Waste Air Cleaning System
- Effective reduction of:
- Pollutants
- Odours
- Solvent emissions
The cleaning of polluted waste air is an up-to-the-minute topic for many companies.
What used to be a voluntary indication of exemplary environmental awareness has now become regulated reality. Due to
VOC Solvents Directive not only big industrial companies with drastic waste air problems, but also small and medium sized
business are now obliged to install effective waste air cleaning systems.
These systems are designed to clean polluted and odour-laden waste air so that it can be safely released into the
environment.
Our answer to this problem is Phoenix – efficient and cost-effective.
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Phoenix is the perfect combination of photo-oxidation and
catalytic oxidation. The process occurs in special customized and
exactly calculated reaction units. Dimensioning of the respective
system is not only determined by the waste air volume to be cleaned
and the pollutant concentration, but also by the pollutant composition.
The operating principle of the waste air cleaning method is based on the technical realization of photo-oxidative
reactions for decomposing organic solvents and odours. The driving force for this is UVC light. Utilization of a
catalyst increases the effectiveness of the oxidation reactions.
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1. Polluted air 2. Aerosol filter 3. Photo-oxidation 4. Catalytic-oxidation 5. Ventilator 6. Clean, odourless air |
Photo-oxidation
The polluted waste air is at first fed through an aerosol filter to intercept particles, droplets or grease. The
pre-filtered air reaches the reaction channel in which the UV radiation triggers the chemical reaction. The odour and
pollutant molecules are activated via the absorption of light wavelengths of less than 280 nm and decomposed by
“activated oxygen”, an oxidative reaction gas. “Activated oxygen” is used here as a collective term for the reactive
oxygen compounds created during the photo-oxidation process. These are actually oxygen radicals, hydrocarbon radicals
and ozone molecules, i.e. a mixture of gaseous oxidants. Due to their increased energy and charge state these species
are chemically highly reactive and seek to combine with oxidizable molecules, such as organic and inorganic odours and
pollutants.
Catalytic oxidation
Downstream of the photo-oxidation is a catalyst which increases the efficiency of the photo-oxidation process. Due to
the fixation of the pollutant molecules on the catalyst surface, the previously created “activated oxygen” can easily
reach the absorbed pollutant molecules and initiates radical decomposition of the pollutants. Furthermore, the catalyst
ensures decomposition of excess ozone.
Phoenix Compact If the waste air contains pollutant components which are especially difficult to oxidize, then newly developed Phoenix Compact Module is integrated in the Phoenix system. The heart of the innovation is the honeycombed reaction channels coated with a photocatalyst.
The polluted waste air is "forced" through the honey-combed reaction channels to ensure that there is intensive interaction of the UV irradiation with the waste gas. The catalyst coating of the honeycomb walls provides large reaction surfaces in direct proximity to the UV irradiation. The UV irradiation of the photocatalyst generates additional activated oxygen at the photocatalytic surface, which helps to support the decomposition of pollutants.
This combination of the Phoenix Compact Module with classic Pheonix technology results in a further increase in efficiency.
