Direct firing system
The fuel is blown in according to the injector principle. In other words, no fuel enters the blower fan, avoiding fan wear. The heat storage in the ceramic lining ensures correspondingly high combustion chamber temperatures for very low emissions values. The horizontal 3-pass flame tube-flue tube boiler is installed on top of the combustion chamber as a warm or hot water boiler. Steam boilers or thermal oil boilers can also be supplied, if needed.
Designed for the wood industry
The Pyroflex VFE was specially designed for industrial wood processing. Even fuels like MDF or chipboard scraps pose no problem for this firing system.
The low-NOx combustion chamber is designed with primary-side measures such as air staging to reduce NOx emissions. Regulation of the primary air supply together with flue gas recirculation ensures substoichiometric combustion in the reduction zone.
Secondary air is injected after the reduction zone of the combustion chamber. The corresponding firebox geometry combined with the combustion air injection ensures high turbulence and mixing with the flue gas, resulting in optimal oxidation (CO burnout) of the combustion gases.
Flue gas recirculation
The flue gas is drawn into the exhaust line and reintroduced to the combustion chambers with a fan. This decreases the flame temperature and reduces nitrous oxides. The efficiency of the system is increased as a result since a lower residual oxygen content remains in the flue gas, even in the case of dry fuels.