technical NOTES

Description FLSmidth KHD Humboldt

Wedag

Thyssen Krupp

Polysiyus

Type of Technology
/Equipment

Hot Disc PyroRotor Prepol - SC

(Step combustor)

• Transport principle
  is unsuitable for
  burning difficult fu-
  els. No active mixing
  of air & fresh fuel
  surface.


• Mechanical parts for
  fuel transport are
  directly in contact
  with hot and chemi-
  cal aggressivegases.
  Also the disc is an
  integral part of the
  system and needs to
  run continuous.


• Less flexibility of the
  Hot Disc and risk
  of blockages with
  increasing pressure
  drop and reduction
  of AF throughput.


• Due to its design
  and placement
  location in pre-
  heater its capacity
  has a limitation in
  case of higher TSR
  substitution.
  
  
  • Increase of un-nec-
    essary air to the
    kiln system. Block-
    ages of air nozzles
    by melting fuels
    and slags.
  
  
  • Meal will
    „ extinguish
    “the combustion
    reaction. Fuel is
    covered by meal.
    A lot of unburned
    will drop into the
    calciner.
  
  
  • High consumption
    of “expensive
    “pressurizedair.
    A lot of additional
    leakage air to the
    process with dis-
    advantages in heat
    balance and there-
    fore on clinker pro-
    duction rate. Fre-
    quent blocking of
    nozzles (arranged
    on the floor)
    resulting in
    additional
    maintenance work
    (cost factor!)