Gas burner control
KS 98 application
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Description
To achieve stoichiometric combustion of
gas, it is necessary to operate the burner
with sufficient excess air. Together with
a thorough turbulence of the gas/air mixture,
it also ensures a low CO content in
the waste gas. For this, the excess air
factor „lambda“ is usually maintained at
1,2. Moreover, to make certain that sufficient
excess air is available under all operating
conditions (disturbance of the
control valves, pressure drop in the supply,
etc.) the air demand is always maximized.
One set-value for the air flow controller is
provided by the temperature master controller.
Another requirement is governed
by the instantaneous gas flow. Consequently,
the gas flow is reduced automatically
in case of a disturbance in the air
supply, thus maintaining the necessary
lambda value.
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