Liquid purification or separation – With means to add treating material
Patent
1996-09-17
1998-01-06
Reifsnyder, David A.
Liquid purification or separation
With means to add treating material
2105121, 2105123, 2102212, 3661651, 3661612, 3661653, B01D 2126
Patent
active
057050600
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a vessel for mixing or separating flowing media. The invention is particularly intended for application in water purification plants.
It is known to cleanse drinking water of hydrogen sulphide, iron compounds and manganese compounds for instance, by adding oxygen to the water prior to delivering the water to the customer or consumer. A device for mixing air with a volume of flowing water with the aid of an ejector is known to the art, for instance from SE-B-464 712. The known device is placed in a hydrophore, and it is necessary for the device outlet to discharge into the air-filled part of the hydrophore. This condition naturally limits the area of use of the known device.
An object of the present invention is to provide a vessel for mixing flowing media or for separating or extracting heavy constituents from flowing media which will allow large variations in the pressure conditions that prevail at its outlet and which will enable the volume of flowing media delivered to the vessel to be accurately controlled.
This object is achieved in accordance with the invention by means of a vessel for mixing flowing media or extracting heavy constituents from flowing media which is characterized by the presence of means for generating a natural vortex in the media flowing in the vessel, and is further characterized in that the cross-section of the vessel has at least one abrupt increase in size within the region of the generated natural vortex. This construction results in strong disturbance of the natural vortex at the location of the increase in cross-section, resulting in a region of strong turbulent flow. This region constitutes a particularly effective mixing zone, which also has a relatively limited extension in the axial direction of the arrangement. The natural vortex occurs immediately downstream of the mixing zone and any particles or the like present in the flowing media will be collected in the centre of the vortex and can be separated therefrom with the aid of a central outlet which communicates with the vortex centre.
According to one preferred embodiment, the vessel is rotationally symmetrical in shape and has a first end at which media is delivered and a second end from which media is discharged, and the natural vortex generating means has the form of a delivery conduit for at least one flowing medium which connects tangentially to the rotationally symmetrical vessel at its inlet end.
In the case of one advantageous variant of a vessel with which water to be oxygenated is delivered to the inlet end of the vessel, there is provided a tube through which an oxygen-containing gas, such as air, oxygen gas or ozone is introduced and which extends centrally and axially through the end wall of the vessel at the vessel inlet end and opens out in the vessel at a point upstream of the location of the abruptly increased cross-sectional area. The gas delivery tube may advantageously have a flared discharge part or mouth.
The invention will now be described with reference to the accompanying drawings, in which
FIG. 1 is a schematic partially cut-away side view of a first embodiment of an inventive vessel;
FIG. 2 is a sectional view taken on the line II--II in FIG. 1;
FIG. 3 is a side view of a second embodiment of an inventive vessel;
FIG. 4 is a side view of a third embodiment of an inventive vessel;
FIG. 5 is a side view of a fourth embodiment of an inventive vessel; and
FIGS. 6 and 7 are respectively side views of a fifth and a sixth embodiment of an inventive vessel.
The vessel 1 illustrated in FIGS. 1 and 2 includes a tube 2 which has an upper tubular part 3, a lower tubular part 4, whose diameter is larger than the part 3, and a transition part 5 which connects the upper and the lower tube parts together. Connected to the upper end of the upper tube part 3 is a cylindrical inlet chamber 6 into which a tangentially directed inlet conduit 7 opens out. The vessel also includes a centrally positioned second tube 8 which has a smaller diameter than the tube part 3 and which extend
REFERENCES:
patent: 4087862 (1978-05-01), Tsien
patent: 4292259 (1981-09-01), Roth et al.
patent: 4389312 (1983-06-01), Beard
patent: 5470465 (1995-11-01), Moorehead et al.
Gavle Galvan Tryckkarl AB
Reifsnyder David A.
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