Cooling Tower Water Purifiers

For controlling legionella, microbes, salts, biofilm and odour
in cooling towers, warm water systems and evaporative coolers

Leading Edge Technology | Water Purifier Systems | Larger Systems

Smaller Systems | Evaporative Cooler Purification | Controllers

Oztec Service | Data Tables

Leading Edge Technology

High technology products, designed specifically for purifying water in cooling towers, warm water systems and evaporative coolers. Ozone Water Purifiers can:

• Kill Legionella bacteria.
• Kill other bacteria, viruses and protozoa.
• Also kill microbes which live on surfaces of the equipment, such as pseudomonas fluorescens, which produce biofilm.
• Remove bioslime and scale from equipment surfaces. This improves heat transfer and increases efficiency and reduces power consumption.
• Eliminate odours from the system.
• Retard fungi, moulds and algae.
• Reduce corrosion, compared to traditional chemicals.
• Reduce running costs, as the only on-going cost is electricity - there are no consumables.
• Result in less frequent maintenance and quicker maintenance turnaround, due to less biofilm buildup.
• Result in less bleed-off water dumping, as recirculation rates can be increased.
• Reduce concentrations of mineral salts and organic load in the water, and reduce scale on surfaces.

• Extend the life of components.
• Avoid the need to handle hazardous chemicals, as ozone is made on-site.
• Avoid the risk of chemical dosing vats being left unattended and running dry.

Ozone really is the ideal disinfectant for cooling towers. It is 50% stronger and 3,000 times faster at killing bacteria, compared to chlorine. Yet it requires no consumables as it is generated on-site, electrically. It leaves no long term chemical residue. Ozone is made from life-giving oxygen. The oxygen is passed through a plasma field where ozone is created. It is then dissolved in water. It kills microbes by a process of protein restructuring and removes other pollutants by oxidation.

Ozone treatment of Cooling Towers is now supported by many international organisations, including:
- Department of Energy, USA.
- EPRI (Electric Power Research Institute).
- CTI (Cooling Tower Institute).

There are now thousands of ozone cooling tower sites throughout the world supported by legionella legislation in most countries.

Our Cooling Tower Water Purifiers are Fully Integrated Systems. We are one of very few companies in the world with this approach - we take the "hassle" out of your plant. All components are carefully designed, balanced, preconnected (electrics, pneumatics, hydraulics, mechanics) and combined into one single chamber.

Ozone is fast becoming the preferred method of cooling tower treatment around the world. Join the ozone revolution - control bacteria - and protect your cooling tower investment.

Water Purifier Systems - WS8, WM8

Ozone takes the "hassle" and complexity out of your Water Purifier decision - all systems are complete and integrated units. Each unit includes the following parts inside one chamber:

- Ozone generator module - Integrated electrics/switches
- Oxygenator/compressor module - Integrated pneumatics
- Venturi kit module - Integrated hydraulics - Water pump module - Hartford safety loop - Double skinned chamber.
- Detailed Instruction Manual

Model WS8 is rich with great features, whilst model WM8 is the mobile equivalent. Both models feature:

• Plasma ozone source to generate high outputs (up to 20 g/ hour) at high concentrations (up to 4% by weight).
• Built-in oxygenator with molecular sieve, rotary air compressor, water trap and sight glass.
• Unique air cooled and cleanable emitters, with a high flow rate cooling fan and large pre-filter.
• Control switches, fuses, voltage meter, gas flow gauge, safety microswitches, gas valve, water valves.
• Polymer coated, zinc treated case, with access doors and integrated venturi kit, water pump and pipe fittings.

A number of variables must be analysed to configure a quality "ozone water purification system" to suit your particular cooling tower. However, a general conceptual configuration is shown above. A small recirculation pipe loop is installed around the basin, entering and exiting the basin at opposite sides. This is connected to the WS8 venturi and water pump. High ozone concentrations are injected into the water each time it recirculates around the basin.

In most correctly designed systems no corrosion inhibitor is required and corrosion rates are significantly less than occur with traditional chemical disinfectants. (In a minority of cases a proprietary corrosion inhibitor is added).

Larger Systems - WS9-50, WS9-100

Model WS9 is, of course, a bigger version of the WS8, for outputs up to 100 g/hour and concentrations up to 14% by weight:

• The WS9 is fully integrated, with all modules squeezed into one case - oxygenator, venturi kit, water pump, all connections, etc.
• The electronics are very sophisticated with a touch pad control, PCB logic and LCD display. This allows automatic programming and feedback signals from Controllers.
• Internal sensors provide performance monitoring and a digital "self help menu" makes maintenance simple.

Smaller Systems WS2-1500

Model WS2 is a smaller version of the WS8 and, therefore, is also a complete integrated system. It is ideal for small packaged cooling towers with lower water flow rates.

It includes extensive features:

• Ozone generator with plasma emitters (usually set at a design rate of 2 g/hour output).
• Dryer Chamber and pleated filter cartridge.
• Water pump and Hartford Loop.
• Venturi Kit with viewing window.
• Control switches, fuses, gas flow gauge, water valves, check valves, switch, adjustable ozone output and electronic cyclical timer.

All components are packed into a single compact chamber, with polymer coating, hinged access doors and easily operated controls.

Evaporative Cooler Purification WE1

An Evaporative Cooler is effectively a "reverse cooling tower" as it uses water to cool air. Although water temperatures are a few degrees lower, Legionella can survive at temperatures down to -80°C and it multiplies actively at 20°C. In addition, Evaporative Coolers build up bioslime, odours and salts. The WE1 can control all these problems.

The WE1 is a compact device which is mounted inside the cooler and its porous diffuser ball is simply dropped into the cooler basin. The WE1 generates a patented mixture of proprietary oxidants which kill microbes, control salts buildup, improve general hygiene and can reduce water consumption dramatically.

The WE1 comprises patented plasma emitters, a compressor, air filters, plasma source, electronic timer, signal light and much more, packed into a micro, cost-effective unit.

Controllers

A large range of Controllers is available for measuring ozone concentrations in the gas phase or liquid phase.

Manual "wet chemistry" sets are available for cost effective measurements whilst sophisticated electronics control the whole system.

Oztec Service

Ozone provides extensive documentation to assist customers (and Distributors). Customers can fill out a "Fact Finder" document to help size up the job. Ozone can then generate a Sizing Report by reference to Oztec - a computer database which records our extensive experience and research with cooling tower water treatment. We can also generate Component Lists and Layout Drawings as required. The products themselves include extensive Instruction Manuals.