UV-C Air 515

Ozone treatment is an established and continuously evolving abatement method of various pollutants in air & water treatment alike. Additionally, its usage as a germicidal agent is also one of its main applications. The secret lies in its high oxidative potential, where the target pollutants or microorganisms are converted into CO2 and H2O by the means of advanced intermediate steps in which the compounds are continuously oxidized and converted until termination. Ozonetech has great experience in optimizing these types of systems with high efficiency in both air and water applications.

UV technology for air treatment

Another technology that has been established for similar applications areas with very promising results, is the UV technology. Utilizing lamps emitting light in the UV range is a conventional method for disinfection purposes due to the subsequent absorption and destruction of microorganisms’ genetic material, commonly used in hospital applications.

More recently, it has been shown to also have potential in the reduction of industrial pollutants e.g. Volatile Organic Compounds (VOCs) and odors as a stand-alone treatment through its photolysis reactions.

 

However, its greatest potential lies in the combination of UV with ozone, as the UV light can both generate and destroy ozone, naturally occuring in the lifecycle of ozone in the atmosphere, depending on the wavelength.

The generated oxygen singlet (O) is highly reactive that can react with various pollutants similarly to ozone, in highly effective oxidation reactions. However, the main phenomenon of interest, is the oxygen singlet reaction with ambient humidity that generates hydroxyl radicals (OH∙). This radical acts on the same and an even larger variety of pollutants and odors compared to ozone, due to its edge in oxidation potential (EOP, see table below). Furthermore, as the hydroxyl radicals have a substantially quicker reaction time than ozone, the required contact time and therefore the size of the treatment can be reduced.

The combination of ozone and UV generates hydroxyl radicals and is therefore an AOP (Advanced Oxidation Process).

AOP can consist of a catalyst instead of UV light, please see our AOP system for water treatment RENA Vitro for more information.

 

Oxidizing Agent

EOP (V)

Hydroxyl Radical (OH∙)

2.80

Oxygen singlet (O)

2.42

Ozone (O3)

2.07

Hydrogen peroxide (H2O2)

1.78

Hypochlorite

1.49

Chlorine (Cl)

1.36

Chlorine dioxide (ClO2)

1.27

Oxygen (O2)

1.23

 


Due to UV technology’s high potential and various application areas, and most importantly, its high compatibility with existing ozone treatment methods, Ozonetech has developed a modular UV solution (UV-C Air 515) for air applications in order to enable additional tools for ensuring an optimal solution depending on the needs of the customer.

UV-C Air 515: Design

The system has been developed in a modular setup by the means of the addition of lamp frames. The lamps are mounted in a frame in order to facilitate easy maintenance and accessibility to the UV reactor chamber. The system can be scaled up to a maximum of six frames, and the system is delivered with a minimum of two frames. Two frames, one placed in the upper channel and one in the lower, is called a UV Lamp Module, and the system is scaled accordingly. Additionally, due to the compressible and turbulent behavior of gaseous media such as air, the system has been designed with an even distribution of flow across the reactor in mind, as this enables efficient utilization of the lamps.

Figure 1 - CAD-drawing of the UV-C Air 515 Reactor.

 

The lamps used in the system are UV-C High-Performance (HP) Lamps, that excels in achieving high lamp power output and therefore high reaction rates with a minimum footprint. HP lamps can achieve an output up to three times higher than that of standard mercury lamps with the same dimensions while providing emission efficiencies of equal or even better than that of standard low pressure lamps. The graph below shows a comparison between the lamp types.

Due to the high reactivity of ozone and hydroxyl radicals, the system’s interior is constructed in highly resistant materials, where the metal used is the premium quality corrosion resistant AISI 316L (EN 1.4404), that has proven resistance to exposure of ozone. 

The system utilizes standard connection joints (PG, alternatively flange connection) used in rectangular ventilation systems allowing for installation of the system without the risk of incompatibility between the reactor and ventilation. Furthermore, the modular reactor can be installed in sequence if higher flow rates than the specified range is required. 

The ballasts required for the UV lamps are supplied in a specialized cabinet, optimized in terms of space and cooling required that ensures the maximum lifetime of both the ballasts and the UV lamps.

Advantages

  • Modular & flexible configuration
  • HP lamps: high efficiency & less lamps required
  • Smart design for even flow distribution
  • Excellent synergy with RENA ozone (AOP)
  • Long lamp lifetime
  • Easy operation
  • User-friendly maintenance

 

Application areas

  • High efficiency removal of VOCs in industrial process air
  • Odor removal in industrial exhaust air
  • High efficiency removal of H2S in industrial process air
  • Disinfection of supply air in commercial buildings & industrial ventilation

 

Technical Specifications

UV Reactor Chamber Specifications

 

Flow rate of pollutants

1800 – 5400 m3/h

Pressure drop

5 – 30 Pa

Module Capacity

3

Operating Temperature

4 – 100 °C

Operating Humidity

0 - 99% Relative Humidity

Required Free Space for lamp replacement

2 m minimum

Main Reactor Chamber Specifications

 

Size of chamber (W x H x D)

873 x 1035 x 1640 mm

Reactor Material

EN 1.4404 stainless steel

Weight of chamber (excluding lamp frames)

Approx. 250 kg

Inlet Connection Size (W x H)

2x 1600 x 400 mm

Outlet Connection Size (W x H)

1600 x 900 mm

Connection Type

Standard Jointing (PG) 20 x 10 mm

Lamp Specifications 

 

Lamp Type

UVC HP Lamp

Rated Lifetime

up to 16000 hours

Enveloping Material

Fused Quartz

Ballast specifications 

 

Operating mode

Pre-heat ignition

Mains Voltage

220 – 240 V

Mains Frequency        

50 – 60 Hz

Maximum Distance to Lamp

5 m

Operating Temperature

5 – 45 °C

Storage Temperature

-5 – 70 °C

Humidity

Maximum 80%, non-condensing conditions

Power loss

2 – 10%

Depends on operating temperature and lamp cable length

Cooling of the unit

External air cooling required

Ozone tech