• Air preheater / regenerative

Article: 00103551

Air preheater / regenerative

If the flue gas temperature of a process firing system is especially high, economizers can only be used under certain conditions. In these cases air preheaters can be used: They remove valuable energy from flue gas which would otherwise go unused up the funnel, using it instead to preheat the combustion air of the firing system. A preheater used in this position can save up to 10% on fuel and also lower the impact on the environment considerably.

Air preheaters of this type are typically located downstream from high-pressure steam boilers and thermal oil heater with a flue gas temperature that often reaches 350°C or more. The combustion air can be preheated to as much as 300°C in this case. The resulting high level of efficiency means amortization times are less than two years. Air preheaters are now used more frequently in low temperature ranges as well, for example in conjunction with calorific value technology.

Specifications

  • Heated fluid: air
  • Heating method: regenerative

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