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

A shut-off, molten salt technology, applied in valve details, valve devices, valve heating/cooling devices, etc., can solve the problems of complex operation, short service life, complex structure, etc., and achieve large heating area and long service life. , the effect of uniform heating

Active Publication Date: 2021-03-05
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

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Embodiment 1

[0050] 1. A molten salt cut-off device is provided in this embodiment, such as figure 1 As shown, it includes a sealed container 1 for loading molten salt 6, an electric heating system 2 for heating the outer wall of the sealed container 1; a first conduit 3 and a second conduit 4; Insulation layer 5 for the outer layer of system 2. The materials used in the molten salt cut-off are all high temperature resistant materials.

[0051] Wherein, the top of the sealed container 1 is provided with a sealing member 13 matching the sealed container 1 , and the sealing member 13 includes a sealing flange 14 and a sealing ring 15 . The airtight container 1 comprises a coaxially arranged neck chamber 11 and a bottom chamber 12 for storing molten salt, the cross sections of the neck chamber 11 and the bottom chamber 12 are circular, and the neck chamber 11 The inner diameter is 50 mm and the inner diameter of the bottom chamber 12 is 100 mm. Wherein the electric heating system 2 is used...

Embodiment 2

[0058] This embodiment provides an application of the above-mentioned molten salt cut-off device in a FLiNaK molten salt production system.

[0059] like figure 2 As shown, the molten salt cut-off device in this embodiment is set in the FLiNaK molten salt production system, which specifically includes the following steps: (1) setting the temperature of each process section according to the process requirements, including feeding-pretreatment tank, each bubbling Reactor, temporary storage-splitter tank, temporary storage tank, storage tank, each molten salt cut-off device and conduits along the way; confirm that the working status of each molten salt cut-off device is "cut off", that is, the molten salt in the molten salt cut-off device is solid (2) inject the material to be purified of LiF, NaF, and KF ternary mixed molten salt from the feed port into the feed-pretreatment tank, and obtain the liquid material after pretreatment; (3) turn on the heat source to make The molten...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K13/00F16K49/00
CPCF16K13/00F16K49/002
Inventor 汤睿赵素芳谢雷东王建强赵乾坤傅杰申淼
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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