CA2120436A1 - Flotation system - Google Patents
Flotation systemInfo
- Publication number
- CA2120436A1 CA2120436A1 CA 2120436 CA2120436A CA2120436A1 CA 2120436 A1 CA2120436 A1 CA 2120436A1 CA 2120436 CA2120436 CA 2120436 CA 2120436 A CA2120436 A CA 2120436A CA 2120436 A1 CA2120436 A1 CA 2120436A1
- Authority
- CA
- Canada
- Prior art keywords
- separator
- diameter
- flotation system
- outlet
- immersion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000005188 flotation Methods 0.000 title claims abstract description 20
- 238000007654 immersion Methods 0.000 claims abstract description 19
- 239000000725 suspension Substances 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000007872 degassing Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/32—Defibrating by other means of waste paper
- D21B1/325—Defibrating by other means of waste paper de-inking devices
- D21B1/327—Defibrating by other means of waste paper de-inking devices using flotation devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/1418—Flotation machines using centrifugal forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/1443—Feed or discharge mechanisms for flotation tanks
- B03D1/1456—Feed mechanisms for the slurry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/1443—Feed or discharge mechanisms for flotation tanks
- B03D1/1462—Discharge mechanisms for the froth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C3/00—Apparatus in which the axial direction of the vortex flow following a screw-thread type line remains unchanged ; Devices in which one of the two discharge ducts returns centrally through the vortex chamber, a reverse-flow vortex being prevented by bulkheads in the central discharge duct
- B04C2003/003—Shapes or dimensions of vortex chambers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Biotechnology (AREA)
- Paper (AREA)
- Fish Paste Products (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Cyclones (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A flotation system, specifically for cleaning fiber suspension in the paper industry, has an essentially rotationally symmetric separator for air bubbles with dirt particles adhering thereto, for one, and fibers for another. A specifically tangential inlet for suspensions to be cleaned, an outlet for cleaned suspension, and a central immersion pipe are provided. The inlet is arranged below and the outlet above while the separator upwardly tapers considerably, the diameter ratio (D1/D2) of the largest diameter (D1) to the smallest diameter (D2) ranging between 1.2 and 3.
A flotation system, specifically for cleaning fiber suspension in the paper industry, has an essentially rotationally symmetric separator for air bubbles with dirt particles adhering thereto, for one, and fibers for another. A specifically tangential inlet for suspensions to be cleaned, an outlet for cleaned suspension, and a central immersion pipe are provided. The inlet is arranged below and the outlet above while the separator upwardly tapers considerably, the diameter ratio (D1/D2) of the largest diameter (D1) to the smallest diameter (D2) ranging between 1.2 and 3.
Description
-- 212~36 FLOTATION SYSTEM
The invention relates to a flotation system for cleaning fiber suspensions in the paper industry, with an essentially rotationally symmetric separator for air bubbles with dirt particles clinging thereto, for one, and fibers for another, and with a specifically tangential inlet and outlet for cleaned suspension, and with a central immersion pipe for removal of dirt particles and air. Such a system is known from DE-C 33 06 600. With this system, a multistep injector is used to produce a suspension-air mixture which through the entrance port is tangentially introduced in the flotation vessel, the feeding occurring in the upper part of the flotation vessel, into which extends also the immersion pipe for removal of the air or of the rigid dirt particles that have deposited. With this arrangement it is difficult to make fine air bubbles flow toward the vortex core. Such would increase the flotation capacity, or degree of purification, overall.
The problem underlying the invention is to provide a flotation vessel of this type with improved efficiency.
This problem is inventionally solved by the features of the present invention. The present invention, in one form thereof, provides an arrangement wherein the inlet is arranged below and the outlet is arranged above, while the separator tapers considerably upwardly, with the diameter ratio of the largest diameter to the smallest diameter ranging between 1.2 and 3.
The above-mentioned and other features and advantages of this invention, and the manner of attaining them, will become more apparent and the invention will be better understood by reference to the following ~ 2~2~)~3~) description of the preferred embodiments of the invention taken in conjunction with the accompanying drawings, wherein:
Fig. 1 is an axial section of a first embodiment;
Fig. 2 is an axial section of another embodiment;
Fig. 3 is a cross section relative to Fig. 2, and Fig. 3a-f is a basic illustration of further styles, in axial section.
Corresponding reference characters indicate corresponding parts throughout the several views. The exemplifications set out herein illustrate the preferred embodiments of the invention, and such exemplifications ~
are not to be construed as limiting the scope of the -invention in any manner. ~ -In Fig. 1, the center, separating part 1 of the ~ -flotation veisel, in which air i~ separated from the suspension, is composed of a conic part 1' having the shape of a truncated cone and a cylindrical part 1"
fitted on the conic part. The tangential inlet is referenced 2, and the adjoining entrance part, fashioned cylindrically as well, is referenced 4. The exit part 3 is also cylindrical and has a tangential outlet 5. An immersion pipe 14 protrudes from above into the -~
cylindrical part 1" of the separator 1, at a distance f ~ ~
ranging from 0.8 to 1.2 times the outside diameter d of ~-the immersion pipe 14. A range between 0.2 and 1 may be chosen for the ratio 11/12 of the lengths (heights) of the conic part 1' and cylindrical part 1" of the ~ ;~
separator 1. The overall length 1 of the separator 1 may amount to between 2.5 and 3.5 times the diameter D2 f the cylindrical part 1. The ratio between the maximum diameter Dl and minimum diameter D2 of the separator 1 can preferably amount to between 1.2 and 3. In practice, the overall length of the separator 1 will lie between 0.8 and 2.0 meters. These latter references apply also ; ---` 2~ 20~
to other designs of these flotation systems as illustrated in the figures.
The operating mode of the inventional cyclone is favorable inasmuch as a very high centrifugal acceleration occurs in the upper part 1" of the separator 1, with the small diameter, causing also small bubbles to rise and separate with the adhering dirt particles. But the velocity requires an adjustment such that the printing ink particles clinging to the bubbles will not be separated by excessive shear forces.
Backed by the axial flow component of the suspension, from the bottom up, the foam is transported through the vessel toward the degassing opening, i.e., the immersion pipe. A continuous foam discharge is obtained due to the inner pressure. The described arrangement should be given preference, since after passage of the narrow part 1" of the separator 1 there occurs again a diameter enlargement and retardation of the suspension. Similar outlet parts are favorably used also with the other variants, notably of Fig. 3a-d. The immersion pipe 14 also may be provided favorably with various bores within the separating part or also outlet part, so as to attain an after-degassing by utilization of the secondary flow. The feed velocity of the suspension-air mixture should range between 0.5 and 5 m/s, the axial velocity through the cyclone between 0.1 and 1 m/s.
In a preferred embodiment, immersion pipe has an outside diameter (d), wherein the ratio (d/D2) of the ~
diameter (d) to smallest diameter (D2) of the separator ranges between 0.3 and 0.5. It is preferred that entrance part 4 be cylindrical, and have a diameter at least as large as diameter (Dl). It is also preferred that exit part 3 be cylindrical, and have a diameter at least 10% larger than diameter (D2).
The invention relates to a flotation system for cleaning fiber suspensions in the paper industry, with an essentially rotationally symmetric separator for air bubbles with dirt particles clinging thereto, for one, and fibers for another, and with a specifically tangential inlet and outlet for cleaned suspension, and with a central immersion pipe for removal of dirt particles and air. Such a system is known from DE-C 33 06 600. With this system, a multistep injector is used to produce a suspension-air mixture which through the entrance port is tangentially introduced in the flotation vessel, the feeding occurring in the upper part of the flotation vessel, into which extends also the immersion pipe for removal of the air or of the rigid dirt particles that have deposited. With this arrangement it is difficult to make fine air bubbles flow toward the vortex core. Such would increase the flotation capacity, or degree of purification, overall.
The problem underlying the invention is to provide a flotation vessel of this type with improved efficiency.
This problem is inventionally solved by the features of the present invention. The present invention, in one form thereof, provides an arrangement wherein the inlet is arranged below and the outlet is arranged above, while the separator tapers considerably upwardly, with the diameter ratio of the largest diameter to the smallest diameter ranging between 1.2 and 3.
The above-mentioned and other features and advantages of this invention, and the manner of attaining them, will become more apparent and the invention will be better understood by reference to the following ~ 2~2~)~3~) description of the preferred embodiments of the invention taken in conjunction with the accompanying drawings, wherein:
Fig. 1 is an axial section of a first embodiment;
Fig. 2 is an axial section of another embodiment;
Fig. 3 is a cross section relative to Fig. 2, and Fig. 3a-f is a basic illustration of further styles, in axial section.
Corresponding reference characters indicate corresponding parts throughout the several views. The exemplifications set out herein illustrate the preferred embodiments of the invention, and such exemplifications ~
are not to be construed as limiting the scope of the -invention in any manner. ~ -In Fig. 1, the center, separating part 1 of the ~ -flotation veisel, in which air i~ separated from the suspension, is composed of a conic part 1' having the shape of a truncated cone and a cylindrical part 1"
fitted on the conic part. The tangential inlet is referenced 2, and the adjoining entrance part, fashioned cylindrically as well, is referenced 4. The exit part 3 is also cylindrical and has a tangential outlet 5. An immersion pipe 14 protrudes from above into the -~
cylindrical part 1" of the separator 1, at a distance f ~ ~
ranging from 0.8 to 1.2 times the outside diameter d of ~-the immersion pipe 14. A range between 0.2 and 1 may be chosen for the ratio 11/12 of the lengths (heights) of the conic part 1' and cylindrical part 1" of the ~ ;~
separator 1. The overall length 1 of the separator 1 may amount to between 2.5 and 3.5 times the diameter D2 f the cylindrical part 1. The ratio between the maximum diameter Dl and minimum diameter D2 of the separator 1 can preferably amount to between 1.2 and 3. In practice, the overall length of the separator 1 will lie between 0.8 and 2.0 meters. These latter references apply also ; ---` 2~ 20~
to other designs of these flotation systems as illustrated in the figures.
The operating mode of the inventional cyclone is favorable inasmuch as a very high centrifugal acceleration occurs in the upper part 1" of the separator 1, with the small diameter, causing also small bubbles to rise and separate with the adhering dirt particles. But the velocity requires an adjustment such that the printing ink particles clinging to the bubbles will not be separated by excessive shear forces.
Backed by the axial flow component of the suspension, from the bottom up, the foam is transported through the vessel toward the degassing opening, i.e., the immersion pipe. A continuous foam discharge is obtained due to the inner pressure. The described arrangement should be given preference, since after passage of the narrow part 1" of the separator 1 there occurs again a diameter enlargement and retardation of the suspension. Similar outlet parts are favorably used also with the other variants, notably of Fig. 3a-d. The immersion pipe 14 also may be provided favorably with various bores within the separating part or also outlet part, so as to attain an after-degassing by utilization of the secondary flow. The feed velocity of the suspension-air mixture should range between 0.5 and 5 m/s, the axial velocity through the cyclone between 0.1 and 1 m/s.
In a preferred embodiment, immersion pipe has an outside diameter (d), wherein the ratio (d/D2) of the ~
diameter (d) to smallest diameter (D2) of the separator ranges between 0.3 and 0.5. It is preferred that entrance part 4 be cylindrical, and have a diameter at least as large as diameter (Dl). It is also preferred that exit part 3 be cylindrical, and have a diameter at least 10% larger than diameter (D2).
- 2~2~
The flotation vessel relative to Fig. 2 and 3 has a different inlet 16, namely in the form of an inlet spiral.
Fig. 3a-3f show further designs of the separating part, with a very small cylindrical, upper part fashioned as a truncated cone throughout, with a concave or convex shape, and alternatively as a combination of cylindrical and conic sections.
While this invention has been described as having a preferred design, the present invention can be further modified within the spirit and scope of this disclosure.
This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims.
~....
The flotation vessel relative to Fig. 2 and 3 has a different inlet 16, namely in the form of an inlet spiral.
Fig. 3a-3f show further designs of the separating part, with a very small cylindrical, upper part fashioned as a truncated cone throughout, with a concave or convex shape, and alternatively as a combination of cylindrical and conic sections.
While this invention has been described as having a preferred design, the present invention can be further modified within the spirit and scope of this disclosure.
This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims.
~....
Claims (8)
1. A flotation system for cleaning fiber suspensions, comprising:
a generally rotationally symmetrical separator for air bubbles having dirt particles clinging thereto and for fibers;
a tangential inlet for fiber suspension to be cleaned;
a tangential outlet for cleaned suspension; and a central immersion pipe for removal of dirt particles and air, said central immersion part having two ends, one of said ends protruding from above said separator and the other of said ends extending into said separator;
wherein said inlet is arranged below the separator and the outlet is arranged above the separator; at least a portion of said separator being configured to taper in an upward direction, wherein (D1) represents the largest diameter of said tapering separator and (D2) represents the smallest diameter of said tapering diameter, and wherein the diameter ratio (D1/D2) of said largest diameter (D1) to said smallest diameter (D2) ranges between 1.2 and 3.
a generally rotationally symmetrical separator for air bubbles having dirt particles clinging thereto and for fibers;
a tangential inlet for fiber suspension to be cleaned;
a tangential outlet for cleaned suspension; and a central immersion pipe for removal of dirt particles and air, said central immersion part having two ends, one of said ends protruding from above said separator and the other of said ends extending into said separator;
wherein said inlet is arranged below the separator and the outlet is arranged above the separator; at least a portion of said separator being configured to taper in an upward direction, wherein (D1) represents the largest diameter of said tapering separator and (D2) represents the smallest diameter of said tapering diameter, and wherein the diameter ratio (D1/D2) of said largest diameter (D1) to said smallest diameter (D2) ranges between 1.2 and 3.
2. The flotation system of claim 1, in which said immersion pipe has an outside diameter (d), wherein the ratio (d/D2) of said diameter (d) to said smallest diameter (D2) of said separator ranges between 0.3 and 0.5.
3. The flotation system of claim 1, wherein the immersion pipe has an outside diameter (d) and extends into the separator to an immersion depth (f), said immersion depth (f) being 0.8 to 1.2 times outside diameter (d).
4. The flotation system of claim 2, wherein the immersion pipe extends into the separator to an immersion depth (f), said immersion depth (f) being 0.8 to 1.2 times outside diameter (d) of the immersion pipe.
5. The flotation system of claim 1, wherein said tangential inlet includes an entrance part having a cylindrical configuration, said cylindrical configuration of the entrance part having a diameter at least as large as diameter (D1).
6. The flotation system of claim 1, wherein said tangential outlet includes as exit part having a generally cylindrical configuration, said configuration having a diameter at least 10% larger than diameter (D2).
7. The flotation system of claim 1, wherein said tangential inlet includes an entrance part and the tangential outlet has an exit part, said entrance part being sized such that fiber suspensions entering the flotation system at said entrance part have a velocity ranging between 0.5 and 5 m/s, said separator being sized such that the suspension travels through the separator from said entrance part to said exit part at an axial velocity, said axial velocity ranging between 0.1 and 1 m/s.
8. Flotation system for cleaning fiber suspensions, with a generally rotationally symmetrical separator for air bubbles with dirt particles clinging thereto, and for fibers, and with a specifically tangential inlet for fiber suspensions to be cleaned and an outlet for cleaned suspension, and with a central immersion pipe for removal of dirt particles and air, wherein the improvement comprises:
the inlet is arranged below and the outlet is arranged above the separator, while the separator tapers in an upward direction, with the diameter ratio (D1/D2) of the largest diameter (D1) of the separator to the smallest diameter (D2) of the separator ranging between 1.2 and 3.
the inlet is arranged below and the outlet is arranged above the separator, while the separator tapers in an upward direction, with the diameter ratio (D1/D2) of the largest diameter (D1) of the separator to the smallest diameter (D2) of the separator ranging between 1.2 and 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4310807 | 1993-04-02 | ||
| DEP4310807.5 | 1993-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2120436A1 true CA2120436A1 (en) | 1994-10-03 |
Family
ID=6484547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2120436 Abandoned CA2120436A1 (en) | 1993-04-02 | 1994-03-31 | Flotation system |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0618012B1 (en) |
| JP (1) | JPH0748791A (en) |
| AT (1) | ATE142911T1 (en) |
| BR (1) | BR9400885A (en) |
| CA (1) | CA2120436A1 (en) |
| DE (1) | DE59400653D1 (en) |
| FI (1) | FI941536A (en) |
| NO (1) | NO941197L (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5580446A (en) * | 1994-10-20 | 1996-12-03 | International Paper Company | Screen, vortex apparatus for cleaning recycled pulp and related process |
| US5690812A (en) * | 1993-09-10 | 1997-11-25 | Sulzer-Escher Wyss Gmbh | Process and apparatus for the separation of solid matter via flotation |
| US5770050A (en) * | 1994-07-22 | 1998-06-23 | Voith Sulzer Stoffaufbereitung Gmbh | Flotation apparatus |
| US5776335A (en) * | 1994-09-09 | 1998-07-07 | Forschungszentrum Julich Gmbh | Gas entrainment flotation reactor with arrangements for separating solids from liquids |
| US7108136B2 (en) * | 2001-03-19 | 2006-09-19 | Rainer Imhof | Pneumatic flotation separation device |
| US20100320154A1 (en) * | 2008-01-31 | 2010-12-23 | Sorb-Water Technology As | Method and apparatus for separation of multiphase fluids, and applications thereof |
| CN111206903A (en) * | 2011-11-07 | 2020-05-29 | 哈利伯顿能源服务公司 | Fluid discrimination for use with subterranean wells |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5529190A (en) * | 1995-02-06 | 1996-06-25 | Ahlstrom Machinery, Inc. | Gas sparged hydrocyclone with foam separating vessel |
| US5899342A (en) * | 1997-06-04 | 1999-05-04 | Voith Sulzer Paper Technology North America, Inc. | Hydrocyclone separator |
| DE19803089C2 (en) * | 1998-01-28 | 2001-07-26 | Voith Paper Patent Gmbh | Flotation device for the separation of solids |
| DE19811090A1 (en) | 1998-03-13 | 1999-09-16 | Georg Klas | Cyclone separator for effluent household gray water |
| WO1999049127A1 (en) * | 1998-03-25 | 1999-09-30 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | A process for removing contaminants from waste paper |
| DE19939275A1 (en) | 1999-08-19 | 2001-02-22 | Voith Paper Patent Gmbh | Device and method for degassing a liquid or pasty medium in a machine for producing and / or refining a material web, in particular made of paper or cardboard |
| IT201700070854A1 (en) * | 2017-06-26 | 2018-12-26 | Dellaquila Sergio | Separator cyclone. |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2738782C2 (en) * | 1977-08-27 | 1979-07-12 | J.M. Voith Gmbh, 7920 Heidenheim | Flotation device for removing printing ink |
| US4378289A (en) * | 1981-01-07 | 1983-03-29 | Hunter A Bruce | Method and apparatus for centrifugal separation |
| CH658481A5 (en) * | 1983-02-18 | 1986-11-14 | Escher Wyss Gmbh | FLOTATION DEVICE FOR FLOTING FIBER FIBER SUSPENSION MADE FROM WASTE PAPER. |
| US5080792A (en) * | 1990-08-03 | 1992-01-14 | Amoco Corporation | Apparatus and method for separating fluids |
-
1994
- 1994-03-11 EP EP19940103747 patent/EP0618012B1/en not_active Expired - Lifetime
- 1994-03-11 DE DE59400653T patent/DE59400653D1/en not_active Expired - Fee Related
- 1994-03-11 AT AT94103747T patent/ATE142911T1/en not_active IP Right Cessation
- 1994-03-23 BR BR9400885A patent/BR9400885A/en not_active Application Discontinuation
- 1994-03-30 NO NO941197A patent/NO941197L/en unknown
- 1994-03-31 FI FI941536A patent/FI941536A/en unknown
- 1994-03-31 CA CA 2120436 patent/CA2120436A1/en not_active Abandoned
- 1994-04-01 JP JP6521394A patent/JPH0748791A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5690812A (en) * | 1993-09-10 | 1997-11-25 | Sulzer-Escher Wyss Gmbh | Process and apparatus for the separation of solid matter via flotation |
| US5916446A (en) * | 1993-09-10 | 1999-06-29 | Sulzer-Escher Wyss Gmbh | Process and apparatus for the separation of solid matter via flotation |
| US5770050A (en) * | 1994-07-22 | 1998-06-23 | Voith Sulzer Stoffaufbereitung Gmbh | Flotation apparatus |
| US5776335A (en) * | 1994-09-09 | 1998-07-07 | Forschungszentrum Julich Gmbh | Gas entrainment flotation reactor with arrangements for separating solids from liquids |
| US5580446A (en) * | 1994-10-20 | 1996-12-03 | International Paper Company | Screen, vortex apparatus for cleaning recycled pulp and related process |
| US5707488A (en) * | 1994-10-20 | 1998-01-13 | International Paper Company | Screen/vortex apparatus for cleaning recycled pulp related process |
| US7108136B2 (en) * | 2001-03-19 | 2006-09-19 | Rainer Imhof | Pneumatic flotation separation device |
| AU2001240887B2 (en) * | 2001-03-19 | 2007-05-24 | Maelgwyn Mineral Services Limited | Pneumatic flotation separation device |
| US20100320154A1 (en) * | 2008-01-31 | 2010-12-23 | Sorb-Water Technology As | Method and apparatus for separation of multiphase fluids, and applications thereof |
| US9315394B2 (en) * | 2008-01-31 | 2016-04-19 | Sorbwater Technology As | Method and apparatus for separation of multiphase fluids, and applications thereof |
| CN111206903A (en) * | 2011-11-07 | 2020-05-29 | 哈利伯顿能源服务公司 | Fluid discrimination for use with subterranean wells |
Also Published As
| Publication number | Publication date |
|---|---|
| NO941197L (en) | 1994-10-03 |
| FI941536A (en) | 1994-10-03 |
| BR9400885A (en) | 1994-10-25 |
| EP0618012A1 (en) | 1994-10-05 |
| FI941536A0 (en) | 1994-03-31 |
| ATE142911T1 (en) | 1996-10-15 |
| EP0618012B1 (en) | 1996-09-18 |
| NO941197D0 (en) | 1994-03-30 |
| DE59400653D1 (en) | 1996-10-24 |
| JPH0748791A (en) | 1995-02-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |