Sand attrition in conical spouted beds

• Published in: Particuology Vol. 10; no. 5; pp. 592 - 599
• Main Authors: Fernández-Akarregui, Aranzazu R., Makibar, Jon, Alava, Isabel, Diaz, Luis, Cueva, Fernando, Aguado, Roberto, Lopez, Gartzen, Olazar, Martin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2012; Ikerlan-IK4,Juan de 4 la Cierva 1, Arabako Parke Teknologikoa, E-01510 Minao, Araba, Spain%Department of Chemical Engineering, University of the Basque Country, P.O.Box 644, E48080 Bilbao, Spain
• Subjects: Attrition; Conical spouted bed; Draft tube; Draft tubes; Pilot plants; Pyrolysis; Rate constants; Reactors; Sand; Sand attrition; Spouted beds; 中试试验; 动力学方程; 喷动床; 气体流速; 环境温度; 生物质热解; 磨损; 锥形; Conical spouted bed; Attrition; Sand attrition; Draft tube
• ISSN: 1674-2001; 2210-4291
• DOI: 10.1016/j.partic.2012.02.002

A study was carried out on the attrition in conical spouted beds using two sands with different properties for several bed heights and gas flow rates. Furthermore, the influence of a draft tube was studied at ambient and high temperatures. The main objective was to acquire knowledge on the attrition of sand beds for biomass pyrolysis in a pilot plant provided with a conical spouted bed reactor. A first-order kinetic equation is proposed for sand attrition in a conical spouted bed at room temperature. The predicted attrition rate constant depends exponentially on excess air velocity over that for minimum spouting. Both the draft tube and temperature increase contribute to reduction of attrition.