摘要：随着国家经济的增长，电力行业得到了迅速发展，电网容量逐年增长。电力需求越来越大，电力行业发展迫在眉睫，电力行业越来越向着高参数、大容量的方向发展。其中锅炉效率的高低将直接影响着发电效率的高低，锅炉效率的高低主要取决于燃料燃烧的好坏，而燃烧器性能的好坏又直接影响燃烧的稳定性和经济性，所以燃烧器系统的设计对提高锅炉安全运行十分重要。本次设计是对容量为2000t/h的锅炉进行直流煤粉燃烧器系统设计。首先进行燃料燃烧及锅炉热平衡计算，计算出发热量、空气量、烟气量、燃料消耗量等，再对锅炉主体结构尺寸进行设计并完成热力校核，完成了冷灰斗、折焰角、前后屏过热器的结构尺寸设计，并对炉膛出口烟温进行了校核，最后进行燃烧器的选型和结构设计，确定燃烧器系统的结构及单个燃烧器的结构尺寸。41563
毕业论文关键词：电站锅炉；直流煤粉燃烧器；炉膛；热力计算
Design of Dc Pulverized Coal Burner of 2000t/h Pulverized Coal Fired Boiler
Abstract: With the growth of national economy, the electric power industry has been developing rapidly, and the capacity of the power grid is increasing year by year. Power demand is increasing, the development of the power industry is imminent, the power industry is more and more towards the direction of high parameters, large capacity. The level of boiler efficiency will directly affect the level of power generation efficiency, combustion efficiency of boiler depends mainly on the fuel quality, and the quality of the performance of the combustor will directly affect the combustion stability and economy, so burner system design to improve the operating efficiency of the boiler is very important. This design is the capacity of 2000t / h boiler of direct flow pulverized coal burner system design, design is first fuel combustion and boiler heat balance calculation, calculation of heat, air, gas, fuel consumption, and then on the body of the boiler to design dimension design and complete the check thermal, which completed the of cold ash hopper, fold flame angle, front and rear screen superheater structure size design, check the furnace exit flue gas temperature in the error range.
Keywords: Power station boiler; direct current pulverized coal burner; furnace; thermodynamic calculation;
目录
摘要 ii
Abstract ii
目录 iii
1 绪论 1
1.1 煤粉燃烧器的作用 1
1.2 直流煤粉燃烧器的类型 1
1.2.1 均等配风 1
1.2.2 分级配风 2
1.3 直流煤粉燃烧器的布置方式及工作特性 2
1.3.1 直流煤粉燃烧器的布置方式 2
1.3.2 直流煤粉燃烧器四角切圆燃烧的着火特性 2
1.4 燃烧器设计的思路和需要注意的问题 3
1.4.1 设计的主要思路 3
1.4.2 设计开始前应注意的问题 4
2 燃料燃烧及锅炉热平衡计算 5
2.1 锅炉设计计算原始参数 5
2.2 燃料的数据校核和煤种判别 5
2.3 燃料燃烧计算 7
2.3.1 理论空气量和理论烟气量计算 7
2.3.2 烟气特性分析计算 8
2.4 锅炉热平衡及燃料消耗量计算 9
2.4.1 锅炉热平衡计算 9
2.4.2 燃料消耗量计算 11
2.4.3 烟气焓温表 11
2.5 小结 12
3 炉膛尺寸计算与热力校核 13
3.1 锅炉整体布置型式 13 每小时2000吨锅炉直流煤粉燃烧器系统设计+CAD图纸:http://www.youerw.com/jixie/lunwen_41660.html