GB1523459A - Air scrubber - Google Patents

Abstract

1523459 Centrifugal separators E H CUMPSTON 24 Oct 1975 43818/75 Heading B2P An air scrubber, Fig. 1 has air inlets 82, a scrubbing liquid inlet 83, a relatively low pressure chamber 79 along which the air and liquid pass and a fan 88 for forcing the air and aerosol particles helically into an annular chamber 80 of relatively high pressure, the outer wall of chamber 80 having small apertures 100 for removing aerosol particles together with entrained dust particles. Additionally slots 92-94 on the lower portion of the outer wall 77 of the chamber 80 serve to separate liquid from the air (and to recirculate part of it into the incoming air stream). A channel 95 which is adjustable in height to regulate the proportion of liquid recirculated and the proportion drained from the scrubber, is mounted on the exterior of the outer wall 77. The difference in pressure between the outer and inner chambers promotes the removal of liquid and aerosol particles. The region having the apertures 100 may be slightly roughened as by shot blasting. The rows of slots 92-94 may be replaced by two annular zones between separate wall portions of the wall 77. The zones are of toothed form, Fig. 6, and define openings which can be adjusted in size by relatively having the wall portions. The fan 88 may have concavely shaped blades and is driven by a central motor 89. The scrubber is able to remove very small particles (e.g. 0.1Á) from air.