Depicting the role of gas-solid interactions on the hydrodynamics of converging pneumatic riser

doi:10.1016/j.cjche.2020.11.041

中国化学工程学报 ›› 2022, Vol. 42 ›› Issue (2): 190-195.DOI: 10.1016/j.cjche.2020.11.041

Depicting the role of gas-solid interactions on the hydrodynamics of converging pneumatic riser

Rashmi Dhurandhar¹, Sumit H. Dhawane², Jyoti Prakash Sarkar¹, Bimal Das¹

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

收稿日期:2020-06-30 修回日期:2020-10-29 出版日期:2022-02-28 发布日期:2022-03-30
通讯作者: Rashmi Dhurandhar,E-mail:rd.14che1105@phd.nitdgp.ac.in;Bimal Das,E-mail:bimal.das@che.nitdgp.ac.in
基金资助:
The authors would like to thank the Ministry of Human Resource and Development Government of India for funding this research work. The authors also express their thanks to Gajanand Suryawanshi, for their immense support during the execution of the work.

Depicting the role of gas-solid interactions on the hydrodynamics of converging pneumatic riser

Rashmi Dhurandhar¹, Sumit H. Dhawane², Jyoti Prakash Sarkar¹, Bimal Das¹

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

Received:2020-06-30 Revised:2020-10-29 Online:2022-02-28 Published:2022-03-30
Contact: Rashmi Dhurandhar,E-mail:rd.14che1105@phd.nitdgp.ac.in;Bimal Das,E-mail:bimal.das@che.nitdgp.ac.in
Supported by:
The authors would like to thank the Ministry of Human Resource and Development Government of India for funding this research work. The authors also express their thanks to Gajanand Suryawanshi, for their immense support during the execution of the work.

摘要/Abstract

摘要： 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 experiments were conducted in a converging riser having a convergence angle of 0.2693°. Various solid particles 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 ΔP_T 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.

关键词: Pneumatic conveying, Pressure drop, Converging riser, Gas-solid dynamics

Abstract: 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 experiments were conducted in a converging riser having a convergence angle of 0.2693°. Various solid particles 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 ΔP_T 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.

Key words: Pneumatic conveying, Pressure drop, Converging riser, Gas-solid dynamics

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, 2022, 42(2): 190-195.

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]. Chinese Journal of Chemical Engineering, 2022, 42(2): 190-195.

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Depicting the role of gas-solid interactions on the hydrodynamics of converging pneumatic riser

Depicting the role of gas-solid interactions on the hydrodynamics of converging pneumatic riser

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