Improvements connected with the Purification or Filtration of "Feed- water" of Steam Generators.
Year: 1899

page_text: Improvements connected with the Purification or Filtration of "Feed-
water" of Steam Generators.
I, FRANKLIN HOCKING, of 219, Upper Parliament Street, Liverpool, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention has reference to the filtration or purification of feed water for
steam generators.
At present, in connection with condensing steam engines, the feed water
pumped from the hot well of the condenser, and forced back to the steam
generator, is in some cases, at least, of marine engines, generally ridded of
grease and oil and impurities as far as possible, before it is returned to the
boiler, by passing it through a filtering apparatus, the grease, etcetera, being
deposited in the apparatus.
These apparatus as commonly used, consist of a separate apparatus, adapted
to resist the full pressure of the boiler, with various cocks, bye-passes, gauges.
and safety valves, making, with its connections, a comparatively extensive and
expensive affair.
The object of the present invention is, mainly, to obviate, as far as possible.
a great part of the expense thus entailed; and at the same time to save space.
and to attain simplicity in accomplishing the object of this apparatus.
According to the present invention, the filter appliance-which may be of
the kind or type hereafter referred to, or other suitable construction, is placed
in the steam generator itself, with its interior communicating with the shell
of the boiler, say the boiler front, by a suitable conduit, through which the
impure water is forced by the pump into the interior of the filter appliance;
and it passes from this interior through the filtering medium, into the water
in the boiler direct.
According to one construction, the wall of the appliance containing the filtering
material, is in direct contact with the water, or steam in the boiler; whilst
according to a modification, or another construction, this container or appliance
is disposed within a tubular shell projecting into the boiler, and secured to the
plate in front, and having a valve on or in it, controlled from outside, by which
the flow of water, and its connection with the interior of the boiler is controlled.
In the latter case, the filter container or contrivance is detachable, and can'
be taken out of the shell in which it rests, or fits, in front, in any convenient
way, and replaced rapidly, so that the filtering medium may be changed or
renewed.
In some cases, a branch and valve or cock will be used in connection with the
appliance, by which the reverse flow of water, namely, from the boiler through
the filtering material to the outside, can take place, for cleansing the material:
and suitable cocks may be provided outside regulating the direct or inflow, and
the reverse flow.

page_text: According to one form of filter body, it may be cylindrical or spherical, or
spherically ended, externally, and disposed horizontally, and for any length,
in the boiler. And the filtering material, as coir fibre, matting, sawdust, or
other suitable material, may be contained within the apparatus or appliance,
and the water passed or distributed to it through a perforated tube, or a central
tube, so as to distribute the fluid.
The apparatus or appliance may be constructed and fixed so as to be readily
detachable, so that they can be fixed in place and removed readily. In the case
of it being attached to the boiler front or shell, the connection may be on a
plate such as a manhole plate or cover, so that by withdrawing such plate or
cover, the whole apparatus is withdrawn, and vice versa.
Dated this 15th day of February 1899
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents,, 15, Water Street, Liverpool.
Improvements connected with the Purification or Filtration of "Feed-
water " of Steam Generators.
I, FRANKLIN HOCKING, of 219, Upper Parliament Street, Liverpool, 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 has reference to the filtration or purification of feed water for
steam generators.
At present, in connection with condensing steam engines, the feed water
pumped from the hot well of the condenser, and forced back to the steam
generator, is, in some cases, at least, of marine engines, generally ridded of
grease and oil and impurities, as far as possible, before it is returned to the
boiler, by passing it through a filtering apparatus, the grease, etcetera, being
deposited in the apparatus.
These apparatus, as commonly used, consist of a separate apparatus, adapted
to resist the full pressure of the boiler, with various cocks, bye-passes, gauges,
and safety valves, making, with its connections, a comparatively extensive and
expensive affair.
The object of the present invention is, mainly, to obviate, as far as possible.
a great part of the expense thus entailed; and, at the same time, to save space
and to attain simplicity in accomplishing the object of this apparatus.
According to the present invention, the filter appliance-which may be of
the kind or type hereafter referred to, or other suitable construction, is placed
in the steam generator itself, with its interior communicating with the shell
of the boiler, say the boiler front, by a suitable conduit. through which the
impure water is forced by the pump into the interior of the filter appliance;
and it passes from this interior through the filtering medium, into the water
in the boiler direct.
According to one construction, the wall of the appliance containing the filtering
material, is in direct contact with the water, or steam in the boiler; whilst
according to a modification, or another construction, this container or appliance
is disposed within a tubular shell projecting into the boiler, and secured to the
plate in front, and having a valve on or in it, controlled from outside, by which
the flow of water, and its connection with the interior of the boiler is controlled.
In the latter case, the filter container or contrivance is detachable, and can

page_text: be taken out of the shell in which it rests, or fits, in front, in any convenient
way, and replaced rapidly, so that the filtering medium may be changed or
renewed.
In some cases, a branch and valve or cock will be used in connection with the
appliance, by which the reverse flow of water, namely, from the boiler through
the filtering material to the outside, can take place, for cleansing the material;
and suitable cocks may be provided outside regulating the direct or inflow, and
the reverse flow.
According to one form of filter body, it may be cylindrical or spherical, or
spherically ended, externally, and disposed horizontally, and for any length,
in the boiler. And the filtering material, as coir fibre, matting, sawdust, or
other suitable material, may be contained within the apparatus or appliance
and the water passed or distributed to it through a perforated tube, or a central
tube, so as to distribute the fluid.
The apparatus or appliance may be constructed and fixed so as to be readily
detachable, so that they can be fixed in place and removed readily.
The drawings illustrate one arrangement of my improvements connected with
the purification or filtration of feed water of steam generators, as applied to
Lancashire and similar analogous types of boilers.
In these drawings, Figure 1 is an outside end view of a boiler, shewing the
parts of the filtering appliances which are disposed outside the boiler; and
Figures 2 and 3 are longitudinal section in plan, and cross section, shewing
these parts, and also those within the boiler, to a larger scale.
its
Referring to the drawings, a represents the boiler front plate, and
furnaces, c is the pipe through which the feed water is supplied to the filtering
apparatus; represents a perforated or openwork case within the boiler, con-
taining the filtering medium; e is a conduit or branch connecting one end of
this case with the boiler frontplate a; and f is a valve through which the feed
water to be filtered
h is a by-pass valve be to e, and by which its flow is regulated and controlled.
between the valve f and the pipe e, for supplying feed
water direct to the boiler in case of need. The feed water is distributed to the
filtering medium (which may be of any known suitable kind) in the case <,
through perforated pipes d, fixed in a distributing chamber at the head of
the apparatus. The outer end of the case may be in the form of a hinged cap:
or the cap may be detachably connected to the body in any known suitable
way, to enable the filtering medium or body to be readily put in place, or taken
out for renewal. el is a flange on the pipe e for connecting the apparatus with a
blow-off cock on the boiler, or on a separate pipe.
The case will be supported at its outer end from any part of the boiler in
any suitable way.
In action, normally, the valve h will be closed, preventing the direct flow of
water into the boiler, and the valve f will be opened. The feed water to be
purified thus would pass through the case of the valve h, and the case of f, into
the conduit or branch pipe e; whence it would flow by way of the distributing
chest into pipes d'; from which it would be forced in all directions through
the filtering material in the case d, directly into the water in the steam generator
in which it would be disposed, being purified, of course, whilst passing through
the filtering material.
In case of the filtering material in d being foul, the valve h could be opened,
and f shut; and the blow-off cock connected with the branch e, opened; where-
upon the pressure of steam in the boiler will force the water from the exterior of
the case d'inwards, to the perforated pipes, and out of the boiler, thus cleansing
the filtering medium or body in d, and carrying away the dirt and other
objectionable material through the blow-out cock, and out of the boiler.
As regards the filtering medium or portions proper of the apparatus, this may
be of any of the known forms and types, and also be disposed in the steam
generator in any suitable or desired position; and, of course, in different types

page_text: of steam generators, this position will necessarily vary; and hence, the invention
is in no way restricted to the particular form of apparatus or parts, or their
positions.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is
1. The herein described improvement connected with the purification or filtra-
tion of feed water of steam generators, namely, the disposal of the part of the
filtering apparatus containing the filtering medium or body within the boiler,
and connecting same with the exterior, and with the feed water service by a
suitable branch or conduit, the feed water to be purified being adapted to be
forced through the filtering medium: for the purposes set forth..
2. The herein described improvement connected with the purification or filtra-
tion of feed water of steam generators, consisting of the disposal within the
steam generator of the filtering portion proper, containing the filtering medium
or body, and within the water of the said generator, and the connection of same
with the feed water service through the shell, and a suitable regulating supply
valve, and also with a discharge or reverse flow valve, whereby the said water
to be filtered is forced through the filtering body in supplying the boiler, and
the said filtering body is cleansed and purified by the reverse flow of the water
through it; for the purposes set forth.
3. Apparatus for filtering or purifying feed water of steam generators, com-
prising a part containing the filtering medium or body, disposed within the
generator, and in the water thereof, and connected by a feed branch or conduit
to the front plate, a, of the generator, with controlling valves on the outside of
said plate; substantially as set forth.
Dated this 14th day of November 1800
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents, 15, Water Street, Liverpool.