A system in accordance with EN303-5 standard. The fuel is stored in an appropriate silo from where it can be led to the feed hopper inside the boiler room via a screw conveyor. The level of the tank is measured by using a capacitive sensor. Fuel flows through the rotation valve via the feeder screws to the combustion end of the burner (2).
Burning occurs in the combustion end and the flame is conducted inside the boiler (1.1). The automation adjusts the burning steplessly. If needed, the fuel supply and combustion-air fans react quickly to the fluctuation of power requirements by increasing or decreasing the power. The combustion air is controlled, using precise air-flow regulators and LAMBDA measurement. The heat is transferred from the boiler’s convection surfaces to the boiler water, which is kept at a consistent temperature maintained by using the PT-100 measurement.
The burned out fuel is pushed out as ash into the boiler’s ash space with the help of the hydraulically moving grate aggregate. The ash is transported with screw conveyors (5) into a large ash receptacle (6) located outside the building.
The vacuum-controlled flue gas fan (7) keeps the boiler’s vacuum, i.e., draught, as desired, thus enabling the use of a wide power range.