Liquid purification or separation – Filter – With movable means to compress medium
Patent
1993-09-30
1995-11-28
Dawson, Robert A.
Liquid purification or separation
Filter
With movable means to compress medium
210411, B01D 3906
Patent
active
054704707
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention is concerned with a filtering apparatus for a liquid, which is more particularly designed for clarifying drinking water, as well as for recycling household or industrial waste waters, or for other applications, such as for example in the general field of chemistry, food processing, etc.
BACKGROUND OF THE INVENTION
In numerous industrial fields, it is necessary to have at one's disposal filtering installations for liquids, in particular for water, which are both efficient and convenient to use. Preferably, such installations should include a filtering system which can readily be cleaned, for example by countercurrent rinsing, without the need to dismount the installation and if possible, automatically.
SUMMARY OF THE INVENTION
Accordingly, the objective of the present invention is to provide such installations, which include a filtering system of a type which is both new and original. The object of this invention aimed at satisfying this objective thus consists of a filtering apparatus for a liquid which comprises a filter body housing a filter module and having an inlet port for the liquid to be filtered and outlet port for the filtered liquid.
Another object of this invention is a filtering module which consists of a compact mass of substantially parallel elongate fibers oriented axially in a cylindrical casing. An inflatable band surrounds the fiber mass and is located between the fiber mass and the inner wall of the cylindrical casing.
BRIEF DESCRIPTION OF THE DRAWINGS
The appended drawing illustrates schematically and by way of example the two objects of the invention.
FIG. 1 is a basic diagram illustrating the manner in which the filtering apparatus of the invention is constructed.
FIGS. 2 and 3 are respectively a side view partly in vertical cross-section and a view from beneath partly in horizontal cross-section of an embodiment of the filtering module according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
With reference firstly to FIG. 1, the apparatus illustrated includes a filter body 1 of a cylindrical shape, the upper part of which is closed by a cover 2, and in which is housed a filtering module 3 which will be described more in detail later. This filtering module 3 occupies a central position in the internal volume defined by the filter body 1, in such a manner that two cavities, respectively the upper one 4 and the lower one 5 are formed respectively above and below said module.
The introduction of the liquid to be treated is carried out via an orifice 6 located at the lower end of the conical bottom of body 1, the tube for the introduction being provided with a valve 7 and with a flow regulator 8; the introduction orifice 6 is also intended for draining purposes and is hence connected to an evacuation tube provided with a valve 9. Two orifices are provided in the upper cavity 4, of which the first orifice 10 is used as outlet for the filtered liquid and is connected on the one hand to an outlet tube equipped with a valve 11 and on the other hand to a tube 12 for introducing the rinsing liquid via a valve 13 and a flow regulator 14, and further to a drainage tube 15 provided with a valve 16. The second orifice 17 is designed for introducing compressed air via a check valve 18 into the upper cavity 4; further, the compressed air circuit also includes a supply conduit 19 opening into the filtering module 3, of which the functioning will be described in detail later. An inlet valve 20 is further provided on this conduit 19, as well as a pressure controller 21.
The apparatus according to the invention, as illustrated schematically in FIG. 1, can further include other ancillary equipment, such as a puppet va.ve 22, a pressure controller for the rinsing liquid 23, a maximum pressure controller 24, and a downstream pressure control gauge 25.
Concerning the filtering module itself, as illustrated by way of example in FIGS. 2 and 3, it is formed by a filtering mass 26 housed inside a cylindrical casing 27 made of a synthetic materia
REFERENCES:
patent: 3180825 (1965-04-01), Couvreur et al.
patent: 4139473 (1979-02-01), Alldredge
patent: 4219420 (1980-08-01), Muller
patent: 4816147 (1989-03-01), Eyben et al.
patent: 4851136 (1989-07-01), Fanging et al.
Dawson Robert A.
Leyat Fils Marketing SA
Walker W. L.
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