US3751220A - Fluid delivery system for rotary kiln - Google Patents

Fluid delivery system for rotary kiln Download PDF

Info

Publication number
US3751220A
US3751220A US3751220DA US3751220A US 3751220 A US3751220 A US 3751220A US 3751220D A US3751220D A US 3751220DA US 3751220 A US3751220 A US 3751220A
Authority
US
United States
Prior art keywords
kiln
pipe
delivery system
shell
fluid delivery
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
Other languages
English (en)
Inventor
E Rossi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allis Chalmers Corp
Original Assignee
Allis Chalmers 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
Application filed by Allis Chalmers Corp filed Critical Allis Chalmers Corp
Application granted granted Critical
Publication of US3751220A publication Critical patent/US3751220A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/8807—Articulated or swinging flow conduit

Definitions

  • ABSTRACT A rotary kiln is disclosed with a stationary hood mounted concentrically over the material feed end of the kiln. Fuel nozzles are mounted on the outer surface of the kiln shell and are connected to a manifold also mounted on the outer surface of the kiln shell. A fuel delivery tube connected to the manifold projects radially inwardlyto the interior of the kiln and then axially outwardly through the hood to the exterior of the kiln for connection'to the fuel supply. A cooling air pipe surrounds the portion of the fuel tube located in the interior of the kiln. Air is forced through the pipe to cool the fuel. A flexible ball joint is provided'in the cooling pipe to compensate for any misalignment between the rotating axis of the kiln and the stationary axis of the hood.
  • This invention relates to a fluid delivery system for rotary kilns having nozzles supported on the outer surface of the kiln, which are connected to a source of fuel by tubing extending partially through the interior of the kiln within a cooling air pipe.
  • the present invention relates to an assembly for the cooling air pipe which permits flexing of the pipe to compensate for misalignment between the rotating and stationary portions of the kiln.
  • Rotary kilns for reducing iron ore to a lower state of oxidation having nozzles projecting through a kiln shell for injecting fuel and air into the kiln are disclosed in the piping which extends along the axes of the rotating kiln and stationary hood.
  • a bellows connection between portions of the piping To overcome these bending stresses it is known in the prior art to include a bellows connection between portions of the piping. The bellows have not been satisfactory because they rupture at a reasonably early age.
  • U.S. Pat. No. 1,797,130 issued in 1931 accomplishes such fuel injection with a single tube extending along the central axis of the kiln and having nozzles which project radially outward from the tube.
  • U.S. Pat. Nos. 2,848,198, 3,182,980 and 3,196,938 provide several axially extending fuel conduits inside the kiln shell.
  • U.S. Pat. No. 3,01 1,722 discloses a double wall kiln with gaseous fuel being delivered to the space between the walls.
  • the kiln constructions disclosed in this group of patents all involve seals between stationary and rotating fuel delivery conduits having a diameter smaller than the outer diameter of the kiln but all these constructions-have two disadvantages.
  • One disadvantage is that the gaseous fuel conduits are not kept cool by exposure to the atmosphere of surrounding air, and a second disadvantage is that such conduits are hidden from view and cannot, therefore, be inspected while the kiln is in operation.
  • a more specific object of the subject invention is to provide a fluid delivery system of the hereinbefore described type wherein the slidable pipe joint is a ball joint which is provided with spring bearing means to insure engagement of the sliding portions of the pipe joint during relative axial expansions and contractions between the stationary and rotating portions of the kiln.
  • FIG. 1 is a fragmentary side elevation view of a rotary kiln having a fluid delivery system constructed in accordance with the present invention
  • FIG. 2 is an enlarged view of the cooling pipe flexible ball joint identified as A in FIG. 1;
  • FIG. 3 is an enlarged view of the spring means biasing the cooling pipe flexible ball joint into operative engagement located in the vicinity of B in FIG. 1.
  • a rotary kiln having a cylindrical shell 6 supported in any well known conventional manner (not shown) to rotate about a central axis.
  • the shell 6 is lined with a refractory material and provided with a plurality of nozzles (not shown) axially and circumferentially spaced about the surface of the kiln.
  • the nozzles extend through the kiln'shell 6 and are open to the interior or combustion chamber 7 defined by the kiln shell to provide access for fuel and air into the connective chamber.
  • a stationary hood 8 is mounted concentrically about the feed end of the kiln shell 6.
  • the kiln feed end fits into an opening provided into the hood and rotates relative thereto.
  • the combustion chamber 7 of the kiln is thereby open to the interior of the hood 8.
  • a rear wall 9 of the hood 8 is provided with an opening 11 which is in alignment with the axis of the kiln.
  • Fluid delivery tubing in the form of an oil tube 12 and a gas tube 13 extend through the opening 11 and a short distance into the combustion chamber 7 of the kiln.
  • the tubing 12 and 13 are then bent to extend radially outward through an opening 14 provided in the kiln shell.
  • the tubing is connected by means of a manifold (not shown) to fuel conduit 10 supported on the exterior of the kiln for rotation therewith.
  • the fuel conduit is then connected to the fuel nozzles.
  • the fuel tube 13 is for gas and the tube 12 is an auxiliary fuel tube for oil. lf gas is being used the oil tube 12 is sealed by means of caps 15.
  • auxiliary fuel tube 12 is supported within the gas or main fuel tube 13 in any conventional manner such as by spacers 20.
  • Each of these tubes must rotate with the kiln shell 6, and therefore a sealing means between the stationary and rotating parts of the tubes must be provided. Since the particular construction of this sealing means is not a portion of this invention it is not shown herein. However, an example of an acceptable type of sealing means is disclosed in US. Pat. No. 3,661,370 issued to the same inventor as this invention on May 9, 1972.
  • the gas tube 13 is supported on rollers 16 which permit rotation thereof with the kiln. Since the auxiliary tube 12 is supported within the gas tube 13, it rotates with the gas tube.
  • An air cooling pipe generally designated 17 surrounds the tubing 12 and 13 and extends through the opening 11 in the rear wall of the hood 8 to the interior of the combustion chamber 7.
  • the cooling pipe 17 has radially extending portions 18 and 19'which extend through the openings 14 through the kiln shell.
  • the air cooling pipe 17 is supported on rollers 21 located to the rear of the hood 8 in an air plenum 22.
  • Cooling air delivery means herein shown schematically as a compressor 23 provides cooling air into the plenum 22 from which it flows through the pipe 17 and the radially directed portions 18 and 19 to the exterior of the kiln shell ,through the openings 14.
  • the cooling air flows about the fuel tubing thereby cooling these tubes and the fuel therein as they pass through the combustion chamber of the kiln.
  • a flexible ball joint generally designated 24 and shown more clearly in FIG. 2 is provided. As herein shown for purposes of illustration this flexible ball joint includes a pipe joint having two hemispherical surfaces 26 and 27 which are in slidable engagement with one another. A carbon or cast iron insert 28 may be provided to assist in the sliding movement between the joint halves.
  • a shield 29 may be provided about the joint to assist in deflecting the heat from the combustion chamber from the joint.
  • a conduit 31 extending through the air pipe portions 19 provides lubrication for the flexible joint 24. It should also be noted that the joint will be exposed to the cooling air as it passes through the pipe. This connection will compenseated in a flange 34 supported on the fuel tube 13.
  • a fluid delivery system for a rotary ore reducing kiln comprising: a rotating elongated cylindrical shell defining a combustion chamber; fluid conduit means i supported on the exterior of said shell for rotation therewith; a stationary hood located concentric with said kiln shell and having an opening in communication with said combustion chamber; pipe means extending through said hood axially into said chamber and including a radially disposed portion extending through said shell to the exterior thereof, said pipe means rotating with said kiln; a slidable pipe joint associated with said pipe means adapted to permit angular movement of said pipe means to compensate for misalignment between said shell and said hood; and fluid tube means extending through said pipe means connected in fluid communication with said fluid conduit means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Manufacture Of Iron (AREA)
  • Incineration Of Waste (AREA)
US3751220D 1972-11-24 1972-11-24 Fluid delivery system for rotary kiln Expired - Lifetime US3751220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30952972A 1972-11-24 1972-11-24

Publications (1)

Publication Number Publication Date
US3751220A true US3751220A (en) 1973-08-07

Family

ID=23198596

Family Applications (1)

Application Number Title Priority Date Filing Date
US3751220D Expired - Lifetime US3751220A (en) 1972-11-24 1972-11-24 Fluid delivery system for rotary kiln

Country Status (5)

Country Link
US (1) US3751220A (en:Method)
JP (1) JPS525405B2 (en:Method)
BR (1) BR7309205D0 (en:Method)
CA (1) CA989612A (en:Method)
GB (1) GB1421057A (en:Method)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090842A (en) * 1976-12-21 1978-05-23 Allis-Chalmers Corporation Support for reduction kiln gas-on system independently of firing hood
US4342554A (en) * 1980-05-06 1982-08-03 Rohrbach Technologie Kg Baustofftechnik Gmbh & Co. Production of expanded clay and shale
US4437418A (en) 1980-12-05 1984-03-20 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Methods of and apparatus for treating waste products
US4767323A (en) * 1987-06-22 1988-08-30 Westinghouse Electric Corp. Lime kiln and method of retarding formation of slag ring therein
US5238401A (en) * 1991-04-02 1993-08-24 Westinghouse Electric Corp. Slagging rotary kiln
WO1994012840A1 (en) * 1992-11-27 1994-06-09 F.L. Smidth & Co. A/S Flexible air supply connection in a grate cooler
US5711664A (en) * 1995-08-03 1998-01-27 Commissariat A L'energie Atomique Rotary melting furnace
US6474984B2 (en) 2000-11-20 2002-11-05 Metso Minerals Industries, Inc. Air injection for nitrogen oxide reduction and improved product quality
CN103575095A (zh) * 2013-11-14 2014-02-12 山东恒远利废技术发展有限公司 一种瀑落式回转窑
KR20210142137A (ko) * 2019-03-14 2021-11-24 진강 뉴 머티리얼즈 씨오., 엘티디. 세분화된 온도 제어를 할 수 있는 회전 소성로

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592899A (en) * 1949-06-11 1952-04-15 Robert C Hopkins Burner equipment for rotary driers for aggregates
US3017202A (en) * 1958-03-14 1962-01-16 Swaney Robert Casper Cooled rotary joint having a plurality of concentrically arranged conduits
US3337186A (en) * 1965-04-28 1967-08-22 United Aircraft Corp Liquid supply to a rotating shaft
US3461037A (en) * 1964-07-03 1969-08-12 Still Fa Carl Inclined rotary furnace

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592899A (en) * 1949-06-11 1952-04-15 Robert C Hopkins Burner equipment for rotary driers for aggregates
US3017202A (en) * 1958-03-14 1962-01-16 Swaney Robert Casper Cooled rotary joint having a plurality of concentrically arranged conduits
US3461037A (en) * 1964-07-03 1969-08-12 Still Fa Carl Inclined rotary furnace
US3337186A (en) * 1965-04-28 1967-08-22 United Aircraft Corp Liquid supply to a rotating shaft

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090842A (en) * 1976-12-21 1978-05-23 Allis-Chalmers Corporation Support for reduction kiln gas-on system independently of firing hood
US4342554A (en) * 1980-05-06 1982-08-03 Rohrbach Technologie Kg Baustofftechnik Gmbh & Co. Production of expanded clay and shale
US4437418A (en) 1980-12-05 1984-03-20 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Methods of and apparatus for treating waste products
US4767323A (en) * 1987-06-22 1988-08-30 Westinghouse Electric Corp. Lime kiln and method of retarding formation of slag ring therein
US5238401A (en) * 1991-04-02 1993-08-24 Westinghouse Electric Corp. Slagging rotary kiln
WO1994012840A1 (en) * 1992-11-27 1994-06-09 F.L. Smidth & Co. A/S Flexible air supply connection in a grate cooler
US5584686A (en) * 1992-11-27 1996-12-17 F. L. Smidth & Co. As Flexible air supply connection in a grate cooler
US5711664A (en) * 1995-08-03 1998-01-27 Commissariat A L'energie Atomique Rotary melting furnace
US6474984B2 (en) 2000-11-20 2002-11-05 Metso Minerals Industries, Inc. Air injection for nitrogen oxide reduction and improved product quality
CN103575095A (zh) * 2013-11-14 2014-02-12 山东恒远利废技术发展有限公司 一种瀑落式回转窑
CN103575095B (zh) * 2013-11-14 2015-07-22 山东恒远利废技术发展有限公司 一种瀑落式回转窑
KR20210142137A (ko) * 2019-03-14 2021-11-24 진강 뉴 머티리얼즈 씨오., 엘티디. 세분화된 온도 제어를 할 수 있는 회전 소성로

Also Published As

Publication number Publication date
AU6273673A (en) 1975-06-19
JPS4982507A (en:Method) 1974-08-08
BR7309205D0 (pt) 1974-08-29
CA989612A (en) 1976-05-25
GB1421057A (en) 1976-01-14
DE2358252B2 (de) 1975-10-23
JPS525405B2 (en:Method) 1977-02-14
DE2358252A1 (de) 1974-06-06

Similar Documents

Publication Publication Date Title
US3751220A (en) Fluid delivery system for rotary kiln
KR100323397B1 (ko) 가스터빈
US8465278B2 (en) Apparatus and method for heat recovery from rotary kilns
US4023832A (en) Apparatus for the transmission of heated fluid
US4281510A (en) Gas turbine plant
US3502139A (en) Planetary coolers for use with rotary kilns
US2253098A (en) Rotary kiln or drier
US3661370A (en) Gas delivery manifold and processed material discharge assembly for rotary kiln
US3697058A (en) Oxygen toyere of a steel-melting mill
US2467945A (en) Valve for gas ducts
US4090842A (en) Support for reduction kiln gas-on system independently of firing hood
GB1409738A (en) Means for interconnecting two high-pressure and or high- temperature vessels lines or the like to one another
JPH10281414A (ja) ガス化炉用バーナ
US2971751A (en) Cooling apparatus
US3980286A (en) Tuyere feed lines
US2107439A (en) Furnace burner
US4209175A (en) Articulated seal for rotating cylinder such as kiln or the like
CN1078619C (zh) 用于冷却氧气顶吹转炉托圈的装置与方法
US1675416A (en) Rotary kiln and cooler
US12504233B2 (en) Reducing gas injection system
US2924269A (en) Blast furnace stove gas-port and burner nozzle connection
CA1212541A (en) Apparatus for discharging solids from a shaft furnace
JPH0662215B2 (ja) 高温粉体の輸送用管体
US3290029A (en) Recovery of radiant heat losses from shells of rotary kilns
US4679774A (en) Fluid conduit coupling for a metallurgical converter trunnion

Legal Events

Date Code Title Description
AS Assignment

Owner name: WOODS KATHLEEN D., AS TRUSTEE

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329

Owner name: CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329