Abordagem quantitativa usando estatísticas para avaliar a confiabilidade de incineradores de resíduos sólidos industriais para aplicação da MCC

Abstract

Throughout the years, solid waste have become a great environment challenge to Estates around the world, once its final destination is a disturbing concern to the involved, mainly, when they involve hazardous waste. That being said, incenerators have been being one of the most used alternatives proposed for the problem management. However, for this operation, it is necessary the fulfillment of harsh laws imposed by various legislations and by environmental organs, which demand an efficient operational management mecanism to be incorporated to the processes in issue. In view thereof, this thesis had as an objective the use of a quantitative analysis in the first part of implementation, from the perspective of the philosophy of Reliability Centered Maintenance (RCM), since this application is capable of allowing, by means of a probabilistic study, the determination of the life time of the equipment of the incinerator under study, besides allowing to identify the subsystems that can cause the occurrence of failures. Thus, for the development of this research, the use of Reliability Engineering tools in an industrial solid waste incinerator (ISWI) was presented through statistical analysis applied in R-Studio software. In order to do so, we opted for the elaboration of a routine for collecting time data until the incidence of some system failure; by building the block diagram of the systems; and the use of mathematical modeling, which allowed us to identify which systems were most likely to fail. In addition, the statistical hypothesis test, associated to the nonparametric method, facilitated the selection of the best probability distribution. Among the tested distributions are: generalized gamma, Weibull 2p, gamma, exponential, and log-normal (which showed better adherence to the greater number of ISWI systems). Finally, the study was delimited based on historical data of failures, over six years of operation of the furnace incinerator present in this case study.