CAJ | 학술논문

为了优化操作参数，利用Aspen plus的NRTL热力学模型对以N,N-二甲基乙酰胺为萃取剂的苯-环己烯-环己烷三元物系的萃取精馏分离工艺进行了模拟。确定了第一萃取精馏塔的最佳工艺条件，当此塔采用36块理论板数，原料进料位置在第12块理论板处，溶剂进料位置在第5块理论板处，回流比为2.33，溶剂比为3.2，溶剂进料温度为65℃时，全塔满足分离工艺要求，塔釜产物环己烯和环己烷的总质量分数小于0.01%，塔釜苯的质量回收率大于99.9%，塔顶产物苯的质量分数小于0.01%，并且能耗得到降低。
위료우화조작삼수，이용Aspen plus적NRTL열역학모형대이N,N-이갑기을선알위췌취제적분-배기희-배기완삼원물계적췌취정류분리공예진행료모의。학정료제일췌취정류탑적최가공예조건，당차탑채용36괴이론판수，원료진료위치재제12괴이론판처，용제진료위치재제5괴이론판처，회류비위2.33，용제비위3.2，용제진료온도위65℃시，전탑만족분리공예요구，탑부산물배기희화배기완적총질량분수소우0.01%，탑부분적질량회수솔대우99.9%，탑정산물분적질량분수소우0.01%，병차능모득도강저。
To optimize operation conditions, the NRTL thermodynamic model in Aspen Plus was used to simulate the extractive distillation process of benzene (BZ)-cyclohexene (HE)-cyclohexane (HA) system with N,N-dimethyl acetamide as extractant. The optimum operation parameters for the first extractive distillation column were determined as follows: theoretical stage number of 36, feedstock feeding at stage 12, solvent feeding at stage 5, reflux ratio of 2.33, solvent/feedstock mass ratio of 3.2 and solvent inlet temperature of 65℃. Under above optimized conditions, the requirement for industrial separation of BZ-HE-HA could be satisfied-the total mass fraction of HE and HA in the column bottom product is lower than 0.01%, the recovery rate of BZ is over 99.9%and the mass fraction of BZ in the column top product is below 0.01%, and the energy consumption could be reduced.