Improvements in and relating to Apparatus for. Drying Super- phosphates and other Granular Materials.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Apparatus for. Drying Super-
phosphates and other Granular Materials.
We, CARL ZIMMERMANN, of Harburg, Merchant, and OSCAR RUPERTI,
ALEXANDER BORGNIS, CARL VON MEROK, and ERNEST MEROK, Importers and
Manufacturers, trading under the name of H. J. Merck & Co., of Dovenhof 6
Brandstwick, Hamburg, all in the Empire of Germany, do hereby declare the
nature of this invention to be as follows:-
This invention relates to apparatus for drying superphosphates and other
granular materials and bears more especially upon the arrangement of a drying
chamber in the form of a chimney, mechanically operated sliding surfaces with a
shaking device acting without jerks, and a device whereby the inclination of each
single surface is separately adjusted (even during the operation) so that each single
surface may be shaken at a different speed.
The object of the improved drying apparatus is to obtain, together with a
comparatively inexpensive operation, a great working capacity, and to obviate the
inconveniences of the apparatus heretofore employed, more particularly the dia-
advantage of a part of the phosphoric acid soluble in water returning to insoluble
forms during the drying process.
This apparatus presents the form of a shaft-furnace; through its upper cover
extends the channel of a chimney and also the pipe for admitting the material to
be dried, which pipe may be regarded for instance as the continuation of an
elevator pipe for raising the material.
The drying of this material takes place by the direct introduction of products of
combustion, the temperature of which may be regulated by means of suitable air
channels provided in the apparatus. The said products enter the drying chamber
at the bottom and leave through the chimney at the top.
In the drying chamber of the apparatus a number of shaking plates or boxes are
provided above each other at intervals, one plate inclining to one side and the next
to the other side. These shaking plates are adapted to be set in motion from the
outside by belt pulleys and eccentrics, and are adjustable from the outside even
during the operation. They are suspended by chains and shafts, each of the latter
being arranged to he turned separately by ratchet wheels and pawls provided.on
the outside of the apparatus.
By this arrangement the chains of each single shaking plate may be lengthened
or shortened both in front and at the rear, thereby changing the inclination of each
single shaking plate and also the depth of fall between them according as the
superphosphate to be dried is to pass rapidly or slowly through the drying
apparatus in view of the amount of moisture it contains.
This apparatus is provided at two opposite sides with large openings adapted to
be closed by iron doors and enabling the drying process in the interior to be
watched during the operation, the cleaning to be facilitated and any damaged parts
to be readily replaced.
As a characteristic feature of the improved apparatus for drying superphosphates
may be regarded the lateral arrangement of the coke furnace, permitting of a
convenient removal of the dried superphosphates on the inclined sliding surface

page_text: and a regulation of the heating gases by the air channels terminating above the
grate.
Dated this 1st day of March 1895.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.
Improvements in and relating to Apparatus for Drying. Super-
phosphates and other Granular Materials.
"
We, CARL ZIMMERMANN, of Harburg, Merchant, 080AB, RUPERTI,
ALEXANDER BORGNIS, CARL YON MERCK, and ERNEST MEROK, Importers and
Manufacturers trading under the name of H. J. Merck & Co., of Davenhof 6
Brandstwick, Hamburg, all 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 :-
This invention relates to apparatus for drying superphosphates and other.
granular materials, and bears more especially upon the arrangement of a drying
chamber in the form of a chimney, mechanically operated sliding surfaces with a
shaking device acting without jerks, and' a device whereby the inclination of each
single surface is separately adjusted (even during the operation) so that each single
surface may be shaken at a different speed.
The object of the improved drying apparatus is to obtain, together with a
comparatively inexpensive operation, a great working capacity, and to obviate. the
inconveniences of the apparatus heretofore employed, more particularly the
disadvantage of a part of the phosphoric acid soluble in water returning to
insoluble forms during the drying process,
"
In the annexed drawings
Fig. 1 shows the apparatus in vertical section,
Fig. 2 shows a front elevation of the shaft partly in section,
Fig. 3 shows a side elevation of same partly in section.
Mis the drying shaft through the upper end of which extends the channel of a
chimney N and also the pipe for admitting the material to be dried, which
pipe may be arranged as the continuation of the elevator pipe for raising the
material.
"
1.
The drying of the material takes place by the direct introduction of products of
combustion, the temperature of which may be regulated by means of suitable, air
channels provided in the apparatus. The said products enter the drying.
chamber M at the bottom and leave through the chimney at the top.
In the drying chamber of the apparatus a number of shaking plates or boxes b
are provided above each other at intervals, one plate inclining to one side and, the
next to the other side. These shaking plates are adapted to be set in motion from
the outside by belt pulleys a' and eccentrics a, and are adjustable from the outside.
even during the operation. They are suspended by chains c and d and, shafts.e
and f, each of the latter being arranged to be turned and fixed separately by.
ratchet wheels g and pawls provided on the outside of the apparatus.
B
By this arrangement the chains of each single shaking plate may be lengthened
or shortened both in front and at the rear, thereby changing the, inclination of each.
single shaking plate and also the depth of fall between them according as the
superphosphate to be dried is to pass rapidly or slowly through the drying
apparatus in view of the amount of moisture it contains.
The apparatus is provided at two opposite sides with large openings / adapted
to be closed by iron doors i and enabling the drying process in the interior to.be

page_text: watched during the operation, the cleaning to he facilitated and any damaged parts
to be readily replaced.
As a characteristic feature of the improved apparatus may be regarded the
lateral arrangement of the coke furnace k, permitting of a convenient removal of
the dried superphosphates from the inclined sliding surface and a regulation of the
heating gases by the air channels r terminating above the grate.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The combination with a shaft-furnace for drying superphosphate and other
granular materials of alternately inclined shaking plates or boxes, devices for
moving same in horizontal direction and a device whereby the inclination of each
single plate is separately adjusted, essentially as described and shown..
Dated thie 30th dex of October 1.805
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.