EP0278260B1 - Spuckstoffsortierer - Google Patents

Spuckstoffsortierer Download PDF

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Publication number
EP0278260B1
EP0278260B1 EP88100660A EP88100660A EP0278260B1 EP 0278260 B1 EP0278260 B1 EP 0278260B1 EP 88100660 A EP88100660 A EP 88100660A EP 88100660 A EP88100660 A EP 88100660A EP 0278260 B1 EP0278260 B1 EP 0278260B1
Authority
EP
European Patent Office
Prior art keywords
screening
machine according
screen
compartment
rotor
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.)
Expired - Lifetime
Application number
EP88100660A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0278260A2 (de
EP0278260A3 (en
Inventor
Walter Musselmann
Herbert Kinzler
Reimund Rienecker
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT88100660T priority Critical patent/ATE61429T1/de
Publication of EP0278260A2 publication Critical patent/EP0278260A2/de
Publication of EP0278260A3 publication Critical patent/EP0278260A3/de
Application granted granted Critical
Publication of EP0278260B1 publication Critical patent/EP0278260B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/20—Stationary drums with moving interior agitators

Definitions

  • the invention relates to a sorting apparatus according to the preamble of patent claim 1.
  • a sorting apparatus according to the preamble of patent claim 1.
  • Such an apparatus has become known from GB 372 760.
  • the fiber suspension is passed through three structurally and functionally connected sorting units without pressure.
  • the orifice provided here between two adjacent sorting units represents a certain block for the flow of the suspension from a sieve space into the downstream one, in that this orifice exerts a throttling effect. A sensitive influence on the events in the two adjacent sorting units is not possible.
  • US Pat. No. 3,898,157 discloses an apparatus in which two sorting units are also provided. The entire facility is under pressure. With this facility, no precautions have been taken to properly process material suspensions with different production quantities and different levels of contaminants.
  • the machine used in the last stage of sorting has the task of separating the contaminant (rejects) from the usable fiber material.
  • the separation process must be carried out in such a way that on the one hand the fiber loss is as small as possible, but on the other hand the highest possible efficiency of the removal of impurities is achieved.
  • the last sorting level determines the efficiency of the entire sorting.
  • Known power stage sorters are e.g. Vibration sorter. These machines require relatively large screen areas and high material dilutions for the necessary screen perforations in order to achieve a reasonably satisfactory sorting effect. The sieves are very susceptible to clogging.
  • the invention has for its object to provide a sorting device according to the preamble of the main claim, which makes it easy to adapt to different production quantities and different levels of impurities even with the finest screen perforations, and which keeps the fiber losses during continuous operation of the device small.
  • the result is a simple construction with good variation possibilities, for example also by adjusting the aperture.
  • the sorting apparatus consists of two structurally and functionally connected sorting units 40 and 50.
  • the first sorting unit 40 has a cylindrical sieve 8, which encloses an annular sieve space 1, which is formed between the sieve 8 and a drum-like rotor part 5, which is the first sorting unit 40 assigned.
  • the inlet 19 for the suspension is located at the end of the first sorting unit 40 facing away from the second sorting unit 50, and an outlet from the accepting material space 2 surrounding the sieve 8 is designated by 18.
  • the rotor has sorting elements 16 in the form of wings or foils, which produce a good sorting effect. The rotor is driven via shaft 27 and is not shown here.
  • the second sorting unit 50 consisting of the outer accept material space 4, the inner, annular sieve space 3 or 3 ⁇ , the cylindrical sieve 9 and the rotor part 6 with the sorting elements 17, are shown here, however, simply as radial ribs.
  • the screen space is depressurized here and is freely connected to the atmosphere via its end 3 ⁇ via outlet 31.
  • a screen 11 is interposed between the screen spaces 1 and 3, which leaves a gap 12 on the rotor and thus influences the flow between the two screen spaces in terms of flow. This also maintains the excess pressure in relation to the surrounding atmosphere in the screen space 1.
  • the accepting material space 2 surrounding the sieve space 1 or sieve 8 is sealed off from the atmosphere by an outlet valve 30 on the outlet connection 18 and is thus kept under excess pressure.
  • the excess pressure is preferably between 0.4 and 1.6 bar.
  • the sorting apparatus could also be arranged with a vertical rotor axis.
  • annular disk 7 which acts as a diaphragm, is also provided in the second sieve chamber 3. It leads to a certain congestion in the first part of the sieve chamber 3, so that the rejects only gradually pass into the downstream part of the sieve chamber 3.
  • the dilution water supplied ensures that as many fibers as possible are still washed out and recovered.
  • the diaphragm 11 is accommodated in a diaphragm housing 13 and can also be designed as an adjustable iris diaphragm. This makes it possible to adapt the flow conditions when passing from the first sieve chamber 1 to the second sieve chamber 3, even during operation. This is of particular importance when very different types of substance, e.g. different types of waste paper can be used.
  • a retaining ring 34 on the end of the sieve space 3 ⁇ adjacent to the reject material discharge 31 prevents the suspension from passing through this sieve space too quickly. This leaves enough time for the suspension located here, which is heavily contaminated with impurities, to be dewatered, so that the rejects with a high consistency of e.g. 15, 20 or more% can come out of the rejects outlet 31.
  • the first zone A relates to a pure sorting part with the rotor 5 or 5 ⁇ (the same or similar parts are identified in the current figures with the same reference numerals, but with dashes), followed by a washing zone B, 1 corresponds to the screen space 3, which is separated by damming rings 7 and 7 ⁇ from a third zone C, which acts as a drainage zone.
  • the inner diameter d 1 of the diaphragm 11 is 8 or 8 ⁇ and 9 or 9 ⁇ the same diameter in relation to the diameter of the sieves provided _ d 1 / D is 0.3 to 0.7.
  • the inner diameter of the retaining rings 7 and 7 ⁇ and 34 d2 and d3 to the sieve diameter are d2 / D equal to d3 / D equal to 0.4 to 0.8.
  • the angle of inclination y of the retaining rings 7, 7 ⁇ and 34 against the rotor axis is at least 75 °, preferably between 80 and 83 °.
  • the speed of the rotor blades or elements radially outside is between 10 and 25 m / s.
  • the sorting apparatus is to be used for the final stage sorting (so-called reject sorting) and therefore requires relatively fine sieve openings.
  • hole diameters of sieve 8 or 8 ⁇ between 0.8 and 2.6 mm would be possible, for relatively very fine sorting tasks, perforations in the form of slots between 0.15 and 0.8 mm would be possible.
  • the slot widths for the screen basket 9 or 9 ⁇ of the second screen area would be between 0.15 and 0.5 mm.
  • hole diameter or the choice of holes or slots naturally depends on the waste paper to be sorted, its degree of soiling and the type of soiling. It can be said that the hole widths for relatively fine sorting tasks in the form of round holes can have diameters between 0.6 and 1.4 mm.
  • the pressure build-up in the first sorting part 40, 40 ⁇ enables high throughput due to the orifice and the pressure build-up enables the use of sieves with the finest perforations, as stated in the text.
  • the dilution water can preferably be added by means of lines 26 connected obliquely, for example in the tangential direction, to the strainer basket 9 or 9 'in the region of the washing zone B. Additional measures can be taken here to prevent the dilution water from escaping from the screen area there too quickly.
  • This can e.g. an unperforated area 25 of the strainer basket 9 or 9 ⁇ serving as a locking plate (see FIG. 2). This is also shown in cross section B-B of FIG. 2.
  • the rotor elements which are used to circulate the suspension in the screen space 1 or 1 ⁇ of the first sorting unit 40 or 40onia, can be hydrofoils 16, but also projections 23 with a sharp edge at the front in the direction of rotation with a radial abutting surface, as in FIGS 3 shown. In this case, these rotor elements are continuous strips which extend over the length of the rotor part. However, they can also be divided several times and then be distributed approximately evenly over the outer surface of the rotor drum as shorter elements.
  • this washing zone B which is formed by the first zone of the second sorting unit 50 ⁇ adjacent to the screen space of the first sorting unit 40 ⁇ , one outside of the screen 9 ⁇ on all sides delimited acceptable substance space 14 ⁇ create, as shown in Fig. 3A. It is formed by a circumferential, cylindrical sheet 41 and two ring walls 44 and 45 on each end face. A line 42 leads out of this accepted substance space, the cross section of which can be controlled by the valve 43. This makes it possible in a special way that the washing water also fulfills its function and thus separates as many fibers as possible from the soiling, which are then sorted out by the sieve 9 ⁇ .
  • hydrofoils ie rotor blades provided with an airfoil profile
  • the rotor elements 28 are fastened to the helical surfaces provided on both front ends of the rotor part 5 ⁇ , which are formed by feed screws 36 of a single design.
  • the first rotor part 5 ′′′ carries rotor blades in the form of inclined ribs. Due to the inclined position, the suspension is also transported faster from one axial end to the other of the rotor 5 ′′′.
  • the rotor parts 5 ⁇ and 5 ′′′ of Figures 4 and 5 have as the base body open support drums which are held on one end face by means of support flanges 38 on the rotor shaft 27 ⁇ . These support flanges have holes 39 through which the introduced suspension initially flows in the axial direction near the rotor shaft through the rotor drum to the other axial end of the rotor drum, where it then reverses and arrives at the sorting elements 28 and 24, respectively, through the sieve 8 ⁇ to be sorted. There at the screw conveyors 36 are set up so that they support the flow of the suspension towards the sorting elements 24 and 28, depending on the direction of rotation. In this way, recirculation of the suspension occurs.
  • the recirculation of the impurities retained on the sieve results in a concentrated detection of the specifically light impurities and impurities in the center of the rotor drum 5 ⁇ and a lower long fiber concentration in the overflow portion, ie more long fibers are sorted out through the sieve 8 zunot and fed to the accepted substance. This facilitates both the subsequent washing and dewatering process and, of course, the fiber loss is also reduced.
  • rotor elements in the form of simple ribs or plates are preferably used, in FIGS. 1 to 5 with 15 and 17 respectively. Their radial dimension is between 25% and 45% of the respective inner diameter of the sieve in question.
  • these plates 22 are arranged somewhat obliquely to the generatrix of the outer surface of this rotor part. They are distributed approximately in a helical pattern over the outer surface.
  • Fig. 8 it is shown that the second screen basket 9 ⁇ of the second sorting unit 50 ⁇ can be tapered to the outlet end in the overflow 31.
  • the taper is approximately between 3 and 6 °, as shown.
  • the incline could of course be much stronger.
  • the radially outer edge of the sorting wing 17 ⁇ adapts to this conical sieve shape. This could improve the dewatering of debris (rejects).
  • the screen basket 9 ′′′ of the second sorting unit 50 ′′′ is cylindrical, but a central central axis is inclined obliquely upwards towards the rotor central axis towards the overflow end 31.
  • this inclination could also be chosen to be between 3 and 6 °.
  • the radially outer edge of the rotor blades 17 ′′′ must adapt to this inclination according to FIG. 8.
  • the variant according to FIG. 10 has an annular sieve space 305 in the first part, which is formed between a rotationally symmetrical sieve basket 308 and a drum-like rotor part 300, which carries the sorting elements 16.
  • the diameter of the first sieve 308 is significantly larger than that of the second sieve 311, the difference is therefore more than 20%, preferably more than 50%.
  • Suspensions with a relatively low dirt content, but for high throughputs, can be used here.
  • the suspension is fed in via line 74, while the cleaned fiber suspension is withdrawn from the accepting material chamber 304 via line 75.
  • Dilution water in the second sieve chamber 312 can also be fed in via the line 66 and perforations in the upper, drum-shaped rotor part, and also through the hollow part of the shaft 318 in the transition region between the first and second sieve chambers.
  • a baffle plate 324 is also attached to the rotor shaft 318.
  • the removal of the cleaned fiber suspension behind the second sieve 311 takes place through line 78.
  • the rejects are out occurs the second sieve space 312 on the drum part of the rotor, a plurality of ejection vanes 61 are provided with preferably radial extension in order to better convey the rejects into the discharge channel 60.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Centrifugal Separators (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Removal Of Specific Substances (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Filtration Of Liquid (AREA)
EP88100660A 1987-02-07 1988-01-19 Spuckstoffsortierer Expired - Lifetime EP0278260B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88100660T ATE61429T1 (de) 1987-02-07 1988-01-19 Spuckstoffsortierer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873703831 DE3703831A1 (de) 1987-02-07 1987-02-07 Spuckstoffsortierer
DE3703831 1987-02-07

Publications (3)

Publication Number Publication Date
EP0278260A2 EP0278260A2 (de) 1988-08-17
EP0278260A3 EP0278260A3 (en) 1989-02-15
EP0278260B1 true EP0278260B1 (de) 1991-03-06

Family

ID=6320510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100660A Expired - Lifetime EP0278260B1 (de) 1987-02-07 1988-01-19 Spuckstoffsortierer

Country Status (9)

Country Link
US (1) US4911828A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0278260B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS63288290A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
KR (1) KR960004539B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE61429T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR8800535A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1330207C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE3703831A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES2021399B3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE464640B (sv) * 1988-06-16 1991-05-27 Kamyr Ab Apparat foer silning av en suspension av en fiberhaltig cellulosamassa
FI80735B (fi) * 1988-08-04 1990-03-30 Tampella Oy Ab Foerfarande och anordning foer sortering och behandling av massa.
SE464473B (sv) * 1988-11-17 1991-04-29 Sunds Defibrator Ind Ab Silanordning
US5172813A (en) * 1989-05-17 1992-12-22 A. Ahlstrom Corporation Method and an apparatus for treating fiber suspension
SE465038B (sv) * 1989-11-22 1991-07-15 Kamyr Ab Apparat foer avskiljning av partiklar ur en massastroem och fraktionering av denna
US5119953A (en) * 1990-04-02 1992-06-09 Celleco Hedemora Ab Pulp suspension screening and fractionation apparatus
EP0529548B1 (en) * 1991-08-30 1996-07-17 Aikawa Iron Works Co., Ltd. Screen apparatus for paper making
US5433849A (en) * 1993-09-15 1995-07-18 Lyco Manufacturing, Inc. Double drum waste water screen
US6155427A (en) * 1996-11-14 2000-12-05 Thermo Black Clawson Inc. Zoned pressure screen
GB2319196B (en) * 1996-11-14 1998-11-04 Black Clawson Co Zoned pressure screen
SE509289C2 (sv) 1997-04-14 1999-01-11 Sunds Defibrator Ind Ab Silanordning med rejektförstrypning
SE9901148L (sv) 1999-03-29 2000-06-12 Valmet Fibertech Ab Silanordning med ett roterbart och ett stationärt silorgan
SE514071C2 (sv) 1999-04-08 2000-12-18 Valmet Fibertech Ab Silanordning med axiellt förskjutbar spaltring
AT408771B (de) * 2000-02-03 2002-03-25 Andritz Ag Maschf Sortierer zur reinigung einer faserstoffsuspension
KR100485929B1 (ko) * 2002-11-14 2005-04-29 한국염색기술연구소 회전 스크린 및 싸이크론 세정탑을 이용한 분진 및 악취제거장치
IN2015DN01884A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 2012-08-13 2015-08-07 Lee Tech Llc
US11103811B2 (en) 2016-11-04 2021-08-31 Icm, Inc. Mechanical separation devices
FI20175776A1 (fi) 2017-08-31 2019-03-01 Andritz Oy Erotuslaite
US12134049B2 (en) 2018-06-10 2024-11-05 Icm, Inc. Mechanical separation device

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US1209264A (en) * 1915-11-24 1916-12-19 Philip J Clune Sanitary protector.
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GB372760A (en) * 1930-12-11 1932-05-11 Horace Waring Improvements in or relating to the drying and/or filtration of mixtures of liquids and solids
GB399300A (en) * 1932-08-05 1933-10-05 Frank Pascall Improvements in sifting or bolting machines for flour and other granular or pulverulent material
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DE2712749A1 (de) * 1977-03-23 1979-02-08 Finckh Maschf Sortierer zum sichten von fasersuspensionen
DE2850385C2 (de) * 1978-11-21 1981-02-05 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum Ausscheiden von Verunreinigungen aus Faserstoffsuspensionen
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Also Published As

Publication number Publication date
EP0278260A2 (de) 1988-08-17
DE3861867D1 (de) 1991-04-11
DE3703831A1 (de) 1988-09-08
KR960004539B1 (ko) 1996-04-06
DE3703831C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1988-12-08
ATE61429T1 (de) 1991-03-15
US4911828A (en) 1990-03-27
EP0278260A3 (en) 1989-02-15
ES2021399B3 (es) 1991-11-01
BR8800535A (pt) 1988-09-27
CA1330207C (en) 1994-06-14
KR880010188A (ko) 1988-10-07
JPS63288290A (ja) 1988-11-25

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