technical NOTES

(Project Pridr) #1
Description FLSmidth KHD Humboldt
Wedag

Thyssen Krupp
Polysiyus

Type of Technology
/Equipment


Hot Disc PyroRotor Prepol - SC
(Step combustor)

Key Benefits



  • Flexibility to use a
    wide variety of alter-
    native fuel qualities

  • High substitution
    rates with difficult
    alternative fuels
    (e.g., whole tyres)

  • Controlled emissions

  • Robust technology,-
    maintaining high kiln
    availability withalter-
    native fuels

    • Flexibility to use
      a wide variety of
      alternative fuel
      qualities

    • High substitution
      rates with difficult
      alternative fuels
      (e.g., whole tyres)

    • Due to the
      complete recir-
      culation of the
      fired material, a
      significantly short-
      er residence time
      is required in the
      PYROROTOR and
      therefore higher
      fuel throughput
      possible

    • Fuel transport by
      proven rotary kiln
      No mechanical mov-
      ing parts in hot area.




1)Flexibility to use a
wide variety of alter-
native fuel qualities
2) High substitution
rates with difficult
alternative fuels (e.g.,
whole tyres)

Expected
Problems



  • There is a high risk
    of sticking, as the
    tires do not circu-
    late on the hot disc
    (rubber Compound).
    This results in
    process disturbanc-
    es and increasing
    pressure loss

    • Overall pressure
      drop will be high
      across precalciner
      due to bigger size
      structure hence
      Preheater fan
      power con-
      sumption
      will increase
      comparatively

      • Poor possibility to
        influence the res-
        idencetime. Only
        with fuel feed rate
        and time sequence
        of shock blower
        operation.





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