Analysis of minimum specific energy consumption and optimal transport concentration of slurry pipeline transport systems--颗粒学报PARTICUOLOGY

Li, M., He, Y., Jiang, R., Zhang, J., Zhang, H., Liu, W., & Liu, Y. (2022). Analysis of minimum specific energy consumption and optimal transport concentration of slurry pipeline transport systems. Particuology, 66, 38-47. https://doi.org/10.1016/j.partic.2021.08.004

Analysis of minimum specific energy consumption and optimal transport concentration of slurry pipeline transport systems

Mingzhi Li ^a, Yanping He ^{a b *}, Ruhong Jiang ^{a b}, Ji Zhang^c, Hongsheng Zhang ^d, Weihuang Liu ^a, Yadong Liu ^a

a State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
b Institute of Marine Equipment, Shanghai Jiao Tong University, Shanghai 200240, China
c CHEC Dredging Co., Ltd., Shanghai 200136, China
d National Engineering Research Center of Dredging, Shanghai 200120, China

10.1016/j.partic.2021.08.004

Volume 66, July 2022, Pages 38-47

Received 6 March 2021, Revised 4 June 2021, Accepted 2 August 2021, Available online 1 September 2021, Version of Record 30 October 2021.

E-mail: hyp110@sjtu.edu.cn

Highlights

• Calculation model for the specific power consumption is established.

• Influence of particle parameters on minimum specific power consumption is analysed.

• Optimal transport concentration in different working conditions is calculated.

• Optimal transport concentration of broad-graded slurry is approximately 50%.

Abstract

Slurry pipeline transport is widely used in several industrial processes. Calculating the specific power consumption (SPC) and determining the best working conditions are important for the design and operation of transportation systems. Based on the Shanghai Jiao Tong University high-concentration multi-sized slurry pressure drop (SJTU-HMSPD) pipeline-resistance-calculation model, the SJTU-SPC model for calculating the power required to transport a unit volume of solid materials over a unit pipeline length is established for a slurry transport system. The said system demonstrates a uniformity coefficient in the 1.26–7.98 range, median particle size of 0.075–4 mm, particle volume concentration of 10–60%, and pipeline diameter of 0.203–0.8 m. The results obtained were successfully verified against existing experimental data. The influence of parameters, such as particle-gradation uniformity coefficient, median particle size, pipe diameter, and particle volume concentration, on the SPC were analysed. The results revealed that the greater is the uniformity coefficient, the smaller is the minimum specific energy consumption and the larger the optimal transport concentration for a constant, median particle size slurry. As observed, the optimal transport concentration for broad-graded sand equalled approximately 48%. These results supplement the conclusions of existing research, indicating that the optimal transport concentration is approximately 30% and provides theoretical support for high concentration transportation of broad graded slurry.

Graphical abstract

Keywords

Slurry pipeline transport system; Specific power consumption; Minimum specific energy consumption; Optimal transport concentration

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