3.1 物料衡算 ......................................................................................6 3.2 摩尔衡算 ....................................................................................7 4．塔体主要工艺尺寸 ..............................................................................7 4.1 塔板数的确定 ..............................................................................7
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4.2.3 液相表面张力计算 ............................................................14 4.2.4 塔径计算 ............................................................................14 4.3 塔截面积 .....................................................................................15 4.4 精馏塔有效高度计算 ................................................................15 4.5 精馏塔热量衡算 ........................................................................16 4.5.1 塔顶冷凝器的热量衡算 ....................................................16 4.5.2 全塔的热量衡算 ................................................................18 5．板主要工艺尺寸计算 ........................................................................21 5.1 溢流装置计算 ............................................................................21 5.1.1 堰长 lw .................................................................................21 5.1.2 溢流堰高度 hW ....................................................................21 5.1.3 弓形降液管宽度 Wd 和截面积 Af.....................................22 5.1.4 降液管底隙高度 h0 ............................................................22 5.2 塔板布置 ....................................................................................22 5.2.1 塔板的选用 ........................................................................22 5.2.2 边缘宽度和破沫区宽度的确定 ........................................23 5.2.3 鼓泡区面积的计算 ............................................................23 5.2.4 浮阀的数目与排列 ...............................23 5.3 阀孔的流体力学验算 ...........................................................25 5.3.1 塔板压降 ............................................................................25 5.3.2 液泛 ....................................................................................26 5.3.3 液沫夹带 ............................................................................27 5.3.4 漏液 ....................................................................................29 6．设计筛板的主要结果汇总表 ............................................................30
化学与环境工程学院
《化工原理》课程设计
设计题目：年产量 1.5 万吨乙醇-正丙醇精馏塔设计 专业班级： 指导教师： 学生姓名： 学 号： 起止日期 2011.06.13-2011.06.24
目录 1．设计任务............................................................................................... 2 2．设计方案............................................................................................... 3
4.1.1 塔板压力设计 ......................................................................7 4.1.2 塔板温度计算 ......................................................................8 4.1.3 物料相对挥发度计算 ..........................................................9 4.1.4 回流比计算 ..........................................................................9 4.1.5 塔板物料衡算 ....................................................................10 4.1.6 实际塔板数的计算 ............................................................11 4.1.7 实际塔板数计算 ................................................................12 4.2 塔径计算 ....................................................................................12 4.2.1 平均摩尔质量计算 ............................................................12 4.2.2 平均密度计算 ....................................................................13