Year: 1888

page_text: I JAMES EDMUND CARROLL, civil engineer of San Francisco, California, United
States of America, residing at present in Paris, France, 22 Avenue Carnot 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:
The first portion of my invention relates to a particular construction of feed-water
purifiers, and is more particularly intended as an improvement upon the purifying
apparatus described in British letters patent No. 14,646 dated the 12th day of
November 1886.
The apparatus described in the specification of the said letters patent comprises
substantially a tube, the length of which is determined by the length of the steam
boiler for which it is intended.
The tube contains a diaphragm forming a partition by which the tube is divided into
two equal chambers. When passing through these chambers, the feed-water is
subjected to a gradually increasing heat, whereby the salts and other impurities
contained in dissolution in the feed-water are caused to precipitate.
The herein before inentioned apparatus, composed of a tube of a length varying in
each particular case, requires a hole to be bored in the boiler, in order that the
apparatus may be first introduced therein and then secured.
Now, besides the fact that the hole bored in the boiler is a drawback for the
resistance of the latter, few manufacturers will allow their boilers to undergo the
operation. Moreover, this drawback is still more apparent when a boiler of consider-
able power requires to be provided with several such purifiers. Irrespective of the
above, with the said apparatus, there is soine difficulty in making a perfectly tight joint
at the junction of the diaphragm and the inner wall of the tube. Finally, in some
cases, the installation of the boiler is sometimes such that there is not sufficient room
in front of the boiler to permit the free introduction of a long tube.
To remove the herein before mentioned inconveniences, I have devised a particular
construction of purifier; the characteristic feature of the purifier resides in this that
it is composed of a number of sections which are bolted to each other; each. section

page_text: may be introduced separately into the boiler by the man hole without necessitating a
special hole to be bored for the introduction of the section or for the fitting thereof to
the boiler.
The improved construction of purifier is shown, in perspective in fig. 1 sheet 1 ;
Fig. 2 is a cross section of fig. 1 and fig. 3 shows the purifier fitted inside a steam
boiler.
Each section 1. assumes a box-like shape, open at both ends and provided with
flanges 2. by which the sections 1. can be bolted to each other, by means of bolts or
rivets. Each section 1 contains a portion of the diaphragm. 3 cast therewith.
Before fitting the sections together, their ends, as well as the ends of the diaphragm 3,
are suitably faced or planed for obtaining a perfectly tight joint between the sections
and between the portions of the diaphragm.
The front section, at the left, is provided with or connected to the feed-pipe-4, which
passes through the boiler plate, a tight joint being readily obtained by any known
means. The feed-water delivered by the-feed-pipe 4 circulates, in the direction of the
arrows in fig. 1, towards and into the lower chamber of the purifier; after the water
has reached the end of the chamber, it rises through the space left between the end
of the apparatus and the end of the diaphragm 3, as well also as through the holes 5,
up into the upper chamber and finally issues from the latter through the boles 6, into
the boiler. The water entering the boiler is thus entirely deprived of the salts which
it contained in dissolution, the-salts being precipitated both onto the compound
diaphragm 3, and the bottom of the lower chamber of the purifier.
The apparatus may be fitted or held within the boiler by any suitable means; in the
drawing, I have shown several arms 7, 7.
·
The sections 1, should preferably be made of cast metal, although they might be.
made of wrought iron or other metal, brazed or soldered. The sections, although
shown as of a flattened form, might also be of round, oval, prismatical or other section.
The flat form is however preferred.
When it is desired to blow off, this operation is carried out as with the apparatus
referred to in the specification of the above named letters patent. The action is
reversed, that is to say the feed is stopped and the blow off cock is opened, the
impurities, are then blown out of the purifier by the pipe 4, into which the blow off
pipe branches.
The second portion of my invention consists in combining, either with the herein-
before described construction of purifier, or with the purifier described in the
specification of the letters patent aforementioned, or with any other system of purifier
based on a similar principle, such for instance as the one described in British letters
patent No. 11802 dated August 30 1884, a supplementary device for simultaneously
removing the sediments which may collect at the bottom of a steam boiler, whenever
the blowing off operation is effected by means of the purifier.
The diagram fig. 4, sheet 2 shows the outline of a steam boiler containing a purifier
provided with the said supplementary device..
a: is the purifier composed of sections as hereinbefore described with reference
to fig. 1, 2, and 3, sheet 1 or composed in any other known manner. b, is the
feed-pipe.
The supplementary device is composed of a pipe e leading from the end of the
purifier and bent so as to lay flush with the bottom of the boiler. d is a check or
non-return valve, the purpose of which will be indicated below.
The operation is as follows: when feeding, the feed-water circulates in the lower
chamber of the purifier a and rises into the upper chamber, and then runs out into the
boiler by the outlets e. When, on the contrary, the precipitated salts require to be
blown off, the valve placed in a branch pipe of the feed-pipeb. is opened; the sediments
which have been disposited at the bottom of the boiler enter the perforated pipe c, out
of the same, past the non-return valve & which is thereby opened, and into the purifier,
whence they are blown off, together with the precipitated salts, into the branch or
outlet pipe connected to the feed-pipe b..
The third portion of my invention relates to the outlet of the purifier.. The

page_text: improvement consists in providing the holes through which the feed water issues
from the purifier into the boiler, with small upright pipes e. The object of these pipes,
is to prevent the scum which may form in the upper chamber of the purifier, from
leaving the latter and reaching the inside of the boiler. By means of these pipes e,
the scum is collected therein and may be removed at the next blowing off operation.
The length and size of the said pipes may vary.
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:
1. A feed water purifier of the kind described, composed of several sections 1, each
section being provided with a portion of the diaphragm 3 and all sections being
secured together, substantially as described and shown in fig. 1, 2, and 3, sheet 1, of
the drawings and for the purpose set forth.
2. The combination, with a purifier a of the kind described, of a supplementary
device composed of a perforated pipe e provided with a check valve d, substantially as
described and shown in fig. 4 sheet 2 of the drawings, and for the purpose set
forth.
3. The adaptation, to the purifier a of the kind described, of scum-collecting
pipes e, substantially as described and shown in fig. 4 sheet 2 of the drawings, and for
the purpose set forth.