Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
MATHEMATICAL MODELING OF A COLUMN PURIFICATION OF WASTE INCINERATION EXHAUST GASES
Submission Author:
Wellington Balmant , PR
Co-Authors:
Ericson Dilay, Dhyogo Miléo Taher, André Bellin Mariano, JOSÉ VIRIATO COELHO VARGAS
Presenter: Dhyogo Miléo Taher
doi://10.26678/ABCM.ENCIT2016.CIT2016-0281
Abstract
Municipal solid waste is a source of various environmental problems such as contamination of soil and underground water sources. Today, in Brazil the most used alternative for disposal of this waste is still using "garbage dumps"(50%), which cause a lot of environmental damage. The other half of the waste is disposed of in landfill (27.7%) or controlled landfill (22.5%). The problem with these waste disposal methods is that contaminated soil area which is unable to be used for other purposes. An alternative to this is the incineration of such waste. But this technique generates a large amount of gaseous chemicals such as sulfur and nitrogen oxides. Soon a purification of incineration of exhaust gases is necessary. This step is critical in the process optimization and is needed for the process is environmentally and economically viable. Soon the aim of this study is to optimize the purification of the gas output from the incineration of municipal solid waste through mathematical modeling. For this the model depicts a gas purification column counter currently where the gas enters at the bottom of the column and liquid (water or water with addition of sodium hydroxide) at the top. The spine plates have cut in half and arranged alternately causing the liquid and gas move zigzag in the system. The model assumes that the system has two phases: liquid and gas phase. It describes the mass transfer between the liquid and gas phase and chemical reactions occurring in liquid phase where the oxides are transformed into acids. From the model it is possible to find the optimum height of the column and flow of liquid necessary for gas purification according to the flow of the incinerator exhaust gases.
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