OPERATIONAL INFLUENCE OF THE MONO-CHAMBER AERATION MODE IN THE LOOP SEAL OF A CIRCULATING FLUIDIZED BED

  • Fernanda de Oliveira Federal University of Technology
  • Guilherme Santos Furquim Federal University of Technology
  • Vitor Otávio Ochoski Machado Federal University of Technology
  • Maria Regina Parise Federal University of Technology
  • Jhon Jairo Ramírez Behainne Federal University of Technology - Parana
Keywords: Solids recycle valve, Gas-particle flow, Chamber aeration, Circulating fluidized bed

Abstract

Fluidization numbers varying from 0.84 to 1.68 were used in the loop seal valve of a bench-scale circulating fluidized bed (CFB) system to analyze the influence of the mono-chamber aeration mode on both the solids circulation rate and the static pressure drop inside the solids recycle device. Runs were carried out using 4 kg of overall solids inventory and particles of 183 µm in Sauter mean diameter, which were kept under fast fluidization regime at superficial gas velocity of 4 m/s. Results showed that the choice of the chamber to be aerated can noticeably affect the gas-solid hydrodynamics. In this sense, the analysis of variance applied on the experimental data indicated that the aeration into the recycle chamber of the loop seal offers lower levels of solids circulation rate but also allows to control it within a wider range of fluidization numbers and with less pressure drop or energy demand.

Author Biographies

Fernanda de Oliveira, Federal University of Technology

Mechanical Engineering Department  - Master degree student

Guilherme Santos Furquim, Federal University of Technology

Mechanical Engineering Department - Undergraduated student

Vitor Otávio Ochoski Machado, Federal University of Technology

Mechanical Engineering Department - Master degree student

Maria Regina Parise, Federal University of Technology

Chemical Engineering Department - Associate Professor

Jhon Jairo Ramírez Behainne, Federal University of Technology - Parana

Mechanical Engineering Department - Associate Professor

Published
2020-12-24