초록 ▼

A closed, cross-flow fluid filter assembly having a pressurized input line for polluted fluids entering into a closed header box. The closed header box fits within a filter tank and is provided with apertures and spacer assemblies on the bottom wall thereof communicating with the filter tank, the ap

A closed, cross-flow fluid filter assembly having a pressurized input line for polluted fluids entering into a closed header box. The closed header box fits within a filter tank and is provided with apertures and spacer assemblies on the bottom wall thereof communicating with the filter tank, the apertures providing the pressurized fluid thereto. Filter leaf assemblies are arranged in parallel within the filter tank and are maintained at their top edges in spaced relation by the spacer assemblies. The filter leaf assemblies are composed of abutting offset grids, contained within a fluid tight frame which is covered on each side by a filter media. The filter leafs are drained of filtrate through a medial tube connected to a central manifold which is connected to a vacuum source. Flow-through backwash stop-grids are arranged in the filter tank to prevent excessive bulging of the filter membranes during backwash for cleaning of the filter media. The filter media are also cleansed by the shearing effect of the pressurized input fluid flowing over filter media faces. Unfiltered fluid passes out of the filter tank at the bottom thereof. The filter assembly is designed in modular fashion with quickly releasible parts for ease of maintenance and flexibility.

대표청구항 ▼

1. A cross flow fluid filter assembly comprising: a) a header box for receiving a fluid to be filtered under pressure, the header box having a pierced wall with apertures formed therethrough for providing fluid communication with a filter tank for delivering pressurized fluids thereto, b) a filt

1. A cross flow fluid filter assembly comprising: a) a header box for receiving a fluid to be filtered under pressure, the header box having a pierced wall with apertures formed therethrough for providing fluid communication with a filter tank for delivering pressurized fluids thereto, b) a filter tank in fluid communication with the header box; c) at least one filter leaf disposed within the tank and comprising: 1) a fluid tight frame, 2) a filter core having at least two abutting offset grids contained within the frame, 3) a drain tube within said grids, the tube having at least one aperture formed therethrough, 4) at least one filtering media sealingly covering the core, d) means for sealingly attaching the filter leaf to a filtrate manifold such that the filter leaf drain tube and filtrate manifold are in fluid communication; e) a filtrate manifold, the manifold being affixed within the filter tank, the manifold being in fluid communication with the exterior of the filter tank; f) a filtrate pump operatively attached to the filtrate manifold; g) means for draining the filter tank; wherein each of the offset grids comprises a plurality of parallel spaced apart first members aligned in a first direction, and a plurality of parallel spaced apart second members aligned in a second direction which is substantially perpendicular with respect to the first direction, the first and second members within each offset grid intersecting at a plurality of points to define intersection junctures; and wherein the intersection junctures of the abutting grids are offset from one another. 2. The fluid filter assembly according to claim 1 further comprising: a) at least one spacer fixedly attached to the pierced wall of the header box and extending into the filter tank, for maintaining the filter leaf position within the filter tank. 3. The fluid filter assembly according to claim 1 further comprising: a) a backwash tank for filtrate storage, b) means for delivering filtrate to the backwash tank, and c) means for applying filtrate from the backwash tank to backwash the filter leaf. 4. The fluid filter assembly according to claim 1 wherein the filter leaf further comprises: an air vent communicating between the interior and exterior of the filter leaf so as to allow the expulsion of air from the interior of the filter leaf. 5. The fluid filter assembly according to claim 1 wherein the filter leaf further comprises: a gas permeable portion of hydrophobic material located on an upstream portion of the filter leaf. 6. A cross flow fluid filter assembly comprising: a) a header box for receiving a fluid to be filtered under pressure, the header box having a pierced wall with apertures formed therethrough for providing fluid communication with a filter tank for delivering pressurized fluids thereto; b) a filter tank in fluid communication with the header box; c) at least one filter leaf disposed within the tank and comprising: 1) a fluid tight frame; 2) a filter core having at least two abutting offset grids contained within the frame; 3) a drain tube within said grids, the tube having at least one aperture formed therethrough; 4) at least one filtering media sealingly covering the core; d) means for sealingly attaching the filter leaf to a filtrate manifold such that the filter leaf drain tube and filtrate manifold are in fluid communication; e) a filtrate manifold, the manifold being affixed within the filter tank, the manifold being in fluid communication with the exterior of the filter tank; f) a filtrate pump operatively attached to the filtrate manifold; g) means for draining the filter tank; h) a backwash tank for filtrate storage; i) means for delivering filtrate to the backwash tank; j) means for applying filtrate from the backwash tank to backwash the filter leaf; and k) a backwash stop-grid placed adjacent each filtering media so as to oppose any bulging of the filtering media away from its associated filter leaf, the backwash stop-grid constructed so as to have a fluid path therethrough. 7. The fluid filter assembly of claim 6 further comprising: a) at least one spacer fixedly attached to the pierced wall of the header box and extending into the filter tank, for maintaining the filter leaf position within the filter tank; and wherein the backwash stop-grid is affixed to the header box pierced wall and is integral with the spacer. 8. A cross flow fluid filter assembly comprising: a) a filter tank having means for receiving a fluid to be filtered under pressure; b) a filtrate outlet line; c) one or more filter leafs: 1) the filter leafs having filter media surfaces, 2) the filter leafs contained within the filter tank, and 3) each filter leaf in fluid communication with the filtrate outlet line; d) means for turbulently distributing input fluid to the filter media surfaces of the filter leafs; e) backwash stop-grids fixedly placed in opposition to all filter media surfaces; f) means for draining the filter tank; g) a backwash tank for filtrate storage; h) means for delivering filtrate to the backwash tank; and, i) means for applying filtrate from the backwash tank to backwash the filter leaf. 9. The fluid filter assembly according to claim 8 wherein the turbulent distribution means further comprises: a header box overlying the filter leafs having; a) means for receiving a pressurized fluid, b) means for maintaining the spatial relationship among the filter leafs and the filter tank, and c) apertures in fluid communication with the filter tank. 10. The fluid filter assembly according to claim 9 wherein the filter tank further comprises: a) a first upstream section for receiving the header box; b) a second midstream section for holding the filter leafs; c) a third downstream section of substantially conical shape in fluid communication with the drain means. 11. The fluid filter assembly according to claim 10 wherein: a vacuum source is attached to the filtrate outlet line. 12. The fluid filter assembly of claim 11 wherein: the filter leaf further comprises: a) opposing offset grids contained within a fluid tight frame; b) a fluid tight frame; c) a medial drain conduit having a portion internal to said frame and a portion external to said frame; 1) the internal portion of the conduit having an aperture therethrough, 2) the external portion of the conduit being fluid-tight with said frame and being further sealingly attachable to the filtrate outlet line, 3) the frame having a porous filter media covering the periphery of said frame; d) a porous filter media for forming a barrier to the interior of said filter leaf. e) means for expulsion of trapped air from the interior of the filter leaf. 13. The fluid filter assembly according to claim 12 wherein the means for expulsion of trapped air includes a hydrophobic strip of gas permeable material capable of releasing trapped air throughout filter operations. 14. The fluid filter assembly according to claim 13 wherein: the backwash stop-grids further comprise means for permitting substantially unimpeded fluid flow therethrough. 15. The fluid filter assembly according to claim 14 wherein: the plurality of filter leafs are arranged in parallel within the tank. 16. The fluid filter assembly according to claim 9 wherein: the backwash stop-grid is affixed to the header box. 17. The fluid filter assembly according to claim 8 wherein said backwash stop-grids comprise netting operably attached to the filter leaf and overlying the filter media. 18. The fluid filter assembly according to claim 8 wherein the drain means further comprises: (a) a drain line, (b) a discharge line for containment of concentrated particulates, the discharge line having a separate downstream terminus from the drain line. 19. The fluid filter assembly according to claim 8 wherein the drain means futher comprises: a drain line having a modulating drain valve for the variable control of fluid flow therethrough. 20. The fluid filter apparatus of claim 8, wherein the filtrate outlet line further comprises: a manifold for receiving the filtrate of the filter leafs, the manifold being releasably mounted within the filter tank by a quick-release mechanism.