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Improvements in the Manufacture or Treatment of Pulp for use in the Manufacture of Paper and other like Materials and Apparatus therefor

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  • Title:
    Improvements in the Manufacture or Treatment of Pulp for use in the Manufacture of Paper and other like Materials and Apparatus therefor
  • Author: HERMAN ARLEDTER
  • Subjects: APPARATUS THEREFOR ; PAPER-MAKING ; PRODUCTION OF CELLULOSE ; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS ; REGENERATION OF PULPING LIQUORS ; TEXTILES
  • Description: 2018. Arledter, H. Jan. 26. Pulp, preparation of; pulping-engines; sizing and weighting.-In treating fibres, pulp, or other substances in the manufacture of paper, pasteboard, &c., and in apparatus therefor, the beating, disintegrating, washing, bleaching, mixing, dyeing, weighting, and other processes are conducted in an hermetically sealed vessel under pressure, or in a vacuum. Pulp, usually mixed in an ordinary beater or mixer, is sucked into the chamber A through the inlet pipe B. Sizing and colouring matters are added as required by means of pipes C, and the apparatus may be heated by a steam-jacket E. The material in the chamber A is pumped by the pump H at a high rate of speed to the disintegrator N having an adjustable bed-plate Q, which is brought nearer the revolving knives as the material becomes finer Increased pressure in the apparatus forces the liquids into the fibres, and vacuum prevents frothing during disintegration, allows liquids to saturate the fibrous materials, and ensures perfect sizing, colouring, and weighting, with a saving of time. Application is made possible in the closed apparatus of easily volatile substances such as ammonia, carbonate of ammonia, chlorine, oxygen, carbonic acid, or other gases, alcohol, ether, light oils, spirits, bisulphide of carbon, acetone, formaldehyde and the like, such volatile substances being afterwards recoverable. Wood pulp, when treated under vacuum, swells up, and the swollen knotted particles are reduced by the disintegrator, the wood pulp becoming practically equal to chemical pulp. Mechanical pulp can be changed to chemical pulp by extracting resinous incrustations with ammonia or other alkali or alkali salt in the apparatus. More than one circulating-pump may be used, and additional steam-coils if desired. Sight-holes are provided at T and U.
  • Creation Date: 1911
  • Language: English
  • Source: esp@cenet
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