Device for inhibiting molten salt stratification in molten salt tank

Abstract

The embodiment of the invention provides a device for inhibiting a molten salt stratification in a molten salt tank. The device comprises an electric rotary vane assembly, a drainage structure and a plurality of flow guide channels. The first end of the electric rotary vane assembly is used for providing driving force, and the second end of the electric rotary vane assembly is used for forcibly stirring fused salt in the fused salt tank to form a disturbance flow field. The drainage structure is arranged at the bottom of the molten salt tank and used for expanding the action range of the disturbance flow field at the bottom of the molten salt tank and guiding molten salt to flow towards the bottom and the side wall of the molten salt tank. The flow guide channel is arranged on the side wall of the molten salt tank and used for enabling the molten salt to form a vertical backflow path along the side wall of the molten salt tank under the action of the disturbance flow field. The device for restraining the molten salt stratification in the molten salt tank can serve as a supplement or standby means of an existing pump circulation system, quick intervention is achieved when temperature difference sudden increase occurs in the tank bottom and the side wall cold area, local temperature homogenization is achieved through physical stirring and drainage, and therefore the safety and stability of overall operation of the molten salt tank are improved.

Description

Technical Field

[0001] The embodiments disclosed herein belong to the field of molten salt storage tank technology, specifically relating to a device for suppressing molten salt stratification within a molten salt tank. Background Technology

[0002] Molten salt thermal energy storage systems are widely used in solar thermal power generation, industrial waste heat utilization, and flexibility enhancement of coal-fired power units. During operation, maintaining the uniformity of the molten salt temperature field within the tank is crucial to avoid problems such as thermal stress, decreased thermal storage efficiency, and damage to the tank bottom structure. Currently, pump-based circulation is commonly used in engineering projects. This involves extracting molten salt from the tank and redistributing it to achieve fluid disturbance and mitigate temperature stratification. However, relying solely on pump circulation has limitations: during the tank preheating stage, or in extreme weather conditions such as heavy rainfall or low-temperature shocks, rapid heat exchange occurs at the tank bottom or wall area, causing localized molten salt to cool rapidly, creating density differences and exacerbating temperature stratification. In such situations, the pump circulation response is lag-dependent, and the flow path is limited, making it impossible to effectively eliminate localized cold salt accumulation in a short time.

[0003] Furthermore, the pump circulation system relies on pipeline layout and pump unit operating status, resulting in a relatively fixed working mode. When a sudden cold spot or temperature change occurs in the storage tank, it is difficult to achieve rapid local agitation and bottom disturbance, leading to a slow temperature recovery rate. There is a lack of a physical stirring device that can operate independently outside the pump circulation system, is quick to take effect, and has a simple structure, to enhance the molten salt mixing effect during special operating phases or under abnormal weather conditions, thereby ensuring the thermal stability of the storage tank. Summary of the Invention

[0004] The embodiments disclosed herein are intended to at least address one of the technical problems existing in the prior art, and to provide an apparatus for suppressing molten salt stratification within a molten salt vessel.

[0005] Embodiments of this disclosure provide an apparatus for suppressing molten salt stratification within a molten salt vessel, the apparatus comprising: An electric rotary vane assembly, wherein the first end of the electric rotary vane assembly is located outside the molten salt tank and is used to provide driving force, and the second end of the electric rotary vane assembly is located inside the molten salt tank and is used to forcefully agitate the molten salt inside the molten salt tank and form a turbulent flow field; A flow-guiding structure is provided inside the molten salt tank and located at the bottom of the molten salt tank. The flow-guiding structure is used to expand the range of influence of the disturbed flow field at the bottom of the molten salt tank and guide the molten salt to flow to the bottom and side wall of the molten salt tank. Multiple flow channels are provided inside the molten salt tank and located on the side wall of the molten salt tank. The flow channels are used to cause the molten salt to form a vertical backflow path along the side wall of the molten salt tank under the action of the disturbed flow field.

[0006] Optionally, the electric rotor assembly includes a horizontal servo motor, a horizontal drive shaft, a vertical drive shaft, and a first rotor blade; The horizontal servo motor is installed on the heat exchange platform on the outside of the top of the molten salt tank. The output end of the horizontal servo motor is connected to the first end of the horizontal drive shaft. The second end of the horizontal drive shaft is connected to the first end of the vertical drive shaft through a transmission component. The second end of the vertical drive shaft extends into the molten salt tank and is connected to a first swivel blade. The horizontal drive shaft and the vertical drive shaft are perpendicular to each other.

[0007] Optionally, the electric rotor assembly further includes multiple connecting strips, a ring-shaped frame body, a moving part, and multiple second rotor blades; The movable part is mounted on the vertical drive shaft located inside the molten salt tank. The first ends of multiple connecting strips are spaced apart circumferentially to the movable part, and the second ends of multiple connecting strips are spaced apart circumferentially to the frame body. The second end of each of the connecting strips is hinged to the frame body, and a plurality of second blades are arranged at circumferential intervals along the frame body.

[0008] Optionally, the moving part includes a traction rail and a coupling, and the device further includes a detector, a controller and an electromagnetic clutch that are electrically connected to each other; The traction rail is fixed along the axial direction of the vertical drive shaft on the vertical drive shaft located inside the molten salt tank. The coupling is slidably connected to the traction rail via rollers. The first ends of multiple connecting bars are circumferentially spaced on the coupling. The electromagnetic clutch is used to connect the vertical drive shaft and the coupling; the detector is used to detect the state of molten salt in the molten salt tank and transmit the molten salt state signal to the controller. The controller is used to control the on / off state of the electromagnetic clutch according to the received molten salt state signal, thereby driving the coupling to slide along the traction track through the vertical drive shaft.

[0009] Optionally, a first limiter and a second limiter are respectively provided on the side of the traction track near the top of the molten salt tank and on the side away from the top of the molten salt tank; the first limiter and the second limiter are used to limit the maximum sliding path of the coupling along the traction track.

[0010] Optionally, the second swirl blade has a guide vane structure, and the second swirl blade is inclined relative to the frame body.

[0011] Optionally, the moving part is located above the maximum liquid level of the molten salt to reduce the impact of molten salt corrosion.

[0012] Optionally, the flow guiding structure is a vertical sheet-like component, which includes a central flow guiding plate arranged radially and a transition flow guiding plate connecting the central flow guiding plate and the corresponding flow guiding channel inlet; the central flow guiding plate extends outward from the central region at the bottom of the molten salt tank.

[0013] Optionally, the flow channel has a variable cross-section structure, and the flow channel includes an inlet section, a throat section and an outlet section connected sequentially from the bottom to the top of the molten salt tank; The inlet section is used to connect to the outlet of the drainage structure, and the cross-sectional area of ​​the pharyngeal section is smaller than that of the inlet section and the outlet section, respectively.

[0014] Optionally, the height between the inlet of the flow channel and the bottom of the molten salt tank is 1.5 times the height between the outlet of the flow diversion structure and the bottom of the molten salt tank.

[0015] The apparatus for suppressing molten salt stratification in a molten salt tank according to embodiments of this disclosure can be used as a supplement or backup to existing pump circulation systems. It can quickly intervene when a sudden increase in temperature difference occurs in the cold zone at the bottom and side walls of the tank. It achieves local temperature uniformity through physical stirring and diversion. It has advantages such as high reliability, low investment, and minimal modification to the existing tank structure, thereby improving the overall safety and stability of the molten salt tank operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a device for suppressing molten salt stratification in a molten salt tank according to an embodiment of the present disclosure; Figure 2 This is a schematic diagram illustrating the adjustment of the opening and closing angle of a device for suppressing molten salt stratification in a molten salt tank, according to an embodiment of this disclosure. Figure 3 This is a top view schematic diagram of the structure of an electric rotary blade assembly according to an embodiment of the present disclosure; Figure 4 This is a top view schematic diagram of a drainage structure and a flow guiding channel according to an embodiment of the present disclosure. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figures 1 to 4As shown, a device 100 for suppressing molten salt stratification within a molten salt vessel is disclosed. The device 100 includes an electrically driven vane assembly 110, a flow-guiding structure 120, and multiple flow-guiding channels 130. The first end of the electrically driven vane assembly 110 is located outside the molten salt vessel 200 and provides driving force. The second end of the electrically driven vane assembly 110 is located inside the molten salt vessel 200 and is used to forcibly agitate the molten salt within the molten salt vessel 200, forming a disturbed flow field. The flow-guiding structure 120 is disposed inside the molten salt vessel 200 and at its bottom. The flow-guiding structure 120 expands the range of influence of the disturbed flow field at the bottom of the molten salt vessel 200 and guides the molten salt to flow towards the bottom and sidewalls of the molten salt vessel 200. The flow channel 130 is disposed inside the molten salt tank 200 and located on the side wall of the molten salt tank 200. The flow channel 130 is used to cause the molten salt to form a vertical backflow path along the side wall of the molten salt tank 200 under the action of the disturbed flow field.

[0019] Specifically, such as Figures 1 to 4 As shown, the electric swivel assembly 110 is used to forcefully agitate the molten salt in the molten salt tank 200 to form a stable turbulent flow field inside the molten salt tank 200. The flow guiding structure 120 is disposed in the tank bottom region to expand the range of the turbulent flow field at the tank bottom and guide the molten salt to flow towards the tank bottom and side wall regions. Multiple flow guiding channels 130 are arranged circumferentially along the side wall of the molten salt tank 200, which can form a vertical backflow path of molten salt along the tank wall under the agitation action of the electric swivel assembly 110, realizing continuous agitation and rapid replacement of molten salt in the cold zone near the tank wall, thereby reducing the temperature stratification phenomenon inside the molten salt tank 200.

[0020] For example, such as Figure 1 As shown, the electric rotary vane assembly 110 includes a horizontal servo motor 111, a horizontal drive shaft 112, a vertical drive shaft 113, and a first rotary vane 114. The horizontal servo motor 111 is mounted on a heat exchange platform (not shown) on the outer side of the top of the molten salt tank 200. The output end of the horizontal servo motor 111 is connected to the first end of the horizontal drive shaft 112. The second end of the horizontal drive shaft 112 is connected to the first end of the vertical drive shaft 113 via a transmission component 300 (which can be a right-angle transmission coupling). The second end of the vertical drive shaft 113 extends into the molten salt tank 200 and is connected to the first rotary vane 114. The horizontal drive shaft 112 and the vertical drive shaft 113 are perpendicular to each other.

[0021] Specifically, such as Figure 1 As shown, a horizontal servo motor 111 is mounted on the heat exchange platform. The horizontal servo motor 111 is connected via a horizontal drive shaft 112 to a vertical drive shaft 113 located at the center of the top of the molten salt tank 200, thereby transmitting the driving force to the inside of the tank. The first vane 114 rotates and stirs the molten salt under the driving action. (Refer to...) Figure 3 The first rotor blade 114 can be configured in a cross shape. Of course, the first rotor blade 114 can also be configured in other structural forms. The embodiments disclosed herein do not impose specific limitations on this.

[0022] For example, such as Figures 1 to 3 As shown, the electric rotary blade assembly 110 further includes multiple connecting bars 115, a ring-shaped frame body 116, a moving part 117, and multiple second rotary blades 118. The moving part 117 is disposed on the vertical drive shaft 113 located inside the molten salt tank 200. The first ends of the multiple connecting bars 115 are circumferentially spaced and connected to the moving part 117, and the second ends of the multiple connecting bars 115 are circumferentially spaced and connected to the frame body 116. The second ends of each connecting bar 115 are hinged to the frame body 116, and the multiple second rotary blades 118 are arranged circumferentially spaced along the frame body 116. The second ends of the connecting bars 115 are hinged to the frame body 116 via hinge members 500. The hinge members 500 are spaced apart on the frame body 116 to divide the frame body 116 into multiple segmented structures connected by the hinge members 500.

[0023] Furthermore, the moving part 117 includes a traction rail 1171 and a coupling 1172. The traction rail 1171 is fixed along the axial direction of the vertical transmission shaft 113 located inside the molten salt tank 200. The coupling 1172 is slidably connected to the traction rail 1171 via rollers. The first ends of a plurality of connecting bars 115 are circumferentially spaced through the coupling 1172.

[0024] Specifically, such as Figures 1 to 3 As shown, the vertical drive shaft 113 divides the driving force into radial rotational force and axial traction force. The radial rotational force is transmitted through the vertical drive shaft 113 to the first vane 114 and the second vane 118 inside the molten salt tank 200 to agitate the molten salt. The axial traction force is transmitted through the coupling 1172 to pull the cage-like frame formed by multiple connecting bars 115 and the frame body 116 to adjust the opening and closing angle, thereby realizing the expansion and folding of the cage-like frame in the vertical direction.

[0025] The coupling 1172 is connected to the vertical transmission shaft 113 via mechanical rollers. Specifically, a roller structure inside the coupling 1172 is slidably connected to the traction rail 1171, allowing it to move up and down under axial traction force, thus folding and unfolding the connected cage-like frame. This dynamically adjusts the agitation range of the molten salt, and when fully folded, it facilitates removal from the molten salt tank 200 for maintenance. The moving part 117 is located above the maximum molten salt level to reduce the impact of molten salt corrosion. The coupling 1172 and the traction rail 1171 are positioned above the maximum molten salt level in the tank to minimize the impact of corrosion.

[0026] The device 100 further includes a detector, a controller, and an electromagnetic clutch (not shown) that are electrically connected to each other. The electromagnetic clutch is used to connect the vertical drive shaft 113 and the coupling 1172. The detector is used to detect the state of the molten salt in the molten salt tank 200 and transmit the molten salt state signal to the controller. The controller is used to control the on / off state of the electromagnetic clutch according to the received molten salt state signal, thereby driving the coupling 1172 to slide along the traction rail 1171 through the vertical drive shaft 113.

[0027] The traction rail 1171 is provided with a first limiter and a second limiter (not shown) on the side near the top of the molten salt tank 200 and the side away from the top of the molten salt tank 200, respectively. The first limiter and the second limiter are used to limit the maximum sliding path of the coupling 1172 along the traction rail 1171.

[0028] As another example, such as Figure 2 As shown, the vertical drive shaft 113 can also be configured to include an extension section 400, which extends further to the bottom of the molten salt tank 200. The extension section 400 is located within the cage-like frame, and the bottom of the cage-like frame is connected to the blades via hinge points, which can both achieve folding and be used to agitate the molten salt and guide it to the bottom drainage structure 120 of the tank. The frame body 116 cooperates with the first blade 114 and the second blade 118 to guide the molten salt into the guide channel 130.

[0029] Both the first swirl vane 114 and the second swirl vane 118 are made of high-temperature and corrosion-resistant stainless steel. The second swirl vane 118 has a guide vane structure and is inclined relative to the frame body 116. The second swirl vane 118, designed as a guide vane structure, together with the bottom flow guide structure 120 and the tank wall flow guide channel 130, forms a multi-path molten salt flow channel. A hinge point is provided in the middle of the second swirl vane for easy folding and adjustment of rotation. Of course, the first swirl vane 114 can also be configured as a guide vane structure.

[0030] For example, such as Figure 1 and Figure 4As shown, the flow guiding structure 120 is a vertical sheet-like component. The flow guiding structure 120 includes a central flow guiding plate 121 arranged radially and a transition flow guiding plate 122 connecting the central flow guiding plate 121 to the inlet of the flow guiding channel 130. The central flow guiding plate 121 extends outward from the central region of the bottom of the molten salt tank 200.

[0031] Specifically, such as Figure 4 As shown, the flow guiding structure 120 is a vertical, sheet-like component welded to the bottom of the molten salt tank 200, specifically made of high-temperature and corrosion-resistant stainless steel. Driven by the electric rotary vane assembly 110, the molten salt flows along the bottom of the tank through the flow guiding structure 120, expanding the diffusion capacity and influence range of the molten salt flow caused by the first rotary vane 114 and the second rotary vane 118. The central guide vane 121 extends outward from the center of the tank bottom, corresponding to the first rotary vane 114. The transition guide vane 122 extends from the area corresponding to the second rotary vane 118 to the flow channel 130 on the side wall of the molten salt tank 200, realizing multi-level gradient flow of the molten salt at the bottom.

[0032] The flow channel 130 is a vertical flow guide cavity welded to the inner side wall of the molten salt tank 200, specifically made of high-temperature and corrosion-resistant stainless steel. The inlet of the flow guide cavity is located at the outlet of the tank bottom flow guide structure 120, and is used to receive the cold molten salt at the bottom of the tank after being disturbed by the electric vane assembly 110 and guided by the tank bottom flow guide structure 120, so as to realize the radial flow and exchange of molten salt.

[0033] For example, such as Figure 4 As shown, the flow channel 130 has a variable cross-section structure and includes an inlet section 131, a pharyngeal section 132, and an outlet section 133 connected sequentially from the bottom to the top of the molten salt tank 200. The inlet section 131 is used to connect to the outlet of the drainage structure 120, and the cross-sectional area of ​​the pharyngeal section 132 is smaller than that of the inlet section 131 and the outlet section 133.

[0034] Specifically, such as Figure 1 and Figure 2 As shown, the flow channel 130 is a variable cross-section structure with a larger fluid inlet and outlet diameter and a smaller diameter in the middle. By forming a velocity difference in the flow channel 130, the vertical flow of molten salt in the channel is accelerated and the suction and reflux effects are enhanced.

[0035] Furthermore, the height between the inlet of the flow guiding channel 130 and the bottom of the molten salt tank 200 is 1.5 times the height between the outlet of the flow guiding structure 120 and the bottom of the molten salt tank 200. Setting the inlet height of the flow guiding channel 130 to be 1.5 times the outlet height of the flow guiding structure 130 allows the molten salt to form a stable vertical backflow acceleration path along the tank wall under the combined action of gravity and the turbulent flow field. This, in conjunction with the electric swivel assembly 110 and the flow guiding structure 120, forms a complete and continuous molten salt circulation loop.

[0036] The apparatus for suppressing molten salt stratification in a molten salt tank according to embodiments of the present disclosure can achieve uniform flow of molten salt without relying on or weakening the internal circulation operation of the molten salt pump by applying forced physical disturbance to the molten salt in the tank. This reduces the system's dependence on the continuous operation of the high-temperature molten salt pump, improves the overall operational reliability of the system, and effectively reduces the comprehensive investment cost of the thermal storage system.

[0037] The electric rotary vane assembly has the ability to dynamically adjust the opening and closing angle, which can be dynamically adjusted according to the degree of molten salt stratification and turbulence requirements, reducing energy consumption while ensuring agitation effect. In maintenance conditions, the cage frame can be completely folded and retracted, making the overall size smaller than the manhole size of the molten salt tank, allowing it to be lifted out as a whole for inspection and maintenance, improving the maintainability and engineering applicability of the equipment.

[0038] To address the issues of strong heat exchange in the contact area between the bottom of the molten salt tank and the ground and foundation structure, which easily leads to the formation of low-temperature zones and induces molten salt stratification, the embodiments of this disclosure further propose a fixed flow guiding structure set in the bottom area of ​​the tank, based on the mechanical rotational disturbance structure. By guiding and strengthening the flow direction of the molten salt at the bottom, the flow and displacement capacity of the molten salt in this area is enhanced, providing an effective physical solution for suppressing the bottom stratification phenomenon caused by temperature difference.

[0039] The flow-guiding structure acts radially to expand the influence range of the electric swivel assembly at the tank bottom, while the flow-guiding channel guides the flow axially to enhance the disturbance and circulation between the upper and lower layers of molten salt. Although the above structure occupies relatively little space, it can create highly efficient localized enhanced flow in the bottom and sidewall areas of the tank where temperature stratification is most likely to occur, thereby driving the overall circulation of molten salt and achieving the effect of "leveraging a large flow with a small structure." While achieving good stratification suppression, it also has the advantages of simple structure, low investment, and no impact on the normal operation of the molten salt storage tank.

[0040] The apparatus for suppressing molten salt stratification within a molten salt tank, as an auxiliary flow guiding method in addition to the internal circulation mode of the molten salt pump, comprises an electrically driven swivel assembly that generates a combined axial and radial disturbance flow field within the tank through mechanical rotation, achieving initial agitation of the molten salt. The tank bottom drainage structure and tank wall guiding channels, through metal structures, directionally guide the flow path of the molten salt in the cold side regions of the tank bottom and tank wall, working in conjunction with the swivel assembly to create a coupled flow field of the molten salt in the tank bottom and side wall regions. The two structures work together to achieve timely replacement and temperature homogenization of the molten salt that is rapidly cooled locally due to preheating, extreme weather, or rapid heat exchange with the outside environment of the tank, thereby effectively suppressing temperature stratification within the molten salt storage tank.

[0041] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A device for suppressing molten salt stratification in a molten salt vessel, characterized in that, The device includes: An electric rotary vane assembly, wherein the first end of the electric rotary vane assembly is located outside the molten salt tank and is used to provide driving force, and the second end of the electric rotary vane assembly is located inside the molten salt tank and is used to forcefully agitate the molten salt inside the molten salt tank and form a turbulent flow field; A flow-guiding structure is provided inside the molten salt tank and located at the bottom of the molten salt tank. The flow-guiding structure is used to expand the range of influence of the disturbed flow field at the bottom of the molten salt tank and guide the molten salt to flow to the bottom and side wall of the molten salt tank. Multiple flow channels are provided inside the molten salt tank and located on the side wall of the molten salt tank. The flow channels are used to cause the molten salt to form a vertical backflow path along the side wall of the molten salt tank under the action of the disturbed flow field.

2. The apparatus for suppressing molten salt stratification in a molten salt vessel according to claim 1, characterized in that, The electric rotor assembly includes a horizontal servo motor, a horizontal drive shaft, a vertical drive shaft, and a first rotor blade. The horizontal servo motor is installed on the heat exchange platform on the outside of the top of the molten salt tank. The output end of the horizontal servo motor is connected to the first end of the horizontal drive shaft. The second end of the horizontal drive shaft is connected to the first end of the vertical drive shaft through a transmission component. The second end of the vertical drive shaft extends into the molten salt tank and is connected to a first swivel blade. The horizontal drive shaft and the vertical drive shaft are perpendicular to each other.

3. The apparatus for suppressing molten salt stratification in a molten salt vessel according to claim 2, characterized in that, The electric rotor assembly also includes multiple connecting strips, a ring-shaped frame body, a moving part, and multiple second rotor blades; The movable part is mounted on the vertical drive shaft located inside the molten salt tank. The first ends of multiple connecting strips are spaced apart circumferentially to the movable part, and the second ends of multiple connecting strips are spaced apart circumferentially to the frame body. The second end of each of the connecting strips is hinged to the frame body, and a plurality of second blades are arranged at circumferential intervals along the frame body.

4. The apparatus for suppressing molten salt stratification in a molten salt vessel according to claim 3, characterized in that, The moving part includes a traction rail and a coupling, and the device also includes a detector, a controller and an electromagnetic clutch that are electrically connected to each other; The traction rail is fixed along the axial direction of the vertical drive shaft on the vertical drive shaft located inside the molten salt tank. The coupling is slidably connected to the traction rail via rollers. The first ends of multiple connecting bars are circumferentially spaced on the coupling. The electromagnetic clutch is used to connect the vertical drive shaft and the coupling; the detector is used to detect the state of molten salt in the molten salt tank and transmit the molten salt state signal to the controller. The controller is used to control the on / off state of the electromagnetic clutch according to the received molten salt state signal, thereby driving the coupling to slide along the traction track through the vertical drive shaft.

5. The apparatus for suppressing molten salt stratification in a molten salt vessel according to claim 4, characterized in that, The traction track is provided with a first limiter and a second limiter on the side near the top of the molten salt tank and the side away from the top of the molten salt tank, respectively; the first limiter and the second limiter are used to limit the maximum sliding path of the coupling along the traction track.

6. The apparatus for suppressing molten salt stratification in a molten salt vessel according to claim 3, characterized in that, The second swirl blade has a guide vane structure and is inclined relative to the frame body.

7. The apparatus for suppressing molten salt stratification in a molten salt vessel according to claim 3, characterized in that, The movable part is located above the maximum liquid level of the molten salt to reduce the impact of molten salt corrosion.

8. The apparatus for suppressing molten salt stratification in a molten salt vessel according to any one of claims 1 to 7, characterized in that, The flow guiding structure is a vertical sheet-like component, which includes a central flow guiding plate arranged radially and a transition flow guiding plate connecting the central flow guiding plate and the corresponding flow guiding channel inlet; the central flow guiding plate extends outward from the central area at the bottom of the molten salt tank.

9. The apparatus for suppressing molten salt stratification in a molten salt vessel according to any one of claims 1 to 7, characterized in that, The flow channel has a variable cross-section structure and includes an inlet section, a throat section, and an outlet section that are connected sequentially from the bottom to the top of the molten salt tank. The inlet section is used to connect to the outlet of the drainage structure, and the cross-sectional area of ​​the pharyngeal section is smaller than that of the inlet section and the outlet section, respectively.

10. The apparatus for suppressing molten salt stratification in a molten salt vessel according to any one of claims 1 to 7, characterized in that, The height between the inlet of the flow channel and the bottom of the molten salt tank is 1.5 times the height between the outlet of the flow diversion structure and the bottom of the molten salt tank.

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