Method of and Apparatus for Feeding Water-tube Boilers.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Method of and Apparatus for Feeding Water-tube Boilers.
I, NICHOLAS TVERSKOŸ, of No. 1 Prison's Lane St. Petersburg, in the
Empire of Russia, Engineer of the Russian Navy (retired) do hereby declare the
nature of this invention to be as follows:-
In many of the existing systems of water-tube boilers the water is injected into
the boiler by the action of feed pumps, and descends merely by its own weight,
not being forced forward by the pump, so feeding water is driven into the upper
portion of a boiler B, for instance, of Belleville's water tube system (Figure 1)
and descends into the lower portion of the boiler A only by its own weight, the
pump or injectors impelling the water into the boiler being not utilized for
promoting the water circulation. In such a case the water, when meeting on its
way with narrow passages, is impeded and the circulation of water will be
insufficiently active. Perhaps it might serve, if a separate wide pipe, or channel
were provided for the free passage of the ascending current, and if in this pipe or
channel the water returning from the upper portions of the boiler, does not meet
with an ascending current of steam or heated water.
My invention consists in forcing the water by the feed pump neither into the
upper boiler or steam collector, as, for instance, in Belleville's boilers B (Figure 1)
nor in the lower portion of the boiler, i.e.: into the water chamber A, as in some
systems of water-tube boilers, but into pipe, or channel d through which the
return water descends from the steam chamber into the water chamber. Further
I force the return water current through a special appliance, baving inside a
moveable or fixed partition to direct the entering jet of water along the return
current pipe into 'the water chamber, not allowing the same to pass into those
parts of the boilers where steam is contained, and, particularly, not allowing the
feeding water to flow in the boiler against the current established, for instance,
not in counter-direction to the water current descending or rushing from the
steam chamber into the water chamber of the boiler.
In general the appliance with its partition is designed not only not to prevent the
water from easily returning from the upper portions of the boiler into the lower
for vaporization, but, on the contrary, to facilitate such movement by causing
the feeding water to go in the same direction as the return current water, and,
thus driving the return water in the direction in which it is desired to move, by
the force of the pump or injector impelling the feeding water into the boiler.
The method might be applied to any water-tube boiler, as, for instance, a boiler
of Belleville's system (Figure 1) where A is the common lower water chamber
B is the
wherefrom the water passes into the elements cc to be vaporized.
common upper boiler where the steam is collected from all the elements, as also
that part of the water that has not been vaporized in the elements; c is one of
such elements or way for the ascending current of water, d is the return or
descending current pipe, i.e. the way by which the water that has entered through
the elements into the steam collector rushes therefrom back in the lower feed
box A. Applying to such a boiler the new method of water supply the same will

page_text: differ from the common Belleville boiler in that the feeding water will no longer
be forced into the boiler by the pipe E, as formerly, against the water flow of the
elements so as to obstruct the passage of the hot water from the elements into the
steam collector A and to cool the steam and water therein, but into the pipe d
through a special appliance f g h, provided with a partition P that directs the
feeding water downwards where the same mixes with the return water X X and
moves with and not against the current of water rushing down from the upper
boiler B into the lower feed box A; thus impelling this descending water and
causing it to enter more quickly into the feed box Å and to pass therefrom into
the elements c c. Under such conditions one may safely increase even in
Belleville's boilers the heat in the furnaces by blowing air in the ash pit and the
destruction of the tubes for want of water need not be feared. When feeding
boilers in the common way by pumping the water into the steam collector B by
the tube E, it is impossible to increase the feed beyond a certain limit. If a
large mass of water be rapidly forced into the steam collector B by the tube E the
water is not able to run out as quickly as it enters and will collect so that the
rapid inlet of water only promotes the overfilling of the steam collector B and
the increased cooling of the steam entering into the steam collector B from the
elements cc, while at the same time the lower parts of the elements cc notwith-
standing the increased water supply do not receive sufficient water. This difficulty
occurs when, in consequence of rapid combustion in the furnaces, the speed of
evaporation exceeds that at which the water rushes from the upper steam
collector B into the lower water chamber A, and then enters the elements c c.
When using the aforesaid appliance to conduct the return current of water from.
the upper parts of the boiler, the water, on the contrary passes into the chamber A,
and therefrom into the elements cc with any desired speed and all that is necessary
is to provide a powerful feeding engine and to have the same worked with full
power, and the water will pass into and through the elements c c more rapidly than
the most intense heat can vaporize it.
In order to prevent the water meeting with any obstacle after having passed the
partition P, from being deflected upwards in the tube d against the flow of the
water X X descending the steam collector B, the partition P may be arranged in
such a manner as to oscillate on a joint (see Figures 2, 3) so that when forcing the
water into the appliance through the channel g its passage downwards may be
opened less or more by inclining the valve P according to the amount of feeding
water to be impelled into the boiler.
To prevent the total obstruction of the passage of the return water from the
steam collector, if there be a strong forcing of the pump, the oscillating valve or
partition of the appliance may have a box-like section (Figure 4). Either the
valve inay be box-like as in Figure 4 or of flat section as in Figures 2 and 3.
A regulating screw may be used, which being screwed in more or less allows
the valve P to open the passage for the water forced in to a greater or lesser
extent.
The valve can be provided also with a spring to afford a more rapid opening of
the passage for the return current water when the pressure exerted by the water
forced in by the pump ceases.
The appliance gh may be located in the tube d higher or lower, as convenient,
ie. nearer to the steam collector B or in a more remote position therefrom.
:
It should be observed that my novel method of feeding boilers is only by way of
illustration described in connection with boilers such as Belleville's and Babcock's;
if applying the new method to such boilers as Dürr's, where the tubes are located
in a common fire box divided into two compartments by a partition in order to
prevent the mixing of the descending and ascending currents of water, the com-
partment for the return current of water must be connected at its upper part, to
the upper part of the compartment for the ascending currents of water and steam
by one, two or more of my feed appliances so that all superfluous water may pass
through the same from the rising current compartment into the reverse and

page_text: descending current compartment, and the feeding water must be forced in such
boiler only through the aforesaid feed appliances that unite two compartments.
Dated this 19th day of September 1895.
CARPMAEL & Co.,
Agents for the Applicant.
and Apparatus for Feeding water-tube Bollers.
I, NICHOLAS TVERSKÖY, of No. 1 Prison's Lane, St. Petersburg, in the
Empire of Russia, Engineer of the Russian Navy (retired) 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 :-
In many of the existing systems of water-tube boilers the water is injected into
the boiler by the action of feed pumps and descends merely by its own weight,
not being forced forward by the pump, so feeding water is driven into the upper
portion of a boiler B, for instance of Belleville's water tube system (Figure 1 of
the drawings lodged with the Provisional Specification) and descends into the
lower portion of the boiler A only by its own weight, the pump or injectors
impelling the water into the boiler being not utilized for promoting the water
circulation. In such a case the water, when meeting on its way with narrow
passages is impeded and the circulation of water will be insufficiently active.
Perhaps it might serve, if a separate wide pipe, cr channel were provided for the
free passage of the ascending current, and if in this pipe or channel the water
returning from the upper portions of the boiler, does not meet with an ascending
current of steam or heated water.
My invention consists in forcing the water by the feed pump neither into the
upper boiler or steam collector, as for instance, in Belleville's boilers B (Figure 1)
nor in the lower portion of the boiler, i.e. into the water chamber A, as in some
systems of water-tube boilers, but into pipe, or channel, d, through which the
return water descends, from the steam chamber into the water chamber. Further
I force the return water current through a special appliance, having inside a
moveable or fixed partition to direct the entering jet of water along the return
current pipe into the water chamber not allowing the same to pass into those
parts of the boilers where steam is contained, and particularly not allowing the
feeding water to flow in the boiler against the current established, for instance,
not in counter direction to the water current descending or rushing from the steam
chamber into the water chamber of the boiler.
In general the appliance with its partition is designed not only not to prevent
the water from easily returning from the upper portions of the boiler into the
lower for vaporization, but, on the contrary, to facilitate such movement by
causing the feeding water to go in the same direction as the return current
water, and, thus driving the return water in the direction in which it is desired
to move, by the force of the pump or injector impelling the feeding water into the
boiler.
The method might be applied to any water-tube boiler, as, for instance, a boilér
of Belleville's system (see Figure 1) where A is the common lower water chamber
wherefrom the water passes into the elements c c to be vaporized. B is the
common upper boiler where the steam is collected from all the elements, as
also that part of the water that has not been vaporized in the elements: e is
one of such elements or way for the ascending current of water, d is the return or
descending current pipe, i.e. the way by which the water that has entered through
the elements into the steam collector rushes therefrom back in the lower feed
box A. Applying to such a boiler the new method of water supply the same will

page_text: differ from the common Belleville boiler in that the feeding water will no longer
be forced into the boiler by the pipe E, as formerly, against the water flow of the
elements so as to obstruct the passage of the hot water from the elements into the
steam collector A and to cool the steam and water therein, but into the pipe d
through a special appliance f, g, h, provided with a partition P that directs the
feeding water downwards where the same mixes with the return water X X and
moves with and not against the current of water rushing down from the upper
boiler B into the lower feed box A; thus impelling this descending water and
causing it to enter more quickly into the feed box A and to pass therefrom into
the elements cc. Under such conditions one may safely increase even in Belleville's
boilers the heat in the furnaces by blowing air in the ash pit and the destruction of
the tubes for want of water need not be feared. When feeding boilers in the
common way by pumping the water into the steam collector B by the tube E, it is
impossible to increase the feed beyond a certain limit. If a large mass of water be
rapidly forced into the steam collector B by the tube E the water is not able to
run out as quickly as it enters and will collect so that the rapid inlet of water only
promotes the over-filling of the steam collector B and the increased cooling of the
steam entering into the steam collector B from the elements c c, while at the same
time the lower parts of the elements c c notwithstanding the increased water supply
do not receive sufficient water. This difficulty occurs when, in consequence of
rapid combustion in the furnaces, the speed of evaporation exceeds that at which
the water rushes from the upper steam collector B into the lower water chamber A,
and then enters the elements c, c.
When using the aforesaid appliance to conduct the return current of water from
the upper parts of the boiler, the water, on the contrary, passes into the chamber A,
and therefrom into the elements c c with any desired speed and all that is necessary
is to provide a powerful feeding engine and to have the same worked with full
power, and the water will pass into and through the elements ce more rapidly than
the most intense heat can vaporize it.
In order to prevent the water meeting with any obstacle after having passed the
partition P, from being deflected upwards in the tube d against the flow of the
water X X descending the steam collector B, the partition P may be arranged in
such a manner as to oscillate on a joint (see Figures 2, 3) so that when forcing the
water into the appliance through the channel
g its passage downwards may be
opened less or more by inclining the valve P according to the amount of feeding
water to be impelled into the boiler.
To prevent the total obstruction of the passage of the return water from the
steam collector, if there be a strong forcing of the pump, the oscillating valve or
partition of the appliance may have a box-like section (Figure 4). Either the
valve may be box-like as in Figure 4, or of flat section as in Figures 2 and 3.
A regulating screw may be used, which being screwed in more or less allows
the valve P to open the passage for the water forced in to a greater or lesser
extent.
The valve can be provided also with a spring to afford a more rapid opening of
the passage for the return current water when the pressure exerted by the water
forced in by the pump ceases.
The appliance f, g, h, may be located in the tube d higher or lower, as
convenient, i.e. nearer to the steam collector B or in a more remote position
therefrom.
It should be observed that my novel method of feeding boilers is only by way of
illustration described in connection with boilers such as Belleville's and Babcock's;
if applying the method to such boilers as Dürr's where the tubes are located in a
common fire box divided into two compartments by a partition in order to prevent
the mixing of the descending and ascending currents of water, the compartment
for the return current of water must be connected at its upper part, to the upper
part of the compartment for the ascending currents of water and steam, by one,
two or more of my feed appliances so that all superfluous water may pass through

page_text: the same from the rising current compartment into the reverse and descending
current compartment, and the feeding water must be forced in such boiler only
through the aforesaid feed appliances that unite two compartments.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The method of feeding water tube boilers consisting in causing the feed water
to be pumped or forced into the pipe or channel by which the return water descends
from the upper collector to the lower one and in providing a partition in the said
pipe or channel directing the flow substantially as described.
Dated this 18th day of June 1896.
CARPMAEL & Co.,
Agents for the Applicant.