(Vers. 04.19.2023)
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CharBoss T26 Air Curtain Burner for Biochar Processing (HATZ 3H50T Engine)
OPERATING MANUAL
CharBoss T26 Air Curtain Burner for Biochar Processing (HATZ 3H50T Engine)
OPERATING MANUAL
GENERAL DESCRIPTION OF CharBoss
The CharBoss is a design that adds not only mobility but biochar processing to the Air Burners Fire-
Box line of machines, in particular to the popular T24 BurnBoss. When delivered to a job site, the
machine is ready for use as soon as it is off-loaded. The firebox system is built on a patented trailer
frame that allows the firebox to be raised and lowered for easy movement over the ground. The for-
ward equipment deck under the cowling supports a three-cylinder diesel engine, a 20-gallon fuel
tank, the direct drive system and the air fan. In addition the battery and firebox hydraulic controls
are located here. When viewed from the rear of the unit, the patented air disbursement manifold is
mounted on the right top side of the combustion chamber of the firebox.
The diesel engine is directly coupled to the main air fan. The high velocity air is sent down the man-
ifold through the vanes and directed to the outlet nozzles. A balanced and distributed air flow is di-
rected across the top of the firebox and then reflected down into the combustion zone.
The curtain of air acts as a top over the firebox, trapping a large percentage of the escaping partic-
ulate matter (smoke) and causing it to burn down even further under the curtain before finally es-
caping through the air curtain as a hot gas. The air from the nozzles travels across the firebox cre-
ating the air curtain effect, then it reflects off the far side thermal ceramic wall adding oxygen to the
combustion zone helping to generate a hotter more complete fire. This additional agitation helps
prevent the fire from starving for oxygen as the ash builds up during burning operations.
The CharBoss incorporates most of the same design features as the BurnBoss. The CharBoss,
however, includes a hydraulically driven mechanical grid and transport design to facilitate biochar
processing as opposed to optimizing the rapid reduction of woody debris featured by the BurnBoss.
That is accomplished by limiting the residence time of the burning char in the firebox. A shaking
panel agitates the woody waste material as it is being combusted. This forces small chunks of hot
embers to fall onto a continuously moving belt system, which in turn transports the hot glowing
particle chunks to the rear of the machine. They are then released into a collection tray filled with
quenching water.
The biochar as a finished product is periodically collected from the quenching tray. This is a manual
operation on the current T26 model. To conserve water which is a precious commodity in the forest
and agricultural fields, the CharBoss design features a system that conserves water with minor wa-
ter loss from evaporation.
