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Posted by Kevin on November 24, 2003 at 07:41:40:
We recently put an 80,000 lb. per hr. Nebraska Water Tube on line, it has FGR on Natural Gas with a 200hp F.D. variable frequency fan & am wondering what experiences people have when operating. It works excellent but at higher loads around 50% or better the inlet air duct & breeching start to rumble. I am assuming that this is normal being we are recirculating air that could have unburned fuels causing small secondary explosions. There are a few operator worries about the new noises & any comments would be great, thanks.