| 摘要 |
<p>A gas recovery method and apparatus for the recovery and storage of a gas from a gas enclosure or circuit particularly for the recovery of sulphur hexafluoride (SF6) from the arc chamber of a high voltage/current circuit breaker. A gas bottle is connected via quick connect coupling and a non-return valve to the gas circuit or enclosure. The gas bottle is immersed in a liquid nitrogen environment in a Dewar flask thereby generating a self pumping action as the sulphur hexafluoride liquifies (or solidifies) within the gas bottle due to the temperature of the liquid nitrogen (-196 DEG C.) being well below the phase change temperature of the sulphur hexafluoride over the range of encountered vapor pressures. When the gas has been recovered, it is stored in the gas bottle which is returned to ambient temperature by removal from the liquid nitrogen and/or by immersion in a heated bath. The gas bottle is reconnected to the gas circuit when recharging of the circuit with the recovered SF6 is required.</p> |
