Methanol washing energy-saving system

The utility model discloses a methanol washing energy-saving system which comprises a steam turbine, a first sulfur-rich and carbon-rich methanol liquid pipeline, a second sulfur-rich and carbon-rich methanol liquid pipeline, a pressure stabilizing tank and a conveying pipeline, the pressure stabilizing tank is arranged, sulfur-rich and carbon-rich methanol liquid is divided into two groups of pipelines and introduced into the pressure stabilizing tank at the same time, and the second sulfur-rich and carbon-rich methanol liquid pipeline is in high pressure. After the first sulfur-rich methanol liquid pipeline and the first carbon-rich methanol liquid pipeline do work on the steam turbine, the pressure is reduced, after the first sulfur-rich methanol liquid pipeline and the first carbon-rich methanol liquid pipeline enter the pressure stabilizing tank, high pressure drives low pressure to move, so that the purpose of reducing the pressure at the pressure reducing valve is achieved, meanwhile, high-pressure sul