US3894726A - Cascade water cooler aerator-multiplyer - Google Patents

Cascade water cooler aerator-multiplyer Download PDF

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Publication number
US3894726A
US3894726A US518540A US51854074A US3894726A US 3894726 A US3894726 A US 3894726A US 518540 A US518540 A US 518540A US 51854074 A US51854074 A US 51854074A US 3894726 A US3894726 A US 3894726A
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US
United States
Prior art keywords
water
shell
porous
aerator
porous sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US518540A
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English (en)
Inventor
Jay R Hopkins
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United States Steel Corp
Original Assignee
United States Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US518540A priority Critical patent/US3894726A/en
Application filed by United States Steel Corp filed Critical United States Steel Corp
Priority to CA227,408A priority patent/CA1031160A/en
Publication of US3894726A publication Critical patent/US3894726A/en
Application granted granted Critical
Priority to GB33589/75A priority patent/GB1514973A/en
Priority to NL7509968A priority patent/NL7509968A/xx
Priority to BE159442A priority patent/BE832720A/xx
Priority to FR7526433A priority patent/FR2289867A1/fr
Priority to DE19752538160 priority patent/DE2538160A1/de
Priority to ES440550A priority patent/ES440550A1/es
Priority to IT69158/75A priority patent/IT1041624B/it
Priority to JP50105561A priority patent/JPS5159068A/ja
Assigned to USX CORPORATION, A CORP. OF DE reassignment USX CORPORATION, A CORP. OF DE MERGER (SEE DOCUMENT FOR DETAILS). Assignors: UNITED STATES STEEL CORPORATION (MERGED INTO)
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor

Definitions

  • Said aerator-multiplyer having a plurality of porous sheet surfaces to collect, aerate and direct the [56] Reierences Cited water evenly onto the furnace shell.
  • One well known practice for cooling the bosh portion of a blast furnace is to provide a continuous cascading water flow over the outer shell in contact with the bosh lining. This is usually done by providing an annular water manifold around the bosh and spaced slightly away therefrom just below the mantle. A large number of evenly spaced nozzles are provided around the inside of the manifold to direct closely spaced streams of water against the bosh shell. The water thus spreads over the shall and cascades downward by the force of gravity to cool the bosh.
  • an object of this invention is to provide a simple and inexpensive means for improving the cooling characteristics of cascading water on a blast furnace bosh sectionv
  • Another object of this invention is to provide a simple wire screen aerator-multiplyer to be used in combination with a conventional cascading water cooling system for cooling a blast furnace bosh section to improve the cooling characteristics thereof.
  • a further object of this invention is to provide a simple wire screen aerator-multiplyer to be used in combination with a conventional cascading water cooling system for cooling a blast furnace bosh section which provides a heavier and more uniform water flow over the bosh outer shell.
  • Still another object of this invention is to provide a simple wire screen aerator-multiplyer for improving the cooling effect of any cascading water cooling system.
  • FIG. 1 is a partial section view through one wall of a blast furnace bosh section and the encircling water manifold showing the water spray system in operation according to prior art practice.
  • FIG. 2 is a partial elevation of the system shown in FIGv 1.
  • FIG. 3 is identical to FIG. 1 except that the aeratormultiplyer of this invention is shown in place.
  • FIG. 4 is a partial elevation of the system shown in FIG. 3.
  • FIG. 5 is a section view of an aerator-multiplyer according to one embodiment of this invention.
  • FIGS. 1 and 2 will illustrate the prior art system of cooling a blast furnace bosh section with cascading water wherein the blast furnace bosh lining 10 and adjacent shell 12 are cooled by a large number of water jets l4 emerging from a spray header 16 through nozzles 18.
  • the velocity and pressure of water jets 14 must be minimized in order to prevent or minimize splashing as the water strikes shell 12.
  • the thickness of the water film running down the face of shell 12 can usually be maximized to I/I6- to 3/32-inch without water dropping off vertically downward.
  • the cooling efficiency of the above described cooling system is increased 4 to 5 times by placing a simple aerator-multiplycr 20 around the blast furnace bosh at the line where the water jets l4 impinge so that the water will impinge onto the aerator-multiplycr 20.
  • the aerator-multiplyer 20 consists of a plurality of porous sheet surfaces which aerates, and more evenly distributes the water onto the surface of shell 12.
  • aerator-multiplyer 20 is fabricated from a strip of wire screen whereby the plurality of sheet surfaces are provided by horizontal folds in the screen.
  • one well proven form is to fold the screen into a triangular cross-section as shown in FIG. 5, wherein an upper horizontal surface 22 is provided to receive the impact of water jets I4, and the inclined side surface 24 is intended for direct contact with the surface of shell 12.
  • the triangular form is completed by the outer surface 26, while a plurality of inside surfaces 28 are provided between surfaces 24 and 26, with the lower edges of surfaces 26 and 28 at or near the surface of shell 12. Surfaces 26 and 28 are intended to catch any water falling through porous surface 22 and direct that water to the surface of shell 12.
  • the above described aerator-multiplyer 20 is preferably fabricated into a plurality of arcuate sections which are then placed end'to-end around the blast furnace bosh.
  • the arcuate sections can be held in place by any suitable means such as for example pins or nails 30 welded onto the face of shell I2.
  • FIGS. 3 and 4 will illustrate the operation of the above described embodiment of this invention.
  • a large number of water jets 14 are emitted from a spray manifold 16 through nozzles 18.
  • the water jets 14 do not directly impinge onto shell 12, but rather impinge onto aeratonrnultiplyer 20, preferably on the upper surface 22 thereof.
  • surface 22 is a porous wire screen, the water jets 14 are aerated and broken up with some of the water flowing along the surfaces of the individual wires to surface 24 and hence onto the surface of shell 12, while the balance of the water passes through the porous surface 22 and onto the porous surface 26 and 28 therebelow.
  • aerator-multiplyer 20 Since surfaces 26 and 28 are inclined towards shell 12, this water too ultimately flows onto shell 12. Accordingly, the several porous surfaces of aerator-multiplyer 20 will collect most of, if not all of the sprayed water and deposit it in aerated form onto shell 12. As illustrated in FIG. 4, aeratormultiplyer 20 causes the sprayed water to spred laterally more quickly, thus greatly minimizing the unwetted areas between water jets 14 (contrast to FIG. 2). More surprising however, is the fact that the aeratormultiplyer 20 will not only provide a more uniform water film on shell [2, but will permit an increase in the amount of sprayed water of 4 to times greater, with the water film thickness maximized at about /s-inch without water dropping therefrom.
  • the aeratonmultiplyer 20 was fabricated from A-lllCl'l galvanized steel wire screen folded into a crosssectional configuration as shown in FlG. 5, in a plurality of arcuate sections 3 feet long.
  • a plurality of Via-inch diameter nails 30 were welded around shell 12 on about 18-inch centers. The aeratormultiplyer sections were then impaled onto the nails 30 and held tightly against shell 12 with large washers (not shown) tightly fit over nails 30.
  • the aerator-multiplyer 20 attached substantially as shown in FIGS 3 and 4 permitted a 4 to 5 fold increase in water emitted through nozzles 18 without significant splashing or drop-off.
  • water film thicknesses cascading down the surface of shell 12 were easily maintained at from /s to %inch with a resulting substantial increase in cooling efficiency.
  • it was difficult to numerically measure cooling efficiency use of the above described embodiment with the increased water flow, has permitted the use of cheaper carbon brick in the furnace bosh section with a life span at least equal to that of the more expensive ceramic brick normally used and cooled by prior art methods, and has further reduced unschcd uled furnace outages.
  • porous sheet surfaces could be formed from materials other than wire screen, e.g., sheet metal hav ing a large number of small holes punched therethrough, or even nonmetallic materials such as woven fiber glass or asbestos.
  • the configuration of the various porous sheet surfaces can be greatly varied, although it is obvious that such surfaces should be somewhat pivotally spaced from each other so that the lower edge of each will deposit its water onto shell 12 or onto another sheet surface, the idea being of course to direct all the water inward towards shell 12 to be eventually deposited thereon.
  • this invention could be used to cool surfaces other than blast furnace surfaces where at least one water jet is directed thereagainst.
  • the advantages are of course best realized when such surfaces to be cooled are sub stantially vertical where heavy water films thereon are difficult to maintain.
  • an aerator-multiplyer having a plurality of porous sheet surfaces attached to said hot surface such that the water jet is directed onto said aerator-multiplyer and the porous sheet surfaces thereof more evenly distributes the water onto said hot surface, and allows a greater flow of water on the hot surface without drop-off.
  • porous sheet surfaces define a substantially triangular cross-section, said porous surfaces spaced apart along the top edges thereof and the bottom edges converged together at the hot surface.
  • porous sheet surfaces are formed from a single sheet of porous material folded to define the individual porous sheet surfaces.
  • an apparatus for cooling blast furnace lining wherein said lining is supported against an outer shell structure and a plurality of water jets are directed against said shell so that the water therefrom will run down the surface of said shell to cool the shell and adja cent furnace lining
  • the improvement comprising an aerator-multiplyer having a plurality of porous sheet surfaces attached to said shell such that the water jets are directed onto said aerator-multiplyer and the porous sheet surfaces thereof evenly distribute the water onto the shell, and allows a greater flow of water on the shell without dropoff.
  • porous sheet surfaces define a substantially triangular cross-section, said porous surfaces spaced apart along the top edges thereof and the bottom edges converged together at the hot surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Blast Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
US518540A 1974-10-29 1974-10-29 Cascade water cooler aerator-multiplyer Expired - Lifetime US3894726A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US518540A US3894726A (en) 1974-10-29 1974-10-29 Cascade water cooler aerator-multiplyer
CA227,408A CA1031160A (en) 1974-10-29 1975-05-21 Cascade water cooler aerator multiplyer
GB33589/75A GB1514973A (en) 1974-10-29 1975-08-12 Cooling apparatus
NL7509968A NL7509968A (nl) 1974-10-29 1975-08-22 Inrichting voor het afkoelen van een in hoofd- zaak vertikaal heet oppervlak.
BE159442A BE832720A (fr) 1974-10-29 1975-08-25 Aerateur-multiplicateur pour refroidisseur a eau en cascade
FR7526433A FR2289867A1 (fr) 1974-10-29 1975-08-27 Aerateur-multiplicateur pour refroidisseur a eau en cascade
DE19752538160 DE2538160A1 (de) 1974-10-29 1975-08-27 Kuehlvorrichtung
ES440550A ES440550A1 (es) 1974-10-29 1975-08-28 Un aparato para enfriar una superficie caliente sustancial- mente vertical.
IT69158/75A IT1041624B (it) 1974-10-29 1975-08-28 Dipsositivo per il raffreddamento di superfici sostanzialmente verticali particolarmente rivestimenti di altiforni
JP50105561A JPS5159068A (ja) 1974-10-29 1975-08-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US518540A US3894726A (en) 1974-10-29 1974-10-29 Cascade water cooler aerator-multiplyer

Publications (1)

Publication Number Publication Date
US3894726A true US3894726A (en) 1975-07-15

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ID=24064377

Family Applications (1)

Application Number Title Priority Date Filing Date
US518540A Expired - Lifetime US3894726A (en) 1974-10-29 1974-10-29 Cascade water cooler aerator-multiplyer

Country Status (10)

Country Link
US (1) US3894726A (ja)
JP (1) JPS5159068A (ja)
BE (1) BE832720A (ja)
CA (1) CA1031160A (ja)
DE (1) DE2538160A1 (ja)
ES (1) ES440550A1 (ja)
FR (1) FR2289867A1 (ja)
GB (1) GB1514973A (ja)
IT (1) IT1041624B (ja)
NL (1) NL7509968A (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677737A1 (fr) * 1991-06-17 1992-12-18 Lorraine Laminage Dispositif de refroidissement d'une paroi exterieure d'une enceinte soumise a haute temperature.
EP0519553A1 (en) * 1991-06-19 1992-12-23 Hoogovens Groep B.V. Method of repair of the refractory lining of the wall of a shaft furnace
EP0694733A1 (en) * 1994-07-25 1996-01-31 Daidotokushuko Kabushikikaisha Waste melting furnace and a method of melting wastes
CN103206871A (zh) * 2013-03-23 2013-07-17 中铁隧道集团有限公司 一种盾构机循环水冷却工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55180747U (ja) * 1979-06-13 1980-12-25
DE3027464C2 (de) * 1980-07-19 1982-07-22 Korf & Fuchs Systemtechnik GmbH, 7601 Willstätt Verfahren und Vorrichtung zum Kühlen eines Wandbereiches eines metallurgischen Ofens, insbesondere eines Lichtbogenofens
CN106382830B (zh) * 2016-11-10 2018-05-22 湖南元亨科技股份有限公司 一种复合式冷却塔

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2711311A (en) * 1954-01-27 1955-06-21 United States Steel Corp Cooling system for blast furnace
US3845813A (en) * 1973-01-10 1974-11-05 Obourg Sa Ciments Water cooling of wall surfaces

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2711311A (en) * 1954-01-27 1955-06-21 United States Steel Corp Cooling system for blast furnace
US3845813A (en) * 1973-01-10 1974-11-05 Obourg Sa Ciments Water cooling of wall surfaces

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677737A1 (fr) * 1991-06-17 1992-12-18 Lorraine Laminage Dispositif de refroidissement d'une paroi exterieure d'une enceinte soumise a haute temperature.
EP0519553A1 (en) * 1991-06-19 1992-12-23 Hoogovens Groep B.V. Method of repair of the refractory lining of the wall of a shaft furnace
EP0694733A1 (en) * 1994-07-25 1996-01-31 Daidotokushuko Kabushikikaisha Waste melting furnace and a method of melting wastes
CN103206871A (zh) * 2013-03-23 2013-07-17 中铁隧道集团有限公司 一种盾构机循环水冷却工艺

Also Published As

Publication number Publication date
GB1514973A (en) 1978-06-21
IT1041624B (it) 1980-01-10
FR2289867A1 (fr) 1976-05-28
DE2538160A1 (de) 1976-05-06
JPS5159068A (ja) 1976-05-22
ES440550A1 (es) 1977-03-01
CA1031160A (en) 1978-05-16
BE832720A (fr) 1976-02-25
NL7509968A (nl) 1976-05-04

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AS Assignment

Owner name: USX CORPORATION, A CORP. OF DE, STATELESS

Free format text: MERGER;ASSIGNOR:UNITED STATES STEEL CORPORATION (MERGED INTO);REEL/FRAME:005060/0960

Effective date: 19880112