Improvements in Feed Water Heaters and Filters.
Year: 1897

page_text: Improvements in Feed Water Heaters and Filters.
We, JOHN GEORGE KINCAID, of Oakfield, Greenock, Renfrewshire, Engineer, and
WILLIAM CROCKATT, of 21, Hope Street, in the City of Glasgow, Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention has for its object the provision of a feed water filter of improved
construction wherein screened clinker from the boiler furnaces or other similar
suitable material may be employed as a cheap and effective filtering medium for
arresting grease and other impurities in the feed water, and in connection with
which devices are also provided for heating the feed water before filtration and for
withdrawing the air present in the water and freed from it by heat.
The improved filter is composed of a cylindrical or other casing having at top
end a tightly fitted removable cover, and at the lower or opposite end a central
discharge pipe fitted with a rose, over which may be drawn a hood of suitable
material to intercept any trace of grease or grit that may pass through the filter
box.
Over this outlet pipe is fitted a removable annular box of sheet metal or other
light material, and made up of one, two or more compartments preferably con-
centric, and either fitted with a lid held in place by the outer cover of filter, or so
fitted that the outer cover of the filter forms the lid and presses it down against
a watertight joint on bottom of filter.
per-
This box which is adapted to hold the clinker, coke, charcoal, slag or other
suitable filtering medium in a loose mass, may, if of one compartment, be per-
forated at top end or through the lid. If of two or more compartments it may be
forated at the lower part of its outer shell to admit the water from the casing to
the outer compartment and up through the filtering medium to the upper end of
the partition separating the compartments.
The partially filtered water flows over the top of this partition into the next
compartment passing downwards through the filtering material therein and thence
if there be only two compartments flows out through perforations in the lower part
of the inner shell into an annular space round the outlet pipe, into which it escapes
or is drawn; the outlet pipe being preferably connected to the suction of the feed
pump.
If it is required to heat the feed water, then in the water space surrounding the
filter box a number of steam pipes or coils are fitted within the casing, and are
each made preferably of horse shoe form, the ends of the pipes being connected at
one side to a pocket or space into which steam is admitted from an evaporator or
other source while the other ends are connected to an adjoining pocket which
receives water of condensation and may discharge it into the filter casing or directly
into discharge pipe of filter..
The effect of so heating the feed water is to cause separation of the air present
which rises to the surface of the casing of the filter.
To provide for its removal an air vessel is fitted to the upper part of the casing

page_text: the top of which is connected to the condenser. On the top of this air vessel is
likewise fitted an overflow valve lightly loaded with a spring which acts as a tell
tale should the filter be neglected and allowed to get choked.
The filtering medium may be readily renewed after use by removing the cover
of filter casing and withdrawing the filter box which is siniply emptied out and
refilled with clinker or other suitable filtering medium.
A steam connection is provided to the interior of the filter by which the grease
may be blown out of the filtering material and drained away through a cock
at the bottom of the filter casing.
Dated this 14th dove of Anmil 1907
We, JOHN GEORGE KINCAID, of Oakfield, Greenock, Renfrewshire, Engineer, and
WILLIAM CROCKATT, of 21, Hope Street, in the City of Glasgow, 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 the provision of a feed water filter of improved
construction wherein screened clinker from the boiler furnaces or other similar
suitable material may be employed as a cheap and effective filtering medium for
arresting grease and other impurities in the feed water, and in connection with
which devices are also provided for heating the feed water before filtration and for
withdrawing the air present in the water and freed from it by heat.
The invention is illustrated by the accompanying drawings, Figure 1 being a
vertical section of the improved feed water heater and filter, Figure 2 a vertical
section on the line a, Figure 1, and Figure 3 a horizontal section on the
line yy, Figure 1, of the same, parts of the filter being removed for greater
clearness in Figs. 2 and 3.
The improved filter is composed of a cylindrical or other casing A having at top
end a tightly fitted removable cover B, and at the lower or opposite end a central
discharge pipe C the inner end of which is fitted with a rose D, over which may
be drawn a hood of suitable material to intercept any trace of grease or grit that
may pass through the filter box.
Over this outlet pipe C is fitted a removable annular box E of sheet metal or
other light material, and made up of one, two or more compartments preferably
concentric, and either fitted with a lid held in place by the outer cover of filter, or
so fitted that the outer cover B of the filter forms the lid and presses the annular
box E down against a watertight joint F on bottom of filter.
This box E which is adapted to hold the clinker, coke, charcoal, slag or other suit-
able filtering medium in a loose mass, may, if of one compartment, be perforated
at the top end or through the lid. If of two or more compartments it may be per-
forated at the lower part of its outer shell as shewn at E¹, Fig. 1, to admit the
water from the casing to the outer compartment and up through the filtering
medium to the upper end of the partition E2 separating the compartments.
The partially filtered water flows over the top of this partition E³ into the next
compartment passing downwards through the filtering material therein and thence

page_text: if there be only two compartments flows out through perforations E³ in the lower
part of the inner shell into an annular space G round the outlet pipe C into which
it escapes or is drawn; the outlet pipe being connected to the suction or to the
discharge of the feed pump.
If it is required to heat the feed water, then in the water space surrounding the
filter box E a number of steam pipes H are fitted within the casing, and are each
made preferably of horse shoe form, as shewn at Figure 3, the ends of the pipes H
being connected at one side to a pocket or space I into which steam is admitted
from an evaporator or other source while the other ends are connected to an
adjoining pocket J which receives water of condensation and may discharge it
into the filter casing or directly into discharge pipe of filter as shewn at K.
A cylindrical casing L is preferably fitted around the box E, this casing being
perforated only at the top so that the water to be filtered will always cover the
heating pipes H.
The effect of so heating the feed water is to cause separation of the air present
which rises to the surface of the casing of the filter.
To provide for its removal an air vessel M is fitted to the upper part of the casing
the top of which is connected to the condenser. On the top of this air vessel M is
likewise fitted an overflow valve N lightly loaded with a spring 0 which acts as a
tell tale should the filter be neglected and allowed to get choked.
The filtering medium may be readily renewed after use by removing the cover B
of filter casing and withdrawing the filter box E which is simply emptied out and
refilled with clinker or other suitable filtering medium.
A steam connection is preferably provided to the interior of the filter by which
the grease may be blown out of the filtering material and drained away through a
cock Pat the bottom of the filter casing A.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
-
1. A feed water heater and filter constructed substantially as hereinbefore
described.
2. As means for separating oil, grease or other extraneous matter from con-
densed steam or feed water a filter composed of a casing having inlet and outlet
and fitted with a removable annular box filled with clinker, or other filtering
medium through which the water is directed substantially as described.
3. A filter and feed heater composed of a casing having a removable cover, a
central discharge orifice fitted with a rose and over said outlet and secured between
the bottom and cover an annular box containing clinker or other filtering medium
and perforated so that the stream of water is directed through the clinker, and
steam pipes fitted within the casing and around the box to heat the water being
filtered substantially as described.
Dated this 14th day of Januar 1908