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随着科学技术的进步和国家对节能环保要求的提高，电力工业的发展日益受到资源和环境等因素的约制，以降低能源消耗，减少污染物为目标的节能减排能力成为衡量一个企业竞争力的首要标准。我国能源的主要结构以煤炭为主容量也随之增加，我国越来越多的采用大容量、高参数机组。燃烧器作为煤粉锅炉燃烧设备的主要组成部分，它的性能好坏对燃烧的稳定性和经济性有很大的影响。本次毕业设计的是锅炉容量为1025 t/h的旋流煤粉燃烧器，论文首先通过对所给煤种进行的工业分析，确定了煤种实际的发热量、锅炉的基本参数、理论空气量和烟气量，并最终确定了炉膛燃料消耗量等；然后，计算炉膛的结构尺寸，先假定炉膛的容积热负荷和截面热负荷，计算出炉膛的容积和截面积以及炉膛的主体高度，并根据煤种特性来初步选定煤粉燃烧器的类型和布置方式，针对燃烧煤种和锅炉容量选择合适的制粉系统；最后，计算燃烧器的出力，确定一、二次风的风量，在此基础上，最终确定出燃烧器的喷口截面尺寸和燃烧器的阻力。48897
毕业论文关键词 电站锅炉 旋流煤粉燃烧器 炉膛结构 热力计算
Design of Dc Pulverized Coal Burner of 1025t/h Pulverized Coal Fired Boiler
Abstract With the growth of national economy and 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 1025t/h 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 size 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 the appropriate milling system on the basis of the coal properties and the boiler capacity. 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 1025t/h Dc pulverized coal burner Design Thermodynamic calculations
1 绪论 1
1.1 旋流式燃烧器的特点和发展 2
1.1.1 旋流煤粉燃烧器的作用 3
1.2 旋流煤粉燃烧器的特点 3
1.3 旋流煤粉燃烧器的空气动力特性 3
1.4 新型燃烧器的发展 3
1.4.1 .WR燃烧器 3
1.4.2 水平浓淡低NOx燃烧器 4
1.4.3 钝体燃烧器 4
燃烧器设计的思路和需要注意的问题 5
1.5 设计的主要思路 5
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