Apparatus and method for fluidly connecting a boiler into pressurized steam feed line and combined-cycle steam generator power plant embodying the same

Patent · Tue Mar 18 00:00:00 EST 1986

OSTI ID:5708915

Martens, A; Wescott, K R; Snow, B E

An apparatus is described for starting a steam boiler and for coupling a steam output thereof through a throttle valve and a header to a steam feed line at an operative pressure and temperature. The apparatus consists of: means for draining through a bypass line steam from the steam output before the throttle valve with the throttle valve being closed initially; with the draining means including a controlled drain valve and control means controlling the drain valve in a first mode for admitting a derivation flow at predetermined minimal constant flow level in the bypass line as the pressure of the steam output is increasing from substantially zero level; the controlled valve in a second mode admitting in the bypass line from the steam output a derivation flow increasing in relation to the increase of the steam output; the control means controlling the draining means in the second mode to pass a derivation flow corresponding substantially to the operative pressure at the steam output for closing the drain valve and subsequently for opening the throttle valve, whereby the header receives steam concurrently from the feed line and from the boiler at substantially the same operative pressure; with first means for sensing the operative pressure in the header; second means for sensing pressure of the output steam; the control means being responsive to a pressure intermediate between the substantially zero level pressure and the operative pressure to shift operation from the first mode to the second mode.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA
• Patent Number(s): US 4576124
• OSTI ID: 5708915
• Resource Relation: Patent File Date: Filed date 25 Oct 1984
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
42 ENGINEERING
COMBINED-CYCLE POWER PLANTS
STEAM GENERATORS
VALVES
DRAINAGE
PRESSURE DEPENDENCE
PRESSURE MEASUREMENT
PRESSURIZING
START-UP
STEAM LINES
TEMPERATURE DEPENDENCE
BOILERS
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
POWER PLANTS
THERMAL POWER PLANTS
VAPOR GENERATORS
200104* - Fossil-Fueled Power Plants- Components
421000 - Engineering- Combustion Systems