... DZL Series Coal fired steam(hot water) boiler 1.ISO9001 certificate 2.Satisfied after-sale service ... blower,Slag extractor,Dirt catcher,Coal conveyor,Soften water,Small pump,economizer,Electrical Cabinets and so ... active area of the grate (m2)suitable coalexhaust gas (°C)Design efficiency(%)DZL1-0.7-AII10. ... 71702031.332Type II gas coal14374.5DZL2-01.0-AII2118320563.614575.36DZL4- ...