Cooling Towers at Your Biofuels Plant

Posted by Kaleb Jensen on October 16, 2014 under Cooling Tower | Be the First to Comment

Ozone is both widely known and proven effective at limiting and eliminating biological growth, such as algae. The most logical and relevant way to use ozone within the bio-fuels industry would be in the cooling towers. Ozone can be incorporated into an existing system with minimal system modifications. Often, cooling tower water is treated with disinfectants such as chlorine and bromine, which are consumable and can be costly. Ozone can effectively reduce, if not eliminate, the need for these consumable chemicals within the cooling water loop. Ozone can be injected directly into the cooling tower or it can be injected into the influent stream. If any biological growth is present upon installation of an ozone system, the initial ozone demand will be higher than actually needed during continuous use.  Since ozone is not biased, it will oxidize metals, rubber, and plastics if able to. This is a major concern and also explains the need for why the levels of ozone in a system should be monitored at all time. Ozone generation is an emerging technology that can be very useful and also cost-effective if it is utilized correctly and respected for being a powerful oxidizer.Cooling Tower Flow Chart

Ozone installation for cooling tower

Posted by Joel Leusink on May 24, 2011 under Cooling Tower | Be the First to Comment

Ozone has many applications.  One of these applications is a biocide in cooling towers.  Cooling towers recirculate the same water over and over again within a mostly closed loop system.  This water must have chemical treatment to maintain clean water with no bacteria or algae growth.  Ozone can replace traditional chemicals and offer a green solution to this application.

Ozone use in cooling tower at ethanol plant

We have recently completed an installation of a 300 g/hr ozone generation system into a large cooling tower at an ethanol plant.  The use of ozone will replace chlorine and bi-sulfate chemical additions.  Using ozone will eliminate the need to transport, store, and purchase bulk chemicals.

300 g/hr ozone system for rent

 

The ozone system produces ozone from a 300 g/hr water cooled ozone generator.  This will produce 300 g/hr of ozone from 40 LPM of oxygen at 9% by weight from oxygen.  Oxygen is provided by an Air-Sep AS-D oxygen concentrator using compressed air to provide 40 LPM of oxygen feed gas for the ozone generator.  The AS-D is fed with compressed air supplied by the customers current compressed air systems.

300 g/hr ozone system for rent

Ozone is injected directly into a water recirculation line using a custom ozone injection point.  The picture below shows the ozone gas plumbed into this injection point.  This injection point will diffuse the ozone into the pipe via micro bubbles.  This pipe recirculates ~300 gpm of water, this water travels 150 yards then discharges into the cooling tower basin.  This pipe distance allows the ozone to achieve excellent mass transfer efficiency.

Direct ozone injection

 

Currently this ozone system is rented by the customer with the option to purchase at any time.  This offers great flexibility for the customer, and cost savings over the previous chemical additions.  For information on our ozone solutions for your application contact us today.

View more info on this install on our website.

Cooling Tower Treatment With Ozone

Posted by Joel Leusink on March 4, 2010 under Cooling Tower | Be the First to Comment

Today we took some research on the use of ozone in cooling towers as a biocide and added it to our website.

I thought I would share this information. This data is great, it shows that 0.05 PPM ozone dosage rate into water is a very effective biocide. This is an easy number to remember and does show great results on many application. It’s great when research can validate simple things like this.

Here is the conclusion of this research:

Conclusion

The small scale test demonstrated that a low concentration of .05 mg/L of ozone is effective in treating water cooling systems. The corrosion levels with the use of ozone were less or non existent. The encouraging results from the test lead to the construction and operation of a pilot plant treating 1,000 m3/h cooling water in a West German power plant.

Click here for a link to the research on our website

Click here for a link to the cooling tower application page on our main website

Contact us for more information on this ozone application