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K11 System

Combustion technology

Counter flow furnace with moving grate, upstream recess and auger stoker

Furnace thermal output

525 to 7,675 kW


Water content [% weight]: 10 to 50 depending on configuration

Size [nominal length mm]: ≤ 50

Maximum ash content [% weight]: 2


  • Mechanical de-ashing OR automatic ash discharge to reduce operational maintenance workload and thus guarantee long run times between maintenance shut-downs
  • Suitable for all boiler systems (water, steam and thermal oil)

Supplementary equipment

  • Flue gas recirculation and/or air pre-heating for additional expansion of the range of usable fuels
  • Special version also available for the admixing of specified agrarian biomass (miscanthus, corncobs, etc.) upon customer request

Your benefits by Kohlbach

  • Single or multiple auger feed for optimum infeed dosage, even with very fine grain fuel material
  • Compact and yet adiabatic counter-flow combustion for optimised efficiency and lowest emissions
  • Equipped with hydraulic moving grate, also for fuels with high ash content and poor burn-off behaviour
  • Reliable nominal power with all usable fuels and degrees of water content
  • Reliable long lifespan of combustion chamber thanks to full refractory lining and grate frame construction being cooled with water
  • Rapid and simple installation thanks to pre-assembled modules