APPARATUS FOR STEAM ATTEMPERATION USING FUEL GAS HEATER WATER DISCHARGE TO REDUCE FEEDWATER PUMP SIZE

• Main Authors: NARAYANASWAMY KOWSHIK, NARAYAN PRAKASH
• Format: Patent
• Language: English
• Published: 22.04.2010
• Subjects: AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHINBOILERS; BLASTING; CONTROLLING WATER LEVEL; ENGINE PLANTS IN GENERAL; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES; FEED-WATER SUPPLY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; STEAM ACCUMULATORS; STEAM ENGINE PLANTS; STEAM ENGINES; STEAM GENERATION; SUPERHEATING OF STEAM; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To provide an attemperation apparatus and a method for cooling the steam bypassed from a steam turbine 22 during the tripping of the steam turbine 22. SOLUTION: The apparatus is configured to deliver the water discharged from a fuel gas heater 82 to a bypass attemperator 72, where the water discharged from the fuel gas heater 82 is used to cool the bypass steam. Before being used with the fuel gas heater 82, the water used to heat the fuel gas is heated with an economizer 44. The water is delivered to the economizer 44 by the intermediate pressure stage 74 of a boiler feedwater pump 76. The intermediate pressure stage 74 of the boiler feedwater pump 76 is used to supply water to a re-heater attemperator 62, which is used to further cool the steam after being delivered from the bypass attemperator 72 to a re-heater 58. In addition, the intermediate pressure stage 74 of the boiler feedwater pump 76 may deliver water directly to the bypass attemperator 72. COPYRIGHT: (C)2010,JPO&INPIT