Abstract:
An apparatus for extracting sludge from a rectangular sewage flotation tank comprises a bridge structure having rotatably mounted thereon a horizontal drum driven for rotation and provided with suitably shaped vanes, the direction of rotation of the drum and vane assembly being such that at the point of contact thereof with the scraped surface the direction of its velocity vector is opposed to the direction of travel of the bridge structure. The bridge structure also includes a suitably shaped scraper blade pushing the sludge continuously towards the front of the movable vanes of the drum, whereby the extracted sludge is fed to a discharge device mounted inside the tubular shaft of the drum and provided with means for directing the sludge into a container secured to the bridge.
Abstract:
Sludge recovery device in the circular settling tanks used for water purification, characterized in that it comprises a rotating mobile bridge in which the sludge is sucked into an area integral with the bridge and evacuated by a channel located in the central column of the container decanting that is composed of a siphon that sucks sludge from the enclosure towards the evacuation canalization; the power supply means of the system ensure the rotation of the bridge and pass to the interior of the rod located below the siphon in a position coaxial to the latter in a sleeve or tube, means being provided to ensure the airtightness between the system that ensures the rotation of the bridge, the sleeve or tube for bringing the energy supply means of this system and the siphon itself. (Machine-translation by Google Translate, not legally binding)