Better Control of the Flue Gas Temperature into the Boiler

A too high flue gas temperature before the boiler will create more sticky flying ashes that will accumulate on the surface of the boiler and force frequent boiler cleaning stops.

Too high temperature is caused by an insufficient combustion control.

Dublix Engineering’s solutions to such problem are:

• Secondary air injection through the furnace roof
• Cooling water spray mixed in the secondary air jet from the furnace roof nozzles to use as an emergency tool to control the furnace temperature when it tends to run too high in spite of the traditional control measures
• FuzEvent High-Level control system

The achieved results are:

• Improved control of furnace temperature
• Optimization of 2 seconds retention time above 850°C
• Better operation of boiler and flue gas cleaning due to better flue gas temperature control