Why MICRO pulsation?

Intelligent Solution for effizient Burning processes

Tunnel kilns are generally equipped with firing plants that switch between different burner capacities. Full load is throttled to partial load as soon as set-point temperature has been achieved. Thermo elements installed in the kiln ceiling will frequently deliver wrong measurement results since temperatures in the bottom part of the load are lower than in the upper segment. From the pre firing zone, this discrepancy may continue throughout the whole process, resulting in needlessly long firing times. Temperature equalization is achieved through longer dwell times.

This constellation resulted in the following considerations:
1. An ideal temperature equalization at the end of the pre firing zone should save burning time without impairing product quality. Reduced energy consumption should render the whole process more efficient.
2. Below 800°C, heat transmission strongly relates to the flow rate of the hot gases. Thus, burners should not operate in partial load with low exit velocities on a permanent basis.
3. Therefore, a fine-tunable control system is needed to keep exit velocities at high rates even when energy input is low.
With our MICRO pulsation concept, we have successfully met  these demands. Flexible energy input is achieved through a series of single impulses with interferent modulation of pulse duration. Slow exit velocities in partial load mode are faced by firing with maximum air throughput even when fuel gas throughput is low.
The result of our efforts is a system that allows us to heat up loads faster, to precisely control the input of energy, to maintain high recirculation rates, and to achieve quicker and better temperature skim. It has furthermore proven that burner groups can be saved at glost firing temperatures, allowing for a reduction of 8% in energy consumption on a regular basis.

This constellation resulted in the following considerations:

  • An ideal temperature equalization at the end of the pre firing zone should save burning time without impairing product quality. Reduced energy consumption should render the whole process more efficient.
  • Below 800°C, heat transmission strongly relates to the flow rate of the hot gases. Thus, burners should not operate in partial load with low exit velocities on a permanent basis.
  • Therefore, a fine-tunable control system is needed to keep exit velocities at high rates even when energy input is low.

With our MICRO pulsation concept, we have successfully met  these demands. Flexible energy input is achieved through a series of single impulses with interferent modulation of pulse duration. Slow exit velocities in partial load mode are faced by firing with maximum air throughput even when fuel gas throughput is low. 

The result of our efforts is a system that allows us to heat up loads faster, to precisely control the input of energy, to maintain high recirculation rates, and to achieve quicker and better temperature skim. It has furthermore proven that burner groups can be saved at glost firing temperatures, allowing for a reduction of 8% in energy consumption on a regular basis.