本文要介绍的是由日本引进的某石油化纤厂的芳烃抽提装置的溶剂回收塔中定组成控制系统。由催化重整来的半成品在抽提塔中用溶剂(环丁砜)将其中的芳烃溶解而成富溶剂。富溶剂送入汽提塔将大部分溶剂汽提出来,余下的抽出液的芳烃中还带有少量的溶剂,所以还要送到回收塔进一步分离芳烃和溶剂。要求是尽量分离出目的产品芳 This article describes the control system of the solvent recovery tower of aromatics extraction unit imported from Japan by a petrochemical fiber plant. The semifinished product from catalytic reforming uses a solvent (sulfolane) to dissolve the aromatics therein into a rich solvent. The rich solvent is fed to the stripper to strip most of the solvent and the remaining extract contains a small amount of solvent in the aromatics, so it is also sent to the recovery column for further separation of aromatics and solvents. Requirements is to try to separate the target product Fang