600MW电站锅炉直流煤粉燃烧器系统设计+CAD图纸
毕业论文关键词： 锅炉；煤粉燃烧器；集中配风
Design of Dc Pulverized Coal Burner of 600MW Pulverized Coal Fired Boiler
Abstract: With the growth of national power load, electrical network capacity has increased rapidly in China. More and more 600MW pulverized coal fired units with high capacity and parameters have been used. As the main part of pulverized coal fired boiler’s combustion equipment, pulverized coal burner has the very tremendous influence to stability and economy of combustion. The content of this graduation thesis is to design the Dc pulverized coal burner of 600MW pulverized coal-fired boiler. Firstly, by the industry analysis to the given coal, it is identified that the actual coal heat, the basic parameters of the boiler and theoretical air volume and flue gas volume, and then the fuel consumption in the furnace is determined therefore. Secondly, calculating the structure of the furnace. By assuming volumetric heat load and sectional heat load, we can calculate the volume and cross-sectional area and the main body altitude of the furnace. And next according to the coal properties, preliminary select the type and arrangement of the burner. Finally, choosing appropriate pulverized coal system on the basis of the coal properties and the capacity of the boiler. When all the work above is finished, it is possible to calculate the output of the burner and the volume of primary air and secondary air. At this point we can determine the section size of the burner nozzle and the resistance of the burner definitively.
Keywords: boiler；pulverized coal burner；Centralized air distribution
目录
1 绪论 1
1.1 直流式燃烧器的特点和发展 1
1.2 新型燃烧器的发展 2
1.3 燃烧器设计的步骤 4
2 燃料性质和燃烧计算 5
2.1 基本资料和燃料分析 5
2.2 燃料的燃烧计算 7
2.3 锅炉热平衡计算 9
2.4 小结 11
3 炉膛型式及燃烧方式的确定 12
3.1 锅炉本体布置 12
3.2 炉膛的容积和截面积计算 12
3.3 炉膛主要结构尺寸的确定 13
3.4 炉膛校核热力计算 18
3.5 小结 22
4 燃烧器的选型和计算 23
4.1 燃烧器选型和布置方式确定 23
4.2 燃烧器制粉系统的选择 24