板式精馏塔进料口最佳位置的确定及理论塔板数的求解

(,,210042),;;;TQ028.13TheDiscussionofDeterminationabouttheBestEntranceofRawMaterialsandtheNumberofTheoreticalPlatesinRectifyingTower/WangZhonglin(NanjingNormalUniversity,Nanjing210042,P.R.China)//JournalofNortheastForestryUniversity.-2004,32(2).-9193Rectificationisonekindofimportantunit-operationofindustry,whichhasbeenusedinwide-rangingofindus2try,suchasoilindustry,chemicalengineering,lightindustry,pharmacy,industryofatom,bioengineeringandengi2neeringofenvironmentalprotection.Rectificationisakindofunit-operationthatneedshighcost.Thenumberoftheo2reticalplatesandentranceofrawmaterialscanaffectthecostofinvestmentandoperationaswellasthequalityofproduc2tiongreatly.Thedeterminationaboutthebestentranceofrawmaterialsandthenumberoftheoreticalplatesinrectifyingsectionandstrippingsectionwithfivekindsofheat-statesisdiscussed.KeywordsTheoreticalplate;Rectifyingsection;Strippingsection;Vapour-liquidphaseequilibrium,,,,,,,,,(),,,1,1.1,,,y1=xD,:,,19484,,:200419:,y1x1;,,x1y2;,,1.2,y1=xD,,(),,2,,();,(),,,;,,,,,,,,,,322Vol.32No.220043JOURNALOFNORTHEASTFORESTRYUNIVERSITYMar.2004,(),y1=xD,xNxFN(),,(N-1),yNxN-1,,(),,(q)(),(),qxy,(),(,)();(),(),,xN=xF(xNxF)N,N,,xq=xF,,xNxF(),N,,,,xF,yF,ZF,yFZFxF,xNxF,yNyFxNZFyNZF,,,,,,y1=xD,:xq=x1,yNxD,N;yq=y1,xMxw,MNM:30%(,)-96%,4%,4,q=0.45,,2.46:yn=xn1+(-1)xn=2.46xn1+1.46xn,xn=yn-(-1)yn=yn2.46-1.46ynyn+1=RR+1xn+XDR+1=44+1xn+0.964+1,yn+1=0.8000xn+0.1920ym+1=LL-Wxm-WL-WxW=L+qFL+qF-Wxm-WL+qF-WxW=RD+qF(R+1)D-(1-q)Fxm-F-D(R+1)D-(1-q)FxW=R+qFD(R+1)-(1-q)FDxm-FD-1(R+1)-(1-q)FDxW=4+0.453.5385(4+1)-(1-0.45)3.5385xm-3.5385-1(4+1)-(1-0.45)3.53850.04:F/D=xD-xWZF-xW=0.96-0.040.30-0.04=3.5385ym+1=1.8313xm-0.0333q:y=qq-1x-ZFq-1=0.450.45-1x-0.30.45-1=-0.8182x+0.5455xq=0.2184(xF0.2000)yq=0.3667(yF0.3800),:()x1=xq=0.21841()y1=x11+(-1)x1=2.460.21841+1.460.2184=0.40742x2=y1-0.19200.8000=0.26922y2=2.460.26921+1.460.2692=0.4754x3=0.3542,y3=0.5743;2932x4=0.4779,y4=0.6925;x5=0.6256,y5=0.8043;x6=0.7654,y6=0.8892;x7=0.8711,y7=0.9435;x8=0.9393,y8=0.97440.96(xD)y8xD,8N=7+0.96-0.94350.9744-0.9435=7.53:(,):()y1=yq=0.36671()x1=y1-(-1)y1=0.36672.46-1.460.3667=0.19062y2=1.8313x1-0.0333=1.83130.1906-0.0333=0.31572x2=0.31572.46-1.460.3157=0.1579:y3=0.2560,x3=0.1227;y4=0.1914,x4=0.0878;y5=0.1275,x5=0.0561;y6=0.0694,x6=0.02940.04(xW)x6xW,6M=5+0.0561-0.040.0561-0.0294=5.603,,,,,,:L=L+qF;V=V+(1-q)F,,,,1,,,..:,19992,..:,1995392: