木质成型燃料取暖炉燃烧数值模拟与优化

为了强化木质成型燃料取暖炉燃烧效果,减少污染排放,提高采暖炉热效率,引入旋流燃烧技术,提出新型木质成型燃料旋流炉排燃烧器。数值模拟取暖炉在不同过量空气系数和不同炉排二次风入口角度条件下,炉内速度场、温度场、浓度场的变化。结果表明:通过旋流二次风产生高温回流区,有效强化了燃烧,提高了炉膛有效利用面积;过量空气系数为1.5、二次风入口倾角为30°时,燃尽率高,烟气温度分布均匀,污染少。

Numerical Simulation and Optimization on Combustion of Wood Briquette Heating Stove

The technology of swirling combustion and a new kind of wood briquette fuel swirling burner were proposed to improve thermal efficiency and reduce pollution emissions of the wood briquette heating stove. Numerical simulation on combustion processing of different excess air coefficient and different inclination between the secondary air inlet and grate wall in the heating stove was considered, aiming to solve the velocity, temperature and concentration field. The results reveal that high temperature backflow zone coming out through rotational flow secondary wind effectively strengthened combustion and improved the furnace using area; combustion efficiency is the highest and pollution is the lowest, when excess air coefficient is 1.5 and inclination angle is 30°.