The Influence of Inlet Pressure Control on Separation Performance of Multi-Product Cyclones

Tingrui Liu*, Peikun Liu, Zengyin Wang, Ziqing Yu
College of Mechanical & Electronic Engineering, Shandong University of Science & Technology, Qingdao, China

© 2015 Liu et al

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the College of Mechanical & Electronic Engineering, Shandong University of Science & Technology, No. 579, Qianwangang Road, Qingdao, Postcard: 266590, China; Tel: 15689977136; E-mail:


This paper is devoted and intended to solve the problems in determining the precise separation efficiency and accurate prediction for the solid yield of multi-product cyclones based on existing experimental data. The influence of inlet pressure control on separation performance of multi-product cyclones is investigated. Hydrocyclone separation performance is influenced by many factors such as the liquid level of agitating vessel and the entrance pressure. The liquid level can also be controlled through the entrance pressure control. The mathematical model of multi-product cyclone system is a high-order complex model and it is difficult to determine the specific expressions. The paper adopts a special optimal fuzzy PI_PID control strategy performed by Programmable Logic Controller system to enable inlet pressure control. By the force of contrast with experiment and analysis for many performance indexes, the effectiveness and applicability of the control approach are demonstrated. The research provides a method for control of high-order complex system of hydrocyclone separation.

Keywords: Inlet pressure, Multi-product cyclones, Optimal fuzzy PI_PID control strategy, Programmable logic controllersystem, Separation performance.