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Method for preparing sulfur hexafluoride for high-voltage circuit-breaker

A high-voltage circuit breaker, sulfur hexafluoride technology, applied in the direction of sulfur and halogen compounds, etc., can solve the problems of complex preparation method or purification method, unable to adapt to the rapid growth of GDP, unusable sulfur hexafluoride, etc. Satisfying needs, high purity effect

Active Publication Date: 2015-07-15
JIYUAN POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfur hexafluoride can only remain gaseous when the temperature is higher than 45°C. Under normal use conditions, it may be liquefied. Therefore, sulfur hexafluoride cannot be used at too low temperature and too low pressure.
In the above patent documents, both the preparation method and the purification method are relatively complicated, and cannot adapt to the rapid growth of GDP

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Airtight containers, reaction tanks, and cleanrooms are first evacuated with nitrogen, followed by the following steps:

[0023] 1) Heating sulfur with a purity of 99.95% to 120°C in a closed container for liquefaction;

[0024] 2) Draining the liquid sulfur into the closed reaction tank, spraying downward from the top of the closed reaction tank, and releasing 99.8% fluorine gas into the gas distribution tray from the bottom of the closed reaction tank;

[0025] 3) Fill the reacted gas into an airtight container, and discharge it into the clean room after being exposed to sulfur;

[0026] 4) After the gas in the purification room is condensed by a tube condenser, it is then treated with a membrane to obtain a finished product of sulfur hexafluoride for high-voltage circuit breakers. The temperature in the purification room is maintained at -60°C.

[0027] After testing, the purity of sulfur hexafluoride is 99.94%, the nitrogen content is 0.02%, and the water content i...

Embodiment 2

[0029] Airtight containers, reaction tanks, and cleanrooms are first evacuated with nitrogen, followed by the following steps:

[0030] 1) Heating sulfur with a purity of 99.95% to 180°C in a closed container for liquefaction;

[0031] 2) Draining the liquid sulfur into the closed reaction tank, spraying downward from the top of the closed reaction tank, and releasing 99.8% fluorine gas into the gas distribution tray from the bottom of the closed reaction tank;

[0032] 3) Fill the reacted gas into an airtight container, and discharge it into the clean room after being exposed to sulfur;

[0033] 4) After the gas in the purification room is condensed by a tube condenser, it is then treated with a membrane to obtain a finished product of sulfur hexafluoride for high-voltage circuit breakers. The temperature in the purification room is maintained at -55°C.

[0034] After testing, the purity of sulfur hexafluoride is 99.98%, the nitrogen content is 0.01%, and the water content i...

Embodiment 3

[0036] Airtight containers, reaction tanks, and cleanrooms are first evacuated with nitrogen, followed by the following steps:

[0037] 1) Heating sulfur with a purity of 99.95% to 150°C in a closed container for liquefaction;

[0038] 2) Draining the liquid sulfur into the closed reaction tank, spraying downward from the top of the closed reaction tank, and releasing 99.8% fluorine gas into the gas distribution tray from the bottom of the closed reaction tank;

[0039] 3) Fill the reacted gas into an airtight container, and discharge it into the clean room after being exposed to sulfur;

[0040] 4) After the gas in the purification room is condensed by a tube condenser, it is then treated with a membrane to obtain a finished product of sulfur hexafluoride for high-voltage circuit breakers. The temperature in the purification room is maintained at -58°C.

[0041] After testing, the purity of sulfur hexafluoride is 99.96%, the nitrogen content is 0.01%, and the water content i...

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PUM

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Abstract

The invention discloses a method for preparing sulfur hexafluoride for a high-voltage circuit-breaker. The method is characterized by comprising the following steps: (1) heating sulfur to 120-180 DEG C in a closed container for continuous liquidation; (2) draining liquid sulfur into a closed reaction tank, spraying the liquid sulfur downwards from the top of the closed reaction tank, and meanwhile releasing fluoride into a gas distributing disk of the bottom of the closed reaction tank; (3) filling the reacted gas into the closed container, and expelling into a decontamination chamber after contacting sulfur; (4) after condensing the gas in the decontamination chamber through a tubular condenser, and conducting membrane treatment to obtain a sulfur hexafluoride finished product for the high-voltage circuit-breaker. Compared with the prior art, the method provided by the invention is simple, can conduct continuous production, has high efficiency and high purity, and can perfectly meet the need of the high-voltage circuit-breaker.

Description

technical field [0001] The invention relates to a method for preparing sulfur hexafluoride for high-voltage circuit breakers. Background technique [0002] Sulfur hexafluoride has good electrical insulation performance and excellent arc extinguishing performance. Its electric strength is 2.5 times that of nitrogen under the same pressure, its breakdown voltage is 2.5 times that of air, and its arc extinguishing ability is 100 times that of air. It is a new generation of ultra-high voltage insulating dielectric material superior to that between air and oil. Sulfur hexafluoride is used in circuit breakers, high-voltage transformers, gas-enclosed combined capacitors, high-voltage transmission lines, transformers, etc. due to its good insulation performance and arc-extinguishing performance. Electronic-grade high-purity sulfur hexafluoride is an ideal electronic etchant, which is widely used in the field of microelectronics technology. As a refrigerant in the refrigeration ind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/45
Inventor 金翼赵锋
Owner JIYUAN POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER