Year: 1897

page_text: Date of Application, 13th Dec., 1897
7th
1000
And
4000
A Communication to me from GOTTLIEB THIMM, of Nikolsk, near Wladiwostok,
Ost-Sibirien.
I, EDMUND EDWARDS, of the Firm of Edwards and Co., Patent Agents and Engineers,
of 65 and 66, Chancery Lane, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows: :―
Drying kilns are already known in which the material to be dried is passed over
heated pipes, and by means of inclined Venetian-blind like sides to the chamber are
prevented from escaping.
Apparatus of this kind is not well adapted for drying grain, as the unusual
strength and persistence with which the latter retains moisture, prevents a satisfac-
tory result.
The present invention has for its object the perfecting of apparatus of the kind,
by separating by means of exhausting apparatus the vapour which is given off during
the drying process.
In the improved drying kiln a system of parallel drying tubes is used, arranged
preferably so as to form a vertical wall, the tubes forming which are arrangéd so that
in end view four vertical sets of horizontal pipes are used to form the total thick-
ness, the pipes being arranged in zigzag formi, those in one set coming opposite to
the spaces between those in the next set. The sets of pipes are connected together
at their ends so that steam admitted through the end of the upper pipes passes
backward and forward through them and eventually passes away through the end of
the lower pipes.
The entire set of pipes is enclosed on each side by a casing through which are
openings, directed upward and outward (in the manner of a Venetian blind) so as to
prevent the grain which is passing through the apparatus to be dried from being
scattered through them. Close outside this perforated casing are arranged a sufficient
number of horizontal suction pipes, all communicating with a larger vertical pipe at
one end, which itself communicates by a pipe with a fan or other suitable exhausting
apparatus, driven by any convenient power. Some or all of the horizontal suction
pipes described are provided with an adjustable regulating valve, and also with a
sliding plate, which can be raised or lowered, and held in any desired position by a
bolt or pin which can be fitted into any one of a series of holes in the slide. By
these means the size of the admission openings into the suction pipes can be exactly
adjusted.
The supply of the grain or material to be dried to the upper part of the series
of heated pipes is effected by means of a pipe or conductor leading into one end of a
horizontal pipe or chamber extending along the top of the apparatus, at a sufficient
distance above the highest pipes. This horizontal pipe has an opening or openings
below, through which the grain is evenly delivered by means of a screw conveyor in
the pipe or chamber.

page_text: If too much grain or other material is supplied to the chamber, it is
discharged through an overflow pipe at the other end. After having passed in
its descent over the set of heated pipes, the material passes out at the bottom,
through a longitudinal discharge opening, the size of which can be regulated by a
sliding board or plate, which can be worked by a handle from one end of the
apparatus.
The lower edge of the slide is formed with a series of notches which can be
arranged either to correspond with similar openings in the discharge opening, or so
that the latter are more or less closed.
For ensuring and regulating the regular discharge of the material, a constantly
revolving roller is arranged outside the slide, under the lower side of which the
material passes, and is delivered by it into a trough or chamber containing a screw
conveyor (similar to that in the upper part of the apparatus) by which the grain or
material is carried to the end of the trough and delivered through a pipe to an
elevator, by which the material is taken to a cooling chamber.
In the arrangement of the heating tubes described, the several tubes are at such a
distance apart and in such positions that a sufficient number of transverse vertical
strips or boards can be fitted between them, these boards having semi-circular recesses
in their edges which fit round and embrace the pipes, the edges of the boards fitting
against each other and against an outer wooden casing which surrounds the entire
apparatus at a sufficient distance, and is closed above by a cover above which the
upper screw conveyor is arranged.
The vertical boards which embrace the pipes, as well as the other parts, may be
held together by screws, and bands passing diagonally round the horizontal pipes of
suitable form and arranged in the most convenient positions.
The outer vertical sets of horizontal pipes may have their directing plates fitted in
suitable positions, so as to prevent the material being scattered through the inclined
openings in the sides of the casing.
The screw conveyors, fau, and elevator, are driven by any convenient power.
A communication to ine from GOTTLIEB THIMM, of Nikoisk. near Wladiwostok,
Ost-Sibirien.
I, EDMUND EDWARDS, of the firm of Edwards and Co, Patent Agents and Engineers,
of 65 and 66, Chancery Lane, in the County of Middlesex, 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, and
accompanying drawings, that is to say :-
Drying kilns are already known in which the material to be dried is passed over
heated pipes, and by means of inclined Venetian-blind like sides to the chamber are
prevented from escaping.
Apparatus of this kind is not well adapted for drying grain, as the unusua
strength and persistence with which the latter retains moisture prevents a
satisfactory result.
The present invention has for its object the perfecting of apparatus of the kind,

page_text: by separating by means of exhausting apparatus the vapour which is given off during
he drying process.
The accompanying drawings are in illustration of the invention. Figure 1 is a
ongitudinal section; Figure 2 a transverse section; and Figure 3 a horizontal section.
Figure 4 shows a part of Figure 2 upon a larger scale.
In the improved drying kiln a system of parallel drying tubes a (Figures 1 and 2)
are used, arranged preferably so as to form a vertical wall, the tubes forming which
are arranged so that in end view four vertical sets of horizontal pipes are used to
form the total thickness, the pipes a being arranged in zigzag form, those in one set
coming opposite to the spaces between those in the next set. The sets of pipes a are
connected together at their ends so that steam admitted through the end of the upper
pipes at 1, passes backward and forward through them and eventually passes away
through the end of the lower pipes at 2, (Figure 1).
The entire set of pipes a is enclosed on each side by a casing b through which are
openings, c, c, Figures 2 and 4, directed upward and outward (in the manner of a
Venetian blind) so as to prevent the grain, which is passing through the apparatus to
be dried, from being scattered through them. Close outside this perforated casing b
are arranged a sufficient number of horizontal suction pipes d, (Figures 2 and 3) all
communicating with a larger vertical pipe D at one end, which itself communicates
by a pipe with a fan or other suitable exhausting apparatus, driven by any con-
venient power. Some or all of the horizontal suction pipes & described are provided
with an adjustable regulating valve ² and also with a sliding plate d³ which can be
raised or lowered and held in any desired position, by a bolt or pin which can
be fitted into any one of a series of holes 5 in the slide. By these means the size
of the admission opening into the suction pipes can be exactly adjusted.
The supply of the grain or material to be dried, to the upper part of the series of
heated pipes a is effected by means of a pipe or conductor e leading into one end
of a horizontal pipe or chamber f extending along the top of the apparatus, at a
sufficient distance above the highest pipes. This horizontal pipe f has an opening
or openings below, through which the grain is evenly delivered by menus of a screw
conveyor g in the pipe or chamber.
If too much grain or other material is supplied to the chamber f, it is discharged
through an overflow pipe g2 at the other end. After having passed in its descent over
the net of heated pipes a, the material passes out at the bottom, through a longitudinal
discharge opening the size of which can be regulated by a sliding board or plate i
which can be worked by a handle ³, rods 1, 2, and lever 1, from one end of the
apparatus, (Figures 1 and 2).
The lower edge of the slide is formed with a series of notches which can be arranged
either to correspond with similar openings in the discharge opening h, or so that the
latter are more or less closed.
For ensuring and regulating the regular discharge of the material, a constantly
revolving roller m is arranged outside the slide, under the lower side of which the
material passes, and is delivered by it into a trough or chamber n containing a screw
conveyor (similar to that in the upper part of the apparatus), by which the grain
or material is carried to the end of the trough and delivered through a pipe o to an
elevator p, q, by which the material is taken to a cooling chainber.
In the arrangement of the heating tubes described, the several tubes are at such a
distance apart and in such positions that a sufficient number of transverse vertical
strips or boards r can be fitted between them, these boards having semi-circular
recesses in their edges which fit round and embrace the pipes a (Figure 4), the
edges of the boards fitting against each other and against an outer wooden casing
which surrounds the entire apparatus at a sufficient distance, and is closed by a
cover, above which the upper screw conveyor is arranged.
The vertical boards which embrace the pipes, as well as the other parts, may be
held together by screws and bands 8, passing diagonally round the horizontal
pipes, of suitable form and arranged in the most convenient positions.

page_text: The outer vertical sets of horizontal pipes may have thin directing platest fitted
in suitable positions, so as to prevent the in iterial being scattered through the inclined
openings e in the sides of the casing b.
The screw conveyors, fan, and elevator, are driven by any convenient power.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:—
Drying kilns, in which the substances to be dried pass down between heated pipes
and are prevented from escaping laterally by a casing having openings through it
directed upward and outward, the kilns being applicable to drying grain by means of
exhausting pipes and openings arranged near the perforated casing, for the purpose of
carrying away the vapour given off, substantially as described and illustrated.
Dated this 6th day of October 1898.
EDWARDS AND CO.,
Chartered Patent Agents, 65 and 66, Chancery Lane, London,
Agents for the Applicant.