IMPROVEMENTS IN APPARATUS FOR SUPPLYING AIR TO THE FURNACES OF STEAM BOILERS, OR TO OTHER FURNACES
Year: 1884

page_text: I, JAMES GEORGE GALLEY, of Upton Park, in the County of Essex, Engineer,
do hereby declare the nature of my Invention for "IMPROVEMENTS IN APPARATUS
FOR SUPPLYING AIR TO THE FURNACES OF STEAM BOILERS, OR TO OTHER
FURNACES" and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
My Invention has for its object a novel method of constructing and arranging
apparatus for the purpose of supplying air to the furnaces of boilers used for the
generation of steam, or to furnaces used for other purposes, so that the combustion
of the coal or other fuel used is promoted and perfected and smoke is prevented,
whilst economy of fuel is effected and regulation of the fire is easy.
My Invention may be applied to any kind of furnace, but in the accompanying
Drawing it is shewn in use in connection with an ordinary steam boiler having a
fireplace in an internal flue. Figure 1 is a longitudinal section and Figure 2 a front
view of a boiler so fitted. a is the cylindrical boiler having an internal flus b,
containing a firegrate c consisting of firebars 6 of any convenient kind, and a
fire door d.
In front of the boiler below the door frame or the dead plate is fixed a transverse
pipe or chamber f of considerable diameter, one or both ends of which are open
for the admission of air, and through this chamber passes and is fixed a pipe i into
which steam can be admitted from the boiler and regulated by a cock or valve
at k. The pipe i in the chamber fis provided with a sufficient number of jets at h
(the number and size of which may be varied according to the size of the firegrate
and the circumstances under which the apparatus is used), through which jets of
steam are directed forward and preferably upward as shewn through the centres of
corresponding air nozzles or tubes g fixed or formed upon the front of the
chamber f. By the arrangement described and shewn, when jets of steam issue
from the pipe i at h they induce and carry with them through the nozzles g a large
quantity of air which is directed upward through the firebars 6 into the fire.
The lower part of the front of the flue b below the chamber f may be closed by
a door if desired, so that the whole of the air required for combustion is supplied
through the nozzles g, the latter being so proportioned in number and size that
[Price 4d1

page_text: sufficient air can in this way be supplied through them; whilst the speed of
combustion of the fuel and the regulation of the supply of air can be perfectly
adjusted by varying the quantity of steam admitted by means of the valve at k.
Instead of air being admitted to the chamber f, through its ends, as shewn at Z
in Figures 1 and 2, the ends of the latter may be closed, and the air admitted
through a series of openings in its front opposite the nozzles, as shewn at lin
Figures 3 and 4.
Or, instead of a chamber provided with openings, I sometimes prefer to use a
simple frame, as shewn at f in Figure 5, into which are fixed the air nozzles g,
the steam pipe i and jets at h being arranged behind them and being provided with
a jet opposite to each nozzle by which a current of air is induced and injected into
the fireplace.
In this arrangement the air has free access to the front of the
nozzles.
Instead of one injecting apparatus only as shewn, a second may be arranged
under the crossbearer at c in Figure 1, or three or more may be used.
Apparatus for the purpose of inducing and injecting currents of air into furnaces
according to my Invention in the way described and shewn may be applied to the
fireplaces of all kinds of furnaces, as for instance where they are arranged below
instead of inside the boiler, or where fireboxes are used. Or it may be applied to
furnaces used for other purposes as well as for heating boilers, the supply of steam
to the pipe in such case being obtained from a separate source.
I do not confine myself to the precise form, arrangement, and relative
proportions of parts, of the apparatus as herein before described and shewn, which
may be varied to suit varying circumstances, but having now particularly described
and ascertained the nature of my said Invention and in what manner the same
is to be performed, I declare that what I claim.is,-the combination of the steam
pipe and jets h and air injection nozzles g, for the purpose of supplying air to
furnaces, arranged and operating substantially as described and shewn in the
Drawing.
th
C
11001