Simulations of flow behavior of gas and particles in spouted bed with a porous draft tube

✍ Scribed by Wang Shuyan; Liu Yongjian; Liu Yikun; Wei Lixin; Dong Qun; Wang Chunsheng

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 842 KB
• Volume: 199
• Category: Article
• ISSN: 0032-5910
• DOI: 10.1016/j.powtec.2010.01.012

✦ Synopsis

Flow behaviors of particles in a two-dimensional spouted bed with a porous draft plates are studied using a fluid dynamic computation with kinetic-frictional stresses models. Gas flow through the porous draft tube is simulated by Brinkman-Darcy-Forchheimer formulation. The distributions of concentration and velocities of particles are predicted. Simulated results predict the solid circulation rate and gas flux rate measured in the spouted bed with a porous draft tube (Ishikura et al., 2003). The solid circulation rate in the spouted bed with a porous draft tube is larger than that with a non-porous draft tube. The predicted bed pressure drop with the porous draft tube is high in comparison to the spouted bed with non-porous draft tube. The effect of the porosity of the porous draft tube on distributions of gas flux rate through the annulus and solid circulation rate are discussed.