Multiple boiler steam blending control system for an electric power plant
A steam blending control is provided for two or more boilers in an electric power plant. To blend an oncoming boiler with an online boiler, the oncoming boiler is fired to a pressure ramp setpoint and outlet steam is isolated from the plant turbine and directed through position controlled bypass valve means. When steam temperature and pressure conditions are matched, the oncoming boiler isolation valve is opened and the bypass flow then existing is stored in a memory. The oncoming boiler bypass flow is cut back with total oncoming boiler steam flow controlled to the memorized flow valve as a setpoint. Flow from the on-line boiler is cut back under load control as the oncoming boiler flow to the plant turbine is increased. Deblending is implemented in a similar manner.
- Assignee:
- Foster Wheeler Energy Corp; Westinghouse Electric Corp
- Patent Number(s):
- US 4306417
- OSTI ID:
- 5487258
- Resource Relation:
- Patent File Date: Filed date 28 Nov 1979; Other Information: PAT-APPL-098106
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BOILERS
CONTROL SYSTEMS
THERMAL POWER PLANTS
DESIGN
ELECTRIC POWER INDUSTRY
FUEL SYSTEMS
HIGH PRESSURE
MIXING
STEAM
STEAM GENERATORS
VALVES
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
INDUSTRY
POWER PLANTS
VAPOR GENERATORS
200101* - Fossil-Fueled Power Plants- Cooling & Heat Transfer Equipment & Systems
200104 - Fossil-Fueled Power Plants- Components