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COBEM 2023
27th International Congress of Mechanical Engineering
A COMPARATIVE STUDY BETWEEN THE COMBUSTION OF MINERAL COAL AND AÇAÍ SEED IN BOILERS BY MEANS OF THE CeSFaMB
Submission Author:
Gabriel Willian Moreira Bezerra , PA , Brazil
Co-Authors:
Gabriel Willian Moreira Bezerra, Ana Paula Mattos, João Víctor Ribeiro Moreira
Presenter: Gabriel Willian Moreira Bezerra
doi://10.26678/ABCM.COBEM2023.COB2023-1016
Abstract
The utilization of fossil fuels for energy generation has become popular since the beginning of the 17th century, as it increased emissions of harmful gases into the atmosphere from the burning of these fuels. Brazil is a rich country in natural resources and has considerable potential for investment in renewable energy, such as reusing agroforestry residues as energy biomass. Pará is Brazil's largest producer of açaí, producing 1.4 million tons per year. About 70% of this fruit is composed of stone, often discarded irregularly in urban areas without a fitting end. The CeSFaMBTM is a comprehensive simulation of fluidized bed equipment providing accurate data at pilot and industrial scales, which can be used to simulate boilers operating wholly or partially with biofuels. This work aims to simulate the burning of mineral coal and acai stones in a Babcock & Wilcox bubbling fluidized bed boiler found in literature and, from this, to make an energy and emission comparison of the combustion gases of these fuels. Some results already analyzed in the laboratory showed that 1 kg of mineral coal corresponds to 1.66 kg of açaí seed, making an energy balance of lower heating value. The seed has twice the content of volatiles than coal (78% and 36%, respectively), and the lower the moisture content of the samples of stone, the more the heating value (LHV) approaches the mineral coal. The comparative analysis will be done based on the temperature profile along the freeboard of the boiler in question, the percentage of emission of gases during combustion, such as CO, CO2, NOx and SOx,, and the energy power of boiler operation burning acai stone and mineral coal. Thus, an analysis of the energy efficiency and gas emission of burning acai stone compared to mineral coal in the fluidized bed boiler, Babcock & Wilcox, taken from the literature. Finally, to give an energy purpose to a residue is considered an environmental liability in the state's regions, besides decreasing the production rate of greenhouse gases (GHG) from burning coal, producing green CO2, and generating carbon credits for industries.
Keywords
Mineral coal, Simulation, Boiler, cesfamb, Açaí seed
