考试科目: 化工原理 总 6 页 第 6 页 ⒌ 解:①已知:D=1kmol,列全塔的物料衡算: F?D?WFxF?DxD?Wxw ? F?1?W0.6F?0.9?0.02W ? W?0.517kmolF?1.517kmol ②泡点进料:xe=xF=0.6,ye?xD?yeye?xe1.50.375?xe1????1?xe0.9?0.81820.8182?0.6?3?0.61?2?0.6?0.8182 Rmin?RRmin???0.375 ?4③全凝器,泡点回流:y1=xD=0.9 x1?y1?????1?y1?0.93?2?0.9?0.75 精馏段的操作线方程: y??RR?1x?1R?1xD?1.52.5x?12.5?0.9?0.6x?0.36 y2?0.6x1?0.36?0.81?x2?0.587 x2<xF,故第二层板为进料板,精馏段只有一层理论塔板。 ④提馏段的操作线方程: L'?L?qF?RD?F?1.5?1?1.517?3.017kmol y'?L'L'?Wx'?WL'?WxW?3.0173.017?0.517x'?0.5173.017?0.517?0.02?1.2068x'?0.004136 若进料板上的溶液组成仍为0.6,则上升的气相组成为: y'?1.2068?0.6?0.004136?0.720 6