technical NOTES

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.