—The focus of this work is utilization of waste heat
in a cement kiln flue gas in an amine-based CO2
process. The high temperature flue gas from the cement kiln is
used to generate steam in a waste heat boiler. The steam is then
used to replace some of the steam required in the stripping
section of the CO2
capture plant. The required surface area for
heat exchange, the cost of installing this area and the payback
time of the installation is calculated. The flue gas capture model
was developed using the Aspen Plus simulation software. The
available excess heat in the cement manufacturing process is
calculated to 18 MW for the base case considered. The heat
transfer area is calculated as 3115m2
. The total cost of the heat
exchanger was $ 3.9 million, and the payback time is about 1
year, demonstrating the economic feasibility of applying heat
integration when implementing an amine-based CO2
process in a cement kiln system.
—Carbon dioxide capture, waste heat boiler,
flue gas, MEA, cement industry.
The authors are with the Telemark University College, Porsgrunn,
Norway (e-mail: email@example.com, firstname.lastname@example.org,
Cite: Udara S. P. R. Arachchige, Dinesh Kawan, Lars-André Tokheim, and Morten C. Melaaen, "Waste Heat Utilization for CO2 Capture in the Cement
Industry," International Journal of Modeling and Optimization vol. 4, no. 6, pp. 432-442, 2014.