JPS62123208A - Low nox duct burner for additional heating - Google Patents
Low nox duct burner for additional heatingInfo
- Publication number
- JPS62123208A JPS62123208A JP26304185A JP26304185A JPS62123208A JP S62123208 A JPS62123208 A JP S62123208A JP 26304185 A JP26304185 A JP 26304185A JP 26304185 A JP26304185 A JP 26304185A JP S62123208 A JPS62123208 A JP S62123208A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- fuel
- combustion
- nozzle
- nox
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/21—Burners specially adapted for a particular use
- F23D2900/21003—Burners specially adapted for a particular use for heating or re-burning air or gas in a duct
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、三段燃焼法を採用し九追焚き用低勤ダクトバ
ーナに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a low duty duct burner for nine-stage firing employing a three-stage combustion method.
従来の技術
ガスタービン等の排ガスの保有熱を例えばボイラに利用
する場合、排ガス温度が低温である九め追焚きが行われ
るが、追焚き用低ＮＯｘダクトバーナとして有効適切な
ものは存在しない。Conventional technology When the heat retained in the exhaust gas of a gas turbine or the like is used in a boiler, for example, reheating is performed in which the exhaust gas temperature is low, but there is no effective and suitable low NOx duct burner for reheating.
発明が解決しようとする問題点
すなわち、追焚き前の排ガス中に現存するＮＯｘと追焚
き時に発生するＮＯｘとが合算されて昇温化された排ガ
ス中のＮＯｘ値が規制値を越える。また排ガスの追焚き
（燃焼）を安定させるためには、１６〜１７％以上の酸
素が必要であるが、排ガスの含有酸素濃度が１４〜１５
％と低く、従って新鮮な空気の補給が必要となる。そし
て大量の空気を供給せんとすると、空気動力が大きくな
シ、また排ガスの圧力損失が大きくなって、ガスタービ
ン等の出力にロスを生じる。The problem to be solved by the invention is that NOx existing in the exhaust gas before reheating and NOx generated during reheating are added together, and the NOx value in the heated exhaust gas exceeds the regulation value. In addition, in order to stabilize the reburning (combustion) of exhaust gas, oxygen of 16 to 17% or more is required, but the oxygen concentration of exhaust gas is 14 to 15%.
%, thus requiring fresh air supplementation. If a large amount of air is supplied, the air power will be large and the pressure loss of the exhaust gas will be large, causing a loss in the output of the gas turbine or the like.
そこで本出願人は、ＮＯｘの発生を抑制すべく、燃料二
段燃焼法を採用した追焚き用低ＮＯｘダクトバーナを提
案した。これは、−次燃料用ノズル及び二次燃料用ノズ
ルを排ガス流路に臨ませて配設し、前記−次燃料用ノズ
ルの近傍にのみ、安定燃焼用空気を送る構成としたもの
であるが、この方法では、排気ガス中のＮＯｘが殆んど
そのま＼還元されることなく排出されるので、ＮＯｘの
発生がある程度抑制されても、追焚き用バーナの下流側
のＮＯｘ量は、上流側の総ＮＯｘ量よシも多くなる。Therefore, in order to suppress the generation of NOx, the present applicant proposed a low NOx duct burner for reheating that employs a two-stage fuel combustion method. This is a structure in which a secondary fuel nozzle and a secondary fuel nozzle are arranged facing the exhaust gas flow path, and stable combustion air is sent only in the vicinity of the secondary fuel nozzle. In this method, NOx in the exhaust gas is emitted as is without being reduced, so even if the generation of NOx is suppressed to some extent, the amount of NOx on the downstream side of the reheating burner will be lower than that on the upstream side. The total amount of NOx on the side also increases.
本発明は、上記問題点を解決する追焚き用ｅヘダクトパ
ーナｔ−１ｆｆｉ供する目的でなされた。The present invention was made for the purpose of providing a reheating e-head duct perna t-1ffi that solves the above-mentioned problems.
問題点を解決するための手段
本発明は上記問題点を解決するために、上流側に燃料及
び安定燃焼用空気が供給される一次燃料用ノズルを、そ
して下流側に燃料のみが供給される二次燃料用ノズルを
備えた予備燃焼ゾーンを、ダクトケーシング内に区画し
て設け、該ゾーンの下流端を前記ダクトケーシング内の
排ガス流路に合流させている。Means for Solving the Problems In order to solve the above problems, the present invention provides a primary fuel nozzle to which fuel and stable combustion air are supplied on the upstream side, and a secondary fuel nozzle to which only fuel is supplied to the downstream side. A pre-combustion zone provided with a secondary fuel nozzle is provided within the duct casing, and the downstream end of the zone joins the exhaust gas flow path within the duct casing.
作用
上記構成に依シ、予備燃焼ゾーンでは、まず−次燃料用
ノズルに依る一次燃焼でＮＯｘが発生し、このＮＯｘは
、次に続く二次燃料用ノズルに依る二次燃焼で還元され
ることになシ、該ゾーンの下流端部にはＮＯｘの少ない
高温排ガス（以下、高温ガスと称する）が供給されるこ
とになる。そして該高温ガスが上記予備燃焼ゾーンの下
流端で、昇温対象たる排ガスに合流し、該排ガスがＮＯ
ｘの少ない高温ガスで燃焼（三次燃焼）され、三次燃焼
を経た排ガス中のＮＯｘは極めて少ない状態きなる。Effect: Depending on the above configuration, in the pre-combustion zone, NOx is first generated by primary combustion by the secondary fuel nozzle, and this NOx is reduced by the subsequent secondary combustion by the secondary fuel nozzle. Otherwise, high-temperature exhaust gas containing less NOx (hereinafter referred to as high-temperature gas) is supplied to the downstream end of the zone. The high-temperature gas then joins the exhaust gas to be heated at the downstream end of the pre-combustion zone, and the exhaust gas becomes NO.
The exhaust gas is combusted (tertiary combustion) with a high temperature gas containing a small amount of x, and the amount of NOx in the exhaust gas after the tertiary combustion is extremely low.
また、新鮮な安定燃焼用空気の供給は、−次燃料用ノズ
ルのみに必要量だけ送り込めは事足りるため、排ガスの
圧力損失を小さくすることができ、空気動力も小さくて
済み、ダクトバーナ自体もコンパクト化できる。In addition, to supply fresh and stable combustion air, it is sufficient to send only the required amount to the secondary fuel nozzle, which reduces exhaust gas pressure loss, requires less air power, and makes the duct burner itself compact. can be converted into
実施例 以下、例示図面に基づいて本発明の詳細な説明する。Example Hereinafter, the present invention will be described in detail based on illustrative drawings.
第１図と第２図は、本発明バーナをダクトケーシングの
中央に設けた構成の第１実施例で第２図Ｆｉ第１図にお
けるＡ−Ａ断面口である０図において（１）は昇温対象
たる排ガス（２）の流れるダクトケーシング、（３）は
上記ダクトケーシング（１）内に横架された燃料供給管
で、該燃料供給管（３）には、下流に向って開口する多
数の一次燃料用ノズル（４）が付設されている。（５）
は安定燃焼用空気（６）の送気管、（７）は上記送気管
（５）に連設されダクトケーシング（１）内の一次燃料
用ノズル（４）の存する位置に横架された空気ヘッダで
あり、該空気ヘッダ（７）は図示するように、−次燃料
用ノズル（４）の下流側を除いて燃料供給管（３）を抱
持した状態に取付けられている。（８）は上記空気ヘッ
ダ（７）に多数形成した空気孔を示す。Figures 1 and 2 show a first embodiment of the structure in which the burner of the present invention is installed in the center of the duct casing. A duct casing through which the exhaust gas (2) to be heated flows, and (3) a fuel supply pipe installed horizontally within the duct casing (1). A primary fuel nozzle (4) is attached. (5)
is an air supply pipe for stable combustion air (6), and (7) is an air header connected to the above-mentioned air supply pipe (5) and installed horizontally at the position where the primary fuel nozzle (4) is located in the duct casing (1). As shown in the figure, the air header (7) is attached to hold the fuel supply pipe (3) except for the downstream side of the secondary fuel nozzle (4). (8) indicates a large number of air holes formed in the air header (7).
（９）は、予備燃焼ゾーンαＧｔ−形成すべく、上記−
次燃料用ノズル（４）の下流側に連続して配置され且つ
ダクトケーシング（１）内に横架された仕切板であり、
該仕切板（９）に二次燃焼ノズル（６）が取付けられて
いる。（２）は−次燃料用ノズル（４）から噴出される
燃料（２）によって形成される一次燃焼域、α滲は二次
燃料用ノズル（６）から噴出される燃料−によって形成
される二次燃焼域、またα９は二次燃焼域α４を経た高
温ガスｕＱが排ガス（２）と合流することによって形成
される三次燃焼域金示す。(9) In order to form the pre-combustion zone αGt, the above-mentioned
A partition plate that is disposed continuously on the downstream side of the next fuel nozzle (4) and horizontally suspended within the duct casing (1),
A secondary combustion nozzle (6) is attached to the partition plate (9). (2) is the primary combustion area formed by the fuel (2) injected from the secondary fuel nozzle (4), and α is the secondary combustion area formed by the fuel injected from the secondary fuel nozzle (6). The secondary combustion zone α9 indicates the tertiary combustion zone formed by the high temperature gas uQ that has passed through the secondary combustion zone α4 joining with the exhaust gas (2).
勿論、上記両燃料用ノズル（４）回をダクトケーシング
（１）の側壁（ｌａ）あるいは天井壁（１ｂ）に直接取
付ける構成を採ってもよく、この場合には、予備燃焼ゾ
ーンｏｃｔ？：形成する仕切板（９）は第３．４図（第
２実施例図）Ｋ示す如く配設される。Of course, a configuration may be adopted in which the two fuel nozzles (4) are directly attached to the side wall (la) or ceiling wall (1b) of the duct casing (1), and in this case, the pre-combustion zone oct? : The partition plate (9) to be formed is arranged as shown in FIG. 3.4 (second embodiment) K.
第５．６図（第３実施例図）け、排ガス（２）と高温ガ
スα０との混合を良好にするため、ダクトケーシング（
１）内の排ガス流路αηに旋回翼（至）を配設した実施
例図である。なお、上記第３図〜第６図中第１図、第２
図に用いた符号と同一の符号は、同−物若しくは該当物
金示す。Fig. 5.6 (3rd embodiment diagram) shows that the duct casing (
1) is an embodiment diagram in which a swirler vane (to) is disposed in the exhaust gas flow path αη in the exhaust gas flow path αη. In addition, Figures 1 and 2 in Figures 3 to 6 above
The same reference numerals as those used in the figures indicate the same or corresponding items.
上記例示した各実施例ダクトバーナのダクトケーシング
（１）に排ガス（２）を流し、−次燃料用ノズル（４）
、二次燃料用ノズル圓それぞれに燃料を分割供給すると
共に一次燃料用ノズル（４）のみに安定燃焼用空気（６
）を供給してＮＯｘの少ない高温ガスα句を得、該高温
ガスＱｅで排ガス（２）を燃焼し昇温させる。従って昇
温化された排ガス（２）中にはＮＯｘが少ないことにな
るう
発明の詳細
な説明したように本発明は、三段燃焼法を採用していて
低ＮＯｘの高温ガスで排ガスを昇温させるものであシ、
このダクトバーナを通過した排ガス中のＮＯｘは極めて
少なｈものとなっている。更に本発明に依れば、更に安
定燃焼用空気を必要量（排ガス中の酸素濃度で定まる〕
だけ供給して排気ガスの圧力損失を小さくなし、例えば
ガスタービン等の出力ロスを押えることができ、勿論、
必要最小限の安定燃焼用空気のみを送ればよいため、空
気動力を小さくでき、ダクトバーナ自体もコンパクト化
できるという長所を有する。The exhaust gas (2) is passed through the duct casing (1) of each of the duct burners illustrated above, and the secondary fuel nozzle (4) is
, fuel is dividedly supplied to each of the secondary fuel nozzle circles, and stable combustion air (6) is supplied only to the primary fuel nozzle (4).
) is supplied to obtain a high-temperature gas α with less NOx, and the exhaust gas (2) is combusted and heated with the high-temperature gas Qe. Therefore, there is less NOx in the heated exhaust gas (2).As explained in detail, the present invention employs a three-stage combustion method to raise the exhaust gas using high-temperature gas with low NOx. It's something to warm you up,
The amount of NOx in the exhaust gas that has passed through this duct burner is extremely low. Furthermore, according to the present invention, the required amount of stable combustion air (determined by the oxygen concentration in the exhaust gas)
It is possible to reduce the pressure loss of exhaust gas by supplying only
Since only the minimum necessary amount of stable combustion air needs to be sent, the air power can be reduced and the duct burner itself can be made more compact.
なお上記説明は、ガスタービンの排ガスの追焚きについ
て述べたが、臭気のある排ガスのダクト内脱臭、或いは
単なる熱風発生にも広く適用できる。Although the above description has been made regarding the reheating of exhaust gas from a gas turbine, it is also widely applicable to deodorizing the inside of a duct of smelly exhaust gas or simply generating hot air.
第１図は第１実施例の断面図、第２図は第１図における
一部省略Ａ−Ａ断面図、第３図は第２実施例の断面図、
第４図は第３図におけるＢ−Ｂ断面図、第５図は第３実
施例の断面図、第６図は第５図におけるＣ−Ｃ断面図で
ある。
（１）・・−ダクトケーシング、（２）・・・排ガス、
（４）・・・−次燃焼用ノズル、（６）・・・安定燃焼
用空気、ａＣｊ・・・予備燃焼ゾーン、（６）・・・二
次燃料用ノズル、Ｕ・・・燃料、αη・・・排ガス流路
代理人 森 本 義 弘
第３図
第４図FIG. 1 is a sectional view of the first embodiment, FIG. 2 is a sectional view taken along line AA in FIG. 1, with parts omitted, and FIG. 3 is a sectional view of the second embodiment.
4 is a sectional view taken along the line BB in FIG. 3, FIG. 5 is a sectional view taken along the line CC in FIG. 5, and FIG. 6 is a sectional view taken along the line CC in FIG. (1)...-duct casing, (2)...exhaust gas,
(4)... - Nozzle for secondary combustion, (6)... Air for stable combustion, aCj... Preliminary combustion zone, (6)... Nozzle for secondary fuel, U... Fuel, αη ...Exhaust gas flow path agent Yoshihiro MorimotoFigure 3Figure 4
Claims (1)
燃料用ノズルを、そして下流側に燃料のみが供給される
二次燃料用ノズルを備えた予備燃焼ゾーンを、ダクトケ
ーシング内に区画して設け、該ゾーンの下流端を前記ダ
クトケーシング内の排ガス流路に合流させたことを特徴
とする追焚き用低ＮＯｘダクトバーナ。1. A preliminary combustion zone is defined in the duct casing, with a primary fuel nozzle to which fuel and stable combustion air are supplied on the upstream side, and a secondary fuel nozzle to which only fuel is supplied to the downstream side. A low NOx duct burner for reheating, characterized in that the zone is provided with a downstream end thereof merging with an exhaust gas flow path in the duct casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26304185A JPS62123208A (en) | 1985-11-21 | 1985-11-21 | Low nox duct burner for additional heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26304185A JPS62123208A (en) | 1985-11-21 | 1985-11-21 | Low nox duct burner for additional heating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62123208A true JPS62123208A (en) | 1987-06-04 |
Family
ID=17384044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26304185A Pending JPS62123208A (en) | 1985-11-21 | 1985-11-21 | Low nox duct burner for additional heating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62123208A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1122494A1 (en) * | 2000-02-04 | 2001-08-08 | Entreprise Generale De Chauffage Industriel Pillard | Gas burners for heating a gas flowing in a duct |
| JP2013142393A (en) * | 2012-01-10 | 2013-07-22 | General Electric Co <Ge> | Combined cycle power plant |
| US9222410B2 (en) | 2011-04-13 | 2015-12-29 | General Electric Company | Power plant |
| US11691102B2 (en) | 2014-08-01 | 2023-07-04 | Donaldson Company, Inc. | Filtration media, pleated media pack, filter cartridge, and methods for manufacturing |
-
1985
- 1985-11-21 JP JP26304185A patent/JPS62123208A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1122494A1 (en) * | 2000-02-04 | 2001-08-08 | Entreprise Generale De Chauffage Industriel Pillard | Gas burners for heating a gas flowing in a duct |
| FR2804748A1 (en) * | 2000-02-04 | 2001-08-10 | Pillard Chauffage | IMPROVEMENT WITH GAS BURNERS FOR HEATING A GAS FLOWING IN A CONDUIT |
| US6409502B2 (en) | 2000-02-04 | 2002-06-25 | Entreprise Generale De Chauffage Industriel Pillard | Gas burners for heating a gas flowing in a duct |
| US9222410B2 (en) | 2011-04-13 | 2015-12-29 | General Electric Company | Power plant |
| JP2013142393A (en) * | 2012-01-10 | 2013-07-22 | General Electric Co <Ge> | Combined cycle power plant |
| US11691102B2 (en) | 2014-08-01 | 2023-07-04 | Donaldson Company, Inc. | Filtration media, pleated media pack, filter cartridge, and methods for manufacturing |
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