... Boilers Introduction, fuel adaptability. It can burn high-quality coal, can burn a variety of low-grade fuel. Heat ... 6281 ~ 10468kJ/kg (1500 ~ 2500cal/kg) oil shale, coal, coal gangue, bituminous and anthracite blended layer burning boiler slag unburned ... fed into the fluidized bed coal feeder, adjustable speed, constantly churning strongly burning coal particles by high pressure air. Fuel long ...