Reduction of Particulate Matter Emissions from a Pellet Boiler Using Primary Measures

The use of primary measures to reduce particulate matter, CO, and NO_x emissions can be feasible for pellet boilers fired with a standardized fuel with low quality variations. At the same time, the use of lower-quality pellets such as A2 or I2 can be realized without the need for secondary emission reduction measures. Here, the possibility of particulate matter reduction through the use of primary measures is discussed, demonstrating that particulate matter emissions can be significantly reduced with the aid of primary measures such as air staging and exhaust gas recirculation. However, the use of these measures also influences other emissions, such as CO and NO_x from the furnace.