Cooling-air cooler for a gas-turbine plant and use of such a cooling-air cooler

Abstract

In a cooling-air cooler ( 10 ) for a gas-turbine plant ( 29 ) of a power plant, in which cooling-air cooler ( 10 ) first means ( 13, 14, 15 ) for spraying water into the cooling-air flow and second means ( 16, 17, 18 ) for generating steam are arranged in a pressure vessel ( 11 ), through which the cooling air flows, between a cooling-air inlet ( 12 ) and a cooling-air outlet ( 20 ) in the cooling-air flow, simplified operation is achieved in that a water separator ( 19 ) is provided on the cooling-air side in the direction of flow downstream of the first means ( 13, 14, 15 ).

1 . A cooling-air cooler ( 10 ,  22 ,  28 ) for a gas-turbine plant ( 29 ) of a power plant ( 30 ,  44 ), in which cooling-air cooler ( 10 ,  22 ,  28 ) first means ( 13 ,  14 ,  15 ) for spraying water into the cooling-air flow and second means ( 16 ,  17 ,  18 ,  23 ) for generating steam are arranged in a pressure vessel ( 11 ), through which the cooling air to be cooled flows, between a cooling-air inlet ( 12 ) and a cooling-air outlet ( 20 ) in the cooling-air flow, characterized in that a water separator ( 19 ) is provided on the cooling-air side in the direction of flow downstream of the first means ( 13 ,  14 ,  15 ).  
     
     
         2 . The cooling-air cooler as claimed in    claim 1   , characterized in that the first means ( 13 ,  14 ,  15 ) are arranged directly downstream of the cooling-air inlet ( 12 ), in that the water separator ( 19 ) is arranged directly upstream of the cooling-air outlet ( 20 ), and in that the second means ( 16 ,  17 ,  18 ,  23 ) are arranged between the first means ( 13 ,  14 ,  15 ) and the water separator ( 19 ).  
     
     
         3 . The cooling-air cooler as claimed in either of claims  1  and  2 , characterized in that the second means ( 16 ,  17 ,  18 ,  23 ) comprise a plurality of spiral tubes ( 17 ) through which water or steam flows and which extend in the form of spirals along an axis ( 53 ) lying parallel to the cooling-air-side flow direction.  
     
     
         4 . The cooling-air cooler as claimed in either of claims  1  and  2 , characterized in that the second means ( 16 ,  17 ,  18 ,  23 ) comprise a plurality of finned tubes ( 23 ) through which water or steam flows and which are arranged parallel to one another and extend parallel to the cooling-air-side flow direction.  
     
     
         5 . The cooling-air cooler as claimed in either of claims  1  and  2 , characterized in that the second means ( 16 ,  17 ,  18 ,  23 ) are subdivided into a first section ( 16 ,  18 ,  23 ) for generating saturated steam and a second section ( 16 ′,  17 ,  18 ′) for generating live steam, and in that the two sections ( 16 ,  18 ,  23 ;  16 ′,  17 ,  18 ′) are connected one behind the other.  
     
     
         6 . The cooling-air cooler as claimed in    claim 5   , characterized in that one of the two sections comprises a plurality of spiral tubes ( 17 ) through which water or steam flows, and the other of the two sections comprises a plurality of finned tubes ( 23 ) through which water or steam flows.  
     
     
         7 . The cooling-air cooler as claimed in one of    claims 1    to    6   , characterized in that the cooling air flows perpendicularly through the pressure vessel ( 11 ) from top to bottom in a single pass, and in that flow occurs through the second means ( 16 ,  17 ,  18 ,  23 ) in counterflow from bottom to top.  
     
     
         8 . The use of a cooling-air cooler as claimed in one of    claims 1    to    7    in the gas-turbine plant ( 29 ) of a gas-turbine power plant ( 30 ).  
     
     
         9 . The use as claimed in    claim 8   , characterized in that the cooling of the cooling air in the cooling-air cooler ( 10 ,  22 ,  28 ) is effected solely by spraying in water by the first means ( 13 ,  14 ,  15 ).  
     
     
         10 . The use as claimed in    claim 8   , characterized in that the cooling of the cooling air in the cooling-air cooler ( 10 ,  22 ,  28 ) is optionally effected by spraying in water by the first means ( 13 ,  14 ,  15 ) and/or by generating steam by the second means ( 16 ,  17 ,  18 ,  23 ), and in that, if need be, the generated steam is used for injecting into the gas-turbine plant ( 29 ).  
     
     
         11 . The use as claimed in    claim 10   , characterized in that the gas-turbine plant ( 29 ) comprises a compressor ( 33 ) and a turbine ( 35 ), in that the cooling of the cooling air in the cooling-air cooler ( 10 ,  22 ,  28 ) is effected by generating steam by the second means ( 16 ,  17 ,  18 ,  23 ), and in that the generated steam is injected between compressor ( 33 ) and turbine ( 35 ).  
     
     
         12 . The use as claimed in    claim 10   , characterized in that the cooling of the cooling air in the cooling-air cooler ( 10 ,  22 ,  28 ) is effected by generating steam by the second means ( 16 ,  17 ,  18 ,  23 ), and in that the generated steam is injected into the cooling air  
     
     
         13 . The use of a cooling-air cooler as claimed in one of    claims 1    to    7    in the gas-turbine plant ( 29 ) of a combined-cycle power plant ( 44 ).  
     
     
         14 . The use as claimed in    claim 13   , characterized in that, if the water/steam circuit in the combined-cycle power plant ( 44 ) is omitted due to a failure of the water/steam circuit or in the course of a stage-by-stage development of the combined-cycle power plant ( 44 ), the cooling of the cooling air in the cooling-air cooler ( 10 ,  22 ,  28 ) is effected solely by spraying in water by the first means ( 13 ,  14 ,  15 ).  
     
     
         15 . The use as claimed in    claim 13   , characterized in that, if the water/steam circuit in the combined-cycle power plant ( 44 ) is omitted due to a failure of the water/steam circuit or in the course of a stage-by-stage development of the combined-cycle power plant ( 44 ), the cooling of the cooling air in the cooling-air cooler ( 10 ,  22 ,  28 ) is optionally effected by spraying in water by the first means ( 13 ,  14 ,  15 ) and/or by generating steam by the second means ( 16 ,  17 ,  18 ,  23 ), and in that the generated steam is used for injecting into the gas-turbine plant ( 29 ).  
     
     
         16 . The use as claimed in    claim 13   , characterized in that the cooling of the cooling air in the cooling-air cooler ( 10 ,  22 ,  28 ) is effected solely by generating steam by the second means ( 16 ,  17 ,  18 ,  23 ), and in that the generated steam is fed into the water/steam circuit of the combined-cycle power plant ( 44 ).