The liquid ring pump units were mainly used as the obtaining equipment for vacuum distillation in petrochemical distillation process.Every distillation column having a thermo-sensitive medium must use the low pressure, atmospheric and vacuum distillation. Effluent gas generated by atmospheric and vacuum distillation, using absorption -liquid ring pump supercharger - torch combustion not only met the safety, environmental protection, occupational health provisions of the state and the industry, and the absorption tower, liquid ring pumps could be arranged closely in the device, but also had the characteristics of low equipment investment and administrative expenses, no increase of personnel quota. Few months  operation could prove that absorption-liquid ring pump supercharger - torch combustion technology has solved the difficult problem of effluent gas of thermal sensitive materials, and the technology was worth to promote use on a similar device.