Drying Characteristics and Kinetics Behavior of Indian Coal Slurries Using Natural Draft Tray Dryer

ABSTRACT

In this work, drying characteristics and kinetic behavior of coal slurry were investigated. The drying tests were performed using natural draught tray dryer for power industry. The impacts of drying temperature (35°C to 90°C) and sample mass (5 g to 25 g) on moonidih and patherdih coal slurry samples were investigated. The results revealed that increasing the temperature from 35°C to 90°C raised the maximum drying rate from 11.20 to 38.72 g/s.min² in 1.5 hr representing a 70% rise in the drying rate. As a result, the drying temperature and sample mass had a considerable influence on the drying process. The drying time was lowered and the drying rate was improved by raising the drying temperature. The Midilli-Kucuk model suited these drying data the best, suggesting that moisture transport in coal slurry samples was mostly regulated by internal diffusion.

GRAPHICAL ABSTRACT

KEYWORDS:

• Drying characteristics
• coal slurry
• moisture
• natural draft tray dryer
• drying temperature

Acknowledgments

The authors are thankful to the Prof. Rajiv Shekhar, Director, IIT (ISM) Dhanbad for giving the opportunity and support for completion of research work successfully. Authors are also thankful to Prof. Atul Kumar Verma, IIT (ISM) Dhanbad for his valuable suggestions. for petrographic analysis.

Disclosure statement

No potential conflict of interest was reported by the author(s).