An Improved Combined Feeding and Brining Pump.
Year: 1899

page_text: An Improved Combined Feeding and Brining Pump.
I, DANIEL ARTHUR QUIGGIN, of 11, Harlech Road, Blundellsands, near Liver-
pool, in the County of Lancaster, Engineer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to a combined pump adapted to feed and brine, say, an
evaporator, and the objects are, to feed the evaporator from, say, the circulating
discharge, to withdraw from the evaporator an amount of brine equal to a definite
proportion of the feed supplied, to cool and dilute the brine withdrawn by admix-
ture with a portion of the said circulating discharge before it is discharged over-
board, and to prevent as far as possible the admixture of the brine and that
portion of the circulating discharge which is used to feed the evaporator.
The pump which is of the piston type, and which may be driven in any con-
venient manner, has a piston rod whose cross-sectional area bears the same
ratio to the piston area minus the rod area, that the quantity of brine to be
withdrawn bears to the quantity of feed water entering the pump at the suction
inlet.
Assuming the pump to be vertical, the discharge to the evaporator and the
suction from the circulating discharge are located at the upper end of a capacious
pocket which connects the spaces above and below the piston, and the brine inlet
is located at the lower end of the said pocket, and each of the three is provided
with a non-return valve; an outlet controlled by a spring loaded valve is also
located at the lower end of the pocket, through which valve the cooled and diluted
brine is discharged overboard.
The action is as follows:-Assuming the pocket to be filled with water, during
the down stroke of the pump a quantity of circulating discharge, equal to the
volume swept out by the piston less the volume swept out by the rod, enters the
pump through the suction; during the next upstroke a quantity of brine, equal
to the volume swept out by the rod, enters by the brine inlet, no discharge taking
place; during the next down stroke the action above the piston is the same as
in the previous down stroke, but a quantity of water equal to the effective
volume of the cylinder is now discharged, a portion passing to the evaporator
and the remainder being discharged, through the loaded valve, overboard. As
the discharge to the evaporator is at the top end of the pocket and near the
incoming feed, the portion passing to the evaporator is practically uncontaminated
by the brine withdrawn from the evaporator, whilst the latter entering, and
being discharged from, near the bottom of the pocket, mixes with and is cooled
and diluted by that portion of the suction which does not pass to the evaporator.
The feed to the evaporator is controlled by a suitable valve operated by the
water level in the evaporator. When the evaporator is being initially filled the
brine discharge is, of course, closed.
Although I have, for convenience of description, specifically referred to the

page_text: application of my invention to an evaporator, it is to be understood that it is
applicable also to other apparatus of the same class.
Dated this 20th day of January 1899.
SLOAN & LLOYD BARNES,
34. Castle Street, Liverpool,
Agents for the Applicant.
An improved Combined Feeding and Brining Pump.
I, DANIEL ARTHUR QUIGGIN, of 11, Harlech Road, Blundellsands, near Liver-
pool, in the County of Lancaster, 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:-
This invention relates to a combined pump adapted to feed and brine, say, an
evaporator, and the objects are, to feed the evaporator from, say, the circulating
discharge, to withdraw from the evaporator an amount of brine equal to a definitè
proportion of the feed supplied, to cool and dilute the brine withdrawn by admix-
ture with a portion of the said circulating discharge before it is discharged over-
board, and to prevent as far as possible the admixture of the brine and that
portion of the circulating discharge which is used to feed the evaporator.
In the accompanying drawing, which illustrates my invention, Fig. I is a
sectional elevation of a pump suitable for evaporators worked at a pressure above
that of the atmosphere. The view is to a certain extent diagrammatic; that
is to say all the valves and passages are, for the sake of clearness, assumed to
be in the same plane of section, but of course in actual practice this arrange-
ment might not be the most convenient.
1 is the pump barrel, 2 is the pump piston and is the pump rod, passing
through the usual stuffing box, 4 is the sea suction or inlet branch, 5 is the
brine inlet branch from the evaporator, fitted with an ordinary non-return
valve 13, 6 is the sea suction valve, 7, 7" and 8 are respectively the feed delivery
valve, feed check valve and branch leading to the evaporator, and 9 and 10 are
respectively the discharge valve and branch for the cooled and diluted brine,
and lead overboard. The space above the delivery valve 7 communicates with
the space below the piston by the passage 11 which opens below into the capacious
pocket 12, thus connecting both sides of the piston when the valve 7 is open.
The valve 9 is loaded by the spring 14 a little in excess of the pressure in the
evaporator, and it is to be understood that the feed pipe enters the evaporator
through a valve which is regulated either automatically or otherwise so as to
maintain a constant water level therein.
The action is as follows:
1
Assuming the passage 11 and pocket 12 to be full of water, during the down
stroke, a quantity of sea water equal to the volume swept out by the upper or
annular area of the piston enters the pump through the valve 6; during the
following up stroke, a quantity of brine equal to the volume swept out by the
pump rod 3 enters by the brine inlet 5, no discharge taking place; during the
following down stroke, the action above the piston is the same as in the previous
down stroke, but a quantity of water equal to the whole volume swept out by the
piston is now discharged, a portion passing as feed to the evaporator and the
remainder being discharged overboard.
As the discharge to the evaporator is at the top end of the pocket and near
the incoming sea water, whilst the brine enters and leaves near the bottom of

page_text: the pocket, the feed to the evaporator is practically uncontaminated by the brine,
while the latter mixes with and is cooled and diluted by the comparatively large
quantity of sea water which is not used as feed.
It will be understood that the quantity of brine removed depends upon the
volume swept out by the rod ; the quantity of sea water with which
it is cooled and diluted depends upon the volume swept out by the
annulus of the piston, and the quantity of feed delivered to the
evaporator, (its water level being maintained constant), is the evaporation
plus the brine removed. If the water in the evaporator is to be kept at, say,
rds of saltness, then the brine removed should equal the normal evaporation,
and the feed should be double the evaporation; if the rate of evaporation should
diminish, the speed of the pump remaining normal, the effect would be to freshen
up the water in the evaporator.
Although I have, for convenience of description, specifically referred to the
application of my invention to an evaporator, it is to be understood that it is
applicable also to other apparatus of the same class.
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 improved combined feeding and brining pump comprising a piston and
rod, a sea inlet valve, an inlet valve from the vessel to be brined, a delivery
valve to the vessel to be fed, a pocket communicating with both sides of the
piston through a non-return valve, and a loaded escape valve, the valves and
pocket being so arranged that the feed is comparatively uncontaminated by the
brine, and the latter is cooled before being discharged; substantially as described
and illustrated.
2. The improved pump; substantially as described and illustrated in Fig. I.
SLOAN & LLOYD BARNES,
Chartered Patent Agents,
34, Castle Street, Liverpool,
Agents for the Applicant.

page_text: the pocket, the feed to the evaporator is practically uncontaminated by the brine,
while the latter mixes with and is cooled and diluted by the comparatively large
quantity of sea water which is not used as feed.
It will be understood that the quantity of brine removed depends upon the
volume swept out by the rod 3; the quantity of sea water with which
it is cooled and diluted depends upon the volume swept out by the
annulus of the piston, and the quantity of feed delivered to the
evaporator, (its water level being maintained constant), is the evaporation
plus the brine removed. If the water in the evaporator is to be kept at, say,
rds of saltness, then the brine removed should equal the normal evaporation,
and the feed should be double the evaporation; if the rate of evaporation should
diminish, the speed of the pump remaining normal, the effect would be to freshen
up the water in the evaporator.
Although I have, for convenience of description, specifically referred to the
application of my invention to an evaporator, it is to be understood that it is
applicable also to other apparatus of the same class.
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 improved combined feeding and brining pump comprising a piston and
rod, a sea inlet valve, an inlet valve from the vessel to be brined, a delivery
valve to the vessel to be fed, a pocket communicating with both sides of the
piston through a non-return valve, and a loaded escape valve, the valves and
pocket being so arranged that the feed is comparatively uncontaminated by the
brine, and the latter is cooled before being discharged; substantially as described
and illustrated.
2. The improved pump; substantially as described and illustrated in Fig. I.
SLOAN & LLOYD BARNES,
Chartered Patent Agents,
34, Castle Street, Liverpool,
Agents for the Applicant.
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