Butylene glycol removal tower process waste heat recovery system for refining crude ethylene glycol

The utility model discloses a butanediol removal tower process waste heat recovery system for a crude ethylene glycol refining system, which comprises a butanediol removal tower, and a process gas evaporation pipeline of the butanediol removal tower is connected with a process gas phase inlet of a waste heat boiler assembly. A process liquid phase outlet of the waste heat boiler assembly is connected with a liquid inlet of the reflux tank assembly through a process liquid phase pipeline, a liquid outlet of the reflux tank assembly is connected with a process liquid phase reflux pipeline of the butanediol removal tower, and a condensate inlet of the waste heat boiler assembly is connected with a liquid outlet of the condensate tank assembly; a liquid inlet of the condensate tank assembly is connected with a desalted water pipe network, and a waste heat steam pipeline of the waste heat boiler assembly is connected with a byproduct steam main pipe network; the device has the advantages that a large amount of cir