US3677040A - Apparatus for the washing of primarily, cellulosic pulp - Google Patents

Apparatus for the washing of primarily, cellulosic pulp Download PDF

Info

Publication number
US3677040A
US3677040A US143441A US3677040DA US3677040A US 3677040 A US3677040 A US 3677040A US 143441 A US143441 A US 143441A US 3677040D A US3677040D A US 3677040DA US 3677040 A US3677040 A US 3677040A
Authority
US
United States
Prior art keywords
liquid
container
collecting
chamber
conduit
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
US143441A
Other languages
English (en)
Inventor
Bengt Edvard Pettersson
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.)
Valmet AB
Original Assignee
Sunds AB
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
Priority claimed from SE6812572A external-priority patent/SE402136B/xx
Application filed by Sunds AB filed Critical Sunds AB
Application granted granted Critical
Publication of US3677040A publication Critical patent/US3677040A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents

Definitions

  • the influx of the withdrawn liquid into the collecting chambers is interrupted, entirely or partly, at suitable intervals, in order to prevent clogging of the pervious walls of the collecting chambers and/or to facilitate the travel of material past or along said surfaces.
  • a liquid primarily water, which by means of a vibrator or some other means generates pulsations within the liquid.
  • FIG. 1 shows a vertical sectional view of part of an apparatus suitable for the practical use of the invention, the apparatus being connected to an upright container for the treatment of fibrous material;
  • FlG. 2 is a vertical sectional view on an enlarged scale, showing that part of the device which is located next to the gas- (air-) pulsator;
  • FIG. 3 shows, in a vertical sectional view and on an enlarged scale, a modified embodiment of supplying gas to the outside of a collecting chamber for withdrawn liquid.
  • Numeral 1 indicates part of the upper portion of an upright, preferably cylindrical container, adapted to be continuously traversed by material to be treated, preferably cellulosic pulp 2, in the direction indicated by the arrows A.
  • the entire room for introducing the treatment (washing) liquid is indicated by 3 and numeral 4 indicates a surface skimming means of a known kind stationarily mounted on a rotary shaft 5.
  • Numerals 6, 7 and 8 indicate supply chambers for washing liquid, which chambers may be stationarily and/or rotatably mounted. Also they may be embodied in a known manner, for instance as substantially vertically extending spray pipes or nozzles, which are movable along paths concentric with annular collecting chambers for withdrawn liquid in accordance with the disclosure of the U.S. Pat.
  • Numerals 9 and 10 indicate collecting chambers for withdrawn liquid, said chambers being preferabl devised as hollow annular sieves. With the collecting cham ers 9 and 10 there communicate one or more pipes 11 for leading away the withdrawn liquid by way of an overflow 12. With the collecting chambers 9 and 10 there also communicate at least one pipe 13, which is connected to a means for generating pressure variations by means of a gas, primarily air.
  • the means in question comprises a container 14, to which gas (air) is to be supplied.
  • a solenoid valve 15 controlled by, for instance, a time relay. Said time relay alternately connects the collection chambers with the pressure container 14 and with the atmosphere, respectively.
  • the generated pressure variations produce a pulsating flow of gas (air) and/or liquid through the slots or holes 16 in the walls of the collecting chambers 9 and 10, corresponding to the pulsating flow of liquid in the apparatus according to the aforementioned copending application, Ser. No. 720,717, Leffler, which facilitates the flowing of the withdrawn liquid (indicated by arrows B).
  • the limits of the level of liquid in the sieve is marked in FIG. 2 by a double arrow C.
  • Numeral 19 indicates a supply pipe for leading washing liquid to the chamber 8. As will appear from the just-mentioned co-pending application there are corresponding supply pipes leading also to the chambers 6 and 7. Finally treated material (washed pulp) leaves through the outlet 20.
  • the gas (air) is supplied through a pipe 17, provided with slots 18 and positioned at the lower portion of the collecting chamber.
  • the gas (air) is supplied on the outside of the chamber, so that, during the very pressure impulse, said outside is flushed with gas (air).
  • the functioning will then be such that gas (air) will enter between the outside of the chamber and the suspension of material by which clogging of the holes of the sieve will be prevented and at the same time the movement of the suspension will be facilitated.
  • An apparatus for liquid treatment of fibrous materials suspended in a liquid comprising an upright container, adapted to be traversed, in its axial direction, by a suspension to be subjected to liquid treatment, at least one means for supplying treatment liquid and at least one chamber for collecting withdrawn liquid, said means and chamber being provided within said container and being positioned within the suspension within said container, said means and chamber being located transversely of the container, means for delivering pressure impulses of a gas to the collecting chamber for withdrawn liquid
  • delivery means includes at least one conduit connecting the collecting chamber with said means for delivering time-controlled doses of compressed gas and operatively connected to said conduit, said delivery means comprising a container for gas under pressure connected to a time-controlled means.
  • An apparatus comprising an upright container of substantially cylindrical shape, adapted to be traversed, in its axial direction, by a suspension to be subjected to liquid treatment, at least one means for supplying treatment liquid being provided within said container and being positioned below the intended level of suspension within said container, and at least one chamber for collecting withdrawn liquid, arranged in a corresponding manner but displaced in the radial direction in the container, means for delivering a pulsated flow of a gas under pressure to the collecting chamber for withdrawn liquid which delivery means includes at least one conduit connecting the collecting chambers with said means for delivering time-controlled doses of compressed gas and operatively connected to said conduit.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
US143441A 1968-09-18 1971-05-14 Apparatus for the washing of primarily, cellulosic pulp Expired - Lifetime US3677040A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE6812572A SE402136B (sv) 1968-09-18 1968-09-18 Forfarande och anordning for vetskebehandling, foretredesvis tvettning, av fibersuspensioner av cellulosamassa
US85092369A 1969-08-18 1969-08-18
US476076A US3905766A (en) 1968-09-18 1974-06-03 Method for the liquid treatment of, primarily, cellulosic pulp

Publications (1)

Publication Number Publication Date
US3677040A true US3677040A (en) 1972-07-18

Family

ID=27354835

Family Applications (2)

Application Number Title Priority Date Filing Date
US143441A Expired - Lifetime US3677040A (en) 1968-09-18 1971-05-14 Apparatus for the washing of primarily, cellulosic pulp
US476076A Expired - Lifetime US3905766A (en) 1968-09-18 1974-06-03 Method for the liquid treatment of, primarily, cellulosic pulp

Family Applications After (1)

Application Number Title Priority Date Filing Date
US476076A Expired - Lifetime US3905766A (en) 1968-09-18 1974-06-03 Method for the liquid treatment of, primarily, cellulosic pulp

Country Status (3)

Country Link
US (2) US3677040A (xx)
FR (1) FR2019454A6 (xx)
GB (1) GB1287605A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985005A (en) * 1974-03-14 1976-10-12 Sunds Aktiebolag Apparatus for processing liquid-containing substance mixtures, particularly cellulose pulp
US4276167A (en) * 1979-04-25 1981-06-30 Kamyr Aktiebolag Diffuser arrangements
US20070056703A1 (en) * 2000-03-24 2007-03-15 Andritz Inc. Extraction with compaction and springback considerations

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE415202B (sv) * 1976-12-06 1980-09-15 Sunds Ab Anordning for koncentrering och/eller vetskebehandling av vetskehaltiga emnesblandningar
US4441224A (en) * 1982-05-04 1984-04-10 Laakso Oliver A Method of continuously treating a fibrous suspension
US4468319A (en) * 1982-05-04 1984-08-28 Laakso Oliver A Stationary diffuser
US5482594A (en) * 1991-08-21 1996-01-09 Salminen; Reijo Liquid removal apparatus and method for wood pulp
CN110241645B (zh) * 2019-06-28 2020-10-27 绍兴越元科技有限公司 一种造纸用湿式团结纤维纸浆分散用纤维分散设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078703A (en) * 1960-09-10 1963-02-26 Kamyr Ab Sieve arrangement in cylindrical containers for cellulosic pulp
US3348390A (en) * 1965-03-25 1967-10-24 Kamyr Ab Cellulosic material process vessel liquid distribution device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1214152A (en) * 1915-11-05 1917-01-30 Albert Legrand Genter Method and apparatus for cleansing filter mediums.
SE324950C (sv) * 1967-04-13 1977-02-28 Sunds Ab Forfarande och anordning for vetskebehandling foretredesvis tvettning av fibersuspensioner av cellulosamassa

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078703A (en) * 1960-09-10 1963-02-26 Kamyr Ab Sieve arrangement in cylindrical containers for cellulosic pulp
US3348390A (en) * 1965-03-25 1967-10-24 Kamyr Ab Cellulosic material process vessel liquid distribution device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985005A (en) * 1974-03-14 1976-10-12 Sunds Aktiebolag Apparatus for processing liquid-containing substance mixtures, particularly cellulose pulp
US4276167A (en) * 1979-04-25 1981-06-30 Kamyr Aktiebolag Diffuser arrangements
US20070056703A1 (en) * 2000-03-24 2007-03-15 Andritz Inc. Extraction with compaction and springback considerations
US7560008B2 (en) 2000-03-24 2009-07-14 Andritz Inc. Extraction with compaction and springback considerations

Also Published As

Publication number Publication date
DE1947092B2 (de) 1975-04-10
DE1947092A1 (de) 1970-09-17
FR2019454A6 (xx) 1970-07-03
US3905766A (en) 1975-09-16
GB1287605A (en) 1972-09-06

Similar Documents

Publication Publication Date Title
US3677040A (en) Apparatus for the washing of primarily, cellulosic pulp
ES2039849T3 (es) Lavadora de pasta.
US3729961A (en) Apparatus for the washing of preferably cellulosic pulp
US3014589A (en) Apparatus for dewatering suspensions, such as fibrous pulp suspensions
US2534324A (en) Process for separating cooking liquor from pulp
US3533507A (en) Granular filters backwash means
US2481959A (en) Method of producing a suspension of fibrous material
US3700548A (en) Apparatus and methods of continuous digesting
US3499577A (en) Method and apparatus for dosing powder
US2347850A (en) Paper machinery
JPH0418074B2 (xx)
GB1287790A (en) Apparatus for separating liquids from wet steam
KR860001604B1 (ko) 연속 목재펄프 섬유 세척장치 및 방법
US1823352A (en) Apparatus for bleaching textile fibers with a gaseous current, such as ozonized air
CA1057671A (en) Apparatus for processing liquid-containing substance mixtures, particularly cellulose pulp
GB1100128A (en) Improved method of and apparatus for determining the shives content or the content of fibre bundles of a pulp
US1954625A (en) Process of making chemical pulp and apparatus therefor
US3039842A (en) Method and means for cleaning articles
US2554163A (en) Water softener
US3218782A (en) Sonic defoaming system
NO135261B (xx)
SU363772A1 (xx)
SU676659A1 (ru) Устройство дл жидкостной обработки движущегос текстильного материала
GB888741A (en) Improvements in or relating to washing machines
SU510549A1 (ru) Установка дл промывки и отбелки целлюлозосодержащего материала