Year: 1886

page_text: I ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex
Engineer, do hereby declare the nature of this invention (a communication from
Eduard Hamélius of Paris in the Republic of France) to be as follows:-
==
It is well known that in cupolas and blast furnaces, oxide of carbon can be burned
by air-jets in the fire space and that the heat produced must be distributed among
a great quantity of matérial contained therein. The zone of the combustion of
the gases must therefore embrace a certain volume of the fire space and this is
realised by placing the air jets in an inclined plane.
Now at the same time that the oxide of carbon is burned, other combustible
gases may be burned which are introduced from without into the furnace and in
consequence the charges of coke may be lessened and partly replaced by less valuable
combustibles such as coal, lignite, or peat. To this end the furnace is connected
with a gas generator which can if necessary at the same time heat the air necessary
for the combustion of the gas produced.
The gas developed in the gas generator is introduced into the furnace through
openings arranged all round it and covered with a common casing which encircles
the furnace and is in communication with the gas generator through a conduit.
This gas is burned in an oblique zone of combustion by the air jets introduced
through an oblique series of air-holes. The common casing of these air-holes
which encircles the furnace is in communication with the principal wind box by a
suitable conduit which is provided with a valve to regulate the blast.
The gas
of the generator is composed of rd of combustible gas and of azote
and carbonic acid gas. It is introduced into the furnace at 700 to 800° centigrade
and so introduces an appreciable amount of heat. The combustible gas consists of
oxide of carbon carburet of hydrogen and free hydrogen and as these latter possess
a greater reducing power than oxide of carbon they can be introduced in excess in
proportion to the air of combustion thus permitting an augmentation of the
quantity of reducing gases in the furnace.
The gas generator is fed by the blast of the furnace by a pipe and the cinders
are liquified by the addition of fluxes and elliminated by a pit hole.

page_text: The pressure of the blast at the entrance is regulated in such manner as to
introduce the gaseous products to the furnace at a convenient pressure. If the gas
generator is intended to heat the air necessary for the combustion of the gas then
the outer walls of the gas generator, which are formed in the lower part of fire
bricks and in the upper of cast iron rings, form with their casing of sheet iron a
helicoidal box or a series of boxes communicating with each other through openings.
The cast iron rings are preferably provided with flanges.
The blast enters at the foot of the generator into a box formed by the lower
part of the latter and a casing and closed at the top. About midway it passes
through a suitable pipe into the upper part whence it passes into the distributing
box through a pipe after having passed through the different chambers.
By this circulation the air is heated and the casing is cooled.

page_text: Improvements in or relating to Cupolas and Blast Furnaces.
I ALFRED JULIUS BOULT of 823 High Holborn, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention (a communication from
Eduard Hamélius of Paris, in the Republic of France) and in what manner the
same is to be performed, to be particularly described and ascertained in and, by
the following statement:-
It is well known that in cupolas and high furnaces oxide of carbon can be
burned by air-jets in the shaft and that the heat produced must be distributed
among a great quantity of material contained therein. The zone of the com-
bustion of the gases must therefore embrace a certain volume of the shaft and this
is realized by placing the air-jets in an inclined plane..
Now at the same time that the oxide of carbon is burned other combustible
gases may be burned which are introduced from without into the furnace and in
consequence the charges of coke may be reduced and partly replaced by less
valuable combustibles such as coal, lignite or peat. To this end the furnaces are
connected with a gas generator which can if necessary at the same time heat the
air necessary for the combustion of the gas produced.
In the accompanying drawings
Figure 1 represents a cupola in connection with a gas generator.
Figure 2 a horizontal section of the gas generator.
Figure 3 a horizontal section of the gas chamber.
с
Figure 4 a plan of a transverse section on the inclined plane of the tuyeres.
The gas, developed in the gas generator A is introduced into the furnace B
through openings a a arranged all round it and covered with a casting C which
encircles the furnace and is in communication with the gas generator through a
conduit D. This gas is burned in an oblique zone of combustion by the air jets
introduced through an oblique series of tuyeres b b. The casing E of these tuyeres
which encircles. the furnace is in communication with the principal wind box E¹
by a suitable conduit F which is provided with a valve c to regulate the blast.
The gas of the generator is composed of of combustible gas and of azote and
carbonic acid gas. It is introduced into the furnaces at 700° to 800° centigrade
and so introduces an appreciable amount of heat. The combustible gas consists of
oxide of carbon carburet of hydrogen and free hydrogen and as these latter possess
a greater reducing power than oxide of carbon they can be introduced in excess in
proportion to the air of combustion thus permitting an augmentation of the
quantity of reducing gases in the high furnace.
In the drawings this gas generator is represented as a cupola A.
The gas generator is fed by the blast of the furnace by a pipe d and the cinders
are liquified by the addition of fluxes and eliminated by a pit hole.
The pressure of the blast at the entrance is regulated in such a manner as to
introduce the gaseous products to the furnaces at a convenient pressure. If the
gas generator is intended to heat the air necessary for the combustion of the gas
then the outer walls of the gas generator which are formed in the lower part of
the fire bricks and in the upper of cast iron rings form with their casing of sheet

page_text: iron ga helicoidal box or a series of boxes communicating with each other through
openings h. The cast iron rings are preferably provided with flanges.
The blast enters at the foot of the generator into a box formed for the lower
part of the latter and a casing which box or chamber is closed at the top. About
midway it passes through a suitable pipe J into the upper part f whence it passes
into the distributing box E through a pipe K after having passed through the
different chambers.
By this circulation the air is heated and the outer walls are cooled the latter
being in this way protected from rapid deterioration.
Having now particularly described and ascertained the nature of the said
Invention as communicated to me by my foreign correspondent and in what manner
the same is to be performed, I declare that what I claim is:—
1. The application to cupolas or high furnaces of an oblique arrangement of
tuyerés the air chamber of which communicates with the principal air supply
substantially as and for the purpose specified.
2. The combination of a gas generator with cupolas or high furnaces where
the combustible gas is' introduced by pipes which open into a common box in
communication with the gas generator.
•
3. The application of a cupola for the purpose of serving as an apparatus for
heating air and constructing it with a jacket of fire bricks and cast iron rings or
sections in order to form along with the envelope a spiral box or a series of boxes
opening into one another substantially as specified.