초록 ▼

A power plant may include a steam generator and a steam turbine wherein the steam generator provides steam to the turbine for driving the turbine and exhausted steam from the turbine is condensed in the turbine condenser to be pumped back to the steam generator as feedwater. In order to maintain min

A power plant may include a steam generator and a steam turbine wherein the steam generator provides steam to the turbine for driving the turbine and exhausted steam from the turbine is condensed in the turbine condenser to be pumped back to the steam generator as feedwater. In order to maintain minimum feedwater pump flows and to provide an alternative flow path should the steam generator require less than the available feedwater flow, a recirculation loop is provided for returning a portion of the feedwater to the turbine condenser. According to the present invention, this return flow to the condenser may be used for deaeration of condensate and for the attemperation of bypass steam.

대표청구항 ▼

In an improved power plant of the type having a steam generator providing steam to a steam turbine, said steam turbine exhausting into a condenser for condensing exhaust steam into feedwater for the steam generator; means for pumping feedwater from the condenser to the steam generator, said steam ge

In an improved power plant of the type having a steam generator providing steam to a steam turbine, said steam turbine exhausting into a condenser for condensing exhaust steam into feedwater for the steam generator; means for pumping feedwater from the condenser to the steam generator, said steam generator connected to said steam turbine and condenser through a main steam header and a bypass line respectively; and, wherein the improvement comprises: a recirculation loop for recirculating a portion of said feedwater into the condenser; means for heating said feedwater upstream from said condenser whereby said feedwater is slightly above saturation temperature; and, nozzle means for delivering said heated feedwater into said condenser whereby flashing is effected for deaeration purposes.