Fused salt heat storage and heat exchange device capable of stirring

Abstract

The utility model relates to the technical field of fused salt heat storage and heat exchange, and provides a stirring fused salt heat storage and heat exchange device which comprises a tank body, a heat exchange pipeline is arranged on the tank wall of the tank body, and the tank body is suitable for being filled with a fused salt heat storage material; the heating device is inserted into the fused salt heat storage material in the tank body in the vertical direction and is used for heating the fused salt heat storage material; the stirring shaft is rotatably inserted into the fused salt heat storage material from the tank top of the tank body in the vertical direction, the part, located in the tank body, of the stirring shaft is provided with a stirring support, and the upper end of the stirring shaft is exposed out of the tank body; the driving assembly is pivotally connected to the upper end of the stirring shaft and is used for driving the stirring shaft to rotate; the cooling water tank is provided with a water inlet and a water outlet, the driving assembly is at least partially arranged in the cooling water tank, and the cooling water tank is used for cooling the driving assembly. On one hand, the driving assembly can be cooled, the damage risk of the driving assembly is reduced, and on the other hand, heat lost from the driving assembly can be utilized.

Description

TECHNICAL FIELD

[0001] The application relates to a molten salt heat storage and release device. BACKGROUND

[0002] At present, there is a molten salt heat storage and release device, which comprises a molten salt tank, an electric heating unit and a heat exchange pipeline, the molten salt tank is filled with molten salt, the electric heating unit is inserted into the molten salt in the tank from the top of the molten salt tank, the electric heating unit is used for heating the molten salt, and the heat exchange pipeline comprises an inlet close to the bottom of the molten salt tank and an outlet close to the top of the molten salt tank.

[0003] When the molten salt heat storage and release device stores heat, the electric heating unit heats the molten salt to be molten, the density of the molten salt decreases with the increase of the temperature, the higher the temperature of the molten salt, the larger the volume and the smaller the density. With the continuation of the heating process, the molten salt with a higher temperature and a smaller density will rise, and the molten salt with a lower temperature and a larger density will sink, and when the upper molten salt is heated to the highest use temperature, the electric heating unit stops working, but at this time, the lower molten salt in the tank still has a lower temperature, the temperature distribution of the molten salt in the tank is high at the top and low at the bottom, and the heat storage capacity of the lower molten salt in the tank is not fully utilized, resulting in cost waste.

[0004] When the molten salt heat storage and release device releases heat, the water enters from the bottom and exits from the top, the heat exchange pipeline comprises a preheating section, a boiling section and a superheating section from bottom to top, and the heat transfer coefficient, the heat transfer temperature difference and the heat transfer amount of the preheating section and the boiling section are significantly higher than those of the superheating section, so that the temperature of the lower molten salt in the molten salt tank decreases faster than that of the upper molten salt, which also causes the temperature distribution of the molten salt in the tank to be high at the top and low at the bottom, resulting in that the heat release capacity of the upper molten salt in the tank is not fully utilized.

[0005] In view of the above situation, a stirring device is usually arranged to stir and mix the molten salt in the tank body, so as to improve the utilization rate of the heat storage capacity and the heat release capacity of the molten salt. However, the stirring device needs to use a driving assembly, and the driving assembly is affected by the heat generated by its own work and the heat transfer of the molten salt, on the one hand, the driving assembly is prone to damage, and on the other hand, the driving assembly is exposed to the air, which causes a large amount of heat loss and reduces the overall efficiency of the system. CONTENT OF THE INVENTION

[0006] The application provides a stirrable molten salt heat storage and heat exchange device, which is ingenious in design and simple in structure. The cooling water tank is arranged, cooling water flowing in the cooling water tank is used for cooling at least part of the driving assembly, for example, cooling the driving motor or the transmission component. On one hand, the influence of heat generation of the driving assembly itself and heat transfer of the molten salt on the driving assembly is reduced, and the risk of overheat damage or overheat shutdown of the driving assembly is reduced. On the other hand, the cooling water is preheated after passing through the cooling water tank, can be stored in the heat preservation tank for further use, or can be introduced into the heat exchange pipeline of the molten salt heat storage and heat exchange device, so that the heat loss is reduced. The stirring support is arranged, which can improve the stirring and mixing effect of the molten salt, improve the consistency of the molten salt temperature in the height direction and the consistency of the molten salt temperature in the radial direction of the tank body, and then improve the utilization rate of the heat storage capacity and the heat release capacity of the molten salt. On the other hand, the stirring support can play a role in heat transfer, and can balance the temperature of the molten salt in the tank body, so as to further ensure the consistency of the molten salt temperature in the height direction and the consistency of the molten salt temperature in the radial direction of the tank body. In addition, the stirring shaft is inserted into the tank body from the tank top, which avoids opening a hole in the bottom of the tank body, reduces the risk of leakage of the tank body, and the driving assembly is arranged on the tank top, so that the stress distribution form of the bottom of the tank body is not changed (the bottom of the tank body is placed on the bearing base), the bottom of the tank body is still uniformly stressed, and the tank body is relatively easy to reform. The technical scheme adopted by the application is as follows:

[0007] A stirrable molten salt heat storage and heat exchange device comprises:

[0008] A tank body is provided with a heat exchange pipeline on the tank wall, and the tank body is suitable for filling molten salt heat storage material; a heating device is inserted into the molten salt heat storage material in the tank body in the vertical direction, and the heating device is used for heating the molten salt heat storage material; a stirring shaft is rotatably inserted into the molten salt heat storage material in the vertical direction from the tank top of the tank body, and the part of the stirring shaft located in the tank body is provided with a stirring support, and the upper end of the stirring shaft is exposed to the tank body; a driving assembly is pivotally connected to the upper end of the stirring shaft and used for driving the rotation of the stirring shaft, so that the stirring support stirs the molten salt heat storage material; and a cooling water tank is provided with a water inlet and a water outlet, and at least part of the driving assembly is arranged in the cooling water tank, so that the driving assembly is cooled.

[0009] By setting the cooling water tank, the cooling water flowing in the cooling water tank is used to cool at least part of the driving assembly, for example, to cool the driving motor or to cool the transmission part. On the one hand, the influence of the driving assembly due to its own working heat and the heat transfer of molten salt on the driving assembly can be reduced, and the risk of overheating damage or overheating shutdown of the driving assembly can be reduced. On the other hand, the cooling water is preheated after passing through the cooling water tank and can be stored in the heat preservation water tank for further use, or can be introduced into the heat exchange pipeline of the molten salt heat storage and heat exchange device, thereby reducing heat loss. The present application sets the stirring support, which can improve the stirring and mixing effect of the molten salt, improve the consistency of the molten salt temperature in the height direction and the consistency in the radial direction of the tank body, thereby improving the utilization rate of the molten salt heat storage capacity and heat release capacity, and the stirring support can also play a role in heat transfer, which can balance the temperature of the molten salt in the tank body, and further ensure the consistency of the molten salt temperature in the height direction and the consistency in the radial direction of the tank body. In addition, the stirring shaft is inserted into the tank body from the tank top, which avoids opening a hole in the bottom of the tank body and reduces the risk of leakage of the tank body. In addition, the driving assembly is arranged on the tank top, which does not change the original stress distribution form of the bottom of the tank body (the bottom of the tank body is placed on the bearing base surface), the bottom of the tank body is still uniformly stressed, and the tank body is relatively easy to reform.

[0010] In some embodiments, the driving assembly includes a driving motor, and an outer shell of the driving motor is circumferentially surrounded by an outer wall of the cooling water tank, and a flow space of cooling water is formed between the outer wall of the cooling water tank and the outer shell of the driving motor.

[0011] By circumferentially surrounding the outer shell of the driving motor with the outer wall of the cooling water tank, a flow space of cooling water is formed between the outer wall of the cooling water tank and the outer shell of the driving motor, and the cooling water flowing in the flow space is used to cool the driving motor. On the one hand, the influence of the driving motor due to its own working heat and the heat transfer of molten salt on the driving motor can be reduced, and the risk of overheating damage or overheating shutdown of the driving motor can be reduced. On the other hand, the cooling water is preheated after passing through the flow space and can be stored in the heat preservation water tank for further use, or can be introduced into the heat exchange pipeline of the molten salt heat storage and heat exchange device, thereby reducing heat loss.

[0012] In some embodiments, a baffle plate is arranged between the outer wall of the cooling water tank and the outer shell of the driving motor to prolong the flow path of the cooling water.

[0013] By arranging a baffle plate between the outer wall of the cooling water tank and the outer shell of the driving motor, that is, by arranging a baffle plate in the flow space of the cooling water, the flow path of the cooling water in the flow space is prolonged, the heat exchange efficiency between the cooling water and the outer shell of the driving motor is improved, the cooling effect of the driving motor is enhanced, and the effect of reducing heat loss is also improved.

[0014] In some embodiments, the plurality of baffles are arranged in parallel to the axis of the driving motor, and are arranged in a ring shape around the axis of the driving motor.

[0015] In some embodiments, the plurality of baffles are arranged in parallel to the axis of the driving motor, and are arranged in a ring shape around the axis of the driving motor.

[0016] In some embodiments, the driving assembly further comprises a magnetic coupling, and the stirring shaft is connected to the driving motor through the magnetic coupling.

[0017] By arranging the magnetic coupling, a soft connection (magnetic connection) is formed between the stirring shaft and the driving motor, which can also be referred to as a non-contact connection. In this way, the heat of the molten salt transferred to the stirring shaft cannot be conducted to the driving motor, further reducing the risk of overheating damage to the driving motor.

[0018] In some embodiments, the stirring support comprises at least two groups of parallelly arranged connecting rods, and the stirring support has a symmetric axis which is arranged in line with the stirring shaft.

[0019] By arranging the stirring support with the frame, in addition to improving the stirring and mixing effect of the molten salt, improving the consistency of the molten salt temperature in the height direction and the radial direction of the tank, and further improving the utilization rate of the heat storage and heat release capacity of the molten salt, the frame can also play a role in heat conduction along the radial direction of the tank, enhancing the heat transfer between the core layer of molten salt and the outer layer of molten salt (molten salt close to the tank wall), further improving the consistency of the molten salt temperature in the radial direction of the tank. At the same time, the frame can also play a role in heat conduction along the height direction of the tank, enhancing the heat transfer between the molten salt at different heights in the tank, further improving the consistency of the molten salt temperature in the height direction of the tank.

[0020] In some embodiments, the stirring support further comprises a stirring impeller, and the stirring impeller is rotatably mounted on the vertically arranged connecting rod.

[0021] By arranging the rotatable stirring impeller on the vertically arranged connecting rod of the stirring support, when the stirring support rotates with the stirring shaft, the stirring impeller also rotates around the connecting rod. In this way, on the one hand, the stirring influence range of the stirring support is enhanced, and on the other hand, the stirring and mixing effect of the molten salt is improved, which is beneficial to further improve the consistency of the molten salt temperature in the tank.

[0022] In some embodiments, the stirring support further comprises a first spiral blade, which is rotatably mounted on the vertically arranged connecting rod.

[0023] By arranging the rotatable first spiral blade on the vertically arranged connecting rod of the stirring support, when the stirring support follows the rotation of the stirring shaft, the first spiral blade also rotates around the connecting rod, which not only enhances the stirring range of the stirring support and improves the stirring and mixing effect of the molten salt, but also plays a role in heat conduction, which is conducive to improving the consistency of the molten salt temperature in the height direction of the tank and the consistency in the radial direction of the tank.

[0024] In some embodiments, the molten salt heat storage and heat exchange device further comprises a second spiral blade, which is fixed to the part of the stirring shaft located in the tank.

[0025] By arranging the second spiral blade on the stirring shaft, the second spiral blade rotates synchronously with the stirring shaft, and when the stirring shaft rotates, the second spiral blade can directly stir the core layer molten salt, improving the mixing effect of the core layer molten salt and the outer layer molten salt (molten salt close to the tank wall), and at the same time, the second spiral blade can also play a role in heat conduction.

[0026] The application provides a molten salt heat storage and heat exchange device that can be stirred, which has at least one of the following beneficial effects:

[0027] 1、The molten salt heat storage and heat exchange device provided by the application can reduce the influence of the heat generated by the driving assembly itself and the heat transfer of the molten salt on the driving assembly, reduce the risk of overheating damage or overheating shutdown of the driving assembly, and the cooling water can be preheated after passing through the cooling water tank and stored in the heat preservation tank for further use or introduced into the heat exchange pipeline of the molten salt heat storage and heat exchange device, thereby reducing heat loss.

[0028] 2. The molten salt heat storage and heat exchange device provided by the application can stir the molten salt. The outer wall of the cooling water tank is circumferentially surrounded outside the shell of the driving motor, a cooling water flow space is formed between the outer wall of the cooling water tank and the shell of the driving motor, and the driving motor is cooled by the cooling water flowing in the flow space. On the one hand, the influence of the heat generated by the driving motor itself and the heat transfer of the molten salt on the driving motor is reduced, and the risk of overheating damage or overheating shutdown of the driving motor is reduced. On the other hand, the cooling water is preheated after passing through the flow space, can be stored in the heat preservation water tank for further use, or can be introduced into the heat exchange pipeline of the molten salt heat storage and heat exchange device, thereby reducing heat loss.

[0029] 3. The molten salt heat storage and heat exchange device provided by the application can stir the molten salt. The baffle is arranged between the outer wall of the cooling water tank and the shell of the driving motor, that is, the baffle is arranged in the cooling water flow space, the flow path of the cooling water in the flow space is prolonged, the heat exchange efficiency between the cooling water and the shell of the driving motor is improved, the cooling effect of the driving motor is enhanced, and the effect of reducing heat loss is improved.

[0030] 4. The molten salt heat storage and heat exchange device provided by the application can stir the molten salt. The magnetic coupling is arranged, and a soft connection (magnetic connection) is formed between the stirring shaft and the driving motor, which can also be referred to as a non-contact connection. In this way, the heat transferred from the molten salt to the stirring shaft cannot be conducted to the driving motor, and the risk of overheating damage of the driving motor is further reduced.

[0031] 5. The molten salt heat storage and heat exchange device provided by the application can stir the molten salt. The stirring support with the frame is arranged. In addition to improving the stirring and mixing effect of the molten salt, improving the consistency of the molten salt temperature in the height direction and the radial direction of the tank body, and further improving the utilization rate of the heat storage capacity and the heat release capacity of the molten salt, the frame can also play a role in heat conduction along the radial direction of the tank body, enhancing the heat transfer between the core layer molten salt and the outer layer molten salt (molten salt close to the tank wall), further improving the consistency of the molten salt temperature in the radial direction of the tank body. At the same time, the frame can also play a role in heat conduction along the height direction of the tank body, enhancing the heat transfer between the molten salts at different heights in the tank body, and further improving the consistency of the molten salt temperature in the height direction of the tank body.

[0032] 6. The molten salt heat storage and heat exchange device provided by the application can stir the molten salt. The rotatable stirring impeller is arranged on the connecting rod arranged vertically on the stirring support. When the stirring support rotates with the stirring shaft, the stirring impeller also rotates around the connecting rod. In this way, the stirring influence range of the stirring support is enhanced, and the stirring and mixing effect of the molten salt is improved, which is conducive to further improving the consistency of the molten salt temperature in the tank body.

[0033] 7. The application provides a stirrable molten salt heat storage and heat exchange device, a rotatable first spiral blade is arranged on the connecting rod arranged vertically on the stirring support, when the stirring support rotates following the stirring shaft, the first spiral blade also rotates around the connecting rod, which not only enhances the stirring influence range of the stirring support and improves the stirring and mixing effect of the molten salt, the first spiral blade also plays a role in heat conduction, which is beneficial to improving the consistency of the molten salt temperature in the tank body along the height direction of the tank body and along the radial direction of the tank body.

[0034] 8. The application provides a stirrable molten salt heat storage and heat exchange device, a second spiral blade is arranged on the stirring shaft, the second spiral blade rotates synchronously with the stirring shaft, when the stirring shaft rotates, the second spiral blade can directly stir the core layer molten salt, which improves the mixing effect of the core layer molten salt and the outer layer molten salt (molten salt close to the tank wall), and the second spiral blade also plays a role in heat conduction. BRIEF DESCRIPTION OF DRAWINGS

[0035] The above-mentioned characteristics, technical features, advantages and implementation modes of the stirrable molten salt heat storage and heat exchange device will be further described in a clear and understandable manner in combination with the preferred embodiments and the accompanying drawings:

[0036] Figure 1 is a structural schematic diagram of an embodiment of the molten salt heat storage and heat exchange device of the application;

[0037] Figure 2 is a schematic diagram of one setting form of the baffle between the driving motor shell and the outer wall of the water tank;

[0038] Figure 3 is a schematic diagram of another setting form of the baffle between the driving motor shell and the outer wall of the water tank;

[0039] Figure 4 is a structural schematic diagram of another embodiment of the molten salt heat storage and heat exchange device of the application;

[0040] Figure 5 is a structural schematic diagram of still another embodiment of the molten salt heat storage and heat exchange device of the application;

[0041] Figure 6 is a structural schematic diagram of an embodiment of the molten salt heat storage and heat exchange device of the application provided with a first spiral blade;

[0042] Figure 7 is a structural schematic diagram of an embodiment of the molten salt heat storage and heat exchange device of the application provided with a second spiral blade.

[0043] BRIEF DESCRIPTION OF DRAWINGS

[0044] Tank body 1, stirring shaft 2, stirring support 3, cooling water tank 4, water inlet 5, water outlet 6, driving motor 7, shell 8, baffle 9, notch 10, horizontal rod 11, vertical rod 12, stirring impeller 13, first helical blade 14, second helical blade 15. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0046] In order to make the drawing simple, only the parts related to the present application are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0047] It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0048] In this paper, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0050] Reference Figure 1 , Figures 4-7The application provides a stirrable molten salt heat storage and heat exchange device, which comprises a tank body 1, a heat exchange pipeline (not shown in the figure) is arranged on the tank wall of the tank body 1, and the tank body 1 is suitable for filling molten salt heat storage materials; a heating device (not shown in the figure) is inserted into the molten salt heat storage materials in the tank body 1 in the vertical direction, and the heating device is used for heating the molten salt heat storage materials; a stirring shaft 2 is rotatably inserted into the molten salt heat storage materials in the vertical direction from the tank top of the tank body 1, a stirring support 3 is arranged on the part of the stirring shaft 2 in the tank body 1, and the upper end of the stirring shaft 2 is exposed to the tank body 1; a driving assembly is pivotally connected to the upper end of the stirring shaft 2 and used for driving the rotation of the stirring shaft 2, so that the stirring support 3 stirs the molten salt heat storage materials; and a cooling water tank 4 is provided with a water inlet 5 and a water outlet 6, and at least part of the driving assembly is arranged in the cooling water tank 4, and the cooling water tank 4 is used for cooling the driving assembly.

[0051] Specifically, the driving assembly comprises a driving motor 7 and a transmission assembly (transmission component), the cooling water tank 4 can be in the form of surrounding the shell 8 of the driving motor 7 or in the form of surrounding the transmission assembly, for example, transmission gears belonging to the transmission assembly are arranged in the cooling water tank 4, or a shaft coupling and a transmission shaft belonging to the transmission assembly are arranged in the cooling water tank 4. It can be understood that no matter which form of the cooling water tank 4 is used, at least part of the driving assembly is cooled by the cooling water circulating in the cooling water tank 4, which can reduce the influence of the heat generated by the driving assembly itself and the heat transfer of the molten salt on the driving assembly, reduce the risk of overheating damage or overheating shutdown of the driving assembly, and preheat the cooling water after the cooling water tank 4, which can be stored in a heat preservation water tank for further use or be introduced into the heat exchange pipeline of the molten salt heat storage and heat exchange device, thereby reducing the heat loss. In the embodiment, the stirring support 3 is arranged, which can improve the stirring and mixing effect of the molten salt, improve the consistency of the molten salt temperature in the height direction and the consistency of the molten salt temperature in the radial direction of the tank body 1, and further improve the utilization rate of the molten salt heat storage capacity and the heat release capacity. In addition, the stirring shaft 2 is inserted into the tank body 1 from the tank top, which avoids opening a hole in the bottom of the tank body 1 and reduces the risk of leakage of the tank body 1. In addition, the driving assembly is arranged on the tank top, which does not change the original stress distribution form of the bottom of the tank body 1 (the bottom of the tank body 1 is placed on a bearing base), the bottom of the tank body 1 is still uniformly stressed, and the traditional tank body 1 can be easily transformed into the molten salt heat storage and heat exchange device protected by the application through the form of transformation and upgrading.

[0052] Reference Figure 1 , Figures 3-7In one embodiment, the driving assembly comprises a driving motor 7, and the outer wall of the cooling water tank 4 is annularly surrounded by the shell 8 of the driving motor 7, and a cooling water flow space is formed between the outer wall of the cooling water tank 4 and the shell 8 of the driving motor 7.

[0053] It can be easily understood that, by annularly surrounding the outer wall of the cooling water tank 4 outside the shell 8 of the driving motor 7, and forming a cooling water flow space between the outer wall of the cooling water tank 4 and the shell 8 of the driving motor 7, the driving motor 7 is cooled by the cooling water flowing in the flow space, which can reduce the influence of the heat generated by the driving motor 7 itself and the heat transfer of the molten salt on the driving motor 7, and reduce the risk of overheating damage or overheating shutdown of the driving motor 7, and the cooling water is preheated after passing through the flow space, which can be stored in the heat preservation water tank for further use, or can be introduced into the heat exchange pipeline of the molten salt heat storage and heat exchange device, thereby reducing heat loss.

[0054] Reference Figure 2 , Figure 3 In one embodiment, baffles 9 are arranged between the outer wall of the cooling water tank 4 and the shell 8 of the driving motor 7 to prolong the flow path of the cooling water.

[0055] It is worth noting that, by arranging the baffles 9 between the outer wall of the cooling water tank 4 and the shell 8 of the driving motor 7, that is, by arranging the baffles 9 in the cooling water flow space, the flow path of the cooling water in the flow space is prolonged, the heat exchange efficiency between the cooling water and the shell 8 of the driving motor 7 is improved, the cooling effect of the driving motor 7 is enhanced, and the effect of reducing heat loss is also improved.

[0056] Reference Figure 2 In one specific embodiment, the baffles 9 are multiple, the length direction of the baffles 9 is parallel to the axis of the driving motor 7, the multiple baffles 9 are annularly and spacedly arranged around the axis of the driving motor 7, and two adjacent baffles 9 are arranged in a staggered manner in the direction parallel to the axis of the driving motor 7.

[0057] Reference Figure 3 In another specific embodiment, the baffles 9 are multiple, the baffles 9 are in the shape of a circular ring with notches 10, the multiple baffles 9 are spacedly arranged along the axis direction of the driving motor 7 and perpendicular to the axis of the driving motor 7, and the notches 10 of the two adjacent baffles 9 are respectively located on the opposite sides in the radial direction of the shell 8 of the driving motor 7.

[0058] It can be understood that, in other embodiments, the baffles 9 can also have other shapes, for example, the baffles 9 are in the shape of a spiral, and the spiral baffles 9 are arranged around the shell 8 of the driving motor 7.

[0059] In one embodiment, the drive assembly further includes a magnetic coupling, through which the stirring shaft 2 and the drive motor 7 are driven.

[0060] It is worth noting that by setting a magnetic coupling, a soft connection (magnetic connection) is formed between the stirring shaft 2 and the drive motor 7, which can also be called a non-contact connection. This prevents the heat transferred from the molten salt to the stirring shaft 2 from being conducted to the drive motor 7, further reducing the risk of the drive motor 7 overheating and being damaged.

[0061] refer to Figure 1 , Figures 4-7 In one embodiment, the stirring support includes a frame with an axis of symmetry constructed from at least two sets of parallel connecting rods, the axis of symmetry being collinear with the stirring axis.

[0062] Specifically, the stirring support can have various structural forms, for example, the stirring support can be... Figure 4 The form shown, Figure 4 Each set of parallel connecting rods is inclined relative to the stirring shaft, or it can be... Figure 1 , Figures 5-7 The form shown, Figure 1 , Figures 5-7 The stirring support 3 includes at least two horizontal bars 11 (a first set of parallel connecting rods) and at least two vertical bars 12 (a second set of parallel connecting rods). The horizontal bars 11 are perpendicular to the stirring shaft 2, and the vertical bars 12 are parallel to the stirring shaft 2. The horizontal bars 11 and the vertical bars 12 are connected to form a rectangular stirring support 3.

[0063] In this embodiment, by setting up a stirring support 3 including a horizontal bar 11 and a vertical bar 12, in addition to improving the stirring and mixing effect of molten salt, improving the uniformity of molten salt temperature in the height direction and the radial direction of the tank 1, and thus improving the utilization rate of the molten salt's heat storage and heat release capacity, the horizontal bar 11 can play a role in conducting heat along the radial direction of the tank 1, enhancing the heat transfer between the core layer molten salt and the outer layer molten salt (molten salt near the tank wall), further improving the uniformity of molten salt temperature in the radial direction of the tank 1. The vertical bar 12 can play a role in conducting heat along the height direction of the tank 1, enhancing the heat transfer between molten salts at different heights in the tank 1, further improving the uniformity of molten salt temperature in the height direction of the tank 1.

[0064] Understandable, Figure 1 , Figures 5-7 The stirring support 3 shown is more suitable for cylindrical tanks 1. In other embodiments, see reference... Figure 4 , Figure 4 The type of stirring bracket 3 shown is more suitable for spherical tanks 1.

[0065] refer to Figure 5In one embodiment, the stirring support 3 further comprises a stirring vane 13 rotatably mounted on the vertically arranged vertical rod 12 (link). By arranging the rotatable stirring vane 13 on the vertically arranged vertical rod 12 (link) of the stirring support 3, when the stirring support 3 follows the rotation of the stirring shaft 2, the stirring vane 13 also rotates around the vertical rod 12, thus on one hand, the stirring influence range of the stirring support 3 is enhanced, and on the other hand, the stirring and mixing effect on the molten salt is improved, which is beneficial to further improve the consistency of the molten salt temperature in the tank 1.

[0066] Reference Figure 6 In one embodiment, the stirring support 3 further comprises a first helical blade 14 rotatably mounted on the vertically arranged vertical rod 12 (link). By arranging the rotatable first helical blade 14 on the vertically arranged vertical rod 12 (link) of the stirring support 3, when the stirring support 3 follows the rotation of the stirring shaft 2, the first helical blade 14 also rotates around the vertical rod 12, which not only enhances the stirring influence range of the stirring support 3 and improves the stirring and mixing effect on the molten salt, but also plays a role in heat conduction, which is beneficial to improve the consistency of the molten salt temperature along the height direction of the tank 1 and along the radial direction of the tank 1.

[0067] Reference Figure 7 In one embodiment, in the stirring support 3, Figure 6 On the basis of the embodiment, a second helical blade 15 is further included, and the second helical blade 15 is fixed to the part of the stirring shaft 2 located in the tank 1. By arranging the second helical blade 15 on the stirring shaft 2, the second helical blade 15 rotates synchronously with the stirring shaft 2, and when the stirring shaft 2 rotates, the second helical blade 15 can directly stir the core layer molten salt, which improves the mixing effect of the core layer molten salt and the outer layer molten salt (molten salt close to the tank wall), and at the same time, the second helical blade 15 also plays a role in heat conduction. It can be understood that in other embodiments, only the second helical blade 15 can be arranged, and the first helical blade 14 is not arranged. In another embodiment, the second helical blade 15 and the stirring vane 13 can be arranged at the same time.

[0068] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present application, and it should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A stirrable molten salt heat storage and heat exchange device, characterized by, The application relates to a molten salt heat storage device. The device comprises a tank body, a heating device, a stirring shaft and a driving assembly. The tank body is provided with heat exchange pipes on a tank wall, and is suitable for filling molten salt heat storage materials. The heating device is inserted into the molten salt heat storage materials in the tank body in a vertical direction, and is used for heating the molten salt heat storage materials. The stirring shaft is rotatably inserted into the molten salt heat storage materials in a vertical direction from a tank top of the tank body, and a part of the stirring shaft in the tank body is provided with a stirring support. The driving assembly is pivotally connected to an upper end of the stirring shaft, and is used for driving rotation of the stirring shaft so that the stirring support stirs the molten salt heat storage materials.

2. The stirrable molten salt heat storage and heat exchange device according to claim 1, characterized in that The driving assembly comprises a driving motor, and an outer shell of the driving motor is circumferentially surrounded by an outer wall of the cooling water tank.

3. The stirrable molten salt heat storage and heat exchange device according to claim 2, characterized in that The outer wall of the cooling water tank and the outer shell of the driving motor form a flowing space of cooling water.

4. The stirrable molten salt heat storage and heat exchange device according to claim 3, characterized in that The outer wall of the cooling water tank and the outer shell of the driving motor are provided with baffles to prolong the flowing path of the cooling water.

5. The stirrable molten salt heat storage and heat exchange device according to claim 3, characterized in that, The baffles are parallel to the axis of the driving motor in the length direction, and are circumferentially and spacedly arranged around the axis of the driving motor.

6. The stirrable molten salt heat storage and heat exchange device according to claim 2, characterized in that, The baffles are circular rings with notches, and are vertically arranged along the axis of the driving motor.

7. The stirrable molten salt heat storage and heat exchange device according to claim 1, characterized in that, The driving assembly further comprises a magnetic coupling.

8. The stirrable molten salt heat storage and heat exchange device according to claim 7, characterized in that The stirring support comprises at least two groups of frames with symmetric axes which are constructed by parallelly arranged connecting rods.

9. The stirrable molten salt thermal energy storage and heat exchange device of claim 7, wherein, The stirring support further comprises stirring impellers and first spiral blades.

10. The stirrable molten salt heat storage and heat exchange device according to claim 9, characterized in that The stirring support further comprises second spiral blades which are fixedly installed on the stirring shaft.

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