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AssigneeStone & Webster Engineering Corp.
InventorsDonald E. Labbe, Lawrence J. Line, Christopher T. Geary, Mark C. Leigh, John M. Donohue
Estimating the term…
A method and system for controlling and providing guidance in sootblowing based on continuous plant monitoring and model calculations. The continuous monitoring of plant conditions is through a plant distributed control system (DCS) which communicates with a computer. The conventional measurements of a DCS such as flow, pressure and temperature and sootblower status data are input into the computer. These valves are validated for accuracy. To predict the effects of fouling a plant model is utilized. The model predicts the rate and effect of fouling on energy distribution in the boiler. The model then predicts the effect that sootblowing of each section will have on the boiler performance. A comparison of the predicted and observed effects are used to update the fouling model and maintain consistency with the actual performance of the boiler. This information is presented to the boiler operator to assist in enhancing the boiler efficiency and maintain steam temperatures within established control ranges.
A process for controlling the sootblowing of a coal fired boiler-steam turbine electrical generator system having sootblowers at various locations in the combustion gas side to periodically remove soot from heat transfer surfaces, said process comprising the steps of:
An apparatus for controlling the sootblowing of a coal fired boiler-steam turbine electrical generator system having sootblowers in various locations in the combustion gas side of the boiler to periodically remove soot from heat transfer surfaces, said apparatus comprising:
In a coal fired boiler-steam turbine electrical generator system having a superheat steam temperature control device, a reheat steam temperature control device, a plurality of sensors for obtaining current status data of the system, and sootblowers in various locations in the combustion as side of the boiler to periodically remove soot from heat transfer surfaces, an apparatus for evaluating, prior to actual sootblowing, the effects on the superheat steam temperature control device, reheat steam temperature control device and overall system heat rate performance which will result from implementing various sootblowers, said apparatus comprising a computer programmed to analyze status data obtained from the plurality of sensors in accordance with a predetermined model of the system in order to determine said effects of sootblowing.
A process for controlling the sootblowing of a coal fired boiler-steam turbine electrical generator system having sootblowers at various locations in the combustion gas side to periodically remove soot from heat transfer surfaces, said process comprising the step of applying a set of predetermined criteria to select sootblowing action appropriate to maintain a superheat steam temperature control device within a specified operating range to improve the ability to regulate superheat steam temperatures at or near a predetermined setpoint during normal and transient operations.
A process for controlling the sootblowing of a coal fired boiler-steam turbine electrical generator system having sootblowers at various locations in the combustion gas side to periodically remove soot from heat transfer surfaces, said process comprising the step of applying a set of predetermined criteria to select sootblowing action appropriate to maintain a reheat steam temperature control device within a specified operating range to improve the ability to regulate reheat steam temperatures at or near a predetermined setpoint during normal and transient operations.
Dependencies are inferred from the claim text.