SE501710C2 - Pulp treatment and dewatering arrangement useful for paper mfr. - comprises press nip-forming liq.-permeable roll pair in trough with opening in base section with novel seal for simple opening and closing - Google Patents

Pulp treatment and dewatering arrangement useful for paper mfr. - comprises press nip-forming liq.-permeable roll pair in trough with opening in base section with novel seal for simple opening and closing

Info

Publication number
SE501710C2
SE501710C2 SE9302897A SE9302897A SE501710C2 SE 501710 C2 SE501710 C2 SE 501710C2 SE 9302897 A SE9302897 A SE 9302897A SE 9302897 A SE9302897 A SE 9302897A SE 501710 C2 SE501710 C2 SE 501710C2
Authority
SE
Sweden
Prior art keywords
trough
opening
base section
press nip
bottom part
Prior art date
Application number
SE9302897A
Other languages
Swedish (sv)
Other versions
SE9302897L (en
SE9302897D0 (en
Inventor
Ingemar Sundqvist
Olof Swaerdh
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 SE9302897A priority Critical patent/SE501710C2/en
Publication of SE9302897D0 publication Critical patent/SE9302897D0/en
Publication of SE9302897L publication Critical patent/SE9302897L/en
Publication of SE501710C2 publication Critical patent/SE501710C2/en

Links

Classifications

    • 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
    • B30B9/20—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 rotary pressing members, other than worms or screws, e.g. rollers, rings, discs
    • 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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • D21C9/06—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in filters ; Washing of concentrated pulp, e.g. pulp mats, on filtering surfaces
    • 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

Abstract

Arrangement for liq. treatment and dewatering of material suspensions, comprises two cylindrical, rotatable, liq.-permeable press rolls located in a trough that surrounds part of the rolls, with the rolls creating a press nip and a press nip converging region being formed between the base section of the trough and each roll. The base section of the trough can be opened and the rearrangement comprises a seal between the trough and its base section, in the form of a hollow, circumferential sealing ring connected to a pressure medium source and an opposing flat, vertical sealing surface.

Description

5Û1 710 2 fig 1 visar ett tvärsnitt genom en avvattningspress enligt uppfinningen och fig 2 visar en detalj av trågbottentätningen i större skala. Fig. 1 shows a cross section through a drainage press according to the invention and Fig. 2 shows a detail of the trough bottom seal on a larger scale.

Anordningen innefattar två cylindriska, roterbara, vätskegenomsläppliga pressvalsar 10. Valsarna 10 är delvis nedsänkta i ett tråg 11 som är utformat så att ett konver- gerande utrymme 12 bildas mellan tråget och vardera valsen.The device comprises two cylindrical, rotatable, liquid-permeable press rollers 10. The rollers 10 are partially immersed in a trough 11 which is designed so that a converging space 12 is formed between the trough and each roller.

Varje utrymme 12 är anslutet till ett inlopp 13 för material- suspensionen. Mellan valsarna 10 bildas ett pressnyp 14.Each space 12 is connected to an inlet 13 for the material suspension. A press nip 14 is formed between the rollers 10.

Varje utrymme 12 är vidare försett med inlopp 15 för behandlingsvätska där det konvergerande utrymmet 12 tillfälligt vidgas för att medge tillförsel av behandlingsvätskan.Each space 12 is further provided with inlet 15 for treatment liquid where the converging space 12 is temporarily widened to allow supply of the treatment liquid.

Trågets 11 bottendel 16 är höj- och sänkbar medelst en hydraulcylinder 17. Det stängda läget bestäms av ett meka- niskt stopp.The bottom part 16 of the trough 11 can be raised and lowered by means of a hydraulic cylinder 17. The closed position is determined by a mechanical stop.

Tätningen mellan tråget 11 och dess bottendel 16 åstadkommas av en runt bottendelen 16 anordnad ihålig tät- ningsring 18 av elastiskt material. Denna ihåliga tätning 18 sträcker sig kontinuerligt runt bottendelen 16 och är ansluten till en tryckmediekälla, lämpligen för tryckluft. Tråget 11 är mitt för tätningsringen 18 utformat med en slät runtomgående vertikal tätningsyta 19. Alternativt kan tätningsringen 18 givetvis anordnas på tråget 11 och tätningsytan 19 på botten- delen 16.The seal between the trough 11 and its bottom part 16 is provided by a hollow sealing ring 18 of elastic material arranged around the bottom part 16. This hollow seal 18 extends continuously around the bottom part 16 and is connected to a source of pressure medium, suitably for compressed air. The trough 11 is formed in the middle of the sealing ring 18 with a smooth circumferential vertical sealing surface 19. Alternatively, the sealing ring 18 can of course be arranged on the trough 11 and the sealing surface 19 on the bottom part 16.

För att säkerställa radiell expansion utåt av tät- ningsringen 18 ut mot tätningsytan 19 är tätningsringen 18 inpassad i ett spår 20 på trågbotten 16 så att expansion såväl inåt som uppåt och nedåt förhindras.To ensure radial expansion outwards of the sealing ring 18 towards the sealing surface 19, the sealing ring 18 is fitted in a groove 20 on the trough bottom 16 so that expansion both inwards and upwards and downwards is prevented.

I stängt läge trycksätts tätningsringen 18 och säker- ställer då en effektiv tätning mellan tråget 11 och dess bottendel 16. När tråget skall öppnas släpps först trycket i tätningsringen 18 varefter bottendelen 16 lätt kan sänkas.In the closed position, the sealing ring 18 is pressurized and then ensures an effective seal between the trough 11 and its bottom part 16. When the trough is to be opened, the pressure in the sealing ring 18 is first released, after which the bottom part 16 can be easily lowered.

Koppligen för trycksättning av tätningsringen 18 utformas lämpligen med ett säkerhetssystem som förhindrar förflyttning av trågbotten 16 då tätningen 18 är trycksatt.The coupling for pressurizing the sealing ring 18 is suitably designed with a safety system which prevents movement of the trough bottom 16 when the seal 18 is pressurized.

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

Claims (3)

501 710 Patentkrav501,710 Claims 1. Anordning för vätskebehandling och avvattning av materialsuspensioner, vilken anordning innefattar två cylind- riska roterbara vätskegenomsläppliga pressvalsar (10) vilka är anordnade i ett tråg (11) som delvis omsluter valsarna, varvid valsarna mellan sig bildar ett pressnyp (14) och där ett mot pressnypet konvergerande utrymme (12) bildas mellan trågets (11) bottendel (16) och vardera valsen (10) samt där trågets (11) bottendel (16) är öppningsbar, k ä n n e t e c k n a d av att tätningen mellan tråget (11) och dess bottendel (16) utgöres av en runtomgående ihålig tätningsring (18) och en motstående slät vertikal tätningsyta (19) varvid tätningsringen (18) är ansluten till en tryckmediekälla.'A device for liquid treatment and dewatering of material suspensions, which device comprises two cylindrical rotatable liquid-permeable press rollers (10) which are arranged in a trough (11) which partially encloses the rollers, the rollers forming a press nip (14) therebetween and where a space (12) converging towards the press nip is formed between the bottom part (16) of the trough (11) and each roller (10) and where the bottom part (16) of the trough (11) is openable, characterized in that the seal between the trough (11) and its bottom part (16) consists of a circumferential hollow sealing ring (18) and an opposite smooth vertical sealing surface (19), the sealing ring (18) being connected to a source of pressure medium. 2. Anordning enligt kravet 1, k ä n n e t e c k n a t av att tätningsringen (18) är anordnad på trågets bottendel (16) och tätningsytan (19) på tråget (11).Device according to claim 1, characterized in that the sealing ring (18) is arranged on the bottom part (16) of the trough and the sealing surface (19) on the trough (11). 3. Anordning enligt kravet 1 eller 2, k ä n n e t e C k- n a d av att anslutningen till tryckmediekällan är utformad med ett säkerhetssystem som förhindrar förflyttning av trågbotten (16) då tätningslisten (18) är trycksatt.Device according to claim 1 or 2, characterized in that the connection to the pressure medium source is designed with a safety system which prevents movement of the trough bottom (16) when the sealing strip (18) is pressurized.
SE9302897A 1993-09-08 1993-09-08 Pulp treatment and dewatering arrangement useful for paper mfr. - comprises press nip-forming liq.-permeable roll pair in trough with opening in base section with novel seal for simple opening and closing SE501710C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9302897A SE501710C2 (en) 1993-09-08 1993-09-08 Pulp treatment and dewatering arrangement useful for paper mfr. - comprises press nip-forming liq.-permeable roll pair in trough with opening in base section with novel seal for simple opening and closing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9302897A SE501710C2 (en) 1993-09-08 1993-09-08 Pulp treatment and dewatering arrangement useful for paper mfr. - comprises press nip-forming liq.-permeable roll pair in trough with opening in base section with novel seal for simple opening and closing

Publications (3)

Publication Number Publication Date
SE9302897D0 SE9302897D0 (en) 1993-09-08
SE9302897L SE9302897L (en) 1995-03-09
SE501710C2 true SE501710C2 (en) 1995-05-02

Family

ID=20391013

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9302897A SE501710C2 (en) 1993-09-08 1993-09-08 Pulp treatment and dewatering arrangement useful for paper mfr. - comprises press nip-forming liq.-permeable roll pair in trough with opening in base section with novel seal for simple opening and closing

Country Status (1)

Country Link
SE (1) SE501710C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6306259B1 (en) 1999-03-09 2001-10-23 Kvaerner Pulping Ab Device for the treatment of a fibrous suspension
WO2009075643A1 (en) * 2007-12-13 2009-06-18 Metso Paper, Inc. An apparatus for washing and dewatering pulp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6306259B1 (en) 1999-03-09 2001-10-23 Kvaerner Pulping Ab Device for the treatment of a fibrous suspension
WO2009075643A1 (en) * 2007-12-13 2009-06-18 Metso Paper, Inc. An apparatus for washing and dewatering pulp
US8337669B2 (en) 2007-12-13 2012-12-25 Metso Paper, Inc. Apparatus for washing and dewatering pulp

Also Published As

Publication number Publication date
SE9302897L (en) 1995-03-09
SE9302897D0 (en) 1993-09-08

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