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32 Cards in this Set
- Front
- Back
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How is water lost in cooling tower basin? |
Evaporation. Drift. Blow down |
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Where does cooling tower supply come from |
J518's (clearwell) & potable water supply |
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J518 pumps capacity and design pressure |
Cap 252m³/hr Pressure 682kpa |
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J518's supply to where |
Cooling tower basin. Demin plant Service water header |
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J422's |
Cooling water turbine and electric pump |
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J422A driver name |
Terry impulse condensing turbine |
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Where does j422 lp steam exhaust to |
E-423 vacuum condenser |
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What are k-425 & r-425a & b? |
Side stream filters & filter blower |
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How many and what kind of valves are on top of cooling tower |
6, Marley valves |
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After Marley valves, what does water flow into? |
Hot water basin then through nozzles into the cooling tower |
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What is wooden tower fill purpose |
Break up water so there's a larger surface area |
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What separates cooling tower basin from pump well and why |
4 sets of 2 screens preventing debris from entering cooling water circulation system and blocking water cooling water exchangers |
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What is the purpose of the cooling water pumps |
Circulate water through the system and return to the top of cooling tower |
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Cooling water pumps rating and type |
5,261m³/hr Submersible, single impeller, double suction centrifugal pumps. |
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Function of louvers |
Act as a barrier to sunlight, noise and water splash out while improving air flow. |
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What is purpose of drift(mist) eliminators |
Minimize amount of water carried to atmosphere |
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K-421's |
Cooling tower fans |
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Purpose of k421 fans |
Draw air through the sides of tower to cool water. Fans have 2 speeds - fast & slow which is determined by the CWS & CWR temperatures |
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Purpose of sidestream filters |
Filter a portion on the cooling water flow to remove dirt particles and precipitates to minimize fouling and scale formation in pipework and exchangers |
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What fire protection and how does it work |
Deluge. Activated when sensors (bulbs) in sensing line under fan deck burst due to heat. Pressure drops allowing the deluge valve to open. |
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Why dose cooling water with chemicals |
Prevent carbon steel corrosion, scale formation, microbiological fouling and copper corrosion. |
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What is gengards function |
Dispersant. Antiscalant |
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What is inhibitors function |
Yellow metal corrosion inhibitor |
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What is flogards function |
Carbon steel corrosion inhibitor |
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What is chlorine function |
Oxidizing bioside |
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What is spectrus BD function |
Biodispersant. Helps the biocide get into the slime |
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What is spectrus NX function |
Biocide Non oxidizing biocide |
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What is foamtrol function |
Antifoam Foam control |
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What is sulphuric acid function |
Acid Ph control |
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What is sodium hydroxide function |
Caustic. Ph control |
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What is the order for truesense |
Flow 1st goes through ph and conductivity analyzers. Cabinet 1 houses analyzers that measure phosphate, free chlorine and STP. Cabinet 2 - electronics that control the analyzers and the results go to the pacesetter in Cabinet 3 and to the dcs Cabinets 1 and 2 make up truesense. The pacesetter (plc) also receives dosing rates from the dsc and the cooling tower make up flow rate. From this info the plc sends signal to dosing pumps and pump speed will be adjusted as required |
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What do you adjust to change chlorine flow |
2 rotometers |
