链条燃煤工业锅炉燃烧优化的数值模拟研究  

Numerical Simulation of Combustion Optimization in Coal-fired Chain Grate Industrial Boiler

作　　者：杨茹 何军飞 胡志锋[2] 马晓茜[2] 余昭胜[2] 

机构地区：[1]广州市能源检测研究院,广州510170 [2]华南理工大学能源高效清洁利用广东普通高校重点实验室,广州510640

出　　处：《工业安全与环保》2014年第4期90-93,共4页Industrial Safety and Environmental Protection

基　　金：华南理工大学能源高效清洁利用广东普通高校重点实验室(KLB10004);广东省大气环境与污染控制重点实验室(2011A060901011);广州市科信局广州市能效检测技术重点实验室([2009]7-06)

摘　　要：运用计算流体动力学模拟软件FLUENT对链条燃煤工业锅炉在不同炉排速度和配风方式下进行了燃烧优化的数值模拟研究,结果表明,炉排速度对工业锅炉的燃烧和NOX生成影响显著,最优的炉排速度为7.2 m/s,此时炉膛和烟道的整体温度水平均表现良好。最佳的配风方式为推迟配风和二次风相结合,增加二次风后,锅炉内的烟气扰动更明显、回流区更强烈,此时锅炉的整体温度水平较合理,高温区集中在炉膛和烟道的中部区域,在后拱处依然能保持着较高的温度水平,并能将后拱的高温烟气带至前拱,且可使NOX的生成量有一定程度的降低。By using the computational fluid dynamics simulation software FLUENT, numerical simulation of combustion optimization in coal - fired chain grate industrial boiler is studied under different grate speeds and air distribution. The results show that the grate speed significantly affects the combustion and NOx production in industrial boilers and the optimal grate speed is 7.2 m/s. At this time, the whole temperature level performance of furnace and flue is good.The best air distribution is the combination of delayed air distribution and secondary air. After adding the secondary air, the flue gas disturbance and recirculation in boiler become more obvious and intense and at this time the whole temperature level in boiler is reasonable. Because the high-temperature zone is concentrated in the central area of furnace and flue, and it could maintain a high temperature level on the back arch, then the high temperatttre flue gas would be brought to the front arch from the back arch. Furthermore, to a certain extent, it could reduce the production of NOx.

关 键 词：燃煤工业锅炉 燃烧优化 数值模拟 氮氧化物 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]