EP0993520A1 - Method for dehydrating solid-based liquid suspensions, specially fiber-based suspensions - Google Patents
Method for dehydrating solid-based liquid suspensions, specially fiber-based suspensionsInfo
- Publication number
- EP0993520A1 EP0993520A1 EP98939587A EP98939587A EP0993520A1 EP 0993520 A1 EP0993520 A1 EP 0993520A1 EP 98939587 A EP98939587 A EP 98939587A EP 98939587 A EP98939587 A EP 98939587A EP 0993520 A1 EP0993520 A1 EP 0993520A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wedge
- deflection
- roller
- 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
- 239000000835 fiber Substances 0.000 title claims abstract description 11
- 239000000725 suspension Substances 0.000 title claims abstract description 11
- 239000006194 liquid suspension Substances 0.000 title claims abstract description 5
- 239000007787 solid Substances 0.000 title abstract 2
- 239000004744 fabric Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 2
- 230000018044 dehydration Effects 0.000 abstract 1
- 238000006297 dehydration reaction Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 description 3
- 238000004904 shortening Methods 0.000 description 2
- 241000272525 Anas platyrhynchos Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
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.
- roller pair following the wedge zone exerts both a surface pressure force and a line pressure force on the fabric web formed from the fiber suspension.
- the combination of the S-train rollers exerting the surface pressure force with a press nip with line pressure force means that two rollers can be omitted, which results 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 the height of the wedge height is adjustable at its exit end, in particular over the entire web width. This enables a wide variety of sheet weights to be produced.
- a favorable development of the invention is characterized in that the first deflection and pressure roller of the pair of rollers below the end the wedge zone and directly after it is arranged, the wedge zone being guided over the first subsequent deflection and pressure roller and the opposite part can extend into the gusset between the belt and the roller.
- 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.
- a favorable embodiment of the invention is characterized in that only a single upper and / or lower deflecting roller is provided at the beginning of the wedge as a tension roller directly at the beginning of the wedge. This means that additional rollers can be saved, which leads to a corresponding shortening of the system and significant cost savings.
- a favorable further development of the invention is characterized in that the upper part of the wedge is in particular automatically, for example, elastic, adjustable and the opposite part is fixed.
- 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 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)
- Filtration Of Liquid (AREA)
- Drying Of Solid Materials (AREA)
- Treatment Of Fiber Materials (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0112297A AT404946B (en) | 1997-07-01 | 1997-07-01 | DEVICE FOR DRAINING SOLID-LIQUID SUSPENSIONS, IN PARTICULAR FIBER-SUSPENSIONS |
AT112297 | 1997-07-01 | ||
PCT/EP1998/004045 WO1999001609A1 (en) | 1997-07-01 | 1998-07-01 | Method for dehydrating solid-based liquid suspensions, specially fiber-based suspensions |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0993520A1 true EP0993520A1 (en) | 2000-04-19 |
EP0993520B1 EP0993520B1 (en) | 2002-09-18 |
Family
ID=3507066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98939587A Expired - Lifetime EP0993520B1 (en) | 1997-07-01 | 1998-07-01 | Method for dehydrating solid-based liquid suspensions, specially fiber-based suspensions |
Country Status (10)
Country | Link |
---|---|
US (1) | US6338773B1 (en) |
EP (1) | EP0993520B1 (en) |
JP (1) | JP4461202B2 (en) |
CN (1) | CN1134568C (en) |
AT (1) | AT404946B (en) |
AU (1) | AU8804798A (en) |
BR (1) | BR9810959A (en) |
CA (1) | CA2294903C (en) |
DE (1) | DE59805627D1 (en) |
WO (1) | WO1999001609A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT408461B (en) * | 1999-11-17 | 2001-12-27 | Andritz Ag Maschf | DEVICE FOR DRAINING A FIBROUS MATERIAL |
SE516830C2 (en) | 2000-08-01 | 2002-03-12 | Metso Paper Inc | Twin-wire press |
AT412483B (en) * | 2003-03-26 | 2005-03-25 | Andritz Ag Maschf | METHOD AND DEVICE FOR MOORING FIBROUS MATERIALS |
SE526798C2 (en) * | 2004-03-22 | 2005-11-08 | Metso Paper Inc | Double wire press with height and adjustable drainage table |
SE527250C2 (en) * | 2004-06-14 | 2006-01-31 | Metso Paper Inc | Frame for twin-wire press to dewater fiber suspension and form continuous web has pair of longitudinal side members releasably connected by distance elements and having upper and lower side members with flat sheet metal elements |
US7381329B1 (en) * | 2006-11-07 | 2008-06-03 | William Harris Moss | Belt press apparatus and method for high solids capture and high solids content |
EP2342380A4 (en) * | 2008-05-28 | 2012-04-11 | Metso Paper Inc | Twin wire press and method for dewatering a fibre suspension |
US7964105B2 (en) * | 2008-08-07 | 2011-06-21 | William Harris Moss | Method for improving belt press dewatering |
US8092691B2 (en) * | 2009-03-09 | 2012-01-10 | Univenture, Inc. | Method and apparatus for separating particles from a liquid |
SE535614C2 (en) | 2010-12-22 | 2012-10-16 | Metso Paper Sweden Ab | Method and apparatus for improving dewatering in a double-wire press |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT387379B (en) * | 1982-03-01 | 1989-01-10 | Andritz Ag Maschf | DEVICE FOR HUMIDIFYING THE FILTER CAKE ON DRAINAGE MACHINES |
FI820776L (en) * | 1982-03-05 | 1983-09-06 | Valmet Oy | PRESSPARTI I PAPPERSMASKIN |
AT385681B (en) * | 1986-08-18 | 1988-05-10 | Andritz Ag Maschf | PRINTING DEVICE FOR MACHINES OR PROVIDED MACHINE FOR DRAINING OR FILTER OR FOR PRESSED GOODS |
DE4024175A1 (en) * | 1990-06-06 | 1992-02-27 | Bernt U Treu | METHOD AND DEVICE FOR WASHING PULP |
EP0511951B1 (en) * | 1991-04-30 | 1995-10-11 | Huyck-Austria Gesellschaft M.B.H. | Screening belt press, respectively sleeve |
AT402951B (en) * | 1995-09-19 | 1997-10-27 | Andritz Patentverwaltung | DEVICE FOR DRAINING VIBRANT-LIQUID MIXTURES, IN PARTICULAR CELLULAR 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 AT0112297A patent/AT404946B/en not_active IP Right Cessation
-
1998
- 1998-07-01 AU AU88047/98A patent/AU8804798A/en not_active Abandoned
- 1998-07-01 WO PCT/EP1998/004045 patent/WO1999001609A1/en active IP Right Grant
- 1998-07-01 DE DE59805627T patent/DE59805627D1/en not_active Expired - Fee Related
- 1998-07-01 BR BR9810959-6A patent/BR9810959A/en not_active IP Right Cessation
- 1998-07-01 JP JP50632899A patent/JP4461202B2/en not_active Expired - Lifetime
- 1998-07-01 CA CA002294903A patent/CA2294903C/en not_active Expired - Lifetime
- 1998-07-01 US US09/445,971 patent/US6338773B1/en not_active Expired - Lifetime
- 1998-07-01 CN CNB988068214A patent/CN1134568C/en not_active Expired - Lifetime
- 1998-07-01 EP EP98939587A patent/EP0993520B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9901609A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1134568C (en) | 2004-01-14 |
US6338773B1 (en) | 2002-01-15 |
AT404946B (en) | 1999-03-25 |
DE59805627D1 (en) | 2002-10-24 |
WO1999001609A1 (en) | 1999-01-14 |
CA2294903C (en) | 2008-10-21 |
JP2002508813A (en) | 2002-03-19 |
BR9810959A (en) | 2000-09-26 |
CN1261937A (en) | 2000-08-02 |
JP4461202B2 (en) | 2010-05-12 |
AU8804798A (en) | 1999-01-25 |
EP0993520B1 (en) | 2002-09-18 |
ATA112297A (en) | 1998-08-15 |
CA2294903A1 (en) | 1999-01-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0571581B1 (en) | Roll press | |
DE3750037T2 (en) | Belt roller press. | |
DE2155547C3 (en) | Device for dewatering a flexible paper web supported by a porous belt | |
AT402517B (en) | DEVICE FOR DRAINING SOLID-LIQUID SUSPENSIONS, IN PARTICULAR CELLULAR SUSPENSIONS | |
DE2152960A1 (en) | Paper machine | |
AT404946B (en) | DEVICE FOR DRAINING SOLID-LIQUID SUSPENSIONS, IN PARTICULAR FIBER-SUSPENSIONS | |
DE2616517A1 (en) | PRESS FOR DEWATERING OF FABRICS OR DGL. FIBER MATERIAL | |
DE3142657C2 (en) | Drainage device | |
EP0837181B1 (en) | Press section | |
DE19852431B4 (en) | Plant for web drying of a fibrous web | |
EP1111126B1 (en) | Press section | |
DE10159115A1 (en) | press section | |
EP0993521B1 (en) | Method for dehydrating solid-based liquid suspensions, in particular fiber-based suspensions | |
AT408461B (en) | DEVICE FOR DRAINING A FIBROUS MATERIAL | |
DE19902139A1 (en) | Press arrangement | |
DE4443875C2 (en) | Long nip press | |
WO1997011224A1 (en) | Device for dewatering fibre-liquid mixtures, especially cellulose suspensions | |
EP0799931A1 (en) | Cylinder press | |
AT395185B (en) | Apparatus for treating, in particular separating, fibre/liquid mixtures | |
DE19741425B4 (en) | roll press | |
DE7409841U (en) | DEVICE FOR DRAINING SUSPENSIONS | |
AT408998B (en) | Apparatus for dewatering a fibrous web | |
DE19980188B9 (en) | Method and apparatus for forming fiberboard | |
DE19833423A1 (en) | Press rollers to extract water from a web fiber web has the upper roller set back to give a structured path through the press gap to reduce lateral forces to a minimum | |
EP0254899A1 (en) | Drainage apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19991202 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FI SE |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ANDRITZ AG |
|
17Q | First examination report despatched |
Effective date: 20010108 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FI SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020918 |
|
REF | Corresponds to: |
Ref document number: 59805627 Country of ref document: DE Date of ref document: 20021024 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20021218 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20030619 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040203 |