Combustion-supporting gas supply system for flame ion detector

The utility model relates to the technical field of air separation, in particular to a combustion-supporting gas supply system for a flame ion detector, which is connected between an air separation device and the flame ion detector. The combustion-supporting gas supply system comprises a purifier, a hydrocarbon filter and an air purification unit which are sequentially connected between the air separation device and the flame ion detector; synthetic air generated by the air separation device enters the combustion-supporting gas supply system from the purifier and sequentially passes through the hydrocarbon filter and the air purification unit, so that the synthetic air filtered for multiple times serves as combustion-supporting gas to enter the flame ion detector. And the process that various steel cylinder gases need to be purchased and different steel cylinder gases need to be combined and configured into the combustion-supporting gas is also avoided. The purchase cost of the high-purity steel cylinder gas