浓淡燃烧在燃气采暖热水炉的应用

Application of Rich and Lean Combustion to Gas-fired Heating Hot Water Boiler

温度和过剩空气系数是影响氮氧化物生成的主要因素。通过实验研究浓燃烧燃气体积与淡燃烧燃气体积之比为4∶6时,浓燃烧、淡燃烧过剩空气系数对烟气中NO_x体积分数的影响。随着淡燃烧的过剩空气系数的增大,燃烧的烟气量增加,燃烧温度急剧降低,大幅度降低热力型NO_x产生量。随着浓燃烧的过剩空气系数的增大,烟气中NO_x的体积分数随浓燃烧过剩空气系数的增大而增大。

Temperature and excess air coeffi- cient are the main factors affecting the formation of ni- trogen oxides. The influence of rich combustion excess air coefficient and lean combustion excess air coeffi- cient on the volume fraction of nitrogen oxides in flue gas when the ratio of the volume of rich combustion gasto the lean combustion gas ments. Along with the lean is 4：6 is studied by experi- combustion excess air coef- ficient increases,the amount of combustion flue gas in- creases, temperature of combustion decreases sharply, and the generation of thermal nitrogen oxides reduces substantially. Along with the rich combustion excess air coefficient increases, the volume fraction of nitrogen oxides in flue gas increases with the increase of rich combustion excess air coefficient.