6. AUTOMATIC VARIABLE SPEED ASH GRATE ACTIVATOR
The Gas Producers are fitted with an electric, variable
speed ash grate activator and with ash
removal and refuelling systems for non-interrupted,
continuous working. They are also
supplied with 12-or 24 volt DC electronic fuel level
indicators and with a red flashing early
refuelling warning light which can, depending on the local
noise control regulations, be
combined with a sound alarm.
An electronic DC flashing red light ash removal warning
system is provided for continuous
non-interrupted working, with an ash-box having a normal
minimum 5 hour storage capacity
when using hard wood fuel. The soot and ash removal can also
be modified for automatic
continuous removal below the safety air-lock valve, which
must not be removed, by using a
slat conveyor submerged in a water filled portable steel
trough, or by using a double air-lock
auger conveyor.
When the ash grate speed is correctly adjusted the total
loss of ash and carbon duffing, when
using Eucalyptus Camaldulensis or Eucalyptus Sideroxylon
wood, has been below 3,9% by
weight of the wood fuel while the ash is also prevented from
diluting the reduction char coal.
This allows for safe continuous operation while the raw-gas
temperature is lowered through
the charcoal reduction inside the inverted reduction cone,
to the acceptable gas temperature
allowed for in the design.
The ash grate activator drive motor is protected against the
excessive temperature.
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