乙醇预热器的设计.doc

化工原理课程设计说明书
题目:乙醇—水精馏塔预热器的设计
学院: 海洋学院
班级: 食品本
姓名: XXX X
学号: 11XXXXXXXX
指导老师: XX
时间:

目录
设计任务书··································································3
概述···································································4
二、确定设计方案····························································5
参数的计算·····························································5
换热器型号的选取·························································8
3、传热排列方法及壳体内径···················································9
折流挡板·································································9
接管·····································································9
三、总传热系数的核算·······················································10
管程核算··································································10
壳程核算·································································10
3、管壳程压力降核算··························································11
4、总传热系数核算对··························································13
四、设计结果一览表···························································15
设计者心得体会···························································16
六、主要参考文献····························································17
七、主要符号说明·····························································17


设计任务书
本课程设计任务是乙醇——水预热器的设计。是利用塔釜液对原料液进行加温。
设计数据及条件
生产能力:年处理乙醇—水混合液6000t(开工率300天/a,24h/d);
原料:乙醇含量为50%(质量)的常温25~35℃液体;
产品浓度/%(质量):94
%(质量);
%(质量)。
设备型式:列管式换热器;
允许压强降:管程压强降小于10kPa;壳程总压强降小于60kPa。
物料
流量 kg/h
组成(含乙醇量)
摩尔分数
温度℃
操作压力 MPa
进口
出口
釜液


105


原料液


30


设计计算内容
传热面积、换热管根数;
确定管束的排列方式、管程数、挡板、隔板的规格和数量;
壳体的数量;
冷、热流体进、出口管径;
核算总传热系数;
管壳程流体阻力校核。
设计成果
(1)设计说明书一份;阐明设计特点,列出主要技术数据,对有关工艺流程和设备选型做出技术上和经济上的论证和平价。应按设计程序列出计算公式和计算结果;对所得物性数据很实用的经验公式图表应注明来历。
(2)预热器的装配图一张(A1图纸)。
一、概述
换热器是化工、石油、食品及其他许多工业部门的通用设备,在生产中占有重要地位。由于生产规模、物料的性质、传热的要求等各不相同,故换热器的类型也是多种多样。
按用途它可分为加热器、冷却器、冷凝器、蒸发器和再沸器