Energy -saving methyl alcohol circulation separation and purification system

The utility model provides an energy -saving methyl alcohol circulation separation and purification system, including first rectifying column, first condenser, first reboiler, the second reboiler, the second rectifying column, the second condenser, the third condenser, the groove of distilling off, a deaeration section of thick bamboo, the export of the liquid phase of the tower cauldron of first rectifying column still is connected with the liquid phase inlet of second reboiler, the gas -phase inlet of second reboiler and the gas exports of the top of the tower of second rectifying column are connected, use the high temperature gaseous phase methyl alcohol that utilizes second rectifying column top of the tower to provide heat exchange medium as the second reboiler, because methyl alcohol is at the in -process of separation, top of the tower output from the second rectifying column, a second condenser, heat in the gaseous phase methyl alcohol is virtually by extravagant like this, through the utility model d