若干因素对电站锅炉飞灰含碳量影响的数值研究  

Numerical Study on Several Factors' Effects on Carbon-in-ash in Utility Boilers

作　　者：陈世和[1] 罗嘉[1] 张曦[1] 季俊杰 

机构地区：[1]广东电网公司电力科学研究院,广东广州510080 [2]上海开利研发中心,上海201206

出　　处：《锅炉技术》2015年第1期40-44,共5页Boiler Technology

摘　　要：基于用户自定义函数(UDF)技术改进了Fluent自带的煤粉焦炭燃烧模型,并利用该改进模型对若干因素如空气过量系数、一次风率、燃烧器摆动角度等对飞灰含碳量的影响和作用机制进行了数值研究。结果表明,空气过量系数和一次风率都有一个最佳值,而燃烧器上摆角度和二次风切圆直径越大,飞灰含碳量越高。This paper improves the Fluent built-in char combustion model based on user defined function （UDF） technology. Then, the model is used to study the effects on carbon- in-ash and the influencing mechanism from several factors, such as air excessive coefficient, primary air ratio, and burner tilting angle. The result shows that the air excessive coefficient and the primary air ratio both have an optimized value. And with the increasing of burner uptilting angle or secondary air＇s tangential circle diameter, carbon-in-ash at the furnace outlet rises.

关 键 词：煤粉燃烧 飞灰含碳量 缩核模型 数值模拟 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]