【正文】 7 最小回流比的求取 ...................................................................................................28 最小理論塔板數(shù)的求取 ............................................................................................28 高沸塔熱量衡算 .......................................................................................................30 4 高沸塔設計的基礎數(shù)據(jù) ..............................................................................................................33 操作溫度 ...........................................................................................................................33 操作壓力 ...........................................................................................................................33 氣液相組成 .......................................................................................................................33 密度的計算 .......................................................................................................................33 液體密度 ρL 的求取 ..................................................................................................33 氣相密度 ρg 的求取 ..................................................................................................35 表面張力的計算 ................................................................................................................35 精餾段表面張力計算 ................................................................................................35 提餾段表面張力計算 ................................................................................................36 粘度的計算 .......................................................................................................................36 精餾段粘度的計算 ...................................................................................................36 提餾段粘度的計算 ...................................................................................................37 流量計算 ...........................................................................................................................38 理論塔板數(shù)的計算 ...................................................................................................39 進料位置的確定 .......................................................................................................39 5 設備工藝尺寸的計算 .................................................................................................................40 塔徑的計算 .......................................................................................................................40 塔高的計算 .......................................................................................................................41 板式塔形式的選取 .............................................................................................................42 溢流裝置 ...........................................................................................................................44 塔板布置及浮閥數(shù)目與排列 ...............................................................................................45 6 塔板流體力學驗算 .....................................................................................................................48 氣相通過浮閥塔的壓強降 ..................................................................................................48 液泛 ..................................................................................................................................50 霧沫夾帶核算 ....................................................................................................................51 塔板負荷性能圖 ................................................................................................................52 7 塔其它附屬設備的選擇 ..............................................................................................................57 塔頂冷凝器的選擇 .............................................................................................................57 再沸器 ..............................................................................................................................58 筒體壁厚的計算 ................................................................................................................58 橢圓封頭 ...........................................................................................................................59 裙座 ..................................................................................................................................60 選擇材料 .................................................................................................................60 確定結構 .................................................................................................................60 法蘭連接 ...........................................................................................................................61 塔節(jié) ..................................................................................................................................61 水的用量 ...........................................................................................................................61 儀表的選型和流程中的主要控制點 ....................................................................................61 8 改進和建議 ...............................................................................................................................62 流程改進 ...........................................................................................................................62 建議 ..................................................................................................................................62 工程項目建設 ..........................................................................................................62 工藝流程設計 .........................................................................................................62 聚氯乙烯工業(yè)發(fā)展的改進措施和建議 .....................................