JPH0777302A - Nitrogen oxide low generation boiler - Google Patents
Nitrogen oxide low generation boilerInfo
- Publication number
- JPH0777302A JPH0777302A JP22254193A JP22254193A JPH0777302A JP H0777302 A JPH0777302 A JP H0777302A JP 22254193 A JP22254193 A JP 22254193A JP 22254193 A JP22254193 A JP 22254193A JP H0777302 A JPH0777302 A JP H0777302A
- Authority
- JP
- Japan
- Prior art keywords
- burner
- combustion
- boiler
- exhaust gas
- low
- 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
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
- F22B31/04—Heat supply by installation of two or more combustion apparatus, e.g. of separate combustion apparatus for the boiler and the superheater respectively
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
(57)【要約】
【目的】 本発明は、窒素酸化物の発生を低レベルに抑
制するボイラを提供するものである。構成】 ボイラ上
流側に高空気比で燃料を燃焼させる低温バーナを設置
し、ボイラの最上流側と最下流側の中間部に前記低温バ
ーナの燃焼ガスを用いて燃料を燃焼させる排ガスバーナ
を設けたことを特徴とするものである。低温バーナに於
いては、水管群による吸熱されながらの高空気比燃焼で
あるため、燃焼温度が低くＮＯX の発生は効果的に抑制
されると同時に、排ガスバーナでは、燃料を、前記燃焼
ガスの残留酸素を利用して、未燃部分と共に排ガス雰囲
気燃焼により、水管群による吸熱をうけながら燃焼させ
るため、特別の高温部が形成されず、ＮＯXの発生は効
果的に抑制される。
(57) [Summary] [Object] The present invention provides a boiler that suppresses the generation of nitrogen oxides to a low level. Configuration] A low temperature burner that burns fuel with a high air ratio is installed on the upstream side of the boiler, and an exhaust gas burner that burns the fuel using the combustion gas of the low temperature burner is installed in the middle part between the most upstream side and the most downstream side of the boiler. It is characterized by that. In the low-temperature burner, since the combustion is performed at a high air ratio while being absorbed by the water tube group, the combustion temperature is low and the generation of NO X is effectively suppressed. by utilizing the residual oxygen, the exhaust gas atmosphere combustion with non燃部min, to burn while receiving the heat absorption of the water tube group, not the high temperature portion of the special is formed, occurrence of the NO X is effectively suppressed.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、窒素酸化物低発生ボイ
ラに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nitrogen oxide low generation boiler.
【０００２】[0002]
【従来の技術】ボイラの最上流側にバーナを設置して燃
焼させ、下流に行くに従って燃焼反応と伝熱が行われ、
燃焼ガス温度が徐々に低下して行く構成である。2. Description of the Related Art A burner is installed on the most upstream side of a boiler for combustion, and combustion reaction and heat transfer are performed as it goes downstream.
The combustion gas temperature is gradually lowered.
【０００３】[0003]
【発明が解決しようとする課題】前記従来の型のボイラ
では、窒素酸化物（ＮＯX ）やＣＯの排出量は、ボイラ
最上流側のバーナで決まってしまい、それらの低減のた
めの調整パラメータが少ないし、またＮＯX の発生を抑
制するために稀薄燃焼を実行すると、高Ｏ2 の排ガスに
よって効率低下に直結する等の課題がある。In the conventional type boiler, the emission amount of nitrogen oxides (NO x ) and CO is determined by the burner on the most upstream side of the boiler, and adjustment parameters for reducing them are set. However, if lean combustion is performed to suppress the generation of NO x , there is a problem that the exhaust gas with high O 2 directly leads to a decrease in efficiency.
【０００４】[0004]
【課題を解決するための手段】前記課題を解決するため
に、ボイラ上流側に高空気比で燃料を燃焼させる低温バ
ーナを設置し、ボイラの最上流側と最下流側の中間部に
前記低温バーナの燃焼ガスを用いて燃料を燃焼させる排
ガスバーナを設けたことを特徴とするものである。In order to solve the above-mentioned problems, a low temperature burner for burning fuel at a high air ratio is installed on the upstream side of the boiler, and the low temperature burner is provided in an intermediate portion between the most upstream side and the most downstream side of the boiler. An exhaust gas burner for burning fuel using combustion gas of the burner is provided.
【０００５】また、本発明は、低温バーナの燃焼ガスの
一部を排ガス導入管を介して排ガスバーナに導き、燃料
と燃焼ガスと混合させることを特徴とするものである。Further, the present invention is characterized in that a part of the combustion gas of the low temperature burner is introduced into the exhaust gas burner through the exhaust gas introduction pipe to mix the fuel and the combustion gas.
【０００６】[0006]
【作用】低温バーナに於いては、水管群による吸熱され
ながらの高空気比燃焼であるため、燃焼温度が低くＮＯ
X の発生は効果的に抑制されると同時に、排ガスバーナ
では、燃料を、前記燃焼ガスの残留酸素を利用して、未
燃部分と共に排ガス雰囲気燃焼により、水管群による吸
熱をうけながら燃焼させるため、特別の高温部が形成さ
れず、ＮＯX の発生は効果的に抑制される。In the low temperature burner, the combustion temperature is low because the combustion is performed at a high air ratio while absorbing heat by the water tube group.
The generation of X is effectively suppressed, and at the same time, in the exhaust gas burner, the fuel is burned by taking advantage of the residual oxygen of the combustion gas and by the exhaust gas atmosphere combustion together with the unburned portion while receiving the heat absorption by the water tube group. Therefore, no special high temperature portion is formed, and the generation of NO X is effectively suppressed.
【０００７】[0007]
【実施例】符号１は水管群５を具えたボイラ本体であっ
て、このボイラ本体１の最上流側には、高空気比で燃料
を燃焼させる低温バーナ２を設置し、ボイラ本体１の最
上流側と最下流側との中間部３には、前記低温燃焼バー
ナ２の燃焼ガスを用いて燃料を燃焼させる排ガスバーナ
４を設置する。また、前記低温バーナ２で燃焼した燃焼
ガスの一部を排ガス導入管６を介して排ガスバーナ４に
導入し、燃料と混合させて燃焼させてもよい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 is a boiler main body having a water tube group 5, and a low temperature burner 2 for burning fuel at a high air ratio is installed on the most upstream side of the boiler main body 1, and the boiler main body 1 An exhaust gas burner 4 that burns fuel using the combustion gas of the low temperature combustion burner 2 is installed in the intermediate portion 3 between the upstream side and the most downstream side. Further, a part of the combustion gas burned in the low temperature burner 2 may be introduced into the exhaust gas burner 4 via the exhaust gas introduction pipe 6, mixed with fuel and burned.
【０００８】しかして、低温バーナ２に於いては、水管
群５による吸熱されながらの高空気比燃焼であるため、
燃焼温度が低くＮＯX の発生は効果的に抑制されると同
時に、中間部３に位置する排ガスバーナ４では、燃料
を、前記燃焼ガスの残留酸素を利用して未燃部分と共に
排ガス雰囲気燃焼により、水管群５による吸熱をうけな
がら燃焼させるため、特別の高温部が形成されず、ＮＯ
X の発生は効果的に抑制される。即ち、排ガスバ−ナ４
の下流側の雰囲気が、前記低温バ−ナ２からの燃焼ガス
で充満していることによって、排ガス再循環的燃焼、或
は、排ガス雰囲気燃焼ともいうべき燃焼が達成できて、
特別の高音部を形成しない低温燃焼を効果的に実行する
ことができる。排ガスバーナ４には、燃焼ガスの一部
を、排ガス導入管６を介して直接導入して、燃料と混合
させると、燃焼前に混合がなされていることによって前
記燃焼が一層効果的に実行される。In the low temperature burner 2, however, since the high air ratio combustion is performed while absorbing heat by the water tube group 5,
The combustion temperature is low and the generation of NO x is effectively suppressed. At the same time, the exhaust gas burner 4 located in the intermediate portion 3 uses the residual oxygen of the combustion gas to burn the fuel together with the unburned portion by the exhaust gas atmosphere combustion. Since it burns while receiving the heat absorption by the water tube group 5, no special high temperature portion is formed and NO
The generation of X is effectively suppressed. That is, the exhaust gas burner 4
Since the atmosphere on the downstream side of the exhaust gas is filled with the combustion gas from the low-temperature burner 2, exhaust gas recirculation combustion or combustion that should be called exhaust gas atmosphere combustion can be achieved.
It is possible to effectively carry out low temperature combustion without forming a special treble portion. When a part of the combustion gas is directly introduced into the exhaust gas burner 4 through the exhaust gas introduction pipe 6 and mixed with the fuel, the combustion is performed more effectively because the mixing is performed before the combustion. It
【０００９】[0009]
【発明の効果】本発明は以上通り、ボイラの最上流側に
位置させた低温バーナと、ボイラの中間部に位置させた
排ガスバーナによって窒素酸化物低の発生を効果的に抑
制する優れたボイラを提供するものである。As described above, the present invention is an excellent boiler which effectively suppresses the generation of low nitrogen oxides by the low temperature burner located on the most upstream side of the boiler and the exhaust gas burner located in the middle of the boiler. Is provided.
【００１０】[0010]
【図１】全体を示すボイラの断面的説明図である。FIG. 1 is a cross-sectional explanatory view of a boiler showing the whole.
１ ボイラ本体 ２ 低温バーナ ３ 中間部 ４ 排ガスバーナ ５ 水管群 ６ 排ガス導入管 ７ 排気部 ８ 仕切部材 1 Boiler main body 2 Low temperature burner 3 Intermediate part 4 Exhaust gas burner 5 Water pipe group 6 Exhaust gas introduction pipe 7 Exhaust part 8 Partition member
Claims (2)
せる低温バーナを設置し、ボイラの最上流側と最下流側
の中間部に前記低温バーナの燃焼ガスを用いて燃料を燃
焼させる排ガスバーナを設けたことを特徴とする窒素酸
化物低発生ボイラ。1. A low temperature burner that burns fuel at a high air ratio is installed on the upstream side of the boiler, and an exhaust gas that burns the fuel by using the combustion gas of the low temperature burner at an intermediate portion between the most upstream side and the most downstream side of the boiler. A low-nitrogen-oxide generating boiler characterized by having a burner.
入管を介して排ガスバーナに導き、燃料と燃焼ガスと混
合燃焼させることを特徴とする請求項１記載の窒素酸化
物低発生ボイラ。2. The low nitrogen oxide generation boiler according to claim 1, wherein a part of the combustion gas of the low-temperature burner is introduced into the exhaust gas burner through the exhaust gas introduction pipe, and is mixed and burned with the fuel and the combustion gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22254193A JPH0777302A (en) | 1993-09-07 | 1993-09-07 | Nitrogen oxide low generation boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22254193A JPH0777302A (en) | 1993-09-07 | 1993-09-07 | Nitrogen oxide low generation boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0777302A true JPH0777302A (en) | 1995-03-20 |
Family
ID=16784062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22254193A Pending JPH0777302A (en) | 1993-09-07 | 1993-09-07 | Nitrogen oxide low generation boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0777302A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0769654A1 (en) * | 1995-10-20 | 1997-04-23 | Exergy, Inc. | Supplying heat to an externally fired power system |
| CN103292307A (en) * | 2013-05-11 | 2013-09-11 | 王民发 | Gas-and-solid-fired environment-friendly industrial boiler |
-
1993
- 1993-09-07 JP JP22254193A patent/JPH0777302A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0769654A1 (en) * | 1995-10-20 | 1997-04-23 | Exergy, Inc. | Supplying heat to an externally fired power system |
| CN103292307A (en) * | 2013-05-11 | 2013-09-11 | 王民发 | Gas-and-solid-fired environment-friendly industrial boiler |
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