What are the chemicals used in cooling water treatment?
Here are the main chemicals that are frequently used in cooling tower water treatment:
- Corrosion and Scale Inhibitors.
- Algaecides and Biocides.
- pH Adjusters.
Which chemical is best for cooling tower?
Chlorine dioxide – This chemical can be used as a disinfectant to destroy microorganisms and prevent recurring growth.
Why h2so4 is used in cooling tower?
Sulfuric acid is often added to cooling tower water basins to maintain standard pH levels. Acid often distributes poorly in these settings because it is more dense than water. Concentrations of acid at the bottom of basins produce extremely low pH levels, causing long-term damage to the basin and associated equipment.
What is TDS in cooling towers?
Total dissolved solids (TDS): TDS in the circulating water is limited to 5,000 ppm maximum. Although TDS can be as high as 5,000 ppm in the circulating water, there are limits on individual ions such as calcium, which is typically limited to maximum 800 ppm as CaCO3.
Why HCL is not used in cooling tower?
Cooling water is raw water that contains calcium and magnesium as hardnesses. If we dose HCL, it will form an H+ ion which forms a bond with ca+ and mg+ ion, and form salts which can cause scaling.
What is FRC in cooling tower?
Excess chlorine that is not consumed or combined remains in the water. This portion is called free residual chlorine (FRC). The FRC helps prevent recontamination of the treated water.
How can we reduce the hardness of cooling tower water?
Reducing the calcium hardness to 50 ppm, allows the tower to run at 7 to 8 cycles, which is equivalent to over 96% water efficiency. Hardness reduction or removal can be accomplished by lime softening, sodium ion exchange (water softener) or reverse osmosis.
What is COC in water treatment?
What is COC meaning? COC or the Cycles Of Concentration is an abbreviation, used when talking about cooling water or cooling tower water. The COC specifies, how often a fresh water added into the loop, can be used or pumped around, before the water has to blown down or bleed off from the cooling tower.
What is ORP in cooling tower?
ORP is a measure of a solutions oxidizing or reducing strength. The chemical way to look at redox processes is that the reductant transfers electrons to the oxidant. Thus, in the reaction, the reductant or reducing agent loses electrons and is oxidized and the oxidant or oxidizing agent gains electrons and is reduced.
What is ORP of cooling water?
An ORP measurement system can be used to indicate both the quantity and activity of the chlorine in cooling water. Since addition of chlorine increases the oxidizing capability of water, measurement of the ORP provides a useful indicator of the quantity and effectiveness of the chlorine present in the water.
What is a good ORP level for cooling tower?
400-500 mV
Although it can be difficult to correlate ppm levels of chlorine or bromine to specific ORP levels, those in the 400-500 mV range are good indicators of a protected tower while levels below 200 mV indicate a potential problem.
What is COC of cooling water?
Why chlorine is used in cooling tower?
Chlorine frequently is used as a cooling tower biocide because it is cost effective and controls bacteria counts in bulk water. However, chlorine also is corrosive to metals because it is highly oxidizing, and it has additional problems such as causing vapor lock and quickly degrading.
What is TDS and ORP?
Though they are often considered less crucial than pH and chlorine, oxidation reduction potential (ORP) and total dissolved solids (TDS) are important parameters when it comes to water quality.
What is the difference between pH and ORP?
While pH is a specific measure of the Hydrogen ion concentration in solution, ORP only provides relative measures of chemicals and cannot discriminate one from another.
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