摘要
对200t/d的秸秆直燃炉排锅炉燃烧进行了数值模拟,通过改变一、二次进风风量比例,计算出不同工况条件下床层顶部各组分的温度、速度和浓度分布,以及床层燃烧效率和炉膛气相的燃烧特性。模拟结果表明,当一、二次进风风量比例为1.3∶0.7时,炉膛出口CO浓度最小为0.29mol/m3,此时炉膛出口烟气平均温度为1180K,O2浓度为2.18mol/m3。模拟结果与有关文献测量值吻合较好。
As one of the widely utilized renewable energy of environmental protection materials, straw can generate electricity by burning directly. Mathematical modeling methods have been employed to simulate a straw-fired grate boiler, not only the temperature, velocity and concentration distributing of the top of bed in different conditions, but also the burning rate of bed and burning character of furnace chamber were calculated, by varying the ratio of primary air and the second air. The results showed that when the ratio of primary air and the second air is 1.3：0.7, the lowest value of concentration of CO is 0.29 mol/m^3, the average temperature of furnace chamber outlet is 1 180 K, and concentration of O2 is 2.18 mol/m^3. It is proved that the simulation results compared reasonably well with the relative literature measurement data.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2008年第4期73-77,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
广东省自然科学基金研究团队资助项目(项目编号:003045)
关键词
锅炉
秸秆直燃
燃烧
数值模拟
Boiler, Direct burning of straw, Burning, Numerical simulation
