Improvements in Steam Boiler and other Furnaces.
Year: 1890

page_text: Date of Application, 26th Mar., 1890
Complete Specification Left. 23rd Dec., 1890-Accepted, 7th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Boiler and other Furnaces.
I, JOHANN GASTEIGER, of 3, Renniweg, Vienna, in the Empire of Austria,
Engineer, do hereby declare the nature of this invention to be as follows:-
According to this invention I construct a steam boiler or other furnace in such
manner that the coal used is distilled and the gas produced caused to pass over
a coke fire up through which steam is made to rise and to be consumed together with
the gas which rises up from the coke.
The coal to be distilled is either placed on to a plate situated between the front
door and the fire bars or into chambers at the two sides of the fire.
In Figures 1 and 2 I have shewn a steam boiler furnace with distilling chambers
at the two sides.
Figure 1 is a longitudinal section and Figure 2 a transverse section.
In Figures 3 and 4 I have shewn a steam boiler furnace with a plate at the front
on to which the coal to be distilled is to be placed.
Figure 3 is a longitudinal section and Figure 4 a front elevation with one half in
section.
In Figures 1 and 2 a are the distilling chambers at the sides of the fire. bare
the fire bars on which a coke fire is to be maintained. c is the ash pit.
d are pipes for conducting air to the bottom of the distilling chambers. d' are
passages by which air can pass to the back of the fire. d are passages for allowing
air to pass to the ash pit. e are pipes by which gases are led from the top of the
distilling chambers and discharged through outlets e' into the fire chamber above
the glowing coke on the fire bars. a' are doors by which coal can be supplied
into the distilling chambers. a² are doors by which when coal has been distilled
in these chambers the resulting coke can be discharged on to the fire bars. h is the
steam boiler which is shown as being of the ordinary locomotive type. g is a pipe
by which steam can be conveyed from the boiler to the ash pit below the fire
bars. is a damper by which the passing away of the burnt gases from the
furnace can be controlled. In Figures 3 and 4 A is the plate at the front of the
furnace. A is a door at the front. B are the fire bars. C is the ash pit.
D are pipes for introducing heated air to the ash pit. D' are pipes for admitting
heated air to the fire chamber at the back above the fire bars. H is the steam
boiler. G is a pipe for admitting steam from the boiler to the ash pit. F is a
damper for controlling the passing away of the burnt gases.
In starting the furnace a necessary quantity of coke is placed in a glowing
condition on to the fire bars of the furnace. At the same time coal is placed into
the distilling chambers a Figures 1 and 2 or on to the plate A Figures 3 and 4. As
the coal is distilled and the gases are driven out they must pass over the glowing
coke and be there consumed. The steam which is conveyed from the boiler through
the pipe g to below the fire bars not only keeps the bars cool but also as it rises up
through the glowing layer of coal is converted into combustible gases which in
the process of combustion develop an unusually large degree of heat. In order to
ensure the combustion of any gas which may not have been entirely consumed over
the glowing layer of coke intensely heated atmospheric air is introduced at the back
of the fire chamber through the air passages d' in Figures 1 and 2 and D¹ in
Figures 3 and 4. The pipes by which air is admitted to the furnace must be so
arranged that the air requisite for the burning process shall become intensely heated
and it is very important that no air shall enter the furnace except through these
heating pipes:
Furnaces constructed to act in the manner above described are of very great value

page_text: because through the complete combustion obtained in them a heat unusually free
from smoke is produced which can be conveyed into chambers or kilns in which
bricks or pottery or various other things which require to be exposed to a very high
temperature are placed, boilers also can be intensely heated.
The furnaces can be used not only for fixed boilers and furnaces but also
locomotive boilers and in particular for ships boiler furnaces in which an
enormous saving of coal and other fuel will be effected, to say nothing of other
advantages.
With ships boilers especially in order to prevent the rivets or bclts from
becoming leaky and to protect the boiler plates the fire chamber is lined with
fire brick as shown by the drawings Figures 3 and 4.
J. GASTEIGER.
COMPLETE SPECIFICATION.
Improvements in Steam Boiler and other Furnaces.
I, JOHANN GASTEIGER, of Erdbergerlände, 6, Vienna III., in the Empire of
Austria, 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 a construction of gas fired furnaces in which the coal is
subjected to a process of dry distillation, the products of combustion, namely
carbonic oxide, hydrogen, light and heavy carburetted hydrogen etcetera being
burnt over a grate located behind the chamber or place of distillation, the grate
being fed with glowing coke produced in the distilling process the combustion of
which is maintained by a supply thereto of heated air. At the same time heated
water steam is conducted to the under side of the grate and through the bed of
glowing coke so as to form water gas. Before leaving the combustion space the hot
gases evolved in the dry distillation process, the coke combustion with highly heated
air and the water gas are met by highly heated air whereby a complete combustion
of the said gases is brought about.
In the accompanying drawing
Figs. 1 and 2 are respectively a longitudinal section and a cross section of an
arched brick furnace of this invention.
Figs. 3 and 4 similar sectional views of a flue tube boiler furnace.
Figs. 5 and 6 similar views of a locomotive furnace.
A is the place or are the chambers for the distillation of the coal, B the com-
bustion space, R fire grate. L, 1, are tubes or passages arranged either in the arch
or sides of the furnace (Figs. 1-4) or in the fire box (Figs. 5, 6) in such a way
that the air for the passage of which they serve is highly heated before arriving at
combustion.
The supply of water steam takes place through pipes D (Figs. 3-6) or by the
evaporation of water in trough W (Figs. 1, 2) by radiating heat and by the heated
air from L passing over the surface of the water.
Valves or slides are provided for regulating the tubes or passages L, l, and D and
also for regulating the discharge of the burnt gases.
The fire place and ash pit are provided with closely fitting doors which are kept
closed as much as possible.
In working the furnace, coke produced by the distilling process at the front
part of the furnace at A or in the distilling chambers A is passed on to grate B,
and A supplied with fresh coal. Whilst distillation commences at or in A the coke
on grate B burns with simultaneous formation of water gas by reason of the supply
through L and D respectively of hot air and steam. The products of distillation
coming from A, the products of combustion from B and the water steam are met by
highly heated air from L and in this way a perfect combustion of the whole of these
gases is brought about.

page_text: By pushing the coke back from A to B and throwing on fresh coal the firing is
made continuous.
The furnace gases are conducted from the combustion space to the surfaces to be
heated and thence to the chimney.
This kind of gas firing may be applied to stationary, locomotive and marine
boilers and to other appliances for heating purposes.
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 1
claim is
A gas fired furnace or heating appliance consisting of a coal distilling space or
chamber A open on one side in combination with adjoining combustion space B,
grate R underneath which steam is admitted either through pipe D or by
evaporation of water in vessel W, and conduits Ll for the supply of highly
heated atmospheric air for the purpose specified substantially as described and
shewn.
Dated this 23rd day of December 1890.
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.