Improvements in Boiler Feed-water Heating and Purifying Apparatus.
Year: 1895

page_text: Date of Application, 6th Mar., 1895
Complete Specification Left, 13th Dec., 1895-Accepted, 13th Jan.,
1896
PROVISIONAL SPECIFICATION.
Improvements in Boiler Feed-water Heating and Purifying
Apparatus.
I, JAMES EDMUND CARROLL of Albany Buildings, 39 Victoria Street,
Westminster, in the County of London, Engineer, do hereby declare the nature
of this invention to be as follows :-
This invention relates to certain improvements in apparatus and means for
purifying water, by removing therefrom salts and other foreign matters; and
thereby rendering the water more serviceable for steam boilers.
In carrying out my invention I propose to arrange within a boiler, which may
otherwise be of ordinary construction, a series of tubes in which the feed water is
deprived of its impurities before entering the boiler.
These tubes are preferably arranged in parallel rows, and in a longitudinal
direction within the boiler above the water level, and are fastened to the ends of
the boiler in such a manner that they serve to strengthen it. At each end of the
boiler the tubes are connected together by means of a tube arranged transversely
across the outside of the boiler.
To the transverse pipe at one end the water supply pipe is attached having a
suitable cock or valve; and there is also attached a small branch pipe connecting
the transverse pipe with the steam space of the boiler, or with the live steam
pipe.
The transverse pipe at the other end serves to collect the feed water, after
having passed through the tubes, and to deliver it either directly into the boiler or
into a second transverse pipe of larger diameter than the first by means of a small
connecting pipe. This second transverse pipe or drum is connected with the boiler
by means of a branch pipe which passes below the level of the water; and it also
has another pipe connected with one end, which is used when blowing off the
deposits.
In operation the feed water is pumped or otherwise forced through the supplý
pipe into the transverse pipe immediately counected with it. From this pipe it
passes through the longitudinal tubes to the transverse pipe at the other end, being
exposed during its passage to the heat of the steam in the boiler, and thus caused
to deposit its impurities. Having reached the transverse pipe at the end opposite
to that at which the feed water euters it passes into the enlarged pipe or drum, and
from thence is delivered into the boiler, below the water level.
When it is desired to clear the tubes from all deposit, the water supply and
delivery valves are closed, and the steam cock on the small branch pipe that
connects the transverso pipe with the steam space of the boiler, or live steam pipe,
is opened. The steam passing through the tubes removes all impurities and forces
them out through the blow off pipe.
When the operation of blowing off is effected the hot water in the boiler is
allowed to enter and fill the longitudinal tubes by opening the cock on the delivery
pipe that passes below the level of the water. By this means the condensation or
unequal contraction that would occur if the feed water were introduced into the
empty hot pipes, is avoided.
In lieu of connecting the longitudinal tubes by a transverse pipe at each end
I may connect the tubes together so as to form one continuous pipe, and so
construct them that they can easily be disconnected for inspection or repairs.

page_text: Also, instead of arranging the tubes longitudinally within the boiler I may
arrange them transversely, or in any other direction found desirable.
Dated this Sixth day of March 1895.
Improvements in Boiler Feed-water Heating and Purifying
Apparatus.
.;.
I, JAMES EDMUND CARROLL, of 39 Victoria Street, Westminster, in the
County of London, 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 certain improvements in apparatus and means for
purifying water, by removing therefrom eults and other foreign matters; and
thereby rendering the water more serviceable for steam boilers.
In order that my invention may be better understood reference is had to the
accompanying drawings, upon which :-
Figure 1 is a longitudinal section of a boiler with my apparatus applied thereto,―
and
Figure 2 is a sectional plan of the same.
In carrying out my invention, I propose to arrange within a boiler A, which may be
otherwise of ordinary construction, a series of tubes B, having their ends continued
through the front and back plates of the boiler to which they are secured in sugh
a manner as to act as stays, thereby adding considerably to the strength of the
boiler. The tubes B are preferably arranged in parallel rows, and in a longitudinal
direction within the boiler above the water level. Near or at each end of the
boiler A, the tubes B are connected together by means of a tube C or C¹, arranged
transversely across the outside of the boiler.
To the transverse pipe C at one end, or other suitable position, the water-supply
pipe D is attached furnished with a control cock E; and also a small branch pipe I,
connecting the transverse pipe C with the steam space of the boiler, or to the
gauge-cock or with the live steam-pipe.
The transverse pipe C¹ at the other end serves to collect the feed-water, after
having passed through the tubes and to deliver it either directly into the boiler, or
into a second pipe H, of larger diameter than the first, by means of a small
connecting pipe J. This second transverse pipe or drum H, communicates
directly with the boiler A, by means of a branch pipe G, furnished with a cock I,
which passes below the level of the water; and it also has a second pipe or outlet M,
through which the deposits are ejected.
In operation, the feed water is pumped or otherwise forced through the supply
pipe D into the transverse pipe Ciminediately connected with it. From this pipe
it passes through the longitudinal tubes B to the transverse pipe C' at the other
end, being exposed during its passage to the heat of the steam in the boiler, and
thus caused to deposit its impuritics. Having reached the transverse pipo C¹ at
the end opposite that at which the feed water entered, it passes into the enlarged
pipe or drum H, and from thenco is delivered into the boiler A below the water
level.
When it is desired to clear the tubes from all deposits, the water supply and
delivery valves E, and I, are closed, and the steam cock K on the small branch
pipe F, that connects the transverse pipe C with the steam space of the boiler A,
or gauge-cock, or live steam pipe, is opened. The steam passing through the tubes

page_text: removes all impurities and forces them out through the blow-off pipe M, which is
opened for this purpose.
When the operation of blowing-off is effected, the hot water in the boiler is
allowed to enter and fill the longitudinal tubes B by opening the cock I on the
delivery pipe that passes below the level of the water. By this means the
condensation or unequal contraction that would occur if the feed water were
introduced into the empty hot pipes is avoided.
In lieu of connecting the longitudinal tubes B by a transverse pipe at each end,
I may connect the tubes together so as to form one continuous pipe, and so
construct them that they can be easily disconnected for inspection or repairs.
Also, instead of arranging the tubes B longitudinally within the boiler I may
arrange them transversely, or in any other direction found desirable.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. In a boiler feed-water heating and purifying apparatus, the arrangement of
longitudinal tubes B extending through the boiler, and secured to the ends or sides
thereof, so as to serve as stays, substantially as described.
2. Boiler feed-water heating and purifying apparatus, constructed combined and
arranged substantially as described and for the purposes specified.
Dated this Twelfth day of December 1895.