Study of Geometric Modification of Calciner in Cement Plant
Abstrak
In a cement plant, suspension preheater is used to raise temperature of a raw mix so that the mixing process results in a high degree of calcination. In this research project, we attempt to increase degree of calcination to reduce the load in the kiln by including the calciner suspension pre-heater. This project focus on a suspension preheater system with a separate line calciner at cement plant with capacity of 5000 ton per day. Then the calciner will be modified its length. Computational fluid dynamics method was chosen to simulate the performance of the calciner. The results show that the modified calciner can increases the degree of calcination and improves the heat transfer rate. This lead to the decrease of temperature output of the top cyclone and thus reducing the heat consumption. Which such efficiency, the modification design opens possibility to increase the production capacity while maintaining the outlet temperature of the top cyclone.
Referensi
Affairs, C. M. F. E., Masterplan for Acceleration and Expansion of Indonesia Economic Development, http://www.gbgindonesia.com, (18 April 2020)
Duda, W. H. & Book C. D., International Process Engineering in the cement industry, 1st edition, Cement-Data-Book, pp 1157-1176, 1985.
Madlool, N. A., Saidur, R., Hossain, M. S. & Rahim N. A., A critical review on energy use and savings in the cement industries, Renewable and Sustainable Energy Reviews, 15(4), pp. 2042-2060, 2011.
Atmaca, A. & Yumrutaş, R, Thermodynamic and exergoeconomic analysis of a cement plant: Part II–Application, Energy Conversion and management, 79, pp. 799-808, 2014.
Fidaros, D., Baxevanou, C., Dritselis, C. & Vlachos, N., Numerical modelling of flow and transport processes in a calciner for cement production, Powder Technology, 171(2), pp. 81-95, 2007.
Mujumdar, K. S., Ganesh, K., Kulkarni, S. B. & Ranade, V. V., Rotary Cement Kiln Simulator (RoCKS): Integrated modeling of pre-heater, calciner, kiln and clinker cooler, Chemical Engineering Science, 62(9), pp. 2590-2607, 2007.
Mikulčić, H., Von Berg, E., Vujanović, M., Priesching, P., Tatschl, R. & Duić, N., CFD analysis of a cement calciner for a cleaner cement production, Chemical Engineering Transactions, 29, pp.1513-1518, 2012.
Tsamatsoulis, D., Simplified Modeling of Cement Kiln Precalciner, 20th International Conference on Circuits, Systems, Communications and Computers (CSCC'16), 2016.
Zhang, Y., Cao, S. X., Shao, S., Chen, Y., Liu, S. L. & Zhang, S. S., Aspen Plus-based simulation of a cement calciner and optimization analysis of air pollutants emission, Clean Technologies and Environmental Policy, 13(3), pp. 459-468, 2011.
Mikulčić, H., Vujanović, M., Fidaros, D. K., Priesching, P., Minić, I., Tatschl, R., Duić, N. & Stefanović, G., The application of CFD modelling to support the reduction of CO2 emissions in cement industry, Energy, 45(1), pp. 464-473,2012.
Wilcox, D.C., Turbulence Modeling for CFD, DCW Industries, Inc., La Canada, California. 1998.
