Prediction of minimum and complete fluidization velocity and transport disengaging height of the segregated coal in a cold flow fluidized bed

Abstract

The low-grade coal has been taken in the 40 mm ID acrylic fluidized bed column to examine the minimum fluidization velocity (U_mf), complete fluidization velocity (U_cf), and transport disengaging height (TDH) of different size groups of fine coal. The results reveal that the U_mf and U_cf increase as the particle diameter increases, but the TDH has the opposite trend. U_cf is found to be two to three times of U_mf for all particle sizes. New correlations for the prediction of U_mf and TDH in terms of Reynolds number and Archimedes number for coal fines have been established based on the experimental study. The developed correlations have shown strong agreement with experimental values, with variances for all samples falling within a ± 10% range.

Keywords:

• Coal
• minimum fluidization velocity
• complete fluidization velocity
• bed voidage
• TDH

Additional information

Notes on contributors

Gautam Prasad Dewangan

Gautam Prasad Dewangan did his BE in Chemical Engineering (2007) from Guru Ghasidas University, and MTech (2011) from NIT, Warangal. He has had one year industrial, one year research experience, has worked as lecturer for one year in NIT, Warangal and since 2012 he has been working as Assistant Professor in Guru Ghasidas Vishawavidyalaya Bilaspur. He has eight journal publication in his credit

Samarendra Nath Saha

Samarendra Nath Saha did his BChE (1978) and MChE (1980) from Jadavpur University, PhD (1992) from BITS Pilani. After having 2&1/2 years industrial and 1&1/2 years research experience, joined BITS Pilani as faculty member in 1983 and after 13 years teaching as Lecturer and Assistant Professor, joined as Professor of Punjab Government Engineering College in 1996, and worked as Principal. He joined as Professor of Guru Ghasidas University in 2003 and worked as Director and Dean of this University Institute of Technology. He has had 83 papers and 4 text books publication in his credit.