Steam condensing apparatus

Claim 2

Apparatus for use in condensing steam from the turbine exhaust of a power plant or the like, comprising a steam condenser having inlet means for receiving steam from the turbine exhaust, hot well means to receive condensed steam, and outlet means for returning condensate from the hot well to the power cycle, cooling tower means having a wet section and a dry section, the wet tower section having an inlet to receive a first cooling medium, an outlet for discharging the first medium, and means for cooling the first medium with ambient air as it passes from the inlet to the outlet, the dry tower section having an inlet to receive a second cooling medium, an outlet for discharging the second medium, and means for cooling the second medium with ambient air as it passes from the inlet to the outlet, means for circulating the first medium from the outlet from the wet cooling tower section into and through tubes within the condenser and then returning it to the inlet to said wet cooling tower section, means for circulating the second medium from the outlet from the dry cooling tower section into and through the condenser and then returning it to the inlet to said dry cooling tower section, means for interrupting the circulation of said first medium between said wet tower section and said condenser tubes, means for emptying said first medium from the tubes and then filling said tubes with the second medium, when such circulation is interrupted, and means for emptying the second medium from the tubes and then refilling the tubes with the first medium, whereby circulation of said first medium between said wet tower section and said condenser tubes may be resumed.

Claim 3

Apparatus of the character defined in claim 1, wherein said cooling tower means includes separate wet and dry cooling towers.

Claim 4

Apparatus for use in condensing steam from the turbine exhaust of a power plant or the like, comprising a steam condenser having inlet means for receiving steam from the turbine exhaust, hot well means to receive condensed steam, and outlet means for returning condensate from the hot well to the power cycle, cooling tower means having a wet section and a dry section, the wet tower section including fill over which ambient air is caused to pass, an inlet having means for spraying a first cooling medium over the fill, and an outlet having a water basin to collect the first medium beneath the fill, the dry tower section including a tube bundle over which ambient air is caused to pass, an inlet for introducing a second cooling medium into the bundle, and an outlet for withdrawing the second medium from the bundle after it has flowed therethrough, a tank into which the second cooling medium may be dumped, means for circulating the first medium from the outlet from the wet cooling tower section into and through tubes within the condenser and then returning it to said wet cooling tower section, means for circulating the second medium from the outlet from the dry cooling tower section into and through the condenser and then returning it to the inlet to said dry cooling tower section, means for interrupting the circulation of said first medium between said wet tower section and said condenser tubes, means for emptying said first medium from the tubes into the water basin and then filling said tubes with the second medium from the tank, when such circulation is interrupted, and means for returning the second medium from the tubes back to the tank and then refilling the tubes with the first medium from the water basin, whereby circulation of said first medium between said wet tower section and said condenser tubes may be resumed.

Claim 5

Apparatus for use in condensing steam from the turbine exhaust of a power plant or the like, comprising a steam condenser having inlet means for receiving steam from the turbine exhaust, hot well means to receive condensed steam, and outlet means for returning condensate from the hot well to the power cycle, cooling tower means having a wet section and a dry section, the wet tower section including fill over which ambient air is caused to pass, an inlet having means for spraying a first cooling medium over the fill, and an outlet having a water basin to collect the first medium beneath the fill, the dry tower section including a tube bundle over which ambient air is caused to pass, an inlet for introducing a second cooling medium into the bundle, and an outlet for withdrawing the second medium from the bundle after it has flowed therethrough, a tank into which the second cooling medium may be dumped, means for circulating the first medium from the outlet from the wet cooling tower section into and through tubes within the condenser and then returning it to said wet cooling tower section, means for circulating the second medium from the outlet from the dry cooling tower section into and through the condenser and then returning it to the inlet to said dry cooling tower section, means for interrupting the circulation of said first medium between said wet tower section and said condenser tubes, means for emptying said first medium from the tubes into the water basin and then filling said tubes with the second medium from the tank, when such circulation is interrupted, and means for returning the second medium from the tubes back to the tank and then refilling the tubes with the first medium from the water basin, whereby circulation of said first medium between said wet tower section and said condenser tubes may be resumed.

Claim 6

Apparatus of the character defined in claim 3, wherein said emptying and returning means includes part of said circulating means.