JPH10274403A - Pulverized fuel combustion burner - Google Patents

Pulverized fuel combustion burner

Info

Publication number
JPH10274403A
JPH10274403A JP8020097A JP8020097A JPH10274403A JP H10274403 A JPH10274403 A JP H10274403A JP 8020097 A JP8020097 A JP 8020097A JP 8020097 A JP8020097 A JP 8020097A JP H10274403 A JPH10274403 A JP H10274403A
Authority
JP
Japan
Prior art keywords
fuel
burner
furnace
pulverized
air
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
JP8020097A
Other languages
Japanese (ja)
Other versions
JP3664837B2 (en
Inventor
Akiyasu Okamoto
章泰 岡元
Original Assignee
Mitsubishi Heavy Ind Ltd
三菱重工業株式会社
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 Ind Ltd, 三菱重工業株式会社 filed Critical Mitsubishi Heavy Ind Ltd
Priority to JP08020097A priority Critical patent/JP3664837B2/en
Publication of JPH10274403A publication Critical patent/JPH10274403A/en
Application granted granted Critical
Publication of JP3664837B2 publication Critical patent/JP3664837B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a pulverized combustion burner which lowers the height of a burner and thereby prevent slag from deposited on a furnace wall. SOLUTION: A pulverized combustion burner comprises a burner which widths its breadth and lower its height and executes high heating load combustion of a fuel in a small area, an additional air port with is separately placed thereupon, a twisting board which is laid out in a pulverized pipeline and shifts a pulverized fuel to the inner size of the furnace and a fuel secondary air injection opening 9 which has enlarged the opening areas close to a furnace side wall and executes a high heating load combustion which burns the fuel in a small area by winding the breadth of the burner and lowering the height. In addition to that, an additional air port 14 above the burner is laid out so as to reduce the generation of NO1 at the burner. Furthermore, the pulverized fuel is shifted to the inner side of the furnace with the twisting plate 12 in the pulverized fuel pipeline while the fuel secondary air injection opening is opened close to the furnace side wall so as to widen the opening area and increase the amount of air close to the furnace side wall, which raises the melting point of the slug (molten ash) and prevents the molten ashes from being deposited on the furnace wall due to high heating load.

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】本発明は発電事業用、または
自家発電用等のボイラにおいて、微粉状燃料の燃焼バー
ナに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion burner for pulverized fuel in a boiler for a power generation business or a private power generation.
【0002】[0002]
【従来の技術】従来のものについて図2に基づいて説明
する。同図2(a)はボイラの断面を示し、(b)は
(a)の四隅に配置されるバーナ風箱を示し、(c)は
(b)の燃料ノズルの一つの正面を示し、また(d)は
(c)の燃料ノズルへ燃料を供給する微粉燃料管を示し
ている。
2. Description of the Related Art A conventional device will be described with reference to FIG. 2A shows a cross section of the boiler, FIG. 2B shows burner-like boxes arranged at four corners of FIG. 2A, FIG. 2C shows the front of one of the fuel nozzles of FIG. (D) shows a fine powder fuel pipe for supplying fuel to the fuel nozzle of (c).
【0003】図2(a)において、1 は火炉断面で、周
囲を炉壁で方形に囲まれ、その四隅にはそれぞれバーナ
風箱2を配設している。3は火炎を示し、また4は炉壁
近傍区域を示している。
[0003] In Fig. 2 (a), reference numeral 1 denotes a furnace section, which is surrounded by a furnace wall in a square shape, and a burner-like box 2 is disposed at each of the four corners. Reference numeral 3 indicates a flame, and reference numeral 4 indicates an area near the furnace wall.
【0004】図2(b)は前記バーナ風箱2の詳細で、
5段構成のものを示している。即ち、上下端に補助空気
部5b,5aを配置し、下端の補助空気部5aの上に第
1段燃料ノズル部6aを置き、これにオイルノズル部7
aを介して第2段燃料ノズル部6bを配置し、同様にオ
イルノズル部7bを介して第3段燃料ノズル部6c,オ
イルノズル部7cを介して第4段燃料ノズル部6d,更
にオイルノズル部7dを介して第5段燃料ノズル部6
e、そして上端の補助空気部5bまでそれぞれの間に隙
間を置かず順序良く積み重ねた構造となっている。
FIG. 2B shows the details of the burner-like box 2.
A five-stage configuration is shown. That is, the auxiliary air portions 5b and 5a are arranged at the upper and lower ends, the first-stage fuel nozzle portion 6a is placed on the auxiliary air portion 5a at the lower end, and the oil nozzle portion 7
a, a second-stage fuel nozzle 6b is disposed via the oil nozzle 7b, a third-stage fuel nozzle 6c is disposed via the oil nozzle 7c, and a fourth-stage fuel nozzle 6d is further disposed via the oil nozzle 7c. 5th stage fuel nozzle section 6 through section 7d
e, and the auxiliary air portion 5b at the upper end is stacked in order without any gap.
【0005】そして、この積み重ね体の中から、ハッチ
ッングした第5段燃料ノズル部6eに着目してその正面
形状を図2(c)に示すと、同第5段燃料ノズル部6e
は、中央に配置されて微粉燃料と搬送用空気を噴出する
燃料噴出口8と、その周囲をとりまいて2次空気を噴出
する燃料2次空気噴出口9とで構成されている。
[0005] From the stacked body, paying attention to the hatched fifth-stage fuel nozzle portion 6e, its front shape is shown in FIG. 2 (c).
Is composed of a fuel outlet 8 disposed at the center for ejecting fine fuel and carrier air, and a fuel secondary air outlet 9 surrounding the periphery and ejecting secondary air.
【0006】なお、他の燃料ノズル部6a〜6dも前記
第5段燃料ノズル部6eと同様に構成されていることは
勿論である。また、前記燃料噴出口8から噴出する微粉
燃料と搬送用空気は、図2(d)に示す微粉燃料管10
を経て搬送され、同燃料噴出口8に至るものである。
It is needless to say that the other fuel nozzles 6a to 6d are configured similarly to the fifth stage fuel nozzle 6e. Further, the fine fuel and the carrier air ejected from the fuel ejection port 8 are supplied to the fine fuel pipe 10 shown in FIG.
, And reaches the fuel injection port 8.
【0007】[0007]
【発明が解決しようとする課題】前記した従来のもので
は、第1段〜第5段燃料ノズル部6a〜6eが規則正し
く積み重ねられて配列されているために、バーナ風箱2
の部分で空気量を絞りきれず、その結果として十分な空
気のある雰囲気において燃焼が進ことから、ここで発生
するNOX 値が非常に高いものであった。
In the prior art described above, the first to fifth stage fuel nozzle portions 6a to 6e are regularly stacked and arranged.
Since the air amount could not be reduced in the portion of, the combustion proceeded in an atmosphere with sufficient air, and the NO X value generated here was very high.
【0008】そこでこの高NOX 値を低下するべく、炉
の上部に追加空気ポートを設置して空気量を分散し、バ
ーナ風箱2の部分での空気量を減少させる試みがなされ
るが、火炉全体の高さが高いものとなり、コスト増にな
るという不具合が目立つ結果となるものである。
In order to reduce the high NO X value, an attempt is made to reduce the amount of air in the burner wind box 2 by installing an additional air port at the top of the furnace to disperse the amount of air. The height of the furnace as a whole is high, and the disadvantage of increased costs is noticeable.
【0009】また、火炉全体の高さを抑えようとして、
バーナ高さを低くするとバーナ部の熱負荷が高くなり、
炉壁へのスラグ(溶融灰)の付着が増加し、伝熱・燃焼
障害等を引き起こすこととなり、種々の創意工夫を重ね
るものの、実用性に富んだ好ましものを得るに至ってい
ない状況にある。
Also, in an attempt to reduce the height of the entire furnace,
Lowering the burner height increases the heat load on the burner,
Adhesion of slag (molten ash) to the furnace wall will increase, causing heat transfer and combustion failure, etc., and despite various ingenuity, it is not yet possible to obtain a practically desirable one. .
【0010】本発明は従来のものにおけるこのような状
況に鑑みてなされ、バーナ部の抱える前記の諸問題点を
解消し、実用性の高い好適なバーナ部を提供することを
課題とするものである。
SUMMARY OF THE INVENTION The present invention has been made in view of such a situation in the related art, and has as its object to solve the above-mentioned problems of the burner portion and to provide a suitable burner portion with high practicality. is there.
【0011】[0011]
【課題を解決するための手段】本発明は前記した課題を
解決するべくなされたもので、横幅を広げるとともに高
さを低くし狭い領域で燃料の高熱負荷燃焼を行うバーナ
と、その上方に配置された別置きの追加空気ポートと、
微粉燃料管内に配置され微粉燃料を炉の内側に偏らせる
ひねり板と、炉壁側寄りの開口面積を大きくして同炉壁
側寄りの空気量を増やす燃料二次空気噴射口とを有して
なる微粉状燃料燃焼バーナを提供し、バーナの横幅を広
げることに対応してバーナの高さを低くし、これにより
狭い領域で燃料を燃やす高熱負荷燃焼を行わせ、バーナ
の上方に別置きの追加空気ポートを配置してバーナ部で
のNOX 発生を低減させ、更に、微粉燃料管内に配置し
たひねり板で微粉燃料を炉の内側に偏らせるとともに、
燃料二次空気噴射口を炉壁側寄りで開口面積を大きくし
て炉壁側寄りの空気量を増やすことにより、スラグ(溶
融灰)の融点を上昇させて前記高熱負荷による炉壁への
溶融灰の付着を防ぐようにしたものである。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a burner which expands the width and lowers the height to perform high-heat load combustion of fuel in a narrow area, and is disposed above the burner. A separate additional air port,
It has a twist plate arranged in the fine fuel pipe to bias the fine fuel toward the inside of the furnace, and a fuel secondary air injection port for increasing the opening area near the furnace wall and increasing the amount of air near the furnace wall. The burner height is reduced in response to the increase in the width of the burner, thereby performing high heat load combustion that burns fuel in a narrow area and separately placed above the burner. additional air port arranged to reduce the NO X generation of the burner section, further, it causes bias the pulverized fuel to the inside of the furnace twisting plate disposed in the pulverized fuel pipe,
By increasing the opening area of the fuel secondary air injection port closer to the furnace wall and increasing the amount of air closer to the furnace wall, the melting point of the slag (molten ash) is raised and the high heat load melts the furnace wall. This is to prevent the adhesion of ash.
【0012】[0012]
【発明の実施の形態】本発明の実施の1形態を図1に基
づいて説明する。なお同図1(a)はボイラの断面を示
し、(b)は(a)の四隅に配置されるバーナ風箱とそ
の上方に配置した別置きの追加空気ポートを示し、
(c)は(b)の燃料ノズルの一つの正面を示し、また
(d)は(c)の燃料ノズルへ燃料を供給する微粉燃料
管を示している。また前記した従来のものと同一の部分
については、図中同一の符号を付して示し、重複する説
明は省略する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. 1A shows a cross section of the boiler, and FIG. 1B shows a burner-like box arranged at the four corners of FIG.
(C) shows the front of one of the fuel nozzles in (b), and (d) shows a fine powder fuel pipe for supplying fuel to the fuel nozzle in (c). Also, the same parts as those of the above-described conventional one are denoted by the same reference numerals in the drawings, and redundant description will be omitted.
【0013】本実施の形態においても前記従来のものと
同様に周囲を炉壁で方形に囲まれた火炉断面1は、その
四隅にそれぞれバーナ風箱2を配設しているが、ここに
配置されるバーナの腰部である第1段〜第5段燃料ノズ
ル部6a〜6e、およびその間に配設された各オイルノ
ズル部7a〜7dは、横幅を広げるとともに高さを低く
して構成されている。
In the present embodiment, the furnace section 1 whose periphery is squarely surrounded by furnace walls is provided with burner-like boxes 2 at the four corners similarly to the above-mentioned conventional one. The first to fifth fuel nozzle portions 6a to 6e, which are the waist portions of the burners, and the oil nozzle portions 7a to 7d disposed therebetween are configured to have a wider width and a lower height. I have.
【0014】例えば従来一般の燃料ノズル部では、横幅
は高さの1〜1.5倍に作られるものであるが、本実施
の形態のものでは、横幅を高さの約3倍にした形状と
し、このように横幅を広げたことに応じて高さを低く
し、5段に積み重ねた全体の高さ寸法を低くしている。
For example, in the conventional general fuel nozzle portion, the width is made 1 to 1.5 times the height, but in the present embodiment, the width is made about 3 times the height. The height is reduced in accordance with the increase in the width in this manner, and the overall height dimension of the five stacked layers is reduced.
【0015】そしてこの5段に積み重ねて構成したバー
ナ風箱2の上方には、追加空気ポート14を設け、同追
加空気ポート14の設置位置は、従来の一般の燃料ノズ
ル部の最上部のものが配置されるとほぼ同じ高さの位置
となっている。
An additional air port 14 is provided above the burner-like box 2 formed by stacking in five stages, and the installation position of the additional air port 14 is located at the top of a conventional general fuel nozzle. Are located at approximately the same height.
【0016】また、この積み重ね体の中でハッチッング
した第5段燃料ノズル部6eは、その正面形状を図1
(c)に示すように、内側に配置されて微粉燃料と搬送
用空気を噴出する燃料噴出口8と、その周囲をとりまい
て2次空気を噴出する燃料2次空気噴出口9とで構成さ
れているが、内側の燃料噴出口8はこれをとりまく燃料
2次空気噴出口9の中で図で見て右寄りに偏倚してい
る。
The front-end shape of the fifth-stage fuel nozzle portion 6e hatched in the stack is shown in FIG.
As shown in FIG. 1C, a fuel outlet 8 is provided inside and ejects fine fuel and carrier air, and a fuel secondary air outlet 9 surrounds the periphery and ejects secondary air. However, the fuel outlet 8 on the inner side is deviated rightward in the fuel secondary air outlet 9 surrounding the fuel outlet 8 as viewed in the drawing.
【0017】これは即ち、炉壁寄りで燃料2次空気噴出
口9の開口部が広く、その分中央寄りが狭くなり、炉壁
寄りの空気面積を大きくして炉壁近傍に燃料2次空気が
より多く噴出し、中央寄りとなる火炎3より炉壁寄り
で、炉壁近傍区域4内に希薄燃料火炎11を形成するよ
うになっている。
That is, the opening of the fuel secondary air outlet 9 is wide near the furnace wall, the center is narrowed accordingly, the air area near the furnace wall is increased, and the fuel secondary air Are blown out more, and a lean fuel flame 11 is formed in the furnace wall vicinity area 4 closer to the furnace wall than the flame 3 near the center.
【0018】また、前記燃料噴出口8に微粉燃料と搬送
用空気を供給する微粉燃料管10の内部には、前記微粉
燃料と搬送用空気の流れがカーブする内側にブロック1
3を配置し、前記微粉燃料等を遠心力で上方、外側へと
偏らせ、これに次いで配置したひねり板12により流れ
を90°ひねって微粉燃料の濃度の高いものが炉の内側
に寄り、炉壁近傍の濃度は低減するようにしている。
A block 1 is provided inside the fine fuel pipe 10 for supplying the fine fuel and the carrier air to the fuel injection port 8 so that the flow of the fine fuel and the carrier air is curved.
3 and the fine fuel or the like is biased upward and outward by centrifugal force, and then the flow is twisted by 90 ° by the twist plate 12 disposed there, so that the one having a high concentration of the fine fuel moves toward the inside of the furnace, The concentration near the furnace wall is reduced.
【0019】本実施の形態は前記したように構成されて
いるので、第1段〜第5段燃料ノズル部6a〜6eを中
心としていわゆるバーナ部の幅を広げ、かつバーナ高さ
を低くすることにより、微粉状燃料流は火炎からの輻射
の受熱面積を増やして着火を促進するとともに、狭い領
域で燃焼を行い、雰囲気温度を高めて燃焼性を向上させ
るものである。
Since the present embodiment is configured as described above, the width of the so-called burner portion is increased around the first to fifth fuel nozzle portions 6a to 6e and the height of the burner is reduced. Accordingly, the fine powder fuel stream increases the heat receiving area of the radiation from the flame to promote ignition, and burns in a narrow region, thereby raising the ambient temperature and improving the combustibility.
【0020】また、従来一般のバーナ最上段に匹敵する
程度の高さ位置にバーナ部とは別置きの追加空気ポート
14を設置し、全燃焼用空気のほぼ30〜40%程度に
当たる十分な量の空気を投入することにより、前記バー
ナ部を空気不足の還元域とするとともに、バーナ部全体
の高さ低減はバーナ部から追加空気ポート14に至る微
粉燃料や燃焼ガス等の滞留時間を確保することとなり、
着火促進、雰囲気温度高等が相俟って、NOX 還元域を
さらに強化する作用を呈する。
Further, an additional air port 14 is provided separately from the burner at a height level comparable to the uppermost stage of a conventional general burner, and a sufficient amount corresponding to about 30 to 40% of the total combustion air is provided. By supplying the air, the burner section becomes a reduction area where the air is insufficient, and the height reduction of the entire burner section secures the residence time of the fine powder fuel and the combustion gas from the burner section to the additional air port 14. That means
Ignition acceleration, ambient temperature higher the I phase俟, exhibits action to further strengthen the NO X reduction region.
【0021】また、微粉燃料管10の内部に配置したひ
ねり板12およびブロック13は、まずブロック13と
微粉燃料管10の曲がりによる遠心力により、微粉燃料
を微粉燃料管10の断面内で偏らせ、次いでひねり板1
2により濃い領域の微粉燃料をひねり、炉の内側寄りに
噴出することにより炉壁近傍の微粉量を低減し、灰分量
も低減するものである。
The twist plate 12 and the block 13 disposed inside the pulverized fuel pipe 10 first disperse the pulverized fuel in the cross section of the pulverized fuel pipe 10 due to the centrifugal force caused by the bending of the block 13 and the pulverized fuel pipe 10. , Then twist plate 1
By twisting the pulverized fuel in the darker region by 2 and ejecting it toward the inside of the furnace, the amount of fine powder near the furnace wall is reduced and the amount of ash is also reduced.
【0022】さらに、灰分中に鉄分が含まれている場
合、周囲雰囲気が空気不足の状態では、溶融温度の低い
化合物を形成し、付着力も増大することから、広めな開
口面積とした炉壁側の空気量を増大させ、空気が十分な
雰囲気としてこのような化合物の形成を防止するもので
ある。
Furthermore, when iron is contained in the ash, if the ambient atmosphere is in a state of insufficient air, a compound having a low melting temperature is formed and the adhesive force is increased. The amount of air on the side is increased so that the air is in a sufficient atmosphere to prevent the formation of such compounds.
【0023】以上、本発明を図示の実施の形態について
説明したが、本発明はかかる実施の形態に限定されず、
本発明の範囲内でその具体的構造に種々の変更を加えて
よいことはいうまでもない。
Although the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to such embodiments.
It goes without saying that various changes may be made to the specific structure within the scope of the present invention.
【0024】[0024]
【発明の効果】以上本発明による微粉状燃料燃焼バーナ
は、横幅を広げるとともに高さを低くし狭い領域で燃料
の高熱負荷燃焼を行うバーナと、その上方に配置された
別置きの追加空気ポートと、微粉燃料管内に配置され微
粉燃料を炉の内側に偏らせるひねり板と、炉壁側寄りの
開口面積を大きくして同炉壁側寄りの空気量を増やす燃
料二次空気噴射口とを有して構成しているので、バーナ
全体の高さを低くして狭い領域で燃料を燃やす高熱負荷
燃焼を行わせ、上方に配置した別置きの追加空気ポート
で燃焼空気を消費することでバーナ部での燃焼空気を絞
ってNOX 発生を低減させ、更に、ひねり板で微粉燃料
管内で方向づけした微粉燃料を炉の内側に偏らせるとと
もに、炉壁側寄りで開口面積を大きくした燃料二次空気
噴射口で炉壁側寄りの空気量を増やすことにより、スラ
グ(溶融灰)の融点を上昇させて前記高熱負荷による炉
壁への溶融灰の付着を防ぐようにしたものである。
As described above, the pulverized fuel combustion burner according to the present invention has a burner which expands its width and lowers its height to perform high heat load combustion of fuel in a narrow area, and a separate additional air port disposed above the burner. And a twist plate arranged in the pulverized fuel pipe to bias the pulverized fuel toward the inside of the furnace, and a fuel secondary air injection port that increases the opening area near the furnace wall and increases the amount of air near the furnace wall. The burner is constructed by lowering the overall height of the burner to perform high heat load combustion for burning fuel in a narrow area, and consuming combustion air through a separate additional air port located above. squeezing the combustion air in the parts to reduce the NO X generation, further, causes bias the pulverized fuel that is oriented at the pulverized fuel pipe in twisting plate inside the furnace, secondary fuel with an increased opening area at the furnace wall side nearer Close to furnace wall with air injection port By increasing the amount of air is slag by increasing the melting point of the (molten ash) those to prevent the adhesion of molten ash to the furnace wall by the high heat load.
【0025】かくして本発明によれば、バーナの高さを
抑えて製作コストを低減し、また、バーナ部でのNOX
発生を低減するとともに高熱負荷燃焼により燃焼性を促
進して未燃分を低減し、加えて溶融灰を炉壁から脱落し
易くした微粉状燃料燃焼バーナをえることが出来、実用
性が有り、好適な、そして信頼性の高い装置を得ること
が出来たものである。
Thus, according to the present invention, the height of the burner is suppressed to reduce the manufacturing cost, and the NO X in the burner section is reduced.
It is possible to obtain a pulverized fuel combustion burner that reduces the generation and promotes the combustibility by high heat load combustion to reduce the unburned content, and also makes it easier for the molten ash to fall off the furnace wall. A suitable and highly reliable device could be obtained.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の実施の一形態に係わる微粉状燃料燃焼
バーナの概要を示し、(a)はボイラの断面を示し、
(b)は(a)の四隅に配置されるバーナ風箱とその上
方に配置した別置きの追加空気ポートを示し、(c)は
(b)の燃料ノズルの一つの正面を示し、また(d)は
(c)の燃料ノズルへ燃料を供給する微粉燃料管を示し
た説明図。
FIG. 1 shows an outline of a pulverized fuel combustion burner according to an embodiment of the present invention, (a) shows a cross section of a boiler,
(B) shows a burner-like box arranged at the four corners of (a) and additional air ports arranged separately above it, (c) shows the front of one of the fuel nozzles of (b), and (b) (d) is an explanatory view showing a fine powder fuel pipe for supplying fuel to the fuel nozzle of (c).
【図2】従来の微粉状燃料燃焼バーナの概要を示し、
(a)はボイラの断面を示し、(b)は(a)の四隅に
配置されるバーナ風箱を示し、(c)は(b)の燃料ノ
ズルの一つの正面を示し、また(d)は(c)の燃料ノ
ズルへ燃料を供給する微粉燃料管を示した説明図。
FIG. 2 shows an outline of a conventional pulverized fuel combustion burner,
(A) shows the cross section of the boiler, (b) shows the burner-like boxes arranged at the four corners of (a), (c) shows the front of one of the fuel nozzles of (b), and (d) FIG. 3 is an explanatory view showing a fine powder fuel pipe for supplying fuel to a fuel nozzle of FIG.
【符号の説明】[Explanation of symbols]
1 火炉断面 2 バーナ風箱 3 火炎 4 炉壁近傍区域 5a 補助空気部 5b 補助空気部 6a 第1段燃料ノズル部 6b 第2段燃料ノズル部 6c 第3段燃料ノズル部 6d 第4段燃料ノズル部 6e 第5段燃料ノズル部 7a オイルノズル部 7b オイルノズル部 7c オイルノズル部 7d オイルノズル部 8 燃料噴出口 9 燃料2次空気噴出口 10 微粉燃料管 11 希薄燃料火炎 12 ひねり板 13 ブロック 14 追加空気ポート DESCRIPTION OF SYMBOLS 1 Furnace cross section 2 Burner wind box 3 Flame 4 Area near furnace wall 5a Auxiliary air section 5b Auxiliary air section 6a First stage fuel nozzle section 6b Second stage fuel nozzle section 6c Third stage fuel nozzle section 6d Fourth stage fuel nozzle section 6e Fifth-stage fuel nozzle 7a Oil nozzle 7b Oil nozzle 7c Oil nozzle 7d Oil nozzle 8 Fuel outlet 9 Fuel secondary air outlet 10 Fine fuel tube 11 Lean fuel flame 12 Twist plate 13 Block 14 Additional air port

Claims (1)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 横幅を広げるとともに高さを低くし狭い
    領域で燃料の高熱負荷燃焼を行うバーナと、その上方に
    配置された別置きの追加空気ポートと、微粉燃料管内に
    配置され微粉燃料を炉の内側に偏らせるひねり板と、炉
    壁側寄りの開口面積を大きくして同炉壁側寄りの空気量
    を増やす燃料二次空気噴射口とを有してなることを特徴
    とする微粉状燃料燃焼バーナ。
    1. A burner which expands its width and lowers its height to burn a fuel under a high heat load in a narrow area, a separate additional air port disposed above the burner, and a pulverized fuel pipe disposed in a pulverized fuel pipe. A fine powder characterized by having a twist plate biased toward the inside of the furnace, and a fuel secondary air injection port that increases the opening area near the furnace wall to increase the amount of air near the furnace wall. Fuel burner.
JP08020097A 1997-03-31 1997-03-31 Pulverized fuel combustion burner Expired - Fee Related JP3664837B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP08020097A JP3664837B2 (en) 1997-03-31 1997-03-31 Pulverized fuel combustion burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP08020097A JP3664837B2 (en) 1997-03-31 1997-03-31 Pulverized fuel combustion burner

Publications (2)

Publication Number Publication Date
JPH10274403A true JPH10274403A (en) 1998-10-13
JP3664837B2 JP3664837B2 (en) 2005-06-29

Family

ID=13711754

Family Applications (1)

Application Number Title Priority Date Filing Date
JP08020097A Expired - Fee Related JP3664837B2 (en) 1997-03-31 1997-03-31 Pulverized fuel combustion burner

Country Status (1)

Country Link
JP (1) JP3664837B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008121924A (en) * 2006-11-09 2008-05-29 Mitsubishi Heavy Ind Ltd Burner structure
JP2013108731A (en) * 2011-11-24 2013-06-06 Mitsubishi Heavy Ind Ltd Pulverized coal burner
JP2013113501A (en) * 2011-11-29 2013-06-10 Mitsubishi Heavy Ind Ltd Burner and boiler with the same
CN103216821A (en) * 2013-04-27 2013-07-24 东方电气集团东方锅炉股份有限公司 Multi-stage stratified combustion system and method for primary air and secondary air of boiler
JP2016118329A (en) * 2014-12-19 2016-06-30 三菱日立パワーシステムズ株式会社 Combustion burner and boiler
CN109028039A (en) * 2018-08-01 2018-12-18 哈尔滨锅炉厂有限责任公司 Coal dust depth concentration device and combustion method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008121924A (en) * 2006-11-09 2008-05-29 Mitsubishi Heavy Ind Ltd Burner structure
US8302544B2 (en) 2006-11-09 2012-11-06 Mitsubishi Heavy Industries, Ltd. Burner structure
JP2013108731A (en) * 2011-11-24 2013-06-06 Mitsubishi Heavy Ind Ltd Pulverized coal burner
JP2013113501A (en) * 2011-11-29 2013-06-10 Mitsubishi Heavy Ind Ltd Burner and boiler with the same
CN103216821A (en) * 2013-04-27 2013-07-24 东方电气集团东方锅炉股份有限公司 Multi-stage stratified combustion system and method for primary air and secondary air of boiler
CN103216821B (en) * 2013-04-27 2015-02-18 东方电气集团东方锅炉股份有限公司 Multi-stage stratified combustion system and method for primary air and secondary air of boiler
JP2016118329A (en) * 2014-12-19 2016-06-30 三菱日立パワーシステムズ株式会社 Combustion burner and boiler
CN109028039A (en) * 2018-08-01 2018-12-18 哈尔滨锅炉厂有限责任公司 Coal dust depth concentration device and combustion method
CN109028039B (en) * 2018-08-01 2019-09-13 哈尔滨锅炉厂有限责任公司 Coal dust depth concentration device and combustion method

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