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US 7,607,913 B2Granted
CO controller for a boiler
AssigneeOSIsoft, Inc.
InventorCharles H. Wells
Life of this patent
Estimating the term…
Abstract
A CO controller is used in a boiler (e.g. those that are used in power generation), which has a theoretical maximum thermal efficiency when the combustion is exactly stoichiometric. The objective is to control excess oxygen (XSO2) so that the CO will be continually on the “knee” of the CO vs. XSO2 curve.
Claims17
A method of controlling excess oxygen in a combustion process in a boiler, the method comprising:
- (a) having data comprising carbon monoxide concentration and excess oxygen measurements;
- (b) fitting a curve for said carbon monoxide concentration measurements versus said excess oxygen measurements, wherein said fitting relies on one or more fit parameters, and wherein the values of said one or more fit parameters are found by said fitting;
- (c) determining an excess oxygen setpoint for said combustion process of said boiler based on said one or more fit parameters;
- and
- (d) adjusting said excess oxygen setpoint for said combustion process of said boiler to said determined excess oxygen setpoint, wherein said combustion process uses carbon based fuel.
2 more elements
Dependencies are inferred from the claim text.