A molten salt cryogenic tank with a liquid level following annular cavity

By setting a follow-up annular cavity and a stirrer to coordinate the flow field at the liquid surface of the cryogenic tank, the problems of uneven temperature and slow flow in the liquid surface area are solved, achieving stable circulation in the molten salt liquid surface area and reducing the risk of crystallization, thus improving the operational safety of the system.

CN121804246BActive Publication Date: 2026-08-04SHANXI FUDE HUIZHI NEW ENERGY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202610255305.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-03-04
Publication Date
2026-08-04
Estimated Expiration
2046-03-04

AI Technical Summary

Technical Problem

The temperature inhomogeneity, slow flow, and crystallization risk in the molten salt surface area of ​​existing cryogenic tanks are difficult to control effectively. Existing heating and stirring methods are also difficult to apply effectively to the surface area, resulting in unstable system operation.

Method used

An annular cavity that can move up and down with changes in liquid level is set at the surface of the molten salt. Combined with a stirrer and a flow impeller, a synergistic flow field is formed. The annular cavity floats on the surface of the liquid and guides the molten salt to participate in the overall circulation flow, thereby reducing temperature stratification and flow stagnation.

Benefits of technology

It improves the temperature uniformity of the liquid surface area, reduces the risk of molten salt crystallization, and enhances the operational safety and reliability of the cryogenic tank.

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Abstract

This invention belongs to the field of molten salt energy storage technology, specifically relating to a molten salt cryogenic tank with a liquid level-following annular cavity. The molten salt cryogenic tank includes a tank body and a stirrer. The stirrer includes a motor mounted on the top of the tank body, a drive shaft extending into the tank body, and a flow impeller mounted on the lower end of the drive shaft. An inlet and an outlet are provided on the side wall of the tank body. An annular cavity is provided at the molten salt surface. The annular cavity has a hollow structure, and its overall density is less than that of the molten salt, allowing it to float on the molten salt surface and move up and down with changes in the molten salt level. A central opening in the annular cavity allows the drive shaft and flow impeller to pass through. This invention, through continuous regulation of the molten salt near the liquid surface by the annular cavity, weakens the liquid surface temperature stratification and flow stagnation phenomena, raises the minimum temperature inside the cryogenic tank, reduces the risk of molten salt crystallization in the liquid surface area, and improves the safety and reliability of the cryogenic tank operation.
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