Improvements in Apparatus for Collecting and Withdrawing Solid Particles from the Fire Gases from Furnaces of Boilers.
Year: 1893

page_text: Date of Application, 12th May, 1893
Complete Specification Left, 8th Feb., 1894-Accepted, 14th Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Collecting and Withdrawing Solid
Particles from the Fire Gases from Furnaces of Boilers.
We, ARCHIBALD DENNY, Leven Ship Yard, Dumbarton, in the County of
Dumbarton, North Britain, Shipbuilder, and GEORGE RITCHIE BRACE, of the
same, place, Naval Architect, do hereby declare the nature of this invention to be
as follows, that is to say :-
Our said invention has for its object the construction of apparatus for collecting
and withdrawing solid particles from the fire gases from furnaces of boilers, so that
the fire gases before they issue from the funnel or chimney will be freed from the
soot and other objectionable matter which usually settles down in the neighbourhood
of the funnel or chimney.
Our invention may be applied in connection with furnaces having either natural
or assisted draught and in carrying it out we fix a casing, in any suitable position
in the uptake leading to the funnel or chimney. This casing is, by preference,
circular in horizontal section its lower end being conical and it is fitted internally
with a number of vanes arranged spirally, a plate with a number of openings being
also fitted at or near the bottom of the casing to which is attached a receiver with
a door at its lower end. The fire gases from the furnaces enter the casing through
openings at or near the top of the casing, these openings being arranged so as to
impart a rotatory motion to the fire gases and the solid particles are separated out
and guided down by the vanes through the openings in the plate at the bottom of
the casing into the receiver from which they can be withdrawn from time to time.
The fire gases thus freed from the soot and other objectionable matter pass up the
funnel or chimney which is connected with the top of the casing.
Dated this Twelfth day of May 1893.
EDMUND HUNT,
Applicants' Agent.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Collecting and Withdrawing Solid
Particles from the Fire Gases from Furnaces of Boilers.
We, ARCHIBALD DENNY, Leven Ship Yard, Dumbarton, in the County of
Dumbarton, North Britain, Shipbuilder, and GEORGE RITCHIE BRACE, of the
same place, Naval Architect, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement, that is to say :-
Our said invention has for its object the construction of apparatus for collecting
and withdrawing solid particles from the fire gases from furnaces of boilers, so that
the fire gases before they issue from the funnel or chimney will be freed from the
soot and other objectionable matter which usually settles down in the neighbourhood
of the funnel or chimney.
Our invention may be applied in connection with furnaces having either natural
or assisted draught and in carrying it out we fix a casing, in any suitable position
in the uptake leading to the funnel or chimney. This casing is fitted internally
with a number of vanes arranged spirally, and with a receiver at its bottom part.
The fire gases from the furnaces enter the casing through openings arranged to

page_text: impart a rotatory motion to them, thereby separating out the solid particles which
are then guided down by the vanes to the receiver from which they can be
withdrawn from time to time..
And in order that our said invention and the manner of performing the same
may be properly understood we hereunto append four sheets of explanatory
drawings, to be hereinafter referred to, and showing a few modifications of our
improved apparatus for collecting and withdrawing solid particles from the fire
gases from furnaces of boilers.
Figures, 1, and, 2, on Sheets, 1, and, 2, of the drawings are diagrams showing
vertical sections, at right angles to each other, of the apparatus as applied to tivo
single-ended marine boilers facing each other.
::
Figure, 3, on Sheet, 3, is a diagram as in horizontal section of the same.
Figure, 4, is a diagrammic front elevation of the apparatus as applied to two
single ended marine boilers alongside of each other.
Figure, 5, on Sheet, 4, is a diagrammic front elevation of the apparatus as applied.
to three single-ended marine boilers alongside of each other.
="
Figures, 6, and, 7, are diagrammic elevations as at right angles to each other of
the apparatus as applied to a double-ended marine boiler.
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, to, 5, of the drawings we fix a casing, A, in the lower
part of the uptake, B, leading to the funnel, C. This casing, A, is, by preference
circular in horizontal section, its lower part being conical, and it is fitted internally
with a number of vanes, D, arranged spirally, and consisting of comparatively
narrow plates projecting from the sides of the casing to which they are fixed by
angle irons. A plate with a number of openings may also if desired be fitted at or
near the bottom of the casing, A, to which latter there is attached a receiver, E,
with a door, F, at its lower end. The fire gases from the furnaces enter. the
casing, A, through openings, G, (shown only in Figures, 1, 2, and, 3), at or bear
the top of the casing, A, these openings being arranged so that the fire gases enter
tangentially and acquire a rotatory motion. The solid particles. are separated out
by the centrifugal action due to the rotatory motion, and are guided down by the
vanes, D, into the receiver, E, from which they can be withdrawn from time to time.
The fire gases thus freed from the soot and other objectionable matter pass up the
funnel; C, which is connected with the top of the casing, A.
In Figures, 6, and, 7, on Sheet, 4, the receiver, E, is shown as extending over
and down one side of the boiler, instead of being brought vertically downwards
from the bottom of the casing, A, as in the other modifications. One single-ended
boiler, may, of course, be provided with the apparatus, the parts thereof being
suitably proportioned.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
In connection with steam boilers, fitting improved apparatus for collecting and
withdrawing solid particles from the fire gases, the apparatus comprising a circular
casing fixed in or attached to the uptake the said casing having openings in it for
the entrance of the fire gases in tangential directions and fitted internally with
spiral vanes for leading the separated particles to a receiver, substantially as herein-
before described.
Dated this Seventh day of February 1894.
EDMUND HUNT,
Applicants' Agent.