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时间:2020-07-31
《化工-精馏塔数据处理.doc》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、一、部分回流(1)原始数据室温(进料温度):19℃大气压:101.13kpa原料折光率:1.3728回流比R=4.0折光率温度/℃塔顶1.362877.8塔釜1.3775------附录1:常压下乙醇-正丙醇气液平衡数据X摩尔分数00.1260.1880.2100.3580.4610.5460.6000.6630.8841.000Y摩尔分数00.2400.3180.3490.5500.6500.7110.7600.7990.9141.000附录2:35℃时折光率与液体浓度关系液相组成折光指数液相组成折光指数液相组成折光指数01.37900.39771.36920.79831.360
2、00.050521.37750.49701.36700.84421.35900.099851.37620.59901.36500.90641.35730.19741.37400.64451.36340.95091.35530.29501.37190.71011.36201.0001.3551直线拟和方程为:y=-0.0233x+1.3787(2)数据处理折光指数质量分数摩尔分数XA原液1.37280.25320.3030塔顶1.36280.68240.7370塔釜1.37750.05050.0649即:XD=0.7370XW=0.0649XF=0.3030精馏操作线方程为:R=4直
3、线过塔顶点(0.7370,0.7370)故精馏段操作方程为:q线方程为:直线经过进料点(0.303,0.303)查资料可算得:原液泡点温度Tb=93.85℃进料温度tF=19℃原液比热容Cp=158.7kj/(kmol.k)汽化热r=44610kj/(kmol.k)故q线方程为:q线与精馏段操作线交点M(0.3249,0.40732)提馏段直线为塔釜点(0.0649,0.0649)与点M的连线各条直线如下图:由上图采用图解法可知理论塔板数6.5块,扣掉塔釜一级即为塔效率中的理论塔板数NT=6.5-1=5.5块实际塔板数NP=7块故总板效率E0=NT/NP=78.57%二、全回流(1
4、)原始数据室温(进料温度):19℃大气压:101.13kpa原料折光率:1.3728折光率温度/℃塔顶1.360577.3塔釜1.3778(2)数据处理折光指数质量分数摩尔分数XA原液1.37280.25320.3030塔顶1.36050.78110.8231塔釜1.37780.03860.0498即:XD=0.8231XW=0.0498XF=0.3030全回流时精馏段和提馏段重合为对角线,如下图由图可知台阶数为6.5,扣掉塔釜一级即为塔效率理论塔板数NT=6.5-1=5.5块实际塔板数NP=7块故总板效率E0=NT/NP=78.57%
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