Improvements in and relating to the Automatic Discharge of Charcoal Kilns.
Year: 1891

page_text: Date of Application, 7th July, 1891-Accepted, 5th Sept., 1891
CUILL DELD DI. MULTICATION.
Improvements in and relating to the Automatic Discharge of
Charcoal Kilns.
1, ALEXANDER ORKNEY, Consulting Engineer, residing at 6 Glen Street,
Greenock, in Renfrewshire, Scotland, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
The invention relates to kilns for reburning or revivifying charcoal, for the
filtration and clarification of sugar, and its object is the drawing off, or discharge of
the charcoal automatically from the cooling pipes, after it has been reburnt or
revivified and cooled, by a regular and easy motion, which will obviate any grinding
or trituration of the charcoal, and be perfectly adjustable to the varying burning
capacities of the different pipes or retorts in which the charcoal is reburnt.
Described in detail,-Fig. 1 represents a plan and Fig. 2, a longitudinal elevation,
partly sectional, of a charcoal kiln, in which A, are the cast iron pipes or retorts,
surrounded by the brick walls B, of the kiln, and having a furnace C, between the
two sets of pipes, A, the hot gases from which pass around the pipes, and through
the ports D, into the flue beams E, which lead to the main flue at back of kiln.
F, are the cooling pipes, of light iron or steel, G the automatic discharge
referred to, and H, the receiver, in which the re-burnt charcoal is stored, and from
which it is distributed by bands I as required. J is the furnace ashpit, K are the
six columns supporting kiln.
In operation, the charcoal is spread on top of kiln, and passes down through
pipes A, where impurities are forced off by the heat, thence through the cooling
pipes F, from which it is drawn off by automatic discharge G, and falls into
receiver H.
Fig. 3 is an end elevation, partly sectional, and Fig. 4 a side elevation, to an
enlarged scale, cf automatic discharge G, in which L is a hopper, divided trans-
versely in compartments, into which the cooling pipes F discharge, and from which
the charcoal is withdrawn by the revolution of the roller M, in a layer, whose
thickness is regulated by the distance from the surface of the roller of the edge of
the escape-plates N, as adjusted to the burning capacity of each pipe by the
studs O, and to their collective burning capacity by traversing the obliquely-slotted
bar P.
The roller M, fixed on spindle R, is driven through screw wheel Q, engageable
by hand nut S, by screws T, on line shaft W.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1st. In an automatic discharge of the nature described for charcoal kilns, a
hopper divided transversely into compartments, marked L, Figs. 3 and 4, on
accompanying drawings.
2nd. A separate adjustable escape-plate for each compartment, of aforesaid
hopper, with moveable stud, marked respectively N and O, Figs. 3 and 4 on
accompanying drawings.
3rd. An obliquely slotted bar, by traversing which, the escape-plates N may
be raised or lowered collectively, marked P. Figs. 3 and 4 on accompanying
drawings.
ALEXANDER ORKNEY.