Improvements in Apparatus for Purifying Boiler Feed Water.
Year: 1890

page_text: Date of Application, 17th July, 1890
Complete Specification Left, 16th Apr., 1891--Accepted, 16th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Purifying Boiler Feed Water.
We, CHARLES DE KERPEZDRON and ALBÉRIC GIBAULT both of 1 Boulevard
St. Denis, Paris, France, Engineers, do hereby declare the nature of this invention
to be as follows:-
This invention has reference to apparatus for purifying the feed water of steam
boilers, the said apparatus being placed in the boiler itself and the feed water being
forced through the same.
The purifier is composed of a number of superposed tubes connected at the ends
by elbows or bends and held together by stays. The feed water supply pipe is
connected to the bottom tube, and the top tube, which is fitted with a flap or valve.
discharges the water upon an inclined plate which is submitted to contact with the
steam. The feed water on being forced into the purifier is immediately raised to a
high temperature and owing to a well known law, the salts with which it is charged
become precipitated in the tubes. The water thus deprived of its salts or of a great
portion thereof passes down the inclined plate and becomes completely purified by
depositing thereon the light matters it contains. At the lower end of the inclined
plate is a trough or receiver fitted with a flap or valve and having an outlet by
which it can be put into communication with one of the upper tubes of the purifier.
When it is required to discharge or purge the apparatus of the calcareous or other
matters, the feed or supply cock is closed and a purge cock on a branch of the feed
pipe opened. The upper flap or valve of the purifier will therefore close while the
Hap or valve to the receiver at the bottom of the inclined plate will be open. The
calcareous and other matters will thus be driven out by reason of the boiler
pressure..
When the purifier is adapted to locomotive boilers the tubes are preferably not
superposed.
The prevention of the carrying forward of the salts precipitated in the improved
purifier is effected by the adaptation thereto of tubes of various forms such as a
U-shaped tube with or without a bulb at the bend, or by fitting plates or obstacles
therein, or by automatic beating effected by passing the water over one or more
small beaters with vanes.
In order to collect precipitated salts there can be placed in the boiler a collector
composed of a coil or serpentine through which the water circulates; the salts with
which it is charged become precipitated into a chamber with which the turns or
bends of the coil are connected by means of short tubes. The salts are afterwards.
discharged by the boiler pressure.
Dated this 17th day of July 1890.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Purifying Boiler Feed Water.
We, CHARLES DE KERPEZDRON and ALBERIC GIBAULT both of 1 Boulevard
St. Denis, Paris, France, Engineers, 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:-
This invention relates to improvements in apparatus for purifying boiler feed
D
0

page_text: Apparatus embodying the said improvements as fitted to a steam boiler is shown
in the accompanying drawings.
Fig. 1 is a longitudinal section thereof.
Fig. 2 is a cross section, and
Fig. 3 is a plan of the same.
The purifier is arranged as shown in the interior of the boiler itself, and is
composed of a series of superposed tubes B suitably connected by elbows and
supported by framing as shewn so as to form a serpentine coil in which the feed
water circulates before being discharged into the boiler.
The lower part of the serpentine coil is in communication with the feed supply
by the pipe G which is provided with the feed cock R and a blow off cock R¹
allowing, when it is desired to clean the purifier, of the discharge of the mud or
sludge deposited from the water. At its upper part, the coil ends in a bent or
sickle shaped tube FI closed by a balanced flap or valve T through which the feed
water is discharged upon the inclined channel P where it comes into direct contact
with the steam and then passes into the water space of the boiler from the enlarge-
ment M at the lowest part of the inclined channel P where is also situated a
trough A, closed by a trap with counterweight T', and designed to receive the
liquid mud which is deposited upon the channel P.
The pipes B are provided internally with a semi-cylindrical lining F (Fig. 1)
capable of being readily removed, and furnished with a series of semi-circular blades
or vanes E of sheet metal slightly inclined from their upper to their lower portions
in a direction opposite to that of the water in the pipes, said blades being designed
to retain the lighter impurities suspended in the feed water.
The inclined channel P is also furnished with baffle plates D of sheet metal
which alternately project from opposite sides of the channel as shown in Fig. 3 and
break the course of the water so as to compel the same to travel to and fro across
the channel P before reaching the discharge M.
The operation of the apparatus is as follows:
The feed water forced through the pipe G is, from the moment of its entrance
into the purifier, subjected to the high temperature of the boiler which causes the
greater portion of the salts in the said water to deposit in the purifier.
The water circulating in the pipes B is in great part freed from the insoluble
foreign substances held in suspension therein, by the blades or vanes E at the same
time as the salts are deposited under the influence of the high temperature of the
boiler.
On arriving at the upper part of the apparatus, the water which is then almost
completely freed from the impurities it contained, is discharged through the bent
tube H upon the inclined channel P where it flows in a thin stream and where being
directly in contact with the steam, and by reason of the temperature to which it is
subjected, it is partially vaporized, and completes its purification by depositing upon
the channel P the small amount of impurities it may still contain, flowing thence
freely into the boiler.
In order to discharge the calcareous and other matters which have been separated
in the apparatus, the admission cock R is closed, and the blow-off cock R'is opened.
The valve T under the two-fold influence of the counterweight and of the pressure
of the steam in the interior of the boiler closes, whilst the same pressure compels
the trap T to open so as to give passage to the steam the pressure of which.drives
the calcareous substances and the mud etc. which were deposited, through the coil
and the pipe G, the impurities being discharged through the said cock R.
When it is desired to effect a more complete cleansing of the purifier, the
operation may be greatly facilitated by removing the internal linings F which are
arranged so as. to. slide readily in the tubes B, when the connecting elbows are
removed.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. In an apparatus for purifying boiler feed water a coil B provided with blades
or vanes E and D substantially as and for the purposes set forth.
2. The hereinbefore described feed water purifier comprising the coil B, linings F
having baffle plates E, an inclined channel P having baffle plates D, and the
valves T, T, substantially as set forth.
3. The hereinbefore described improvements in apparatus for purifying boiler
feed water constructed and operating as and for the purposes set forth.
Dated this 16th day of April 1891.
CHARLES DE KERPEZDRON,
By L. W., per F. B.
A. GIBAULT,
By L. W., per F. B.
CHARLES DE KERPEZDRON,
By L. W., per F. B.
A. GIBAULT,
By L. W., per F. B.