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Патент USA US2105801

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Jan. 18, 1938.
Filed May‘4, 1956
2 Sheets-Sheet 1
Jan. 18, 1938.
_Filed Méy 4, 1956
2 Sheets-Sheet 2
Patented Jan. 18, 1938
Albert Edward Watts, Montreal, Quebec, Canada
Application May 4, 1936, Serial No. 77,741
4 Claims. (Cl. 122-149)
The invention relates to boilers as described portion l5 through the plate ii to the plate H3.
in the present speci?cation and illustrated in the
accompanying drawings that form part of the
The invention consists essentially in directing
the course of the water within the boiler to insure
a ?ushing current and ?ash action and to in~
crease the extent of the heating surface as point
ed out in the claims for novelty following a de
10 scription in detail of the structural features par
ticularly useful in the generation of steam,
though with some modi?cation it may be applied
to the heating of water for radiation purposes.
The objects of the invention are to hasten the
15 generation of steam in comparatively large in
stallations, in fact to practically make this in
vention a ?ash boiler type; to automatically and
continuously flush the boiler and keep it clear
of scale and incrustations and maintain its good
steaming properties; to improve circulation of
the water and so arrange the ?re as to present
a heating surface practically everywhere to the
water, and generally for heating purposes, ma
rine and stationary equipment conserve the fuel
and increase efficiency.
Referring to the drawings, Figure l is a longi
tudinal vertical section of the boiler.
Figure 2 is a vertical cross sectional View on
the line 2-2 of Figure 1, showing the preheated
water feed to the circulatory inducing passages.
Figure 3 is a vertical cross sectional view on
the line 3-3 of Figure l and showing the wall
of the preheating chamber broken away.
Figure 4 is a detail of the domestic hot water
connections to the boiler tube.
Figure 5 is a perspective View of the boiler
showing the rear end partly cut away to expose
the combustion passages and preheater.
Figure 6 is a prospective view of the boiler
from the front end and showing an oil burner
mounted at the mouth of the combustion cham
ber and partly broken away to show the combus
tion passages.
Like numerals of references indicate corre
45 sponding parts in the various ?gures.
The boiler casing is made up of the main tubu
lar portion l5 extending the full length with the
intermediate dome section 16. This dome sec
tion forms the water and steam chamber and
has the end plates I‘! and I8 let into and form
ing divisions in the tubular portion l5. A plate
l9 forms the top and side walls sealing the water
and steam chamber.
The main combustion chamber 20 extends from
55 the front plate 2| closing the end of the tubular
The lower portion 22 extends beyond the plate
it and has its horizontal edges bent outwardly
at 23 to form a horizontal division cutting off
and diverting the products of combustion as will
be described hereinafter.
A water preheater in the form of a hollow cast
ing 21‘: forms the end wall of the main com
bustion chamber 2%}, while the rear end of the
tubular portion 55 is closed by the plate 25.
Fire tubes 2% are mounted in the walls I’! and
i8 and form passages from the rear of the com
bustion chamber 20 above the divisions 23 to the
front chamber 2? and from this chamber to the
rear chamber 28 below the divisions 23, the ou+~ 15
let 2!: leads to the smoke stack.
The water and steam chamber it is provided
with ba?ies 3E! and 3! spaced between the tubes
and, the wall l9 and extend the full length of
the chamber. These baffles follow the contour of
the wall and converge inwardly to near the bot
tom center while at their upper end they sweep
inwardly to form open mouthed passages 32
and 33.
The water preheater Ed has a water inlet pipe 25
34 connected at its lower end, leading from a
connecter 35 which is one of a series connecting
the water chamber it with the sludge chamber
36, while the outlet 3? divides into two pipes 31
and 38 leading into the water chamber it at
the water lever. The ends of these pipes are
directed into the circulatory passages 32 and 33.
The combustion chamber 28 has three ex
pansions formed of ?ve brick rings 39 and ‘it
and has the burner opening ‘it with which the
oil burner unit ii?! is connected as illustrated in
Figure 6.
A sight tube 133 open at both ends is set into
the rear end wall 25 and through the preheater
casting 24, and is suitably closed at the outer
end by a glass lie, or other transparent and heat
resistant material. This tube 43 is provided with
an opening t5 to provide a. short circuit of the
products of combustion direct‘ to the chamber
28 and the smoke stack.
Domestic hot water is provided by utilizing two
or more of the tubes 26 and for this purpose the
back of the plates H and it have the bosses 46
welded thereon about the tubes into which the
studs 4? "are screwed, these studs hold the tapered
plugs 188 and plates 59. The tapered plugs 48
effectively seal the ends of the tubes, while the
glands is seal the ?ttings 50. The ?ttings 55
are connected together at one end to form a
return connection and at the other end connect 55
with the pipes 51 and 52 forming the feed and
return of the domestic hot water system.
A ?ller tube 53 having its ends ?attened and.
sealed is centrally placed and set in the tubes 26
used for the hot Water system and are held in
position by the pins 54.
A main steam outlet 55 is provided on the top
of the dome together with outlets for various
other purposes such as pressure gauges and water
10 gauges.
In the operation of this boiler, the products of
combustion are continuously in contact and pro
viding heating surfaces against the body of water,
and it is the ?rst contact of the products of com
they again contact the preheater and its inlet
and outlet pipes, this instant and constant heat
ing of the small body of water in the preheater
which is at once delivered to the boiler, gives to
the ‘boiler the character of a ?ash type where
steam is generated almost instantly and the
water is agitated and circulated giving exceed
ingly high e?iciency in the generation of steam.
The baf?e plates are adaptable to almost any
type of boiler and are specially effective in cir 10
culating the’ water in the Scotch type boiler where
a relatively large body of water has to be agi
tated and circulated.
In hot water boilers, the preheater can be used
15 bustion against the face of the preheater casting,
for many other purposes, such as delivering hot
which contains a comparatively small body of
water, that causes rapid heating of this body,
causing the hot water to circulate through the
pipes 31 and 38, at the same time drawing cold
20 water from the bottom of the boiler through the
pipe 343. The discharge pipes 3'1 and 38 discharge
the heated water behind the ba?les 38 and 3!,
and this water being under circulatory pressure,
is forced down in the passages 32 and 33 expel
25 ling the colder water out at the lower end of
the ba?ie allowing the heated water to follow
into the main body of water, and its natural
water or steam‘to humidi?ers or the like.
What I claim is ;--~
1. In a boiler, a ?re chamber terminating in a
water wall, a water chamber about said ?re
chamber, baffles spaced from the walls of said
Water chamber and forming open ended circu
latory passages, a water connection from the bot
tom of the water chamber to said water wall and.
discharge pipes from said water Wall to said water
chamber and directing a ?ow of preheated Water
into said passages.
tendency to ascend causes an internal circulation
2. In a boiler, a ?re chamber terminating in a
water wall, a water chamber about said ?re
in each side of the boiler around the ba?les, which
30 at the same time is constantly forced by the
chamber, ba?les spaced from the walls of said
water chamber. and forming open ended. circula
feeding of freshly heated water from the pre
There are therefore three circulations
in the boiler, the main circulation from the ‘bot
tom of the boiler through the preheater to. the
35 tops of the passages 32 and 33, and the two circu
lations around the bail‘les, causing a rapid turbu
lence particularly noticeable at the water level
breaking up and dispersing oxygen bubbles there
by preventing them from adhering to the metal
40 surfaces and thereby preventing the gradual eat
ing away of the metal at the water level which
in the past has been the cause of serious damage
and the reduction of the life of the boiler. ‘ This
continual turbulence and positive circulation of
45 the water also carries all vegetable matter in the
water down behind the ba?les and e?ectively pre
vents it gathering into lumps, it is in fact in time
forced down into the sludge chamber through
the connectors 35and the same thing happens
with any scale formed. The water in the sludge
chamber is entirely outside the effect of the circu
lations and relatively cool and for this reason the
sludge is kept in a soft state and easily removable.
All heating surfaces are therefore kept free of
55 deposits with subsequent freedom fromiburned
out spots.
The products of combustion after contacting
the pre-heater are diverted back through the
?re tubes above the plates 23 to the front chamber
60 2? and thence through the lower tubes to the
chamber 28 and thence through the outlet 29 to
the smoke stack. During all this travel the prod,
tory passages, a sludge chamber below said water
chamber and directly connected therewith, a
water connection from the bottom of the water
chamber to said wall and discharge pipes from
said water wall to said water chamber and di
recting a ?ow of preheated water into said pas
3. In a boiler, a ?re chamber having a burner
opening and stepped ?re brick linings leading to
a main tubular section terminating in a water 40
wall preheater, a water chamber about said ?re
chamber, ba?les spaced from the walls of said
water chamber and forming open ended circula
tory passages, a water connection from the bot
tom of the water chamber to said water wall, and
discharge pipes from said water wall to said
water chamber and directing a flow of preheated
water into said passages
4. In a boiler, a ?re chamber terminating in a
water wall ba?le forming a preheater, an upper >
chamber, a front compartment at the end of the
fire chamber and a rear compartment, passages
connecting the upper chamber with the front
chamber and the front chamber with the rear
chamber, a Water chamber having end. walls
forming the divisions of said front and rear and
upper chambers and side walls terminating in a
steam dome, bail‘les spaced from side walls and
forming open ended passages, discharge pipes
connecting said preheater with the tops of said 60
passages and return connections from the boiler
to- the preheater adapted to start a circulation
ucts of combustion are giving up heat to water ' from the preheater through the boiler.
covered surfaces and at the end of their travel,
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