IMPROVEMENTS IN STEAM BOILERS
Year: 1882

page_text: LETTERS PATENT to Samuel Pearce Wilding, of the firm of Fell and Wilding,
16
"2
of 23 Rood Lane, in the City of London, Patent Agents for an Invention of
IMPROVEMENTS IN STEAM BOILERS Communicated to him from abroad by
Stollwerck Brothors, of Cologne, in the Empire of Germany, Manufacturers
PROVISIONAL SPECIFICATION left by the said Samuel Pearce Wilding at
the Office of the Commissioners of Patents on the 30th October 1882.
SAMUEL PEARCE WILDING of the firm of Fell and Wilding of 23 Rood Lane
in the City of London, Patent Agents,
"IMPROVEMENTS IN STEAM BOILERS."
A Communication to me from abroad by Stollwerck Brothers, of Cologne, in the
Empire of Germany, Manufacturers.
The said invention relates to steam generators or boilers, and is designed to
prevent incrustation on those parts of steam-boilers which are in contact with the
fire and not easily accessible, and further to effect the better utilisation of the gasos
of combustion.
The apparatus consists of a system of feed heating tubes formed conveniently
of two parallel tubes leading into a transverse one and all placed in the furnaco
flues, to be heated by the waste gases of combustion, after they have passed from
the evaporating surfaces.
The feed water enters by one of the parallel tubes, passes through the transverse
tube, back through the other parallel one, and then rises to an upper separating
chamber or chambers, preferably subjected to the heat of the gases of combustion
before they leave the boiler.
This chamber consists of one, two, or more cylindrical shells preferably inclined
obliquely, and placed side by side, into one of which the feed water enters at one
end, through a bent pipe directed towards the opposite end of the chambers. Tho
steam, generated from the boiler below, is also introduced into the same chamber,
by a bent pipe, whose orifice directs the steam to meet the incoming flow of feed
water

page_text: The interior of the chamber, where the feed water and steam meet, is partially
filled with sieves and plates, to facilitate the separation of solid particles from the
feed water and to further their settlement.
After passing through one separating chamber, the feed water may be directed
into a second or third chamber, again meeting a flow of steam, from the boiler as
before, and passing over and through plates and sieves.
The feed water is thus first caused to deposit any sludge in the lower foed
heater, and afterwards doubly purified by meeting the flow of steam in the
separators above.
After this purification and heating the feed water is fed into the boiler in the
usual way.
An additional steam-chiest may be conveniently added above the two separators,
the steam therefrom being received into it and separated by a baffle plate from
any surcharge of water.
This system of feed heating and purification is applicable to any boiler, but is
more particularly advantageous when combined with a multitubular water tube
boiler of the form known as the "Root" boiler.

page_text: B
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Samuel Pearce Wilding in the Great Seal Patent Office on the
4th April 1883.
SAMUEL PEARCE WILDING of the firm of Fell and Wilding of 23 Rood Lane,
in the City of London, Patent Agents, "IMPROVEMENTS IN STEAM BOILERS.'
A Communication to me from abroad by Stollwerck Brothers, of Cologne, in the
Empire of Germany, Manufacturers
The said invention relates to steam boilers combined with depositing chambers,
through which the feed water passes, previous to its entrance into the boiler
proper.
The object of the said invention is to provide means for preventing the formation
of incrustation in such parts of steam boilers as are generally in contact with the
fire, and, consequently, not easily accessible, and consists in providing means by
which the feed water, before entering the boiler proper, is caused to pass through
one, two, or more smaller depositing chambers, and there to be brought into
contact with a jet of steam, and a series of sieve-like or perforated plates, by
which said feed water is freed from its incrustation, before leaving the depositing
chambers.
To enable others skilled in the art, to better understand the nature of the said
invention, I now proceed to describe the same when applied to a tubular boiler,
through tho heating pipes of which, a constant circulation of water is maintained,
the annexed drawings illustrating such boiler in combination with the improved.
apparatus, by which the feed water is freed from its incrustation, before entering
the tubes of the said tubular boiler.
.
In the accompanying drawings, forming part of this specification :-
Figure 1 is a longitudinal vertical section through boiler K containing the
improvement.
Figure 2 is a front view of those parts of the boiler embodying the improvement.
Figure 3 is a plan view of the same in section.
. Figures 4 and 5 are transverse vertical sections of tho depositing chambers K' K,
respectively.
Reference being had to the accompanying drawings K K' represent two
cylindrical depositing chambers mounted in an inclined position above the main
boiler, and communicating therewith, by means of the short pipes b b and the
receiving chamber a. The chamber K¹ also communicates with the boiler proper,
by means of the feed-water discharge pipe e, while tho feed-water inlet consists
of the pipe c entering chamber K. The chambers K K' are in connection with
each other, through the pipe d, and are mounted with a steam reservoir com-
municating with the same, by means of the short pipes ff. The chambers K K¹
are provided, inside, with a number of sieve-like or perforated plates, preferably
made of corrugated sheet metal, and intended for receiving and collecting the
deposits of incrustation from the feed-water, and arranged either in horizontal
layers, as at g in Figure 3, or set in a vertical position and extending across the
inside of the chamber, as at h in the same figure.
Having thus described the apparatus for freeing feed-water from its incrustation
before entering the main boiler, I now proceed to describe its operation.
The steam generated in the boiler proper carrying some of the water in the
said boiler with it, passes into the receiving chamber a, and thence through the
short pipes b. b. into the depositing chambers K K'. The feed-water, preferably
ip a heated condition, enters the boiler K through the feed-water pipe .c, here

page_text: meeting the steam bubbles from the short pipe b either in a rectangular or opposite
direction and yielding to the circulating current of water and steam, is carried
along by the latter, and driven through the sieve-like or perforated plates gin the
chamber K, depositing thereon and on the inner sides of the said chamber K the
greater part of its incrustation. Subsequently passing through the bent piped it!
enters the chamber K³, again meeting a jet of steam entering through the short
pipe b. in a direction rectangular or opposite to the said stream of feed-water, and
with the same result as in the other chamber, the incrustation still remaining in
the feed-water being deposited, as described with reference to chamber K, during
its passage through the siove-like or perforated plates h arranged in this
chamber K²,
The feed-water, now having been thoroughly freed from its incrustation, escapes
from the chamber K³, through the pipe e, and enters the main boiler, there to be
evaporated and transformed into steam.
The steam admitted into the depositing chambers K K' through the pipes b‍b, 1
after having been utilized as described for freeing the feed water from its
incrustation, passes through the short pipes ff and is collected in the steam
reservoir mounted above the two depositing chambers K K'. Here coming in
contact with one or more plates of sheet metal, it is freed from its water by con-
densation, and can be taken from the reservoir in a practically dry state, to be used
for any desired purpose.
In cleaning the chambers K K' from the incrustation, deposited therein in a soft
state, it is only necessary to take out the sieve-like or perforated plates, when they
and the inner sides of the said chambers may be readily scraped and the incrustation
removed therefrom, after which the plates may be reinserted in the chambers.
Though the use of two such chambers K K¹ may be found sufficient in most
instances, I wish it distinctly understood that I do not confine myself to this
number, but that an additional number may be added without deviating from the
nature of the said invention.
The advantages derived from the apparatus as above described are self evident,
and, in a general way, may be summed up as follows, that is to say:
First. Å feed of water is obtained which is practically free from any particles
producing incrustation, whereby the burning of the fire plates and pipes is provented,
and the quality of the heating surface is greatly improved.
Second. A thorough utilization of the heating surfaces is obtained, the pipes
being free from incrustation, and therefore better absorbing the fire gases.
Third. The incrustation is collected at points easy of access and not in contact
with the heating gases.
Having thus described the invention communicated to me, be it known that
what I claim as new and desire to secure by letters patent is:
First. In a feed water purifier for steam boilers, the combination of a cylindrical
chamber having perforated plates or diaphragms, a water inlet pipe located at
one end of said plates or diaphragms, a water outlet pipe arranged at the other
end thereof, and a steam inlet pipe arranged at the end of the chamber near
the water inlet pipe, all being so constructed that the feed water entering
through the said water inlet pipe is carried along by the mixture of steam and hot
water issuing from the steam inlet pipe and forced through the said perforated
plates or diaphragms, thereby depositing on the latter and the inner sides of the
said cylindrical chamber practically all its incrustation before entering the steam
boiler proper, substantially as and for the purpose specified.
Second. In an apparatus for freeing feed water from incrustation, the combination
with two or more depositing chambers (K K¹) entered by the hot water and
steam ejecting pipes (6 b) and opposite to the latter by the feed water inlet (c)
and circulation pipe (d) respectively, and having a series of sieve-like or perforated
plates arranged as described, of a steam boiler, the feed water to be freed from its
incrustation being so conducted or circulated through the said chambers K K¹ as
to be repeatedly met by the steam beforo passing through all the series of

page_text: perforated plates and entering the steam boiler proper, substantially as and for the
purpose set forth.
Third. The method of freeing feed water from its incrustation by allowing the
said feed water to enter a depositing chamber K having perforated plates or
diaphragms and a steam inlet pipe (b) so arranged that the feed water, by means
of the steam and hot water ejected from the said steam inlet pipe, is forced through
the said perforated plates or diaphragms and through another or several similarly
constructed depositing chambers (K¹) connected together by means of a circulation
pipe (d), so as to be repeatedly met by the steam and passed through the perforated
plates or diaphragms in the several chambers, thereby depositing on the said plates
and the inner sides of the said boilers practically all its incrustation before entering
the steam boiler proper, substantially as and for the purpose specified.
Fourth. The combination of the steam receiver D, constructed as described,
with a subjacent cylindrical chamber having perforated diaphragms or plates,
water inlet and outlet openings, and steam inlet and discharge pipes, substantially
as and for the purpose set forth
In witness whereof I, the said Samuel Pearco Wilding have hereunto set my
hand and seal this thirty-first day of March in the year of our Lord
One thousand eight hundred and eighty-three.
Witness:
RICHARD A, HOFFMANN
23 Rood Lane
Fenchurch Street
London E.C.
SAM. P. WILDING. (L.S.)