Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
Analysis of corrosion and fouling development in a biomass steam generator burning sludge from a slaughterhouse effluent treatment plant
Submission Author:
Eduardo Burin , PR
Co-Authors:
Eduardo Burin, Fabiana de Marqui Mantovan, Leandro Rogel Silva, Cristian Giliard Zapalai, Erick Cardoso Costa, Fabio Antonio Xavier, Edson Bazzo
Presenter: Eduardo Burin
doi://10.26678/ABCM.ENCIT2022.CIT22-0280
Abstract
The objective of this work was to evaluate the impact of burning sludge mixed with eucalyptus woodchips in the development of corrosion and fouling in a biomass boiler used to generate saturated steam for a poultry slaughterhouse. In this regard, a probe was positioned at the exit of the furnace. This probe served as a support for the installation of ring specimens whose temperature was controlled by adjusting the flow of cooling water. Tests were performed for three sludge:woodchips mixtures (0, 5 and 10%), while the temperature of the specimens made of SA 178M GrA steel was maintained at 180oC. After experiments, specimens were prepared and SEM/EDS was performed. As results, a reduction in the amount of material deposited on specimens was observed with increasing sludge content. This trend is possibly due to the higher concentration of sulfur in the sludge, what may have caused the sulfation of species such as KCl. The higher sulfur and lower chlorine contents in the depositions seem to confirm this hypothesis. In general, the sludge combustion seemed to generate benefits regarding fouling in high temperature zones of the boiler, while no evidences were identified regarding aggravation or mitigation of corrosion.
Keywords
Co-firing, corrosion, fouling, Wastewater Treatment Plants, Wood chips
