JP4654305B2 - Blast furnace blower - Google Patents

Blast furnace blower Download PDF

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JP4654305B2
JP4654305B2 JP2009118864A JP2009118864A JP4654305B2 JP 4654305 B2 JP4654305 B2 JP 4654305B2 JP 2009118864 A JP2009118864 A JP 2009118864A JP 2009118864 A JP2009118864 A JP 2009118864A JP 4654305 B2 JP4654305 B2 JP 4654305B2
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blast furnace
oxygen
furnace blower
protective layer
enriched air
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JP2010265517A (en
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修二 石原
修一郎 小野
幸光 沢井
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Mitsui Engineering and Shipbuilding Co Ltd
Mitsui E&S Holdings Co Ltd
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Mitsui Engineering and Shipbuilding Co Ltd
Mitsui E&S Holdings Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • C21B7/163—Blowpipe assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • 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
    • F27B1/20—Arrangements of devices for charging
    • 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
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/083—Nitrides
    • F05C2203/0839—Nitrides of boron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/14—Self lubricating materials; Solid lubricants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/22—Non-oxide ceramics
    • F05D2300/228—Nitrides
    • F05D2300/2282—Nitrides of boron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/607—Monocrystallinity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/611—Coating

Description

本発明は、酸素富化された空気を高炉に送風する高炉送風機に係り、特にこのような高炉送風機として使用される軸流圧縮機の構造に関するものである。   The present invention relates to a blast furnace blower that blows oxygen-enriched air to a blast furnace, and more particularly to a structure of an axial compressor used as such a blast furnace blower.

高炉に送風される空気は、従来、高炉送風機から吐出される空気に酸素圧縮機から酸素を供給することで作製されていた。しかし、高炉送風機から吐出される空気に酸素を供給すると、高炉送風機の吐出圧力以上に酸素圧縮機から吐出する酸素の圧力を上げる必要があり、エネルギー量の増加とともに安全性に関わるメンテナンスに対して大きな労力を必要としていた。現在、このような問題点を解決するために、高炉送風機が吸入する空気に空気分離装置より酸素を供給し、酸素富化された空気を高炉送風機内で圧縮して吐出側から高炉に送風する方法が採られている。   The air blown to the blast furnace has been conventionally produced by supplying oxygen from an oxygen compressor to the air discharged from the blast furnace blower. However, when oxygen is supplied to the air discharged from the blast furnace blower, it is necessary to increase the pressure of oxygen discharged from the oxygen compressor above the discharge pressure of the blast furnace blower. It required a lot of effort. Currently, in order to solve such problems, oxygen is supplied from the air separation device to the air sucked into the blast furnace blower, and the oxygen-enriched air is compressed in the blast furnace blower and blown from the discharge side to the blast furnace. The method is taken.

ここで、高炉送風機は、酸素富化された空気を高炉に送風するために、ケーシング内で回転するロータに設けられた動翼と、ケーシング内に設けられた静翼とにより、酸素富化された空気を圧縮する必要があるため、それぞれの部材が互いに接近して設置されている。このため、酸素富化率が５％を超える空気に暴露された高炉送風機内では、これら接近した鋼製部材同士の接触による火花などを引き金に発火現象が生じるおそれがあり、酸素富化率が５％を超える空気を高炉に送風することができなかった。このため、酸素富化率が５％を超える空気を安全に高炉に供給する高炉送風機が要求されている。   Here, the blast furnace blower is oxygen-enriched by moving blades provided on a rotor rotating in the casing and stationary blades provided in the casing in order to blow oxygen-enriched air to the blast furnace. Since the air needs to be compressed, the members are installed close to each other. For this reason, in a blast furnace blower exposed to air with an oxygen enrichment rate exceeding 5%, there is a risk of ignition due to sparks caused by contact between these close steel members, and the oxygen enrichment rate is low. Air exceeding 5% could not be blown into the blast furnace. For this reason, a blast furnace blower that safely supplies air having an oxygen enrichment rate exceeding 5% to the blast furnace is required.

ここで、従来、高炉送風機の吸入側と吐出側の両方に酸素供給ラインを備えることで、酸素富化率が５％を超える空気を高炉に供給することが提案されている（特許文献１）。   Here, conventionally, it has been proposed to supply an oxygen enrichment rate exceeding 5% to the blast furnace by providing oxygen supply lines on both the suction side and the discharge side of the blast furnace blower (Patent Document 1). .

特開２００６−２８３０９３号公報JP 2006-283093 A

しかしながら、高炉送風機内の発火現象の要因は解決されておらず、高炉送風機内の空気の酸素富化率を制御する必要がある。   However, the cause of the ignition phenomenon in the blast furnace blower has not been solved, and it is necessary to control the oxygen enrichment rate of the air in the blast furnace blower.

この発明は、このような従来の問題点を解消するためになされたもので、酸素富化された空気中で使用されながらも発火現象を引き起こす要因となる火花の発生を抑制することができる高炉送風機を提供することを目的とする。   The present invention has been made to solve such a conventional problem, and can be used in oxygen-enriched air, but can suppress the generation of sparks that cause ignition phenomena. An object is to provide a blower.

上記目的を達成するために、本発明は、酸素富化した空気を吸入して高炉に送風する高炉送風機であって、前記酸素富化した空気中で使用される鋼製部材と、前記鋼製部材の表面上に形成され、他の部材との接触により自らが削られるアブレイダブル材から成る摩擦保護層とを有することを特徴とする高炉送風機を提供するものである。
ここで、前記アブレイダブル材は、窒化ホウ素を含むことを特徴とすることが好ましい。
また、前記摩擦保護層は、さらに、六方晶系の層状結晶構造から成る潤滑材を含むことが好ましい。 In order to achieve the above object, the present invention provides a blast furnace blower that sucks oxygen-enriched air and blows it into a blast furnace, the steel member used in the oxygen-enriched air, and the steel The present invention provides a blast furnace blower characterized by having a friction protective layer made of an abradable material formed on the surface of a member and scraped by contact with another member .
Here, it is preferable that the abradable material contains boron nitride.
The friction protective layer preferably further includes a lubricant having a hexagonal layered crystal structure.

さらに、複数の静翼がケーシング本体の内面部の周方向に固定されたケーシングと、複数の動翼が回転軸部材の周方向に固定され前記ケーシング内で回転するロータとを有することが好ましい。
また、前記摩擦保護層は、前記酸素富化した空気中で使用される前記複数の動翼の全表面に形成されることが好ましい。
また、前記摩擦保護層は、前記酸素富化した空気中で使用される前記複数の動翼において前記ケーシング本体の内面部と対向する先端部の表面上に形成されることが好ましい。
また、前記摩擦保護層は、前記酸素富化した空気中で使用される前記ケーシング本体の表面上に形成されることが好ましい。
また、前記摩擦保護層は、前記酸素富化した空気中で使用される前記複数の静翼の表面上に形成されることが好ましい。 Furthermore, it is preferable to have a casing in which a plurality of stationary blades are fixed in the circumferential direction of the inner surface portion of the casing body, and a rotor in which the plurality of moving blades are fixed in the circumferential direction of the rotating shaft member and rotate in the casing.
The friction protection layer is preferably formed on the entire surface of the plurality of blades used in the oxygen-enriched air.
The friction protective layer is preferably formed on a surface of a tip portion facing an inner surface portion of the casing body in the plurality of blades used in the oxygen-enriched air.
The friction protective layer is preferably formed on a surface of the casing body used in the oxygen-enriched air.
The friction protective layer is preferably formed on the surfaces of the plurality of stationary blades used in the oxygen-enriched air.

さらに、円筒形状を有するケーシングと、
前記ケーシング本体の内面部の周方向に設けられた環状のラビリンスリングを有し、
前記摩擦保護層は、前記酸素富化した空気中で使用される前記ラビリンスリングの内表面上に形成されることが好ましい。 A casing having a cylindrical shape;
An annular labyrinth ring provided in the circumferential direction of the inner surface of the casing body;
The friction protective layer is preferably formed on an inner surface of the labyrinth ring used in the oxygen-enriched air.

本発明によれば、酸素富化された空気中で使用されながらも発火現象を引き起こす要因となる火花の発生を抑制することができる。   ADVANTAGE OF THE INVENTION According to this invention, generation | occurrence | production of the spark used as the factor which causes an ignition phenomenon can be suppressed even if it is used in the oxygen enriched air.

本発明の実施形態１に係る高炉送風機の構成を表す一部破断斜視断面図である。It is a partially broken perspective sectional view showing composition of a blast furnace blower concerning Embodiment 1 of the present invention. 動翼の全表面に摩擦保護層を形成した実施形態１の高炉送風機を表す部分断面図である。It is a fragmentary sectional view showing the blast furnace air blower of Embodiment 1 which formed the friction protective layer in the whole surface of a moving blade. ケーシング本体の内面部と対向する動翼の先端部に摩擦保護層を形成した実施形態１の変形例に係る高炉送風機を表す部分断面図である。It is a fragmentary sectional view showing the blast furnace blower concerning the modification of Embodiment 1 in which the friction protection layer was formed in the tip part of the bucket opposed to the inner surface part of a casing main part. ケーシング本体の表面上に摩擦保護層を形成した実施形態２の高炉送風機を表す部分断面図である。It is a fragmentary sectional view showing the blast furnace air blower of Embodiment 2 which formed the friction protective layer on the surface of the casing main body. 静翼の表面上に摩擦保護層を形成した実施形態２の変形例に係る高炉送風機を表す部分断面図である。It is a fragmentary sectional view showing the blast furnace blower concerning the modification of Embodiment 2 which formed the friction protection layer on the surface of a stationary blade. ケーシングとロータの全表面に摩擦保護層を形成した実施形態２の他の変形例に係る高炉送風機を表す部分断面図である。It is a fragmentary sectional view showing the blast furnace blower concerning other modifications of Embodiment 2 which formed the friction protection layer in the whole surface of a casing and a rotor. ラビリンスリングの表面上に摩擦保護層を形成した実施形態３の高炉送風機を表す部分断面図である。It is a fragmentary sectional view showing the blast furnace blower of Embodiment 3 which formed the friction protection layer on the surface of a labyrinth ring.

以下に、添付の図面に示す好適な実施形態に基づいて、この発明を詳細に説明する。   Hereinafter, the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

実施形態１
図１に、本発明の一実施形態に係る高炉送風機１０の構成を示す。高炉送風機１０は、酸素富化した空気を吸入して高炉に送風する軸流圧縮機であって、内部を酸素富化した空気が流れるケーシング１２と、ケーシング１２の内部に回転可能に設けられたロータ１４とを有している。 Embodiment 1
In FIG. 1, the structure of the blast furnace blower 10 which concerns on one Embodiment of this invention is shown. The blast furnace blower 10 is an axial compressor that sucks oxygen-enriched air and blows it into the blast furnace. The blast furnace blower 10 is rotatably provided inside the casing 12 and a casing 12 through which oxygen-enriched air flows. And a rotor 14.

ケーシング１２は、鋼で作成された鋼製部材であり、筒状の形状を有するケーシング本体１６と、ケーシング本体１６の内周面上に固定された複数の静翼１８とを有する。
ケーシング本体１６は、軸方向に向かって縮径される内周面を有しており、その内部を酸素富化された空気が流れる（矢印ｘ方向）ものである。複数の静翼１８がケーシング本体１６の内周面上に全周にわたって配置されており、各静翼１８は一定間隔でケーシング本体１６の中心軸に向かって固定されている。このような周方向に沿って固定された複数の静翼１８がケーシング本体１６の軸方向に複数段配列されている。
なお、ケーシング本体１６と静翼１８の構成材料である鋼は、空気抵抗による応力に耐え得る強度を有し、耐熱性を有するものであれば特に限定されず、例えばケーシング本体１６には炭素鋼が用いられ、静翼１８にはステンレス鋼が用いられる。 The casing 12 is a steel member made of steel, and includes a casing main body 16 having a cylindrical shape and a plurality of stationary blades 18 fixed on the inner peripheral surface of the casing main body 16.
The casing body 16 has an inner peripheral surface that is reduced in diameter in the axial direction, and oxygen-enriched air flows through the inside (in the direction of the arrow x). A plurality of stationary blades 18 are arranged on the inner peripheral surface of the casing body 16 over the entire circumference, and the stationary blades 18 are fixed toward the central axis of the casing body 16 at regular intervals. A plurality of stationary blades 18 fixed along the circumferential direction are arranged in a plurality of stages in the axial direction of the casing body 16.
The steel that is a constituent material of the casing main body 16 and the stationary blade 18 is not particularly limited as long as it has strength that can withstand stress due to air resistance and has heat resistance. For example, the casing main body 16 includes carbon steel. And stainless steel is used for the stationary blade 18.

ロータ１４は、ケーシング１２内において回転可能に設けられた回転軸部材２０と、回転軸部材２０に固定された複数の動翼２２とを有する。
回転軸部材２０は、鋼で作成された鋼製部材であり、軸方向に向かって拡径する円柱状の形状を有し、ケーシング１２内においてケーシング本体１６の中心軸上に延在し、図示しない駆動手段により自らの軸周りに回転する。
動翼２２は、鋼で作成された鋼製部材であり、空気の流れに対して揚力を発生し得る飛行機等の翼と同様の断面形状を有し、複数の動翼２２が回転軸部材２０の外周面上に全周にわたって配置されており、各動翼２２は一定間隔で放射状に固定されている。このような周方向に沿って固定された複数の動翼２２が回転軸部材２０の軸方向に複数段配列されている。複数の動翼２２の回転軸部材２０の軸方向への配列と複数の静翼１８のケーシング本体１６の軸方向への配列は、交互に何段も並べられており、酸素富化された空気を連続的に圧縮して下流方向へ流すように構成されている。
なお、複数の静翼１８および複数の動翼２２の形状および向きは、酸素富化された空気を下流方向へ流すことができれば特に限定されない。また、回転軸部材２０と動翼２２を構成する鋼は、空気抵抗による応力に耐え得る強度を有し、耐熱性を有するものであれば特に限定されず、例えば回転軸部材２０には低合金鋼が用いられ、動翼２２にはステンレス鋼が用いられる。 The rotor 14 includes a rotating shaft member 20 that is rotatably provided in the casing 12, and a plurality of moving blades 22 fixed to the rotating shaft member 20.
The rotary shaft member 20 is a steel member made of steel, has a cylindrical shape whose diameter increases in the axial direction, extends on the central axis of the casing body 16 in the casing 12, and is illustrated. Rotate around its own axis by non-driving means.
The moving blade 22 is a steel member made of steel, and has a cross-sectional shape similar to that of a blade such as an airplane that can generate lift with respect to the air flow. The moving blades 22 are fixed radially at regular intervals. A plurality of moving blades 22 fixed along the circumferential direction are arranged in a plurality of stages in the axial direction of the rotary shaft member 20. The arrangement of the plurality of rotor blades 22 in the axial direction of the rotating shaft member 20 and the arrangement of the plurality of stationary blades 18 in the axial direction of the casing body 16 are alternately arranged in a number of stages, and oxygen-enriched air Is continuously compressed and flows in the downstream direction.
The shapes and directions of the plurality of stationary blades 18 and the plurality of moving blades 22 are not particularly limited as long as oxygen-enriched air can flow downstream. The steel constituting the rotary shaft member 20 and the rotor blade 22 is not particularly limited as long as it has strength that can withstand stress due to air resistance and has heat resistance. Steel is used, and stainless steel is used for the rotor blade 22.

図２の断面図（空気の流れに直交する方向からの断面図）に示すように、複数の動翼２２の全表面には摩擦保護層２４が形成されている。摩擦保護層２４は、アブレイダブル材から成り、動翼２２が他の部材（ケーシング本体１６等）と接触してもアブレイダブル材が容易に削れることにより摩擦熱を低減し火花の発生を抑制する。
ここで、摩擦保護層２４は、アブレイダブル材から成り、摩擦熱および発火を抑制して耐熱性を有するものであれば特に限定されず、例えば表１に示すような窒化ボロン系サーメットなどが利用できる。 As shown in a cross-sectional view of FIG. 2 (a cross-sectional view from a direction orthogonal to the air flow), a friction protective layer 24 is formed on the entire surface of the plurality of rotor blades 22. The friction protective layer 24 is made of an abradable material, and even if the blade 22 contacts other members (casing body 16 and the like), the abradable material can be easily scraped to reduce frictional heat and generate sparks. Suppress.
Here, the friction protective layer 24 is not particularly limited as long as it is made of an abradable material and has heat resistance by suppressing frictional heat and ignition. For example, a boron nitride cermet as shown in Table 1 can be used. Available.

Figure 0004654305
Figure 0004654305

次に、高炉送風機１０を用いて行われる、酸素富化された空気を高炉に送風する時の動作を説明する。   Next, the operation performed when the oxygen-enriched air is blown to the blast furnace performed using the blast furnace blower 10 will be described.

まず、高炉への送風が開始されると、回転軸部材２０がケーシング本体１６の周方向に回転し、それに伴い回転軸部材２０の軸方向に配列された複数の動翼２２も回転することで、高炉送風機１０内のケーシング１２とロータ１４との間に空気の流れが形成される（矢印ｘ方向）。
この状態で、図示しない空気分離装置より導かれた酸素により酸素を富化された空気が、ケーシング本体１６の空気吸入口２６から吸入され、回転軸部材２０に固定された動翼２２の揚力による圧縮とケーシング本体１６に固定された静翼１８による整流（後方の動翼２２の流入角度方向に転向）とを繰り返しながら連続的に圧縮されて下流方向へと流れていく。 First, when the ventilation to the blast furnace is started, the rotating shaft member 20 rotates in the circumferential direction of the casing body 16, and accordingly, the plurality of moving blades 22 arranged in the axial direction of the rotating shaft member 20 also rotate. An air flow is formed between the casing 12 and the rotor 14 in the blast furnace blower 10 (in the direction of the arrow x).
In this state, air enriched with oxygen introduced from an air separation device (not shown) is drawn from the air suction port 26 of the casing body 16 and is lifted by the moving blade 22 fixed to the rotary shaft member 20. While being repeatedly compressed and rectified by the stationary blade 18 fixed to the casing body 16 (turned in the inflow angle direction of the rear moving blade 22), it is continuously compressed and flows in the downstream direction.

ここで、鋼製部材である複数の動翼２２の全表面には、アブレイダブル材から成る摩擦保護層２４が形成されている。このような高炉送風機１０内では、酸素富化された空気を連続的に圧縮する必要があるため、それぞれの部材が互いに接近して設置されており、何らかの不具合によって接近した部材の接触により火花が生じ、高酸素雰囲気下では発火するおそれがあるが、摩擦保護層２４が、動翼２２と他の部材（ケーシング本体や静翼など）との接触による摩擦熱および火花の発生を低減し、発火を抑制することができる。   Here, a friction protective layer 24 made of an abradable material is formed on the entire surface of the plurality of rotor blades 22 that are steel members. In such a blast furnace blower 10, since it is necessary to continuously compress the oxygen-enriched air, the respective members are installed close to each other, and a spark is caused by the contact of the members approached due to some trouble. Although it may occur and ignite in a high oxygen atmosphere, the friction protective layer 24 reduces the generation of frictional heat and sparks due to contact between the moving blade 22 and other members (casing body, stationary blade, etc.), and ignition Can be suppressed.

酸素富化された空気は、連続的に圧縮されて下流方向へ流れていき、ケーシング本体１６の空気排出口２８から高炉へ送風される。   The oxygen-enriched air is continuously compressed and flows downstream, and is blown from the air discharge port 28 of the casing body 16 to the blast furnace.

このように、鋼製部材である複数の動翼２２の全表面にアブレイダブル材から成る摩擦保護層２４を形成することで、動翼２２と他の部材との接触による摩擦熱および火花の発生を低減して発火を抑制することができ、高酸素雰囲気下における高炉送風機の運転を安全に行うことができる。   Thus, by forming the friction protective layer 24 made of an abradable material on the entire surface of the plurality of moving blades 22 that are steel members, frictional heat and sparks caused by contact between the moving blades 22 and other members are formed. Generation | occurrence | production can be reduced and ignition can be suppressed and the driving | operation of the blast furnace blower in a high oxygen atmosphere can be performed safely.

なお、複数の動翼２２において他の鋼製部材と接触のおそれの高い部分の表面上にのみ摩擦保護層２４を形成してもよい。例えば、図３に示すように、複数の動翼２２においてケーシング本体１６の内面部と対向する先端部の表面上に摩擦保護層２４を形成してもよい。   In addition, you may form the friction protective layer 24 only on the surface of a part with high possibility of contact with another steel member in the some moving blade 22. FIG. For example, as shown in FIG. 3, the friction protection layer 24 may be formed on the surface of the tip portion facing the inner surface portion of the casing body 16 in the plurality of rotor blades 22.

実施形態２
実施形態１の摩擦保護層２４は、複数の動翼２２に形成されているが、その他の鋼製部材において接触のおそれがある部分の表面上に摩擦保護層２４を形成してもよい。例えば、図４に示すように、ケーシング本体１６の表面上に形成してもよく、図５に示すように、複数の静翼１８の表面上に形成してもよい。また、図６に示すように、ケーシング１２およびロータ１４の全表面に形成してもよい。
このように、接触のおそれのある鋼製部材に摩擦保護層２４を形成することで、発火の発生をさらに抑制することができる。 Embodiment 2
Although the friction protective layer 24 of the first embodiment is formed on the plurality of rotor blades 22, the friction protective layer 24 may be formed on the surface of a portion that may be contacted in other steel members. For example, as shown in FIG. 4, it may be formed on the surface of the casing body 16, and as shown in FIG. 5, it may be formed on the surfaces of the plurality of stationary blades 18. Moreover, as shown in FIG. 6, you may form in the whole surface of the casing 12 and the rotor 14. FIG.
Thus, by forming the friction protective layer 24 on the steel member that may be contacted, the occurrence of ignition can be further suppressed.

実施形態３
また、請求項１および２においてケーシング本体１６に固定されている静翼の代わりに、図７に示すように、ケーシング１６本体とロータ１４との間をシールして空気の漏れ量を減少させる環状のラビリンスリング３０を、ケーシング本体１６の内面部の周方向に（ロータ１４の外周を取り囲むように）設置し、その内表面上に摩擦保護層２４を形成することで、動翼２２とラビリンスリング３０の接触による摩擦熱および火花の発生を低減し、発火を抑制することができる。なお、ラビリンスリング３０は、鋼で作成された鋼製部材であり、空気の漏れ量を減少させ、耐熱性を有し、空気の応力に耐え得るものであれば特に限定されない。 Embodiment 3
Further, in place of the stationary blade fixed to the casing body 16 in claims 1 and 2, as shown in FIG. 7, an annular shape that seals between the casing 16 body and the rotor 14 to reduce the amount of air leakage. The labyrinth ring 30 is installed in the circumferential direction of the inner surface of the casing body 16 (so as to surround the outer periphery of the rotor 14), and the friction protection layer 24 is formed on the inner surface thereof, so that the moving blade 22 and the labyrinth ring are The generation of frictional heat and sparks due to the contact of 30 can be reduced, and ignition can be suppressed. The labyrinth ring 30 is a steel member made of steel, and is not particularly limited as long as it reduces the amount of air leakage, has heat resistance, and can withstand air stress.

また、実施形態１〜３の摩擦保護層２４は、六方晶系の層状結晶構造から成る潤滑材をさらに含んでもよい。これにより、鋼製部材同士の接触による発火をさらに抑制することができ、酸素濃度の高い環境であっても安全に高炉への送風を行うことができる。なお、六方晶系の層状結晶構造から成る潤滑材とは、例えば二硫化モリブデンや六方晶窒化ホウ素などが利用できる。   Further, the friction protective layer 24 of the first to third embodiments may further include a lubricant having a hexagonal layered crystal structure. Thereby, the ignition by the contact of steel members can further be suppressed, and even in an environment with a high oxygen concentration, it is possible to safely blow air to the blast furnace. For example, molybdenum disulfide or hexagonal boron nitride can be used as the lubricant having a hexagonal layered crystal structure.

１０ 高炉送風機
１２ ケーシング
１４ ロータ
１６ ケーシング本体
１８ 静翼
２０ 回転軸部材
２２ 動翼
２４ 摩擦保護層
２６ 空気吸入口
２８ 空気排出口
３０ ラビリンスリング DESCRIPTION OF SYMBOLS 10 Blast furnace blower 12 Casing 14 Rotor 16 Casing main body 18 Stator blade 20 Rotating shaft member 22 Rotor blade 24 Friction protection layer 26 Air inlet 28 Air outlet 30 Labyrinth ring

Claims (9)

酸素富化した空気を吸入して高炉に送風する高炉送風機であって、
前記酸素富化した空気中で使用される鋼製部材と、
前記鋼製部材の表面上に形成され、他の部材との接触により自らが削られるアブレイダブル材から成る摩擦保護層とを有することを特徴とする高炉送風機。 A blast furnace blower that sucks oxygen-enriched air and blows it into a blast furnace,
A steel member used in the oxygen-enriched air;
A blast furnace blower having a friction protective layer made of an abradable material which is formed on the surface of the steel member and is shaved by contact with another member . 前記アブレイダブル材は、窒化ホウ素を含むことを特徴とする請求項１に記載の高炉送風機。   The blast furnace blower according to claim 1, wherein the abradable material includes boron nitride. 前記摩擦保護層は、さらに、六方晶系の層状結晶構造から成る潤滑材を含むことを特徴とする請求項１または２に記載の高炉送風機。   The blast furnace blower according to claim 1 or 2, wherein the friction protective layer further includes a lubricant having a hexagonal layered crystal structure. さらに、複数の静翼がケーシング本体の内面部の周方向に固定されたケーシングと、複数の動翼が回転軸部材の周方向に固定され前記ケーシング内で回転するロータとを有することを特徴とする請求項１〜３のいずれかに記載の高炉送風機。   Furthermore, a plurality of stationary blades have a casing fixed in the circumferential direction of the inner surface portion of the casing body, and a plurality of moving blades are fixed in the circumferential direction of the rotating shaft member and have a rotor that rotates in the casing. The blast furnace blower according to any one of claims 1 to 3. 前記摩擦保護層は、前記酸素富化した空気中で使用される前記複数の動翼の全表面に形成されることを特徴とする請求項４に記載の高炉送風機。   The blast furnace blower according to claim 4, wherein the friction protective layer is formed on the entire surface of the plurality of blades used in the oxygen-enriched air. 前記摩擦保護層は、前記酸素富化した空気中で使用される前記複数の動翼において前記ケーシング本体の内面部と対向する先端部の表面上に形成されることを特徴とする請求項４に記載の高炉送風機。 It said friction protective layer is to claim 4, characterized in that formed on the surface of the tip portion facing the inner surface portion of said casing body at the plurality of blades that are used in the oxygen-enriched air The blast furnace blower described. 前記摩擦保護層は、前記酸素富化した空気中で使用される前記ケーシング本体の表面上に形成されることを特徴とする請求項４〜６のいずれかに記載の高炉送風機。   The blast furnace blower according to any one of claims 4 to 6, wherein the friction protective layer is formed on a surface of the casing body used in the oxygen-enriched air. 前記摩擦保護層は、前記酸素富化した空気中で使用される前記複数の静翼の表面上に形成されることを特徴とする請求項４〜７のいずれかに記載の高炉送風機。   The blast furnace blower according to any one of claims 4 to 7, wherein the friction protective layer is formed on surfaces of the plurality of stationary blades used in the oxygen-enriched air. さらに、円筒形状を有するケーシングと、
前記ケーシング本体の内面部の周方向に設けられた環状のラビリンスリングを有し、
前記摩擦保護層は、前記酸素富化した空気中で使用される前記ラビリンスリングの内表面上に形成されることを特徴とする請求項１〜３のいずれかに記載の高炉送風機。 A casing having a cylindrical shape;
An annular labyrinth ring provided in the circumferential direction of the inner surface of the casing body;
The blast furnace blower according to any one of claims 1 to 3, wherein the friction protective layer is formed on an inner surface of the labyrinth ring used in the oxygen-enriched air.
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JP2007154750A (en) * 2005-12-05 2007-06-21 Ishikawajima Harima Heavy Ind Co Ltd Oxygen compressor
JP2008128198A (en) * 2006-11-24 2008-06-05 Ihi Corp Rotor blade of compressor

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JP2007154750A (en) * 2005-12-05 2007-06-21 Ishikawajima Harima Heavy Ind Co Ltd Oxygen compressor
JP2008128198A (en) * 2006-11-24 2008-06-05 Ihi Corp Rotor blade of compressor

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