ES374024A1 - A centrifugal device for wastewater slides. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

In a sludge centrifuge comprising a rotating drum 11 containing a separation chamber 31 and a conveyor worm 18 rotatably mounted coaxially to the drum and outside the chamber 31 for removing separated solids and rotating at a speed different from that of the drum, the chamber 31 has at one end thereof one or more openings 36 for the discharge of centrifuged liquid and the entrance for the sludge into the separation chamber 31 is at the end of the chamber opposite the end thereof containing the opening or openings 36 and is constituted by a helical passage 55 defined between the turns of a helical feed worm 53 coaxial with the drum 11 and running in a chamber 51 outside the separation chamber 31. The drum 11 is mounted on a hollow shaft driven through a pulley 16. The shaft 15 may be extended right through the drum. The hub 17 of the conveyor worm 18 is mounted on a hollow shaft 20 driven through a pulley 21 at a speed different from that of shaft 15 where by the worm 18 conveys the separated solids to an exit opening 22. The sludge is fed through a conduit 24 and a channel 25 in the shaft 26 and escapes through openings 26 in the shaft 20 into a chamber 51 formed within the hub 17. The openings 26 may, as shown, lead through a coupling 27 joining two portions of the shaft 20. Alternatively, the shaft 20 is through-going. A solution or suspension of chemicals for facilitating separation is fed through a conduit 29 and a channel 28 in the shaft 20 through openings 30 into the chamber 51. The hub 34 of the feed worm 53 may be mounted on the shaft 15, as shown, or on a third shaft rotating at a speed different from both that of the shaft 15 and that of the shaft 20. The pressure of the feed worm 53 causes a turbulence-free flow of the sludge to the separation chamber.