SE468899B - DEVICE FOR DEATH OF A FIBER SUSPENSION - Google Patents
DEVICE FOR DEATH OF A FIBER SUSPENSIONInfo
- Publication number
- SE468899B SE468899B SE9102370A SE9102370A SE468899B SE 468899 B SE468899 B SE 468899B SE 9102370 A SE9102370 A SE 9102370A SE 9102370 A SE9102370 A SE 9102370A SE 468899 B SE468899 B SE 468899B
- Authority
- SE
- Sweden
- Prior art keywords
- rotor
- channels
- inlet
- pulp
- chamber
- Prior art date
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
- D21F1/74—Pulp catching, de-watering, or recovering; Re-use of pulp-water using cylinders
- D21F1/76—Pulp catching, de-watering, or recovering; Re-use of pulp-water using cylinders with suction
-
- 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
- D21F1/02—Head boxes of Fourdrinier machines
Description
CJ \ oo CO ' f) »o Uppfinningens kännetecken framgår av patentkraven. The features of the invention appear from the claims.
I det följande skall uppfinningen beskrivas närmare under hänvisning till figurerna där Fig 1 visar ett massainlopp till en avvattningsan- ordning enligt uppfinningen; Fig 2 visar ytan på en i massainloppet anordnad rotor; Fig 3 visar en detalj av ytan på rotorn enligt ett snitt III-III i fig 2; Fig 4 visar en alternativ utformning av massainlopppet.In the following, the invention will be described in more detail with reference to the figures, where Fig. 1 shows a mass inlet to a dewatering device according to the invention; Fig. 2 shows the surface of a rotor arranged in the pulp inlet; Fig. 3 shows a detail of the surface of the rotor according to a section III-III in Fig. 2; Fig. 4 shows an alternative design of the pulp inlet.
Anordningen innefattar en genombruten rörlig yta 1 på vilken massasuspensionen är avsedd att formeras. Den rörliga ytan kan utgöras av en perforerad vals, vira eller dylikt. Ett massainlopp 2 är anordnat för tillförsel av suspensionen. Massainloppet 2 är utformat med en cylindrisk kammare 3 som omsluter en cylindrisk rotor 4 som är vridbar runt sin axel. Kammaren 3 och rotorn 4 är anordnade tvärs massans strömningsriktning och har en längd som i huvudsak motsvarar den rörliga ytans 1 bredd. Kammaren 3 är försedd med ett inlopp 5 och ett utlopp 6 placerade i huvudsak mitt emot varandra.The device comprises an openwork movable surface 1 on which the pulp suspension is intended to be formed. The moving surface may be a perforated roller, wire or the like. A pulp inlet 2 is provided for supplying the suspension. The pulp inlet 2 is formed with a cylindrical chamber 3 which encloses a cylindrical rotor 4 which is rotatable about its axis. The chamber 3 and the rotor 4 are arranged across the flow direction of the mass and have a length which substantially corresponds to the width of the movable surface 1. The chamber 3 is provided with an inlet 5 and an outlet 6 located substantially opposite each other.
Den cylindriska rotorn 4 är på ytan försedd med ett flertal korsvis anordnade kanaler 7. Dessa kanaler är lämpligen skruvformigt anordnade med motsatta stigningsvinklar. Kanalerna kan anordnas så att korsningarna bildar rät vinkel eller i närheten därav. Genom att rotorn 4 omsluts av kammaren 3 med ett litet spel så tvingas massasuspensionen strömma genom kanalerna 7.The cylindrical rotor 4 is provided on the surface with a plurality of cross-arranged channels 7. These channels are suitably helically arranged with opposite pitch angles. The channels can be arranged so that the intersections form a right angle or in the vicinity thereof. Because the rotor 4 is enclosed by the chamber 3 with a small clearance, the pulp suspension is forced to flow through the channels 7.
Den vridbara rotorn 4 är lämpligen roterbar med låg rotationshastighet, exempelvis 1-20 rpm. Drivningen av rotorn bör vara reverserbar. Rotorns 4 diameter kan vara 50-100 mm.The rotatable rotor 4 is suitably rotatable at a low rotational speed, for example 1-20 rpm. The drive of the rotor should be reversible. The diameter of the rotor 4 can be 50-100 mm.
Kanalerna skall dimensioneras så att massasuspensionens strömningshastighet blir tillräcklig. Lämplig storlek på av 468 899 3 kanalerna kan vara bredd 2~10 mm, företrädesvis 3-7 mm, och djup 2-8 mm, lämpligen 3-6 mm.The ducts must be dimensioned so that the flow rate of the pulp suspension is sufficient. Suitable size of of the channels may be 2 ~ 10 mm wide, preferably 3-7 mm, and 2-8 mm deep, preferably 3-6 mm.
Anordningens funktion är följande.The function of the device is as follows.
Massasuspensionen tillföres genom massainloppet 2 varvid massan via kammarens 3 inlopp 5 strömmar in i kanalerna 7, följer dessa samt strömmar ut genom kammarens 3 utlopp 6.The pulp suspension is supplied through the pulp inlet 2, the pulp via the inlet 5 of the chamber 3 flowing into the channels 7, following these and flowing out through the outlet 6 of the chamber 3.
Detta utlopp 6 kommunicerar direkt med den rörliga ytan 1.This outlet 6 communicates directly with the moving surface 1.
Massaströmmen genom kanalerna 7 sker med hög hastighet och i varje korsning mellan två kanaler 7 uppstår momentant en hastighetsökning som förorsakar en intensiv turbulens. Därigenom förhindras flockbildning i massan och redan bildade flockar bryts sönder. Genom att rotorn 4 vrids runt sin axel med långsam rotation, kontinuerlig eller reverserad, kommer strömningsriktningen genom varje kanal 7 att växla periodvis. Därmed undviks igensâttning av kanalerna. Rotorns hastighet skall vara så låg i förhållande till massans strömningshastighet genom kanalerna 7 att flödet i ena och andra riktningen runt rotorn 4 i huvudsak blir lika stort. Därigenom undviks snedbelastning av rotorn samtidigt som uppkomsten av fiberflockar förhindras på bästa sätt.The mass flow through the channels 7 takes place at a high speed and in each intersection between two channels 7 an instantaneous increase in speed occurs which causes an intense turbulence. This prevents flocculation in the mass and already formed flocks are broken. By rotating the rotor 4 around its axis with slow rotation, continuous or reversed, the direction of flow through each channel 7 will change periodically. This avoids clogging of the ducts. The speed of the rotor should be so low in relation to the flow speed of the mass through the channels 7 that the flow in one and the other direction around the rotor 4 becomes substantially equal. This avoids skewed loading of the rotor while preventing the formation of fiber flocks in the best way.
Enligt den i fig 4 visade utföringsformen är en yttre returledning 8, 9 kopplad mellan kammarens 3 utlopp 6 och inlopp 5. I denna ledning 8, 9 är en pump 10 placerad.According to the embodiment shown in Fig. 4, an outer return line 8, 9 is connected between the outlet 6 and the inlet 5 of the chamber 3. In this line 8, 9 a pump 10 is placed.
Avsikten med detta arrangemang är att en högre strömningshastighet skall kunna upprätthàllas i kanalerna 7 än vad som motsvarar kapaciteten hos avvattningsanordningen.The purpose of this arrangement is that a higher flow rate should be maintained in the channels 7 than what corresponds to the capacity of the dewatering device.
En del av massaflödet cirkuleras då genom ledningen 8, 9 från utloppet 6 till inloppet 5. På detta sätt kan en homogen ström av massa fri från fiberflockar säkerställas till formeringszonen på den rörliga ytan 1 oberoende av kapaciteten hos avvattningsanordningen.A part of the pulp flow is then circulated through the line 8, 9 from the outlet 6 to the inlet 5. In this way a homogeneous flow of pulp free from fiber flocks can be ensured to the formation zone on the movable surface 1 regardless of the capacity of the dewatering device.
Uppfinningen är givetvis inte begränsad till de redovisade utföringsformerna utan kan varieras inom ramen för uppfinningstanken.The invention is of course not limited to the described embodiments but can be varied within the scope of the inventive idea.
Claims (8)
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9102370A SE468899B (en) | 1991-08-16 | 1991-08-16 | DEVICE FOR DEATH OF A FIBER SUSPENSION |
| JP5504251A JPH06509847A (en) | 1991-08-16 | 1992-06-25 | Pulp suspension dewatering equipment |
| PCT/SE1992/000469 WO1993004234A1 (en) | 1991-08-16 | 1992-06-25 | Device for dewatering a pulp suspension |
| EP92917661A EP0598807A1 (en) | 1991-08-16 | 1992-06-25 | Device for dewatering a pulp suspension |
| BR9206354A BR9206354A (en) | 1991-08-16 | 1992-06-25 | Device for dehydrating a slurry of pulp |
| CA 2114130 CA2114130A1 (en) | 1991-08-16 | 1992-06-25 | Device for dewatering a pulp suspension |
| AU24079/92A AU2407992A (en) | 1991-08-16 | 1992-06-25 | Device for dewatering a pulp suspension |
| FI940708A FI940708A0 (en) | 1991-08-16 | 1994-02-15 | Device for dewatering a pulp suspension |
| NO940522A NO940522L (en) | 1991-08-16 | 1994-02-15 | Device for dewatering a pulp suspension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9102370A SE468899B (en) | 1991-08-16 | 1991-08-16 | DEVICE FOR DEATH OF A FIBER SUSPENSION |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE9102370D0 SE9102370D0 (en) | 1991-08-16 |
| SE9102370L SE9102370L (en) | 1993-02-17 |
| SE468899B true SE468899B (en) | 1993-04-05 |
Family
ID=20383479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE9102370A SE468899B (en) | 1991-08-16 | 1991-08-16 | DEVICE FOR DEATH OF A FIBER SUSPENSION |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0598807A1 (en) |
| JP (1) | JPH06509847A (en) |
| AU (1) | AU2407992A (en) |
| BR (1) | BR9206354A (en) |
| CA (1) | CA2114130A1 (en) |
| FI (1) | FI940708A0 (en) |
| SE (1) | SE468899B (en) |
| WO (1) | WO1993004234A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE532366C2 (en) * | 2008-04-23 | 2009-12-22 | Metso Paper Inc | Distribution device for dispensing cellulose pulp |
| EP2907916A1 (en) * | 2014-02-12 | 2015-08-19 | Mayr-Melnhof Karton AG | Method and apparatus for producing a multilayer fibrous web with one or more layers, and multilayer fibrous web with one or more layers produced according to the method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3869769D1 (en) * | 1987-01-30 | 1992-05-07 | Ahlstroem Oy | DEVICE AND METHOD FOR SPREADING PULP ONTO A TAPE. |
-
1991
- 1991-08-16 SE SE9102370A patent/SE468899B/en not_active IP Right Cessation
-
1992
- 1992-06-25 WO PCT/SE1992/000469 patent/WO1993004234A1/en not_active Application Discontinuation
- 1992-06-25 EP EP92917661A patent/EP0598807A1/en not_active Ceased
- 1992-06-25 CA CA 2114130 patent/CA2114130A1/en not_active Abandoned
- 1992-06-25 AU AU24079/92A patent/AU2407992A/en not_active Abandoned
- 1992-06-25 JP JP5504251A patent/JPH06509847A/en active Pending
- 1992-06-25 BR BR9206354A patent/BR9206354A/en not_active Application Discontinuation
-
1994
- 1994-02-15 FI FI940708A patent/FI940708A0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI940708A (en) | 1994-02-15 |
| JPH06509847A (en) | 1994-11-02 |
| WO1993004234A1 (en) | 1993-03-04 |
| CA2114130A1 (en) | 1993-03-04 |
| BR9206354A (en) | 1995-11-07 |
| EP0598807A1 (en) | 1994-06-01 |
| FI940708A0 (en) | 1994-02-15 |
| AU2407992A (en) | 1993-03-16 |
| SE9102370L (en) | 1993-02-17 |
| SE9102370D0 (en) | 1991-08-16 |
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|---|---|---|---|
| NAL | Patent in force |
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