Improvements in Annular Kilns.
Year: 1899

page_text: Date of Application, 11th Aug., 1899
Complete Specification Left 23rd Anr 1900 Accented 2nd June 1900
Improvements in Annular Kilns.
I, WALTER FELD, of Villa Feld, Linz-on-the-Rhine, in the Empire of Germany,
Chemist, do hereby declare the nature of this invention to be as follows
The usual annular or continuous kilns have shown the defect that the gases
of combustion which are to heat the material to be burned do not completely
envelop same, but simply pass above it and thus do not utilise the fuel and heated
gases to the best advantage, and an un-uniform working of the several chambers
results.
The present invention aims at obviating this defect by conducting the said
gases in the several chambers in such a manner that these gases enter laterally
towards the centre of the chamber throughout the entire height of the chamber
wall.
;
This is attained by forming the walls of the several annular kiln chambers of
vertical rows of firebrick bars or grates so that each chamber possesses double
grates or vertical rows or tiers of bricks or plates placed louvre-wise, and the
furnace gases pass laterally through these grates towards the centre of the
chamber. Further by the vertical arrangement of the fire grates in contradis-
tinction to the horizontal grates hitherto used, the ashes are prevented from mix-
ing with the fuel, the ashes dropping in the grates so that a column of glowing
red hot fuel can constantly be kept up.
The chamber in which the articles to be burned are placed contains within its
walls the furnace, which is fitted with the vertically arranged louvre-like grates.
Air is introduced into the chamber from the top through a conduit and enters a
casing arranged in the middle of the chamber, said casing is open at the top and.
is provided with apertures in its lateral walls. The air then travels to a chamber
nearly surrounding the lower part of the kiln from which channel it passes into
a second channel, and then enters one of the chambers by the openings in the
vertical louvre-like grates from whence by means of the casing in the middle of
the chamber it is conducted to the next adjacent chamber. The grates and the
furnace are charged with burning coal which is raised in temperature till it glows,
the air assisting this process.
Each chamber is fitted with two grates through which the atmosphere or air
for combustion is conducted towards the centre of the chamber in the direction
of the opposite furnace. When the last chamber has been worked a conductor-
pipe is placed in the opening which conveys the gases into the chimney or up-take.
The several chambers are worked successively.
Dated the 11th day of August 1899
PHILLIPS & LEIGH,
Agents for the Applicant.

page_text: same is to be performed, to be particularly described and ascertained in and by
the following statement:-
The usual annular or continuous kilns have shown the defect that the gases
of combustion which are to heat the material to be burned, do not completely
envelope same, but simply pass above it and thus do not utilise the fuel and heated
gases to the best advantage, and an un-uniform working of the several chambers
results.
The present invention aims at obviating this defect by conducting the said
gases in the several chambers in such a manner that these gases enter laterally
towards the centre of the chamber throughout the entire height of the chamber
wall.
This is attained by forming the walls of the several annular kiln chambers of
vertical rows of firebrick bars or grates so that each chamber possesses double
grates or vertical rows or tiers of bricks or plates placed louvre-wise, and the
furnace gases pass laterally through these grates towards the centre of the
chamber. Further, by the vertical arrangement of the fire grates in contradis-
tinction to the horizontal grates hitherto used, the ashes are prevented from mix-
ing with the fuel, the ashes dropping in the grates so that a column of glowing
red hot fuel can constantly be kept up.
The accompanying, drawing, a kiln constructed in accordance with the present
invention.
Figure 1 is a longitudinal vertical section.
Figure 2 is a transverse vertical section; and
Figure 3 is a plan partly in section.
The chamber A in which the articles to be burned are placed, contains within
its walls the furnace B, which is fitted with the vertically arranged louvre-like
grates C.
Air is introduced into the chamber from the top through a conduit D,
and enters a casing E arranged in the middle of the chamber, said casing is open
at the top and is provided with apertures in its lateral walls. The air then travels
through a conduit F to a channel G, nearly surrounding the lower part of the
kiln from which channel it passes through a conduit H into a second channel J.
and then enters one of the chambers by the openings K in the vertical louvre-
like grates from whence by means of the casing E, in the middle of the chamber,
it is conducted to the next adjacent chamber. The grates and the furnace are
charged with burning coal which is raised in temperature till it glows, the air
assisting this process.
Each chamber is fitted with two grates through which the atmosphere or air
for combustion is conducted towards the centre of the chamber in the direction
of the opposite furnace. When the last chamber has been worked a conductor-
pipe Lis placed over the opening 1 which conveys the gases into the flue M, and
then to the chimney or up-take. The several chambers are worked successively.
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
.
A furnace for annular or continuous kilns the walls of which consist of ver-
tical louvre-like grates, the entire surfaces of which are traversed transversely by
the air of combustion.
ted the 23rd day of April 1900.
PHILLIPS & LEIGH,
No. 22, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.