Method for dry desulfurizing flue gases
AssigneeHeidelberger Zement AG
InventorsJochen Ziegler, Helmut S. Erhard
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Abstract
The present invention relates to a method for dry desulfurizing flue gases from rotary cement kilns, for which additives suitable for binding SO.sub.2, such as quick lime and/or dry calcium hydroxide, are supplied to the kiln, the additive being introduced into a flue gas-carrying zone at the kiln head at a injection angle of 2.degree. to 12.degree. to the axis of the kiln and at an injection velocity of 20 to 80 m/sec.
Claims8
A method for dry desulfurizing flue gases from rotary cement kilns for the production of cement clinkers by adding to the kiln additives selected from the group consisting of quick lime, dry calcium hydroxide and a combination thereof for binding SO.sub.2 comprising adding the additive into a flame region of a flue gas-carrying zone with a temperature of at least 1500.degree. C. at the kiln head at an injection angle of 2.degree. to 12.degree. to the axis of the kiln and at an injection velocity of 20 to 80 m/sec.
Dependencies are inferred from the claim text.