【作者】 钟禄平；

【导师】 刘家祺；

【作者基本信息】 天津大学 ， 化学工艺， 2004， 硕士

【摘要】 用萃取精馏分离甲醇和丙酮混合物。该工艺是中科院山西煤化所费托合成工艺水相副产物分离流程的组成部分。随着我国煤液化制合成油工艺技术的开发和工业化，从水相副产物分离各含氧有机产品是亟待解决的课题。该课题对过程的经济性和环境保护都具有十分重要的意义。本论文根据甲醇和丙酮形成共沸物的特点，采用萃取精馏进行分离，并应用模糊数学方法选择萃取精馏溶剂。然后应用ASPEN PULS软件进行模拟，为实验塔的建立和实验参数的确定提供指导；通过改变设备和操作参数所做的实验，得出各塔的适宜设备和操作参数；最后将实验数据和模拟数据进行比较，对模型的可靠性进行了考核。本工作得出了适宜的设备和操作参数分别为：﹙1﹚ 萃取精馏塔：塔板数20，溶剂进料位置第6块塔板（自上而下数），原料进料位置第13块塔板，溶剂比为3，回流比为6，采出率约为0.166kg/kg。﹙2﹚ 溶剂回收塔：塔板数14，原料进料位置第10块塔板（自上而下数），回流比为3，采出率约为0.217kg/kg。对于这两个塔，实验数据与用UNIQUAC热力学模型的模拟结果基本吻合，从而说明模型的可靠性。利用该模型对工艺进行了全流程模拟与优化，模拟结果可用于工艺设计和指导生产。更多还原

【Abstract】 A relatively complex azeotrope of methanol-acetone with boiling temperature very close to that of the more volatile compound in the system(acetone) was studied using the extractive distillation in this dissertation. It is an important part of the separation process, which gains the varieties of the organic materials from the by-product in water of Fischer-Tropsch synthesis of the Shanxi academe in liquefying coal. With the exploitation of technology in liquefying coal to synthesize oil, the separation of the by-product in water is a problem solved urgently, which is significant to the environment and the economy of the liquefying coal process.Due to the methanol-acetone binary system shaping the azeotrope, the extractive distillation was adopted to separate them. Firstly the solvent water was selected from many solvents by the fuzzy mathematics. Secondly, through the simulation of the ASPEN PLUS software, the results were used to direct to set up and operate the distillation columns. Thirdly the optimal parameters were obtained by adjusting all parameters of each column in a lot of experiments. At last, the reliability of the model was proved by means of comparing the results of experiments and those of the simulations.Through the experiments and simulations of the extractive distillation column and the solvent recovery column, the optimal parameters gained are as follows. (1) The extractive distillation column: the column is 20 theory stages and the solvent and the feed stage are respectively 6 and 13(from up to down); the ratio of solvent to feed is 3, the reflux ratio 6 and the distillate ratio(D/F) 0.166kg/kg. (2) The solvent recovery column: the equipment parameters: the column is 14 theory stages and the feed stage is 10(from up to down); the operating parameters: the reflux ratio is 3 and the distillate ratio(D/F) is 0.217kg/kg.UNIQUAC thermodynamics model is considered as the optimal model in the <WP=5>simulation of two columns(the extractive distillation column and the solvent recovery column) by model check. The separation process was simulated and optimized using the model, whose results can be used in designing and directing production.更多还原