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

Tingrui Liu,Zengyin Wang,Peikun Liu,Ziqing Yu

doi:10.2174/1874155x01509010117

Abstract

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.

Highlights

During the existing cyclone separation production process, liquid level fluctuation of pump pool has great influence on separation efficiency [1]
The entrance of cyclone is provided with a pressure sensor, and the pressure controlled by the Programmable Logic Controller (PLC) control system
To testify the validity of the control methodology of optimal fuzzy_PI PID, fresh water testing sample is considered, the operating pressures are set at 0.10 MPa, 0.13 MPa, 0.15 MPa, and 0.18 MPa, respectively

Summary

INTRODUCTION

During the existing cyclone separation production process, liquid level fluctuation of pump pool (agitating vessel) has great influence on separation efficiency [1]. If the pulp level is too high, it is easy to cause the slurry overflow loss. When the hydraulic pressure of hydrocyclone is lower than the stable value, very fine slurry cannot be separated and it will cause a pulp overflow. It is more crucial in multi-product cyclone system to ensure the height of the liquid level of agitating vessel is established [2,3,4,5,6]. When the pressure is stabilized, from the underflow and overflow, synchronous sampling is performed

Preliminary Estimation and Identification of System Model

Validity of Control Methodology

Influence of Pressure on Split Ratio

Influence of Pressure on Separation Performance of Iron Tailings Materials

CONCLUSION