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Balance+, Adaptive Control Concept

Combining decades of experience and expertise, ÅF offers Balance+.

Providing modern control solutions for all types of boiler plants, ÅF combines years of experience to create its adaptive control concept called Balance+.

Regardless of the type and size of a boiler plant, Balance+ tackles the challenges that conventional control solutions have difficulty with.

Typically, these challenges come from non-linear multi-variable behaviour, time-delays, furnace slagging, mechanical ageing, and varying fuel quality. Balance+ takes care of all that without time-demanding tuning procedures.

At the heart of Balance+ is an intelligent adaptive process model. Unlike traditional control solutions Balance+ measures direct and indirect data from the process, refers to historical data, and calculates output for controllers.

Balance+ calculates the optimal main control variables for a boiler:

  • Feed water to match steam production
  • Fuel flow to vaporize feed water
  • Air to provide stable combustion and optimal staging
  • Spray water to stabilize steam temperatures
  • Correct actions to compensate disturbances.

Balance+ has already been applied with the I&C systems of ABB, Siemens, Metso and Honeywell.

Balance+ benefits

Lower emissions

  • Less NOx and CO from combustion

Better efficiency

  • Higher steam parameters
  • Lower oxygen content in flue gas

Lower electrical house load

  • Lower feed water pump load
  • Lower air and flue gas fan load

Higher utilization degree

  • Operation point closer to design values
  • More accurate control

Better availability

  • Less stress to heat exchangers
  • Less actuator failures

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Timo Saarinen

Timo Saarinen

Head of Heat & Power, Energy Division