Patent ID: 6083389
Filing Date: 2000-07-04
Classification: B03D,C02F

Abstract:
A flotation device comprising a flotation tank having a bottom wall and a side wall an intake installation (1) for feeding waste water and air into a lower portion of the tank, means defining a flocculation section (2) which comprises a generally open topped cone shaped member, a laminating section (3) at the top of the flocculation section (2) which comprises a plurality of equiaxial divergent circular-section members, said side wall of the flotation tank extending over said laminating section (3) for collecting a slurry above said laminating section (3) and below a scraper (8), a separating section (4) provided with a water discharge installation (5) arranged adjacent a bottom section of said side wall of the flotation tank, and a sedimentation section provided at the bottom of said separating section (4), wherein said laminating section (3) is arranged to form, on the one hand, mutually equal base areas and, on the other hand, mutually equal exit areas of the respective annuli.