Synthesis gas leakage online detection and treatment process

The invention relates to a synthesis gas leakage online detection and treatment process. A treatment system adopted by the synthesis gas leakage online detection and treatment process comprises a cooler and a gas-liquid separation tank; the gas-liquid separation tank connected with the cooler is arranged; the leakage degree of the synthesis gas is judged through a descending position of the liquidlevel in the gas-liquid separation tank with the assistance of pressure detection measures; the descending speed of the liquid level can visually reflect the leakage severity degree of the synthesisgas, and therefore detection of different leakage working conditions of the synthesis gas is met. Aiming at different synthesis gas leakage working conditions, whether each liquid pipeline and each gas pipeline are cut off or not are timely processed, and the gas leakage degree can be judged and can be timely treated on line, so that unnecessary shutdown maintenance is avoided, the economic loss is reduced, meanwhile, the