IMPROVE- MENTS IN APPARATUS FOR HEATING FEED WATER FOR STEAM BOILERS APPLICABLE ALSO TO OTHER PURPOSES to be as follows:
Year: 1884

page_text: I JOHN KIRKALDY of 40 West India Dock Road Poplar in the County of
Middlesex Engineer do hereby declare the nature of my invention for "IMPROVE-
MENTS IN APPARATUS FOR HEATING FEED WATER FOR STEAM BOILERS APPLICABLE
ALSO TO OTHER PURPOSES to be as follows:-
"
This Invention has for its object improvements in apparatus for heating feed
water for steam boilers applicable also to other purposes.
For this purpose I cause the feed water in its passage from the feed pump to the
boiler to be passed through a cylinder within which are a number of tubular worms
or helical coils of tube heated by steam from the steam boiler (or it might be by
exhaust steam from a steam engine) being allowed to pass through them. The
tubular worms I make alternately right and left handed so that they may be made
to interlock with one another and thereby allow of a greater number of tubes being
congregated together in a small space as described in the Specification of a Patent
applied for by me N° 7200 in the present year. The ends of the tubes forming
these worms are passed through the end plates by which the ends of the cylinder
are closed in and at each end of the cylinder they are made to open into a steam
chamber. The feed water is admitted to one end of the cylinder through a supply
pipe passing centrally through the steam chamber which is at that end of the
cylinder and is allowed to pass away through a pipe led off from the centre of the
other end of the cylinder through the other steam chamber. A steam supply pipe
supplies steam from the boiler to the steam chamber at one end of the cylinder and
any water arising from the condensation of steam in the tubular coils is allowed to
pass away from the steam chamber at the other end of the cylinder.
In this way the feed water can readily be heated to temperatures above the
boiling point before it enters the boiler.
The tubular coils I form preferably from solid drawn tubes corrugated
longitudinally but they might be formed from tubes of other form.
This apparatus may also be used for cooling the fluids and gases.

page_text: I JOHN KIRKALDY of 40 West India Dock Road Poplar in the County of
Middlesex Engineer do hereby declare the nature of my invention for "IMPROVE-
MENTS IN APPARATUS FOR HEATING FEED WATER FOR STEAM BOILERS APPLICABLE
ALSO TO OTHER PURPOSES" 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 apparatus for heating feed
water for steam boilers applicable also to other purposes.
For this purpose I cause the feed water in its passage from the feed pump to the
boiler to be passed through a cylinder within which are a number of tubular
worms or helical coils of tube heated by steam from the steam boiler (or it might
be by exhaust steam from a steam engine) being allowed to pass through them.
The tubular worms I make alternately right and left handed so that they may be
made to interlock with one another and thereby allow of a greater number of tubes
being congregated together in a small space (as described in the Specification of a
Patent applied for by me N° 7200 in the present year). The ends of the tubes forming
these worms are passed through the end plates by which the ends of the cylinder
are closed in and at each end of the cylinder they are made to open into a steam
chamber. The feed water is admitted to one end of the cylinder through a supply
pipe passing centrally through the steam chamber which is at that end of the
cylinder and is allowed to pass away through a pipe led off from the centre of the
other end of the cylinder through the other steam chamber. A steam supply pipe
supplies steam from the boiler to the steam chamber at one end of the cylinder and
any water arising from the condensation of steam in the tubular coils is allowed to
pass away from the steam chamber at the other end of the cylinder.
In place of steam being passed through the tubular coils and the feed water
through the casing the operation might be reversed and the steam be passed through
the casing and the feed water through the coils. The steam used for heating the
feed water might also be exhaust steam from a steam engine instead of steam drawn
directly from the steam boiler. In this way the feed water can readily be heated
to temperatures above the boiling point before it enters the boiler.
The tubular coils I form preferably from solid drawn tubes corrugated
longitudinally but they might be formed from tubes of other form. This apparatus
may also be used for cooling fluids and gases.
Figure 1 is an elevation partly in section of my apparatus constituting a feed
water heater but applicable also to other uses.
Figure 2 is a transverse section of the same.
a a is a cylindrical casing, it is closed at each end by an inner cover b which has
a cylindrical neck 61 projecting outwards from its centre. On the exterior of each
cover bis an outer cover c arched so as to form an enclosed chamber c¹ between
itself and the cover b. The chamber c' at one end communicates with the
corresponding chamber at the other end by coiled tubes d d the ends of which are
fixed into the covers b. The tubular coils are alternately right and left handed as
shown so that by interlocking they may be contained in a smaller space.
The necks b' pass through the covers c and each neck has a screw thread cut on
its end on to which a flanged nut e is made to screw as shewn at Figure 1. The
nut bears upon the exterior of the cover c and forms a tight joint between it and
the neck b¹ Steam is admitted to one of the chambers c¹ by a connection at c² and
water produced by the condensation of steam in the pipes d passes off from the
other chamber c¹ by a connection at c³ to a hot well or tank from which it may be

page_text: pumped back to the boilers. The feed water enters the apparatus at 6² at one end
of the apparatus by a pipe secured at that end to the flange of the nut e and passes
away to the boiler through another pipe secured to the flange of the nut e at the
opposite end of the apparatus.
By constructing the apparatus in this manner it can readily be applied to the
feed water pipe of the boilers of steam engines already erected simply by cutting
out a length of the pipe and putting the apparatus into the place of the length so
removed.
When the feed water is to be beated by exhaust steam from a high pressure
steam engine I prefer to pass the feed water through the coiled tubes & and the
steam through the casing a.
Figures 3 and 4 shew an apparatus for heating the feed water in this way.
Figure 3 is a side elevation partly in section and Figure 4 a plan view partly in
section of the apparatus.
The parts are marked with the same letters of reference as in Figures 1 and 2.
The necks b' are shewn to be prolonged inwards for a distance into the interior of
the casing a and closed at their inner ends so that the steam as it enters and
leaves the casing has to pass through holes formed in the sides of the inward
prolongations of the necks and cannot pass in a straight line directly through the
casing.
An outlet f for water produced by the condensation of steam is also provided at
the lower part of the apparatus. The exhaust steam pipe from the engine is
connected to the end 6 of the apparatus and any steam uncondensed in the casing a
passes off from the opposite end to the air.
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. A feed water heating apparatus for the boilers of steam engines constructed
in such manner that the feed water in its passage from the feed pump of the engine
to the boiler is heated by being brought into contact with pipes to which steam is
supplied directly from the boiler substantially as herein before described.
2. In feed water heaters and other heaters or coolers the combination of a
cylindrical casing with end covers beach having a tubular neck extending
outwards from it and of hollow or dished covers c forming annular chambers c¹
surrounding these necks and nuts e screwing into the end of the tubular necks to
form tight joints between the tubular necks and the covers c also of coiled tubes d
passing from one annular chamber c' to the other and of an inlet or outlet from
each chamber substantially as described.
of Andahan 700A
CARPMAEL & Co.,
Agents for the Applicant.