Patents Assigned to Hydrotech Veolia Water Systems Aktiebolag
  • Publication number: 20100032388
    Abstract: A rotary disc filter device comprises a rotary drum and a plurality of disc-shaped filter members secured about the drum. Each disc-shaped filter member has a filtering material disposed on the outside thereof. A guide bar extends longitudinally across the disc-shaped filter members and has a movable carriage mounted thereon. One or more nozzles are operatively connected to the carriage for delivering cleaning fluid onto the filtering materials. The guide bar is rotates between a cleaning position and an adjustment position. When the guide bar is in the cleaning position, the nozzle is disposed adjacent to one of the disc-shaped filter members such that the nozzle is positioned to deliver cleaning fluid onto the filtering material. When the guide bar is in the adjustment position, the carriage is movable along the guide bar without interference from the disc-shaped filter members.
    Type: Application
    Filed: February 21, 2008
    Publication date: February 11, 2010
    Applicant: HYDROTECH VEOLIA WATER SYSTEMS AKTIEBOLAG
    Inventor: Ake Ralvert
  • Publication number: 20100012570
    Abstract: A rotary disc filter device includes a rotary drum and one or more disc-shaped filter members secured about the drum. Each disc-shaped filter member includes a filter disposed on opposite sides thereof and each disc-shaped filter member includes a modular frame made up, in part at least, by a series of interconnected modules. One module of the modular filter frame includes a base that is secured to the rotary drum and a support projecting outwardly from the base. A series of these modules are interconnected to form a modular filter frame.
    Type: Application
    Filed: September 30, 2009
    Publication date: January 21, 2010
    Applicant: HYDROTECH VEOLIA WATER SYSTEMS AKTIEBOLAG
    Inventors: Åke Danielsson, Åke Ralvert, Emil Svensson, Per Larsson
  • Patent number: 7597805
    Abstract: A rotary disk filter and a module for building a filter support for a rotary disk filter are disclosed. The rotary disk filter may comprise a drum, which is rotatable about its central longitudinal axis. The rotary disk filter may be adapted to receive a liquid which is to be filtered. In one implementation, the rotary disk filter may comprise at least one disk-shaped filter member which on the outside of the drum extends outwards in the transverse direction of the drum, and which has a filter support and at least one filter portion supported thereby. A first liquid duct may extend from the drum through the filter member and out through the filter portion. The filter portion may be made of filter segments, which are detachably secured to the filter support. At least one second liquid duct may extend between adjoining filter segments to provide liquid communication between the filter segments.
    Type: Grant
    Filed: February 24, 2004
    Date of Patent: October 6, 2009
    Assignee: Hydrotech Veolia Water Systems Aktiebolag
    Inventors: Åke Danielsson, Åke Ralvert, Emil Svensson, Per Larsson