半水煤气变换气换热器的设计+CAD图纸
毕业论文关键词：列管换热器；工艺计算；结构设计；校核
Design of Semi-water gas-Converter gas Heat Exchanger
Abstract：This paper introduces the design and calculation of shell and tube heat exchanger. This kind of heat exchanger has many advantages such as good heat transfer effects, fastening structures, flexible operations and so on. But its biggest drawback is the heat transfer efficiency is very low. As used herein, it is a single shell and tube pass heat exchanger with Semi-water gas goes through the shell pass. The design calculation can be pided into two parts, processes and structures. Through process calculation, we can get qualitative temperature, flow rate, heat transfer coefficient and the other parameters to determine size of the shell and the specifications of the tube. Then it tells the structure design of the heat exchanger, choosing the material and calculating the main structure such as shell, head, exchanger tubes as well as other shell-tube accessories like nozzles, baffled, impingement baffle, guide shell, skirt and so on. Finally, the hydraulic test is used to check the structure can meet requirements or not.
KeyWords：tubular heat exchanger；process calculation；structure design；check
目 录
1 绪论 1
1.1 概述 1
1.2 研究换热器的意义 1
1.3 国内外换热器的发展与研究成果 1
1.4 管程结构发展 2
1.4.1 螺纹传热管 2
1.4.2 波纹传热管 3
1.4.3 三文内肋管 3
1.5 支撑结构的发展 3
1.5.1 多弓形折流板 3
1.5.2 折流杆支撑 4
1.5.3 管式自支撑 4
1.6 列管换热器的分类 4
1.6.1 固定管板式列管换热器 4
1.6.2 浮头式列管换热器 5
1.6.3 U型管列管换热器 5
1.7 课题研究的内容 5
1.8 创新点及难点分析 6
2 换热器热力计算 7
2.1 物性参数计算 7
2.2 热力计算 11
2.2.1 确定物性数据 12
2.2.2 热量衡算 12
2.2.3 流动空间及流速的测定 13
2.2.4 计算总传热系数 13
2.2.5 换热器核算 16
2.2.6 阻力计算 18
3 换热器结构设计校核 20
3.1 材料的选择 20
3.2 筒体的设计 20
3.2.1 筒体壁厚的计算 20
3.2.2 水压试验 21