| 摘要 |
1,036,457. Rotary drum filters and sheet filters, for liquids. H. B. FEHLMANN. Sept. 24, 1963 [July 31, 1963], No. 37458/63. Heading B1D. Sludge is introduced from a I-section tank 3, 4, 5, Fig. 2, past slide valves 41, 40, Fig. 1, to the interior of a drum 14, where the residue forms a sludge roll 56 which is kept rotating on the filter cloth lining 28 by the rotation of the drum. The outer end of the roll is continuously cut away and discharged by an edge 35. Vacuum is applied to a sectionalized base structure 19, 20, by a fan 12 and pipe 11, collected water being drained from the drum hub by a pipe 53 immersed at 50. On Fig. 5 an annulus of filtering material 81 is fixed at its edges 63, 64, and is formed into a series of radial crests and troughs by an annular tray-shaped supporting structure 75, so that one set of troughs (e.g. 90) communicates with a circular feed gutter 82 while the troughs (e.g. 91) alternating therewith do not. A crest is formed between every two troughs. The structure 75 is rotated by a motor 73 and a cylinder 72 so that eventually sludge rolls 92 form and rotate in the troughs 91. The inner end of each sludge roll is continuously cut away and discharged by an edge 87. |
