Improvements in Apparatus for Evaporating Saccharine or other Solutions or Liquids.
Year: 1891

page_text: Date of Application, 17th Dec., 1891
Complete Specification Left, 24th Aug., 1892-Accepted, 15th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Evaporating Saccharine or other
Solutions or Liquids.
I, Pierre LabÉRIE of 16 Rue Drouot, Paris, France, Engineer, do hereby
declare the nature of this invention to be as follows:-
My invention has reference to apparatus for evaporating saccharine or other
solutions or liquids and is characterized by the combination with an evaporating
vessel in which a vacuum can be produced or which is hermetically closed, of a
pipe for carrying away the vapors or products of evaporation and of a second pipe
surrounding or surrounded by the first, this second pipe being supplied with the
liquid to be evaporated, charged with air or gas. In its passage through this pipe
the liquid takes up heat from the products of evaporation contained in the other
pipe and it then passes on to the bottom of the evaporating vessel.
Having stated the chief characteristic feature of the invention I will proceed to
describe by way of example an apparatus for carrying the invention into effect.
The apparatus comprises a boiler or evaporating vessel having a hermetically
closing cover or dome. From the upper part of the vessel a pipe is led within
which is placed a second pipe for carrying off the vapors or evaporation products
to an exhauster or otherwise. The outer or inner pipes do not touch each other and
the outer contains the liquid to be evaporated which in its passage therethrough
takes up the heat which the vapors in the inner pipe part with and then flows thus
heated to the bottom of the vessel in a continuous stream. The outer or liquid
pipe is supplied with liquid through a syphon or S pipe the upper part of which is
filled with small tubes that allow the air contained in the liquid received in a funnel
above to be drawn by this liquid and to be capable of escaping by rising. The
liquid is supplied to the funnel by a bucket wheel which receives it from a feed pipe
fitted with a cock.
Instead of one outlet pipe for the vapors several small pipes may be placed within
the liquid inlet pipe so as to provide a greater heating surface. The vapor outlet
pipe or pipes and the liquid inlet pipe may have any sections and forms thought
best; they may be ellipsoidal, be bent back or doubled on themselves or be
bent into a spiral or serpentine so as to afford a very large surface in a limited
space.
If the presence of air is injurious to the liquids to be evaporated it can be replaced
by carbonic acid gas or other non-injurious gas.
Dated this 17th day of December 1891.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.
COMPLETE
SPECIFICATION.
Improvements in Apparatus for Evaporating Saccharine or other
Solutions or Liquids.
I, PIERRE LABÉRIE of 16 Rue Drouot, Paris, France, 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 has reference to apparatus for evaporating saccharine or other
solutions or liquids and is characterized by the combination with an evaporating.
vessel in which a vacuum can be produced or which is hermetically closed, of a

page_text: pipe for carrying away the vapors or products of evaporation and of a second pipe
surrounding, or surrounded by, the first, this second pipe being supplied with the
liquid to be evaporated, charged with air or gas. In its passage through this pipe
the liquid takes up heat from the products of evaporation contained in the other
pipe and it then passes on to the bottom of the evaporating vessel.
Having stated the chief characteristic feature of the invention I will proceed to
describe by way of example an apparatus for carrying the invention into effect.
Figure 1 of the accompanying drawings is an elevation of the apparatus.
Figure 2 illustrates a modification.
The apparatus comprises a boiler or evaporating vessel A. having a hermetically
closing cover or dome B. From the upper part of the vessel a pipe E is led
through an aperture or socket at C within which pipe is placed a second pipe D for
carrying off the vapors or evaporation products to an exhauster or otherwise. The
outer and inner pipes E and D do not touch each other and the pipe E contains the
liquid to be evaporated which in its passage therethrough takes up the heat which
the vapors in the inner pipe D part with and then flows thus heated to the bottom
of the vessel A in a continuous stream through the pipe G. The outer pipe E is
supplied with liquid through a syphon or S pipe F the upper part of which is filled
with small tubes F that allow the air contained in the liquid received in a
funnel above to be drawn by this liquid and to be capable of escaping by rising.
The liquid is supplied to the funnel by a bucket wheel II which receives it from a
feed pipe I fitted with a cock 1'. The wheel H in turning delivers the liquid to
the funnel F in broken quantities so that the air which enters the small tubes F
between two quantities of the liquid is caught by the next quantity and passes on
with the liquid.
Instead of one outlet pipe D for the vapors several small pipes may be placed
within the liquid inlet pipe E so as to provide a greater heating surface, and if it be
thought better in practice the apparatus can be arranged so that the vapors instead
of being surrounded by the incoming liquid shall surround it. The vapor outlet
pipe or pipes and the liquid inlet pipe may have any sections and forms thought
best; they may be ellipsoidal, be bent back or doubled on themselves or be
bent into a spiral or serpentine so as to afford a very large surface in a limited
space.
If the presence of air is injurious to the liquids to be evaporated it can be
replaced by carbonic acid gas or other non injurious gas. In this case the pipe F
can be led through a closed chamber supplied with the gas and have short branches
opening into the chamber, through which branches the gas will be drawn into
the pipe.
My invention can be applied to existing apparatus. Figure 2 illustrates its
application to an existing form of apparatus in which there is an aperture or pipe
socket C at the upper part.
My apparatus acts as follows:-In order to put it into work I first charge the
boiler or vessel A. to the lowest level with the liquid to be evaporated. As soon as
this liquid begins to boil I open the feed cock I'; the liquid from the supply
reservoir then flows on to the wheel H and then into the funnel F" and through the
pipes to the pipe F. During its travel it becomes charged with air and in this
condition it enters the pipe E in which, as it envelops the pipe D which is carrying
off the vapors, it takes up heat from these vapors; it reaches the pipe G in a
heated state and is conducted by it to the lower part of the vessel A into the
boiling liquid; it is evaporated in its turn and its vapors serve to heat further
ingoing liquid. I thus have continuous feed and evaporation of the liquid the
ingoing liquid taking up under the best conditions the heat of the vapors of the
liquid already evaporated. The concentrated liquid accumulates at the bottom of
the vessel A and when a given level has been reached a part of the liquid is
discharged by means of a cock fitted for the purpose, without interrupting the
working of the apparatus.
The apparatus can be usefully applied to the evaporation or distillation of sea

page_text: water or other waters that require to be purified because the vapors when condensed
form an aërated and wholesome water.
The vessel A can be heated by fire or by steam and will be fitted with all the
usual accessories such as pipes, cocks, manhole, inspection hole, &c.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is
-
1. In an apparatus for evaporating saccharine or other solutions or liquids, the
combination with an evaporating vessel in which a vacuum can be produced or
which is hermetically closed, of a pipe for continuously supplying the solution or
liquid to the said vessel, and of a pipe through which the vapors from the
evaporating liquid escape, one of these two pipes surrounding the other so that the
heat of the outgoing vapors is taken up by the ingoing liquid, substantially as set
forth.
2. The improved evaporating apparatus represented in the accompanying
drawings and hereinbefore described.
Dated this 23rd day of August 1892.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.