【摘要】 采用废剥离液为原料,选择NRTL热力学方法,根据设计指标确定了工艺流程:先蒸发脱除重组分,再进脱轻塔脱除轻组分,最后在成品塔中完成精制。选择两塔的理论板数作为操作变量,应用均匀设计试验原理确定了7组试验条件,又通过流程模拟软件对所建立的模型进行了计算。选择1st Opt软件数据处理系统进行多项式逐步回归分析得到操作变量与投资成本、运行成本和项目总成本之间的数学模型关系,同时利用遗传算法进行了优化,并得到项目总成本最低时的模型参数为:脱轻塔理论塔板数X1=6,成品塔理论板数X2=10。根据优化结果,进行了蒸发器和精馏塔的水力学计算与优化设计,设计出满足要求的剥离液精馏工艺成套装置,并在实际开车过程中,产品的水分含量为0.08%(质量分数),且产品收率达到93.3%,均高于设计指标。更多还原

【Abstract】 The simulation calculation model was established for the waste stripping solution distillation process by using Aspen Plus software,and the NRTL thermodynamic method was chosen. Heavy components were removed by the evaporator firstly,and then the light component was removed in light column. Finally,the organic components were refined in the last column. The theoretical stage numbers of the two columns were chosen as the operation variable. 7 groups of experimental conditions were determined by the uniform design principle,and the model was calculated by using the software of process simulation. Then the relationship of operating variables and the cost of the investment,operation cost and total project cost was studied through polynomial stepwise regression analysis,which was optimized with genetic algorithm by using 1st Opt software data processing system. The results show that the model parameters of the minimum value of the total project: the theoretical stage number of light-off column X1= 6,the theoretical stage number of products column X2= 10. According to the optimization results,the hydraulic calculations of evaporator and distillation columns were carried out. A commercial plant was designed and it achieved the design separation requirements in the actual operation process: the content of the water in product was 0. 08%( mass fraction) and the yield of product reached 93. 3%. The two data were both higher than the design value.更多还原