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Circulating fluidized bed boilers

PowerFluid circulating fluidized bed (CFB) boilers are used for steam and power generation. They are characterized by their unmatched fuel flexibility and cover nearly all solid fuels from coal and biomass to alternative fuels and wastes. The clean combustion technology delivers high efficiency and reliability with lowest emissions.

The challenge

Fuel prices and fuel availability are subject to considerable market fluctuations. Supply security is a challenge and emission limits are constantly being tightened. A major challenge for the power generation market is how to efficiently utilize a wide range of different fuels to take advantage of market conditions, while generating minimal emissions and ensuring high equipment availability.

The solution

Circulating fluidized bed (CFB) technology is the best technology for multi-fuel combustion - the ability to use diverse fuels of differing quality. The diversity of fuels ranges from conventional (coal, oil) and biomass to alternative (biogenous residues, sludge, rejects, and refuse-derived waste fractions with high calorific value). The high heat capacity of the fluidized bed evens out the fluctuations caused by fuel quality variations and effectively maintains combustion.

PowerFluid CFB technology utilizes standard features and processes with strongly custom-tailored features for optimum performance.

Benefits of the PowerFluid circulating fluidized bed boiler

ANDRITZ’ circulating fluidized bed technologies are characterized by unequaled fuel flexibility, high efficiency, and the ability to employ a diversity of fuels, including fuels which are difficult to burn. PowerFluid boilers maintain almost complete combustion with lowest emissions of nitric and sulphur oxides and high efficiency.

Highest fuel flexibility

  • Multi-fuel combustion
  • Wide range of heating values, fuel types, and properties
  • Admits fuel fluctuations and other disturbances

Almost complete combustion with lowest emissions

  • Low CO, TOC emissions
  • Low unburned carbon in ash
  • Low SOx with direct desulphurization by adding limestone
  • Low NOx with controlled temperature and air staging

High efficiency

  • Low amount of excess air
  • High burnout rate

Excellent load following capabilities and part load behavior

Reliable design, high availability, and long life


PowerFluid circulating fluidized bed boiler, Maxau, Germany


ANDRITZ Power Boilers, Austria

Phone: +43 (316) 501 792

Contact us

Related links

Biomass boilers

Bubbling fluidized bed (BFB) boilers

Power generation

Steam generators

Solid biofuels


Products & services - details - ANDRITZ GROUP - servertoken