Patent ID: 9222671
Filing Date: 2015-12-29
Classification: F23C,F23L,F23N,F23R,Y02E

Abstract:
1. A combustion system, comprising: a high concentration carbon dioxide (CO at least one CO an oxygen supply stream having a flow rate; at least one oxygen flow regulation device configured to adjust the oxygen supply stream flow rate; a mixing device arranged to combine the primary diluent stream and the oxygen supply stream to form an oxygenation stream having a flow rate and an oxygen to CO a combustion fuel stream having a flow rate and a composition; a combustor consisting of at least a primary combustion zone and a burnout zone, wherein the combustor is configured to mix and combust the oxygenation stream and the combustion fuel stream within the primary combustion zone at a flame temperature and a primary residence time sufficient to produce a hot products stream at about equilibrium conditions, and configured to dilute the hot products stream with the secondary diluent stream within the burnout zone to form a combustion products stream having a lower temperature than the hot products stream; an expansion device configured to expand the combustion products stream to form an expanded products stream having a lower temperature than the combustion products stream; a control system, comprising: at least one oxygen sensor located in the expanded products stream at a location spaced from the exit of the expansion device configured to measure the amount of oxygen in the expanded products stream and send a signal to the control system, wherein the control system is configured to adjust an oxygen to fuel ratio of oxygen in the oxygenation stream and fuel in the combustion fuel stream to achieve a substantially stoichiometric combustion as indicated by a near zero oxygen content in the expanded products stream and a measurable oxygen content in the expanded products stream if the oxygen proportion is increased by a small amount; and at least one load controller configured to control the flow rate of the combustion fuel stream to maintain a desired load condition in the expansion device.