Liquid purification or separation – Processes – Separating
Patent
1998-05-04
2000-11-21
Popovics, Robert J.
Liquid purification or separation
Processes
Separating
210802, 2102212, 210521, 210540, 210320, B01D 2102, B01D 3700
Patent
active
061498270
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a device for separating particles from a particle--containing liquid. The invention moreover relates to a method of cleaning a device for separating particles from a particle containing liquid, wherein these particles settle on separating elements in the device.
2. The Prior Art
In e.g. biological waste waxer purification plants, separation of the cleaned water and bacterial sludge is performed in addition to the biological cleaning process. This separation usually takes place in tanks in which the sludge precipitates and the clean liquid flows away from the surface area. Such settling plants with precipitation of particles to be separated have considerable dimensions, and the construction of these involves considerable costs partly because of a great consumption of materials and partly because of a great consumption of time for the construction.
DE 31 21 117 discloses a separating device comprising separating chambers with fillers on which pollutants contained in the inflowing water may settle, following which the water flows out at the upper end of the separating chamber. Air may be admitted to clean the fillers of settled material. The released sinking material may then be removed at the lower end of the separating chamber. The separator described affords no possibility of removing light pollution components, which will flow upwards. These will be discharged together with the outflowing water.
NO 147 822 discloses a device for separating suspended particles from water. The arrangement of various chambers of varying flow area provides coalescence of the particles. It is not explained how the removal of the particles from the device takes place.
Further, NO 133 691 discloses a device for separating components of different specific weight from a liquid. The removal of separated components from the device is not explained in this document.
Accordingly, the object of the present invention is to a provide a device for separating particles from a particle-containing liquid, which requires considerably less space, and which involves a saving in materials because of a reduced consumption of materials and may moreover be constructed more quickly, while being considerably easier to clean of separated particles.
SUMMARY OF THE INVENTION
The object of the invention is achieved by a device for separating particles from a particle containing liquid and including a separating chamber having a bottom 6 and side walls 2, 4, 5, 7, an inlet 10 for liquid with particles, an outlet 18 for the liquid essentially freed of particles, an outlet 11 for the discharge of particles, wherein at least one separating element 15, on which particles in the liquid may settle, is arranged between the inlet 10 and outlet 18 for liquid, the liquid flowing essentially in a vertical direction between inlet and outlet, wherein means 13 are arranged in the separating chamber 8 below the separating elements 15 to supply a gas under pressure, wherein the liquid outlet 18 communicates with an additional chamber 9 likewise includes a bottom 6 and side walls 2, 3, 4, 7, and wherein one side wall is formed with a liquid outlet 12 whose upper edge is present below the level of the lower edge of the particle outlet 11.
When the device is constructed in this manner, the structure obtained is compact and has a relatively large area on which settling of particles may take place. The structure thus requires less space than previously known structures and moreover involves a saving in materials, which in turn reduces the transport costs to the site of erection and reduces the work in connection with the erection of the structure.
With a view to cleaning the separating elements, the device of the invention is provided with means for the supply of a gas under pressure, preferably compressed air, said means being arranged so that the gas is supplied below the separating elements. The means are preferably constructed to extend horizontally below the separating elements.
Hereby, th
REFERENCES:
patent: 2782929 (1957-02-01), Colket
patent: 3925208 (1975-12-01), Yost
patent: 4806237 (1989-02-01), Ewald, Jr.
patent: 4925552 (1990-05-01), Bateson et al.
patent: 5240597 (1993-08-01), Veda
patent: 5340469 (1994-08-01), Montgomery
PCT International publication No. WO 96/29134.
Popovics Robert J.
Unicon Beton Holding A/S
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