A molten salt buffer device

Abstract

The present invention discloses a molten salt buffer device, which includes a buffer device body with a hollow interior. An inlet cavity and an outlet cavity are provided inside the buffer device body. An impact-resistant cover is provided inside the buffer device body, and an impact-resistant part is provided at the top of the impact-resistant cover opposite to the inlet cavity. Through the impact-resistant part of the present invention, when molten salt enters from the inlet cavity of the buffer device body, it first impacts the impact-resistant part, thereby reducing the impact force of the molten salt. It can slow down the pressure without using a serpentine pipeline, increase the service life of the pipeline, and reduce costs.

Description

Technical Field

[0001] The present invention relates to the technical field of solar thermal power generation, and particularly relates to a molten salt buffer device. Background Art

[0002] The heat absorption tower is the core area of a tower-type solar thermal power station. The molten salt pipes contained therein are the key channels to ensure the transmission of molten salt, and their efficient and stable transmission is one of the prerequisite conditions for ensuring the stable operation of the solar thermal power station. However, the currently used molten salt pipes still have certain deficiencies: due to the relatively high drop height, in order to ensure that the descending speed of the molten salt is not too fast and cause damage to the instruments and meters, the serpentine pipe method is often used for layout. The pipe material cost for a pipe with a vertical height of 100 meters will directly generate a cost of tens of millions. Therefore, the setting of the serpentine pipe increases a large amount of pipeline cost; secondly, due to the turbulent flow generated by the high-speed molten salt during the falling process of the molten salt, it will cause wear to the inner wall of the serpentine pipe, and the pipeline needs to be replaced after a certain service time, so it will also increase a large amount of cost.

[0003] For the above reasons, based on the existing molten salt pipes for rising and falling and their layout structures in tower-type solar thermal power stations, the innovative design of the pipe joint structure and anti-corrosion and the optimization of the pipeline layout will have great engineering value. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the background art, and provide a molten salt buffer device, which realizes the pressure reduction and speed reduction of the molten salt at the pipe connection structure, enables the molten salt pipeline system to have an anti-corrosion function, realizes the vertical connection of the descending molten salt pipe, will enhance the application adaptability of the molten salt pipeline and greatly reduce the pipeline cost.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions:

[0006] A molten salt buffer device includes a buffer device body with a hollow interior. An inlet cavity and an outlet cavity are provided in the buffer device body. An impact-resistant cover is provided in the buffer device body. An impact-resistant part is provided at the top of the impact-resistant cover opposite to the inlet cavity. The setting of the impact-resistant part not only weakens the flow rate of the molten salt but also improves the uniformity of the temperature of the molten salt after the molten salt impacts here.

[0007] Through the impact-resistant part of the present invention, the molten salt first impacts the impact-resistant part after entering from the inlet cavity of the buffer device body, thereby reducing the impact force of the molten salt, being able to decelerate and reduce pressure without using a serpentine pipe, increasing the service life of the pipeline, and reducing costs.

[0008] Preferably, the impact-resistant part is a convex surface arched upward, and the convex surface faces the inlet cavity. With the convex surface structure, when receiving the impact force of the molten salt, the impact force can be dispersed.

[0009] The impact-resistant part has a concave surface that is recessed downward. The concave surface faces the inlet cavity. When the vertically descending molten salt impacts the concave surface, the speed of the molten salt can be reduced. At the same time, the refraction of the molten salt and the counteraction of the descending molten salt can also achieve the effect of reducing the speed, thereby protecting the pipeline.

[0010] The impact-resistant part can also adopt a structure with a flat top surface.

[0011] Preferably, a primary buffer cavity and a secondary buffer cavity are further provided inside the buffer device body. The primary buffer cavity and the secondary buffer cavity are sequentially arranged in the direction of the buffer device body from the inlet cavity to the outlet cavity. A partition is provided between the primary buffer cavity and the secondary buffer cavity. A vertical flow channel is opened on the partition. The top of the impact-resistant cover penetrates through the partition and extends into the secondary buffer cavity. The end surface of the open end of the impact-resistant cover is fixedly connected to the bottom of the secondary buffer cavity. The open end of the impact-resistant cover faces the outlet cavity. A transverse through-hole is opened on the side wall of the impact-resistant cover. A tertiary buffer cavity is formed inside the impact-resistant cover. A top flow structure is provided in the tertiary buffer cavity. The top flow structure includes an inner cover body. The inner cover body is arranged in the tertiary buffer cavity. A quaternary buffer cavity is provided inside the inner cover body. The open end of the inner cover body faces the outlet cavity. A through-hole is opened on the top of the inner cover body. The bottom of the inner cover body is designed with a flared opening. The open end of the inner cover body is fixedly connected to the side wall of the outlet cavity.

[0012] A molten salt accumulation cavity is formed between the upper surface of the bottom of the inner cover body with a flared opening design and the side wall of the outlet cavity. The incoming molten salt forms a turbulent flow here, further slowing down the flow speed of the molten salt and further enhancing the uniformity of the molten salt temperature.

[0013] Through the design of the primary buffer cavity, secondary buffer cavity, tertiary buffer cavity, and quaternary buffer cavity, this invention conducts multi-stage buffering; through the transverse through-holes of the impact-resistant cover, the downward flowing molten salt is changed to a horizontal flow, and then through the top flow structure, the molten salt is changed from a horizontal flow to an upward flow, changing the flow direction. By adopting the methods of multi-stage buffering and multi-flow direction change, the effects of decelerating and reducing pressure are remarkable, increasing the service life of the pipeline and reducing costs.

[0014] In this invention, the molten salt vertically entering the third buffer cavity enters the tertiary buffer cavity through the transverse through-hole, thereby changing the flow direction from vertical to horizontal, so as to achieve the purpose of decelerating and reducing pressure.

[0015] Preferably, the inner diameter of the primary buffer cavity gradually increases in the direction from the inlet cavity to the outlet cavity, which can achieve the purpose of decelerating.

[0016] Preferably, a corrosion inhibitor filling structure is provided on the outer side wall of the buffer device body in the primary buffer chamber. The corrosion inhibitor filling structure includes a hollow housing and a corrosion inhibitor. The bottom of the housing is fixedly connected to the side wall of the primary buffer chamber. The corrosion inhibitor is arranged in the inner cavity of the housing. A corrosion inhibitor flow channel is formed on the side wall of the primary buffer chamber. The corrosion inhibitor contains magnesium.

[0017] In the present invention, after the molten salt passes through the first buffer chamber, it enters the housing through the corrosion inhibitor flow channel by means of the corrosion inhibitor. The corrosion inhibitor can carry out oxidation-reduction reactions on the corrosive impurities in the molten salt, adsorb the corrosive impurities on the corrosion inhibitor, remove the corrosive impurities, reduce the corrosiveness of the high-temperature molten salt, and thus reduce the corrosion of the molten salt on the pipe wall.

[0018] A partition plate is arranged in the housing. The partition plate divides the inner cavity of the housing into two corrosion inhibitor placement chambers. The corrosion inhibitor is arranged in the corrosion inhibitor placement chambers. A head is provided at the top to prevent the corrosion inhibitor from falling.

[0019] Preferably, a corrosion inhibitor dropping mechanism is arranged at the top of the housing. An outlet is formed on the side wall of the housing. An automatic sealing switch door is arranged at the outlet. A corrosion inhibitor collection device is arranged on the outer side wall of the secondary buffer chamber.

[0020] In the present invention, the reacted corrosion inhibitor is discharged into the corrosion inhibitor collection device through the outlet by means of the automatic sealing switch door. The new corrosion inhibitor enters the housing through the corrosion inhibitor dropping mechanism, so that the corrosion inhibitor in the housing can be replaced regularly, the ability to remove the corrosive impurities in the molten salt is improved, and thus the service life of the pipeline is prolonged.

[0021] Preferably, the corrosion inhibitor dropping mechanism includes a fixed circular ring plate, an inner side plate, an outer side plate, a rotating gear, a fixed bracket, and a rotating bearing. The rotating bearing is a sealed bearing. The fixed circular ring plate is arranged above the housing and is fixedly connected to the outer side wall of the housing through the fixed bracket. The inner side plate is arranged in the inner ring of the fixed circular ring plate. The outer side plate is arranged in the outer ring of the fixed circular ring plate. A corrosion inhibitor storage cavity is formed between the inner side plate, the outer side plate and the fixed circular ring plate. The rotating gear is arranged below the fixed circular ring plate and is rotatably connected to the fixed circular ring plate through the rotating bearing. A through groove for the primary buffer chamber to pass through is formed in the middle of the rotating gear. Corrosion inhibitor discharge holes are formed from the upper surface to the lower surface of the fixed circular ring plate. The corrosion inhibitor discharge holes are distributed along the circumferential direction of the fixed circular ring plate. Leak holes corresponding to and communicating with the corrosion inhibitor discharge holes are formed in the rotating gear.

[0022] In the present invention, the corrosion inhibitor is stored in the corrosion inhibitor storage cavity. Through the rotation of the rotating gear, when the leakage hole corresponds to the corrosion inhibitor discharge hole, the corrosion inhibitor drops, so that the corrosion inhibitor is evenly spread in the shell, and the corrosion inhibitor is automatically dropped into the shell, enabling the automatic feeding of the corrosion inhibitor without manual addition.

[0023] The rotating gear is a passive gear, which meshes with an active gear. The active gear rotates through a rotating motor, and the motor end of the rotating motor is fixed on the shell.

[0024] Through the rotation of the rotating motor, the active gear is driven to rotate, and then the rotating gear is driven to rotate, realizing automatic rotation.

[0025] Preferably, the automatic sealing switch door includes a cover plate, a left guiding slide rail mechanism, a right guiding slide rail mechanism, an electric push rod, a connecting plate, and a first connecting rod. A sealing ring is provided on the inner side of the cover plate. The cover plate is arranged on the discharge port. The left guiding slide rail mechanism is arranged on the left side of the cover plate, and the right guiding slide rail mechanism is arranged on the right side of the cover plate. The electric push rod is fixedly connected to the side wall of the shell and is located above the middle of the cover plate. The push rod end of the electric push rod is hinged to the first connecting rod, and the other end of the first connecting rod is hinged to the cover plate;

[0026] The left guiding slide rail mechanism includes a guiding slide rail, a fixing plate, a second connecting rod, and a third connecting rod. The guiding slide rail is provided with an L-shaped guiding chute along the length direction. The L-shaped guiding chute includes a horizontal chute and a vertical chute. One end of the second connecting rod is hinged to the top end of the fixing plate, and one end of the third connecting rod is hinged to the bottom end of the fixing plate. The other end of the second connecting rod is hinged to the cover plate and slides in the L-shaped guiding chute. The other end of the second connecting rod is hinged to the cover plate. The structure of the right guiding slide rail mechanism is the same as that of the left guiding slide rail mechanism. The fixing plate of the left guiding slide rail mechanism is connected to the fixing plate of the right guiding slide rail mechanism through a connecting plate, and the connecting plate is fixedly connected to the push rod end of the electric push rod.

[0027] In the present invention, through the telescopic movement of the electric push rod, the fixing plate is driven to slide in the L-shaped guiding chute, so that the second connecting rod undergoes horizontal and vertical displacements in the L-shaped guiding chute, thereby controlling the opening and closing of the discharge port of the cover plate. In this way, the cover plate and the discharge port can be tightly sealed.

[0028] Preferably, the corrosion inhibitor collection device includes two symmetrically distributed semi-cylindrical bodies with open tops. The semi-cylindrical bodies are arranged on the side wall of the buffer device body and have opposite openings. Collection grooves are respectively opened in the semi-cylindrical bodies. First magnets are fixedly connected to the inner side walls of the semi-cylindrical bodies, and second magnets that cooperate with the first magnets are fixedly connected to the outer side wall of the shell.

[0029] In the present invention, two semi - toroidal bodies are fixed within the buffer device body by a first magnet and a second magnet. A collection groove is used to collect the corrosion inhibitor that needs to be drained. The corrosion inhibitor collection device is detachably connected to the buffer device body by the first magnet and the second magnet, facilitating the subsequent treatment of the corrosion inhibitor.

[0030] In summary, the beneficial effects of the present invention are as follows:

[0031] 1. In the present invention, through the impact - resistant part, when the molten salt enters from the inlet cavity of the buffer device body, it first impacts the impact - resistant part, thereby reducing the impact force of the molten salt. Without using a serpentine pipeline, it can slow down the pressure and increase the service life of the pipeline, reducing costs.

[0032] 2. In the present invention, through the design of the first - stage buffer cavity, second - stage buffer cavity, third - stage buffer cavity, and fourth - stage buffer cavity, multi - stage buffering is carried out. Through the horizontal flow holes of the impact - resistant cover, the downward - flowing molten salt is changed to a horizontal flow, and then through the top - flow structure, the molten salt is changed from a horizontal flow to an upward flow, changing the flow direction. Using the method of multi - stage buffering and the idea of multi - flow direction changes, the effect of slowing down the pressure is significant, increasing the service life of the pipeline, and reducing costs.

[0033] 3. In the present invention, through the horizontal flow holes, the molten salt vertically entering the third buffer cavity enters the third - stage buffer cavity through the horizontal flow holes, thereby changing the flow direction from vertical to horizontal, thus achieving the purpose of slowing down the pressure.

[0034] 4. In the present invention, through the flow holes at the top, the molten salt entering the third buffer cavity can only flow into the outlet cavity through the flow holes at the top, further slowing down the pressure.

[0035] 5. The bottom of the inner cover body of the present invention is designed with a flared opening, and the inner diameter of the first - stage buffer cavity gradually increases from the direction of the inlet cavity to the direction of the outlet cavity, which can achieve the purpose of slowing down.

[0036] 6. In the present invention, through the corrosion inhibitor, after the molten salt passes through the first buffer cavity, it enters the shell through the corrosion inhibitor flow channel. The corrosion inhibitor can carry out an oxidation - reduction reaction on the corrosive impurities in the molten salt, adsorb the corrosive impurities on the corrosion inhibitor, remove the corrosive impurities, reduce the corrosiveness of the high - temperature molten salt, and thus reduce the corrosion of the molten salt on the pipe wall.

[0037] 7. In the present invention, the corrosion inhibitor is stored in the corrosion inhibitor storage cavity. Through the rotation of the rotating gear, when the leakage holes correspond to the corrosion inhibitor discharge holes, the corrosion inhibitor drops, thereby evenly spreading the corrosion inhibitor in the shell, automatically dropping the corrosion inhibitor into the shell, enabling the corrosion inhibitor to be automatically fed without manual addition.

[0038] 8. The present invention drives the fixed plate to slide in the L-shaped guide chute through the telescopic movement of the electric push rod, so that the second connecting rod undergoes horizontal and vertical displacements in the L-shaped guide chute, thereby controlling the opening and closing of the discharge port of the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic cross-sectional view of Embodiment 1 of the present invention;

[0040] Figure 2 is a schematic cross-sectional view of Embodiment 2 of the present invention;

[0041] Figure 3 is a bottom view schematic diagram of the corrosion inhibitor falling mechanism of the present invention;

[0042] Figure 4 is a top view schematic diagram of the corrosion inhibitor falling mechanism of the present invention;

[0043] Figure 5 is a three-dimensional schematic diagram of the corrosion inhibitor falling mechanism of the present invention;

[0044] Figure 6 is a schematic diagram of the automatic sealing switch door of the present invention;

[0045] Figure 7 is the present invention Figure 6 an enlarged schematic view of part A;

[0046] Figure 8 is a top view schematic diagram of the automatic sealing switch door of the present invention installed on the housing;

[0047] Figure 9 is a schematic diagram of the guide chute of the automatic sealing switch door of the present invention;

[0048] Figure 10 is a top view schematic diagram of the corrosion inhibitor collection device of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] The following specific embodiments are only explanations of the present invention, and they do not limit the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0050] The present invention will be described in detail below with reference to the accompanying drawings by way of embodiments.

[0051] Embodiment 1

[0052] As Figure 1As shown in the figure, a molten salt buffer device includes a buffer device body 1 with a hollow interior. An inlet cavity 5 and an outlet cavity 14 are provided inside the buffer device body 1. An impact-resistant cover 10 is provided inside the buffer device body 1. The top of the impact-resistant cover 10 opposite to the inlet cavity 5 is provided with an impact-resistant part 101. The impact-resistant part 101 is a convex surface that arches upward, and the convex surface faces the inlet cavity 5. A primary buffer cavity 6 and a secondary buffer cavity 9 are also provided inside the buffer device body 1. The primary buffer cavity 6 and the secondary buffer cavity 9 are sequentially arranged in the direction of the buffer device body 1 from the inlet cavity 5 to the outlet cavity 14. A partition 15 is provided between the primary buffer cavity 6 and the secondary buffer cavity 9. A vertical flow channel 8 is opened on the partition 15. The top of the impact-resistant cover 10 penetrates through the partition 15 and extends into the secondary buffer cavity 9. The end face of the open end of the impact-resistant cover 10 is fixedly connected to the bottom of the secondary buffer cavity 9. The open end of the impact-resistant cover 10 faces the outlet cavity 14. A transverse flow hole 102 is opened on the side wall of the impact-resistant cover 10. A tertiary buffer cavity 11 is formed inside the impact-resistant cover 10. A top flow structure 12 is provided inside the tertiary buffer cavity 11. The top flow structure 12 includes an inner housing 121. The inner housing 121 is provided inside the tertiary buffer cavity 11. A quaternary buffer cavity 13 is provided inside the inner housing 121. The open end of the inner housing 121 faces the outlet cavity 14. A flow hole 122 is opened on the top of the inner housing 121. The bottom of the inner housing 121 is designed with a flared opening. The open end of the inner housing is fixedly connected to the side wall of the outlet cavity 14. A molten salt accumulation cavity 140 is formed between the upper surface of the bottom of the inner housing with a flared opening and the side wall of the outlet cavity. The anti-corrosion function of the pipeline is relatively weak (usually relying on the anti-corrosion property of the metal material itself), and it has low applicability for molten salts with high corrosivity (such as carbonates, chlorides, etc.). It is worth noting that to adapt to the next-generation high-temperature (working temperature exceeding 600 °C) molten salt technology, the ascending and descending molten salt pipes need to enhance the anti-corrosion function and further reduce the pipeline cost. Therefore

[0053] On the outer side wall of the buffer device body 1 located in the primary buffer cavity 6, a corrosion inhibitor filling structure 2 is provided. The corrosion inhibitor filling structure 2 includes a hollow housing 21 and a corrosion inhibitor 22. The bottom of the housing 21 is fixedly connected to the side wall of the primary buffer cavity 6. The corrosion inhibitor 22 is provided inside the cavity of the housing 21. A corrosion inhibitor flow channel 7 is opened on the side wall of the primary buffer cavity 6. A partition plate 23 is provided inside the housing. The partition plate 23 divides the inner cavity of the housing into two corrosion inhibitor placement cavities 231. The corrosion inhibitor 22 is provided in the corrosion inhibitor placement cavity 231. A head 4 is provided at the top of the 21.

[0054] Working principle:

[0055] In use, the high-temperature molten salt enters the oral cavity 5 and then enters the first-stage buffer cavity 6. Due to the action of the flared structure and the impact-resistant part 101 on the upper part of the impact-resistant cover 10, the impact force of the molten salt can be reduced; for the molten salt in the first-stage buffer cavity 6, a part contacts the solid corrosion inhibitor 3 of the corrosion inhibitor filling structure 2, and the partially dissolved corrosion inhibitor will enter the system with the molten salt, playing an anti-corrosion role; the other part passes through the vertical flow channel 8 and enters the second-stage buffer cavity 9, where the flow rate of the molten salt can be further reduced. The molten salt in the second-stage buffer cavity 9 flows horizontally into the third-stage buffer cavity 11 through the horizontal flow holes 102 of the impact-resistant cover 10. Here, the downward flow direction of the molten salt is changed to a horizontal flow. At the same time, since the top-flow structure 12 is located at the center and has an opening at the upper end, the molten salt will change its flow direction twice, that is, from a horizontal flow to an upward flow, and enters the fourth-stage buffer cavity 13 through the opening at the upper end of the top-flow structure 12. Through these several buffering steps, the flow rate of the molten salt is greatly reduced, and the pressure reduction effect is remarkable. The molten salt in the fourth-stage buffer cavity 13 flows into the outlet cavity 14 and finally enters the downcomer. There is a flared design between the fourth-stage buffer cavity 13 and the outlet cavity 14, which serves the purpose of deceleration. Therefore, the deceleration and pressure reduction effects are remarkable, increasing the service life of the pipeline and reducing costs.

[0056] Example 2

[0057] As Figure 2 shown, different from Example 1, a corrosion inhibitor dropping mechanism 20 is provided at the top of the housing 21. A discharge port 211 is provided on the side wall of the housing 21. There can be multiple discharge ports 211, and each discharge port is provided with an automatic sealing switch door 24. An automatic sealing switch door 24 is provided on the discharge port 211, and a corrosion inhibitor collection device 25 is provided on the outer side wall of the second-stage buffer cavity 9. At this time, the corrosion inhibitor dropping mechanism 20 as a whole is a circular structure.

[0058] As Figures 3 - 5As shown, the corrosion inhibitor dropping mechanism 20 includes a fixed circular ring plate 201, an inner side plate 202, an outer side plate 203, a rotating gear 204, a fixed bracket 205, and a rotating bearing 207. The fixed circular ring plate 201 is arranged above the housing 21 and is fixedly connected to the outer side wall of the housing 21 through the fixed bracket 205. The inner side plate 202 is arranged in the inner circle of the fixed circular ring plate 201, and the outer side plate 203 is arranged in the outer circle of the fixed circular ring plate 201. A corrosion inhibitor storage cavity 206 is formed between the inner side plate 202, the outer side plate 203, and the fixed circular ring plate 201. The rotating gear 204 is arranged below the fixed circular ring plate 201 and is rotatably connected to the fixed circular ring plate 201 through the rotating bearing 207. A through groove 208 is formed in the middle of the rotating gear 204 to facilitate the passage of the first-stage buffer cavity 6. A corrosion inhibitor discharge hole 209 is formed from the upper surface to the lower surface of the fixed circular ring plate 201. The corrosion inhibitor discharge holes 209 are distributed along the circumferential direction of the fixed circular ring plate 201. Leak holes 210 corresponding to and communicating with the corrosion inhibitor discharge holes 209 are formed in the rotating gear 204. The rotating gear 204 is a passive gear, and the passive gear meshes with an active gear 2041. The active gear 2041 is rotated by a rotating motor 2042, and the motor end of the rotating motor 2042 is fixed on the housing 21. The top of the corrosion inhibitor storage cavity 206 is covered with a sealing plate, and the sealing plate is threadedly connected to the corrosion inhibitor in a sealed manner.

[0059] As Figures 6 - 9As shown in the figure, the automatic sealing switch door 24 includes a cover plate 241, a left guiding slide rail mechanism 26, a right guiding slide rail mechanism 27, an electric push rod 242, a connecting plate 243, and a first connecting rod 244. The cover plate 241 is arranged on the discharge port 211. The left guiding slide rail mechanism 26 is arranged on the left side of the cover plate 241. The right guiding slide rail mechanism 27 is arranged on the right side of the cover plate 241. The electric push rod 242 is fixedly connected to the side wall of the housing 21 and is located above the middle of the cover plate 241. The push rod end of the electric push rod 242 is hinged to the first connecting rod 244, and the other end of the first connecting rod 244 is hinged to the cover plate 241. The left guiding slide rail mechanism 26 includes a guiding slide rail 261, a fixing plate 262, a second connecting rod 263, and a third connecting rod 264. The guiding slide rail 261 is provided with an L-shaped guiding chute 265 along the length direction. One end of the second connecting rod 263 is hinged to the top end of the fixing plate 262. One end of the third connecting rod 264 is hinged to the bottom end of the fixing plate 262. The other end of the second connecting rod 263 is hinged to the cover plate 241 and slides in the L-shaped guiding chute 265. The other end of the second connecting rod 263 is hinged to the cover plate 241. The structure of the right guiding slide rail mechanism 27 is the same as that of the left guiding slide rail mechanism 26. The fixing plate 262 of the left guiding slide rail mechanism 26 is connected to the fixing plate of the right guiding slide rail mechanism 27 through a connecting plate 243, and the connecting plate 243 is fixedly connected to the push rod end of the electric push rod 242.

[0060] As Figure 10 As shown in the figure, the corrosion inhibitor collecting device 25 includes two symmetrically distributed semi-cylindrical bodies 251 with open tops. The semi-cylindrical bodies 251 are arranged on the side wall of the buffer device body 1 and have opposite openings. Collection grooves 252 are respectively formed in the semi-cylindrical bodies 251. First magnets 253 are fixedly connected to the inner side walls of the semi-cylindrical bodies 251, and second magnets 254 that cooperate with the first magnets 253 are fixedly connected to the outer side wall of the housing 21.

[0061] Working principle: high-temperature molten salt enters the inlet chamber 5, and then enters the primary buffer chamber 6. Due to the expansion structure and the semicircular protrusion on the upper part of the impact-resistant cover 10, the impact force of the molten salt can be reduced; a part of the molten salt in the primary buffer chamber 6 contacts the solid corrosion inhibitor 3 of the corrosion inhibitor filling structure 2, and part of the dissolved corrosion inhibitor will enter the system with the molten salt to play an anti-corrosion role; the other part enters the secondary buffer chamber 9 through the vertical flow channel 8, which can further reduce the flow rate of the molten salt. The molten salt in the secondary buffer chamber 9 flows horizontally into the tertiary buffer chamber 1 through the cross flow hole 102 of the impact-resistant cover 10 1. Here, the downward molten salt is changed to a horizontal flow. At the same time, since the top flow structure 12 is located in the center and the opening is at the upper end, the molten salt will change its flow direction for a second time, that is, from a horizontal flow to an upward flow, and enter the fourth-level buffer chamber 13 through the opening at the upper end of the top flow structure 12. Through these buffering operations, the flow rate of the molten salt is greatly reduced, and the pressure reduction effect is significant. The molten salt in the fourth-level buffer chamber 13 flows into the outlet chamber 14 and finally enters the downcomer. The fourth-level buffer chamber 13 and the outlet chamber 14 are expanded to achieve the purpose of deceleration, thereby significantly reducing the speed and pressure, increasing the service life of the pipeline and reducing costs.

[0062] During use, the solid corrosion inhibitor 3 is replaced regularly. When replacing, the entry of high-temperature molten salt is stopped, and then the electric push rod 242 retracts, driving the second connecting rod 263 to move from the vertical groove of the L-shaped guide slot 265 to the horizontal groove, thereby causing the cover plate 241 to be displaced in the vertical direction, so that the cover plate 241 is removed from the discharge port, and then the second connecting rod 263 moves in the horizontal groove, displacing the cover plate 241 in the horizontal direction, so that the cover plate 241 moves to the top of the discharge port, exposing the discharge port 211, and the corrosion inhibitor falls from the discharge port to the corrosion inhibitor collection device at the bottom, and then the electric push rod 242 extends, driving the second connecting rod 263 to move in the horizontal groove of the L-shaped guide slot 265, with The movable cover plate 241 is pushed toward the discharge port. When the second connecting rod 263 moves to the vertical groove of the L-shaped guide slot 265, the cover plate 241 is displaced in the vertical direction to seal the discharge port. Then, the rotating gear 204 rotates to make the leakage hole and the corrosion inhibitor discharge hole correspond to each other, so that the corrosion inhibitor falls evenly into the shell through the leakage hole. When the feeding is completed, the rotating gear 204 rotates to stagger the leakage hole and the corrosion inhibitor discharge hole to prevent the corrosion inhibitor from falling, thereby completing the purpose of unloading, so that the corrosion inhibitor can be replaced regularly, and the ability to remove corrosive impurities in the molten salt is improved, thereby increasing the service life of the pipeline. At the same time, no manual replacement is required, reducing human contact with chemical substances and improving safety.

Claims

1. A molten salt buffer device, characterized in that, It includes a buffer device body (1) with a hollow interior. An inlet cavity (5) and an outlet cavity (14) are provided inside the buffer device body (1). An impact-resistant cover (10) is provided inside the buffer device body (1). An impact-resistant part (101) is provided at the top of the impact-resistant cover (10) opposite to the inlet cavity (5). A primary buffer cavity (6) and a secondary buffer cavity (9) are also provided inside the buffer device body (1). The primary buffer cavity (6) and the secondary buffer cavity (9) are sequentially arranged in the direction of the buffer device body (1) from the inlet cavity (5) to the outlet cavity (14). A partition (15) is provided between the primary buffer cavity (6) and the secondary buffer cavity (9). A vertical flow channel (8) is provided on the partition (15). A corrosion inhibitor filling structure (2) is provided on the outer side wall of the buffer device body (1) located at the primary buffer cavity (6). The corrosion inhibitor filling structure (2) includes a hollow housing (21) and a corrosion inhibitor (22). The bottom of the housing (21) is fixedly connected to the side wall of the primary buffer cavity (6). The corrosion inhibitor (22) is provided in the inner cavity of the housing (21). A corrosion inhibitor flow channel (7) is provided on the side wall of the primary buffer cavity (6). A corrosion inhibitor dropping mechanism (20) is provided at the top of the housing (21). A discharge port (211) is provided on the side wall of the housing (21). An automatic sealing switch door (24) is provided on the discharge port (211). A corrosion inhibitor collection device (25) is provided on the outer side wall of the secondary buffer cavity (9). The automatic sealing switch door (24) includes a cover plate (241), a left guiding slide rail mechanism (26), a right guiding slide rail mechanism (27), an electric push rod (242), a connecting plate (243), and a first connecting rod (244). The cover plate (241) is provided on the discharge port (211). The left guiding slide rail mechanism (26) is provided on the left side of the cover plate (241). The right guiding slide rail mechanism (27) is provided on the right side of the cover plate (241). The electric push rod (242) is fixedly connected to the side wall of the housing (21) and is located above the middle of the cover plate (241). The push rod end of the electric push rod (242) is hinged to the first connecting rod (244). The other end of the first connecting rod (244) is hinged to the cover plate (241). The left guiding slide rail mechanism (26) includes a guiding slide rail (261), a fixing plate (262), a second connecting rod (263), and a third connecting rod (264). The guiding slide rail (261) is provided with an L-shaped guiding chute (265) along its length direction. One end of the second connecting rod (263) is hinged to the top end of the fixing plate (262), and one end of the third connecting rod (264) is hinged to the bottom end of the fixing plate (262). The other end of the second connecting rod (263) is hinged to the cover plate (241) and slides within the L-shaped guiding chute (265). The other end of the second connecting rod (263) is hinged to the cover plate (241). The structure of the right guiding slide rail mechanism (27) is the same as that of the left guiding slide rail mechanism (26). The fixing plate (262) of the left guiding slide rail mechanism (26) is connected to the fixing plate of the right guiding slide rail mechanism (27) through a connecting plate (243), and the connecting plate (243) is fixedly connected to the push rod end of the electric push rod (242).

2. The molten salt buffer device according to claim 1, characterized in that, The impact-resistant part (101) is a convex surface arched upward, and the convex surface faces the oral cavity (5); or the impact-resistant part is a concave surface sunken downward, and the concave surface faces the oral cavity.

3. The molten salt buffer device according to claim 2, characterized in that, The top of the impact-resistant cover (10) penetrates through the partition plate (15) and extends into the secondary buffer cavity (9). The end surface of the open end of the impact-resistant cover (10) is fixedly connected to the bottom of the secondary buffer cavity (9). The open end of the impact-resistant cover (10) faces the outlet cavity (14). Transverse flow holes (102) are formed on the side wall of the impact-resistant cover (10), and a tertiary buffer cavity (11) is formed inside the cavity of the impact-resistant cover (10).

4. The molten salt buffer device according to claim 3, characterized in that, A top flow structure (12) is arranged in the tertiary buffer cavity (11). The top flow structure (12) includes an inner housing (121). The inner housing (121) is arranged in the tertiary buffer cavity (11). A quaternary buffer cavity (13) is arranged inside the inner housing (121). The open end of the inner housing (121) faces the outlet cavity (14). A flow hole (122) is formed at the top of the inner housing (121). The bottom of the inner housing (121) is designed with a flared opening, and the open end of the inner housing is connected to the side wall of the outlet cavity (14).

5. A molten salt buffer device according to claim 4, wherein The corrosion inhibitor dropping mechanism (20) includes a fixed circular ring plate (201), an inner side plate (202), an outer side plate (203), a rotating gear (204), a fixed bracket (205), and a rotating bearing (207). The fixed circular ring plate (201) is arranged above the housing (21) and is fixedly connected to the outer side wall of the housing (21) through the fixed bracket (205). The inner side plate (202) is arranged in the inner circle of the fixed circular ring plate (201), and the outer side plate (203) is arranged in the outer circle of the fixed circular ring plate (201). A corrosion inhibitor storage cavity (206) is formed between the inner side plate (202), the outer side plate (203), and the fixed circular ring plate (201). The rotating gear (204) is arranged below the fixed circular ring plate (201) and is rotatably connected to the fixed circular ring plate (201) through the rotating bearing (207). A through groove (208) for the first-stage buffer cavity (6) to pass through is formed in the middle of the rotating gear (204). A corrosion inhibitor discharge hole (209) is formed from the upper surface to the lower surface of the fixed circular ring plate (201). The corrosion inhibitor discharge holes (209) are distributed along the circumferential direction of the fixed circular ring plate (201). Leak holes (210) corresponding to and communicating with the corrosion inhibitor discharge holes (209) are formed in the rotating gear (204).

6. The molten salt buffer device according to claim 5, characterized in that, The corrosion inhibitor collection device (25) includes two symmetrically distributed semi-cylindrical bodies (251) with open tops. The semi-cylindrical bodies (251) are arranged on the side wall of the buffer device body (1) and have opposite openings. Collection grooves (252) are formed in the semi-cylindrical bodies (251). A first magnet (253) is fixedly connected to the inner side wall of the semi-cylindrical body (251), and a second magnet (254) that cooperates with the first magnet (253) is fixedly connected to the outer side wall of the housing (21).

Images