WO1999001610A1 - Method for dehydrating solid-based liquid suspensions, specially fiber-based suspensions - Google Patents
Method for dehydrating solid-based liquid suspensions, specially fiber-based suspensions Download PDFInfo
- Publication number
- WO1999001610A1 WO1999001610A1 PCT/EP1998/004046 EP9804046W WO9901610A1 WO 1999001610 A1 WO1999001610 A1 WO 1999001610A1 EP 9804046 W EP9804046 W EP 9804046W WO 9901610 A1 WO9901610 A1 WO 9901610A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wedge
- roller
- deflection
- suspensions
- degrees
- 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
- D21F1/80—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.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98939588A EP0993521B1 (en) | 1997-07-01 | 1998-07-01 | Method for dehydrating solid-based liquid suspensions, in particular fiber-based suspensions |
DE59803866T DE59803866D1 (en) | 1997-07-01 | 1998-07-01 | DEVICE FOR DRAINING SOLID-LIQUID SUSPENSIONS, IN PARTICULAR FIBER-SUSPENSIONS |
CA002294389A CA2294389C (en) | 1997-07-01 | 1998-07-01 | Device for dewatering solid/liquid suspensions, especially pulp suspensions |
AU88048/98A AU8804898A (en) | 1997-07-01 | 1998-07-01 | Method for dehydrating solid-based liquid suspensions, specially fiber-based suspensions |
JP50632999A JP4339412B2 (en) | 1997-07-01 | 1998-07-01 | Equipment for dewatering solid / liquid suspensions, especially pulp suspensions |
BR9810512-4A BR9810512A (en) | 1997-07-01 | 1998-07-01 | Device for dehydrating solid and liquid suspensions, particularly fiber material suspensions |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA1120/97 | 1997-07-01 | ||
AT112097A AT405656B (en) | 1997-07-01 | 1997-07-01 | DEVICE FOR DRAINING SOLID-LIQUID SUSPENSIONS, IN PARTICULAR FIBER-SUSPENSIONS |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999001610A1 true WO1999001610A1 (en) | 1999-01-14 |
Family
ID=3507027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/004046 WO1999001610A1 (en) | 1997-07-01 | 1998-07-01 | Method for dehydrating solid-based liquid suspensions, specially fiber-based suspensions |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0993521B1 (en) |
JP (1) | JP4339412B2 (en) |
CN (1) | CN1105804C (en) |
AT (1) | AT405656B (en) |
AU (1) | AU8804898A (en) |
BR (1) | BR9810512A (en) |
CA (1) | CA2294389C (en) |
DE (1) | DE59803866D1 (en) |
WO (1) | WO1999001610A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006049548A1 (en) | 2004-11-02 | 2006-05-11 | Metso Paper Inc. | Method and apparatus of a twin-wire press |
WO2010102398A1 (en) | 2009-03-10 | 2010-09-16 | Services Techniques Hds | Twin wire press |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4481118A (en) * | 1982-03-01 | 1984-11-06 | Maschinenfabrik Andritz Actiengesellschaft | Method and apparatus for rinsing filter cake |
US4525241A (en) * | 1982-03-05 | 1985-06-25 | Valmet Oy | Press section of a paper machine |
EP0460638A1 (en) * | 1990-06-06 | 1991-12-11 | Bernt U. Treu | Process and apparatus for washing cellulosic pulp |
EP0511951A1 (en) * | 1991-04-30 | 1992-11-04 | Huyck-Austria Gesellschaft M.B.H. | Screening belt press, respectively sleeve |
WO1997011224A1 (en) * | 1995-09-19 | 1997-03-27 | Andritz-Patentverwaltungs-Ges. Mbh | Device for dewatering fibre-liquid mixtures, especially cellulose suspensions |
AT402517B (en) * | 1995-11-10 | 1997-06-25 | Andritz Patentverwaltung | DEVICE FOR DRAINING SOLID-LIQUID SUSPENSIONS, IN PARTICULAR CELLULAR SUSPENSIONS |
-
1997
- 1997-07-01 AT AT112097A patent/AT405656B/en not_active IP Right Cessation
-
1998
- 1998-07-01 JP JP50632999A patent/JP4339412B2/en not_active Expired - Lifetime
- 1998-07-01 BR BR9810512-4A patent/BR9810512A/en not_active IP Right Cessation
- 1998-07-01 AU AU88048/98A patent/AU8804898A/en not_active Abandoned
- 1998-07-01 CA CA002294389A patent/CA2294389C/en not_active Expired - Lifetime
- 1998-07-01 CN CN98806820A patent/CN1105804C/en not_active Expired - Lifetime
- 1998-07-01 WO PCT/EP1998/004046 patent/WO1999001610A1/en active IP Right Grant
- 1998-07-01 DE DE59803866T patent/DE59803866D1/en not_active Revoked
- 1998-07-01 EP EP98939588A patent/EP0993521B1/en not_active Revoked
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4481118A (en) * | 1982-03-01 | 1984-11-06 | Maschinenfabrik Andritz Actiengesellschaft | Method and apparatus for rinsing filter cake |
US4525241A (en) * | 1982-03-05 | 1985-06-25 | Valmet Oy | Press section of a paper machine |
EP0460638A1 (en) * | 1990-06-06 | 1991-12-11 | Bernt U. Treu | Process and apparatus for washing cellulosic pulp |
EP0511951A1 (en) * | 1991-04-30 | 1992-11-04 | Huyck-Austria Gesellschaft M.B.H. | Screening belt press, respectively sleeve |
WO1997011224A1 (en) * | 1995-09-19 | 1997-03-27 | Andritz-Patentverwaltungs-Ges. Mbh | Device for dewatering fibre-liquid mixtures, especially cellulose suspensions |
AT402517B (en) * | 1995-11-10 | 1997-06-25 | Andritz Patentverwaltung | DEVICE FOR DRAINING SOLID-LIQUID SUSPENSIONS, IN PARTICULAR CELLULAR SUSPENSIONS |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006049548A1 (en) | 2004-11-02 | 2006-05-11 | Metso Paper Inc. | Method and apparatus of a twin-wire press |
EP1807567A1 (en) * | 2004-11-02 | 2007-07-18 | Metso Paper, Inc. | Method and apparatus of a twin-wire press |
EP1807567A4 (en) * | 2004-11-02 | 2010-08-25 | Metso Paper Inc | Method and apparatus of a twin-wire press |
WO2010102398A1 (en) | 2009-03-10 | 2010-09-16 | Services Techniques Hds | Twin wire press |
EP2406427A1 (en) * | 2009-03-10 | 2012-01-18 | Services Techniques HDS | Twin wire press |
EP2406427A4 (en) * | 2009-03-10 | 2012-11-07 | Kadant Canada Corp | Twin wire press |
US8617357B2 (en) | 2009-03-10 | 2013-12-31 | Kadant Canada Corp. | Twin wire press |
US8852403B2 (en) | 2009-03-10 | 2014-10-07 | Kadant Canada Corp. | Twin wire press |
Also Published As
Publication number | Publication date |
---|---|
BR9810512A (en) | 2000-09-05 |
JP2002508814A (en) | 2002-03-19 |
AT405656B (en) | 1999-10-25 |
CA2294389C (en) | 2007-10-30 |
ATA112097A (en) | 1999-02-15 |
JP4339412B2 (en) | 2009-10-07 |
CN1261936A (en) | 2000-08-02 |
AU8804898A (en) | 1999-01-25 |
EP0993521A1 (en) | 2000-04-19 |
EP0993521B1 (en) | 2002-04-17 |
CN1105804C (en) | 2003-04-16 |
DE59803866D1 (en) | 2002-05-23 |
CA2294389A1 (en) | 1999-01-14 |
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