OTIMIZAÇÃO OPERACIONAL EM LINHA DE DESCARGA DO DIGESTOR E FILTROS LAVADORES DE POLPA EM UMA INDÚSTRIA DE CELULOSE

Abstract

The pulp industries are major consumers and producers of electricity and are among the largest industrial sectors in the world. The generation of energy can exceed the consumption of the place, being commercialized, or present a deficit in relation to consumption, requiring the purchase of concessionaires. Whether for the positive or negative balance, the purchase or sale of energy represents a significant amount in the cash cost. Optimizations in the field of electrical generation become constant and necessary to increase the company's competitiveness. The present work sought to evaluate the increase in energy efficiency and the reduction of the energy consumption of pumps in a cellulose industry, through the operational modification in the discharge line of the cellulose digesters and washer filters. For the analysis of this research, the occurrences in the description of the ACD were observed, from June 2019 to June 2020. In the development of the work, it was verified, through the qualitative data, which were the biggest motivators of the cellulose diversion among the digester discharge and the storage towers. As a result, it was found that 80% of the events that led to the deviation of the production system were caused by operational failure. Analyzing the data, the gains generated by the project for the pulp production process were confirmed, with a potential reduction in the energy consumption required by plant “B” in the order of 731.62 MW/year, viability of implementing the project where it is possible to fully recover the investment, generate cash and increase the energy efficiency of the industrial plant.