US3907261A - Shut-down discharge apparatus - Google Patents

Shut-down discharge apparatus Download PDF

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Publication number
US3907261A
US3907261A US491351A US49135174A US3907261A US 3907261 A US3907261 A US 3907261A US 491351 A US491351 A US 491351A US 49135174 A US49135174 A US 49135174A US 3907261 A US3907261 A US 3907261A
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US
United States
Prior art keywords
valve
tubulure
flap
valve member
gas
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
US491351A
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English (en)
Inventor
Edouard Legille
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.)
Paul Wurth SA
Original Assignee
Anciens Etablissements Paul Wurth SA
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Filing date
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Application filed by Anciens Etablissements Paul Wurth SA filed Critical Anciens Etablissements Paul Wurth SA
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Publication of US3907261A publication Critical patent/US3907261A/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/002—Evacuating and treating of exhaust gases
    • C21B7/005—Bleeder valves or slides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement

Definitions

  • An exhaust valve for venting highly contaminated gas Fllfldi Jilly 1974 from an enclosure includes a pivotally mounted valve [2H APPL NO: 491 35] flap which opens inwardly toward the source of contaminated gas
  • the exhaust valve also includes a tubular member suitably shaped to pass through the valve Foreign Application Data seat; the tubular member being normally positioned at July 30, 1973 Luxemburg 63125 the discharge side of the valve. When the valve flap is opened the tubular member is inserted through the [52] US.
  • the present invention relates to controlling the flow of highly contaminated gases and particularly to relieving buildups of heated dirt laden gas. More specifically, this invention is directed to discharge valves for use on the exhaust mains of crude gas generators and particularly to blow off devices for mounting on blast furnace downcomers. Accordingly, the general objects of the present invention are to provide novel and improved methods and apparatus of such character.
  • the exhaust gas mains convey the top gas to a cleaning and cooling installation which, because of the high content of combustible constituents in the top gas, in turn releases the gas to a central gas supply system.
  • a temporary shut-down of a single reducing furnace be required for any reason, since a plurality of furnaces are typically associated with a single cleaning and cooling installation, contin ued delivery of the top gas from the disabled furnace toward the central gas supply system must be prevented because of the low discharge pressure of the furnace which has been shut-down and because the top gas composition is substantially changed from that which is discharged from the furnaces which remain operative.
  • shut-down discharge hats are valve devices mounted on the summit of the downcomers and unlocked to the open position only during furnace shut-down.
  • shut-down discharge devices have consisted of a sliding or swinging diaphragm device, operated by means of an associated drive, or have been characterized by a valve flap which may be opened either outwardly or inwardly.
  • shut-down exhaust devices of the type which employ a sliding or swinging diaphragm are subject, when the furnace is operative, to severe thermal stresses.
  • Such prior art shut-down discharge devices have, accordingly, had a tendency to undergo physical distortion after a period of time. Any such distortion or warpage renders the shut-down discharge device either impossible to open or precludes the requisite tight sealing when the device is again shut.
  • the movable closure device is in the open position the dirty and often steam moistened crude gas from the furnace will cause a deposit of particulate matter on the sealing surfaces of the device thereby impairing its sealing effectiveness.
  • shut-down discharge devices characterized by an outward opening valve member have the substantial disadvantage that, when in the closed position, they must counteract the forces produced by high furnace discharge pressure. This disadvantage, of course, is not present in the case of shut-down discharge devices which employ an inwardly opening valve flap member since the gas pressure operates to urge the closed flap against its sealing area.
  • previous shut-down discharge devices employing an in wardly opening valve member have the disadvantage that the valve flap, when in the open position, is exposed to the dirty and often wet gas emanating from the furnace.
  • shut-down discharge devices employing sliding or swinging diaphragms
  • inwardly opening valve flap type shut-down discharge devices are subjected to the corroding and eroding action of the gases being controlled and their sealing efficiency is significantly impaired by deposits of particulate matter.
  • shut-down discharge devices have been characterized by a rapid decline of effectiveness and the need for frequent repair. Since the shut-down discharge hats are located at rather inaccessible points repair work is difficult and time consuming.
  • the present invention overcomes the above briefly discussed and other deficiencies and disadvantages of the prior art by providing a novel and improved discharge valve for the exhaust mains of crude gas generators which will give trouble-free operation over long periods of time.
  • an exhaust valve consisting of an inwardly opening valve member or flap which is retracted from the gas stream when in the open position.
  • the present invention also includes vent pipe means which are axially movable with respect to the seat with which the valve flap cooperates.
  • the vent pipe means or tubulure is, with the valve in the normally closed position, disposed outwardly from and above the valve flap.
  • the vent pipe means or tubulure includes a fuel injector and igniter.
  • the tubulure thus may function as a flaring device to burn off combustible material in the gas being vented.
  • the exhaust valve housing and the movable tubulure cooperate to define an annular chamber which accomodates the valve flap when the shut-down discharge device is in the open condition.
  • Means may be provided to deliver a cooling medium under pressure to this annular chamber.
  • an exhaust valve assembly or shut-down discharge hat is indicated generally at l.
  • the assembly 1 includes a valve housing 2 which is connected, by means of a lower flange 3, to a pipe segment 4.
  • the pipe segment 4 is, in turn, connected by means of a flange joint 5 to the exhaust main 6 ofa reducing furnace.
  • the valve housing 2 is of larger diameter than the pipe segment 4.
  • the exhaust valve assembly 1 further includes a valve member or flap, indicated generally at 7, which has been shown by solid lines in the open position and by broken lines in the closed position.
  • a valve member or flap indicated generally at 7, which has been shown by solid lines in the open position and by broken lines in the closed position.
  • the valve flap 7 When in the closed or seated position the valve flap 7 is urged against a replaceable valve seat defining member or sealing ring 8. Movement of the valve flap 7 is controlled by an actuator, not shown but typically comprising a hydraulic jack, coupled to axle l0; rotational movement of axle 10 being transmitted to the valve flap 7 via an actuator arm 9.
  • the axle it] penetrates the wall of valve housing 2 and the arm 9 is positioned within the valve housing.
  • valve flap 7 is provided with a sealing ring l3 having a seating surface 14 of frustoconical shape.
  • the valve seat defining member 8 has a seating sur face 15 of frustoconical shape and is afflxed to an upper flange 12 of valve housing 2 by means of a plurality of bolts I]. If deemed necessary or desirable the seating surface l5 of the valve seat defining member 8 and the seating surface 14 of the valve flap 7 may be provided with a resilient sealing ring of a heat proof soft material such as an O-ring.
  • the valve flap 7 is provided. on its external or lower side, with a lifting lug l6.
  • Lifting lug 16 may be employed during the removal and installation of the valve flap 7; such operations on the valve flap being performed conjointly with installation and/or removal of the sealing ring 8.
  • the exhaust valve assembly 1 also comprises vent pipe means which includes a tubulure 17.
  • the diameter of tubulure I7 is less than that ol valve seat opening defined by sealing ring 8; the diameter of tubulure 17 being approximately equal to that of pipe segment 4.
  • the tubulure I7 is mounted on a supporting arm 18 which slides vertically, by means ofa roller mechanism 19, in a vertically extending frame 20.
  • the frame 20 is. mounted from the exterior of valve housing 2 and extends upwardly from the lower flange 3.
  • the tubulure I7 is shown in solid lines in the position it assumes with the valve flap 7 in the open position.
  • the control of the positioning of tubulure 17 is coupled to the movements of the valve flap such that, if the flap 7 is fully open, the tubulure is fully inserted in the valve housing 2.
  • the tubulure 17 isolates the valve flap 7 and the sealing ring 8 from direct impingement of the furnace gas being vented.
  • the tubulure l7 cooperates with the valve housing 2 to define an annular chamber 2
  • the valve flap 7 and the sealing ring 8 are accordingly substantially protected against erosion, corrosion and deposits of the particulate matter entrained in the exhaust gases being vented.
  • the tubulure 17 is provided, on its external surface, with stop members 24 which contact the outwardly extending flanges by which the sealing ring 8 is mounted on upper flange 12; the stop members 24 thus limiting the downward motion of the tubulure 17.
  • a gaseous coolant to the chamber 21 defined between the tubulure l7 and the valve housing 2.
  • an inert gas or cleaned and cooled top gas is supplied, via the connector 23 disposed on valve housing 2, to the interior of chamber 21.
  • the coolant will be delivered to chamber 21 at a somewhat higher pressure than that of the crude gas being discharged from the furnace so as to create a slight positive pressure differential between chamber 21 and the furnace exhaust main 6.
  • the vent pipe assembly may include, and in part define, a flaring device as indicated generally at 25.
  • the flaring device consists of an extension 26 of tubulure 17 which is coaxial with a jacket 28.
  • the extension 26 of the tubulure defines, at its upper end, a combustion chamber 27.
  • the jacket 28 is open at its lower end in order to permit the ingress of sufficient air to support combustion within the flaring device 25.
  • An injection nozzle 29 is disposed in tubulure extension 26 and a liquid or gaseous fuel is delivered to nozzle 29 via conduit 30.
  • An igniter 31 extends inwardly through the wall of jacket 28 immediately above the upper end of tubulure extension 26. The crude gas/fuel/air mixture will. accordingly, be ignited by device 31 and combustibles in the gas being exhausted from the furnace exhaust main 6 will be burned.
  • the flaring device 25 will be mounted for movement with the tubulure 17 on the carrying frame 20.
  • all or a portion of the device 25 may nevertheless be furnished as part of the discharge control device assembly and the injection nozzle 29 may be supplied with steam or a dragging gas.
  • a plate 33 may be inserted between the connection flanges 5. Thereafter, a man-hole 32, disposed in the wall of valve housing 2, will be opened thus affording accessibility to the valve flap 7 when the exhaust control valve is in the open position.
  • the shut-down discharge device of the present invention has the advantage that the flow control member comprises an inwardly opening valve flap which, in the closed position, is pressed against a cooperating valve seat by the pressure within the furnace exhaust main 6 thus insuring reliable sealing.
  • the valve flap When the valve is open the valve flap is completely retracted from the exhaust gas stream and protected against the deleterious effects of the exhaust gas entrained particulate matter as well as being protected from thermal stresses.
  • the service life of the discharge control devices of the present invention is substantially increased when compared to the prior art.
  • permits the use of resilient sealing material on the valve member thereby further enhancing the sealing reliability of apparatus in accordance with the invention.
  • valve housing means said housing means having an axis and first and second open ends, a first of said housing means open ends being coupled to a pressurized source of gas;
  • valve member pivotally supported within said housing means for cooperation with said valve seat, said valve member opening towards said housing means first end whereby the pressure of the source gasassists in sealing the valve member to the seat to prevent discharge of the gas;
  • vent pipe means having an external shape commensurate with the shape of said valve seat and having a smaller crosssectional area than said valve seat:
  • vent pipe means mounting said vent pipe means from said valve housing means for movement along said axis whereby a first end of said vent pipe means may be inserted through the valve seat when said valve member is in the open position to protect said valve seat and said valve member from direct impingement of the gas being discharged.
  • vent pipe means and said valve housing cooperate to define a chamber which receives said valve member when said valve member is in the open position.
  • valve member comprises:
  • actuating means for said valve flap extending outwardly through the wall of said valve housing means.
  • valve member comprises:
  • valve flap actuating means for said valve flap, said actuating means extending outwardly through the wall of said valve housing means.
  • vent pipe means comprises:
  • vent pipe means comprises:
  • valve member comprises:
  • valve flap actuating means for said valve flap, said actuating means extending outwardly through the wall of said valve housing means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Incineration Of Waste (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
US491351A 1973-07-30 1974-07-24 Shut-down discharge apparatus Expired - Lifetime US3907261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU68125 1973-07-30

Publications (1)

Publication Number Publication Date
US3907261A true US3907261A (en) 1975-09-23

Family

ID=19727421

Family Applications (1)

Application Number Title Priority Date Filing Date
US491351A Expired - Lifetime US3907261A (en) 1973-07-30 1974-07-24 Shut-down discharge apparatus

Country Status (10)

Country Link
US (1) US3907261A (ja)
JP (1) JPS5642795B2 (ja)
BE (1) BE817779A (ja)
CA (1) CA1030344A (ja)
DE (1) DE2433096A1 (ja)
ES (1) ES428755A1 (ja)
FR (1) FR2239628B1 (ja)
GB (1) GB1436493A (ja)
IT (1) IT1017679B (ja)
LU (1) LU68125A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385114B (de) * 1986-05-22 1988-02-25 Voest Alpine Ag Abblasvorrichtung fuer einen schachtofen
US7381383B1 (en) * 1998-05-13 2008-06-03 Hoei Shokai Co., Ltd. Treating apparatus, treating method and method of treating soil
LU91570B1 (en) * 2009-05-19 2010-11-22 Wurth Paul Sa Arrangement for burning blast furnace off-gas froma bleeder valve and corresponding bleeder valve.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU77488A1 (ja) * 1977-06-06 1977-09-22
DE102019006940A1 (de) * 2019-10-05 2021-05-06 Daniel Haug Vorrichtung zur Verzögerung von Metaldusting an den Kalt-Warmübergängen in Wärmebehandlungsanlagen, welche mit kohlenstoffhaltigen Atmosphären im Prozessinnenraum betrieben werden.
CN112696546A (zh) * 2020-12-30 2021-04-23 合肥恒大江海泵业股份有限公司 一种可调节高度的出水三通

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2200488A (en) * 1938-08-17 1940-05-14 Freyn Engineering Co Blast furnace construction

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2200488A (en) * 1938-08-17 1940-05-14 Freyn Engineering Co Blast furnace construction

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385114B (de) * 1986-05-22 1988-02-25 Voest Alpine Ag Abblasvorrichtung fuer einen schachtofen
US7381383B1 (en) * 1998-05-13 2008-06-03 Hoei Shokai Co., Ltd. Treating apparatus, treating method and method of treating soil
US20090005630A1 (en) * 1998-05-13 2009-01-01 Hoei Shokai Co., Ltd Treatment method and soil treatment method
LU91570B1 (en) * 2009-05-19 2010-11-22 Wurth Paul Sa Arrangement for burning blast furnace off-gas froma bleeder valve and corresponding bleeder valve.
WO2010133623A1 (en) 2009-05-19 2010-11-25 Paul Wurth S.A. Arrangement for burning blast furnace off-gas from a bleeder valve and corresponding bleeder valve
KR20120017451A (ko) * 2009-05-19 2012-02-28 풀 부르스 에스.에이. 블리더 밸브로부터 배출되는 용광로 배기 가스를 연소시키기 위한 장치 및 대응하는 블리더 밸브
CN102421922A (zh) * 2009-05-19 2012-04-18 保尔伍斯股份有限公司 用于燃烧来自排气阀的高炉废气的设备以及相应的排气阀
AU2010251179B2 (en) * 2009-05-19 2014-09-18 Paul Wurth S.A. Arrangement for burning blast furnace off-gas from a bleeder valve and corresponding bleeder valve
US8940226B2 (en) 2009-05-19 2015-01-27 Paul Wurth S.A. Arrangement for burning blast furnace off-gas from a bleeder valve and corresponding bleeder valve
KR101598181B1 (ko) 2009-05-19 2016-03-07 풀 부르스 에스.에이. 블리더 밸브로부터 배출되는 용광로 배기 가스를 연소시키기 위한 장치 및 대응하는 블리더 밸브
EA024433B1 (ru) * 2009-05-19 2016-09-30 Поль Вурт С.А. Установка для сжигания отходящего газа доменной печи из выпускного клапана и соответствующий выпускной клапан

Also Published As

Publication number Publication date
BE817779A (fr) 1974-11-18
JPS5642795B2 (ja) 1981-10-07
FR2239628B1 (ja) 1977-10-07
LU68125A1 (ja) 1973-10-23
DE2433096A1 (de) 1975-02-13
GB1436493A (en) 1976-05-19
IT1017679B (it) 1977-08-10
FR2239628A1 (ja) 1975-02-28
ES428755A1 (es) 1976-09-01
CA1030344A (en) 1978-05-02
JPS5043524A (ja) 1975-04-19

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