Method for calcination of a material with low nochi emissions
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsErwin Penfornis, Maguelonne Hammel, Pascal Duperray, Xavier Paubel
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Abstract
The invention relates to a method for calcination of a material in which said material is heated by contact with a heat source essentially generated by means of a flame produced with at least one flow of fuel and primary air and a flow of secondary air, the flame comprising a first combustion zone with a temperature below 1500° C. and a second combustion zone with a temperature above 1500° C., where at least one flow of at least one inert gas is injected into the flame at the beginning of the second combustion zone and/or at least one flow of oxygen or a gas enriched in oxygen is injected into the second combustion zone.
Claims16
A method of calcining a material, in which said material is heated in contact with a heat source essentially created by a flame generated by at least one flow of fuel and primary air and a flow of secondary air, the flame comprising a first combustion zone with a temperature below 1500° C. and a second combustion zone with a temperature above 1500° C., characterized in that:
- at least one flow of at least one inert gas is injected into the flame at the point where the second combustion zone starts;
- and/or
- at least one flow of oxygen or an oxygen-enriched gas is injected into the second combustion zone.
Dependencies are inferred from the claim text.