An Improved Evaporating or Vacuum Apparatus for the Granulation of Crystallisable Liquids.
Year: 1896

page_text: Date of Application, 3rd Dec., 1896-Accepted, 10th July, 1897
COMPLETE SPECIFICATION.
An Improved Evaporating or Vacuum Apparatus for the Granulation
of Crystallisable Liquids.
I, JAN GROSSE, of No. 15 Proresnaja, Kiew, Russia, 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 consists of an improved apparatus, which is designed for the pur-
pose of carrying out a process of my invention that has for its object to promote
the crystallisation of impure or difficultly crystalling liquids, and in particular, of
the residual products of sugar factories, and my present invention has for its object
to render said process highly efficient as regards output. This object is effected
by constructing the apparatus in such a manner as to produce a high head or
column of liquid in which a considerable difference of temperature obtains in the
upper and lower parts of the solution, the arrangement being such that the movable
helical parts which are arranged in the wide delivery pipe within the apparatus
operate to convey the solution from its lower and hotter portions up into the
upper and colder portions of the same. By this means an evaporative and a cooling
action is produced which operates to considerably accelerate crystallisation.
The new apparatus is illustrated in Figures 1 to 3 of the accompanying drawings
in which
Figure 1 is a vertical section,
Figure 2 a plan, and
Figure 3 a front elevation thereof.
The upright cylinder A terminates at its lower part in a cone B which may be
provided with a jacket C, for the purpose of enabling the solution to be heated by
its means according to requirement during the process of crystallisation. Should
the lower double bottom not transmit sufficient heat, there may be provided a
heating coil or worm D: but any other tubular arrangement might be equally
well employed.
Inside the apparatus there is arranged a wide delivery pipe E within which is
situated and rotates a shaft F centrally disposed and mounted in a collar bearing G
and driven by means of countershaft H gear and belt pulleys T. Upon this shaft F
there are mounted one or more helical blades or vanes K K K which are arranged
at certain intervals according to the height of the apparatus.
The shaft carries at its lower extremity a pair of vanes L which serve for the
purpose of keeping the bottom clean.
A valve M serves for the admission of the solution to be crystallised.
A valve and bent pipe or elbow N serve for establishing connection with the
condenser or the air pump.
A valve O and union piece P serve for the admission of steam into the heating
coil and the heating jacket.
Q and R are steam return pipe unions from the heating coil and the heating
jacket.
P is the vacuum gauge.
T and T are thermometers.

page_text: Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is :-
(1). In an evaporating or vacuum apparatus for promoting crystallisation, the
provision of a conveyor substantially as and for the purpose hereinbefore described.
(2). An evaporating or vacuum apparatus for promoting crystallisation, char
acterised by its vertical or upright position and the internal delivery pipe or tube,
with parts of helical screw or worm vanes or blades or ships screw propeller blades,
rotating on a vertical shaft in said delivery pipe for the purpose of conveying the
solution to be crystallised which is heated by means of any suitable heating device,
from the lower and hotter parts, into the upper and cooler parts of said solution,
substantially as described.
Dated this 2nd day of December 1896.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.