US3843104A - Furnace-top distributor for shaft furnaces - Google Patents

Furnace-top distributor for shaft furnaces Download PDF

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Publication number
US3843104A
US3843104A US00384411A US38441173A US3843104A US 3843104 A US3843104 A US 3843104A US 00384411 A US00384411 A US 00384411A US 38441173 A US38441173 A US 38441173A US 3843104 A US3843104 A US 3843104A
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US
United States
Prior art keywords
shaft
gas
inlet port
furnace
outlet port
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
US00384411A
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English (en)
Inventor
H Burger
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Georg Fischer AG
Original Assignee
Georg Fischer AG
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Filing date
Publication date
Application filed by Georg Fischer AG filed Critical Georg Fischer AG
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Publication of US3843104A publication Critical patent/US3843104A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals
    • F27D99/0075—Gas curtain seals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types

Definitions

  • let port are formed in the opposite sides of the upper portion of the shaft so that a flow of gas from the inlet
  • the present invention is directed to a top distributor for shaft furnaces, especially cupola furnaces, having a charging aperture in the upper portion of the furnace and, more particularly, it is directed to the arrangement of a gas inlet port and gas outlet port for directing a flow of gas across the shaft transversely of the flow of gases within the shaft.
  • top distributors have been used in cupola furnaces to keep the charging opening closed even during charging operations.
  • German Patent No. 1,250,600 a cupola furnace is disclosed with a charging bucket positioned in the charging opening so that it forms a closure for the opening.
  • a two-part locking device is incorporated into the throat of the furnace and is designed as a slide which can be actuated following the placement of the charging bucket.
  • the two-part locking device is opened, the bottom lock of the charging bucket is opened so that the charge flows into the cupola furnace.
  • the two-part locking device designed as a slide incorporated into the throat of the cupola furnace is closed. This arrangement has been used in a variety of embodiments.
  • FIG. 1 is a schematic representation of the upper part of a cupola furnace illustrated in a vertical crosssectional view and embodying the present invention
  • FIG. 2 is a transverse cross-sectional view taken along the line [-1 of FIG. 1;
  • FIG. 3 is a view, similar to FIG. 1, of the schematic arrangement of the upper part of the cupola furnace displaying another embodiment of the present invention
  • FIG. 4 is a schematic representation of the upper part of a cupola furnace in a cross-sectional view similarto FIG. 1 and illustrating the arrangement of the exhaust gas lines from the furnace in combination with the arrangement of the present invention
  • FIG. 5 is a view, similar to FIG. 4, showing another arrangement of the present invention connected to the exhaust gas lines;
  • FIG. 6 is another representation, similar to FIG. 4, showing still another arrangement of the present inventron.
  • FIG. 1 the upper part of a cupola furnace 16 is shown schematically with a shaft portion 1 projecting upwardly into the furnace throat 10.
  • the shaft portion 1 has an upper frusto-conical portion and a lower substantially cylindrical portion extending downwardly into the furnace shaft 21.
  • the shaft portion 1 forms a space for receiving the charge as it passes downwardly into the furnace shaft.
  • the shaft portion 1 is spaced radially inwardly from the furnace throat 10 so that an annular space 15 is formed between the two into which flue gasespass prior to flowing outwardly through the flue gas line 12.
  • a charging aperture 2 is formed in throat wall 3.
  • a slot-shaped gas supply port 6 extends around a portion of the circumference of the throat wall.
  • the supply or inlet port 6 is funnelshaped with its larger end connected to the throat wall and its smaller end projecting outwardly from it.
  • An exhaust or outlet port 9 is formed in the throat wall on the opposite side from the inlet port 6 and is also funnelshaped with its larger end connected to the throat wall and its smaller end projecting outwardly from it.
  • FIGS. 1, 2 and 3 it can be seen that the cross-sectional area of the inlet port 6, at its connection to the throat wall 3, is smaller than the cross-sectional area of the outlet port at the similar location.
  • the combination of the inlet and outlet ports defines a transverse crosssectional area 14 in the throat which is larger than the cross-sectional areas of the throat immediately above and below the area 14, note FIG. 2. Further, in accordance with the present invention, it is possible to arrange a plurality of inlet and outlet ports 6, 9 at different levels in the furnace throat 10 with one outlet port 9 or a plurality of outlet ports 9' associated with each of the inlet ports 6.. Furthermore, it is also possible to vary the direction of the oppositely disposed opening axes.
  • a supply conduit 5 extends between a thrust generator 4 and the inlet port 6.
  • the thrust generator 4 is, for example, a variable output fan which is connected to the flue gas line 12 connected to the annular space 15 at the upper end of the furnace shaft.
  • the thrust generator can also be connected into the gas line from the furnace at a point where unpurified gas is being conveyed between a gas processing chamber 28 and a gas cooler and filter 29.
  • the thrust generator can be connected to the exhaust gas line downstream from the gas filter where the line conveys purified gas, note FIG. 5.
  • the thrust generator 4 can be connected to a line 22 for drawing in ambient air for supply to the inlet port 6, note FIG. 6.
  • An exhaust conduit 8 connects the outlet port 9 to a suction device 7, such as a variable output fan, and the suction device is connected, in turn, to the flue gas exhaust line 12.
  • a suction device 7 such as a variable output fan
  • the suction device is connected, in turn, to the flue gas exhaust line 12.
  • a dust separator 13 shown in dashed lines, and/or a safety burner 20 is connected to the exhaust conduit 8 upstream from the suction device.
  • FIG. 3 the upper part of a cupola furnace 18 is shown in a schematic manner and, as distinguished from FIG. 1, it does not contain a flue gas exhaust outlet located below the charging aperture.
  • a charge aperture 26 of conventional design is formed in the furnace wall 27.
  • a slot-shaped gas supply inlet port 6 is connected to and extends about a portion of the circumferential periphery of the wall.
  • the inlet port 6 is funnelshaped with its larger end connected to the furnace wall and its smaller end disposed outwardly from the wall.
  • a slot-shaped gas outlet port 9 Situated diametrically opposite the inlet port is a slot-shaped gas outlet port 9 also having a funnelshaped configuration with its larger end connected to the circumferential periphery of the wall and its smaller end located outwardly from the wall.
  • the cross-sectional area of the inlet port 6 is smaller than that of the outlet port 9 in accordance with the functioning of the arrangement.
  • the walls of the ports 6, 9 form a throat cross-section similar to that shown in FIG. 2, which is larger than the cross-sectional area within the furnace immediately above and below the throat cross-section formed by the ports.
  • a single exhaust port 9 or multiple exhaust ports 9' may be arranged diametrically opposite the supply port 6. Further, the arrangement of the axes of the inlet and outlet ports can be varied as long as a transverse flow across the furnace shaft is provided.
  • a thrust generator 4 is connected over a supply duct to the inlet port 6.
  • the thrust generator 4 may, for instance, be a variable output fan positioned within a intake line 22 for drawing in ambient air.
  • An exhaust conduit 8 is connected to the outlet port 9 at one end and its other end is connected to a dust separator 13 equipped with a suction device 7'.
  • the suction device has a variable output.
  • a safety burner and/or a gas processing chamber 19 shown in dashed lines, can be connected into the exhaust conduit 8.
  • the gas processing chamber 19 may be a gas tank or a combustion chamber.
  • the top distributor described above operates in the following manner: by means of the thrust generator 4 gas is drawn by suction out of the gas exhaust line 12 or ambient air is drawn in through the line 22, the gas is compressed and passed to the inlet port 6 through the line 5 and the degree of purity of the gas used is not important.
  • the gas from the inlet port 6 is directed transversely across the shaft furnace perpendicularly of the upward flow of gas through the furnace and is withdrawn through the outlet port 9 into the exhaust conduit 8 by means of the suction device 7.
  • the transverse gas flow 11 forms a pneumatically operated top distributor.
  • the present invention it is possible to provide a top distributor which does not require any movable components and which, even during charging operations, can guarantee a practically hermetically sealed furnace throat which does not impede the charging operation.
  • Existing cupola furnaces can be outfitted with the device according to the present invention and existing charging devices arranged either at the circumference or on the cover of the furnace throat can be used with the device.
  • Top distributor for a shaft furnace in particular a cupola furnace, comprising furnace walls forming an upwardly extending shaft having a lower portion arranged to contain a charge and an upper portion located above the charge, said upper portion forming a charging aperture, wherein the improvement comprises a gas inlet port formed in one side of said upper portion, a gas outlet port formed in said upper portion on the opposite side thereof from said inlet port and in alignment with said inlet port, a thrust generator located exteriorly of said shaft, a duct connected to said generator and said inlet port for supplying a flow of gas to said inlet port, a suction device located exteriorly of said shaft, a pipe connected between said outlet port and said suction device so that the flow of gas directed into said shaft from said inlet port traverses said shaft perpendicularly to the gas rising in the shaft and flows outwardly through said outlet port, and the crosssectional area of said inlet port at its connection to said shaft is smaller than the cross-sectional area of said outlet port at its connection to said shaft.
  • Top distributor for a shaft furnace as set forth in claim 1, wherein an exhaust conduit for flue gas is connected to said shaft below the connections of said inlet and outlet ports and said thrust generator is connected to said exhaust conduit for withdrawing flue gas from said exhaust conduit, compressing the flue gas and delivering it to said inlet port.
  • Top distributor for a shaft furnace as set forth in claim 2, wherein a gas processing chamber is positioned in said exhaust gas conduit upstream from the connection of said thrust generator to said exhaust conduit so that unpurified gases flow to said thrust generator from said exhaust gas conduit.
  • Top distributor for a shaft furnace as set forth in claim 2, wherein a gas cooler and filter are located in said exhaust gas conduit upstream from the connection of said thrust generator to said exhaust gas conduit so that purified gases flow to said thrust generator from said exhaust gas conduit.
  • Top distributor for a shaft furnace as set forth in claim 2, wherein an inlet line is connected at one end to said thrust generator and at its other end is open to the atmosphere for supplying ambient air to said inlet port.
  • Top distributor for a shaft furnace as set forth in claim 2, wherein an exhaust conduit for flue gas is connected to said shaft below the connection of said outlet port and said suction device is connected to said exhaust conduit for directing the gas received from said outlet port into said exhaust conduit.
  • Top distributor for a shaft furnace as set forth in claim 1, wherein a dust separator is connected to said pipe connecting said outlet port to said suction device.
  • Top distributor for a shaft furnace as set forth in claim 1, wherein a safety burner is connected to said pipe connecting said outlet port to said suction device.
  • Top distributor for a shaft furnace in particular a cupola furnace, comprising furnace walls forming an upwardly extending shaft having a lower portion arranged .to contain a charge and an upper portion located above the charge, said upper portion forming a charging aperture, wherein the improvement comprises a gas inlet port formed in one side of said upper portion, a gas outlet port formed in said upper portion on the opposite side thereof from said inlet port and in alignment with said inlet port, a thrust generator located exteriorly of said shaft, a duct connected to said generator and said inlet port for supplying a flow of gas to said inlet port, a suction device located exteriorly of said shaft, a pipe connected between said outlet port and said suction device so that the flow of gas directed into said shaft fromsaid inlet port traverses said shaft perpendicularly to the gas rising in the shaft and flows outwardly through said outlet port, and said inlet port and said outlet port each project outwardly from said shaft and each has a funnel-shaped configuration with the wider portion thereof connected to said shaft and the
  • Top distributor for a shaft furnace as set forth in claim 9, wherein the funnel-shaped said inlet and outlet ports each have a slot-like configuration at its point of connection to said shaft and the slot-like configuration is elongated in the direction extending transversely of the axial direction of said shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)
US00384411A 1972-08-11 1973-08-01 Furnace-top distributor for shaft furnaces Expired - Lifetime US3843104A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1190972A CH541784A (de) 1972-08-11 1972-08-11 Gichtverschluss für Schachtöfen

Publications (1)

Publication Number Publication Date
US3843104A true US3843104A (en) 1974-10-22

Family

ID=4378075

Family Applications (1)

Application Number Title Priority Date Filing Date
US00384411A Expired - Lifetime US3843104A (en) 1972-08-11 1973-08-01 Furnace-top distributor for shaft furnaces

Country Status (18)

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US (1) US3843104A (pl)
JP (1) JPS5121924B2 (pl)
AT (1) AT344219B (pl)
BE (1) BE803481A (pl)
CA (1) CA1004460A (pl)
CH (1) CH541784A (pl)
CS (1) CS186776B2 (pl)
DD (1) DD105304A5 (pl)
DK (1) DK131061B (pl)
FI (1) FI54198C (pl)
FR (1) FR2196062A5 (pl)
GB (1) GB1437439A (pl)
IT (1) IT993673B (pl)
PL (1) PL87753B1 (pl)
RO (1) RO65610A (pl)
SE (1) SE400117B (pl)
SU (1) SU645619A3 (pl)
ZA (1) ZA735048B (pl)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2659281A1 (de) * 1976-12-29 1978-07-06 Wikotool Syst Tech Maschbau Stufenlos verstellbarer stossdaempfer
FR2801321A1 (fr) * 1999-11-23 2001-05-25 Bernard Audant Cubilot a aspiration du comburant et procede de conduite d'un tel cubilot
CN102997648A (zh) * 2011-09-19 2013-03-27 盐城工学院 冲天炉砂粒除尘装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54152800U (pl) * 1978-04-17 1979-10-24
JPS55181266U (pl) * 1979-06-15 1980-12-26
DE3004502A1 (de) * 1980-02-07 1981-08-13 Krupp-Koppers Gmbh, 4300 Essen Kuehler fuer die koks-trockenkuehlung
CA1298585C (en) * 1986-05-01 1992-04-07 Jeffrey C. Johnson Low velocity air seal
AT385114B (de) * 1986-05-22 1988-02-25 Voest Alpine Ag Abblasvorrichtung fuer einen schachtofen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2659281A1 (de) * 1976-12-29 1978-07-06 Wikotool Syst Tech Maschbau Stufenlos verstellbarer stossdaempfer
FR2801321A1 (fr) * 1999-11-23 2001-05-25 Bernard Audant Cubilot a aspiration du comburant et procede de conduite d'un tel cubilot
WO2001038588A1 (fr) * 1999-11-23 2001-05-31 Bernard Audant Cubilot a aspiration du comburant et procede de conduite d'un tel cubilot
CN102997648A (zh) * 2011-09-19 2013-03-27 盐城工学院 冲天炉砂粒除尘装置

Also Published As

Publication number Publication date
DD105304A5 (pl) 1974-04-12
DK131061C (pl) 1975-10-20
RO65610A (ro) 1980-01-15
DE2331939A1 (de) 1974-02-21
FI54198B (fi) 1978-06-30
DE2331939B2 (de) 1975-06-26
SE400117B (sv) 1978-03-13
CH541784A (de) 1973-09-15
BE803481A (fr) 1973-12-03
CS186776B2 (en) 1978-12-29
AU5847373A (en) 1975-01-30
IT993673B (it) 1975-09-30
SU645619A3 (ru) 1979-01-30
ATA680673A (de) 1977-11-15
ZA735048B (en) 1974-06-26
CA1004460A (en) 1977-02-01
FI54198C (fi) 1978-10-10
FR2196062A5 (pl) 1974-03-08
PL87753B1 (pl) 1976-07-31
JPS4945803A (pl) 1974-05-01
AT344219B (de) 1978-07-10
GB1437439A (en) 1976-05-26
JPS5121924B2 (pl) 1976-07-06
DK131061B (da) 1975-05-20

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