摘要:
A dual bag filter is provided where a replaceable filter element resides in and is sealed to a filter housing. The filter element has a mounting ring, an inner bag, and an outer bag. The inner bag is sized such that it has more surface area than the outer bag and is constrained by the outer bag. The inner bag is formed from a filter medium of different densities such that when the inner bag is crumpled, fluid flow is not restricted.
摘要:
Fluid treatment assemblies and elements may include a plurality of axially extending pleats and may be used to treat fluids, including gases, liquids, or mixtures of gases, and/or solids, in a crossflow mode of operation. For example, some fluid treatment assemblies and elements may be used to remove one or more substances from the fluid and may then function as separators, including filters and concentrators. Other fluid treatment assemblies and elements may be used to transfer substances between two fluid streams and may then function as mass transfer devices.
摘要:
A filter device (10), particularly for use with an agricultural sprayer, comprising a) a casing (15) having a cylindrical wall (14) defining a longitudinal axis (C) of said filter device (10) and having a first end (15'), a second end (15") opposite said first end (15'), a liquid inlet (20) formed near said first end (15') in said cylindrical wall (14), a first liquid outlet (30) formed near said second end (15") in said cylindrical wall (14) and a second liquid outlet (40) arranged at said second end (15"), b) a filter element (90) disposed within said casing (15) for filtering a part of said liquid, c) a tubular insert member (80) extending within said filter element (90) along said longitudinal axis (C), said filter device (10) being adapted to set up a helical flow of said liquid along with and around said longitudinal axis (C) between said tubular insert member (80) and said casing (15), said filter element (90) having a filtering medium (F) defining a generally cylindrical wall of said filter element (90), said filter element (90) having a first end (92) and a second end (94) and being open at said first end (92) to allow entry at said first end (92) of said liquid into the interior of said filter element (90), said second outlet (40) communicating with the interior of said filter element (90) for allowing discharge of an unfiltered part of said liquid. The filter element (90) has at least one projection (98) extending inwardly in relation to the contour of said cylindrical wall defined by said filtering medium (F), and the at least one projection (98) having a face (99) extending in the general direction between said first end (92) and said second end (94) of said filter element (90).
摘要:
A papermakers' screen basket for pressure screening of papermaking stock or for pressure filtering is formed with a support core formed with honeycomb like cells that extend radially in the direction of flow through the screen basket, and a thin covering having screening openings therethrough is supported on the inlet surface of the honeycomb cell core. The core is formed by rolling a flat section of core into the shape of a cylinder and welding the abutting ends to form a complete cylinder and then attaching a perforated or a mesh sheet-like metal covering against the core inlet surface, in which the thin sheet metal covering defines small openings, such as slots or apertures, leading into the honeycomb core, and is welded in place.
摘要:
PCT No. PCT/NL96/00231 Sec. 371 Date Mar. 10, 1998 Sec. 102(e) Date Mar. 10, 1998 PCT Filed Jun. 10, 1996 PCT Pub. No. WO96/41670 PCT Pub. Date Dec. 27, 1996A method for filtering out of a liquid at least one solid substance includes supplying the liquid containing the substance via axial supply to a filter; filtering the liquid wherein the substance remains in the filter as residue; draining away the liquid; compressing a predetermined amount of residue to the shape of a solid bar under the pressure of the liquid during filtering; opening closeable discharge axially opposite the supply end during filtering; and removing the bar out of the filter under the pressure exerted by the liquid on the bar.
摘要:
An electrically conducting filter medium (20) is cleaned in situ by applying, at intervals, a brief voltage pulse between the medium (20) and a counter electrode (18) so the process liquid undergoes electrolysis. The cleaning process is significantly improved by occasionally applying a voltage of reverse polarity. For example a 5 second cleaning pulse making the filter medium (20) cathodic might be applied every quarter of an hour, and a reverse polarity pulse of similar duration applied every two hours. This process can significantly increase permeation rates.
摘要:
The self-cleaning filter particularly for high-viscosity pasty fluids has a fixed body (2) having a substantially cylindrical elongated chamber (5) in which a filtration drum (9) is supported and defines a central region (10), at one end of which there is an inlet (14) for the fluid to be filtered, and an outer annular region (11), at the other end of which there is a duct (20) for the removal of the filtered fluid; a shaft (23) is axially supported and rotationally actuated in the chamber (5) and has a helical crest (25) the profile whereof is suitable for grazing the inner surface of the drum (9) to remove therefrom the impurities which are present and is suitable for pushing the fluid toward an impurity discharge duct (21) arranged at the other end of the chamber (5), the constant cleaning of the drum (9) being suitable for keeping constant the pressure drop on the filter.
摘要:
The self-cleaning filter particularly for high-viscosity pasty fluids has a fixed body (2) having a substantially cylindrical elongated chamber (5) in which a filtration drum (9) is supported and defines a central region (10), at one end of which there is an inlet (14) for the fluid to be filtered, and an outer annular region (11), at the other end of which there is a duct (20) for the removal of the filtered fluid; a shaft (23) is axially supported and rotationally actuated in the chamber (5) and has a helical crest (25) the profile whereof is suitable for grazing the inner surface of the drum (9) to remove therefrom the impurities which are present and is suitable for pushing the fluid toward an impurity discharge duct (21) arranged at the other end of the chamber (5), the constant cleaning of the drum (9) being suitable for keeping constant the pressure drop on the filter.
摘要:
Die Erfindung betrifft einen Spaltrohrfilter mit einem hohlzylindrischen Filterelement aus gebogenen Drähten, die auf senkrechten Haltestützen befestigt sind und die zwischen sich waagerechte Spalten bilden, durch die zu filternde Flüssigkeit tritt, wobei die Zylinderinnenwand des Filterelementes die dem Flüssigkeitsstrom zugekehrte Filteroberfläche bildet, die Flüssigkeit vom Innern des Filterelementes nach außen strömt und die dem Flüssigkeitsstrom zugekehrte Filteroberfläche von einer Abstreifvorrichtung überfahrbar ist, wobei an der Zylinderinnenwand 2a eine koaxiale Wendel 5 aus Bürsten anliegt, die sich relativ gegenüber dem Filterelement 2 in einer solchen Richtung dreht, daß die auf und vor der Filteroberfläche 2a befindlichen Sink- und Schwebestoffe nach unten befördert werden.
摘要:
Die Erfindung betrifft einen Spaltrohrfilter mit einem hohlzylindrischen Filterelement aus gebogenen Drähten, die auf senkrechten Haltestützen befestigt sind und die zwischen sich waagerechte Spalten bilden, durch die zu filternde Flüssigkeit tritt, wobei die Zylinderinnenwand des Filterelementes die dem Flüssigkeitsstrom zugekehrte Filteroberfläche bildet, die Flüssigkeit vom Innern des Filterelementes nach außen strömt und die dem Flüssigkeitsstrom zugekehrte Filteroberfläche von einer Abstreifvorrichtung überfahrbar ist, wobei an der Zylinderinnenwand 2a eine koaxiale Wendel 5 aus Bürsten anliegt, die sich relativ gegenüber dem Filterelement 2 in einer solchen Richtung dreht, daß die auf und vor der Filteroberfläche 2a befindlichen Sink- und Schwebestoffe nach unten befördert werden.