US 6,004,377 A · System for collecting and refining SF.sub.6 gas and method therefor

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.

Claims7

Dependent claims

A method of collecting and refining SF.sub.6 gas, the method comprising the steps of:

removing impurities from SF.sub.6 gas from a gas insulated machine by averaging a flow rate of the SF.sub.6 gas and letting the SF.sub.6 gas flow through a first filter filled with a dry adsorbent;
adsorbing and removing by-product gases by a second filter filled with a dry adsorbent;
and
collecting the SF.sub.6 gas separated by said second filter by cooling and liquefying the SF.sub.6 gas.

1 more element

Dependencies are inferred from the claim text.

System for collecting and refining SF.sub.6 gas and method therefor

Life of this patent

System for collecting and refining SF.sub.6 gas and method therefor

Life of this patent

Abstract

Claims7