Pipeline system for low-temperature methanol washing replacement

The utility model belongs to the technical field of chemical engineering, and relates to a low-temperature methanol washing system, in particular to a pipeline system for replacing low-temperature methanol washing, which comprises a semi-lean methanol raw material pipe, a spraying device and a raw material replacing pipeline, the raw material replacing pipeline comprises a lean methanol raw material pipe and a heat exchange device, and the semi-lean methanol raw material pipe is connected with the spraying device. The lean methanol raw material pipe is connected with the spraying device through the heat exchange device; on one hand, the standby methanol pipeline is additionally arranged, it is guaranteed that materials can be continuously supplied to the spraying device when an original pipeline cannot work normally, meanwhile, methanol comes from production, the use condition can be met after the methanol is cooled through the heat exchange device, energy is saved, and meanwhile the cost can be reduced. 本实用新