Filtration equipement for liquids

Abstract: A partition (1) which has a float (12) on its upper edge divides the inside of the container into two compartments A and B, it being fitted on its perimeter which is in contact with the walls and bottom of the container by a U frame (4) provided with three flexible bands (2, 3 and 24). In compartment B anchored on the support (7) there are the filters (8) together with the supports (9). A pump (5) transfers liquid from the bottom of B to the bottom of A, channeling it between the flexible bands (2 and 3) and below the partition (1) in uniform and calibrated manner over its entire length, at the same time as it passes from A to B above the float (12), which also meters and calibrates the liquid over its entire length, generating a surface stream which discharges into the filters.

Description: The present invention relates to a FILTRATION EQUIPMENT FOR LIQUIDS which can be applied to any type of natural or artificial container, of any shape and nature, and for different liquids. For the filtration of liquids containing different types of material suspended therein, and within the large existing variety, it is attempted, with greater or lesser efficiency, by different means to obtain a flow on the surface which is as fast as possible and which entrains the floating impurities in order to transfer them to the filtering elements through suitable conduits while at the time that the entire volume is removed. In order to achieve this efficiently, it is necessary to be able to filter large volumes of flow in proportion to the volume of the container, which, on the other hand, in order to do so at low pressure requires also a very large filtering surface occupying an amount of space which is at times difficultly available and is always very expensive. By the present equipment, developed for use in "any type" of natural or artificial container of any shape and nature and for different liquids, this flow is easily obtained, as well as the logical recirculation of the entire volume contained, it being collected on the surface and returned at the bottom in calibrated manner in both operations, without complicated installations and within the container itself, at the same time as there is obtained a filtering surface which in many cases is larger than that the surface of the container itself, which makes it possible to filter large volumes of flow at low pressure without taking up more space on the outside thereof than is necessary for a simple recirculation pump. The equipment of the invention comprises a receptacle containing the liquid to be filtered. Said receptacle comprises a partition provided therein dividing it into two compartments A and B. The upper edge of such partition is provided with a float attached thereto by means of a soft, thin, flexible strip. The receptacle is also provided with a U-shaped frame having three flexible perimetral bands the ends of which are in contact therewith to seal compartments A and B in the receptacle allowing the liquid to pass therebetween below said partition in a uniform and calibrated manner by means of a soft pad provided in the lower edge of said frame. The equipment is also provided with filtering elements fitted on a horizontal support provided near the upper part of the face B of the partition. Said support rests on a vertical side in the partition by an upwardly flexed band extending all over the contact perimeter thereof. The filtering elements are provided with a head with grooves where lips are formed sensitive to the pressure in the equipment pump in such a way that they open as pump works allowing the water flow into the filtering elements and close as it is in an idle condition. The lips acting as a valve may have a substantially trapezoidal, oval or star shape or another suitable configuration. Fig. 1 shows an operating diagram; Figs. 2, 3, 4 and 5 show an example of the arrangement of the equipment and a few possible variants; Fig. 6 shows the characteristics of the float; Figs. 7 and 8 are a perspective view of the assembly. The non-limitative embodiment proposed which is illustrated in the accompanying drawings consists of a flat partition (1) which, when introduced into the inside of the receptacle containing the liquid to be filtered, in vertical position from the bottom to the surface, extending parallel to one or more side thereof (Figs. 3, 4 and 5), resting on them by supports (9) perpendicular to the two facing surfaces, the free end of which is covered by a soft cap (14), in order to support the horizontal component of the differential pressure, divides its interior into two compartments A and B, its ends (17) coming against the sides of the container which are perpendicular to it. A U-shaped frame (4) abutting against the face B of the partition (1) extending parallel to its three edges (17) which are in contact with the container, which rests on the walls and the bottom of the container, resting on a soft cushion (18) interposed between the two, has, on its surface facing the partition (1), the outer perimeter (19) extending in contact with the latter, a blade (3) bending obliquely to its perpendicular, which, resting against the walls and the bottom of the receptacle, seal the two compartments A and B from each other, utilizing the differential pressure exerted on it by the difference in levels created between the two during operation. At its lower edge (20) in contact with the bottom and superimposed on the first band, it has a second band (3) and in the space between the two there are conduits (22) which communicate with the compartment A, with the return channeling of the fluid which, in its turn, passes to the pump (5) which is located on the outside. On the inner perimetral face (23) of the frame (4) there is a third band (24) which flexes obliquely to its perpendicular which rests on the face B of the partition (1) sealing the two from each other if the said differential pressure acts on it. A support (7) from which there are suspended the filtering elements (8) best suited for the liquid to be filtered (bags of textile fabric, cartridges, conglomerates of fibers, calibrated disks, supports for diatomaceous earth, or any other known filtering element), placed in horizontal position, near the upper part of the partition (1) on its face B, perpendicular to it, between the latter and the side of the container which is parallel to it, resting on it by a band which is flexed upward placed over the entire perimeter of contact between the two, sealing this joint. On the upper edge of the partition (1), attached to it by a thin flexible band (11), there is a float (12) of equal length and uniform density, protruding above the level of the liquid. The assembly is completed by a recirculation pump (5) located on the outside of the container, the end of the intake pipe (6) of which is located near the bottom of the compartment B and its return (13) connected to the outlets (22). OPERATION In state of rest, the levels in the two compartments are equalized through the return conduit (13) - pump (5') - intake (6), and the float (12) separates them when projecting upward. When the pump (5) is connected, it draws in the liquid from the bottom of the compartment B, and passes it through the filters (8) below the level in B forcing the float (12) to descend below the level in A and allowing the volume of liquid necessary in order to feed the pump (5) to pass above it, at the same time as it returns to A through the conduit (13) via the outlets (22), forcing the second flexible band (3) to lift only the amount necessary in order to permit the liquid to pass over its entire length uniformly and in calibrated manner below the partition (1), thereby creating a uniform drive force over the entire bottom of the container, which creates the inertia necessary to remove the volume of liquid from bottom to top while on the surface it slips toward the compartment B, sweeping it uniformly due to the metering effect of the float (12) which, being attached to its support by a flexible band (11), can oscillate freely (Fig. 6) in order to adapt itself to the level and therefore calibrate the size of the sheet of liquid which passes over it over its entire length. As can be clearly seen, the embodiment described makes it possible to create the necessary flow on the surface in an efficient and simple manner, to filter high volumes of flow at low pressure due to the large filtering surface which it is possible to obtain by adding, if necessary, filtering elements until filling the entire perimeter of the container and also, due to the nature and low cost of these elements, it is possible to obtain different bits "micrajes" for each type of liquid and discard them after each use or, if desired, wash them for reuse. With respect to the amount of the investment, since large outside pipelines or other annexes to the container itself are not necessary', it is very economical. Having sufficiently described the nature of the invention as well as a manner of reducing it to practice, it should be pointed out that the arrangements described above are subject to modifications in detail, provided that they do not alter its fundamental principle, which is summarized and concretely set forth in the following claims.

Claims: A filtration equipment for liquids comprising a receptacle for the liquid to be filtered, a partition (1) inside said receptacle dividing it into two compartments A and B, filtering elements being arranged in compartment B, an U-shaped frame (4) with three flexible perimetral bands in contact with the container and abutting against the partition (1), so that the two compartments A and B are sealed from each other, the upper edge of the partition being provided with a float (12) attached thereto by means of a soft, thin flexible strip (11), a flexible band (3) being provided at the bottom of the partition, wherein in operation liquid passes in a uniform and calibrated manner from compartment A over the bent flexible strip (11) in compartment B through the filtering elements and then below the partition (11) through the lifted flexible band (3) into the compartment A. A filtration equipment for liquids as claimed in claim 1, characterized in that it comprises filtering elements (8) fitted on a horizontal support (7) provided near the upper part of the face B of the partition, said support resting on a vertical side in the partition by an upwardly flexed band extending all over the contact perimeter thereof. A filtration equipment for liquids as claimed in claim 1, characterized in that the filtering elements are provided with a head with grooves where lips are formed sensitive to the pressure caused by a pump circulating the liquid. A filtration equipment for liquids as claimed in claim 3, characterized in that said lips have a substantially trapezoidal shape. A filtration equipment for liquids as claimed in claim 3, characterized in that said lips have a substantially oval shape. A filtration equipment for liquids as claimed in claim 3, characterized in that said lips have a substantially star shape.

Inventors: HERNANDEZ MAYOR DOMINGO, HERNANDEZ PEREZ JUAN, HERNANDEZ MAYOR, DOMINGO, HERNANDEZ PEREZ, JUAN
Applicants: HERNANDEZ MAYOR DOMINGO, HERNANDEZ MAYOR, DOMINGO
Application year: 1996
Main classification: B01D29
IPC codes: B01D35