Improvements in and connected with Steam Boiler and other Furnaces.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in and connected with Steam Boiler and other
Furnaces.
I, CARL WILHELM STAUSS, of 23, Spenerstrasse, Berlin, N.W., in the Empire of
Germany, Engineer, do hereby declare the nature of this invention to be as
follows:-
The invention which forms the subject of the present application relates to a
process of firing to enable a continuous working of the furnace to be obtained
without smoke, such process being suitable for steam boilers and other furnaces.
The apparatus for carrying out the invention consists of a gasification chamber,
limited in front by an upright grate, and of a combustion chamber connected to the
said gasification chamber the said combustion chamber being provided with a
slanting grate.
Both chambers are separated at the top by a fire-brick, arch. The slanting grate
is carried on a frame which can be turned on a lower support, the side carriers of
which, prolonged towards the front, are suspended by chains from rollers so as to
enable the grate to be raised and lowered by means of hand gearing. The lower
support of the slanting grate is so arranged that it may be inclined to the horizontal
up to an angle of 45°. The working position of both grates, that is to say of the
upright grate and the slanting grate, relatively to the firebrick arch can be altered
according to the nature and quality of the fuel.
Immediately under the slanting grate, and for the purpose of cooling it and
chilling the slag, steam tubes are arranged, the steam inlet of which is provided
with an air injector. The latter serves the purpose of conducting air into the
said tubes, shortly before stopping the working of the furnace when the door and
its openings, must be kept closed, so as not to admit air from above when
emptying the gasification chamber.
To prevent loss by radiation of the heat of the fuel in the gasification chamber,
and to prevent the outward dispersion of heat a chamber is provided enclosed by
iron walls. Its front wall is formed by a two leafed door in the upper part of each
leaf of which there are openings, closeable by slides, for the admission of the air
necessary for combustion; the doors themselves are opened only when the slag is
to be taken off and the ashes removed.
The closing of the fore chamber at the top is formed by the fuel hopper which
can be lifted out and which is made of sheet iron and provided with a closely
fitting lid.
The width of the gasifying chamber is regulated to correspond to the fuel to be
heated by setting the upright grate, so that enough air may enter the layer of
fuel for the combustion of the gases developing in the gasification chamber and to
draw these gases through the glowing fuel to the combustion chamber, so that
these gases do not enter the fore chamber. After the fire has been lighted in the

page_text: lowered slanting grate, it is raised by the hand gearing to such a height that its
distance from the fire brick arch about corresponds with the width of the lower
portion of the gasification chamber whereupon the hopper is filled with fuel. The
fuel covers the slanting grate evenly and fills the gasification chamber. When
the fuel is ignited on the whole slanting grate the whole fire brick arch becomes
incandescent and heats the fuel in the gasification chamber, so that it becomes
gasified. As air can enter the layer of fuel at any time, the gases which are given
off ignite and burn immediately they are generated, that is to say, before they reach
the combustion chambers. The process of gasification thus brought about is now
continuously and actively maintained by the upward radiation of the heat from
the already existing fire upon the gradually falling fuel, so that only coke which
burns free from smoke reaches the slanting grate. As the air necessary for
combustion can reach the fire only through the incandescent fuel, during the whole
time of working, because there is no direct opening into the combustion chamber,
and as if the grate is properly inclined it will be covered with fuel at all points,
combustion will always take place with the smallest amount of air. Thus an even
and higher temperature is produced in the combustion chamber, the grate can
therefore be made smaller in comparison with horizontal grates, and the draft be
reduced to the minimum. In consequence of this the combustion gases remain a
.long time in contact with the parts to be heated and can impart in a high degree,
their heat thereto, the more so as the heating surfaces remain free from soot
deposit. A considerable saving of coal is thus effected, amounting to 25 %.
The melting of the slag and the heating of the slanting grate, in consequence of
the high temperature, is prevented by the steam-cooling apparatus beneath the slant-
ing grate. The slag becomes porous through the chilling, can easily be removed,
and allows the air for combustion to penetrate it so that during working the
removal of slag is unnecessary.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
Improvements in and connected with Steam Boiler and other
Furnaces.
I, CARL WILHELM STAUSS, of 23, Spenerstrasse, Berlin, N.W., 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:-
The invention which forms the subject of the present application relates to a
process of firing to enable a continuous working of the furnace to be obtained
without smoke, such process being suitable for steam boiler and other furnaces.
The accompanying drawing shows the firing arrangement in vertical section as
applied to a tubular boiler.
The apparatus for carrying out the invention consists of a gasification chamber V,
limited in front by an upright grate S, and of a combustion chamber F connected
to the said gasification chamber the said combustion chamber being provided
with a slanting grate.
Both chambers are separated at the top by a fire-brick arch G. The slanting

page_text: grate is carried on a frame which can be turned on a lower support, M, the
end carriers A of which, prolonged towards the front, are suspended by chains from
rollers, N, so as to enable the grate to be raised and lowered by means of hand
gearing, B. The lower support of the slanting grate is so arranged that it may be
inclined to the horizontal up to an angle of 45°. The working position of both
grates, that is to say, of the upright grate and the slanting grate, relatively to
the fire-brick arch or metal plate G, can be altered according to the nature and
quality of the fuel.
Immediately under the slanting grate, and for the purpose of cooling it and
chilling the slag, steam tubes are arranged, not shown in the accompanying drawing,
the steam inlet of which is provided with an air injector. The latter serves the
purpose of conducting air into the said tubes, shortly before stopping the working of
the furnace, when the door, D and its openings, E must be kept closed, so as not to
admit air from above when emptying the gasification chamber V.
To prevent loss of the heat by radiation of the heat of the fuel in the gasification
chamber V and prevent the outward dispersion of heat, a front chamber is provided
enclosed by iron walls. Its front wall is formed by a two leafed door 1), in the
upper part of each leaf of which there are openings E, adapted to be closed by
slides, for the admission of the air necessary for combustion; the doors themselves
are opened only when the slag is to be taken off and the ashes removed.
The closing of the front chamber at the top is formed by the fuel hopper K which
can be lifted out and which is made of sheet iron and provided with a closely
fitting lid.
The width of the gasifying chamber V. is regulated to correspond to the fuel
to be heated by setting the adjustable upright grate's, so that enough air may enter
the layer of fuel for the combustion of the gases developing in the gasification
chamber and to draw these gases through the glowing fuel to the combustion
chamber F, so that the. said gases do not enter the fore front chamber. After the
fire has been lighted on the lowered slanting grate, it is raised by the hand
gearing, B to such a height that its distance from the fire brick arch G, about
corresponds with the width of the lower portion of the gasification
chamber V whereupon the hopper K is filled with fuel. The fuel
covers the slanting grate evenly and fills the gasification chamber.
When the fuel is ignited on the whole slanting grate, the whole fire
brick arch G becomes incandescent and heats the fuel in the gasification chamber V,
so that it becomes gasified. As air can enter the layer of fuel at any time,
the gases which are given off ignite and burn immediately they are generated,
that is to say, before they reach the combustion chamber F. The process of
gasification thus brought about is now continuously and actively maintained by
the upward radiation of the heat from the already existing fire upon the
gradually falling fuel so that only coke, which burns free from smoke, reaches
the slanting grate. As the air necessary for combustion can reach the fire only
through the incandescent fuel, during the whole time of the working, because there is
no direct opening into the combustion chamber F, and if the grate is properly
inclined it will be covered with fuel at all points, combustion will always take
place with the smallest amount of air. Thus an even and higher temperature
is produced in the combustion chamber, the grate can therefore be made smaller
in comparison with horizontal grates, and the draft reduced to the minimum.
In consequence of this, the combustion gases remain a long time in contact with
the parts to be heated and can impart, in a high degree, their heat thereto, the more
so as the heating surfaces remain free from soot deposit. A considerable saving
of coal is thus effected, amounting to 25%.
The melting of the slag and the heating of the slanting grate, in consequence of
the high temperature, is prevented by the steam cooling apparatus beneath the
slanting grate. The slag becomes porous through the chilling and can easily be
removed, and allows the air for combustion to penetrate it so that during working
the removal of slag is unnecessary.

page_text: 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:
-
:
1. A process of feeding fuel to steam boiler and other furnaces, distinguished by
the application of a firebrick arch or metal plate, G separating a gasification
chamber V from the actual combustion chamber F, which plate or arch is heated
to a state of incandescence by the fire gases conducted to it, for the purpose of
gasifying the coal in the chamber V, and to burn the gases there, as they arise, that
is to say outside the combustion chamber F.
2. A fuel feeding arrangement, according to Claim 1, in which a movable
upright, adjustable grate S, arranged below the feeding box, K, forms the front
boundary of the gasification space, while the actual grate is formed by a fire
spacé, F, and a slanting grate, R, supported in a hinge like manner at its other
end, M, which can be raised and lowered by hand gear, B, oven rollers, N.
Dated this 7th day of December 1898.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.