烟气再循环及分段送风对链条炉NO_x生成的数值模拟  

Numerical simulation for influence of flue gas recycle and zoned air on NOx formation in chain boiler

作　　者：胡满银[1] 韩静[1] 刘忠[1] 林蔚[1] 

机构地区：[1]华北电力大学环境科学与工程学院,河北保定071003

出　　处：《洁净煤技术》2010年第3期71-73,70,共4页Clean Coal Technology

摘　　要：以某10t/h链条炉为研究对象,运用FLUENT软件分别对此链条炉在无烟气再循环和采用烟气再循环技术时炉膛内的燃烧过程、温度场以及NO_x的生成情况进行数值模拟。并且比较了循环烟气从一次风口和二次风口进入炉膛这2种不同情况。模拟结果显示:采用烟气再循环技术,炉膛内的平均温度降低,从而降低NO_x的生成量;而循环烟气从二次风口进入炉膛内,生成的NO_x会更少些。该数值模拟结果可为链条炉的设计和运行提供参考。Numerical simulation was used to study the combustion procession, temperature distridution and NOx emission for a 10 t/h chain boiler with and without flue gas recycle. The differences were contrasted when flue gas is recycled to the primary wind inlet and to secondry wind inlet. The results show that the temperature distridution decreased with flue gas recycle and there is less NOx emission. And when flue gas is recycled to secondry wind inlet, the NOx emission dropped mostly. The result offer a reference to design and operate a chain boiler.

关 键 词：烟气再循环 NOx 链条炉 数值模拟 

分 类 号：TD946.2[矿业工程—选矿]