JP2002250509A - Burner nozzle - Google Patents

Burner nozzle

Info

Publication number
JP2002250509A
JP2002250509A JP2001049667A JP2001049667A JP2002250509A JP 2002250509 A JP2002250509 A JP 2002250509A JP 2001049667 A JP2001049667 A JP 2001049667A JP 2001049667 A JP2001049667 A JP 2001049667A JP 2002250509 A JP2002250509 A JP 2002250509A
Authority
JP
Japan
Prior art keywords
main body
burner nozzle
nozzle
burner
inner cylinder
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.)
Granted
Application number
JP2001049667A
Other languages
Japanese (ja)
Other versions
JP3897534B2 (en
Inventor
Yasuharu Chuma
康晴 中馬
Iwakiyo Amano
五輪磨 天野
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP2001049667A priority Critical patent/JP3897534B2/en
Publication of JP2002250509A publication Critical patent/JP2002250509A/en
Application granted granted Critical
Publication of JP3897534B2 publication Critical patent/JP3897534B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Landscapes

  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a burner nozzle that is prevented from being damaged by thermal stresses by suppressing the occurrence of deformation or cracks. SOLUTION: A double annular member 13 is formed of the front end section 11 and main body section 12 of this burner nozzle 7 by dividing the front end section 11 and fixed to the main body 12 with bolts 14 so that the member 13 may move relatively in the peripheral direction. When the front end section 11 becomes high in temperature and a temperature difference occurs between the section 11 and main body section 12, the member 13 expands and moves in the peripheral direction against the main body section 12 and reduces generated stresses by absorbing the difference between the thermal expansions of the sections 11 and 12. Therefore, the damage to the burner nozzle 7 by the thermal stresses can be prevented by suppressing the occurrence of deformation and cracks.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、例えば、発電用ボ
イラやガス化炉における燃焼装置のバーナーノズルに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner nozzle of a combustion device in, for example, a power boiler or a gasifier.

【０００２】[0002]

【従来の技術】例えば、発電用ボイラの火炉には燃焼装
置が設けられ、燃焼装置には火炉を臨むバーナーノズル
が備えられている。例えば、ガス焚きのボイラのバーナ
ーノズルとしては、内筒から一次空気、外筒から二次空
気を火炉に送給すると共に燃料ノズルから燃料を火炉に
送給し、火炉に所定の状態の火炎を発生させるようにな
っている。液体燃料焚きのバーナーノズルや微粉炭焚き
のバーナーノズルも、燃料が種類が異なるだけで略同様
な構成となっている。2. Description of the Related Art For example, a furnace of a power generation boiler is provided with a combustion device, and the combustion device is provided with a burner nozzle facing the furnace. For example, as a burner nozzle of a gas-fired boiler, primary air is supplied from an inner cylinder, secondary air is supplied from an outer cylinder to a furnace, and fuel is supplied from a fuel nozzle to the furnace, and a flame in a predetermined state is supplied to the furnace. Is to be generated. Liquid fuel-fired burner nozzles and pulverized coal-fired burner nozzles have substantially the same configuration except that the type of fuel is different.

【０００３】[0003]

【発明が解決しようとする課題】上述したように、バー
ナーノズルの先端は火炉に晒されることになり、火炎や
炉内の輻射熱により高温になってしまう。内筒と外筒と
の間はリブでつながっているが、バーナーノズルの先端
と後端との間には長手方向で温度差が生じ、且つ、内筒
は燃料等の流体により冷却される状態になって外筒に対
して相対的に温度が低くなり、内筒と外筒との間で温度
差が生じる。この温度差のため、バーナーノズルの先端
部位は熱応力が発生し、変形や亀裂（クリープ損傷）が
発生する虞があった。従って、定期的に点検を行って、
変形や亀裂に対する対策または交換を講じる必要があ
る。As described above, the tip of the burner nozzle is exposed to the furnace, and is heated to a high temperature by a flame or radiant heat in the furnace. A rib is connected between the inner cylinder and the outer cylinder, but a temperature difference occurs in the longitudinal direction between the tip and the rear end of the burner nozzle, and the inner cylinder is cooled by a fluid such as fuel. , The temperature becomes relatively low with respect to the outer cylinder, and a temperature difference occurs between the inner cylinder and the outer cylinder. Due to this temperature difference, thermal stress is generated at the tip of the burner nozzle, and there is a possibility that deformation or cracking (creep damage) may occur. Therefore, check regularly,
Countermeasures or replacements for deformation and cracks need to be taken.

【０００４】本発明は上記状況に鑑みてなされたもの
で、熱応力に対して損傷が生じにくいバーナーノズルを
提供することを目的とする。[0004] The present invention has been made in view of the above circumstances, and has as its object to provide a burner nozzle that is less likely to be damaged by thermal stress.

【０００５】[0005]

【課題を解決するための手段】上記目的を達成するため
の本発明のバーナーノズルは、内筒と外筒とからなるバ
ーナーノズルにおいて、先端部を分割して本体部と二重
円環部材とし、二重円環部材を相対的に周方向に移動可
能に連結部材により本体部に取り付けたことを特徴とす
る。According to the present invention, there is provided a burner nozzle comprising an inner cylinder and an outer cylinder, the tip of which is divided into a main body and a double annular member. The double annular member is attached to the main body by a connecting member so as to be relatively movable in the circumferential direction.

【０００６】また、上記目的を達成するための本発明の
バーナーノズルは、内筒と外筒とからなり、内筒と外筒
との間にリブを設けたバーナーノズルにおいて、先端部
を分割して本体部と二重円環部材とし、二重円環部材を
相対的に周方向に移動可能に連結部材により本体部に取
り付けたことを特徴とする。A burner nozzle according to the present invention for attaining the above object comprises an inner cylinder and an outer cylinder, and a burner nozzle in which a rib is provided between the inner cylinder and the outer cylinder has a divided front end. The main body and the double annular member, and the double annular member is attached to the main body by a connecting member so as to be relatively movable in the circumferential direction.

【０００７】また、上記目的を達成するための本発明の
バーナーノズルは、内筒と外筒とからなり、内筒と外筒
との間にリブを設けたバーナーノズルにおいて、先端部
を分割して本体部と二重円環部材とし、更に、二重円環
部材を内筒部と外筒部とに分割し、連結部材により内筒
部と外筒部とを本体部に取り付けて内筒部と外筒部と本
体部とを相対的に周方向に移動可能にして二重円環部材
を本体部に取り付けたことを特徴とする。In order to achieve the above object, a burner nozzle according to the present invention comprises an inner cylinder and an outer cylinder, and a burner nozzle in which a rib is provided between the inner cylinder and the outer cylinder has a tip portion divided. The main body and the double annular member are further divided into an inner cylindrical portion and an outer cylindrical portion, and the inner cylindrical portion and the outer cylindrical portion are attached to the main body portion by a connecting member, so that the inner cylindrical portion is formed. The double annular member is attached to the main body such that the main body, the outer cylinder, and the main body are relatively movable in the circumferential direction.

【０００８】そして、リブを先端から後退させて内筒と
外筒との間に設けたことを特徴とする。また、二重円環
部材の内側に放熱フィンを設けたことを特徴とする。[0008] The rib is provided between the inner cylinder and the outer cylinder by retreating from the tip. Further, a heat radiation fin is provided inside the double annular member.

【０００９】また、上記目的を達成するための本発明の
バーナーノズルは、内筒と外筒とからなるバーナーノズ
ルにおいて、先端部の内筒の外側及び外筒の内側にそれ
ぞれ放熱フィンを設けたことを特徴とする。According to another aspect of the present invention, there is provided a burner nozzle including an inner cylinder and an outer cylinder, wherein radiation fins are provided on an outer side of the inner cylinder at an end portion and on an inner side of the outer cylinder. It is characterized by the following.

【００１０】[0010]

【発明の実施の形態】以下図面に基づいて本発明の実施
形態例を説明する。Embodiments of the present invention will be described below with reference to the drawings.

【００１１】図１乃至図４に基づいて本発明の第１実施
形態例を説明する。図１には本発明の第１実施形態例に
係るバーナーノズルを備えた燃焼装置（バーナー）の要
部断面、図２にはバーナーノズルの分解斜視、図３には
バーナーノズルの断面、図４にはバーナーノズルの正面
を示してある。A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view of a main part of a combustion device (burner) provided with a burner nozzle according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the burner nozzle, FIG. Shows the front of the burner nozzle.

【００１２】図１に示すように、ボイラ本体１にはバー
ナー風箱２が備えられ、バーナー風箱２にはバーナー３
が設けられている。火炉４の炉壁５の所定位置には開口
６が設けられ、開口６にはバーナー３のバーナーノズル
７が臨んで配置されている。バーナー３は内筒としての
一次ノズル８と外筒としての二次ノズル９とで構成さ
れ、一次ノズル８内には燃料を送給する燃料ノズル２０
が配置されている。As shown in FIG. 1, the boiler main body 1 is provided with a burner-like box 2 and the burner-like box 2 has a burner 3.
Is provided. An opening 6 is provided at a predetermined position on the furnace wall 5 of the furnace 4, and the burner nozzle 7 of the burner 3 is arranged in the opening 6. The burner 3 is composed of a primary nozzle 8 as an inner cylinder and a secondary nozzle 9 as an outer cylinder, and a fuel nozzle 20 for supplying fuel inside the primary nozzle 8.
Is arranged.

【００１３】バーナー風箱２内には図示しない送風装置
から燃焼用空気が送られ、燃焼用空気は一次ノズル８及
び二次ノズル９に送られる。一次ノズル８に送られた燃
焼用空気は別途送り込まれる所定の混合気と混合されて
燃料ノズル１０の先端外周から火炉４内に噴出され、二
次ノズル９に送られた燃料用空気は別途送り込まれる所
定の混合気と混合されて一次ノズル８の先端外周から火
炉４内に噴出される。また、燃料ノズル２０の先端から
は所定状態の燃料が火炉４内に噴出され、所定状態の火
炎を火炉４内に発生させる。In the burner wind box 2, combustion air is sent from a blower (not shown), and the combustion air is sent to a primary nozzle 8 and a secondary nozzle 9. The combustion air sent to the primary nozzle 8 is mixed with a predetermined air-fuel mixture sent separately, and is ejected from the outer periphery of the tip of the fuel nozzle 10 into the furnace 4, and the fuel air sent to the secondary nozzle 9 is sent separately. The mixture is mixed with a predetermined air-fuel mixture and injected into the furnace 4 from the outer periphery of the tip of the primary nozzle 8. Further, a fuel in a predetermined state is ejected from the tip of the fuel nozzle 20 into the furnace 4, and a flame in a predetermined state is generated in the furnace 4.

【００１４】図１乃至図３に示すように、バーナー３の
バーナーノズル７の周方向には、一次ノズル８と二次ノ
ズル９の間に複数のリブ１０が配されている。バーナー
ノズル７は先端部１１が分割されてそれぞれにリブ１０
が設けられた本体部１２と二重円環部材１３とされ、本
体部１２と二重円環部材１３はリブ１０の部位で連結さ
れて二重円環部材１３が相対的に周方向に移動可能とな
っている。図３に示すように、リブ１０の先端10a 側は
バーナーノズル７の先端7aから幅Ｔ後退して設けられて
いる。尚、図１０に点線で示すように、リブ１０の先端
10a を後退側にＵ字状部を形成してアールを設けた状態
にすることも可能である。As shown in FIGS. 1 to 3, a plurality of ribs 10 are arranged between the primary nozzle 8 and the secondary nozzle 9 in the circumferential direction of the burner nozzle 7 of the burner 3. The burner nozzle 7 has a tip portion 11 divided into ribs 10 each.
The main body 12 and the double annular member 13 are provided at the position of the rib 10, and the double annular member 13 relatively moves in the circumferential direction. It is possible. As shown in FIG. 3, the tip 10a side of the rib 10 is provided to retreat from the tip 7a of the burner nozzle 7 by a width T. In addition, as shown by a dotted line in FIG.
It is also possible to form a U-shaped portion on the retreat side of 10a to provide a radius.

【００１５】図３に示すように、バーナーノズル７の先
端部１１は、本体部１２と二重円環部材１３とが連結部
材としてのボルト１４で連結されている。即ち、ボルト
１４は両端側にねじ部14a,14b が形成され、一方のねじ
部14a （図中右側）が本体部１２のリブ１０の部位に螺
合している。ボルト１４には二重円環部材１３のリブ１
０の部位が貫通し、ボルト１４の他方のねじ部14b （図
中左側）にナット１５が螺合して本体部１２と二重円環
部材１３とが連結されている。バーナー３が設けられて
いる。火炉４の炉壁５の所定位置には開口６が設けら
れ、開口６にはバーナー３のバーナーノズル７が臨んで
配置されている。バーナー３は内筒としての一次ノズル
８と外筒としての二次ノズル９とで構成され、一次ノズ
ル８内には燃料を送給する燃料ノズル１０が支持されて
いる。As shown in FIG. 3, at a tip 11 of the burner nozzle 7, a main body 12 and a double annular member 13 are connected by bolts 14 as connecting members. That is, the bolt 14 has threaded portions 14a and 14b formed on both ends, and one threaded portion 14a (right side in the figure) is screwed into the rib 10 of the main body 12. Bolt 14 has rib 1 of double annular member 13
No. 0 penetrates, the nut 15 is screwed into the other threaded portion 14b (left side in the figure) of the bolt 14, and the main body 12 and the double annular member 13 are connected. A burner 3 is provided. An opening 6 is provided at a predetermined position on the furnace wall 5 of the furnace 4, and the burner nozzle 7 of the burner 3 is arranged in the opening 6. The burner 3 is composed of a primary nozzle 8 as an inner cylinder and a secondary nozzle 9 as an outer cylinder, and a fuel nozzle 10 for feeding fuel is supported in the primary nozzle 8.

【００１６】バーナー風箱２内には図示しない送風装置
から燃焼用空気が送られ、燃焼用空気は一次ノズル８及
び二次ノズル９に送られる。一次ノズル８に送られた燃
焼用空気は別途送り込まれる所定の混合気と混合されて
燃料ノズル２０の先端外周から火炉４内に噴出され、二
次ノズル９に送られた燃料用空気は別途送り込まれる所
定の混合気と混合されて一次ノズル８の先端外周から火
炉４内に噴出される。また、燃料ノズル２０の先端から
は所定状態の燃料が火炉４内に噴出され、所定状態の火
炎を火炉４内に発生させる。In the burner wind box 2, combustion air is sent from a blower (not shown), and the combustion air is sent to a primary nozzle 8 and a secondary nozzle 9. The air for combustion sent to the primary nozzle 8 is mixed with a predetermined air-fuel mixture sent separately, and is ejected from the outer periphery of the tip of the fuel nozzle 20 into the furnace 4, and the air for fuel sent to the secondary nozzle 9 is sent separately. The mixture is mixed with a predetermined air-fuel mixture and injected into the furnace 4 from the outer periphery of the tip of the primary nozzle 8. Further, a fuel in a predetermined state is ejected from the tip of the fuel nozzle 20 into the furnace 4, and a flame in a predetermined state is generated in the furnace 4.

【００１７】図１乃至図３に示すように、バーナー３の
バーナーノズル７の周方向には、一次ノズル８と二次ノ
ズル９の間に複数のリブ１０が配されている。バーナー
ノズル７は先端部１１が分割されてそれぞれにリブ１０
が設けられた本体部１２と二重環部材１３とされ、本体
部１２と二重環部材１３はリブ１０の部位で連結されて
二重環部材１３が相対的に周方向に移動可能となってい
る。図３に示すように、リブ１０の先端10a 側はバーナ
ーノズル７の先端7aから幅Ｔ後退して設けられている。
尚、図１０に点線で示すように、リブ１０の先端10a を
後退側にＵ字状部を形成してアールを設けた状態にする
ことも可能である。As shown in FIGS. 1 to 3, a plurality of ribs 10 are arranged between the primary nozzle 8 and the secondary nozzle 9 in the circumferential direction of the burner nozzle 7 of the burner 3. The burner nozzle 7 has a tip portion 11 divided into ribs 10 each.
The main body 12 and the double ring member 13 are provided with a rib, and the main body 12 and the double ring member 13 are connected at the portion of the rib 10 so that the double ring member 13 can relatively move in the circumferential direction. ing. As shown in FIG. 3, the tip 10a side of the rib 10 is provided to retreat from the tip 7a of the burner nozzle 7 by a width T.
As shown by the dotted line in FIG. 10, it is also possible to form a U-shaped portion on the retreating side of the tip 10a of the rib 10 to provide a radius.

【００１８】図３に示すように、バーナーノズル７の先
端部１１は、本体部１２と二重環部材１３とが連結部材
としてのボルト１４で連結されている。即ち、ボルト１
４は両端側にねじ部14a,14b が形成され、一方のねじ部
14a （図中右側）が本体部１２のリブ１０の部位に螺合
している。ボルト１４には二重環部材１３のリブ１０の
部位が貫通し、ボルト１４の他方のねじ部14b （図中左
側）にナット１５が螺合して本体部１２と二重環部材１
３とが連結されている。As shown in FIG. 3, at a tip 11 of the burner nozzle 7, a main body 12 and a double ring member 13 are connected by a bolt 14 as a connecting member. That is, bolt 1
4 has screw portions 14a and 14b formed at both ends, and one of the screw portions
14a (right side in the figure) is screwed into the rib 10 of the main body 12. The portion of the rib 10 of the double ring member 13 penetrates the bolt 14, and the nut 15 is screwed into the other threaded portion 14 b (left side in the figure) of the bolt 14, and the main body 12 and the double ring member 1 are screwed.
3 are connected.

【００１９】二重環部材１３のボルト１４が貫通する貫
通穴１７はボルト１４の径より大径に形成され、連結時
であっても本体部１２に対して二重環部材１３が相対的
に周方向に移動可能となっている。図中の符号で14c
は、ボルト１４を本体部１２に螺合する際に工具を嵌合
させるために使用する工具掛部である。尚、ボルト１４
を予め本体部１２に固定したスタットボルトとしてもよ
く、六角ボルト等頭部付きのボルトを用いてもよい。The through hole 17 through which the bolt 14 of the double ring member 13 penetrates is formed to have a diameter larger than the diameter of the bolt 14. It is movable in the circumferential direction. 14c in the figure
Is a tool hook used for fitting a tool when the bolt 14 is screwed into the main body 12. The bolt 14
May be used as a stud bolt previously fixed to the main body 12, or a bolt with a head such as a hexagon bolt may be used.

【００２０】図４に示すように、バーナーノズル７の先
端部１１の二重環部材１３の内周（内側）には多数の放
熱フィン１６が設けられ、一次ノズル８側の放熱フィン
１６と二次ノズル９側の放熱フィン１６とは、周方向で
位相をずらして形成されている。放熱フィン１６によ
り、例えば、温度が４０度から５０度低下するようにな
っている。As shown in FIG. 4, a large number of radiating fins 16 are provided on the inner periphery (inside) of the double annular member 13 at the tip end portion 11 of the burner nozzle 7, and two radiating fins 16 on the primary nozzle 8 side are provided. The radiation fins 16 on the side of the next nozzle 9 are formed so as to be shifted in phase in the circumferential direction. The radiation fins 16 reduce the temperature, for example, from 40 degrees to 50 degrees.

【００２１】上記構成のバーナーノズル７は、先端部１
１を分割して本体部１２と二重環部材１３とし、二重環
部材１３を相対的に周方向に移動可能にボルト１４で本
体部１２に取り付けたので、先端部１１が高温になって
本体部１２との間に温度差が生じた場合、本体部１２に
対して二重環部材１３が周方向に膨張して移動し、熱膨
張差を吸収することができ、発生応力が小さくなって変
形や亀裂の発生が抑制されて熱応力による損傷（クリー
プ損傷）を防止することができる。The burner nozzle 7 having the above-described structure is provided with the tip 1
1 is divided into a main body portion 12 and a double ring member 13, and the double ring member 13 is attached to the main body portion 12 with bolts 14 so as to be relatively movable in the circumferential direction. When a temperature difference is generated between the main body portion 12 and the main body portion 12, the double ring member 13 expands and moves in the circumferential direction with respect to the main body portion 12, so that the difference in thermal expansion can be absorbed, and the generated stress decreases. Thus, the occurrence of deformation and cracks is suppressed, and damage (creep damage) due to thermal stress can be prevented.

【００２２】また、二重環部材１３のリブ１０の先端10
a をバーナーノズル７の先端部7aから後退させたので、
応力発生位置が低温側に移動してリブ１０の取り付け部
が高温に晒されることが抑制され、二重環部材１３とリ
ブ１０との結合部の熱応力による損傷が抑制される。ま
た、二重環部材１３の内側に放熱フィン１６を設けたの
で、放熱によりバーナーノズル７の先端部の温度が低下
し、熱応力を低減することができる。The tip 10 of the rib 10 of the double ring member 13
a was retracted from the tip 7a of the burner nozzle 7,
The position where the stress is generated moves to the low temperature side and the mounting portion of the rib 10 is suppressed from being exposed to the high temperature, and the damage due to the thermal stress at the joint between the double ring member 13 and the rib 10 is suppressed. Further, since the heat radiation fins 16 are provided inside the double ring member 13, the heat radiation lowers the temperature of the tip of the burner nozzle 7, thereby reducing the thermal stress.

【００２３】このため、バーナーノズル７の変形及び亀
裂の発生が防止されて長寿命化を図ることが可能にな
り、バーナーノズル７が損傷した場合であっても、二重
環部材１３を交換することで対処することができる。For this reason, it is possible to prevent the deformation and cracking of the burner nozzle 7 and extend the life thereof, and to replace the double ring member 13 even if the burner nozzle 7 is damaged. That can be dealt with.

【００２４】上述した実施形態例では、リブ１０を設け
たバーナーノズル７を例に挙げて説明したが、リブ１０
を省略することも可能である。また、先端部１１を分割
することなく、一体構造のバーナーノズルにおいてリブ
１０を設けてバーナーノズルの温度を低下させて変形や
亀裂を抑制するようにしてもよい。In the above embodiment, the burner nozzle 7 provided with the rib 10 has been described as an example.
May be omitted. Further, the rib 10 may be provided in the integrated burner nozzle without lowering the tip portion 11 to reduce the temperature of the burner nozzle to suppress deformation and cracking.

【００２５】図５、図６に基づいて本発明の第２実施形
態例を説明する。図５には本発明の第２実施形態例に係
るバーナーノズルの分解斜視、図６にはバーナーノズル
の断面を示してある。尚、図５、図６は第１実施形態例
の図２及び図３に相当するものであり、第１実施形態例
のバーナーノズル７が本実施形態例におけるバーナーノ
ズル２１に相当する。このため、第１実施形態例と同一
部材には同一符号を付してバーナーの全体構成の説明及
び重複する説明は省略してある。A second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is an exploded perspective view of a burner nozzle according to a second embodiment of the present invention, and FIG. 6 is a cross-sectional view of the burner nozzle. FIGS. 5 and 6 correspond to FIGS. 2 and 3 of the first embodiment, and the burner nozzle 7 of the first embodiment corresponds to the burner nozzle 21 of the present embodiment. Therefore, the same members as those of the first embodiment are denoted by the same reference numerals, and the description of the entire configuration of the burner and the redundant description are omitted.

【００２６】図５、図６に示すように、バーナーノズル
２１の周方向には、一次ノズル８と二次ノズル９の間に
複数のリブ１０が配されている。バーナーノズル２１は
先端部２２が分割されてそれぞれにリブ１０が設けられ
た本体部２３と二重環部材２４とされ、二重環部材２４
は一次ノズル８を形成する内筒部２５と二次ノズル９を
形成する外筒部２６とに分割されている。本体部２３と
二重環部材２４とは連結部材としてのボルト１４で連結
され、内筒部２５と外筒部２６と本体部２３とは相対的
に周方向に移動可能にされている。As shown in FIGS. 5 and 6, a plurality of ribs 10 are arranged between the primary nozzle 8 and the secondary nozzle 9 in the circumferential direction of the burner nozzle 21. The burner nozzle 21 is divided into a main body 23 provided with a rib 10 provided at a tip end portion 22 and a double ring member 24.
Is divided into an inner cylinder part 25 forming the primary nozzle 8 and an outer cylinder part 26 forming the secondary nozzle 9. The main body 23 and the double ring member 24 are connected by bolts 14 as connecting members, and the inner cylinder 25, the outer cylinder 26, and the main body 23 are relatively movable in the circumferential direction.

【００２７】即ち、ボルト１４は両端側にねじ部14a,14
b が形成され、一方のねじ部14a （図中右側）が本体部
２３のリブ１０の部位に螺合している。ボルト１４には
二重環部材２４の内筒部２５及び外筒部２６のリブ１０
の部位25a,26a が貫通し、ボルト１４の他方のねじ部14
b （図中左側）にナット１５が螺合して本体部２３と内
筒部２５及び外筒部２６からなる二重環部材２４とが連
結されている。内筒部２５及び外筒部２６の部位25a,26
a の貫通穴25b,26b はボルト１４の径より大径に形成さ
れ、連結時であっても本体部１２に対して内筒部２５及
び外筒部２６が個別に相対的に周方向に移動可能となっ
ている。That is, the bolts 14 are threaded at both ends.
b is formed, and one threaded portion 14a (right side in the figure) is screwed into the rib 10 of the main body 23. Bolts 14 have ribs 10 on inner cylinder 25 and outer cylinder 26 of double ring member 24.
Parts 25a and 26a of the bolt 14
b (left side in the figure), the nut 15 is screwed, and the main body 23 and the double ring member 24 including the inner cylinder 25 and the outer cylinder 26 are connected. Parts 25a and 26 of the inner cylinder part 25 and the outer cylinder part 26
The through-holes 25b and 26b of a are formed to have a diameter larger than the diameter of the bolt 14, so that the inner cylinder part 25 and the outer cylinder part 26 individually move in the circumferential direction relatively to the main body part 12 even during connection. It is possible.

【００２８】尚、内筒部２５の外側及び外筒部２６の内
側に、即ち、二重環部材２４の内周（内側）に多数の放
熱フィン１６（図４参照）を設けることも可能で、放熱
フィン１６により、バーナーノズル２１の先端部２２の
温度を、例えば、４０度から５０度低下させるようにす
ることもできる。It is also possible to provide a large number of radiating fins 16 (see FIG. 4) outside the inner tube portion 25 and inside the outer tube portion 26, that is, inside (inside) the double ring member 24. Further, the temperature of the tip end portion 22 of the burner nozzle 21 can be reduced by, for example, 40 degrees to 50 degrees by the radiation fins 16.

【００２９】上記構成のバーナーノズル２１は、先端部
２２を分割して本体部２３と二重環部材２４とし、更
に、二重環部材２４を内筒部２５と外筒部２６とに分割
し、内筒部２５及び外筒部２６からなる二重環部材２４
を相対的に周方向に移動可能にボルト１４で本体部２３
に取り付けたので、先端部２２が高温になって本体部１
２との間に温度差が生じた場合、及び、先端部２２の一
次ノズル８側と二次ノズル９側との間に温度差が生じた
場合、本体部２３に対して内筒部２５と外筒部２６が周
方向に個別に膨張して移動して二重環部材２４が周方向
に移動し、熱膨張差を吸収することができ、発生応力が
小さくなって変形や亀裂の発生が抑制されて熱応力によ
る損傷を防止することができる。In the burner nozzle 21 having the above-described structure, the distal end portion 22 is divided into a main body 23 and a double annular member 24. The double annular member 24 is further divided into an inner cylindrical portion 25 and an outer cylindrical portion 26. , A double ring member 24 composed of an inner cylindrical portion 25 and an outer cylindrical portion 26
Can be relatively moved in the circumferential direction with the bolt
, The tip 22 becomes hot and the body 1
2 and a temperature difference between the primary nozzle 8 side and the secondary nozzle 9 side of the tip 22, the inner cylinder 25 and the body 23. The outer tubular portion 26 expands and moves individually in the circumferential direction, and the double ring member 24 moves in the circumferential direction, so that the difference in thermal expansion can be absorbed. It can be suppressed and damage due to thermal stress can be prevented.

【００３０】このため、バーナーノズル２１の変形及び
亀裂の発生が防止されて長寿命化を図ることが可能にな
り、バーナーノズル２１が損傷した場合であっても、内
筒部２５及び外筒部２６を個別に交換すること、もしく
は、内筒部２５及び外筒部２６からなる二重環部材２４
を交換することで対処することができる。For this reason, it is possible to prevent deformation and cracks of the burner nozzle 21 and to prolong the life thereof. Even if the burner nozzle 21 is damaged, the inner cylindrical portion 25 and the outer cylindrical portion 26, or a double ring member 24 composed of an inner cylindrical portion 25 and an outer cylindrical portion 26.
Can be dealt with by replacing.

【００３１】本発明は、ガス燃料焚き、液体燃料焚き、
微粉炭焚きの燃焼装置や、ガス化炉における燃焼装置の
バーナーノズルに適用することが可能である。The present invention relates to gas-fired fuel, liquid-fuel fired,
The present invention can be applied to a pulverized coal-fired combustion device or a burner nozzle of a combustion device in a gasifier.

【００３２】[0032]

【発明の効果】本発明のバーナーノズルは、内筒と外筒
とからなるバーナーノズルにおいて、先端部を分割して
本体部と二重環部材とし、二重環部材を相対的に周方向
に移動可能に連結部材により本体部に取り付けたので、
先端部が高温になって本体部との間に温度差が生じた場
合、本体部に対して二重環部材が膨張して周方向に移動
し、熱膨張差を吸収することができ、発生応力が小さく
なって変形や亀裂の発生が抑制されて熱応力による損傷
を防止することができる。この結果、熱応力に対して損
傷が生じにくいバーナーノズルとすることが可能にな
る。According to the burner nozzle of the present invention, in a burner nozzle composed of an inner cylinder and an outer cylinder, a tip portion is divided into a main body and a double ring member, and the double ring member is relatively moved in the circumferential direction. Since it was movably attached to the main body by a connecting member,
When the temperature of the distal end becomes high and a temperature difference occurs between the body and the main body, the double ring member expands with respect to the main body and moves in the circumferential direction, thereby absorbing the difference in thermal expansion. The stress is reduced to suppress deformation and cracks, thereby preventing damage due to thermal stress. As a result, a burner nozzle that is less likely to be damaged by thermal stress can be provided.

【００３３】また、本発明のバーナーノズルは、内筒と
外筒とからなり、内筒と外筒との間にリブを設けたバー
ナーノズルにおいて、先端部を分割して本体部と二重環
部材とし、二重環部材を相対的に周方向に移動可能に連
結部材により本体部に取り付けたので、先端部が高温に
なって本体部との間に温度差が生じた場合、本体部に対
して二重環部材が膨張して周方向に移動し、熱膨張差を
吸収することができ、発生応力が小さくなって変形や亀
裂の発生が抑制されて熱応力による損傷を防止すること
ができる。この結果、熱応力に対して損傷が生じにくい
バーナーノズルとすることが可能になる。Further, the burner nozzle of the present invention comprises an inner cylinder and an outer cylinder, and has a rib provided between the inner cylinder and the outer cylinder. Since the double ring member is attached to the main body by the connecting member so as to be relatively movable in the circumferential direction, if the temperature of the distal end becomes high and a temperature difference occurs between the main body and the main body, the double ring member is attached to the main body. On the other hand, the double ring member expands and moves in the circumferential direction, absorbing the difference in thermal expansion, reducing the generated stress, suppressing deformation and cracking, and preventing damage due to thermal stress. it can. As a result, a burner nozzle that is less likely to be damaged by thermal stress can be provided.

【００３４】また、本発明のバーナーノズルは、内筒と
外筒とからなり、内筒と外筒との間にリブを設けたバー
ナーノズルにおいて、先端部を分割して本体部と二重環
部材とし、更に、二重環部材を内筒部と外筒部とに分割
し、連結部材により内筒部と外筒部とを本体部に取り付
けて内筒部と外筒部と本体部とを相対的に周方向に移動
可能にして二重環部材を本体部に取り付けたので、先端
部が高温になって本体部との間に温度差が生じた場合、
及び、先端部の内筒側と外筒側との間に温度差が生じた
場合、本体部に対して内筒部と外筒部が周方向に個別に
膨張して移動して二重環部材が周方向に移動し、熱膨張
差を吸収することができ、発生応力が小さくなって変形
や亀裂の発生が抑制されて熱応力による損傷を防止する
ことができる。この結果、熱応力に対して損傷が生じに
くいバーナーノズルとすることが可能になる。Further, the burner nozzle of the present invention comprises an inner cylinder and an outer cylinder, and has a rib provided between the inner cylinder and the outer cylinder. And further, the double ring member is divided into an inner cylindrical portion and an outer cylindrical portion, and the inner cylindrical portion and the outer cylindrical portion are attached to the main body portion by a connecting member, and the inner cylindrical portion, the outer cylindrical portion, and the main body portion are attached. Is relatively movable in the circumferential direction and the double ring member is attached to the main body, so when the temperature of the front end becomes high and a temperature difference occurs with the main body,
And, when a temperature difference occurs between the inner cylinder side and the outer cylinder side at the tip end, the inner cylinder section and the outer cylinder section individually expand and move in the circumferential direction with respect to the main body section and move to the double ring. The member moves in the circumferential direction, and the difference in thermal expansion can be absorbed, the generated stress is reduced, and deformation and cracks are suppressed, so that damage due to thermal stress can be prevented. As a result, a burner nozzle that is less likely to be damaged by thermal stress can be provided.

【００３５】また、本発明のバーナーノズルは、内筒と
外筒とからなるバーナーノズルにおいて、先端部の内筒
の外側及び外筒の内側にそれぞれ放熱フィンを設けたの
で、先端部が高温になった場合、放熱フィンにより温度
を低下させて発生応力が小さくなって変形や亀裂の発生
が抑制されて熱応力による損傷を防止することができ
る。この結果、熱応力に対して損傷が生じにくいバーナ
ーノズルとすることが可能になる。Further, in the burner nozzle of the present invention, in the burner nozzle composed of the inner cylinder and the outer cylinder, the radiation fins are provided outside the inner cylinder at the tip and inside the outer cylinder, respectively. In such a case, the temperature is reduced by the heat radiation fins, the generated stress is reduced, and the occurrence of deformation and cracks is suppressed, so that damage due to thermal stress can be prevented. As a result, a burner nozzle that is less likely to be damaged by thermal stress can be provided.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の第１実施形態例に係るバーナーノズル
を備えた燃焼装置（バーナー）の要部断面図。FIG. 1 is a sectional view of a main part of a combustion device (burner) provided with a burner nozzle according to a first embodiment of the present invention.

【図２】バーナーノズルの分解斜視図。FIG. 2 is an exploded perspective view of a burner nozzle.

【図３】バーナーノズルの断面図。FIG. 3 is a sectional view of a burner nozzle.

【図４】バーナーノズルの正面図。FIG. 4 is a front view of a burner nozzle.

【図５】本発明の第２実施形態例に係るバーナーノズル
の分解斜視図。FIG. 5 is an exploded perspective view of a burner nozzle according to a second embodiment of the present invention.

【図６】バーナーノズルの断面図。FIG. 6 is a sectional view of a burner nozzle.

【符号の説明】[Explanation of symbols]

１ ボイラ本体 ２ バーナー風箱 ３ バーナー ４ 火炉 ５ 炉壁 ６ 開口 ７，２１ バーナーノズル 7a 先端 ８ 一次ノズル ９ 二次ノズル １０ リブ 10a 先端 １１，２２ 先端部 １２，２３ 本体部 １３，２４ 二重環部材 １４ ボルト 14a,14b ねじ部 １５ ナット １６ 放熱フィン １７,25b,26b 貫通穴 ２５ 内筒部 25a 部位 ２６ 外筒部 26a 部位 DESCRIPTION OF SYMBOLS 1 Boiler main body 2 Burner wind box 3 Burner 4 Furnace 5 Furnace wall 6 Opening 7, 21 Burner nozzle 7a Tip 8 Primary nozzle 9 Secondary nozzle 10 Rib 10a Tip 11,22 Tip 12,23 Main body 13,24 Double ring Member 14 Bolt 14a, 14b Thread 15 Nut 16 Radiation fin 17, 25b, 26b Through hole 25 Inner cylinder 25a part 26 Outer cylinder part 26a part

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 内筒と外筒とからなるバーナーノズルに
おいて、先端部を分割して本体部と二重円環部材とし、
二重円環部材を相対的に周方向に移動可能に連結部材に
より本体部に取り付けたことを特徴とするバーナーノズ
ル。1. A burner nozzle comprising an inner cylinder and an outer cylinder, wherein a tip portion is divided into a main body portion and a double annular member,
A burner nozzle wherein a double annular member is attached to a main body by a connecting member so as to be relatively movable in a circumferential direction. 【請求項２】 内筒と外筒とからなり、内筒と外筒との
間にリブを設けたバーナーノズルにおいて、先端部を分
割して本体部と二重円環部材とし、二重円環部材を相対
的に周方向に移動可能に連結部材により本体部に取り付
けたことを特徴とするバーナーノズル。2. A burner nozzle comprising an inner cylinder and an outer cylinder, wherein a rib is provided between the inner cylinder and the outer cylinder. A burner nozzle, wherein a ring member is attached to a main body by a connecting member so as to be relatively movable in a circumferential direction. 【請求項３】 内筒と外筒とからなり、内筒と外筒との
間にリブを設けたバーナーノズルにおいて、先端部を分
割して本体部と二重円環部材とし、更に、二重円環部材
を内筒部と外筒部とに分割し、連結部材により内筒部と
外筒部とを本体部に取り付けて内筒部と外筒部と本体部
とを相対的に周方向に移動可能にして二重円環部材を本
体部に取り付けたことを特徴とするバーナーノズル。3. A burner nozzle comprising an inner cylinder and an outer cylinder, in which a rib is provided between the inner cylinder and the outer cylinder, a tip portion is divided into a main body portion and a double annular member. The heavy annular member is divided into an inner cylinder portion and an outer cylinder portion, and the inner cylinder portion and the outer cylinder portion are attached to the main body portion by a connecting member, and the inner cylinder portion, the outer cylinder portion, and the main body portion are relatively circumferentially mounted. A burner nozzle characterized in that a double annular member is attached to a main body so as to be movable in a direction. 【請求項４】 請求項２もしくは請求項３において、リ
ブを先端から後退させて内筒と外筒との間に設けたこと
を特徴とするバーナーノズル。4. The burner nozzle according to claim 2, wherein the rib is retracted from the tip and provided between the inner cylinder and the outer cylinder. 【請求項５】 請求項１乃至請求項４のいずれか１項に
おいて、二重円環部材の内側に放熱フィンを設けたこと
を特徴とするバーナーノズル。5. The burner nozzle according to claim 1, wherein a radiation fin is provided inside the double annular member. 【請求項６】 内筒と外筒とからなるバーナーノズルに
おいて、先端部の内筒の外側及び外筒の内側にそれぞれ
放熱フィンを設けたことを特徴とするバーナーノズル。6. A burner nozzle comprising an inner cylinder and an outer cylinder, wherein radiation fins are provided on the outer side of the inner cylinder and on the inner side of the outer cylinder at the tip.
JP2001049667A 2001-02-26 2001-02-26 Burner nozzle Expired - Fee Related JP3897534B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001049667A JP3897534B2 (en) 2001-02-26 2001-02-26 Burner nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001049667A JP3897534B2 (en) 2001-02-26 2001-02-26 Burner nozzle

Publications (2)

Publication Number Publication Date
JP2002250509A true JP2002250509A (en) 2002-09-06
JP3897534B2 JP3897534B2 (en) 2007-03-28

Family

ID=18910737

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001049667A Expired - Fee Related JP3897534B2 (en) 2001-02-26 2001-02-26 Burner nozzle

Country Status (1)

Country Link
JP (1) JP3897534B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016093022A1 (en) * 2014-12-10 2016-06-16 旭硝子株式会社 Burner for glass melting, glass melting furnace, method for melting glass and method for producing glass
US10619847B2 (en) * 2014-12-15 2020-04-14 Edwards Limited Effluent gas inlet assembly for radiant burner
JP2021127870A (en) * 2020-02-14 2021-09-02 ボルカノ株式会社 Throat member and contraction flow swirler for burner device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016093022A1 (en) * 2014-12-10 2016-06-16 旭硝子株式会社 Burner for glass melting, glass melting furnace, method for melting glass and method for producing glass
JPWO2016093022A1 (en) * 2014-12-10 2017-10-05 旭硝子株式会社 Glass melting burner, glass melting furnace, glass melting method and glass manufacturing method
US10619847B2 (en) * 2014-12-15 2020-04-14 Edwards Limited Effluent gas inlet assembly for radiant burner
JP2021127870A (en) * 2020-02-14 2021-09-02 ボルカノ株式会社 Throat member and contraction flow swirler for burner device

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