Coal burning boiler 1.ISO9001 certificate 2.Satisfied after-sale service 3.One year warranty DZL series coal fired steam/hot water boilerDZL Steam (hot water) boiler composed of the body, chain grate,Draught fan,Blast blower,Slag extractor,Dirt catcher,Coal conveyor,Soften water,Small pump,economizer,Electrical Cabinets and so on.Body comprised the pot shell, smoke box, water wall tube, down tube ...