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Ozone destruction system

Effective destruction of excess ozone off-gas

We know that ozone is a very powerful molecule, useful for many applications both in air and water treatment. However, high concentration of ozone may still be present after the treatment, requiring an ozone destruction. We have developed an innovative solution for destroying high loads of ozone: the Contra Ozone Destruction solution.

Residual high concentration of ozone may be left in water application, after the injection in the water phase. Even if we use cutting-edge technologies for maximizing the dissolution in water, some ozone still remains undissolved. The Contra is perfect for large water applications where a high amount of ozone is used. High ozone concentrations are also found in air applications such as sanitation of large volumes.

Solution layout

The Contra is a full solution for ozone destruction fixed on a pallet with standard EUR footprint. The system is composed by several parts, based on the request of the customer, as shown below.

If the ozone stream is particularly humid, a demister will be installed with a purge valve for the condensate. The demister will remove water droplets present in oversaturated conditions. Since condensation must be avoided in the system, a heater will be installed for increasing the temperature by 10-15 °C, according to the recommendations for the material. The temperature before and after the heater will be monitored for regulating the power of the unit with a control panel. In addition, the system may include a pressure sensor for calculating the pressure drops over the bed. An ozone sensor can also be installed for continuously monitoring the outlet concentration. The system is completed with a fan for regulating the air flow rate. The set point of the air flow is continuously monitored and kept constant by adjusting the power of the fan with a control cabinet.

Based on the flow rate to treat, we developed four solutions for adapting to your needs.

  • Great H2S reduction
  • Odor control
  • Lower risk of corrosion problems
Model Capacity max Ozone concentration max PDF
Contra – 50 50 m3/h 300 g/m3 Datasheet
Contra – 150 150 m3/h 300 g/m3
Contra – 300 300 m3/h 300 g/m3
Contra – 500 500 m3/h 300 g/m3

Ozone destruction material

The material used for the ozone destruction is a catalyst specifically designed for this purpose. It is the same material of our OD 100-5000 product series. The catalyst ensures an outlet ozone concentration of 0.1 ppm, regardless the inlet concentration. The material bed is encased in a 316 L stainless steel module, complete with fittings/connections and catalytic material. If necessary, the catalyst material can be easily replaced by opening the encasing module.

Note:  Humidity, dust, particles etc. may have a negative effect on the catalyst lifespan. Catalyst poisons such as sulfur compounds, NOx and hydrocarbons can cause irreversible damages of the catalyst.

Application areas

Benefits

  • Effective ozone destruction below 0.1 ppm
  • Destruction independent from inlet concentration
  • Complete solution for broad range of streams
  • Small footprint: one standard EUR pallet
  • Robust solution with low maintenance needed
  • Modular design, flexible configuration
Technical specifications
Ozone destruction solution specifications
Ozone air flow 0 – 50 m3/h – Contra – 50
0 – 150 m3/h – Contra – 150
0 – 300 m3/h – Contra – 300
0 – 500 m3/h – Contra – 500
Ozone out concentration 0.1 ppm
Temperature 0 – 80 °C
Relative humidity 0 – 100 % RH
Catalyst encasing material 316 L stainless steel

List of components
Unit Description
Catalyst module SS 316 L module for encasing the catalyst material. The module is designed for a user-friendly maintenance and replacement of the material, if necessary
Catalyst bed Ozone destruction catalyst
Piping Piping used connect the parts of the system together, as well as with the process stream. Different types of connections are available
Fan Fan used for flowing the desired air flow rate
Control system Control system for regulating the power of the fan, keeping a constant set point for the air flow rate

Optional accessories
Unit Description
F7-type filter Filter to remove dust and particles going to the catalyst bed
Demister Demister for removing water droplets
Heater Heater to avoid water condensation in the catalyst material
Line ozone sensor Sensor for a continuous monitor of ozone concentration at the system outlet
Ambient ozone sensor Sensor for a continuous monitor of ozone concentration in the surrounding ambient
Pressure sensor Sensor for checking the pressure drops over the catalytic bed

For more information regarding our smaller units for ozone destruction, please check our Ozone Destructors product page.