EP1944410A1 - Procédé pour transporter une suspension fibreuse - Google Patents

Procédé pour transporter une suspension fibreuse Download PDF

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Publication number
EP1944410A1
EP1944410A1 EP07118786A EP07118786A EP1944410A1 EP 1944410 A1 EP1944410 A1 EP 1944410A1 EP 07118786 A EP07118786 A EP 07118786A EP 07118786 A EP07118786 A EP 07118786A EP 1944410 A1 EP1944410 A1 EP 1944410A1
Authority
EP
European Patent Office
Prior art keywords
pressure
partial flow
pulp suspension
turbine
fuel pump
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
Application number
EP07118786A
Other languages
German (de)
English (en)
Other versions
EP1944410B1 (fr
Inventor
Johannes Ecker
Stefan Hartmann
Erwin Binder
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.)
Voith Patent GmbH
Original Assignee
Voith Patent 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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1944410A1 publication Critical patent/EP1944410A1/fr
Application granted granted Critical
Publication of EP1944410B1 publication Critical patent/EP1944410B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • Such processes serve to guide the pulp suspension required for paper production through a closed system, in particular through pipelines and apparatus. It may also be necessary to reduce the pressure at certain points of the system used.
  • throttling acting control elements are used to adjust pressures and the flow rate to meet the requirements of the system accordingly.
  • Such methods are conceivable in the stock preparation of a paper mill and in particular in the so-called constant part, ie the part of the plant, which is connected directly upstream of the headbox. It is hitherto accepted that the pressure energy at the throttle point is converted into mostly useless heat.
  • problems can occur if pressure pulsations arise in the pulp suspension. These can, if they reach the headbox, interfere with their operation and thus permanently impair the quality of the product (paper or cardboard) produced.
  • One cause is in the actuators that are required to change the flow rate of the pulp suspension or their pressure.
  • Such actuators are usually adjustable slides or valves.
  • the invention is based on the object, a method of o.g. To create a way to avoid the mentioned disadvantages.
  • Suitable turbines are used almost exclusively to generate electric current from flowing pressurized water by means of a connected generator.
  • they are driven in a paper mill with a pulp suspension, namely where, for process engineering reasons, a reduction in the pressure of the pulp offered or at least harmless.
  • a pulp suspension S is produced in the usual way by mixing a thick stock suspension 4 with a diluting liquid and thereafter has substantially the desired consistency for the operation of the headbox 1 of the paper or board machine 2 at this point.
  • headbox consistencies range between 0.5 and 2%, usually around 1%.
  • the dilution liquid which is supplied at a mixing point 3 originates in the example shown here predominantly from the first white water 15, that is, the water accumulated in the forming area of the paper or board machine 2. It is often referred to as white water I (SWI) in contrast to the later occurring on the paper machine white water, which contains much less fines.
  • a further fuel pump 10 can be installed between accept line 18 of the cleaner system 13 and inlet to the sorting system 11 for pressure increase.
  • the effort that must be done for these hydrocyclones and sorters will depend on the raw materials as well as the quality requirements of the paper produced. If, for example, the Dickstoffsuspension 4 was formed from waste paper, sand and small plastic parts may be present.
  • the fuel pump 10 may be designed so that gas is sucked off in its central inlet region.
  • this subset 19 is passed into a turbine 5, in which the pressure is reduced.
  • This mechanical power is applied, which is connected in the example shown here via a clutch or a gearbox 8 with the fuel pump 10.
  • the turbine can be provided with adjustable guide vanes.
  • An easy to implement possibility is also the conversion into electricity by means of a generator.
  • the plant example shows yet another possibility for the application of the inventive concept, namely, where at the pressure sorter 12, a partial stream 20 is led out as a reject.
  • the reject flow of a pressure sorter is formed by a partial flow which has not passed through the sieve.
  • the pressure of this partial flow 20 is also very high, possibly even higher than in the headbox 1 can be.
  • a turbine 6 can again recover the mechanical power resulting from the pressure reduction.
  • the turbine 6 is connected to a generator 7 for generating electricity.

Landscapes

  • Paper (AREA)
EP07118786A 2007-01-12 2007-10-18 Procédé pour transporter une suspension fibreuse Not-in-force EP1944410B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007001848A DE102007001848A1 (de) 2007-01-12 2007-01-12 Verfahren zur Förderung einer Faserstoffsuspension, insbesondere im Konstanten Teil vor einem Stoffauflauf einer Papier- oder Kartonmaschine

Publications (2)

Publication Number Publication Date
EP1944410A1 true EP1944410A1 (fr) 2008-07-16
EP1944410B1 EP1944410B1 (fr) 2010-12-15

Family

ID=38736045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07118786A Not-in-force EP1944410B1 (fr) 2007-01-12 2007-10-18 Procédé pour transporter une suspension fibreuse

Country Status (3)

Country Link
EP (1) EP1944410B1 (fr)
AT (1) ATE491840T1 (fr)
DE (2) DE102007001848A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009010037A1 (de) * 2009-02-21 2010-08-26 Voith Patent Gmbh Anordnung zur Druckreduzierung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859770A1 (de) * 1998-06-29 1999-12-30 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Mischen von Sroffsuspension
US20010018958A1 (en) * 1999-12-16 2001-09-06 Valmet-Karlstad Aktiebolag Arrangement and method for recovery of energy in a paper machine
US6723205B1 (en) * 1999-06-03 2004-04-20 Fom Technology Oy Ab Degassing centrifugal apparatus with energy recovery, process for degassing a fluid and process for producing paper or board

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859770A1 (de) * 1998-06-29 1999-12-30 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Mischen von Sroffsuspension
US6723205B1 (en) * 1999-06-03 2004-04-20 Fom Technology Oy Ab Degassing centrifugal apparatus with energy recovery, process for degassing a fluid and process for producing paper or board
US20010018958A1 (en) * 1999-12-16 2001-09-06 Valmet-Karlstad Aktiebolag Arrangement and method for recovery of energy in a paper machine

Also Published As

Publication number Publication date
ATE491840T1 (de) 2011-01-15
DE102007001848A1 (de) 2008-07-17
EP1944410B1 (fr) 2010-12-15
DE502007005943D1 (de) 2011-01-27

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