Cold energy recycling system for intermediate energy storage tank and low-temperature liquefaction storage tank

Abstract

The utility model provides a cold energy recycling system for an intermediate energy storage tank and a low-temperature liquefaction storage tank. The cold energy recycling system comprises an outer tank, an inner tank, a heat preservation structure, a first communicating pipe and a second communicating pipe, the inner tank is positioned in the outer tank; a cooling capacity storage structure is arranged in the inner tank; the cold energy storage structure can exchange heat with the cold air to absorb and store cold energy in the cold air, and can also exchange heat with the hot air to release cold energy and cool the hot air; the thermal insulation structure is arranged between the outer tank and the inner tank to insulate cold of the inner tank; the first communicating pipe is used for communicating other structures with the inner tank; the second communicating pipe is used for communicating the inner tank with the external environment; the first communicating pipe, the inner tank and the second communicating pipe form a first circulating channel, so that the cooling capacity of the cold air can be stored in the inner tank, or the cooling capacity of the cold air can be stored in the inner tank, and the inner tank releases the cooling capacity and cools the hot air, so that the middle energy storage tank can absorb and store the cooling capacity in the vaporization process of the liquid cold source; and the energy utilization efficiency of the liquid cold source is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cryogenic storage tanks, and particularly relates to an intermediate energy storage tank and a cold energy reuse system for a cryogenic liquefied storage tank. Background Art

[0002] At present, China is gradually increasing the use of clean energy, so as to reduce the dependence on traditional fossil energy, reduce environmental pollution and protect the environment. Clean energy can include natural gas, methanol, etc.

[0003] Generally, clean energy is placed in a cryogenic liquefied storage tank after cryogenic liquefaction treatment for long-term storage of various clean energies. When the liquid cold source in the cryogenic liquefied storage tank is used, the liquid cold source absorbs the heat of the outside air to vaporize and is input into external components, resulting in waste of the cold energy of the liquid cold source and low energy utilization efficiency. Summary of the Utility Model

[0004] The purpose of this application is to provide an intermediate energy storage tank and a cold energy reuse system for a cryogenic liquefied storage tank that can store the cold energy generated during the vaporization of liquefied natural gas.

[0005] To solve the above technical problems, this application adopts the following technical solutions:

[0006] According to one aspect of this application, this application provides an intermediate energy storage tank that can absorb and store the cold energy generated during the vaporization of the liquid cold source in the cryogenic liquefied storage tank. It includes: an outer tank, an inner tank, a thermal insulation structure, a first connecting pipe and a second connecting pipe; the inner tank is placed in the outer tank; a cold energy storage structure is arranged in the inner tank, and the cold energy storage structure can exchange heat with cold air to absorb and store the cold energy in the cold air, and the cold energy storage structure can also exchange heat with hot air to release cold energy and cool down the hot air; the thermal insulation structure is arranged between the outer tank and the inner tank to keep the inner tank cold; the first end of the first connecting pipe passes through the outer tank for connecting with other structures, and the second end of the first connecting pipe is connected to the inner tank; the first end of the second connecting pipe is connected to the inner tank, and the second end of the second connecting pipe passes through the outer tank for connecting with the external environment; wherein, the first connecting pipe, the inner tank and the second connecting pipe form a first flow path; the first flow path can store the cold energy of the cold air in the inner tank, or the first flow path can store the cold energy of the cold air in the inner tank and the inner tank can release cold energy and cool down the hot air.

[0007] In some embodiments, the cold energy storage structure includes a plurality of cold energy storage components, and there is a ventilation gap between the plurality of cold energy storage components for the gas in the inner tank to flow through.

[0008] In some embodiments, the cold storage structure further includes a partition member for accommodating a plurality of the cold storage members; a plurality of mesh holes are formed in the peripheral sidewall of the partition member;

[0009] In some embodiments, the inner tank further includes a plurality of support columns arranged at intervals, one ends of the plurality of support columns are all connected to the inner peripheral wall of the inner tank, and the other ends of the plurality of support columns are all connected to the partition member, so that there is an interval between the partition member and the inner peripheral wall of the inner tank.

[0010] In some embodiments, a spiral extension pipe is further arranged in the inner tank, a first end of the spiral extension pipe communicates with a second end of the first communication pipe, a second end of the spiral extension pipe spirally extends among the plurality of cold storage members, and a plurality of communication holes are formed in the peripheral sidewall of the spiral extension pipe.

[0011] In some embodiments, the second end of the first communication pipe communicates with the lower part of the inner tank, and the first end of the second communication pipe communicates with the upper part of the inner tank.

[0012] In some embodiments, a ceiling is arranged in the outer tank, the ceiling is connected to the upper part of the outer tank and extends in the horizontal direction; a plurality of accommodation holes are formed in the ceiling, and the upper part of the inner tank passes through the ceiling; the heat insulation structure includes a suspended ceiling heat insulation layer, an inner tank heat insulation layer and a filling layer, the suspended ceiling heat insulation layer is arranged on the upper side of the ceiling and covers the upper part of the inner tank; the inner tank heat insulation layer and the filling layer are located on the lower side of the ceiling; the inner tank heat insulation layer covers the outer peripheral wall of the inner tank; the filling layer is filled between the heat insulation layer and the outer tank.

[0013] In some embodiments, a plurality of the inner tanks are arranged in the outer tank, the first communication pipe is respectively communicated with the plurality of inner tanks, and the second communication pipe is respectively communicated with the plurality of inner tanks, so that the plurality of inner tanks are arranged in parallel; or a plurality of inner tank connection groups are arranged in the outer tank, and a plurality of inner tanks are connected in series in each inner tank connection group; the innermost upstream inner tanks in the plurality of inner tank connection groups are respectively communicated with the first communication pipe, and the innermost downstream inner tanks in the plurality of inner tank connection groups are respectively connected to the second communication pipe, so that the plurality of inner tank connection groups are arranged in parallel.

[0014] In some embodiments, when the first flow passage is used for storing the cold quantity of the cold air in the inner tank, the intermediate energy storage tank further includes a third communication pipe and a fourth communication pipe. The second end of the third communication pipe communicates with the inner tank, and the first end of the third communication pipe penetrates through the outer tank to communicate with the external environment, so as to input the external hot air into the inner tank. The first end of the fourth communication pipe communicates with the inner tank, and the second end of the fourth communication pipe penetrates through the outer tank. Wherein, the third communication pipe, the inner tank and the fourth communication pipe form a second flow passage, and the second flow passage is used for the inner tank to release cold quantity to cool the hot air into cold air and output the cold air in the inner tank.

[0015] A cold quantity reuse system for a cryogenic liquefied storage tank, which includes: the intermediate energy storage tank as described in any one of the above.

[0016] In some embodiments, the cold quantity reuse system for a cryogenic liquefied storage tank further includes: a cryogenic liquefied storage tank and a vaporization structure; the vaporization structure is communicated with the cryogenic liquefied storage tank to be able to assist the vaporization of the liquid cold source in the cryogenic liquefied storage tank; the vaporization structure includes a cold quantity absorption cavity, and the gas in the cold quantity absorption cavity can absorb the cold quantity released during the vaporization process of the liquid cold source to cool down and form cold air. Wherein, the first end of the first communication pipe can communicate with the cold quantity absorption cavity, so that the cold air in the cold quantity absorption cavity enters the inner tank; the cold quantity storage structure can absorb and store the cold quantity in the cold air, so that the cold air is heated into hot air; the second communication pipe can discharge the hot air in the inner tank.

[0017] In some embodiments, the cold quantity reuse system for a cryogenic liquefied storage tank further includes: a compressor and a liquefied air storage tank; the input end of the compressor can be communicated with the first end of the first communication pipe; the input end of the liquefied air storage tank is connected to the compressor. Wherein, when the external hot air passes through the first flow passage, the hot air absorbs the cold quantity in the inner tank and cools down to cold air, and then the cold air is input into the compressor; the compressor compresses the cold air into cryogenic liquefied air and outputs it into the liquefied air storage tank.

[0018] It can be seen from the above technical solutions that the present application has at least the following advantages and positive effects:

[0019] In the present application, when the cryogenic liquefied storage tank is in use, the liquid cold source in the cryogenic liquefied storage tank vaporizes. During the vaporization process of the liquid cold source, in order to improve the utilization rate of the cold quantity in the liquid cold source, the cold air generated by absorbing the cold quantity of the liquid cold source is input into the inner tank through the first communication pipe, and the cold air exchanges heat with the cold quantity storage structure, so that the cold quantity storage structure absorbs and stores the cold quantity in the cold air. The heat preservation structure can keep the inner tank warm and prevent the escape of the cold quantity in the inner tank. The intermediate energy storage tank can absorb and store the cold quantity during the vaporization process of the liquid cold source, so as to improve the energy utilization efficiency of the liquid cold source. Description of the Drawings

[0020] Figure 1 It is a structural sectional view of the intermediate energy storage tank of the present utility model.

[0021] The description of the reference numerals in the drawings is as follows: 100, outer tank; 110, bottom plate; 120, outer tank cylinder; 121, discharge port; 122, first manhole; 130, top cover; 131, second manhole; 200, inner tank; 201, inner tank cylinder; 202, head; 220, cold storage structure; 221, cold storage member; 222, partition member; 2221, mesh hole; 230, support column; 240, support leg; 241, first support portion; 242, heat insulation block; 243, second support portion; 310, first connecting pipe; 320, second connecting pipe; 330, third connecting pipe; 340, fourth connecting pipe; 400, heat insulation structure; 410, suspended roof heat insulation layer; 420, inner tank heat insulation layer; 430, filling layer; 510, ceiling; 511, accommodation hole; 520, spiral ladder; 530, top platform; 540, transportation track. Detailed implementation manners

[0022] Typical implementation manners reflecting the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different implementation manners, all of which do not depart from the scope of the present application, and the descriptions and illustrations therein are essentially for illustrative purposes and not for limiting the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0024] The low-temperature liquefied storage tank is used to accommodate a liquid cold source. The liquid cold source may include liquefied natural gas, liquefied methanol, etc.

[0025] A vaporization structure can be provided on a cryogenic liquefied storage tank. The vaporization structure is connected to the cryogenic liquefied storage tank to assist in vaporizing the liquid cold source in the cryogenic liquefied storage tank. The liquid cold source will release cold energy during the vaporization process, and the wasted cold energy will be dissipated to the outside world, thereby reducing the energy utilization efficiency of the liquid cold source.

[0026] In some embodiments, the vaporization structure includes a cold energy absorption cavity. The gas in the cold energy absorption cavity can absorb the cold energy released during the vaporization process of the liquid cold source to cool down and form cold air.

[0027] Figure 1 It is a structural sectional view of the intermediate energy storage tank of the present utility model.

[0028] Refer to Figure 1 , this application provides an intermediate energy storage tank. The intermediate energy storage tank can absorb and store the cold energy generated during the vaporization process of the liquid cold source in the cryogenic liquefied storage tank, that is, the intermediate energy storage tank can absorb and store the cold energy of the cold air in the cold energy absorption cavity, thereby facilitating the recycling of the cold energy in the cold air and improving the energy utilization efficiency of the liquid cold source.

[0029] Refer to Figure 1 , for the convenience of understanding and description, taking the state where the intermediate energy storage tank is placed on the ground as a reference, the direction of the intermediate energy storage tank relative to the ground is the upper direction in the following text, and the direction away from the upper direction is the lower direction in the following text.

[0030] Refer to Figure 1 , the present utility model provides an intermediate energy storage tank, which may include an outer tank 100, an inner tank 200, a thermal insulation structure 400, a first connecting pipe 310 and a second connecting pipe 320. The inner tank 200 is accommodated in the outer tank 100. A cold energy storage structure 220 may be provided in the inner tank 200. The cold energy storage structure 220 can exchange heat with the cold air to absorb and store the cold energy in the cold air, and the cold energy storage structure 220 can also exchange heat with the hot air to release the cold energy and cool down the hot air. The thermal insulation structure 400 may be provided between the outer tank 100 and the inner tank 200 to keep the inner tank 200 cold. The first end of the first connecting pipe 310 passes through the outer tank 100 for communicating with other structures (not shown in the figure), and the second end of the first connecting pipe 310 is connected to the inner tank 200. The first end of the second connecting pipe 320 is connected to the inner tank 200, and the second end of the second connecting pipe 320 passes through the outer tank 100 for communicating with the external environment. Among them, the first connecting pipe 310, the inner tank 200 and the second connecting pipe 320 form a first flow path; the first flow path can store the cold energy of the cold air in the inner tank 200, or the first flow path can store the cold energy of the cold air in the inner tank 200 and the inner tank 200 can release the cold energy and cool down the hot air.

[0031] During the use of the intermediate energy storage tank, the first flow path has a cold energy storage function and a cold energy release function.

[0032] When the first flow path has a cold storage function, the first connecting pipe 310 inputs the cold air in the cold absorption cavity into the inner tank 200. The temperature of the cold storage structure 220 is lower than that of the cold air, so that the cold storage structure 220 in the inner tank 200 can absorb the cold in the cold air. After the cold storage structure 220 absorbs the cold in the cold air, the cold air is heated into hot air, and then the hot air is discharged to the outside through the second connecting pipe 320. At this time, the intermediate energy storage tank can store cold through the cold storage structure 220.

[0033] When the first flow path has a cold release function, the hot air to be cooled outside can enter the inner tank 200 through the second connecting pipe 320. The temperature of the hot air is higher than that of the cold storage structure 220, and the hot air can absorb the cold of the cold storage structure 220, so that the hot air can be cooled to form cold air, and then discharged to other structures through the first connecting pipe 310 for storage and use of the cold air.

[0034] Alternatively, the first flow path may only have a cold storage function, and the inner tank 200 is connected to the outside through other flow paths, so that the other flow paths have a cold release function, and then the cold air after the inner tank 200 releases cold and cools down is output to other structures through the other flow paths for storage and use of the cold air.

[0035] Refer to Figure 1 , in this embodiment, the intermediate energy storage tank may include an outer tank 100. The outer tank 100 may include a bottom plate 110, an outer tank cylinder 120 and a top cover 130. The bottom plate 110 extends in the horizontal direction. The lower end of the outer tank cylinder 120 is connected to the bottom plate 110. The top cover 130 covers the outer tank cylinder 120 to enclose the space inside the outer tank 100. The outer tank 100 may be sealed to improve the cold insulation performance of the outer tank 100 and prevent foreign objects from entering the outer appearance.

[0036] In some embodiments, a discharge port 121 is provided at the lower part of the outer tank cylinder 120 for discharging a part of the heat insulation structure 400, so as to facilitate the inspection and maintenance of the intermediate energy storage tank.

[0037] In some embodiments, a first manhole 122 is provided at the lower part of the outer tank cylinder 120, and the first manhole 122 can facilitate the staff to enter the outer tank 100 for inspection and maintenance of the intermediate energy storage tank.

[0038] In some embodiments, a second manhole 131 is provided at the top of the top cover 130, and the second manhole 131 is used for the staff to enter the intermediate energy storage tank, so as to facilitate the assembly, inspection and maintenance of the intermediate energy storage tank.

[0039] Refer to Figure 1, in this embodiment, the intermediate energy storage tank may further include an inner tank 200. The inner tank 200 is accommodated in the outer tank 100. The inner tank 200 may include an inner tank cylinder body 201 and two end heads 202. The two end heads 202 are fixedly connected to both ends of the inner tank cylinder body 201.

[0040] A cold storage structure 220 may be provided in the inner tank 200 so that the cold storage structure 220 can absorb and store cold, and can also release cold through the cold storage structure 220, thereby enabling the storage of cold.

[0041] The cold storage structure 220 may include a plurality of cold storage members 221. There is a ventilation gap between the plurality of cold storage members 221 for the gas in the inner tank 200 to flow through, and it is convenient for the gas to fully contact the cold storage members 221, thereby improving the heat exchange efficiency.

[0042] In some embodiments, the cold storage member 221 may be a solid structure. The solid structure may be basalt. The solid structure may also be cold-insulated steel or cold-insulated plastic.

[0043] Refer to Figure 1 , in this embodiment, the cold storage structure 220 may further include a partition member 222, and the partition member 222 is used to accommodate the plurality of cold storage members 221. On the one hand, the partition member 222 can prevent the cold storage members 221 from directly contacting the inner wall of the inner tank 200, thereby protecting the inner tank 200. On the other hand, the partition member 222 can separate the cold storage members 221 from the inner tank 200, thereby reducing the rate of cold transfer from the cold storage members 221 to the inner tank 200.

[0044] In some embodiments, a plurality of mesh holes 2221 are formed on the circumferential side wall of the partition member 222 to facilitate the cold air in the inner tank 200 to enter the cold storage structure 220.

[0045] Refer to Figure 1 , in this embodiment, the inner tank 200 further includes a plurality of support columns 230 arranged at intervals. One ends of the plurality of support columns 230 are all connected to the inner peripheral wall of the inner tank 200, and the other ends of the plurality of support columns 230 are all connected to the partition member 222, so that there is an interval between the partition member 222 and the inner peripheral wall of the inner tank 200, thereby reducing the rate of cold transfer from the cold storage members 221 to the inner tank 200 and improving the cold insulation effect of the inner tank 200.

[0046] Refer to Figure 1 , in this embodiment, a spiral extension pipe (not shown in the figure) may also be provided in the inner tank 200. The first end of the spiral extension pipe is communicated with the second end of the first communication pipe 310, and the second end of the spiral extension pipe spirally extends among the plurality of cold storage members 221. A plurality of communication holes are formed on the circumferential side wall of the spiral extension pipe.

[0047] When the first flow path inputs cold air into the inner tank 200, the spiral extension tube can facilitate the full dissipation of the cold air between the multiple cold storage components 221, thereby improving the heat exchange efficiency between the cold air and the cold storage components 221.

[0048] In some other embodiments, the spiral extension tube is disposed at the bottom of the inner tank 200.

[0049] Refer to Figure 1 , in this embodiment, the intermediate energy storage tank may include a first communication pipe 310 and a second communication pipe 320. Both the first communication pipe 310 and the second communication pipe 320 communicate with the inner tank 200.

[0050] The second end of the first communication pipe 310 communicates with the lower part of the inner tank 200, and the first end of the second communication pipe 320 communicates with the upper part of the inner tank 200.

[0051] When the first flow path uses the cold storage function, due to the principle of thermal expansion and contraction, the temperature of the cold air is relatively low, making the density of the cold air relatively high, so that the cold air input by the first communication pipe 310 flows slowly from bottom to top, thereby improving the heat exchange efficiency between the cold air and the cold storage components 221.

[0052] Moreover, when the first flow path uses the cold release function, the second communication pipe 320 extends the hot air to be cooled outside into the inner tank 200, and the cold storage components 221 in the inner tank 200 release cold, and the hot air input into the inner tank 200 slowly moves downward from the top of the inner tank 200 to further improve the heat exchange efficiency between the hot air and the cold storage components 221.

[0053] In some embodiments, the axis of the inner tank 200 may extend in the vertical direction or in the horizontal direction, so that the second end of the first communication pipe 310 communicates with the lower part of the inner tank 200, and the first end of the second communication pipe 320 communicates with the upper part of the inner tank 200.

[0054] Refer to Figure 1 , in this embodiment, electric valves (not shown in the figure) may be respectively provided on the first communication pipe 310 and the second communication pipe 320 to be able to respectively turn on and off the first communication pipe 310 and the second communication pipe 320. In some embodiments, temperature sensors (not shown in the figure) are provided on the first communication pipe 310 and the second communication pipe 320 to respectively detect the temperature of the gas flowing in the first communication pipe 310 and the second communication pipe 320.

[0055] In some embodiments, the intermediate energy storage tank may further include a control device (not shown in the figure). The control device can be electrically connected to the temperature sensor to receive and display the temperature parameter data of the temperature sensor. The control device can also be electrically connected to the electric valve to respectively control the on / off of the first communication pipe 310 and the second communication pipe 320.

[0056] Refer to Figure 1 , in the present embodiment, a plurality of legs 240 may be further provided on the inner tank 200. The plurality of legs 240 are connected to the bottom plate 110 to support the inner tank 200 in the outer tank 100, thereby reducing the cold quantity dissipation rate in the inner tank 200 and improving the cold insulation efficiency of the intermediate energy storage tank.

[0057] In some embodiments, the inner tank 200 includes a first support portion 241, a cold insulation block 242, and a second support portion 243. The upper end of the first support portion 241 is connected to the inner tank 200, and the lower end of the first support portion 241 is connected to the cold insulation block 242. The upper end of the second support portion 243 is connected to the cold insulation block 242, and the lower end of the second support portion 243 is connected to the bottom plate 110. The setting of the cold insulation block 242 can effectively isolate the cold quantity on the inner tank 200 from being transmitted to the outer tank 100 through the legs 240, thereby improving the cold insulation efficiency of the intermediate energy storage tank.

[0058] In some other embodiments, the cold insulation block 242 may be made of fiberglass.

[0059] Refer to Figure 1 , in the present embodiment, a plurality of inner tanks 200 may be provided in the outer tank 100. The first communication pipe 310 is respectively connected to the plurality of inner tanks 200, and the second communication pipe 320 is respectively connected to the plurality of inner tanks 200, so that the plurality of inner tanks 200 are arranged in parallel, thereby increasing the total cold quantity storage capacity of the intermediate energy storage tank and enabling the plurality of inner tanks 200 to perform heat exchange simultaneously to improve the heat exchange efficiency.

[0060] In some embodiments, a plurality of inner tank connection groups may be provided in the outer tank 100. A plurality of inner tanks 200 may be connected in series within the inner tank connection group so that the cold quantity storage structure 220 can fully absorb and store the cold quantity in the cold air. The innermost upstream inner tanks 200 in the plurality of inner tank connection groups are respectively connected to the first communication pipe 310, and the innermost downstream inner tanks 200 in the plurality of inner tank connection groups are respectively connected to the second communication pipe 320, so that the plurality of inner tank connection groups are arranged in parallel, thereby improving the heat exchange efficiency of the cold air and reducing the working time of the intermediate energy storage tank.

[0061] In some other embodiments, two inner tanks 200 are provided within the inner tank connection group to reduce the working time of the intermediate energy storage tank while fully absorbing the cold quantity.

[0062] Refer toFigure 1 , in this embodiment, a ceiling 510 is provided inside the outer tank 100. The ceiling 510 is connected to the top cover 130 and extends horizontally. A plurality of accommodation holes 511 are formed in the ceiling 510, and the upper part of the inner tank 200 passes through the ceiling 510 to facilitate the welding assembly, inspection and maintenance by the staff.

[0063] In this embodiment, the intermediate energy storage tank may further include a heat insulation structure 400. The heat insulation structure 400 may include a suspended ceiling heat insulation layer 410, an inner tank heat insulation layer 420 and a filling layer 430. The suspended ceiling heat insulation layer 410 is disposed on the upper side of the ceiling 510, and the suspended ceiling heat insulation layer 410 covers the upper part of the inner tank 200 to insulate the upper part of the inner tank 200. The inner tank heat insulation layer 420 and the filling layer 430 are located on the lower side of the ceiling 510. The inner tank heat insulation layer 420 covers the outer peripheral wall of the inner tank 200. The filling layer 430 is filled between the heat insulation layer and the outer tank 100 to improve the cold insulation ability between the inner tank 200 and the outer tank 100 and prevent the cold quantity in the inner tank 200 from escaping.

[0064] In some embodiments, the suspended ceiling heat insulation layer 410 may be formed by combining a plurality of cotton blocks, so as to facilitate the assembly and disassembly of the suspended ceiling heat insulation layer 410, and thus facilitate the inspection and maintenance by the staff while ensuring the cold insulation effect of the inner tank 200.

[0065] In some embodiments, the inner tank heat insulation layer 420 may be a cylindrical cotton layer, and the cylindrical cotton layer covers the outer peripheral wall of the inner tank 200. The cylindrical cotton layer is limited and suspended outside the inner tank 200 by ropes.

[0066] In some embodiments, the filling layer 430 may be filled with cold insulation materials such as perlite sand to further improve the cold insulation efficiency between the inner tank 200 and the outer tank 100.

[0067] In this embodiment, the intermediate energy storage tank may further include a spiral ladder 520 and a top platform 530. The spiral ladder 520 is wound around the outer periphery of the outer tank 100 to facilitate the staff to enter the second manhole 131. The top platform 530 is a frame structure, and the top platform 530 covers outside the top cover 130 to facilitate the staff to climb and protect the top cover 130.

[0068] In this embodiment, the intermediate energy storage tank may further include a transportation track 540. The transportation track 540 is disposed inside the outer tank 100 and connected to the top cover 130, thereby facilitating the assembly and disassembly of various components inside the intermediate energy storage tank.

[0069] Refer to Figure 1, in this embodiment, when the first flow passage uses the cold storage function, the first end of the first connecting pipe 310 is connected to the cold absorption cavity of the vaporization structure, so that the cold air in the cold absorption cavity enters the first connecting pipe 310 through the first end of the first connecting pipe 310, and is input into the lower parts of the plurality of inner tanks 200 through the first connecting pipe 310.

[0070] The cold air flows from bottom to top in the inner tank 200. During the process of flowing from bottom to top, the cold air exchanges heat with the cold storage member 221, so that the cold storage member 221 can absorb and store the cold in the cold air. After the cold in the cold air is transferred to the cold storage member 221, it is heated into hot air, and the hot air is then discharged to the outside through the second connecting pipe 320.

[0071] When the first flow passage uses the cold release function, the second end of the second connecting pipe 320 is connected to the outside, and the hot air to be cooled outside is input into the upper part of the inner tank 200 through the second connecting pipe 320, and slowly flows from top to bottom in the inner tank 200.

[0072] During the process of the hot air flowing from top to bottom in the inner tank 200, the hot air exchanges heat with the cold storage member 221, so that the cold storage member 221 releases cold to the hot air. After the hot air receives the cold, it is cooled into cold air, and then is discharged to other structures through the first connecting pipe 310, so as to facilitate the recycling of the cold of the liquid cold source in the subsequent low-temperature liquefied storage tank.

[0073] Another solution for the flow passage of the intermediate energy storage tank:

[0074] Refer to Figure 1 , in this embodiment, the intermediate energy storage tank may include a first connecting pipe 310 and a second connecting pipe 320, so that the first connecting pipe 310, the inner tank 200 and the second connecting pipe 320 form a first flow passage, and the first flow passage only has the cold storage function.

[0075] The intermediate energy storage tank may further include a third connecting pipe 330 and a fourth connecting pipe 340. The second end of the third connecting pipe 330 is connected to the inner tank 200, and the first end of the third connecting pipe 330 passes through the outer tank 100 to be connected to the external environment to input the external hot air into the inner tank 200. The first end of the fourth connecting pipe 340 is connected to the inner tank 200, and the second end of the fourth connecting pipe 340 passes through the outer tank 100. The third connecting pipe 330, the inner tank 200 and the fourth connecting pipe 340 form a second flow passage, and the second flow passage has the cold release function to be able to output the cold air in the inner tank 200 to other structures.

[0076] When the first flow passage only has the cold storage function, the second flow passage is used for the inner tank 200 to release cold to cool the hot air into cold air and output the cold air in the inner tank 200.

[0077] In some embodiments, electric valves and temperature sensors are respectively provided on the third connecting pipe 330 and the fourth connecting pipe 340. The electric valves can respectively open and close the third connecting pipe 330 and the fourth connecting pipe 340. The temperature sensors can respectively detect the gas temperatures in the third connecting pipe 330 and the fourth connecting pipe 340.

[0078] The temperature sensors on the third connecting pipe 330 and the fourth connecting pipe 340 are both electrically connected to the control device, so as to be able to receive and display the temperature parameter data of the temperature sensors on the third connecting pipe 330 and the fourth connecting pipe 340. The electric valves on the third connecting pipe 330 and the fourth connecting pipe 340 can also be electrically connected to the control device, so that the control device can respectively control the opening and closing of the first connecting pipe 310 and the second connecting pipe 320.

[0079] In some embodiments, the first flow passage is opened and the second flow passage is closed, so that the cold quantity of the cold air can be stored in the inner tank 200 through the first flow passage. The first flow passage is closed and the second flow passage is opened, so that the second flow passage can supply the inner tank 200 to release cold quantity and cool the hot air.

[0080] Both the first flow passage and the second flow passage are closed to facilitate the intermediate energy storage tank to store cold quantity.

[0081] In other embodiments, both the first flow passage and the second flow passage are opened, so that the first flow passage and the second flow passage can simultaneously have the functions of cold quantity storage and cold quantity release, so as to improve the heat exchange efficiency of the intermediate energy storage tank.

[0082] Refer to Figure 1 , in this embodiment, when the intermediate energy storage tank absorbs and stores cold quantity, the first end of the first connecting pipe 310 is communicated with the cold quantity absorption cavity of the vaporization structure, so that the cold air in the cold quantity absorption cavity enters the first connecting pipe 310 through the first end of the first connecting pipe 310 and is input to the lower parts of the plurality of inner tanks 200 through the first connecting pipe 310.

[0083] The cold air flows from bottom to top in the inner tank 200. During the process of flowing from bottom to top, the cold air exchanges heat with the cold quantity storage member 221, so that the cold quantity storage member 221 can absorb and store the cold quantity in the cold air. After the cold quantity in the cold air is transferred to the cold quantity storage member 221, it is heated to hot air, and the hot air is then discharged to the outside through the second connecting pipe 320.

[0084] When the intermediate energy storage tank releases cold quantity, the first end of the third connecting pipe 330 is communicated with the outside, and the outside hot air is input to the upper part of the inner tank 200 through the third connecting pipe 330 and slowly flows from top to bottom in the inner tank 200.

[0085] During the process of hot gas flowing from top to bottom within the inner tank 200, the hot gas exchanges heat with the cold energy storage member 221, enabling the cold energy storage member 221 to release cold energy into the hot gas. After receiving the cold energy, the hot gas is cooled to cold gas, which is then discharged through the fourth communication pipe 340 into other structures to facilitate the recycling of the cold energy of the liquid cold source within the subsequent low-temperature liquefied storage tank.

[0086] Referring to Figure 1 , the present utility model further provides a cold energy recycling system for a low-temperature liquefied storage tank, which includes: the intermediate energy storage tank as described in any one of the above.

[0087] In this embodiment, the cold energy recycling system for the low-temperature liquefied storage tank may further include: a low-temperature liquefied storage tank (not shown in the figure), a vaporization structure (not shown in the figure), and an intermediate energy storage tank. The vaporization structure is connected to the low-temperature liquefied storage tank to be able to assist in vaporizing the liquid cold source within the low-temperature liquefied storage tank. The vaporization structure may include a cold energy absorption chamber, and the gas within the cold energy absorption chamber can absorb the cold energy released during the vaporization process of the liquid cold source to be cooled and form cold gas. Among them, the first end of the first communication pipe 310 can be connected to the cold energy absorption chamber, enabling the cold gas within the cold energy absorption chamber to enter the inner tank 200. The cold energy storage structure 220 can absorb and store the cold energy within the cold gas, enabling the cold gas to be heated to hot gas. The second communication pipe 320 can discharge the hot gas from the inner tank 200. The cold energy released during the vaporization process of the liquid cold source is stored within the intermediate energy storage tank, thereby being able to improve the cold energy recycling rate within the low-temperature liquefied storage tank.

[0088] In this embodiment, the cold energy recycling system for the low-temperature liquefied storage tank may further include: a compressor (not shown in the figure) and a liquefied air storage tank (not shown in the figure). The input end of the compressor can be connected to the first end of the first communication pipe 310. The input end of the liquefied air storage tank is connected to the compressor. When the external hot gas passes through the first flow path, the hot gas absorbs the cold energy within the inner tank 200 and is cooled to cold gas, which is then input into the compressor. The compressor compresses the cold gas into low-temperature liquefied air and outputs it into the liquefied air storage tank. The low-temperature liquefied air within the liquefied air storage tank can be vaporized and expanded for use in fields such as power generation.

[0089] The cold energy stored within the intermediate energy storage tank can be respectively input into multiple liquefied air storage tanks, thereby facilitating the transportation and utilization of the low-temperature liquefied air.

[0090] In some embodiments, the input end of the compressor can be connected to the second end of the fourth communication pipe 340, so that when the second flow path is opened for operation, the cold gas within the inner tank 200 can be output through the fourth communication pipe 340 into the compressor, thereby facilitating the compression to form a low-temperature liquefied storage tank and facilitating the divided use of the cold energy within the intermediate energy storage tank.

[0091] The above embodiments are only illustrative examples of the structure. The structures in each embodiment are not combined structures with fixed collocations. Without structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used. For example, the first connecting pipe, the second connecting pipe, the third connecting pipe, and the fourth connecting pipe can be opened simultaneously, so as to be able to input a large amount of hot air through the second connecting pipe and the third connecting pipe at the same time, and then output cold air through the first connecting pipe and the fourth connecting pipe at the same time.

[0092] Although the present application has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the present application can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be construed broadly within the spirit and scope defined by the appended claims. Therefore, all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An intermediate energy storage tank, which can absorb and store the cold energy generated during the vaporization of the liquid cold source in the low-temperature liquefied storage tank. It is characterized in that, Comprising: An outer tank; An inner tank disposed within the outer tank; a cold storage structure is provided within the inner tank, and the cold storage structure can exchange heat with cold air to absorb and store the cold in the cold air, and the cold storage structure can also exchange heat with hot air to release cold and cool the hot air; A heat insulation structure disposed between the outer tank and the inner tank to keep the inner tank cold; A first connecting pipe, the first end of which penetrates the outer tank for connection with other structures, and the second end of the first connecting pipe is connected to the inner tank; A second connecting pipe, the first end of which is connected to the inner tank, and the second end of the second connecting pipe penetrates the outer tank for connection with the external environment; Wherein, the first connecting pipe, the inner tank and the second connecting pipe form a first flow path; the first flow path can store the cold of the cold air in the inner tank, or The first flow path can store the cold of the cold air in the inner tank and the inner tank can release cold and cool the hot air.

2. The intermediate energy storage tank according to claim 1, characterized in that The cold storage structure includes a plurality of cold storage members, and there are ventilation gaps between the plurality of cold storage members for the gas in the inner tank to flow through.

3. The intermediate energy storage tank according to claim 2, characterized in that, The cold storage structure further includes a partition member for accommodating the plurality of cold storage members; a plurality of mesh holes are formed in the peripheral side wall of the partition member.

4. The intermediate energy storage tank according to claim 3, characterized in that, The inner tank further includes a plurality of support columns arranged at intervals, one ends of the plurality of support columns are all connected to the inner peripheral wall of the inner tank, and the other ends of the plurality of support columns are all connected to the partition member, so that there is an interval between the partition member and the inner peripheral wall of the inner tank.

5. The intermediate energy storage tank according to claim 2, characterized in that, A spiral extension pipe is further provided in the inner tank, the first end of the spiral extension pipe is connected to the second end of the first connecting pipe, the second end of the spiral extension pipe extends spirally among the plurality of cold storage members, and a plurality of communication holes are formed in the peripheral side wall of the spiral extension pipe.

6. The intermediate energy storage tank according to claim 1, wherein The second end of the first connecting pipe is connected to the lower part of the inner tank, and the first end of the second connecting pipe is connected to the upper part of the inner tank.

7. The intermediate energy storage tank according to claim 1, characterized in that, A ceiling is provided in the outer tank, the ceiling is connected to the upper part of the outer tank, and the ceiling extends in the horizontal direction; a plurality of accommodation holes are formed in the ceiling, and the upper part of the inner tank passes through the ceiling; The heat insulation structure includes a suspended ceiling heat insulation layer, an inner tank heat insulation layer and a filling layer. The suspended ceiling heat insulation layer is provided on the upper side of the ceiling and covers the upper part of the inner tank; the inner tank heat insulation layer and the filling layer are located on the lower side of the ceiling; the inner tank heat insulation layer covers the outer peripheral wall of the inner tank; the filling layer is filled between the heat insulation layer and the outer tank.

8. The intermediate energy storage tank according to claim 1, wherein, A plurality of the inner tanks are provided in the outer tank, the first connecting pipe is respectively connected to the plurality of inner tanks, and the second connecting pipe is respectively connected to the plurality of inner tanks, so that the plurality of inner tanks are arranged in parallel; or A plurality of inner tank connection groups are arranged inside the outer tank, and a plurality of inner tanks are connected in series within each inner tank connection group; the uppermost upstream inner tanks in the plurality of inner tank connection groups are respectively connected to the first connecting pipe, and the lowermost downstream inner tanks in the plurality of inner tank connection groups are respectively connected to the second connecting pipe, so that the plurality of inner tank connection groups are arranged in parallel.

9. The intermediate energy storage tank according to claim 1, characterized in that, When the first flow path is used for storing the cold quantity of cold air in the inner tank, The intermediate energy storage tank further includes a third connecting pipe and a fourth connecting pipe. The second end of the third connecting pipe is connected to the inner tank, and the first end of the third connecting pipe passes through the outer tank to communicate with the external environment, so as to input external hot air into the inner tank; the first end of the fourth connecting pipe is connected to the inner tank, and the second end of the fourth connecting pipe passes through the outer tank; Wherein, the third connecting pipe, the inner tank and the fourth connecting pipe form a second flow path, and the second flow path is used for the inner tank to release cold quantity to cool hot air into cold air and output the cold air in the inner tank.

10. A cold energy reuse system for a cryogenic liquefied storage tank, characterized in that, Including: The intermediate energy storage tank according to any one of claims 1 to 9.

11. The cold energy reuse system of the cryogenic liquefied storage tank according to claim 10, characterized in that, Further including: A cryogenic liquefied storage tank; A vaporization structure, which is connected to the cryogenic liquefied storage tank to assist in vaporizing the liquid cold source in the cryogenic liquefied storage tank; The vaporization structure includes a cold quantity absorption cavity, and the gas in the cold quantity absorption cavity can absorb the cold quantity released during the vaporization process of the liquid cold source to cool down and form cold air; Wherein, the first end of the first connecting pipe can be connected to the cold quantity absorption cavity, so that the cold air in the cold quantity absorption cavity enters the inner tank; the cold quantity storage structure can absorb and store the cold quantity in the cold air, so that the cold air is heated into hot air; the second connecting pipe can discharge the hot air in the inner tank.

12. The cold energy reuse system of the cryogenic liquefied storage tank according to claim 11, wherein Further including: A compressor, the input end of which can be connected to the first end of the first connecting pipe; A liquefied air storage tank, the input end of which is connected to the compressor; Wherein, when the external hot air passes through the first flow path, the hot air absorbs the cold quantity in the inner tank and cools down to cold air, and then the cold air is input into the compressor; the compressor compresses the cold air into cryogenic liquefied air and outputs it into the liquefied air storage tank.

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