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March 26, 1963 E. F. KURZlNSKl 3,082,997 FLUID TRANSFER DEVICE Filed May 3, 1960 COOLANT INVEN TOR. 29 29 2. EDWARD F. KURZINSKI WM‘ M A TTORNE YS United grates Patent @ 3,982,997 Patented Mar. 26, 1963 1 2 3,082,997 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 FLUID TRANSFER DEVICE 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 oxygen. 45 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 the 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 55 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 65 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 70 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 3,082,997 3 4 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. 7 . 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; region 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 60 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 3,082,997 5 6 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 device, closure means at the discharge end of the transfer de vice, 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. device, 2. The apparatus of claim 1 in which the inner tubu 20 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, wall. 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 passage, a plurality of elongated ?uid inlet tubes located in 30 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 UNITED STATES PATENTS 2,598,393 Kalling et a1. ________ __ May 27, 1952 2,878,115 Schane _____________ __ Mar. 17, 1959 774,454 793,655 Great Britain _________ __ May 8, 1957 Great Britain ________ __ Apr. 23, 1958 FOREIGN PATENTS OTHER REFERENCES Iron and Steel Engineer, pp. 65-75, February 1960.