Heating – Processes of heating or heater operation – Including passing – treating or conveying gas into or through...
Patent
1987-09-28
1989-02-28
Yuen, Henry C.
Heating
Processes of heating or heater operation
Including passing, treating or conveying gas into or through...
432106, 432 78, 110345, F27B 1506
Patent
active
048081086
ABSTRACT:
The heat treatment of fine-grained material wherein two quantities of fuel are delivered to a precalcination zone at two different levels. The first quantity of fuel is delivered at a lower level nearer the combustion zone and the oxygen content of the gases passing through this region of the precalcination zone are such that in this region a substoichiometric combustion takes place and a CO content between 0.05% and 1% is established. As a result a reducing decomposition of the NO.sub.x content of the exhaust gases from the combustion zone takes place.
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Driemeier Gunter
Durr Manfred
Klockenbusch Heinrich
Krutzner Karl
Menzel Karl
Krupp Polysius AG
Yuen Henry C.
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