Boiler characteristics

The boiler adopts the most suitable combustion equipment for biomass fuel combustion-reciprocating grate. In terms of structural design, the boiler has a larger furnace space than traditional boilers. At the same time, the arrangement of very reasonable secondary air is conducive to the full combustion of a large amount of volatile components that are released instantaneously when biomass fuel is burned.

The boiler can be equipped with oil (gas) ignition burner to realize ignition automation. The boiler’s feeding, combustion, slag removal, water feeding and ignition can all be automatically controlled, and the operation is very convenient. The boiler is equipped with an automatic ash removal device, which can remove ash deposits on the heating surface of the boiler in time to ensure efficient and stable operation of the boiler. An economizer is arranged at the rear of the boiler, and an air preheater can also be arranged according to user needs. Compared with traditional boilers, the boiler has higher efficiency and lower exhaust gas temperature.

Using high-efficiency insulation materials, the boiler surface temperature is low, and the heat dissipation loss can be neglected. It is produced in strict accordance with Chinese national norms and standards, and all pressure parts are made of high-quality boiler steel. Each boiler must undergo strict inspection and testing before leaving the factory, including hydraulic test and X-ray inspection. There are manholes, inspection doors, fire viewing holes, etc., which are very convenient for maintenance. The biggest feature of biomass boiler is: energy saving, environmental protection, and easy to install and use.

Fuel supply

The fuel of the boiler is BMF fuel. The fuel is sent to the furnace top bunker by the feeder, and then sent to 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, catching fire, 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%. The boilers are larger in size and burn more fully, and the efficiency of the boiler is also higher. The highest reached 88.3%, which is 15% higher than the average efficiency level of coal-fired boilers.