焦化粗苯加氢精制典型工艺及产渣剖析研究

在对国内焦化粗苯精制工艺应用现状介绍的基础上,剖析了主流粗苯加氢工艺的异同点,对粗苯加氢过程中残渣的产生节点、种类和性质以及残渣的主要处理处置方式进行了概括与总结。分析结果表明,目前国内粗苯加氢主要采用萃取蒸馏低温加氢(K.K法)和溶剂萃取低温加氢两种工艺,在粗苯加氢精制过程中共产生蒸馏副产物、废催化剂、溶剂再生渣、白土渣等四种类型,共八种残渣,除三种蒸馏副产物可作为产品出售外,其它均为危险废物,产生系数小,主要由危废企业回收处置。

Analysis on Typical Process Flows and Residues of Coking Benzol Hydrorefining

Based on introduction of current domestic application of coking benzol refining, the process flows of benzol hydrorefining are compared and analyzed. The process points at where the residues are produced are pointed out. Furthermore, the physical and chemical characteristics, the methods of utilization and treatment are also summarized. The analytical results show that there are two main benzol hydrorefining processes currently applied in China, one is the low temperature hydrorefining process with extractive distillation （ K. K method）, and the other is the low temperature hydrorefining process with solvent extraction. There are four kinds of residues produced in hydrorefining, including distilled byproducts, waste catalysts, residue of solvent reclamation and waste clay. All other residues are hazardous wastes which are disposed by hazardous waste companies, except distilled byproducts sold as products.