摘要
针对煤层气热值低的特点,设计了一台煤层气旋流燃烧器,采用数值模拟方法研究了不同热负荷及过量空气系数对燃烧性能的影响,并计算了燃烧污染物的生成.结果表明,在燃烧区域存在逆压梯度,加强了烟气的扰动,有利于形成稳定的高温区,提高燃烧效率.燃烧器负荷调节范围大,低负荷时仍能保持较高的燃烧温度和燃烧效率.过量空气系数为1.05时燃烧温度最高,此时NOx生成最多,仅为25.1 mg/m3.
A swirled burner is designed for burning low heat value of coal-bed methane.The influence of heat load and excess air coefficient on combustion performance is studied by numerical simulation,and combustion pollutant is calculated.Results show that counter pressure gradient is existed in the burning zone,and its existing can strengthen the flue gas disturbance,generate a high temperature zone and increase the combustion efficiency.The designed burner has a wide range of load adjusting.High combustion temperature and combustion efficiency can be kept even in the low load.The combustion temperature is the highest in the numerical simulation when the excessive air coefficient is 1.05,but the generation amount of NOx is only 25.1 mg/m3 at this condition.
出处
《煤炭转化》
CAS
CSCD
北大核心
2011年第3期71-74,共4页
Coal Conversion
基金
重庆市重点基金资助项目(2009BA6067)
关键词
低热值煤层气
旋流燃烧器
数值模拟
NOx
low calorific value coal-bed methane
swirled burner
numerical simulation
NOx
