Fused salt stop device, using method and application

Abstract

The invention discloses a fused salt stop device, a using method and application. The stop device comprises a sealing container used for loading fused salt, a heating system, a first guide pipe and asecond guide pipe. The first guide pipe and the second guide pipe penetrate through the inner wall face of the sealing container from the outer wall face of the upper end of the sealing container respectively; the height of the bottom of the first guide pipe from the bottom face of an inner cavity of the sealing container is shorter than the distance between the bottom of the first guide pipe andthe bottom of the second guide pipe; when the bottom of the second guide pipe is higher than the liquid level of the fused salt or the fused salt is solidified from the liquid state, stop is achieved;when the bottom of the second guide pipe is lower than the liquid level of the fused salt and the fused salt conveyed into the container by means of the first guide pipe is in a liquid state, communication is achieved. According to the fused salt stop device, the feature that the fused salt is well combined with the inner wall of the container after being solidified is utilized, the container with a large space is designed in combination with a large height difference between the guide pipes, complete stop of the fused salt can be achieved, and rapid recovery of communication can be ensured;the airtightness is good, and the service life is long; the phenomenon that fused salt is stuck in a valve and other devices due to solidification after volatilization can be avoided.

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...

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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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