AN IMPROVED METHOD OF UTILIZING THE WASTE HEAT OF COKE OVENS
Year: 1865

page_text: LETTERS PATENT to William Edward Gedge, of the Firm of John Gedge
and Son, of No. 23, Southampton Buildings, Chancery Lane, in the County
of Middlesex, Patent Agent, for the Invention of "AN IMPROVED METHOD
OF UTILIZING THE WASTE HEAT OF COKE OVENS."-A communication from
abroad by Antoine Barbier-Perroton, of Saint Etienne, Loire, France,
Sealed the 1st May 1866, and dated the 28th November 1865.
PROVISIONAL SPECIFICATION left by the said William Edward Gedge
at the Office of the Commissioners of Patents, with his Petition, on the
28th November 1865.
I, WILLIAM EDWARD GEDGE, of the Firm of John Gedge and Son, of No..23,
Southampton Buildings, Chancery Lane, in the County of Middlesex,
Patent Agent, do hereby declare the nature of the said Invention for "AN
IMPROVED METHOD OF UTILIZING THE WASTE HEAT OF COKE OVENS," (a communica-
tion to me from abroad by Antoine Barbier-Perroton, of Saint Etienne, Loire,
France, Merchant,) to be as follows:-
Numerous attempt have already been made to profitably employ the heat
lost in the flames of coke ovens, and in some special cases somewhat satis-
factory results have been attained, for example, in heating vertical boilers

page_text: placed in the vertical chimney; but in all these cases regard has only been had
to the heat produced by the combustion of the gases from the distillation, and
no use has been made of the heat of the sides of the oven, a heat which should
not, however, be neglected. By the use of the arrangement herein-after
described not only are the flames used to heat a boiler placed between two
ovens, but further, the heat of the ovens which attain a red heat is also
profitably employed.
The following is a description of this Invention -A steam boiler is placed
between two ovens, in which the coal is carbonized to make coke, the hot
gases produced by the combustion issue by, openings leading them beneath
the boiler, which they encircle in passing through a canal or conduit provided
for that purpose, finally escaping into the chimney. The major part of the
heat is thus profitably used. When from any cause whatever it is desired
that the heated currents should pass beneath the boiler the openings above
mentioned are closed by registers, and the gases pass by other openings into
flues which conduct them at once to the chimney. A register placed anywhere
in these flues serves. to open or close them. A space is left in the masonry
or brickwork.to give an easy approach, to the registers... Doors placed in the
sides of the ovens serve to regulate the working. In the case that from
repair or any other cause the production of steam should be insufficient,
coal may be burnt on a grating placed beneath the boiler for that purpose.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Edward- Gedge in the Great Seal Patent Office
on the 23rd May 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
EDWARD GEDGE, of the Firm of John Gedge and Son, of No. 23, Southampton
Buildings, Chancery Lane, in the County of Middlesex, Patent Agent, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of November, in the year of our
Lord One thousand eight hundred and sixty-five, in the twenty-ninth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said William Edward Gedge, Her special licence that I, the said
William Edward Gedge, my executors, administrators, and assigns, or such
others as I, the said William Edward Gedge, my executors, administrators,
and assigns, should at any time agree with, and no others, from time to

page_text: time and at all times thereafter during the term therein expressed, should
and lawfully might make, use, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "AN IMPROVED METHOD OF. UTILIZING THE WASTE HEAT OF COкк
OVENS," (a communication to me from abroad by Antoine Barbier-Perroton,
of Saint Etienne, Loire, France, Merchant,) upon the condition (amongst
others) that I, the said William Edward Gedge, my executors or adminis-
trators, by an instrument in writing under my, or their, or one of their
hands and. seals, should particularly describe and ascertain the nature of
the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said William Edward Gedge, do hereby declare
-the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, reference being had to the Sheet of Drawing hereunto annexed
I and forming part of this my Specification, and to the figures and letters of
reference placed thereon.
Numerous attempts have already been made to profitably employ the heat
lost in the flames of coke ovens, and in some special cases somewhat satis-
factory results have been attained, for example, in heating vertical boilers
placed in the vertical chimney; but in all these cases regard has only been
had to the heat produced by the combustion of the gases from the distillation,
and no use has been made of the heat of the sides of the oven, a heat which
should not, however, be neglected. By the use of the arrangement herein-
after described not only are the flames used to heat a boiler placed between
two ovens, but further, the heat of the ovens which attain a red heat is also
profitably employed.
:
The following is a description of this Invention:-A steam boiler A
(Figures 1, 2, and 3) is placed between two ovens B, B, in which the coal
is carbonized to make coke; the hot gases produced by the combustion issue
by the openings C, C, passing under and around the boiler in the canal or
conduit D provided for that purpose, and finally.escape into the chimney E. . It
will be seen that by this arrangement the major part of the heat is profitably
used. When from any cause whatever it is not desired that the heated
currents should pass beneath the boiler the registers 1, ", are closed, and the
gases then pass by other openings F, F, into the chimney by the flues or
conduits G, G. A register placed anywhere in these conduits serves to open

page_text: or close them.
A space K left in the masonry or brickwork permits the
registers r to be easily reached. Openings R in the sides of the ovens serve
for inspecting and regulating the working. In the case that from repairs or
any other cause the production of steam should be insufficient, coal may be
burnt on the grating H. This arrangement of ovens presents the advantage
of producing at the same time coke obtained in the usual state, and of
vaporizing water, also as usual in cases where the fuel used is gaseous, this
gaseous fuel consisting in the products of the distillation of the coal. The
adaptation of this method in factories therefore supplies them at the same
time with coke and steam, both of which they largely consume.
Figure 1 is a vertical section of this arrangement taken through the axis
of the steam boiler; Figure 2, a horizontal section on the level of the flues;
and Figure 8 a vertical section perpendicular to the axis of the steam
boiler.
Figures 1*, 2*, 3*, 4*, and 5* of the annexed Drawing shew a modifi-
cation of the above-described arrangement, which modification permits the
substitution of an oven or kiln for calcining lime quartz or any other material
of like nature in place of the steam boiler, Figure 1* being a longitudinal
section of lime kiln; Figure 2, a plan of entire arrangement; Figure 3, a
transverse section through back part of lime kiln; Figure 4, a longitudinal
section of entire arrangement; and Figure 5, front, side, and top plan views of
kiln door detached.
An oven or kiln A (see plan) inclined at an angle of 30 degrees replaces
the steam boiler, and in like manner is heated by the hot gases from the
coke ovens B, B¹. This kiln, usually about 10 yards long, is of greater
section at its base than at its upper part, and this must be the case because
the gases issuing from the ovens by the flues E soon abandon a great part of
their caloric, and when they arrive at the passage F to enter the chimney
they are cold, or at any rate have lost so much heat that that which remains
may be neglected. The lime being introduced by the door C at the upper
part of the kiln begins by drying, and as it slides towards the lower zones the
calcination becomes more and more complete, so that when arrived at the
bottom it may be withdrawn entirely prepared, which operation is effected by
the door H. An opening K permits inspection of the work and the introduc-
tion of any sort of instrument required to remove any possible obstruction.
The body or sole of the kiln is of sheet iron. A series of flues D placed at
the upper part of the ovens conducts the gases of these ovens direct to the
chimney; they are regulated by various registers placed in their length.
Other registers V. intercept all communication with the lime kiln.

page_text: These latter arrangements exist already in the first part of this Invention,
that is to say, in the steam boiler arrangement.
In conclusion, I would observe that this second application of the method
of utilizing the waste heat of coke ovens is but the complement of the first,
with which it is intimately connected, and that it may be used advantageously
in many localities.
In witness whereof, I, the said William Edward Gedge, have hereunto
set my hand and seal, this Twenty-third day of May, in the year of
our Lord One thousand eight hundred and sixty-six.
W. E. GEDGE. (LS.)