Ozone Cooling Tower Water Treatment

When it comes to cooling towers, most operators focus solely on heat reduction, overlooking the crucial aspect of water treatment. However, operational issues often arise, highlighting the importance of water treatment in cooling towers. There are three main factors to consider during the cooling tower water treatment process:

  1. Corrosion: This affects pipes and heat exchanger units.
  2. Solids Formation: Especially in heat exchangers, which impedes heat transfer.
  3. Microbial Growth: Including bacteria and algae.

Addressing all three simultaneously is challenging. For instance, reducing pH to prevent solidification can increase metal corrosion. Enter ozone treatment – a game-changer that tackles all these issues without the need for additional chemicals.

Traditionally, chemical biocides were used for purification, but ozone presents a chemical-free alternative for tackling calcification, corrosion, and microbial pollutants in cooling tower water.

ozone Cooling tower water treatment

Combatting Sediment Accumulation

Sediments, typically calcium and magnesium ion deposits, build up in cooling system units, forming insulating layers that hamper heat exchange. This escalates due to water evaporation, increasing salt concentrations. Ozone treatment curbs sedimentation by breaking down biofilms and preventing ion binding, allowing for efficient water recycling.

Fighting Corrosion

Corrosion, a perpetual concern, can be mitigated by ozone. Microorganisms exacerbate corrosion, but ozone inhibits microbial growth. Moreover, ozone induces a mild electric current, fostering a protective film on metals, akin to stainless steel and aluminium, which reduces corrosion significantly.

Controlling Microbial Growth

Ozone emerges as a potent disinfectant against microbial growth, surpassing traditional chemical alternatives. Its effectiveness against Legionella bacteria is well-documented, making it an indispensable tool in cooling water treatment.

Benefits of Ozone Treatment

Implementing ozone treatment offers various advantages:

  • Minimises the use of costly chemical additives like anti-lime and anti-corrosion agents.
  • Reduces water consumption.
  • Lowers storage and transportation costs associated with chemical biocides.
  • Enhances pump efficiency, resulting in lower energy consumption and improved heat transfer efficiency.

Considerations for Ozone Application

While ozone treatment is highly effective, several factors warrant consideration:

  1. Water Quality: Cooling towers with hard water or high COD values may be less suitable for ozone treatment.
  2. Ozone Half-Life: Ozone’s lifespan in the system is typically less than 10 minutes, necessitating adequate initial ozone concentration.
  3. Coolant Temperature: Ozone solubility decreases at higher temperatures, limiting its application to coolant temperatures below 45°C.
  4. Material Compatibility: Cooling tower materials must be ozone-resistant for effective treatment.

In essence, ozone treatment revolutionises cooling tower water treatment, offering a holistic solution to combat corrosion, sedimentation, and microbial growth, while simultaneously reducing costs and environmental impact. Discover the power of ozone generators for your cooling tower water today!


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