化工原理课程设计换热器设计资料

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1、化工原理课程设计设计任务：换热器班级：13级化学工程与工艺（3）班姓名：魏苗苗学号：132010309020目录化工原理课程设计任务书················································2设计概述···································································3试算并初选换热器规格···················································61.流体流动途径的确定·····························

2、····················62.物性参数及其选型····················································63.计算热负荷及冷却水流量············································74.计算两流体的平均温度差20············································75.初选换热器的规格····················································7工艺计算·····················

3、············································101.核算总传热系数·····················································102.核算压强降··························································13设计结果一览表·························································16经验公式···········································

4、······················16设备及工艺流程图·······················································1720设计评述·································································17参考文献·································································18化工原理课程设计任务书一、设计题目：设计一台换热器二、操作条件：1、苯：入口温度80℃，出口温度40℃。2、冷却介

5、质：循环水，入口温度32.5℃。3、允许压强降：不大于50kPa。4、每年按300天计，每天24小时连续运行。三、设备型式：管壳式换热器四、处理能力：109000吨/年苯五、设计要求：1、选定管壳式换热器的种类和工艺流程。202、管壳式换热器的工艺计算和主要的工艺尺寸的设计。3、设计结果概要或设计结果一览表。出口温度40.5℃壳体内部空间利用率70%选定管程流速u（m/s）1壳程流体进出口接管流体流速u1（m/s）1管程流体进出口接管流体流速u2（m/s）1.54、设备简图。（要求按比例画出主要结构及尺寸）5、对本设计的评述及有关问题的讨论。六、附表：1.设计概述1.1热量

6、传递的概念与意义1.1.1热量传递的概念热量传递是指由于温度差引起的能量转移，简称传热。由热力学第二定律可知，在自然界中凡是有温差存在时，热就必然从高温处传递到低温处，因此传热是自然界和工程技术领域中极普遍的一种传递现象。1.1.2化学工业与热传递的关系化学工业与传热的关系密切。这是因为化工生产中的很多过程和单元操作，多需要进行加热和冷却，例如：化学反应通常要在一定的温度进行，为了达到并保持一定温度，就需要向反应器输入或输出热量；20又如在蒸发、蒸馏、干燥等单元操作中，都要向这些设备输入或输出热量。此外，化工设备的保温，生产过程中热能的合理利用以及废热的回收利用等都涉及到传

7、热的问题，由此可见；传热过程普遍的存在于化工生产中，且具有极其重要的作用。总之，无论是在能源，宇航，化工，动力，冶金，机械，建筑等工业部门，还是在农业，环境等部门中都涉及到许多有关传热的问题。应予指出，热力学和传热学既有区别又有联系。热力学不研究引起传热的机理和传热的快慢，它仅研究物质的平衡状态，确定系统由一个平衡状态变成另一个平衡状态所需的总能量；而传热学研究能量的传递速率，因此可以认为传热学是热力学的扩展。1.1.3传热的基本方式根据载热介质的不同，热传递有三种基本方式：1.1.3.1热传导（又称导热）物体各部