Improvements in Dryers of Pulpy Moist Substances.
Year: 1888

page_text: Date of Application, 17th Sept., 1888
Complete Specification Left. 15th June. 1889-Accepted 14th Sept. 1889
PROVISIONAL SPECIFICATION.
Improvements in Dryers of Pulpy Moist Substances.
We, AUGUST BÜTTNER & Dr. CARL MEYER, both of Uerdingen on the Rhine,
Manufacturers do hereby declare the nature of this invention to be as follows :-
Our invention relates to an apparatus for drying pulpy substances such as distillers
grains and the like, without injuring the quality of the same, and in using the drying
agent to its full advantage and thus forming the substance into a dry and durable
product.
We achieve this by the direct use of fire, partly by the peculiar guidance of the
material to be dried, and of the drying agent in our apparatus, and partly by
the formation of an easely separated mixture of the steamed syrup-like mass to
be dried.
In order to make our invention more clear, we refer to the accompanying drawings
which form part of the present application and in which similar letters denote similar
parts throughout the different figures.
Fig. 1 shows a longitudinal section of our improved drying apparatus.
Fig. 2 shows a horizontal section through the line a ẞ fig. 1.
8
Fig. 3 shows a vertical section through the line y & fig. 1.
The warm mass or grains is led into the furnace L. M through the pipe R and
into the division L at E¹.
This furnace is divided into two divisions by the partition wall n and the stuff to
be dried can only pass from the division L to M through the pipe O. These parts L M
are each partly divided by the walls n n n into the subdivisions E' E2 E³ E* E* Eº,
for the purpose of getting a larger heating surface by making the sodden mass
take a circutus course each of these subdivisions are provided with heat conducting
plates which may be fast or movable.
The sodden mass in passing through the subdivisions E¹ E2 E3 E' is partly dried,
but cannot be completely dried, on account of the very hot gases in contact with the
same, it is therefore led through the pipe O into the division M where it comes in
contact with less hot gases and is here concentrated; then the thick syrup-like mass
flows off through the pipe P to the trough S which contains a worm; this worm is
made up of single blades.
The trough which can also contain two or more worms lies slanting, with its
lower end a little below the level of the mass in the drying furnace, as shown
in fig. 1.
Some dry material is led by the belts into the trough S and is mixed by the
action of the worm with the syrup-like mass which is then conveyed by the worm
up the trough, and let fall into the hopper D.
When the belts rare in the position B, then the dry material is conducted by
both belts, in the same quantity into the trough and that which is conducted
by is mixed with the syrup, first while that conducted by 1 is mixed with it
afterwards.
But should the mixture resulting be too moist, then the belt r is shifted into the
position B2, but should a moister mixture be required then all that is necessary to do
is to shift the belt into the position B¹.
In order to prevent the sticky substance from sticking to the blades of the worm,
there are scrapers z fitted to the top of the trough S, which scrape the material off
the blades as they come round.
Different trials have proved that it is very difficult to mix a syrup-like mass with
a dry mass mechanically, but can easely be accomplished when the syrup mass

page_text: contains acids, but they can easely be mixed by adding a small quantity of any
carbonate which puffs out the syrup.
But to arrive at a neutral condition, one is obliged to use ammonium carbonate
and at the same time warming the mass.
•
The salt used is added direct to the syrup or mixed with the dry mass.
The whole mixture is let fall through the funnel D into the second drying
apparatus G and here completely dried.
In order to arrive at a perfect drying of the mass in this apparatus G, there are two
means of transport used at the same time, a positive and negative; the positive-one
is a current of air, which acts on the lighter dried particles and conveys them to the
exit, the other is a negative one by means of a worm, which moves the heavier or
moist grains in the opposite direction and so the moist particles are forced to remain
longer in the drying apparatus and thus be fully dried.
The moist mass is tossed about in the apparatus G by the fans CC and thus
brought in contact with the circulating warm air and conveyed to the carrying away
worm K. There is a worm s on the shaft Q, arranged under and between the two
fans CC with the thread of the screw running in the contrary direction to that of
the current of air in the apparatus and by this means are the heavier or wet grains
always forced back into the apparatus.
Dated this 14th day of September 1888.
COMPLETE SPECIFICATION.
Improvements in Dryers of Pulpy Moist Substances.
We, AUGUST BÜTTNER & Dr. CARL MEYER, both of Uerdingen on the Rhine,
Manufacturers 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 :-
Our invention relates to an apparatus for drying pulpy substances such as distillers
grains and the like, without injuring the quality of the same, and in using the
drying agent to its full advantage and thus forming the substance into a dry and
durable product.
We achieve this by the direct use of fire, partly by the peculiar guidance of the
material to be dried and of the drying agent in our apparatus and partly by
the formation of an easily separated mixture of the steamed syrup like mass to
be dried.
In order to make our invention more clear, we refer to the drawings sent in with
provisional application in which similar letters denote similar parts throughout the
different figures.
Fig. 1 shows a longitudinal section of our improved drying apparatus.
Fig. 2 shows a horizontal section through the line a ẞ fig. 1.
Fig. 3 shows a vertical section through the line γ § fig. 1.
The pulpy moist substance is led into the furnace L M through the pipe R and
into the division L at E.
This furnace is divided into two divisions by the partition wall N and the stuff to
be dried can only pass from the division L to M through the pipe O. These parts LM
are cach partly divided by the walls n nn into the subdivisions E E E E* E* E*
for the purpose of getting a larger heating surface; each of these subdivisions is
provided with heat conducting plates which are movable in a vertical or rotary direction.
The sodden mass in passing through the subdivisions E E E E is partly dried,
but cannot be completely dried, on account of the very hot gases in contact with the
same, it is therefore led through the pipe O into the division M where it comes in

page_text: contact with less hot gases and is here concentrated, then the thick syrup like mass
flows off through the pipe P to the trough S, which contains a worm; this worm is
made up of single blades.
The trough, which can also contain two or more worms, lies slanting with its
lower end a little below the level of the mass in the drying furnace as shown
in fig. 1.
2"
Some dry material is led by the shoots into the trough S and is mixed by the
action of the worm with the syrup like mass which is then conveyed by the worm
up the trough, and let fall into the hopper D.
When the shoots rare in the position B, then the dry material is conducted by
both shoots in the same quantity into the trough and that which is conducted
by is mixed with the syrup first while that conducted by mixed with it
afterwards.
But should the mixture resulting be too moist, then the shoot is shifted into the
position B2, but should a moister mixture be required then all that is necessary to do
is to shift the shoot into the position B¹.
In order to prevent the sticky substance from sticking to the blades of the worm,
there are scrapers z fitted to the top of the trough, which scrape the material off
the blades as they come round.
Different trials have proved that it is very difficult to mix a syrup like mass with
a dry mass mechanically but can easily be accomplished when the syrup mass contains
acids, and so these can easily be mixed by adding a small quantity of any carbonate
which puffs out the syrup.
But if the mass or wash is of an alcoholic or neutral condition one is obliged to
use Ammonium carbonate and at the same time to warm the inass.
The salt used is added direct to the syrup or mixed with the dry mass.
The whole mixture is let fall through the funnel D into the second drying
apparatus G and here completely dried.
In order to arrive at a perfect drying of the mass in this apparatus G there are
two means of transport used at the same time, a positive and negative; the positive
one is a current of air, which acts on the lighter dried particles and conveys them to
the exit, the other is negative one by means of a worm which moves the heavier or
moist grains in the opposite direction and so the moist particles are forced to remain
longer in the drying apparatus and thus be fully dried.
The moist mass is tossed about in the apparatus G by the fans C C and thus
brought in contact with the circulating warm air and conveyed to the transporting
worm K. There is a worm s on the shaft Q arranged under and between the two
fans CC with the thread of the screw running in the contrary direction to that of
the current of air in the apparatus and by this means are the heavier or wet grains
always forced back into the apparatus.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
In dryers of pulpy moist substances.
1.) The combination of the furnace L M having hot air circulation canal inlet
pipe R and divided by partition N into two chambers L and M which are connected
by pipe O and subdivided by partitions nnn, the subdivisions containing heat radiating
plates E E E E E E'; with the trough S containing a worm and scrapers zz and
having adjustable shoots ; the trough being connected with the furnace by means
of pipe P and having outlet pipe P1 and with the closed apparatus having a rotating
xle provided with two sorts of blades S S¹ the one sort running parallel to the axle
he other inclined to the same the apparatus having a current of air passing through
s, in the manner and for the purpose substantially as described.
2.) The combination of the furnace L M having hot air circulation canal inlet
ipe R and divided by partition N into two chambers L and M which are connected
y pipe and subdivided by partitions nnn, the subdivisions containing heat

page_text: radiating plates E¹ E2 E3 E' E' E'; with the trough S containing a worm and
scrapers and having adjustable shoots rr, the trough being connected with the
furnace by means of pipe P and having outlet pipe P, in the manner and for the
purpose substantially as described.
3.) The combination of the furnace having hot air circulation canal having
two chambers L and M separated by partition N, each chamber subdivided by
partitions n nn the subdivisions containing heat radiating plates E¹ E2 E³ E* E³ E³,
inlet pipe R, connecting pipe O between the two chambers Land M and outlet pipe P
in the manner and for the purpose substantially as described.
4.) The combination of the trough S having a transport worm, scrapers z z z inlet
pipe P, outlet pipe P¹ and adjustable shoots, in the manner and for the purpose
substantially as described.
5.) The combination of a closed apparatus, through which a current of air passes.
and having a rotating axle provided with two sorts of blades S and S¹, the one sort
running parallel to the axle and the other sort inclined there to in such manner as to
move the material in the opposite direction to the air current with worms inlet D
and worm K in the manner and for the purpose substantially as described.
6.) The combination of a closed apparatus through which a current of air passes
and having a rotating axle provided with blades S and S¹ the former running parallel
to the axle, the latter inclined to the same, with the inlet D and worm K in the manner
and for the purpose substantially as described.
7.) The combination of a closed apparatus, through which a current of air passes
and having a rotating axle provided with blades S and S₁ the former running parallel
to the axle the latter inclined to the same in such manner as to move the material in
opposite direction to the air current in the manner and for the purpose substantially
as described.
8.) The combination of a closed apparatus through which a current of air passes
and baving a fan and a transporting worms for carrying the material in the opposite
direction to the current of air in the manner and for the purpose substantially as
described.
Dated Berlin. this 13th day of June 1889.