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年產(chǎn)20萬噸甲醇合成二甲醚的工藝設(shè)計畢業(yè)論文-展示頁

2025-07-13 12:25本頁面
  

【正文】 ....................................................... 11 物理性質(zhì) ..................................................................................................................... 12 DME的毒性 ................................................................................................................ 12 第 2章 工藝流程介紹 .....................................................................................13 生產(chǎn)方法簡述 ................................................................................................................. 13 甲醇脫水制二甲醚 ..................................................................................................... 13 合成氣直接合成二甲醚 ............................................................................................. 14 工藝流程說明 ................................................................................................................ 15 原料甲醇 ..................................................................................................................... 16 反應(yīng) ............................................................................................................................. 16 合成氣冷卻 ................................................................................................................. 16 二甲醚精餾 ................................................................................................................. 16 甲醇塔和二甲醚精餾塔 ............................................................................................. 17 生產(chǎn)工藝特點 ................................................................................................................. 17 主要工藝指標 ................................................................................................................. 18 二甲醚產(chǎn)品指標 ......................................................................................................... 18 催化劑的使用 ............................................................................................................. 18 第 3章 塔設(shè)備計算及選型 ............................................................................19 汽化塔及其附屬設(shè)備的計算選型 ................................................................................ 19 物料衡算 ..................................................................................................................... 19 熱量衡算 ..................................................................................................................... 21 理論板數(shù)、塔徑 、填料選擇及填料層高度的計算 ................................................. 25 汽化塔附屬設(shè)備的選型計算 ..................................................................................... 31 合成塔物料衡算 ............................................................................................................ 32 精餾塔及其附屬設(shè)備的計 算選型 ................................................................................ 32 物料衡算 ..................................................................................................................... 33 熱量衡算 ..................................................................................................................... 34 附屬設(shè)備的選型計算 ................................................................................................. 36 理論塔板數(shù)的計算 ..................................................................................................... 37 精餾塔主要尺寸的設(shè)計計算 ..................................................................................... 37 塔徑設(shè)計計算 ............................................................................................................. 39 填料層高度的計算 ..................................................................................................... 41 填料塔液體分布裝置 ................................................................................................. 42 填料塔壁厚的計算 ...................................................................................................... 42 結(jié) 論 .............................................................................................................44 致 謝 ................................................................................ 錯誤 !未定義書簽。 參考文獻 ..........................................................................................................45 附 錄 .............................................................................................................47I 年產(chǎn) 20 萬噸甲醇合成二甲醚的工藝設(shè)計 摘要: 作為 LPG 和石油類的替代燃料,目前二甲醚 (DME)倍受注目。與甲烷一樣,被期望成為 21 世紀的能源之一。甲醇脫水制二甲醚分為液相法和氣相法兩種工藝,本設(shè)計采用氣相法制備二甲醚工藝。氣相法的工藝過程主要由甲醇加熱、蒸發(fā)、甲醇脫水、二甲醚冷凝及精餾等組成 。填料塔的塔徑為 米。 關(guān)鍵詞: 二甲醚 甲醇 工藝設(shè)計 精餾 II The process design of 20xx00t/a dimethyl ether prepared by methanol Abstract: As LPG and oil alternative fuel, DME has drawn attentions at present. Physical properties of DME is similar for LPG, and don’t produce bustion gas to damage the environment, so, It can be produced largely. Like methane, DME is expected to bee 21st century energy resources. DME is prepared by methanol dehydration, namely, synthetic methanol first and then methanol dehydration to dimethyl ether by methanol dehydration. Methanol dehydration to DME is divided into two kinds of liquid phase and gasphase process. This design uses a process gas of dimethyl ether prepared by dimethyl. Heating methanol to evaporation, methanol vapor through the γA12O3 catalyst bed, vapor methanol dehydration to dimethyl ether by. This process is made of methanol process heating, evaporation, dehydration of methanol, dimethyl ether condensation and distillation etc. Dimethyl ether is obtained by design calculation of rectification tower packing layer is meters high,always rectifying packing layer height is meters,the stripping section of packing layer height is 4 packed tower diameter is by the distillation of dimethyl ether content reached %,achieved the desired goal. Key words: dimethyl ether。 p
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