Ultrafine pulverized-coal contained in the tertiary air was used as the reburning fuel and the oxygen level of the tertiary air was reduced with the use of flue gas recirculation(FGR).

• 该再燃系统利用三次风中的超细煤粉作为再燃燃料,并通过烟气再循环来降低三次风中的氧浓度。