IMPROVEMENTS IN COKE OVENS
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said Richard de Soldenhoff at
the Office of the Commissioners of Patents on the 25th April 1882.
RICHARD DE SOLDENHOFF, of Merthyr Tydfil, in the County of Glamorgan,
Wales. "IMPROVEMENTS IN COKE OVENS."
My Invention relates to certain improvements upon the well known Coppée
Coke Ovens, the object being to increase the output of coke per oven.
The Coppée coke ovens are rectangular chambers surrounded with flues, located
in walls of the oven. The heat of the walls of the oven acts on the coal in the
oven, and disengages the gases, which when burnt in the flues give back to these
walls the heat taken from them just before. It will thus be seen that there is a
continuous action of taking and returning the heat from and to the walls of the
oven-Therefore, it may be concluded that if the combustion of the gases is perfect,
the surrounding walls of the oven are nothing else but heating surfaces.
My improvements consist in the means of restoring the heat to the ovens which
would otherwise be lost. In the ordinary Coppée ovens the space between the founda-
tion arch and the gas flues is composed of a series of flues having the same width
and running in the same direction as the ovens. Through this space air circulates,
which necessarily cools the flues on one hand, while ou the other it protects the
foundation arch from the action of the heat. This air when heated is discharged
outside without being utilized. From experiments made I have found that the
temperature of this air thus heated is sometimes raised to 600° Fah., and even
above.
According to my improvements the space between the bottom of the flues and
the top of the foundation arch is filled in with two or three rows of refractory
bricks. The mode or arranging them is analogous to that of the Siemens'
Regenerator.

page_text: The cold air enters at the foundation arch, rises by a series of openings formed
therein and enters a space wherin by circulating between the rows of refractory bricks
it is heated. This heated air passes to a common conduit or passage from which it
issues by a series of conduits. From thence it enters into a second series of conduits
situated above the ovens, and finally from the latter the hot air is distributed 5
through the flues situated above the partition walls. The space may, therefore, be
called a regenerator of heat. This improvement does not increase the cost of
construction and considerably increases the production of coke.
--
SPECIFICATION in pursuance of the conditions of the Letters Patent-liled-
by the said Richard de Soldenhoff in the Great Seal Patent Office on the
23rd October 1882.
RICHARD DE SOLDENuoff, of Merthyr Tydfil, in the County of Glamorgan,
Wales. "IMPROVEMENTS IN COKE OVENS."
My Invention relates to certain improvements upon the well known Coppée
Coke Ovens, the object being to increase the output of coke per oven.
The Coppée Coke Ovens are rectangular chambers surrounded with flues, located
in walls of the oven. The beat of the walls of the oven acts on the coal in the
oven, and disengages the gases, which when burnt in the flues give back to these
walls the heat taken from them just before. It will thus be seen that there is a
continuous action of taking and returning the heat from and to the walls of the
oven. Therefore, it may be concluded that if the combustion of the gases is
perfect, the surrounding walls of the oven are nothing else but heating surfaces.
My improvements consist in the means of restoring the heat to the ovens which
would otherwise be lost. In the ordinary Coppée ovens the space between the
foundation arch and the gas flues is composed of a series of flues having the saine
width and running in the same direction as the ovens. Through this space air
circulates, which necessarily cools the flues on one hand, while on the other it
protects the foundation arch from the action of the heat. This air when heated
is discharged outside without being utilized. From experiments made I have found
that the temperature of this air thus heated is sometimes raised to 600° Fah., and
even above.
According to my improvements the space between the bottom of the flues and
the top of the foundation arch is filled in with two or three rows of refractory
bricks. The mode of arranging them is analogous to that of the Siemens'
Regenerator.
The cold air, at normal pressure or compressed, enters at the foundation arch,
rises by a series of openings formed therein and enters the space between the
bottom of the gas flues and the top of the foundation arch, wherein by circulating

page_text: between the rows of refractory bricks it is heated. This heated air passes to a
common conduit or passage from which it issues by a series of conduits. From
thence it enters into a second series of conduits situated above the ovens, and
finally from the latter the hot air is distributed through the flues situated above
the partition walls. The space may, therefore, be called a regenerator of heat. This
improvement does not increase the cost of construction and considerably increases
the production of coke.
But in order that my Invention may be more fully understood I will proceed to
describe the saine by the aid of the accompanying sheet of drawings, in which
Fig. 1 is a longitudinal section of the improved coke ovens, and Fig. 2 is a sectional
plan of the same taken through the line a, b, c, d.
The space between the bottom of the gas flues B and the top of the foundation
arch A is filled in with two or three rows of refractory bricks. The arrangement
of the bricks is shown in the drawings, and it may be added that the mode of
arranging them is analogous to that of the Siemens' Regenerator.
The cold air enters at the foundation arch A, rises by a series of openings D
formed therein and enters the space F, wherein circulating between the rows of
refractory bricks it is heated. This heated air passes to a common conduit or
passago H from which it issues by a series of conduits G. From thence it enters into
a second series of conduits I, situated above the ovens, and finally from the latter
the hot air is distributed through the flues K situated above the partition walls. The
space F may, therefore, be called a regenerator of heat. The full arrows indicate
the passage of the air from the cold air entrance in the arch A to the entrance of
the heated air in the partition walls of the ovens; the dotted arrows indicate the
passage of the gases.
Fig. 3 is a longitudinal section taken partly through the foundation archi A and
partly through the main flue X of a modified arrangement of the improved ovens,
in which the heated gases themselves aro caused to circulate through the regene-
rating space F containing the rows of refractory bricks, Fig. 4 being a sectional
plan of the same taken through the regenerating spaco F.
In this arrangement the heated gases are first caused to circulate through the
space F for a given time and so thoroughly heat the rows of refractory bricks
arranged therein, after which the air is caused to circulate among the refractory
bricks, and becoming heated is conducted as already described to the flues K
situated above the partition walls.
As will be seen in plan the regenerating space F in this arrangement is divided
into two sections, through one of which the gases are caused to circulato, whilst
the air is circulating through the other section, so that the rows of refractory
bricks in one section of regenerating space F are being heated by the gases, whilst
those in the other section are giving up their heat to the cold air entering through
the passages in foundation arch A, the action of the two sections having to bo
reversed from time to time as their respective rows of bricks become sufficiently
heated or cooled.
To effect this a damper is provided in each of the air passages Y and Y¹ to
admit or prevent the entrance of air, through the foundation arch Å, (which is also
divided into two sections) to either section of the regenerating space F. Other
dampers V and V₁ are provided to open or cut off communication at the opposito
ends between the conduits G and I, whilst the gas flues B cominunicate at opposito
ends of the block of ovens with Blues W and W common to all of them, and each
capable of being put either in communication with one section of the regenerating
space F, by means of passage Z, or with the chimney or main flue X, by means of
passage Z, so as to direct the heated gases through either section. A damper is
provided to open and close these passages in each section. In the drawing the left
hand section of the regenerating space F is represented as having the heated gases
directed through it, whilst air is circulating through the right hand section and
passes to the Blues K as above described. For this purpose the air passage Y is
closed, and also the damper V, whilst the passage Z from flue W is open to the left

page_text: hand section of the regenerating space F, and the passage Z'. from flue W to the
chimney or main flue X is closed.
On the other hand the air passage Y' is open to admit air to the right hand
section of the foundation arch A, the damper V₁ is also open, and the flue W'
'communicates through passage Z' with the chimney or main flue, the passage Z
from flue W' to the right hand section of the regenerating space F being closed.
The heated gases will thus pass from flues B by flue W through the left hand
section of regenerating space F, from whence it passes by passage Z' of the right
hand section to the chimney or main flue X, whilst the air passes through the
right hand section of the regenerating space F, and by conduits G and I is conducted
to the flues K above the partition walls.
Having now described the nature of my said Invention and the manner of
carrying the same into effect I wish it to be understood, that what I claim is: The
manner of restoring the heat to coke ovens which would be otherwise lost,
substantially as herein described.
In witness whereof, I, the said Richard de Soldenhoff have hereunto set my
hand and seal this twenty-third day of October, in the year of our Lord
1000
RICHARD DE SOLDENHOFF. (L.S.)