According to Mr. D'A. Bernard, it is especially important, in the dry
distillation of distiller's wash in a closed vessel, for the production
of methyls, ammonia, acetates, and methylamine, that the mass shall be
divided as completely as possible, since it then takes but a relatively
moderate heat to completely destroy the organic coloring matter
contained in the wash. The apparatus shown in Figs. 1 and 2 is based
upon this observation.
The wash enters, through the hopper, D, and the valve, z, a long boiler,
B, which is heated by the furnace, F, through the intermedium of a
waterbath, w. An agitator, E, moves the mass slowly to the other
extremity of the boiler, from whence it makes its exit in the form of
dust. To the frame, E, are fixed the scrapers, b, and the interrupted
pieces, a, in front of which are the hinged valves, c. In the motion of
the pieces, a, from right to left, these valves free the apertures
thereof and allow the wash to pass, while in the motion from left to
right the apertures are closed and the valves push the mass to be
evaporated before them.
From any motor whatever, the frame, E, receives a double to and fro
motion in a horizontal and vertical direction, the latter of which is
produced by the rods, f, which are provided at their lower, forked
extremity with rollers, e, over which passes the piece, d, that supports
the frame, E.
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