Method and system for backwashing a filter

Details Method and system for backwashing a filter Method and system for backwashing a filter

2007-07-09

2011-12-06

Smith, Duane (Department: 1776)

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

C210S744000, C210S800000, C210S801000, C210S097000, C210S106000, C210S311000, C210S312000, C210S409000, C210S410000, C210S411000, C210S412000, C210S513000, C210S532100, C210S533000, C210S534000

Reexamination Certificate

active

08070963

ABSTRACT:
A method for purifying fluids and a sedimentation tank, the sedimentation tank includes: a perforated plate spaced from an upper and of the sedimentation tank dividing the sedimentation tank into an upper chamber and a lower chamber; an inlet adapted to inlet fluid into the tank; a first outlet, positioned above the perforated plate for outletting a clarified fraction of the fluid; a second outlet positioned at a bottom of the tank, for outletting a concentrated sludge fraction of the fluid; a pump; and a washing mechanism, positioned at least partially above the perforated plate; wherein the pump is adapted to provide a washing fluid to the washing mechanism when a level of fluid in the sedimentation tank is below a predefined level; and wherein the washing mechanism washes an upper surface of the perforated plate by the washing fluid.

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Search Report of PCT Patent application publication WO2009007961A3.

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