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Nov. 13, 1962
G. ROSS]
STEAM GENERATING ELEMENT FOR UNIDIRECTIONAL
WATER CIRCULATION
Filed Jan. 25, 1955
3,063,430
INVEN 1 OR
GIOVANNI ROSS/
Unite
3,063,430
ttes
l?atented Nov. 13, 1962
1
3 063,430
STEAM GENERATING ELEMENT FOR UNI
DIRECTIONAL WATER CIRCULATION
Giovanni Rossi, Via Gonzaga 7, Milan, Italy
Filed Jan. 25, 1955, Ser. No. 483,915
Claims priority, application Italy .i'an. 26, 1954
1 Claim. (Cl. 122-406)
The present invention relates to steam generators.
It is known that improper water circulation in steam
boilers may be so serious as to cause the breaking of
associated tubes and collectors.
Proposed solutions to this problem include downcom
ers, improving the circulating pumps, and arranging the
downcomers in the associated combustion chamber.
The problem of proper circulation is particularly im
portant in high pressure boilers, especially with respect
to the type of boiler wherein the volume of ‘water is
reduced to a minimum.
It is accordingly an object of the present invention to
provide effective water circulation by improved and ef?
cient techniques.
According to the invention, there is contemplated an
arrangement adapted to create a thermal dissymmetry to
obtain a di?erential heating of water contained in two
portions of a conduit such that a natural unidirectional
circulation results through the conduit.
2
heat in the combustion chamber under better conditions
than the rest of the conduit and to the feeding of the
left hand branch with cold water from the bottom of
the collector B. A unidirectional water circulation is
therefore created in the conduit according to the arrows
X and Y. This result is further improved by arranging
a water feed pipe 2 and steam take-o?c conduit 3 as illus
trated.
Moreover, the geometric dissymmetry of con
duit portion 16 still further insures a unidirectional ?ow.
In FIGS. 2 and 3, parts corresponding to those of FIG.
1 are given the same reference provided with single and
double primes respectively.
In these embodiments, a
screen 5 of retractory bricks is positioned such that the
right hand branch of each circuit heats up quicker, thus
stimulating circulation in the direction of the arrows X’
and X”. In order to render the thermal dissymmetry
even more effective, the heat sources C’ and C", as
illustrated, can be displaced relative to the center of the
associated chambers towards the right hand branches.
There will now be obvious to those skilled in the art
many variations of the structures set forth above. These
variations will not, however, depart from the scope of
the invention if de?ned by the following claim.
What is claimed is:
A steam generator element comprising a heat source,
a collector-separator, a ring shaped system connected at
both ends to and forming a continuous ?uid system with
The invention will next be described in greater detail
with reference to the annexed drawing wherein some
said collector-separator, said ring shaped system de?ning
preferred embodiments are given by way of nonlirnita
tive examples of the range of the invention.
In the drawings:
FIG. 1 illustrates diagrammatically and in side view
conduit portions connected to said collector-separator,
said ?rst portion depending downwardly from said col
lector-separator, and means positioned between said ?rst
a combustion chamber and comprising ?rst and second
and second conduit portions to prevent the ?uid system
of a ?rst embodiment of the invention;
from being uniformly heated by the heat source in the
FIG. ‘2 is a similar view of a second embodiment of 35 combustion chamber whereby to cause a thermal dis
the invention;
symmetry and a resultant unidirectional ?ow of ?uid in
FIG. 3 is a similar view of a third embodiment of the
the system, said means including a conduit portion cou
invention; and
pling said ?rst and second portions so that with said
FIG. 4 is a perspective view of a steam generator
collector-separator a closed ring is formed, the conduit
realized with elements according to FIG. 1.
40 portions being of substantially equal diameter, said heat
The boiler element of FIG. 1 includes an annular or
source being positioned within the ring symmetrically
ring-shaped system or conduit A disposed in a vertical
with respect to the ?rst and second portions, said conduit
plane and to which is connected a separator-collector B
portions being part of a single tube.
constituted by a simple horizontal cylindrical container.
A heat source C is arranged in the center of the annular 45
References Cited in the ?le of this patent
conduit which de?nes by its inner surface the combustion
chamber for the boiler. The ring assembly can be con
sidered generally as consisting of ?rst and second con
duits which lead into and out of the member B .and
which are coupled by an intermediate member which 50
gives the system a thermal asymmetry, the overall con
duit being of substantially constant diameter.
The separator-collector B is disposed at the left of
the central vertical axis of the chamber de?ned by the
conduit.
UNITED STATES PATENTS
360,053
695,956
1,919,521
1,976,462
2,182,782
2,240,100
up more rapidly than that contained in the left hand
branch, this being due to the presence of the upper h0ri~
zontal section 14 of the conduit which is a?ected by the
1887
1902
1933
1934
1939
1941
FOREIGN PATENTS
The left portion or branch 10 of the conduit
A depends vertically downward from the bottom of the
collector B, While the right hand branch 12 leads to a
higher position in said collector. This arrangement in
sures a thermal dissymmetry in the assembly whereby
the water contained in the right hand branch will heat
Sawyer _____________ __ Mar. 29,
Solomiac ____________ __ Mar. 25,
Lasker ______________ __ July 25,
Roe _________________ __ Oct. 9,
Barnes ______________ __ Dec. 12,
Schmidt _____________ __ Apr. 29,
266,024
Germany ____________ __ July 11, 1911
388,859
448,657
378,722
717,063
898,865
59,908
832,293
Germany ____________ __ Jan. 21,
Great Britain ________ _._ June 12,
Italy ________________ __ Feb. 22,
Germany ____________ __ Jan. 15,
France _______________ _._ May 9,
Netherlands _________ __ Aug. 16,
Germany ____________ __ Feb. 21,
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