Chemistry

Compact course adsorption

Compact course adsorption


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Adsorption wheel

The adsorption wheel was developed by the Eisenmann company in order to enable the disposal of even extremely lightly polluted exhaust air flows, which is increasingly required by the stricter environmental protection legislation.

With the adsorption wheel, the exhaust air to be cleaned is guided over the adsorbent (mostly activated carbon) on a path of only 30 to 50 cm. This is inevitably quickly exhausted and therefore has to be regenerated much more frequently than with fixed bed adsorbers. However, since the solvents have only covered very short distances in the adsorbent, desorption can also take place in a very short time. The adsorption phase of such wheels is usually around 20 to 60 minutes, while the desorption time is around 2 to 6 minutes.

Hot air with approx. 373-393 K is mostly used for desorption. After desorption is complete, the air flow is approximately tenfold, but only about a tenth of the volume of the exhaust air flow originally to be disposed of. This concentrated and minimized air flow is then fed to an incineration with heat recovery or a condensation with solvent recovery for disposal.


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