An Improved Method of and Apparatus for Treating Brine in the Manufacture of Salt.
Year: 1895

page_text: Date of Application, 27th Apr., 1895
Complete Specification Left, 25th Jan., 1896-Accepted, 7th Mar., 1898
PROVISIONAL SPECIFICATION.
An Improved Method of and Apparatus for Treating Brine in the
Manufacture of Salt.
I, JOHN TODD, of Andreas, Isle of Man, Civil Engineer, do hereby declare
the nature of this invention to be as follows :-
At present in the manufacture of salt it is usual to allow the products of
combustion from the heating furnace under the salt pan to escape direct into the
chimney at a temperature of from 500° to 700° Fahrenheit.
Under my invention, however, this waste heat is utilized for warming the brine
before it passes into the pan thereby economizing fuel and improving the quality
of the salt.
In carrying out my invention I fit in connection with the salt pan a, preferably,
vertical boiler having one or more tubes in it which communicate with the furnace
flue, and through which the products of combustion pass on their way to the
chimney. This boiler which is closed air tight is egg ended at the upper end and
has a space at the lower end for salt crystals to accumulate.
Brine flows into the boiler at the top from a suitably situated
means of a pipe connection having a self regulating valve thereon.
the boiler is at some distance above its bottom and through it the
delivered direct to the salt pan.
•
storage tank by
The outlet from
heated brine is
With this arrangement the heat which is at present wasted is utilized to heat up
the brine in the boiler before it is allowed to flow into the pan.
Heating the brine purifies it thereby improving the quality of the salt.
Owing to the peculiar construction of the boiler and to the fact that it is closed
air tight the brine in it can be heated up above the temperature necessary to form
crystals in an open pan, so that, when the brine flows into the open salt pan the
crystals will at once form.
Dated this 26th day of April 1805
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.
COMPLETE SPECIFICATION.
An Improved Method of and Apparatus for Treating Brine in the
Manufacture of Salt.
I, JOHN TODD, of Andreas, Isle of Man, 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:
At present in the manufacture of salt it. is usual to allow the products of
combustion from the beating furnace under the salt pan to escape direct into the
chimney at a temperature of from 500° to 700° Fahrenheit.
Under my invention, however, this waste heat is utilized in a special manner for
heating the brine before it passes into the pan thereby economizing fuel and
improving the quality of the salt.

page_text: And in order that my said invention may be properly understood I have here-
unto appended an explanatory sheet of drawings, whereon,
Fig. 1 is a vertical section of the apparatus and Fig. 2 is a part sectional plan on
the line - Fig. 1.
In carrying out my invention I fit in connection with the salt pan a, preferably
vertical, boiler A having one or more tubes B in it which communicate with the
furnace fine C and through which the hot products of combustion pass on their way
to the chimney D. This boiler, which is closed air tight by the top plate A, is
egg ended or conical at the upper end and has a space at the lower end, below
the level of the pipe 1, for impurities to accumulate. These impurities can be
drawn off before they become solidified by means of a tap E fitted in the manhole
door F at the bottom of the boiler.
Brine flows into the boiler A at the top by means of a pipe H from a suitably
situated storage tank G arranged above the level of the top of the boiler so as to
keep it constantly filled. The outlet pipe I from the boiler is at some distance
above its bottom and through it the heated brine is delivered direct to the salt pan.
By means of the tap O on the pipe H the brine from the tank may or may not, as
desired, be allowed to flow into the boiler during the time the brine from the latter
is being drawn off into the pan.
On the drawings I have shown the boiler A as fitted with three heating tubes B
although more may be used. J is a door for the purpose of cleaning the tubes B.
K is a furnace flue damper door for regulating the temperature of the brine in 'the
boiler.
M is a pipe from the brine pump of the salt pit or work to the storage tank.
As salt crystals form on the surface of the brine I have made the boiler of a
conical shape at the top so that when it is kept full there is practically no brine
surface for the crystals to form on.
Owing to the peculiar construction of the boiler and to the fact that it is closed
air tight the brine in it can be heated up above the temperature necessary to form
crystals in an open pan or cistern, so that, when the purified brine flows into the
open salt pan N the salt crystals will at once form.
The heating of the brine in the boiler purifies it thereby improving the quality
of the salt.
If desired a safety valve arrangement can be fitted on the boiler.
I am aware that it has heretofore been proposed to utilize the waste heat from
the flue of the ordinary salt pan to heat brine in an open cistern.
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
consider novel and desire to claim is :-
1. The general arrangement and combination of parts of the apparatus for
treating brine in the manufacture of salt, substantially as hereinbefore described and
shown on the drawings annexed.
2. The application and use of a closed boiler, such as A, for heating and purifying
the brine before it passes to the open salt pan, substantially as hereinbefore described
with reference to the drawings annexed.
Dated this 24th day of January 1896.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.