Revisão dos planos de manutenção em uma centrífuga de lodo de uma estação de tratamento de efluentes através da aplicação da manutenção centrada em confiabilidade e do FMEA

Abstract

The advance of automation in the world industry has generated new demands, such as greater reliability and efficiency of equipment. Several strategies were developed to meet these demands, but none proved to be as efficient as Reliability Centered Maintenance (RCM), which seeks to guarantee equipment functionality using the minimum of resources. Therefore, the objective of this work is to review the maintenance plans in a sludge centrifuge of an effluent treatment plant through the application of RCM and FMEA. For this purpose, the analysis of failure modes and their criticality through the company's reliability methodology is used. The application followed the methodological steps: choice of the focus area and equipment, choice and training of the multidisciplinary team, familiarization with the equipment, reading the manual, definition of the equipment systems, survey of its components and their functions, definition of the failure mode, their effects and consequences, identification of the cause and qualitative analysis of the failure, definition of maintenance tasks, creation of the proposal and validation of the Maintenance Plan, adjustments and insertion in the system. The results indicate that the maintenance strategies previously applied to the sludge centrifuge were not efficient, were fewer in number, required more time to execute and did not guarantee the reliability of the system, resulting in the occurrence of a high number of corrective maintenance. The new maintenance strategy increased the number of plans covering failure modes that had not been previously identified, decreased the time dedicated to execution, thus increasing equipment reliability.