US 5,264,014 AGranted

Arrangement for cleaning ventilation air polluted with paint particles

AssigneeABB Flakt Aktiebolag

InventorsHans Lannefors, Leif Lindau, Mikael Kihlbert

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Abstract

An arrangement for cleaning ventilation air coming from a paint spray booth and polluted with paint particles is provided with a liquid flow for separating part of the paint particles from the ventilation air and a wet electrostatic precipitator for separating any remaining paint particles and liquid droplets from the ventilation air. The electrostatic precipitator is located in an enclosure underneath the floor of the spray booth, with a surface of the enclosure being poured over with the liquid flow to remove part of the paint particles. The enclosure is further designed so that the ventilation air from the spray booth is caused to be deflected through an angle of 10.degree.-170.degree. in relation to the substantially vertical direction of flow through the spray booth before passing through the liquid flow and into the electrostatic precipitator.

Claims20

Dependent claims

Arrangement for cleaning ventilation air coming from a spray painting booth and polluted with paint particles, the ventilation air flowing substantially vertically through the spray booth, said arrangement comprising means for contacting the ventilation air with a liquid flow for separating part of the paint particles of the ventilation air, there being provided downstream of said contacting means at least one electrostatic precipitator provided in an enclosure for separating the remaining particles as well as liquid droplets contained in the ventilation air and originating from said liquid flow, wherein the enclosure is located underneath a floor of the spray booth, the enclosure comprising a sloping surface which is first contacted by the ventilation air and means for pouring a liquid over the sloping surface and said contacting means, the sloping surface being poured over with liquid, the sloping surface having a lower end, the lower end of the sloping surface being connected to said contacting means forming a part of said enclosure and being poured over with liquid, and the enclosure being configured for causing the ventilation air to be deflected through an angle of 10.degree.-170.degree. in relation to its substantially vertical direction of flow through the spray booth before being caused to pass through said contacting means.

A fire and explosion proof arrangement for cleaning ventilation air containing pollutants, the ventilation air for removing the pollutants from a first chamber to be ventilated, the arrangement comprising:

means for moving the polluted ventilation air through the cleaning arrangement;
means for contacting the polluted ventilation air with a liquid flow to remove at least a first portion of pollutants from the ventilation air;
and
electrostatic separator means for removing an additional portion of pollutants from the ventilation air;
said means for contacting being disposed substantially adjacent the first chamber, and the means for contacting comprising:
at least a first surface disposed to allow a flow of liquid to flow over said first surface, the flow of liquid for removing at least a portion of the pollutants from the ventilation air upon contact of the polluted ventilation air with the flow of liquid thereby producing at least partially purified ventilation air;
said first surface comprising a plurality of openings therethrough to allow passage of the polluted ventilation air through the first surface and the flow of liquid;
and
means for flowing the flow of liquid over said first surface;
and
said at least a first surface comprises a surface of an enclosure means, the enclosure means for enclosing the electrostatic separator means, and the enclosure means for being located in a second chamber underneath the first chamber, the first chamber being separated from the second chamber by a floor having openings therethrough for passage of the polluted ventilation air from the first chamber to the second chamber;
said electrostatic separator means being disposed for receipt of the at least partially purified ventilation air passing from the means for contacting to remove the additional portion of pollutants from the partially purified ventilation air to produce substantially purified ventilation air;
and
said electrostatic separator being disposed in said enclosure means having liquid flowing thereover to minimize fires and explosions from said electrostatic separator.

11 more elements

Dependencies are inferred from the claim text.