A molten salt cut-off device and method of use and application

Abstract

The invention discloses a molten salt cut-off device and its use method and application. The cut-off device includes a sealed container for containing molten salt; a heating system; a first conduit and a second conduit; the first conduit and the second conduit are separated from the sealed The outer wall surface of the upper end of the container penetrates the inner wall surface; the bottom end of the first conduit is shorter than the bottom end of the second conduit from the bottom of the inner cavity of the sealed container; when the bottom end of the second conduit is higher than the molten salt liquid level, Or when the molten salt is solidified from the liquid state, it is cut-off; when the bottom end of the second conduit is lower than the liquid level of the molten salt, and the molten salt transported into the container by the first conduit is in a liquid state, it is connected. The cut-off device in the present invention utilizes the characteristics of good bonding with the inner wall of the container after the molten salt is solidified, and a container with a large space is designed, and the height difference between the conduit and the conduit can realize the complete cut-off of the molten salt and ensure rapid recovery Connectivity; good sealing; long service life; there will be no jamming phenomenon caused by solidification after volatilization of molten salt in valves and other devices.

Description

technical field [0001] The invention specifically relates to a molten salt cut-off device, its use method and application. Background technique [0002] In the fields of thermal energy comprehensive utilization, nuclear energy, and chemical industry, it is necessary to transport high-temperature molten salts through pipelines, such as fluoride molten salts, chloride molten salts, nitrates, sulfates, carbonates, etc. In order to achieve molten salt diversion, merging or flow direction switching, a stopper is required. High-temperature molten salts are highly corrosive and cannot be in contact with air. Most high-temperature molten salts will increase their corrosiveness in contact with air. [0003] In the prior art, most of the devices for realizing molten salt cut-off are valves with complex structures. For example, the Chinese patent document CN109737210A discloses a high-temperature molten salt pipeline valve, which includes a bracket and a valve body connected to the b...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the valves used for molten salt cut-off in the prior art, which have complex structure, difficult manufacture, prone to jamming caused by condensation of molten salt steam, easy to fatigue, and short service life; or Using the rapid solidification and melting of molten salt in the pipeline to achieve cut-off and connection requires relatively harsh conditions and complicated operations, and when the inner diameter of the molten salt pipeline is too large, there is a defect that it is difficult to quickly achieve cut-off and connection every time.

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