煤焦油中喹啉不溶物的分离方法

为了提高煤焦油的质量,分析了煤焦油中喹啉不溶物(QI)的性质及其危害,并根据分离原理分别对比分析了以下方法:自由沉降分离法原理简单,操作简便,但净化效率低;热溶分离过滤法虽然效率高,但难以推广使用;高温离心分离法大大提高了脱除率,应用前景较好;溶剂抽提脱除率较高,但需要大量的溶剂。根据实践经验提出在配煤炼焦环节通过优化配煤质量、改进工艺等措施可以最大程度地降低QI含量。 In order to improve coal tar quality,analyze the properties of quinoline insolubles(QI) in coal tar and its damage.Based on separation mechanism,a series of separation methods are respectively introduced.The mechanism of free setting method is not complex,as well as its operation,however,its separation efficiency is lower.Contrary to thermal dissolution separation method,but it's difficult to extend for some reason.High temperature centrifugal separation method not only greatly improves the removal rate of QI,also has excellent application prospect.Although solvent extraction can remove majority of QI,but it consumes large amounts of solvent.Through practical experience,it has been known that optimizing coal blending quality,transforming technique during coking process could remove QI to a large extent