With seavis, you can control the water injection for heavy oil burners. Water injection contributes significantly toward improving the combustion of heavy oil and reduces pollutant emissions.

Water under high pressure is mixed with the heavy oil on its passage to the burner. The high pressure atomizes the water. The high temperatures of the combustion process cause these droplets to vaporize, which in turn causes miniature explosions. This causes the heavy oil to be atomized more effectively.

Sequence

As long as the burner is not firing, all three injection nozzles are closed. As soon as the HMI receives the "Burner firing" signal, the MEF is started after the adjusted delay time.

Water injection (MEF): On delay

The three injection nozzles are controlled in eight stages (OFF and stages 1 – 7) after the delay time has expired. The first stage (MIN) switches in low load, while the last stage (MAX) switches in full load. The stages are interpolated linearly between these two points.

To make it possible to reach the eight gradations, the water injection nozzles are designed so that the valve-related flow rate is produced as follows:

Proportional flow rate of the valves

The following eight stages are derived from this:

Percentile water injection