《化工原理》(下册,2007,12,化工)A卷答案一、填空题(20分;每小题2分)1.大于;2.减少;3.减少;4.<,<,>;5.1ny=0.794;6.减小,增加;7.筛孔塔板、泡罩塔板、浮阀塔板、舌形塔板、网孔塔板、垂直塔板、多降液管塔板、林德筛板、无溢流塔板等中的四种;8.大于干燥介质中水汽(或其它蒸汽)的分压;9.0.3绝干料水kgkg/;10.小于。二、选择题(20分;每小题2分)1.A;2.C.;3.B.;4.D;5.B;6.A;7.B;8.A;9.A;10.C。三、计算题(60分;每小题20分)1.解:精馏段操作线方程y=4.5x/5.5+0.7/5.5=0.818x+0.127提馏段操作线方程泡点进料,精馏段操作线方程与提馏段操作线方程交点为35.0Fqxx,yq=0.818×0.35+0.127=0.413提馏段操作线方程由WqWqWWxxxyxxxy解得y=1.25x-0.025塔顶采用全凝器,y1=xD=0.7x1=0.7/(2.5-1.5×0.7)=0.483y2=0.818×0.483+0.127=0.522x2=0.522/(2.5-1.5×0.522)=0.30435.0Fqxx过进料点y3=1.25×0.304-0.025=0.355x3=0.355/(2.5-1.5×0.355)=0.180y4=1.25×0.180-0.025=0.2x4=0.2/(2.5-1.5×0.2)=0.090.14tN。2.解:①泡点进料1q;50.0Fqxx;75.0)1(1qqqxxy;8.0minqqqDxyyxR②6.12minRR;hkmolDRVV/130)1(/;③hkmolDFW/5005.0/)(WDxFxxDFWhkmolFRDqFLL/180/0139.0385.1///xWLWxxWLLyW3.解:(1)对于理想干燥(1.01+1.88H1)t1+2492H1=(1.01+1.88H2)t2+2492H2H2=0.0292kg水.kg1skg)11)(1(221111L=W/(H2-H1)=0.0816/(0.0292-0.006)=3.52kg.s1∴Q=L(1.01+1.88H1)(t1-t0)=3.52(1.01+1.88×0.006)(140-20)=431.4kW(2)设出口温度为t2',出口湿度为H2'(1.01+1.88H1)t1+2492H1=(1.01+1.88×H2')t2'+2492H2'H2'=0.044kg水.kg1绝干空气P=PH2'/(0.622+H2')=101×0.044/(0.622+0.044)=6.6726kN/m2td=3991/(16.5-ln6.6726)-234=39.4℃旋风分离器后,空气温度为45-10=35℃因td>35℃,故物料将反潮。