IMPROVEMENTS IN THE CONSTRUCTION OF COMMON AND CONTINUOUS KILNS FOR UTILIZING WASTE HEAT
Year: 1884

page_text: "
I JOHANN HEINRICH COHRS Manufacturer of Hamburg in the Empire of
Germany do hereby declare the nature of my Invention for IMPROVEMENTS
IN THE CONSTRUCTION OF COMMON AND CONTINUOUS KILNS FOR UTILIZING
WASTE HEAT" 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 to utilize the waste heat of kilns especially of
continuous kilns for drying raw material, green bricks, and earthenware generally
before such goods are brought into the firing or burning chambers of the kiln.
Tho kiln is furnished with a roof that extends beyond the arca of the kiln and
is supported by a wall constructed concentrically to or parallel with the outer wall
of the kiln. Within this surrounding space also concentrically with the circum-
ference of the kiln the drying device is arranged. The manner in which this
is accomplished will be clearly understood by the following particular description
and in reference to the accompanying Sheet of Drawings wherein the Invention is
illustrated as applied to a circular continuous kiln for burning bricks, lime or other
goods.
Fig. 1 represents a longitudinal section at line a, b, c, d; Fig. 2, is a plan
partly in section. o designates the kiln and D the roof extending above the kiln
and supported by the surrounding wall M. The space between kiln o and wall M
is fitted with a framing of joists e supported by upright beams h divided into two
compartments placed one above the other. Above the framing e, air shafts L are
arranged preferably corresponding in number with the number of burning
chambers P of the kiln, but more or less may be provided as convenient or as
required by the material to be treated. These air shafts may be built of wood
covered by any suitable waterproof roofing material. From the circumference of
the wall to the sides of the air shafts the framing e is covered by a flooring i as
shown in Figs. 1 and 2 of the Drawing at divisions 1 and 2 which are represented
in horizontal section between i and another flooring m, the object of which will be
hereinafter explained.
F designates a staging (banquette) for conveying the green bricks, or unburnt
stones or material to be operated on to the drying compartments; such materials
may be raised and lowered to the "banquetto" by lifts, slopes, or in any other

page_text: suitable and convenient manner. Each division R between two neighbouring air
shafts L, is above the closed flooring i furnished with a second floor m, formed of
boards that are not put close together, but placed so as to leave a free space
between each other as shown in Fig. 2. of the Drawing at chambers 3 and 4.
These chambers 3 and 4 are represented in section above floor m.
The free space
between the boards of floor m of one compartiment or division, must in size be equal
to the section of one of the corresponding air shafts L, or nearly so. The
different compartments R between shafts L and above floors m are the drying
compartments.
On the floor m of the compartments R the green bricks or other goods to be
treated have to be placed in such manner that air can pass between the different
layers. Each shaft L is in communication with both neighbouring compartments R
by an opening or free space, left in the upright walls between the floors m and i.
The atmospheric air entering in the direction of the arrows through openings 8
of wall M, passes underneath flooring i and between drying room and kiln into the
space K above the burning chambers of the kiln where it is heated by the waste
heat of the kiln, kept confined by roof D. The heated air as will be seen (left
hand side of Fig. 1) enters the compartments R (which are at their inner sides
partly closed by a wall w) from above passes through the free space left between
the material that has to be dried, and finds exit through the openings of floor m
into the space between i and m and from there passes sideways into the
neighbouring air-shafts L and through these, escapes into the open air. In its
passage through the green bricks or other raw material the heated and comparatively
dry air takes up part of the moisture of the material and reaches the open air in a
damp state thus drying the goods in a very effective manner.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to bo performed I declare that what
I claim is
-
The drying device combined and arranged with and to kilns for burning
earthenware, lime, or other material, consisting of the chambers R for the
reception of the material to be dried, air shafts L the double flooring m and i of
which mis furnished with openings allowing the air, heated by the waste heat
of the kiln to pass over and between the material placed in compartments R into
the free space between m and i and further through openings sideways into the
neighbouring air shafts L the whole constructed and operating as and for the
purpose herein described and shown by the Drawings.
Dated this 10th day of August 1901
WALTER A. BARLOW,
Agent for J. H. Cohrs.