US3588068A - Cupola exhaust apparatus - Google Patents

Cupola exhaust apparatus Download PDF

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Publication number
US3588068A
US3588068A US801666A US3588068DA US3588068A US 3588068 A US3588068 A US 3588068A US 801666 A US801666 A US 801666A US 3588068D A US3588068D A US 3588068DA US 3588068 A US3588068 A US 3588068A
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US
United States
Prior art keywords
cap
stack
cupola
plenum chamber
wall
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
US801666A
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English (en)
Inventor
Robert G Huntington
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.)
American Air Filter Co Inc
Original Assignee
American Air Filter Co Inc
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 American Air Filter Co Inc filed Critical American Air Filter Co Inc
Application granted granted Critical
Publication of US3588068A publication Critical patent/US3588068A/en
Assigned to CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE, WOODS KATHLEEN D., AS TRUSTEE reassignment CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLIS-CHALMERS CORPORATION A DE CORP.
Anticipated expiration legal-status Critical
Assigned to CITICORP NORTH AMERICA, INC. reassignment CITICORP NORTH AMERICA, INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SNYDERGENERAL CORPORATION, A MN CORP.
Assigned to SNYDERGENERAL CORPORATION A CORP. OF DELAWARE reassignment SNYDERGENERAL CORPORATION A CORP. OF DELAWARE RELEASE BY SECOND PARTY OF A SECURITY AGREEMENT RECORDED AT REEL 5013 FRAME 592. Assignors: CITICORP NORTH AMERICA, INC. A CORP. OF DELAWARE
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements

Definitions

  • ABSTRACT An exhaust arrangement for a metallurgical cupola including a cap for a cupola stack outlet, the cap having a plenum chamber disposed therein exhausted to a system below atmosphere pressure, the plenum chamber being in communication with the peripheral seal between the cap and stack outlet to facilitate removal of any stack gas leakage, the cap being floatingly mounted to permit more effective sealing with the stack outlet.
  • the present invention pertains to an improved metallurgical furnace offtake, and more particularly, to a new, useful and unobvious cap arrangement for a cupola stack outlet.
  • the present invention recognizing that these past cupola cap arrangements have been difficult in construction and maintenance and have presented leakage problems, provides a unique vented cupola cap which is straightforward and economical in both construction and operation, allowing quick installation and removal with minimum leakage when the cap is in its closed position, assuring that any exhaust gas leakage which might occur is carried off rapidly to a preselected destination.
  • the present invention provides an arrangement which permits utilization of a comparatively light cap'for sealing purposes, the cap being floatingly mounted to insure more effective sealing, and being so constructed with an internally disposed plenum chamber to permit cooling of the cap during normal operations.
  • the present invention provides an exhaust arrangement for a metallurgical cupola comprising: cupola stack means having a main gas ofitake and an ambient atmosphere stack outlet; removable cap means for the stack outlet, the peripheral edge of the cap means engaging with the peripheral edge of the stack means providing a peripheral seal to close the stack means from ambient atmosphere during normal cupola melting operations, the cap means having a plenum chamber disposed therein in communication with the peripheral seal between the cap means edge and the stack outlet edge; and duct ofl'take means in communication with the plenum chamber, the duct offtake means being connected to a pressure source below atmospheric to facilitate removal of any stack gas leakage.
  • the present invention provides a cap means including a seal wall floatingly suspended in spaced relation from a lift wall to define the plenum chamber therebetween, the seal wall engaging in peripherally sealed relation with the peripheral edge of the stack means outlet.
  • FIG. 1 is a plan view of the novel cupola cap arrangement
  • FIG. 2 is a cross-sectional side elevation view of the apparatus of FIG. 1 and a portion of the cupola stack;
  • FIG. 3 is an enlarged elevational view disclosing details of the floating cap arrangement of FIGS. 1 and 2;
  • FIG. 4 is an enlarged side view of the details of FIG. 3;
  • FIG. 5 is a cross-sectional side elevation view taken in a plane passing through line 5-5 of FIG. 1.
  • cupola stack 2 including refractory brick lining 3 and metal liner 4.
  • cupola stack 2 is provided with main gas offtake 6 leading to a suitable gas scrubbing apparatus (not shown) and to an ambient atmosphere stack outlet 7.
  • cap member 8 in
  • lift wall 9 connected at the end of pivotally mounted cantilever beam 11, suitable strengthening rib members 12 extending from cantilever beam 11 and being fastened to the upper portion of lift wall 9 to strengthen such lift wall.
  • the opposite end of cantilever beam 11 is provided with counterweight 13, the beam being pivotally mounted for removable displacement of the lift wall by means of shaft 14, the ends of which are rotatably mounted in spaced bearing blocks 16.
  • each of the support arms 17 is provided with a longitudinally extending slot 19; each support arm 17 extends intermediate a pair of spaced connecting arms 21 which are fastened to cap wall 18 and which pair of arms 21 have a pin 22 extending normal therebetween and through slot 19 of support arm 17 to thus support cap wall member 18 in spaced floating arrangement from lift wall member 9 and to provide plenum chamber 23 therebetween.
  • a suitable refractory lining 24 Mounted to the lower portion of the cap wall 18 is a suitable refractory lining 24, the cap wall and refractory being sized and adapted to engage with the upper portion of the refractory brick lining of the stack outlet 7 to provide a peripheral seal between the stack outlet and the ambient atmosphere, this seal communicating with plenum chamber 23.
  • wall 26 is provided along the periphery of lift wall 9 to extend downwardly around plenum 23, the peripheral wall 26 being provided with sealing lip 27 extending normally therefrom which engages with sealing lip 28 of peripheral wall member 29 surrounding stack outlet 7 of the cupola. It is to be noted that the seal formed between the two lips 27 and 28 also is in communication with plenum chamber 23.
  • plenum chamber 23 of cap member 8 is provided with an offtake duct 31, which in turn is connected at break flange 32 to duct 33, the duct 33 leading to a suitable area 35 in the metallurgical system having a pressure less than atmospheric, such as between the quencher and the scrubber.
  • cap 8 is suitably ventilated for any leakage around the peripheral seal formed between liner 24 and stack outlet 7 and any leakages which may occur around the ambient seal formed between lips 27 and 28, the exhaust gases being carried off to a preselected destination through plenum chamber 23 to cool cap 8 from the hot impact gases.
  • An exhaust arrangement for a metallurgical cupola comprising: cupola stack means having a main gas offtake and an ambient atmosphere stack outlet; removable cap means for said stack outlet, the peripheral edge of said cap means engaging with the peripheral edge of said stack means providing a peripheral seal to close said stack means from ambient atmosphere during normal cupola melting operations, said cap means having a plenum chamber disposed therein on communication with the peripheral seal between said cap means edge and said stack outlet edge; and duct offiake means in communication with said plenum chamber, said duct offtake means being connected to a pressure source below atmospheric pressure to facilitate removal of any stack gas leakage.
  • said cap means including a lift wall and a seal wall, said seal wall being floatingly suspended in spaced relation from said lift wall to define said plenum chamber, the peripheral edge of said seal wall engaging in peripherally sealed relation with the peripheral edge of said stack means outlet.
  • said lift wall having a peripheral sidewall depending therefrom including a sealing lip extending from the lower portion thereof, said stack outlet having a sealing lip extending around the outer periphery thereof to sealingly mate with the sealing lip of said sidewall, said plenum of said cap means communicating with said sealing lip to facilitate removal of any ambient atmosphere leakage.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
US801666A 1969-02-24 1969-02-24 Cupola exhaust apparatus Expired - Lifetime US3588068A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80166669A 1969-02-24 1969-02-24

Publications (1)

Publication Number Publication Date
US3588068A true US3588068A (en) 1971-06-28

Family

ID=25181741

Family Applications (1)

Application Number Title Priority Date Filing Date
US801666A Expired - Lifetime US3588068A (en) 1969-02-24 1969-02-24 Cupola exhaust apparatus

Country Status (4)

Country Link
US (1) US3588068A (ja)
JP (1) JPS4813202B1 (ja)
DE (1) DE2007720C3 (ja)
GB (1) GB1305084A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927859A (en) * 1972-12-22 1975-12-23 Hoogovens Ijmuiden Bv Blow off valve for a blast furnace
US5398669A (en) * 1992-11-10 1995-03-21 Mccullough; Sam Explosion dampener

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5171204A (en) * 1974-12-17 1976-06-19 Kubota Ltd Kinzokusonyubutsuno yokaisochi
JPS633209U (ja) * 1986-06-26 1988-01-11
NO322323B2 (no) * 2003-12-01 2016-09-13 Unodrill As Fremgangsmåte og anordning for grunnboring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927859A (en) * 1972-12-22 1975-12-23 Hoogovens Ijmuiden Bv Blow off valve for a blast furnace
US5398669A (en) * 1992-11-10 1995-03-21 Mccullough; Sam Explosion dampener

Also Published As

Publication number Publication date
DE2007720A1 (de) 1970-09-03
JPS4813202B1 (ja) 1973-04-26
DE2007720B2 (de) 1978-03-23
GB1305084A (ja) 1973-01-31
DE2007720C3 (de) 1978-11-23

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Legal Events

Date Code Title Description
AS Assignment

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

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

AS Assignment

Owner name: CITICORP NORTH AMERICA, INC., NEW YORK

Free format text: SECURITY INTEREST;ASSIGNOR:SNYDERGENERAL CORPORATION, A MN CORP.;REEL/FRAME:005013/0592

Effective date: 19881117

AS Assignment

Owner name: SNYDERGENERAL CORPORATION A CORP. OF DELAWARE

Free format text: RELEASE BY SECOND PARTY OF A SECURITY AGREEMENT RECORDED AT REEL 5013 FRAME 592.;ASSIGNOR:CITICORP NORTH AMERICA, INC. A CORP. OF DELAWARE;REEL/FRAME:006104/0270

Effective date: 19920326