A heat absorption tower liquid hot molten salt potential energy recovery device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NORTHWEST ENGINEERING CORPORATION LIMITED
- Filing Date
- 2026-04-30
- Publication Date
- 2026-05-29
Smart Images
Figure CN122106807A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of tower-type solar thermal power generation technology, and in particular to a device for recovering the potential energy of liquid molten salt in a heat-absorbing tower. Background Technology
[0002] Tower-type molten salt concentrated solar power (CSP) is a renewable energy generation technology that integrates power generation and long-term energy storage, and it is one of the core technologies supporting the safe and stable operation of new power systems. In the core process of a tower-type CSP plant, cold molten salt is lifted to the top of a 180-250m high absorber tower. After being heated to a high temperature of over 550℃ by the absorber, it flows back to a molten salt storage tank on the ground via a downcomer under gravity. During this process, the hundreds of meters of height difference cause the molten salt to continuously accelerate during its descent, releasing enormous gravitational potential energy. Simultaneously, it generates extremely strong fluid impacts and pipeline pressure differentials, preventing it from directly entering the storage tank.
[0003] In existing conventional technical solutions, a vertically arranged hot salt downcomer is commonly used, without segmented flow regulation structures. As the hot molten salt continuously accelerates along the downcomer, the flow field becomes highly turbulent, causing severe impacts on the pipeline and downstream equipment. To eliminate these impacts and control the inlet pressure, only 2-3 sets of large differential pressure regulating valves can be installed on the downcomer to forcibly dissipate the kinetic and potential energy of the hot molten salt through throttling. However, this design has unavoidable core flaws: First, the regulating valve is subjected to continuous scouring by high-temperature, high-speed molten salt, resulting in rapid valve wear, high failure rate, and high equipment investment and subsequent maintenance and replacement costs. Furthermore, valve failure directly affects the continuous and stable operation of the power plant. Second, the large amount of usable gravitational potential energy contained in the descent of the hot molten salt is completely dissipated by the regulating valve, while the lifting of the cold molten salt to the top of the tower requires a large amount of plant power, resulting in a severe energy imbalance in the hot and cold salt circulation process. This makes it impossible to effectively reduce the plant power consumption rate, leading to poor project economics. Third, the entire vertical high-temperature pipeline with a large drop has a huge temperature difference between the operating temperature and the ambient temperature, with an axial thermal expansion of over 1.5m. Conventional simple support structures cannot effectively release thermal stress and suppress pipeline vibration, making it prone to stress concentration, weld tearing, pipeline resonance, and other problems, posing a significant safety risk of high-temperature molten salt leakage. Summary of the Invention
[0004] This disclosure provides a device for recovering the potential energy of liquid molten salt in a heat absorption tower, which aims to solve the technical problems of unreasonable pipeline design in existing tower-type molten salt solar thermal power generation, which requires the use of regulating valves to reduce pressure, resulting in easy damage and waste of molten salt potential energy.
[0005] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure.
[0006] According to one aspect of this disclosure, a heat-absorbing tower liquid molten salt potential energy recovery device is provided, which mainly includes: a tower, a hot salt pipeline assembly, a first support assembly, a second support assembly, a kinetic energy conversion assembly, and a power generation assembly; a heat absorber is installed on the top of the tower, and the tower includes a frame-type steel frame structure, the steel frame structure including horizontal steel beams and vertical steel beams; the hot salt pipeline assembly is installed inside the tower for transporting hot salt, including multiple sets of one-to-one corresponding vertical pipes and horizontal pipes, the vertical pipes and horizontal pipes being alternately arranged; the first support assembly includes multiple first support members, the first support members being fixedly connected to the steel frame structure, and the side facing away from the steel frame structure being fixedly connected to the vertical pipes, the multiple first support members being arranged around the same horizontal plane. The vertical pipes are arranged in a periphery array; the second support assembly includes a hoisting structure and a connecting structure. The hoisting structure includes a hoisting component and a support platform. The connecting structure includes a second support component, which is fitted around the periphery of the horizontal pipe and fixedly connected to the upper surface of the support platform. The hoisting component is connected between the support platform and the horizontal steel beam; a kinetic energy conversion assembly and a power generation assembly are both mounted on the tower, and the output end of the kinetic energy conversion assembly is connected to the input end of the power generation assembly; wherein, the hot salt pipe assembly has at least one pipe outlet in the vertical direction, and the jet direction of the pipe outlet corresponds to the tangential direction of the impeller of the kinetic energy conversion assembly. The hot salt impact drives the kinetic energy conversion assembly to operate, thereby driving the power generation assembly to generate electricity.
[0007] In some example embodiments of this disclosure, based on the aforementioned scheme, the wall thickness of vertical and horizontal pipes is negatively correlated with the height of the pipe.
[0008] In some exemplary embodiments of this disclosure, based on the aforementioned scheme, the heat absorption tower liquid molten salt potential energy recovery device further includes a cold salt pipeline assembly. The cold salt pipeline assembly includes a cold salt pipeline, and the cold salt pipeline adopts the same arrangement as the hot salt pipeline assembly. A first support assembly and a second support assembly are provided on the outside of the cold salt pipeline. The cold salt pipeline and its matching first and second support components are made of the same material, and the hot salt pipeline and its matching first and second support components are made of the same material. However, the cold salt pipeline assembly and the hot salt pipeline assembly are made of different materials.
[0009] In some example embodiments of this disclosure, based on the aforementioned scheme, the first support member includes a cantilever connecting seat, a heat insulation pad, and connecting bolts. One end of the cantilever connecting seat is an arc-shaped connecting plate with the same curvature as the vertical pipe. The other end of the cantilever connecting seat is arranged along the axis perpendicular to the arc-shaped connecting plate and is fixedly connected to the horizontal steel beam by connecting bolts. The heat insulation pad is arranged between the horizontal steel beam and the cantilever connecting seat.
[0010] In some example embodiments of this disclosure, based on the aforementioned scheme, the heat insulation pad is made of calcium silicate material, and has a heat resistance temperature greater than or equal to 600°C, a thermal conductivity less than or equal to 0.055 W / (m·K), and a compressive strength greater than or equal to 3 MPa.
[0011] In some example embodiments of this disclosure, based on the aforementioned scheme, there are at least two lifting components, arranged in a horizontal direction, and the setting direction of the two lifting components is perpendicular to the extension direction of the horizontal pipe.
[0012] In some exemplary embodiments of this disclosure, based on the aforementioned scheme, the heat absorption tower liquid molten salt potential energy recovery device further includes a pipe limiting assembly. The pipe limiting assembly is disposed at both ends of the vertical pipe and fixedly connected to the steel frame structure. The pipe limiting assembly includes two sets of symmetrically arranged outer ring pipe clamps, U-shaped supports, and limiting connecting plates. The outer ring pipe clamps are semi-circular arc clamps with the same curvature as the vertical pipe. The radial outer side of the outer ring pipe clamps is fixedly connected to the U-shaped supports. The limiting connecting plate includes two vertical plates and a vertical end plate. The vertical plates are fixedly connected to the steel frame structure, and the vertical end plate is welded and fixed to the two vertical plates. The vertical end plate is parallel to the bottom plate of the U-shaped support.
[0013] In some example embodiments of this disclosure, based on the aforementioned scheme, the kinetic energy conversion component includes a sealed cavity, a rotor assembly and a drive shaft. One end of the drive shaft is rigidly connected to the rotor assembly, and the other end is connected to the input end of the power generation component. A cluster nozzle is provided at the pipe outlet to spray hot salt to impact the rotor assembly to rotate, thereby driving the power generation component to generate electricity.
[0014] In some example embodiments of this disclosure, based on the foregoing scheme, there are multiple pipe outlets, or a single pipe outlet is connected to multiple cluster nozzles, and the cluster nozzles are arranged in an array around the rotation axis of the rotary wheel assembly.
[0015] In some example embodiments of this disclosure, based on the aforementioned scheme, in the hot salt pipeline assembly, each fixed number of alternating vertical and horizontal pipelines constitute a potential energy recovery unit, or after the hot salt descends vertically to a fixed height, a corresponding kinetic energy conversion component and power generation component are set at the corresponding end of the horizontal pipeline; the pipeline outlet is formed at the downstream end of the corresponding horizontal pipeline, and the salt outlet of the kinetic energy conversion component is connected to the next set of vertical pipelines.
[0016] The technical solutions provided in this disclosure can include the following beneficial effects: This disclosure provides a liquid molten salt potential energy recovery device for a heat absorption tower, solving the core problem of existing technologies that rely on large differential pressure regulating valves for pressure reduction. This disclosure employs a hot salt pipeline structure with alternating vertical and horizontal pipes. The vertical pipe sections allow the molten salt to convert its potential energy into kinetic energy under gravity, while the horizontal pipe sections slow and rectify the accelerated molten salt, eliminating flow field turbulence and reducing fluid impact. This eliminates the need for large differential pressure regulating valves to control the molten salt flow rate and pipeline pressure, completely avoiding the problems of valve wear, high failure rate, and high investment and maintenance costs caused by long-term high-speed molten salt erosion. This ensures the continuous and stable operation of the power plant.
[0017] This disclosure achieves efficient recovery and utilization of the gravitational potential energy of molten salt, solving the problem of serious energy waste in existing technologies. Through kinetic energy conversion components and power generation components adapted to the pipeline structure, this disclosure converts the gravitational potential energy released during the descent of molten salt into usable electrical energy. The recovered electrical energy can be directly supplied to the power plant's auxiliary power system, significantly reducing the auxiliary power consumption rate of the solar thermal power plant and significantly improving the overall economic efficiency of the project.
[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description
[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.
[0020] Figure 1 A schematic diagram of the overall structure of a heat absorption tower provided in one embodiment of the present disclosure is shown.
[0021] Figure 2 A top view schematic diagram of the use of a first support component provided in one embodiment of the present disclosure is shown.
[0022] Figure 3 A side view of a first support component provided in one embodiment of the present disclosure is shown in use.
[0023] Figure 4 A side view schematic diagram of the second support component provided in one embodiment of the present disclosure is shown in use.
[0024] Figure 5 A front view schematic diagram of the second support component provided in one embodiment of the present disclosure is shown in use.
[0025] Figure 6A top view schematic diagram of the use of a pipe limiting assembly provided in one embodiment of the present disclosure is shown.
[0026] Figure 7 A side view of a pipe limiting assembly provided in one embodiment of the present disclosure is shown in use.
[0027] Figure 8 A schematic diagram of the internal structure of a kinetic energy conversion component provided in one embodiment of the present disclosure is shown.
[0028] Figure 9 This diagram shows a bottom plan view of a through-layer support structure and connector provided in one embodiment of the present disclosure.
[0029] Figure 10 A top-level plan view of a through-layer support structure and connector provided in one embodiment of the present disclosure is shown.
[0030] Figure 11 A side view of a layered support structure provided in one embodiment of the present disclosure is shown.
[0031] Explanation of reference numerals in the attached figures: 1. Tower; 11. Steel frame structure; 111. Horizontal steel beam; 112. Vertical steel beam; 2. Hot salt pipeline assembly; 21. Vertical pipeline; 22. Horizontal pipeline; 23. Pipeline outlet; 24. Cluster nozzle; 3. First support assembly; 31. First support member; 311. Cantilever connector; 312. Heat insulation pad; 313. Connecting bolt; 4. Second support assembly; 41. Lifting structure; 42. Connection structure; 5. Kinetic energy conversion assembly; 51 52. Sealed cavity; 53. Rotary wheel assembly; 54. Drive shaft; 55. Salt discharge pipe; 6. Power generation assembly; 7. Cold salt pipe assembly; 8. Pipe limiting assembly; 81. Outer ring pipe clamp; 82. U-shaped support; 83. Limiting connection plate; 9. Through-layer support structure and connectors; 91. Reinforcing column on beam; 92. Intermediate reinforcing column; 93. Outer reinforcing main beam; 94. Outer reinforcing secondary beam; 95. Top reinforcing member; 96. Irregularly shaped combined connecting beam. Detailed Implementation
[0032] The embodiments of the technical solutions disclosed herein will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solutions disclosed herein and are therefore intended to limit the scope of protection of this disclosure.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and foregoing description of the drawings of this disclosure are intended to cover non-exclusive inclusion.
[0034] In the description of the embodiments of this disclosure, technical terms such as "first," "second," "third," "fourth," and "fifth" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary or secondary relationship of the indicated technical features. In the description of the embodiments of this disclosure, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.
[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0036] In the description of the embodiments of this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.
[0037] In the description of the embodiments of this disclosure, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this disclosure.
[0038] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.
[0039] In the description of the embodiments of this disclosure, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.
[0040] Please see Figure 1 According to one aspect of this disclosure, a heat-absorbing tower liquid molten salt potential energy recovery device is provided, which mainly includes: a tower 1, a hot salt pipeline assembly 2, a first support assembly 3, a second support assembly 4, a kinetic energy conversion assembly 5, and a power generation assembly 6; a heat absorber is provided on the top of the tower 1, and the tower 1 includes a frame-type steel frame structure 11, which includes horizontal steel beams 111 and vertical steel beams 112; the hot salt pipeline assembly 2 is disposed inside the tower 1 for transporting hot salt, and includes multiple sets of one-to-one corresponding vertical pipes 21 and horizontal pipes 22, which are alternately arranged; the first support assembly 3 includes multiple first support members 31, which are fixedly connected to the steel frame structure 11, and the side facing away from the steel frame structure 11 is fixedly connected to the vertical pipes 21, and the multiple first support members 31 are in the same The horizontal array is arranged around the periphery of the vertical pipe 21; the second support component 4 includes a hoisting structure 41 and a connecting structure 42. The hoisting structure 41 includes a hoisting component and a support platform. The connecting structure 42 includes a second support component, which is fitted around the periphery of the horizontal pipe 22 and fixedly connected to the upper surface of the support platform. The hoisting component is connected between the support platform and the horizontal steel beam 111; the kinetic energy conversion component 5 and the power generation component 6 are both installed on the tower 1, and the output end of the kinetic energy conversion component 5 is connected to the input end of the power generation component 6; wherein, the hot salt pipe assembly 2 is provided with at least one pipe outlet 23 in the vertical direction. The jet direction of the pipe outlet 23 corresponds to the tangential direction of the rotor of the kinetic energy conversion component 5. The hot salt impact drives the kinetic energy conversion component 5 to operate, which in turn drives the power generation component 6 to generate electricity.
[0041] The vertical pipe 21 is used to allow the hot molten salt to complete the conversion of gravitational potential energy into kinetic energy under the action of gravity, and the horizontal pipe 22 is used to slow down and rectify the accelerated molten salt, eliminate flow field turbulence, and reduce fluid impact. Multiple first support members 31 of the first support assembly 3 are arranged in an array along the periphery of the vertical pipe 21 on the same horizontal plane, and are fixedly connected to the steel frame structure 11 and the outer wall of the pipe, forming a rigid fixed constraint on the vertical pipe 21; the second support assembly 4 is fixed to the horizontal pipe 22 by the second support member, and is connected to the horizontal steel beam 111 through the support platform and the hoisting component, forming a flexible hoisting constraint on the horizontal pipe 22. The two work together to form a rigid-flexible pipe support system; the jet direction of the pipe outlet 23 corresponds to the tangential direction of the wheel of the kinetic energy conversion assembly 5, ensuring that the molten salt impact energy is maximized to be converted into the rotational mechanical energy of the wheel, and avoiding energy loss caused by axial impact.
[0042] The hot molten salt falls through alternating pipes in stages, and the flow rate and pressure can be controlled without the need for a large differential pressure regulating valve. At the same time, the gravitational potential energy of the molten salt is converted into electrical energy through the kinetic energy conversion component 5 and the power generation component 6, thus realizing energy recovery.
[0043] In this type of embodiment, the traditional large differential pressure regulating valve is fundamentally replaced, completely avoiding the core pain points of valve components being easily worn by high-speed molten salt erosion, high failure rate, and high operation and maintenance cost. The alternating pipeline structure realizes the slow flow rectification of molten salt, and with the rigid and flexible cross support system, it takes into account the stability of pipeline operation and the efficient recovery of potential energy, realizes the resource utilization of molten salt gravitational potential energy, and reduces the power plant's power consumption rate.
[0044] In some example embodiments of this disclosure, based on the aforementioned scheme, the wall thickness of the vertical pipe 21 and the horizontal pipe 22 is negatively correlated with the height of the pipe.
[0045] In this type of embodiment, the lower the height of the pipeline, the greater the pipe wall thickness; the higher the height, the smaller the pipe wall thickness. As the molten salt descends, the static pressure inside the pipeline continuously increases with decreasing height. The pressure on the lower pipeline of the tower is much greater than that on the upper pipeline. This wall thickness design not only meets the pressure requirements of pipelines at different heights, but also avoids the problems of material waste and excessive pipeline weight caused by uniform thick walls throughout the entire pipeline section.
[0046] The above solution achieves a precise match between pipe wall thickness and pressure conditions. While ensuring the safety of the pipe under pressure, it minimizes the amount of pipe material used, reduces the self-weight of the pipe and the load on the supporting structure, simplifies the difficulty of pipe hoisting and construction, and significantly improves the economy and construction convenience of the system.
[0047] Please see Figure 1In some example embodiments of this disclosure, based on the aforementioned scheme, the heat absorption tower liquid hot molten salt potential energy recovery device further includes a cold salt pipeline assembly 7. The cold salt pipeline assembly 7 includes a cold salt pipeline, and the cold salt pipeline adopts the same arrangement as the hot salt pipeline assembly 2. A first support assembly 3 and a second support assembly 4 are provided on the outside of the cold salt pipeline. The cold salt pipeline and its matching first support member 31 and second support member are made of the same material. The hot salt pipeline and its matching first support member 31 and second support member are made of the same material. The cold salt pipeline assembly 7 and the hot salt pipeline assembly 2 are made of different materials.
[0048] The operating conditions of cold salt pipelines and hot salt pipelines differ fundamentally. Cold salt operates at temperatures of 290-400℃, while hot salt operates at 550-580℃. Therefore, in this embodiment, both the cold salt pipeline and its supporting components are made of the same material, and both the hot salt pipeline and its supporting components are made of the same material, but the two types of materials are different. This design ensures that the thermal deformation of the cold and hot salt pipelines under their respective operating conditions is consistent with that of the supporting components, reducing internal stress in the pipelines, and eliminating the need for a separate support system for the cold salt pipelines.
[0049] Optionally, cold salt pipes and corresponding supports are made of Q355R steel, while hot salt pipes and corresponding supports are made of 347H stainless steel.
[0050] This embodiment achieves precise material matching for the different operating conditions of hot and cold salt pipelines, avoiding the problem of internal stress concentration caused by inconsistent thermal deformation of pipelines and support components under different temperature conditions; the unified pipeline layout and support system greatly saves the limited space in the heat absorption tower, reduces design and construction costs, and realizes the synchronous and stable layout and operation of hot and cold salt pipelines in tower 1.
[0051] Please see Figure 2 and Figure 3 In some example embodiments of this disclosure, based on the aforementioned scheme, the first support member 31 includes a cantilever connecting seat 311, a heat insulation pad 312, and a connecting bolt 313. One end of the cantilever connecting seat 311 is an arc-shaped connecting plate with the same curvature as the vertical pipe 21. The other end of the cantilever connecting seat 311 is arranged along the axis perpendicular to the arc-shaped connecting plate and is fixedly connected to the horizontal steel beam 111 by the connecting bolt 313. The heat insulation pad 312 is disposed between the horizontal steel beam 111 and the cantilever connecting seat 311.
[0052] In this type of embodiment, one end of the cantilever connector 311 is an arc-shaped connecting plate with a curvature that is completely consistent with the curvature of the vertical pipe 21, allowing it to be fully welded to the outer wall of the pipe and avoiding stress concentration during welding. The other end of the cantilever connector 311 extends in a direction perpendicular to the axis of the vertical pipe 21 and is fixedly connected to the horizontal steel beam 111 by connecting bolts 313, ensuring that the force on the pipe is evenly transmitted to the steel frame structure 11.
[0053] The heat insulation pad 312 is installed between the horizontal steel beam 111 and the cantilever connection seat 311. Its core function is to block the heat conduction from the high-temperature pipeline to the steel frame structure 11, thereby preventing the steel structure from creeping and deforming due to heat. The cantilever connection seat 311 adopts a concave structure with a base plate and double side plates, which has excellent bending stiffness and can stably withstand the vertical and horizontal loads of the pipeline.
[0054] The fully fitted design of the arc-shaped connecting plate and the pipe avoids the risk of weld cracking caused by local welding stress concentration; the setting of the heat insulation pad 312 blocks the transmission of high temperature to the steel structure from the source, ensuring the long-term mechanical stability of the main structure of the tower 1; the concave cantilever structure has the advantages of high bending stiffness and lightweight, realizing a reliable rigid connection between the pipe and the steel frame structure 11.
[0055] In some example embodiments of this disclosure, based on the aforementioned scheme, the heat insulation pad 312 is made of calcium silicate material, and has a heat resistance temperature greater than or equal to 600°C, a thermal conductivity less than or equal to 0.055W / (m・K), and a compressive strength greater than or equal to 3MPa.
[0056] Calcium silicate is a special thermal insulation material for high-temperature working conditions. Its heat resistance temperature is ≥600℃, which can be fully adapted to hot salt working conditions of 550~580℃ without the problems of high-temperature carbonization or failure. Its thermal conductivity is ≤0.055W / (m・K), which has excellent thermal insulation performance and can control the temperature of the steel frame structure to below 60℃, which meets the requirements of steel structure design specifications. Its compressive strength is ≥3MPa, which can stably withstand the vertical load of pipes and supporting structures without being crushed.
[0057] In a specific scenario, the temperature on the hot salt pipeline side is 565℃, but after being isolated by the 80mm thick heat insulation pad 312, the temperature on the steel beam side is only 52℃.
[0058] In this embodiment, by limiting the core performance parameters of the heat insulation pad 312, the triple stability of heat insulation performance, load-bearing performance and heat resistance performance under high temperature conditions is ensured. This completely avoids the problem of steel structure overheating and deformation caused by the failure of the heat insulation pad 312 under high temperature conditions, while meeting the safety specifications for steel structure design and greatly improving the long-term operational reliability of the support system.
[0059] Please see Figure 4 and Figure 5 In some example embodiments of this disclosure, based on the aforementioned scheme, there are at least two lifting components, which are arranged in a horizontal direction, and the setting direction of the two lifting components is perpendicular to the extension direction of the horizontal pipe 22.
[0060] The dual-point symmetrical hoisting design ensures the force balance of the horizontal pipe 22 and avoids pipe tilting and weld stress concentration caused by single-point hoisting. The hoisting components can be made of solid steel bars with high vertical stiffness, which can stably bear the load of the pipe's own weight and the molten salt inside the pipe. At the same time, the low lateral stiffness allows the pipe to undergo limited thermal deformation in the horizontal direction, releasing the pipe's thermal stress and perfectly matching the flexible hoisting constraint function of the second support component 4.
[0061] The dual-point vertical hoisting design achieves force balance in the horizontal pipe 22, avoiding the risk of molten salt leakage caused by pipe tilting and uneven stress on the flange sealing surface; it takes into account both the vertical fixation of the pipe and the release of thermal deformation in the horizontal direction, reducing the thermal stress of the pipe from the source and improving the operational stability and service life of the horizontal pipe section.
[0062] Please see Figure 6 and Figure 7 In some example embodiments of this disclosure, based on the aforementioned scheme, the liquid molten salt potential energy recovery device of the heat absorption tower further includes a pipe limiting component 8. The pipe limiting component 8 is disposed at both ends of the vertical pipe 21 and is fixedly connected to the steel frame structure 11. The pipe limiting component 8 includes two sets of symmetrically arranged outer ring pipe clamps 81, U-shaped supports 82 and limiting connecting plates 83. The outer ring pipe clamps 81 are semi-circular arc clamps with the same curvature as the vertical pipe 21. The radial outer side of the outer ring pipe clamps 81 is fixedly connected to the U-shaped supports 82. The limiting connecting plate 83 includes two vertical plates and a vertical end plate. The vertical plates are fixedly connected to the steel frame structure 11, and the vertical end plate is welded and fixed to the two vertical plates. The vertical end plate is parallel to the bottom plate of the U-shaped support 82.
[0063] The outer ring pipe clamp 81 is a semi-circular arc clamp, with two semi-circular arc clamps encircling and fixing to the outer wall of the vertical pipe 21. The curvature of the clamp perfectly matches that of the pipe, ensuring a secure fixation without damaging it. The outer ring pipe clamp 81 is fixedly connected to the U-shaped support 82. The vertical end plate of the limiting connection plate 83 is parallel to the bottom plate of the U-shaped support 82, with a pre-reserved limiting gap between them. This structure can control the lateral displacement of the pipe within a safe range, preventing excessive lateral sway that could cause vibration, while also not restricting the axial thermal expansion and contraction of the pipe.
[0064] This embodiment achieves precise limiting of the lateral displacement of the vertical pipe 21, effectively suppressing the lateral swing and pipe vibration caused by high-speed fluid in the large drop pipe, avoiding the safety risks of pipe resonance and weld tearing; at the same time, it completely releases the axial thermal deformation space of the pipe, taking into account the dual requirements of pipe limiting and stress release, and greatly improving the operational safety of the large drop vertical pipe 21.
[0065] Please see Figure 8In some example embodiments of this disclosure, based on the aforementioned scheme, the kinetic energy conversion component 5 includes a sealed cavity 51, a rotating wheel assembly 52 and a drive shaft 53. One end of the drive shaft 53 is rigidly connected to the rotating wheel assembly 52, and the other end is connected to the input end of the power generation component 6. The pipe outlet 23 is provided with a cluster nozzle 24 to spray hot salt to impact the rotating wheel assembly 52 to rotate, thereby driving the power generation component 6 to generate electricity.
[0066] One end of the drive shaft 53 is rigidly connected to the wheel assembly 52, and the other end is driven to the input end of the power generation component 6. The rigid connection is a welded or integrally formed structure with no relative displacement, ensuring stable transmission and no energy loss under high temperature conditions. The sealing cavity 51 is a closed cavity that can prevent the leakage of high-temperature molten salt and also plays a role in heat preservation, reducing the temperature drop of molten salt. The cluster nozzle 24 can accelerate the rectified molten salt to form a stable high-speed jet, which tangentially impacts the rotation of the wheel assembly 52, converting the kinetic energy of the molten salt into rotational mechanical energy, thereby driving the power generation component 6 to generate electricity.
[0067] The rigid transmission structure in this embodiment ensures high efficiency in energy conversion and reduces transmission losses; the sealed cavity 51 structure avoids the major safety risks of high-temperature molten salt leakage and reduces heat loss from molten salt; the combination of the cluster nozzle 24 and the rotor realizes the efficient conversion of molten salt kinetic energy into electrical energy, and at the same time replaces the pressure reduction function of the traditional large differential pressure regulating valve. One structure simultaneously achieves the two core objectives of pressure reduction and energy recovery.
[0068] Please see Figure 8 In some example embodiments of this disclosure, based on the aforementioned scheme, there are multiple pipe outlets 23, or a single pipe outlet 23 is connected to multiple cluster nozzles 24, and the cluster nozzles 24 are arranged in an array around the rotation axis of the rotating wheel assembly 52.
[0069] The design of the multi-nozzle circumferential array allows multiple molten salt jets to simultaneously and tangentially impact the rotor, ensuring uniform circumferential force on the rotor and avoiding problems such as shaft eccentricity, bearing wear, and equipment vibration caused by unilateral impact. At the same time, the molten salt flow rate can be precisely controlled by adjusting the opening of a single nozzle, adapting to the power output adjustment needs under different load conditions of the power plant.
[0070] The multi-nozzle design of the circumferential array achieves uniform force distribution around the rotor, fundamentally reducing problems such as equipment vibration and bearing eccentric wear, and significantly improving power generation efficiency and equipment lifespan. The independent adjustment design of the multi-nozzle allows the system to flexibly adapt to different load conditions of the power station, improving potential energy recovery efficiency and operational stability under all operating conditions.
[0071] In some example embodiments of this disclosure, based on the aforementioned scheme, in the hot salt pipeline assembly 2, each fixed number of alternating vertical pipelines 21 and horizontal pipelines 22 constitute a potential energy recovery unit, or after the hot salt descends vertically for a fixed height, a corresponding set of kinetic energy conversion components 5 and power generation components 6 are set at the corresponding end of the horizontal pipeline 22; the pipeline outlet 23 is formed at the downstream end of the corresponding horizontal pipeline 22, and the salt outlet of the kinetic energy conversion component 5 is connected to the next set of vertical pipelines 21.
[0072] This design is a modular cascade potential energy recovery scheme that breaks down a large drop of hundreds of meters into multiple small drop units. Each unit completes a "potential energy-kinetic energy-electrical energy" conversion once, avoiding the problems of excessive molten salt flow rate, excessive equipment pressure, and severe scouring and wear caused by a single large drop. At the same time, it can be flexibly adapted to projects with different tower heights and different installed capacities.
[0073] In a specific scenario, the 220m high heat absorption tower is divided into four 55m potential energy recovery units. Each unit is equipped with a set of kinetic energy conversion components 5 and power generation components 6 to achieve cascaded energy recovery.
[0074] The tiered modular design significantly reduces the pressure requirements and erosion wear of individual equipment, making equipment selection simpler and operation and maintenance more convenient; it can be flexibly adapted to solar thermal power plants with different tower heights and different installed capacities, thus expanding its application range; the failure of a single equipment will not affect the continuous operation of the entire system, greatly improving the system's operational redundancy and reliability.
[0075] In some alternative embodiments of this disclosure, a waste heat recovery unit is added based on the foregoing scheme to recover the heat energy lost during the descent of the molten salt.
[0076] The waste heat recovery unit has a segmented structure, correspondingly fitted onto the outer walls of each section of the vertical pipe 21 and horizontal pipe 22 of the hot salt pipe assembly 2. It includes a sealed heat exchange jacket, a circulating heat exchange medium, and an Organic Rankine Cycle (ORC) power generation system. The sealed heat exchange jacket is an annular sealed cavity, forming a closed heat exchange channel with the outer wall of the pipe. The circulating heat exchange medium is high-temperature resistant heat transfer oil, which circulates within the heat exchange channel, absorbing the heat lost from the molten salt in the pipe to the environment. The heated heat transfer oil enters the evaporator of the ORC power generation system, heating the organic working fluid to form high-pressure steam, which drives the turbine to rotate and generate electricity. The cooled heat transfer oil is then returned to the heat exchange jacket by a circulating pump, completing the closed-loop cycle.
[0077] This embodiment realizes the efficient recovery of heat dissipation loss during the descent of molten salt, can recover more than 30% of the heat energy in the molten salt heat dissipation loss and convert it into electric energy, forms a synergy with the kinetic energy recovery system, further improves the comprehensive energy utilization rate of the system, solves the problem of complete waste of molten salt heat dissipation loss in the prior art, maximally explores the energy value of the whole process of molten salt, and further reduces the station's auxiliary power consumption rate.
[0078] Please refer to Figures 1 to 11 , in some optional embodiments of the present disclosure, based on the foregoing solution, a dedicated grid connection control system is set up to connect the power generation component 6 supporting the kinetic energy conversion component 5, the power generation system of the waste heat recovery unit, with the power supply circuit of the cold salt pump of the power station and the power supply circuit of the power grid in parallel. During the startup stage of the power station, the heat absorber has not reached the working temperature, the hot salt flow rate is zero, the power generation component 6 has no power output, and the cold salt pump is completely powered by the power grid to lift the cold molten salt to the tower top heat absorber; as the heat absorber gradually warms up, the hot salt begins to descend along the pipeline, the power generation component 6 begins to output electric energy, and the grid connection control system preferentially supplies the recovered electric energy to the cold salt pump. As the load of the heat absorber increases and the hot salt flow rate increases, the output power of the power generation component 6 gradually increases, and at the same time, the power taken from the power grid by the cold salt pump is gradually reduced; when the heat absorber reaches the rated load and the hot salt flow rate reaches the rated value, the output power of the power generation component 6 can cover 60%-80% of the rated power consumption of the cold salt pump.
[0079] This embodiment realizes the in-situ consumption of the electric energy recovered from potential energy, reduces the power transmission and distribution loss of electric energy, fundamentally reduces the power taken from the power grid by the maximum power consumption load (cold salt pump) of the solar thermal power station, and greatly reduces the station's auxiliary power consumption rate; at the same time, the recovered electric energy can be used as the backup power supply of the cold salt pump to ensure the continuous operation of the cold salt pump under sudden working conditions such as power grid fluctuations and power outages, avoid major accidents of cold salt stagnation and solidification, and greatly improve the anti-risk ability and safety of the power station operation.
[0080] In a specific application scenario, specifically for the commercial application scenario of a 100MW tower-type molten salt solar thermal power station, the height of the heat absorption tower of this project is 220m, the rated flow rate of hot salt is 1800t / h, the rated temperature of hot salt is 565°C, and the original design uses 3 groups of large pressure difference regulating valves without a potential energy recovery device, resulting in problems such as easy damage of valve parts, high operation and maintenance costs, and serious energy waste.
[0081] After adopting the device of the present disclosure, the 220m drop is divided into 4 potential energy recovery units of 55m each. Each unit is correspondingly provided with a set of kinetic energy conversion component 5 and power generation component 6. The rated output power of a single set of power generation component 6 is 450KW, and the total rated output power of 4 groups is 1800KW; a waste heat recovery unit is synchronously supported, with a rated output power of 200KW, and the total recovery power of the system is 2000KW.
[0082] Actual operation data of the project shows that the annual equivalent full-load operating hours are 3000 hours, the annual energy recovery is 7.5 million kWh, the power plant's electricity price is 0.55 yuan / kWh, resulting in annual electricity cost savings of 4.1 million yuan; the original annual maintenance and replacement cost of the regulating valve group was approximately 800,000 yuan, but after adopting this device, the regulating valve group was eliminated, reducing the annual maintenance cost to 150,000 yuan, resulting in annual maintenance cost savings of 650,000 yuan; the total annual direct economic benefit is 4.75 million yuan. At the same time, the power plant's power consumption rate decreased from the original design of 8.2% to 5.8%, and the annual additional on-grid electricity volume is approximately 12 million kWh, significantly improving the overall project profitability.
[0083] The successful implementation of this commercial project has validated the engineering and economic feasibility of the proposed solution. It has not only achieved significant energy conservation and cost reduction, greatly shortened the investment payback period, but also increased the power generation capacity of the power plant by reducing the plant's power consumption rate, thus achieving a double improvement in project revenue. It has set a benchmark effect in similar projects and possesses strong commercial promotion value and market competitiveness.
[0084] For example, a heat absorption tower liquid hot molten salt potential energy recovery device is provided, including hot salt pipeline assembly 2, cold salt pipeline assembly 7, first support assembly 3, second support assembly 4, pipeline limiting assembly 8, kinetic energy conversion assembly 5, power generation assembly 6, and matching through-layer support structure 9.
[0085] Both the hot salt pipeline assembly 2 and the cold salt pipeline assembly 7 adopt an alternating series arrangement of multiple sets of vertical pipelines 21 and horizontal pipelines 22. The pipelines are equipped with outer ring pipe clamps 81, which are two symmetrical semi-circular pipe clamps that are fixed to the outer wall of the pipeline by through bolts, serving as a transitional connection between the pipeline and the supporting structure. The hot salt pipeline assembly 2 and its corresponding support are made of 347H stainless steel, while the cold salt pipeline assembly 7 and its corresponding support are made of Q355R steel. The pipe wall thickness increases as the installation height decreases, with the thickest pipe wall at the bottom of the tower, followed by the middle section, and the thinnest at the top.
[0086] The first support component 3 is a vertical fixed support connector for the pipeline, including a cantilever connector 311, a heat insulation pad 312, and connecting bolts 313. Four cantilever connectors 311 are symmetrically arranged circumferentially along the pipeline. One end of each cantilever connector 311 is an arc-shaped connecting plate with the same curvature as the pipeline, welded to the outer wall of the pipeline. The other end is fixed to the horizontal steel beam 111 of the tower 1 via connecting bolts 313. The heat insulation pad 312 is placed between the cantilever connector 311 and the steel beam. The heat insulation pad 312 is made of high-strength calcium silicate board with a heat resistance temperature of not less than 600℃, a thermal conductivity of not more than 0.055W / (m・K), and a compressive strength of not less than 3MPa. The thickness of the heat insulation pad 312 is 50mm for cold salt pipelines and 80mm for hot salt pipelines. This structure can restrict the horizontal and vertical displacement of the pipeline, achieving rigid fixation of the pipeline.
[0087] The second support component 4 is a horizontal limiting support connector for the pipeline, including horizontal limiting rods (lifting components), U-shaped supports 82, and a horizontal crossbeam (support platform). The upper ends of the two horizontal limiting rods are welded to the lower flange of the steel beam via double-eared lifting plates, and the lower ends are fixed to the horizontal crossbeam. The U-shaped supports 82 are fixed to the upper surface of the crossbeam, and the upper end is welded to the outer ring pipe clamp 81 of the pipeline. This structure can limit the vertical displacement of the pipeline while allowing limited thermal deformation of the pipeline in the horizontal direction, releasing pipeline stress and achieving flexible lifting constraints.
[0088] The pipeline limiting assembly 8 is a vertical limiting support connector for the pipeline, including an outer ring pipeline clamp 81, a U-shaped support 82, and a limiting connecting plate 83. Two sets of outer ring pipeline clamps 81 are installed vertically along the pipeline and welded to the U-shaped support 82. The end plate of the limiting connecting plate 83 is parallel to the bottom plate of the U-shaped support 82, with a 5-10mm limiting gap between them. The limiting connecting plate 83 is fixed to the steel beam of the tower 1. This structure can control the lateral displacement of the pipeline within a safe range and simultaneously release the axial thermal deformation of the pipeline.
[0089] The kinetic energy conversion component 5 adopts a circular bucket-shaped impulse turbine, which is located at the downstream end of the horizontal pipe 22. The turbine has an inner and outer double chamber structure. The inner chamber is the molten salt flow and energy conversion cavity, including the runner assembly 52, the cluster nozzle 24, the deflector structure, and the salt discharge pipe 54. The space between the outer and inner chambers is filled with aluminum silicate or rock wool insulation material. The runner assembly 52 is fixed by a rigid bearing and rigidly connected to the drive shaft 53. The drive shaft 53 extends out of the cavity and is connected to the power generation component 6. The cluster nozzle 24 is located at the turbine inlet and communicates with the pipe outlet 23. The drive end of the deflector structure is located outside the cavity and is used to adjust the flow rate and direction of the molten salt jet to control the turbine output. The salt discharge pipe 54 at the bottom of the inner chamber is connected to the next set of vertical pipes 21.
[0090] The turbine is fixed to the tower platform by a layered support structure 9. The support structure is generally cylindrical and includes upper reinforcing columns 91, middle reinforcing columns 92, outer reinforcing main beams 93, outer reinforcing secondary beams 94, top reinforcing members 95, and irregularly shaped combined connecting beams 96. The upper reinforcing columns 91 and middle reinforcing columns 92 are arranged at equal intervals along the circumference of the turbine, while the outer reinforcing main beams 93 and secondary beams are arranged at equal intervals along the outer wall of the turbine and are welded to the reinforcing columns. The top reinforcing members 95 are located on the top of the turbine and have flange connecting plates for connection with pipes, and are equipped with vent holes and vent valves. The irregularly shaped combined connecting beams 96 are located at the diameter change of the turbine and are made of two layers of H-beams welded together, with vertical and horizontal stiffening ribs to alleviate molten salt impact and equipment resonance.
[0091] Cold salt is lifted to the top of the tower by the cold salt pipeline assembly 7, heated into hot molten salt, and then enters the hot salt pipeline assembly 2. It falls step by step through alternating vertical pipes 21 and horizontal pipes 22. Each pipeline unit completes the conversion of potential energy into kinetic energy and the rectification of the flow field. Then it enters the water turbine. The molten salt impacts the turbine and drives the power generation assembly 6 to generate electricity, realizing the conversion of potential energy into electrical energy. The recovered electrical energy can be directly supplied to the cold salt lift pump to realize energy transfer and reduce plant power consumption.
[0092] Through integrated optimization of the entire system, the entire process of pipeline support, energy recovery, and safety protection is coordinated. The rigid-flexible cross-support system takes into account both the fixed constraints of the pipeline and the release of thermal deformation, fundamentally solving the problems of stress concentration and vibration runaway in high-temperature pipelines with large drops. The double-chamber circular bucket turbine is perfectly adapted to high-temperature molten salt working conditions, and the through-layer support structure effectively alleviates molten salt impact and equipment resonance, realizing efficient mutual conduction of molten salt gravitational potential energy and electrical energy. It completely replaces the traditional large differential pressure regulating valve, significantly saving engineering costs and operation and maintenance costs, while maximizing the recovery of molten salt potential energy and reducing the power plant's power consumption rate. It has excellent engineering practicality, safety, and economy in the field of tower solar thermal power generation.
[0093] While this disclosure has been detailed and described in the accompanying drawings and the foregoing description, such description is to be considered illustrative or exemplary, and not restrictive, and this disclosure is not limited to the disclosed embodiments. Based on a study of the drawings, the disclosure, and the appended claims, those skilled in the art will understand and implement other embodiments and variations in carrying out the claimed invention. New embodiments can be obtained by combining any of the foregoing teachings.
[0094] The above embodiments are merely illustrative of the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure, and they should all be covered within the scope of the claims and specification of this disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A device for recovering the potential energy of liquid molten salt in a heat absorption tower, characterized in that, include: A tower, the top of which is equipped with a heat absorber, the tower comprising a frame-type steel frame structure, the steel frame structure comprising horizontal steel beams and vertical steel beams; A hot salt pipeline assembly, installed inside the tower, is used to transport hot salt and includes multiple sets of one-to-one vertical and horizontal pipelines, with the vertical and horizontal pipelines arranged alternately. The first support assembly includes a plurality of first support members, which are fixedly connected to the steel frame structure and fixedly connected to the vertical pipe on the side facing away from the steel frame structure. The plurality of first support members are arranged in an array around the periphery of the vertical pipe on the same horizontal plane. The second support assembly includes a hoisting structure and a connecting structure. The hoisting structure includes a hoisting component and a support platform. The connecting structure includes a second support component, which is fitted around the periphery of the horizontal pipe and fixedly connected to the upper surface of the support platform. The hoisting component is connected between the support platform and the horizontal steel beam. A kinetic energy conversion component and a power generation component are provided, both of which are mounted on the tower, and the output end of the kinetic energy conversion component is connected to the input end of the power generation component. The hot salt pipeline assembly has at least one pipeline outlet in the vertical direction. The jet direction of the pipeline outlet corresponds to the tangential direction of the rotor of the kinetic energy conversion assembly. The hot salt impact drives the kinetic energy conversion assembly to operate, thereby driving the power generation assembly to generate electricity.
2. The heat recovery device for liquid molten salt in a heat absorption tower according to claim 1, characterized in that, The wall thickness of the vertical and horizontal pipes is negatively correlated with the height of the pipes.
3. The heat recovery device for liquid molten salt in a heat absorption tower according to claim 1, characterized in that, It also includes a cold salt pipe assembly, which includes a cold salt pipe and adopts the same arrangement as the hot salt pipe assembly. The outside of the cold salt pipe is provided with a first support assembly and a second support assembly. The cold salt pipe and its matching first and second support components are made of the same material. The hot salt pipe and its matching first and second support components are made of the same material. However, the cold salt pipe assembly and the hot salt pipe assembly are made of different materials.
4. The heat recovery device for liquid molten salt in a heat absorption tower according to claim 1, characterized in that, The first support includes a cantilever connector, a heat insulation pad, and connecting bolts. One end of the cantilever connector is an arc-shaped connecting plate with the same curvature as the vertical pipe. The other end of the cantilever connector is arranged along the axis perpendicular to the arc-shaped connecting plate and is fixedly connected to the horizontal steel beam by the connecting bolts. The heat insulation pad is disposed between the horizontal steel beam and the cantilever connector.
5. The heat recovery device for liquid molten salt in a heat absorption tower according to claim 4, characterized in that, The heat insulation pad is made of calcium silicate material, with a heat resistance temperature greater than or equal to 600℃, a thermal conductivity less than or equal to 0.055W / (m・K), and a compressive strength greater than or equal to 3MPa.
6. The heat recovery device for liquid molten salt in a heat absorption tower according to claim 1, characterized in that, The lifting components are at least two in number and are arranged horizontally, with the two lifting components positioned perpendicular to the extension direction of the horizontal pipe.
7. The heat recovery device for liquid molten salt in a heat absorption tower according to claim 1, characterized in that, It also includes a pipe limiting assembly, which is disposed at both ends of the vertical pipe and fixedly connected to the steel frame structure. The pipe limiting assembly includes two sets of symmetrically arranged outer ring pipe clamps, U-shaped supports, and limiting connecting plates. The outer ring pipe clamps are semi-circular arc clamps with the same curvature as the vertical pipe. The radial outer side of the outer ring pipe clamps is fixedly connected to the U-shaped supports. The limiting connecting plate includes two vertical plates and a vertical end plate. The vertical plates are fixedly connected to the steel frame structure, and the vertical end plate is welded and fixed to the two vertical plates. The vertical end plate is parallel to the bottom plate of the U-shaped support.
8. The heat recovery device for liquid molten salt in a heat absorption tower according to claim 1, characterized in that, The kinetic energy conversion component includes a sealed cavity, a rotating wheel assembly, and a drive shaft. One end of the drive shaft is rigidly connected to the rotating wheel assembly, and the other end is connected to the input end of the power generation component. The pipe outlet is provided with a cluster nozzle to spray hot salt to impact the rotating wheel assembly to rotate, thereby driving the power generation component to generate electricity.
9. The heat recovery device for liquid molten salt in a heat absorption tower according to claim 8, characterized in that, The pipe outlet may be multiple, or a single pipe outlet may be connected to multiple cluster nozzles, and the cluster nozzles may be arranged in an array around the rotation axis of the rotary wheel assembly.
10. The heat recovery device for liquid molten salt in a heat absorption tower according to claim 1, characterized in that, In the hot salt pipeline assembly, each fixed number of alternating vertical and horizontal pipelines form a potential energy recovery unit, or after the hot salt descends vertically to a fixed height, a corresponding kinetic energy conversion component and power generation component are installed at the corresponding end of the horizontal pipeline; the pipeline outlet is formed at the downstream end of the corresponding horizontal pipeline, and the salt outlet of the kinetic energy conversion component is connected to the next set of vertical pipelines.