Improvements in Evaporating Apparatus.
Year: 1892

page_text: Date of Application, 17th Mar., 1892
Complete Specification Left, 28th Mar., 1892-Accepted, 30th Apr., 1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THOMAS CRANEY, of Bay City, Bay County,
Michigan, United States of America, Manufacturer.]
Improvements in Evaporating Apparatus.
I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows :-
This invention relates to new and useful improvements in salt evaporating
apparatus, especially designed for use in the manufacture of salt; and the invention
consists in the peculiar construction of an evaporating tank combined with a furnace,
whereby I get the best possible results from the fuel, together with economy in
the construction of the apparatus.
The invention further consists in the peculiar construction of the evaporating
tank, whereby the salt is collected in an elevator conduit for discharging it outside
the machine.
The invention also consists in the peculiar arrangement and construction of the
parts whereby the heating tubes from the furnace through the tank are easily
accessible for cleaning purposes, and further in the peculiar construction of the
evaporating tank in combination with the condenser, and in the peculiar construc-
tion of the fuel feeding mechanism to the furnace, all as hereinafter described.
In carrying out my invention, between the foundation walls is formed a pit and
upon the said walls is supported the furnace having suitable feed and draft doors.
The inner casing extends above the furnace and within this casing is formed the
combustion chamber.
An intermediate casing is arranged concentrically to the inner casing and of
somewhat larger diameter, forming within the evaporating chamber.
A lateral extension is provided at the top of the evaporating chamber for con-
ducting the vapours therethrough to a condensing chamber projecting down beside
the said evaporating chamber. The said condensing chamber is provided with a
water supply pipe and a spraying device. An air supply pipe leads to a pump for
creating a partial vacuum to aid in the evaporation.
Outside the intermediate casing is an annular outer casing forming between it
and the said intermediate casing a smoke chamber which at the top is connected
with suitable exit flues or chimneys. A series of tubes connects the combustion
chamber with the smoke chamber. These tubes I arrange in vertical series,
leaving between them suitable vertical passageways.
A vertical feed duct leads into the combustion chamber to which fuel is fed by
means of an elevator of any suitable construction. A vertical shaft is journalled
in bearings in the centre of the said feed duct and extends through the top thereof,
where it is provided with a suitable sprocket wheel or other means for imparting
a rotary motion thereto from any suitable source of power. At the base and
within the combustion chamber is secured to this shaft a spreader upon which the
fuel will fall, and be suitably spread before falling into the furnace.
To prevent the products of combustion from passing out of the duct and thence
into the elevator duct, I form a casing at the top of the elevator duct and
centrally therewith a partition extending across the sides, while dampers pivoted
or secured in the casing at the sides, close the spaces between the carrier and the
partitions.
It is evident that if the evaporating chamber which forms the tank for the
brine, be supplied with a sufficient quantity thereof, and the fire built in the
furnace, that the products of combustion will heat the combustion chamber passing

page_text: through the flues into the smoke chamber and thence out through the stack or
chimney.
This will result in the application of heat upon both sides of the brine, which
is within the annular chamber between the casings and heat will also be imparted
through the flues through which the products of combustion pass, thus rapidly
heating the brine, the evaporation from which is greatly accelerated by the
formation of a vacuum the vapour is condensed in the condenser and carried off
through an outlet pipe.
As the salt crystals settle to the bottom of the evaporating chamber they may
be collected and carried away in any suitable manner; I preferably collect them 1
by means of one or more vertical conduits extending downwards and connected
with another conduit in which an elevator and carrier is operated.
Suitable holes, are formed in the lower part of the intermediate casing to permit
of the removal of any sediment that may accumulate on the tubes and by the
arrangement described these tubes may be used as a ladder by means of which a 1
man may ascend to the top, passing through the vertical passage. Manholes are also
preferably provided in the upper part of the said casing or at any other convenient
point.
Dated this 17th dow of Manh 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Evaporating Apparatus.
I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, do hereby a
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 :-
This invention relates to new and useful improvements in salt evaporating
apparatus, especially designed for use in the manufacture of salt; and the invention
consists in the peculiar construction of an evaporating tank combined with a
furnace, whereby I get the best possible results from the fuel, together with economy
in the construction of the apparatus.
The invention further consists in the peculiar construction of the evaporating
tank, whereby the salt is collected in an elevator conduit for discharging it outside
the machine.
The invention also consists in the peculiar arrangement and construction of the
parts whereby the heating tubes from the furnace through the tank are easily
accessible for cleaning purposes, and further in the peculiar construction of the
evaporating tank in combination with the condenser, and in the peculiar construction. 4
of the fuel feeding mechanism to the furnace, as hereinafter described.
In the accompanying drawings:-
Figure 1 is a vertical central section through my improved device.
Figure 2 is a vertical central section through the same on line 2, .
Figure 3 is an elevation of the base thereof at right angles to Figure 1.
In carrying out my invention between the foundation walls A is formed a pit B
and upon the said walls is supported the furnace C having suitable feed and draft
doors.
The inner casing D extends above the furnace and within this casing is formed
the combustion chamber E.
An intermediate casing F is arranged concentrically to the inner casing D and of
somewhat larger diameter, forming the evaporating chamber.
A lateral extension H is provided at the top of the evaporating chamber G, for
5

page_text: conducting the vapours therethrough to a condensing chamber I projecting down
beside the said evaporating chamber. The said condensing chamber is provided
with a water supply pipe I and a spraying device 1'. An air supply pipe J leads
to a pump for creating a partial vacuum to aid in the evaporation.
Outside the intermediate casing F is an annular oute casing K forming between
it and the said intermediate casing a smoke chamber L which at the top is con-
nected with suitable exit flues or chimneys M.
A series of tubes N connects the combustion chambers E and L passing through
the chamber G. These tubes I arrange in vertical series, as shown in Figure 2,
leaving between them suitable vertical passageways N'.
A vertical feed duct O leads into the combustion chamber E and to which fuel is
fed by means of an elevator O' of any suitable construction. A vertical shaft P is
journalled in bearings in the centre of the said feed duct O and extends through
the top thereof, where it is provided with a suitable sprocket wheel Pl or other
means for imparting a rotary motion thereto, from any suitable source of power;
at the base; and within the combustion chamber is secured to this shaft a
spreader Q upon which the fuel will fall, and be suitably spread before falling into
the furnace.
To prevent the products of combustion from passing out of the duct O and
thence into the elevator duct, I form a casing a at the top of the elevator duct and
centrally therewith a partition 6 extending across the sides, while dampers a pivoted
or secured in the casing at the sides, close the spaces between the carrier and the
partitions b.
It is evident that if the evaporating chamber G which forms the tank for the
brine, be supplied with a sufficient quantity thereof, and the fire built in the furnace,
that the products of combustion will heat the combustion chamber E, passing
through the flues N into the smoke chamber L and thence out through the stack or
chimney M.
This will result in the application of heat upon both sides of the brine, which is
within the annular chamber between the casings D and F, and heat will also be
imparted through the flues N, through which the products of combustion pass, thus
rapidly heating the brine, the evaporation from which is greatly accelerated by
the formation of a vacuum, the vapour being condensed in the condenser and carried
off through an outlet pipe H.
As the salt crystals settle to the bottom of the evaporating chamber G they may
be collected and carried away in any suitable manner; I preferably collect them
by means of one or more vertical conduits S extending downwards and connected
with another conduit S' in which an elevator and carrier S' is operated.
In the drawings I have shown two such conduits but it is evident that by
inclining the lower walls T of the tank, towards a single conduit that one will
answer.
Suitable manholes such as U are formed in the lower part of the intermediate
casing F, to permit of the removal of any sediment that may accumulate on the
tubes N, and by the arrangement described these tubes may be used as a ladder by
means of which a man may ascend to the top, passing through the vertical
passage N. Manholes V are also preferably provided in the upper part of the
said casing F or at any other convenient point.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, as communicated to me by my
foreign correspondent, I declare that what I claim is :-
1. In an evaporating apparatus, the combination of a furnace; an annular
evaporating tank, a combustion chamber within and a smoke chamber outside
thereof, a series of flues connecting the combustion and smoke chambers through
the tank, a downward extension of such annular tank forming a sediment leg or
chamber, and a conduit connecting the base of the tank with an elevator, sub-
stantially as described.

page_text: 2. In an evaporating apparatus, the combination of an evaporating tank, a com-
bustion chamber within and a smoke chamber outside thereof, a series of flues
connecting the combustion and smoke chambers through the tank, means for
removing the accumulated sediment from the bottom of the tank, an evaporating
chamber above the combustion chamber, a conduit for the vapours from the
evaporating chamber and a condenser, substantially as described.
3. In an evaporating apparatus, the combination of a furnace, two heating
chambers, an interposed tank extending above the heating chambers, tubes con-
necting the heating chambers arranged in vertical series and passageways formed
between such vertical series, substantially as described.
4. In an evaporating apparatus, the combination with the combustion chamber
furnace and tank above and around the combustion chamber of a vertical feed duct
passing through the tank into the combustion chamber and a rotating spreader in
the combustion chamber at the base of said duct, substantially as described.
5. In an evaporating apparatus, the combination with the combustion chamber
of the feed duct O, carrier O' casing a and dampers c, substantially as described.
Dated this 98th day of March 1900
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.