JPH04165204A - Burner - Google Patents
BurnerInfo
- Publication number
- JPH04165204A JPH04165204A JP2290918A JP29091890A JPH04165204A JP H04165204 A JPH04165204 A JP H04165204A JP 2290918 A JP2290918 A JP 2290918A JP 29091890 A JP29091890 A JP 29091890A JP H04165204 A JPH04165204 A JP H04165204A
- Authority
- JP
- Japan
- Prior art keywords
- air
- combustion
- exhaust gas
- wind box
- burner
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims abstract description 61
- 239000007789 gas Substances 0.000 abstract description 30
- 239000000567 combustion gas Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は燃焼装置に係り、特に点火トーチに排ガスの混
入されないフレッシュエアを送給するに好適な燃焼装置
に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a combustion device, and more particularly to a combustion device suitable for supplying fresh air not mixed with exhaust gas to an ignition torch.
（従来の技術）
環境保護に関する規制は、今後盤々厳しくなることが予
想されるが窒素酸化物（Ｎｏ、）、ばいじんの低減対策
なども大きな課題である。(Prior Art) Regulations related to environmental protection are expected to become increasingly strict in the future, and measures to reduce nitrogen oxides (No. 2) and soot and dust are also major issues.
ボイラなと燃焼装置のＮＯ８低減対策の現状としては排
ガス混合法と二段燃焼法が確立されている。前者は、排
ガスの一部を燃焼用空気中に混合させて酸素濃度を薄め
、燃焼温度を下げてＮＯｘの発生を抑制する方法である
。また後者は、燃料を噴射しているバーナ付近からは必
要空気量の８０〜９０％しか供給せずに酸素不足状態で
燃焼させ、この部分の温度を抑制しＮＯｘの発生を低減
し、次にバーナの後流部に設けられたオーバエアポート
（以下ＯＡＰと略記する）がら不足分の空気を供給して
完全燃焼を図るものである。他に低ＮＯｘバーナ等の事
例もあるがここでは割愛する。Currently, the exhaust gas mixing method and the two-stage combustion method have been established as measures to reduce NO8 in boilers and combustion equipment. The former is a method in which a portion of the exhaust gas is mixed into combustion air to dilute the oxygen concentration and lower the combustion temperature to suppress the generation of NOx. The latter also supplies only 80 to 90% of the required amount of air from the vicinity of the burner where the fuel is injected, causing combustion in an oxygen-deficient state, suppressing the temperature in this area and reducing the generation of NOx. An over air port (hereinafter abbreviated as OAP) provided at the downstream side of the burner supplies air to compensate for the shortage, thereby achieving complete combustion. There are other examples of low NOx burners, but we will omit them here.
第３図は従来技術の燃焼装置における点火トーチ用空気
供給の系統図を示す。押込ファン９からの空気は、予め
バーナ用燃焼空気２と二段燃焼用空気３とに分流しそれ
ぞれ風箱１３．１４に入る。FIG. 3 shows a system diagram of the air supply for the ignition torch in a prior art combustion device. Air from the forced fan 9 is divided in advance into burner combustion air 2 and two-stage combustion air 3 and enters the wind boxes 13 and 14, respectively.
一方、ボイラ節炭器５の出口燃焼排ガス１２は排ガス再
循環ファン１によってバーナ排ガス再循環ライン６を経
由して送られバーナ用燃焼空気２に混合されている。ま
たこの燃焼排ガス１２は、火炉ホッパ排ガス再循環ライ
ン７を経て火炉５０の炉底からも混合され、再熱蒸気温
度の制御を行なうように配慮されている。二段燃焼用空
気３には、排ガスは混合されずＯＡＰ用風箱１３へ導入
される。On the other hand, the outlet combustion exhaust gas 12 of the boiler economizer 5 is sent via the burner exhaust gas recirculation line 6 by the exhaust gas recirculation fan 1 and mixed with the combustion air 2 for the burner. The combustion exhaust gas 12 is also mixed from the bottom of the furnace 50 via the furnace hopper exhaust gas recirculation line 7, so that the temperature of the reheated steam can be controlled. The second-stage combustion air 3 is introduced into the OAP wind box 13 without being mixed with exhaust gas.
従来技術の点火トーチ用燃焼空気４は、点火トーチの着
火性向上のため、フレッシュエアは点火トーチ用燃焼空
気ファン８またはシールエアファン等の単独に設けた専
用ファンによって供給されている。In the conventional combustion air 4 for the ignition torch, fresh air is supplied by an independently provided dedicated fan such as a combustion air fan 8 for the ignition torch or a sealed air fan in order to improve the ignitability of the ignition torch.
（発明が解決しようとする課題）
第３図の従来技術によれば、点火トーチ用燃焼空気の送
給専用に燃焼空気ファン８が必要であり、設備費用及び
運転経費などが嵩み、またファンの信頼性の点や、操作
端の増加、メンテナンス機器の増加など解決を望まれる
問題点があった。(Problems to be Solved by the Invention) According to the prior art shown in FIG. There were problems that needed to be resolved, such as reliability, an increase in the number of control terminals, and an increase in maintenance equipment.
本発明は上記の問題点に鑑み、敢えて点火トーチ専用フ
ァン８を設けることなく、点火トーチにフレッシュエア
の供給が可能で、かつ低ＮＯｘ燃焼に好適な点火トーチ
用空気供給装置を提供することを目的としている。In view of the above-mentioned problems, it is an object of the present invention to provide an air supply device for an ignition torch that is capable of supplying fresh air to the ignition torch without daring to provide a dedicated fan 8 for the ignition torch, and is suitable for low NOx combustion. The purpose is
（課題を解決するための手段）
上記の目的は、ＯＡＰへの二段燃焼用空気ライン３また
はＯＡＰ用風箱１３から点火トーチへ空気供給の専用配
管を設けることによって達成される。(Means for Solving the Problem) The above object is achieved by providing a dedicated piping for supplying air from the two-stage combustion air line 3 to the OAP or the OAP wind box 13 to the ignition torch.
（作用）
上記の構成により、ＯＡＰへの二段燃焼用空気ラインか
ら、若しくはＯＡＰ用風箱１３内からの燃焼用空気ドラ
フトは、火炉ドラフトと比較して一般的に５０〜２５０
ｍｍ（水柱）程度高いので、風箱１３または１４から点
火トーチへの空気供給配管を設けることによって、押込
ファン９を出たフレッシュエアを点火トーチ用燃焼空気
として供給することが可能である。さらに、火炉ドラフ
トが高くなるにつれて、ＯＡＰ用の空気ドラフトも高く
なる特徴を有するから、前記空気供給の専用配管のサイ
ズやルートを最適化することによって、点火トーチの燃
焼用空気源として専用のファンを設ける必要がなくなる
。(Function) With the above configuration, the combustion air draft from the two-stage combustion air line to the OAP or from inside the OAP wind box 13 is generally 50 to 250 compared to the furnace draft.
mm (water column), so by providing an air supply pipe from the wind box 13 or 14 to the ignition torch, it is possible to supply the fresh air coming out of the forced fan 9 as combustion air for the ignition torch. Furthermore, as the furnace draft increases, the OAP air draft also increases, so by optimizing the size and route of the dedicated air supply piping, a dedicated fan can be used as the combustion air source for the ignition torch. There is no need to provide
（実施例） 本発明の実施例の全体構成を第１図を用いて説明する。(Example) The overall configuration of an embodiment of the present invention will be explained using FIG. 1.
第１図はＮＯｘ低減対策として確立されている排ガス混
合法と二段燃焼法の空気ラインに本発明の燃焼装置を適
用した一実施例の空気系統を示す図である。FIG. 1 is a diagram showing an air system of an embodiment in which the combustion apparatus of the present invention is applied to an air line of the exhaust gas mixing method and the two-stage combustion method, which are established as NOx reduction measures.
第１図において、押込ファン９からの燃焼用空気は、空
気予熱器１０を経て供給管２０と供給管２１に分岐し、
バーナ燃焼用空気２と二段燃焼用空気３として送給され
、それぞれＯＡＰ用風箱１３とバーナ用風箱１４とに送
られる二段燃焼ラインを形成している。燃焼排ガス１２
は、排ガス再循環ファン１によって循環し、バーナ排ガ
ス再循環ライン６によってバーナ燃焼空気２と混合され
、また、火炉ホッパ排ガス再循環ライン７を経由して火
炉５０の炉底へも供給する排ガス混合ラインを形成する
。ＯＡＰに供給される二段燃焼用空気３は、排ガスを混
合せずにフレッシュエアのまま供給し、ＯＡ、Ｐ川風箱
１３からの噴出速度や拡がりによって火炉５０内で燃焼
ガスと混合される。In FIG. 1, combustion air from a forced fan 9 passes through an air preheater 10 and branches into a supply pipe 20 and a supply pipe 21.
The air is sent as burner combustion air 2 and second-stage combustion air 3, forming a two-stage combustion line that is sent to an OAP wind box 13 and a burner wind box 14, respectively. Combustion exhaust gas 12
is an exhaust gas mixture that is circulated by the exhaust gas recirculation fan 1, mixed with the burner combustion air 2 by the burner exhaust gas recirculation line 6, and also supplied to the bottom of the furnace 50 via the furnace hopper exhaust gas recirculation line 7. form a line. The second-stage combustion air 3 supplied to the OAP is supplied as fresh air without mixing with exhaust gas, and is mixed with combustion gas in the furnace 50 depending on the ejection speed and spread from the OA and P river wind boxes 13. .
本実施例の点火トーチ用の燃焼空気３の特徴は、（ａ）
点火トーチそのものの全体に占める入熱が少ないからＮ
Ｏｘに及ぼす影響が小さいこと、（ｂ）排ガスを混合し
て着火性を向上させるバーナ用燃焼空気２とは相違して
、ｏ１構成の高いフレッシュエアとすることが必要であ
ること、（ｃ）火炉５０への燃料投入後は空気予熱器１
０によって加熱された熱空気が二段燃焼用空気３へも供
給されるため、点火トーチには好ましい空気条件となる
こと等が挙げられ、これらを考慮して、二段燃焼用空気
３と火炉５０のドラフト差を活用して、バーナ風箱への
供給管２０、点火トーチへの専用配管２２を経て、第２
図に示ずように各点火トーチ用燃焼空気配管１６へ連結
され、さらに風箱１４内で点火トーチ１５と接続されて
いる。The characteristics of the combustion air 3 for the ignition torch of this embodiment are (a)
N because the heat input to the entire ignition torch itself is small.
(b) It is necessary to use fresh air with a high o1 composition, unlike the burner combustion air 2, which improves ignitability by mixing exhaust gas. (c) After charging fuel to the furnace 50, the air preheater 1
Since the hot air heated by the second stage combustion air 3 is also supplied to the second stage combustion air 3, the air conditions are favorable for the ignition torch. Utilizing the draft difference of 50, the second
As shown in the figure, it is connected to the combustion air piping 16 for each ignition torch, and further connected to the ignition torch 15 within the wind box 14.
点火トーチ用燃焼空気配’１１６はＯＡＰ用風箱ｌ：３
から点火トーチ１５と接続してもよい。Combustion air arrangement for ignition torch '116 is OAP wind box l:3
It may also be connected to the ignition torch 15 from above.
＋！求項２記載の［点火トーチへ送給する熱空気温度を
風箱内雰囲気温度と概ね等しい温度に維持する手段」と
は、例えば点火トーチに空気を供給する専用送給配管を
バーナ用風箱１４中に配設することにより、前記専用配
管を高温雰囲気中に保持する構成を意味するものである
。+! ``Means for maintaining the temperature of the hot air supplied to the ignition torch at approximately the same temperature as the atmospheric temperature inside the wind box'' described in claim 2 means, for example, that a dedicated supply pipe for supplying air to the ignition torch is connected to a 14 means a configuration in which the dedicated pipe is maintained in a high-temperature atmosphere.
」−記の通り、空気予熱器１０を経て点火］・−チ１５
に３００℃を超える高温空気を供給できるから、点火ト
ーチ１５の着火ミスが低減すると共に保焔性が向上し、
従来、専用ファンを始めとする他の機器類の使用に付随
するトラブルの発生がなくなりメンテナンスが容易にな
る。” - As described, ignition via air preheater 10 ]・-chi 15
Since it is possible to supply high-temperature air exceeding 300°C to
This eliminates the troubles conventionally associated with the use of dedicated fans and other equipment, making maintenance easier.
（発明の効果）
本発明の実施により、点火トーチ燃焼空気のための専用
ファンを設ける必要がないので、設備費用及び運転経費
、保全経費などが大幅に削減され、また設備全般の信頼
性が向上するなどの顕著な効果を奏するものである。(Effects of the Invention) By implementing the present invention, there is no need to provide a dedicated fan for ignition torch combustion air, so equipment costs, operating costs, maintenance costs, etc. are significantly reduced, and the overall reliability of the equipment is improved. It has remarkable effects such as:
第１図は本発明に係る燃焼装置の一実施例の空気系統を
示す図、第２図は本発明の点火トーチへの接続を示すバ
ーナ用風箱の断面図、第３図は従来技術の空気系統を示
す図である。
１・・・排ガス再循環ファン２・・・バーナ用燃焼空気
３・・・二段燃焼用空気
４・・・点火トーチ用燃焼空気
５・・・節炭器
６・・・バーナ排ガス再循環ライン
７・・・火炉ホッパ排ガス再循環ライン８・・・点火ト
ーチ用燃焼空気ファン
９・・・押込ファン １０・・・空気予熱器１１・
・・排ガス １２・・・燃焼排ガス１３・・・
ＯＡＰ用風箱 １４・・・バーナ用風箱１５・・・点
火トーチ
１６・・・点火トーチ用燃焼空気配管
１７・・エアレジスタ １８・・・ガスバーナ１９・
・・油バーナ
２０・・・バーナ用風箱への供給管
２１・・ＯＡ ））用風箱への供給管
２２・・点火トーチへの専用配管
５０・・・火炉FIG. 1 is a diagram showing the air system of an embodiment of the combustion apparatus according to the present invention, FIG. 2 is a sectional view of a burner wind box showing connection to the ignition torch of the present invention, and FIG. It is a diagram showing an air system. 1... Exhaust gas recirculation fan 2... Combustion air for burner 3... Air for two-stage combustion 4... Combustion air for ignition torch 5... Economizer 6... Burner exhaust gas recirculation line 7 Furnace hopper exhaust gas recirculation line 8 Combustion air fan for ignition torch 9 Forced fan 10 Air preheater 11
...Exhaust gas 12...Combustion exhaust gas 13...
OAP wind box 14... Burner wind box 15... Ignition torch 16... Combustion air piping for ignition torch 17... Air register 18... Gas burner 19...
... Oil burner 20 ... Supply pipe to burner wind box 21 ... OA )) Supply pipe to wind box 22 ... Dedicated piping to ignition torch 50 ... Furnace
Claims (1)
風箱及び二段燃焼用空気風箱の各々へ供給する空気供給
ラインと、前記バーナ用風箱への空気供給ラインに燃焼
排ガスを混入させる排ガス混合ラインとを備える燃焼装
置において、前記二段燃焼用空気風箱への供給ライン若
しくは前記風箱から、点火トーチへ送給する専用配管を
有することを特徴とする燃焼装置。 ２、前記点火トーチへ送給する熱空気温度を風箱内雰囲
気温度と概ね等しい温度に維持する手段を有することを
特徴とする請求項１記載の燃焼装置。[Claims] 1. An air supply line that supplies fresh air via the air preheater to each of the burner wind box and the two-stage combustion air wind box, and an air supply line to the burner wind box. A combustion device comprising an exhaust gas mixing line for mixing combustion exhaust gas, characterized in that the combustion device includes a supply line to the two-stage combustion air wind box or a dedicated piping for feeding air from the wind box to the ignition torch. . 2. The combustion apparatus according to claim 1, further comprising means for maintaining the temperature of the hot air supplied to the ignition torch at approximately the same temperature as the atmospheric temperature within the wind box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2290918A JP2963525B2 (en) | 1990-10-30 | 1990-10-30 | Combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2290918A JP2963525B2 (en) | 1990-10-30 | 1990-10-30 | Combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04165204A true JPH04165204A (en) | 1992-06-11 |
| JP2963525B2 JP2963525B2 (en) | 1999-10-18 |
Family
ID=17762197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2290918A Expired - Fee Related JP2963525B2 (en) | 1990-10-30 | 1990-10-30 | Combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2963525B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001082704A (en) * | 1999-09-09 | 2001-03-30 | Babcock Hitachi Kk | Device and method for burning solid waste |
| US7392752B2 (en) | 2002-12-26 | 2008-07-01 | Hitachi, Ltd. | Solid fuel boiler and method of operating combustion apparatus |
| JP2014500471A (en) * | 2010-11-16 | 2014-01-09 | アルストム テクノロジー リミテッド | Apparatus and method for controlling thermal performance of an oxyfuel boiler |
-
1990
- 1990-10-30 JP JP2290918A patent/JP2963525B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001082704A (en) * | 1999-09-09 | 2001-03-30 | Babcock Hitachi Kk | Device and method for burning solid waste |
| US7392752B2 (en) | 2002-12-26 | 2008-07-01 | Hitachi, Ltd. | Solid fuel boiler and method of operating combustion apparatus |
| JP2014500471A (en) * | 2010-11-16 | 2014-01-09 | アルストム テクノロジー リミテッド | Apparatus and method for controlling thermal performance of an oxyfuel boiler |
| US9752773B2 (en) | 2010-11-16 | 2017-09-05 | General Electric Technology Gmbh | Apparatus and method of controlling the thermal performance of an oxygen-fired boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2963525B2 (en) | 1999-10-18 |
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