【正文】 uipment in the Petroleum chemical industry production. The shellandtube heat exchanger is widely applied in the industrial production due to its simple structure, reliability and the operation flexibility. Compared with the traditional distillation process, this novel process could reduce the heat consumption and softwater consumption. However, this novel process enhances the coupling of different units in the system and the interactions between distillation columns, which results in the plexity of system responses and control. Therefore, it is necessary to study the behavior of this methanol distillation process of four columns before putting it into implementation of industrial application. Keywords： methanol distillation, simulation of , heat exchanger, design and typeselection II 吉林工業(yè)職業(yè)技術學院畢業(yè)設計 目 錄 摘 要 ............................................................. I 前 言 ......................................................... 1 第一 章 文獻綜述 ............................................... 3 .................................................. 3 ............................................ 3 .............................................. 4 甲醇的簡介 ............................................... 4 甲醇精餾流程發(fā)展 ......................................... 5 工藝流程概述 ......................................... 5 典型的工藝流程 ....................................... 6 影響精餾操作的因素與調節(jié) ............................. 9 第二章 甲醇精餾工段物料衡算 ................................... 12 甲醇精餾原理 ............................................ 12 預精餾塔的作用 ...................................... 12 加堿對甲醇精餾的改善 ................................ 13 萃取精餾在甲醇精餾中的應用 .......................... 13 加壓塔的節(jié)能效應 .................................... 14 回流比的選擇 ........................................ 14 四塔精餾工段工藝的物料衡算 .............................. 14 甲醇精餾工段物料衡算任務 ............................ 14 甲醇精餾工段物料衡算計算原理 [18] ...................... 15 甲醇精餾工段物料衡算 ................................ 16 第三章 常壓塔冷卻器的設計 ..................................... 25 I 吉林工業(yè)職業(yè)技 術學院畢業(yè)設計 ............................................. 25 [18] ........................................... 25 ....................................... 26 工藝結構尺寸 ........................................ 27 ............................................... 28 ................................................. 29 ............................................... 29 確定折流擋板形狀和尺寸 .................................. 34 波形膨脹節(jié) .............................................. 35 設備主要附件的選擇 [17] ................................... 36 接管及法蘭的選型 ................................... 36 左管板的選型 ....................................... 38 換熱管的選擇 ....................................... 39 左管箱短節(jié)的選擇 .................................... 40 左管箱封頭的選擇 ................................... 40 左管箱隔板的選擇 ................................... 40 左管箱法蘭和密封 墊片的選型 ......................... 41 右管板 ............................................. 41 右管箱設計 ........................................ 41 鞍座的選型 ........................................ 42 設計結果一覽表 ......................................... 42 第 五 章 結論 ................................................... 44 參 考 文獻 ...................................................... 45 致 謝 ........................................................ 47 II 吉林工業(yè)職業(yè) 技術學院畢業(yè)設計 前 言 甲醇是重要的有機基本產(chǎn)品，用途非常廣泛。換熱器是化工生產(chǎn)中重要的通用熱工設備之一，管殼式換熱器以其結構簡單、牢固、操作彈性大等特點被廣泛應用于工業(yè)生產(chǎn)