US3878096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous filtration plant
Assignee: Individual
•
Filing: 1973-06-27
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Granted: 1975-04-15
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Expires: 1993-06-27
Abstract
Abstract The present invention relates to a method and a continuous filtration apparatus, for instance, for water, which is characterised by using a porous bed of discrete material, sand, coke, breeze or other reactive agent, moving in one direction, whilst water or other liquid moves in the opposite direction. What is thereby achieved is that the dirtiest part of the filter or reactor media is in continuous contact with the dirtiest part of the liquid or gas to be filtered, and at the point of the liquid or gas emerging from the solid bed, the solid bed is at its cleanest. A small but varying proportion of the filter bed is continuously or intermittently extracted at such a rate as is necessary to remove the deposited dirt and/or to avoid the blockage of the filter by the removed impurities. Such filtering media removed is then cleaned, suitably purified and, if necessary, chemically treated, before being returned to the filter bed with the new material. The filter bed itself is automatically filled at the same rate as discharged, on the lower end, and can consist of one or various mixtures of filtering media, if necessary with chemicals, flocculents and so on added to suit the purpose of the filtration and the nature of the impurities and of the liquid from which they have to be removed. such apparatus removes the necessity of backwashing the media inside the apparatus and obviates the costly backwash cycle controls. It also can operate on much thicker liquids - up to several per cent suspended solids.
Inventors
- 👤 Francis Paul Somogyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/46; B01D24/4631; B01D24/02; B01D24/10; B01D24/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
538 words
An apparatus for the continuous filtration of a liquid, comprising, a porous bed of discrete material, a vessel which is capable of containing said porous bed of discrete material which is movable in counter-current to the liquid to be filtered, said vessel being structured such that the height of the vessel section which will contain said porous bed of discrete material to the diameter of the vessel has a ratio of not greater than 5: 1; inlet pipe means connected to the bottom of said vessel and through which the liquid to be filtered can flow into said vessel; an outlet pipe means connected to said vessel and spaced vertically from said inlet pipe means for permitting the outflow of the filtered liquid; a plurality of drainage devices positioned at spaced vertical intervals intermediate the top and bottom of said vessel and connected to said liquid outlet pipe means to allow uniform drainage of liquid from said porous bed of discrete material; each drainage device extending over substantially the whole cross sectional area which will contain said porous bed of discrete material, with the filtered liquid flowing from said vessel out of said drainage devices; each of the drainage devices comprising inverted circular channels having upper and lower openings therein, channel manifolds internal of the vessel and communicating with said circular channels through said upper openings, and a main drainage manifold external of the vessel and communicating with the channel manifolds, the lower openings in said circular channels communicating with said porous bed of discrete material and receiving the upwardly moving liquid therein and channeling said received liquid through the upper openings and into the channel manifolds for subsequent movement out of the vessel through the main drainage manifold, the inverted circular channels concentrically inscribing anD lying over the full cross-sectional area of said porous bed of discrete material thereby to remove liquid uniformly from said porous bed of discrete material in the plane in which the lower openings lie; inlet means for receiving the discrete material for said porous base of discrete material, at the top of the vessel; at least one outlet means for discharging the discrete material from said porous bed of discrete material positioned at the base of said vessel, the outlet means comprising a plate of substantially the same area as the cross-sectional area of the vessel in the plane in which the plate lies, the plate having a plurality of circular openings, a plurality of funnels connected one each to one each of the circular openings, the discrete material from said porous bed of discrete material moving through the funnels for discharge from the vessel; means for controlling within the vessel the rate at which the discrete material from said porous bed of discrete material is discharged from the vessel, said means comprising a gate at the base of each of the funnels for controlling the movement of discrete material from said porous bed of discrete material through the circular openings and the funnels connected thereto; and means for receiving the discharged discrete material from said porous bed of discrete material and at least portions of the filtered liquid for cleaning the discharged discrete material from said porous bed of discrete material.
Claim 2
Independent Claim
538 words
An apparatus for the continuous filtration of a liquid, comprising, a porous bed of discrete material, a vessel which is capable of containing said porous bed of discrete material which is movable in counter-current to the liquid to be filtered, said vessel being structured such that the height of the vessel section which will contain said porous bed of discrete material to the diameter of the vessel has a ratio of not greater than 5: 1; inlet pipe means connected to the bottom of said vessel and through which the liquid to be filtered can flow into said vessel; an outlet pipe means connected to said vessel and spaced vertically from said inlet pipe means for permitting the outflow of the filtered liquid; a plurality of drainage devices positioned at spaced vertical intervals intermediate the top and bottom of said vessel and connected to said liquid outlet pipe means to allow uniform drainage of liquid from said porous bed of discrete material; each drainage device extending over substantially the whole cross sectional area which will contain said porous bed of discrete material, with the filtered liquid flowing from said vessel out of said drainage devices; each of the drainage devices comprising inverted circular channels having upper and lower openings therein, channel manifolds internal of the vessel and communicating with said circular channels through said upper openings, and a main drainage manifold external of the vessel and communicating with the channel manifolds, the lower openings in said circular channels communicating with said porous bed of discrete material and receiving the upwardly moving liquid therein and channeling said received liquid through the upper openings and into the channel manifolds for subsequent movement out of the vessel through the main drainage manifold, the inverted circular channels concentrically inscribing anD lying over the full cross-sectional area of said porous bed of discrete material thereby to remove liquid uniformly from said porous bed of discrete material in the plane in which the lower openings lie; inlet means for receiving the discrete material for said porous base of discrete material, at the top of the vessel; at least one outlet means for discharging the discrete material from said porous bed of discrete material positioned at the base of said vessel, the outlet means comprising a plate of substantially the same area as the cross-sectional area of the vessel in the plane in which the plate lies, the plate having a plurality of circular openings, a plurality of funnels connected one each to one each of the circular openings, the discrete material from said porous bed of discrete material moving through the funnels for discharge from the vessel; means for controlling within the vessel the rate at which the discrete material from said porous bed of discrete material is discharged from the vessel, said means comprising a gate at the base of each of the funnels for controlling the movement of discrete material from said porous bed of discrete material through the circular openings and the funnels connected thereto; and means for receiving the discharged discrete material from said porous bed of discrete material and at least portions of the filtered liquid for cleaning the discharged discrete material from said porous bed of discrete material.
Claim 3
Dependent Claim
80 words
The apparatus of claim 1 wherein the funnels comprising the outlet means for discharging the discrete material from said porous bed of discrete material are comprised of saddles disposed between the openings in the plate and form funnel-like entrances to the holes, the saddles being hollow, and spray openings at the bases of the saddles through which water is directed toward the circular holes to prevent the discrete material from said porous bed of discrete material from clogging the holes.
Claim 4
Dependent Claim
21 words
An apparatus as claimed in claim 1, wherein the particle diameter of said discrete material is not greater than 5/32 inches.
Claim 5
Dependent Claim
102 words
An apparatus as claimed in claim 3 wherein said vessel is cylindrical with a funnel shape at the lower end thereof, said outlet means being attached to said funnel shape and through which the filtering media can flow, with the inlet means for said discrete material comprising a funnel which enables the discrete material to pass into said vessel, with the upper and broader end of said funnel being positioned outside said vessel and the lower and narrower end of said funnel passing into said vessel such that, the lower end of the funnel is positioned below the filtered liquid outlet means.
Claim 6
Dependent Claim
19 words
An apparatus as claimed in claim 1 and additionally means for returning the cleaned discrete material to said vessel.
Claim 7
Dependent Claim
43 words
An apparatus as claimed in claim 1 wherein said rate controlling means includes a flow sensitive device which controls the rate of supply of raw water to the lower end of the vessel to assist in the discharge of the discrete material thereform.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |