YLW series coal/biomass thermal oil boiler adopts Square coil horizontal structure,chain grate automatic fuel feeding, FD/ID fan mechanical ventilation,slag remover for mechanical slag removing while running,the burning fuel enter into the chain grate through the fuel hopper,then burn,The high-temperature flue gas is reflected to the front of the furnace by the rear arch and enters the furnace chamber. After radiation heat transfer by the radiation heating surface, it enters the convection heating surface for convection heat transfer.then enter into waste heat recovery boiler/air pre-heater, dust catcher, ID fan ,finally discharged into air by chimney products features: 1. Multi-loop coil design 2. Countercurrent heat transfer process 3. Over oil temperature/over smoke temperature/low flow alarm 4. Set up air preheater, waste heat boiler 5. New "α" furnace arch 6. Advanced and scientific fabric technology