System for collecting and refining SF.sub.6 gas and method therefor
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United States of America Patent
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-
Dec 21, 1999
Grant Date -
N/A
app pub date -
Jun 16, 1998
filing date -
Jun 20, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
SF.sub.6 gas is collected from the inside of a gas insulated machine during maintenance and inspection and is refined. Compositions of the refined SF.sub.6 gas are analyzed and confirmed to be reusable at the site. In the process of SF.sub.6 gas collecting and refining, acidic gases are neutralized and removed by a dry method using filters and the refined SF.sub.6 gas is collected in a collecting tank. In particular, after the refining, the composition of the collected SF.sub.6 gas is measured and confirmed by analysis equipment to quantitatively confirm whether or not the refined SF.sub.6 gas is reusable.
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