Thanks RMW. I've included a picture of the burner for your review. I appreciate any additional thoughts you might have.
My thoughts too have been that the excess air and the overfired air are the place to focus. We recently reduced the CFM of air that was being used to carry the fuel to...
Here is the problem. I have a biomass suspension burner that is producing too much carbon monoxide (CO). It runs on clean, dry, hardwood wood that has been dried and size reduced in a hammermill through 1/4" screens to a moisture content of about 9%. That fuel is blown into the suspension...