. Canadian forest industries 1897-1899. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. April, 1899 THE LUMBERMAN 15 with holes about X">nch in diameter. The pulp and water falls on this screen, and flows through to the tank under- neath, while all large splinters, chips, etc., are collected on the perforated plates. The stuff pump draws the pulp from this tank and discharges it in the large trough in the wet press room. The screen of plates prevents any large pieces from entering the stuff pump, which would cause trouble if allowed. The tro
. Canadian forest industries 1897-1899. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. April, 1899 THE LUMBERMAN 15 with holes about X">nch in diameter. The pulp and water falls on this screen, and flows through to the tank under- neath, while all large splinters, chips, etc., are collected on the perforated plates. The stuff pump draws the pulp from this tank and discharges it in the large trough in the wet press room. The screen of plates prevents any large pieces from entering the stuff pump, which would cause trouble if allowed. The trough into which the stuff pump discharges is made of 2y2 inch pine planks, its size depending on the capacity of the mill. A 15 ton mill would require one about 20 in. wide by 24 in. deep. This trough runs the whole length of the wet machine room and is tapped, at intervals, for each screen. Each outlet is provided with a trap gate, or if the outlets are wrought iron pipes, a valve is used. It is also necessary to provide the trough with an overflow connected to a pipe running back to the tank in the grinder room. This will be found extremely useful in case of a stoppage in the wet press room, if the stuff pump is not driven from the same water wheel as the wet machines. From the large trough the pulp is led to the vibrating diaphragm screens, a cut of which is shown in Fig. 10. This type of screen is in general use in America, and has been found very satisfactory. The machine is manufactured by the Jenckes Machine Co., of Sherbrooke, Que. These screens are built to contain ten or twelve plates as desired, the usual size of the plates being 12x36 inches or 12x40 inches. The cradle, or frame containing the screen plates, is hinged to the water box, and when raised, per- mits the cleaning or examination of the plates. The water box is built with a partition in the centre, forming two compartments, each of which is provided with a diaphragm, supported on two vertical spindles passi
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
