Simulation of oxy-fuel combustion in cement clinker manufacturing
2015 (English)In: Advances in Cement Research, ISSN 0951-7197, Vol. 27, no 1, 42-49 p.Article in journal (Refereed) Published
A thermodynamic process model is used as an evaluation tool. Full oxy-fuel combustion is evaluated for circulation of 20–80% of flue gases to the burn zone of a rotary kiln. The full oxy-fuel combustion simulations exhibit altered temperature profiles for the process. With 60% recirculation of flue gases, the temperature in the burn zone is comparable to the reference temperature, and carbon dioxide concentration in the flue gases increases from 33 to 76%. If water is excluded, carbon dioxide concentration is 90%. The partial oxy-fuel combustion method is evaluated for 20 and 40% recirculation of flue gases from one cyclone string to both calciners. Fuel and oxygen feed to the burning zone and calciners are optimised for the partial oxy-fuel scenario. The lowest specific energy consumption is desired while maximising the amount of carbon dioxide theoretically possible to capture. By introducing partial oxy-fuel combustion with 20% recirculation of flue gases in the carbon dioxide string, total carbon dioxide emissions increases by 4%, with 84% possible to capture. Within the limits of the model, the introduction of full oxy-fuel and partial oxyfuel combustion is possible while maintaining product quality. When simulating partial oxy-fuel combustion, the energy consumption will increase even when no power consumption for the production of oxygen is included.
Place, publisher, year, edition, pages
Thomas Telford: ICE Publishing , 2015. Vol. 27, no 1, 42-49 p.
cement clinker production, process modell, oxy-fuel combustion
Chemical Process Engineering
IdentifiersURN: urn:nbn:se:umu:diva-86361DOI: 10.1680/adcr.13.00068ISI: 000351286400006OAI: oai:DiVA.org:umu-86361DiVA: diva2:698581