Improvements in Feed Water Purifiers for Steam Generators.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Feed Water Purifiers for Steam Generators.
I, JAMES HERMANN ROSENTHAL, of 147 Queen Victoria Street, in the City of
London, Engineer, do hereby declare the nature of this Invention to be as
follows:-
This Invention has for its object to provide a feed water purifier integral with
the steam and water drum or drums of a steam generator, but removable there-
from, in which the scale forming salts contained in the feed water are deposited
by delivering the water in the form of spray into the boiler steam space over the
apparatus.
The improved purifier is composed of a long tray or cartridge which for con-
venience may be of semi-cylindrical form and which is portially immersed in the
water space and is carried partly within the steam and water drum proper and
partly within a contracted extension of it attached to the drum head.
The contracted end piece on the drum head has a bolted on end which is capable
of being taken off to permit of removal and replacing of the tray through the end
of the drum.
Within the tray are a number of inclined plates and a series of diaphragms so
arranged as to intercept the direct flow of the feed water which is admitted
through a dome fitted with a rose or spray nozzle over the contracted end of the
drum and passes in a sinuous or wave-like path along the tray towards its inner
end which is closed and furnished with an outlet pipe at a suitable height over
the bottom of the tray.
The feed water entering in the form of spray into the steam space at the end of
the drum is at once heated to such a temperature as to cause the separation and
deposition of the scale-forming salts on the bottom of the tray and its
passage along the bottom of the tray with the water into the boiler
proper is prevented by the diaphragms or division plates of which a
number extend upwards from the bottom of the tray to a point under the water
level whilst those intermediate dip from a higher level into the water but do not
reach the bottom. Thus the deposition of incrustation forming matter takes place
without it being carried into the boiler, and great facility is offered for cleaning
by withdiawal of the tray or cartridge through the drum end.
Instead of fitting the purifier tray or cartridge within the main steam and water
drum it may be placed within a small auxiliary steam and water drum into which
the feed water is delivered in the form of spray, the auxiliary drum being situated
over the main drum or over a pair of such drums and being made with a removable
end. In this case the auxiliary drum is made to serve as part of the boiler space
by connecting it by means of steam and water pipes with the main drum or drums,
the steam pipe or pipes being carried from the steam space of the main drum to
that of the auxiliary drum and the water pipe or pipes in like manner serving

page_text: to connect the water spaces of the drums. In a twin drum boiler the auxiliary
drum containing the spray purifier is common to both main drums.
Dated this 12th day of November 1896.
WALLACE FAIRWEATHER,...
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
int Vincent Street, Glasgow, Agent for the Applicant.
Improvements in Feed Water Purifiers for Steam Generators.
I, JAMES HERMANN ROSENTHAL, of 147 Queen Victoria Street, in the City 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 has for its object to provide a feed water purifier integral with
the steam and water drum or drums of a steam generator, but removable there-
from, in which the scale forming salts contained in the feed water are deposited
by delivering the water in the form of spray into the boiler steam space over the
apparatus.
The Invention is illustrated by the accompanying drawings in which Figure 1
is a longitudinal section of the main drum of a water tube boiler to which the
improved feed water purifier is shown as applied. Figure 2 is a sectional end
elevation, Figure 3 a horizontal section and Figure 4 a transverse vertical section
of the same. Figure 5 is a longitudinal section, Figure. 6 a front end elevation,
Figure 7a horizontal section and Figure 8 a transverse vertical section of a
modified construction of the improved feed water purifier as applied to a boiler
drum. Figure 9 is an elevation of part of a boiler showing in section a further
modification of the purifier.
Referring to Figures 1, 2, 3 and 4, the improved purifier is composed of a long
tray or cartridge A which may be as shown of semi-cylindrical form and which
is partially immersed in the water space and is carried partly within the steam
and water drum B and partly within a contracted extension B' thereof attached
to the drum head B.
The contracted end piece B' on the drum head has a bolted on end b¹ which is
capable of being taken off to permit of removal and replacing of the tray A through
the end of the drum.
Within the tray or cartridge A are a number of inclined plates C and a series
of diaphragms C so arranged as to intercept or present obstacles to the direct
flow of the feed water which is admitted through a dome D fitted with a rose or
spray nozzle E over the contracted end B of the drum, and passes in a sinuous
or wave-like path along the tray towards its inner end which is closed at C³ and
is furnished with an outlet pipe F at a suitable height over the bottom of the
tray, delivering the pumped water into the main drum B.
The feed water enters in the form of spray into the steam space at the end of
the drum B1 and is at once heated to such a temperature as to cause the separation
and deposition of the scale-forming salts on the bottom of the tray A and its
passage along the bottom of the tray with the water into the boiler proper is
prevented by the diaphragms or obstacle plates C', of which a number extend
upwards from the bottom of the tray to a point under the water level whilst those
intermediate dip from a higher level into the water, but, do not, reach the bottom.
Thus the deposition of incrustation forming matter takes place; without it being

page_text: carried into the boiler, and great facility is offered for cleaning by withdrawal
of the tray or cartridge A from the drum end. A blow off cock G is also provided
for periodical removal of sediment.
In the modification shown at Figures 5 to 8 the tray or cartridge instead of
being made so as to be capable of withdrawal as a whole from the drum B, B',
is formed by extending the lower part of the shell of the contracted drum end Bi
inwards into the water space of the main drum B, and attaching the diaphragms
or division plates C to the contracted end part 1 of the drum B. In this case
a manhole door B3 is fitted on the contracted drum end to give access for removal
of sludge and for renewal of the division plates C which are made detachable.
In other respects the feed water purifier resembles that described with reference
to Figures 1 to 4.
Instead of fitting the purifier tray or cartridge within the main steam and
water drum it may as shewn at Figure 9 be formed by or placed within a small
auxiliary steam and water drum H into which the feed water is delivered in the
form of spray, the auxiliary drum being situated over or alongside of the main
drum or over a pair of such drums and being made with a removable end, or
fitted with a large manhole. In this case the auxiliary drum is made to serve as
part of the boiler space by connecting it by means of steam and water pipes I
and J with the main drum or drums, the steam pipe or pipes I being carried from
the steam space of the main drum to that of the auxiliary drum and the water
pipe or pipes J in like manner serving to connect the water spaces of the drums.
In a twin drum boiler the auxiliary drum containing the spray purifier is common
to both main drums.
Having now particularly described and ascertained the nature of my said In-
vention, and in what manner the same is to be performed, I declare that what I
claim is:
1. In a steam generator the combination with the steam and water drum of a
feed water purifier constructed and arranged so as to be capable of withdrawal
or removal from the drum substantially as described.
2. A feed water purifier for steam generators composed of a tray or cartridge
connected to or forming an end extension of the main steain and water drum
and provided with a series of obstacle plates and an inlet nozzle adapted to deliver
the feed into the steam space in the form of spray substantially as described.
3. A feed water purifier for steam generators composed of an auxiliary drum
having steam and water pipes connected to the steam and water spaces of the
main drum and fitted with obstacle plates and an inlet nozzle adapted to discharge
the feed water in the form of spray into the steam space of said auxiliary drum
substantially as described.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62 Saint Vincent Street, Glasgow, Agent for the Applicant.