Get access

Comparison of the impact of flow pulsations on the performance of various liquid–gas injectors in a gas–solid fluidised bed

Authors

  • Rana Sabouni,

    1. Institute for Chemical and Fuels From Alternative Resources (ICFAR), Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B9
    Search for more papers by this author
  • Franco Berruti,

    1. Institute for Chemical and Fuels From Alternative Resources (ICFAR), Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B9
    Search for more papers by this author
  • Cedric Briens

    Corresponding author
    1. Institute for Chemical and Fuels From Alternative Resources (ICFAR), Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B9
    • Institute for Chemical and Fuels From Alternative Resources (ICFAR), Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B9.
    Search for more papers by this author

Abstract

This article shows that spray nozzles pulsations can greatly improve the distribution of the sprayed liquid on fluidised bed particles, as characterised by a Nozzle Performance Index (NPI). Appropriate pulsations increased the NPI by nearly 100% under several operating conditions. This article compares four pulsating, gas atomised nozzles under various operating conditions. The performance of each nozzle was evaluated by measuring the electric conductance of a bed of silica sand particles fluidised by air, subsequent to liquid injection. Three sets of experiments were conducted to investigate the effect of operating conditions on the performance of the four gas atomised nozzles. The first set determined the effect of the liquid flowrate, the second set measured the effect of a restriction orifice on the atomisation gas line and the third set studied the effect of the atomisation air to liquid ratio. Artificial nozzle spray pulsations were found to have similar beneficial effects with the different types of gas-atomised nozzles. © 2011 Canadian Society for Chemical Engineering

Get access to the full text of this article

Ancillary