ORAIPL manufactures a wide range of Ozone Generators and Ozonation Systems, for Ozone Treatment of Cooling Tower Water. Since the past 25 years, we have been the trusted global leader in using Ozone technology to treat Cooling Tower water. Use of Ozone in Cooling Tower Water treatment helps to control scaling, corrosion and bio fouling (SCB) of Cooling Tower parts, therefore greatly increasing efficiency of Cooling Towers.
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Cooling Tower Operation and Challenges
Cooling towers (CT) are often deployed for removing heat from industrial operations. Unfortunately, the performance of a Cooling Tower is only as good as water quality; good quality water ensures high cycles of concentration (COC).
Due to the continuous re-circulation of contaminated water in the condenser, the following problems are observed:
- Corrosion of Pipes and Heat Exchanger Units
- Scaling in Condenser Pipes
- Microbial Growth
- Due to scaling and biofilm formation, heat transfer rates are affected.
- Due to continuous deterioration of cooling water, more make up water is required and blow downs are increased; subsequently reducing the Cycles of Concentration (CoC).
Therefore, Cooling Tower water treatment is crucial. There exist technologies (eg., water softening, CDI, Scale Ban, etc) which are useful, but they cannot reduce algae, microbial and organic impurities, that often form even harder scales. Using Ozone for treating Cooling Tower Water quantitatively removes these contaminants, thereby emerging as an alternative and more efficient technology for preventing SCB. This leads to increase in COC and reduces CT blowdown.
Ozonization Process Principle
- Presence of microbes in water can trigger formation of adherent biofilms on heat exchanging surfaces while presence of organics including enzymatic secretions from microbial cells can act as binders and form harder and tenacious scale layers.
- Ozone is a super oxidant. Ozone hinders algal growth, kills bacteria, and oxidizes organic matter in cooling towers.
- Further, ozone advantageously passivates cooling tower metal parts, thereby preventing corrosion of metals. In practice, about 0.1 g/m3 of ozone dosed to recirculating water is adequate to prevent corrosion.
Thus, ozone technology offers effective solution for control of Scaling, Corrosion & Biofouling (SCB) in cooling towers.
Advantages of using Ozone in Cooling Tower Water Treatment
- Ozone is a super oxidant. It is effective towards control of algal growth, killing bacteria and microbes, and oxidizing organic matter in cooling towers.
- Ozone technology can diminish scaling, prevent corrosion and biofouling (SCB) in cooling towers.
- More importantly, it increases COC and reduces the quantity of blow down thereby accounting for savings.
- Ozonisers typically have smaller footprint, and lesser maintenance costs and offer great ease of operation and control on operating parameters.
- Unreacted ozone quickly decomposes to oxygen without producing any toxic residues.
ORAIPL has successfully installed Ozonation Systems that use Ozone for Cooling Tower Water Treatment, for many prestigious power sector and industrial sector clients.
Some of our Cooling Tower Water Ozone Treatment installations are at:
- Khaparkheda Thermal Power Station, Nagpur – 6 kg/hr
- Paras Thermal Power Station, Akola – 8 kg/hr
- Parli Thermal Power Station ( 3 Repeat orders) CITY – 12 kg/hr
- AIIMS, Bhubaneswar – 800 g/hr
- Mylan Lyd Nashik – 20 g /hr
- BHEL, Bellari – 20 kg/hr
- BHEL, Yelahanka, Bengaluru – 10 kg/hr
- Koradi Thermal Power Station, Nagpur – 45 kg/hr