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Design of a Rotary Drying Machine for Biomass as an Alternative Fuel in Cement Production

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Abstract:

One of the cement companies in Indonesia has implemented biomass as an alternative fuel in kiln operations. However, the high moisture content of biomass, typically around 30%, often reduces combustion efficiency. This research presents the design of a rotary dryer to reduce biomass moisture content to approximately 10%. The proposed system has a processing capacity of 500 kg/h with main specifications including a drum diameter of 1.26 m, length of 7.56 m, inclination angle of 2.29°, rotational speed of 6 rpm, and a material residence time of around 30 minutes. The total power requirement is estimated at 15 kW with hot air supplied at 150 °C. Heat balance calculations indicated a minimal deviation of 0.00057%, confirming the accuracy of the design. Thermal simulations demonstrated uniform temperature distribution throughout the drum, ensuring effective drying. From an economic perspective, the system provides significant daily operational benefits by reducing coal consumption. The proposed design is therefore technically feasible, economically viable, and environmentally beneficial, supporting the substitution of fossil fuels and the reduction of CO2 emissions in cement manufacturing.

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Periodical:

Engineering Headway (Volume 38)

Pages:

171-180

DOI:

https://doi.org/10.4028/p-WXwar0

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Online since:

June 2026

Authors:

Muslimin Muslimin*, Ahmad Fahrudin, Dedy Hendra Jati, Muhammad Prasha Risfi Silitonga, Sugeng Mulyono, Ahmad Fathoni, Djoko Nursanto

Keywords:

Alternative Energy, Alternative Fuel, Biomass Dryer, Cement Industry, Rotary Dryer

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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