KHD Preheater

In the early fifties there was a technical revolution. KHD built the first Preheater (Germany, Bomke & Bleckmann), a starting point of a new aera of reducing the heat consumption of the clinker pyro-processing system by nearly 50% at this time.

Today KHD is one of the technical leaders worldwide in this field. The raw meal processed in the kiln first passes through the preheater absorbing the heat content of the kiln and PYROCLON® gases minimizing the heat consumption of the system. KHD Preheaters with modern designed cyclones produce low pressure drops and are high in separation efficiency. The resulting low waste gas temperatures lead to reduced heat losses, waste gas quantitites, CO2 emissions, dust emissions and electrical energy consumption.

Highlights of the new low pressure cyclones are:

  • 270° inlet spiral with improved inlet geometry
  • an optimum of separation efficiency and pressure drop is obtained by properly dimensioned immersion tube, separation efficiency of top stage approx. 95%
  • steep cones to minimize coating tendency
  • low gas flow velocities in the immersion tubes between 10 and 15 m/s