《篩板式精餾塔設(shè)計(jì)》PPT課件

《《篩板式精餾塔設(shè)計(jì)》PPT課件》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫(kù)。

1、篩板式精餾塔設(shè)計(jì)設(shè)計(jì)任務(wù)：題號(hào)[36]www.themegallery.comCompanyLogo設(shè)計(jì)內(nèi)容第一部分精餾計(jì)算第二部分塔板流動(dòng)工況及結(jié)構(gòu)計(jì)算（下塔）第三部分容器及強(qiáng)度計(jì)算第四部分附圖及參考文獻(xiàn)www.themegallery.comCompanyLogo精餾計(jì)算下塔精餾采用中間抽污氮進(jìn)入上塔參加精餾，另外一部分壓縮空氣進(jìn)膨脹機(jī)節(jié)流提供冷量進(jìn)入上塔。其簡(jiǎn)單流程示意圖見(jiàn)右圖：www.themegallery.comCompanyLogo精餾計(jì)算精餾計(jì)算流程設(shè)計(jì)：下塔精餾計(jì)算液空、污液氮、純液氮節(jié)

2、流氣化率的確定液空節(jié)流后氣液相組分的計(jì)算膨脹空氣過(guò)熱引起氣化量的計(jì)算上塔精餾計(jì)算實(shí)際塔板數(shù)的確定www.themegallery.comCompanyLogo下塔精餾計(jì)算全塔物料守恒下塔物料守恒www.themegallery.comCompanyLogoDiagram下塔第I段操作線方程：下塔第II段操作線方程：www.themegallery.comCompanyLogo下塔精餾計(jì)算：www.themegallery.comCompanyLogo液空、污液氮、純液氮節(jié)流氣化率的確定1、液空節(jié)流氣化率的

3、計(jì)算（）已知液空的過(guò)冷度為5攝氏度，從下塔0.58Mpa節(jié)流到0.136Mpa，根據(jù)空氣T-S圖可查得。2、污氮及純氮?dú)饣实挠?jì)算（）由于污氮中氧和氬含量較低，將污氮近似處理成純的氮來(lái)計(jì)算，所以查氮的T-S圖可得到：www.themegallery.comCompanyLogo液空節(jié)流后氣液相組分的計(jì)算節(jié)流前液空量：節(jié)流后氣化量：節(jié)流后液體量：www.themegallery.comCompanyLogo膨脹空氣過(guò)熱引起氣化量的計(jì)算膨脹空氣量過(guò)熱度查得過(guò)熱焓氣化潛熱因此膨脹空氣過(guò)熱引起氣化量www.the

4、megallery.comCompanyLogo上塔的精餾計(jì)算A段www.themegallery.comCompanyLogo上塔的精餾計(jì)算B段根據(jù)上塔第1段物料守恒可得操作線方程：www.themegallery.comCompanyLogo上塔的精餾計(jì)算C段組分塔板數(shù)（%）（%）（%）（%）030.0943.1328161.54.443.8774.734274.25.2857.3205.665381.85.6865.3645.936www.themegallery.comCompanyLogo上塔的

5、精餾計(jì)算D段www.themegallery.comCompanyLogo實(shí)際塔板數(shù)的確定段理論塔板數(shù)塔板效率實(shí)際塔板數(shù)總計(jì)上塔A70.51460B120.524C30.339D90.713下塔II110.552030I70.7510www.themegallery.comCompanyLogo塔板流動(dòng)工況及結(jié)構(gòu)計(jì)算（下塔）塔徑的計(jì)算溢流斗結(jié)構(gòu)設(shè)計(jì)計(jì)算塔板阻力計(jì)算溢流斗尺寸及塔板間距計(jì)算www.themegallery.comCompanyLogo塔徑的計(jì)算下塔工作溫度的確定工作溫度下液體、氣體密度的確定

6、實(shí)際工況下氣、液體積的確定www.themegallery.comCompanyLogo塔徑的計(jì)算塔徑的計(jì)算取塔徑2000mm,選雙溢流型塔板溢流強(qiáng)度：www.themegallery.comCompanyLogo溢流斗結(jié)構(gòu)設(shè)計(jì)計(jì)算氣體校核計(jì)算篩孔速度的計(jì)算選擇溢流板高度和動(dòng)液封取溢流擋板高度：流量系數(shù)：m=10000動(dòng)液封：www.themegallery.comCompanyLogo塔板阻力計(jì)算干板阻力計(jì)算：液柱靜阻力：膜層阻力：總塔間總阻力：www.themegallery.comCompanyLo

7、go溢流斗尺寸及塔板間距計(jì)算初始液封的選?。篴=7mm臨界深度的計(jì)算避免發(fā)生液冷的最小塔板間距避免發(fā)生霧沫夾帶的間距的計(jì)算查塔板間距標(biāo)注系列取H=120mmwww.themegallery.comCompanyLogo容器及強(qiáng)度計(jì)算塔體壁厚計(jì)算封頭的設(shè)計(jì)計(jì)算塔體開(kāi)孔及開(kāi)孔補(bǔ)強(qiáng)支座設(shè)計(jì)支撐梁工字鋼的選取www.themegallery.comCompanyLogo塔體壁厚計(jì)算最高操作壓力的計(jì)算選材及許用應(yīng)力[]的計(jì)算鎂鋁合金LF2焊接形式及焊縫系數(shù)的選取容器壁厚附加量的選取計(jì)算筒體壁厚的計(jì)算壁厚校核www.

8、themegallery.comCompanyLogo封頭的設(shè)計(jì)計(jì)算封頭形式的選取橢圓形封頭封頭厚度的計(jì)算取標(biāo)準(zhǔn)值22mm，且有www.themegallery.comCompanyLogo塔體開(kāi)孔及開(kāi)孔補(bǔ)強(qiáng)人孔選擇與計(jì)算標(biāo)準(zhǔn)選取空氣進(jìn)料口接管計(jì)算液空出料口接管計(jì)算密度與公式求的直徑污液氮出料口接管計(jì)算純液氮出料口接管計(jì)算www.themegallery.comCompanyLogo支座設(shè)計(jì)塔內(nèi)液體重量計(jì)算塔內(nèi)氣體重量計(jì)算塔殼