BOILER UNIT AND POWER GENERATION SYSTEM

PROBLEM TO BE SOLVED: To provide a boiler unit and a power generation system capable of shortening a time until a boiler is stopped and reducing the amount of an energy loss. SOLUTION: The boiler unit includes: the boiler for generating steam; turbine drive pumps 51, 53 driven by using steam generat...

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Hauptverfasser:	MIWAYAMA SEIJI, MIYATO MASAHIRO, MURAKI HIROSHI, KIRIHARA YUICHI, MOTOYOSHI HIROYUKI, SUZUKI KEISUKE
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHINBOILERS BLASTING CONTROLLING WATER LEVEL FEED-WATER SUPPLY HEATING LIGHTING MECHANICAL ENGINEERING PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER STEAM GENERATION WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a boiler unit and a power generation system capable of shortening a time until a boiler is stopped and reducing the amount of an energy loss. SOLUTION: The boiler unit includes: the boiler for generating steam; turbine drive pumps 51, 53 driven by using steam generated by the boiler; an electric motor drive pump 55 driven by using electricity; a water supply switch for switching water supply to the boiler between the turbine drive pumps 51, 53 and the electric motor drive pump 55; recirculation piping 61, 63 for connecting the discharge side and the suction side (deaerator 24) of the turbine drive pumps 51, 53; and recirculation valves 71, 73 for controlling a flow rate of water to be recirculated. When the boiler performing low load operation is stopped, after a set value for starting to open the recirculation valves 71, 73 is set larger compared to the case of the low load operation, the water supply switch switches water supply to the boiler from the turbine drive pumps 51, 53 to the electric motor drive pump 55. COPYRIGHT: (C)2010,JPO&INPIT