Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
EXPERIMENTAL EVALUATION OF NATURAL GAS COMBUSTION STABILITY ON BUBBLING FLUIDIZED BED REACTOR
Submission Author:
João Diego Moreira Feitosa , CE
Co-Authors:
João Diego Moreira Feitosa, William Barcellos, Ianna Larah Mendes Silva, Fernanda Emanuelle Possidonio Cardoso, José Welbson Carneiro de Araújo, Francisco Nivaldo Aguiar Freire
Presenter: João Diego Moreira Feitosa
doi://10.26678/ABCM.COBEM2019.COB2019-1054
Abstract
Fluidized bed combustion is a technology suitable for the use not only of solid fuels, e.g. coal and biomass, but also of gaseous ones such as natural gas (NG). Among the advantages of this technology, it is possible to point out: fuel flexibility, high combustion efficiency and low emissions, in particular reduced NOx emissions. In this context, this paper aim to perform a study about the startup process and the combustion stability on bubbling fluidized bed reactor, operating with NG. An experimental apparatus was built in order to carry out this study, in which the core of that setup is a fluidized bed reactor with a combustion chamber constituted of housing in steel coated internally by a layer of refractory material that results in a with inner diameter of 0.110 m and height of 0.935 m. Experimental tests on different operational conditions were performed, varying the equivalence ratio (ER) between 0.61 and 1.27 and the flow velocity between 1.1 and 1.64 times the minimum fluidization velocity. For each test condition, the temperature profiles at different heights of reactor bed were determined and NOx and CO emissions were monitored. Based on results, it was possible to obtain different operating temperature profiles according to the values of ER and flow velocity as well as the influence of these parameters on the combustion stability and efficiency.
Keywords
natural gas, Bubbling Fluidized Bed, startup process, combustion stabilty
