EP0412250B1 - Dispositif de déshydratation en particulier filtre à bandes presseuses - Google Patents

Dispositif de déshydratation en particulier filtre à bandes presseuses Download PDF

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Publication number
EP0412250B1
EP0412250B1 EP90109712A EP90109712A EP0412250B1 EP 0412250 B1 EP0412250 B1 EP 0412250B1 EP 90109712 A EP90109712 A EP 90109712A EP 90109712 A EP90109712 A EP 90109712A EP 0412250 B1 EP0412250 B1 EP 0412250B1
Authority
EP
European Patent Office
Prior art keywords
dewatering
press rolls
drum
dewatering drum
press
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
EP90109712A
Other languages
German (de)
English (en)
Other versions
EP0412250A1 (fr
Inventor
Theodor Bähr
Ferenc Bilics
Hubert Polifke
Rolf Laible
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
Publication of EP0412250A1 publication Critical patent/EP0412250A1/fr
Application granted granted Critical
Publication of EP0412250B1 publication Critical patent/EP0412250B1/fr
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
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/02—Complete machines for making continuous webs of paper of the Fourdrinier type
    • 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

Definitions

  • the invention relates to a drainage device according to the preamble of claim 1.
  • a drainage device has become known from DE-A-21 38 072.
  • This device has already been improved in that the inlet box, which the suspension in front of the drainage drum area of feeds the dewatering drum directly around the sieving belt, has assigned an area in front of the approach point of the other sieving belt to this sieving belt, has given up the suspension to the first-mentioned sieving belt and has formed an inlet gap directly in front of the dewatering drum between the first and the second sieving belt by suitable deflection of the second sieving belt Has.
  • the object of the invention is to design such a device so that a higher throughput can be achieved and, above all, the input material density can be reduced by higher effectiveness of the initial drainage process.
  • the amount of suspension flowing into the inlet gap determines the throughput of the dewatering device to a large extent, if one disregards the regulation or setting of a number of revolutions of the dewatering drum or a circulation speed of the sieve belts.
  • the measure according to the invention ensures that a relatively gentle increase in the pressing pressure of the sieve belts is achieved in the area of the arcuate sliding guide at the inlet gap until it receives the first, higher value on the dewatering drum 4.
  • This arcuate sliding guide is favorably guided in the area of the inlet gap over a 15 ° circular sector ⁇ .
  • the belt pressure filter has two screen belts 1 and 2, which partly wrap around both the drainage drum 4, which is perforated on its circumference, and the downstream press rolls 9-13.
  • the radially inner sieve belt 2 is still guided over deflection rollers 26 and 27 and the radially outer sieve belt 1 with respect to the dewatering drum around the dewatering rollers 28-31.
  • an inlet gap 6 is formed, which is directed downwards, ie radially inwards, with respect to the loop of the sieve belt 2 lying directly against the dewatering drum 4 by an arranged there arcuate sliding guide, preferably made of slidable plastic material and partially perforated with sieves.
  • the water (liquid) pressed out of the suspension in the inlet gap can flow into the receiving trough 38.
  • the suspension is fed from the inlet box 40, to which it is fed through the inlet nozzle 41, onto the sieve belt 2 which is tightly fitting on the dewatering drum 4.
  • the amount of liquid which is already flowing out here and which passes through the sieve belt 2 also reaches the collecting box 38.
  • the drainage drum 4 has a perforated circumference, a screen covering preferably being placed over a perforated cylinder.
  • the drainage drum is closed off at the side by plates 34 provided with outlet openings 35.
  • the ends of the drainage drum are each supported in a bearing 32, which are supported on the upper support beam 20.
  • press rolls 9-11 of the lower row and 12 and 13 of the upper row two adjacent press rolls of the two rows each form a press nip with one another.
  • the press rolls 12 and 13 of the upper row are supported by hydraulic piston-cylinder units 14 and 15 against the upper support beam 20.
  • the central axes of the pressing elements 14 and 15 are inclined at an angle of approximately 70 ° and counter to the direction of the wire running to the connecting plane of the lower row of press rolls 9-11. This causes them to press the upper press rolls 12 and 13 against the lower press rolls 9-11 so that two press nips are formed on the upper press rolls.
  • the squeezed water (liquid) is collected in the lower collecting trough 36 and discharged via the discharge nozzle 37.
  • the entire device is supported on a base plate 48 via supports 45 and 46 which engage the lower cross support beam 21.
  • the upper cross support beam 20 is also supported on the lower cross support beam 21 via lateral support columns 22 and 23.
  • the deflection rollers as indicated in the case of the deflection roller 25, 33, are each held via similar bearings, with the exception here of the deflection roller 28, which is supported by a pivot lever 55 and a hydraulic pressure element 52 for the purpose of producing the fabric tension.
  • the radius of curvature K of the arcuate sliding guide 3 is at least three times the outer radius of the dewatering drum 4, and the outer radius R of the dewatering drum 4 is at least twice the smallest outer radius r of the press rolls 9-13.
  • This belt pressure filter also has the advantage that a relatively low starting material density can be used due to the relatively gentle, technologically very favorable dewatering process in the area of the inlet gap 6. Nevertheless, due to the good drainage effect, almost the same starting material density is obtained as with previous drainage systems of this type. Depending on the type of material, the input material density can be between 2.5 and 2.9%.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Filtration Of Liquid (AREA)
  • Paper (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Press Drives And Press Lines (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Confectionery (AREA)

Claims (6)

  1. Installation d'essorage particulièrement destinée à la concentration des fibres en suspension, comprenant un tambour d'essorage perforé (4) pour une première étape d'essorage, ainsi que des cylindres presseurs (9-13) en aval du tambour d'essorage parallèles entre eux et au tambour d'essorage et deux bandes-tamis qui sont enroulées en partie, autour du tambour d'essorage et autour des cylindres presseurs, tout en formant des intervalles de compression au nombre de (n-1), entre les cylindres presseurs correspondants, au nombre de (n), caractérisée :
       en en ce qu'un couloir d'entrée (6) est formé par un guide coulissant cintré (3) pour la bande-tamis (2) située radialement à l'intérieur contre le tambour d'essorage (4), le rayon de courbure (k) du guide coulissant cintré (3) étant au moins le triple du rayon extérieur (R) du tambour d'essorage (4), et le rayon extérieur (R) du tambour d'essorage (4) étant au moins le double du plus petit rayon extérieur (r) des cylindres presseurs (9-13).
  2. Installation d'essorage selon la revendication 1, caractérisée :
       en ce que le nombre de cylindres presseurs (9-13) est d'au moins quatre et
       en ce qu'ils sont placés substantiellement côte à côte en une rangée, aussi bien radialement à l'intérieur que radialement à l'extérieur par rapport à la boucle de la bande-tamis radiale intérieure (2), les cylindres presseurs (12,13) d'au moins une des rangées étant munis d'organes de compression (14,15) formant un angle aigu , plus particulièrement d'environ 70°, cet angle étant formé entre le plan reliant les axes longitudinaux médians de l'autre rangée des cylindres-presseurs (9-11) et l'axe des organes de compression, ces derniers axes étant inclinés vers l'amont par rapport à la direction de marche du tamis.
  3. Installation d'essorage selon la revendication 1 ou 2 caractérisée :
       en ce que les organes de compression (14,15) sont des ensembles cylindre-piston hydrauliques ou pneumatiques.
  4. Installation d'essorage selon l'une des revendications 1 à 3 caractérisée :
       en ce que les organes de compression (14,15) sont disposés radialement à l'intérieur de la boucle de la bande-tamis (2) qui est située radialement à l'intérieur par rapport au tambour d'essorage (4).
  5. Installation d'essorage selon l'une des revendications 1 à 4, caractérisée :
       en ce que les rangées de cylindres presseurs (9-11 et 12,13) sont disposées substantiellement de manière horizontale ou avec un écart maximal de 25° par rapport au plan horizontal.
  6. Installation d'essorage selon l'une des revendications 1 à 5, caractérisée :
       en ce que le rayon de courbure (k) du guide coulissant cintré (3) est environ le quadruple du rayon (R) du tambour d'essorage (4).
EP90109712A 1989-08-10 1990-05-22 Dispositif de déshydratation en particulier filtre à bandes presseuses Expired - Lifetime EP0412250B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3926440 1989-08-10
DE3926440A DE3926440A1 (de) 1989-08-10 1989-08-10 Entwaesserungseinrichtung insbesondere banddruckfilter

Publications (2)

Publication Number Publication Date
EP0412250A1 EP0412250A1 (fr) 1991-02-13
EP0412250B1 true EP0412250B1 (fr) 1993-08-25

Family

ID=6386865

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90109712A Expired - Lifetime EP0412250B1 (fr) 1989-08-10 1990-05-22 Dispositif de déshydratation en particulier filtre à bandes presseuses

Country Status (10)

Country Link
EP (1) EP0412250B1 (fr)
JP (1) JPH03130493A (fr)
KR (1) KR910004895A (fr)
AT (1) ATE93559T1 (fr)
BR (1) BR9004049A (fr)
CA (1) CA2022779A1 (fr)
DE (1) DE3926440A1 (fr)
DK (1) DK0412250T3 (fr)
ES (1) ES2045642T3 (fr)
FI (1) FI903948A0 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT402370B (de) * 1991-06-13 1997-04-25 Andritz Patentverwaltung Doppelsiebentwässerungseinrichtung
AT401069B (de) * 1993-06-23 1996-06-25 Leripa Kunststoff Gmbh & Co Kg Randabdichtung für entwässerungselemente
US20050027006A1 (en) 2003-07-28 2005-02-03 Reuben Matalon Methods and materials for treating conditions associated with metabolic disorders
EP2659828B1 (fr) 2011-11-25 2015-07-01 Olympus Medical Systems Corp. Endoscope

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH331868A (de) * 1954-09-18 1958-08-15 Voith Gmbh J M Vorrichtung zum Eindicken von Faserstoffaufschwemmungen
GB1288277A (fr) * 1969-02-03 1972-09-06
DE2138072B2 (de) * 1971-07-30 1973-10-31 J.M. Voith Gmbh, 7920 Heidenheim Banddruckfilter
EP0197731A3 (fr) * 1985-03-29 1988-07-06 The Black Clawson Company Procédé et dispositif pour l'épaississement d'une pâte à papier

Also Published As

Publication number Publication date
KR910004895A (ko) 1991-03-29
DK0412250T3 (da) 1993-11-01
ATE93559T1 (de) 1993-09-15
CA2022779A1 (fr) 1991-02-11
BR9004049A (pt) 1991-09-03
ES2045642T3 (es) 1994-01-16
EP0412250A1 (fr) 1991-02-13
FI903948A0 (fi) 1990-08-09
DE3926440A1 (de) 1991-02-14
JPH03130493A (ja) 1991-06-04

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