分壁式精馏塔节能及实验研究

发布时间：2018-06-08 23:50

本文选题：分壁式精馏塔 + 节能　；参考：《华东理工大学》2015年硕士论文

【摘要】：分壁式精馏塔作为特殊的热耦精馏塔,即在精馏塔内放置一竖直隔板,可实现多组分混合物的高纯度分离,相较于常规序列精馏塔不仅减少了设备的投资和占地面积,更重要的是可以大幅度降低精馏过程中的能耗。本文为了获得分壁式精馏塔的适用范围,采用Matlab数学编程软件对其节能效果进行模拟研究。然后自行设计分壁式精馏塔中试实验装置并对其进行实验研究。首先,分别建立分壁式精馏塔和常规序列精馏塔的数学模型。采用Matlab数学编程软件对分壁式精馏塔和常规序列精馏塔进行模拟计算,确定各塔段的理论塔板数目。根据模拟结果,分别从进料组成、分离指数和相对挥发度两个方面,对分壁式精馏塔相较于常规序列塔的节能效果进行研究,寻找它的适用范围。研究表明分壁式精馏塔适用于分离进料中间组分大于0.5,分离指数接近于1且αBC接近2的物系。然后,自行设计了分壁式精馏塔的中试装置,并用其进行中试实验研究。分别以甲醇-乙醇-正丙醇、乙醇-正丙醇-正丁醇两组三元物系,通过正交试验和单因素条件实验,讨论了进料组成、回流比、液体分配比等操作条件对分壁式精馏塔分离效果的影响。实验结果表明,当进料组成的摩尔比为1：3：1,回流比为8,液体分配比为3：7,气体分配比为1：1时,两组物系的分离效果均较优。最后,基于实验结果,采用Matlab数学编程软件对分壁式精馏塔分离醇类三元物系的实验结果进行拟合计算,使得实验值与模拟值的平均偏差在允许范围之内。通过模拟分析分壁式精馏塔的节能效果以及中试实验的研究,模拟结果和实验结果为分壁式精馏塔的工业应用提供了基础。
[Abstract]:As a special thermocouple distillation tower, a vertical partition is placed in the distillation tower, which can achieve high purity separation of multi component mixtures. Compared with the conventional sequence distillation tower, the investment and area of the equipment are reduced, and the energy consumption in the distillation process is greatly reduced. The application range of the distillation column is applied to the simulation of the energy saving effect of the Matlab programming software. Then the pilot plant of the fractional distillation column is designed by ourselves and the experimental research is carried out. First, the mathematical model of the fractional distillation column and the conventional distillation column is set up respectively. The fractional distillation of the fractional distillation is adopted by the Matlab programming software. The tower and the conventional sequence distillation column are simulated to determine the number of theoretical plates in each column. According to the simulation results, the energy saving effect of the partial wall distillation column compared with the conventional sequence tower is studied from two aspects of the composition, the separation index and the relative volatility, and the application range of the fractionating column is found. It is used to separate the middle component of the material more than 0.5, the separation index is close to 1 and the alpha BC is close to 2. Then, the pilot plant of the fractionating tower is designed by itself, and the pilot experiment is carried out in the pilot experiment. The two groups of three elements, methanol - ethanol - propanol, ethanol - propanol - n-butanol, are respectively tested by orthogonal test and single factor experiment, The effect of feed composition, reflux ratio and liquid distribution ratio on separation effect of fractional distillation column is discussed. Experimental results show that when the molar ratio is 1:3:1, the reflux ratio is 8, the liquid distribution ratio is 3:7, and the gas distribution ratio is 1:1, the separation effect of the two groups is better. Finally, based on the experimental results, the M is used. Atlab mathematical programming software is used to fit and calculate the experimental results of the separation of the three elements of the alcohol class by the fractional wall distillation column, which makes the average deviation between the experimental value and the simulated value within the allowable range. The simulation analysis of the energy saving effect and the pilot experiment of the wall fractionating tower is carried out. The simulation results and the experimental results are the work of the wall fractionating tower. The application of the industry provides a basis.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ053.5

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