Year: 1888

page_text: Date of Application, 17th Nov
1888
Complete Specification Left, 27th Apr., 1889
Complete Specification Accepted, 8th June, 1885
We PIERRE AUGUSTE GUION, of 17 Boulevard St. Marcel, Paris, Engineer and
JAMES THOMAS KNIGHT of 125 Rue d'Allemagne, Paris, Mechanical Engineer, do
hereby declare the nature of this invention to be as follows:-
Our invention relates to a feed water heater and purifier which acts also as a scum
remover for steam boilers.
Reference is to be had to the accompanying drawings forming part of this
Specification in which figure 1 represents à longitudinal section, figures 2 and 4 end
elevations figure 3 a plan and figure 5 a cross section of the feed water heater and
purifier and scummer. The same letters of reference indicate the same parts in all
the figures.
The apparatus consists of a zigzag series of superposed inclined tubes placed within
the boiler and connected at the lower part with the feed pipe and terminating at the
upper part in a discharge mouth situated partly above and partly beneath the water
level of the boiler. The apparatus is constructed in sections bolted together and the
tubes are preferably of oblong or flattened form in cross section and are in contact on
all sides with the water in the boiler.
The
The feed pipe is connected with the lowest section b by a junction pipe a.
intermediate sections c may vary in number according to size of boiler. The top
section d terminates in a swan neck e terminating in a mouth of suitable form and
dimensions through which the feed water is delivered either into the water or steam
space of the boiler or by preference partly in each, so as to remove the scum from the
surface of the water.
The apparatus is preferably supported within the boiler upon cross bars.
The feed water supplied either by a pump or injector circulates upwards through
the several sections and is delivered through the swan neck e in a broad stream at the
water level in the boiler.
The feed water in circulating through the apparatus is raised nearly to the
temperature of the boiler, and deposits in its traverse all the salts it contains. The

page_text: inclined position of the tubes facilitates the discharge of the impurities which are
blown out by opening a purge cock on the feed pipe between the boiler and the check
valve.
1
AT
L 1000
P. A. GUION.
J. T. KNIGHT.
By A. M. & Wm. Clark,
53, Chancery Lane, London;
Patent Agents.
An Improved Feed Water Heater and Purifier for Steam Boilers.
We, PIERRE AUGUSTE GUION of 17 Boulevard St. 'Marcel, Paris, Engineer and
JAMES THOMAS KNIGHT of 125 rue d'Allemagne, Paris, Mechanical 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:-
Our Invention relates to a feed water purifier for steam boilers or generators which
operates in the interior of the said boilers or generators and delivers the water in
a purified condition at a temperature approaching that of the live steam in the
boiler.
And in order that our Invention may be fully understood we shall now proceed
more particularly to describe the same and for that purpose shall refer to the several
figures on the accompanying sheet of drawings the same letters of reference indicating
corresponding parts in all the figures.
Figure 1 represents in longitudinal section a feed water purifier constructed
according to our Invention arranged in the cylindrical body of a boiler or steam
generator. Figure 2 shews the purifier separately and in side elevation. Figure 3 is
a view of that end of the apparatus where the water leaves the purifier to mingle
with the water in the boiler.
Figures 4, 5 and 6 illustrate on a larger scale the parts employed to connect the
ends of the series of superimposed inclined tubes in which the water is purified.
Figure 4 represents one of these parts in section. Figure 5 is a front view and
Figure 6 is a plan of the same. Figure 7 shows the cover plate of a hand hole
provided in these parts. Figure 8 represents a swan neck or bent pipe hereinafter
referred to. The apparatus consists of a zig zag series of superimposed inclined

page_text: C
tubes cc preferably of oblong or flattened form. The feed water is supplied
to these tubes through a feed pipe 6 which is open or shut by the action of a valve d
and communicates with the lowest tube or section c. of the purifier by means of a
junction pipe a. The water is forced into the boiler by any suitable means such as an
injector or feed pump, it enters the purifier through the valve d passes through the
pipe 6 and the bent pipe a and passes upwardly through the series of tubular passages
or sections e c¹³ce in succession and is finally discharged into the water in the
boiler preferably in the form of drops by dripping from a funnel E communicating
with the uppermost section or tube c' of the purifier. The tubular sections c any
suitable number of which may be employed according to the size of the boiler and the
nature of the water to be purified, are held in position by flanged cast iron boxes or
casings m inade in two parts one half of each box being connected to one tube cas
seen in Figures 1 and 2 and communicating through an orifice n with the other half
which is connected to the adjacent tube. The boxes m at each end of the apparatus
are firmly secured in position by tension rods or bolts h and flanges i or the required
pressure may be applied at each joint separately.
The feed water circulating upwards through the several sections or tubes of the
purifier comes in contact with an extension heating surface in proportion to the
relatively small volume of water which traverses the purifier. Consequently this
water has its temperature immediately raised to a high temperature approaching that
of the water in the boiler and the salts with which the water was charged are
deposited in the passages in the purifier. The angle or inclination at which the tubes
or sections c are placed facilitates the deposition and removal of the salts or
impurities.
We do not claim the process of purifying the water, but our invention consists in
the construction and arrangement of the apparatus. The plates or covers o' illustrated
in plan and elevation in Figure 7 employed to close the hand holes o in the boxes m
can be removed when it is necessary to scrape or thoroughly cleanse the internal
surface of the tubes or passages in the purifier but the apparatus may be cleared on
ordinary occasions by simply closing the feed valve d and opening a purging or
cleansing valve (Figure 1) the pressure of the boiler then causes the water to flow
through the purifier in the opposite direction and by thus reversing the circulation
the passages are instantly cleansed. This cleansing or purging must be performed
more or less frequently according to the nature of the water.
In place of causing the tubes to discharge the water into the boiler through the
funnel E which scatters the water in drops a swan neck or pipe curved as indicated
in Figure 8 may be employed but we prefer to employ the funnel E represented in
figure 1.
The purifying apparatus is supported on legs f inside the boiler as seen in
figures 1, 2 and 3 and is composed of separable parts or sections which can be
conveniently passed through the man hole and afterwards connected together in the
interior of the boiler. This improved apparatus being directly connected to the
supply pipe does not necessitate making any special holes or openings in the shell of
the boiler.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
First. For purifying the feed water of steam boilers or generators an apparatus
composed of a series of tubes of circular, elliptical or rectangular form in transverse
section substantially as herein before described and illustrated in the accompanying
drawings.
Second. In feed water purifiers for steam boilers or generators operating in the
interior of the said boilers or generators the arrangement of ascending tubes or
sections of circular elliptical or rectangular form in transverse section in which the
water is caused to circulate in an upward direction substantially as hereinbefore
described.

page_text: Third. In feed water purifiers for steam boilers or generators operating inside the
said boilers or generators or at or near the temperature of the live steam in the Boiler
the arrangement for obtaining an upward circulation of the feed water and spreading
or enlarging the discharge orifice in the form of a funnel so as to deliver the water in
the form of drops falling in the upper part of the boiler substantially as hereinbefore
described.
Fourth. The arrangements and combinations of parts constituting the improved
feed water purifier for steam boilers substantially as hereinbefore described with
reference to the accompanying drawings.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London,
Agents.