Improvements in the Construction of Kilns for Burning Lime and other similar Material.
Year: 1897

page_text: Date of Application, 3rd Aug., 1897
Complete Specification Left, 3rd May, 1898-Accepted, 9th July, 1898
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Kilns for Burning Lime and
other similar Material.
I, JAMES FOSTER, of Carnlough, County Antrim, Ireland, Lime Manufacturer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the construction of kilns for burn-
ing lime and other similar substance whereby a greater saving of fuel is effected,
and an improved quality of lime produced; while the cost of up keep is con-
siderably diminished.
In carrying out my invention I construct a chamber of the usual open vertical
type common in lime kilns.
Over this chamber I arrange a dome provided with a neck leading to a second
chamber of an inverted cone shape.
Through this dome I arrange a number of annular shoots for feeding part of
the fuel directly into the first described or principal chamber.
Across the top of the second or inverted cone shaped chamber I construct an
arched wall or mass of masonery of suitable depth or thickness pierced by a series
of vertical cylinderical chambers-preferably four in number-and also a central
feed shoot or passage.
The feed shoot being arranged in the centre of the arched wall or mass of
masonery secures equal distribution of fuel in the kiln.
It is understood that the fuel thus fed cannot touch the sides of the kiln, as
from its position generally and in relation to the vertical chambers surrounding
it, fuel cannot spread in any direction until it has passed through the neck leading
from the inverted cone shaped chamber to the main chamber where it mingles
and spreads with the material being burned and the fuel fed through the annular
shoots above described, thus producing a perfectly uniform heat, and consequently
a uniform quality of lime.
The vertical cylinderical chambers in the arched wall are filled to the top with
material to be calcined so that the products of combustion rising from the main
chamber and passing through these cylinderical chambers heat up the material
therein and thus the process of calcination is materially improved, and the quantity
of fuel required diminished.
The top of the kiln as herein described is surmounted by a suitable cone or
chimney which helps combustion and this free combustion, with my improved
manner of feeding, enables a kiln constructed according to my invention to
consume slack of the smallest description.
Doted this 30th day of July 1897.
J. K. FAHIE & SON,
Agents for Applicant, 9, Westland Row, Dublin.

page_text: Improvements in the Construction of Kilns for Burning Lime and
other similar Material.
I, JAMES FOSTER, of Carnlough, County Antrim, Ireland, Lime Manufacturer,
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 follow-
ing statement:-
-
This invention relates to improvements in the construction of kilns for burn-
ing lime and other similar substance whereby a greater saving of fuel is effected,
and an improved quality of lime produced; while the cost of up keep is con-
siderably diminished.
In carrying out my invention I construct a chamber of the usual open vertical
type common in lime kilns, the top of which is dome shaped and leads to a second
chamber of an inverted cone shape.
Through this dome shaped top are arranged a number of annular shoots for feed-
ing part of the fuel directly into the first described or principal chamber.
Across the second or inverted cone shaped chamber I construct an arched wall
or mass of masonry of suitable depth which is pierced by a series of vertical
cylindrical chambers-preferably four in number-and also a central feed shoot.
This feed shoot being arranged in the centre of the arched wall or mass of
masonry ensures an equal distribution of fuel to the kiln.
The accompanying drawings will enable the nature of my said invention to be
more readily understood and carried into practice.
Fig. 1 is a vertical section of a kiln constructed according to my invention taken
on line A, B, Fig. 3.
Fig. 2 is a vertical section of part of the same taken on line C, D, Fig. 3.
Fig. 3 is a horizontal section illustrating line A, B, Fig. 1, and line C, D, Fig. 2;
and
Fig. 4 is a horizontal section on line E F Fig. 1.
Similar letters indicate corresponding parts in each of the views.
H is the main chamber of the kiln, I is the second or inverted cone shaped
chamber, K, K, are the four vertical chambers in the arched wall or mass of
masonry L; and G is the central feed shoot through which the fuel is fed to the centre
of the kiln, while P, P, are the annular shoots for supplying the main chamber
with fuel.
It will be obvious that the fuel fed through the central shoot G, cannot practi-
cally come in contact with the sides of the kiln as from the position generally of
the shoot, the fuel cannot spread until it has passed through the neck leading to
the main chamber where it spreads and mingles with the material being calcined,
together with the fuel fed through the annular shoots above described.
(
A uniform heat is thus attained and consequently a uniform quality of lime is
produced..
When the kiln is in action the vertical chambers in the arched wall or mass of
masonry are filled to the top with material to be calcined so that the products of
combustion rising from the main chamber and passing through these vertical
chambers heat up the material therein and thus the process of calcination is
materially improved, and the quantity of fuel consumed considerably diminished.
The top of the kiln is surmounted by a suitable cone or chimney which helps
combustion and this free combustion together with my improved manner of feed-
ing enables a kiln constructed according to my invention to consume, not only less

page_text: fuel than kilns as hitherto constructed, but enables slack of the smallest description
to be advantageously used.
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 In combination with kilns for burning or calcining lime, cement or
analogous substances, the use of an arched shaped wall or mass of masonry L,
provided with a central feed shoot G, whereby fuel may be fed directly to the
centre of the kiln and thus a considerable saving in fuel effected, and destruction
to the interior of the walls reduced to a minimum, as herein described and illus-
trated in the accompanying drawings.
Second: In combination with kilns for burning or calcining lime, cement, or
analogous substances the use of an arched wall or mass of masonry L, provided
with a central feed shoot G, as claimed in Claim One, and a series of vertical
chambers K, K, whereby the material to be burned is fed eavenly to the kiln, while
being at same time subjected to heat in its descent through said chambers, sub-
stantially as herein described and illustrated in the accompanying drawings.
Third; In kilns for burning or calcining lime, cement or analogous substances,
the general novel construction and arrangement of parts substantially as herein
described and illustrated in the accompanying drawings.
Dated this 30th day of Anril 1808
J. K. FAHIE & SON,
Agents for Applicant, 9, Westland Row, Dublin.
J. K. FAHIE & SON,
Agents for Applicant, 9, Westland Row, Dublin.