Patent ID: 6780310
Filing Date: 2004-08-24
Classification: B01D,C02F,E03F

Abstract:
In a vertical holding sump, said sump having a tubular shape enclosed by a peripheral side wall and a bottom end wall, and including a circular service opening at a top end; said side wall including a first hole with an inlet end pipe inserted therein so that an inlet opening projects a little way into said sump, said side wall also including a second hole that is sized for receiving an outlet end pipe which has an outlet opening that projects into said sump; said first hole being located at about a third of sump depth down from said service opening, and said inlet end pipe being inserted in said first hole at a lateral plane angle of about 25 degrees to a tangent line that contacts a circle described by the sump side wall; said second hole being located at approximately mid-depth of said sump;a fluid filter apparatus comprising: (a) an enclosed, circular, filter channel comprising: a top disc member which is rigid, annular in shape and made from perforated stainless steel sheet; a center disc member which is identical to said top disc member in size, shape and material, and includes a cut-out portion in the peripheral surface of said center disc member; a bottom disc member which is identical to said top disc member; a first filter sheet member, having a rectangular elongated shape and made of stainless-steel non-directional screen; a second filter sheet member, having a rectangular elongated shape and made of stainless steel non-directional screen, including a screen opening located centrally; and an outlet transition pipe member; said top disc member, center disc member and bottom disc member being concentric, and each vertically spaced apart an amount equal to at least the width of the peripheral surface of said top disc member; said first filter sheet member fastened to an inner peripheral surface edge of each disc member, forming a vertical cylindrical screen wall at the center of said filter channel; said second filter sheet fastened to an outer peripheral surface edge of each disc member, forming a second vertical cylindrical screen wall surrounding said filter channel; said second filter sheet fastened so that said screen opening is located immediately opposite said cut-out portion in said center disc member; said outlet transition pipe member fastened to said second filter sheet around said screen opening; (b) an annular rim member that is fastened normal to said second vertical screen wall surrounding said filter channel, at a point abutting an outer peripheral edge of said top disc member; forming an outward extending rim; said rim member made of rigid, flat stainless steel non-directional screen, said rim member having a center opening diameter sized to fit closely over said top disc member, and having an outer diameter sized to fit horizontally in said sump with little clearance; (c) a cylindrical baffle made of stainless steel non-directional screen sheet; said baffle hanging concentrically under said filter channel, fastened to said bottom disc member; (d) a plurality of metal support straps which are fastened vertically to said second vertical screen wall around said filter channel, and also fastened to the disc members for stiffening purposes; said straps each including a hole near a top end for a fastening bolt; and (e) first means for adjusting inlet fluid velocity; said first means located inside said sump, adjacent to said inlet opening; said filter channel and appendages being supported inside said sump by said straps which are bolted to said side wall of the sump, with said top disc member located a little below said inlet opening, so that inlet fluid will impinge directly on top of said filter channel; said filter channel rotated, with said outlet transition pipe member being situated in line with said second hole in said sump for connection to an outlet end pipe.