DE3524071A1 - Process and device for the flotation of fibre suspensions - Google Patents
Process and device for the flotation of fibre suspensionsInfo
- Publication number
- DE3524071A1 DE3524071A1 DE19853524071 DE3524071A DE3524071A1 DE 3524071 A1 DE3524071 A1 DE 3524071A1 DE 19853524071 DE19853524071 DE 19853524071 DE 3524071 A DE3524071 A DE 3524071A DE 3524071 A1 DE3524071 A1 DE 3524071A1
- Authority
- DE
- Germany
- Prior art keywords
- suspension
- flotation
- container
- washing
- stage
- 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.)
- Granted
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 34
- 238000005188 flotation Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000835 fiber Substances 0.000 title claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract 11
- 238000007872 degassing Methods 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 2
- 238000003958 fumigation Methods 0.000 claims 2
- 238000013022 venting Methods 0.000 claims 2
- 238000009434 installation Methods 0.000 claims 1
- 238000007790 scraping Methods 0.000 claims 1
- 238000005273 aeration Methods 0.000 abstract 3
- 238000009826 distribution Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
- 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
- B03D1/1406—Flotation machines with special arrangement of a plurality of flotation cells, e.g. positioning a flotation cell inside another
-
- 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
- B03D1/1475—Flotation tanks having means for discharging the pulp, e.g. as a bleed stream
-
- 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
- B03D1/24—Pneumatic
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
- D21F1/70—Pulp catching, de-watering, or recovering; Re-use of pulp-water by flotation
-
- 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
- B03D1/02—Froth-flotation processes
- B03D1/028—Control and monitoring of flotation processes; computer models therefor
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Paper (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Flotation von Fasersuspensionen entsprechend dem Oberbegriff des Patent anspruches 1, sowie Einrichtungen zur Durchführung dieses Verfahrens.The invention relates to a method for flotation of Fiber suspensions according to the preamble of the patent Claim 1, and facilities for carrying out this Procedure.
Es ist eine Einrichtung zur Durchführung des Verfahrens (nach Patentanmeldung Nr. p 31 27 290.8 vom 10. Juli 1981) bekanntgeworden. Bei dieser Einrichtung wird die gesamte Suspensionsmenge am Boden des Flotationsbehälters über einen Injektor zugeführt. Durch die nur unzureichende Ausnützung der Luft arbeitet die Anlage mit unbefriedi gendem Wirkungsgrad.It is a facility to carry out the procedure (after patent application No. p 31 27 290.8 dated July 10, 1981) known. With this facility, the entire Amount of suspension at the bottom of the flotation tank fed an injector. Due to the insufficient Using the air, the system works with unsatisfied efficiency.
Nach der Erfindung wird ein Flotationsverfahren vorge schlagen, bei dem die eingebrachte Luft mehrmals verwendet wird, sowie Einrichtungen, die die Ausführung dieses Verfahrens auf einfache Weise gestatten.According to the invention, a flotation process is featured beat, using the air introduced several times will, as well as facilities that carry out this Allow procedure in a simple manner.
Der Energiebedarf einer Flotationsanlage hängt neben der erforderlichen Durchsatzmenge ausschließlich von der, z. B. durch einen Injektor, zugeführten Luftmenge ab und kann durch mehrmalige Verwendung der Luft wesentlich reduziert werden. Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale der Patentansprüche 1 bis 5 gelöst. Besonders zweckmäßige erfindungsmäßige Ein richtungen ergeben sich durch die Unteransprüche 6 bis 14. Nachfolgend wird das erfindungsgemäße Verfahren anhand der dazu entwickelten Einrichtungen gemäß den Figuren erläutert, welche im einzelnen verschiedene Ausführungs formen dieser Einrichtungen zeigen, wobei die mit jeweils "b" bezeichnete Figur die entsprechende Draufsicht der jeweiligen Ausführungsform darstellt. In den Figuren ist mit 1 bzw. 1′ bzw. 1′′ oder 1′′′ der als stehender Zylinder ausgeführte Flotationsbehälter bezeichnet, in welchem die neu zu reinigende Suspensionsmenge im oberen bzw. mittleren Teil des Flotationsbehälters nahezu tangential zugeführt wird. Durch die dadurch erreichte Rotationsbewegung wird der Neustoff gleichmäßig durch die im unteren Teil des Flotationsbehälters eingebrachte Frischluft zum ersten mal ausgewaschen. In der anschließenden Ringkammer 2-2′-2′′- 2′′′ wird die Suspension vollkommen entlüftet, indem die abwärtsgehende Strömung so gewählt wird, daß die senkrechte Komponente kleiner ist als die Aufstiegs geschwindigkeit der Luftbläschen, und zwar auch derer, an die sich bereits Schmutzpartikel angelagert haben sollten. Der so vorgereinigte Stoff wird mit einer gewissen Zirkulationsmenge der Druckerhöhungspumpe 3-3′- 3′′-3′′′ zugeführt, die den Begasungsapparat 4-4′-4′′-4′′′ speist, in welchem die Frischluft in die Suspensionsmenge ein gemischt wird.The energy requirement of a flotation plant depends not only on the required throughput, but also on the. B. by an injector, the amount of air supplied and can be significantly reduced by repeated use of the air. This object is achieved by the characterizing features of claims 1 to 5. Particularly expedient devices according to the invention result from subclaims 6 to 14. The method according to the invention is explained below with the aid of the devices developed for this purpose according to the figures, which show various execution forms of these devices in detail, the figure denoted in each case by “b” correspondingly Top view of the respective embodiment. In the figures, 1 or 1 ' or 1'' or 1''' of the flotation tank designed as a standing cylinder is referred to, in which the newly cleaned suspension amount in the upper or middle part of the flotation tank is supplied almost tangentially. As a result of the rotational movement thus achieved, the new substance is washed out evenly for the first time by the fresh air introduced into the lower part of the flotation container. In the subsequent annular chamber 2 - 2 ' - 2'' - 2''' the suspension is completely deaerated by choosing the downward flow so that the vertical component is less than the rate of ascent of the air bubbles, including those at that should have already accumulated dirt particles. The pre-cleaned material is fed with a certain circulation amount of the booster pump 3 - 3 ' - 3'' - 3''' , which feeds the gassing device 4 - 4 ' - 4'' - 4''' , in which the fresh air into the Amount of suspension is mixed.
Um eine gleichmäßige Belüftung des ganzen Behälter querschnittes zu erreichen, wird ein in der Mittelachse des Behälters angeordneter zentraler Austritt 5-5′-5′′-5′′′ mit radialen-horizontalen Strömungslinien oder viele auf dem Umfang gleichmäßig verteilte Luft-Suspensions- Austritte 6-6′-6′′-6′′′, auf einer Ebene angeordnet, mit horizontalen und nahezu tangentialen Strömungslinien, vorgesehen. Die Luft-Stoff Suspension wird im unteren Teil des Flotationsbehälters zugeführt.In order to achieve uniform ventilation of the entire container cross-section, a central outlet 5 - 5 ′ - 5 ′ ′ - 5 ′ ′ ′ arranged in the central axis of the container is provided with radial-horizontal flow lines or many air suspension distributions evenly distributed over the circumference. Exits 6 - 6 ' - 6'' - 6''' , arranged on one level, with horizontal and almost tangential flow lines, provided. The air-substance suspension is fed into the lower part of the flotation tank.
Die Lage der horizontalen Ausströmung ist in den Fig. 2a-3a-4a so gewählt, daß die zunächst wenig von der Horizontalen abweichenden Strömungslinien sich an schließend in eine aufwärts- und eine abwärtsgehende Strömung teilen können. Dabei ist der Querschnitt der Ringkammer 7′-7′′-7′′′ des Flotationsbehälters so gewählt, daß die senkrechte Komponente der Abwärtsströmung kleiner ist als die Aufstiegsgeschwindigkeit der Luft bläschen, und zwar auch derer, an die sich bereits Schmutzpartikel angelagert haben.The position of the horizontal outflow is chosen in FIGS . 2a-3a-4a so that the flow lines, which initially differ little from the horizontal, can then be divided into an upward and a downward flow. The cross section of the annular chamber 7 ' - 7'' - 7''' of the flotation tank is chosen so that the vertical component of the downward flow is smaller than the rate of rise of the air bubbles, including those to which dirt particles have already accumulated.
In Fig. 1a ist die Lage der horizontalen Ausströmung so gewählt, daß die zunächst wenig von der Horizontalen abweichenden Strömungslinien sich ausschließlich in eine aufwärtsgehende Strömung umformen.In Fig. 1a, the position of the horizontal outflow is selected so that the flow lines, which initially differ little from the horizontal, are converted exclusively into an upward flow.
In der anschließenden Ringkammer 7 wird der Fertigstoff vollkommen entlüftet, indem die abwärts gehende Strömung so gewählt wird, daß die senkrechte Komponente kleiner ist als die Aufstiegsgeschwindigkeit der Luftbläschen, und zwar auch derer, an die sich bereits Schmutzpartikel an gelagert haben sollten.In the subsequent annular chamber 7 , the finished material is completely deaerated by choosing the downward flow so that the vertical component is less than the rate of ascent of the air bubbles, including those to which dirt particles should have already accumulated.
Bei den unter den Fig. 1a-2a-3a-4a dargestellten Verfahren wird der zu behandelnde Stoff zuletzt mit unverbrauchter Frischluft ausgewaschen, bevor die Suspensi onsmenge als Fertigstoff die Flotationszelle verläßt. Der Flotationsschaum sammelt sich oberhalb des Suspensions niveaus und kann durch die Rotation der Flüssigkeit leicht am Umfang abgeführt werden.In the method shown in FIGS . 1a-2a-3a-4a, the substance to be treated is last washed out with fresh fresh air before the suspension quantity as finished substance leaves the flotation cell. The flotation foam collects above the suspension level and can be easily removed from the circumference by rotating the liquid.
Ein weiterer Vorteil der erfindungsgemäßen Einrichtung ist, daß die Durchsatzmenge über einen weiten Bereich reduziert werden kann. Um kraftwirtschaftlich bei reduzierter Produktion günstig zu liegen, wird empfohlen, die Druckerhöhungspumpe mit einem variablen Antrieb zu versehen.Another advantage of the device according to the invention is that the throughput over a wide range can be reduced. To economically at reduced production, it is recommended the booster pump with a variable drive Mistake.
Bei den unter den Fig. 3a und 4a dargestellten An ordnungen für mehr als zweimalige Verwendung der Luft werden eine oder mehrere Auswaschstufen hinzugefügt. Die erfindungsgemäße Einrichtung hat den Vorteil, daß ohne zusätzliche Einrichtung eine automatische Umwälzung der zu reinigenden Suspensionsmenge erfolgt, aufgrund des unterschiedlichen spezifischen Gewichtes der mit Luft angereicherten Suspensionsmenge und der entlüfteten Suspensionsmenge.In the arrangements shown in FIGS . 3a and 4a for more than two uses of air, one or more washout stages are added. The device according to the invention has the advantage that, without additional device, the suspension amount to be cleaned is automatically circulated, owing to the different specific weight of the suspension amount enriched with air and the deaerated suspension amount.
Zur Unterstützung der Rotation in der Flotationszelle kann eine Teilmenge 6-6′-6′′-6′′′ mit oder ohne zusätzlicher Belüftung tangential zugeführt werden.To support the rotation in the flotation cell, a subset 6 - 6 ' - 6'' - 6''' can be added tangentially with or without additional ventilation.
In Fig. 5 ist die Anordnung für eine Anlage mit mehr als einer Zelle dargestellt. Als Niveauregelung wird ein Überlaufkasten vorgeschlagen.In FIG. 5, the arrangement is shown for a system with more than one cell. An overflow box is proposed as a level control.
Claims (15)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853524071 DE3524071A1 (en) | 1985-07-05 | 1985-07-05 | Process and device for the flotation of fibre suspensions |
| JP61156350A JPS6257680A (en) | 1985-07-05 | 1986-07-04 | Flotation method of fiber suspension and device for executing said method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853524071 DE3524071A1 (en) | 1985-07-05 | 1985-07-05 | Process and device for the flotation of fibre suspensions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3524071A1 true DE3524071A1 (en) | 1987-01-15 |
| DE3524071C2 DE3524071C2 (en) | 1987-08-13 |
Family
ID=6275046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19853524071 Granted DE3524071A1 (en) | 1985-07-05 | 1985-07-05 | Process and device for the flotation of fibre suspensions |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS6257680A (en) |
| DE (1) | DE3524071A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5116488A (en) * | 1990-08-28 | 1992-05-26 | Kamyr, Inc. | Gas sparged centrifugal device |
| US5192423A (en) * | 1992-01-06 | 1993-03-09 | Hydro Processing & Mining Ltd. | Apparatus and method for separation of wet particles |
| US5224604A (en) * | 1990-04-11 | 1993-07-06 | Hydro Processing & Mining Ltd. | Apparatus and method for separation of wet and dry particles |
| EP0634519A1 (en) * | 1993-07-05 | 1995-01-18 | COMER S.p.A. | Reactor for removing impurities from a liquid |
| FR2717192A1 (en) * | 1994-03-11 | 1995-09-15 | Lamort E & M | Method for deinking paper pulp and apparatus for carrying out this method. |
| AU680044B2 (en) * | 1994-10-17 | 1997-07-17 | Comer S.P.A. | Reactor for removing impurities from a liquid |
| US6197153B1 (en) | 1997-12-15 | 2001-03-06 | E & M Lamort | Method for de-inking paper pulp from recycled paper |
| WO2013110383A1 (en) * | 2012-01-23 | 2013-08-01 | Voith Patent Gmbh | Flotation process with foam return |
| WO2016193604A1 (en) | 2015-06-02 | 2016-12-08 | Coatex | Method for deinking waste paper |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19906327A1 (en) * | 1999-02-16 | 2000-08-17 | Voith Sulzer Papiertech Patent | Process for removing impurities from an aqueous fiber suspension |
| CN106269294A (en) * | 2016-08-17 | 2017-01-04 | 北矿机电科技有限责任公司 | A kind of aerating device of agitation impeller flotator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4066540A (en) * | 1974-09-12 | 1978-01-03 | Agency Of Industrial Science & Technology | Apparatus and method for continuous froth flotation |
| US4186094A (en) * | 1976-04-12 | 1980-01-29 | Swemac S.A. | Apparatus for eliminating by flotation impurities in the form of solid particles contained in a liquid |
| DE2836496C2 (en) * | 1978-08-21 | 1982-05-13 | E. & M. Lamort S.A., 51300 Vitry-le-François, Marne | Process and device for deinking pulp suspensions |
| DE3127290A1 (en) * | 1981-07-10 | 1983-01-27 | J.M. Voith Gmbh, 7920 Heidenheim | FLOTATION DEVICE FOR PROCESSING WASTE PAPER |
| DE3243223C1 (en) * | 1982-11-23 | 1984-05-24 | J.M. Voith Gmbh, 7920 Heidenheim | Process and device for flotation of fiber suspensions |
-
1985
- 1985-07-05 DE DE19853524071 patent/DE3524071A1/en active Granted
-
1986
- 1986-07-04 JP JP61156350A patent/JPS6257680A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4066540A (en) * | 1974-09-12 | 1978-01-03 | Agency Of Industrial Science & Technology | Apparatus and method for continuous froth flotation |
| US4186094A (en) * | 1976-04-12 | 1980-01-29 | Swemac S.A. | Apparatus for eliminating by flotation impurities in the form of solid particles contained in a liquid |
| DE2836496C2 (en) * | 1978-08-21 | 1982-05-13 | E. & M. Lamort S.A., 51300 Vitry-le-François, Marne | Process and device for deinking pulp suspensions |
| DE3127290A1 (en) * | 1981-07-10 | 1983-01-27 | J.M. Voith Gmbh, 7920 Heidenheim | FLOTATION DEVICE FOR PROCESSING WASTE PAPER |
| DE3243223C1 (en) * | 1982-11-23 | 1984-05-24 | J.M. Voith Gmbh, 7920 Heidenheim | Process and device for flotation of fiber suspensions |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5224604A (en) * | 1990-04-11 | 1993-07-06 | Hydro Processing & Mining Ltd. | Apparatus and method for separation of wet and dry particles |
| US5116488A (en) * | 1990-08-28 | 1992-05-26 | Kamyr, Inc. | Gas sparged centrifugal device |
| US5192423A (en) * | 1992-01-06 | 1993-03-09 | Hydro Processing & Mining Ltd. | Apparatus and method for separation of wet particles |
| US5454935A (en) * | 1993-07-05 | 1995-10-03 | Comer S.P.A. | Reactor for removing impurities from a liquid |
| EP0634519A1 (en) * | 1993-07-05 | 1995-01-18 | COMER S.p.A. | Reactor for removing impurities from a liquid |
| US5571422A (en) * | 1993-07-05 | 1996-11-05 | Comer S.P.A. | Method for removing impurities from a liquid |
| FR2717192A1 (en) * | 1994-03-11 | 1995-09-15 | Lamort E & M | Method for deinking paper pulp and apparatus for carrying out this method. |
| EP0674040A1 (en) * | 1994-03-11 | 1995-09-27 | E & M LAMORT | Process for de-inking paper pulp and apparatus for the application of the process |
| US5650044A (en) * | 1994-03-11 | 1997-07-22 | E & M Lamort | Paper-pulp deinking method and equipment to implement this method |
| US5979665A (en) * | 1994-03-11 | 1999-11-09 | E & M Lamort | Paper-pulp deinking method and equipment to implement this method |
| AU680044B2 (en) * | 1994-10-17 | 1997-07-17 | Comer S.P.A. | Reactor for removing impurities from a liquid |
| US6197153B1 (en) | 1997-12-15 | 2001-03-06 | E & M Lamort | Method for de-inking paper pulp from recycled paper |
| WO2013110383A1 (en) * | 2012-01-23 | 2013-08-01 | Voith Patent Gmbh | Flotation process with foam return |
| AT14542U1 (en) * | 2012-01-23 | 2016-01-15 | Voith Patent Gmbh | Foam recycling |
| WO2016193604A1 (en) | 2015-06-02 | 2016-12-08 | Coatex | Method for deinking waste paper |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3524071C2 (en) | 1987-08-13 |
| JPS6257680A (en) | 1987-03-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8363 | Opposition against the patent | ||
| 8365 | Fully valid after opposition proceedings | ||
| 8339 | Ceased/non-payment of the annual fee |