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THE PRINCIPLE OF AIR CURTAIN INCINERATION
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S-327 - Full Operation |
OPERATION
The operating principle of the air curtain within an incineration
device lies in the introduction of controlled high velocity air across
the upper portion of the combustion chamber in which clean wood waste
is loaded. The powerful curtain of air created in this process traps unburned
particles under the curtain in the high temperature zone where temperatures
can reach 1,832º F (1,000º C).
The increased combustion time
and turbulence results in a re-burn of the trapped particles or smoke. The escaping particulates are reduced to near their base
elements. The resulting emissions from a properly operating air
curtain burner will have an opacity rate below 10 percent during most
steady state operations.
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S-220
- Full Operation |
For proper operation, the
air curtain machine has to be designed to provide a curtain of air over
the fire that has a mass flow and velocity that are in balance with the
potential mass flow and velocity of the burning wood waste. If the
curtain velocity is too high the box or trench can become over pressurized
and over agitated. The higher pressure will lift the curtain and
cause it to become ineffective. The over agitation will cause embers
and ash to be blown out of the box or pit past the ineffective curtain.
If the mass flow of the curtain is too low then the unburned particles
(smoke) will penetrate the curtain on the high velocity of the hot gasses
being generated from the burning wood.
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"The Wood Waste Is The Fuel"
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1
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Air
curtain machine manifold and nozzles directing high velocity air
flow into refractory lined fire box or earthen trench.
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2
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Refractory
lined wall as on the S-Series machines, or earthen wall as used
with the T-Series trench burners.
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3
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Material
to be burned.
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4
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Initial
airflow forms a high velocity “curtain” over fire.
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5
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Continued
air flow over-oxygenates fire keeping temperatures high. Higher
temperatures provide a cleaner and more complete burn.
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APPLICATION
The ash from typical wood waste is
a very useful soil additive, and as such offers a commodity that can be
marketed to plant nurseries, farms, etc. as a potting soil additive.
This beneficial reuse aspect of the residual ash may be important to the
overall profitability of the Air Burners System in certain applications.
Recycling our resources is not only socially and politically imperative,
but it often reaps the additional benefit of tax incentives or tax credits.
Solid waste landfills are diminishing rapidly, and permits are difficult
to secure for new sites. The Air Burners System provides an affordable
and environmentally sound alternative to indiscriminate depositing of
wood debris into landfills.
In the past, diseased animal carcasses
were usually buried and forgotten. Little was known about the agents
that caused the deadly diseases that have wiped out many herds of cattle
and entire chicken farms. What is important to understand is that
certain pathogens have been known to survive more than fifty years in
the soil where they have been buried along with animal carcasses that
perished from the disease. The only known practical approach to the elimination
of diseased carcasses is high temperature incineration. Air Burners Air
Curtain Systems are ideally suited for this task and have repeatedly been
employed for that purpose with the approval of the US, Canadian and other
foreign governments.
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