Liquid purification or separation – Processes – Separating
Patent
1994-01-17
1996-03-26
Dawson, Robert A.
Liquid purification or separation
Processes
Separating
2105123, 209715, 209722, 209723, 209725, 494 55, B01D 2120
Patent
active
055018033
DESCRIPTION:
BRIEF SUMMARY
The subject invention concerns separation from a base liquid, of particles and other substances contained therein, having a density deviating from that of the base liquid.
The main purpose of the invention is to make it possible to separate, by simple means, such particles from the base liquid possible in an efficient manner.
Some examples of devices designed to perform the method in accordance with the invention will be described in the following with reference to the accompanying drawings, wherein:
FIG. 1 is a schematic vertical cross-sectional view through a device primarily intended to separate light pollutants from a base liquid;
FIG. 2 is a corresponding vertical cross-sectional view through a further developement of the device in accordance with FIG. 1;
FIG. 3 is a view from above of a portion of a detail component incorporated in the device shown in FIG. 2;
FIG. 4 is a vertical cross-sectional view corresponding to FIG. 2 of a portion of a detail incorporated in said device;
FIG. 5 is a partial sectional view corresponding to FIG. 4 and showing the corresponding detail component in accordance with an alternative embodiment in position of rest;
FIG. 6 is a partial sectional view corresponding to FIG. 5 of the same detail component in operative position, and
FIG. 7 is a schematic cross-sectional view corresponding to FIG. 1 through a device for separation of particles which are both lighter and heavier than the associated base liquid.
The device illustrated in FIG. 1 consists of a housing generally designated by 1 and comprising a ceiling 2, a floor 3 and an external lateral wall 4. At the floor of the housing, a rotatable disc 6 is mounted on a shaft 5 and supports at its periphery a cylindrical wall 7 which is arranged to take part in the rotational movement of the disc 6 as the shaft 5 is rotated. Centrally located in the ceiling 2 is formed a first collection pocket 8 and likewise in a central location the floor 3 is formed with a second collection pocket 9. An second outlet channel 10 debouches in the collection pocket 8 and an third outlet channel 11 debouches in the collection pocket 9. The external wall 4 preferably is cylindrical, having a curvature such that is extends along the cylindrical wall 7. An inlet channel 13 debouches into the upper part of a separation space 12 formed in the interior of the housing 1, through which inlet channel 13 is supplied the liquid to be cleaned, and into the lower part thereof debouches an first outlet channel 14 through which cleaned liquid is removed. Preferably the gap between the inlet channel 13 and the upper edge of the wall 7 is bridged by a covering flange 15 which may extend along the entire periphery of the wall 7 and the housing 1, respectively. Above the outlet channel an annular sealing member 16 may be provided on the wall 7 or on the disc 6 so as to take part in their rotational movement, the outer sealing edge then being close to the inner face of the wall 4 in the case the latter is cylindrical. When the wall 4 has a different configuration the annular sealing member 16 may instead be attached to said outer wall and project towards the rotating wall 7. The ceiling 2 and the disc 6 are designed to ensure that the body of liquid positioned intermediate these two components is rotationally symmetrical about the shaft 5 and the shaft prolongates through the housing. By this should be understood that the vertical distance between the facing surfaces of said components is essentially constant during the-entire rotational movement.
When a base liquid containing light pollutant particles etcetera is supplied continuously through the inlet channel 13 so as to fill the interior of the housing 1 entirely and the disc 6 is set in rotational movement, the main portion of the body of liquid present in the separation space, with the exception of thin boundary layers adjacent the walls, will be given a speed of rotation corresponding to about half the speed of rotation of the disc 6. The rotational movement is indicated by rotational signs 17, respectivel
REFERENCES:
patent: 1048846 (1912-12-01), Mattern
patent: 3764007 (1973-10-01), Schmid et al.
patent: 5229014 (1993-07-01), Collins
Dawson Robert A.
Gosta Wahlin Havsteknik AB
Reifsnyder David A.
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