What is the typical combustion temperature range of fluidized bed boilers?

The typical combustion temperature range of fluidized bed boilers is generally found to be between 800°C and 900°C. This temperature range is optimal for efficient combustion of fuels while minimizing the formation of pollutants and improving the overall combustion quality.

In fluidized bed combustion, the bed of particles is suspended in an upward-flowing stream of air or gas, allowing for even distribution of heat and better mixing of fuel and air. The chosen range facilitates efficient combustion of various fuels, including low-grade fuels that may not burn effectively at lower temperatures. Operating within this temperature range ensures that most of the volatile components in the fuel are combusted efficiently while maintaining a balance to limit the production of nitrogen oxides (NOx) and sulfur oxides (SOx), which are significant pollutants.

Maintaining combustion temperatures higher than 900°C can lead to the production of increased NOx emissions, while lower temperatures may result in unburned fuel and increased particulate emissions, thus affecting the overall efficiency of the boiler system.