EP1193342A1 - Dispositif de flotation à colonne - Google Patents

Dispositif de flotation à colonne Download PDF

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Publication number
EP1193342A1
EP1193342A1 EP00121044A EP00121044A EP1193342A1 EP 1193342 A1 EP1193342 A1 EP 1193342A1 EP 00121044 A EP00121044 A EP 00121044A EP 00121044 A EP00121044 A EP 00121044A EP 1193342 A1 EP1193342 A1 EP 1193342A1
Authority
EP
European Patent Office
Prior art keywords
flotation
flotation device
fraction
blades
suspension
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
Application number
EP00121044A
Other languages
German (de)
English (en)
Other versions
EP1193342B1 (fr
Inventor
Robert Heinz
Lucas Menke
Bernhard Niemczyk
George Troubounis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meri Environmental Solutions GmbH
Original Assignee
Meri Entsorgungstechnik Fuer Die Papierindustrie GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Meri Entsorgungstechnik Fuer Die Papierindustrie GmbH filed Critical Meri Entsorgungstechnik Fuer Die Papierindustrie GmbH
Priority to AT00121044T priority Critical patent/ATE257529T1/de
Priority to EP00121044A priority patent/EP1193342B1/fr
Priority to ES00121044T priority patent/ES2214203T3/es
Publication of EP1193342A1 publication Critical patent/EP1193342A1/fr
Application granted granted Critical
Publication of EP1193342B1 publication Critical patent/EP1193342B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B03D1/1431—Dissolved air flotation machines
    • 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
    • B03D1/1412—Flotation machines with baffles, e.g. at the wall for redirecting settling solids
    • 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
    • B03D1/1481—Flotation machines with a plurality of parallel plates
    • 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
    • B03D1/14—Flotation machines
    • B03D1/1443—Feed or discharge mechanisms for flotation tanks
    • B03D1/1462—Discharge mechanisms for the froth

Definitions

  • the invention relates to a flotation device for separation of substances or mixtures of substances from suspensions for Formation of at least one substance-rich and low-substance fraction with a columnar separation tank that has a suspension inlet below as well as several obliquely arranged one above the other arranged slats, a first exit for the low-cloth Fraction and a second one arranged in the upper area Output for the high-content fraction includes.
  • Such a flotation device is from the publication "Wochenblatt für Textilfabrikation", 1998, Issue 13, page 660 known.
  • Such an arrangement has compared to conventional Flotation arrangements with essentially horizontal Suspension flow the advantage of a much lower Space requirements for the installation, whereas the necessary for it significantly greater height is usually not critical.
  • a suspension flows along the outer walls a cylindrical container upwards, the Clear water between several spaced separating cones radially enters and exits into a central collecting line can be.
  • a disadvantage of this known arrangement is that the clear water flow an increasing due to the direction of flow Experiences flow velocity, which actually causes the particles flowing at the top have a tendency to getting carried away. This reduces the efficiency of the Material separation.
  • Another disadvantage is that consecutive Separation processes, be it flotation processes or coupling of flotation and filtration processes requires separate installation of separate assemblies that then be closed in a row.
  • the object of the invention is to create a generic flotation device, which avoids the disadvantages mentioned above and in particular through an effective separation of the desired substances in the suspension in a low-substance and a substance-rich fraction.
  • the arrangement is also said to be compact enable functional series connection of several isolators.
  • the main advantages of the invention are that by arranging the vertical flow radially upwards and the arrangement of the fins radially outside the main flow the flow of the lean fraction is directed radially outwards and is slowing down, which is a better separation of the particles.
  • Another advantage is that the low-fraction on the outer circumference, that is, collected behind the downstream edges of the fins , which means that additional separation stages are required with a small footprint can be provided, be it as additional flotation or as filtration levels.
  • the separation tank has a circular cross-section.
  • other cross-sectional shapes are also required possible, especially a polygonal, especially triangular or square cross section.
  • the separation tank is usually cylindrical his. If there is a large accumulation due to technical reasons of the substance-rich fraction in the upper area can be a funnel-like or conical design of the main flow channel, that is, a radial reset of those further up Front slat edges should be appropriate.
  • the invention is radial at least one further arrangement outside the collecting duct several second slats provided one above the other arranged in cascade, with the collecting channel between the downstream edges of the former and the upstream edges of the second fins is formed.
  • This arrangement enables an improved separation of the suspension and in particular the derivation of a first sub-fraction after the first flotation step and the derivation of the Residual fraction after the second flotation step.
  • Inlet openings are preferably at the lower end of the collecting duct for the introduction of chemicals and / or Bubble fluid mixtures provided a selective (in particular by means of collective adsorption or hydrophobization) and / or a non-selective flotation principle for use bring to.
  • the lamellae in the form of closed conical rings A special one there is good separation of the fractions if the Slats an angle of inclination to the horizontal of 10 ° -40 °, preferably have 20 ° -30 °. It is also advantageous if the length of the lamellae in the direction of flow of the lean fabrics Fraction is 1 to 4 times the width of the through the inner edges of the fins delimited main flow channel. The distance between adjacent slats can be from below increase towards the top to accommodate the different flow and consistency ratios in the lower and upper range separation tank.
  • At least some of the slats can expediently be used be wavy, the waves in the circumferential direction run, so that this does not affect the flow the low-fraction fraction is connected.
  • This training has the advantage of a considerably higher rigidity of the slats.
  • a particularly advantageous development of the invention provides before that at least part of the slats as a multilayer, preferably honeycomb structure with two outer layers and in between arranged connection structures is formed, wherein preferably continuous flow channels between the Outer layers are formed. This results in an essential higher strength of the slats.
  • the suspension inlet comprises a feed line with a radial outlet device to generate an outflow in radial direction and this is connected from one to one centric passage, preferably conical dome is covered so that the suspension is centered over the passage enters the separation tank. In this way, one favorable introduction of the suspension into the lower area of the Separation tanks causes.
  • a first embodiment of the invention is shown schematically in axial longitudinal section, thus a flotation device 10a.
  • this essentially comprises an inflow unit 12, a material separation unit 14, a discharge unit 16 for the substance-rich fraction and a first collecting area 18 for the substance-poor fraction.
  • a second collection area 20 for solid particles is also provided.
  • a feed line 22 for the suspension to be separated leads into a plurality of separate or an annular outlet 24 which are provided with baffle plates 26 .
  • a feed line 22 or the area of the outlets 24 there is preferably a feed line (not shown) for a liquid containing gas bubbles for non-selective flotation and / or chemical substances for selective flotation.
  • the material separation unit 14 is essentially formed by a cylindrical separation tank 28 , in the central area of which a vertical main flow channel 30 is formed, which extends from the inflow unit 12 to the discharge unit 16
  • a number of axially spaced lamellae 32 are provided one above the other, which are annularly conical and define between them a radially outward and obliquely downward flow for the lean fraction towards the first collecting area 18 .
  • This annular first collecting area 18 which is formed between the wall of the separation tank 28 and the downstream edges of the fins 32 , leads to a collecting space 34 arranged above the uppermost fin 32 for a first low-fraction, in which a first collecting tube 36 for this first low-material fraction Group is provided.
  • a simple one-stage embodiment of the invention would get along with the assemblies shown so far, the first header tube 36 in such a simple embodiment not necessarily being provided at the top but also elsewhere, for example at the bottom.
  • FIG. 1 The embodiment shown in Figure 1 includes in addition to previously discussed flotation - a filtration stage that will now be described.
  • a filter outer wall 38 Radially outside concentrically the wall of the separation tank 28 , a filter outer wall 38 is provided at a certain distance, so that an annular, essentially cylindrical filter space 40 is formed between the two.
  • the filter space is filled with a filter material, preferably sand of a certain consistency or other filter substances such as activated carbon or mixtures thereof.
  • This filter chamber 40 comprises in its upper end region a second collecting pipe 42 for a second low-fraction, which is obtained after a flotation and a subsequent filtration step.
  • a filter material regeneration unit 44 (not shown in more detail), which has the task of cleaning or regenerating filter material and conveying the regenerated filter material into the filter space 40 .
  • the filter material passes through the filter space 40 and arrives in a discharge channel 46, from where it is fed back to the filter material regeneration unit 44 via the schematically indicated line 48 in the used state.
  • the filter material regeneration unit 44 comprises at least one discharge line 47 for a second substance-rich fraction, which is produced by the material separation on the filter material located in the filter space 40 when it is regenerated.
  • the filter chamber 40 is connected via one or more connection openings 50 to the first collecting area 18 , via which the fraction enters the filter area that has already passed through the flotation area and is not discharged via the first collecting pipe 36 .
  • the discharge unit 16 essentially consists of a widening collecting channel 52 for the substance-rich fraction, which leads to one or more collecting channels or pipes 54 .
  • one or more conveying devices 56 are provided in order to better convey the material-rich, mostly sludge-shaped fraction from the collecting channel 52 into the collecting channel 54 .
  • a collecting device 58 is provided below the material separation unit 14, preferably functionally combined with the inflow unit 12 , a collecting device 58 is provided for the sedimentation of heavy particles, which opens into a sediment outlet 60 .
  • a suspension flows, to which chemical substances and / or gas bubbles can be added, to the outlets 24 and is deflected by means of the baffle plates 26 in such a way that when entering the inflow unit 12 , a horizontal flow initially occurs, which occurs when entering the main flow channel 30 changes into a radial main flow.
  • This process is supported by the conical shape of the lowest lamella 32 .
  • the type of generation and the location of the introduction of gas bubbles or the number and size of the bubbles determine the type of flotation (pressure relaxation or dispersion flotation).
  • the desired substances from the suspension separate under the action of the supplied gas bubbles and / or chemical substances on the way up into a substance-rich fraction flowing upwards and a substance-poor fraction flowing radially through the lamellae 32 .
  • the material-rich fraction which is usually sludge-shaped, can be discharged via the collecting troughs 54 after collection in the discharge unit by means of the conveying devices 56 .
  • This substance-rich fraction can either contain undesirable substances such as ash or ink particles, in the recycling of waste paper (is then usually referred to as reject fraction) or else valuable substances, for example in the extraction of ore or minerals.
  • the fraction of poorer material branched off radially from the main flow in the main flow channel 30 reaches the first collecting area 18 after flowing through the annular spaces formed between the fins 32 . If - unlike in the embodiment shown in FIG. 1 - no further filtration process follows - this is the desired low-fraction which is removed via the first collecting pipe 36 .
  • this partial fraction flows through the connection openings 50 into the filter space 40 and from there in the vertical direction upwards, in counterflow to the filter material flow, which is from top to bottom runs.
  • a second low-fraction can then be removed via the second collecting pipe 42 , from which the filtered substances are removed compared to the fraction that can be discharged via the first collecting pipe 36 , which in turn are removed from the system via the discharge line 47 .
  • the filter material circulates between the filter space 40 and the filter material regeneration unit 44 .
  • the heavy particles obtained during the separation for example iron parts, fall into the sedimant collecting device 58 and then into the sediment outlet 60 .
  • FIG. 2 shows an alternative embodiment of the invention in the form of a flotation device 10b , which differs from the embodiment according to FIG. 1 in that two flotation stages are arranged one behind the other.
  • the same reference numerals designate the same components. To avoid repetition, reference is made to the above description insofar as it relates to the first flotation step.
  • FIG. 2 differs from that of FIG. 1 in that a second group of fins 62 is arranged radially outside the first collecting area 18 , radially outside of which a third collecting area 64 is provided.
  • first slats 32 and the second slats 62 have the same distances and inclinations, it is not necessary. Rather, the number, shape, inclination, etc. of the second slats 62 can be selected independently of that of the first slats 32 depending on the specific conditions.
  • a feed pipe 66 is provided at the lower end of the first annular collecting area 18 , via which a liquid or chemical substances mixed with gas bubbles are supplied in order to achieve certain flotation conditions in the first collecting area 18 .
  • a third collecting pipe 68 Arranged above the third collecting area 64 is a third collecting pipe 68 for collecting a second low-fraction, which, in contrast to the fraction that can be removed via the first collecting pipe 36, is further freed of substances to be separated.
  • collector pipes 36, 42, 68 any form of collector device is intended to be understood.
  • it can also be a matter of a plurality of tubes or openings which are provided in walls and only open into collecting tubes outside the wall.
  • FIGS. 3a and 3b show two shapes for slats 32, 62 , which are useful instead of simple flat shapes.
  • 3a shows a honeycomb-like structure with two outer surfaces 70a and 70b , between which connecting struts 72 are provided, the gray areas being intended to represent shadows.
  • the cavities formed between adjacent connecting struts 72 preferably form continuous lines via which part of the flow can also take place.
  • FIG. 3b shows a wave-like configuration of the fins 32, 62 , the direction of flow being indicated by an arrow, that is to say parallel to the wavefront.
  • FIG. 4 An arrangement of three successive flotation stages is shown schematically in FIG. 4, which would look similar to the embodiment of FIG. 2, except that 64 further lamellae would be radially outside the third collecting area.
  • the central axis a not shown in FIGS. 1 and 2, shows that one side is not shown completely here.
  • further slats 74 of a further flotation stage are provided in this embodiment, which preferably have a different distance between adjacent slats.
  • a fourth collecting space 76 which is only schematically indicated, is then provided radially outside of the lamellae 74 for an even lower-fraction.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Paper (AREA)
  • Physical Water Treatments (AREA)
EP00121044A 2000-09-27 2000-09-27 Dispositif de flotation à colonne Expired - Lifetime EP1193342B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT00121044T ATE257529T1 (de) 2000-09-27 2000-09-27 Säulen-flotationsvorrichtung
EP00121044A EP1193342B1 (fr) 2000-09-27 2000-09-27 Dispositif de flotation à colonne
ES00121044T ES2214203T3 (es) 2000-09-27 2000-09-27 Dispositivo para flotacion en columna.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00121044A EP1193342B1 (fr) 2000-09-27 2000-09-27 Dispositif de flotation à colonne

Publications (2)

Publication Number Publication Date
EP1193342A1 true EP1193342A1 (fr) 2002-04-03
EP1193342B1 EP1193342B1 (fr) 2004-01-07

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Family Applications (1)

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EP00121044A Expired - Lifetime EP1193342B1 (fr) 2000-09-27 2000-09-27 Dispositif de flotation à colonne

Country Status (3)

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EP (1) EP1193342B1 (fr)
AT (1) ATE257529T1 (fr)
ES (1) ES2214203T3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005099857A1 (fr) 2004-04-16 2005-10-27 Nijhuis Water Technology B.V. Dispositif separateur
WO2008028650A1 (fr) * 2006-09-06 2008-03-13 Meri Entsorgungstechnik für die Papierindustrie GmbH procédé d'adoucissement d'un liquide ou d'une dispersion
DE102007020029A1 (de) 2007-04-27 2008-10-30 Meri Entsorgungstechnik für die Papierindustrie GmbH Flotationsvorrichtung mit Lochplatte
AT509908A3 (de) * 2010-05-28 2015-03-15 Metso Paper Inc Flotationszelle und verfahren zum druckfarbenentfernen bzw. deinken von fasersuspension
CN105537239A (zh) * 2015-12-25 2016-05-04 安徽继宏环保科技有限公司 一种城镇生活垃圾处理系统的立式螺旋气浮机
CN112320916A (zh) * 2020-09-24 2021-02-05 宁波方太厨具有限公司 矿物质滤料及其制备方法和具有该矿物质滤料的滤芯及该滤芯的水质矿化方法
EP3308844B1 (fr) * 2016-02-25 2023-07-05 Yin Xu Appareil de concentration d'écume

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1300082B (de) * 1964-06-26 1969-07-31 Saranin Alexander Peter Vorrichtung zur Schwemmklaerung von Zuckerpulpen und Schwemmverfahren unter Verwendung dieser Vorrichtung
US5080780A (en) * 1988-10-11 1992-01-14 Process Development Company Single cell vertical static flow flotation unit cross-reference to related applications
WO1992017260A1 (fr) * 1991-03-27 1992-10-15 Jack Baggaley Appareil de traitement
US5294003A (en) * 1990-09-26 1994-03-15 Hollingsworth Clinton A Process for concentration of minerals
US5897772A (en) * 1995-12-22 1999-04-27 Chiang; Shiao-Hung Multi-stage flotation column
DE19915735A1 (de) * 1999-04-08 2000-10-19 Meri Entsorgungstech Papierind Säulen-Flotationsvorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1300082B (de) * 1964-06-26 1969-07-31 Saranin Alexander Peter Vorrichtung zur Schwemmklaerung von Zuckerpulpen und Schwemmverfahren unter Verwendung dieser Vorrichtung
US5080780A (en) * 1988-10-11 1992-01-14 Process Development Company Single cell vertical static flow flotation unit cross-reference to related applications
US5294003A (en) * 1990-09-26 1994-03-15 Hollingsworth Clinton A Process for concentration of minerals
WO1992017260A1 (fr) * 1991-03-27 1992-10-15 Jack Baggaley Appareil de traitement
US5897772A (en) * 1995-12-22 1999-04-27 Chiang; Shiao-Hung Multi-stage flotation column
DE19915735A1 (de) * 1999-04-08 2000-10-19 Meri Entsorgungstech Papierind Säulen-Flotationsvorrichtung

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005099857A1 (fr) 2004-04-16 2005-10-27 Nijhuis Water Technology B.V. Dispositif separateur
US7485223B2 (en) 2004-04-16 2009-02-03 Nijhuis Water Technology B.V. Separator device
WO2008028650A1 (fr) * 2006-09-06 2008-03-13 Meri Entsorgungstechnik für die Papierindustrie GmbH procédé d'adoucissement d'un liquide ou d'une dispersion
DE102007020029A1 (de) 2007-04-27 2008-10-30 Meri Entsorgungstechnik für die Papierindustrie GmbH Flotationsvorrichtung mit Lochplatte
US8540884B2 (en) 2007-04-27 2013-09-24 Meri Entsorgungstechnik Fuer Die Papierindustrie Gmbh Flotation apparatus with apertured plate
AT509908A3 (de) * 2010-05-28 2015-03-15 Metso Paper Inc Flotationszelle und verfahren zum druckfarbenentfernen bzw. deinken von fasersuspension
AT509908B1 (de) * 2010-05-28 2015-05-15 Metso Paper Inc Flotationszelle und verfahren zum druckfarbenentfernen bzw. deinken von fasersuspension
CN105537239A (zh) * 2015-12-25 2016-05-04 安徽继宏环保科技有限公司 一种城镇生活垃圾处理系统的立式螺旋气浮机
EP3308844B1 (fr) * 2016-02-25 2023-07-05 Yin Xu Appareil de concentration d'écume
CN112320916A (zh) * 2020-09-24 2021-02-05 宁波方太厨具有限公司 矿物质滤料及其制备方法和具有该矿物质滤料的滤芯及该滤芯的水质矿化方法
CN112320916B (zh) * 2020-09-24 2022-03-18 宁波方太厨具有限公司 矿物质滤料的滤芯及该滤芯的水质矿化方法

Also Published As

Publication number Publication date
ATE257529T1 (de) 2004-01-15
EP1193342B1 (fr) 2004-01-07
ES2214203T3 (es) 2004-09-16

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