Avaliação técnica e econômica do uso do vapor em usina de cana-de-açúcar para produção de suas principais utilidades

Abstract

The power generation through biomass, has been evolving and increasing its gradually efficiency, reaching a saturation level, where, if an updated study of the use and distribution of steam in the sugar industry is necessary in order to get even more efficiency and effectiveness of processes, considering that the final products or utilities that industry are ethanol, sugar and electricity. This thesis aims to conduct a technical and economic evaluation of the use of steam in sugarcane plant, which uses the process of cogeneration, both to meet its industrial needs, such as for the production of its main uses. The methods used in the survey were exploratory, descriptive, explanatory, bibliographic and quantitative. It constructed a reference plant, by average market value of the use of steam and other raw materials. It was performed a sensitivity analysis by Hypotheses plants, using the ROCK software for the simulations. Among the simulations includes A Plant Hypothesis considering the use of straw burning. Among the simulated plants were chosen with the best performance who have called Alpha Plants 1, Alpha 2, Alpha Balance and Balance Alpha + electricity. After the steam distribution between the production of sugar, ethanol and electricity met the point of operational economic and technical balance of sugar and ethanol plant. Alpha Balance + electricity presented the best technical and economic results, because without the need to install or purchase equipment to more processes, the end result was a yield over 14%, ensuring greater productivity and sustainability in the financial situation of sugarcane plants.