Improved Vacuum Evaporating Apparatus for Separating Salt from Solutions, especially from Brine.
Year: 1899

page_text: Date of Application, 28th Dec., 1899
Comolete Specification Left, 10th Apr., 1900- Accepted, 28th Dec., 1900
PROVISIONAL SPECIFICATION.
Improved Vacuum Evaporating Apparatus for Separating Salt from
Solutions, especially from Brine.
I, GERHARD NICOLAAS VIS, of Schweizerhalle, near Basel, Switzerland, Doctor
of Philosophy and Chemist, do hereby declare the nature of this invention to be
as follows:
The present invention relates to the vacuum evaporating apparatus for salt
solutions described in the Application for British Patent No. 10738 of the 17th
August 1899, and consists in an improvement on the device for maintaining
constant the level of the brine in the other boilers of the series, while the air cock
of one boiler is opened for the discharge of the salt.
According to the said patent, this apparatus comprises for each boiler a pipe
which descends into the brine reservoir from the boiler, starting from a point
above the normal level of the brine and having its lower sloping end immersed
in the brine of the reservoir which under normal working conditions
forms a seal for said pipes. This arrangement, however, 18 found to
possess the drawback that these pipes, called the equalizing pipes,"
consequence of air passing through them so frequently, are apt to become
blocked up by incrustations of salt after a short service.
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In order to obviate this defect, the present improvement has been devised
which consists in combining with the equalizing pipes separate vessels filled with
a liquid which will not form incrustations, such as pure water, glycerine, oil,
quicksilver and the like, and moreover, in the insertion of an apparatus near the
upper end of the equalizing pipe, in order to intercept any liquid which may rise
too high or is carried over by the air; this apparatus may for instance consist of
a cylindrical or box-shaped vessel having baffle plates so placed that the air is
caused to pass in a zig-zag way in contact with said plates.
Dated the 28th day of December 1899
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.
Improved Vacuum Evaporating Apparatus for Separating Salt from
Solutions, especially from Brine.
I, GERHARD NICOLAAS VIS, of Schweizerhalle, near Basel, Switzerland, Doctor
of Philosophy and Chemist, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
The present invention relates to the vacuum evaporating apparatus for salt
solutions described in the Application for British Patent No. 16738 of the 17th
of August 1899, and consists in an improvement on the device for maintaining
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page_text: constant the level of the brine in the other boilers of the series, whilst the air cock
of one boiler is opened for the discharge of the salt.
514
According to the said patent, this apparatus comprises for each boiler a pipe
which descends into the brine reservoir from the boiler, starting from a point
above the normal level of the brine and having its lower sloping end immersed in
the brine of the reservoir which under normal working condition forms a seal for
the said pipes. This arrangement, however, is found to possess the drawback
that these pipes, called the equalizing pipes" in consequence of air passing
through them so frequently, are apt to become blocked up by incrustations of salt
after a short service.
66
In order to obviate this defect. the present improvement has been devised
which consists in combining with the equalizing pipes separate vessels filled with
a liquid which will not form incrustations, such as pure water, glycerine, oil,
quicksilver and the like, and, moreover, in the insertion of an apparatus near the
upper end of the equalizing pipe, in order to intercept any liquid which may rise
too high or is carried over by the air; this apparatus may for instance consist of:
cylindrical or box-shaped vessel having baffle-plates so placed that the air is!
caused to pass in a zig-zag way in contact with said plates.
On the annexed sheet of drawings:
Figure 1 is an elevation partly in section.
Figure 2 is a section of a modification of the vessel 12.
A is the boiler having the tubular prolongation C which dips into the brine
reservoir D open to the atmosphere; 1 is the equalising pipe connecting above
into the domed cover of the vessel and dipping below with its sloped end into the.
vessel 1 which is open to the atmosphere and contains a non-incrusting liquid; in
this pipe 1 at the ton is inserted a vessel 12 having baffle-plates 13 which in
Figure 1 are arranged horizontally and in Figure 2 inclined towards one another.
The vessel may be replaced by any other apparatus serving the same object, and
the pipe 1 may be inclined instead of rising vertically.
The capacity of the vessel 11 should be such that the vessel 12 can fill from the
vessel 11 with liquor through pipe 1 up to about one half of its height, or in other
words, that the column of liquid then contained in said pipe and vessel can be
received in the vessel 11 when the boiler is set under atmospheric pressure. For
inst. if the boiler contains, when under perfect vacuum, a column of brine.
of 8.3 metres height (spec. gr. of brine = 1.2) and the vessel 12 has a. height
of 1 metre and is constructed with a diameter of 1 m., the pipe 1 is constructed
with a diameter of 0.15 metre, and the distance between the horizontal-median
plan of vessel 12 and the uppermost point of the lower end of pipe 1 is 10 metres,
the vessel 11 should have a capacity of about 0.6 cubic metres.
f is the pine for periodically supplying the boiler from above the heating
system with fresh brine in order to remove incrustations as described in my
said patent.
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:
"
The described improvement in vacuum evaporating apparatus for salt solutions
such as set forth in Patent No. 16738 of 1899 according to which the equalising
pipe instead of dipping into the brine of the brine reservoir, is plunged into a
special vessel containing a non-incrusting liquid and communicates with the
boiler through a device for preventing overflow of the liquid into the boiler, sub-
stantially as and for the purpose stated.
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the. Applicants.