分离乙醇-正丙醇混合液的浮阀精馏塔课程设计报告

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1、.成绩华北科技学院环境工程系《化工原理》课程设计报告设计题目分离乙醇-正丙醇混合液的浮阀精馏塔学生姓名学号指导老师专业班级教师评语化工原理课程设计任务书...1.设计题目：分离乙醇--正丙醇二元物系浮阀式精馏塔的设计2.原始数据及条件：进料：乙醇含量40%质量分数，下同），其余为正丙醇分离要求：塔顶乙醇含量90%；塔底乙醇含量0.01%生产能力：年处理乙醇-正丙醇混合液25000吨，年开工7200小时操作条件：间接蒸汽加热；塔顶压强1.03atm(绝压)；泡点进料；R=53.设计任务：1.完成该精馏塔的各工艺设计，包括设备设计及辅助设备

2、选型。2.画出带控制点的工艺流程图、塔板版面布置图、精馏塔设计条件图。3.写出该精馏塔的设计说明书，包括设计结果汇总和设计评价。概述本次设计针对二元物系的精馏问题进行分析、计算、核算、绘图，是较完整的精馏设计过程。精馏设计包括设计方案的选取，主要设备的工艺设计计算、辅助设备的选型、工艺流程图的制作、主要设备的工艺条件图等内容。通过对精馏塔的核算，以保证精馏过程的顺利进行并使效率尽可能的提高。本次设计结果为：理论板数为20块，塔效率为47.5%，精馏段实际板数为9块，提馏段实际板数为31块，实际板数40块。进料位置为第5块板，在板式塔主要

3、工艺尺寸的设计计算中得出塔径为1.6米，设置了四个人孔，塔高24米，通过浮阀板的流体力学验算，证明各指标数据均符合标准。关键词：二元精馏、浮阀精馏塔、物料衡算、流体力学验算。目录...一、绪论·························7二、塔板的工艺设计····················82.1精馏塔全塔物料衡算·················82.2乙醇和水的物性参数计算···············92.2.1温度·······················92.2.2密度·····················

4、··92.2.3混合液体表面张力················122.2.4混合物的粘度··················122.2.5相对挥发度···················132.2.6气液相体积流量计算···············132.3理论塔板数的计算··················142.4塔径的初步计算···················152.4.1精馏段·····················162.4.2提留段·····················162.5溢流装置·············

5、········172.5.1堰长·····················172.5.2方形降液管宽度和截面积···········172.5.3降液管底隙高度················182.6塔板分布、浮阀数目与排列·············182.6.1塔板分布···················18...2.6.2浮阀数目与排列·················18三、塔板的流体力学计算·················203.1气相通过浮阀塔板的压降···············203.1.1精馏段·········

6、············203.1.2提留段·····················213.2淹塔························213.2.1精馏段·····················213.2.2提留段·····················223.3物沫夹带······················223.3.1精馏段·····················223.3.2提留段·····················233.4塔板负荷性能图···················233.4.1物沫夹带

7、线···················233.4.2液泛线·····················243.4.3液相负荷上限··················263.4.4漏液线·····················263.4.5液相负荷下限··················26四、塔附件的设计·····················274.1接管························274.1.1进料管·····················274.1.2回流管·····················284

8、.1.3塔底出料管···················28...4.1.4塔顶蒸汽出料管·················284.1.5塔底进气管···················294.1.6法兰·