Abstract
A traditional hydrocyclone can only generate two products with different size fractions after one classification, which does not meet the fine classification requirements for narrow size fractions. In order to achieve the fine classification, a multi-product hydrocyclone with double-overflow-pipe structure was designed in this study. In this work, numerical simulation and experimental test methods were used to study the internal flow field characteristics and distribution characteristics of the product size fraction. The simulation results showed that in contrast with the traditional single overflow pipe, there were two turns in the internal axial velocity direction of the hydrocyclone with the double-overflow-pipe structure. Meanwhile, the influence rule of the diameter of the underflow outlet on the flow field characteristics was obtained through numerical simulation. From the test, five products with different size fractions were obtained after one classification and the influence rule of the diameter of the underflow outlet on the size fraction distribution of multi-products was also obtained. This work provides a feasible research idea for obtaining the fine classification of multiple products.
Highlights
A hydrocyclone is a representative device that utilizes the principle of centrifugal sedimentation to effectively separate two-phase or multi-phase liquid-liquid, liquid-solid, and liquid-gas mixtures having components of different densities [1,2]
The results show that proper reduction of the diameter of the underflow outlet is beneficial to obtain the first stage internal overflow product with finer particle size fraction
InInthis study, a two-stage series multi-product hydrocyclone was designed so thatsodifferent particle this study, a two-stage series multi-product hydrocyclone was designed that different size fractions could be obtained as the first stage internal overflow, first stage external overflow, first particle size fractions could be obtained as the first stage internal overflow, first stage external stage underflow, secondunderflow, stage overflow, and second stage underflow after one underflow classification
Summary
A hydrocyclone is a representative device that utilizes the principle of centrifugal sedimentation to effectively separate two-phase or multi-phase liquid-liquid, liquid-solid, and liquid-gas mixtures having components of different densities [1,2]. It has many applications such as separation [3], sorting [4], liquid concentration [5], and liquid clarification [6]. The greatest advantage of the hydrocyclone is that unlike other centrifugal separation devices, no moving components are required. Among the various solid-liquid separation technologies and equipment, the hydrocyclone is currently one of the most widely used equipment in industry. The hydrocyclone is widely used in many industries such as mineral processing [7], petroleum [8], chemical industry [9], coal, mining [10], metallurgy [11], and tailings disposal [12]
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