Improvements relating to the Supply of Distilled Water and Utilisation of Heat in Connection with Marine Steam Boilers.
Year: 1887

page_text: Date of Application, 5th Feb., 1887
Complete Left, 3rd Nov., 1887
Complete Accepted, 20th Jan., 1888
Improvements relating to the Supply of Distilled Water and
Utilisation of Heat in Connection with Marine Steam Boilers.
I, ALEXANDER CARNEGIE KIRK, of the firm of R. Napier & Sons, of Lancefield
House, Glasgow, in the County of Lanark, North Britain, Engineer, do hereby
declare the nature of this Invention to be as follows, that is to say :-
My said Invention has for its object to supply marine steam boilers with distilled
water to compensate for loss through safety valves and otherwise; or for other
purposes on board ship, in an improved and convenient manner which also has the
advantage of utilising otherwise waste heat.
The furnace gases especially of boilers worked at considerable pressure, are after
leaving the main boilers still quite hot enough to raise steam under atmospheric
or a comparatively low pressure; and in carrying out my Invention I avail myself
of this circumstance by employing the said gases after leaving the main boilers
to raise steam at a low pressure from sea water, in other words to distill fresh
water from salt water. For this purpose I place in the uptake or uptakes of a
marine boiler or set of marine boilers one or more small boilers of any suitable simple
construction; and I arrange in connection therewith apparatus for supplying the sea
water, for blowing off when the salts become too concentrated, and for leading the
steam to the main or other condenser, or if preferred into an intermediate or low-
pressure valve casing of the main engines.
To allow the distilling boiler or boilers to be cleaned of deposit whilst the main
boilers are at work I sometimes arrange a pass-by flue or flues with dampers arranged
so that when cleaning out deposit, or for any other purpose, the hot gases from the
main boilers may be led away without acting on the distilling boiler or boilers.
Dated this Fourth day of February 1887.
EDMUND HUNT,
Applicant's Agent.

page_text: Improvements relating to the Supply of Distilled Water and
Utilisation of Heat in Connection with Marine Steam Boilers.
I, ALEXANDER CARNEGIE KIRK, of the firm of R. Napier and Sons, of Lancefield
House, Glasgow, in the County of Lanark, North Britain, Engineer, 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, that is
to say :-
My said Invention has for its object to supply marine steam boilers with distilled
water to compensate for loss through safety valves and otherwise, or for other
purposes on board ship, in an improved and convenient manner, which also has the
advantage of utilising otherwise waste heat.
The furnace gases, especially of boilers worked at considerable pressure, are after
leaving the main boilers still quite hot enough to raise steam under a comparatively
low pressure, and in carrying out my Invention I avail myself of this circumstance by
employing the said gases after leaving the main boilers to raise steam at a low
pressure from sea water, in other words to distil fresh water from salt water. For
this purpose I place in the uptake or uptakes of a marine boiler or set of marine
boilers one or more small boilers of any suitable simple construction; and I arrange
in connection therewith apparatus for supplying the sea water, for blowing off when
the salts become too concentrated, and for leading the steam into an intermediate
or low-pressure valve casing of the main engines.
The precise position of the small boiler or boilers and other arrangements will vary
to suit the particular type of marine boiler in each case; but on an accompanying
sheet of explanatory drawings I show one convenient arrangement.
Figure, 1, is a sectional end elevation and figure, 2, is a sectional side elevation
showing a pair of cylindrical boilers with furnaces at both ends and with a common
uptake. In this example the added small boiler for evaporating salt water is in the
form of a plain horizontal cylinder, 3, with a steam dome, 4, and it is placed parallel
to the main boilers, 5, in a position partly between and partly above them. The
casings, 6, connecting the smoke boxes, 7, to the uptake, 8, are arranged to lead the
furnace gases in contact with the small boiler, 3. The small boiler, 3, is provided
with a safety valve, 9, and with a steam pipe, 10, for leading the steam generated in
the small boiler to an intermediate or low-pressure valve casing of the main engines.
There are also connected to the small boiler, 3, a pipe, 11, for feeding in salt water
and a blow-off cock and pipe, 12. The steam is raised of a pressure amply sufficient
for effectual blowing off and it is utilised in the main engines, being led, as already
mentioned into an intermediate or low-pressure valve casing.
To allow the distilling boiler or boilers to be cleaned of deposit whilst the main
boilers are at work, I sometimes arrange a pass-by flue or flues with dampers arranged
so that when cleaning out deposit, or for any other purpose, the hot gases from the
main boilers may be led away without acting on the distilling boiler or boilers.

page_text: Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what I
claim is :-
1. The combination with main marine steam boilers of a small boiler or boilers for
distilling or evaporating sea water and heated by the furnace gases which have acted
on the main boilers, the said small boiler or boilers being fitted with a pipe or pipes
to lead the steam thence to one or more intermediate or low-pressure casings of the
main engines substantially as and for the purposes hereinbefore described.
2. Arranging a pass-by flue or flues and dampers in connection with the small
boiler or boilers for evaporating sea water substantially as and for the purposes
hereinbefore described.
Dated this Second day of November 1887
EDMUND HUNT,
Applicant's Agent.