作业乙醇水精馏塔（课程设计）浮阀塔.doc
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目录
设计任务书·············································· 4
第一章 前言············································ 5
第二章 精馏塔过程的确定······························ 5
第三章 精馏塔设计物料计算···························· 5
3.1水和乙醇有关物性数据································ 6
3.2 塔的物料衡算········································ 6
3.2.1料液及塔顶、塔底产品及含乙醇摩尔分率………………… 7
3.2.2平均分子量········································ 8
3.2.3物料衡算·········································· 8
3.3塔板数的确定·········································· 8
3.3.1理论塔板数的求取······························ 8
3.3.2求理论塔板数·································· 9
3.4塔的工艺条件及物性数据计算··························· 11
3.4.1操作压强······································ 12
3.4.2温度··········································· 12
3.4.3平均分子量··································· 12
3.4.4平均密度······································ 13
3.4.5液体表面张力 ································ 13
3.4.6液体粘度···································· 14
3.4.7精馏段气液负荷计算······························· 14
第四章 精馏塔设计工艺计算····························· 15
4.1塔径············································· 15
4.2精馏塔的有效高度计算······························ 16
4.3溢流装置·········································· 16
4.3.1堰长······································· 16
4.3.2出口堰高·································· 16
4.3.3降液管的宽度与降液管的面积············ 16
4.3.4降液管底隙高度···························· 17
4.4塔板布置及浮阀数目排列··························· 17
4.5塔板流体力学校核································· 18
4.5.1气相通过浮塔板的压力降······················· 18
4.5.2淹塔········································· 18
4.6雾沫夹带········································· 18
4.7塔板负荷性能图··································· 16
4.7.1雾沫夹带线··································· 17
4.7.2液泛线·················
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