【正文】 年產(chǎn) 15 萬噸甲醇三塔精餾工藝設(shè)計 The Process Design of Threetowerdistillation on 15kt/a Methanol 目錄 摘要 .................................................................................................................................................................................... I Abstract ........................................................................................................................................................................... II 主要符號說明 .......................................................................................................................................................... III 第一章 甲醇生產(chǎn)及其精餾工藝的選擇 .............................................................................................1 甲醇的性質(zhì)及用途 .......................................................................................................... 1 甲醇的性質(zhì) ................................................................................................................... 1 甲醇的 用途 ................................................................................................................... 2 甲醇發(fā)展及前景 ............................................................................................................ 3 甲醇精餾工藝的比較與選擇 .......................................................................................... 4 甲醇精餾的重要性 ....................................................................................................... 4 甲醇精餾 工藝概述 ....................................................................................................... 4 甲醇工藝流程的選擇 ................................................................................................... 5 第二章 工藝計算 ................................................................................................................................................ 7 物料衡算 ........................................................................................................................ 7 設(shè)計任務(wù)與摩爾衡算 ................................................................................................... 7 預塔物料衡算 ............................................................................................................... 8 加壓塔的物料衡算 ....................................................................................................... 8 常壓塔的物料衡算 ....................................................................................................... 8 熱量衡算 .......................................................................................................................... 9 塔頂冷凝器的熱量衡算 ............................................................................................... 9 全塔的熱量衡算 ......................................................................................................... 11 塔釜冷凝再沸器的熱量衡算 ..................................................................................... 13 第三章 常壓精餾塔設(shè)計 ................................................................................................................................ 14 塔板數(shù)的確定 ................................................................................................................ 14 平均相對揮發(fā)度α的計算 ......................................................................................... 14 理論塔板層數(shù)的求取 .................................................................................................... 15 全塔效率和實際塔板層數(shù)的求取 ................................................................................ 16 精餾段和提餾段的數(shù)據(jù)的計算 ............................................................................18 精餾塔的塔體工藝尺寸 ................................................................................................ 21 塔徑的計算 ................................................................................................................. 21 精餾塔有效高度的計算 ............................................................................................. 23 塔板主要工藝尺寸的計算 ............................................................................................ 24 塔板布置 ........................................................................................................................ 26 浮閥個數(shù) n 及排列 ......................................................................................................... 26 浮閥塔板流體力學的驗算 ............................................................................................ 28 精餾段流體力學的驗算 ............................................................................................. 28 提餾段流體力學的驗算 ............................................................................................. 30 塔板負荷性能圖 .......................................................................................................... 32 精餾段負荷性能圖 ................................................................................................... 32 提餾段負荷性能圖 ................................................................................................... 34 塔體壁厚計算 .............................................................................................................. 36 接管設(shè)計 ...................................................................................................................... 37 塔頂蒸氣出口管的直徑 DV .................................................................................... 37 回流管的直徑 DR ..................................................................................................... 37 進料管的直徑 DF...................................................................................................... 38 塔底出料管的直徑 Dw ............................................................................................ 38 再沸器返塔連接管直徑 DV .................................................................................... 39 常壓塔工藝計算匯總 .......................................................................