JP3029955B2 - Combustion equipment - Google Patents
Combustion equipmentInfo
- Publication number
- JP3029955B2 JP3029955B2 JP5231411A JP23141193A JP3029955B2 JP 3029955 B2 JP3029955 B2 JP 3029955B2 JP 5231411 A JP5231411 A JP 5231411A JP 23141193 A JP23141193 A JP 23141193A JP 3029955 B2 JP3029955 B2 JP 3029955B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- auxiliary air
- coal
- nozzle
- combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Air Supply (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、石炭焚ボイラなどにお
ける燃焼装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus for a coal-fired boiler or the like.
【０００２】[0002]
【従来の技術】図２，図３に従来の典型的な石炭・重油
焚ボイラにおける燃焼装置の全体構成と燃焼状況を示し
ている。従来の燃焼装置では、図２に示すように石炭ノ
ズル、重油ノズル及び補助空気ノズルを共に水平吹き出
しとしたもの、或いは図３に示すようにバーナをチルト
可能とし、バーナ・チルトにより石炭ノズル、重油ノズ
ル及び補助空気ノズルを共に上向き又は下向きになるよ
う全体が同方向に吹き出される構成となっている。2. Description of the Related Art FIGS. 2 and 3 show the general configuration and the state of combustion of a conventional typical coal / heavy oil fired boiler. In the conventional combustion apparatus, the coal nozzle, heavy oil nozzle and auxiliary air nozzle are both horizontally blown out as shown in FIG. 2, or the burner can be tilted as shown in FIG. The whole is blown out in the same direction so that both the nozzle and the auxiliary air nozzle face upward or downward.
【０００３】石炭焚ボイラに於いては、火炉の大きさを
有効に使用した燃焼状況を作り出す事が大切である。図
２に示す様な最下段補助空気ノズルも含めた全段水平吹
き込みでは、火炉下部に火炎のよどみ・旋回炎が充満
し、炉底部が高温となるため炉底部の灰を溶融しクリン
カ・トラブルを起こす可能性が大きい。[0003] In a coal-fired boiler, it is important to create a combustion situation that effectively uses the size of a furnace. As shown in Fig. 2, in the horizontal injection of all stages including the lower auxiliary air nozzle, the lower part of the furnace is filled with flame stagnation and swirl flame, and the furnace bottom becomes hot, so the ash at the bottom of the furnace is melted and clinker trouble occurs. There is a high possibility of causing.
【０００４】また、図３に示す様に、全段バーナ・チル
ト上向きで火炉下部の火炎のよどみの問題を解決しよう
とした場合、燃焼火炎の後燃えにより、火炉上部より火
炉出口まで火炎が巻き上がり火炉出口近傍での灰の溶融
によるクリンカ・トラブル、火炉より飛び出していく煤
塵量の増加の問題等を生じる。この問題は、火炉の大き
さ特に高さの低い中・小容量ボイラ、国内炭等の灰分が
多く軟化点の低いいわゆる低品位炭を焚く場合に、その
傾向が顕著にあらわれやすい。Further, as shown in FIG. 3, in order to solve the problem of stagnation of the flame at the lower part of the furnace with the burner / tilt upward in all stages, the flame is wound from the upper part of the furnace to the furnace outlet due to the afterburning of the combustion flame. Clinker trouble due to melting of the ash near the exit of the ascending furnace, and a problem of an increase in the amount of dust flying out of the furnace occur. This problem tends to be noticeable when a so-called low-grade coal having a large soft ash with a large ash content such as a medium / small-capacity boiler having a particularly small height and a domestic coal has a low softening point.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、燃焼炉サイ
ズを最大限有効に使い、燃焼炉上部への火炎の伸び、煤
塵量の飛散の増大、及び燃焼炉上部でのクリンカ・トラ
ブル無しに安定した燃焼を維持しながら、炉底部の火炎
の持ち上げにより炉底部でのクリンカ・トラブルを解消
し、長期間の連続操業が可能な燃焼装置を提供すること
を課題としている。SUMMARY OF THE INVENTION The present invention makes the most efficient use of the size of the combustion furnace, and eliminates the spread of flame to the upper part of the combustion furnace, the increase of dust scattering, and the clinker trouble at the upper part of the combustion furnace. It is an object of the present invention to provide a combustion device capable of eliminating a clinker trouble at the bottom of the furnace by lifting the flame at the bottom of the furnace while maintaining stable combustion, and enabling long-term continuous operation.
【０００６】[0006]
【課題を解決するための手段】本発明は、前記課題を解
決するため、複数個のバーナと最下段の補助空気ノズル
とを火炉に具えた燃焼装置において、火炉周壁に設けた
前記最下段の補助空気ノズルの先端を上向き固定とし、
他のバーナを水平吹き出しとした燃焼装置を提供する。
本発明による燃焼装置のバーナとしては石炭ノズル、石
炭ノズルと重油ノズル等を具えたものであってよい。According to the present invention, there is provided a combustion apparatus having a plurality of burners and a lowermost auxiliary air nozzle provided on a peripheral wall of a furnace in order to solve the above problems .
The tip of the auxiliary air nozzle of the lowermost and upward fixed,
Provided is a combustion device using another burner as a horizontal blowout.
The burner of the combustion apparatus according to the present invention may include a coal nozzle, a coal nozzle and a heavy oil nozzle.
【０００７】[0007]
【作用】本発明による燃焼装置は前記したように火炉周
壁に設けた最下段の補助空気ノズルだけを先端上向き
（KICK−UPノズル) 固定とし、火炉下部における火炎の
よどみ・旋回炎の充満をこの上向きの最下段補助空気に
より持ち上げる。他のバーナは、水平吹き出しで安定し
た燃焼を維持し火炉上部への火炎の巻き上げを防止す
る。The combustion apparatus according to the action of the present invention the furnace periphery as described above
Only the lowermost auxiliary air nozzle provided on the wall is fixed upward at the tip (KICK-UP nozzle), and the stagnation of flames and the filling of swirling flames at the lower part of the furnace are lifted by this upwardly lowest auxiliary air. Other burners maintain stable combustion with horizontal blows and prevent flames from lifting up the furnace top.
【０００８】このように本発明の採用により、火炉出口
部の温度上昇を押さえ、火炉出口近傍での灰の溶融によ
るクリンカ・トラブル、火炉から飛び出していく煤塵量
の増加を防ぎながら炉底部の滞留炎を無くす事により、
炉底部の温度雰囲気を灰の軟化点以下として、灰をサラ
サラとした状態でクリンカホッパへと落下させる。従っ
て、炉底部の灰は、安定した状態で連続的に排出される
事となり、連続操業阻害の要因となる炉底部、火炉出口
のクリンカ発生が同時に解決される。As described above, by adopting the present invention, the rise in the temperature of the furnace outlet is suppressed, and the clinker trouble due to the melting of the ash near the furnace outlet and the increase in the amount of dust flying out of the furnace are prevented from remaining at the furnace bottom. By eliminating the flame,
The temperature atmosphere at the bottom of the furnace is set to be equal to or lower than the softening point of the ash, and the ash is dropped onto the clinker hopper with the ash being smooth. Therefore, the ash at the bottom of the furnace is continuously discharged in a stable state, and the clinker at the bottom of the furnace and at the exit of the furnace, which causes continuous operation, is simultaneously solved.
【０００９】[0009]
【実施例】以下、本発明による燃焼装置を図１に示した
一実施例に基づいて具体的に説明する。図１において、
１はボイラ火炉、２は石炭ノズル、３は重油ノズル、４
は上段及び中段の補助空気ノズル、５が最下段の補助空
気ノズル（先端上向き）、６は最下段補助空気の流れ、
７は燃焼火炎、８は火炉下部管寄せを示している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a combustion apparatus according to the present invention will be specifically described based on one embodiment shown in FIG. In FIG.
1 is a boiler furnace, 2 is a coal nozzle, 3 is a heavy oil nozzle, 4
Is the upper and middle auxiliary air nozzles, 5 is the lowermost auxiliary air nozzle (upward end), 6 is the lowermost auxiliary air flow,
Reference numeral 7 denotes a combustion flame, and reference numeral 8 denotes a furnace lower header.
【００１０】この図１に示す実施例は石炭・重油の混焼
焚きボイラに本発明を適用した例である。これらの補助
空気ノズル４、石炭ノズル２、重油ノズル３、及び最下
段の補助空気ノズル５は通常のようにボイラ火炉１の側
壁又は各コーナー（火炉の各コーナを含めた側壁を周壁
という）に備えられている。これらの補助空気ノズル
４、石炭ノズル２、その下の重油ノズル３、下段の石炭
ノズル２及び中段の補助空気ノズル４はノズル先端が水
平向きに設けられており、最下段の補助空気ノズル５の
み先端上向き固定としてある。The embodiment shown in FIG. 1 is an example in which the present invention is applied to a co-firing boiler of coal and heavy oil. These auxiliary air nozzles 4, coal nozzles 2, heavy oil nozzles 3, and lowermost auxiliary air nozzles 5 are provided in a usual manner to the side wall or each corner of the boiler furnace 1 (the side wall including each corner of the furnace is a peripheral wall).
) . These auxiliary air nozzles 4, coal nozzles 2, heavy oil nozzles 3 thereunder, lower-stage coal nozzles 2 and middle-stage auxiliary air nozzles 4 are provided with their nozzle tips oriented horizontally, and only the lowermost auxiliary air nozzle 5 is provided. The tip is fixed upward.
【００１１】前述のように構成されたボイラの上，下の
石炭ノズル２より微粉砕された石炭を吹き込み、その
上，下の補助空気ノズル４より補助空気を水平に吹き出
した場合、下側の石炭ノズル２による火炎７のよどみ・
旋回炎の充満は上向きの最下段補助空気ノズル５による
空気により持ち上げられ、最下段補助空気の流れ６のよ
うに安定した燃焼を維持する。また、上側の石炭ノズル
２による火炎７は最上段補助空気ノズル４の水平吹き出
し空気により火炎上部への巻き上げが防止される。When finely pulverized coal is blown from the coal nozzles 2 above and below the boiler constructed as described above, and auxiliary air is horizontally blown out from the auxiliary air nozzles 4 above and below the boiler, Stagnation of flame 7 by coal nozzle 2
The filling of the swirling flame is lifted by air by the upwardly directed lowermost auxiliary air nozzle 5 to maintain stable combustion as in the lowermost auxiliary air flow 6. Further, the flame 7 from the upper coal nozzle 2 is prevented from being wound up to the upper part of the flame by the horizontal blowing air from the uppermost auxiliary air nozzle 4.
【００１２】このように石炭ノズル２、重油ノズル３、
上段及び中段補助空気ノズル４は水平吹き出しとし、火
炉上部への火炎の巻き上げを防止しながら、先端上向き
の最下段補助空気ノズル５の炉底部旋回炎持ち上げ効果
により、炉底のクリンカ・トラブルを解消できる。以
上、本発明を図示した実施例に基づいて具体的に説明し
たが、本発明がこれらの実施例に限定されず特許請求の
範囲に示す本発明の範囲内で、その形状、構造に種々の
変更を加えてよいことはいうまでもない。Thus, the coal nozzle 2, the heavy oil nozzle 3,
The upper and middle auxiliary air nozzles 4 are horizontally blown out to prevent the flame from being raised to the upper part of the furnace, and the clinker trouble at the furnace bottom is eliminated by the effect of raising the furnace bottom swirling flame by the lowermost auxiliary air nozzle 5 facing upward. it can. As described above, the present invention has been specifically described based on the illustrated embodiments. However, the present invention is not limited to these embodiments, and various shapes and structures are included in the scope of the present invention described in the claims. It goes without saying that changes may be made.
【００１３】[0013]
【発明の効果】以上具体的に説明したように、本発明に
よれば燃焼炉サイズを最大限有効に使い、火炉上部への
火炎の伸び、煤塵量の飛散の増大、及び火炉上部のクリ
ンカ・トラブル無しに安定した燃焼を維持しながら、炉
底部の火炎の持ち上げにより炉底部のクリンカ・トラブ
ルを防止、解消することができる。As described above in detail, according to the present invention, the size of the combustion furnace is used to the maximum extent, the expansion of the flame to the upper part of the furnace, the increase of the scattering of dust, and the clinker By raising the flame at the bottom of the furnace, clinker trouble at the bottom of the furnace can be prevented and eliminated while maintaining stable combustion without trouble.
【００１４】従って、本発明によれば連続操業の阻害因
子である炉底部クリンカ・トラブルの解決により画期的
に連続操業期間が延びる。本発明を適用した石炭焚ボイ
ラの一例では、連続操業期間を１ヶ月から１２ヶ月に画
期的に伸ばすことができた。このように本発明をボイラ
に適用すると、同一サイズの火炉に於いて、クリンカ・
トラブル無しに最大限の蒸発量を確保する事が可能とな
り前記石炭ボイラの例では、当初１８０T/H ×１ヶ月連
続操業であったものが本発明適用後２１０T/H×１２ヶ
月連続操業とすることができた。Therefore, according to the present invention, the continuous operation period is drastically extended by solving the clinker trouble at the bottom of the furnace, which is an obstacle to the continuous operation. In an example of the coal-fired boiler to which the present invention is applied, the continuous operation period can be significantly extended from one month to 12 months. As described above, when the present invention is applied to a boiler, in a furnace of the same size,
It is possible to secure the maximum amount of evaporation without any trouble, and in the case of the coal boiler, the operation was initially 180 T / H x 1 month continuous operation, but changed to 210 T / H x 12 months continuous operation after application of the present invention. I was able to.
【図１】本発明の一実施例による燃焼装置を具えた石炭
・重油混焼焚きボイラの概略縦断面図。FIG. 1 is a schematic longitudinal sectional view of a coal-fuel oil-fired boiler provided with a combustion device according to one embodiment of the present invention.
【図２】従来の燃焼装置を具えた石炭・重油混焼焚きボ
イラの概略縦断面図。FIG. 2 is a schematic vertical sectional view of a coal / fuel oil co-firing boiler provided with a conventional combustion device.
【図３】従来の他の燃焼装置を具えた石炭・重油混焼焚
きボイラの概略縦断面図。FIG. 3 is a schematic longitudinal sectional view of a coal / heavy oil co-firing boiler provided with another conventional combustion device.
１ ボイラ火炉 ２ 石炭ノズル ３ 重油ノズル ４ 上段及び中段の補助空気ノズル ５ 最下段の補助空気ノズル ６ 最下段補助空気の流れ ７ 燃焼火炎 ８ 火炉下部管寄せ DESCRIPTION OF SYMBOLS 1 Boiler furnace 2 Coal nozzle 3 Heavy oil nozzle 4 Upper and middle auxiliary air nozzles 5 Lower auxiliary air nozzle 6 Lower auxiliary air flow 7 Combustion flame 8 Furnace lower header
───────────────────────────────────────────────────── フロントページの続き (72)発明者 岡元 章泰 長崎市深堀町５丁目717番１号 三菱重 工業株式会社長崎研究所内 (72)発明者 岩永 鉄男 長崎市飽の浦町１番１号 三菱重工業株 式会社長崎造船所内 (56)参考文献 実開 昭61−144338（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F23L 1/00 F23C 11/00 F23D 1/00 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Akiyasu Okamoto 5-717-1, Fukahori-cho, Nagasaki-shi Mitsubishi Heavy Industries, Ltd. Nagasaki Research Laboratory (72) Inventor Tetsuo Iwanaga 1-1, Akunoura-cho, Nagasaki-shi Mitsubishi Heavy Industries Inside the Nagasaki Shipyard Co., Ltd. (56) References Real Open Sho 61-144338 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F23L 1/00 F23C 11/00 F23D 1/00
Claims (1)
ルとを火炉に具えた燃焼装置において、火炉周壁に設け
た前記最下段の補助空気ノズルの先端を上向き固定と
し、他の前記バーナを水平吹き出しとしたことを特徴と
する燃焼装置。1. A combustion apparatus having a plurality of burners and a lowermost auxiliary air nozzle in a furnace, provided on a peripheral wall of the furnace.
A combustion apparatus wherein the tip of the lowermost auxiliary air nozzle is fixed upward and the other burners are blown out horizontally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5231411A JP3029955B2 (en) | 1993-09-17 | 1993-09-17 | Combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5231411A JP3029955B2 (en) | 1993-09-17 | 1993-09-17 | Combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0791648A JPH0791648A (en) | 1995-04-04 |
| JP3029955B2 true JP3029955B2 (en) | 2000-04-10 |
Family
ID=16923180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5231411A Expired - Fee Related JP3029955B2 (en) | 1993-09-17 | 1993-09-17 | Combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3029955B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101874577B1 (en) | 2016-12-13 | 2018-07-04 | 주식회사 대호시스템 | Sliding window comprising guide member |
-
1993
- 1993-09-17 JP JP5231411A patent/JP3029955B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101874577B1 (en) | 2016-12-13 | 2018-07-04 | 주식회사 대호시스템 | Sliding window comprising guide member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0791648A (en) | 1995-04-04 |
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|---|---|---|---|
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Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20000106 |
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| LAPS | Cancellation because of no payment of annual fees |