Liquid purification or separation – Structural installation – Closed circulating system
Patent
1997-03-07
1998-07-07
Lithgow, Thomas M.
Liquid purification or separation
Structural installation
Closed circulating system
2102212, 210194, 2101951, 210266, 210256, 210259, 210295, 210108, A01K 6304, C02F 124
Patent
active
057763356
DESCRIPTION:
BRIEF SUMMARY
SPECIFICATION
CROSS REFERENCE TO RELATED APPLICATIONS
This is a national phase application of PCT/DE95/01192 filed 1 Sep. 1995, and based in turn upon German application P4432042.6 filed 9 Sep. 1994 under the International Convention.
FIELD OF THE INVENTION
The invention relates to a gas-entrainment/flotation reactor, especially for the processing of liquids containing organic materials, with at least one feed tube opening into an inlet chamber to which a riser tube is connected and over which riser tube a foam tube extends, a foam-collecting device being provided at the upper end of the foam tube whose lower end opens into a lower region of a tubular casing, the upper end of which is provided with at least one liquid outlet.
BACKGROUND OF THE INVENTION
A gas-entrainment/flotation reactor of the above-described type is known from the European patent 0 274 083. For the treatment of water containing especially organic materials, the water is pumped through the feed tube into the inlet chamber and thereby supplied with air or an air-ozone mixture which is admixed in the form of the finest of bubbles with the liquid. The organic materials, for example, biomass, proteins, ammonia, among others, adhere to the bubbles and rise with them in the riser tube upwardly and enter the foam tube in which the organic-material-coated bubbles form themselves into a foam column. This foam column is pressed into a collecting device, connected at the upper end of the foam tube, by the rising gas bubbles. The bubbles which are not laden with organic material or which are charged with only small amounts of organic material flow oppositely in the foam tube in the region surrounding the riser tube downwardly to the lower end into a "suction expansion cone." There the flow slows to the extent that the gas bubbles again rise upwardly. As a result, there is found in the region between the foam tube and the riser tube an upwards and downwards movement of gas bubbles. During this upwards and downwards movement organic material still contained in the water deposits on the bubbles which collect into a foam joining the main foam column at the upper end of the riser tube. The bubble-free water, cleaned from organic substances, rises upwardly through the tubular casing and leaves the reactor through its liquid outlet.
A drawback this reactor is, of course, that a greater proportion of the solid substances found in the liquid or water, especially those with the same specific gravity as the liquid or of a greater specific gravity, cannot be removed and remain in the liquid are fed back to the system to be cleaned like, for example, an aquarium.
OBJECT OF THE INVENTION
It is thus the object of the invention to provide an apparatus with which solids can be removed from a liquid to be cleaned.
Another object is to provide an apparatus of the purposes described which is as compact as possible and is easily cleaned. Still another object is to provide an apparatus having small dimensions.
SUMMARY OF THE INVENTION
This object is attained in accordance with the invention in that the inlet chamber is composed of a cylinder-shaped lower part and a cap formed as a frustocone and set on the lower part. Into this, the feed tube opens tangentially into the lower part with the consequence that the liquid mixture flowing into the inlet chamber is set in rotation. Thus the solids with the same or a higher specific gravity than the liquid is forced outwardly against the wall while the solids with a lesser specific gravity accumulate in the central region of the rotating liquid column.
There also forms by the adhesion of floatable solids on the air or air-ozone bubble, a foam column. The angle between the cone base and the conical surface is so selected that the solids contained in the liquid and pressed toward the wall of the inlet chamber by the rotation of the liquid rises along the cone wall in the rising flow to a region that encompasses the apex of an imaginary cone at the location of the frustocone.
In this region, the solids deposit in th
REFERENCES:
patent: 3669883 (1972-06-01), Huckstedt
patent: 3772192 (1973-11-01), Huckstedt
patent: 4626345 (1986-12-01), Krofta
patent: 4834872 (1989-05-01), Overath
patent: 5064531 (1991-11-01), Wang
patent: 5078867 (1992-01-01), Danner
patent: 5192423 (1993-03-01), Duczmal
patent: 5282962 (1994-02-01), Chen
patent: 5320750 (1994-06-01), Krofta
Dubno Herbert
Forschungszentrum Julich GmbH
Kateshov Yuri
Lithgow Thomas M.
LandOfFree
Gas entrainment flotation reactor with arrangements for separati does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gas entrainment flotation reactor with arrangements for separati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas entrainment flotation reactor with arrangements for separati will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1201718