SE463425B - dewatering - Google Patents

dewatering

Info

Publication number
SE463425B
SE463425B SE8901373A SE8901373A SE463425B SE 463425 B SE463425 B SE 463425B SE 8901373 A SE8901373 A SE 8901373A SE 8901373 A SE8901373 A SE 8901373A SE 463425 B SE463425 B SE 463425B
Authority
SE
Sweden
Prior art keywords
screen drum
pulp
screw thread
drum
dewatering
Prior art date
Application number
SE8901373A
Other languages
Swedish (sv)
Other versions
SE8901373D0 (en
SE8901373L (en
Inventor
E Hoden
Original Assignee
Sunds Defibrator Ind Ab
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 Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Priority to SE8901373A priority Critical patent/SE463425B/en
Publication of SE8901373D0 publication Critical patent/SE8901373D0/en
Priority to PCT/SE1990/000168 priority patent/WO1990012919A1/en
Priority to AU55417/90A priority patent/AU5541790A/en
Publication of SE8901373L publication Critical patent/SE8901373L/en
Publication of SE463425B publication Critical patent/SE463425B/en

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/28—Position of the filtering element
    • B01D2201/287—Filtering elements with a vertical or inclined rotation or symmetry axis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Centrifugal Separators (AREA)
  • Paper (AREA)

Description

.äs Cu \ CN -Dh NJ 01 suspensionen i sin övre ände samt tillförselöppningar 6 vid'nedre delen av siltrumman 1. Vidare är axeln 3 försedd med en skruvgânga 7 för transport av massan uppåt genom sil- trumman 1 under samtidig avvattning. Avvattningen erhålles till följd av centrifugalkraftens inverkan. Genom att både siltrumman 1 och axeln 3 med skrzfgängan 7 roteras åt samma håll men med något olika hastighet kan den önskade transporten uppåt erhållas. Genom att reglera denna varv- talsskillnad kan massatransporten styras. The suspension at its upper end and supply openings 6 at the lower part of the screen drum 1. Furthermore, the shaft 3 is provided with a screw thread 7 for transporting the mass upwards through the screen drum 1 during simultaneous dewatering. The dewatering is obtained due to the action of the centrifugal force. By rotating both the screen drum 1 and the shaft 3 with the screw thread 7 in the same direction but at a slightly different speed, the desired transport upwards can be obtained. By regulating this speed difference, mass transport can be controlled.

Anordningens rotationsaxel är vertikal eller närmast vertikal. Beträffande inloppet 5 för massasuspensionen är det givetvis möjligt att i stället anordna detta i axelns 3 andra ända. Alternativt kan inloppet anordnas direkt i botten av utrymmet innanför siltrumman 1. Väsentligt är att tillförseln av massasuspensionen sker vid nedre delen av siltrumman 1.The axis of rotation of the device is vertical or almost vertical. With regard to the inlet 5 for the pulp suspension, it is of course possible to arrange this at the other end of the shaft 3 instead. Alternatively, the inlet can be arranged directly at the bottom of the space inside the screen drum 1. It is essential that the supply of the pulp suspension takes place at the lower part of the screen drum 1.

Skruvgângan 7 sträcker sig inte ända ut mot siltrum- man 1 varigenom en spalt 8 bildas mellan dessa. Storleken på denna spalt bör vara 1-20 mm, lämpligen 3-10 mm. I den övre delen av siltrumman 1 är utlopp 9 för den avvattnade massan placerade. Utanför dessa utloppsöppningar 9 är en uppsamlingsanordning 10 placerad för att ta emot den av- vattnade massan som matas ut genom utloppen 9. Den genom siltrumman 1 avskilda vätskan uppsamlas i en yttre kammare 11 som omger siltrumman 1. Vätskan avleds därifrån genom ett utlopp 12. På utsidan av siltrumman 1 och koncentriskt med denna är ett rensorgan 13 anordnat. Detta organ 13 är axiellt förskjutbart längs siltrumman 1 och utformat med munstycken för sprutning av vätska eller luft in mot ' siltrumman 1.The screw thread 7 does not extend all the way out towards the screen drum 1, whereby a gap 8 is formed between them. The size of this gap should be 1-20 mm, preferably 3-10 mm. In the upper part of the screen drum 1, outlet 9 for the dewatered mass is located. Outside these outlet openings 9, a collecting device 10 is placed to receive the dewatered mass which is discharged through the outlets 9. The liquid separated by the screen drum 1 is collected in an outer chamber 11 surrounding the screen drum 1. The liquid is diverted therefrom through an outlet 12. On the outside of the screen drum 1 and concentrically therewith a cleaning means 13 is arranged. This member 13 is axially displaceable along the screen drum 1 and formed with nozzles for spraying liquid or air towards the screen drum 1.

Massasuspensionen som införes genom axeln 3 har lämp- ligen en koncentration av 1-4%. När massan strömmar ut genom tillförselöppningarna 6 försätts den i rotation av skruvgängan 7 och siltrumman 1 så att avvattningen sker genom centrifugalkraftens inverkan. I spalten 8 mellan skruvgângan och siltrumman kommer ett skikt av massa att avsättas. Detta massaskikt kommer då att tjänstgöra som ett'fi1termedium genom vilket avvattningen sker. Massa- skiktet gör att avskiljningen av fibermaterial blir mycket effektiv. Skikttjockleken bestäms av skruvgängan. Even- tuellt kan det avsatta skiktet temporärt avlägsnas på lämpligt sätt, exvis genom ett arrangemang för renspolning såsom visas i figuren. Från det ringformiga rensorganet 13 sprutas vätska mot siltrumman 1 så att det avsatta skiktet upplöses. Genom att förflytta rensorganet 13 uppåt utefter siltrumman 1 avlägsnas hela skiktet samtidigt som ett nytt skikt avsätts. Detta kan vara aktuellt om massaskiktet blir alltför igensatt av finmaterial så att kapaciteten sänks.The pulp suspension introduced through the shaft 3 suitably has a concentration of 1-4%. When the mass flows out through the supply openings 6, it is set in rotation by the screw thread 7 and the screen drum 1 so that the dewatering takes place by the action of the centrifugal force. In the gap 8 between the screw thread and the screen drum, a layer of pulp will be deposited. This pulp layer will then serve as a filter medium through which the dewatering takes place. The pulp layer makes the separation of fibrous material very efficient. The layer thickness is determined by the screw thread. Optionally, the deposited layer can be temporarily removed in a suitable manner, for example by an arrangement for rinsing as shown in the figure. From the annular cleaning means 13, liquid is sprayed against the sieve drum 1 so that the deposited layer dissolves. By moving the cleaning member 13 upwards along the sieve drum 1, the entire layer is removed at the same time as a new layer is deposited. This may be the case if the pulp layer becomes too clogged with fine material so that the capacity is reduced.

Koncentrationen hos massan efter avvattningen kan uppgå till 30% eller högre samtidigt som fiberhalten i vätskan blir försumbar.The concentration of the pulp after dewatering can amount to 30% or higher at the same time as the fiber content in the liquid becomes negligible.

Uppfinningen är givetvis inte begränsad till den visade utföringsformen utan kan varieras inom ramen för uppfinnings- tanken.The invention is of course not limited to the embodiment shown but can be varied within the scope of the inventive idea.

Claims (4)

1/ 1 f' 'i f *f O 3 År 2 5 PAfrENTmAv ..1/1 f '' i f * f O 3 Years 2 5 PAfrENTmAv .. 1. Anordning för avvattning av massasuspensioner, vilken anordning innefattar ett inlopp (5) för massan till insidan av en med silöppningar försedd roterbar siltrumma (1), en i siltrumman anordnad roterbar axel (3) med en skruvgänga (7) avsedd att transportera massasuspensionen utefter siltrumman (1) under avvattning till följd av centrifugalkraftens inverkan samt utlopp (12 resp 9) för vätska resp avvattnad massa, k ä n n e t e c k n a d a v att siltrumman (1) har vertikal rotationsaxel, att skruv- gängan (7) och siltrumman (1) mellan sig bildar en spalt (8) i vilken ett skikt av massa kan avsättas på insidan av siltrumman (1) för att därigenom tjänstgöra som filter- medium genom vilket avvattningen sker samt ett arrangemang för att vid behov temporärt avlägsna det i spalten (8) avsatta massaskiktet.Device for dewatering pulp suspensions, which device comprises an inlet (5) for the pulp to the inside of a rotatable screen drum (1) provided with screen openings, a rotatable shaft (3) arranged in the screen drum with a screw thread (7) intended to transport the pulp suspension along the screen drum (1) during dewatering due to the action of the centrifugal force and outlets (12 and 9, respectively) for liquid and dewatered mass, characterized in that the screen drum (1) has a vertical axis of rotation, that the screw thread (7) and the screen drum (1) between forms a gap (8) in which a layer of mass can be deposited on the inside of the sieve drum (1) to thereby serve as a filter medium through which the dewatering takes place and an arrangement for temporarily removing what is deposited in the gap (8) the pulp layer. 2. Anordning enligt kravet 1, k ä n n e t e c k n a d a v att spalten (8) mellan skruvgängan (7) och siltrumman uppgår till 1-26 mm, företrädesvis 3-10 mm.Device according to claim 1, characterized in that the gap (8) between the screw thread (7) and the screen drum amounts to 1-26 mm, preferably 3-10 mm. 3. Anordning enligt kravet 1 eller Ä, k ä n n e t e c k n a d a v att massainloppet (5) är anordnat genom axeln (3) som år försedd med tillförsel- öppningar (6) vid nedre delen av siltrumman (1) varvid skruvgängan (7) är anordnad att transportera massan uppåt genom siltrumman (1).Device according to claim 1 or Ä, characterized in that the pulp inlet (5) is arranged through the shaft (3) which is provided with supply openings (6) at the lower part of the screen drum (1), the screw thread (7) being arranged to transport the mass upwards through the sieve drum (1). 4. Anordning enligt något av föregående krav, k ä n n e t e c k n a d a v att organet (13) för avlägs- nande av massaskiktet utgöres av ett axiellt förskjutbart rensorgan (13) anordnat runt utsidan av siltrumman (1) för sprutning av vätska eller luft in mot siltrumman för att därigenom avlägsna det avsatta massaskiktet.Device according to one of the preceding claims, characterized in that the means (13) for removing the pulp layer consists of an axially displaceable cleaning means (13) arranged around the outside of the screen drum (1) for spraying liquid or air towards the screen drum for thereby removing the deposited pulp layer.
SE8901373A 1989-04-17 1989-04-17 dewatering SE463425B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE8901373A SE463425B (en) 1989-04-17 1989-04-17 dewatering
PCT/SE1990/000168 WO1990012919A1 (en) 1989-04-17 1990-03-15 Dewatering device
AU55417/90A AU5541790A (en) 1989-04-17 1990-03-15 Dewatering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8901373A SE463425B (en) 1989-04-17 1989-04-17 dewatering

Publications (3)

Publication Number Publication Date
SE8901373D0 SE8901373D0 (en) 1989-04-17
SE8901373L SE8901373L (en) 1990-10-18
SE463425B true SE463425B (en) 1990-11-19

Family

ID=20375690

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8901373A SE463425B (en) 1989-04-17 1989-04-17 dewatering

Country Status (3)

Country Link
AU (1) AU5541790A (en)
SE (1) SE463425B (en)
WO (1) WO1990012919A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997004165A1 (en) * 1995-07-17 1997-02-06 Kvaerner Pulping Aktiebolag Method and device for treating a pulp suspension
US6139685A (en) * 1998-01-16 2000-10-31 Kvaerner Pulping Ab Method and device for treating a pulp suspension

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397049B (en) * 1991-12-05 1994-01-25 Maximilian Kriegl DEVICE FOR SEPARATING PARTICULAR MATERIAL
JPH0763873B2 (en) * 1991-12-20 1995-07-12 富国工業株式会社 Rotary sieve
GB9321705D0 (en) * 1993-10-21 1993-12-15 Gardner Joseph Slurry separator
GB2297281B (en) * 1993-10-21 1998-04-01 Joseph Gardner Slurry separator
JPH11216313A (en) 1998-02-03 1999-08-10 Ishikawajima Harima Heavy Ind Co Ltd Dewatering and concentrating apparatus
AT507837B1 (en) * 2008-12-29 2010-10-15 Andritz Ag Maschf METHOD AND DEVICE FOR DRAINING AND DISPERSING A FIBROUS MATERIAL
SE536163C2 (en) * 2011-10-03 2013-06-04 Metso Paper Sweden Ab Mass distribution unit, as well as apparatus for washing and / or dewatering cellulose pulp
GB2505670A (en) * 2012-09-06 2014-03-12 Siemens Vai Metals Tech Gmbh Dewatering slurry
CN107640881A (en) * 2017-11-03 2018-01-30 张佩春 A kind of sewage pre-dehydration device of band recoil cleaning

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911899A1 (en) * 1978-03-29 1979-10-04 Uop Inc METHOD FOR DEWATERING OF FIBER-SHAPED ORGANIC WASTE MATERIALS
SE421434B (en) * 1978-06-14 1981-12-21 Berggren Torsten L SCREW PRESS

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997004165A1 (en) * 1995-07-17 1997-02-06 Kvaerner Pulping Aktiebolag Method and device for treating a pulp suspension
US6071378A (en) * 1995-07-17 2000-06-06 Kvaerner Pulping Ab Method and device for treating a pulp suspension
US6139685A (en) * 1998-01-16 2000-10-31 Kvaerner Pulping Ab Method and device for treating a pulp suspension

Also Published As

Publication number Publication date
SE8901373D0 (en) 1989-04-17
WO1990012919A1 (en) 1990-11-01
AU5541790A (en) 1990-11-16
SE8901373L (en) 1990-10-18

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