How To Run Boiler On Best Efficiency

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  • Keep an optimal excess air level, generally, about 20% in a coal-fired boiler
  • Tune combustion of coal to the optimal condition.
  • Understand the coal being fired
  • Proper distribution of combustion air at primary, secondary, and tertiary levels
  • Keep the required fineness of coal about 75% through 200 mesh and less than 2% on 50 mesh sieve
  • Keep the maximum mill outlet temperature to reduce air bypassing air pre-heater
  • Soot blowing the entire heat transfer surface at an optimal frequency
  • Minimize the air in leakage to the boiler
Dry gas loss is also influenced by the economizer feed water inlet temperature and the ambient air temperature, which change the heat recovery pattern of economiser & air-pre-heater.

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