Open cooling, cooling towers

Tower is full of scale

• The same dosing of scale inhibitor is not applicable to the system or low concentration is dosed
• Thickening of cooling water is too high and LSI of the system thanks to it is high that responds creation ofscale.
• Ion- exchanger doesn´t work correctly. It softs make-up water insufficiently
• When acid is dosed for modification of pH, maybe probe for measuring pH doesn´t work
• Parameters of hardness of make-up water changed against original project and this is not measured regularly
• Puls watermeter works badly. Dosing inhibitor is connected to water hydrometer or pump does not work.
• System is to thickened because of incorrectly set up of automatic blow-down
• Fault is on control unit of dosing to system???

Tower carries  corrosion deposits

• Refrigerating water is turbid or contains increasing concentration of iron (if we calculate ratio of make-up water and its thickening)
• Too soft or osmotic water with low thickening is used
• Water source with high content of chlorides and sulphates is used. It create corrosion during thickening although LSI has a positive value
• Source with high content of iron is used. It precipitates in a system.
• Tower is treated chemically unsuitable
• If sulfuric acid is dosed for treatment pH either once or long-term it leads to excessive reduction of water system pH. After it is strogly corrosive
• Tower is treated biocide badly there is a corrosion in system because of present biofilm
• on Control unit of dosing to system is fault

There is a picture from pipeline of refrigerating water. You can see deposits which are corrosive.

Tower is full of  biological biofilm

• Insufficient biological treatment
• Air in the pump of sodium hypochlorite
• Unsuitable biocide is used

• Control unit of dosing to system is fault

Slime at the bottom of micro-tower

High consumption of water

• Current supplier sets too low thickening treatment. It is possible to hold clean system and consumption of chemicals is higher too. However it has huge costs for water
• Current supplier used chemicals, which are not able to hold hardnees of water at higher concentration and put ignorance of the tower´s owner
• Automatic blow-down works badly
• System has not automatic blow down
• System has not ion-exchanger