Paint spraying booths

Claim 1

In a paint-spraying booth of the type including a floor, apparatus for scrubbing paint-laden air, said apparatus comprising a water-container located beneath and spaced from the floor of the booth, air extraction means connected with exhaust ducts which extend lengthwise of and beneath the floor of the booth, at least one tube which opens through and extends downwardly from the floor and has the end thereof nearest the buttom of the water-container disposed above and spaced, when the apparatus is in use, from the level of water in the water-container, and means arranged to cause a flow of water over the floor and into said tube, the end of the tube nearest the bottom of the water-container having associated therewith means defining an air flow-constricting opening which is co-axial with the tube, said opening being substantially parallel to the bottom of the water container, and a baffle positioned between said air flow-constricting opening and the bottom of the water-container and spaced from each thereof in substantially parallel relationship with the air flow-constricting opening and the bottom of the water-container, said baffle being substantially co-axial with the air flow-constricting opening and having a plurality of perforations extending therethrough, said perforations being small as compared with said air flow-constricting opening, the arrangement being such that in use of the apparatus the baffle provides by impingement thereon a first stage separation of paint particles from entraining air, and water in the water-container immediately below the baffle providing by impingement thereon of paint entraining air which passes through the baffle perforations a second stage separation, and an annular curtain of flowing water formed between the end of the tube nearest the bottom of the water-container and the surface of water in the water-container providing a third stage separation by the lateral passage of paint entraining air therethrough.