Diverting system
AssigneeAnsaldo Energia Switzerland AG
InventorsSiegfried TRIPPOLD, Andre KOENIG, Philipp MOLLER, Joerg PFISTNER
Life of this patent
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Abstract
The present invention generally relates to a diverting system to be used in a combined-cycle power plant. According to the invention, the diverting system is integrated within the by-pass stack and carries out, in a sole component, the functions of by-passing the hot exhaust flow in a single-cycle configuration or guiding it through the HRSG, acting as a diffusor, in an open combined-cycle configuration.
Claims12
A diverting system configured to be arranged in a combined-cycle plant downstream an exhaust end of a gas turbine and within an inlet duct structure of a heat recovery steam generator, the diverting system being movable between a single-cycle closed position guiding hot exhaust flow through a by-pass stack part and a combined-cycle open position allowing hot exhaust gas to flow into the heat recovery steam generator, the diverting system comprising a primary blank off plate configured to reciprocate in a vertical direction between said open and closed positions, wherein said primary blank off plate comprises a first portion arranged along a side wall of the by-pass stack part and a second portion arranged transversely across a section of the stack part.
A method of running a combined-cycle plant, the combined-cycle plant comprising a diverting system configured to be arranged downstream an exhaust end of a gas turbine and within an inlet duct structure of a heat recovery steam generator, the diverting system being movable between a single-cycle closed position guiding hot exhaust flow through a by-pass stack part and a combined-cycle open position allowing hot exhaust gas to flow into the heat recovery steam generator, the diverting system comprising a primary blank off plate configured to reciprocate in a vertical direction between said open and closed positions, said primary blank off plate comprises a first portion arranged along a side wall of the by-pass stack part and a second portion arranged transversely across a section of the stack part, the method comprising adjusting, during operation, a height of the blank off plate along said by-pass stack part between said open and closed positions, such to achieve different allocations of the portion of the hot exhaust gas flowing into the HRSG and the remaining one flowing through the by-pass stack part.
Dependencies are inferred from the claim text.