COLTCS OPERATION

COLTCS OPERATION
Filling the system with water

  • Ensure that screens are in backwash position.
  • Open manually operated isolating ball valves 2 no. each provided in ball extraction and ball injection pipe lines for filling the pipes and pump with water.
  • Open vent valve of Ball collector vessel.
  • When water flows out of the vent, close the vent valve.
Charging fresh balls in the system
  • Ensure that Ball vessel inlet and outlet valves are close.
  • Open vent valve of Ball vessel.
  • Open drain valve of ball vessel till water level in ball vessel falls to 50%.
  • Open hand hole of ball vessel
  • Introduce & squeeze cleaning balls (Blue - 300) under water to remove air until the balls sink below surface of water.
  • Close hand hole of ball vessel.
  • Close vent valve when water starts flowing freely from the vent.
OPERATING PROCEDURE IN MANUAL MODE
    • System is properly filled with water and completely vented.
    • Ball vessel inlet and outlet valves are close.
    • Screens are in ‘Operating Position’.(i.e Screen valves are in closed condition )
    • Both C.W. pumps are running and there is adequate flow through the condenser.
    • Differential Pressure across screens is < 30 mbar
    • Start Ball Re-circulation pump from UCB
    • Open Ball vessel inlet valve
    • After 5 minutes of inlet valve opening, open ball vessel outlet valve.
    • Run the system in operation mode for 60 mins (adjustable). After completion of 60 mins (adjustable), Run the sytem in collection mode (Open Ball vessel bypass valve & close ball vessel outlet valve). After this , the above process is to be repeated till 8 hr ( adjustable ).
    • After 8 hr of continuous operation & collection mode , Run the system in Collection mode for 4 hr. Then it is to be put in backwash mode (2 no. outlet screen to be opened). Stop Ball recirculation pump. Ball counting is to be done jointly with TMD/OPN for checking effectiveness of screen.
    • If at any point DP is greater than 30 mbar , Back wash mode to be operated immediately.

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