US1761543A - Apparatus for and process of separating or extracting cellulose or paper pulp - Google Patents

Apparatus for and process of separating or extracting cellulose or paper pulp Download PDF

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Publication number
US1761543A
US1761543A US253310A US25331028A US1761543A US 1761543 A US1761543 A US 1761543A US 253310 A US253310 A US 253310A US 25331028 A US25331028 A US 25331028A US 1761543 A US1761543 A US 1761543A
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Prior art keywords
ring
digesters
digester
liquor
wash
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Expired - Lifetime
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US253310A
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English (en)
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Spencer Edmondson
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/14—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads
    • G01G19/16—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads having fluid weight-sensitive devices
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • 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

Definitions

  • This invention relates to improvements in the'separation or extraction of cellulose or paper-pulp from bamboo, wood, grasses, reeds or other suitable fibre yielding vegetable material by processes involving the treatment of the said materials with caustic or other digesting liquors in digesters.
  • This invention comprises apparatus for the semi-continuous extraction or separation of cellulose or paper pulp from bamboo, grasses;
  • the digesters are connected up in a double ring, and two ring pipes or trunks for transferring digester liquo t, make up li nor or wash water to and from the digestion in the double ring are provided, characterized by alternate digesters in the double ring being connected to alternate ring pipes by suitable valves and cocks so arranged that the alternate digesters may be operated independently in their closed rin circuits, suitable steam, liquor and was% water or the like connections being provided and connections for drawing olf spent liquors.
  • the apparatus also may include the feature according to which connection from the wash water-tanks are made to both liquor transferring rings with cocks, preferably pumps also, controlling the supply, and wherein separate tanks are provided similarly connected to both such rin s for receiving the first wash water and t e second or subsequent, wash water respectively, the arrangement being such that wash water which has been used at least once for wash- 100 mg out or leaching the contents of a digester (t e digestion in which is completed and which has been partially washed already) may, after use in the primary or an early washing of the next digester the digestion in which is finished, be transferred or pumped into the tank for receiving the second or several-times-used wash-water, connections being provided whereby the said wash-water from the last mentioned tank may be pumped or transferred as a primary wash to another digester the digestion in which is subsequently finished, or be used as make-up liquor in any of the digesters in the system.
  • the apparatus may be so arranged or modified that economy in time and in labour and in the continuous utilization of the services of the staff ma be effected by the simultaneous transfer or blowing over of liquors between two pairs (or more than two pairs, if the plant is sutficiently extensive and suitably arranged) of digesters at atime,
  • he invention also includes within its scope a process of semi-continuous extraction or separation by digestion of cellulose or paper pulp from material containing the same, which is adapted to be carried out in apparatus as herein explained, or is a modification of the kinds of processes such as are claimed in the previously mentioned Patent No.
  • 1,690,95i but is characterizedby the feature that, the digesters being linked up in two rings, or in a double ring alternate digesters ing ada ted to be connected to alternate rings for t e purposes of being blown over, a method of operation is available wherein, owing to the said two or double ring system being used, two digesters connected to one ring may be transferring the liquor or liquid contents one to the other simultaneously as two digesters in the other ring are similarly operating, whereby a saving of time may be eflected and the loading and unload- I ing of the digesters be facilitated.
  • the invention also includes such a process but wherein two pairs of digesters are simultaneously transferring their liquid contents one to the other, or wherein at least one pair is being operated in this manner and another digester is simultaneously discharging its spent liquors to the recovery plant or other desired destination, characterized by the feature that the transfers of the said liquid contents are over-lapped by sufficient amount to allow the staff to make all the necessary arrangements or connections for the one transfer to start or for that transfer to take place in over-lapped relation to the start or the carrying out of the other transfer, said second transfer being in its turn over-lapped with a third transfer, and so on, for the purpose of utilizing the time and service of the staff to the greatest efiiciency.
  • FIG. 1 is a diagram of a typical battery adapted to Work in a ring or closed continuous circuit on the cascade principle.
  • Fig. 2 is a detail of the connections.
  • This system is shown employing a stepdown pressure arrangement with an alternate ring series from the highest pressure digesters containing the strongest free caustic liquor and almost completely leached stockto the lowest pressure digesters with spent liquor and newly charged stock.
  • Figure 1 illustrates diagrammatically the arrangement with eight digesters in the cascade system Nos. 123 8 being the digesters with alternate ring pipe connections to ring mains R and R Digesters Nos. 1, 3, 5 and 7 are connected to ring R ghilst Nos. 2, 4, (i and 8 are connected to ring Digester N0. 1 is starting with bamboo or other fibrous material on its last stage of digestion under full pressure and with fresh strong caustic or other suitable digesting liquor supplied from the caustic or liquor.
  • the two outer pipe rings R3 and R4 represent the recovery pi e and thesteam' pipe rings respectively; he recovery pipe 6 used.
  • digester A for example is blowing liquor over to another digester the lower cock 18 would be opened to the pipe ring R1 (or R2 as the case might be) and the upper one 17 closed, while if receiving liquor from another digester, the upper cock 17 would be 0 ened and the lower one 18 closed.
  • digester No. 6 may be obtained from wash-water tanks W1 and lVil and would thus be more or less heated already. More water and further wash water tanks would in that case be used in washing Nos. 1 and 8 than otherwise in order to supply extra water in these two tanks lVl and W2 not only for use as make-up liquor for digesters Nos. 3, 4 and 5 but also to supply the water for No. 6.
  • the water for the preliminary treatment of digester No. 6 might however be supplied from tank W or from other source, and the same be heated up to the required temperature in No. 6 by admitting live steam through cock 21 from the steam ring R4.
  • the proportional number of digesters under extraction outof the total number in the cascade system can also be varied from two or three upwards, as may be found necessary to meet the requirements of the particular material to be digested.
  • the number of digesters in the washing, unloading, and loading and preliminary treatment-With-water sections of the cascade system can be regulated to suit the conditions of the particular operation in each case.
  • the desideratum will be that any particular operation in the cycle should not be responsible for a hold-up in the continuous uninterrupted operation of the system.
  • one digester in the unloading section of the'system would probably be sufiicient; whereas with hand unloading and the prolonged cooling period which would be necessary, two, or even three digesters might be required in the cooling and unloading section of the system.
  • Digestion may be proceeding practically continuously in the five or other number of stages selected.
  • Apparatus for the cascade extraction of cellulose pulp from fibre yielding vegetable -material comprising a plurality of digesters

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper (AREA)
US253310A 1927-01-20 1928-02-10 Apparatus for and process of separating or extracting cellulose or paper pulp Expired - Lifetime US1761543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN283910X 1927-01-20

Publications (1)

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US1761543A true US1761543A (en) 1930-06-03

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Family Applications (2)

Application Number Title Priority Date Filing Date
US253310A Expired - Lifetime US1761543A (en) 1927-01-20 1928-02-10 Apparatus for and process of separating or extracting cellulose or paper pulp
US253309A Expired - Lifetime US1690954A (en) 1927-01-20 1928-02-10 Process for the extraction of cellulose or paper pulp from fibrous vegetable matter containing the same

Family Applications After (1)

Application Number Title Priority Date Filing Date
US253309A Expired - Lifetime US1690954A (en) 1927-01-20 1928-02-10 Process for the extraction of cellulose or paper pulp from fibrous vegetable matter containing the same

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US (2) US1761543A (enrdf_load_stackoverflow)
FR (1) FR666661A (enrdf_load_stackoverflow)
GB (2) GB291064A (enrdf_load_stackoverflow)
NL (2) NL41972C (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675311A (en) * 1948-08-09 1954-04-13 John W Natwick Paper pulp process and apparatus
US2731345A (en) * 1953-02-27 1956-01-17 Jen I-Tsai Process of making alpha cellulose from fibrous ligno-cellulose materials, particularly from bagasse
US2938825A (en) * 1953-01-30 1960-05-31 Babcock & Wilcox Co Method of resisting digester corrosion

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747236C (de) * 1937-12-27 1944-09-15 Thueringische Zellwolle Ag Verfahren und Vorrichtung zur Herstellung eines veredelten Zellstoffes aus cellulosehaltigen Stoffen
FR997965A (fr) * 1945-09-15 1952-01-14 Du Pin Cellulose Procédé et dispositif pour le défibrage des matières cellulosiques ou analogues
US2607680A (en) * 1947-02-17 1952-08-19 Buckeye Cotton Oil Company Apparatus and method for processing vegetable fibers
US2625474A (en) * 1947-06-30 1953-01-13 Buckeye Cotton Oil Company Acid-alkali process for the preparation of cellulose fibers
US2639987A (en) * 1947-07-09 1953-05-26 Ass Pulp & Paper Mills Two-stage pulping process
US2675589A (en) * 1948-03-30 1954-04-20 Utley Thomas Sliding and swinging window structure
US2671727A (en) * 1948-05-05 1954-03-09 West Virginia Pulp & Paper Co Manufacture of pulp by the alkaline process
US2668110A (en) * 1948-06-18 1954-02-02 Spencer Method for fiber liberation in cotton stalks and the pulp
US2731183A (en) * 1952-03-14 1956-01-17 Ernest C Shaw Making oil filter cartridges
US2849315A (en) * 1953-05-07 1958-08-26 Haglund Gustaf Digestion of wood
US2724307A (en) * 1954-09-23 1955-11-22 Nat Gypsum Co Manufacture of wood-fiber hardboard
DE2747480C2 (de) * 1977-10-22 1979-08-30 Heinz Georg Thun Baus (Schweiz) Untere Führung für eine Schiebetrennwand
CN105984013A (zh) * 2015-02-09 2016-10-05 德清华梦木制品有限公司 一种仿实木雕刻板的制作方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675311A (en) * 1948-08-09 1954-04-13 John W Natwick Paper pulp process and apparatus
US2938825A (en) * 1953-01-30 1960-05-31 Babcock & Wilcox Co Method of resisting digester corrosion
US2731345A (en) * 1953-02-27 1956-01-17 Jen I-Tsai Process of making alpha cellulose from fibrous ligno-cellulose materials, particularly from bagasse

Also Published As

Publication number Publication date
FR666661A (fr) 1929-10-04
GB283910A (en) 1928-11-05
GB291064A (en) 1928-10-05
NL5561C (enrdf_load_stackoverflow)
US1690954A (en) 1928-11-06
NL41972C (enrdf_load_stackoverflow)

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