【正文】 ...................................................................................................12 實際板層數(shù)的確定 (以逐板計算法為依據(jù) ) ....................................................................................13 2．精餾塔操作條件計算 ............................................................................................................................14 操作壓強的選擇 ................................................................................................................................14 操作溫度的計算 ................................................................................................................................14 塔內(nèi)物料平均分子量、張力、流量及密度的計算 ......................................................................15 密度及流量 ................................................................................................................................15 液相表面張力的確定： ............................................................................................................16 液體平均粘度計算 ....................................................................................................................17 3． 塔徑的確定 ...........................................................................................................................................18 ................................................................................................................................................21 ....................................................................................................................................................21 ...........................................................................................................................22 溢流裝置 .............................................................................................................................................22 堰長 lw ........................................................................................................................................23 出口堰高 hw ................................................................................................................................23 弓形降液管寬度 Wd 和面積 Af ...............................................................................................25 降液管底隙高度 0h ...................................................................................................................26 塔板布置及篩孔數(shù)目與排列 ...........................................................................................................27 塔板的分塊 .................................................................................................................................27 邊緣區(qū)寬度確定 .........................................................................................................................27 開孔區(qū)面積 aA 計算 篩孔計算及其排列 ...............................................................................27 ........................................................................................................................................29 塔板壓降 .............................................................................................................................................29 干板阻力 ch 計算 .......................................................................................................................29 液體表面張力的阻力計算 σh 計算 ..........................................................................................30 氣體通過每層塔板的液柱高 ph ..............................................................................................31 液面落差 ............................................................................................................................................32 液沫夾帶 .............................................................................................................................................32 漏液 .....................................................................................................................................................33 液泛 .....................................................................................................................................................34 ........................................................................................................................................35 漏液線 .................................................................................................................................................35 李健 化工 070325 甲醇 水二元篩板精餾塔設計 5 液沫夾帶線 .........................................................................................................................................36 液相負荷下限線 ................................................................................................................................37 液相負荷上限線 ................................................................................................................................37 液泛線 .................................................................................................................................................38 操作彈性 .............................................................................................................................................39 9. 輔助設備及零件設計 .............................................................................................................................40 塔頂冷凝器（固定管板式換熱器） ...............................................................................................40 估計換熱面積 .............................................................................................................................40 計 算流體阻力 .............................................................................................................................42 殼程流體阻力 .............................................................................................................................43 計算傳熱系數(shù) ...........................................