Method and apparatus for reducing the NOx emissions in a rotary kiln

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United States of America Patent

PATENT NO 10914522
APP PUB NO 20180252473A1
SERIAL NO

15758191

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Abstract

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In a method for reducing the NOx emissions of a rotary kiln of a clinker production plant, fuel supplied through a burner of the rotary kiln is burned along with primary air fed through the burner, wherein the primary air has a lower oxygen content and the primary air has an oxygen content reduced relative to that of the ambient air and a temperature increased relative to that of the ambient air, and the primary air is obtained by mixing ambient air with exhaust gas from the rotary kiln or from a heat exchanger connected to the rotary kiln and used for preheating raw meal. The primary air is further obtained by mixing with hot air, in particular waste air from a clinker cooler.

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Patent Owner(s)

Patent OwnerAddress
HOLCIM TECHNOLOGY LTD6300 ZUG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gafner, Irwin Rolle, CH 1 0

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