Evaporator device of fused salt energy storage system

Abstract

The invention relates to the technical field of heat storage equipment, in particular to an evaporator device of a fused salt energy storage system.The evaporator device comprises a shell, a flow guide base is fixedly connected to one side of the shell, a plurality of telescopic heat exchange pipes are fixedly connected to the flow guide base in an annular structure, and stirring mechanisms are fixedly connected to the interiors of the telescopic heat exchange pipes; a plurality of telescopic heat exchange pipes are arranged on the flow guide seat, a backflow seat is rotatably connected between the other ends of the telescopic heat exchange pipes, a plurality of transmission mechanisms are fixedly connected to the backflow seat, a transmission ring is rotatably connected to the outer side of the flow guide seat, and a driving seat is fixedly arranged on the outer side of the flow guide seat. The heat exchange area can be automatically adjusted according to heat requirements and thermal characteristics and flow velocity requirements of different fluids, and when more heat is required to be transferred, the telescopic heat exchange pipe can extend to increase the contact area with a fluid medium; and when the heat requirement is low, the telescopic heat exchange pipe shrinks, the heat exchange surface is reduced, and therefore the heat exchange efficiency is effectively adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat storage equipment, in particular to an evaporator device of a molten salt energy storage system. BACKGROUND

[0002] A molten salt energy storage system typically stores thermal energy from solar or other heat sources in molten salt. When power generation is needed, the molten salt is transported to an evaporator to release its stored heat. These high-temperature molten salts pass through a heat exchanger to heat water, converting it into high-temperature, high-pressure steam, which in turn drives a turbine to generate electricity. The role of the evaporator is to efficiently exchange heat, allowing the thermal energy of the molten salt to be effectively transferred to the water. The evaporator in a molten salt energy storage system is one of the key components, mainly used to transfer the thermal energy stored in the molten salt to water or other fluids, generating steam to drive a steam turbine to generate electricity.

[0003] The prior art document with publication number CN217979956U provides a lying hair clip type evaporator for a molten salt energy storage system, which adopts a "U" shaped hair clip style as a whole. The high-temperature section and the low-temperature section are arranged separately, and independent tube sheets are provided respectively. Compared with the prior art, without reducing the original heat exchange efficiency of the evaporator, the tube sheet temperature difference can be prevented from being too large, the influence of the temperature difference stress on the strength of the tube sheet is reduced, and the service life of the evaporator is improved.

[0004] The prior art sets U-shaped heat exchange tubes as molten salt flow pipes. The curved part of the U-shaped tube may cause uneven flow of molten salt, local flow rate changes, especially near the elbow, which may produce a stagnation area, affecting the overall heat exchange efficiency. Meanwhile, the size of the U-shaped tube is fixed, which is not suitable for optimal heat transfer conditions under different working fluid flow rates.

[0005] In summary, in the prior art, there is a lack of technology for using scalable heat exchange tubes as molten salt flow pipes in a molten salt energy storage system. SUMMARY

[0006] The purpose of the present application is to solve the shortcomings in the background art and provide an evaporator device of a molten salt energy storage system.

[0007] To achieve the above purpose, the technical solution adopted by the present application is as follows: an evaporator device of a molten salt energy storage system, comprising an outer shell, a flow guide seat is fixedly connected on one side of the outer shell, a plurality of telescopic heat exchange pipes are fixedly connected in a ring structure on the flow guide seat, an agitating mechanism is fixedly connected in the telescopic heat exchange pipes, a reflux seat is rotatably connected between the other ends of the plurality of telescopic heat exchange pipes, a plurality of transmission mechanisms are fixedly connected on the reflux seat, a transmission ring is rotatably connected outside the flow guide seat, and a drive seat is fixedly installed outside the flow guide seat.

[0008] Preferably, the flow guide seat is provided with a limiting ring groove outside, and a fixed discharge pipe is fixedly and connectedly arranged in the middle of the flow guide seat.

[0009] Preferably, the telescopic heat exchange pipe is composed of a fixed pipe and a movable pipe, one end of the fixed pipe is fixedly and connectively arranged through the inner wall of the flow guide seat, the other end of the fixed pipe is fixedly and connectively arranged with the outer wall of the movable pipe through screwing, one end of the movable pipe in the reflux seat is fixedly and connectively arranged with a tooth ring.

[0010] Preferably, the stirring mechanism comprises a fixed shaft, the fixed shaft is fixedly and connectively arranged with the inner wall of the movable pipe, a plurality of extrusion grooves are arranged on the fixed shaft, a transmission shaft is slidingly and connectively arranged in the middle of the fixed shaft, an extrusion block is fixedly and connectively arranged on the transmission shaft, the other end of the transmission shaft extends to the outside through the inner wall of the reflux seat, and one end of the transmission shaft outside is fixedly and connectively arranged with a slotted disc.

[0011] Preferably, the reflux seat is fixedly and connectively arranged with a motor on one side of the inner wall, the motor output end is fixedly and connectively arranged with a tooth disc, the tooth disc is meshingly and connectively arranged with the tooth ring, the reflux seat is fixedly and connectively arranged with a movable discharge pipe on one side, and the movable discharge pipe is slidingly and connectively arranged with the inner wall of the fixed discharge pipe.

[0012] Preferably, the transmission mechanism comprises a fixed seat, a rotating shaft is rotatably and connectively arranged through the fixed seat, one end of the rotating shaft is fixedly and connectively arranged with a sleeve rod, the other end of the sleeve rod is slidingly and connectively arranged with a sleeve pipe, the sleeve pipe is rotatably and connectively arranged with the flow guide seat, and the outer end of the sleeve pipe is fixedly and connectively arranged with a driven wheel.

[0013] Preferably, the other end of the rotating shaft is fixedly and connectively arranged with a transmission column, an annular inclined groove is arranged on the transmission column, a push rod is slidingly and connectively arranged in the inner wall of the annular inclined groove, the bottom end of the push rod is slidingly and connectively arranged with the inner wall of the slotted disc, a limiting rod is fixedly and connectively arranged on the fixed seat, and the outer wall of the limiting rod is slidingly and connectively arranged with the push rod.

[0014] Preferably, one side of the transmission ring is fixedly and connectively arranged with a connecting ring, the connecting ring is rotatably and connectively arranged with the inner wall of the limiting ring groove, an annular rack A is fixedly and connectively arranged at the outer circle of the transmission ring, the annular rack A is meshingly and connectively arranged with the driven wheel, and an annular rack B is fixedly and connectively arranged at the inner circle of the transmission ring.

[0015] Preferably, one side of the drive seat is provided with an input pipe through fixed connection, the other side of the drive seat is provided with an output pipe through fixed connection, the output pipe is communicated with the inner wall of the flow guide seat, the inner wall of the drive seat is provided with an impeller through rotating connection, one end of the impeller extends to the outside through the inner wall of the drive seat and is provided with a driving wheel through fixed connection, and the driving wheel is in meshing transmission with the ring gear B.

[0016] Compared with the prior art, the present application has the following beneficial effects: 1. By setting the telescopic heat exchange pipe, under the action of the toothed disc, multiple telescopic heat exchange pipes can be simultaneously telescoped, the heat exchange area can be automatically adjusted according to the heat demand and the thermal characteristics and flow rate demand of different fluids, when more heat transfer is needed, the telescopic heat exchange pipe can be stretched to increase the contact area with the fluid medium, and when the heat demand is low, the telescopic heat exchange pipe is contracted to reduce the heat exchange surface, thereby effectively adjusting the heat exchange efficiency. 2. By setting the stirring mechanism in the telescopic heat exchange pipe, the molten salt entering the extrusion groove can be extruded by the reciprocating extrusion block, the molten salt is stirred, the stirring of the molten salt helps to uniformly distribute the temperature during the flow of the molten salt, the heat exchange process is more efficient by avoiding areas with too large temperature difference, and more heat energy can be converted into steam or other energy sources. 3. By setting the drive seat and the transmission mechanism, the molten salt pumped can drive the impeller to rotate, the impeller can drive the stirring mechanism through the transmission mechanism to stir the molten salt in the telescopic heat exchange pipe, without relying on external power as driving force, not only saving energy and reducing operating costs, but also simplifying the system structure, improving the stability, heat exchange efficiency and reliability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the evaporator device of the molten salt energy storage system of the present application; Figure 2 It is a whole structure partial cross-sectional view schematic view of the evaporator device of the molten salt energy storage system of the present application; Figure 3 It is a flow guide seat and transmission ring structure partial cross-sectional view schematic view of the evaporator device of the molten salt energy storage system of the present application; Figure 4 It is a telescopic heat exchange pipe structure schematic view of the evaporator device of the molten salt energy storage system of the present application; Figure 5 It is a stirring mechanism structure schematic view of the evaporator device of the molten salt energy storage system of the present application; Figure 6 It is a backflow seat and other structure partial cross-sectional view schematic view of the evaporator device of the molten salt energy storage system of the present application; Figure 7 This is a schematic diagram of the transmission mechanism of the evaporator device in a molten salt energy storage system according to the present invention; Figure 8 This is a partial cross-sectional schematic diagram of the drive seat structure of the evaporator device of the molten salt energy storage system of the present invention.

[0018] The following are labeled in the diagram: 1. Outer shell; 2. Flow guide seat; 3. Telescopic heat exchange tube; 4. Agitation mechanism; 5. Return seat; 6. Transmission mechanism; 7. Transmission ring; 8. Drive seat; 201. Limiting ring groove; 202. Fixed discharge pipe; 301. Fixed pipe; 302. Movable pipe; 303. Toothed ring; 401. Fixed shaft; 402. Extrusion groove; 403. Transmission shaft; 404. Extrusion block; 405. Grooved disc; 501. Motor; 502. Gear disc; 503. Movable discharge pipe; 601. Fixed base; 602. Rotating shaft; 603. Sleeve rod; 604. Sleeve tube; 605. Driven wheel; 606. Transmission column; 607. Annular inclined groove; 608. Push rod; 609. Limiting rod; 701. Connecting ring; 702. Annular rack A; 703. Annular rack B; 801. Impeller; 802. Driving wheel; 803. Input pipe; 804. Output pipe. Detailed Implementation

[0019] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0020] like Figures 1-8 The evaporator device of the molten salt energy storage system shown includes a shell 1. A flow guide seat 2 is fixedly connected to one side of the shell 1. Multiple telescopic heat exchange tubes 3 are fixedly connected to the flow guide seat 2 in a ring structure. An agitation mechanism 4 is fixedly connected inside the telescopic heat exchange tubes 3. A return seat 5 is rotatably connected between the other ends of the multiple telescopic heat exchange tubes 3. Multiple transmission mechanisms 6 are fixedly connected to the return seat 5. A transmission ring 7 is rotatably connected to the outside of the flow guide seat 2. A drive seat 8 is fixedly installed on the outside of the flow guide seat 2.

[0021] like Figure 3 As shown, a limiting annular groove 201 is provided on the outer side of the flow guide seat 2, and a fixed discharge pipe 202 is fixedly connected through the middle of the flow guide seat 2.

[0022] like Figure 4As shown, the telescopic heat exchange pipe 3 is composed of two parts: a fixed pipe 301 and a movable pipe 302. The fixed pipe 301 is fixedly connected to the inner wall of the flow guide seat 2 at one end, and is threadedly connected to the outer wall of the movable pipe 302 at the other end. The movable pipe 302 is rotatably connected to the inner wall of the return flow seat 5 at the other end, and one end of the movable pipe 302 located inside the return flow seat 5 is fixedly connected with a tooth ring 303. The internal threads of the fixed pipe 301 have obvious advantages for molten salt, mainly in enhancing fluid mixing, improving heat exchange efficiency, reducing deposition and crystallization, improving flow stability and fluid dynamics performance, etc. By increasing the inner surface area of the pipe, promoting turbulent flow and heat convection, the internal threads can effectively improve the heat conduction effect of the entire system, while reducing the risk of deposition and crystallization, enhancing the durability and adaptability of the system. The external threads of the movable pipe 302 can significantly improve the turbulent flow and mixing effect of the fluid, increase the contact area between the movable pipe 302 and the fluid, thereby improving the heat transfer efficiency. In addition, the external thread structure helps to prevent deposition and crystallization, stabilize the heat exchange process, reduce the maintenance requirements of the system, and improve the durability and adaptability of the heat exchange system.

[0023] One end of the movable pipe 302 located inside the fixed pipe 301 is provided with an O-ring to form a tight sealing interface. The O-ring can effectively fill the gap between the contact surfaces after compression, preventing leakage of molten salt.

[0024] By setting the telescopic heat exchange pipe 3, under the action of the toothed disc 502, multiple telescopic heat exchange pipes 3 can be simultaneously extended and retracted. The heat exchange area can be automatically adjusted according to the heat demand and the thermal characteristics and flow rate requirements of different fluids. When more heat transfer is required, the telescopic heat exchange pipe 3 can be extended to increase the contact area with the fluid medium. When the heat demand is low, the telescopic heat exchange pipe 3 can be retracted to reduce the heat exchange surface, thereby effectively adjusting the heat exchange efficiency.

[0025] As shown in Figure 5 The stirring mechanism 4 includes a fixed shaft 401 fixedly connected to the inner wall of the movable pipe 302. A plurality of extrusion grooves 402 are formed on the fixed shaft 401. A transmission shaft 403 is slidably fitted through the middle of the fixed shaft 401. An extrusion block 404 is fixedly connected to the transmission shaft 403. The other end of the transmission shaft 403 extends to the outside through the inner wall of the return flow seat 5. A slotted disc 405 is fixedly connected to the end of the transmission shaft 403 located outside. When the push rod 608 moves back and forth, it drives the transmission shaft 403 connected to the slotted disc 405 to move back and forth, causing the transmission shaft 403 to drive the plurality of extrusion blocks 404 to move back and forth, thereby extruding the molten salt entering the extrusion grooves 402, achieving mixing of the molten salt.

[0026] As shown in Figure 6As shown, the inner wall of one side of the reflux seat 5 is fixedly connected with a motor 501, the output end of the motor 501 is fixedly connected with a gear disc 502, the gear disc 502 is in meshing transmission with the gear ring 303, one side of the reflux seat 5 is fixedly connected with a movable discharge pipe 503, and the movable discharge pipe 503 is in sliding fit with the inner wall of the fixed discharge pipe 202. The motor 501 drives the connected gear disc 502 to rotate, so that the gear disc 502 drives the meshing gear ring 303 to rotate, at this time, the gear ring 303 drives the connected movable pipe 302 to rotate, at this time, the movable pipe 302 cooperates with the fixed pipe 301 in threaded connection, so that the telescopic heat exchange pipe 3 can be adjusted in extension and retraction.

[0027] As shown in the figure, Figure 7 The transmission mechanism 6 includes a fixed seat 601, a rotating shaft 602 is rotatably connected through the fixed seat 601, one end of the rotating shaft 602 is fixedly connected with a sleeve rod 603, the other end of the sleeve rod 603 is slidably connected with a sleeve pipe 604, the sleeve pipe 604 is rotatably connected with the flow guide base 2, and the outer end of the sleeve pipe 604 is fixedly connected with a driven wheel 605.

[0028] The other end of the rotating shaft 602 is fixedly connected with a transmission column 606, the transmission column 606 is provided with an annular inclined groove 607, the annular inclined groove 607 is slidably connected with a push rod 608, the bottom end of the push rod 608 is slidably connected with the inner wall of the slotted disc 405, the fixed seat 601 is fixedly connected with a limiting rod 609, and the outer wall of the limiting rod 609 is slidably connected with the push rod 608. The driven wheel 605 can drive the connected sleeve pipe 604 to rotate, and then the sleeve pipe 604 can drive the rotating shaft 602 connected with the sleeve rod 603 to rotate, so that the rotating shaft 602 can drive the connected transmission column 606 to rotate, and the annular inclined groove 607 on the transmission column 606 can drive the push rod 608 to reciprocate.

[0029] As shown in the figure, Figure 3 One side of the transmission ring 7 is fixedly connected with a connecting ring 701, the connecting ring 701 is rotatably connected with the inner wall of the limiting ring groove 201, the outer circle of the transmission ring 7 is fixedly connected with an annular rack A 702, the annular rack A 702 is in meshing transmission with the driven wheel 605, and the inner circle of the transmission ring 7 is fixedly connected with an annular rack B 703.

[0030] As shown in the figure, Figure 8As shown, the drive seat 8 side is provided with an input pipe 803, and the other side is provided with an output pipe 804, which is in communication with the inner wall of the flow guide seat 2. The inner wall of the drive seat 8 is rotatably connected with an impeller 801, one end of which extends to the outside of the drive seat 8 and is fixedly connected with a driving wheel 802, which is in meshing transmission with the ring gear B703. When the flowing molten salt passes through the drive seat 8, the flowing molten salt can drive the impeller 801 to rotate, so that the impeller 801 drives the driving wheel 802 to rotate, and the driving wheel 802 can drive the transmission ring 7 connected with the ring gear B703 to rotate, so that the transmission ring 7 can drive the driven wheel 605 to rotate through the ring gear A702.

[0031] Working principle: when the device is used, the high-temperature molten salt is pumped into the input pipe 803, then into the drive seat 8 through the input pipe 803, and then into the telescopic heat exchange pipe 3 through the output pipe 804, and then into the backflow seat 5, and then the molten salt after heat exchange is discharged through the movable discharge pipe 503 and the fixed discharge pipe 202. When the flowing molten salt passes through the drive seat 8, the flowing molten salt can drive the impeller 801 to rotate, so that the impeller 801 drives the driving wheel 802 to rotate, and the driving wheel 802 can drive the transmission ring 7 connected with the ring gear B703 to rotate, so that the transmission ring 7 can drive the driven wheel 605 to rotate through the ring gear A702. So that the driven wheel 605 can drive the connected sleeve 604 to rotate, and then the sleeve 604 can drive the shaft 602 connected with the sleeve rod 603 to rotate, so that the shaft 602 can drive the transmission column 606 connected with it to rotate, so that the ring-shaped inclined groove 607 on the transmission column 606 can drive the push rod 608 to move back and forth. When the push rod 608 moves back and forth, it will drive the transmission shaft 403 connected with the slotted disc 405 to move back and forth, so that the transmission shaft 403 drives the plurality of extrusion blocks 404 to move back and forth, so as to extrude the molten salt entering the extrusion groove 402, realizing the mixing of the molten salt and ensuring the heat exchange efficiency. When adjusting the heat exchange area according to the heat demand and the heat characteristics and flow rate demand of different fluids, the motor 501 drives the connected tooth disc 502 to rotate, so that the tooth disc 502 drives the meshing tooth ring 303 to rotate, and at the same time, the tooth ring 303 drives the connected movable pipe 302 to rotate, and at the same time, the movable pipe 302 cooperates with the threaded fixed pipe 301 to realize the telescopic adjustment of the telescopic heat exchange pipe 3, and the efficient heat exchange efficiency is realized.

[0032] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other present or future devices perform the same function under a different name. It must be noted that, as used in the specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a plurality of such components. In this specification and in the claims, the term "when" should be understood to mean "whereupon" or "upon" when used in contexts describing the sequential order of events, and "whenever" when used in contexts describing the sequential order of events or circumstances. The terms "comprises" and / or "comprising," or "includes" and / or "including" when used in this specification and in the following claims are used open- ended, meaning that they include the elements that follow, but not to the exclusion of other elements. The terms "coupled" and "coupling" mean to be directly or indirectly connected physically or logically, or to be directly or indirectly in communication, whether electrically, mechanically, optically, or otherwise.

[0033] The foregoing description of the preferred embodiment of the application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed. Many modifications and variations are possible in light of this disclosure. It is intended that the scope of the application be limited not with this detailed description, but rather by the claims appended hereto.

Claims

1. An evaporator device for a molten salt energy storage system, comprising a housing (1), characterized in that: A flow guide seat (2) is fixedly connected to one side of the outer shell (1). Multiple telescopic heat exchange tubes (3) are fixedly connected to the flow guide seat (2) in a ring structure. An agitation mechanism (4) is fixedly connected inside the telescopic heat exchange tubes (3). A return seat (5) is rotatably connected between the other ends of the multiple telescopic heat exchange tubes (3). Multiple transmission mechanisms (6) are fixedly connected to the return seat (5). A transmission ring (7) is rotatably connected to the outside of the flow guide seat (2). A drive seat (8) is fixedly installed on the outside of the flow guide seat (2).

2. The evaporator device for a molten salt energy storage system according to claim 1, characterized in that: The guide seat (2) has a limiting annular groove (201) on its outer side, and a fixed discharge pipe (202) is fixedly connected through the middle of the guide seat (2).

3. The evaporator device for a molten salt energy storage system according to claim 2, characterized in that: The telescopic heat exchange tube (3) consists of two parts: a fixed tube (301) and a movable tube (302). One end of the fixed tube (301) is fixedly connected to the inner wall of the flow guide seat (2). The inner wall of the other end of the fixed tube (301) is threadedly connected to the outer wall of the movable tube (302). The other end of the movable tube (302) is rotatably connected to the inner wall of the reflux seat (5). A toothed ring (303) is fixedly connected to one end of the movable tube (302) located inside the reflux seat (5).

4. The evaporator device for a molten salt energy storage system according to claim 3, characterized in that: The stirring mechanism (4) includes a fixed shaft (401), which is fixedly connected to the inner wall of the movable tube (302). The fixed shaft (401) has multiple extrusion grooves (402). A transmission shaft (403) is slidably connected through the middle of the fixed shaft (401). An extrusion block (404) is fixedly connected to the transmission shaft (403). The other end of the transmission shaft (403) extends through the inner wall of the return seat (5) to the outside. A slotted disc (405) is fixedly connected to the outer end of the transmission shaft (403).

5. The evaporator device for a molten salt energy storage system according to claim 4, characterized in that: A motor (501) is fixedly connected to the inner wall of one side of the reflux seat (5). A gear plate (502) is fixedly connected to the output end of the motor (501). The gear plate (502) meshes with the gear ring (303) for transmission. A movable discharge pipe (503) is fixedly connected to one side of the reflux seat (5). The movable discharge pipe (503) slides with the inner wall of the fixed discharge pipe (202).

6. The evaporator device for a molten salt energy storage system according to claim 5, characterized in that: The transmission mechanism (6) includes a fixed base (601), on which a rotating shaft (602) is rotatably connected. A sleeve (603) is fixedly connected to one end of the rotating shaft (602), and a sleeve (604) is slidably fitted to the other end of the sleeve (603). The sleeve (604) is rotatably connected to the guide seat (2), and a driven wheel (605) is fixedly connected to the outer end of the sleeve (604).

7. The evaporator device for a molten salt energy storage system according to claim 6, characterized in that: A transmission column (606) is fixedly connected to the other end of the rotating shaft (602). An annular groove (607) is provided on the transmission column (606). A push rod (608) is slidably fitted on the inner wall of the annular groove (607). The bottom end of the push rod (608) is slidably fitted with the inner wall of the slotted plate (405). A limit rod (609) is fixedly connected to the fixed seat (601). The outer wall of the limit rod (609) is slidably fitted with the push rod (608).

8. The evaporator device for a molten salt energy storage system according to claim 1, characterized in that: A connecting ring (701) is fixedly connected to one side of the transmission ring (7). The connecting ring (701) is rotatably connected to the inner wall of the limiting ring groove (201). An annular rack A (702) is fixedly connected to the outer circle of the transmission ring (7). The annular rack A (702) meshes with the driven wheel (605) for transmission. An annular rack B (703) is fixedly connected to the inner circle of the transmission ring (7).

9. The evaporator device for a molten salt energy storage system according to claim 1, characterized in that: An input pipe (803) is fixedly connected to one side of the drive seat (8), and an output pipe (804) is fixedly connected to the other side of the drive seat (8). The output pipe (804) communicates with the inner wall of the guide seat (2). An impeller (801) is rotatably connected to the inner wall of the drive seat (8). One end of the impeller (801) extends through the inner wall of the drive seat (8) to the outside and is fixedly connected to a drive wheel (802). The drive wheel (802) meshes with the ring rack B (703) for transmission.

Images