Gas and steam turbine plant

Details Gas and steam turbine plant Gas and steam turbine plant

F - Mech Eng,Light,Heat,Weapons

01

K

F01K 23/06 (2006.01) F02C 3/28 (2006.01) F02C 6/18 (2006.01)

Patent

CA 2337485

In a gas and steam turbine plant (1) with a waste-heat steam generator (30) which is located downstream of the gas turbine (2) on the flue-gas side and the heating surfaces of which are connected into the water/steam circuit (24) of the steam turbine (20), for the integrated gasification of a fossil fuel (B) a fuel (B) gasification device (132) is located upstream of the combustion chamber (6) of the gas turbine (2) via a fuel line (130). According to the invention, for especially high plant efficiency, a heat exchanger (159) is connected on the primary side into the fuel line (130) between the gasification device (132) and a saturator (150), in addition to a mixing device (146) for admixing nitrogen (N2), said heat exchanger likewise being connected on the secondary side into the fuel line (130) between the saturator (150) and the combustion chamber (6).

L'invention concerne une installation à turbine à gaz et à vapeur (1) comprenant un générateur de vapeur de chaleur perdue (30) monté en aval de la turbine à gaz (2), côté gaz de fumée. Les surfaces de chauffe de ce générateur sont reliées au circuit eau-vapeur (24) de la turbine à vapeur (20). Pour la gazéification intégrée d'un combustible fossile (B), un dispositif de gazéification (132) destiné à un combustible (B) est monté en amont de la chambre de combustion (6) d'une turbine à gaz (2) via une conduite de combustible (130). Pour que l'installation ait un rendement particulièrement élevé, non seulement un dispositif mélangeur (146) destiné u mélange de l'azote (N2) mais aussi un échangeur de chaleur (159) est monté côté primaire dans la conduite de combustible (130) entre le dispositif de gazéification (132) et un saturateur (150). Cet échangeur de chaleur est également monté dans la conduite de combustible (130) côté secondaire entre le saturateur (150) et la chambre de combustion (6).

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