U形管式换热器设计
- 格式：doc
- 大小：1.45 MB
- 文档页数：67
I 摘 要
本文介绍了U形管换热器的整体结构设计计算。U形管换热器仅有一个管板，管子两端均固定于同一管板上，管子可以自由伸缩，无热应力，热补偿性能好；管程采用双管程，流程较长，流速较高，传热性能较好，承压能力强，管束可从壳体内抽出，便于检修和清洗，且结构简单，造价便宜。U形管式换热器的主要结构包括管箱、筒体、封头、换热管、接管、折流板、防冲板和导流筒、防短路结构、支座及管壳程的其他附件等。
本次设计为二类压力容器，设计温度和设计压力都较高，因而设计要求高。换热器采用双管程，不锈钢换热管制造。设计中主要进行了换热器的结构设计，强度设计以及零部件的选型和工艺设计。
关键词：U形管换热器；结构；强度；设计计算
II
Abstract
This paper introduces the U-tube heat exchanger design and calculation. U-tube
heat exchanger has only one tube sheet, tubes are fixed at both ends of boards in the
same tube, and tubes could telescopic freely, non-thermal stress, thermal performance
and compensation; use of double-tube process, the process is longer, higher speed,
better heat transfer performance, pressure capacity, and control can be extracted from
the shell with easy maintenance and cleaning, and simple structure cost less. The main
structure of U-tube heat exchanger, includes Equipment control, shell, head,
exchanger tubes, nozzles, baffled, impingement baffle, guide shell, anti-short-circuit
structure, support and other shell-tube accessories.
This time I designed a second category pressure vessel, which has high design
temperature and high design pressure. Thus the design demands are strict. It has dual
heat exchanger tube, stainless steel heat exchanger manufacturers. I mainly carried
out the design of heat exchanger structural design, strength of design and parts
selection and process design.
KEYWOEDS: U-tube heat exchanger；frame；intensity；, design and
calculation
III 目录
摘 要 .................................................................
I
ABSTRACT ................................................................. II
第1章 绪论 ............................................................. 1
管壳式换热器。 ............................................................ 1
1.1 概述 .................................................................. 1
1.2 管程式换热器结构 .................................................. 3
1.2.1 分类及特点 .................................................. 4
1.3 流道选择 .......................................................... 7
1.4 材料选择 .......................................................... 7
1.5 管壳式换热器的传热强化技术 ........................................ 8
1.6 主要控制参数 ...................................................... 8
1.7 选用要点 .......................................................... 9
1.8 施工、安装要点 .................................................... 9
1.9 管壳式换热器腐蚀分析 ........................................... 10
1.10 管壳式换热器的防腐保护 .......................................... 11
1.11 新型换热器简介 .................................................. 11
第2章 U形管式换热器结构设计 ............................................ 15
2.1 U形管式换热器结构介绍 ........................................... 15
2.2 筒体设计 ......................................................... 16
2.3 封头设计 ......................................................... 16
2.4 管箱设计 ......................................................... 19
2.5 布管 ............................................................. 22
2.5.1 换热管的排列方式 ........................................... 22
2.5.2 换热管中心距 ............................................... 23
2.5.3 换热管与管板的连接 ......................................... 24
2.6 管板设计 ......................................................... 25
2.6.1 管板的加工 ................................................. 26
2.7 折流板 ........................................................... 26
2.7.1 折流板的形式 ............................................... 27
2.8 拉杆 ............................................................. 28
IV 2.8.1 拉杆的直径、数量及布置 ..................................... 29
2.9 定距管 ........................................................... 30
2.10 裙座的设计 ...................................................... 30
2.10.1 裙座的结构 ................................................ 31
2.10.2 裙座的材料 ................................................ 31
2.11 起吊附件 ........................................................ 31
第3章U形管式换热器的强度计算与校核 ..................................... 32
3.1 换压力热器的计算 ................................................. 32
3.2 筒体计算 ......................................................... 33
3.2.1 筒体厚度计算 ............................................... 33
3.2.2 压力试验时应力校核 ......................................... 34
3.2.3 压力及应力计算 ............................................. 34
3.3 前端管箱筒体计算 ................................................. 35
3.3.1 管箱筒体的厚度计算 ......................................... 36
（1）筒体的计算厚度 ............................................ 36
3.3.2 压力试验时应力校核 ......................................... 36
