Filtration apparatus
AssigneeNational Research Development Corporation
InventorDerek B. Purchas
Life of this patent
Estimating the term…
Abstract
Filtration apparatus in which the filter medium is mounted at a slope with respect to the horizontal and in which there are means to vibrate the medium in a horizontal direction to assist the cleaning of the medium. A single chamber may contain many sheets of media, one version of the apparatus comprises a plurality of separate modular structures each containing at least one filter medium and in another version modular structures are so designed that they assemble into a stack and when so assembled form the necessary conduits by which each filter medium communicates with the necessary inlets and outlets for the relevant materials.
Claims9
Apparatus for filtering and separating a solid from a fluid comprising:
- a chamber,
- an inlet to said chamber for a solid-bearing fluid,
- a solids outlet from said chamber for collected solids;
- a plurality of filter units mounted and arranged within said chamber in parallel between said inlet and said solids outlet,
- each such filter unit being a box-like structure comprising walls enclosing a hollow interior, at least one wall being formed by a sheet of filter medium and the remainder of said walls preventing access of said solid-bearing fluid to the interior of said structure,
- each filter unit having an outlet communicating from the interior thereof for discharging the filtered fluid;
- means for removing the filtered fluid from the interior of said filter units,
- said sheets of filter medium presenting a first surface facing outward into said chamber, a second surface facing inward into said hollow interior,
- said sheets of filter medium being set at an angle of slope to the horizontal and arranged so that fluid passes through the thickness of each said sheet from said first surface thereof to said second surface, leaving substantially all filtered solids retained on said first surface,
- means to vibrate said filter units, the vibrations assisting to dislodge the retained solids from said first surfaces of said sheets of filter medium,
- said sheets of filter medium being sloped such as to have one end adjacent said solids outlet, and
- said plurality of filter units being arranged such as to define paths for sliding gravity travel of said dislodged solids towards said solids outlet whereby said solids travel by gravity while substantially avoiding solids rising appreciably into the atmosphere of said chamber.
Apparatus for filtering and separating a solid from a fluid comprising:
- a chamber,
- an inlet to said chamber for a solid-bearing fluid,
- an outlet from said chamber for filtered fluid,
- a solids outlet from said chamber for collected solids;
- a plurality of filter units mounted, stacked and arranged within said chamber in parallel in fluid communication with said inlet and said filtered fluid outlet,
- each said filter unit being a box-like structure comprising walls enclosing a hollow interior, at least one wall being formed by a sheet of filter medium and the remainder of said walls preventing access of said solid-bearing fluid to the interior of said structure,
- said sheets of filter medium presenting a first surface facing outward, a second surface facing inward into said hollow interior,
- means providing communication between each of said filter units and said outlet,
- said sheets of filter medium being set at an angle of slope to the horizontal and arranged so that fluid passes through the thickness of each said sheets from said first surface thereof to said second surface, leaving substantially all filtered solids retained on said first surface,
- means to vibrate said filter units, the vibrations assisting to dislodge the retained solids from said first surfaces of said sheets of filter medium,
- said sheets of filter medium being sloped such as to have one end adjacent said solids outlet, and
- said plurality of filter units being arranged such as to define paths for sliding gravity travel of said dislodged solids towards said solids outlet whereby said solids travel by gravity while substantially avoiding solids rising appreciably into the atmosphere of said chamber.
Dependencies are inferred from the claim text.