Patent ID: 7788897
Filing Date: 2010-09-07
Classification: F02C,F23C,F23D,F23L,F23R,Y02E

Abstract:
1. A clean combustion system having a combustor with multiplicity of combustor sections, with low emissions of carbon monoxide (CO) and nitrogen oxides (NOx), comprising: an oxidant delivery system to deliver an oxidant fluid comprising an oxidant; a fuel delivery system to deliver fuel fluid comprising a fuel; a diluent delivery system to deliver a diluent fluid comprising more water or carbon dioxide than in ambient air; a pilot having an inlet to receive one of oxidant fluid, diluent fluid and fuel fluid, and an outlet to deliver a hot pilot fluid; a first combustor section surrounding a first combustion region configured: a second combustor section surrounding a second combustion region configured: a first equilibration section having a first equilibration region configured to receive second combustion fluid from the second combustor section to equilibrate the second combustion fluid for a prescribed residence time, thereby forming a hot combustion fluid comprising hot pilot fluid, diluent fluid, products of combustion, and residual oxy-fuel fluid; a system outlet for the hot combustion fluid in fluid communication with the first equilibration section; and a control system configured to: a fluid temperature of the hot combustion fluid below a prescribed temperature limit; and the emissions in the hot combustion fluid, such that, when adjusted to 15% O the carbon monoxide (CO) concentration is less than 25 ppmvd; and the nitrogen oxides (NOx) concentration is less than 25 ppmvd.