Improvements in Apparatus for the Purification and Heating of Feed Water for Steam Generators.
Year: 1899

page_text: Improvements in Apparatus for the Purification and Heating of Feed
Water for Steam Generators.
▾
I, HENRY HOCKING, of York 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 combined filtering and heating apparatus used
in connection with the feed water of steam generators, by which such water is
purified or ridded of grease and other objectionable matters, as well as heated to
a high temperature, prior to its delivery to the steam generator.
According to the present invention, a case or body of cylindrical or other suit-
able form (and say vertically disposed), is common to the filtering part and to
the heating part; and in the upper part, the filtering body, such as a cartridge
of filtering material, or other suitable filtering part or body is disposed and fixed;
while in the lower part, separated by a diaphragm from the upper, the heating
medium, say a coil or coils, adapted to have steam passed through it, is disposed;
and extending from this diaphragm or upper part to the bottom, or near the
bottom of the lower part, is a pipe or conduit by which the water passing from
the upper to the lower part has, before entering the lower part proper, to pass
down to the bottom thereof.
On the conduit leading the feed water to the filter, namely, the upper part, is
a by-pass valve arrangement, one passage leading to the filtering chamber or
space, and the other to the by-pass pipe by which the water does not pass through
the apparatus; and in connection with this pipe, and on the upper part of the
lower heating chamber, another valve and conduit is provided, which leads into
the feed outlet, which is common with the by-pass passage.
In action, the feed water passes the inlet valve into the upper filter chamber,
and then down through the descension conduit or pipe therefrom to the lower
heater chamber, wherein it is heated; and rising up herein, passes by way of
the valve and branch at the upper part, to the feed outlet, which, is common
with the by-pass valve. When the by-pass is used, the by-pass valve is open
and the other closed, and the water passes direct through the feed outlet pipe
referred to, to the boiler.
One advantage and effect of the apparatus, (amongst others), is, that the heat
of the steam in the heater portion, is prevented from heating up the filter part
when, say, the machinery is stopped, and driving the oil or grease back into the
water, which would otherwise happen, and generally detrimentally affecting the
working of the apparatus.
The apparatus can have a suitable cover or covers or doors, for opening it
and obtaining access to it for any desired object.

page_text: Improvements in Apparatus for the Purification and Heating of Feed
Water for Steam Generators.
I, HENRY HOCKING, of York 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 combined filtering and heating apparatus used
in connection with the feed water of steam generators, by which such water is
purified or ridded of grease and other objectionable matters, as well as heated to
a high temperature, prior to its delivery to the steam generator.
The invention will be described in connection with the annexed drawings,
which illustrate my improvements. In these, Figures-1-and-2 are longitudinal
sections shewing two modifications of the apparatus.
In the drawings, a represents the casing of the apparatus, which is common
to the filtering part, and to the heating part; b, 6', are upper and lower covers
respectively, enclosing the two ends of the casing-and.c.is.a diaphragm separating
the casing into the two chambers. In one of these chambers, the filtering medium
or body d is placed and held; while in the other chamber the heating surface c
for heating the water after it is passed through the filtering medium is placed;
and extending from the diaphragm c to a point near the end of this latter
chamber, is a pipe or conduit f, by which water passing from the filtering.
chamber to the heating. chamber is removed or carried away from the filtering
chamber, and the access of boiling or hot water to the filtering material, when
the apparatus is at a standstill, or in like circumstances, is prevented.
In the drawings, the filtering material d-which will be of any known suitable
kind is in the form of an annular cartridge, the core of which is a perforated
tube d; and one end of this tube fits over a ring on a plate c¹ on the diaphragm c,
with which it makes a joint. In a socket, also on this plate, the tube f is also
fitted and connected.
The heating surface e consists of a spiral tube or coil; and the steam enters it
by way of the valve e', the condensed water passing away by the outlet e².
h is the branch on the filtering chamber portion of the case a, for the inlet
of water to be purified and heated; and is the outlet branch on the heating
chamber portion of the case a, for the discharge of purified and heated water.
j is an aperture for the outlet of air; and k is a blow-down outlet.
"
"
In connection with the inlet and outlet branches h and i, a suitable by-pass
valve arrangement of any suitable kind will in most cases be employed, for
supplying water from the feed pump to the steam generator by way of the
apparatus, or direct to the steam generator, without passing through the apparatus
as and when desired. The feed water enters the apparatus by the branch h,
passes through the filtering material d into the perforated pipe d, and thence
flows, by way of the pipe f, to a part of the heating chamber away from the filter-
ing material, viz., the end furthest from the filtering chamber; and then over the
heating coile and out by the branch i. The effect of preventing the water
heated by the surface e from having access to the filtering portion is, that in case
of the machinery being stopped, the grease contained in the filtering medium
cannot be driven out of it by such hot water, and consequently will not, under
such circumstances, be carried forward by the water afterwards to the boilers.
In the modification shewn in Figure 1, the filtering chamber is at the upper-
most part of the apparatus, and the heating chamber below; whereas in the
modification shewn in Figure 2, this arrangement is inverted, and the filtering

page_text: chamber is below, and the heating chamber above. In both cases, the same
characteristic as regards the protection of the filtering body from being acted
upon by boiling or hot water, when the machinery is stopped, or under analogous
conditions, is secured, as the water, after being heated, cannot get access to or
will not flow to the filtering medium or body. In a further modification of
the latter arrangement, the tube f, if desired, may be dispensed with, and the
outlet branch for the heated purified water, would be at the upper end of the
heating chamber and casing a.
In the example of the apparatus under this invention shewn in and set forth
with reference to the drawings, only a single coil of heating tube, and a con-
centric arrangement of parts, has been given; but the invention, it will be under-
stood, is not restricted to these, and may differ and vary as to particular form and
arrangement of parts without departing from the invention. Also, the invention
may be applied to combined purifying and heating apparatus in which the filter-
ing medium is of different kinds or types to that particularly shewn and specified.
The apparatus, however, comprising the parts arranged and constructed as shewn
and specified, is advantageous, inasmuch as it offers a simple, convenient, inex-
pensive, and highly efficient apparatus, irrespective of the advantage, or advant-
ages hereinbefore more particularly referred to.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. The herein described improvement in apparatus for the purification and
heating of feed water for steam generators, namely, an apparatus comprising a
filtering portion, and a heating portion, constituted substantially as one article
or apparatus, and having the parts arranged so as to prevent the access of the
water which has been heated by it, to the filtering medium; for the purposes
set forth.
2. Apparatus for the purification and heating of feed water for steam genera-
tors, having parts arranged, combined, and adapted to operate, as herein described.
3. The feed water purifying and heating apparatus, comprising the case common
to the purifying and heating parts, the diaphragm separating said parts, the
inner tube extending from said diaphragm to near the opposite end of the
apparatus, and the heating coil and inlet and outlet; as shewn in and set forth
with reference to the drawings.
Dated this 15th day of February 1000
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents, 15, Water Street, Liverpool.