Improvements in and relating to Malt Kilns.
Year: 1893

page_text: Date of Application, 4th Feb., 1893-Accepted, 1st Apr., 1893
COMPLETE SPECIFICATION.
Improvements in and relating to Malt Kilns.
I, JOSEF GREGOR of Russische Gasse 20 Czernowitz in the Austro-Hungarian
Empire, Architect, 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 relates to malt kilus and its object is to provide means whereby
in addition to the ordinary roasting of the malt, a preliminary drying is or may be
accomplished.
In carrying this invention into effect the kiln is furnished with two drying floors.
or grates, the lower one carrying the malt to be roasted and which is subjected to
the great heat of the furnace, and the upper one containing the fresh or green
malt. The preliminary heating of the malt on the upper floor is accomplished
either by the hot air and gases arising from the lower floor, or by air drawn from
the outside of the kiln and which is heated to the desired degree by the products
of combustion from the furnace. The heated air is led through the mass of the
fresh malt which is thus dried without any necessity for turning or stirring. A
merely superficial drying of the malt is at the same time prevented. By means of
suitable dainpers or valves which control the different air channels or passages the
temperatures of the two floors may be regulated independently of each other.
Referring to the accompanying drawings reference to which is hereinafter
made:-
Figure I is an illustration of a horizontal section of the kiln along the line E F
(Figure 11) shewing the apparatus for heating the external air, and
Figures II and III represent vertical sections of the kiln at right angles to each
other and along the lines A B and C D (Figure I) respectively.
As shewn in the drawings an air chamber L is placed between the upper floor O
and the lower floor V. This chamber is in communication with the external
atmosphere and has passing through it pipes J by means of which the heated air
and gases are passed from the space over the lower floor V to the space below the
upper floor O. The upper ends of the pipes J are contained within larger pipes A
which open into the air chamber L. Upon a current of heated gases passing
through the pipes J a quantity of cold air is drawn from outside the kiln through
the passages K into the chamber L as shewn in Figure III. From the air chamber
it passes up the pipes A and is mixed with the heated air escaping from the
pipes J. Any desired temperature beneath the floor O can be obtained by
regulating the quantities of either cold or hot air passing by means of the dampers
or valves M M¹.
In some cases, such for instance as when it is desired to roast the malt upon the
lower floor at a very high temperature it is necessary to close all access from it to
the upper floor by the dampers M². The preliminary heating of the fresh malt
is then accomplished in the following manner.
The products of combustion from the furnace instead of being allowed to escape
directly into the flues are diverted by the dampers S into the heating pipes R
whence they are led downwards by the tubes T T into the pipes Y Y which are
contained within a separate air chamber. These pipes Y are in communication
with the flues G as illustrated in Figure II.
The cold air entering the apparatus through the pipes X is heated by passing
between and around the pipes Y and is conducted through the channels K to the
air chamber L finally escaping below and passing through the floor O. The
quantity of air admitted and the amount of heat transmitted to the upper floor
O may be regulated at will by the dampers M.

page_text: By the use of a kiln constructed as hereinbefore described a slow drying of the
malt is effected, which materially assists the sugar forming process and increases
the percentage of saccharine compared with the dextrine thus giving a greater
value to the malt:
A saving in the cost of working the kiln is also effected as much of the heat
which formerly passed away and was wasted is now utilised.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is―
1. A malt kiln furnished with two floors and provided with means by which the
heated air or gases from the lower floor-and-air from the external atmosphere may
be conveyed to the upper floor, constructed and arranged substantially as and
for the purpose hereinbefore described and as illustrated by the accompanying
drawings.
2. A malt kiln furnished with two floors and provided with apparatus by means
of which the products of combustion from the furnace may be utilised to heat air
passing from the external atmosphere to the upper floor all constructed and
arranged substantially as and for the purpose hereinbefore described and as
illustrated by the accompanying drawings.
Dated this 3rd day of February A.D. 1893.
WILLIAM E. HEYS,
Agent for the Applicant.