摘要空压机在压缩空气过程中会产生大量的热量，，并加以循环再利用。通过在原有空压机冷却系统的基础上加以改造，增加一套余热回收系统。在装置结构方面，该余热回收装置的主要回收余热设备——即冷却器，是本课题的设计重点。所以，本课题主要旨在对冷却器进行传热计算和结构传热的设计。79892

本次设计的题目是空压机余热回收装置的设计，课题预期需要达到的目标为：

所设计的冷却回收换热器，在不影响空压机正常运行的情况下，将空压机工作时产生的余热，吸收用于满足厂区内500名职工的日常生活用热水供应，并要求生活热水温度在

毕业论文关键词：余热回收；换热器；结构设计；强度；热力计算

Abstract  Air compressors in the process of compressed air will produce a lot of heat, while the resulting part of the heat is directly discharged into the atmosphere。This mode of production not only lost a lot of heat, but also caused a significant increase in the production of cooling water power consumption。In order to recover this part of the loss of heat, and to be recycled。 Through the original air compressor cooling system based on the transformation, adding a set of waste heat recovery system。In the structure of the device, the main waste heat recovery equipment of the waste heat recovery unit, that is, the cooler, is the design focus of this subject。 Therefore, the main purpose of this project is to design the heat transfer of the cooler。

  The design of the topic is the air compressor waste heat recovery device design, the project is expected to achieve the goal:

The design of the cooling recovery heat exchanger, without affecting the normal operation of the air compressor in the case of air compressor work will produce waste heat, absorption is used to meet the plant 500 employees daily water supply, and requirements Life hot water temperature around 60 °C。Which requires the calculation of the heat transfer area of the heat exchanger (the actual heat transfer area of 99mm2), the calculation of the pressure drop of the shell (less than or equal to 0。3Mpa)。Calculation of the size of the process structure: the number of pipes (2 pipe), the heat pipe (inner diameter: 19mm, the number: 256), the shell diameter (600mm), the shell number (1 shell) The choice of plate (type: bow baffle; number: 34) and so on。

Calculation of the strength of the heat exchanger: the cylinder, the thickness of the box calculation and verification of the shell and the box of the hole reinforcement calculation。 After the water pressure test, the pressure check calculation, the results show that the strength of qualified。

The body design of the heat exchanger includes: baffle plate, flange (type flat welding flange), bearing (saddle bearing), gasket (asbestos rubber sheet gasket), heat transfer tube Specification selection。

KeyWords：waste heat recovery; heat exchanger; structure design; strength; thermodynamic calculation 

目  录

1  引言 1

1。1 空压机余热回收系统的用途 1

1。2 余热回收系统中冷却换热器的分类 1

1。3 余热回收装置的发展现状 1

1。4余热回收装置的结构原理介绍 2

2 回收装置冷却器热力计算与阻力计算 4

2。1 换热器类型 4

2。1。1 流动空间的选择 4

2。2 确定物理数据 4

2。2。1 原始数据