IMPROVEMENTS IN AND RELATING TO APPARATUS CHIEFLY DESIGNED FOR UTILIZING THE WASTE HEAT FROM COKE OVENS OR OTHER FURNACES FOR EVAPORATING, CALCINING AND OTHER PURPOSES
Year: 1884

page_text: I COURTENAY KINGSFORD of Aulaby House Upper Clapton in the County of
Middlesex, Manufacturing Chemist do hereby declare the nature of my invention
for "IMPROVEMENTS IN AND RELATING TO APPARATUS CHIEFLY DESIGNED FOR
UTILIZING THE WASTE HEAT FROM COKE OVENS OR OTHER FURNACES FOR
EVAPORATING, CALCINING AND OTHER PURPOSES 37
to be as follows:-
My invention relates, to apparatus chiefly designed for utilizing the waste heat
'from coke ovens or other furnaces for the recovery or separation, by evaporation,
of the solid from the liquid portions of soda and other solutions; for the production
of caustic lime; for the calcination of the "slurry," or mixture of chalk and clay or
mud, in the manufacture of cement; or for other purposes.
My said invention consists in the combination, with a coke oven or other
furnace having flues or passages for the heat, of one or more receptacles or trays
so arranged in relation to the said flues or passages that the heat will act very
advantageously upon the substances contained in the said receptacles or trays, for
the purpose of calcining the same or for separating the solid from the liquid
portions thereof by evaporation, or for other purposes, as hereinafter set forth.
In carrying my said invention into practice I usually arrange each receptacle or
tray within one flue or passage and above another, so that heat is imparted to the
said receptacle from the heated top of the flue beneath it and is also deflected from
the top of the other flue upon the substance contained in the said receptacle.
As the chief object of my invention is to utilize the waste heat of coke ovens for
effecting the results above enumerated, I will hereinafter describe my improvements
as applied to a coke oven.
I prefer that the furnace proper wherein the coke is made should be arched or
D-shaped in transverse section like an ordinary gas-retort and built of brick or
other suitable material. On the top of the said furnace I place or construct a tray
or receptacle. This first tray should extend throughout nearly the entire length of
the furnace but at one end thereof there should be a space left for the formation of
a flue or passage through which the heated air and products of combustion from

page_text: the furnace can ascend at the back of the said tray into a flue or passage above the
same; from the top of this flue or passage the heat is deflected upon the contents
of the first receptacle. A second tray or receptacle is placed above the said flue or
passage, the top of which flue or passage is, if desired, made to form the bottom of
the said receptacle, and a space is left at one end of the said second receptacle
through which the heat can ascend into a flue or passage above it. I can employ
any suitable number of flues or passages containing trays or receptacles arranged in
this manner, so that the heat will circulate throughout the entire series thereof.
The soda solution, lime or other substance to be treated is pumped or otherwise
introduced into the said receptacles by any convenient means.
My improved apparatus may be advantageously used in paper mills for the
recovery, by evaporation, of the soda that has been used in the manufacture of
paper. After the liquid has been evaporated, the soda is removed from the said
receptacles and may be used repeatedly in the same process or operation, or may
be otherwise disposed of.
It is obvious that the dimensions of the said trays or receptacles and the material
of which they are made may be varied according to the nature of the process or
operation for which they are required. Moreover the arrangement of the said trays
or receptacles relatively to the flues or passages. may be somewhat modified if
desirable or necessary.
..In some cases, I construct and arrange my apparatus in such a manner as to
utilize the heat from a coke oven or other furnace first for carrying on any of the
above named processes and then for heating steam-boilers as described in the
specification of my former Letters Patent, dated 6th March, A.D. 1882, No 1078.

page_text: Ímprovements in and relating to Apparatus Chiefly Designed for
Utilizing the Waste Heat from Coke Ovens or other Furnaces
I, COURTENAY KINGSFORD, of Aulaby House, Upper Clapton, in the County of
Middlesex, Manufacturing Chemist, do hereby declare the nature of my invention
for "IMPROVEMENTS IN AND RELATING TO APPARATUS CHIEFLY DESIGNED FOR
UTILIZING THE WASTE HEAT FROM COKE OVENS OR OTHER FURNACES FOR
EVAPORATING, CALCINING AND OTHER PURPOSES" and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement:-
My invention relates to apparatus chiefly designed for utilizing the waste heat
from coke-ovens or other furnaces for the recovery or separation, by evaporation,
of the solid from the liquid portions of soda and other solutions; for the production
of caustic lime; for the drying or calcination of "slurry" (which is a mixture of
chalk and clay or mud) in the manufacture of cement; for the drying of other
substances that will not be injuriously affected by the high temperature in the
oven or furnace; or for other purposes.
My said invention consists essentially in the combination, with one or more
coke-ovens or other furnaces having flues or passages for the heat, of one or more
trays or other suitable receptacles so arranged in relation to the said flues or
passages that the heat will act very advantageously upon the substances contained
in the said receptacles, for the purpose of effecting the desired result, as hereinafter
set forth.
In carrying my said invention into practice, I usually arrange the said
receptacles one above the other in flues or passages above, and extending from,
the furnace, so that heat is imparted to the contents of each receptacle through the
bottom thereof and from the flames or heated products of combustion passing over
it, and from the heated surface above it.
As the chief object of my invention is to utilize the waste heat of coke-ovens for
effecting the results above enumerated, I will hereinafter describe my improvements
as applied to a coke-oven.
In the accompanying drawing.
Figure 1 is a vertical longitudinal central section of an apparatus made in
accordance with my said invention.
Figure 2 is a transverse section on the line x, x, Figure 1.
Figure 3 is a front elevation of the said apparatus.
Figure 4 is a horizontal section on the line y,'y, Figure 1.
A is the oven or furnace proper, wherein the coke is made, and which is
preferably arched or D-shaped as shewn, and is built of fire-brick or other suitable
material. B is a receptacle which is constructed on the top of the said furnace,

page_text: and which extends throughout nearly the entire length thereof. At the back of
this receptacle there is a flue or passage C, which is provided with a damper O¹,
and through which the heated air and products of combustion from the furnace A
can ascend into a flue or passage Dabove the same. Another receptacle B¹ is
constructed in a similar manner above the flue or passage D, a flue or space E
being left in front of this receptacle, through which the heat can ascend into a flue
or passage F; and a third receptacle B is provided above the flue F, a flue or
space G being left at the back of this receptacle, through which the heat can
ascend into the flue or passage H. Heat is imparted to the contents of each
receptacle through the bottom thereof, and from the flames passing over it, and
from the heated tops of the flues D, F and H.
I is a flue or space through which the products of combustion can escape into
the atmosphere, or into a flue beneath a steam-boiler if desired.
I can employ any suitable number of flues or passages containing trays or
receptacles arranged as above described so that the heat will circulate throughout
the entire series thereof, moreover, in some cases, I connect the receptacles in two
or more furnaces, so that heat can be applied to the soda-solution or other
substance, first in one furnace and then in another furnace.
The soda-solution, lime or other substance to be treated is pumped, or otherwise
introduced, into the said receptacles by any convenient means.
When a liquid is to be treated, I prefer to introduce it through a suitable pipe
into the receptacle B. In this case, I provide an overflow pipe J through which
the liquid will pass from this receptacle, when it is nearly filled, into the
receptacle B¹, and I provide the latter with an overflow pipe J¹, through which the
liquid will pass from the receptacle B¹, when nearly filled, into the receptacle B.
K, K¹ are outlet pipes whereby the liquid is discharged from the receptacle B, and
which are provided with cocks or valves, or are closed in any suitable manner so
that they can be easily opened when necessary.
When soda-solution is to be evaporated, it is allowed to flow continuously into
the receptacle B³, where its temperature is slightly raised. It flows thence into
the receptacle B¹ and thence into the receptacle B, whence it flows through the
pipes K, K¹, at a very high temperature, into any suitable vessel or vessels. To
facilitate and hasten the evaporation, the liquid in one or more of the receptacles
can, if desired, be agitated by jets of air or by means of any suitable devices.
L is a manhole, through which any solid matter that may accumulate in the
receptacle B can be removed.
When a solid substance is to be treated, I provide suitable apertures in the walls
of the apparatus for the introduction of the substance into the different receptacles,
and its removal therefrom.
My improved apparatus may be advantageously used in paper mills for the
recovery, by evaporation, of the soda that has been used in the manufacture of
paper. After the liquid has been evaporated, the soda thus obtained may be used
repeatedly in the said manufacture, or may be otherwise disposed of. The said
apparatus can, moreover, be used for burning or drying the lime obtained from
the bleaching powder which is largely used in the manufacture of paper; this lime
generally causes great inconvenience to the manufacturers and is usually allowed.
to flow into a river. But, when dried by my apparatus, it can be advantageously
disposed of; and the pollution of rivers can thus be prevented in many cases.
It is obvious that the dimensions of the said trays or receptacles, and the
material of which they are made, may be varied according to the nature of the
process or operation for which they are required. Moreover, the arrangement of
the said trays or receptacles, relatively to the flues or passages, may be somewhat
modified, if desirable or necessary.
It is, moreover, obvious that my apparatus, although it is chiefly designed for
utilizing waste heat, can be heated by means of fuel burnt specially for the

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
First. The combination, with one or more coke-ovens or other furnaces, of one
or more trays or other receptacles so arranged relatively to the flues or passages of
the said ovens or furnaces that the heat will act upon the substances contained in
the said receptacles as, and for the purposes, above specified.
Second. The improved apparatus constructed substantially as described with
reference to the accompanying drawing, for the purposes specified.
HASELTINE, LAKE & Co.,
For the Applicant.