Improvements in Apparatus for Drying Solid Materials.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Drying Solid Materials.
I, WILLIAM OLIPHANT of 23 Clifford Street, Glasgow, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in apparatus for drying solid material
and is more particularly applicable for drying solid material contained in sewage.
In carrying out my invention I propose to utilize the heated gases from the
combustion chamber of the boilers which usually escape up the chimney. I provide
a chamber containing a number of perforated trays placed one above the other.
These trays are inclined to the horizon alternately in opposite directions and
are kept oscillating from side to side or up and down by means of a revolving shaft
and cams. This chamber is connected by a flue or flues with the combustion
chamber and drop flues, for taking smoke from the boilers, and blowers are
provided for forcing the hot air, gases and smoke into this chamber. The solid
material to be dried is allowed to fall on the top perforated tray and the motion of
the tray causes the solid material to travel along the tray. When it reaches the end
of the first tray it falls on to the second, travels along it and then falls on to the
third and so on. From the last tray the dried solid material falls into buckets or
bags to be packed up for removal.
Dated this 22nd day of July 1896.
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicant's Agents.
I, WILLIAM OLIPHANT, of 23, Clifford Street, in the County of the City of
Glasgow, North Britain, Engineer, 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 :-
My invention relates to improvements in apparatus for drying solid materials
and is more particularly applicable for drying solid material contained in sewage.
In order that my invention may be properly understood and readily carried into
effect, I have hereunto appended a general view partly in section and partly in
elevation of the apparatus of which Figure 1 shows the upper portion and Figure 2
the lower.
In carrying out my invention I utilize the heated gases from the combustion
chamber of the boiler which usually escape up the chimney. I provide a chamber A
containing a number of perforated trays B (the perforations in the upper tray
being the largest and diminishing towards the bottom) placed one above the other
and suspended by means of the wires or rods C or other convenient method.
These trays B are inclined to the horizon alternately in opposite directions as shown

page_text: and are kept oscillating from side to side or up and down by means of revolving
shafts D and cams or eccentrics E, having wires or rods F leading to and connected
with the trays B. The shafts D are set in motion by a counter-shaft D' driven
from the main shaft. This chamber A is connected by a passage or passages G
with the flue H leading from the combustion chamber H, and blowers I are provided
for forcing the hot air, gases and smoke into this flue H. The passages G are
provided with dampers S for regulating the heat in the chamber A. The hot air
from the chamber A escapes at the opening at the top. The hot air may be forced
through the blowers 1, or it may pass direct from the combustion chamber to the
flue H. In the latter case the damper U is opened. A similar damper U' is also
provided at the upper end of the combustion chamber which is also capable of
regulating the beat in the chamber A.
The method of drying the solid material is as follows:-
It is raised by the elevator K and passes down the shoot L and then between
the rollers M which assists integration. It is then allowed to fall on the top
perforated tray B and the motion of the tray causes the material to pass through
the perforations and down on to the next tray, and so on till it reaches the last
tray when it, by this time being thoroughly dried, falls through a hopper O into
buckets or bags P to be packed up for removal. The solid material, which has
not been able to pass through the perforations, travels along the first tray and
when it reaches the end of it, it falls through the shoot N on to the second tray,
travels along it and then through a corresponding shoot on to the third tray, and
From the last tray it falls through the shoot Q and into a breaker R,
when it is again passed through the chamber A for further treatment.
In some cases it may be necessary to have an auxiliary furnace W as shewn in
Figure 2 to superhcat, or as a substitute for the flue and combustion chamber
hereinbefore described.
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
The apparatus for drying solid material constructed substantially as described
and illustrated on the accompanying sheets of drawings.
Dated this 22nd day of April 1897.
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicant's Patent Agents.