초록 ▼

A combined cycle cogeneration power plant includes a combustion turbine formed by an inlet for receiving fuel, an inlet for receiving air, a combustor for burning the combustion fuel and the air, and an outlet through which hot gaseous combustion product is released; a regenerative fuel heating syst

A combined cycle cogeneration power plant includes a combustion turbine formed by an inlet for receiving fuel, an inlet for receiving air, a combustor for burning the combustion fuel and the air, and an outlet through which hot gaseous combustion product is released; a regenerative fuel heating system formed by a plurality of heat exchangers for transferring heat to combustion fuel for heating the combustion fuel, and modulating control valves for controlling temperature of the combustion fuel; a heat recovery steam generator (HRSG) connected to the outlet of the combustion turbine for receiving the gaseous combustion product. The HRSG is formed by a plurality of heat exchangers including steam/water drums, each having a surface blowdown connection, and evaporators connected to the steam/water drums, a water inlet connected with the heat exchangers of the HRSG, a steam outlet, and a stack for releasing the exhausted gaseous combustion product. A steam turbine is provided, and has a steam inlet for receiving steam from the steam outlet of the HRSG, and an exhaust steam outlet; a condenser is connected to the exhaust steam outlet of the steam turbine for condensing steam to a liquid condensate; at least one pump is provided for supplying the liquid condensate from the condenser to the HRSG; and at least one pump is provided for supplying feed water from at least one drum to the HRSG. A conventional-type power plant with a regenerative fuel heating system is also disclosed.

대표청구항 ▼

[ What is claimed is:] [1.]1. A combined cycle cogeneration power plant comprising:a source of combustion fuel;a combustion turbine including:a fuel inlet for receiving combustion fuel,an air inlet for receiving air,a combustor for burning said combustion fuel and said air, andan outlet through whic

[ What is claimed is:] [1.]1. A combined cycle cogeneration power plant comprising:a source of combustion fuel;a combustion turbine including:a fuel inlet for receiving combustion fuel,an air inlet for receiving air,a combustor for burning said combustion fuel and said air, andan outlet through which hot gaseous combustion product can be released;a heat recovery steam generator (HRSG) connected to said outlet of said combustion turbine for receiving said hot gaseous combustion product, said HRSG including:a plurality of heat exchangers each including a steam/water drum having at least one surface blowdown connection, a plurality of evaporators connected to respective steam/water drums, and a plurality of economizers each connected to a respective steam/water drum,a water inlet connected with at least one of the economizers of the HRSG,a steam outlet, anda stack for releasing said hot gaseous combustion product;a regenerative fuel heating system (RFHS) coupled to said source of combustion fuel, and including:a plurality of heat exchangers for transferring heat to said combustion fuel for heating said combustion fuel prior to receipt of said combustion fuel at said fuel inlet,each heat exchanger of said RFHS being coupled to a blowdown connection of a respective steam/water drum of said HRSG, anda plurality of modulating control valves, each control valve being connected downstream of a respective heat exchanger of said RFHS to thereby control flow conditions in the respective heat exchanger of said RFHS to thereby control temperature of said combustion fuel;a steam turbine having a steam inlet for receiving steam from the steam outlet of the HRSG, and an exhaust steam outlet from the said steam turbine;a condenser connected to said exhaust steam outlet of said steam turbine for condensing steam to a liquid condensate; andat least one pump for supplying water to said HRSG.