【正文】 目錄 一、總論 .......................................................................................................................... 4 概述 .................................................................................................................... 4 文獻(xiàn)綜述 ............................................................................................................. 4 板式塔類型 ................................................................................................ 4 篩板塔 ....................................................................................................... 4 設(shè)計(jì)任務(wù)書(shū) .......................................................................................................... 5 設(shè)計(jì)題目 .................................................................................................... 5 設(shè)計(jì)條件 .................................................................................................... 5 設(shè)計(jì)任務(wù) .................................................................................................... 5 二、設(shè)計(jì)思路 ................................................................................................................... 5 三、工藝計(jì)算 ................................................................................................................... 6 平均相對(duì)揮發(fā)度的計(jì)算 ....................................................................................... 6 繪制 txy 圖及 xy 圖 ........................................................................................... 7 全塔物料衡算 ..................................................................................................... 8 進(jìn)料液及塔頂、塔底產(chǎn)品的摩爾分?jǐn)?shù) .......................................................... 8 平均摩爾質(zhì)量 ............................................................................................ 9 全塔物料衡算： ......................................................................................... 9 進(jìn)料量： ................................................................................................................... 9 最小回流比的計(jì)算和適宜回流比的確定 ................................................................ 9 最小回 流比 ................................................................................................ 9 確定最適操作回流比 R ............................................................................ 10 圖解法求理論板數(shù)及加料板位置 ....................................................................... 11 精餾段和提餾段操作線方程的確定 ........................................................... 11 理論板數(shù)及加料板位置 ............................................................................ 12 實(shí)際板數(shù)及加料板位置確定 .............................................................................. 13 四、塔板結(jié)構(gòu)設(shè)計(jì) .......................................................................................................... 13 氣液體積流量 .................................................................................................... 13 精餾段的氣液體積流量 ............................................................................ 13 提餾段的氣液體積流量 ............................................................................ 15 塔徑計(jì)算 .......................................................................................................... 16 塔徑初步估算 .......................................................................................... 16 校核 HT 與 D 的范圍 ................................................................................ 18 塔高的計(jì)算 ....................................................................................................... 18 塔板結(jié)構(gòu)設(shè)計(jì) ................................................................................................... 19 塔板結(jié)構(gòu)尺寸的確定 ................................................................................ 19 弓形降液管 ............................................................................................. 20 塔盤(pán)布置 ................................................................................................. 21 開(kāi)孔面積計(jì)算 ........................................................................................... 21 篩板的篩孔和開(kāi)孔率 ................................................................................ 22 塔板流體力學(xué)校核 ............................................................................................. 22 塔板阻力 ................................................................................................. 22 液面落差 .................................................................................................. 24 3 液沫夾帶量校核 ...................................................................................... 25 嚴(yán)重漏液校核 ........................................................................................... 25 降液管溢流液泛校核 ................................................................................ 25 塔板性能負(fù)荷圖 ................................................................................................ 26 漏液線 ..................................................................................................... 27 液沫夾帶線 ............................................................................................. 27 液相負(fù)荷下限線 ....................................................................................... 27 ..4液相負(fù)荷上限線 ...................................................................................... 28 液泛線 ..................................................................................................... 28 五、換熱器 .................................................................................................................... 29 換熱器的初步選型 ............................................................................................ 29 塔頂冷凝器 .............................................................................................. 29 塔底再沸器 ........................................................................