
600 Oxygen-Enhanced Combustion
gradient between the hot clinker and the gas would
be greater than in a conventional cooler, owing to the
higher heat capacity. The steeper gradient would be
expected to enhance heat transfer.
Clinker coolers also exhaust vent air to the atmo-
sphere, potentially 30% of the cooling air. Venting is
necessary as the amount of cooling air required for the
clinker exceeds the amount of combustion air required
for the kiln. The amount of vent air is affected by the ef-
ciency of the kiln and the amount of primary air, which
is not derived from the clinker cooler. The isolation of
the kiln precludes any venting to the atmosphere ...