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13.7 Fire grates.
The KSM-Multistoker XXL has a moving floor which means that the fire grates in the burning chamber,
are moveable. This contributes that the XXL boiler is really good at burning difficult fuel.
The grates are divided in sections measuring 30 cm. The 1
st
section is not moveable, the 2
nd
Section is
movable, the 3
rd
Section is not moveable and the 4
th
Section is movable. In the boiler 750 XXL and 1000
XXL there is additional two grates. The 5
th
grate is not moveable and the 6
th
is movable.
The grate where the fuel is delivered has to remove a most of material and therefore this grate has to run
more than the next and the last grate where the fuel almost is burned before it arrives has to run at least.
It is important that the grates are adjusted correct.
If the grates are running to little the fuel will accumulate in the back of the boiler and there is danger that
the top stones are lifted above the burning chamber which results in the stones falls down and crashes.
If the grates are running too much it results in the fuel is not burned appropriately before it dumps down
in the ash screw. You do not get the full value of your fuel and you risk transporting glows out in the ash
system.
On this picture you can see the mentioned parts.
Ash screw
Grate 2
Fixed grate Primary air Moving grate 1
Fixed grate Service door
Adjustment possibilities is described in section 7.6.4