Biomass boiler for hot water or steam production, automatic feed through fixed grid or mixed
Designed and built for the use of biomass. The supporting structure has a horizontal design and is built with sturdy steel sheets which can resist to thermal stresses and high pressures thrust thanks to tensile bars.
The wet walled large-volume combustion chamber is fitted with side entrances for the distribution of combustion air, and with an openable door for the manual loading of large size fuel and for the periodic cleaning of the grate.
The whole combustion chamber is lined with high-quality refractory bricks rich in alumina content (65%) to achieve a high temperature (between 800 and 1200° C), thus optimizing the combustion.
The smoke circuits horizontal heat exchanger is made with sturdy steel tubes immersed in water and their geometry ensures the best thermal exchange and performance.
The burner has 2 different areas of combustion, one with a fixed grid, one with a movable grid. The movable grid is made with chrome cast iron elements for corrosive and high-moisture fuels (MDF, etc.) and it allows the correct combustion of moist and treated wood scraps and the controlled removal of the ashes toward the extractor, thus avoiding the crystallization of combustion residues. The ashes will be automatically extracted through a special screw extractor.
The mixture of air and fuel is handled continuously through an automatic feeding system with variable flow rate and, at the same time, the combustion air is evenly distributed in the various combustion zones, ensuring high efficiency in the whole thermal cycle.