Improvements in and relating to Smoke Consuming Boiler Furnaces and in the Boilers used in connection therewith.
Year: 1893

page_text: Date of Application, 2nd June, 1893-Accepted, 22nd July, 1893
COMPLETE SPECIFICATION.
Improvements in and relating to Smoke Consuming Boiler Furnaces
and in the Boilers used in connection therewith.
I, RUDOLF MÜLLER, of Dorotheenstrasse 66, Hamburg, in the Empire of
Germany, Engineer, 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 relates to boiler furnaces and its special purpose is to afford
complete combustion of the fuel and to remove or prevent smoke by burning
it away.
The improved boiler furnace substantially consists of a double wall or mantle
surrounding a hollow space, the latter being closed below by a grate, on which the
fuel rests and provided above with a cooling jacket, the latter serving to prevent
the radiation of the heat developed.
The interval between the double walls directly communicates with the interior
of the boiler, and the outlet opening through which the flames and gases pass
to the flues or flame-tube or tubes of the boiler, is immediately above the aforesaid
grate.
The combustion takes place in such a way, that the air entering above passes
down through the fuel, which latter is also supplied from above, into the combustion
zone, which lies directly in front of the outlet opening. The grate only serves as
a cinder-fall, and air is not supplied through the latter or at least in a very
insignificant degree.
The annexed drawings show four modifications of the present invention
respectively in the Figures 1 to 3, 4 to 6, 7 to 9 and 10 to 12.
Fig. 1 is a longitudinal section through the furnace and the front portion of the
boiler to which it is fitted.
Fig. 2 is a front view of Fig. 1, partially in section on the line y y Fig. 1.
Fig. 3 is a plan view in section on the line vv Fig. 2.
Fig. 4 shows a longitudinal sectional view through the furnace and the front end
of a locomotive boiler to which it is fitted.
Fig. 5 is front view in section on the line w to Fig. 4.
Fig. 6 is plan in section on the line u u Fig. 4.
-Fig. 7 represents a longitudinal section through the furnace and the front end of
a plain cylindrical or of a saddle boiler.
Fig. 8 shows a front view in section on the line n n Fig. 7.
Fig. 9 is a plan in section on the line m m Fig. 7.
Fig. 10 is longitudinal section through the fore-end of a boiler with internal
firing.
Fig. 11 is a cross section on the line k k of Fig. 10 and
Fig. 12 is a cross section on the linear Fig. 10.
K in all cases represents the main boiler and A a hollow space which laterally
or in front is surrounded by a double jacket M. The interval between the walls of
the double jacket M directly communicates with the interior of the main boiler K,
so that the water in the boiler through diaphragms i communicates with and fills
both mantles. The hollow space A is closed below by a grate D beneath which is
the ash-pit enclosed on all sides by walls. On the front side below the double
jacket an open space is left, provided with a cleaning door E and the double
jacketed space A is closed above with a double-walled cover z, which possesses air
inlet openings p and t, this cover serves at the same time to prevent the radiation of
heat. Through the openings p air enters the fuel lying upon the grate and through

page_text: openings air circulates in the cover; the latter serves for keeping the cover
sufficiently cool. s is an orifice in the cover serving for introducing the fuel.
At the rear end of the hollow space A, close above the grate D, the outlet
opening F for the fire gases is arranged, the fuel being intended to be heaped in
such a manner upon the grating, that it covers completely this opening F, so that
no cold air is allowed to pass to the flues of the boiler, but such air must first pass
through the fuel, before it arrives at the gas developing zone, the latter lying at the
opening F.
In Figs 1 to 3 where a furnace arrangement for a boiler with two tubes is
shown the hollow space A is divided in the middle by a cross wall, being part
of the double jacket M, communicating through orifice i with the boiler K. In
Figs. 4 to 6 and Figs. 7 to 9 the same letters represent similar parts, only instead
of the flame-tube-boiler K (Figs. 1 to 3) in Figs. 6 to 8 a locomotive boiler K
and in Figs. 7 to 9 a boiler K with firing from beneath is illustrated.
In the modification shown in Figs. 10 to 12, the double jacket M also leads
underneath the grate D and as seen from the front in Figs. 11 and 12 is of
cylindrical cross section with an equal diameter to that of the boiler. The
connection of the double jacket M with the boiler is presumed to be effected about
on the cross section line so that part of the whole lying on the right hand side
of the line xx in Fig. 10 forms the double jacket M surrounding the hollow space A
and that part to the left of the said line constitutes the flame tube boiler K. The
cross section of the boiler K consequently coincides with the cross section of the
double jacket M on the plane of connection. The upper surface of the double
jacket M may either as shown in Figs. 1 to 9 lie beneath the water level within the
main boiler, so that no steam space exists within the double jacket or the upper
surface can lie higher than the water level within the boiler so that a steam space
originates. Figs. 10 to 12 show the latter modification in which also the cap z
shown in Figs. 1 to 9 may be omitted.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
1. An improved boiler furnace constituted by a double jacket M surrounding a
hollow space A and directly connected to and communicating with the interior
space of the boiler so that the water in the boiler communicates with that within
the interval between the walls of the double jacket, said hollow space A being
closed below by a grating D on which the fuel rests and above by a cap z serving
to prevent the radiation of heat air inlet holes being provided in the said cap and a
flame outlet hole F immediately above the grate D and intended to be covered by
the fuel substantially as described.
2. The modification whereby the double jacket assumes the same interior and
exterior cross sectional form as the boiler substantially as described with reference
to Figs. 10 to 12.
Dated the 17
T
R. HADDAN,
Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, Agent for Applicant.