Condenser and steam turbine plant provided therewith

Abstract

This condenser is provided with the following: a set of heat-transfer tubes; a main body that covers the heat-transfer tubes; an intermediate body that forms a primary steam passage for guiding exhaust steam from a steam turbine to the set of heat-transfer tubes; and a bypass steam receiving section that receives bypass steam, i.e. steam that has bypassed the steam turbine, and guides the bypass steam to the set of heat-transfer tubes. The bypass steam receiving section is located outside the primary steam passage, and an opening in the main body that is opposite to the bypass steam receiving section is formed at a position where the bypass steam flows into the set of heat-transfer tubes mainly from a region different from an inflow region through which the exhaust steam mainly flows into the set of heat-transfer tubes via the primary steam passage.

1 . A condenser, comprising:
 a set of heat-transfer tubes which is configured of a plurality of heat-transfer tubes through the inner portions of which a medium which performs heat-exchange with exhaust steam exhausted from a steam turbine passes and which turns the exhaust steam back into water;   a main body which covers the set of heat-transfer tubes;   an intermediate body which is positioned between the steam turbine and the main body and connects both, and forms a primary steam passage for guiding the exhaust steam from the steam turbine to the set of heat-transfer tubes in the main body; and   a bypass steam receiving section which receives bypass steam which has bypassed the steam turbine, and guides the bypass steam to the set of heat-transfer tubes in the main body via an opening formed in the main body,   wherein the bypass steam receiving section is disposed outside the primary steam passage, and   wherein the opening of the main body is formed at a position at which the bypass steam mainly flows into the set of heat-transfer tubes from a region different from an inflow region through which the exhaust steam mainly flows into the set of heat-transfer tubes via the primary steam passage.   
     
     
         2 . The condenser according to  claim 1 , further comprising:
 a flow suppression member which suppresses a flow of the bypass steam received by the bypass steam receiving section toward the set of heat-transfer tubes.   
     
     
         3 . The condenser according to  claim 1 , further comprising:
 a water injection section which injects water into the bypass steam receiving section.   
     
     
         4 . The condenser according to  claim 1 ,
 wherein the steam turbine is a horizontal exhaust type which exhausts steam in an axial direction in which a rotor of the steam turbine extends, or to a side of the steam turbine,   wherein the intermediate body is connected to a side portion of the main body, and   wherein the bypass steam receiving section is provided on one of an upper portion of the main body, and a side portion of the main body which is opposite to a portion to which the intermediate body is connected based on the set of heat-transfer tubes.   
     
     
         5 . The condenser according to  claim 1 ,
 wherein the steam turbine is a downward exhaust type which exhausts steam to a lower side of the steam turbine,   wherein the intermediate body is connected to an upper portion of the main body, and   wherein the bypass steam receiving section is provided at a position opposite to the set of heat-transfer tubes in a horizontal direction in a side portion of the main body.   
     
     
         6 . A steam turbine plant, comprising:
 the condenser according to  claim 1 ;   the steam turbine;   a steam supply device which supplies steam to the steam turbine; and   a bypass steam line which guides the steam from the steam supply device, as the bypass steam, to the bypass steam receiving section so that the steam bypasses the steam turbine.   
     
     
         7 . A steam turbine plant, comprising:
 the condenser according to  claim 1 ;   the steam turbine;   a steam supply device which supplies steam to the steam turbine;   a feed water pump which returns water obtained by condensation of the exhaust steam in the condenser to the steam supply device;   a bypass steam line which guides the steam from the steam supply device, as the bypass steam, to the bypass steam receiving section so that the steam bypasses the steam turbine; and   an injection water line which guides the water pressurized by the feed water pump to the water injection section.