Improvements in Apparatus for Evaporating Brine and the like under a Vacuum.
Year: 1889

page_text: Date of Application, 2nd Sept., 1889
Complete Specification Left, 2nd June, 1890-Accepted, 5th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Evaporating Brine and the like
under a Vacuum.
I, WILLIAM YOUNG of Droitwich in the County of Worcester Salt Works Manager
do hereby declare the nature of this invention to be as follows:-
According to this invention I employ a closed vessel into which the brine or salt
solution is fed and by the application of heat formed into crystals which by a rotatory
stirring appliance are conveyed to a chamber or chambers provided with a well fitting
door or doors for periodical removal. The vapours or steam produced are by a larga
pipe or pipes from the top of the vessel carried off to a condenser, in connection
with an air pump for producing and maintaining a suitable vacuum in the boiling
vessel.
In one arrangement the boiling vessel is made with a flat bottom or nearly so.
cylindrical sides rising vertically therefrom and a domed or tapering top. A vertical
shaft passes into the vessel from the top through a stuffing box and works in a step
bearing below, where it is provided with raking arms. These serve to rake the salt
crystals out into one or more lateral pockets or chambers provided with well-fitting
doors for periodical removal of the salt. The vessel is heated from underneath by a
coal or gas fire with suitable flues, or by steam in a jacket surrounding the lower part
of the boiling vessel. The steam is taken off in one or more places at the top by a
pipe leading up to a condenser in connection with an air pump.
In another form I make the boiling vessel of a cylindrical horizontal form like au
egg ended boiler from which the steam is led away by one or more connections to a
pipe leading to a condenser and air pump. A horizontal spindle is mounted by
preference a little below the central axis of the boiler passing out through stuffing
box and by suitable gear caused to rotate slowly. This spindle is provided with
helically set raking arms or a continuous screw whereby the salt deposited is slowly
raked to the back end of the boiler and into a pocket or outlet shoot provided with
tightly fitting door for periodical removal of the salt. The boiler may be heated by
coal or gas fire or by steam jacket.
The boilers are provided with suitable gauge glass, sight hole, vacuum gauge,
thermometer brine inlet regulating valve or cock and brine outlet cock or valve.
1000
JENSEN & SON,
77, Chancery Lane, Loudon, W.C., Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Evaporating Brine and the like
under a Vacuum.
I, WILLIAN YOUNG of Dreitwich, in the County of Worcester, Salt Works
Manager 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 :-
According to this invention I employ an airtight vessel into which the brine or
solution is fed, and by the application of heat, the water is evaporated and salt
deposited, which by a rotary stirring appliance is conveyed to a chamber or chambers
provided with a well fitting-door or doors for periodical removal. The vapours or
steain produced are, by a large pipe or pipes from the top of the vessel, carried off to
a coudenser, in connection with an air pump for producing and maintaining a suitable
vacuum in the boiling vessel.

page_text: In one arrangement the evaporating vessel is made with a flat bottom or nearly so,
cylindrical sides rising vertically therefrom and a domed or tapering top.
Figure 1 is a part sectional elevation, and Figure 2 a plan of such a form of vessel.
A vertical shaft A passes into the vessel B from the top through a stuffing box C,
and works in a step bearing D below, where it is provided with raking arms E. These
serve to rake the salt out into one or more lateral pockets or chambers F provided
with well fitting doors G for periodical removal of the salt. These doors are each
provided with rubber joint packing and held tight by two cross bars G' with
screws G². The vessel is heated from underneath by a coal or gas fire with suitable
flues, say a flue passing under the central part of the vessel, and two lateral return
flues or by steam in a jacket surrounding the lower part of the vessel. The steam
from the brine is taken up in one or more places at the top by a pipe L leading up to
a condenser in connection with an air pump, said pipe being provided with a stop
valve which is closed when the salt is removed.
In another form, I make the evaporating vessel B, as shewn in the sectional
elevation, Figure 3 and end view Figure 4 of a cylindrical horizontal form like an
egg ended boiler, from which the steam is led away by one or more connections to a
pipe of ample dimensiors leading to a condenser and air pump. A horizontal
spindle is mounted, by preference a little below the central axis of the vessel passing
out through stuffing box and by suitable gear caused to rotate slowly.
This spindle is provided with helically set raking arms, or a continuous screw E,
whereby the salt deposited is slowly raked to the back end of the vessel, and into a
pocket or outlet shoot F provided with tightly fitting door & for periodical removal
of the salt, and a sluice valve H, which is closed whenever the salt is removed from
the pocket, thus permitting continuous action in the boiler, the valve being opened
again when the door G is again fastened. The door or lid G is provided with rubber
joint packing, and held tight by two cross bars G1 with screws G. The versel may
be heated by coal fire, as shewn, or by gas fire or by steam jacket.
The vessels B are provided with suitable gauge glass, sight hole, vacuum gauge,
thermometer, and brine inlet regulating valve or cock M. The brine may be removed
as required from the pockets F, by syphon as is well known.
Having now particularly described and ascertained the rature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
Firet. An evaporating vessel B with flat bottom or nearly so, cylindrical sides
and domed or tapering top, with lateral salt collecting pockets, having tight fitting
doors for removal of the salt, and provided with vertical rotatable spindle passing
out through a stuffing-box at the top of the vessel and fitted with raker appliance,
the vessel being by a pipe or pipes connected with a condenser and air pump, and
provided with stop valve for the purpose of evaporating brine and the like under
vacuum substantially as described and as shewn on the drawing.
Second. An evaporating vessel B of cylindrical horizontal form at one end
provided with salt collecting pocket, having a well fitting door and a sluice valve
for permitting the removal of the salt, without interrupting the evaporating process,
the vessel being provided with horizontal rotatable spindle passing out through a
stuffing box at one end, and fitted with screw raker appliance, and by a pipe or
pipes connected with a condenser and air pump for the purpose of evaporating
brine and the like under vacuum, substantially as described and as shewn on the
drawing.
Dated this 2nd day of June 1800
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.