【正文】 影響，是其研究重點(diǎn)。 氣相甲醇脫水法制二甲醚 氣相甲醇脫水法是甲醇蒸氣通過分子篩催化劑催化脫水制得 DME。 液相甲醇脫水法制二甲醚 甲醇脫水制 DME 最早采用硫酸作催化劑，反應(yīng)在液相中進(jìn)行，因此叫做液相甲醇脫水法，也稱硫酸法工藝。（5）催化蒸餾法。 據(jù)市場調(diào)查國內(nèi)二甲醚需求量遠(yuǎn)遠(yuǎn)超過供給量，~ 萬噸/年，而高純度的二甲醚還依賴進(jìn)口。 與 H2S 反應(yīng)制備二甲基硫醚。由于它是一種優(yōu)良的清潔能源，已日益受到國內(nèi)外的廣泛重視。國內(nèi)外正在積極開發(fā)它在冰箱、空調(diào)、食品保鮮劑等方面的應(yīng)用，以替代氟里昂。陜西理工學(xué)院畢業(yè)設(shè)計(jì)年產(chǎn) 40 萬噸二甲醚工藝設(shè)計(jì)畢業(yè)論文目錄1 概 述 .................................................................................................................1 二甲醚的用途 .............................................................................................1 設(shè)計(jì)依據(jù) .....................................................................................................1 技術(shù)來源 .....................................................................................................1 液相甲醇脫水法制二甲醚 ..................................................................1 氣相甲醇脫水法制二甲醚 ..................................................................1 合成氣一步法生產(chǎn)二甲醚 ..................................................................2 二氧化碳加氫直接合成二甲醚 ..........................................................2 催化蒸餾法制二甲醚 ..........................................................................2 本設(shè)計(jì)采用的方法 ..............................................................................3 原料及產(chǎn)品規(guī)格 .........................................................................................3 設(shè)計(jì)規(guī)模和設(shè)計(jì)要求 .................................................................................32 技術(shù)分析 ...........................................................................................................4 反應(yīng)原理 .....................................................................................................4 反應(yīng)條件 .....................................................................................................4 反應(yīng)選擇性和轉(zhuǎn)化率 .................................................................................4 催化劑的選擇 .............................................................................................43 反應(yīng)器的結(jié)構(gòu)計(jì)算 ...........................................................................................5 物料衡算 .....................................................................................................5 計(jì)算催化劑床層體積 .................................................................................5 反應(yīng)器管數(shù) .................................................................................................5 熱量衡算 .....................................................................................................54 二甲醚精餾塔結(jié)構(gòu)計(jì)算 ...................................................................................8 甲醚精餾塔的物料衡算及理論板數(shù) .........................................................8 實(shí)際板層數(shù)的求取 .....................................................................................9 精餾塔的工藝條件及有關(guān)物性數(shù)據(jù)的計(jì)算 ...........................................10 操作壓力的計(jì)算 ................................................................................10 操作溫度計(jì)算 ....................................................................................10 平均摩爾質(zhì)量計(jì)算 ............................................................................11 平均密度計(jì)算 ....................................................................................11 液體平均表面張力的計(jì)算 ................................................................13 液體平均粘度 ....................................................................................13 精餾塔的塔體工藝尺寸計(jì)算 ...................................................................13 提餾段塔徑的計(jì)算 ............................................................................15 精餾塔有效高度的計(jì)算 ....................................................................16 塔板主要工藝尺寸的計(jì)算 .......................................................................16 溢流裝置計(jì)算 ....................................................................................16 塔板布置 ............................................................................................17陜西理工學(xué)院畢業(yè)設(shè)計(jì) 塔板的流體力學(xué)驗(yàn)算 ...............................................................................18 塔板壓降 ............................................................................................18 液面落差 ............................................................................................19 液沫夾帶 ............................................................................................19 漏液 ....................................................................................................19 液泛 ....................................................................................................19 塔板負(fù)荷性能圖 .......................................................................................19 漏液線 ................................................................................................19 液沫夾帶線 ........................................................................................20 液相負(fù)荷下限線 ................................................................................20 液相負(fù)荷上限線 ................................................................................21 液泛線 ................................................................................................21 精餾塔接管尺寸計(jì)算 ...............................................................................22 塔頂蒸氣出口管的直徑 ....................................................................22 回流管的直徑 ....................................................................................22 進(jìn)料管的直徑 ....................................................................................22 塔底出料管的直徑 ............................................................................235 甲醇精餾塔結(jié)構(gòu)計(jì)算 .....................................................................................24 設(shè)計(jì)方案的確定 .......................................................................................24 精餾塔的物料衡算 ...................................................................................24 原料液及塔頂和塔底的摩爾分率 ....................................................24 原料液及塔頂