Improvements in Evaporating Brine and other Liquors, and Apparatus therefor.
Year: 1894

page_text: Date of Application, 15th Dec., 1.894
Complete Specification Left, 14th Sept., 1895-Accepted, 19th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in Evaporating Brine and other Liquors, and
Apparatus therefor.
I, ERNEST GEORGE SCOTT, of 67, Lord Street, Liverpool, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention.to be as
follows:-
My invention relates to the evaporation of brine and other liquors by the
method described in the Specification of Letters Patent No. 12774 of 1893, and
consisting in heating the liquor preparatory to its introduction into the evaporating
vessel.
As described in the said former Specification the heated liquor was introduced
into the evaporating vessel above the level of the liquid therein whereby it
rapidly lost its heat by coming directly under the action of the vacuum.
According to the present invention the hot liquor, instead of coming directly
into contact with the vacuum, is caused to give up part of its heat to the cooler
liquor already under the action of the vacuum, and is distributed over the whole
area of such liquor in fairly equal degree, thus causing a gentle or steady
evaporation instead of violent evaporation at points.
In carrying out my invention I find it advantageous to employ a shallow.
evaporating pan, preferably circular in shape, and to introduce the liquor coming
from the heater through a number of small pipes which are set round the pan at
the bottom thereof so that the liquor enters the pan at various points below the
level of the liquid already therein and so that a part of the heat of the incoming
Liquor is absorbed before it enters the pan.
Dated this 15th day of December 1894.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
Improvements in Evaporating Brine and other Liquors, and
Apparatus therefor.
I, ERNEST GEORGE SCOTT, of 67, Lord Street, Liverpool, in the County.of
Lancaster, 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 relates to the evaporation of brine and other liquors by the
method described in the Specification of Letters Patent No. 12774 of 1893, and
consisting in heating the liquor under pressure preparatory to its introduction into
the evaporating vessel.
As described in the said former Specification the heated liquor was introduced
into the evaporating vessel above the level of the liquid therein so that it rapidly
lost its heat by coming directly under the action of the vacuum whereby the salt
crystals precipitated were so small as to be of little commercial value.

page_text: Now the object of my improvements is to obtain large crystals, and for this
purpose the hot liquor, instead of coming directly into contact with the vacuum,
is caused to give up its heat to the cooler liquor already under the action of the
vacuum, and is distributed over the whole area of such liquor in fairly equal
degree, thus causing a gentle or steady evaporation instead of violent evaporation
at points.
In carrying out my invention I find it advantageous to employ a shallow
evaporating pan, preferably circular in shape, and to introduce the liquor coming
from the heater through a number of small pipes which are set round the pan or
near the bottom thereof so that the liquor enters the pan at various points below
the level of the liquid already therein.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawings, in which :—
Figure 1 is a sectional elevation of an evaporating apparatus constructed
according to my invention:
Figure 2 is a plan of the same.
h
a is the heater having vertical tubes 6, 6 through which the liquor passes, e being
the inlet for the liquor into the heater a and d the outlet for the same.
c' is the
inlet for the steam and d' the outlet for condensed water. e is the evaporating
pan which is preferably shallow and circular in shape as shewn and supported on
girders and standards g, g. The outlet pipe d from the heater a communicates
with a pipe running around the evaporating pan e from which a number of small
tubes i, i pass into the evaporating pan near the bottom of the same which tubes
are provided with cocks to regulate the outflow of liquor into the evaporating
pan so as to keep a pressure in the heater. j is the outlet pipe from the
evaporating pan to the vacuum pump, k is the salting valve or discharge outlet for
the salt crystals formed and is a pipe leading to the pump for circulating the
brine or other liquor.
m is an arm carrying scrapers n, n, the said arm being supported on a central shaft o
passing through the bottom of the evaporating pane and being actuated by suitable
gearing by means of one of the pulleys p, p.
The action of the apparatus is as follows:-The liquor after passing through the
heater a finds its way through the outlet pipe d into the circular pipe / from which
it passes into the bottom of the pan e through the small tubes i, i whereby it is
distributed evenly over the whole area of the liquor already under the action of the
vacuum, to which it is not exposed directly and the crystals formed are of such
size as to be of considerable commercial value.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improved process of evaporating brine or other liquor wherein the said
liquor instead of being led directly into a vacuum is caused to give up its heat to
the cooler liquor already under the action of the same, and is distributed over the
whole area of such liquor in fairly equal degrees, substantially as, and for the
purpose, specified.
2. The improved apparatus for evaporating brine and other liquors constructed
and arranged substantially as hereinbefore described and illustrated in the
accompanying drawings and operating as set forth.
Dated the 14th day of September 1895.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.