Improved Apparatus for Air-feed and Smoke Combustion in Boller-furnaces.
Year: 1895

page_text: Date of Application, 4th Mar., 1895-Accepted, 13th Apr., 1895
COMPLETE SPECIFICATION.
Improved Apparatus for Air-feed and Smoke Combustion in
Boller-furnaces.
I JACOB ROBERT MÜLLER-LANDSMANN of Lotzwyl in the Republic of
Switzerland, Manufacturer, 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 :-
This invention in question relates to apparatus for boiler-furnaces by which a
complete combustion of the fuel and therefore a nearly complete combustion of the
smoke can be obtained and which can easily be attached to any boiler furnace,
especially to locomotives.
In the annexed drawing
Fig. 1 is a longitudinal section and Fig. 2 a cross section of this apparatus as
fitted to existing locomotive boiler-furnaces.
Fig. 3 is a longitudinal section, Fig. 4 a cross section and Fig. 5 a horizontal
section, showing another form intended also for boilers of locomotives, which would
principally be employed for new work.
In the fire box a two hollow chambers 6 and 6' are made, the interiors of which
are connected with each other not only by pipes e but also by the hollow grate
bars e e perforated at their sides, as shown at d d.
The front and the two sides of the box &, which are elongated in an upward
direction, above the top of the grate bars e e and which at the upper end can be
formed into the so-called fire bridge, form with the plate, a channel which com-
municates with the pipes g, runuing like the flues, through the boiler and opening
into a common pipe G, which runs through the smoke box into the air. The end
of the pipe G, which runs outside the smoke box, should be enlarged, so that the
air can easily enter; it is also preferable to regulate the entrance of air by means
of dampers or valves, attached to the pipe G. As the doors of the ashbox are
intended to be kept closed, the air, necessary for the combustion of the fuel on the
grate bars, is compelled to run as indicated by the arrows in Figs. 1 and 2. By
this operation the air is warmed at first, as it passes through the pipes g by the
water in the boiler. Thence it goes into the hollow spaces 6 and 6 and thence into
the hollow bars e e, which have become red hot by the heat of the fire, and from
there in a highly heated state it passes through the openings d d between the grate
bars ee and to the fuel on the grate, cousequently this fuel on the grate is consumed
at a high temperature and without forming smoke.
In the apparatus shown in Figs. 3 to 5 the fire box a is divided into two parts by
a vertical partition wall each part of which is equally equipped, as described in the
above instance. The flues hare, for simplicity's sake, represented by one single
pipe hand, the air pipes g by one single pipe g¹² and g³, but any number of either
may be used.
In the smoke box the pipes or systems of pipes h¹ and h³, also g¹ and gª enter
into the common pipes H and H and G' and G³ respectively.
Provision has been made, that the gas formed on the grate I can enter through
the pipe ¹ into the air pipe g² for the grate II, and from there, mixed with fresh
air, to the grate II. Also the gas formed on the grate II can enter through the
pipe into the air pipe g' and from there to the grate I so that a part of the .
gases go several times the same way, by which a complete combustion thereof is
obtained.

page_text: In order to obtain the necessary draught, especially in lighting fresh coal, dampers
and slide valves are attached to the pipes H and H', by which the gas formed in
lighting and putting coal, can find its way direct to the smoke stack. Similar
dampers and valves i can be used for leading the incombustible gas into the smoke
stack.
By means of "exhausters" and injectors the draught in the pipes h¹ and h³ as
well as in the pipes g¹ and g³ can be increased as and if desired.
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. The improved apparatus for boiler furnaces comprising the air pipes o, which
run through the water or steam space of the boiler and the two hollow spaces 61 and h,
whence the air is led through the hollow fire bars e e in a much heated condition,
through openings d d on the sides of the bars, between the the bars to the fuel
thereon; substantially as described and illustrated.
2. The combination in duplicate of the apparatus herein described with two
grates separated by a partition wall, wherein the air pipes g¹ and g³ can be fed from
the flues h³ h¹ substantially as described and shown in the drawings.
Dated this 4th day of March 1895.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.