Slurry filter apparatus with means to direct slurry to filter face at an angle

Claim 2

A slurry filter apparatus, comprising: a first chamber having a slurry inlet and a recirculation outlet respectively arranged so as to direct a flow of slurry into and out of said first chamber; a second chamber having a filtrate outlet; a rotatably mounted filter separating said first and second chambers, means for flowing slurry to said slurry inlet from a slurry tank; means for ejecting the flow of slurry under pressure from said slurry inlet so as to strike a face of said filter at a predetermined angle so as to be non-tangential to the face of said filter; and means for returning unfiltered slurry from said first chamber through said recirculation outlet to said slurry tank.

Claim 3

A slurry filter apparatus according to claim 1, wherein: an axis of direction of slurry inlet flow is aligned to be not more than 30° measured outwardly from a tangent at the face of the filter where the flow of slurry from said slurry inlet strikes the face of the filter.

Claim 4

A slurry filter apparatus according to one of claim 1, further comprising: means for directing the flow of slurry ejected from said slurry inlet against a deflector disposed to deflect said flow of slurry toward the face of the filter.

Claim 5

A slurry filter apparatus according to claim 1, further comprising: restricting mans for restricting an area of said first chamber available to the flow of slurry.

Claim 6

A slurry filter apparatus comprising: a first chamber for receiving slurry; a second chamber for collecting filtrate from said slurry; a curved filter having a convex surface separating said first and second chambers; means comprising a recirculation outlet located in said first chamber for retrieving unfiltered slurry form said first chamber; means for conveying filtrate from said second chamber; and means comprising a plurality of inputs located in said first chamber for directing slurry under pressure to strike predetermined points on said convex surface of said filter at predetermined non-tangential angles, said plurality of inputs directing said slurry to said filter from different directions.

Claim 7

A slurry filter apparatus comprising: a first chamber for receiving slurry; a second chamber for collecting filtrate from said slurry; a curved filter having a convex surface separating said first and second chambers; means comprising a recirculation outlet located in said first chamber for retrieving unfiltered slurry form said first chamber; means for conveying filtrate from said second chamber; and means comprising a plurality of inputs located in said first chamber for directing slurry under pressure to strike predetermined points on said convex surface of said filter at predetermined non-tangential angles, said plurality of inputs directing said slurry to said filter from different directions.

Claim 8

A slurry filter apparatus, comprising: a first chamber having a slurry inlet and a recirculation outlet respectively arranged so as to direct a flow of slurry into and out of said first chamber; a second chamber having a filtrate outlet; a filter separating said first and second chambers, means for flowing said slurry to said slurry inlet from a slurry tank; means for ejecting the flow of slurry under pressure from said slurry inlet so as to strike a face of said filter at a predetermined angle so as to be non-tangential to the face of said filter; and means for returning unfiltered slurry from said first chamber through said recirculation outlet to said slurry tank, wherein said filter comprises a rotatable cylinder.

Claim 9

A slurry filter apparatus, comprising: a first chamber having a slurry inlet and a recirculation outlet respectively arranged so as to direct a flow of slurry into and out of said first chamber; a second chamber having a filtrate outlet; a filter separating said first and second chambers, means for flowing said slurry to said slurry inlet from a slurry tank; means for ejecting the flow of slurry under pressure from said slurry inlet so as to strike a face of said filter at a predetermined angle so as to be non-tangential to the face of said filter; and means for returning unfiltered slurry from said first chamber through said recirculation outlet to said slurry tank, wherein said filter comprises a rotatable cylinder.

Claim 10

A slurry filter apparatus, comprising: a first chamber having a slurry inlet and a recirculation outlet respectively arranged so as to direct a flow of slurry into and out of said first chamber; a second chamber having a filtrate outlet; a filer separating said first and second chambers, means for flowing said slurry to said slurry inlet from a slurry tank; means for ejecting the flow of slurry under pressure from said slurry inlet so as to strike a face of said filter at a predetermined angle so as to be non-tangential to the face of said filter; and means for returning unfiltered slurry from said first chamber through said recirculation outlet to said slurry tank, wherein said filter comprises a rotatable disc.

Claim 11

A slurry filter apparatus, comprising: a first chamber having a slurry inlet and a recirculation outlet respectively arranged so as to direct a flow of slurry into and out of said first chamber; a second chamber having a filtrate outlet; a filer separating said first and second chambers, means for flowing said slurry to said slurry inlet from a slurry tank; means for ejecting the flow of slurry under pressure from said slurry inlet so as to strike a face of said filter at a predetermined angle so as to be non-tangential to the face of said filter; and means for returning unfiltered slurry from said first chamber through said recirculation outlet to said slurry tank, wherein said filter comprises a rotatable disc.

Claim 12

A slurry filter apparatus, comprising: a first chamber having a slurry inlet and a recirculation outlet respectively so as to direct a flow of slurry into and out of said first chamber; a second chamber having a filtrate outlet; a filter separating said first and second chambers, means for flowing said slurry to said slurry inlet from a slurry tank; means for ejecting the flow of a slurry under pressure from said slurry inlet so as to strike a face of said filter at a predetermined angle so as to be non-tangential to the face of said filter; means for returning unfiltered slurry from said first chamber through said recirculation outlet to said slurry tank; and a plunger pump arranged for pumping slurry to said slurry inlet under pressure, said plunger pump having a cylinder with a side relatively nearer said first chamber a valve and a valve seat, said valve and said valve seat being made of wear-resisting material, a group of packings made of wear-resisting resilient resisting material and placed at the cylinder chamber side, and another group of packings, said groups of packings being installed on a wall of said cylinder.

Claim 13

A slurry filter apparatus, comprising: a first chamber having a slurry inlet and a recirculation outlet respectively so as to direct a flow of slurry into and out of said first chamber; a second chamber having a filtrate outlet; a filter separating said first and second chambers, means for flowing said slurry to said slurry inlet from a slurry tank; means for ejecting the flow of a slurry under pressure from said slurry inlet so as to strike a face of said filter at a predetermined angle so as to be non-tangential to the face of said filter; means for returning unfiltered slurry from said first chamber through said recirculation outlet to said slurry tank; and a plunger pump arranged for pumping slurry to said slurry inlet under pressure, said plunger pump having a cylinder with a side relatively nearer said first chamber a valve and a valve seat, said valve and said valve seat being made of wear-resisting material, a group of packings made of wear-resisting resilient resisting material and placed at the cylinder chamber side, and another group of packings, said groups of packings being installed on a wall of said cylinder.

Claim 14

A slurry filter apparatus according to claim 8, wherein said wear-resisting resilient material includes urethane resin.

Claim 15

A slurry filter apparatus according to claim 9, wherein said another group of packings is formed of nitrile-butadiene rubber, and said first group of packings are placed closer to said slurry inlet than said another group of packings.

Claim 16

A slurry filter apparatus according to claim 8, wherein said valve and said valve seat are each formed as composites by shrink fitting of wear-resisting means.

Claim 17

A slurry filter apparatus according to claim 8, wherein said valve and valve set wear resisting material comprises a first wear-resisting material shrink fitted around a second wear-resisting material, said first wear-shrinking material being composed of stainless steel and said second wear-resisting material being composed of a material selected from the group consisting of alumina and ceramic.