Improvements in Apparatus for Evaporating the Juice of Beetroot, Sugar Cane, and other Juices or Liquids.
Year: 1886

page_text: Date of Application, 26th Aug., 1886.
Complete Left, 13th Apr., 1887.
Complete Accepted, 13th May, 1887.
Improvements in Apparatus for Evaporating the Juice of Beetroot,
Sugar Cane, and other Juices or Liquids.
I PIERRE LABÉRIE, of 1 Boulevard Saint-Denis, Paris, France, Civil Engincor
do hereby declare the nature of said Invention to be as follows :-
My Invention has for its object the rapid and economical evaporation of the juice
of beetroot, sugar cane, &c., and other juices or liquids, to be concentrated, by the
arrangement, in a vacuum apparatus, of a pipe conducting hot air into the liquid to
be evaporated, contained in the said apparatus, and which air drawn in by the action
of an aspirator communicating with a tube raises, agitates, and aerates the liquid by
passing through it and carries away with it the vapours of the liquid.
The apparatus consists of a boiler having at top a hermetically closed lid or dome ;
of a pipe or tube communicating with an aspirator or suction apparatus, of any
suitable system, and of a pipe for introducing hot air into the bottom part of the
boiler which contains the liquid to be evaporated. The outlet of this pipe through
which the air escapes may be bell mouthed, or may be divided into several branches,
perforated, for the better distribution of the air through the liquid. Air may be
taken either from the inside or from the outside of the building. To heat it, the
waste heat from the flues, and the chimney of the steam engine may be utilized, by
arranging for this purpose, a conduit which communicates with the above said air
pipe or the air may be directly heated by means of a furnace. To avoid the
introduction of dust or impurities the air may pass through layers of cotton.
A blower may be established upon the air pipe to assist, in case of need, the action
of the aspirator.
The boiler may be heated by an open fire or by steam, and it may be provided
with all the necessary fittings which are usually applied to apparatus for producing
a vacuum, such as man-holes, sight-holes, cocks, pipes, thermometers, baronieters, &c.
My Invention may be applied to any of the existing apparatus for producing a
vacuum, whatever may be their form.
201 1
1000

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Evaporating the Juice of Beetroot,
Sugar Cane, and other Juices or Liquids.
I, PIERRE LABÉRIE, of 1 Poulovard Saint-Denis, Paris, France, Civil 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, reference being had to the accompanying drawings, and to the letters and
figures marked thereon, that is to say :—
My Invention has for its object the rapid and economical evaporation of the juice of
sugar cane, beetroot and of other juices and liquids which require to be concentrated,
by arranging within an apparatus A. for forming a vacuum, a pipe D conveying heated
air into the liquid which is being evaporated, such air being drawn into an aspirator
communicating with the tube C, so as to stir, agitate and aerate the liquid while
passing through the same and to carry away with it the vapours formed by the said
fiquid.
This invention consists of a boiler A surmounted by a cover, lid or dome, which
closes it hermetically, and of a tubo communicating with any suitable aspirator such
as a pump, an apparatus provided with stirrers, or helicoidal blades or the like. E is
a condenser to the bottom of which falls, by reason of its own gravity, the sugar which
was liable to have been carried away by the air or vapours. El is a pipe provided
with a cock serving to return to the vessel A the sugar fallen in E. C¹ is a pipe
conveying the air and the vapours from the condenser E to the aspirator. F is a
sleeve or sheath enclosing the pipe filled and fed with the liquid requiring to be
evaporated and proceeding from a reservoir. During its course the liquid becomes
heated while the pipe C is cooled, the said liquid being discharged through the pipe F
and falling in the form of spray in the pipe D. The continuous feeding of the liquid is
regulated by means of the cock F".
D is a pipe conveying to the bottom of the vessel A, the heated air simultaneously
with the liquid supplied by the pipe F¹. The outlet mouth of this pipe through
which the air oscapes may be bell inouthed or. may be divided into several branches
provided with small perforations for the better distribution of the air throughout the
liquid. The air supplied may be obtained from within the building, or. from outside,
and may be heated either by utilizing the waste heat from the chimney and from the
firo tubes of the steam boiler, or by means af a fire-place traversed by the pipe D. In
order to obviate the entrance of dust or of impurities, the air may be purified by being
passed through a layer of cotton, or of any other suitable material.
An additional fan or ventilator may be arranged upon the pipe D, beyond
the point where the pipe F¹ terminates, in order to remedy, if necessary, the
insufficiency of the aspirator by relieving the same. The apparatus A may be heated
by means of an open fire, or by means of steam, and it may further be provided with
all the fittings usually applied to apparatus destined to form a vacuum, such as
manholes, false bottoms, pipes, cocks, gauges, thermometers and the like. My

page_text: invention may be applied to 'apparatus hitherto constructed for forming a vacuum
their shape being a matter of very little importance.
Working. The apparatus A having been fed with the liquid requiring to be
evaporated, and the latter having been sufficiently heated, the aspirator is started.
The heated air conveyed by the pipe D is exhausted by the aspirator, meets the liquid
falling in the form of spray from the pipe F, and both are carried to the bottom of tho
vessel A, the air escaping rapidly through the outlet mouth of the pipe D and suc-
cessively ascending through the liquid which is thus agitated and aerated. This air now
forces through the tube C the vapours formed by the liquid and passes with them through
the condenser E, where they are freed from the particles of sugar carried along with
them, being further conveyed through the pipe C where they yield their heat to the
liquid contained in the sleeve F and are finally conducted to the aspirator where they
are capsulated or enclosed. The pipe C¹ may be divided into several parallel branches,
or into branches of elliptical sectional form, so as to present as large a surface as
possible to the liquid. As water deprived of air cannot be made to attain a state of
ebullition at any temperature, and as ebullition can be attained, more or less quickly,
according as the water contains more or less air, I have combined, by means of my
invention, the aeration of juices to be evaporated, with the exhaustion of the vapours
formed, in order to obtain a rapid evaporation at a low temperature.
.
Having now described my Invention, and in what manner the same is to be
performed, I declare that I claim
-
The arrangement of the pipe D conveying hot air and the liquid to be evaporated
into an apparatus A for establishing a vacuum, in combination with an aspirator
communicating with the tube C, for the purpose of carrying away the air exhausted
and the vapours formed, substantially as hereinbefore described.
Dated this 13th day of April 1887.