Control Process Stability Analysis of a Solid-Liquid Separation System

A. A Tamunobere; Z. Jaja; J. I. Sodiki

A. A Tamunobere Department of Mechanical Engineering, Rivers State University, Nigeria
Z. Jaja Department of Chemical/Petrochemical Engineering, Rivers State University, Nigeria
J. I. Sodiki Department of Mechanical Engineering, Rivers State University, Nigeria

Keywords: PID Pressure Controller, Multi-phase desander, Simulation, Pressure control, Process stability analysis

Abstract

A key performance indicator in any control process is the sustainability of steady state operation for attainment of stability of the applicable control mechanism. In this work, analysis is carried out on the response of a pressure controller with set pressure of 3bar, 7bar and 12bar and the time stability is attained. Pressure is considered as the operating parameter of the control process using a Differential Pressure Cell (DPC) as the controller mechanism. Using a Proportional Integral Derivative (PID) process controller, the performance of a desander was monitored. At 12 bar set point, the result showed that, with PID values of 0.09518, 0.1438/s, 0s, the operation attained stability in 5.53s in the automatic mode, whereas in the manual mode operation, stability was achieved after 7.96s with PID values of 13, 8/s and 7s manually selected. At 7bar set point, stability was attained in 4.7s with PID values of 1.076, 0.87798/s, 0.19657s in automatic mode whereas in manual mode the system stabilized in 4.79s with PID values of 7, 9/s, 5s. At 3bar set point, the controller gain stability in 5.19s, with PID values of 1.3608, 1.0562, 0.41093s in automatic mode whereas in manual mode, stability was attained in 12.5s with PID values of 12, 8/s, 5s respectively.

References

Azimian, M. & Bart, H. J. (2016). Numerical Analysis of Hydroabrasion in a Hydrocyclone. Petroleum Science, 13, 304-319.
Hisham, B., Van, H. L. & Yuli, L. (2019). Sand Production: A Smart Control Framework for Risk Mitigation. Department of Petroleum Engineering Journal, 66(12), 13-31.
Hongyan, L., Qing, Y., Qingshan, H., Shujun, G., Taobo, H. & Aqiang, C. (2021). Experimental Investigation on Interaction of Vortex Finder Diameter and Length in a Small Hydrocyclone for Solid-Liquid Separation. Separation Science and Technology, 57(5), 733-748.
Marvin, D. C., Jose, M.G., Brittany, N. & Andres, G. M. (2020). CFD Modeling of Desanders: A Study of Efficiency of Hydrodynamic Reservoirs. Fluids, 5(3), 118-120.
Rawlins, C. H. (2002). Application of Multiphase Desander Technology to Oil and Gas Production. Kvaerner Process Systems US, Presented at the 3rd International Conference on Multiphase Technology in Banff, Alberta, 3-5 June.
Rawlins, C. H. (2013). Design of a Cyclonic Solids Jetting Device and Slurry Transport System for Production Systems. Paper 166118 presented at the SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, 30 Sep-02 Oct.
Tamunobere, A. A., Sodiki, J. I., Lebele-Alawa, B. T., & Nkoi, B. (2023). Performance Monitoring of a Multi-Phase Desander with a Flow Control System. European Journal of Science, Innovation and Technology, 3(6), 241-248.
Tamunobere, A.A., & Sodiki, J. I. (2024). Multiphase Desander Performance Monitoring with Pressure Control Mechanism. ISJ Theoretical & Applied Science, 10(138), 1-8.
Zhang, Y., Jiangbo, G., Yang, M., Jiang, L. & Yang, X. (2021). The Influence of Height-to-Width Ratio of Feed Inlet on Flow Field Characteristics and Separation Performance of the Hydrocyclone with Spiral Inlet. International Journal of Coal Preparation and Utilization, 2(7), 1-18.