Improvements in the Manufacture of Salt from Brine and in Apparatus therefor.
Year: 1896

page_text: Date of Application, 23rd Oct., 1896
Complete Specification Left, 22nd July, 1897-Accepted, 4th Sept., 1897
PROVISIONAL SPECIFICATION.
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Salt from Brine and in
Apparatus therefor.
We, JOHN WESTON WESTON, of Thurcaston, King Charles Road, Surbiton, in the
County of Surrey, Salt Merchant, and THOMAS ILIFFE WESTON, of Wickham Lodge,
Wickham Bishops, in the County of Essex, Gentleman, do hereby declare the nature
of this invention to be as follows:-
The object of this invention is to obtain salt in peculiarly small bright and pure
crystals.
For this purpose brine as clean and pure as is readily procurable is spread in a thin
film over a surface and allowed to evaporate but not to dryness, the mother liquor
mixed with the crystals so produced being separated not by evaporation but by
mechanical means.
The apparatus we have devised for this purpose consists of a boiler of oval section
having in the lower part an internal furnace and flue and in the upper part a revolving
cylindrical or other surface only partially immersed in the brine. At the top is an
opening for the escape of steam and at the bottom are pockets to receive any salt that
may be produced elsewhere than on the revolving drum. As the cylinder revolves it
carries up on it a thin film of brine which partially evaporates, the crystals mixed with
mother liquor being removed at one side by an inclined scraper and led into pockets
at the side of the boiler. Some of the liquor overflows from the pockets back into the
boiler whilst the remainder with the crystals is from time to time drawn off from the
bottom of the pocket and taken to a centrifugal or other machine to separate the free
moisture. The crystals are afterwards dried in heated chambers.
Dated this 22nd day of October 1896.
JOHN W. WESTON.
THOS. I. WESTON.
Improvements in the Manufacture of Salt from Brine and in
Apparatus therefor.
We, JOHN WESTON WESTON, of Thurcaston, King Charles Road, Surbiton, in the
County of Surrey, Salt Merchant, and THOMAS ILIFFE WESTON, of Wickham Lodge,
[Price 8d1

page_text: Wickham Bishops, in the County of Essex, Gentleman, 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 :-
The object of this invention is to obtain salt in peculiarly small bright and pure
crystals.
For this purpose brine as clean and pure as is readily procurable is spread in a thin
film over a surface and allowed to evaporate but not to dryness, the mother liquor
mixed with the crystals so produced being separated not by evaporation but by
mechanical means.
The apparatus we have devised for this purpose is shown in the accompanying
drawings.
Figure 1 is a plan and Figure 2 a vertical central section the cylinder and flue
being broken away in these figures to shew the other parts.
Figure 3 is a horizontal section on the line 3-3 Figure 2 and Figures 4 and 5 are
vertical sections on the lines 4-4 and 5-5 Figures 1, 2 and 3.
The apparatus consists of a tank or boiler u open at the top, having vertical
sides a¹ a, vertical ends a³ and a bottom a which inclines downwards from the
side a¹ as is clearly shown in Figures 4 and 5 but does not extend to the side a the
space being occupied by two pockets each composed of vertical triangular sides as a
and inclined bottoms a7 a8. a are pipes closed by valves (not shown) leading out from
the lowest part of the pockets and serve to remove any crystals which may be formed
in the boiler. ao are stays supporting the bottom a*.
b is a hollow cylinder partly immersed in the liquid in the boiler a, it works in
bearings and is rotated in any convenient manner.
ccc are three pockets in the boiler each formed of triangular sides c¹ cand
inclined bottoms ee. The pockets care preferably made in one piece with horizontal
plates at about the level of the liquid in the boiler a brackets and baffle plates c'. c* is
a scraper fixed all along the top edges of the sides el just below the level of the liquid
in the boiler a and bearing against the cylinder b. c are pipes closed by valves (not
shown) lending out from the lowest parts of the pockets c.
d is the furnace grate, the products of combustion passing under the bottom of the
boiler back through the flue d¹ in the boiler and by the side flues de to the
chimney d. Part of the products of combustion are however led from the flue d' by
a small flue d' into a box d from whence they pass through holes b' into the
cylinder b so heating it escaping at the other end into the chimney.
As the cylinder & revolves it carries up on it a thin film of brine which partially
evaporates, the crystals mixed with another liquor being removed at one side by the
scraper and led into the pockets c at the side of the boiler a. Some of the liquor
overflows from the pockets back into the boiler whilst the remainder with the crystals
is from time to time drawn off from the bottom of the pocket and taken to a centrifugal
or other machine to separate the free moisture. The crystals are afterwards dried in
heated chambers.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
1. The manufacture of salt by evaporating but not to dryness a thin film of
brine and then separating the crystals from the mother liquor not by evaporation
but by mechanical means.
2. The combination of a surface on which the brine is evaporated and a scraper
immersed in the brine for removing the crystals from the surface.
3. The combination of a boiler, a rotating cylinder partly immersed in the
brine in the boiler, a scraper below the surface of the brine acting on the
cylinder, and a pocket in the boiler to receive the crystals:
4. The process of manufacturing salt, substantially as described.

page_text: 5. Apparatus for the manufacture of salt substantially as described and shown
in the drawings.
Loted this 10th day of Iul.. 1907
JOHN W. WESTON.
THOS. ILIFFE WESTON.