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.