Bulletin . effect is in use by one of the firms making salt on thePacific coast. SWENSON Construction.—The Swenson evaporator (fig. 6) consists of fouressential parts—the evaporating chamber, the steam chest, thecone-shaped bottom, and the barometric leg. The evaporatingchamber is dome shaped and of sufficient height to prevent loss by * Craney, Thomas, U. S. Patent No. 525757, dated Sept. 11, 1894, and No. 531912, dated Jan. 1,1895. * Cole, L. H., The salt deposits of Canada and the salt industry: Canada Department of Mines, MinesBranch, 1915, pp. 120-122. Ill) TECHNOLOGY OF SALT
Bulletin . effect is in use by one of the firms making salt on thePacific coast. SWENSON Construction.—The Swenson evaporator (fig. 6) consists of fouressential parts—the evaporating chamber, the steam chest, thecone-shaped bottom, and the barometric leg. The evaporatingchamber is dome shaped and of sufficient height to prevent loss by * Craney, Thomas, U. S. Patent No. 525757, dated Sept. 11, 1894, and No. 531912, dated Jan. 1,1895. * Cole, L. H., The salt deposits of Canada and the salt industry: Canada Department of Mines, MinesBranch, 1915, pp. 120-122. Ill) TECHNOLOGY OF SALT MAKING. entrahunent. The steam chest is fitted at the top and bottom withtube plates, into which are expanded a number of 2J-inch coppertubes. The downtake is in the center of the steam chest, and is ofsufficient size to prevent the clogging of the salt crystals as they areformed. The brine circulates up through the copper tubes and downthe central downtake. The salt crystals, as formed, drop into the. Figube 6.—Swenson triple^eflect evaporator. quieter part of the cone-shaped bottom, through the barometric leginto the boot of an inclosed elevator, which drops them into thedrying bin. OPERATION. The operation of an evaporator of this type is continuous. Suit-able means are provided for the removal of the inclosed gas in thesteam chest as well as the condensed steam. The evaporators canbe operated either hi single or multiple effect. BUREAU OF MINES
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