A static high temperature molten salt tank

Abstract

The present invention relates to the technical field of high-temperature molten salt heat storage equipment, and specifically provides a static high-temperature molten salt tank, including a cold salt tank, an input pipe is arranged on the cold salt tank, a separator pipe is arranged in the input pipe, and a heating component is arranged on the outside of the input pipe, so that the molten salt can continuously surge when flowing in the input pipe, so that the temperature of the molten salt is more uniform, reducing heat exchange with the outside, thereby avoiding the temperature below the melting point, and at the same time, a concave-convex component is arranged in the first mixing section of the separator pipe, so as to further make the temperature distribution of the molten salt in the input pipe uniform. A rotating ring and a special-shaped ring sleeve are arranged on the second mixing section, so that the molten salt flowing through the second mixing section can also be mixed with the inner and outer layers, and the molten salt is sprayed by the rotating ring to provide power for the rotating ring, which can save energy.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature molten salt heat storage equipment, and in particular to a static high-temperature molten salt tank. Background Art

[0002] Molten salt thermal storage is a technology based on sensible heat storage. It uses the temperature changes of molten salt during heating and cooling to store and release thermal energy. Molten salt thermal storage technology is widely used in solar thermal power generation, industrial waste heat recovery and other high-temperature thermal energy applications.

[0003] For example, the molten salt tank is a container used to store and manage high-temperature molten salt. It is usually equipped with two tanks, namely the high-temperature molten salt tank and the cold salt tank. These two tanks store and release heat through the circulation of molten salt. Their working principle is based on the heat transfer characteristics of molten salt in high and low temperature states. The high-temperature molten salt tank stores the heated high-temperature molten salt for the system to generate electricity or heat energy; the cold salt tank stores the low-temperature molten salt after releasing heat, ready for the next round of heating. The two work together to form a complete energy circulation system.

[0004] Molten salt has a high freezing point (for example, the freezing point of solar salt is approximately 220°C). When the cold molten salt is transported to the cold salt tank for circulation, the heat exchange between the cold molten salt and the external environment causes the cold molten salt temperature to further drop, causing the molten salt to approach or fall below the freezing point, resulting in crystallization or solidification. Once the molten salt solidifies in the pipe or tank, the system will not operate normally, and the pipe needs to be unblocked or cleaned, which will result in a large loss of time and cost. Summary of the Invention

[0005] Based on this, it is necessary to provide a static high-temperature molten salt tank to address the problem that the current molten salt is prone to crystallization or solidification when flowing back into the cold salt tank, causing the system to be unable to operate.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A static high-temperature molten salt tank, comprising:

[0008] A cold salt tank is provided with an input pipe capable of transporting molten salt;

[0009] a heating assembly capable of heating the input pipe;

[0010] a flow diversion assembly, the flow diversion assembly comprising a separator tube, the separator tube being disposed within the input pipe, the separator tube separating the molten salt entering the input pipe into an inner and outer layer, the separator tube being sequentially divided into a conveying section, a first mixing section, and a second mixing section along a conveying direction, the diameter of the conveying section being smaller than the diameter of the first mixing section, the diameter of the first mixing section being larger than the diameter of the second mixing section, and through holes being provided on both the first mixing section and the second mixing section;

[0011] a concave-convex component capable of changing the flatness of the surface of the first mixing section of the separator tube, wherein the flatness of the surface of the first mixing section of the separator tube is negatively correlated with the temperature of the molten salt in the first mixing section;

[0012] The concave-convex assembly includes two cross rods, each of which is provided with a telescopic ball rod at the cross end of each cross rod. The telescopic ball rod abuts against the inner arm of the first mixing section of the separation tube. The side wall of the first mixing section is elastic. When the temperature of the outer layer of the separation tube changes, the length of the telescopic ball rod changes, and the telescopic ball rod presses the side wall of the first mixing section to make its surface convex.

[0013] Two sliding and plug-in movable frames are provided between the two cross rods, and elastic members are respectively provided at the two ends of the two movable frames away from each other. The two elastic members abut against the axis of the two cross rods. A telescopic gas rod is provided between the two movable frames and a telescopic rod is respectively provided on the ends of the two movable frames close to each other. The telescopic rods pass through the movable frames and are respectively connected to the cross rods, and the telescopic chambers of the telescopic rods are connected to the telescopic chamber of the telescopic ball rod. The length of the telescopic gas rod is positively correlated with the temperature inside the first mixing section.

[0014] Furthermore, the elastic member is a compression spring.

[0015] Furthermore, a turbine is coaxially and fixedly provided on one end of the two cross rods away from each other. When the molten salt passes through the turbine, the turbine is driven to rotate, and the turbine drives the two cross rods to rotate so that the side wall of the first mixing section fluctuates continuously.

[0016] Furthermore, the diversion assembly also includes a rotating ring, which is sleeved on the outer circumference of the second mixing section. The rotating ring is provided with a through groove, and the molten salt in the second mixing section is discharged through the through groove. The rotating ring rotates to spray out the second mixing section to mix the inner layer molten salt with the outer layer molten salt.

[0017] Furthermore, a special-shaped ring sleeve is provided on the outer side of the rotating ring, and a plurality of inclined surfaces are provided on the inner wall of the special-shaped ring sleeve. The outer periphery of the special-shaped ring sleeve is fixed on the inner wall of the input pipe, and the molten salt sprayed from the rotating ring groove is sprayed toward the inclined surfaces to drive the rotating ring to rotate.

[0018] Furthermore, the heating component includes a heating copper wire, which is spirally wound on the outer wall of the input pipe. The pitch of the heating copper wire at the conveying section of the separator pipe is greater than the pitch of the heating copper wire at the first mixing section. The pitch of the heating copper wire at the first mixing section is greater than the pitch of the heating copper wire at the second mixing section.

[0019] Furthermore, two separation tubes are provided in the input pipeline, and the separation tubes are symmetrically arranged.

[0020] Furthermore, a conical connecting tube is provided on one end of the two separating tubes away from each other, the small end of the conical connecting tube is fixedly connected to the separating tube, the large end of the conical connecting tube is fixedly connected to the inner wall of the input pipe, and a rotating stirring wheel is rotatably provided on the inner wall of the large end of the conical connecting tube, and a plurality of small holes are provided on the conical surface of the conical connecting tube. After being stirred by the stirring wheel, the molten salt enters the inner and outer layers of the input pipe respectively through the small end and the plurality of small holes of the conical connecting tube.

[0021] The beneficial effects of the present invention are:

[0022] The present invention provides a separator tube and a heating component so that the molten salt can continuously surge when flowing in the input pipe, thereby making the temperature of the molten salt more uniform, reducing heat exchange with the outside world, and thus avoiding the temperature being lower than the melting point. At the same time, a concave-convex component is provided in the first mixing section of the separator tube, thereby further making the temperature distribution of the molten salt in the input pipe uniform.

[0023] The present invention provides a rotating ring and a special-shaped ring sleeve so that the molten salt flowing through the second mixing section can also be mixed in the inner and outer layers, and the rotating ring is powered by spraying molten salt, which can save energy.

[0024] The present invention provides two symmetrical separation pipes, thereby increasing the number of times the molten salt in the input pipe of the same length is mixed, improving the temperature of the molten salt, and further preventing the molten salt from condensing due to the temperature being lower than the melting point.

[0025] The present invention gradually increases the temperature of the molten salt by adjusting the pitch of the heating copper wire at different positions, thereby avoiding heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a static high-temperature molten salt tank provided in one embodiment of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of an input pipeline of a static high-temperature molten salt tank provided in an embodiment;

[0028] Figure 3 for Figure 2 A cross-sectional view of an input pipe of a static high-temperature molten salt tank along line AA provided in an embodiment;

[0029] Figure 4 for Figure 3 A partial enlarged view of a portion X of an input pipe of a static high-temperature molten salt tank provided in an embodiment;

[0030] Figure 5 This is a schematic diagram of an exploded view of the input pipeline of a static high-temperature molten salt tank provided in one embodiment of the present invention;

[0031] Figure 6 A schematic structural diagram of a concave-convex assembly of a static high-temperature molten salt tank provided by one embodiment of the present invention;

[0032] Figure 7 An exploded schematic diagram of the concave and convex components of a static high-temperature molten salt tank provided by one embodiment of the present invention;

[0033] Figure 8 A schematic structural diagram of a special-shaped ring sleeve of a static high-temperature molten salt tank provided by one embodiment of the present invention;

[0034] Figure 9 A schematic structural diagram of a rotating ring of a static high-temperature molten salt tank provided in one embodiment of the present invention.

[0035] in:

[0036] 100, cold salt tank; 110, input pipeline; 111, first delivery pump; 120, heating copper wire; 130, output pipeline; 131, second delivery pump;

[0037] 200, flow dividing assembly; 210, separation tube; 211, conveying section; 212, first mixing section; 213, second mixing section; 214, through hole;

[0038] 300, concave-convex assembly; 310, cross rod; 311, turbine; 320, telescopic ball rod; 330, telescopic rod; 340, movable frame; 341, telescopic gas rod; 350, elastic member; 360, rotating ring; 361, through groove; 370, special-shaped ring sleeve; 371, inclined surface;

[0039] 400, conical connecting cylinder; 410, small hole; 420, stirring wheel. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0042] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0043] Reference Figures 1-9 To describe a static high-temperature molten salt tank provided by the present invention.

[0044] A static high-temperature molten salt tank includes a cold salt tank 100. An input pipe 110 and an output pipe 130 are provided at the upper end of the cold salt tank 100. The molten salt that has released heat enters the cold salt tank 100 through the input pipe 110 for storage. The output pipe 130 is used to output the molten salt in the cold salt tank 100. At the same time, a first delivery pump 111 is provided on the input pipe 110. The first delivery pump 111 is used to pump the molten salt in the first input pipe 110 into the cold salt tank 100. The output pipe 130 is provided with a second delivery pump 131. The second delivery pump 131 is used to pump the molten salt in the cold salt tank 100 into the output pipe 130. A heat preservation device (not shown in the figure) is provided at the bottom of the cold salt tank 100. The heat preservation device is used to ensure that the temperature of the molten salt inside the cold salt tank 100 is not lower than the melting point, thereby preventing the molten salt from solidifying in the cold salt tank 100. A heating component is provided on the outside of the input pipe 110. The heating component can heat the input pipe 110 to prevent the temperature of the molten salt from decreasing due to heat exchange with the outside world when being transported in the input pipe 110, thereby further preventing the molten salt from solidifying in the input pipe 110.

[0045] The input pipe 110 is provided with a flow dividing assembly 200, which includes a separation pipe 210. The separation pipe 210 divides the input pipe 110 into two layers, the inner layer and the outer layer. The separation pipe 210 is arranged along the conveying direction of the input pipe 110 (the conveying direction is Figure 3 The conveying section 211, the first mixing section 212 and the second mixing section 213 are provided on the sidewalls of the first mixing section 212 and the second mixing section 213. The diameter of the conveying section 211 is smaller than that of the first mixing section 212, and the diameter of the first mixing section 212 is larger than that of the second mixing section 213. The sidewalls of the first mixing section 212 and the second mixing section 213 are both provided with a plurality of through holes 214. The plurality of through holes 214 enable the molten salt of the two layers inside and outside the input pipe 110 to be exchanged inside and outside. When the molten salt is transported into the input pipe 110, the molten salt The salt flows through the conveying section 211, the first mixing section 212 and the second mixing section 213 in sequence. Since the diameter of the conveying section 211 is smaller than the diameter of the first mixing section 212, the diameters of the molten salt are different when it flows from the input section through the first mixing section 212, resulting in different molten salt pressures in the inner and outer layers of the conveying section 211 and the first mixing section 212, that is, the molten salt pressure in the inner layer of the first mixing section 212 is lower than the pressure of the molten salt in the outer layer, so that the molten salt in the outer layer of the first mixing section 212 enters the inner layer, thereby completing the heat exchange between the inner and outer layers.

[0046] It should be noted that, since the heating component heats the input pipe 110, the temperature of the outer layer of molten salt near the input pipe 110 is higher than the temperature of the inner layer. At this time, the diameter of the conveying section 211 and the first mixing section 212 changes, so that the molten salt of the inner and outer layers are mixed together, thereby balancing the temperature of the molten salt and avoiding the temperature of the inner layer of the molten salt being too low. When the molten salt flows from the first mixing section 212 through the second mixing section 213, since the diameter of the first mixing section 212 is greater than the diameter of the second mixing section 213, the molten salt pressure of the inner layer of the second mixing section 213 is greater than the molten salt pressure of the outer layer of the second mixing section 213. Therefore, the molten salt of the inner layer of the second mixing section 213 enters the outer layer through the through hole 214, and heat exchange is performed again, making the temperature of the molten salt in the input pipe 110 more uniform.

[0047] A concave-convex component 300 is provided in the first mixing section 212 of the separator tube 210. The concave-convex component 300 can change the flatness of the surface of the first mixing section 212 of the separator tube 210. It should be noted that if the surface is flatter, the molten salt will flow more smoothly, and if the surface is more uneven, turbulence will be generated when the molten salt flows through, which will further improve the uniformity of mixing of the molten salt in the first mixing section 212. When the temperature of the outer layer of molten salt is lower than the temperature of the inner layer (because the temperature of the molten salt is higher when it just enters the input pipe 110, when it enters the input pipe 110 and is stratified, if the temperature heated by the heating component is lower than the temperature when it just enters the input pipe 110, the temperature of the inner layer will be higher than the temperature of the outer layer), the outer layer of molten salt enters the first mixing section 212. When the molten salt inside and outside are mixed, the overall temperature of the inside will be lowered. At this time, the concave-convex component 300 increases the roughness of the surface of the first mixing section 212, thereby increasing the heat exchange efficiency of the inner and outer layers of molten salt to appropriately increase the overall temperature; if the temperature of the outer layer is higher than the temperature of the inner layer (if the temperature heated by the heating component is higher than the temperature when it just enters the input pipe 110, the temperature of the outer layer of molten salt will be higher than the temperature of the inner layer after being heated by the heating component), when the outer layer of molten salt enters the inner layer of molten salt and mixes, the overall temperature of the inside is higher. At this time, the concave-convex component 300 enhances the smoothness of the surface of the first mixing section 212 (that is, reduces the roughness of the surface of the first mixing section 212), so that the flow of the outer layer of molten salt tends to be smooth, and the heat exchange efficiency of the inner and outer layers is weakened.

[0048] By providing a separator tube 210 and a heating assembly, the molten salt can continuously surge when flowing in the input pipe 110, thereby making the temperature of the molten salt more uniform, reducing heat exchange with the outside world, and thus avoiding the temperature being lower than the melting point. At the same time, a concave-convex assembly 300 is provided in the first mixing section 212 of the separator tube 210, thereby further making the temperature distribution of the molten salt in the input pipe 110 uniform.

[0049] Specifically, the concave-convex component 300 in this embodiment includes two cross rods 310, and the two cross rods 310 have four cross ends respectively. Telescopic ball rods 320 are provided on the four cross ends. The telescopic ball rods 320 are all in contact with the inner wall of the first mixing section 212, and the side wall of the first mixing section 212 is elastic. When the temperature of the outer layer is lower than the temperature of the inner layer, the telescopic ball rods 320 extend to cause the side wall of the first mixing section 212 to deform, thereby making the side wall of the first mixing section 212 uneven, so that the molten salt passing through the surface of the first mixing section 212 can cause turbulence. The longer the telescopic ball rod 320 extends, the more uneven the surface of the first mixing section 212 becomes. When the temperature of the outer layer is lower than the temperature of the inner layer so that the overall temperature inside the first mixing section 212 decreases, the telescopic ball rod 320 extends, thereby increasing the unevenness of the surface of the first mixing section 212; when the temperature of the outer layer is higher than the temperature of the inner layer so that the overall internal temperature of the first mixing section 212 increases, the telescopic ball rod 320 shortens, thereby reducing the unevenness of the surface of the first mixing section 212.

[0050] More specifically, Figure 6 As shown, a movable frame 340 that is slidably connected to each other is provided between the two cross rods 310, and an elastic member 350 is provided on the end of the movable frame 340 that is away from each other. The elastic member 350 is a compression spring, and the other end of the elastic member 350 is respectively connected to the cross rod 310. The elastic member 350 is in a compressed state in the initial state, that is, the elastic member 350 pushes the two sliding frames so that the two sliding frames tend to approach each other. A telescopic gas rod 341 is provided between the two movable frames 340, and there is gas inside the telescopic gas rod 341. The telescopic gas rod 341 is a sensing member. When the temperature in the first mixing section 212 increases, the telescopic gas rod 341 can be extended, and when the temperature in the first mixing section 212 decreases, the telescopic gas rod 341 can be shortened. Four telescopic rods 330 are respectively provided on one end of the two movable frames 340 that are close to each other. The four telescopic rods 330 cross the two movable frames 340 to connect the two cross rods 310 respectively. The telescopic cavities of the telescopic ball rods 320 of the two cross rods 310 are connected to the telescopic cavities of the telescopic rods 330. That is, when the length of the telescopic rods 330 increases, the length of the telescopic ball rods 320 decreases; when the length of the telescopic rods 330 decreases, the length of the telescopic ball rods 320 increases.

[0051] It should be noted that when the temperature of the outer molten salt is lower than that of the inner molten salt, the outer molten salt will mix with the inner molten salt to reduce the temperature of the inner molten salt. At this time, the temperature inside the telescopic gas rod 341 is reduced, and the telescopic gas rod 341 is pushed closer to each other by the two elastic members 350. Figure 6As shown, the two movable frames 340 are close to each other. Since the two cross rods 310 are respectively abutted against the two inner walls of the first mixing section 212, the positions of the two cross rods 310 do not change. The two movable frames 340 push one end of the telescopic rod 330 respectively, thereby shortening the telescopic rod 330, and the telescopic ball rod 320 extends to increase the unevenness of the surface of the first mixing section 212; when the temperature of the outer molten salt is higher than the temperature of the inner molten salt, the temperature of the internal molten salt is increased when the outer molten salt and the inner molten salt are mixed, so that the temperature of the gas inside the telescopic gas rod 341 increases, and the heat expands so that the telescopic gas rod 341 extends to overcome the force of the two elastic members 350, so that the two movable frames 340 move away from each other. At this time, the two movable frames 340 pull the telescopic rod 330 to extend, thereby shortening the telescopic ball rod 320 to reduce the deformation of the telescopic ball rod 320 on the side wall of the first mixing section 212.

[0052] In a further embodiment, a turbine 311 is coaxially and fixedly provided on one end of the two cross rods 310 away from each other. The turbine 311 is specifically located at the connection between the conveying section 211 and the first mixing section 212. The connection is provided with an annular groove, and the turbine 311 is located in the annular groove, thereby limiting the position of the two cross rods 310, but not limiting the rotation of the turbine 311. The turbine 311 is hollow inside and has blades. When the molten salt flows, it can drive the turbine 311 to rotate. The rotation of the turbine 311 then drives the cross rod 310 to rotate. When the cross rod 310 rotates, the telescopic ball rod 320 at the end of the cross rod 310 slides on the inner wall of the first mixing section 212 so that the side wall of the first mixing section 212 is continuously deformed to generate fluctuations, thereby enabling the molten salt passing through the surface of the first mixing section 212 to accelerate the turbulent velocity of the molten salt and further mix evenly.

[0053] In a further embodiment, the diversion assembly 200 also includes a rotating ring 360, which is sleeved on the outer periphery of the second mixing section 213. A through groove 361 is provided on the side wall of the rotating ring 360. The molten salt in the second mixing section 213 flows through the through hole 214 and enters the through groove 361, and enters the outer layer through the through groove 361. The rotating ring 360 can be driven to rotate by setting a driving assembly, so that the rotating ring 360 rotates and sprays out the molten salt inside, further improving the heat exchange efficiency at the second mixing section 213 and making the temperature more uniform.

[0054] Specifically, the rotating ring 360 can be rotated by the following structure, thereby avoiding the need to set up additional drive components. The outer periphery of the rotating ring 360 is provided with a special-shaped ring sleeve 370, the outer wall of the special-shaped ring sleeve 370 is fixedly arranged inside the input pipe 110, and the inner wall of the special-shaped ring sleeve 370 is provided with a plurality of inclined surfaces 371. Figure 8As shown, several inclined surfaces 371 are inclined in the same direction and are arranged in a circular array inside the special-shaped ring sleeve 370. The through groove 361 of the rotating ring 360 is also inclined, which is specifically achieved by an inclined connecting pipe. The opening of the through groove 361 is facing the inclined surface 371. When the through groove 361 of the rotating ring 360 sprays molten salt, the molten salt will be sprayed onto the inclined surface 371 of the special-shaped ring sleeve 370. Since the outer periphery of the special-shaped ring sleeve 370 is fixed in the input pipe 110, the special-shaped ring sleeve 370 is stationary, so the molten salt gives the rotating ring 360 a reaction force, thereby causing the rotating ring 360 to rotate, avoiding the use of additional drive components, thereby reducing energy consumption.

[0055] In a further embodiment, the heating component includes a heating copper wire 120, which is spirally wound on the outer wall of the input pipe 110. The heating copper wire 120 can heat the input pipe 110. The pitch of the heating copper wire 120 spirally wound at different positions on the input pipe 110 is different. Since the separator tube 210 in the input pipe 110 has a conveying section 211, a first mixing section 212 and a second mixing section 213, the temperature at each section is not exactly the same (when the heating copper wire 120 is not set, the temperature relationship should be that the temperature of the conveying section 211 is greater than the temperature of the first mixing section 212, and the temperature of the first mixing section 212 is greater than the temperature of the second mixing section 213), so the pitch of the heating copper wire 120 spirally wound on the input pipe 110 is adjusted. The pitch of the spiral distribution is that since the conveying section 211 of the separator tube 210 is closest to the input end of the molten salt, the temperature of the molten salt is higher when it just enters the input pipe 110. At this time, the pitch of the spiral of the heating copper wire 120 at this location can be increased a little; and the inner and outer layers of molten salt at the first mixing section 212 will mix for heat exchange, and the pitch of the heating copper wire 120 at this location can be reduced; and the degree of mixing of the inner and outer layers of molten salt at the second mixing section 213 is the greatest, that is, the heat exchange efficiency is the highest, and the diameter of the second mixing section 213 is small, and the inner layer of molten salt is too far away from the inner wall of the input pipe 110, so the pitch of the heating copper wire 120 at the second mixing section 213 can be further reduced, so that the heating temperature at this location is further increased, thereby preventing the condensation of the molten salt at the second mixing section 213.

[0056] In a further embodiment, two separator tubes 210 are provided in the input pipe 110, and the two separator tubes 210 are symmetrically arranged. The second mixing section 213 on the first separator tube 210 is connected to the second mixing section 213 on the second separator tube 210. When the molten salt flows in the input pipe 110, it passes through the conveying section 211 of the first separator tube 210, the first mixing section 212 of the first separator tube 210, the second mixing section 213 of the first separator tube 210, the second mixing section 213 of the second separator tube 210, the first mixing section 212 of the second separator tube 210 and the conveying section 211 of the second separator tube 210 in sequence, further increasing the number of mixing times (number of heat exchanges) of the inner and outer layers of the molten salt in the input pipe 110, so that the temperature distribution of the molten salt is more uniform.

[0057] It should be noted that the distribution of the heating copper wires 120 at the position of the second separation tube 210 is the same as the distribution of the heating copper wires 120 at the first separation tube 210 .

[0058] In a further embodiment, a conical connecting tube 400 is provided on one end of the two separating tubes 210 away from each other, the small end of the conical connecting tube 400 is fixed and coaxially connected to the pipe mouth of the separating tube 210, and the large end of the conical connecting tube 400 is fixedly connected to the inner wall of the input pipe 110, and a plurality of small holes 410 are provided on the conical surface of the conical connecting tube 400. The molten salt enters the inner and outer layers of the input pipe 110 respectively through the pipe mouth of the separating tube 210 and the plurality of small holes 410 on the conical surface. When the molten salt enters the conical connecting tube 400, a stirring wheel 420 is coaxially and rotatably provided inside the large end of the conical connecting tube 400. When the molten salt transported to the inside of the input pipe 110 passes through the stirring wheel 420, the stirring wheel 420 stirs the molten salt so that the molten salt is evenly mixed.

[0059] The stirring wheel 420 is also driven by the flowing molten salt, thereby further reducing energy consumption.

[0060] The specific working process of a static high-temperature molten salt tank provided by the present invention is described in combination with the above embodiments:

[0061] start up:

[0062] The heating copper wire 120 is energized to heat the input pipe 110, and the first delivery pump 111 is started. The first delivery pump 111 draws the molten salt that has released heat into the input pipe 110. The molten salt enters the input pipe 110 and flows through the inner cylinder of the conical connecting cylinder 400, and first flows through the stirring wheel 420. The stirring wheel 420 mixes the molten salt for the first time. The mixed molten salt passes through the opening of the separation tube 210 and the small hole 410 on the conical surface of the conical connecting cylinder 400 and enters the inner and outer layers of the input pipe 110 respectively. The molten salt flows through the first separation tube 210 in sequence. The conveying section 211 of the partition tube 210, the first mixing section 212 of the first partition tube 210, the second mixing section 213 of the first partition tube 210, the second mixing section 213 of the second partition tube 210, the first mixing section 212 of the second partition tube 210 and the conveying section 211 of the second partition tube 210, when the molten salt enters the first mixing section 212, due to the increase in the diameter of the first mixing section 212, the molten salt in the outer layer of the first mixing section 212 enters the inner layer of the first mixing section 212 through the through hole 214 and mixes with the molten salt in the inner layer.

[0063] If the temperature of the outer molten salt is lower than that of the inner molten salt, the telescopic gas rod 341 between the two movable frames 340 is shortened, and the elastic member 350 pushes the two movable frames 340 closer to each other, thereby pushing the telescopic rod 330 to shorten. The shortening of the telescopic rod 330 causes the telescopic ball rod 320 of the cross rod 310 to extend to press against the inner wall of the first mixing section 212, thereby increasing the surface roughness of the first mixing section 212 and increasing the turbulent velocity of the molten salt passing through the surface of the first mixing section 212, thereby improving the mixing degree of the molten salt. If the temperature of the outer molten salt is higher than that of the inner molten salt, the telescopic gas rod 341 between the two movable frames 340 is extended. The telescopic gas rod 341 pushes the two movable frames 340 away from each other, thereby pushing the telescopic rod 330 to extend. The extension of the telescopic rod 330 causes the telescopic ball rod 320 of the cross rod 310 to shorten, thereby reducing the surface roughness of the first mixing section 212 and reducing the turbulent velocity of the molten salt passing through the surface of the first mixing section 212.

[0064] At the same time, when the molten salt flows inside the separation tube 210 , the turbine 311 is driven to rotate, thereby driving the two cross rods 310 to rotate synchronously, thereby causing the side wall of the first mixing section 212 to fluctuate continuously.

[0065] When the molten salt flows through the second mixing section 213, due to the smaller diameter of the second mixing section 213, the molten salt in the inner layer of the second mixing section 213 enters the through groove 361 of the rotating ring 360 through the through hole 214. The molten salt is sprayed onto the inclined surface 371 in the special-shaped ring sleeve 370 through the through groove 361, thereby driving the rotating ring 360 to rotate, further improving the heat exchange efficiency of the molten salt in the second mixing section 213. At the same time, the pitch of the heating copper wire 120 there is the shortest, and the temperature there is higher. Coupled with the efficient mixing at the second mixing section 213, the temperature there is greatly increased, thereby preventing the molten salt from condensing during the transportation process.

[0066] The molten salt is input into the cold salt tank 100 through the input pipe 110 for storage. If the molten salt in the cold salt tank 100 needs to be recycled, the second delivery pump 131 is started. The second delivery pump 131 extracts the molten salt in the cold salt tank 100 and outputs it to the heat collecting pipe (not shown in the figure) through the output pipe 130 for heating and heat storage. After the molten salt has released heat, it flows back to the cold salt tank 100 through the input pipe 110, forming a complete energy circulation system.

[0067] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A static high-temperature molten salt tank, characterized in that: include: A cold salt tank, wherein the cold salt tank is provided with an input pipeline, and the input pipeline can transport molten salt; a heating assembly capable of heating the input pipe; A flow splitting component, wherein the flow splitting component comprises a separator tube, which is arranged in the input pipe, and the separator tube separates the molten salt entering the input pipe into an inner layer and an outer layer, and the separator tube is sequentially divided into a conveying section, a first mixing section and a second mixing section along a conveying direction, wherein the diameter of the conveying section is smaller than the diameter of the first mixing section, the diameter of the first mixing section is larger than the diameter of the second mixing section, and through holes are provided on the first mixing section and the second mixing section; A concave-convex component, wherein the concave-convex component can change the flatness of the surface of the first mixing section of the partition tube, and the flatness of the surface of the first mixing section of the partition tube is negatively correlated with the temperature of the molten salt in the first mixing section; The concave-convex assembly includes two cross rods, and the cross ends of the two cross rods are each provided with a telescopic ball rod, the telescopic ball rod abuts against the inner arm of the first mixing section of the separation tube, the side wall of the first mixing section is elastic, and when the temperature of the outer layer of the separation tube changes, the length of the telescopic ball rod changes, and the telescopic ball rod presses the side wall of the first mixing section to make its surface convex; Two sliding and plug-in movable frames are arranged between the two cross rods, and elastic members are respectively arranged at two ends of the two movable frames that are far away from each other, and the two elastic members abut against the axes of the two cross rods. A telescopic gas rod is arranged between the two movable frames, and telescopic rods are respectively arranged on the ends of the two movable frames that are close to each other. The telescopic rods pass through the movable frames and are respectively connected to the cross rods, and the telescopic chambers of the telescopic rods are connected to the telescopic chamber of the telescopic ball rod, and the length of the telescopic gas rod is positively correlated with the temperature inside the first mixing section.

2. The static high-temperature molten salt tank according to claim 1, characterized in that: The elastic member is a compression spring.

3. The static high-temperature molten salt tank according to claim 1, characterized in that: A turbine is coaxially and fixedly arranged on one end of the two cross rods away from each other. When the molten salt passes through the turbine, the turbine is driven to rotate, and the turbine drives the two cross rods to rotate so that the side wall of the first mixing section fluctuates continuously.

4. The static high-temperature molten salt tank according to claim 1, characterized in that: The diversion component also includes a rotating ring, which is sleeved on the outer circumference of the second mixing section. The rotating ring is provided with a through groove, and the molten salt in the second mixing section is discharged through the through groove. The rotating ring rotates to spray out the second mixing section to mix the inner molten salt with the outer molten salt.

5. The static high-temperature molten salt tank according to claim 4, characterized in that: A special-shaped ring sleeve is provided on the outer side of the rotating ring, and a plurality of inclined surfaces are provided on the inner wall of the special-shaped ring sleeve. The outer periphery of the special-shaped ring sleeve is fixed on the inner wall of the input pipe, and the molten salt sprayed from the rotating ring groove is sprayed toward the inclined surface to drive the rotating ring to rotate.

6. The static high-temperature molten salt tank according to claim 1, characterized in that: The heating component includes a heating copper wire, which is spirally wound on the outer wall of the input pipe. The pitch of the heating copper wire at the conveying section of the separator pipe is greater than the pitch of the heating copper wire at the first mixing section, and the pitch of the heating copper wire at the first mixing section is greater than the pitch of the heating copper wire at the second mixing section.

7. The static high-temperature molten salt tank according to claim 1, characterized in that: Two partition tubes are arranged in the input pipeline, and the partition tubes are symmetrically arranged.

8. The static high-temperature molten salt tank according to claim 7, characterized in that: A conical connecting tube is arranged on one end of the two separating tubes away from each other, the small end of the conical connecting tube is fixedly connected to the separating tube, the large end of the conical connecting tube is fixedly connected to the inner wall of the input pipe, and a rotating stirring wheel is rotatably arranged on the inner wall of the large end of the conical connecting tube, a plurality of small holes are opened on the conical surface of the conical connecting tube, and the molten salt enters the inner and outer layers of the input pipe respectively through the small end and the plurality of small holes of the conical connecting tube after being stirred by the stirring wheel.

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