Improvements in Burning and Drying Kilns or Furnaces.
Year: 1899

page_text: Date of Application, 22nd June, 1899-Accepted, 5th Aug., 1899
CUBEL LUMIN
Improvements in Burning and Drying Kilns or Furnaces.
I, HENRI FRANS JOSEPH WEIJERS, of Bahnhofstrasse, Tilburg, formerly of
Udenhout, in the Kingdom of the Netherlands, 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 following statement:-
This invention has for its object, a burning and drying kiln or furnace in
which the drying passage, arranged between the rows of burning chambers, is
bordered along its entire length above and below by chambers, which carry off
the heated and smoke gases from the burning chambers. The chamber situated
above the drying passage is the collecting chamber for the heated gases and is
The chamber beneath
separated from the drying passage by means of a roof.
the drying passage is provided along the entire length and width of same with
smooth, corrugated, or even ribbed pipes, which are mounted on supports, or
suspended from the roof of said chamber. These pipes serve for carrying off the
smoke from the combustion chambers and are surrounded by the hot air drawn
off from the burnt out or finished chambers. By the use of these pipes, a great
heating surface is obtained, the free suspended or supported pipes, affording a
favourable opportunity for heating the air which is collected below and which in
itself contains little heat. The heat inherent in the smoke gases is thus made
available in the most practical manner for drying the material, because the
circulating heat is given off precisely at the floor of the passage, and thus tends
to pass upwards in the drying passage through the material to be dried.
A form of construction of the invention is shown in the accompanying draw-
ings, Figure 1 being a longitudinal section, Figure 2 a cross section, and Figure 3
a horizontal section on the line a of Figure 2.
The burning and drying furnace or kiln consists, as in the ordinary arrange-
ments, of burning chambers a arranged in two rows between which a drying
passage b is arranged. The drying passage b is bordered along its upper side by
a chamber n, which is employed as a so-called smoke collector, whilst a chamber
or space situated beneath the drying passage contains pipes d or other suitable
heating bodies serving for carrying off the smoke, or the products of combustion.
The chamber n above the drying passage is separated from the latter by a roof f.
This chamber is also directly in communication by means of passages p with
the pipes arranged under the floor of the drying passage, so that the smoke gases
accumulated in the chamber n are conveyed by the passages p into the pipes d.
The floor of the drying passages actually consists only of the rails g for the
rolleys or conveying wagons, which rails are supported by girders or supports, so
that there is no actual separation of these chambers and the heat radiating from
the pipes enters directly into the drying passage and comes in contact with the
bricks. The result is thereby attained that the air introduced at the discharge
end of the drying passage in its course through the bricks loses heat, and moving
in turn again downwards, plays round the pipes conveying the smoke gases, and
being thus constantly warmed is rendered capable of evaporating more moisture.
The pipes & located in the chamber under the floor of the drying passage are as

page_text: already mentioned, either mounted on supports or suspended on carriers hanging
from the rails. The smoke gases from the chamber a are conducted into the
smoke collector n by side passages h The draught may be regulated by means of
a bell valve inserted in the passage h. From the smoke collecting chamber n
the gases are conveyed through the passages to the pipes d arranged under the
floor of the drying passage, from whence after passing through the said pipes
they reach a flue r, and then escape through a chimney into the open air. In
the passage through the pipes, the heat of the smoke gases is given off along
the entire length of the drying passage, in such a way that at the end where the
material is discharged from the drying passage, the greatest heat is imparted to
the material as the gases from here passing through the drying passage to the
chimney, gradually cool down.
The movement of the gases is as follows:-
d
The smoke gases from the chamber a enter in the direction of the arrow P
through the passages into the smoke collecting chamber n and thence through
passages p to the pipes & through which they pass in order to escape through the
Hue and chimney into the open air. The hot gases or air emerging from the
burnt out or finished chambers which are to be cooled down, pass through holes
arranged in the roof of said chambers into a pipe m through which they pass into
and through a passage to the so-called air collector from whence they enter the
chamber situated under the drying passage and containing the pipes d and thus
come into action in the drying passage. In this latter passage the gases flow
round the pipes & conveying the smoke gases, and pass from beneath upwards,
between the material to be fired and towards the roof of the drying passage in
order then from here to be drawn off by artificial means, either by a chimney
or an exhauster or fan.
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 burning and drying kiln or furnace with a drying passage arranged between
both rows of firing or burning chambers, characterised by a series of pipes (d),
or other suitable heating bodies, being arranged in a chamber communicating with
the drying passage to convey the smoke gases from the burning chambers along
the drying passage to the chimney and into the open air, and by the said pipes
or heating bodies (d) being also played round by the hot gases or air drawn from
the burnt-out or finished and cooling-down chambers (a), said air being intro-
duced into the drying passage at the end where the material is discharged so as to
give up its heat, together with the heat radiating from the pipes (d) by rising
through the material to be dried, and then again descending, and playing round
said pipes (d), so as to be constantly again warmed whereby it is rendered capable,
with a vigorous circulation of the air to rapidly evaporate moisture, substantially
as herein before described.
T
T
1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.