一般 蒸馏与闪蒸的分别.pptVIP

Principies of Chemical Engineering____ Distillation * Principies of Chemical Engineering____ Distillation * 9.3 简单蒸馏与平衡蒸馏 一、简单蒸馏 简单蒸馏也称微分蒸馏，间歇非稳态操作(unsteady batch operation)，在蒸馏过程中系统的温度和汽液相组成均随时间改变。 y 原料液 x 蒸气 xD1 xD2 xD3 冷凝器 1、定义 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * Principies of Chemical Engineering____ Distillation * 9.3 简单蒸馏与平衡蒸馏 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * Principies of Chemical Engineering____ Distillation * 2、 特点 ① 间歇操作过程是一动态过程； ② 易挥发组分更多地传递到气相中去，釜液温度不断升高； ③ 产品与釜液组成随时间而改变(降低）； ④ 瞬时蒸气与釜中液体处于平衡状态。 9.3 简单蒸馏与平衡蒸馏 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * Principies of Chemical Engineering____ Distillation * 二、平衡蒸馏 定义 闪蒸罐 塔顶产品 yA xA 加热器 原料液 塔底产品 Q 减压阀 9.3 简单蒸馏与平衡蒸馏 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * Principies of Chemical Engineering____ Distillation * 9.3 简单蒸馏与平衡蒸馏 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * Principies of Chemical Engineering____ Distillation * (2) 特点 ①　连续操作； ②　组成和温度恒定不变； ③　气、液两相平衡 。 温度和压力对平衡蒸馏的影响 9.3 简单蒸馏与平衡蒸馏 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.