Apparatus and method for controlling steam turbine operating conditions during starting and loading
Patent
·
OSTI ID:5396244
A steam turbine-generator system is described which consists of: a high-pressure steam turbine; a reheat turbine; a boiler including means for heating stem for delivery to the high-pressure steam turbine and a boiler reheat portion for reheating an exhaust steam from the high-pressure steam turbine for delivery to the reheat turbine; main valve means for admitting steam from the boiler to the high-pressure steam turbine; an intercept control valve for admitting steam from the boiler reheat portion to the reheat turbine; means for maintaining at least a selectable predetermined pressure in the boiler reheat portion; a reheater bypass assembly connected between a high-pressure turbine exhaust line of the high-pressure steam turbine and a reheat turbine inlet line of the reheat turbine, the reheater bypass assembly bypassing the reheat portion and the intercept control valve; a check valve in the high-pressure turbine exhaust line downstream of the reheater bypass assembly; and the check valve including means for preventing a flow of steam from the high-pressure turbine exhaust line to the reheat portion while an exhaust pressure of steam from the high-pressure steam turbine is less than the selectable predetermined pressure, whereby exhaust steam from the high pressure steam turbine passes through the reheater bypass assembly directly to the reheat turbine without passing through and reheat portion during at least a portion of a startup cycle.
- Assignee:
- General Electric Co., Lynn, MA
- Patent Number(s):
- US 4598551
- OSTI ID:
- 5396244
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
BOILERS
CONTROL
CONTROL EQUIPMENT
DESIGN
ELECTRIC GENERATORS
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FLUE GAS
GASEOUS WASTES
HEATING
MACHINERY
OPERATION
PRESSURE CONTROL
START-UP
STEAM TURBINES
TURBINES
TURBOGENERATORS
TURBOMACHINERY
VALVES
WASTES
421000* -- Engineering-- Combustion Systems
BOILERS
CONTROL
CONTROL EQUIPMENT
DESIGN
ELECTRIC GENERATORS
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FLUE GAS
GASEOUS WASTES
HEATING
MACHINERY
OPERATION
PRESSURE CONTROL
START-UP
STEAM TURBINES
TURBINES
TURBOGENERATORS
TURBOMACHINERY
VALVES
WASTES