Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Control performance improvement of light cut naphtha extraction via model-free adaptive filter
Submission Author:
Lucas Moura Gomes , DF
Co-Authors:
Lucas Moura Gomes, Luis Longhi, José Oniram de Aquino Limaverde Filho, Eugenio Fortaleza
Presenter: Lucas Moura Gomes
doi://10.26678/ABCM.COBEM2023.COB2023-2225
Abstract
Hydrotreated naphtha is a complex hydrocarbon used to produce gasoline and it is composed of heavy and light naphtha based on sulfur content. The heavy cut must go through hydrodesulfurization (HDS), while the light cut meets the sulfur requirements of gasoline and should be extracted to decrease load on HDS reactors. Prior to this study, a filter derived by the authors was introduced in several feedback control loops of an industrial oil refinery plant with a 30,000 m³/d average throughput of oil, whose results were promising in terms of reducing actuator wear while keeping an equivalent output performance as compared to the unfiltered case. In the present work, we propose to slightly modify the filter tuning process to further reduce the impact of measurement noise without compromising the controller action of a closed-loop control system used in light naphtha extraction. Data were collected from 16 days before and 15 days after the addition of the filter in the feedback control loop. Control performance indexes were then computed to assess the robustness and effectiveness of the proposed approach. The inclusion of the filter led to a reduction of approximately 20% in the average Integral Absolute Error (IAE), showing considerable improvement in reference tracking of the output. Furthermore, actuator Travel in percentage was reduced by 60%, indicating less stress on the actuator and fewer reversions. The experimental findings achieved with a slight modification of the tuning parameters of this filter show that its usage can be expanded with minimal implementation effort to improve output performance of industrial control plants and reduce the excessive use of the actuator over time. These results encouraged the process engineers to carry on the application of the filter in the same control loop, as well as research other possibilities inside the industrial oil refinery plant.
Keywords
Industrial Plant, adaptive filter, model-free method, process control, exponential moving average
