Actually I am interested in knowing the theory behind DLN technology. I can see that there are 3 gas control valves (in 9FA) i.e. D5, PM1 & PM4. But can any one explain that just by splitting the gas fuel flow how NOX formation is reduced. Secondly what is diffusion burning.

 

I am no great shakes at DLN technology , i have almost completely worked on conventional burners , but here is a GE doc which explains the DLN burners in good detail.

http://www.2shared.com/document/sOKcNhV5/dln_burners.html

 

This is a generic response, but a good thing to remember. NOx reduction in any combustion process is OFTEN achieved with three T's. Time, Temperature, Turbulence. This applies to coal burners or gas turbine combustors.

Usually the goal is to limit peak combustion temperature by extending combustion time and increasing turbulence to ensure all the fuel is burned. NOx and CO usually are opposite--one goes up and the other goes down.

Water injection is another option. SCR's (basically just like catalytic converter on your car) is another after treatment option.