The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 1989
Filed:
Oct. 06, 1987
Michio Arii, Yokohama, JP;
Yoshihisa Kamataki, Yokohama, JP;
Shirou Hino, Yokohama, JP;
Shoji Matsui, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A combined cycle power plant capable of controlling a water level of a boiler drum of the power plant generally comprises a gas turbine system, a system turbine system, and a waste heat recovery system which are thermally linked with a feed water supply line and a steam supply line. The waste heat recovery system includes a boiler which is provided with a drum containing a feed water. The power plant further comprises a drum water level control system for stably maintaining the water level by selectively carrying out respective controlling modes in accordance with operation conditions such as an ordinary operation time, an operation stop time and a loss of fire of the gas turbine system by for example processing control signals in utilization of a change-over switch.