| 摘要 |
<p>The invention concerns a device for stirring and aerating a liquid and eliminating the foam in a vat for treating this liquid. The device comprises a vertical casing (11) extending over part of the height of the vat (1), a funnel (14) arranged around the upper part of the casing (11), a first series of windows (17) provided in the upper part of the casing (11), a second series of windows (18) provided in the casing (11) above the base of the funnel (14), a vertical shaft (19) arranged inside the casing (11), a helix (20) fixed at the free end of the shaft (19), beneath the base of the funnel (14), an anti-vortex device (24) arranged inside the casing (11), beneath said helix (20), means (25) for regulating the level of liquid in the funnel (14) and means (33) for injecting pressurised gas in to the casing (11). The invention is applicable for instance to the treatment of greasy waste extracted from urban effluents of waste water or of agro-industries.</p> |
