【正文】 設計任務書 1 設計題目：分離苯 — 甲苯混合液的浮閥板式精餾塔工藝設計 2 設計參數 (1) 設計規(guī)模：苯 —— 甲苯混合液處理量 2 萬 t/a (2) 生產制度：年開工 330 天，每天小時連續(xù)生產 (3) 原料組成：苯含量為 35%（質量百分率，下同） (4) 進料狀況：含苯 35%的苯 —— 甲苯混合溶液 20℃ (5) 分離要求：塔頂苯含量不低于 %，塔底 甲 苯含 量不小 于98% (6) 建廠地區(qū)：大氣壓為 760mmHg，自來水年平均溫度為 20℃的鹽城 市 3 設計要求和工作量 （ 1） 完成設計說明書一份 （ 2） 完成精餾塔工藝條件圖一張 4 設計說明書主要內容 II 目錄 摘 要 ................................................................................................................................ 1 緒 論 ................................................................................................................................ 2 設計方案的選擇和論證 .................................................................................................... 3 1 設計流程 .................................................................................................................... 3 2 設計思路 .................................................................................................................... 3 第一章 塔板的工藝設計 .................................................................................................. 4 ................................................................................................................. 4 ................................................................................................... 4 平衡線方程的確定 ........................................................................................... 4 求精餾塔的氣液相負荷 .................................................................................... 6 操作線方程 ..................................................................................................... 6 用逐板法算理論板數 ....................................................................................... 6 實際板數的求取 .............................................................................................. 7 進料溫度 的計算 .............................................................................................. 7 操作壓強 ........................................................................................................ 8 ..................................................................................... 8 ................................................................................................ 9 .................................................................................10 精餾塔工藝尺寸的計算 ..........................................................................................10 ..................................................................................................10 .................................................................................12 ........................................................................................12 ...............................................................................................12 、浮閥排列及塔板布置 .............................................................................13 ..................................................................................................15 fh ...........................................................15 dH ...............................................................................15 Ve .......................................................................................16 ...........................................................................................17 ...........................................................................................17 .........................................................................................................18 液相負荷上限線 ..........................................................................................19 （漏液線） ..........................................................................20 ...........................................................................................20 .......................................................................................................................21 第二章 熱量衡算 ............................................................................................................ 21 塔底熱量 .....................................................................................................23 III ................................................................................................................24 第三章 輔助設備 ............................................................................................................ 26 .........................................................................................................26 ...........................................................................................27 ....................................................................................27 .........................................................................................................28 第四章 塔附件設計 ........................................................................................................ 29 .......................................................................................................................29 .........................................................................................................29 .........................................................................................................29 ..................................................................................................29 ...........................................................................................29 ..................................................................................................30 .............................................................................................................30 .............................................................................................................30 ..................