. Cane sugar; a textbook on the agriculture of the sugar cane, the manufacture of cane sugar, and the analysis of sugar-house products. e . opening in the stationary cylinder, and Fig. 148 those perforations in the outer cylinder that come opposite to the opening as the outer cylinder rotates. The lowers^stem is shown wdth the relative positions of the two cyhnders are also provided to vary the pressure exerted on the laj-er of bagasseby the upper system, and also the speed of rotation of the cylinders. Theobject of the device is mainly to bring the diluent under pressure in int
. Cane sugar; a textbook on the agriculture of the sugar cane, the manufacture of cane sugar, and the analysis of sugar-house products. e . opening in the stationary cylinder, and Fig. 148 those perforations in the outer cylinder that come opposite to the opening as the outer cylinder rotates. The lowers^stem is shown wdth the relative positions of the two cyhnders are also provided to vary the pressure exerted on the laj-er of bagasseby the upper system, and also the speed of rotation of the cylinders. Theobject of the device is mainly to bring the diluent under pressure in inti-mate and distributed contact with the layer of bagasse which is itself imderthat pressure at which experience has shown the absorption of water to beat a maximmn. Macerating Baths.—Instead of spraying the diluent on the bagasse, asystem of bath maceration is in use, and to this s^-stem the term macerationis not altogether inappropriate. In this system the dilute juice expressedfrom a mill is returned to a tank through which it flows in an opposite direc-tion to the bagasse ; the juice overflows at the end of the bath, and the. Fig. 149 water required is pimiped on to the bagasse immediately before it entersthe mill. This system is disclosed in Fryers patent 1073, of 1869, and sincethat date has formed the subject of a number of other patents with variousmodifications ; the form in which this process is generally appUed is indicatedin Gibsons patent (24206 of 1895), Fig. 149. 250 CHAPTER XI A variant of this system is seen in Kottmann s patent 17092 of 1884,which employs a rotating watertight drum wdth counter-current flow of patent (5431 of 1911) emplojs maceration with counter-currentflow, and recognises in addition that the juice expressed by the top andfront rollers is more dilute than that expressed by the top and back ; accord-ingly, the more dilute juice is collected separately and used in the bath, themore concentrated juice going direct to the boiling-
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsugar, bookyear1921
