本发明涉及一种从氯醇法环氧丙烷废液中提取1,2-二氯丙烷的工业装置和连续精馏方法。环氧丙烷废液经过精馏,逐级冷凝再精馏再冷凝,分离后得到1,2-二氯丙烷产品无色透明、无刺激性气味,纯度可达95-99%(wt),收率90-95%,设备无腐蚀。本发明采用连续精馏工艺,不需加入共沸剂水,避免设备腐蚀的问题,同时,精馏过程连续运行,生产效率 The present invention relates to an industrial plant for the extraction of 1,2-dichloropropane from a chlorohydrin process propylene oxide effluent and to a continuous rectification process. The propylene oxide waste liquid is rectified, condensed, rectified and then condensed, and then the 1,2-dichloropropane product is obtained to be colorless, transparent and odorless with a purity of 95-99% (wt) Rate of 90-95%, no corrosion equipment. The invention adopts the continuous rectification process, does not need to add the entrainer water, avoids the problem of equipment corrosion, meanwhile, the rectification process runs continuously, the production efficiency