Improvements in Steam Boiler Feed Water Heaters.
Year: 1890

page_text: Date of Application, 8th May, 1890
Complete Specification Left, 9th Feb., 1891-Accepted, 18th Apr., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Boiler Feed Water Heaters.
I, DONALD BARNS MORISON, of 8, Albion Terrace, Hartlepool, in the County
of Durham, Engineer, do hereby declare the nature of this invention to be as
follows:-
.
My invention relates to apparatus for heating the feed-water of marine or other
boilers by means of steam.
The feed-heater consists of a vessel of cast iron or other suitable material to
which the feed-water is admitted and from which it flows to the feed-pumps after
being heated. The steam to heat the feed-water enters the heater by means of a
pipe which has a suitable continuation within the feed-heater. This continuation
may be perforated slotted or otherwise arranged to ensure efficient condensation
of the steam.
The construction of the heater is such that until the water has risen to a certain
height within the heater it cannot escape by the outlet. This end is attained by
causing the water which leaves the heater to pass over a division plate or its
equivalent. By this means a quantity of water is retained within the heater and
the heating steam is prevented from escaping uncondensed.
A pipe may be led from the top of the heater to the hotwell or to the atmosphere
to prevent an accumulation of vapour within the heater.
This heater is peculiarly suitable for use in connection with an evaporator for
supplying pure auxiliary feed-water, the steam generated together with the water
condensed in the evaporator being led to the heater and utilized for raising the
temperature of the feed-water.
The beater may also be fitted with a float attachment for regulating the flow of
water to the pumps.
COMPLETE SPECIFICATION.
Improvements in Steam Boiler Feed Water Heaters.
I, DONALD BARNS MORISON, of 8, Albion Terrace, Hartlepool, in the County
of Durham, Engincer, 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:-
My invention relates to apparatus for heating the feed-water of marine or other
boilers by means of steam.
The feed-heater consists of a vessel of cast iron or other suitable material to
which the feed-water is admitted and from which it flows to the feed-pumps after
being heated.
The steam to heat the feed-water enters the heater by means of a pipe which
has a suitable continuation within the feed-heater. This continuation may be
perforated slotted or otherwise arranged to ensure efficient condensation of the
steam.
The construction of the heater is such that until the water has risen to a certain
height within the heater it cannot escape by the outlet. This end is attained by
causing the water which leaves the heater to pass over a division plate or its
equivalent. By this means a quantity of water is retained within the heater and the
heating steam is prevented from escaping uncondensed.

page_text: A pipe may be led from the top of the heater to the hotwell or to the atmosphere
to prevent an accumulation of vapour within the heater.
In order that my invention may be clearly understood 1 append two sheets of
drawings to which I now refer.
Figure is a sectional elevation of one form of feed-heater made in accordance
with this invention, and,
Figure is a sectional plan of the same, the section being taken at the
line B.
Figure 1 is a sectional elevation of the heater fitted with a modified form
of internal pipe, and,
Figure IV is a sectional plan of the same, the section being taken at the
line (D.
Figures and VI are respectively elevation and plan of the modified form of
internal pipe.
1 is the outer vessel or casting and is formed with a water supply inlet 2, an
outlet 3, a steam inlet 4, and an outlet for vapour 5.
The steam inlet pipe is continued within the heater by means of the steam inlet
pipe 6 which has slots or apertures 77 for the
of the steam.
escape
In Figures I and II the steam inlet pipe 6 is a plain pipe with slots or apertures
formed in the same so that the steam escapes in a radial direction; but in
Figures III to V1 the steam inlet pipe has the slots or apertures set at a tangential
direction so that the escaping steam ĉanses a rotary motion of the water to be
heated.
The action of the apparatus is as follows:-
The water to be heated enters at 2 and is prevented from escaping until it fills
the heater to the height of the division plate or partition . The heating steam
enters at 4 and issuing from the slots or apertures 7 7 becomes condensed among
and heats the water contained in the heater. Any vapour that may be generated
escapes at 5. The division plate or partition 8 ensures that the slots or apertures 7, 7,
are always covered by water so that the steam cannot escape uncondensed.
A foot or bracket is provided for supporting the heater.
A feed-heater made in accordance with this invention is peculiarly suitable for
use in connection with an evaporator for supplying pure auxiliary feed-water, the
steam generated in the evaporator together with the water condensed in the
evaporator being led to the heater and utilized for raising the temperature of
the feed-water.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
An apparatus for heating feed-water for marine or other steam boilers by means
of steam formed and operating substantially as illustrated and described.
DONALD BARNS MORISON.