An Improved Apparatus for Heating Feed-water and other Fluids.
Year: 1890

page_text: Date of Application, 9th July, 1890-Accepted, 4th Oct., 1890
COMPLETE SPECIFICATION.
An Improved Apparatus for Heating Feed-water and other Fluids.
I FRANCIS HENRY ASBURY of 454 Collins Street Melbourne in the Colony of
Victoria Australia Ventilating Engineer do hereby declare the nature of this inven-
tion and in what inanner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
This invention has been devised for the purpose of providing a cheap easy and
reliable means of heating feed water for steam boilers (or other fluids) by utilizing
waste or exhaust steam or heat from other sources.
By the use of my invention in factories where steam engines and boilers are in use
a saving in the use of coal will be effected as by utilizing what is generally a waste
product I can heat up the feed water for the boilers to a considerable degree of
temperature and thus enable the generators to give greater evaporative results. This
I do by means of a peculiarly constructed system of coil pipes, set in sections, and so
arranged that exhaust steam is continually surrounding the whole of their outer
surface and communicating the required heat to the feed water or other liquid which
is being forced through the interior of the said coil pipes.
Reference may now be made to the accompanying drawings in which
Fig. 1. shows a plan in section, whilst Figs. 2 & 3. are sectional elevations of the
apparatus.
In these drawings similar letters denote corresponding parts.
A is the exhaust pipe to lead away the steam after it has passed through the heater,
B being an outlet pipe for the heated water; C represents the inlet pipe for the cold
water to enter the apparatus by; D shows the inlet pipe leading the steam into the
heater, and E is a scour pipe for running dissolving fluids or chemicals through the
coil. F are the worms or coils of piping through which the feed water is pumped and
which are connected at the top and bottom by branched headers F' leading respec-
tively the one from the cold water supply pump pipes C, and the other to the pipes B
connected with one or more boiler check valves. The coil F is composed of suitable
metal tubes, connected together by metal return bends, (bored and tapped) the said
bends being distended in such a manner as to give the pipes, when screwed in, a
spread or incline. The tubes and bends are put together by means of right and left
threaded screws and are built up in groups or sections and then the whole are
adjusted into one system by the branched headers at the top and bottom F before
mentioned. Near the top of the apparatus and over the coil F are placed two or more
baffle plates which are provided to more evenly distribute the exhaust steam in the
chamber. H represents the side plates of the tank or casing in which the apparatus
is fitted;
J being the top and bottom plates of same and J¹ the bolts and nuts
joining H and J together.
Fig. 3 shows each group or section to contain 20 tubes whilst Fig. 2 shows eight of
these sections but I do not confine myself to that size as the system may be reduced or
amplified to suit requirements.
The attachment É is provided for the purpose of enabling chemicals to be supplied
into the feed water of the boiler for obviating or removing scale formations in either
the tubes of the heater or in the boiler. At the bottom of pipe D is a small
outlet pipe D¹ for allowing any condensed water and impurities to escape from the
tank H.
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. In feed water heating appliances to steam boilers, the use of metal pipe coils or
worms, built in sections and contained in a tank (through which a current of exhaust

page_text: steam or other waste heat is made to pass) and fitted together by right and left
threaded screws and return bends, and terminating at both ends in branched headers
or distributors which join all the different sections into one system of box coils; the
said bends being so twisted as to cause the tubes to maintain a staggered or irregular
position in their group or section, and also distended enough to make the tubes lie
with an incline throughout, substantially for the purposes herein before described and
as illustrated on the accompanying drawings.
2. The use of a scour pipe and stop cock attached to the worm of a feed water
heater to enable scale dissolving fluids and chemicals to be supplied to the feed water
as explained and illustrated.
Dated this Second day of June 1890.
F. H. ASBURY.