Improvements in Feed Water Heaters and Purifiers for Steam Generators.
Year: 1897

page_text: Date of Application, 13th July, 1897-Accepted, 4th Sept.,
1897
*COMPLETE SPECIFICATION.
Improvements in Feed Water Heaters and Purifiers for Steam
Generators.
I, BENJAMIN FRANKLIN KELLEY, of 680 Green Avenue, Brooklyn, in the State
of New York, United States of America, Machinist, do hereby declare the nature
of this Invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement, reference being
had to the accompanying drawings and to the letters and figures marked thereon,
that is to say:
This invention relates to an improved construction and arrangement of the
parts of a feed water heater and purifier, and has for a special object to provide
suitable cocks that will permit convenient and thorough emptying of the water
tubes, channels, and chambers of a water tube feed water heater and purifier,
so that there will be no liability to freezing and consequent damage to the heater
when not in operation.
Another object of my invention is to provide a steam jacket surrounding the
settling chamber of a feed water heater and purifier so that the temperature of
the partially heated feed water will be increased after deposit of its impurities
and after it has been already heated by passage through series of water tubes
inclosed in a steam chamber.
Other purposes and advantages of the invention will hereinafter appear in the
construction and combination of feed water heating and purifying devices as
described with reference to the annexed drawings in which:
Figure 1 is a sectional elevation of my improved water tube feed water heater
and purifier, and
Figure 2 is a horizontal section of the same, above the base.
Referring to the drawings, the numeral 1 designates the base portion of the
feed water heater and purifier. The base 1 is provided with a flat top having
perforations 3 therein at suitable points, as shown, for a purpose hereinafter
explained. On the top of the base 1 there is placed horizontally a tube sheet 4
portions of which are elevated to form a series of parallel arranged water channels 5,
6, 7, 8, and 9, as shown.
The water channel 5 communicates at one end with a depending water inlet-
chamber 10 that is located in one side of the base. This chamber 10 is provided
with a feed-water inlet 11 and with a drip outlet 12 having a drainage cock 13
connected therewith.
Below one end of the water channel 6 and communicating therewith, is a
depending water chamber 14 with which a drip outlet 15 and drainage cock 16
are connected.
The bottom of the water channel 7 communicates through a series of the
openings 3, with one end of a settling chamber 17 having a bottom that is pre-
ferably inclined away from beneath said water channel. At its lowest part, the
settling chamber 17 is provided with a blow-off cock 18, located at one side of
the base. Above its deeper part the settling chamber 17 is in communication
through a series of the openings 3, with the water channel 8, for admission of
purified water into said channel,

page_text: The water channel 9 empties through a series of the openings into a water
outlet chamber 21 having an outlet passage 22 for the hot and purified feed water.
There is provided, in the base 1, an annular steam jacket 23 surrounding the
settling chamber 17, water chambers 10, 14, and hot water outlet chamber 21, as
shown. The top of this steam jacket 23 communicates, through an annular series
of ports 24, with a steam space or chamber 25 which is inclosed by a cylindrical
or somewhat dome shaped shell 26 that constitutes the upper part of the feed
water heater. The shell 26 is secured to the tube sheet 4 and top of the base 1
in any suitable or approved manner. A steam inlet 27 is provided, preferably
in one side of the shell 26 and a steam outlet 28, preferably at the top. To permit
the ready removal of oil and water of condensation from the steam jacket 23 and
upper steam space or chamber 25 there is a drip outlet 29 at the lower part of
the steam jacket.
Within the steam space 25 inclosed by the shell 26, there are placed a number
of arched water tubes 31, 32, and 33, arranged in several sets, to connect the
several parallel arranged and horizontal water channels 5, 6, 7, 8, and 9, as shown.
These water tubes are preferably made from seamless drawn brass and have their
ends expanded into suitable apertures in the tops of the several horizontally
arranged water channels of the tube sheet.
By reference to the arrows in Fig. 1, it will be seen that the feed water enters
through the inlet 11 into the chamber 10 and thence passes into one end of the
water channel 5 along which it will flow. When this channel 5 is filled, the water
will rise through all the connected water tubes 31 and pass thence into and along
the water channel 6 and from one end thereof, into the chamber 14; while the
main current will rise through the water tubes 32 and pass thence, through the
water channel 7, and into the settling chamber 17 where the heated water will
deposit its mineral matter and other impurities. From the settling chamber 17
the purified water ascends to the water channel 8 and into the water tubes 33,
where it is further heated by the steam in the surrounding chamber. (These
water tubes 33 conduct the hot feed water into the water channel 9 whence it
passes through the outlet chamber 21 to the boiler, or elsewhere, as required.
In the steam jacketed settling chamber 17 the temperature of the feed water is
increased beyond that received in its passage through the water tubes 31, 32, and
connecting water channels 5, 6, and 7; the impurities are precipitated and thus
the feed water is delivered to the boiler free from scale producing substances.
The water channel 5 delivers water to all the tubes 31 simultaneously. These
tubes 31 discharge into the channel 6 which also communicates directly with the
tubes 32 all of which receive water simultaneously from said channel. From the
tubes 32 the partly heated feed water passes through channel 7 into the settling
chamber 17 where the impurities are precipitated and the water is still further
heated by reason of the steam jacket 23 that surrounds said settling chamber.
Passing now through the channel 8 into all the tubes 33 at once, the water is
still further heated by the steam in the surrounding chamber 25 and then passes,
through the channel 9, into the hot water outlet chamber 21 and thence to the
boiler. In its passage through the steam surrounded water tubes 31 and 32, the
feed water attains a high degree of heat, which is favourable to the precipitation
of mineral substances and other impurities.
The feed water heater may be built in various sizes, determined by the special
purpose for which it may be required, and while the drawings show three sets
of water heating and circulating tubes 31, 32 and 33, I would have it understood
that there may be, instead but two sets, four or more, with but slight differences
in construction of the heater.
The openings 3 are provided in series throughout the length of the horizontal
and parallel water channels 7, 8 and 9, but the channels 5 and 6 each have only
one such bottom opening, located near one end, for communication with the cold
water chambers 10 and 14, respectively.

page_text: The impurities deposited in the steam jacketed settling chamber 17 may be
blown off, through the cock 18, from time to time, as required, leaving only the
purified water to continue its circulation through the tubes 33 of the heater.
Through the drip outlet 29, oil and condensed steam may be discharged from
the steam jacket 23 and communicating steam chamber 25 whenever necessary.
The water chambers 10, 14 and settling chamber 17 being furnished with
drainage cocks 13, 16 and 18, respectively, there is ample provision for drawing
off all the water in the apparatus, whenever desired, and thus there need be no
liability to freezing when the heater is not in use, for by opening the several
cocks the heater can be quickly and thoroughly emptied.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same may be performed, I declare that what
claim is:
1. In a feed water heater and purifier, the combination of the base inclosing the
water chambers 10 and 14, settling chamber 17 and hot water outlet chamber 21;
the tube sheet 4 provided with elevated parallel and horizontally arranged water
channels communicating with the said chambers in the base; the arched water
tubes connecting the said water channels; the steam jacket 23 surrounding said
base and its inclosed chambers; the steam chamber 25; discharge cocks 13 and 16
for the chambers 10 and 14, respectively; and a blow off cock 18 for the settling
chamber 17, said cocks being arranged to permit thorough emptying of the water
tubes, channels and chambers, substantially as described.
2. In a feed water heater and purifier, the combination of the base 1 inclosing
the settling chamber 17 and hot water outlet 21, the said base being provided
with a top having perforations 3, as described; the tube sheet 4 provided with
elevated parallel and horizontally arranged water channels; the arched water
tubes arranged in sets and connecting said water channels; the steam jacket 23
surrounding the base and its inclosed chambers; and the steam chamber 25
surrounding the water tubes and communicating with the said steam jacket of the
base, substantially as described.
3. In a feed water heater and purifier, the combination of a steam jacketed base
inclosing the cold water chambers 10 and 14, settling chamber 17 and hot water
outlet chamber 21; the tube sheet 4 provided with parallel horizontally arranged
water channels 5, 6, 7, 8 and 9 having passages communicating with the inclosed
chambers of the base, as described; the arched water tubes 31, 32, and 33 com-
municating with said water channels; the steam chamber 25 inclosing the said
water tubes and communicating with the steam jacket of the base, through
ports 24; and cocks to drain the several chambers and tubes of the heater, sub-
stantially as described.
4. In a feed water heater and purifier, the combination of the base 1 provided
with steam jacket 23 and inclosing the cold water chambers 10, 14 settling
chamber 17 and hot water outlet chamber 21; the tube sheet 4 provided with the
elevated water channels 5. 6. 7, 8 and 9; the arched water tubes 31, 32, and 33
connecting said water channels; the steam chamber 25 surrounding said water
tubes and communicaung with the steam jacket 23; and drainage or blow off
cocks for emptying the tubes and chambers, substantially as described.
5. My improved feed water heater and purifier, substantially as hereinbefore
described and shown with reference to the annexed drawings.
100x
Jattu
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 5*, Market Street, Nottingham,
Agent for the Applicant.