Industrial gas scrubbers

Hoe werkt een gaswasser?

Het afgas stroomt door een kolom en komt daar in nauw contact met een wasvloeistof. De verontreinigingen gaan over van de gasfase naar de vloeistof, waar ze worden omgezet niet-vluchtige verbindingen.

Een gaswasser bestaat uit drie hoofdonderdelen:

  • een absorptiekolom, meestal met pakking voor een groot contactoppervlak;
  • een druppelvanger bovenaan, die meegesleurde druppels tegenhoudt;
  • een recirculatietank met pomp, dosering van chemicaliën en afvoer van spuiwater.

De automatische regeling op pH, redoxpotentiaal (ORP) en geleidbaarheid houdt het rendement stabiel en beperkt het verbruik van chemicaliën.

Welke gaswasser voor welke stof?

Verontreiniging Type gaswasser Wasvloeistof
Ammoniak en amines Zure wasser Zwavelzuur
Ethyleenoxide (EtO) en epoxiden Zure wasser of Smart wet scrubber Zuur, of water met katalysator
Zure gassen (HCl, HF, SO₂), H₂S Loogwasser Natronloog (NaOH)
Geur, H₂S, formaldehyde, NOₓ Oxidatieve wasser Natriumhypochloriet, waterstofperoxide of ozon
Chloor, broom Reductieve wasser Water + reductiemiddel
Goed oplosbare stoffen (alcoholen, ketonen, HCl) Waterwasser Vers water of dual-loop
VOC, gehalogeneerde verbindingen, aldehyden Solvent wasser Organisch oplosmiddel
3 units of 3-stage ethylene oxide EtO/EO steriliser gas scrubbers in production at Teblick Plastic Constructions & Installations

Acid scrubber

An acid scrubber is a proven air pollution control technique for removing volatile nitrogen compounds and epoxides from gas streams. By transferring these components into an acidic liquid phase, they are converted into non‑volatile salts or compounds, enabling very high removal efficiencies.

Acid scrubber
Smart Wet Scrubber for ethylene oxide removal from waste gas streams

Smart wet scrubber

The Smart Wet Scrubber is an advanced air pollution control system designed for the safe and efficient removal of ethylene oxide (EtO) from waste gas streams. By combining water‑based scrubbing with catalytic conversion, the system delivers very high performance without the use of strong acids.

Smart wet scrubber
A water scrubber is a straightforward and effective air pollution control technique for absorbing soluble gases from exhaust streams.

Water scrubber

A water scrubber is a straightforward and effective air pollution control technique for absorbing soluble gases from exhaust streams. The system uses fresh water or a dual‑loop configuration to remove compounds with a moderate to high water solubility.

Water scrubber
Caustic scrubber for H₂S, acidic gases and acrylates

Caustic scrubber

A caustic scrubber is an effective air pollution control technology for removing acidic gases, sulphur compounds and specific organic components from exhaust streams. The system operates under alkaline conditions, converting volatile compounds into stable, non‑volatile salts.

Caustic scrubber
Oxidative scrubber for H₂S, formaldehyde and NOₓ removal

Oxidative scrubber

An oxidative scrubber is an air pollution control system that removes specific gaseous pollutants through chemical oxidation. Using oxidants such as sodium hypochlorite, hydrogen peroxide or ozone, volatile compounds are converted into less harmful substances with very high removal efficiencies.

Oxidative scrubber
Reductive scrubber for bromine and chlorine removal from industrial air streams

Reductive scrubber

Reductive gas scrubbing enables the efficient removal of halogenated compounds such as bromine and chlorine from industrial air streams. Through absorption in water followed by chemical reduction, and supported by automated control of ORP, pH and conductivity, the system ensures stable performance, optimised chemical use and reliable emission control.

Reductive scrubber
Solvent scrubber for VOCs, halogenated compounds and aldehydes

Solvent scrubber

Solvent scrubbing offers an effective solution for the removal of VOCs, halogenated compounds and aldehydes that cannot be treated efficiently through conventional acid, caustic, oxidative or reductive scrubbing. Depending on the pollutant, the process relies on selective absorption or amine-based reactions, supported by pH and conductivity control to optimise kinetics and chemical consumption.

Solvent scrubber

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Trevi environmental specialist advising a client on air treatment compliance