1.毕业设计说明书 2.零号图纸1.5张 设计进度计划： 第1~5周——查阅资料、现场调研、确定设计方案、工艺计算、确定工艺尺寸；
要求：
第6~13周——结构设计、强度计算、绘图； 主要参考资料：
[1]毛希谰. 换热器设计[M]. 上海：上海科学技术出版社，1998 [2]姚玉英. 化工原理[M].天津：天津大学出版社，1999 [3]夏青德. 化工设备设计[M].北京：化学工业出版社，2000 [4]GB150-1998，钢制压力容器[S].中国标准出版社出版.2000
指导教师 接受论文任务开始执行日期 2014 年 3 月17 日 学生签名
第14~15周——撰写论文、打印论文、准备答辩。
[5]GB151-1999，管壳式换热器[S].中国标准出版社.1998.
摘要 摘要
换热器是许多工业部门广泛应用的工艺设备。设计中考虑操作条件及介质的特性，本设计采用U型管式换热器结构。该设备适用于温差不大，壳程流体清洁，不易结垢拆卸、清洗的场合。在设计过程中，依照GB151-1999《钢制U型管式换热器》对换热器依次进行工艺计算、结构设计（材料选型）、强度计算，最后完成专题讨论。其中在强度计算中，根据温差具体的数值，对膨胀节的需要进行计算。本设计每层管子排列方式采用正三角形排列，这种方法在相同的管板面积上可排较多的管子，且管外表面传热系数大。但由于是双管程结构，所以在分程隔板两边采用矩形排列。最后经检测该台换热器是否满足介质换热的需要。
关键词：换热器；U型管式；工艺设计；结构设计；强度计算
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广东石油化工学院专科毕业设计：U型管换热器设计
ABSTRACT
The heat exchanger is the techniques equipment widely used in many industrial departments. In the design it uses the fixed tube plate type of the heat interchanger structure,because of the operating condition and the medium characteristic. This equipment is suitable when the temperature difference is not big,the shell regulation fluid is clean,or the fraze,disassembling or cleaning for the heat exchanger is not easy. In the process of the design,the technological design,the structural design(material shaping) and the strength calculation must according to the GB151-1999\it completes the seminar. In the strength calculation,it must be computed for the require of the part of inflates according to the difference concrete value ot the temperature.In the design the way of each pipe arrangement uses the equilateral triangle arrangement,this method may arrange many pipes in the same tube plate area,also the tube outside surface heat transfer coefficient is big. But because the structure is two barrel regulation, it uses the rectangular arrangement at the both sides of the partition board. Finally it be difined that the heat interchanger whether satisfies the need of the medium heat transfer.
Key words: heat exchanger；fixed tube plate；technological design; structural design； strength calculation
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目录 目 录
摘要 ..................................................................................................................... I ABSTRACT......................................................................................................... II 前 言 .................................................................................................................. 1 第一章 绪论 ..................................................................................................... 2
1．1 换热器的应用及其发展 ..................................................................... 2 1．2 换热器的分类及其特点 ..................................................................... 5 1．3 U型管式换热器的设计 ...................................................................... 7 第二章 换热器的工艺计算 ................................................................................ 8
2．1 设计条件 ............................................................................................ 8 2．2 确定物性数据 .................................................................................... 8 2．3 符号说明 ............................................................................................ 8 2．4 流体走向的确定 ................................................................................ 9 2．5估算传热面积，初选换热器的规格 ................................................... 9 2．6换热管的排列和管心距 .....................................................................10 2．7 折流板............................................................................................... 11 2. 8接管 ..................................................................................................... 11 2．9 压强降的核算 ...................................................................................12 2．10 总传热系数的核算 ..........................................................................13 第三章 换热器的结构设计 ...............................................................................16
3. 1筒体 .....................................................................................................16 3. 2管箱材料 .............................................................................................16 3. 3 管箱法兰 ............................................................................................17 3. 4接管材料 .............................................................................................18 3. 5 接管法兰 ............................................................................................19 3. 7 管板 ....................................................................................................20 3. 8材料 .....................................................................................................21 3. 9 换热管 ................................................................................................21 3. 10 拉杆 ..................................................................................................22 3.11 折流板的选取及布置 .........................................................................23 3. 12 封头 ..................................................................................................23 第四章 换热器的强度计算 ...............................................................................25
4．1 筒体壁厚计算 ...................................................................................25 4．2管箱短节、封头厚度计算 .................................................................26 4．3 膨胀节的设计 ...................................................................................26 4．4换热器受压元件强度计算及校核 ......................................................28 4.5 换热器强度计算与校核 .......................................................................28
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