Effects of pressure drop and superficial velocity on the bubbling fluidized bed incinerator

Abstract

Since performance and operational conditions, such as superficial velocity, pressure drop, particles viodage, and terminal velocity, are difficult to measure on an incinerator, this study used computational fluid dynamics (CFD) to determine numerical solutions. The effects of pressure drop and superficial velocity on a bubbling fluidized bed incinerator (BFBI) were evaluated. Analytical results indicated that simulation models were able to effectively predict the relationship between superficial velocity and pressure drop over bed height in the BFBI. Second, the models in BFBI were simplified to simulate scale-up beds without excessive computation time. Moreover, simulation and experimental results showed that minimum fluidization velocity of the BFBI must be controlled in at 0.188-3.684 m/s and pressure drop was mainly caused by bed particles.

Three-dimensional CFD simulation and experimental validation of particle segregation in CFB riser

“…On the other hand, abrupt shape riser (Figure 9) also showed the same trend, where solid holdup tends to decreasing from 0.35 to 0.27 as the gas velocity increases from 4 m/sec to 7.7 m/sec. These findings are consistent with earlier findings on solid holdup in CFB riser (Issangya et al, 1999;Yin et al, 2012;Efhaima and Al-Dahhan, 2015;Mabrouk et al, 2005;Yoo et al, 2017) and the same nature of solid holdup was examined in a bubbling fluidized bed system as well (Wang et al, 2007).…”