus improving the temperature and humidity statistics table and avoiding errors caused by missing values ​​in the table. If the table contains the temperature and humidity information at a certain moment, the execution continues; Among them, since the temperature and humidity change is a linear change, the interpolation algorithm in S02 specifically adopts a linear interpolation algorithm, using the previous set of temperature and humidity information closest to the current vacancy value and the next set of temperature and humidity information for linear calculation; Set the previous set of temperature information to A1, and the previous set of humidity information to B1; set the next set of temperature information to A2, and the next set of humidity information to B2, set the temperature information of the vacant position to X, and the humidity information of the vacant position to Y, and set the monitoring time of the vacant position to S. The previous set of temperature and humidity monitoring time is S1, and the next set of temperature and humidity monitoring time is S2. The calculation formula for the vacant position is: X=A1+[(A2-A1)÷(S2-S1)×T], Y=B1+[(B2-B1)÷(S2-S1)×T], Among them, since the temperature and humidity monitoring is carried out in a time period, the monitoring time of the vacant position is set to the time interval after the previous temperature and humidity monitoring time. The calculation formula of S is: S=S1+T, S03. Perform a comparison based on the temperature and humidity statistics table information, wherein the comparison content includes temperature and humidity change comparison information and temperature and humidity difference comparison information.

8. A molten salt storage device with adjustable temperature and humidity according to claim 7, characterized in that: The specific content of the temperature and humidity change comparison information is: the temperature and humidity information at different times at the same level; The temperature and humidity difference comparison information is: the temperature and humidity information at different levels at the same time.

9. A molten salt storage device with adjustable temperature and humidity according to claim 8, characterized in that: The temperature and humidity change comparison information is used to obtain the current temperature change trend, and the current heat exchange efficiency is obtained according to the temperature change trend, and the flow rate of the heat exchange unit (3) is controlled according to the current heat exchange efficiency; The temperature and humidity difference comparison information is used to determine whether the molten salt in the current storage tank (1) forms a thermocline layer. According to the temperature difference of the thermocline layer, the rotation direction and rotation speed of the heat exchange unit (3) are controlled. By controlling the rotation direction and rotation speed of the heat exchange unit (3), the temperature of each layer position in the storage tank (1) is changed, thereby destroying the thermocline layer formed in the storage tank (1).

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