WinterGreen Wood Furnaces IM-130, Руководство пользователя

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FURNACE - INTRODUCTION
Continued:
Wood Gasification
Wood gasification is the process of heating wood in an oxygen-limited chamber until volatile gases
(carbon monoxide, hydrogen, and oxygen) are released from the wood and combusted. Heating the
wood to the temperature range of 400-600 degrees releases most of the gases. The emitted wood
gases are then superheated and mixed with air for complete combustion, leaving little or no ash, and the
heat produced is transferred to the boiler for heating.
This process takes place in two stages, through the cross draft combined with the very high tempera-
tures of the refractory (1500-2000 degrees). The extreme radiant energy from the refractory raises the
wood temperature for gasification, while limiting the oxygen in the primary zone. As the gases rise, the
preheated draft air combines with them and completes the combustion. The long flame path combined
with the turbulence and reverse flow assures complete combustion. During each off-cycle the radiant
heat from the refractory combined with the lack of oxygen prepares the wood for the next cycle.