摘要： 本次设计遵循锅炉运行的安全性和可靠性准则，同时也要将传热、燃烧、烟气、空气、工质的特性考虑进去。在锅炉设计的过程中，要保证炉内持续燃烧，炉膛确保有足够的辐射热量。锅炉采用双锅筒横置式布置，在锅炉主要燃烧区域，单个热管以相等的间隔布置，并且布置在烟道气流通道的多层热管中，从而可以更有效地吸收烟气中所含的大量热量。为了满足锅炉的设计负荷和排气温度，降低沿途热损失，提高锅炉的热效率，可通过反复检查主要受热面的计算，调整设计温度与结构逐渐将误差降低到可接受的水平。在整个设计过程中需要进行炉膛、凝渣管、过热器、锅炉管束、省煤器、空气预热器的结构及热力计算，最后利用CAD来完成锅炉各部件的总图。71997

毕业论文关键词： 蒸汽锅炉；结构设计；热力计算

Thermal Design of SHL15-1。25/350-W Type Boiler

Abstract： This design follows the boiler safety and reliability guidelines, and takes into account the characteristics of heat transfer, combustion, flue gas, air, and working fluid。 In the process of boiler design, to ensure that the furnace continued to burn, the furnace to ensure that there is sufficient radiation heat。 The boiler is equipped with a double-drum horizontal arrangement, arranged in the main combustion area of the boiler, equidistant single-layer layout of the hot water pipe, and in the way of flue gas distribution of multi-layer hot water pipe in order to more effectively absorb the flue gas contains a lot of heat。 In order to meet the boiler design load, and reduce the exhaust temperature and heat loss along the way to improve the boiler thermal efficiency, through the main heating surface of the multi-check calculation, adjust the design structure and design temperature will gradually reduce the error to an acceptable level。 In the whole design process need to carry out furnace, slag pipe, superheater, boiler tube bundle, economizer and air preheater’s structure and thermal calculation, and make use of CAD to complete the boiler components of the total map finally。

Keywords： steam boiler; structural design; thermodynamic calculation 

目  录

摘要 i

Abstract i

目  录 ii

1 绪论 1

2 锅炉机构简介 2

3 论证过程 4

3。1 锅炉整体分析 4

3。2 炉膛设计 4

3。3 凝渣管设计 4

3。4 过热器设计 4

3。5 锅炉管束设计 5

3。6 省煤器设计 5

3。7 空气预热器设计 5

4 热力计算 6

4。1 辅助计算及热平衡计算 6

4。1。1 锅炉规范 6

4。1。2 燃料特性 6

4。1。3 辅助计算 6

4。1。4 热平衡计算 10

4。2 炉膛计算 13

4。2。1 炉膛结构设计 13

4。2。2 炉膛热力计算 17

4。3 凝渣管计算 21

4。3。1 凝渣管结构计算