利用反胶束技术萃取大豆蛋白的同时可以提取出大豆毛油,但毛油中含有有机溶剂,它们可以循环回收利用.在工业生产中,为了获得回收有机溶剂所用脱溶操作的相关工艺参数,该文基于 Aspen Plus 11.1软件模拟了反胶束萃取大豆蛋白过程中毛油的脱溶操作.利用 Aspen Plus 模块化分析功能,对油脂和溶剂的纯度、精馏塔的塔板数、再沸器和冷凝器的热负荷进行了分析,结果显示：减压蒸馏的回流比为0.352,塔顶馏出物流量为10.348 kg/h 时,油脂和溶剂的纯度分别可以达到98.9%和99.7%,此时再沸器和冷凝器的实际热负荷分别为1398.824W 和−1626.226 W.灵敏度分析模块显示：随着塔板数的增加,油脂和溶剂的浓度分别增大,并确定了最佳塔板数为5.在模拟计算的基础上,进行成本分析,每年可节约成本127.2万元,并初步探讨了工业化装置设计的技术关键点,以期为工业设计放大脱溶装置提供可靠的数据.%Compared with other traditional methods, the disadvantages of high production costs and pollution prevention were overcome in the soy-protein extraction process by reverse micelles. Soybean crude oil, containing organic solvent, can be extracted together with soybean protein by reverse micelles. It is necessary to control the purity of the organic solvent that is recycled, as well as the purity of the soybean crude oil in the circulating production process. The Aspen Plus 11.1 software is used for simulating the desolventizing of crude oil in the soy-protein extraction process by reverse micelles, which is aimed at recycling the organic solvent. This work aims to study continuous and circulating spirit distillation by computational simulation, presenting some strategies of process control to regulate the purity of the solvent and the soybean oil. With the modular analysis function of Aspen Plus, the purity of the oil and solvent, the stage number of distillation column, and the heat load of the reboiler and the condenser were analyzed. A generalized model (based on the NRTL model) for estimation of activity coefficients is applied to the simulation of the extraction process. The equilibrium stage model based on the RADFRAC module of Aspen Plus is employed for the steady-state simulation of the improved process flowsheet, and therefore rigorous simulations allow the appropriate operating conditions to be established in the separating process. It is shown in the results that the reflux ratio of the vacuum distillation was 0.352, the distillate flow was 10.348 kg/h, and the purity of the oil and solvent can be 98.9% and 99.7% respectively, while the actual heat loads of the reboiler and the condenser were 1398.824 W and -1626.226 W, respectively. According to the sensitivity analysis, the concentration of oil and solvent grew respectively with the number of stages, and the optimal number of stages was seven. The cost was analyzed based on simulation calculations, in which the annual cost savings was￥1 272 000. As an alternative to control the purity of solvent and soybean oil, the spirit distillation unit was highly efficient in the case of low contamination and production costs. Moreover, the reflux ratio and product flow rate have an important influence on the purity of spirit composition. The key parameters were provided for unit operations separating organic solvent from soybean oil. The technical key points for the industrialized installation design were discussed to provide reliable data for enlarged desolventizing devices in the industrial field.
展开▼
