The understanding of the flow characteristics and effect of gas-solid interactions in pneumatic risers is fundamental to investigate to ensure effective design cost-effective operation.Thus,to understand the effect of gas-solid interactions on the hydrodynamics of newly proposed conversing risers,this study mainly focused on predicting pressure drop in the dilute phase pneumatic conveying system.The exper-iments were conducted in a converging riser having a convergence angle of 0.2693°.Various solid parti-cles such as sago,black mustard,and alumina have been considered to study the effect of particle sizes and density on the pressure drop.The experimental outcomes indicate that the total pressure drop increases with an increase in the solid density and gas mass flow rate.Moreover,smaller particle sizes are also increased the pressure drop.An empirical correlation is developed for the prediction of total pressure drop ΔPT in converging pneumatic riser via dimensional analysis.All dependent variables such as particle and air density,drag force,acceleration due to gravity,the mass flow rate of air and particle,the diameter of particle and converging riser,the height of converging riser were considered to develop the empirical correlation.The established relationship is tested,and experimental data have been fitted for its validation.The estimated relative error of less than 0.05 proved the significance of the developed correlation.Hence,it can be stated that the established relationship is useful in studying the effects of various parameters on the pressure drop across the length of the conversing riser.

Rashmi Dhurandhar;Sumit H.Dhawane;Jyoti Prakash Sarkar;Bimal Das

Department of Chemical Engineering,National Institute of Technology,Durgapur 713209,West Bengal,India;Department of Chemical Engineering,Maulana Azad National Institute of Technology,Bhopal 462003,Madhya Pradesh,India

中国化学工程学报（英文版）

[1]Rashmi Dhurandhar;Sumit H.Dhawane;Jyoti Prakash Sarkar;Bimal Das-.Depicting the role of gas-solid interactions on the hydrodynamics of converging pneumatic riser)[J].中国化学工程学报（英文版）,2022(02):190-195

Depicting,conversing,sago

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