Exhaust air purification in drying processes after painting and coating
Reliable neutralization of VOCs with UV-ozone systems from oxytec – energy-efficient, retrofittable, approval-compliant
After painting, coating, or gluing, workpieces are dried in tunnels, chambers, or ovens. During this process, large quantities of solvents and volatile organic compounds (VOCs) evaporate from paints, varnishes, primers, or adhesives. These pollute the exhaust air considerably, are harmful to health, often flammable (ATEX), and lead to odor problems or approval requirements.
oxytec offers compact, powerful UV ozone systems for exhaust air purification in dryers – as an alternative or supplement to thermal post-combustion or activated carbon filters. This allows you to meet all relevant requirements – economically, safely, and in an environmentally friendly manner.
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Typical emissions from drying processes
| Process example | Typical VOCs / emissions | Special features |
|---|---|---|
| Drying of paints (solvent-based) | Xylene, ethyl acetate, glycol ether | High VOC load, diffuse outgassing, ATEX-relevant |
| Drying of adhesives (e.g., PU, acrylic) | MEK, toluene, acetone | Strong odor, toxic, volatile |
| UV/radiation drying | Acrylates, ozone, photoinitiators | Low air volume, strong odor |
| Powder coating (chamber exhaust air) | Solvent residues from pretreatment/painting | High temperature, VOC mixtures |
| Infrared/hot air dryers | VOCs, water vapor, possibly additives | Combination of moisture and volatile substances |
Why is VOC neutralization in dryer exhaust air so important?
VOCs are harmful to health, flammable, and strictly regulated.
Solvent residues can create explosive atmospheres (ATEX).
Odors lead to complaints and restrictions.
TA Luft, VOC Directive, 31. BImSchV prescribe emission reduction.
Drying exhaust air is often difficult to treat with activated carbon – too hot, too humid, or too quickly contaminated.
With Oxytec, you can clean your exhaust air efficiently and without leaving any residue – even with high contamination levels.
Legal requirements
- TA Luft (2021): Limit values for VOCs, organic emissions, odors
- 31. BImSchV: Obligation to reduce VOCs from 2 t VOC/year
- VOC Directive 2010/75/EU: Requirements for diffuse emissions and minimization measures
- ATEX requirements: for flammable solvents in heated exhaust air
- GIRL (Odor Emission Directive): for plants located near residential areas
Oxytec provides approvable, measurable, and permanently effective solutions.
Request a consultation now – for clean dryer exhaust air after painting
Would you like to neutralize VOCs safely and efficiently—without TNV and without complex filter technology?
Can be used in many industries
Metalworking (vehicle parts, machine components)
Wood and furniture industry (panels, edges, fronts)
Plastics processing (household goods, films, displays)
Printing and packaging industry (lamination, flexographic printing, gravure printing)
Electronics & glass (displays, circuit boards, glass decoration)
Laminate, paper, labels (coating, embossing, varnishes)
Your advantages with oxytec
Effective VOC neutralization without thermal combustion
Low maintenance, compact, energy-efficient
Ideal for existing systems – retrofittable & scalable
No impact on drying process or product quality
Support with approvals, expert reports, and subsidies
