EP0993521A1 - Vorrichtung zur entwässerung von feststoff-flüssigkeitssuspensionen, insbesondere faserstoffsuspensionen - Google Patents
Vorrichtung zur entwässerung von feststoff-flüssigkeitssuspensionen, insbesondere faserstoffsuspensionenInfo
- Publication number
- EP0993521A1 EP0993521A1 EP98939588A EP98939588A EP0993521A1 EP 0993521 A1 EP0993521 A1 EP 0993521A1 EP 98939588 A EP98939588 A EP 98939588A EP 98939588 A EP98939588 A EP 98939588A EP 0993521 A1 EP0993521 A1 EP 0993521A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wedge
- roller
- deflection
- suspensions
- degrees
- 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.)
- Granted
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
- D21F1/80—Pulp catching, de-watering, or recovering; Re-use of pulp-water using endless screening belts
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/04—Arrangements thereof
Definitions
- the invention relates to a device for dewatering solid-liquid suspensions, in particular fiber suspensions, in which the suspension is dewatered between two belts, a dewatering zone being designed as a wedge zone.
- Such devices are e.g. known from AT 402.517.
- S-train rollers with a surface pressure are provided, and subsequently several press nips with a line pressure.
- the large number of deflection and press rolls results in a relatively long length of the machine.
- the aim of the invention is therefore to simplify the known device and to achieve a shorter and more compact design, as well as the associated cost reductions.
- a favorable further development of the invention is characterized in that the roller pair following the wedge zone exerts both a surface pressing force and a line pressing force on the fabric web formed from the fibrous suspension.
- the combination of the S-train rollers exerting the surface pressing force with a press nip with line pressing force means that two rollers can be omitted, resulting in a significantly shorter and more compact design. By eliminating the rollers and storage, the costs can also be reduced.
- An advantageous embodiment of the invention is characterized in that that the wedge height can be adjusted in height at its output end, in particular over the entire width of the web. This means that a wide variety of sheet weights can be produced.
- a favorable further development of the invention is characterized in that the first deflection and pressure roller of the pair of rollers is arranged below the end of the wedge zone and directly thereafter, the wedge zone being guided over the first subsequent deflection and pressure roller and the opposite part up to the gusset between the screen belt and roller can reach.
- An advantageous embodiment of the invention is characterized in that the wrap of the first deflection and pressure roller is between 10 and 90 degrees, preferably about 60 degrees.
- a further embodiment of the invention is characterized in that the wrap of the second deflection and pressure roller is between 30 and 120 degrees, preferably about 100 degrees.
- An advantageous development of the invention is characterized in that the wrap angle (s) is / are variable, in particular adjustable.
- FIG. 1 shows a drainage device according to the prior art
- FIG. 2 shows a drainage device according to the invention.
- An upper sieve or filter belt 4 runs over an upper deflection roller 6, which is adjustable and adjustable in its position, and subsequently over a deflection roller 7 in the wedge formed by the plates 10 and 11.
- the second screen or filter belt 5 also runs into the wedge via a corresponding deflection roller 8 and a further deflection roller 9.
- the material to be dewatered for example fibrous material, is likewise introduced into the wedge via a headbox 12.
- the upper part 10 of the wedge and the lower part 11 of the wedge are mechanically connected on the side of the headbox by means of a threaded spindle 13 and their distance can be adjusted.
- the belts 4 and 5 are deflected around the S-train rollers 21 and 22 with the fabric web lying between them, this resulting in further dewatering.
- the wedge upper part 10 is adjustable in height here by means of a pneumatic or hydraulic hose.
- the compressed air or hydraulic fluid is supplied via a connection 15. Stop screws 16 are used to limit the minimum or maximum adjustment.
- a sliding block 17 serves to absorb the axial forces.
- a holder 18 is provided for candle conversion, ie for the exchange of the endless sieve belts.
- a hood 19 is integrated with the upper part 10 of the boilers and a filtrate trough 20 with the lower part 11 of the wedge.
- the previous Lower deflection roller is therefore not necessary, which means that a much more compact design can be achieved.
- the two S-train rollers 21, 22 are designed here as deflection and pressure rollers.
- the roller 22 and the roller 21 are pressed by means of hydraulic cylinders 23, which results in a nip 24 with additional line force. This is followed by further pairs of press rolls 25, 26, so that the desired dryness can be achieved at the end of the dewatering device.
- the first deflection and pressure roller 21 of the pair of rollers is arranged here below the end of the wedge zone 10, 11 and directly thereafter, the wedge plate 10 being guided over the deflection and pressure roller 21 and the opposite part of the wedge plate 11 into the gusset between screen belt 5 and roller 21 is sufficient.
- the wrap of the first deflection and pressure roller 21 is approximately 60 degrees, while the wrap of the second deflection and pressure roller 22 is approximately 100 degrees.
- the invention is not limited by the examples, for example the arrangement of the deflection and pressure rollers could also be reversed, i.e. the first roller may be arranged at the top. Other adjustment and pressure mechanisms for the deflection rollers and the pressure rollers are also possible.
Landscapes
- Paper (AREA)
- Treatment Of Fiber Materials (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT112097A AT405656B (de) | 1997-07-01 | 1997-07-01 | Vorrichtung zur entwässerung von feststoff-flüssigkeitssuspensionen, insbesondere faserstoffsuspensionen |
AT112097 | 1997-07-01 | ||
PCT/EP1998/004046 WO1999001610A1 (de) | 1997-07-01 | 1998-07-01 | Vorrichtung zur entwässerung von feststoff-flüssigkeitssuspensionen, insbesondere faserstoffsuspensionen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0993521A1 true EP0993521A1 (de) | 2000-04-19 |
EP0993521B1 EP0993521B1 (de) | 2002-04-17 |
Family
ID=3507027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98939588A Revoked EP0993521B1 (de) | 1997-07-01 | 1998-07-01 | Vorrichtung zur entwässerung von feststoff-flüssigkeitssuspensionen, insbesondere faserstoffsuspensionen |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0993521B1 (de) |
JP (1) | JP4339412B2 (de) |
CN (1) | CN1105804C (de) |
AT (1) | AT405656B (de) |
AU (1) | AU8804898A (de) |
BR (1) | BR9810512A (de) |
CA (1) | CA2294389C (de) |
DE (1) | DE59803866D1 (de) |
WO (1) | WO1999001610A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE527778E (sv) | 2004-11-02 | 2014-09-30 | Valmet Technologies Inc | Förfarande och anordning vid en dubbelvirapress |
CA2657627A1 (en) * | 2009-03-10 | 2010-09-10 | Services Techniques Hds | Twin wire press |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT387379B (de) * | 1982-03-01 | 1989-01-10 | Andritz Ag Maschf | Einrichtung zur rueckbefeuchtung des filterkuchens an entwaesserungsmaschinen |
FI820776L (fi) * | 1982-03-05 | 1983-09-06 | Valmet Oy | Pressparti i pappersmaskin |
DE4024175A1 (de) * | 1990-06-06 | 1992-02-27 | Bernt U Treu | Verfahren und vorrichtung zum waschen von zellstoff |
EP0511951B1 (de) * | 1991-04-30 | 1995-10-11 | Huyck-Austria Gesellschaft M.B.H. | Siebbandpresse bzw. Manchon |
AT402951B (de) * | 1995-09-19 | 1997-10-27 | Andritz Patentverwaltung | Vorrichtung zur entwässerung von vfaserstoff-flüssigkeitsmischungen,insbesondere zellstoffsuspensionen |
AT402517B (de) * | 1995-11-10 | 1997-06-25 | Andritz Patentverwaltung | Vorrichtung zur entwässerung von feststoff-flüssigkeitssuspensionen, insbesondere zellstoffsuspensionen |
-
1997
- 1997-07-01 AT AT112097A patent/AT405656B/de not_active IP Right Cessation
-
1998
- 1998-07-01 JP JP50632999A patent/JP4339412B2/ja not_active Expired - Lifetime
- 1998-07-01 CA CA002294389A patent/CA2294389C/en not_active Expired - Lifetime
- 1998-07-01 EP EP98939588A patent/EP0993521B1/de not_active Revoked
- 1998-07-01 WO PCT/EP1998/004046 patent/WO1999001610A1/de active IP Right Grant
- 1998-07-01 BR BR9810512-4A patent/BR9810512A/pt not_active IP Right Cessation
- 1998-07-01 AU AU88048/98A patent/AU8804898A/en not_active Abandoned
- 1998-07-01 DE DE59803866T patent/DE59803866D1/de not_active Revoked
- 1998-07-01 CN CN98806820A patent/CN1105804C/zh not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9901610A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59803866D1 (de) | 2002-05-23 |
WO1999001610A1 (de) | 1999-01-14 |
AU8804898A (en) | 1999-01-25 |
CN1261936A (zh) | 2000-08-02 |
BR9810512A (pt) | 2000-09-05 |
CA2294389C (en) | 2007-10-30 |
ATA112097A (de) | 1999-02-15 |
JP4339412B2 (ja) | 2009-10-07 |
JP2002508814A (ja) | 2002-03-19 |
CA2294389A1 (en) | 1999-01-14 |
EP0993521B1 (de) | 2002-04-17 |
AT405656B (de) | 1999-10-25 |
CN1105804C (zh) | 2003-04-16 |
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