蒸發(fā)器設(shè)計(jì) 2

1、2.6.2重復(fù)上述計(jì)算步驟（1）由所求得的各效蒸發(fā)量、，求各效料液的濃度，它們分別為1W2W%011Fx37083.330.1215.71FW37083.338761.17x?????%2012Fx37083.330.1223.51FWW37083.338761.179391.22x??????=50%3x—原料液的濃度；0xF—原料液的進(jìn)料量，kgh；（2）計(jì)算各效料液的沸點(diǎn)表26效數(shù)123濃度%15.7123.5150常壓下的沸點(diǎn)升

2、高℃a?0.210.371.8密度kgm31061.981096.151230因末效完成液濃度和冷凝器壓力均不變，各種溫度差損失及溶液沸點(diǎn)可視為恒定，即℃，故末效溶液的沸點(diǎn)33331.4410.53112.97???????????仍為79.47℃而℃則第三效加熱蒸汽的溫度（即第二效二次蒸3t3t40.29??汽溫度）為℃323340.2979.47119.76TTtt???????則℃??22223119.7627316.216.20

3、.370.422205.8610Tar?????????232gh197.22101096.159.812.22209048.552mppPa?????????查表知=121.11℃mT℃11121.11119.761.35mTT??????℃21??℃121T143.692.11=145.71t????‘℃2T?122221.16119.762.77143.69Ttt?????????（f）第Ⅲ效：])([33221033333rtt

4、CWCWFCrrDWpwpwp????????????2122205.8637083.333.95W4.187W4.187122.5379.470.982333.7W??????????????（）10.6893918.97W??hkg（g）又因==28183.33kghW1W2W3W（h）聯(lián)立式（e）至（h），可得=8791.661Whkg=9406.462Whkg=9976.423Whkg=9157.981Dhkg（4）計(jì)算蒸發(fā)器的

5、傳熱面積31119157.982091.110Q=Dr=5319514.44W3600???則第一效蒸發(fā)器傳熱面積為21111Q5319514.44S=129.71Kt300013.67m????32118791.662138.1210Q=Wr=5221562.24W3600???則第二效蒸發(fā)器傳熱面積為22222Q5221562.24S=129.88Kt190021.16m????33229406.462205.8610Q=Wr=57