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Helpful Hints: What
Air Curtain Burner Model Should I Use?
Standard Trench Burner Features
(pdf File)
Trench Burner
Flier (2 Pages)
VIDEO Trench
Burner Set-up and Tear-down (58 MB Windows Media Player)
Same 15 MB Flash
Same 28 MB QuickTime
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T-300 Trench Burners
General
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T-400 Trench Burner
at Perfect 40-Foot Pit |
Air Burners' T-Series trailer
mounted air curtain incineration systems have been designed and
engineered to provide over-the-road transportability, offering the
operator the flexibility of reducing land clearing or clean
construction
waste on-site as opposed to hauling the waste to a fixed processing
or dumping location or chipping it at high cost and possibly hauling
it as well.
We presently manufacture one standard trench burner model, new for 2009, the T-300
equipped with
a
manifold length of 30 feet, replacing the T-200 (20 foot manifold)
and the T-400 (40 foot manifold). The T-300 features a unique safety
set-back distance from burn pit to trailer unit of 20 feet. See
also:
Standard Trench Burner Features.
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T-300 Trench
Burner |
The T-Series unit is a
fully self-contained trailer mounted system that includes a power
plant, mechanical drive system, blower fan and fuel tank. The unit
has a manifold (in lengths of 30 feet or 9 meters) that
delivers the “air curtain” for trench burning. Air Burners produced
a large number of its “traditional” T-350 (T-359) trench burner for more than 25
years that requires on-site assembly of the carrier pipe and
manifold components. It has now been replaced with the patented
T-300 machine and production of the T-350 has been
discontinued. However, the T-350 is still available as
custom equipment, both as trailer-mounted and skid-mounted units,
and we continue to provide, of course, spare parts for this model.
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T-300 Trench Burner
in Operation |
As depicted in the
accompanying pictures and drawings the trailer mounted series of air
curtain incinerators are set-up on-site. All components are mounted
to the T-300. Set-up and operation of the T-Series units is
quick and easy (video).
The trench is constructed
using a backhoe, excavator or similar equipment. The earthen trench
is constructed by either excavating down into the soil or by pilling
up soil to achieve a trench that is the length of the manifold:
10 feet (3 meters) wide for the T-300 unit. The trench depth should be equal to the width. Trench Burners do not operate well in soil not conducive to digging
the trench, as with very sandy or with very rocky soil.
Additionally, a low water table may prevent the construction of a
proper trench. Where these conditions exist, one of our
above ground fireboxes should best be
used.
Burning operations can usually
run for three days before the ash in the trench will need to be
removed or buried. The trench can be reused as long as the
earthen sides of the trench remain straight. Once they start
to deteriorate emissions will begin to increase and thru-put will
go down therefore it is best to move on to a new trench.
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T-300
Trench Burner |
The principle of the air
curtain concept is optimized with this Air Burners design. High
velocity air is directed across and downwards at an angle into the
pit creating the air curtain on top and a rotational turbulence
within the pit itself. The rotational turbulence provides an oxygen
enriched environment within the combustion zone which accelerates
the combustion process by raising the temperatures within the pit to approximately 1,832º F (approx. 1,000º C).
The high velocity air
curtain traps unburned particulate until it is completely consumed.
The end result achieves nearly 100% combustion with minimal escaped
particulate matter (PM - mostly smoke) and opacities below 10%.
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Air
Burners' Discontinued T-350 Trench Burner, Now a Special Order Item
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The volume of material
that can be processed per hour is a function of density of the waste
material, its moisture content, the employed loading techniques and
the time period in which optimum temperatures in the pit can be
retained (see the detailed specs for averages). Upon completion of
the combustion stage, the waste material will be reduced on the
average by 98% leaving only 2% of the original volume as residual
ash. System efficiency will be reduced once the residual ash
build-up reaches approximately 3 ft (91 cm) in the bottom of the
pit. Typically, several days of operation will lead to such a
build-up after which the ash will have to be removed or buried.
In most applications the
residual ash from wood waste can either be retrieved and sold to
nurseries as a soil amendment, or it can be mixed with the soil
right at the location, as the material is non-polluting and becomes
a generally desirable soil enhancer.
Patented T-300 Trench Burner
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T-200
(Front) and T-400 Trench Burner
(Manifold/Carrier Pipes Retracted) |
Our T-300
trench burners does not have a carrier pipe or manifold to assemble,
as does the previous model, the T-350. The
manifold and carrier pipe assemblies “extend” from the rear of
the trailer.
This new “patented” system design will reduce your set
up and teardown time while providing better control of the air being
delivered for the air curtain. It will also maintain the all
important 20-foot “set back” from pit to machine to protect your equipment. In addition we
are employing an entirely new air generating system.
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T-200
Trench Burner (Manifold/Carrier Pipe Extended
(Not Positioned at Trench; note the 20 ft safety setback) |
These and other
developments enhance operations, reduce emissions and increase
thru-put. The T-200 and T-400
were first introduced in Summer 2002 and both the T-200 and T-400 replaced with the T-300
in late 2008 for the 2009 model year.
Trailer Construction
The trailers are welded
steel construction using ¼” thick by six inch C-channel for the
main frames and cross members. The frames are completely welded-out
not “tack welded” as often seen by other trailer manufacturers. This type
of construction gives you the strongest possible foundation to support
axles, motors and drive equipment in the tough environment found
on most job sites. It also gives you confidence that when
you arrive at the job site, so will your trailer.
All of the tube ends are
cap welded for better protection from the elements and a better
looking finish. All welds are continuous fillet welds
for overall strength. The entire unit receives two coats of primer
and three coats of the symbolic "Air Burners Green"
gloss enamel paint for optimum protection.
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T-300 Trench Burner
- Superb Suspension Allows Towing at Interstate Highway Speeds |
All of our trailers are
tandem axle construction. Tandem axles give you the most security
for getting on and off the job sites. The tandem axle trailer
includes electric brakes on both axles. We supply our trailers
with heavy-duty Load Range D, nylon belted tires rated at over 2,500
lbs. (1,100 kg) each. The axles are torsion axles to give
you high ground clearance and excellent support for travel over uneven terrain in the field or running at high speeds
on
the highway. The lighting package
includes license plate, side-marker, brake and tail lights.
Air Supply
The trailer mounted fan
is mechanically driven by a pulley and belt system. We use a dual-belt system
with a heavy-duty automatic belt tensioner which is easy to maintain and very reliable. The fan
is a custom designed industrial unit built specifically for the
Air Burners T-Series machines. It is a high-pressure fan in
contrast to the conventional low pressure version as is still found
on less efficient trench burners which would include our own now
obsolete T-350. The new high pressure fan makes it possible to
reduce the engine horsepower required resulting in substantial fuel
savings, and it allows the design of a much smaller carrier pipe and
manifold. That, in turn, makes it possible to build a trench burner
with retractable manifold assemblies, such as our patented T-300 and
T-400 machines that can be set up by one person in a few minutes.
The fan is mounted so as
to direct the compressed high velocity air down the carrier pipe to the manifold
that re-directs the air over and down into the pit.
The manifold is a welded steel construction equipped with patented
scuffers that peel off the required amount of air down the manifold
so as to maintain a uniform discharge rate along the entire length
of the trench. Vanes in the discharge nozzle produce discharge ports
with high exit velocities.
Power and Drive Systems
The Power Plant used on
the T-Series Air Curtain Systems is a four cylinder Diesel
engine. The engine is a direct-injected,
naturally aspirated Turbo Charged engine with a minimum rating of 56 HP
(Perkins for T-300) to 88 HP (Kubota for T-400). The engine is outfitted with
a custom designed instrument and control panel that provides ease
of operation and readily visible monitoring. A PTO is mounted to
the engine, providing the drive control for the fan mechanical drive
system. The engine and drive gear are protected by a custom manufactured
flame retardant fiberglass cowling that is lockable. Dual fuel tanks (45 gallons (170 liters)
are mounted on
the trailer under the cowling. This provides more than one full day of operating
capability before refueling is required.
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