【正文】 寧夏理工學(xué)院畢業(yè)設(shè)計(jì)I摘 要本設(shè)計(jì)主要針對分離中的精餾工段進(jìn)行工藝設(shè)計(jì)，分離二甲醚、甲醇和水三元體系。查閱相關(guān)資料充分了解二甲醚的性質(zhì)、用途及其現(xiàn)有的分離工藝。結(jié)合實(shí)際情況提出分離工藝。通過基礎(chǔ)數(shù)據(jù)的查找、處理得到相應(yīng)條件下的基礎(chǔ)數(shù)據(jù)。精餾塔采用浮閥塔，本設(shè)計(jì)較為突出的特點(diǎn)有以下幾點(diǎn)：（1）塔頂采用液氨冷凝，用來準(zhǔn)確控制回流比。 （2）塔板結(jié)構(gòu)設(shè)計(jì)中精餾段采用單溢流，提餾段則采用雙溢流。塔底采用水蒸汽加熱，以提供足夠的熱量。再通過計(jì)算得出理論板數(shù)為 塊，塔效率為 ，實(shí)際板數(shù)為 27 塊，進(jìn)料位置為提餾段向上第十六塊，在浮閥塔主要工藝尺寸的設(shè)計(jì)計(jì)算中得出精餾段塔徑為 ，提餾段塔徑為 。有效塔高 。通過浮閥的流體力學(xué)驗(yàn)算，用 AutoCAD 繪制負(fù)荷性能圖證明各指標(biāo)數(shù)據(jù)均符合標(biāo)準(zhǔn)。以保證精餾過程的順利進(jìn)行并使效率盡可能的提高。關(guān)鍵詞：二甲醚；甲醇；水；三元體系；分離寧夏理工學(xué)院畢業(yè)設(shè)計(jì)IIAbstractThe design conducts process programming to separate ternary system of dimethyl, methanol and water mainly based on distillation processes in separation. understanding the nature, application and existing separation process of dimethyl through searching relevant information. proposing separation process with actual situation. Basic data of corresponding conditions was obtained by searching and handling basic data. the float valve tower was considered as the primary device of distillation operation, there are several points for the innovation characteristic of the design: (1) liquid ammonia condensate in the top of the tower, it Was used to control reflux ratio accurately. (2) the rectifying section utilizes single overflow and the stripping section utilizes double overflow in design of trays structure.Water vapor provide enough heat in tower bottom. Theoretical plate number of , tower efficiency of , The actual number of trays of 27, Feed location locates in sixteenth trays above the stripping section by calculation, Column diameter of the rectifying section of meters, column diameter of the stripping section of meters and effective tower height of meters in the main process size design calculations of float valve tower. each index data are in line with standards In order to ensure the smooth progress of the rectification process and improve efficiency as much as possible by checking hydrodynamics of float valve tower which drawed load performance with Auto CAD.Keywords: DME 。 Methanol 。 Water 。 Ternary system 。 Separation寧夏理工學(xué)院畢業(yè)設(shè)計(jì)III畢業(yè)論文（設(shè)計(jì)）原創(chuàng)性聲明本人所呈交的畢業(yè)論文（設(shè)計(jì)）是我在導(dǎo)師的指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。據(jù)我所知，除文中已經(jīng)注明引用的內(nèi)容外，本論文（設(shè)計(jì)）不包含其他個人已 經(jīng)發(fā)表或撰寫過的研究成果。對本論文（設(shè)計(jì)）的研究做出重要貢獻(xiàn)的個人和集體，均已在文中作了明確說明并表示謝意。 作者簽名： 日期： 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頁以上的雙面打印4）圖表應(yīng)繪制于無格子的頁面上5）軟件工程類課題應(yīng)有程序清單，并提供電子文檔1）設(shè)計(jì)（論文）2）附件：按照任務(wù)書、開題報(bào)告、外文譯文、譯文原文（復(fù)印件）次序裝訂3）其它寧夏理工學(xué)院畢業(yè)設(shè)計(jì)V目錄摘 要 ..............................................................................................................................................I關(guān)鍵詞 ..............................................................................................................................................IAbstract ...........................................................................................................................................II1 緒論 ....................................................................................................................................... 1 概述 ................................................................................................................................... 1 設(shè)計(jì)依據(jù) ..................................................................................................................... 1 設(shè)計(jì)規(guī)模及設(shè)計(jì)要求 ................................................................................................. 1 產(chǎn)品規(guī)格、性質(zhì)及用途 ............................................................................................. 1 技術(shù)來源 ..................................................................................................................... 3 技術(shù)選用 ........................................................................................................................... 8 合成氣一步法二甲醚分離工藝 ................................................................................. 8 2 精餾塔的工藝計(jì)算 ............................................................................................................... 9 精餾塔的物料衡算 ........................................................................................................... 9 基礎(chǔ)數(shù)據(jù) ..................................................................................................................... 9 物料衡算（清晰分割） ............................................................................................. 9 精餾塔工藝計(jì)算 ............................................................................................................. 10 操作條件的確定 ....................................................................................................... 10 精餾塔設(shè)備計(jì)算 ............................................................................................................. 13 基礎(chǔ)數(shù)據(jù) ................................................................................................................... 13 塔板數(shù)的確定 ........................................................................................................... 17 精餾塔主要尺寸計(jì)算 ............................................................................................... 20 塔板結(jié)構(gòu)設(shè)計(jì) ........................................................................................................... 23 塔板流體力學(xué)驗(yàn)算 .................................................................................................. 31 塔