Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Investigation of a magnetic anti-scaling device for fouling mitigation in valves
Submission Author:
Caroline de Oliveira Goncalves , RJ
Co-Authors:
Caroline de Oliveira Goncalves, Daniel Imbelloni Costa e Silva Morais, Juliana Loureiro
Presenter: Daniel Imbelloni Costa e Silva Morais
doi://10.26678/ABCM.COBEM2023.COB2023-1143
Abstract
Inorganic fouling is a complex phenomenon whose consequences can be very detrimental for the industry, as it can lead to a complete blockage of the flow. Fouling is influenced by several variables such as pressure, temperature, flow rate and salt concentration. Thus, this work aims to experimentally evaluate the action of the magnetic field to reduce scale inside pipes. The influence of physical methods on fouling control has been the focus of research since the 1970s, and although existing works in the literature report a significant decrease in deposition due to the effect of the magnetic field, even today the mechanism of action of external fields in the formation of fouling is still poorly understood. Calcium chloride and sodium bicarbonate solutions were used as incompatible brines for the formation of the inorganic scale. The Sliding-Sleeve completion valve was used along the pipeline in different positions and in the 50% opening condition. The magnetic device used was the square magnet, which has 0.55 Tesla in the attractive configuration, and its influence was analyzed at different positions along the flow loop: 0.37 m downstream of the mixture of the solutions or 0.38 m upstream of the valve location. Thus, this work had the specific objective of mitigating fouling by analyzing different valve and magnet positions in the Multipurpose Flow Simulator. The flow rates of the two injection lines were controlled, and absolute pressure measurements were taken along the pipeline and differential pressure in the smart valve, in addition to pH, conductivity and temperature measurements. After the experiment, the fouling masses deposited in different positions along the flow loop were analyzed. It was observed that the magnetic field had the effect of delaying the time for blocking the sliding sleeve valve, when positioned close to the valve, the best case being the valve positioned 28 m from the injection with the magnet positioned upstream of the valve and at the flow rate of 300 L/h. The effect of the magnetic field was more pronounced for the lowest Reynolds numbers.
Keywords
Magnetic Fields, scale, valves
