Solution

Flameless Combustion: The Solution

Direct combustion disadvantage

Waste gas streams are often produced at low energy content (Lower Heating Values or LHV), insufficient to maintain direct flame based combustion without addition of other combustible gases. Direct combustion solutions therefore create a number of issues:

• Additional combustible gas requirement
• High temperature combustion zone (temperatures above 1400 °C
• Incomplete combustion

Proprietary Technology Solution

The technology WTE-Tech has developed is based on the concept of Flameless Combustion. Flameless Combustion (FC) is a mode of auto oxidation in which oxidation takes place above auto-ignition temperature (650-700 °C) and below adiabatic flame based combustion temperatures (1950-2000 °C).

Under conditions of FC any hydrocarbon containing steam is intensively mixed with the required amount of combustion air (mixing only at the furnace inlet, no pre-mixing). In the combustion chamber, kept at temperatures above auto-ignition temperature a homogeneous oxidation reaction takes place in the gas phase, utilizing the full volume of the combustion chamber.

Preferably temperatures are kept at a level of 900- 1200 °C, in any case at temperatures below 1400 °C to avoid NOx formation.