管壳式换热器课程设计

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1、化工原理课程设计说明书目录前言················································2第一部分，甲苯冷凝器的设计一、设计任务···········································4二、设计要求··········································4三、工艺结构尺寸·······································6（1）管径和管内流速·······························634化工原理课程

2、设计说明书（1）管程数和传热管数·····························6（2）平均传热温差校正及壳程数·····················6（3）传热管的排列和分程数法·······················7（4）壳体内径·····································7一、换热器主要传热参数核算·····························8（1）计算管程对流传热系数··························8（2）34化工原理课程设计说明书计算壳程对流传热系

3、数··························8（3）确定污垢热阻··································9（4）总传热系数····································9第二部分，甲苯冷却器的设计一、试算并初选换热器规格·······························11（1）流体流动途径的确定···························11（2）确定流体的定性温度、物性数据，并选择列管换热34化工原理课程设计说明书器的型式················

4、·····················11一、计算总传热系数····································11（1）计算热负荷···································11（2）冷却水用量···································12（3）计算平均传热温度差···························12（4）总传热系数K·································1234化工原理课程设计说明书（1）估算换热面积·······

5、··························12一、工艺结构尺寸·······································12（1）管径和管内流速································12（2）管程数和传热管数······························12（3）平均传热温差校正及壳程数······················13（4）传热管的排列和分程方法························1434化工原理课程设计说明书（1）壳体内径···········

6、···························14一、换热器主要传热参数核算·····························15(1)壳程对流传热系数·····························15(2)管程对流传热系数·····························16(3)基于管内表面积的总传热系数···················16(4)计算面积裕度·································17化工原理课程设计任务书34化工原理课程设计说明书一、设计任务题目＃＃．＃

7、万吨/年甲苯精馏塔冷凝冷却(水冷)换热系统工艺设计。二、任务给定条件1.热流条件：流量为10500kg/h的甲苯蒸汽从120℃，0.14MPa(绝压)冷凝到120℃，0.14MPa(绝压)甲苯液，再冷却到30℃；120℃甲苯汽相热焓140Kcal/Kg，液相焓53Kcal/Kg，30℃甲苯液相焓13Kcal/Kg；定性温度80℃时甲苯密度810Kg/m3,比热0.446(Kcal/Kg.℃)绝对粘度0.32(cp)，比热0.104(Kcal/(m.h.℃))。2.冷流条件新鲜水初始温度25℃，循环水初始温度45℃，换热后水温升15℃。水的物性

8、数据由化原上册附录查取。3.管壳式换热器类型提示设计压力1.6MPa，要求管程和壳程的压降不大于30kPa，冷凝采用浮头式，冷却采用固定管板式管壳式换热器。三、设计