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本科毕业设计说明书

筛板精馏塔设计

DESIGN OF SIEVE PLATE DISTILLATION COLUMN

学院（部）： 专业班级： 学生姓名： 指导教师：

2014 年 X 月 X 日

XXXXX大学毕业设计

筛板精馏塔设计

摘要

设计了年处理量为10万吨的分离苯和甲苯混合物的筛板精馏塔，由所给的任务，分离45%（苯的质量分数）苯-甲苯的混合物。本设计为了满足生产工艺的要求，我对精馏塔各个方面进行了准确的计算，包括塔的工艺条件，材料性能参数，塔体结构，塔体尺寸等。设计可以分为工艺设计和结构设计两部分。工艺设计首先是确定工艺方案和工艺流程，然后对塔进行物料衡算，并用图解法计算理论塔板数，最后根据全塔效率计算实际塔板数。工艺设计还需计算塔的物性参数和塔体工艺尺寸。由以上工艺条件，可以初步设计出筛板的工艺尺寸，并对塔板进行负荷性能校核。结构设计包括塔体壁厚计算，封头的设计，裙座的设计以及塔体的强度校核。本设计还对塔的主要附件进行了选型及主要接管的尺寸进行了计算。本设计设计合理，满足生产工艺要求。

关键词：苯-甲苯，精馏，筛板塔，工艺设计，结构设计

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XXXXX大学毕业设计

DESIGN OF SIEVE PLATE DISTILLATION COLUMN

ABSTRACT

Designed here is an distillation sieve plate column which has an annual handling capacity of 10 tons to separates benzene and toluene mixture.Given by the task, it separates 45% benzene from the mixture of the toluene.In order to satisfy the demend of the production, I did an accurate calculation for every aspects of the column as followings: the process condition, the properties of the material, the column, the specification of the tower plate, etc. The design can be divided into two parts, that is the process design and mechanical design. First, I determined the process, then calculated the mass balance of the column, as well as the theoretical plate number using graphic method.Finally I calculated the real plate number according to the efficiency of the whole column. Process design requires calculation of physical parameters and the geometries of the column. Given the above conditions, we can preliminarily caculate the process size of sieve, and check the load performance of the tray. Mechanical design includes the calculation of the thickness of column wall, the design of the head and skirt , and the strength check of column.I also made a selection of attachments of the column and calaculated the size of main nozzles. The column is proper designed and meets the demand of the production.

KEYWORDS: Benzene-Toluene, Distillation, Sieve Plate Tower, Process Design，Mechanical Design.

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