超细煤粉再燃技术及其低NO_x排放分析

Analysis on reburning technology of micronized coal and its low NO_x emission

超细煤粉再燃技术是燃煤电站实现低NOx排放的关键技术之一.结合超细煤粉再燃机理,对低NOx排放的主要影响因素:燃料特性、煤粉细度、在再燃区的停留时间、再燃区反应温度、再燃燃料比和过量空气系数等进行了综合分析,得出了只要燃烧条件选择合理,采用低挥发分的烟煤代替高挥发分的烟煤或褐煤作为再燃燃料也是可行的结论.

Micronized coal reburning technology is one of the key technology that power plant realizes low NOx emission. Combining the mechanism of micronized coalreburning technology, analyses synthetically the main factors to influence low NOn emission, such as the characteristics and fitness of pulverized coal, time of pulverized coal resting on reburning area, reaction temperature of reburning area, proportion of reburning fuel, excess air coefficient and so on. Draw the conclusion that if select reasonable burning condition it is feasible substitute low volatility coal for high volatility coal or lignite.