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Патент USA US3083004

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March 26, 1963
Filed May 3, 1960
United grates Patent @
Patented Mar. 26, 1963
transfer device embodying the principles of the present
invention. It is to be expressly understood, however,
that the drawings are designed for purposes of illustra
Edward F. Kurzinski, Allentown, Pa., assignor, by rnesne
assignments, to Air Products and Chemicals, Inc,
Trexlertown, Pa., a corporation of Delaware
Filed May 3, 1960, Ser. No. 26,448
3 Claims. (Cl. 266—34)
tion and not ‘as a ‘de?nition of the limits of the invention,
reference ‘for the latter purpose being had to the ap
pended claims.
In the drawing, in which similar reference charac
ters denote similar elements throughout the several views:
FIGURE 1 is an elevational view, partly in cross—
This invention relates to improvements in ?uid trans
fer devices and ‘more particularly to devices for intro
10 section, of a fluid transfer device constructed in accord
ducing ?uid into a high temperature reaction zone.
ance with the principles of the present invention;
Fluid transfer devices may be used for introducing
FIGURE 2 is a view in cross-section taken along the
a ?uid, such as oxygen, into the combustion zone of a
lines 2—2. of FIGURE 1; and
metallurgical furnace. For example, in the steel in
FIGURE 3 is an end view of the device of FIGURE 1
dustry, oxygen is introduced into metallurgical furnaces 15 showing the discharge nozzles.
including open hearth furnaces, converters, and electrical
With reference to the drawings, ‘a ?uid transfer de
furnaces to increase steel output without incurring major
vice is shown therein including a hollow inner member
capital investment. Efficient performance is obtained
It) de?ning a passageway 11 located within a hollow
by blowing the oxygen directly onto the molten bath
outer member 12 in overlapping, spaced relation there
and for this purpose a ?uid transfer device, sometimes 20 with to provide an intervening chamber 13. The mem
referred to as a lance, is extended within the furnace with
bers 1t) and 12 may be of circular cross-section and po
its discharge end in close proximity with the surface of
sitioned in concentric relation to provide a chamber 13
the bath. In operation, the transfer device may be sub
of ‘annular cross-section as shown in the drawings. A
ject to temperatures in excess of 4000“ F. and adequate
plurality of elongated hollow members .14 providing pas
cooling of the device is necessary in order to maintain 25 sageways 15 are located in the chamber 13, the elon
the process and obtain an economical life span of the
gated members 14 being spaced from each other and
device. Also, it is advantageous to direct the oxygen
extending longitudinally of the inner and outer members
onto a large area of the bath while utilizing the smallest
10 and 12.. If desired, the members 14 may be of
possible number of devices.
circular cross-section, positioned in equally spaced rela
There are a number of ?uid transfer'devices presently 30 tion in the chamber 13, and in contact with or secured
in use for introducing oxygen into metallurgical furnaces.
to the outer surface of the inner member 10 as shown in
These devices are "generally fabricated ‘from three concen_
the drawing.
trically spaced tubes, the oxygen being passed through
The hollow outer member 12 includes an outer end
the innermost tube and cooling water being directed
inwardly through one of the annular spaces about the 35
center tube and outwardly through the remaining annular
space. One of the disadvantages of the prior devices
is the di?iculty of controlling and interrelating water
volume and velocity as a consequence of the difference
in cross-sectional areas of the spaces provided for in 40
ward and outward ?ow of cooling water. Furthermore, _
the problems presented by prior devices become more
portion 16 and an inner end portion '17 connected in
end-to-end relation, the outer end portion 16 including
spaced ?uid inlet connection 18 and coolant outlet con
nection 19. The outer end portion 16 inwardly of the
outlet connection 19 is adapted to cooperate with struc—
ture not shown for supporting the fluid transfer device
in the wall or roof of the furnace with the inner end
portion 17 extending into the furnace. The inner end
portion 17 may have a wall thickness ‘less than the wall
severe when a plurality of discharge nozzles are used
thickness of the outer end portion 17 and may be con
to increase the area of the bath impinged upon by the
structed of material different ‘from the material of the
outer end portion and may also be made up of a plu
It is therefore an object of the present invention to
rality of sections such as sections .20 and 21. The var
provide a novel ?uid transfer device for operation under
ious sections of the inner end portion may be joined
high temperature conditions.
together and the inner end portion may be joined to
Another object is to provide a ?uid transfer device
outer end portion by any convenient means such as
including a novel cooling arrangement which eliminates 50 by brazing or welding, for example. The unconnected
coolant velocity control problems.
end of the portion 17 which [extends furthermost into
Still another object is to provide a ?uid transfer de
the furnace terminates in a dome-shaped closure 21 which
vice‘ of the foregoing character including a plurality of
may be welded or brazed to the section 21. The inner
discharge nozzles.
hollow member 19 extends throughout the length of the
A still further object of the present invention is to
outer hollow member :11 with one end 22, its innermost
provide a ?uid transfer device of the multiple nozzle
end, terminated in spaced relation with the dome 21
discharge type provided with a novel cooling arrange
and with its other or outermost end 23v spaced beyond
ment for maintaining efficient cooling in regions of the
device subject to high temperatures.
the outer end of the portion 16 and terminated in a
cool-ant inlet connection 24.
The above and other objects of the invention are 60
The elongated hollow members 114 extend throughout
achieved by the provision of a fluid transfer device in
the length of the inner end portion 17 and throughout a
cluding a hollow outer member and a hollow inner mem
portion of the outer end portion 16 terminating in ends
ber located within the outer member in overlapping re
25 located beyond the coolant outlet connection 19. Seal
lationship with the outer surface of the inner member
ing means 26 is located adjacent the ends 25 of the elon
spaced from the inner surface of the outer member to
gated hollow members in sealing contact with the elon
de?ne a chamber extending substantially throughout the
gated hollow members and in sealing contact with the
overlapping region in which a plurality of spaced elon
inner surface of the outer end portion 16‘ and the outer
gated members are located.
surface of the hollow inner member 10, and sealing
The foregoing will be more fully understood from the‘
means 27 is located between the inner surface of the
following detailed description considered in connection
portion 16 and the outer surface of the member 10 on
‘with the accompanying drawing which discloses a ?uid
the other side of the ?uid inlet connection 18 to form a
chamber 28 in communication with the ?uid inlet 18
and the ends 25 of the elongated hollow members 14.
The other ends of the elongated hollow members 14 are
each joined to a nozzle structure 29 angularly disposed
with respect to the longitudinal axis of thevhollow inner
12 makes it possible to easily provide any desired rela
tionship between the cross-sectional area of the passage
ways for the incoming coolant and the outgoing coolant
member 10.
without consideration of the total cross-sectional area
of the oxygen supplying passageway. It will be appre
ciated this feature of the invention makes it possible to
design the oxygen ?ow passageway, that is, the passage
ways 15 of the elongated hollow members 14, by only
The nozzle structures 29 pass through suit- .
able openings formed in the domed end closure 21 and
are joined thereto in a?uid-tight connection such as by
considering oxygen flow requirements, and to design the
soldering or brazing. it will be noted that the termi
nating end 22 of the inner hollow member 1% is located in 10 passageway 111 of the hollow inner member 16 by con
sidering only coolant inlet ?ow requirements. The re
a transverse plane passing through the nozzle structures
quired cross-sectional area of the coolant outlet passage
29 and the passageway 11 of the ‘hollow inner member 11}
19 is established by selecting the proper internal diameter
is in ?uid communication with the passageway 15 but
of the member 12 when considering the area of the in
not in ?uid communication with the passageways pro
15 ner member ltland the total area of the elongated hollow
vided by the elongated hollow members 14.
members 14. Thus, in accordance with the present in
In order to compensate for temperature differences be
vention, desired relative cross-sectional areas of the cool
ant inlet passageway and the coolant outlet passageway,
such as equal or proportional relationships, may be read
tween elements of the device, the elongated hollow mem
bers 14 are provided with offset portions 30 intermediate
their ends to permit different expansions of the elon
gated hollow members 14 and the hollow outer ‘member 20 ily obtained.
In addition to the feature of establishing inlet coolant
12. The offset portions 30‘ are preferably located with
?ow and the outlet coolant flow relationships as described
in the outer end portion 16 adjacent its end to which the
above, the feature provided by the present invention of
inner end portion 17 is joined. The offset portions are
terminating the discharge end 22 of the hollow inner
formed by displacing one portion of each of the elongated
member 10 in. adjacent relationship with the portion of
hollow members from another portion of respective hol
the domed end 21 within the nozzle structures 29 and
low members by an angle equal to the angular spacing
of locating the nozzle structures in the path of the cool
between the elongated hollow members. The portions
ant ?uid from‘the discharge end 22 to the return pas
of the elongated hollow members outwardly of the off
sageway '13 improves the cooling of the device in the
set connections 30 are preferably spaced from the outer
surface of the hollow inner member 10 and the inner 30 region subject to high temperatures and overcomes cool
ing problems ordinarily present in multi~nozzle ?uid
surface of the overlying portion 16 to facilitate provid
ing the seal 26 between these surfaces at the ends 25 ‘ transfer devices.
Fluid transfer devices used in high temperature reac
of the elongated hollow members. This feature not
tion zones are subject to damage due to the high tempera
only simpli?es construction of the device but also makes
' it possible to easily replace the elongated hollow mem
tures involved, the temperature of the available coolant,
bers and the portion of the device including the nozzles
the quantity of coolant available, or for other reasons.
29 as may be required.
. It therefore becomes necessary to repair or replace com
In operation, the device is supported in a metallurgical
furnace such as an open hearth furnace for refining steel
by suitable supporting structure cooperating with the 40
outer end portion 16 of the hollow outer member ‘.12
ponents of they device particularly components subjected
to high temperatures. The ?uidjtransfer device provided
by‘ they present invention is adapted for disassembly and
replacement of component parts. In particular, should
any portion of the discharge end of the device become
preferably inwardly of the coolant outlet connection :19
damaged due to excessive temperatures, the inner end
and outwardly of‘ the connection between the portions
portion 17 of the hollow outer member 12, the hollow
16 and 17., The supporting structure would preferably
be designed to provide inward and outward movement 45 inner member 10 and the elongated hollow members 14
may be removed as a unitary structure by breaking the
seal between the inner and outer end'portions of the hollow
outer member, the seal 27 between the hollow inner mem
water is connected to the coolant inlet connection 24
ber 10 and the end portion 16, and the seal 26 in the
and ‘a coolant discharge conduit is connected to the cool;
of ‘the ends 25 of the elongated hollow members
ant outlet connection ‘19. _Also, a source of ?uidsuch 50
14. These components of the device may be easily re
as oxygen is connected to the ?uid inlet connection 18. V
placed and the damaged components may be repaired for
The oxygen flows into the chamber 28 .and from this
future use.
chamber through passageways 15. of the elongated hollow
There is thus provided by the present invention a novel
members 14 and discharges into the furnace through the
?uid transfer device adapted for introducing a ?uid into
nozzles 29 providing a large area‘ of impingement onto 55 a high temperature reaction zone such as a metallurgical
At the same time, cooling ?uid
of the device‘ as well as universal movement about its
longitudinal axis.
A source of suitable coolant such as
,the furnace charge.
furnace. Highly eflici'ent cooling of the device is obtained
?ows through the passageway 11 of the hollow inner mem
by providing optimum relationship between the inward
ber 10 and discharges from the end 22 directly onto
and outward ?ow of cooling fluid and by directing the
the inner surface of the domed end 21 and outwardly
incoming cooling ?uid onto portions of the device which
from the domed end 21 to the coolant outletrconnection
are subject to the highest temperatures, including the dis
‘19 through the chamber 113 in heat exchange relation
charge nozzles, while at the same time providing a device
ship with the inner surface of the hollow outer member
.which- is of ‘small cross-sectional area, as compared to
12 throughout the length of its inner end portion 17 and
devices provided by the prior art and which results in
also in heat exchange relationship with the elongated ' the
a substantial reduction of coolant demands. For exam
hollow members 14. The ?ow of coolant ?uid from
ple, ?uid transfer devices have been constructed and suc
the discharge end 22 of the passageway 11 into the cham
cessfully operated in accordance with the present inven
ber 13 traverses each of the nozzle structures 29 and is
in ‘heat interchange with portions of the domed. end 21 1 tion in which the outside diameter of the device has beenv
adjacent t-heidischarge openings of the'nozzle structures. ,
. substantially reduced and in which the coolant require
The feature of the present invention of providing a 70 'ments have been reduced from 6000 gallons per'hour re
quiredby the prior art to 4000-2500 gallons per hour.
plurality of elongated hollow members 14 for introduc.
The latter feature also results in a material reduction in
ing ?uid such as oxygen into the reaction zone of the
heat losses from the furnace which maybe of the order
furnace with the elongated hollow members being posi
of about 1,500,000pB.t.u. for each ?uid transfer device.
tioned in the chamber comprising the space between the
hollow inner member 10 and the hollow outer member 75 Although only one embodiment of the invention has
been disclosed and described herein, it is to be expressly
understood that various changes and substitutions may be
made therein Without departing from the spirit of the in
de?ne a coolant return passage within the elongated
chamber exterior to and in contact with the elongated
vention as well understood by those skilled in the art.
Reference therefore will ‘be had to the appended claims
for a de?nition of the limits of the invention.
What is claimed is:
l. A ?uid transfer device for introducing a ?uid into
the high temperature combustion Zone of a metallurgical
furnace from a point exterior to the furnace comprising 10
a ?uid inlet end located outside the furnace and a
?uid discharge end located within the furnace,
the ?uid inlet end including ?uid inlet means, coolant
inlet means, and coolant discharge means,
an elongated inner tubular member and an elongated 15
outer tubular member, with the elongated outer tubu~
?uid inlet tubes,
means connecting the ?uid inlet means to the elongated
?uid inlet tubes at the ?uid inlet end of the transfer
closure means at the discharge end of the transfer de
the closure means including an end wall joined to the
outer tubular member forming an end chamber com
municating with the coolant inlet passage and the
coolant return passage,
a plurality of individual ?uid nozzles with each ?uid
nozzle joined to a separate individual ?uid inlet tube
and extending through the end chamber and the end
wall of the closure means, and
lar member being in overlapping relationship with
means at the ?uid inlet end of the transfer device con
the elongated inner tubular member between the ?uid
necting the coolant return passage to the coolant dis
inlet end and the ?uid discharge end of the transfer
charge means.
2. The apparatus of claim 1 in which the inner tubu
the elongated inner tubular member de?ning a coolant
lar member extends into the end chamber of the closure
inlet passage located within the elongated inner tubu
means and terminates in spaced relationship to the end
lar member,
the outer surface of the inner tubular member being
3. The apparatus of claim 2 in which the plurality of
spaced from the inner surface of the elongated outer 25 ?uid nozzles are inclined outwardly from the longitudinal
tubular member to de?ne therebetween a single elon
axis of the device and in which the inner tubular member
overlaps a portion of each of the ?uid nozzles within the
end chamber.
gated chamber,
means connecting the coolant inlet means at the ?uid
inlet end of the transfer device to the coolant inlet
a plurality of elongated ?uid inlet tubes located in
spaced relationship within the elongated chamber de~
?ned by the outer surface of the inner tubular mem
ber and the inner surface of the outer tubular mem
her and extending longitudinally through the elon 35
gated chamber between the ?uid inlet end and the
?uid discharge end of the device,
the total cross sectional area of the elongated ?uid
inlet tubes being substantially less than the cross
sectional area of the elongated chamber so as to 40
References Cited in the ?le of this patent
Kalling et a1. ________ __ May 27, 1952
Schane _____________ __ Mar. 17, 1959
Great Britain _________ __ May 8, 1957
Great Britain ________ __ Apr. 23, 1958
Iron and Steel Engineer, pp. 65-75, February 1960.
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