Proceedings of the Annual Meeting of the Fire Underwriters' Association of the Pacific Volume 41-43

Proceedings of the Annual Meeting of the Fire Underwriters' Association of the Pacific Volume 41-43

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...incinerator must be safeguarded for if sacked without being properly cooled it will ignite the sacks or wood floor on which it may be stored, this having occurred in one plant. This hazard may be eliminated by conveying the hot char, as in some plants, to a rotary steel cooler before sacking or spreading to cool on a cement floor. In plants extracting the potassium chloride the processes are widely dissimilar and in most cages the owners of the plants regard thei-r work as a secret process and detailed study is not permitted the visitor. There are two general methods employed, one consists in leaching the kelp by water without preliminary drying, a process assisted by the natural decomposition which takes place if the material is allowed to stand in water. Tho resulting solutions are settled, filtered and reduced by evaporation until the salts are crystalized. This process is practically wet throughout. The other, the better known method, consists in leaching the salts from the kelp char or ash in vats, the solution being filtered in standard filter Presses and treated hot and cold for the separation of the sodium and Potassium chlorides from the sulphates, the evaporation being in open pans, heated by steam coils. The salts are purified by crystallization. The machinery in the evaporator building is operated by electric motor. The treatment begins at the top floor and works down step by Step fiml the excessive evaporation of the salts has a tendency to impregnate the timbers and other woodwork, thereby reducing the fire llfllflffl f the building, The fire hazards of drying the kelp are common to any calcining process and are minimized by steel retorts, properly Wlllillilted with sum' eient clearance from woodwork, as the...show more

Product details

  • Paperback | 224 pages
  • 189 x 246 x 12mm | 408g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236770935
  • 9781236770936