Improvements in the Construction of Drying Chambers for Bricks, Pottery, or other Objects, to Utilize Waste Heat.
Year: 1895

page_text: Date of Application, 19th Feb., 1895-Accepted, 18th May. 1895
Improvements in the Construction of Drying Chambers for Bricks,
Pottery, or other Objects, to Utilize Waste Heat.
I, VERNER FREDERIK LÆSSÖE SMIDTH of 3 Amalievej Copenhagen in the
Kingdom of Denmark, Civil Engineer 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 :—
The object of my improvements is to improve the construction of such drying
chambers for bricks, pottery or other objects, in which the hot air, collecting under
the roof of a building containing a kiln or other source of heat, is drawn through
chambers containing racks on which the bricks or other objects are placed, in order
to effect the drying of these.
In order to fully explain the improved arrangement I have annexed an
illustrative drawing giving in Fig. 1 cross section of the building and in Fig. 2
part of a longitudinal section of same.
The same letters apply to the same parts in the two figures.
kis the brick kiln or other source from which waste heat is obtained, the air
surrounding the kiln, or passing by it, being heated and, rising, collects under the
roof. The space over k is open but on both sides of it are arranged the drying
chambers d, between which are narrow chambers c, acting as flues for the air-
draught.
I then make the roof double and let these flues c open out into the space s
between the two coverings of the roof, which space communicates with a tall
ventilator v, running all along the ridge of the roof and which is provided with
louvre openings at the top where it is also covered by a small roof.
The corridors for the transport to and from the drying chambers, of the objects
to be dried, I place outside these chambers.
These external corridors f in connection with the double roof provide an
insulation, protecting the drying chambers, and what they contain, against too
great variations of the temperature outside, especially against the frost in the
winter, and insure an uniform and moderate drying.
The air draught, as shown by arrows in the drawing, will now take the following
course: Air from the lower part of the building passes in, close by the kiln and,
being heated by the waste heat radiating from the kiln rises towards the roof,
where also the heat emanating directly from the kiln will collect. The air is now,
by the action of the draught in the ventilator and in the spaces in the roof,
drawn in through the openings o, down through the drying chambers d, where the
drying is effected, and through the openings a into the flues c from whence it
passes up into the spaces in the double roof and into the ventilator v, and finally
passes out between the louvres l.
When bricks or other objecte are set in or taken out, the horizontally hinged
doors Band of the drying chambers are opened, as shown by the dotted circles
in Fig. 1.
The horizontally hinged doors E and e at the inner side of the chambers are
used in case of intense frost in the winter, when E is swung into its upper position
and e let down to rest on the edge of the kiln so as to shut out the access of cold
air from the lower part of the building, and then only a slight circulation of
relatively warm air takes place through the drying chambers, keeping the
frost out.

page_text: 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:
In connection with drying chambers, where the waste heat from a kiln or other
source of heat is utilized for the drying of bricks, pottery or other objects, the
general arrangement with corridors outside the drying chambers for the transport
to and from these, of the objects to be dried, the said drying chambers
communicating through flues and openings with a double roof through the hollow
space in which the draught is led from the drying chambers to a ventilator
extending along the ridge of the roof, particularly as described.
Dated this Thirteenth day of February 1895.
VERNER FREDERIK LÆSSÖE SMIDTH.