Specifications
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PYROLYSIS OF WOOD
The wood gasification is a traditional technology that im-
proves efficiency of the wood combustion. The combustion
means rapid oxidation of material, when the warmth is released.
Operation of the wood gasifying boiler can be divided into three
processes - warming and drying of the wooden material in the feed-
ing chamber, decomposition of wood by high temperature and
emission of the wood gas without sufficient oxygen supply and its
burning in the refractory nozzle with supply of the secondary air.
BOILER FUNCTION
By loading the new fuel – at the temperature under
200 °C – it comes to drying of wood.
Near to the nozzle, at temperature of 200–700 °C and
limited air inlet, the wood is scanned, the wood gas is emit-
ted and the solid elements are produced. The emitted gas
flows into the combustion chamber, burns and emits heat
under the sufficient air inlet. The incombustible residuals
are taken through nozzle into ashtray.
Advantage of this approach is, that every combustion
phase has ideal conditions - in the regulated amount of
primary and secondary air, as well as in optimum dif-
ferentiation of temperatures for individual phases of
combustion.
Thanks to the better usage of warmth in the wooden
material there is lower fuel consumption and wide scale
of the output regulation at keeping the high combustion
efficiency.
y Drying of the
wooden material
y Warming
y Emission of the gas
contents
y Combustion
y Gas burn-out, reduc-
tion of CO
WOOD GAS
Under the certain conditions (tempera-
ture, air inlet), the wood is decomposed into
gas, liquid and solid contents. The gas con-
tent is represented by the wood gas, solid
one is the charcoal - basically pure carbon.
The wood gas is emitted while warming
the wood with minimum oxygen inlet, and
thereby it is only produced, not burned.
Heat capacity of the material depends
on its chemical content and content of
combustible substances
.
Wood gas contents 20 % of hydro-
gen , 20 % of combustible CO , 0–10 %
of methane and 50–60 % of non-com-
bustible nitrogen .
Thanks to the high content of inerth
nitrogen, the heat capacity of the wood
gas is in the level of 3,5-8,9 MJ/m
3
.
ATTACK SLX, DPX, DP
MODEL LINE 7000, 6000, 5000