Improvements in Apparatus or Machines for Supplying from Salt Water Fresh Water to Marine Boilers.
Year: 1889

page_text: Date of Application, 18th May, 1889
Complete Specification Left, 5th Sept., 1889-Accepted, 26th Oct., 1889
PROVISIONAL SPECIFICATION.
Improvements in Apparatus or Machines for Supplying from Salt
Water Fresh Water to Marine Boilers.
I, ADAM GIRDWOOD, of 13 George Street, Leith, in the County of Midlothian,
North Britain Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention refers to the construction of apparatus or machines for supplying or
evaporating fresh water from salt water for marine boilers.
This is effected in a vessel which may conveniently be made of steel, malleable or
cast iron and of a size suitable to the quantity of salt water required but say for
engines of 1000 H.P. about six feet high and two feet in diameter. At the top of
the vessel there is provided an equilibrium valve with long spindle working through
a gland in a box from which water is admitted from the circulating pump, this valve
may be opened or closed from the outside by hand although through the action of a
float in the vessel it becomes self acting this float has a central aperture through
which water enters from the discharge of circulating pump, its admission being by
the valve before mentioned. Below the float there is a steam nozzle supported or
hung in the vessel by a bracket across same or from a branch cast on the nozzle; this
nozzle is made with a central aperture leading to a truncated funnel mouth, to the
upper end of which there is a steam pipe from the boiler.
The base of the vessel is provided with a hinged door, in which door there is a
blow off cock. Near the top of the vessel there are pipes leading one to the hot well
and another to the condenser.
The action of the apparatus is as follows:-
The water to be evaporated is taken from the discharge of the circulating pump and
has some heat in it and is at a sufficient elevation to enter the evaporating vessel
without pumping, the water from pump enters the top of the vessel through the
central spindle of the valve and thence down through the float into the centre of
the nozzle, the float resting on the nozzle when the water valve is full open, and as the
water rises in vessel this valve is closed by the float. The steam is directed so as to
blow downwards and to draw the water with it the steam rising up all round the sides
of the evaporating vessel and is conveyed either to the hot well or condenser (to hot
well for example when only used to supplement the usual loss of water from boiler and
to the condenser in cases where an extra quantity is required). Into hot well say
vacuum 28" temperature 100° Fahrenheit (of hot well) this will be raised to
200° Fahrenheit by condensed steam and thus most of the heat taken from the boiler
is recovered. In the case of the steam going into the condenser this would be lost,
but then the water will boil at a much lower temperature. The salt deposited at the
bottoin of the evaporating vessel is blown off through the blow off cock in the hinged
door, and by this door the nozzle can be removed from the evaporating vessel for
cleaning, with the greatest facility.
10.תבד
M1000
COMPLETE SPECIFICATION.
Improvements in Apparatus or Machines for Supplying from Salt
Water Fresh Water to Marine Boilers.
I, ADAM GIRDWOOD, of 13 George Street Leith, in the County of Midlothian, North
Britain, Engineer, do hereby declare the nature of this invention and in what
Price 11d1

page_text: manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
My invention refers to the construction of apparatus or, machines for supplying or
evaporating fresh water from' salt water for marine boilers.
This is effected in a vessel which may conveniently be made of steel, malleable or
cast iron and of a size suitable to the quantity of salt water required, but say for
engines of 1000 H.P. .about six feet high and two feet in diameter. At the
top of the vessel there is provided au equilibrium valve with long spindle working
through a gland in a box from which water is admitted from the circulating pump
discharge, this valve may be opened or closed from the outside by hand although
through the action of a float in the vessel it becomes self-acting this float has a
central aperture through which water enters from the discharge of circulating
pump, its admission being by the valve before mentioned. Below the float there
is a steam nozzle supported or hung in the vessel by a bracket across same, or
from a branch cast on the nozzle; the nozzle is made with a central aperture leading
to a truncated funnel mouth, to the upper end of which there is a steam pipe from
the boiler. The base of the vessel is provided with a hinged door, in which door
there is a blow off cock. Near the top of the vessel there are pipes leading one
to the hot well and another to the condenser.
In order that my invention may be fully understood and readily carried into
effect I will further describe same by reference to the accompanying drawings.
Figure 1 is a vertical sectional elevation of an apparatus or machine for
supplying from salt water, fresh water. to marine boilers, constructed according to
my invention.
Figure 2 is an inverted plan of same shewing the hinged door at the bottom of
the apparatus.
Figure 3 is a sectional elevation of the equilibrium valve with long spindle, drawn
to a larger scale than Figure 1.
Figure 4 is a plan view of Figure 3 but shewing half of same in section.
Figure 5 is a vertical section of the steam nozzle shewn at Figure
but drawn
to a larger scale than that figure, and Figure 6 is a transverse section on the
line XY of same figure.
Figure 7 is a plan of the water inlet of the nozzle shewn at Figure 5, and
Figure 8 is a vertical sectional elevation of the same apparatus with the parts
arranged therein somewhat differently to that shewn at Figure 1 which would be a
convenient arrangement where the space is limited.
Similar letters of reference refer to like parts in all the figures.
A is the evaporating vessel which may for example be of the form shewn at
Figures 1 or 8 although I do not limit myself to such forms; B B are the valves
which may be of the equilibrium class as shewn at Figure 1 or of ordinary type;
and it is by these valves that the water from the circulating pump discharge is
admitted to the vessel A. is the valve spindle, D is the gland through which
it works; E is the float, E is the central aperture therein; the valve spindle C
and the float E are connected together as shewn, Ex being a guided ring. Fis
the steam nozzle or injector; F1 is the central water aperture and which may have
as shewn a tubular projecting part for guiding the float and holes are provided
therein to allow water to circulate when the valves are closed. F' is the truncated
funnel mouth thereof, F3 is the steam pipe from the boiler and leading to the
truncated funnel mouth F. G is the door at the base of vessel A, and G is the
aperture therein governed by a stop or blow off cock not shewn in the drawings.
H is the aperture in the vessel A from which a pipe not shewn in the drawings
leads to the hot well. J is a similar aperture in the vessel A from which a pipe
not shewn in the drawings leads to the condenser. K K are apertures for fixing a
water gauge glass.
The action of the apparatus is as follows:
The water to be evaporated is taken from the discharge of the circulating pump and
has some heat in it and is at a sufficient elevation to enter the evaporating vessel A

page_text: without pumping the water from pump enters the top of the vessel A by the
valves B and thence down through the central aperture E¹ of the float E into the
centre of the steam nozzle or injector F, the float resting on the nozzle or on
projections therefrom as shewn, when the water valve is full open. As the water
rises in the vessel A this valve B is closed by the rising of the float E. The steam is
directed so as to blow downwards in the direction shewn by the arrows and to draw
the water with it, the steam rising up all round the sides of the evaporating vessel A
and is conveyed either to the hot well by the outlet H or to the condenser by the
outlet J (to the hot well for example when only used to supplement the usual loss of
water from boiler and to the condenser in cases where an extra quantity is required).
Into hot well say vacuum 28" temperature 100° Fahrenheit (of hot well) this will be
be raised to 200° Fahrenheit by condensed steam and thus most of the heat taken
from the boiler is recovered. In the case of the steam going into the condenser this
would be lost but then the water will boil at a much lower temperature. The quantity
of water evaporated can be regulated by increasing or lessening the supply of steain
and that in condensing into hot well this must be regulated so as not to have the feed
water warmer than 200°. The salt deposited at the bottom of evaporating vessel is
blown off through the aperture G and through the blow off cock in the hinged door G
and by this door G the steam nozzle or injector F can be removed from the evaporating
vessel A for cleaning, with the greatest facility.
According to the modification shewn at Figure 8 it will be seen that the valve B is
connected indirectly to the float by a lever B and the water admitted by the valve B
is conducted to the central water aperture F¹ by a tube B*. The door G is not shewn
hinged to the vessel but may be bolted thereto. L is a screwed plug in the top cover
to get at the interior and clear the float when necessary. This plug is not required in
the arrangement shewn in Figure 1 because the spindle Cis led up outside the
vessel A for that purpose. Steam supplied by the pipe F3 may be taken from the
jackets or from the boiler.
The various parts composing the apparatus may be arranged to suit the place or
position they have to occupy for example where space is limited the arrangement
shown at Figure 8 will be found particularly advantageous.
Sometimes for example it may be convenient to turn the steain nozzle upside down
in which case the steam jet should be in the centre and the water admitted from
another vessel containing the float and equilibrium valve.
Instead of using a float the steam and water valves might be regulated by hand.
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. In apparatus or machines for supplying from salt water, fresh water, to marine
boilers, the combination in a vessel A with door G of the valve B, the float E
and the steam nozzle or injector F constructed, arranged and acting substantially
as herein before described and illustrated with reference to the accompanying
drawings.
2. In apparatus or machines for supplying from salt water, fresh water to marine
boilers, the valves B and float E having central aperture E' by which the water
passes, in combination with the steam nozzle or injector F having a central water
aperture F truncated funnel mouth F2, and steam pipe F³, substantially as described
and illustrated with reference to the accompanying drawings.
Dated this Fifth day of September
E53
437
enon day of SepteILL LOO
ADAM GIRDWOOD.
By Brewer & Son,
33, Chancery Lane, London, Patent Agents.
ADAM GIRDWOOD.
By Brewer & Son,
33, Chancery Lane, London, Patent Agents.