AN IMPROVED CIRCULATING KILN FOR BURNING OR CALCINING LIMES, CEMENTS, BRICKS, AND OTHER GOODS OR MATERIALS
Year: 1878

page_text: LETTERS PATENT to Henry Reid, of Bexley Heath, in the County of Kent,
Civil Engineer, for the Invention of "AN IMPROVED CIRCULATING KILN FOR
BURNING OR CALCINING LIMES, CEMENTS, BRICKS, AND OTHER GOODS OR
MATERIALS." A communication from abroad by Alexander Toméi, of Brugge,
in the Empire of Germany.
Sealed the 3rd December 1878, and dated the 4th June 1878.
PROVISIONAL SPECIFICATION left by the said Henry Reid at the Office of
the Commissioners of Patents on the 4th June 1878.
HENRY REID, of Bexley Heath, in the County of Kent, Civil Engineer. "AN
IMPROVED CIRCULATING KILN FOR BURNING OR CALCINING LIMES, CEMENTS,
BRICKS, AND OTHER GOODS OR MATERIALS." A communication from abroad by
Alexander Toméi, of Brügge, in the Empire of Germany.
The Invention consists in securing, by up and down draughts or currents, the
effectually burning the contents of kilns, in which are placed lime, cement, bricks,
or other clay goods, and by an arrangement of flues and dampers to utilize the
waste heat and gases of the fuel employed. This is effected either by a suitable
chimney or by the aid of ventilators, blowers, or compressed air.
The principle of the Invention can be adapted to existing kilns, and consists of
burning the contents of kilns by circulating the heat or burning process in a con-
tinuous manner, as above described, through the several compartments or series of
kilns connected by flues and valvular or damper arrangements.
This Invention does not provide for burning the articles or materials above
described by the introduction of the fuel on the top, as is practised in Hoffman's
and other ring kilns of that class, but by the circulating principle of this Invention
the fuel is placed in contact with the articles or materials to be burnt, and thus
certainty of action is secured.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Reid in the Great Seal Patent Office on the 4th December
1878.
"AN
HENRY REID, of Bexley Heath, in the County of Kent, Civil Engineer.
IMPROVED CIRCULATING KILN FOR BURNING OR CALCINING LIMES, CEMENTS, 5
BRICKS, AND OTHER GOODS OR MATERIALS." A communication from abroad by
Alexander Toméi, of Brügge, in the Empire of Germany.
This Invention consists in securing, by up and down draughts or currents, the
effectively burning the contents of kilns, in which are placed lime, cement, bricks,
or other clay goods, and by an arrangement of flues and dampers to utilize the 1
waste heat and gases of the fuel employed. This is effected either by a suitable
chimney, or by the aid of ventilators, blowers, or compressed air.
The principle of the Invention can be adapted to existing kilns, and consists of
burning the contents of kilns by circulating the heat or burning process in a con-
tinuous manner, as above described, through the several compartments or series of 1
kilns connected by flues and valvular or damper arrangements.
This Invention does not provide for burning the articles or materials above
described by the introduction of the fuel on the top, as is practised in Hoffman's
and other ring kilns of that class, but by the circulating principle of this Invention
the fuel is placed in contact with the articles or materials to be burnt, and thus 2
certainty of action is secured.
I will now proceed to describe the manner in which the objects of my Invention
may be carried into effect.
In the accompanying Drawing Fig. 1 represents a sectional elevation of a kiln
designed to carry out the principle of the Invention, in which is shewn the bottom
of the kiln and the ground or lower flues b, c, and the upper flues e, d, shewing also
the general scheme of dampers and chimney shaft, as well as the surrounding platform
to facilitate the loading and management of the kiln when at work.
Fig. 2 represents plans of the kiln through, and at A, B, and C, D, of the sectional
elevation, Fig. 1; the one A, B, taken at the ground level, and C, D, at the loading
or platform level.
Fig. 3 represents plan section through E, F, and G, H, of the sectional elevation,
the one E, F, shewing the upper connection of the chambers with each other
through the flues d, d, and G, H, shewing the flues e, e, in connection with the
chimney.
The kiln is used without gratings, and is loaded from the top in the ordinary
way, the materials to be burned or calcined being laid in alternate layers with the
fuel.
The letters a, a, Fig. 2, are the unloading holes, two to each compartment, and
through which the necessary and regulated supply of air is introduced while the
burning is in progress, the letters b, b, and c, c, shewing the position of the con-
necting flues, while c, c, on section C, D, shew their position at the level of the
platform of the kiln.
Each compartment of the kiln can be separately burnt, should circumstances
render that course necessary; but the action of the kiln in its full working condition
is as follows:-Starting with one compartment after being filled with the material
to be burnt, and the proper quantity of fuel laid alternately with it, all the upper
openings are closed after perfect ignition at the top has been secured, and the
bottom flues b, b, are opened and put in communication with the vertical flues c, G
by which the moist vapours are conveyed by the fluid e, e, into the chimney
shaft S.
When the resulting gases from the burning compartment become heated and free
from moisture, the flue c, c, is closed, and the heat conveyed by b, b, into the next
from the first lighted compartment.
waste heat

page_text: The burning of the second compartment proceeds from the bottom, and is also
connected with the chimney shaft flue e, e, until all the moisture is eliminated, when
the draught is cut off from the flue e, e, and transferred to the flue d, d, where it in
turn conveys the heated gas to the next or third compartment, the burning of
which proceeds downward, as in the first compartment, and so on until the whole
series of the six compartments are started.
The valvular or damper arrangements are shown in Fig. 1, marked respectively
0, p, q, and made of any convenient shape or form.
The Drawings represent a six compartment kiln, but the principle admits of any
extension, either circular or rectangular in character. The principle may also be
applied to existing cement or other kilns.
The draught is, according to the above Drawing, produced by the chimney shaft,
but the same object may be obtained through the agency of exhausters, ventilators,
or other mechanical contrivances, or by compressed air.
During the time when any one of the compartments require to be repaired, it can
be readily detached from the other kilns by a temporary obstruction of the flues
which belong to it.
Having now described the nature of my said Invention, and the manner in which
the same is to be performed, what I desire to claim as my Invention is, the principle
of burning lime, cement, and other materials by vertical and perpendicular draught,
as described, and the utilization of the waste heat through the system of flues and
dampers, and the securing the continuity of a kiln so constructed.
In witness whereof, I, the said Henry Reid, have hereunto set my hand and
seal, this Fourth day of December, in the year of our Lord One thousand
eight hundred and seventy-eight.
DEID (10)