XINLI BOILER

Biomass boiler high efficiency, energy saving and environmental protection

15 Jul, 2021

　　Fuel supply

　　The fuel of the boiler is BMF fuel. The fuel is fed into the furnace top bunker by the feeder, and then into the furnace by the screw feeder, and is evenly scattered on the grate.

　　burning process

　　The fuel is fed into the furnace by the screw feeder, where it is gradually preheated due to the action of high-temperature flue gas and primary air, drying, igniting, and burning. During this process, a large amount of volatile matter is precipitated and the combustion is intense. After the generated high-temperature flue gas washes the main heating surface of the boiler, it enters the economizer and air preheater of the heating surface at the rear of the boiler, then enters the dust collector, and finally is discharged into the atmosphere through the chimney. The ungasified fuel moves to the back of the grate until it burns out, and finally a small amount of ash and slag falls into the slag removal port behind the grate.

　　Environmentally friendly emissions

　　The ash produced by BMF combustion accounts for about 1.5% of the fuel. In order to facilitate ash discharge, a spiral slag discharger is arranged at the rear of the boiler to realize continuous ash removal. A dust collector is arranged in the flue at the tail of the boiler to ensure that the smoke and dust emission meet the environmental protection requirements.

　　boiler efficiency

　　The efficiency of biomass boilers is generally above 80%. Larger boiler models provide more complete combustion and higher boiler efficiency. The highest reached 88.3%, which is 15% higher than the average efficiency level of coal-fired boilers.