| 摘要 |
This invention is directed to a three stage process for recovering and purifying a gas, such as contaminated helium from a cold spray coating process, and a system for using the three stage process. The steps include a ) introducing a gas from a chamber to a particulate removal apparatus to form a particulate-free gas, and recycling a first portion of the particulate-free gas to the chamber; b) passing a second portion of the particulate-free gas to a first compressor prior to passing a selective gas purification membrane to form a purified gas and a exhaust gas, and passing the purified gas to mix with the first portion of particulate-free gas to the chamber; and c) passin g a third portion of the particulate-free gas to a liquid separator to form a liquid-free gas, and recycling the liquid-free gas back to the chamber.</SDO AB>
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