Patent US4795557A successfully refreshed from Google Patents.
US4795557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for gas transfer and flotation for treating water to be purified
Assignee: OTV Omnium de Traitements et de Valorisation SA
•
Filing: 1987-06-10
•
Granted: 1989-01-03
•
Expires: 2007-06-10
Abstract
Abstract Apparatus for treating water by gaseous diffusion and flotation comprising a single reactor which is separated into at least two compartments. One compartment is used for gas transfer with a pressurized gas diffuser flushed by a liquid current wherein water to be treated is introduced downwardly. The other compartment is in communication with the first compartment by means of an orifice whose opening diameter and orientation are controlled.
Inventors
- 👤 Marie-Marguerite Bourbigot
- 👤 Michel Faivre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:48
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/08; B03D1/082; B03D1/14; B03D1/1412; B03D1/24; B03D1/245; C; C02; C02F; C02F1/00; C02F1/24; C02F3/00; C02F3/02; C02F3/12; C02F3/20; C02F3/22; C02F3/226; B03D1/1443; B03D1/1475; C02F1/001; C02F1/72; C02F1/78; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
209 words
Apparatus for combining the processes of gas transfer and flotation in one unit for pretreatment of water to be purified, said apparatus employing the diffusion of gas through a porous material and segregation of gas bubbles by entraining speed of the water to be purified, said apparatus comprising: a reactor which is separated by at least one partition into at least two adjacent communicating compartments, said at least two compartments comprising at least one gas transfer compartment and at least one flotation compartment; said gas transfer compartment provided with at least one pressurized gas diffuser generating bubbles with a diameter less than 2 mm, flushing means for flushing the surface of said gas diffuser by a liquid current in a liquid/gas flow ratio greater than 0.5 and an inlet in said gas transfer compartment, above said flushing means, for introducing water to be treated downwardly into said gas transfer compartment; at least one orifice located in said at least one partition between said compartments, the sections and opening orientation of said orifice being such that the speed Vs of the passage of a current of water between said gas transfer and said flotation compartments is greater than the rising speed Va of the gas bubbles in said transfer compartment.
Claim 2
Dependent Claim
209 words
Apparatus for combining the processes of gas transfer and flotation in one unit for pretreatment of water to be purified, said apparatus employing the diffusion of gas through a porous material and segregation of gas bubbles by entraining speed of the water to be purified, said apparatus comprising: a reactor which is separated by at least one partition into at least two adjacent communicating compartments, said at least two compartments comprising at least one gas transfer compartment and at least one flotation compartment; said gas transfer compartment provided with at least one pressurized gas diffuser generating bubbles with a diameter less than 2 mm, flushing means for flushing the surface of said gas diffuser by a liquid current in a liquid/gas flow ratio greater than 0.5 and an inlet in said gas transfer compartment, above said flushing means, for introducing water to be treated downwardly into said gas transfer compartment; at least one orifice located in said at least one partition between said compartments, the sections and opening orientation of said orifice being such that the speed Vs of the passage of a current of water between said gas transfer and said flotation compartments is greater than the rising speed Va of the gas bubbles in said transfer compartment.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 wherein each partition comprises two vertical walls in alignment whereby said orifice is located between said vertical walls.
Claim 4
Dependent Claim
24 words
The apparatus of claim 1 wherein each partition comprises vertical walls offset in relation to one another sufficient to leave space for said orifice.
Claim 5
Dependent Claim
33 words
The apparatus of claim 1 wherein each partition comprises two walls, at least one of which is in an inclined position relative to the other, the clearance between said walls forming said orifice.
Claim 6
Dependent Claim
10 words
The apparatus of claim 2 wherein said walls are stationary.
Claim 7
Dependent Claim
10 words
The apparatus of claim 2 wherein said walls are mobile.
Claim 8
Dependent Claim
10 words
The apparatus of claim 3 wherein said walls are stationary.
Claim 9
Dependent Claim
10 words
The apparatus of claim 3 wherein said walls are mobile.
Claim 10
Dependent Claim
10 words
The apparatus of claim 4 wherein said walls are stationary.
Claim 11
Dependent Claim
10 words
The apparatus of claim 4 wherein said walls are mobile.
Claim 12
Dependent Claim
15 words
The apparatus of claim 2 wherein at least two orifices are provided between the walls.
Claim 13
Dependent Claim
15 words
The apparatus of claim 3 wherein at least two orifices are provided between the walls.
Claim 14
Dependent Claim
15 words
The apparatus of claim 4 wherein at least two orifices are provided between the walls.
Claim 15
Dependent Claim
15 words
The apparatus of claim 5 wherein at least two orifices are provided between the walls.
Claim 16
Dependent Claim
15 words
The apparatus of claim 6 wherein at least two orifices are provided between the walls.
Claim 17
Dependent Claim
20 words
The apparatus of claim 1 wherein the gas diffuser is located above the level of the orifice between said compartments.
Claim 18
Dependent Claim
20 words
The apparatus of claim 1 wherein the gas diffuser is located below the level of the orifice beween said compartments.
Claim 19
Dependent Claim
53 words
The apparatus of claim 1 wherein the speed Vs is maintained at more than 100 m/hr and the speed Vs of the gas bubbles in the flotation compartment is greater than the speed V of the treated water at the outlet of the reactor, the speed V being from 10 to 30 m/hr.
Claim 20
Dependent Claim
32 words
The apparatus of claim 1 wherein the gas is selected from the group consisting of air and ozonized oxygen containing from 40 to 100 grams of ozone per cubic meter of oxygen.
Claim 21
Dependent Claim
32 words
The apparatus of claim 1 wherein the water used for flushing the surface of the gas diffuser is selected from the group consisting of bicarbonated water and water saturated with carbon dioxide.
Claim 22
Dependent Claim
20 words
The apparatus of claim 1 wherein a bed of filtering material is installed in the lower part of the reactor.
Claim 23
Dependent Claim
25 words
The apparatus of claim 1, wherein an outlet for purified water is provided in said flotation compartment at a level below that of said orifice.
Claim 24
Dependent Claim
26 words
The apparatus of claim 21, wherein an outlet for purified water is provided in said flotation compartment in a space beneath said bed of filtering material.
References Cited (Backward Citations)
US3386228A
Cited
US4237004A
Cited
US4338192A
Cited
US4376701A
Cited
US4507253A
Cited
US4534774A
Cited
US4652370A
Cited
US4659345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |