Improvements in Malt Drums.
Year: 1899

page_text: Date of Application, 25th Mar., 1899
Complete Specification Left, 6th Nov., 1899-Accepted, 10th Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in Malt Drums.
We, FRIEDRICH KNÜTTEL, Managing Director, and The BERLINER ACTIEX-
GESELLSCHAFT FUR EISENGIESSEREI UND MASCHINENFABRIKATION, both of G
Franklinstrasse, Charlottenburg, near Berlin, in the Empire of Germany, do
hereby declare the nature of this invention to be as follows;-
In the preparation of malt of a certain kind from the raw malt by drying
and curing the same the following conditions require to be observed, viz:
1. The ventilation by means of warm air the moisture and intensity of the
current to be capable of regulation at will.
2. The heating of the malt independently of ventilation.
These requirements are fulfilled in the arrangement of drum represented in
the accompanying drawing in which
Figure 1 is a longitudinal section of the apparatus constructed according to
the present invention.
Figure 2 is a detail view of a portion of the apparatus shown in Figure 1.
Figure 3 is a cross section of the apparatus on the line 3, 3, of Figure 1 and
Figure 4 is a cross section of the said apparatus taken on the lines 4, 4, of
Figure 1.
Similar letters of reference indicate corresponding parts in the several
figures of the drawing.
Generally speaking the drum is constructed in a similar manner to that
described in the Specification of our prior application No. 508 of January 9th
1899, that is, it consists of a slowly revolving closed shell or drum, which for
aerating purposes is provided with a perforated central tube closed at one end
and a number of outer perforated tubes in proximity of the periphery of the
drum, which are closed at the other end. The ventilating air enters the outer
tubes, passes through the perforations of the same into the grain with which
the drum is charged, and finds its exit through the central tube.
In order now to enable special predetermined qualities of malt to be produced
the outer tubes are provided with heaters for the circulation of a heating
medium, such as steam, air, or a liquid.
.
These heaters f, Figures 1, 3 and 4, are connected together at the front end
of the drum in such a manner, and are so arranged that the heating medium
enters by pipe c, passes through the heaters f disposed inside the outer tubes g,
and finds its exit through pipe h.
Figure 2 shows in detail the connection of pipes e and h with the supply
and discharge pipe of the heating medium, which connection, as is clearly
shown in the drawings, allows the whole drum to revolve together with the
pipes e and and the heaters f.
The drum is mounted in a closed kiln into which heated air can be intro-
duced through the inlet a, the moisture of such air being regulated by
admixing for example steam therewith. This air enters the outer tube 9 of
the drum where it becomes still further heated by contact with the heating

page_text: pipes. The air then passes through the malt and finally escapes at 6 through
the central flue K. The sprouts of malt are thereby broken off as usual. In
order to ensure regularity in the heating and ventilating of the malt in the
corners near the head of the drum, holes covered by perforated plates are
provided as shown in Figures 1, 2 and 3.
As is well known the volume of cured malt to the raw malt is as 1 to 1.8
or 1.9.
For this reason it is impossible to carry out in one operation the process
of drying and curing, in a single drum because of the central tube becoming
partially uncovered from the malt during the curing process and this again
preventing the malt from being thoroughly and evenly ventilated.
As it is however of great importance, especially in small malting arrange-
ments, to carry out the entire process in the one drum it is necessary to divide
the drum into several compartments. This is done by partitions which are the
same as the head plate of the drum provided with holes covered by perforated
plates d. The said compartments are then all filled to a certain extent with
raw malt and after the volume has become sufficiently reduced by the working
of the apparatus, one of these compartments is then emptied and its contents
discharged into the other compartments.
Where two apartments are adopted as in the example of the drawing the
arrangement is such that at the end of the operation one of such compartments
are empty and the remaining one only is filled. In connection with these com-
partments valves are provided for regulating the ventilating air-current and
which are closed after the compartments have been discharged.
mm are man holes provided with covers serving for charging and emptying
the drum or the compartments of the same.
The improved arrangement as here adopted is therefore suitable:
1. For malt drying, by supplying a ventilating air current either cold or
hot through the outer tubes and thence into the drum itself and giving such
air current any desired force, temperature and moisture.
2. For curing the malt, by heating the product to any temperature desired
independent of ventilation.
Dated thin 17th Ja of Vauch 1900
Improvements in Malt Drums.
We, FRIEDRICH KNÜTTEL, Managing Director, and The BERLINER ACTIEN-
GESELLSCHAFT FÜR EISENGIESSEREI UND MASCHINENFABRIKATION, both of 64
Franklinstrasse, Charlottenburg, near Berlin, in the Empire of Germany, 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; ―
In the preparation of malt of a certain predetermined quality from raw or 4
uncured malt, by drying and curing the same, the latter must be ventilated
by means of warm air, and the moisture of this air, and the intensity of the
current must be capable of being regulated. Moreover the heating must be
independent of the ventilation.
The present invention consists of a malt drum in which the above require-

page_text: ments are fulfilled. The said drum is illustrated in the drawing left with our
Provisional Specification, in which:-
-
Figure 1 is a longitudinal section of the apparatus constructed according
to the present invention.
Figure 2 is a detail view of a portion of the apparatus shown in Figure 1. .
Figure 3 is a cross section of the apparatus on the line 3-3 of Figure 1,
looking in the direction of the arrow, and,
Figure 4 is a cross section of the said apparatus taken on the line 44 of
Figure 1, looking in the direction of the arrow.
Similar letters of reference indicate corresponding parts in the several
figures of the drawing.
Generally speaking the drum is constructed in a similar manner to that
described in the Specification of prior application No. 508 of January 9th 1899,
that is to say, it consists of a slowly revolving closed shell or drum, a which
for aerating purposes is provided with a perforated central tube 6 closed at
one end, and with a number of outer perforated tubes 9 in proximity to the
periphery of the drum a, which tubes are closed at the opposite end to that of
the central tube b. The ventilating air enters the outer tubes g, passes through
the perforations of the same into the grain with which the drum a is charged,
and then passes out through the central tube 6, the course taken by the air
being indicated by the arrows shown in Figures 1 and 2.
In order to enable special predetermined qualities of malt to be produced,
the outer tubes 9 are provided with heaters for the circulation of a heating
medium, such as steam, air or liquid.
These heaters f, Figures 1, 3 and 4, are connected together at the front end
of the drum, in such a manner, and are so arranged, that the heating medium
enters by pipe e, passes through the heaters f disposed inside the outer tubes g
and returns through pipe h.
Figure 2 shows in detail the connection of pipes e and with the supply
pipe e and discharge pipe f¹, of the heating medium, which connection, as is
clearly shown in the drawing, allows the whole drum to revolve, together with
the pipes e and hand the heaters
The drum is mounted in a closed kiln into which heated air can be intro-
duced through the inlet p, the moisture of such air being regulated by
admixing for example steam therewith. This air enters the outer tubes 9 of
the drum where it becomes still further heated by contact with the heating
pipes f. The air then passes through the malt and finally escapes through the
central flue b. The sprouts of malt are thereby broken off as usual. In order
to ensure regularity in the heating and ventilating of the malt in the corners
near the head of the drum, holes covered by perforated plates & are provided
as shown in Figures 1, 2 and 3.
The manner in which the said holes serve to ensure regularity in the heating
and ventilating of the malt is substantially the same as described in prior
Patent No. 13675 of A.D. 1888 granted to Henning. In said prior patent
however the partition wall itself is perforated, whereas in the present applica-
tion there are provided holes in the partition wall which are covered by perforated
plates d.
For the purpose of stirring the grain or malt the drum is mounted upon
suitable roller bearings, and adapted to be slowly rotated.
As is well known the ratio of cured malt to the raw malt is as 1 to 1.8 or 1.9.
For this reason it is impossible to carry out in one operation the process of
drying and curing in a single drum on account of the central tube becoming
partially uncovered from the malt during the curing process, and this again
preventing the malt from being thoroughly and evenly ventilated.
As it is however of great importance, especially in small malting arrange-
ments, to carry out the entire process in the one drum, it is necessary to divide
the drum into several compartments. This is done by means of partitions
•

page_text: which are, like the head plate of the drum, provided with holes covered by
perforated plates d. The said compartments are then all filled to a certain
extent with raw malt, and after the volume has become sufficiently reduced by
the working of the apparatus, one of these compartments is then emptied, and
its contents discharged into the other compartments.
Where two compartments are adopted as shown in the drawing the arrange-
ment is such that at the end of the operation one of such compartments is
empty and the remaining one only is filled. In connection with these com-
partments a valve c is arranged in the partition for the purpose of regulating
the ventilating air-current, which valve is closed after the contents of the
compartment has been discharged.
m, m are man holes provided with covers serving for charging and emptying
the drum or the compartments of the same.
The drum is rotated by means of the transverse worm-shafts in gear with
the rack fixed to the exterior of the drum.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. A drum of the kind described in prior Specification No. 508/1899 for
drying and curing malt, arranged in a closed chamber which latter is adapted
to be supplied with an air-current, the temperature and moisture of which is
capable of being regulated, in combination with heaters arranged inside the
ventilating tubes located near the periphery of drum and pipes for supplying
the heating agent to and discharging it from the said heaters, substantially
as and for the purpose described.
2. In a drum of the kind above described, the arrangement which consists
in dividing the said drum into compartments which at the commencement of
the operation are all charged with the material to be treated for the purpose
of allowing the whole process to be completed in one drum by emptying one
or more of the compartments when the volume of the material has become
sufficiently reduced, and filling such material into the other compartments,
substantially as and for the purpose described.
Dated this 6th day of November 1899.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants.