Dimensionamento de leito fluidizado para incineração de resíduos sólidos urbanos

Abstract

This paper presents a study on the sizing of fluidized bed for incinerating urban solid waste. We analyzed the fundamental factors for the design of an incinerator. These factors were the minimum fluidization velocity, transport-disengaging height (TDH), and terminal velocity of the particles. Simulations were carried out to determine the behavior of the bed when compared to minimum Fluidization velocity, varying the sphericity and the diameter of the solid particles present in the bed. It is worth pointing out that such velocity is the determining factor in sizing equipment. Regarding the pressure drop depending on the speed, the sphericity and the particle diameter were varied, obtaining as a result the characteristics of refuse-derived fuels (RDF), which optimized the operation of the bed. The terminal velocity was simulated by using the particle diameter as the variation parameter specifically for this paper, since the RDF is between 4.2 and 10 cm, confirming the influence of this characteristic in gas velocity that causes the entrainment phenomenon. Finally, the fluidization column, the distributor plate and the orifice plate were designed, determining the fixed bed height, the column height and the orifice plate.