Effect of air agitation on the flow phenomena of draft tube precipitator
Industry scale draft tube precipitators (Agglomerators and Growth tanks), especially the taller aspect ratio (H/T ≥ 2) precipitator in alumina Bayer process have the task to uniformly suspend alumina hydrate particles with minimum power consumption.It is important to note that the overflow particle concentration will be uniform if particles are uniformly suspended in the entire precipitator volume else gradients in particle concentration may prevail in alumina precipitators.In industrial operational practice, it is supposed that the injected air from the bottom of the draft tube precipitator assists and enhances the hydrate particle suspension.In the present work, investigation has been made to analyze the flow phenomena in the taller aspect ratio design with and without air agitation.Also, the work depicts the role of draft tube slots on the overall flow pattern and hydrate particle suspension.In order to analyze and characterize the flow phenomena, computational fluid dynamics (CFD) modeling study has been used to investigate the flow and hydrate suspension behaviour.
Alumina precipitator CFD multiphase mixing draft tube
Kumaresan T. Kiran Bhor Shirish Thakre Narinder Walia Ashish Mishra Sankaranarayanan S. Sadguru Kulkarni
Aditya Birla Science and Technology Company Limited, Navi Mumbai, India Hindalco Industries Limited, Muri, India Hindalco Innovation Centre, Hindalco Industries Limited, Belgaum, India Hindalco Industries Limited, Mumbai, India
国际会议
32th International Conference & Exhibition ICSOBA-2014(第32届国际铝土矿、氧化铝和铝工业技术学术年会)
郑州
英文
222-234
2014-10-12（万方平台首次上网日期，不代表论文的发表时间）