Carrier medium for separating paint overspray
OwnerChristian Koltinventor
Life of this patent
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Abstract
The invention relates to the use of a water-based carrier medium for wet scrubbing paint overspray from the circulating air in painting booths, the carrier medium containing at least 40 wt. % of polyfunctional organic oxo compounds. The carrier medium is characterized in that the viscosity thereof is within a specified range over a wide range of shear stresses, such that the carrier medium flows off of the separating surfaces of a wet scrubbing facility in a temporally homogeneous and approximately laminar manner. In a further aspect, the invention relates to a method for wet scrubbing using the aforementioned carrier medium.
Claims16
A method of wet scrubbing paint overspray from circulating air comprising steps of:
- i) providing a water-based agent comprising more than 40 wt. % of polyfunctional organic oxo compounds as a carrier medium for carrying paint overspray;
- ii) contacting a separating surface with the carrier medium by flowing the carrier medium over the separating surface, the carrier medium flowing off of the separating surface in an approximately laminar manner, such that there is a homogeneous wet film thickness over the entire separating surface around which the carrier medium flows,
- iii) transporting paint overspray together with circulating air along the separating surfaces contacting the carrier medium with paint overspray thereby transferring paint overspray into the carrier medium;
- the water-based agent being selected such that at a range of shear rates of from 10 to 1,000 s-1, the water-based agent has a viscosity that is always greater than 10 mPas and the ratio of static viscosity η10 to process viscosity η100 is no greater than 10:1.
The method according to claim 9, wherein the paint overspray is electrostatically charged in the ambient air under the action of a voltage in an electric field and is transported toward the separating surface in the electric field.
A method for separating paint overspray from the ambient air, comprising steps of:
- i) guiding paint overspray, together with ambient air, on a separating surface wetted with a carrier medium comprising water and more than 40 wt. % of polyfunctional organic oxo compounds, such that the paint overspray is absorbed by the carrier medium;
- and
- ii) a part of the carrier medium that has absorbed the paint overspray from the ambient air is removed from the separating surface and is, at the same time, replaced by another part of the same carrier medium that differs from the removed part merely in that it contains less paint overspray in the same volume;
- wherein the carrier medium has a viscosity greater than 10 mPas, at shear rates in a range of from 10 to 1,000 s−1, and has a ratio of static viscosity η10 to process viscosity η100 that is no greater than 10:1.
Dependencies are inferred from the claim text.