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19 Cards in this Set
- Front
- Back
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Functions to supply cooling water to the Main Condenser to allow for rejecting of heat from the power operation cycle to the environment.
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Circulating Water System
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Four (4) 25% capacity pumps, take a suction on the Circulating Water Flume and provide the motive force for flow through the Circulating Water System and the Blowdown Line.
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Circulating Water Pumps
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Provides a means for removing solids from the Circulating Water System; taps off of the discharge of the Circulating Water Pumps.
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Blowdown Line
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Provide isolation of each associated Main Condenser Water Box.
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Outlet Main Condenser Inlet and Isolation Valves
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Provide cooling and collection of the Circulating Water after returning from the Main Condenser.
Circulating water coming from the Main Condenser is pumped to the top of the cooling towers where it is distributed evenly. Water cascades down around the periphery where it is broken into small water droplets by the PVC fill. Fans in the top center of each tower draw air through the sides and out of the top of the tower removing heat from the water droplets. The droplets collect in the cooling tower basin and drain to the Circulating Water Flume |
Circulating Water Cooling Towers
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Circulating water coming from the Main Condenser is pumped to the top of the cooling towers where it is distributed evenly. Water cascades down around the periphery where it is broken into small water droplets by the PVC fill. Fans in the top center of each tower draw air through the sides and out of the top of the tower removing heat from the water droplets. The droplets collect in the cooling tower basin and drain to the ____
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Circulating Water Flume
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Collects water which has cascaded down from the top of the Circulating Water Cooling Towers into each Cooling Tower Basin and directs it to the Circulating Water Pump Structure.
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Circulating Water Flume
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Some of the water discharged from the Circulating Water Pumps is sent back to the Mississippi River. This along with the addition of clarified Makeup Water helps maintain Circulating Water quality.
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Blowdown
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Microbiological fouling and Asiatic Clam control
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Sodium Hypochlorite
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ph control to minimize scale formation and corrosion
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Sulfuric Acid
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for main condenser tube corrosion control
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Copper Corrosion Inhibitor
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for scale control
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Dispersant
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For Carbon Steel corrosion control
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Polysilicate
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Dechlorination of the blowdown stream
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Ammonium Bisulfite
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To aid in the clarification process
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Cationic Coagulant
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Provides cooling water to the CWS Pumps and pump motor bearings to remove heat generated from friction in these bearings.
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Circulating Water Bearing Cooling Water (BCS)
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Evacuates air from the Circulating Water Pump casings and piping up to the discharge valve, to prevent the potential of surge/vibration from a water hammer when the Circulating Water Pumps are started. Eductors are establish a low pressure area to draw the air out of the system.
Provides an Emergency backup to BCS for cooling water to the Circulating Water Pumps in the event of a loss of both BCS Pumps. |
Vacuum Priming System (VPS)
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Two (2) 100% capacity pumps, take a suction on the BCS Suction Bays of the Circulating Water Structure and provide motive force for cooling water to the CWS Pump motor bearing coolers and pump shaft bearings. One pump is normally running with the second pump in Standby.
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Bearing Cooling Water Pumps
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One (1) 100% capacity pump, takes a suction on the BCS Suction Bays of the Circulating Water Structure and provides motive force for drawing air from the Circulating Water Pumps discharge lines by pumping water through eductors (venturis). Used for startup of CWS Pumps/System.
Provides Emergency backup of BCS for cooling the CWS pump bearings. Manually aligned/cross-connected to provide 100% backup supply. |
Vacuum Priming Pump
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