Improvements in Boilers for Boiling or Chemically Treating Fibrous Materials.
Year: 1893

page_text: Date of Application, 27th Mar., 1593-Accepted, 6th May, 1893
COMPLETE SPECIFICATION.
Improvements in Boilers for Boiling or Chemically Treating Fibrous
Materials.
I, GEORGE SINCLAIR, of Albion Boiler Works, Leith, in the County of
Mid Lothian, North Britain, Boiler Maker, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, that is to say :-
My present invention relates to boilers of a kind described in my Patent
Specification No. 2035 of 1880, and used for boiling or chemically treating rags,
esparto, and other librous paper-making materials, or textile materials and
fabrics.
And in order that my present invention and the manner of performing the same
may be properly and most readily understood, I will at once proceed to particularly
describe my various improvements with the aid of an explanatory sheet of drawings
which is hereunto appended.
Figure, 1, of the accompanying drawings is a vertical section and Figure, 2, a
horizontal section showing one modification of my improved boiler. Figure, 3, is
a vertical section showing a second modification.
In these drawings the same reference letters are used to mark the same or like
parts wherever they are repeated.
As shown in Figures, 1, and, 2, a boiler, A, of the kind to which some of my
improvements are applied is of a vertical cylindrical form with convex top, B, and
convex bottom, C, and with an inlet, D, for steam at the bottom.
There is a space
between bottom, C, and a horizontal plate or diaphragm, E; and a perforated
diaphragm, F, is placed at a small distance above the plate, E. The goods to be
operated upon rest on the perforated diaphragm, F, and the liquor acting on the
goods drains through the perforated diaphragm and descends through dipping
pipes, G, fixed to the plate, E. These dipping pipes, G, are arranged in a circle
round a central opening in the plate, E, which opening is to give access for cleaning
but is closed by a disk, H, when the apparatus is working. In diametrically
opposite positions in the bottom space (or it might be in three or more equidistant
positions) shoe-like boxes, J, are fixed, these boxes being made with dipping
nozzles, K, at their ends nearer the middle of the boiler, and with openings, L,
at their outer and upper ends communicating with vertical vomiting pipes or
passages, M, extending up the sides of the boiler, A. These passages, M,
extend up to an upper perforated diaphragm, N, and the action of the steam
entering the bottom space is to press on the liquor which drains into that space and
force it up the vomiting passages, M, so that it circulates repeatedly through the
materials which are being operated on. The vomiting passages, M, are preferably
formed by flanged concave or channel-shaped plates fixed by screws to the boiler
shell; and easily detachable for cleaning purposes, the upper perforated
diaphragm, N, being also held in its place, by bolts, P, and screws, Q, and being
made in segments to permit of its easy removal. The shoe-like boxes, J, at the
bottom are made with cleaning holes which are stopped by screw plugs, R, during
working. Instead of such shoe-like boxes, J, short pipe lengths may be partly
flattened and partly bended so as to have dipping inner inlets (K) and upper outer
outlets, L.
In the second modification (Figure 3) a single central vomiting pipe, S, is sub-
stituted for the two or more vomiting passages, (M, Figures 1, and 2) at the sides.
This central pipe, S, has formed or fixed on it a flange, T, by means of which it is
fixed in a recessed plate, U, bolted to the horizontal plate, E, covering the bottom
space, and the lower perforated diaphragm, F, is placed very near this plate, E.

page_text: The plate, E, is fitted with dipping pipes, V, the lower ends of which are made
with projecting segments, W, which rest on the bottom, C, of the boiler, so that
the dipping pipes, V, serve as supports to the plate, E, and to the vomiting pipe, S,
resting thereon.
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 :-
1. In a boiler for boiling or chemically treating fibrous materials, forming a
central cleaning opening, in the inner bottom plate, which can be closed by a disk,
providing in the space below that plate two or more shoe-like boxes or short pipe
lengths made with dipping nozzles and with openings communicating with lateral
vertical vomiting passages made easily detachable; and making the upper perforated
diaphragm also easily removable, all substantially as and for the purposes herein-
before described and shown in Figures 1, and 2, of the accompanying drawings.
2. In a boiler for boiling or chemically treating fibrous materials, securing a
central vomiting pipe with a flange near its bottom end in a recessed plate bolted
to the horizontal inner bottom plate which plate is fitted with dipping pipes the
lower ends of which are made with projecting segments resting on the bottom of
the boiler, all substantially as and for the purposes hereinbefore described and
shown in Figure, 3, of the accompanying drawings.
Dated this Twenty-fifth day of March 1893.
EDMUND HUNT,
Applicant's Agent.