Improvements in or relating to Evaporating Apparatus, applicable for Obtaining Fresh from Salt Water, or analogous purposes.
Year: 1895

page_text: Date of Application, 29th May, 1895-Accepted, 29th June, 1895
Improvements in or relating to Evaporating Apparatus, applicable
for Obtaining Fresh from Salt Water, or analogous purposes.
We, HENRY BURNETT WATSON and JOHN STANLEY WATSON both of High
Bridge Works in the City and County of Newcastle-on-Tyne, Engineers, 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 :-
This invention has reference to improvements in or relating to evaporating
apparatus applicable for obtaining fresh from salt water or analogous purposes and
has for its object to obtain large heating surfaces and vapour spaces with effective
circulation and means for the prevention of accumulation of scale on or about
the tubes.
Further by the improved disposition of the parts comprising the apparatus as
hereinafter described the difficulties or necessity of breaking or making numerous
joints especially in the case of ships rolling or in heavy seas as well as the time
occupied in such work are alike reduced to a minimum.
We will proceed to fully explain our invention with reference to the
accompanying drawings in which Figure 1 shows an end elevational view, Figure 2
a sectional plan view, Figure 3 a transverse sectional view and Figure 4 a
longitudinal sectional elevational view of our improved apparatus and in the
following description like marks of reference designate like parts.
9 are
Referring to the drawings A is a steel or other shell or casing within which the
evaporating process is designed to take place. One end of the shell is provided
with a large opening and adjustable cover plate A¹ secured by bolts as shown and
adapted for easy removal. F is the salt-water feed inlet and F an automatic feed
regulator of any suitable description (which does not form part of this invention).
B and B represent respectively brine cock and drain to bilges. E, E are lifting
eyes. 15 is the steam inlet cock, 6 is a safety valve, 7 is a low-pressure vapour
outlet valve and 8 a perforated pipe to collect the vapour prior to its exit.
angle iron or equivalent bearets or rails traversing the length of the shell and
secured thereto, at each end, as shown. Suspended from these bearers or rails by
shoes or clips 10 is a portable or movable frame consisting of a pair of steam
pipes 11, 11 which are braced together to obtain stiffness and maintain their
parallelism by bracing bars 12 bolted to brackets or lugs 13 formed on or secured
to the said steam pipes. These pipes are further connected together as shown by
steam coils 14, preferably solid drawn copper tubes, arranged more or less in
"accordion" form so as to enable them to freely expand or contract in accordance
with variations of temperature and thus prevent accumulations of scale adhering
to them.
The drooping disposition of these coils is also productive of effective circulation
of salt water in the shell while its total and increasing immersion prevents any
carrying off of water globules containing salt during active boiling.
The steam pipe 11 is adjustably coupled to a steam-inlet valve 15 and the
pipe 11 with an outlet or drainage cock or valve 16 from the coils 14.
The further connection of the cock or valve 16 may lead to for example the
hot well.
In ordinary working, high-pressure steam from any convenient source will be
allowed to pass valve 15 and fill pipe 11, coils 14 and pipe 11. The cold salt.

page_text: water surrounding the pipes and coils will cause condensation of steam therein
which water of condensation will be continually driven out of the coils and
piping vid valve or cock 16 to the hot well by the fresh high pressure steam
entering at 15.
The salt water in the shell will thus be evaporated by its contact with the hot
pipes and coils and the vapour will escape via pipe 8 and valve 7 (which may be
weighted to a pressure of 2 to 5 lbs. per square inch) to be elsewhere condensed.
As soon however as it becomes necessary to remove the brine or scale adhering
to the pipes and coils the attendants will first remove the coverplate A' and after
having then broken the joints of the pipes 11, 11° the whole frame consisting of
pipes 11 11 braced together as above described and coils 14 can be drawn forward
bodily on the bearers 9 and removed from the shell for cleansing or repairs and in
like manner it will be observed that the parts can as readily and casily be
replaced.
The usual other fittings such as man-holes and gauge glasses may of course be
provided or as indicated in the drawings.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In evaporating apparatus the combination with a shell having bearers 9 of a
portable evaporating frame consisting of a pair of suspended steam tubes braced
together and connected by steam tube coils arranged in "accordion" form the
steam tubes being so connected to valves that by the removal of an external cover-
plate A¹ the valve joints can be broken to permit of the evaporating frame being
removed for cleansing or other purposes and readily replaced substantially as
herein set forth.
2. In evaporating apparatus the arrangement or combination with a shell having
an adjustable cover-plate A' and fixed bearers 9 of a portable evaporating frame
consisting of pipes 11 11 braced together and suspended by clips from the said
bearers and transverse coils 14 arranged in "accordion" form these several parts
being arranged disposed or adapted to work substantially as and for the purposes
herein set forth.
3. The combination of parts comprising the improved evaporating apparatus
arranged and adapted to work substantially as herein described and illustrated in
the accompanying drawings.
Dated this 28th day of May 1895
A. CRAW HALL CHAPMAN,
3 St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.