The BioGrate is a rotating grate with a conical primary combustion chamber. The fuel input ranges from 4 to 20 MW.
The fuel is fed from underneath to the center of the grate. The fuel dries in the middle of the grate by the heat radiating from the refractory lining bricks and the flames without disturbing the burning fuel bed in the combustion zone. After the practically complete combustion of the residual carbon, the ash falls from the edge of the grate to the ash space filled with quenching water.