# US 5,348,648 A · Flotation device for the treatment of water polluted by hydrocarbons

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- Number: US 5,348,648 A
- Document ID: US5348648A
- Status: Granted
- Kind: A
- Application number: 07/956,734
- Filed: 1992-10-02
- Granted: 1994-09-20
- Earliest claimed: 1991-10-03
- Assignees: Ceca S.A.
- Inventors: Adnan Hamdan
- Web page: https://patentgrep.com/patent/US5348648A

## CPC

- B03D 1/16: with impellers; Subaeration machines {(mixing gases or vapours with liquids B01F23/20)}
- B01D 1/20: Sprayers (in general B05B)
- B01D 17/0205: {by gas bubbles or moving solids}
- B01D 17/0208: {by sedimentation}
- B01D 17/0214: {with removal of one of the phases}
- B01D 17/0217: {by centrifugal force}
- B03D 1/1462: {Discharge mechanisms for the froth}
- B03D 1/1493: {with means for establishing a specified flow pattern}
- B03D 1/1412: {with baffles, e.g. at the wall for redirecting settling solids}
- C02F 1/24: by flotation (C02F1/465 takes precedence)
- C02F 2101/32: Hydrocarbons, e.g. oil
- B03D: FLOTATION; DIFFERENTIAL SEDIMENTATION (sedimentation in general B01D21/00; in combination with other separation of solids B03B; sink-float separation B03B5/28; detergents, soaps C11D)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

A flotation device for the separation of nonmiscible liquids, particularly the separation of water and hydrocarbon pollutants, comprising a cylindrical tank divided by partitions into a feed flow rate homogenization compartment, at least one flotation cell equipped with a cyclone-turbine and a skimming chamber with self-stabilizing chute, and a tranquilization compartment, characterized in that said cyclone-turbine is equipped with a throttling disk and vortex stabilization baffles, and that the skimming chute is equipped with lateral floats and counterweights.

## Claims

### Claim 1

A flotation device for the separation of oils, creams, or froths floating on the surface of aqueous liquids, comprising a cylindrical tank divided by partitions into a feed-flow rate homogenization compartment, at least one flotation cell equipped with (a) a cyclone-turbine comprising a rotor with mobile blades housed in a stator cage and a stack positioned above the cyclone-turbine and (b) a skimming chamber with a self-stabilizing chute, and a tranquilization compartment, said cyclone-turbine having a throttling disk positioned between said stator cage and said stack and vortex stabilization baffles attached to the inside wall of said stack, said skimming chute being displaced vertically with respect to the surface of the aqueous liquid in said at least one flotation cell, and said skimming chute being self-stabilizing and comprising an exterior skirt having attached thereto two counterweights, two lateral floats, and two vertical floats which act to maintain said skimming chute at the surface of the aqueous liquids.

### Claim 2 (depends on 1)

The flotation device of claim 1 also including a connecting pot attached to said flotation device at said tranquilization compartment to assure a seal between a capacity under gas cover and the exterior, said pot comprising a cylindrical body inside of which extends vertically an outlet pipe, having an adjustable sill displaced vertically in relation to the interior upper end.