IMPROVEMENTS. IN FEED WATER HEATERS FOR LOCOMOTIVE AND OTHER BOILERS
Year: 1885

page_text: I, JOHN KIRKALDY of N° 40 West India Dock Road in the County of Middlesex,
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS. IN
FEED WATER HEATERS FOR LOCOMOTIVE AND OTHER BOILERS" to be as follows:-
This invention has for its object improvements in feed water heaters for loco-
motive and other boilers.
For this purpose I provide a series of helical tubes which may be interlaced or
arranged parallel the one to the other within a casing which serves as the steam
outlet and communicates with the blast pipe.
The tubes which may be corrugated to increase the surface are fixed at their
lower ends into the side of an horizontal pipe passing across the casing and to
this pipe the feed water is supplied by the injectors. The water before entering
the heater passes through a connecting piece in which clack valves are provided
and a perforated plate which serves as a dirt arrester.
4
The upper ends of the helical tubes are in like manner connected to a second
similar horizontal pipe and from this the heated feed water is led away through
another clack valve into the boiler.
The exhaust steam passing through the casing on its way to the chimney imparts
heat to the helical pipes and from these it is absorbed by the feed water.
Where the arrangement is such as to cause a partial condensation of the exhaust
steam such that water is deposited in the casing I provide a drain pipe by which
this water is led away to again serve for feeding the boiler.
In place of arranging the helical tubes in a casing through which the exhaust
steam passes I sometimes dispense with such casing and place the tubes in the
moke box in either side and in such positions as to be efficiently exposed to
the heat of the products of combustion from the flues.
Dated this 10th den ic
'

page_text: Used for other Purposes.
I, JOHN KIRKALDY of N° 40 West India Dock Road in the County of Middlesex
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 improvements in feed water heaters for loco-
motive and other boilers applicable also to condensers coolers and heaters. used
for other purposes.
In a feed water heater for a locomotive I provide a series of helical tubes which
may be interlaced or arranged parallel the one to the other within a casing
which serves as the steam outlet and communicates with the blast pipe.
The tubes which may be corrugated to increase the surface are fixed at their-
lower ends into the side of an horizontal pipe passing across the casing and to this
pipe the feed water is supplied by the injectors. The water before entering the
heater passes through a connecting piece in which check valves are provided and
a perforated plate which serves as a dirt arrester.
The upper ends of the helical tubes are in like manner connected to a second
similar horizontal pipe, and from this the heated feed water is led away through
another check valve into the boiler.
The exhaust steain passing through the casing on its way to the chimney imparts
heat to the helical pipes and from these it is absorbed by the feed water.
Where the arrangement is such as to cause a partial condensation of the exhaust
steam such that water is deposited in the casing I provide a drain pipe by which
this water is led away, to again serve for feeding the boiler.
Condensers, coolers and heaters used for other purposes may be constructed in
the same manner.
Figure 1. of the drawings hereunto annexed shows a front elevation. Figure 2
an end elevation partly in section and Figure 3 a horizontal section of a feed water
heater formed as above described for a locomotive boiler. Figure 4 is a front view
on a smaller scale of the smoke box of a locomotive with one of the feed heaters
fitted within it.-Figure 5 is a longitudinal section of the same.
A is a casing through which steam passing from the cylinders of the engine is
exhausted. Band O are horizontal pipes passing across the casing at top and
bottom. The pipes B at their front end open into a casing D and the pipes C
into a casing E..
Fare helical coils of tube passing from both sides of the pipes B to both sides
of the pipes C. In the drawing each set of helical coils is shewn to be composed
of alternately right and left handed coils interlaced but if desired the coils might
simply be placed side by side without interlacing.
The exhaust steam enters the casing A by the inlet A¹ at the bottom and
passes off by the outlet A' at the top to the ordinary injection blast nozzle in
the chimney

page_text: In Figures 4 and 5 the heater is shown placed within the smoke box of a loco-
motive having a high pressure and low pressure cylinder but it might be similarly
applied within the smoke box of other form of locomotive.
In these figures G is a pipe for conveying steam from the steam boiler to the
valve box of the high pressure cylinder-I is the high pressure cylinder-J the low
pressure cylinder-K a pipe for conveying steam from one to the other-L the
passage by which steam passing from the low pressure cylinder is led to the bottom
of the heater.
The feed water is supplied to the casing E by the pipe E' and passes off from
the casing D to the boiler by the pipe D¹.
Surface condensers and coolers or heaters to be used for other purposes may
similarly be formed of rows of helically coiled tubes branching out from the sides
of main or trunk tubes B and passing to the sides of other main or trunk tubes C
all enclosed within a casing provided with an inlet and outlet and through which
the one fluid which is to be heated or cooled is passed whilst the other fluid to be
cooled or heated is passed through the helical coils.
The trunk tubes B C may be disposed horizontally vertically or in other
position.
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. The construction of a feed water heater for locomotive and other boilers
substantially as described.
2. The combination of the outer casing, provided with an inlet and outlet with
the trunk tube or tubes passing across it at two of its opposite sides (one trunk
tube or tubes serving as the inlet and the other as the outlet for the fluid to be
cooled or heated) and the series of helically coiled tubes passing from both sides of
the trunk tubes at one side or end of the casing to both sides of the trunk tubes at
the other side or end of the casing substantially as described.
3. The construction of heaters and coolers and condensers substantially as
herein before described.