丙烷蒸发器的设计+CAD图纸
毕业论文关键词：丙烷；丙烯；换热器；U型管
Design of Propane Evaporator
Abstract：This article mainly introduces the characteristics of U type tube heat exchanger, including main structure and the application and development prospects in industry . I described in detail the calculation of thermodynamic calculation of heat exchanger and strength design of U type tube. In this design, l consulted some reference books such as: "steel fixed tube plate heat exchanger structure design" and GB151-1999 . Considering various factors, structural design should be reasonable and economic. The structure calculation of the heat exchanger includes the choice of materials, and to determine the thickness according to the design pressure , the main structure size, which can meet the strength requirements. Whatever, I also need to choose other parts , such as: gasket, flange and so on according to the design conditions for their properselection. So the design results can achieve the optimum combination.
KeyWords：propane；propylene；heat exchanger；U type tube
目 录
1 绪论 1
1.1 课题介绍 1
1.2 课题研究内容 1
1.3 选用U管式换热器的依据和意义 2
1.4 蒸发式换热器研究与应用的意义 2
2 换热器热力计算 4
2.1 热力计算 4
2.1.1 确定物性数据 4
2.1.2 热量衡算 4
2.1.3 流动空间及流速的测定 4
2.1.4 计算总传热系数 4
2.1.5 换热器核算 7
2.2 阻力计算 10
3 换热器结构设计 12
3.1 换热器材料选择 12
3.2 管箱圆筒设计 12
3.3 壳体圆筒设计 13
3.4 封头设计 14
3.5 接管和开孔补强 15
3.5.1 接管外伸长度 16
3.5.2 接管与筒体、管箱壳体的连接 16
3.5.3 壳程接管位置最小尺寸 16
3.5.4 管箱接管位置最小尺寸 16
3.5.5 开孔补强 17
3.6 折流板和支承板 18
3.6.1 折流板尺寸 18
3.6.2 折流板的布置 19
3.6.3 折流板的固定 19
3.7 防冲板 20
3.7.1 防冲板的形式 20
3.7.2 防冲板的位置和尺寸 21
3.7.3 导流筒 21
3.8 防短路结构 21
3.8.1 旁路挡板的结构尺寸 22
3.8.2 挡管 22
3.8.3 中间挡板 22
3.9 拉杆 22
3.9.1 拉杆的结构型式 22
3.9.2 拉杆的直径和数量 23
3.9.3 拉杆的尺寸 23
3.9.4 拉杆的布置 23
3.9.5 定距管尺寸 23
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