摘要燃气蒸汽锅炉设计的参数为：额定热功率为2800kW，额定出水蒸汽175摄氏度、进水温度为90摄氏度、锅炉功率为90%，使用燃料为天然气，燃气消耗量为137m^3/h（Q=36006kJ/m^3）,排烟温度为200摄氏度，主机净重为5t，漫水容积为3.6m^3，辐射受热面积为5.99m^2，对流受热面积为50.96m^2，烟囱高度为20m，锅炉安全运行的工况范围30-110%，炉膛容积热负荷为248kW/m^3，锅炉的长度设置为3.99m，宽度为1.64m，高度为2.06m。58302

本次设计对屏式过热器、炉膛、低温过热器、高温过热器、高温省煤器、高温空气预热器和低温省煤器，低温空气预热器的结构计算和传热计算，以及对烟道阻力的计算和空气预热器的计算，引风机、送风机的选择。

本次设计中，炉膛出口的烟气温度是600摄氏度，经过屏式过热器烟温下降至400摄氏度，在经过高温过热器烟温下降到350摄氏度，经低温过热器温度下降到300摄氏度，经高温省煤器下降到250摄氏度，经高温空气预热器降至200摄氏度，经低温省煤器下降到185摄氏度，经高温空气预热器降至150摄氏度排烟。

毕业论文关键字：炉膛、过热器、省煤器、空气预热器

Abstract Design parameters for gas steam boiler: the thermal power rating is 2800 kw,the steam rating is 175 degrees Celsius，water temperature is 90 degrees Celsius，the power of the boiler is %90,fuel is gas,gas consumption is 137 m ^ 3 / h (Q = 36006 kJ/m ^ 3),exhaust smoke temperature is 200 degrees Celsius,the weight of machine is 5t,flood water volume is 3.6 m ^ 3,radiation heating area is 5.99 m ^ 2,convection heating surface is 50.96 m ^ 2,the chimney height is 20 m.The safe operation condition of the boiler ranges of 30-110%,furnace volume heat load is 248 kw/m ^ 3,the length of boiler is 3.99m,width is 1.64 m,height is 1.64 m.

The design on the platen superheater, furnace, low temperature superheater, high temperature superheater, economizer in high temperature and high temperature air preheater and low temperature economizer, low temperature air preheater structural calculation and heat transfer calculation, and the flue resistance calculation and the calculation of air preheater, the choice of induced draft fan and blower.

    In the design , the furnace exit flue gas temperature is 600 degrees Celsius,after smoke platen superheater temperature drops to 400 degrees Celsius,after high temperature superheater smoking temperature drops to 350 degrees Celsius,after low temperature superheater temperature drops to 300 degrees Celsius,after high temperature economizer drops to 250 degrees Celsius,after the high temperature air preheater drops to 200 degrees Celsius,after low temperature economizer drops to 185 degrees Celsius,after high temperature to150 degrees Celsius in air preheater smoke.

Keywords: furnace,superheater, economizer and air preheater.

 目录

第一章 绪论 1

1.1燃气锅炉的特点 1

1.1.1 热效率高，环境污染低 1

1.1.2 锅炉设备投资少 1

1.1.3运行成本低 2

1.1.4设备维修费用低 2

1.1.5存在的危险 2

1.2燃气锅炉的现状 2

1.2.1国产、进口锅炉并存 2

1.2.2 与燃油锅炉相比，燃气锅炉使用较少 3

1.2.3 国产燃烧器性能有待提高 3

1.3设计燃气锅炉基本思路 4

1.3.1锅炉的基本参数