Surface treatment plant and a method of ventilating same
AssigneeFlakt Aktiebolag
InventorLeif Josefsson
Life of this patent
Estimating the term…
Abstract
A paint spray booth enclosure has separate zones defined by air curtains, one zone being polluted differently than another. A separate flow of ventilating air is passed through each zone. Each zone has its own separator for cleaning exiting air of its pollutant. In the illustrated embodiments, the outer zones have dry separators and the central zone has wet separator. Suitable conduits permit total or partial recirculation of the cleaned air, or total exhaust of the air to the atmosphere. Fresh outside air may be supplied to the ventilating flows along with spent ventilating air from the plant. Suitable controls for the air are provided.
Claims11
A paint spray booth having an enclosure in which spray painting is effected, said enclosure having a ceiling providing a plenum chamber above said ceiling, openings through /said ceiling admitting ventilating air into said enclosure from said chamber, and partition means dividing said chamber into passageways and into the enclosure, said enclosure having a floor underlying said ceiling with a plurality of air exit means associated therewith, means adjacent the partition means to provide at least one curtain of air to partition the enclosure into at least two separate zones extending over at least part of the enclosure, said curtain extending from the ceiling adjacent said /partition means to the floor whereby each zone is supplied with air from a separate passageway, the air in one zone being polluted differently than the air in the other zone, a first of said plurality of exit means being at one side of said curtain to receive air from said one zone, a second of said plurality of exit means being at the other side of said curtain to receive air from said other zone, the ventilating air passing through each zone of the enclosure entraining the pollutant in said zone, a first separator means having a first fan means communicating with said first air exit means of the floor for receiving the ventilating air discharged from said one zone and adapted to separate the air and the pollutant discharged from that zone, and a second separator means having a second fan means communicating with said second exit means for receiving the ventilation air discharged from the other zone and adapted to separate the air and the pollutant discharged from that zone, said one zone being more heavily polluted with paint particles than the other zone, the first separator means being a wet separator and the second separator means being a dry separator.
A method of ventilating a paint spray booth having an enclosure in which spray painting is effected, said enclosure having a ceiling and a floor, comprising supplying ventilating air to the ceiling of the enclosure, providing at least one curtain of air extending between the ceiling and the floor to partition the enclosure into at least two separate zones extending over at least part of the enclosure, one zone adapted for effecting said painting and being more heavily polluted with paint particles than a second zone, said second zone adapted to be without direct paint spray, passing ventilating air through each zone in the enclosure from ceiling to floor to entrain the pollutant in said zone, providing a first exit slot adjacent said floor at one side of the curtain with at least one plate inclined toward an exit slot, and flooding said plate with water to intermix with air and pollutant from said one zone and to pass air and pollutant from said one zone to a first separator means having a first fan means in which the air and the pollutant from that zone are separated, providing a second exit in said floor at the other side of said curtain to pass into a second separator means having a fan means in which the pollutant from said second zone is separated from the exhaust air, and using the separated air from the second separator means for passing through said one zone.
A paint spray booth having an enclosure in which spray painting is effected, said enclosure having a ceiling providing a plenum chamber above said ceiling, openings through said ceiling admitting ventilating air into said enclosure from said chamber, and partition means dividing said chamber into separate passageways, means to supply ventilating air to said passageways and into the enclosure, said enclosure having a floor underlying said ceiling with a plurality of air exit means associated therewith, means adjacent the partition means to provide at least one curtain of air to partition the enclosure into at least two separate zones extending over at least part of the enclosure, said curtain extending from the ceiling adjacent said partition means to the floor whereby each zone is supplied with air from a separate passageway, the air in one zone being polluted differently than the air in the other zone, a first of said plurality of exit means being at one side of said curtain to receive air from said one zone, a second of said plurality of exit means being at the other side of said curtain to receive air from said other zone, the ventilating air passing through each zone of the enclosure entraining the pollutant in said zone and a first separator means having a first fan means communicating with said first air exit means of the floor in each zone for receiving the ventilating air discharged from said one zone and adapted to separate the air and the pollutant discharged from that zone, and a second separator means having a second fan means communicating with said second exit means for receiving the ventilating air discharged from the other zone and adapted to separate the air and the pollutant discharged from that zone, one zone being arranged to confine paint spray therein so as to be heavily polluted with paint particles, and the other zone being without direct paint spray so as to be less heavily polluted than the one zone, the second separator means being a dry separator, and including means to recirculate air from said dry separator to the ventilating passageway above the ceiling of said one zone.
Dependencies are inferred from the claim text.