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Article
Effect of Intruded Exit on Riser Type Circulating Fluidized Beds
Chemical Product and Process Modeling (2010)
  • Sudarshan K. Daga, Indian Institute of Technology Roorkee
  • Vineet Kumar, Indian Institute of Technology Roorkee
Abstract

The present work attempts to study the flow dynamics of Geldart group A and group B particles in a circulating fluidized bed (CFB) riser with intruded exits using computational fluid dynamics (CFD) techniques. In this work, three different designs of riser exit geometries were studied using a 2D transient Eulerian approach with kinetic theory of granular flow in a commercial CFD simulation package. The three exits geometries, namely conventional exit, intruded curved and straight exits were designed and simulated. The various factors like solid volume fraction, pressure drop, and solid velocity were studied for both group A and group B particles. Results indicate that intruded exits have certain advantages like low riser pressure, uniform particle distribution, etc., over the conventional design because fluid and particle comes out from the core of the riser where there is no wall effect and particles have higher momentum concentration.

Keywords
  • circulating fluidized bed (CFB),
  • computational fluid dynamics (CFD),
  • exit geometry,
  • pressure drop,
  • Geldart A,
  • Geldart B,
  • fluidization,
  • solid volume fraction,
  • fluid catalytic cracking
Publication Date
March 31, 2010
Citation Information
Sudarshan K. Daga and Vineet Kumar. "Effect of Intruded Exit on Riser Type Circulating Fluidized Beds" Chemical Product and Process Modeling Vol. 4 Iss. 1 (2010)
Available at: http://works.bepress.com/vineet_kumar/1/