Improvements in Steam Boiler Furnaces and Settings.
Year: 1889

page_text: Date of Application, 16th May, 1889
Complete Specification Left, 30th Oct., 1889-Accepted, 28th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Steam Boiler Furnaces and Settings.
A communication from LEOPOLD JOSEF, of Karlgasse 4, Vienna, in the Empire
of Austria.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., do hereby declare the nature of this invention to be as follows:-
The present invention relates to improvements in furnaces for boilers especially
those being provided with branch or auxiliary hoilers arranged underneath the
principal one and its object is a perfect consumption of smoke and consequent saving
in fuel.
The improvements consist in ;-
1. The arrangement of adjustable fire-doors.
2. A combined fire-grate.
3. An apparatus for the consumption of the smoke.
1. An improved setting of the boiler in the masonry or brick-work.
The adjustable fire doors slide up and down in grooves and are provided with
counterweights the doors are of conical or inclined section at their lower edge which
The
fits into a corresponding groove, thus preventing the entrance of cold air.
fire grate consists of two series of rods which cross each other and if the fire grate is
not longer than one metre it consists of one compartment, but if longer than one metre
it consists of two or more compartments. With this arrangement of fire grate it is
possible to burn the smallest fuel such as nut coal or the like. So as to conduct the
whole of the heat without loss to the boiler the furnace is lined with chamotte or
other refractory material. Underneath the principal firegrate is arranged, an adjustable
grate provided with a counterweight which grate is lifted when the fire is being
trimmed.
The apparatus for the consumption of the smoke is so arranged that the air entering
through channels above the fire-doors is heated to such an extent that when it at last
enters the apparatus it ignites the smoke passing over the apparatus. The air enters
above the fire doors through the channels and passes to right and left until it enters
a hollow bridge upon leaving which it ignites the smoke which it encounters.
Up to the present it has been impossible to prevent partly unburnt coal from being
carried away with the ashes when the fire is raked and trimmed thus wasting a
quantity of fuel. This waste is prevented in the present, construction by the
adjustable lower grate which is lifted when the fire is being raked and trimmed
the small partly burnt pieces of coal fall into this lower grate but do not pass through
like the ashes as the openings of this lower grate are only about half the size of
those of the upper or principal grate. A door in front of the fire doors and covering
a grating in the floor is now opened so as to allow air to enter into the ash pit and
to the lower grate for the purpose of consuming the coal on the lower grate. This
air may be conducted through conduits into the smoke consuming bridge to mix
here with the air coming from the channels above the fire doors. By means of the
above arrangement a large portion of fuel is saved.
The smoke consuming or air heating apparatus or bridge consists of a series of
vertical parallel partitions the spaces between which are again divided by a series of
vertical parallel partitions at right angles to the former. The air is thus better
distributed and has to traverse a much longer, way thus becoming much more
heated.
The flues in the masonry are arranged in such a manner that the products of
combustion or heating gases pass first underneath the principal boiler and then pass
the sides of the auxiliary boilers which are arranged; underneath the principal boiler

page_text: and connected therewith. The heating gases pass the sides of auxiliary boilers
successively from the back to the front and vice versa before passing into the
chimney.
The oiler is preferably hung from cross beams placed on the top of the masonry
thus preventing the boiler from settling on one side.
The above described improvements can be employed with other kinds of boilers
or furnaces with corresponding modifications.
Dated this 16th day of May 1889
COMPLETE SPECIFICATION.
Improvements in Steam Boiler Furnaces and Settings.
A communication from LEOPOLD JOSEF, of Abt-Karlgasse 4, Währing, Vienna, in
the Empire of Austria.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., 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:-
The present invention relates to improvements in the furnaces or fire-boxes of
boilers particularly in boilers constructed with supplemental steam generating
chambers by which a complete consumption of smoke is aimed at and thereby
fuel saved.
These improvements consist in ;-
1. The arrangement of adjustable furnace-doors.
2. A combined fire-grate.
3. A smoke-consuming apparatus.
4. An improved setting of the boiler in the masonry or brick-work.
In the accompanying drawing
Fig. 1 represents a longitudinal section of the entire steam-boiler apparatus.
Figs. 2, 3, 4, 5, 6 and 7 are transverse sections and Fig. 8 a front elevation of the
same. Figs. 9, 10 and 11 are horizontal sections of Figure 1. Fig. 12 shows the
combined grate M, on an enlarged scale in detail. The following letters designate
the following in these figures ;-
A, the boiler.
B B', the supplemental boilers.
CC, the fire-doors.
D, the fire-chamber.
E, the fire-bridge.
G, the air-channels.
H, the smoke-channels or flues.
I, the smoke-consuming apparatus.
KK' K³, the regulating weights.
M, the grate proper.
N, the adjustable grate.
O, the grating for air to pass through.
P, the adjustable plate to regulate the supply of air thus admitted.
Q, the ash-pit.
R, the soot or flue doors.
S, the slides or dampers.
Si, the fire-inlet to the chimney.
T, the air channel.
-U, the flues extending from the back to the front of the boiler, whilst
designate the opposite fire-passages.
VV, the channels in the adjustable grate.

page_text: The adjustable fire-doors CC slide up and down in grooves and are concealed
when drawn up in the casing of the hot-plate, these doors are provided with counter
weights, (Fig. 1) which are about one-tenth lighter than the fire-doors to which they
are connected, these are as above-mentioned, moved in grooves and have a conical
inclined or bevelled edge fitting into an inclined groove in order to prevent the
entrance of cold air which is of great importance in the apparatus. The combined
grate is made of two series of bars m and m' which cross one another and which
grate if not longer than one metre may consist of one compartment or if longer than
one metre of one two or more compartments as may be seen from the detail drawing
Fig. 12, (horizontal section and sections a b, and e d) whilst transversely it is
preferably made up of two smaller parts or grates. With this arrangement it is
possible to make use of the smallest fuel, such as nut-coal, coal-dust and the like.
and to prevent the formation of clinker. In order to conduct the undiminished heat
to the boiler, the pit-shaped fire-chamber is lined with chamotte or other refractory
material. Beneath the principal grate M. is an adjustable grate N (figs. 1, 2 and 3)
which is balanced by means of a counter-weight K₁ which grate as soon as the fire
is cleared begins to operate, whilst it is raised by drawing out the rod n by means
of a suitable handle n¹ (figs. 1 and 8).
The smoke consuming apparatus is so arranged that the air which having passed
over the fire-doors and has entered the channels G may be heated to such a degree
that as soon as it arrives at the required part F of the apparatus it will ignite the
smoke passing over the said apparatus. The cold air thus admitted over the fire-
doors CC passes into the boiler apparatus and travels right and left (see fig. 10) and
eventually through the channels in the supports m² of the grate M (fig. 3) and enters
the apparatus F, on leaving which it ignites the smoke streaming towards F (fig. 1).
Hitherto it has been impossible to prevent cinders and partly unburnt coal from
being taken away with the ashes when the fire is raked and trimmed and thus fuel
was needlessly wasted. This is prevented according to the present invention by the
adjustable grate N; if this be raised as before described then the plate N¹ is turned
as is shown by dotted lines in fig. 1.
The impurities which are removed from the fire-chamber, together with the
cinders etc., will fall upon the said adjustable plate N¹, from the latter on the front
part of the adjustable grate N and will be entirely consumed there; whilst the
adjustable grate N is lowered, and the adjustable plate turned back and the grating O
for admitting air through the ash-pit is opened by the door P.
When this said grating O is open the air streams through it into the ash-pit. Q
and assists the total consumption of the cinders and the small pieces of coal, and
becoming heated here, passes through V-V into the smoke consuming bridge J.
and combines with the air passing through the before mentioned channels G. The
consumption of the small pieces of coal is complete, since the latter do not fall
through the adjustable grate N and therefore absolutely cannot escape burning, as
the said adjustable grate N has openings only half the size of those in the grate M
above it.
The admission of the air which was heated in the adjustable grate N into the
apparatus J can be effected by the damper contrivance Wi WW3 (fig. 1). By the
employment of the before-mentioned improvements in the system of boilers already
describe a large proportion of fuel can be saved; the whole of the smoke will be
burned at one part of the apparatus over the fire-bridge E. As the smoke from the
more powerful flames is removed it is directed to a larger space as the cross
section E F (fig. 4) shows by the shape of the smoke channels H H. The smoke
consuming or air-heating apparatus F is seen in figure 1 in longitudinal section, in
fig. 10 in horizontal section and in fig. 4 in cross section. It is constructed of several
vertical walls running parallel to one another and the spaces between which are
again divided across by vertical partitions into a number of chambers through
which the air streams in the direction of the arrows. The air is thus better
distributed as well as compelled to travel over a longer distance, and in this manner
becomes very highly heated.

page_text: The improved boiler setting is so devised that after the flame has spread over the
boiler A it impinges on the boiler B¹ Fig. 7, which is situated below; it travels along
the sides of both boilers in the channels T (section P Q Fig. 10) one after the other
from the rear end towards the front and vice versa and enters the chimney at S'.
In figures 5, 6 and 7 the front flues are distinguished by U-U and back ones
by from which it follows that the boiler will be impinged upon four times by
the fire, an advantage which until now has never been attained in such a simple way.
In order to obtain a position as independent of the wall as possible for the boiler A
(instead of using hooks) the boiler is suspended from the cross beams A¹ (Figs. 1, 3
and 4) by which are prevented the bending of the boiler and other consequences
which often occur with the existing boiler settings through the wall pressing against
the boiler. The before described improvements may advantageously be applied to
various kinds of boilers or furnaces with corresponding unimportant modifications.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to mo
by my foreign correspondent I declare that what I claim is ;-
1. In smoke consuming apparatus an adjustable balanced grate such as N which
may be moved upon a pivot by a weight K¹ with its ash-grate N³ and air
channels VV in combination with a swinging plate N₁ for catching coals and the
draught apparatus n n' and plate P which admits air to the grates M N substantially
as herein described and illustrated in the accompanying drawings.
2. The apparatus F with channels such as i for heating and conducting air to the
smoke in combination with the air channels G and V in the grates M and N and the
smoke channels H substantially as herein described and illustrated in the accompanying
drawings.
3. In smoke consuming apparatus fire doors such as CC balanced by weights K
and which are guided in grooves in the furnace front and effect the hermetical closing
of the fire opening by means of their bevilled under edges substantially as herein
described and illustrated in the accompanying drawings.
4. In smoke consuming apparatus a grate such as M composed of separate and
combined compartments or sections each constructed with longitudinal bars m and
bars which cross these in combination with the frame in formed with air
channels G substantially as herein described and illustrated in the accompanying
drawings.
5. The improved boiler setting consisting in the particular disposition or
arrangement of the smoke-channels H fire passages U₁-U and u² and the
suspension of the boiler from cross beams such as A resting on the wall substantially
as herein described and illustrated in the accompanying drawings.
Dated this 20th dose of Ostaban 1880
W. P. THOMPSON & BOULT,
Agents for the Applicant.