Heat Recovery from the Incineration of Polychlorinated Biphenyls Waste in Rotary Kilns

ABSTRACT

Safe disposal of some hazardous substances requires incineration at elevated temperatures. High temperature incineration prevents the formation of another type of hazardous substance in gaseous phase. This work focuses on the utilization of the energy stored in the gaseous effluents from the rotary kiln incinerators when combusting the polychlorinated biphenyls (PCBs) hazardous wastes. The incineration process with a heat recovery unit and a steam power plant as one unit is simulated using MATHCAD software. Results show that by using two heat exchanger units, shell-and-tube and cross-flow heat exchanger, the overall efficiency of the steam power plant is improved by 10%. A significant fuel savings value is also reported.

Keywords::

• Heat exchanger
• heat recovery
• incineration
• PCBs
• rotary kiln

Additional information

Notes on contributors

Ehab Hussein Bani-Hani

Ehab Hussein Bani-Hani, Ph.D., is an assistant professor at the Australian College of Kuwait (ACK). He has 15 year's experiences in combustion and environmental management, water and waste water treatment. Dr. Ehab received his Ph.D. in mechanical engineering at the University of Jordon and Master's degree in chemical engineering at the Jordan University of Science and Technology. He currently researches energy and renewable energy systems. He may be contacted at [email protected] or at [email protected].

Ahmad Sedaghat

ABOUT THE AUTHORS

Ahmad Sedaghat, Ph.D., is an associate professor at Australian College of Kuwait (ACK). He has 25 years experience in computational and experimental techniques in mechanical, aerospace and maritime engineering. He has developed courses and supervised engineering students in thermo-fluid and aerospace subjects and obtained industrial funds in renewable energies of wind, solar, wave, and geothermal. Dr. Sedaghat obtained his Ph.D. in Aerospace Engineering and M.Sc. in Applied Mathematics & Fluid Mechanics at the University of Manchester in the United Kingdom. He is a Fellow Member of Engineers Australia and Adjunct Professor of CQU. He may be contacted at [email protected].

Zabihollah Najafian Ashrafi

Zabihollah Najafian Ashrafi received his Bachelor of Science degree in mechanical engineering from Isfahan University of Technology and his Master of Science degree in mechanical engineering from University of Tehran. His interests include thermo-fluid and renewable energy. He may be contacted at [email protected].