Apparatus for Driving Off Heavy Vapours of Solvents.
Year: 1893

page_text: Date of Application, 8th Mar., 1893
Complete Specification Left, 5th Dec., 1893-Accepted, 20th Jan., 1894
PROVISIONAL SPECIFICATION.
Apparatus for Driving Off Heavy Vapours of Solvents.
We, THE PARENT SYNDICATE LIGHTNING OIL EXTRACTOR COMPANY
LIMITED, and HENRY ATHELSTAN ACWORTH DOMBRAIN, Engineer, all of
No. 27 Kirkgate, Bradford, in the County of York, do hereby declare the nature
of this invention to be as follows:-
This invention relates to apparatus for driving off from materials to which
volatile solvents have been applied, the heavy vapours of these solvents. For this
purpose, the material containing the solvent is fed into the lower part of an inclined
trough which is heated by hot water or steam circulating through a jacket
extending under the trough and partly up its sides. This trough is situated within
a larger trough extending under and at each side of the heated trough and covered
by thin sheet metal along its whole length. In the interior heated trough are
mounted two parallel worm conveyors, oppositely threaded, by the rotation of
which the material is caused to travel up the slope of the trough to the upper end
whence it is discharged. As the material thus travels along the heated trough,
the solvent is evaporated from it, and the vapour, which is heavier than air, flows
over the edges of the heated trough into the outer trough where it is partly con-
densed. The condensed fluid along with such of the vapour as remains uncondensed,
descends several pipes into a conduit below.
This conduit being slightly inclined, the fluid and vapour flow along it, farther
condensation taking place, to a condenser where the rest of the solvent vapour is
condensed.
Dated this 8th day of March 1893.
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Apparatus for Driving Off Heavy Vapours of Solvents.
We, THE PARENT SYNDICATE LIGHTNING OIL EXTRACTOR COMPANY
LIMITED, and HENRY ATHELSTAN ACWORTH DOMBRAIN, Engineer, all of
No. 27 Kirkgate, Bradford, in the County of York, 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 driving off from materials to which
volatile solvents have been applied, the heavy vapours of these solvents.
Fig. 1 of the accompanying drawings is a longitudinal section and Fig. 2 is a
transverse section of apparatus according to this invention.
The material containing the solvent is fed through an opening A into the lower
part of an inclined trough B which is heated by hot water or steam circulating
through a jacket extending under the trough. This trough is situated within a
larger trough C extending under and at each side of the heated trough and covered
by thin sheet metal D along its whole length. In the interior heated trough B
are mounted two parallel worm conveyors E, oppositely threaded, which are caused
to rotate by worm or other suitable gear F. The material is caused by their
rotation to travel up the slope of the trough B to its open upper end; whence it is
discharged.

page_text: As the material thus travels along the heated trough, the solvent is evaporated
from it, and the vapour, which is heavier than air, flows over the edges of the
trough B into the outer trough C whence it descends by several pipes G into a
cooled conduit H below, where it is mostly condensed. This conduit being slightly
inclined, the fluid and vapour flow along it, condensation taking place, to an
outlet K, and thence to a condenser where the rest of the solvent vapour is
condensed.
In order to allow for expansion and contraction of the heated trough B, it is
preferably made in parts as shewn in Fig. 1 having between them narrow spaces
which may be covered by pieces of sheet metal to prevent the material passing
down. The conduit H may be a simple pipe or, as shewn in the drawing, it may
be an annular conduit with a pipe coil arranged in the annulus for circulation of
cooling water; instead of a coil, the cooling pipes might extend longitudinally
along the annulus.
Instead of employing a separate conduit H and pipes G, the outer trough C
might be deepened and provided with cooling pipes in its lower part.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
Apparatus for driving off heavy vapours of solvents from materials treated with
them by causing the materials to travel along an inclined heated trough within a
covered outer trough provided with suitable pipes or conduits for condensation and
removal of the vapours, as they are driven off, substantially as described.
Dated this 5th day of December 1893.
ABEL & IMRAY,
Agents for the Applicants.