Improvements in Heating and Circulating Feed and other Water in the Boilers of Steam Engines.
Year: 1888

page_text: Date of Application, 9th Apr., 1888
Complete Specification Left, 4th Jan., 1889
Complete Specification Accepted, 5th Feb., 1889
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Improvements in Heating and Circulating Feed and other Water
in the Boilers of Steam Engines.
I ALEXANDER MAO LAINE of No. 1 Queens Elms, Belfast, in the County of
Antrim, Shipowner, do hereby declare the nature of this invention to be as follows:-
I heat the feed water of Steam engine boilers by conducting it after its entrance
into the boiler through a series of sinuosities or convolutions formed in the feed water
pipe and placed in the upper part of the boiler, by preference in the steam spaco and
secured to the boiler stays therein. The feedwater. in its progress through said series
of sinuosities or convolutions gradually becomes heated to a temperature approaching
that of the steam in the steam space, and 1 then conduct the hot feed-water in one or
more pipes down to nearly the bottom of the boiler where the feed-water is discharged
and tends to heat the comparatively cold water there, and by preference I utilize this
hot feed-water to create an upward current and circulation in the water of the boiler
in the manner following viz. :-
I arrange near the bottom of the boiler one or more feed-water discharge nozzles
with hollow cones or other injector apparatus, so arranged that the feed-water current
or currents will induce an additional volume of the surrounding water to move along
with the feed-water upwards and create circulation in the boiler by the colder water
near the bottom of the boiler being drawn towards the feed-water current or currents
and carried upwards towards the surface of the water in the boiler, and I may
combine all or part of the apparatus as aforesaid with my Feed-water Heater as described
in my patent No. 3701. of 11th March 1887 or with any Feed-water Heater placed
outside the boiler in which the steam supply for heating the feed-water comes into
direct contact with and mixes with the feed-water; and I declare that I do not limit
myself to the precise details as aforesaid.

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in the Boilers of Steam Engines.
•
I ALEXANDER MAC LAINE of No. 1 Queens Elms Belfast in the County of Antrim
Shipowner do hereby declare the nature of this invention and in what mannor the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
I heat the feedwater of steam engine boilers by conducting it after its entrance into
the boiler through a series of sinuosities or convolutions formed in the foedwater pipe
or pipes and placed in the upper part of the boiler by preference in the steam space
and secured to the boiler stays therein.
The feedwater in its progress through said sinuosities or convolutions gradually
becomes heated to a temperaturo approaching that of the steam in the steam space and
I then conduct the hot feed water in one or more pipes down to nearly the bottom of
the boiler where the feed water is discharged and tends to heat the comparatively cold
water there, and by preference 1 utilize this hot feedwater to create an upward
current and circulation in the water of the boiler in the manner following viz.;.1
arrange near the bottom of the boiler one or more feed water discharge nozzles with
hollow cones or other injector apparatus so arranged that the feedwater current or
currents will induce an additional volume of the surrounding water to movo along
with the feedwater upwards and create circulation in the boiler by the colder water
near the bottom being drawn towards the feed water current or currents and carried
upwards towards the surface of the water in the boilers,-I may combine all or part of
the apparatus as aforesaid with my Feedwater Heater as described in my Patent
No. 3701 of 11th March 1887, or with any Feedwater Heater placed outside the
boiler in which the steam supply for heating the feedwater comes into direct contact
with and mixes with the feedwater, and in order that my said Invention may be more
fully understood and comprehended, I shall now proceed to refer to the drawings
upon the sheets hereunto annexed in which the same letters or figuros refer to the
same or corresponding parts throughout.
Figs. 1 and 2, sheet 1, are longitudinal and transverse sections of a singlo ended
high pressure marine boiler, fitted with a series of sinuous feed pipes forming one
arrangement of my Invention and Fig. 3. sheot 1, is a plan of the sinuous feed pipes
connected together by preference by an initial feedwater receiver made in any
convenient form for distributing the feedwater into the sinuous pipes. In this case
the receiver marked, a is a cast iron pipe bracketed or otherwise secured to the boiler
stays b. b. b. the ordinary feedwater pipe C., conveying the feedwater into the boiler, is
connected to the receiver at d. and the feed water enters the receivor at that point
and leaves it in three streams which enter the sinuous feed pipes at e. e. e. passing
through the sinuous feed pipes f. ff. in which the feedwater gradually becomes
hotter as it proceeds, until arriving at the points g. 9. g. it is conducted towards
the bottom of the boiler by the pipes h. h. h. down to the Induction apparatus k. k. k.

page_text: through which it passes and flows upwards bringing with it the colder water
round the bottom of the Induction apparatus, of which an enlarged
sectional view is shown in Fig. 4 sheet 1, in which 1. is an outer shell
or casing with an open top and m is an inner cono also with an open top,
through both of which the hot feed water current, from the turned up nozzle of the
feed pipe, ascends drawing with it the colder water, inducted into the apparatus,
through the bottom apertures n. n. n. and thereby creating circulation of the water in
the boiler, the exact shape and form of this Induction apparatus is not material and
admits of alterations in details to effect the result as described ;-By preference the
initial receiver, and Induction apparatus aforesaid are composed of cast iron, and the
feed pipes of Malleable iron.
Figs. 5 & 6 sheet 2, are longitudinal and transverse sections of the same boiler as
shown in Figs. 1 and 2 sheet 1, but fitted with a convolution feed pipe; in this
instance, in the shape of a single coil of foed pipe marked O in the drawing, the
feed water from the ordinary feed pipe C. enters the coil at P. and passes through the
coil gradually becoming hotter and leaving it at Z. to be taken down to the Induction
apparatus, or not as may be arranged. The feed pipe convolution aforesaid may also
be incorporated, with or form part of a cylinder or casing, so that the feedwater may
travel spirally round the sides of the cylinder or casing and become gradually heated
in the manner aforesaid, and two or more convolutions of feed pipes or two or more
cylinders or casings as aforesaid may be fitted, and the feed pipes may be made round
or quadrangular or of any other suitable form.
Having now described the nature of my said Invention and the manner in
which the same is to be performed I declare that what I claim is,
1st. The use of Internal Boiler sinuous heating feedwater pipes, substantially as
described and shown upon the drawings hereunto annexed.
2nd. The use of Internal Boiler convolution heating feedwater pipe or pipes,
substantially as described, and shown upon, the drawings hereunto annexed.
3rd. The use of Internal Boiler sinuous or convolution heating feedwater pipes,
combined with the use of Boiler Circulators and Induction apparatus, substantially
as described and shown upon the drawings hereunto annexed and,
4th. The use of Internal Boiler sinuous or convolution heating feedwater pipes
substantially as described, and shown upon the drawings hereunto annexed, combined
with the use of my Feedwater Heater, as described in my patent, No. 3701 of
11th March 1887, or combined with the use of any other Feedwator Heater placed
outside the boiler in which the steam supply for heating the feedwater comes into
direct contact with and mixes with the feedwater.
Dated this Second day of January 1889.