IMPROVED EVAPORATING OR RECOVERING FURNACE OR APPARATUS TO BE USED FOR EVAPORATING THE WATER IN SODA LYE OR LIQUIDS CONTAINING ANY VALUABLE SEDIMENT OR BODY, SO THAT THE SAME MAY BE RENDERED FIT FOR BEING AGAIN USED FOR MANUFACTURING PURPOSES
Year: 1873

page_text: LETTERS PÅTENT to Charles Stevenson, of Milngavie, in the County of
Stirling, North Britain, for the Invention of "IMPROVED EVAPORATING
OR RECOVERING FURNACE OR APPARATUS TO BE USED FOR EVAPORATING THE
WATER IN SODA LYE OR LIQUIDS CONTAINING ANY VALUABLE SEDIMENT OR
BODY, SO THAT THE SAME MAY BE RENDERED FIT FOR BEING AGAIN USED FOR
MANUFACTURING PURPOSES."
Sealed the 3rd March 1874, and dated the 25th October 1873.
PROVISIONAL SPECIFICATION left by the said Charles Stevenson at
the Office of the Commissioners of Patents, with his Petition, on
the 25th October 1873.
I, CHARLES STEVENSON, of Milngavie, in the County of Stirling,
5 North Britain, do hereby declare the nature of the said Invention for
"IMPROVED EVAPORATING OR RECOVERING FURNACE, OR APPARATUS TO BE USED FOR
EVAPORATING THE WATER IN SODA LYE OR LIQUIDS CONTAINING ANY VALUABLE
1...

page_text: SEDIMENT OR BODY, SO THAT THE SAME MAY BE RENDERED FIT FOR BEING AGAIN
USED FOR MANUFACTURING PURPOSES," to be as follows:-
This Invention relates to distributing to the action of fire and heat
the soda lye or liquid by means of perforated trays, slits, rose pipes, or
whatever may best distribute or break up the said liquid into rain drops
or spray, same to be placed in position as found necessary, the soda lye
being allowed to perculate the said trays or slits or pipes by its own
gravity; and also forcing the liquid through said perforations by means
of a force pump, reserving the right to force in longitudinally by force
pump a spray of soda lye or liquid over the flame, all for the purpose of
breaking up the liquid and exposing it to the full action of the flame as
afterwards described.
Likewise this Invention relates to the use of agitators in the furnace
for the purpose of stirring up the sediment or ash which will fall from
the evaporated lye or liquid so as to expose more fully any moisture
which may still remain in the sediment whatever it may be, and at the
same time serving the purpose of a scraper in drawing forward to a
bench formed in the furnace the recovered sediment or ash.
.
As instancing means whereby I carry into effect my said Invention I
will describe a furnace in detail:-The furnace at sides and ends is
built of fire-bricks, and consists of a fire-place at one end, the length of
furnace is determined by the evaporating capacity required, the lead or
flue is formed by a cast-iron cistern or tray from six inches to eight
inches deep, with breadth in proportion to the length, and at one end
immediately over the bed is placed perpendicularly a pipe or retort with
open mouth looking downwards.
"
On the top of retort is placed a supply cistern to contain soda lyc,
or whatever liquid it may be, and under which are placed distributors,
trays, or perforations of the best description so as to break up the lye
flowing from cistern, or it may be forced in by force pumps. The liquid
will in this way be broken into rain drops or spray, and in falling down
the retort comes in contact with the flame arising from the furnace,
which passing first over the bed ascends into the said retort is afterwards
taken down under the furnace and passes out at the back into the
chimney, thus utilizing all the heat and exposing in every way the
liquid to the action of the flame, so that before it reaches the bed the
water in the lye will be almost totally evaporated, leaving only the
*sediment or ash.
.

page_text: In the bed described will be placed agitators or mixers which in
working back and forward will stir up the ash or sediment and
expose it fully to the flame, so that any moisture it may still
retain will be completely evaporated, leaving a dry ash or sedimnt
which is brought forward to a bench and falls into a pit behind as it
accumulates.
The great advantages which will be derived from the above improve-
ments will be that lye or liquid will be evaporated in half the time
that it is by the old system, the saving of fuel and labour, as the
O agitators will do the work which a man has to be in constant attendance
to do.
.