H
OW
I
T
W
ORKS
UGD014/0497
GasTrac Process Air Heater
D
ESCRIPTION
2-5
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The Process Air Circuit
The Combustion Air Circuit
The process blower in the host
dryer sends dehumidified air into
the GasTrac heat exchanger.
The heated dry air exits
the GasTrac. The air is
blown by the host dryer
to the drying hopper.
The air is heated to the setpoint temperature
as it passes over and around the burner
cylinder and surrounding baffles.
The combustion blower
pulls ambient air into
the combustion circuit
through a filter. The air
is then blown to the
proportional gas mixer.
1a
2
Gas and air are mixed
in the proportion
needed to achieve the
setpoint temperature.
The GasTrac has two separate air circuits: the combustion air
circuit and the process air circuit.
Gas enters
the fuel train.
1b
The air/gas mixture
enters the burner,
where it is ignited
by a spark.
3
Combustion air flows through the burner
cylinder and the exhaust tube bundles.
4
Combustion
gases exhaust
through a flue.
5
3
1
2