【正文】 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(yù)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(xué)的驗算 ............................................................................................ 28 精餾段流體力學(xué)的驗算 ............................................................................................. 28 提餾段流體力學(xué)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 .................................................................................................. 39 結(jié) 論 ............................................................................................................................................................................ 41 致 謝 ...................................................................................................................................... 錯誤 !未定義書簽。正因為其在工業(yè)生產(chǎn)中的重要地位，往往對其純度有較高 要求，但合成反應(yīng)條件如溫度、壓力、催化劑等的作用使合成反應(yīng)偏離主反應(yīng)方向生成各種副產(chǎn)物，成為甲醇中的雜質(zhì)，所以為了獲得高純度的甲醇，需進行精餾除質(zhì)。 關(guān)鍵詞 ： 甲醇 三塔精餾 常壓塔 工業(yè)設(shè)計 II The Process Design of Threetowerdistillation on 150kt/a Methanol Abstract： Methanol as an important anic chemical raw materials and fuel quality, wide range of uses, mainly used in the field of fine chemicals, plastics, and agriculture. Because of its important role in the industrial production, the higher the purity is often required, but the effect of reaction conditions such as temperature, pressure, catalyst of the synthesis reaction deviates from the main direction of the reaction byproducts generated various bee methanol impurities, so in order to obtain a high purity methanol, except for the quality required for distillation. Through this design, single, double, three towers designed to pare three processes, the final selection of advanced, efficient, and low power consumption technology and use F1 Three Pagodas heavy float valve tower distillation system for the master device. By material balance, e to meet production needs 166,400 tons of crude methanol containing 92% annually。 Process design。 △ P — 壓力降， Pa。