Improvements in and relating to Water Heating and Purifying for Steam Boilers.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Water Heating and Purifying for
Steam Boilers.
I, JAMES EDMUND CARROLL, of 395, Oxford Street, in the Administrative
County of London, Gentleman, do hereby declare the nature of this invention
to be as follows:-
This method relates to improvements in heating and purifying feed waters
for steam boilers.
:
My invention has for its object, the provision of a special apparatus for sup-
plying steam boilers with heated water practically pure, so as to prevent incrus-
tation or the forming of scale in steam boilers, and also for the eliminating of
any grease, oil, or matter that may be in suspension in the water, as well as
of the scale-forming salts in solution in the water.
The apparatus which I prefer to employ comprises a water-heating, apparatus
composed of pipes of sufficient heating surface, placed in the steam space of a
boiler, so as to raise the temperature of the water sufficiently to throw down into
suspension the lime-salts or scale-forming matter in solution, and a chamber
connected with the heating apparatus in the boiler, into which the water after
it has been sufficiently heated in the steam space of the boiler, will be dis-
charged, allowing the matter thrown in suspension, by reason of the water
being raised to a high temperature, to settle. The settling-chamber is con-
nected with a coil, this coil being placed in a suitable tank, through which flows
the incoming cold water, which is thus heated before going into the apparatus
in the steam space of the boiler.
The tank containing the coil is arranged in convenient proximity to, or may
be placed within, a second or storage tank into which the water from the coil
is conveyed and from which the heated and purified water is drawn as required.
In carrying out my invention I at present provide within one (supply)
portion of a partitioned storage tank, a coil provided with a discharge pipe,
which delivers water passing upwards and through the coil into the other
(storage) portion of the tank.
This tank is provided within its coil-containing portion with a water-supply
pipe and an outlet pipe, the latter leading to the water heating and purifying
apparatus contained within the steam space of a boiler; suitable cocks and an
injector may be provided upon this outlet pipe, and the injector which commu-
nicates with and receives its steam from the boiler, forces water from this pipe
into the aforesaid heating apparatus.
The heating and purifying apparatus in the steam space of the boiler consists
of a series of connected pipes or a coil through which the water may be con-
veyed and in which it can be heated to the required degree. Another pipe leads
from the apparatus in the steam space of the boiler to a settling vessel and
preferably ends near or is led down towards the bottom of this latter. From
the upper part of this settling vessel a pipe leads up to the coil contained in
D

page_text: the water-supply tank, and passes through and along the pipe conducting water
from the tank to the purifying apparatus in the boiler.
This enclosed pipe before entering the water-supply pipe is furnished with a
suitable check valve.
Improvements in and relating to Water Heating and Purifying for
Steam Boilers.
I, JAMES EDMUND CARROLL, of 395, Oxford Street, in the Administrative
County of London, Gentleman, 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 method relates to improvements in heating and purifying feed-water for
steam boilers.
My invention has for its object, the provision of a special apparatus for sup-
plying steam boilers with heated water practically pure, so as to prevent incrus-
tation or the forming of scale in steam boilers, and also for the eliminating of
any grease, oil, or matter that may be in suspension in the water, as well as
of the scale-forming salts in solution in the water.
The apparatus which I employ comprises a water-heating apparatus composed
of a number of pipes of sufficient heating surface, placed in the steam space
of a boiler, so as to raise the temperature of the water sufficiently to throw
down into suspension the lime-salts or scale-forming matter in solution whence
they can be blown off at intervals through a discharge pipe, steam being
admitted to the coil or pipes through a steam pipe for this purpose, and a
chamber connected by means of a connecting pipe with the heating apparatus
in the boiler, into which the water after it has been sufficiently heated in the
steam space of the boiler, will be discharged, allowing the matter thrown in
suspension, by reason of the water being raised to a high temperature, to settle.
This settling chamber is connected by means of a pipe with a coil (not shewn
on drawings) arranged in a suitable tank, through which flows the incoming
cold water through an inlet pipe, which water is thus heated before going into
the apparatus in the steam space of the boiler.
The tank containing the coil is arranged in convenient proximity to, or may
be placed within, a second or storage tank into which the water from the coil
is conveyed and from which the heated and purified water is drawn as required.
Referring to the accompanying drawings, Figure 1 is a longitudinal section
through the boiler. Figure 2 is a front elevation of the boiler and tank.
Figure 3 is a plan shewing the general arrangement of the apparatus.
In carrying out my invention I provide the tank D or the coil-containing
portion thereof, with an inlet pipe d'and an outlet pipe E, the latter leading to
the water-heating and purifying apparatus a a contained within the steam space
of a boiler A; suitable cocks and an injector may be provided upon this outlet
pipe E, and the injector which communicates with and receives its steam from
the boiler, forces water from this pipe E into the aforesaid heating apparatus,
or the water may be driven through the pipe d and tank D by means of a
suitable pump.

page_text: The heating and purifying apparatus in the steam space of the boiler consists
of a series of connected pipes a a or a coil through which the water may be
conveyed and in which it can be heated to the required degree. A pipe B
leads from the apparatus in the steam space of the boiler to a settling vessel C
and preferably ends near or is led down towards the bottom of this latter; the
precipitated salts are driven out at intervals from the purifying apparatus
through a pipe G by the admission of steam through the pipe g to the coil or
the pipes a, and any sediment in vessel C may be drawn off periodically from
the bottom. From the upper part of this settling vessel a pipe e leads up
to the coil (not illustrated) contained in the tank D from which the purified
and cooled water passes through and along the pipe F to the storage tank.
Or in lieu of the above I may arrange for the pipe c or a branch thereof to
communicate direct with one or more boilers, so as to furnish a supply of heated
and purified water thereto.
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). Apparatus consisting of a tank enclosing a coil and fitted with inlet and
outlet pipes, the latter leading to a water-heating and purifying apparatus
situated in the steam space of a boiler, a blow-off device being attached to such
purifying apparatus, a settling vessel connected with said heating apparatus by
means of a pipe, and a delivery tube from the settling tank for the heated and
purified water, substantially as herein described.
(2). The improved apparatus for heating and purifying water for steam
boilers, constructed, combined and arranged, as described and illustrated on the
accompanying drawings.