JP4882449B2 - Dust removal method and apparatus for converter exhaust gas treatment facility - Google Patents

Dust removal method and apparatus for converter exhaust gas treatment facility Download PDF

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JP4882449B2
JP4882449B2 JP2006091222A JP2006091222A JP4882449B2 JP 4882449 B2 JP4882449 B2 JP 4882449B2 JP 2006091222 A JP2006091222 A JP 2006091222A JP 2006091222 A JP2006091222 A JP 2006091222A JP 4882449 B2 JP4882449 B2 JP 4882449B2
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converter
seal
gas
dust removal
skirt
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JP2007262525A (en
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宏之 山本
一晴 佐野
龍介 輪湖
英治 林田
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JFE Steel Corp
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JFE Steel Corp
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    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Description

本発明は、転炉排ガス処理設備におけるスカートシールジャケット部に堆積するダスト除去技術に関するものである。   The present invention relates to a technique for removing dust deposited on a skirt seal jacket portion in a converter exhaust gas treatment facility.

転炉の排ガス処理設備には、転炉の傾動を可能とするために、転炉炉口とフードとの間に上下動可能なスカートが設けられている。又、転炉から発生するCOガスは、その混合比によっては空気との反応により爆発する場合もあるので、スカートによって完全に密閉する必要があり、スカートシール部が設けられている。   The converter exhaust gas treatment facility is provided with a skirt capable of moving up and down between the converter furnace opening and the hood in order to allow the converter to tilt. In addition, since the CO gas generated from the converter may explode due to reaction with air depending on the mixing ratio, it must be completely sealed with a skirt, and a skirt seal portion is provided.

一般的にこのスカートシール部は、スカートの周りに断面Ｕ型の溝を設け、この環状の溝内に水を満たし、フードに設けた仕切り筒を上下動可能にその下端を水中に漬けて水封している。転炉から発生するガス中には、微細な鉄粉を含んだダストが大量に含まれているため、吹錬中に排ガスによって吹き上げられたダストがこのスカートシール部の水封部である環状溝に入り、次第に環状溝の底部にダストが堆積し、やがて仕切り筒の下端が堆積したダストに当たるようになって、スカートの上下動が不能となり、転炉操業を停止するという事態が生じる。   In general, this skirt seal portion is provided with a U-shaped groove around the skirt, filled with water in the annular groove, and the lower end of the partition tube provided in the hood can be moved up and down to be immersed in water. Sealed. Since the gas generated from the converter contains a large amount of dust containing fine iron powder, the dust blown up by the exhaust gas during blowing is an annular groove that forms the water seal of this skirt seal. The dust gradually accumulates at the bottom of the annular groove, and eventually the lower end of the partition tube comes into contact with the accumulated dust, so that the vertical movement of the skirt becomes impossible and the converter operation is stopped.

このような事態を解決するために、特許文献１には、環状溝の外側壁底部に設けた交換水噴出ノズルから交換水を内側壁に向けほぼ直角に噴出し沈降ダストを流動させて排出する方法および環状壁の接線方向に交換水を噴出して環状溝内に回転流を生成することによって環状溝内の沈降ダストの流動特性を向上させて排出する方法が開示されている。これらいずれの方法においても、交換水噴出ノズルから噴出する交換水により環状溝内のシール水を流動させ、環状溝をオーバフローする交換水によって比重の小さいダストを外部に排出させ、比重の大きいダストについては下部の交換水排出管より排出するようにしている。
特開昭５９−２２９４０９号公報 In order to solve such a situation, Patent Document 1 discloses that exchange water is ejected from an exchange water ejection nozzle provided at the bottom of the outer wall of the annular groove to the inner wall at a substantially right angle, and the settled dust is caused to flow and be discharged. There is disclosed a method and a method for improving the flow characteristics of settled dust in the annular groove and discharging it by jetting exchange water in the tangential direction of the annular wall to generate a rotating flow in the annular groove. In any of these methods, the seal water in the annular groove is caused to flow by the exchange water ejected from the exchange water ejection nozzle, and the dust having a small specific gravity is discharged to the outside by the exchange water overflowing the annular groove. Is discharged from the lower replacement water discharge pipe.
JP 59-229409 A

しかしながら、特許文献１に開示された、交換水噴出ノズルから内側壁に向けほぼ直角に噴出する方法では、環状溝内に沈降したダストの搬送機能が低いため、大流量の交換水が必要になるばかりでなく、次第に環状溝内の底部にダストが堆積し、スカートの上下動が不能になるトラブルが発生する。このため、定期的に環状溝内からダストを除去する作業が必要になり、転炉の稼働率が低下するという問題があった。   However, in the method disclosed in Patent Document 1 that ejects from the replacement water ejection nozzle to the inner wall at a substantially right angle, the function of transferring dust settled in the annular groove is low, so a large flow rate of replacement water is required. In addition, the dust gradually accumulates at the bottom of the annular groove, causing a problem that the skirt cannot move up and down. For this reason, the operation | work which removes dust regularly from the inside of an annular groove is needed, and there existed a problem that the operation rate of a converter fell.

第一の発明は、転炉スカートジャケット内のシール水に円周方向のガスの旋回流を形成させる方向へガスを吹き込むことを特徴とする転炉スカートシールジャケットのダスト除去方法である。 1st invention is the dust removal method of the converter skirt seal jacket characterized by blowing gas in the direction which forms the swirling flow of the gas of the circumferential direction in the seal water in a converter skirt jacket.

第二の発明は、ガスの吐出ノズルを複数のユニットとし、該ユニットをシールジャケット内で円周方向に複数に分割した状態でガス吐出させることを特徴とする第一の発明に記載の転炉スカートシールジャケットのダスト除去方法である。   According to a second aspect of the present invention, there is provided a converter according to the first aspect, wherein the gas discharge nozzle is a plurality of units, and gas is discharged in a state where the unit is divided into a plurality of portions in the circumferential direction within the seal jacket. A dust removal method for a skirt seal jacket.

第三の発明は、転炉スカートシールジャケット内のシール水に円周方向のガスの旋回流を発生させるべくガスの吐出ノズルが前記転炉スカートシールジャケットの壁面に対して角度を持たせて配置されていることを特徴とする転炉スカートシールジャケットのダスト除去装置である。 According to a third aspect of the present invention, a gas discharge nozzle is disposed at an angle with respect to the wall surface of the converter skirt seal jacket so as to generate a circumferential gas swirl flow in the seal water in the converter skirt seal jacket. This is a dust removing device for a converter skirt seal jacket.

第四の発明は、複数の吐出ノズルが円周方向に少なくとも3分割のユニットで配置されていることを特徴とする第三の発明に記載の転炉スカートシールジャケットのダスト除去装置である。   A fourth invention is the dust removal device for a converter skirt seal jacket according to the third invention, wherein the plurality of discharge nozzles are arranged in at least three divided units in the circumferential direction.

本発明により、転炉スカートシールジャケット内のダストはガスの旋回流により遠心力との相乗効果により確実に除去できる。   According to the present invention, the dust in the converter skirt seal jacket can be reliably removed by the synergistic effect with the centrifugal force by the swirling flow of gas.

また、ガス吐出ノズルは円周方向に吐出口が向いているので旋回流が発生し、かつガス吐出ノズルは複数の分割ユニットで配置されているので、ジャケット内でのダストの残留による偏析が生じない効果がある。   Also, since the gas discharge nozzle faces the discharge port in the circumferential direction, a swirling flow is generated, and the gas discharge nozzle is arranged in a plurality of divided units, so that segregation due to dust remaining in the jacket occurs. There is no effect.

以上により、ダストの堆積除去のため従来360万トン精錬ベースで、月当り2回の除去作業が1回の回数となり、転炉操業停止等の不測の事態を防止できる。   As a result of the above, it is possible to prevent unforeseen circumstances such as the converter operation stoppage, etc., with the removal work of 2 times per month on the basis of refining 3.6 million tons for dust accumulation removal.

図１は、本発明の転炉スカートシールジャケットのダスト除去装置の側断面図である。
図１において、１は転炉、２はスカートであり、該スカート２の下端は転炉１の炉口の形状に合わせて形成されている。３はフードで、吹錬中に発生するCOガス等を回収するため図示しない回収用ダクトに接続されている。 FIG. 1 is a side sectional view of a dust removing device for a converter skirt seal jacket according to the present invention.
In FIG. 1, 1 is a converter, 2 is a skirt, and the lower end of the skirt 2 is formed in accordance with the shape of the furnace port of the converter 1. A hood 3 is connected to a recovery duct (not shown) for recovering CO gas and the like generated during blowing.

４は水封部で、該水封部４は、スカート２の周囲を断面がU形状の溝５を形成した状態で配置されており、該溝５内にシール水が充填されている。前記溝５を有する水封部４は床６から懸架されたシリンダー機構7によりブラケット８、台９を介して上下動可能に支持されている。   Reference numeral 4 denotes a water seal portion, and the water seal portion 4 is arranged around the skirt 2 in a state in which a groove 5 having a U-shaped cross section is formed, and the groove 5 is filled with seal water. The water seal portion 4 having the groove 5 is supported by a cylinder mechanism 7 suspended from a floor 6 through a bracket 8 and a base 9 so as to be vertically movable.

１０は前記床６から環状に垂設されたシール筒で、転炉操業中はその下端が水封部4内のシール水内に埋没して転炉排ガスの大気との遮断を図り、密封状態が形成される。
転炉への高炉からの溶銑の投入および精錬後の溶鋼の排出の傾動状態では、前記シリンダー機構７の作動によりスカート２、水封部４は上方に移動する。
１１はN２等のガス吐出ノズルで、前記水封部４の下部に向け設けられている。 10 is a seal cylinder suspended from the floor 6 in an annular shape, and its lower end is buried in the seal water in the water sealing part 4 during the converter operation so as to cut off the converter exhaust gas from the atmosphere and sealed. Is formed.
In the tilted state of molten iron from the blast furnace to the converter and the discharge of molten steel after refining, the skirt 2 and the water seal 4 move upward by the operation of the cylinder mechanism 7.
Reference numeral 11 denotes a gas discharge nozzle such as N2, which is provided toward the lower portion of the water seal 4.

本発明はこのガス吐出ノズル１１の配置に特徴を有するもので、詳細を図2により説明する。
図2は、ガス吐出ノズル１１の配置状態を示す図1のA−A線断面図である。 The present invention is characterized by the arrangement of the gas discharge nozzles 11 and will be described in detail with reference to FIG.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.

図2において、１２，１３、１４は複数のガス吐出ノズル１１をユニットで取付けたヘッダー管で各々ガス供給口１２a,13a,14aが設けられている。前記ガス吐出ノズル１１は水封部４の溝５下部において、溝５の円周方向にガス旋回流が発生する向きに溝５内に配置されている。尚４aはダストを含む水、N2ガスの排出口である。   In FIG. 2, numerals 12, 13, and 14 are header pipes each having a plurality of gas discharge nozzles 11 attached as a unit, and are provided with gas supply ports 12a, 13a, and 14a, respectively. The gas discharge nozzle 11 is disposed in the groove 5 at a lower portion of the groove 5 of the water seal portion 4 in a direction in which a gas swirl flow is generated in the circumferential direction of the groove 5. Incidentally, 4a is an outlet for dust-containing water and N2 gas.

溝５内のダストの除去にあたっては、ガス吐出ノズル１１の前記の配置により、水封部４の溝5内で激しい円周方向の旋回流が発生し、堆積したダストが確実に外部へ排出されることになる。   When removing the dust in the groove 5, due to the arrangement of the gas discharge nozzle 11, a severe circumferential swirling flow is generated in the groove 5 of the water seal 4 and the accumulated dust is reliably discharged to the outside. Will be.

転炉操業における排ガスの回収を支障なく行えるようになり、製鋼効率を大幅に向上させることが可能となった。   The exhaust gas can be recovered without any problem in the converter operation, and the steelmaking efficiency can be greatly improved.

転炉スカートシールジャケットのダスト除去装置を説明する側断面図である。It is a sectional side view explaining the dust removal apparatus of a converter skirt seal jacket. 図１のA―A矢視断面図である。FIG. 2 is a cross-sectional view taken along line AA in FIG.

符号の説明Explanation of symbols

１ 転炉
２ スカート
３ フード
４ 水封部
５ 溝
６ 床
７ シリンダー機構
８ ブラケット
９ 台
１０ シール筒
１１ ガス吐出ノズル
１２ ヘッダー管
１２aガス供給口
１３ ヘッダー管
１３aガス供給口
１４ ヘッダー管
１４aガス供給口 DESCRIPTION OF SYMBOLS 1 Converter 2 Skirt 3 Hood 4 Water seal part 5 Groove 6 Floor 7 Cylinder mechanism 8 Bracket 9 units 10 Seal cylinder 11 Gas discharge nozzle 12 Header pipe 12a Gas supply port 13 Header pipe 13a Gas supply port 14 Header pipe 14a Gas supply port

Claims (4)

転炉スカートジャケット内のシール水に円周方向のガスの旋回流を形成させる方向へガスを吹き込むことを特徴とする転炉スカートシールジャケットのダスト除去方法。 A dust removal method for a converter skirt seal jacket, characterized in that gas is blown in a direction in which a circumferential gas swirl flow is formed in the seal water in the converter skirt jacket. ガスの吐出ノズルを複数のユニットとし、該ユニットをシールジャケット内で円周方向に複数に分割した状態でガス吐出させることを特徴とする請求項１に記載の転炉スカートシールジャケットのダスト除去方法。   2. The dust removal method for a converter skirt seal jacket according to claim 1, wherein gas discharge nozzles are made into a plurality of units, and gas is discharged in a state where the units are divided into a plurality in the circumferential direction in the seal jacket. . 転炉スカートシールジャケット内のシール水に円周方向のガスの旋回流を発生させるべくガスの吐出ノズルが前記転炉スカートシールジャケットの壁面に対して角度を持たせて配置されていることを特徴とする転炉スカートシールジャケットのダスト除去装置。 A gas discharge nozzle is disposed at an angle with respect to the wall surface of the converter skirt seal jacket so as to generate a circumferential gas swirl flow in the seal water in the converter skirt seal jacket. Dust removal device for converter skirt seal jacket. 複数の吐出ノズルが円周方向に少なくとも３分割のユニットで配置されていることを特徴とする請求項３に記載の転炉スカートシールジャケットのダスト除去装置。   4. The dust removal device for a converter skirt seal jacket according to claim 3, wherein the plurality of discharge nozzles are arranged in at least three divided units in the circumferential direction.
JP2006091222A 2006-03-29 2006-03-29 Dust removal method and apparatus for converter exhaust gas treatment facility Expired - Fee Related JP4882449B2 (en)

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Cited By (1)

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CN103028579A (en) * 2012-07-20 2013-04-10 宝钢集团新疆八一钢铁有限公司 Method for cleaning and dust removal of large-scale blast furnace bustle pipe by devices

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JP5907000B2 (en) * 2012-08-27 2016-04-20 新日鐵住金株式会社 Dust removal method for converter skirt seal
JP6213298B2 (en) * 2014-02-24 2017-10-18 新日鐵住金株式会社 Dust removal method for converter skirt seal
CN112004946A (en) 2018-07-25 2020-11-27 日本制铁株式会社 Converter exhaust gas treatment device
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JPS59229409A (en) * 1983-06-08 1984-12-22 Kawasaki Heavy Ind Ltd Method and device for removing dust in skirt sealing part in installation for treating waste gas of converter
JPH10251732A (en) * 1997-03-18 1998-09-22 Kawasaki Steel Corp Device for removing dust at skirt seal part in converter exhaust gas treating equipment
JP3711748B2 (en) * 1997-05-26 2005-11-02 Ｊｆｅスチール株式会社 Dust removal equipment for converter exhaust gas treatment equipment
JP2004016127A (en) * 2002-06-18 2004-01-22 Pai Corporation:Kk Method for cultivating black soybean

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103028579A (en) * 2012-07-20 2013-04-10 宝钢集团新疆八一钢铁有限公司 Method for cleaning and dust removal of large-scale blast furnace bustle pipe by devices
CN103028579B (en) * 2012-07-20 2014-09-10 宝钢集团新疆八一钢铁有限公司 Method for cleaning and dust removal of large-scale blast furnace bustle pipe by devices

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