US3166300A - Storage container for cellulosic pulp and method of operation thereof - Google Patents

Storage container for cellulosic pulp and method of operation thereof Download PDF

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Publication number
US3166300A
US3166300A US269246A US26924663A US3166300A US 3166300 A US3166300 A US 3166300A US 269246 A US269246 A US 269246A US 26924663 A US26924663 A US 26924663A US 3166300 A US3166300 A US 3166300A
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United States
Prior art keywords
pulp
container
layers
horizontal
supplied
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Expired - Lifetime
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US269246A
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English (en)
Inventor
Johan C F C Richter
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Metso Fiber Karlstad AB
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Kamyr AB
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Publication date
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/28—Tanks for storing or agitating pulp

Definitions

  • circulation bins for pulp having a consistency of 3 to 4 percent. If such bins are to be used simultaneously for storage and mixing, they will be very extensive and costly and yet of merely a modest capacity on account of the low consistency of the pulp.
  • the present invention relates to a container suitable for storage as well as mixing of dense pulp, and also to a method of operating said storage container whereby an effective mixture and equalization of the pulp filling is obtained.
  • the essential feature of the method consists therein that the pulp, when charged, is spread over the container so that it is stored therein in superimposed horizontal layers, each of which extends at least over the greater part of the horizontal area of the container and contains pulp supplied approximately simultaneously, layers of various levels thus containing pulp supplied at different moments, and in that the pulp is discharged from the container by a vertical or inclined movement extending over the entire height of the pulp filling, so that pulp of the various horizontal layers is mixed into the discharged pulp.
  • the water jets are directed vertically or obliquely downwardly in such a manner that the water works simultaneously or with short intervals against the various horizontal pulp layers and at an inclined free front thereof.
  • the pulp mixture thus formed is flushed through bottom outlets out of the container.
  • a charging device preferably arranged above the container and driven with a continuous uni-directional or reciprocating horizontal movement in such a manner that an orifice or similar thereon successively sweeps over the container in order uniformly to distribute the fed pulp over the area of the container, the movement being so rapid and so often repeated that at any spot the filling will be built up of a considerable number of superimposed thin layers, eg to 50 layers.
  • the flushing-out of the pulp which preferably is performed by using flush water of a pressure of 25 to 50 lbs. per sq.
  • a flushing device comprising a pipe having one or more oscillating nozzles which are moved in parallel to themselves or are swung in a horizontal plane in a movement independent of the movement of the abovementioned feeding device, possible on account of the flushing device being located in another horizontal plane than the feeding device.
  • the storage container according to the invention in which the above-mentioned method of charging and discharging pulp can be practised, is essentially characterized by the provision of a charging device which is horizontally movable above the container for spreading of supplied pulp over the entire cross-sectional area of the container as thin horizontal layers, and by the provision of a device for flushing-out pulp which is likewise arranged above the container in order to be able simultaneously to flush pulp emanating from the various layers out through bottom outlets of the container, said flushing device being horizontally movable independently of the feeding device.
  • FIG. 1 shows a vertical cross-section of a preferred embodiment of the container
  • FIG. 2 shows a plan view thereof
  • FIG. 3 shows a vertical cross-section taken along the cylindrical face indicated by the line I-I in FIG. 2.
  • the container shown in the drawing consists of an upright cylindrical outer Wall 11, and a plane horizontal bottom 13.
  • the container is divided into two separate compartments preferably having equally great base areas.
  • Distributed over the bottom of the two compartments are outlet openings 17 grouped in radial rows.
  • Each row of openings 17 is partly covered by a low, radially directed wall 19 which projects from the bottom at an acute angle.
  • At least one of said walls of each compartment extends as a partition 21 (FIG. 3) up to the level of the upper edge of the walls 11, 15.
  • the dense pulp to be stored in the container is supplied by a band conveyer 31 to a charging device comprising a conduit 33 arranged to swingin a horizontal plane above the container and which is pivoted on a pillar 35 located at the center of the container, the outer end of said conduit 33 being supported by a motor-driven carriage 37 running on the upper edge of the wall 11.
  • a motor-driven screw conveyer 39 which takes care of pulp introduced into the conduit through a hopper 41 arranged at the inner end thereof and discharges said pulp through one or the other of two outlet openings 43, 45 arranged on the lower side of the conduit.
  • the inner opening 43 can be covered by a shutter 47 when the pulp is desired to pass to the outer openings 45.
  • a flushing device Located at a lower level than the above-described pulp charging device but yet above the container and pivotable in a horizontal plane is a flushing device comprising a horizontal flush water supply tube 51, attached to which are two nozzles 53, 55 which are pivotable in the vertical plane or in a steeply inclined plane, said plane being essentially parallel to the partition 21 (FIG. 3) when the flush water tube 51 is located approximately straight above said partition.
  • the flush water tube 51 is pivoted on the central pillar 35 and is connected to a supply tube 57 for water of a relatively moderate pressure, said tube extending through the pillar.
  • the outer end of the tube 51' is supported by a motor-driven carriage 59 which like the carriage 37 runs on the upper edge of the wall 11 but inwardly of the path of said last-mentioned carriage, so that the two carriages can pass each other unimpededly, the movement of the charging device thus being completely independent of the flushing device serving to discharge the pulp.
  • the charging device and the flushing device are active alternately, one being active when the other is inactive, and vice versa.
  • the provision of two compartments enables simultaneous continuous pulp feed and continuous pulp discharge, pulp being charged into one compartment dur ing intervals when pulp is discharged from the other, as shown in FIG. 1.
  • the discharge of pulp out of the filledcompartment takes place by a flushing operation by means of the pivoting nozzles 53, 55 and starts with saidnozzles in a position above the partition 21, so that a flow of diluted pulp can find its way along said partition to the outlet 17 wtihout the risk of pulp dropping down and obstructing the open passage thus formed.
  • Each of thenozzles 53 the pulp along a free front thereof extending along the entire height of the pulp filling and will therefore carry with it and mix pulp particles emanating from all the various layers.
  • the flush water dilutes the pulp to a consistency of e.g. approximately 3 percent, and the suspension flows through the next outlet 1'7 down into the collecting chamber 22 from where it is pumped further on.
  • the outlets 17 may be permanently open, because stored pulp of a consistency of 12 to '20 percent is too solid to be able to pass therethrough by itself.
  • the container may be given a rectangular base area, the feeding device as well as the flushing device then preferably being arranged for a reciprocating rectilinear movement above the container.
  • Method of storing and mixing cellulosic pulp in the pulp is discharged from the container by flushing with at least one flush water jet which is directed obliquely downwards in such a manner that thelwater'ima container, consisting in spreading pulp supplied to the container for storage therein by displacing the point of supply of pulp horizontally over the container at a rapid rate, whereby pulp supplied within a short time interval is distributed over the entire bottom area of the container as a thin horizontal sheet, forming a great number of superimposed thin pulp layers by repeating said spreading operation, and discharging pulp from said container by means of flush water brought to how in an inclined downwardly directed path across the pulp charge thereby bringing along and mixing pulp particles belonging to all of said layers into a suspension leaving the container.
  • a method for equalizing the properties of the pulp comprising: charging a first layer of pulp into the container, spreading said layer over at least the greater part of the horizontal area of the container, subsequently charging and spreading a plurality of superimposed horizontal layers of pulp onto said first layer one layer at a time so that each layer excepting the first layer contains pulp charged and spread subsequent to the pulp in the layer immediately below it; discharging the pulp from the container by serially re moving a plurality of inclined increments pulp from the container, each increment extending over substantially the entire height of the first pulp layer and the pulp layers superimposed thereon so that each increment discharged contains pulp from each pulp layer.
  • Method as claimed in claim 2 characterized in that pinges simultaneously upon at least a majority of the horizontal layers of the pulp charge at a progressively moving point with respect to the layers so as to define an inclined free front thereof and flushes the pulp mixture thus formed out of the container.
  • Method as claimed in claim 2 characterized in that the pulp is spread from a moving pulp dispenser with generally horizontal movement in such a manner that the pulp dispenser successively sweeps over dilferent parts of the container in order evenly to distribute the fed pulp over the entire area of the container, and in that the movement is that rapid and 'thatoften repeated that the charge will consist of 10 to, 50 superimposed thin horizontal layers.
  • Storage container for cellulosic pulp comprising means defining container sidewalls and a container bottom; means defining an outlet in said bottom; a device for feeding pulp to the container, said device comprising av conduit having means defining at least one dispensing opening therein, said conduit being horizontallymovable above the container in order to spread the pulp over the entire area of the container in the shape of thin horizontal layers, and a device for flushing pulp out of the container, which device likewise is arranged above the container in. order to be able simultaneously to flush pulp emanating from the various layers out through said bottom outlet of the container, said flushing device being horizontally movable independently of the feed device.
  • Container as claimed in claim 7 characterized in that the container is'cylindrical and that the feeding device and the flushing device are pivotable about an axis concentric to the container and arranged in different horizontal planes, so that they can move fully around and past each other without mutual interference.
  • Container as claimed in claim-7 characterized in that the flushing device comprises a horizontallymovable flush water supply pipe, to which are attached a plurality of nozzles pivotable in steeply inclined planes.
  • Container as claimed in claim 8, characterized in that the container is divided up by means of radially extending partitions which are somewhat inclined to the vertical, bottom outlets being arranged in the bottom of the container close to each of said partitions and on the side thereof forming an acute angle to the bottom.
  • Container as claimed in claim 8 characterized in that the container is divided up by means of a cylindrical wall into an inner container and an outer annular container, andthat the feeding device and the flushing device are adapted for work alternatingl'y in the inner and the outer container.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
US269246A 1962-04-16 1963-04-01 Storage container for cellulosic pulp and method of operation thereof Expired - Lifetime US3166300A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE418662 1962-04-16

Publications (1)

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US3166300A true US3166300A (en) 1965-01-19

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US (1) US3166300A (en:Method)
DE (1) DE1461008B1 (en:Method)
FI (1) FI41896B (en:Method)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337189A (en) * 1965-09-27 1967-08-22 John W Brown Lime-sulphur mixing machine
US3945615A (en) * 1972-10-19 1976-03-23 A. Ahlstrom Osakeyhtio Continuous method and device for withdrawing particulate material from a container
US5810473A (en) * 1995-12-11 1998-09-22 Taiho Industries Co., Ltd. Method for treating liquid in a tank and liquid jetting device used in the method
US20010028601A1 (en) * 2000-03-27 2001-10-11 Hisao Hiramatsu Method for strirring liquid
US20020129911A1 (en) * 2000-10-16 2002-09-19 Marcoccia Bruno S. Process and configuration for providing external upflow/internal downflow in a continuous digester
US20080298166A1 (en) * 2007-05-28 2008-12-04 Gustavo Cartagena Method and Apparatus for Preparation of Granulated Material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US756327A (en) * 1901-10-09 1904-04-05 William Carkeek Apparatus for distributing ore-pulp to concentrating-tables.
US923571A (en) * 1908-07-23 1909-06-01 Rapid Cyanide Extraction Company Pulp-agitator.
US1010244A (en) * 1911-04-22 1911-11-28 Jason W Fairfield Agitating and classifying device.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE521710C (de) * 1931-03-26 Foelsche Fa R Buettenentleerungseinrichtung
AT126812B (de) * 1928-12-21 1932-02-10 Franz Ing Krenn Verfahren und Vorrichtung zur Stapelung von Faserstoffen.
DE557063C (de) * 1929-03-22 1932-08-18 Carl Busch Thorne Verfahren zum Mischen und Verteilen von breiartigen Materialien, insbesondere Faserstoffbrei

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US756327A (en) * 1901-10-09 1904-04-05 William Carkeek Apparatus for distributing ore-pulp to concentrating-tables.
US923571A (en) * 1908-07-23 1909-06-01 Rapid Cyanide Extraction Company Pulp-agitator.
US1010244A (en) * 1911-04-22 1911-11-28 Jason W Fairfield Agitating and classifying device.

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337189A (en) * 1965-09-27 1967-08-22 John W Brown Lime-sulphur mixing machine
US3945615A (en) * 1972-10-19 1976-03-23 A. Ahlstrom Osakeyhtio Continuous method and device for withdrawing particulate material from a container
US5810473A (en) * 1995-12-11 1998-09-22 Taiho Industries Co., Ltd. Method for treating liquid in a tank and liquid jetting device used in the method
US20010028601A1 (en) * 2000-03-27 2001-10-11 Hisao Hiramatsu Method for strirring liquid
US7401971B2 (en) * 2000-03-27 2008-07-22 Arkray, Inc. Method for stirring liquid
US20020129911A1 (en) * 2000-10-16 2002-09-19 Marcoccia Bruno S. Process and configuration for providing external upflow/internal downflow in a continuous digester
US20080298166A1 (en) * 2007-05-28 2008-12-04 Gustavo Cartagena Method and Apparatus for Preparation of Granulated Material
US8100576B2 (en) * 2007-05-28 2012-01-24 Gustavo Cartagena Method and apparatus for preparation of granulated material

Also Published As

Publication number Publication date
FI41896B (en:Method) 1969-12-01
DE1461008B1 (de) 1970-07-02

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