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US3130119A - Downfeed continuous pulping apparatus - Google Patents

Downfeed continuous pulping apparatus Download PDF

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Publication number
US3130119A
US3130119A US155681A US15568161A US3130119A US 3130119 A US3130119 A US 3130119A US 155681 A US155681 A US 155681A US 15568161 A US15568161 A US 15568161A US 3130119 A US3130119 A US 3130119A
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US
United States
Prior art keywords
vessel
particles
liquid
solid particle
adjacent
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
US155681A
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English (en)
Inventor
Lawrence A Carlsmith
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.)
Improved Machinery Inc
Original Assignee
Improved Machinery Inc
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 to DEI19881A priority Critical patent/DE1288900B/de
Application filed by Improved Machinery Inc filed Critical Improved Machinery Inc
Priority to US155681A priority patent/US3130119A/en
Application granted granted Critical
Publication of US3130119A publication Critical patent/US3130119A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • D21C7/00—Digesters
    • 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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting

Definitions

  • This invention relates to continuous pulping apparatus and systems, and is a continuation of application Serial No. 27,593, filed May 9, 1960. More particularly, it relates to novel apparatus for advancing solid particles through a vessel containing a solid particle liquid mixture, movement of the solid particles being controlled independently of the liquid.
  • FIG. 1 is a detailed cross sectional side elevation of downflow apparatus embodying the downfeeding means and discharge means of the invention
  • FIG. 2 is a cross sectional plan view showing the downfeeding means of FIG. 1, taken on the line 2-2 thereof;
  • FIG. 3 is an isometric detail view of the discharge means of the apparatus of FIG. 1.
  • FIGS. 1-3 a pretreatment downflow vessel 20 incorporating the novel downfeeding means of the invention, together with auxiliary apparatus including a chip bin 12 having a screw conveyor means 14 in its bottom for feeding wood chips into the upper end of vessel 20.
  • the infed wood chips are moved downwardly in the form of a compacted mass through vessel 20 while being treated by a suitable liq 'd, are diluted by the discharge means thereof, and are then discharged in dilute form, generally to a succeeding process.
  • the vessel 2% itself is of generally cylindrical form but preferably slightly tapered to expand in a downward direction say of the order of A to /2 inch per foot of length.
  • the downfeeding tamping means as is hereinafter described.
  • chip inlet opening 21 through which chip conveyor means 14 is enabled to feed chips into the vessel 2%) above said means.
  • An exhaust opening 19 is also provided in the top of the vessel in order to exhaust volative gases, such as turpentine, which may be evolved from the chip mass within the tower.
  • a discharge means enabling the feeding of chips from the lower end of the chip mass at the same rate that they enter the top, so that a solid particle-liquid mixture may be established in the bottom portion of vessel 20 for feeding to a subsequent reaction vessel.
  • liquid inlet 22 is provided at the bottom of the tower below the discharge means and a liquid outlet in the form of strainer 24 adjacent the upper end, as is hereinafter more fully described.
  • the novel downfeeding means of the invention utilized in vessel 20 to insure the downward advance of chips as a compacted mass comprises a single web-like member mounted adjacent the upper end of the vessel for generally vertical reciprocatory movement having a stroke of, say, about 3 to 24 inches.
  • said member includes a vertically arranged central shaft 31 having a plurality of spoke-like operating elements 31, herein shown as four in number, mounted on the lower end of shaft 30 and extending radially thereof with uniform angular spacing.
  • These operating elements 31 provide an interrupted operating surface extending in a horizontal plane for free passage of the wood chips or other solid particles therethrough.
  • the operating elements thus provide a downfeeding and tamping means extending generally throughout the horizontal area of the vessel substantially less than the horizontal sectional area of the vessel, with a working area of about l080 percent of the total vessel area, preferably about 20%.
  • the shaft 36 is mounted in a suitable bearing 32 near its lower end above elements 31 and at its upper end it carries a piston 36 which operates in a double acting cylinder 35 having suitable fluid inlet means to each chamber thereof as Well as means for supplying fluid to said inlets in a manner to reciprocate the piston at the rate of a few strokes per minute, say 1 to 30, and preferably about 5.
  • Shaft 39 is also provided with a gear 33 operated by a suitable fluid motor 39, so that the elements 31 may be rotated bodily around shaft 39 as desired. Such rotation may desirably be accomplished on the up stroke and may be through a small increment say about 10 degrees, so that the elements 31 come down at a different place on the chip pole on each reciprocation.
  • the downfeeding means of the invention makes possible the downward advance of the chips, even with countercurrent liquid flow or the generating of steam which would also tend to oppose their advance.
  • the uniformly compacted mass of chips extending throughout the eifective length of the vessel greatly aids in making possible uniform chip treatment, by preventing non-uniform channeling and blockage. This is particularly vital in large diameter vessels.
  • the discharge means as is best shown in isometric view in FIG. 3 in addition to being shown in side elevation in FIG. 1, comprises a pair of helical plates 49 having overlapping edges, say, by about 10 to 30 degrees and mounted for rotation at the upper end of a shaft 42, itself being driven by a motor 43.
  • a double lead screw discharger is provided having a pair of leading edges, which at a speed of say 30 r.p.m. will continuously take a thin slice from the bottom of the compacted mass of chips and so remove the chips from the mass as fast as the mass ad- .vances downwardly through the tower.
  • the speed of the plates and the pitch of their helical form are so proportioned that the thickness of the slice removed from the bottom of the chip mass never exceeds the pitch and the discharger can always accept material as fast as it is moved downwardly.
  • Below the plates 40 within vessel 20 is a zone of a dilute mixture of chips and liquid, of such consistency that can be easily transferred through a conventional pump and pipes into the bottom of a succeeding pressurized reaction vessel, for example.
  • the excess liquid required to operate this dilute zone is fed to the bottom of vessel 20 through inlet 23.
  • the overlapping arrangement of plates 40 insures that if the system is stopped long enough for chips to settle by gravity toward the bottom of vessel 20, the mass will come to rest on plates. 40 rather than filling the lower zone below these plates which might cause plugging in the outlet pipes when restarting.
  • Liquid inlet 22 is positioned below plates 40 and strainer 24 is positioned near the upper end of the tower below tamping members 31.
  • a pump 27 and heater 25 is provided for recirculating and heating the treating liquid and a valve 26 is connected thereto for adding liquid as it is discharged with the solid particle-liquid mixture.
  • a level sensing means 45 may be employed to sense the preferred level of the liquid above strainer 24 and below tamping members 31 as shown in FIG. 1, and such level sensing means may be operatively connected to valve 46 to control the balance of fluid into vessel 20 through pipe 47 and inlet 23 so as to maintain a constant level.
  • the flow of impregnating liquid is countercurrent, as is preferred for countercurrent heating and for deaerating in a wood chip pulping process, but by utilizing a strainer at the lower opening 22 co-current flow may be used.
  • Apparatus for continuously treating the solid particle component of a solid particle-liquid mixture in a generally upright elongated reaction vessel having inlet means for feeding solid particles into said vessel adjacent the upper end thereof and discharge means for discharging said mixture from said vessel adjacent the bottom of said vessel, that improvement which consists of down-feeding means for advancing the solid particle component thereof downwardly through said vessel substantially independently of the movement of liquid in said vessel, including a solid particle downfeeding member mounted adjacent the upper end of said vessel for generally vertical reciprocatory movement, said member having a plurality of spokelike operating elements with relatively flat bottoms providing an interrupted surface extending in a horizontal plane for free passage of said solid particles therethrough, means for feeding said solid particles into said vessel above said elements, hydraulic means including piston and cylinder means for reciprocating said member through a limited distance relatively to the length of said vessel to advance said particles downwardly by exerting force only on particles located adjacent the upper end of said vessel progressively to compact said particles and to advance the mass of said particles downwardly through said vessel, liquid supply means adjacent the bottom of said vessel for supplying liquid
  • Apparatus as claimed in claim 1 further including means for rotating said downfeeding member about a vertical axis.
  • Apparatus for continuously treating the solid particle component of a solid particle-liquid mixture in'a generally upright vertically elongated vessel having inlet means for feeding solid particles into said'vessel adjacent the upper end thereof and discharge means for discharging said mixture from said vessel adjacent the lower end thereof, that improvemnet which consists of downfeedin'g means for advancing the solid particle component of said mixture through said vessel substantaillyindependently of the movement of liquid in said vessel, said downfeeding means including a single solid particle downfeeding member having a plurality of spoke-like operating ele ments with relatively flat bottoms providing an interrupted surface extending in a horizontal plane with a working horizontal sectional area substantially less than the horizontal sectional area of said vessel for free passage of said solid particles through said surface, said member being mounted for generally vertical reciprocatory'movement adjacent the upper end of said vessel spaced above said discharge means a major portion of the length of said vessel providing an unobstructed vessel cross 'sectional area therebetween, means for reciprocating said member through a limited distance relatively to the length of said
  • Apparatus as claimed in claim 4 wherein the working area of said member is about 10 to percent of the area of said vessel.
  • Apparatus as claimed in claim 4 further including means for rotating said member.

Landscapes

  • Paper (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
US155681A 1960-05-09 1961-11-29 Downfeed continuous pulping apparatus Expired - Lifetime US3130119A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEI19881A DE1288900B (de) 1960-05-09 1961-05-08 Behaelter zum Behandeln zerkleinerter cellulosehaltiger Feststoffe
US155681A US3130119A (en) 1960-05-09 1961-11-29 Downfeed continuous pulping apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2759360A 1960-05-09 1960-05-09
US155681A US3130119A (en) 1960-05-09 1961-11-29 Downfeed continuous pulping apparatus

Publications (1)

Publication Number Publication Date
US3130119A true US3130119A (en) 1964-04-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US155681A Expired - Lifetime US3130119A (en) 1960-05-09 1961-11-29 Downfeed continuous pulping apparatus

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US (1) US3130119A (de)
DE (1) DE1288900B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467576A (en) * 1967-12-18 1969-09-16 James D A Clark Continuous treatment of fibrous material and apparatus
US4123318A (en) * 1976-06-29 1978-10-31 Kamyr, Inc. Three-vessel treatment system
US5772844A (en) * 1995-03-10 1998-06-30 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Process distributing fluffed pulp into a static bed reactor for gaseous treatment
US6051109A (en) * 1995-10-27 2000-04-18 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Apparatus for distributing fluffed pulp into a static bed reactor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3168397D1 (en) * 1980-11-20 1985-02-28 Simmering Graz Pauker Ag Process and apparatus for producing cellulose

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US57947A (en) * 1866-09-11 Improved apparatus for packing straw into boilers
US2089992A (en) * 1932-03-14 1937-08-17 Int Paper Co Continuous bleaching process and apparatus
US2121074A (en) * 1934-05-11 1938-06-21 Francis J Dooley Method and apparatus for digesting cellulosic material
US2150608A (en) * 1936-11-18 1939-03-14 Olier Sa Ets A Extraction column
US2217732A (en) * 1937-12-31 1940-10-15 Foster Wheeler Corp External circulating system for pulp digesters
US2723194A (en) * 1952-05-06 1955-11-08 Eleanor G Birdseye Process of separating bagasse pith and fiber
US2921962A (en) * 1958-06-20 1960-01-19 Gen Aniline & Film Corp Process of preparing poly-hydroxy arylophenones

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE886839C (de) * 1953-07-02 Phrix Werke Ag Verfahren und Vorrichtung zur kontinuierlichen Behandlung von cellulosehaltigen Ausgangsstoffen mit Kochfluessigkeiten
DE475119C (de) * 1925-08-28 1929-04-20 Gustav Ullmann Dr Verfahren zum Reinigen von Hochdruckkochern
DE562770C (de) * 1928-11-24 1932-10-28 Carl Leyst Kuechenmeister Vorrichtung zur Herstellung von Halbstoff oder Halbzellstoff
US1810845A (en) * 1930-03-19 1931-06-16 Morterud Einar Top screen for wood pulp digesters or the like
DE904376C (de) * 1951-08-28 1954-02-18 Georg Hockel Dipl Ing Verfahren und Vorrichtung zur Herstellung von Halbzellstoff aus verholzten Pflanzenfasern
DE1072078B (de) * 1956-01-26 1959-12-24 Improved Machinery Inc., Nashua, N. H. (V. St. A.) Kontinuierlich arbeitender stehender Zellstoffkocher
DE1070013B (de) * 1957-07-10 1959-11-26 Escher Wyss G.m.b.H., Ravensburg Verfahren und Einrichtung zur Behandlung faserhaltiger Stoffe bei der Erzeugung von Zellstoff oder Halbzellstoff

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US57947A (en) * 1866-09-11 Improved apparatus for packing straw into boilers
US2089992A (en) * 1932-03-14 1937-08-17 Int Paper Co Continuous bleaching process and apparatus
US2121074A (en) * 1934-05-11 1938-06-21 Francis J Dooley Method and apparatus for digesting cellulosic material
US2150608A (en) * 1936-11-18 1939-03-14 Olier Sa Ets A Extraction column
US2217732A (en) * 1937-12-31 1940-10-15 Foster Wheeler Corp External circulating system for pulp digesters
US2723194A (en) * 1952-05-06 1955-11-08 Eleanor G Birdseye Process of separating bagasse pith and fiber
US2921962A (en) * 1958-06-20 1960-01-19 Gen Aniline & Film Corp Process of preparing poly-hydroxy arylophenones

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467576A (en) * 1967-12-18 1969-09-16 James D A Clark Continuous treatment of fibrous material and apparatus
US4123318A (en) * 1976-06-29 1978-10-31 Kamyr, Inc. Three-vessel treatment system
US5772844A (en) * 1995-03-10 1998-06-30 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Process distributing fluffed pulp into a static bed reactor for gaseous treatment
US6051109A (en) * 1995-10-27 2000-04-18 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Apparatus for distributing fluffed pulp into a static bed reactor

Also Published As

Publication number Publication date
DE1288900B (de) 1969-02-06

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