Concentrator Systems

For large volume waste streams with very dilute levels of VOC, a concentrator may be used as pre treatment to thermal or catalytic oxidation.

 

In a concentrator system the untreated waste stream is passed through a concentrator wheel and the VOC is absorbed onto the surface of the wheel. A small hot gas stream is passed through an enclosed section of the wheel, the hot air desorbs the wheel of VOC's. Thus the mass of VOC originally contained within the original stream is now effectively concentrated.

 

A second and much smaller flow of hot air (roughly 10% of the inlet flow) is passed through a separate section of the wheel in a continuous but opposite direction. This flow desorbs the VOC from the wheel and effectively converts it into a much smaller air stream. This much smaller stream is then destroyed economically in a suitable oxidiser. The temperature produced in the oxidiser is then used to heat the desorption air.