Low-temperature molten salt storage tank with baffle structure

Abstract

The utility model relates to low temperature molten salt storage equipment's technical field discloses low temperature molten salt storage tank with baffling structure, including vertical storage tank body, the top of storage tank body is provided with the tank top, and the bottom of storage tank body is fixed with baffling structure, is provided with annular injection structure, annular extraction structure and temperature detection rod in storage tank body, and annular injection structure and annular extraction structure are arranged along the radial direction interval of storage tank body, and form annular baffling area, baffling structure is located in annular baffling area, and annular injection structure and annular extraction structure are connected through baffling structure, through setting up annular injection structure and annular extraction structure and forming annular baffling area, cooperate the baffling structure in the area, realize the directional guidance to molten salt flow, change the flow mode of molten salt natural diffusion in the prior art, significantly prolong the flow path of molten salt in the tank, effectively solved the problem that new and old molten salt mixes insufficiently, temperature stratification.

Description

Technical Field

[0001] This utility model relates to the technical field of low-temperature molten salt storage equipment, and more specifically, to a low-temperature molten salt storage tank with a baffle structure. Background Technology

[0002] Low-temperature molten salt, as an excellent heat transfer and storage medium, is widely used in solar thermal power generation, industrial waste heat recovery, and other fields. During the storage of low-temperature molten salt, it is necessary to ensure stable temperature and uniform mixing to avoid problems such as temperature stratification, localized solidification, or impurity accumulation.

[0003] Existing cryogenic molten salt storage tanks typically employ simple injection and extraction structures. After injection, the molten salt diffuses naturally within the tank without an effective flow field guidance structure, resulting in insufficient mixing of new and old molten salts and the formation of obvious temperature stratification. Furthermore, the flow path of the molten salt within the tank is relatively short, and some molten salt may be extracted without being fully mixed, affecting its performance. Utility Model Content

[0004] The purpose of this invention is to provide a low-temperature molten salt storage tank with a baffle structure, which aims to solve the problem of insufficient mixing of molten salt in the existing low-temperature molten salt storage tank.

[0005] This utility model discloses a low-temperature molten salt storage tank with a baffle structure, comprising a vertical tank body, a tank top at the top of the tank body, and a baffle structure fixedly disposed at the bottom of the tank body; the tank body contains an annular injection structure, an annular extraction structure, and a temperature detection rod, wherein the annular injection structure and the annular extraction structure are arranged radially spaced along the tank body to form an annular baffle region; the baffle structure is located within the annular baffle region, and the annular injection structure and the annular extraction structure are connected through the baffle structure; The annular injection structure is used to inject cryogenic molten salt into the tank body, the annular extraction structure is used to extract cryogenic molten salt from the tank body, and the temperature detection rod is used to monitor the temperature of the cryogenic molten salt in the tank body.

[0006] Furthermore, the annular injection structure, the annular extraction structure, and the baffle structure are arranged concentrically.

[0007] Furthermore, the flow deflection structure includes multiple annular baffles, which are arranged at intervals around the annular flow deflection region in a circumferential manner. Molten salt channels are formed between adjacent annular baffles. One end of each annular baffle is connected to an annular injection structure, and the other end of each annular baffle is connected to an annular extraction structure.

[0008] Furthermore, the plurality of annular baffles are distributed obliquely in a counterclockwise direction along the annular baffle region.

[0009] Furthermore, the annular injection structure includes a main injection pipe and branch injection pipes. The bottom end of the main injection pipe is connected to the branch injection pipe, and the top end of the main injection pipe penetrates the top of the tank and extends to the outside of the top of the tank. The branch injection pipes are arranged in a ring shape. An inner liquid outlet pipe is provided on the radially inner side of the branch injection pipe, and an outer liquid outlet pipe is provided on the radially outer side of the branch injection pipe. Multiple inner liquid outlet pipes are distributed obliquely in a counterclockwise direction along the inner side of the branch injection pipe, and multiple outer liquid outlet pipes are distributed obliquely in a clockwise direction along the outer side of the branch injection pipe.

[0010] Furthermore, the annular extraction structure includes a main extraction pipe and branch extraction pipes. The bottom end of the main extraction pipe is connected to the branch extraction pipe, and the top end of the main extraction pipe penetrates the top of the tank and extends to the outside of the top of the tank. The branch extraction pipes are arranged in a ring shape. An inner extraction pipe is provided on the radially inner side of the branch extraction pipe, and an outer extraction pipe is provided on the radially outer side of the branch extraction pipe. Multiple inner extraction pipes are distributed obliquely in a counterclockwise direction along the inner side of the branch extraction pipe, and multiple outer extraction pipes are distributed obliquely in a clockwise direction along the outer side of the branch extraction pipe.

[0011] Furthermore, the annular branch extraction tube is located radially inside the annular branch injection tube, and the annular deflection region is formed between the two; the installation height of the branch extraction tube is lower than the installation height of the branch injection tube.

[0012] Furthermore, the inner outlet pipe and the outer extraction pipe are respectively located in the annular baffle region, the inner outlet pipe and the outer extraction pipe are arranged opposite to each other, and the annular baffle is located between the inner outlet pipe and the outer extraction pipe, and the inner outlet pipe and the outer extraction pipe are arranged radially to separate them.

[0013] Furthermore, the two sides of the annular baffle are respectively recessed inward to form grooves for fixing the inner liquid outlet pipe and the outer liquid extraction pipe. The two sides of the annular baffle are respectively provided with pipe clamps that cooperate with the grooves. One end of the pipe clamp is hinged to the annular baffle, and the other end of the pipe clamp is connected to a positioning pin for locking the pipe clamp on the annular baffle.

[0014] Furthermore, the adjacent annular baffles are arranged at an angle away from each other.

[0015] Compared with existing technologies, the cryogenic molten salt storage tank with a baffle structure provided by this utility model, by setting up an annular injection structure and an annular extraction structure to form an annular baffle region, and in conjunction with the baffle structure located in this region, achieves directional guidance of molten salt flow, changing the natural diffusion flow mode of molten salt in existing technologies, and significantly extending the flow path of molten salt in the tank; at the same time, the temperature detection rod can monitor the temperature of molten salt in the tank in real time, which is convenient for timely adjustment and effectively solves the problems of insufficient mixing of new and old molten salt and temperature stratification; the connection method of the baffle structure and the annular injection structure and the annular extraction structure ensures the stability of the flow field guidance, reduces the risk of local solidification and impurity accumulation, and improves the safety and use effect of molten salt storage. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a low-temperature molten salt storage tank with a baffle structure provided by this utility model; Figure 2 This is a cross-sectional three-dimensional schematic diagram of a low-temperature molten salt storage tank with a baffle structure provided by this utility model; Figure 3 This is a top view schematic diagram of the annular injection structure and the annular extraction structure provided by this utility model; Figure 4 This is a front view structural schematic diagram of the annular baffle provided by this utility model.

[0017] In the diagram: Tank body 10, tank top 20, baffle structure 30, annular injection structure 40, annular extraction structure 50, temperature detection rod 60, annular baffle area 70, annular baffle plate 31, pipe groove 32, pipe clamp 33, positioning pin 34, main injection pipe 41, branch injection pipe 42, inner liquid outlet pipe 43, outer liquid outlet pipe 44, main extraction pipe 51, branch extraction pipe 52, inner extraction pipe 53, outer extraction pipe 54. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0020] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] Reference Figure 1-4 The image shown is a preferred embodiment of the present invention.

[0022] A cryogenic molten salt storage tank with a baffle structure 30 includes a vertical tank body 10, a tank top 20 at the top of the tank body 10, and a baffle structure 30 fixedly installed at the bottom of the tank body 10. An annular injection structure 40, an annular extraction structure 50, and a temperature detection rod 60 are provided inside the tank body 10. The annular injection structure 40 and the annular extraction structure 50 are arranged radially at intervals along the tank body 10 to form an annular baffle region 70. The baffle structure 30 is located in the annular baffle region 70, and the annular injection structure 40 and the annular extraction structure 50 are connected through the baffle structure 30. The annular injection structure 40 is used to inject cryogenic molten salt into the storage tank body 10, the annular extraction structure 50 is used to extract the cryogenic molten salt from the storage tank body 10, and the temperature detection rod 60 is used to monitor the temperature of the cryogenic molten salt in the storage tank body 10.

[0023] The aforementioned cryogenic molten salt storage tank with a baffle structure, by setting up an annular injection structure 40 and an annular extraction structure 50 to form an annular baffle region 70, and in conjunction with the baffle structure 30 located within this region, achieves directional guidance of molten salt flow, changing the natural diffusion flow mode of molten salt in the prior art and significantly extending the flow path of molten salt within the tank. Simultaneously, the temperature detection rod 60 can monitor the molten salt temperature inside the tank in real time, facilitating timely adjustment and effectively solving the problems of insufficient mixing of new and old molten salt and temperature stratification. The connection method of the baffle structure 30, the annular injection structure 40, and the annular extraction structure 50 ensures the stability of the flow field guidance, reduces the risk of local solidification and impurity accumulation, and improves the safety and effectiveness of molten salt storage.

[0024] Both the annular injection structure 40 and the annular extraction structure 50 are provided with mounting supports for installing the bottom of the storage tank body 10.

[0025] In this embodiment, the annular injection structure 40, the annular extraction structure 50, and the baffle structure 30 are arranged concentrically.

[0026] The annular injection structure 40, the annular extraction structure 50, and the baffle structure 30 are arranged concentrically, so that the flow of molten salt in the tank is symmetrically distributed, avoiding local flow velocities that are too fast or too slow, and ensuring that the molten salt in each area of ​​the tank is subjected to uniform force and the flow field is stable. The symmetrical structure allows the injected molten salt to diffuse evenly to all positions of the annular baffle region 70, forming a synergistic effect with the baffle structure 30, further improving the mixing uniformity, while facilitating processing, manufacturing, and assembly, and reducing production difficulty.

[0027] In this embodiment, the flow deflection structure 30 includes a plurality of annular baffles 31, which are arranged at intervals around the annular flow deflection region 70. Molten salt channels are formed between adjacent annular baffles 31. One end of the annular baffle 31 is connected to the annular injection structure 40, and the other end of the annular baffle 31 is connected to the annular extraction structure 50.

[0028] Multiple annular baffles 31 are arranged circumferentially to form molten salt channels, forcing the molten salt to flow along the designated channels and preventing direct short-circuiting of the molten salt (being extracted before it is fully mixed). The annular baffles 31 connect the annular injection structure 40 and the annular extraction structure 50 to form a complete flow guidance channel, enhancing the regularity of the flow field. When the molten salt flows in the channels, it interacts with the annular baffles 31 and the molten salt in adjacent channels, increasing the degree of turbulence, promoting full contact and mixing of new and old molten salt, effectively alleviating temperature stratification, and reducing the deposition of impurities at the bottom of the tank body 10.

[0029] In this embodiment, multiple annular baffles 31 are distributed obliquely in a counterclockwise direction along the annular baffle region 70.

[0030] The annular baffles 31 are distributed obliquely in a counterclockwise direction, which can guide the molten salt to form a spiral flow trajectory. Compared with the straight flow channel, the spiral flow greatly increases the flow path and residence time of the molten salt, further improving the mixing effect. The centrifugal force generated by the spiral flow can drive the molten salt in different areas of the tank to circulate and exchange, reduce the flow dead zone (the area where the molten salt is difficult to flow), avoid solidification or impurity accumulation caused by long-term stagnation of local molten salt, and at the same time enhance the heat transfer efficiency, making the temperature distribution in the tank more uniform.

[0031] In this embodiment, the annular injection structure 40 includes a main injection pipe 41 and a branch injection pipe 42. The bottom end of the main injection pipe 41 is connected to the branch injection pipe 42, and the top end of the main injection pipe 41 penetrates the tank top 20 and extends to the outside of the tank top 20. The branch injection pipe 42 is arranged in a ring shape. An inner liquid outlet pipe 43 is provided on the radial inner side of the branch injection pipe 42, and an outer liquid outlet pipe 44 is provided on the radial outer side of the branch injection pipe 42. Multiple inner liquid outlet pipes 43 are distributed obliquely in a counterclockwise direction along the inner side of the branch injection pipe 42, and multiple outer liquid outlet pipes 44 are distributed obliquely in a clockwise direction along the outer side of the branch injection pipe 42.

[0032] The main injection pipe 41 works in conjunction with the annular branch injection pipe 42 to achieve uniform annular injection of molten salt, avoiding excessively high local concentrations and uneven mixing caused by single-point injection. The inner outlet pipe 43, which is inclined counterclockwise on the inside, and the outer outlet pipe 44, which is inclined clockwise on the outside, form a bidirectional rotating flow field. The injected molten salt diffuses into the annular deflection region 70 from both the inside and outside sides at the same time, forming a counter-current mixing and enhancing the turbulence effect. The bidirectional obliquely distributed outlet pipes make the kinetic energy of molten salt injection more evenly transferred to the tank, avoiding flow field turbulence caused by excessive local impact. When combined with the deflection structure 30, it can further improve the fullness and uniformity of molten salt mixing.

[0033] In this embodiment, the annular extraction structure 50 includes a main extraction pipe 51 and a branch extraction pipe 52. The bottom end of the main extraction pipe 51 is connected to the branch extraction pipe 52, and the top end of the main extraction pipe 51 penetrates the tank top 20 and extends to the outside of the tank top 20. The branch extraction pipe 52 is arranged in an annular shape. An inner extraction pipe 53 is provided on the radial inner side of the branch extraction pipe 52, and an outer extraction pipe 54 is provided on the radial outer side of the branch extraction pipe 52. Multiple inner extraction pipes 53 are distributed obliquely in a counterclockwise direction along the inner side of the branch extraction pipe 52, and multiple outer extraction pipes 54 are distributed obliquely in a clockwise direction along the outer side of the branch extraction pipe 52.

[0034] The annular branch extraction pipe 52 works in conjunction with the main extraction pipe 51 to achieve uniform annular extraction of molten salt, avoiding local pressure imbalance and flow field disturbance caused by single-point extraction. The inner extraction pipe 53, which is inclined counterclockwise on the inside, and the outer extraction pipe 54, which is inclined clockwise on the outside, can simultaneously extract molten salt inside and outside the annular baffle region 70, ensuring that the fully mixed molten salt at different locations is extracted evenly, avoiding excessive retention of molten salt in some areas or extraction without mixing. The extraction direction and the injection direction work together to maintain stable circulation of molten salt in the tank, further consolidating the mixing effect and ensuring the consistency of temperature and composition of the output molten salt.

[0035] Furthermore, both the inner pumping pipe 53 and the outer pumping pipe 54 are arranged at an angle toward the bottom of the tank.

[0036] In this embodiment, the annular branch extraction tube 52 is located radially inside the annular branch injection tube 42, and an annular deflection region 70 is formed between the two; the installation height of the branch extraction tube 52 is lower than the installation height of the branch injection tube 42.

[0037] The branch extraction pipe 52 is located radially inside the branch injection pipe 42, creating a radially layered flow space in the annular deflection region 70. After the molten salt is injected from the outside, it flows radially inside to the branch extraction pipe 52, with a clear path and no cross-interference. The branch extraction pipe 52 is installed at a lower height than the branch injection pipe 42, creating an axial height difference. This causes the molten salt to flow radially while simultaneously generating axial settling flow, forming a three-dimensional flow field (radial and axial), further extending the flow path and mixing time. The height difference design also utilizes gravity to draw out (or circulate and mix) some impurities at the bottom of the tank body 10 along with the molten salt flow, reducing the accumulation of impurities at the bottom of the tank body 10. At the same time, it avoids the preferential extraction of insufficiently mixed molten salt from the upper layer, improving the quality of the extracted molten salt.

[0038] Furthermore, both the inner liquid outlet pipe 43 and the outer liquid outlet pipe 44 are arranged at an angle toward the bottom of the tank.

[0039] In this embodiment, the inner outlet pipe 43 and the outer extraction pipe 54 are located in the annular baffle region 70, and the inner outlet pipe 43 and the outer extraction pipe 54 are arranged in a staggered manner. The annular baffle plate 31 is located between the inner outlet pipe 43 and the outer extraction pipe 54, and the inner outlet pipe 43 and the outer extraction pipe 54 are arranged radially to separate them.

[0040] The inner outlet pipe 43 and the outer extraction pipe 54 are arranged in a staggered manner to avoid the injected molten salt being directly extracted (short-circuited), ensuring that the molten salt must pass through the flow channel of the annular baffle region 70 for thorough mixing; the annular baffle plate 31 is radially separated between the two, further refining the flow channel structure, making the molten salt flow path more regular, and avoiding mutual interference between molten salts in different flow channels; the separated arrangement also allows the molten salt to collide and split with the baffle plate multiple times during the flow process, enhancing the degree of turbulence, promoting the homogenization of temperature and composition, and effectively preventing the phenomenon of excessively high or low local temperatures.

[0041] In this embodiment, the two sides of the annular baffle 31 are respectively recessed inward to form grooves 32 for fixing the inner liquid outlet pipe 43 and the outer liquid extraction pipe 54. The two grooves 32 have different heights. The two sides of the annular baffle 31 are respectively provided with pipe clamps 33 that cooperate with the grooves 32. One end of the pipe clamp 33 is hinged to the annular baffle 31, and the other end of the pipe clamp 33 is connected to a positioning pin 34 for locking the pipe clamp 33 on the annular baffle 31.

[0042] The grooves 32 on the annular baffle 31 are used to fix the inner outlet pipe 43 and the outer extraction pipe 54, ensuring the stability of the pipe installation and preventing the pipe from loosening or shifting due to the impact of molten salt flow, thus ensuring the stability of the flow field guidance. The two grooves 32 have different heights to accommodate the difference in installation height between the inner outlet pipe 43 and the outer extraction pipe 54, preventing interference between the pipes and ensuring unobstructed flow. The hinged pipe clamps 33, in conjunction with the positioning pins 34, enable rapid installation, disassembly, and maintenance of the pipes, reducing equipment maintenance costs. The cooperation between the pipe clamps 33 and the grooves 32 further enhances the sealing of the connection between the pipe and the baffle, preventing flow field disturbance caused by molten salt leakage from the connection and ensuring the reliable implementation of the technical solution.

[0043] In this embodiment, adjacent annular baffles 31 are arranged at an angle away from each other (i.e., adjacent annular baffles 31 are arranged at an angle in the clockwise and counterclockwise directions, respectively).

[0044] Adjacent annular baffles 31 are arranged obliquely in alternating clockwise and counterclockwise directions to form a staggered flow channel structure. Molten salt needs to constantly change its flow direction during the flow process, which greatly improves the turbulence intensity and mixing effect. The staggered flow channel can break the flow dead zone caused by unidirectional flow, so that molten salt in all areas of the tank can participate in circulation and mixing, further alleviating temperature stratification. At the same time, the staggered annular baffles 31 have a stronger blocking and guiding effect on molten salt, which can effectively drive the impurities deposited at the bottom of the tank body 10 to re-participate in the flow, reduce impurity accumulation, reduce the risk of local solidification, and improve the long-term operational stability of the equipment.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cryogenic molten salt storage tank with a baffle structure, characterized in that, The system includes a vertical storage tank body, with a tank top at the top and a baffle structure fixedly installed at the bottom. The tank body contains an annular injection structure, an annular extraction structure, and a temperature detection rod. The annular injection structure and the annular extraction structure are arranged radially at intervals along the tank body, forming an annular baffle region. The baffle structure is located within the annular baffle region, and the annular injection structure and the annular extraction structure are connected through the baffle structure. The annular injection structure is used to inject cryogenic molten salt into the tank body, the annular extraction structure is used to extract cryogenic molten salt from the tank body, and the temperature detection rod is used to monitor the temperature of the cryogenic molten salt in the tank body.

2. The cryogenic molten salt storage tank with a baffle structure as described in claim 1, characterized in that, The annular injection structure, annular extraction structure, and baffle structure are arranged concentrically.

3. The cryogenic molten salt storage tank with a baffle structure as described in claim 2, characterized in that, The flow deflection structure includes multiple annular baffles, which are arranged at intervals around the annular flow deflection region. Molten salt channels are formed between adjacent annular baffles. One end of each annular baffle is connected to an annular injection structure, and the other end is connected to an annular extraction structure.

4. The cryogenic molten salt storage tank with a baffle structure as described in claim 3, characterized in that, The multiple annular baffles are distributed obliquely in a counterclockwise direction along the annular baffle region.

5. The cryogenic molten salt storage tank with a baffle structure as described in any one of claims 3 or 4, characterized in that, The annular injection structure includes a main injection pipe and branch injection pipes. The bottom end of the main injection pipe is connected to the branch injection pipe, and the top end of the main injection pipe penetrates the top of the tank and extends to the outside of the top of the tank. The branch injection pipes are arranged in a ring shape. An inner liquid outlet pipe is provided on the radially inner side of the branch injection pipe, and an outer liquid outlet pipe is provided on the radially outer side of the branch injection pipe. Multiple inner liquid outlet pipes are distributed obliquely in a counterclockwise direction along the inner side of the branch injection pipe, and multiple outer liquid outlet pipes are distributed obliquely in a clockwise direction along the outer side of the branch injection pipe.

6. The cryogenic molten salt storage tank with a baffle structure as described in claim 5, characterized in that, The annular extraction structure includes a main extraction pipe and branch extraction pipes. The bottom end of the main extraction pipe is connected to the branch extraction pipe, and the top end of the main extraction pipe penetrates the top of the tank and extends to the outside of the top of the tank. The branch extraction pipes are arranged in a ring shape. An inner extraction pipe is provided on the radial inner side of the branch extraction pipe, and an outer extraction pipe is provided on the radial outer side of the branch extraction pipe. The multiple inner extraction tubes are arranged obliquely in a counterclockwise direction along the inner side of the branch extraction tube, and the multiple outer extraction tubes are arranged obliquely in a clockwise direction along the outer side of the branch extraction tube.

7. The cryogenic molten salt storage tank with a baffle structure as described in claim 6, characterized in that, The annular branch extraction tube is located radially inside the annular branch injection tube, and the annular deflection region is formed between the two; the installation height of the branch extraction tube is lower than the installation height of the branch injection tube.

8. The cryogenic molten salt storage tank with a baffle structure as described in claim 7, characterized in that, The inner outlet pipe and the outer extraction pipe are located in the annular baffle region, and the inner outlet pipe and the outer extraction pipe are arranged opposite to each other. The annular baffle is located between the inner outlet pipe and the outer extraction pipe, and the inner outlet pipe and the outer extraction pipe are arranged radially to separate them.

9. The cryogenic molten salt storage tank with a baffle structure as described in claim 8, characterized in that, The annular baffle plate has inwardly recessed grooves on both sides to fix the inner liquid outlet pipe and the outer liquid extraction pipe. The annular baffle plate has pipe clamps on both sides that cooperate with the grooves. One end of the pipe clamp is hinged to the annular baffle plate, and the other end of the pipe clamp is connected to a positioning pin for locking the pipe clamp on the annular baffle plate.

10. The cryogenic molten salt storage tank with a baffle structure as described in claim 3, characterized in that, The adjacent annular baffles are arranged at an angle away from each other.

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