摘要：低变气水冷器是换热设备的一类，在工业生产中，凡用来实现冷热流体热量交换的设备，统称为换热器。本文设计了一浮头式换热器。主要参考标准为GB191对换热器进行了结构设计，本设计中换热管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。最后经检测该台冷却器是否满足介质换热的需要。42320

毕业论文关键词：低变气；强度计算；浮头式换热器

The Design Of The Low Variable Gas Water Cooler

Abstract：Low variable gas water cooler is one kind of heat exchanger equipment. In the process of  industrial production, all the devices which are used to realize the hot and cold fluid heater exchange will be called the heat exchanger. This paper design a floating head heat exchanger. The structure of heat exchanger is designed mainly refers to the standard of GB191.The heat exchanger tubes of this design are arranged in a equilateral triangle way. Only this way , can we put more tubes on the same tube sheet. What’s more, the heat modulus of the tube’s outer surface are higher than the same tube sheet. However, due to this head heat exchanger is designed as the double tube, it needs to be arranged in rectangle way on both sides of the pass partition .Finally ,this water cooler will be detected if it can meet the need of heater exchanger medium.

Key Words：Low variable gas; The calculation of strength ; Floating head heat exchanger

目录

摘要 Ⅰ

Abstract Ⅱ

1  绪 论 1

1.1课题背景 1

1.2课题研究的意义 1

    1.3国内外课题研究的进展与成果 2

    1.4 设计目的 3

2  方案的确定 4

2.1设计方案 4

2.1.1 方案要点 4

2.1.2 方案要求 4

2.2 确定物性参数 4

2.3  换热器结构选择 4

3 低变气水冷器工艺计算 5

3.1物性参数 6

3.2 热量衡算 6

3.2.1  热流量 6

        3.2.2  平均传热温差..........7

    3.2.3  管程，壳程对流传热系数 7

    3.2.4  总传热系数 8

3.2.5  计算传热面积 9

3.2.6  管程数和传热管数 9

3.2.7  壳程数 10

3.2.8  传热管排列 10

3.2.9  壳体内径 10

    3.2.10 折流板 11

3.2.11 接管 11

    3.3 换热器核算 12

 4 低变气水冷器整体结构设计 16

    4.1 工艺计算结果 16

    4.2 换热管