Modeling of Airlift Pumping System for Deep-Sea Mining and Key Parameters Analysis
In order to predict the performance of the airlift pumping system for deep-sea mining accurately,and determine key parameters,a three-phase flow theoretical model inside the lifting pipeline is established based on the momentum theorem.In this model,the gas expansion,change of gas volumetric fraction,and mineral particle settlement are comprehensively considered.Through numerical calculation,the relationship between gas injection volume,liquid discharge volume and solid discharge volume is revealed,and the model is verified by comparison with experimental data in literature.Using this theoretical model,the performance prediction of the 5 500 m airlift pumping system is carried out and the key parameters including pipe diameter,injection depth and mineral particle size are analyzed.The results can provide an important guidance for the design of deep-sea mining airlift pumping system.
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