EP1149177B1 - Entstaubungsanlage für hochofengas - Google Patents

Entstaubungsanlage für hochofengas Download PDF

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Publication number
EP1149177B1
EP1149177B1 EP00902572A EP00902572A EP1149177B1 EP 1149177 B1 EP1149177 B1 EP 1149177B1 EP 00902572 A EP00902572 A EP 00902572A EP 00902572 A EP00902572 A EP 00902572A EP 1149177 B1 EP1149177 B1 EP 1149177B1
Authority
EP
European Patent Office
Prior art keywords
pressure vessel
blast furnace
dust
dust extraction
installation according
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
EP00902572A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1149177A1 (de
Inventor
Karl-Rudolf Hegemann
Paul Goedert
Emile Lonardi
Ken Edward
Francis Pott
Guy Thillen
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
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP1149177A1 publication Critical patent/EP1149177A1/de
Application granted granted Critical
Publication of EP1149177B1 publication Critical patent/EP1149177B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • B04C5/06—Axial inlets
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/22—Dust arresters

Definitions

  • the present invention relates to a dedusting system for blast furnace gas.
  • Dust extraction systems for blast furnace gas generally include a pre-cleaning stage and a fine cleaning stage.
  • the pre-cleaning stage is done by formed a so-called dust bag.
  • the latter essentially exists from a large, vertical pressure vessel, which is connected to a gas pipe large cross-section is connected to the blast furnace gout. From the gas line the gas enters the pressure vessel vertically, increasing the cross-section, when the gas enters the pressure vessel, a causes a significant reduction in its flow rate. hereby at least the coarsest particles drop vertically out of the gas stream before this after a change of direction at the upper end of the pressure vessel Dust bag leaves.
  • the separated ones are Particles caught in a dust bunker, from which they pass through a Lock device be removed. That gets out of the dust bag roughly pre-cleaned blast furnace gas then in the fine cleaning, which normally comprises at least one gas scrubber or electrostatic precipitator.
  • Such Cyclone system comprises one or more cyclones connected in parallel.
  • Latter are pressure vessels into which the blast furnace gas is tangential at high speed is initiated, causing it to swirl. In doing so the particles are thrown against the outer wall of the cyclone by centrifugal force and slide down this dust wall into a dust bunker. It Needless to say that such a two-stage pre-cleaning Dedusting system significantly more expensive and a complex gas-side Piping required for the connection of the cyclones connected in parallel.
  • a dedusting plant for blast furnace gas has also already been built, in which the dust bag is replaced by a single large cyclone (Dust extraction system of blast furnace N ° 2 in the company's Schwelgen plant THYSSEN Krupp Stahl A.G.).
  • the main blast furnace gas line coming from the blast furnace is inserted tangentially into the cyclone container, which means that Blast furnace gas is swirled, causing dust separation as already described above. So far has such a large cyclone However, it does not in any way displace the well-known dust bag from the market can, although there has long been a need for more effective pre-cleaning of the blast furnace gas.
  • the present invention is therefore based on the object of a dedusting system for blast furnace gas with a pre-purification level that has a high degree of separation, but nevertheless those mentioned above Disadvantages of the known solution with a large cyclone as a pre-cleaning stage not or only in a weakened form.
  • Such a dedusting system comprises in known A pre-cleaning stage and a fine cleaning stage.
  • the pre-cleaning stage is formed by a large cyclone, the one standing vertically Pressure vessel comprises, in which a top gas line coming from the blast furnace opens.
  • axial introduction device for the blast furnace gas is provided, to which the from Blast furnace coming top gas line can be connected from above.
  • This axial The introduction device is designed in such a way that it blows the blast furnace gas in the axial direction Directs in the pressure vessel.
  • a swirl device with guide vanes is arranged below the introduction device.
  • the dedusting system according to the invention thus also has the Advantage that changes to the guide vanes in the swirl device, i.e. with reasonable effort, the separation characteristics of the system at all times can be adapted to new requirements.
  • the pre-cleaned blast furnace gas could e.g. at the bottom of the cyclone can be removed through a central outlet nozzle. Because in most Blast furnace gas falls from above into the subsequent fine cleaning stage occurs, however, it is advantageous to use the pre-cleaned blast furnace gas on upper end of the pressure vessel through a central outlet port remove.
  • the introduction device advantageously has at least two upward-facing inlet ports that surround the central one Open the outlet connection in the pressure vessel. The more inlet port the Has inlet device, the more homogeneous is the flow of course Swirl device in the pressure vessel.
  • the introduction device advantageously has a outside of the pressure vessel Distributor on. The latter includes one oriented vertically upwards Connection piece, as well as downward pipe branches.
  • the ones from Blast furnace coming blast furnace gas line is here at the central connecting piece, and the inlet nozzle of the introducer are on the pipe branches connected.
  • the fine cleaning stage can therefore be the between two adjacent pipe branches of the Distributor is passed through to the central outlet port of the pressure vessel be connected.
  • the distributor is preferably axially symmetrical educated.
  • the introduction device advantageously has a conical, flaring inlet bell opening from the central outlet port is crossed. Between the bottom of the inlet bell and the Wall of the pressure vessel is formed by an annular gap by the swirl device is housed.
  • This inlet bell is advantageous from the central one Exhaust port worn so that the pressure vessel and inlet bell are independent can expand from each other.
  • each of the guide blades has at its outer end each have a mounting plate that sealed on a flange that corresponds to the corresponding Slit framed in the wall of the pressure vessel.
  • the inner end of one The guide vane can be inserted into a slot-shaped depression in the lower edge of the Inlet bell may be introduced to the gas flow at the swirl device flows past to keep it as small as possible.
  • the pre-cleaning stage shown in Figures 1 and 2 of an inventive A dust collector for blast furnace gas is operated by a large cyclone formed, which is designated globally by the reference numeral 10. That too Cleaning blast furnace gas is the pre-cleaning stage via a top gas line 12 supplied, which comes directly from the blast furnace (not shown).
  • the large cyclone 10 comprises a vertical, cylindrical one Pressure vessel 14.
  • the lower end of the pressure vessel 14 forms a dust bunker 16, which empties in a known manner via a lock unit 18 can be.
  • Figure 2 e.g. the emptying of the lock unit 18 via a chute 20 indicated in a railroad car 22.
  • FIGS Cut The upper end of the pressure vessel 14 is shown in FIGS Cut shown. It is sealed gas-tight by a dome hood 24. How seen from Figure 2, this dome 24 has two peripheral inlet connection 26, 28, which are symmetrical to the central axis 30 of the pressure vessel 14 are arranged. The angle ⁇ between the central axis 30 of the pressure vessel 14 and the central axis 32 of an inlet connector 26 is approximately 30 °.
  • Reference numeral 34 in FIG. 1 shows an axially symmetrical distributor 34 (the axis of symmetry of the distributor is axis 30).
  • This Manifold 34 is in the form of a downpipe. It has two downward facing Pipe branches 36, 38 with which he connects to the two inlet ports 26, 28 of the dome hood 24 is connected, and a vertically after connecting piece 40 aligned above. The latter is via a compensator 42 and possibly a shut-off device 44, connected to the top gas line 12.
  • the top gas line 12 is perpendicular an upper support structure 46, which in turn is perpendicular to one supports the lower support frame 48, which carries the large cyclone 10, or on his supports the upper end laterally. However, it is not excluded the top gas line 12 supported directly vertically on the pressure vessel 14.
  • the blast furnace gas is essentially via the connecting piece 26, 28 introduces axially into the pressure vessel 14.
  • it hits one down conically expanding inlet bell 50, which is so centered in the pressure vessel 14 is arranged that between the lower edge 52 of the inlet bell 50 and an annular gap 56 is formed in the wall 54 of the pressure vessel.
  • An annular swirl device 56 is arranged, the structure of which is further below is described.
  • the swirl device 58 displaces that which is introduced axially into the annular gap 56 Blast furnace gas in a swirl movement about the axis 30 of the pressure vessel 14.
  • the particles in the blast furnace gas are transferred to the cylindrical by centrifugal force Outer wall 54 of the pressure vessel 14 hurled and slip this outer wall 54 down.
  • the gas flow is at a lower deflection bell 59 again deflected upwards, where it is below the inlet bell 50 in a central outlet nozzle 60 opens out, the coaxial to the central axis 30 of the Pressure vessel is arranged.
  • the inlet bell 50 is from the central Exhaust pipe 60 crosses gas-tight and is also exclusively from this Socks worn.
  • the dome hood 24 is also from the central outlet port 60 gas-tight crosses, the latter gas-tight but at the same time axially displaceable through a pipe socket 62 installed in the dome hood 24 is guided so that the outlet port 60 is free relative to the dome hood 24 can expand (see Figure 2).
  • the central outlet connection 60 above the dome hood to a gas line 64 connected, which is the pre-cleaned blast furnace gas to the fine cleaning stage (not shown). This is the gas line 64 coming from the side performed between the two pipe branches 36, 38 of the distributor 34.
  • the swirl device 58 includes a plurality (i.e., e.g. 30) vanes 66 which e.g. a coverage of approximately 20 to 40% and an angle of attack ⁇ of 15 to Have 30 °.
  • Each of the guide vanes 66 is from the outside through a slot 68 inserted into the swirl device 58 in the wall 54 of the pressure vessel 14. These slots 68 are all one on the outside of wall 54 Bordered frame 70 which carries a flange 72.
  • Guide vanes 66 include in turn each have an airfoil 74 that is flat or curved can be, as well as a mounting plate 76 which is gastight on the flange 72 is screwed on.
  • the airfoil 74 is cantilevered from the mounting plate 76 into the pressure vessel 14.
  • the inner end of a each blade 74 with play on all sides in a slot-shaped depression 78 a wear lining 79 of the lower edge 52 of the inlet bell 50 be introduced.
  • the blades 74, the Wall 54, the inlet bell 50, the deflection bell 59, and all other parts exposed in cyclone 10 to severe abrasion from the blast furnace dust are, of course, with a wear lining 79, consisting e.g. made of a ceramic material.
  • a great advantage of the swirl device 58 is that the guide vanes 66 can be replaced individually from the outside. You can, in fact, from an outer stage 80, simply pulled out of the pressure vessel 14, or pushed into the pressure vessel 14. Guide bars 82 on the airfoil 74 facilitate the mounting of the guide vanes 66, by centering the airfoil 74 in the frame 70.
  • Guide bars 82 on the airfoil 74 facilitate the mounting of the guide vanes 66, by centering the airfoil 74 in the frame 70.
  • a blast furnace operator the zinc or lead content in the dust from the pre-cleaning stage want to reduce have the Drali device 58 redesigned in such a way that the cyclone has a lower separation limit of about 16 ⁇ m grain size having.
  • the dedusting system presented opens up to the blast furnace operator thus new possibilities to optimize the dedusting of the blast furnace gases.
  • the large cyclone 10 ' which is essentially is identical to the large cyclone 10 of Figures 1 to 4, is axially in the decapitated pressure vessel 102 of the dust bag 100 used, from which all Internals were removed in advance. Only the head end 104 of the Large cyclones 10 'protrude from the pressure vessel 102. It is at the top Edge of the decapitated pressure vessel 102 by means of a gas-tight connection 106 connected.
  • the lower part of the large cyclone 10 ' protrudes axially into the pressure vessel 102 and has an opening at its foot end 108 in a dust bunker 116. The latter is through the dust bunker of the old dust bags 100 trained.
  • the support structure 110 for the of the Blast furnace gas coming blast furnace gas line 112 is supported on the pressure vessel 102 of the dust bag 100.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Blast Furnaces (AREA)
  • Cyclones (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
EP00902572A 1999-01-08 2000-01-07 Entstaubungsanlage für hochofengas Expired - Lifetime EP1149177B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
LU90337A LU90337B1 (de) 1999-01-08 1999-01-08 Entstaubungsanlage fuer Hochofengas
LU90337 1999-01-08
PCT/EP2000/000087 WO2000040763A1 (de) 1999-01-08 2000-01-07 Entstaubungsanlage für hochofengas

Publications (2)

Publication Number Publication Date
EP1149177A1 EP1149177A1 (de) 2001-10-31
EP1149177B1 true EP1149177B1 (de) 2002-09-04

Family

ID=19731794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00902572A Expired - Lifetime EP1149177B1 (de) 1999-01-08 2000-01-07 Entstaubungsanlage für hochofengas

Country Status (14)

Country Link
US (1) US6610115B1 (zh)
EP (1) EP1149177B1 (zh)
JP (1) JP4227733B2 (zh)
KR (1) KR100649786B1 (zh)
CN (1) CN1205343C (zh)
AR (1) AR022191A1 (zh)
AT (1) ATE223500T1 (zh)
AU (1) AU2435900A (zh)
BR (1) BR0007246B1 (zh)
CA (1) CA2350725C (zh)
DE (1) DE50000446D1 (zh)
LU (1) LU90337B1 (zh)
TW (1) TW473548B (zh)
WO (1) WO2000040763A1 (zh)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007000242A1 (en) * 2005-06-29 2007-01-04 Danieli Corus Technical Services Bv Cyclone separator for blast furnace gas
CN101121154B (zh) * 2006-08-09 2010-07-07 唐忠库 高效防磨筒式旋风除尘器
EP2031078A1 (en) * 2007-08-29 2009-03-04 Paul Wurth S.A. Dust catcher for blast furnace gas
CA2701799A1 (en) * 2007-10-18 2009-04-23 Deere & Company Controlled flow air precleaner
JP5308224B2 (ja) * 2009-04-24 2013-10-09 新日鉄住金エンジニアリング株式会社 高炉ガス用ダストキャッチャ
DE202009016437U1 (de) 2009-12-04 2010-03-25 Paul-Wurth Umwelttechnik Gmbh Axialzyklon zur Verwendung als Vorreinigungsstufe in einer Entstaubungsanlage für Hochofengas
GB201106573D0 (en) * 2011-04-19 2011-06-01 Siemens Vai Metals Tech Ltd Cyclone
CN102997648B (zh) * 2011-09-19 2014-10-15 盐城工学院 冲天炉砂粒除尘装置
JP6202555B2 (ja) * 2013-06-05 2017-09-27 株式会社タクマ 循環流動層ボイラの流動媒体回収器
DE102013015052B4 (de) * 2013-09-12 2015-10-15 Mann + Hummel Gmbh Zyklon-Filtereinrichtung
CN103940247B (zh) * 2014-03-26 2016-06-01 上海欧骋冶金成套设备有限公司 一种用于捕集烟尘的升降式顶吸罩
CN106583067A (zh) * 2017-03-13 2017-04-26 北京首钢国际工程技术有限公司 一种内置双螺旋轴向旋风除尘器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US434216A (en) * 1890-08-12 Half to f
FR1306932A (fr) * 1960-11-24 1962-10-19 Metallgesellschaft Ag Couronne à aubes pour dépoussiéreur-cyclone
GB920230A (en) * 1961-02-07 1963-03-06 Coopers Mech Joints Improvements in or relating to cyclones for removing solids from gas
FR1355017A (fr) * 1963-02-01 1964-03-13 Appareil d'épuration primaire des gaz de hauts-fourneaux
US3420040A (en) * 1965-06-22 1969-01-07 Joy Mfg Co Dust collector
US3672502A (en) * 1970-03-27 1972-06-27 Polysius Gmbh Apparatus for purifying dust loaded waste gases
US4420314A (en) * 1977-06-02 1983-12-13 Barron Industries, Inc. Gas-solids separator

Also Published As

Publication number Publication date
CN1327482A (zh) 2001-12-19
WO2000040763A1 (de) 2000-07-13
JP2002534600A (ja) 2002-10-15
AU2435900A (en) 2000-07-24
BR0007246A (pt) 2001-10-30
EP1149177A1 (de) 2001-10-31
KR100649786B1 (ko) 2006-11-24
JP4227733B2 (ja) 2009-02-18
CA2350725C (en) 2008-08-26
CA2350725A1 (en) 2000-07-13
LU90337B1 (de) 2000-07-19
ATE223500T1 (de) 2002-09-15
KR20010101412A (ko) 2001-11-14
BR0007246B1 (pt) 2009-08-11
TW473548B (en) 2002-01-21
US6610115B1 (en) 2003-08-26
AR022191A1 (es) 2002-09-04
DE50000446D1 (de) 2002-10-10
CN1205343C (zh) 2005-06-08

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