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WP7 Oxyfuel burner technology

In order to ensure a high cement clinker quality, a proper clinker formation (which strongly depends on the temperature profiles in the kiln) has to be ensured, requiring burner adaptations. This work package focuses on the design and optimization of an oxyfuel burner prototype for cement kilns with carbon capture purposes. Four institutions participate in the investigations, including the burner manufacturer ThyssenKrupp Industrial Solutions as well as the research institutions SINTEF-ER, VDZ and IFK-University of Stuttgart.

Particularities of the cement production, including the formation of cement clinker phases inside the cement kiln, require a burner design and resulting temperature profile which considers clinker quality preservation. A downscaled prototype of a cement kiln burner will be designed and tested under relevant oxyfuel industrial conditions at a 500 kW combustion rig. Detailed flame and emission measurements as well as investigations of the influence of diverse process parameters will be undertaken to assess adequate oxyfuel configurations considering safe operation and product quality.

Additional activities include the adaptation of CFD combustion models for the simulation of oxyfuel combustion in cement kilns. These models will be validated against experimental results obtained with the prototype burner and then used for an up-scaling of this technology in large industrial scale facilities.

Burner sketch and operating principle (Illustration: ThyssenKrupp Industrial Solutions),