连续减压精馏分离晶体硅切割废液中多元醇组分的研究

Research on the Separation of Polyalcohol Component from the Crystalline Silicon Cutting Waste Liquid by Continuous Vacuum Distillation

设计了三塔连续减压精馏分离回收晶体硅切割废液中乙二醇、二甘醇、三甘醇、四甘醇等多元醇组分的工艺路线,通过正交实验,探讨了操作压力、塔板数、回流比、进料位置等因素对每个塔产品纯度及收率的影响,得到了优化的精馏塔操作工艺参数,为该工艺的工业化设计提供了基础数据.

A process route is designed to separate and recycle the polyalcohol component from the crystalline silicon cutting waste liquid by continuous vacuum distillation with three-columns in series. The effects of the stage numbers of distillation column, pressure, reflux ratio, and the number of feed stage on product purity are investigated with the orthogonal experiment,respectively. The obtained optimized results provide the fundamental guide for the theoretical study and industrialized application.