Patent ID: 10852280

Abstract:
An apparatus and method for reclaiming and filtering helium for reuse in analytical instruments. The method includes inputting the output gas stream from a gas chromatograph split vent and subjecting the input gas stream to a mini-particulate filter. The gas stream is also subjected to a molecular sieve filter and a finishing filter to isolate the helium carrier gas. The finishing filter removes trace contaminants that are not caught in the previous filters. The method utilizes a pump and controller to maintain a constant pressure, preferably between 80 and 100 psi, to avoid back-flow contamination and to ensure movement of the gas stream through the filters. Additionally, the use of a relief valve prevents back pressure from entering into the gas chromatograph. The filtered helium gas may be stored for future use or re-introduced directly to the input carrier gas stream of a gas chromatograph.