JPH07133906A - Low nitrogen oxide generation alternating burning method - Google Patents
Low nitrogen oxide generation alternating burning methodInfo
- Publication number
- JPH07133906A JPH07133906A JP5281233A JP28123393A JPH07133906A JP H07133906 A JPH07133906 A JP H07133906A JP 5281233 A JP5281233 A JP 5281233A JP 28123393 A JP28123393 A JP 28123393A JP H07133906 A JPH07133906 A JP H07133906A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- combustion
- heat storage
- storage layer
- unit
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Air Supply (AREA)
- Gas Burners (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は窒素酸化物低発生交番燃
焼方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-nitrogen oxide generation alternating combustion method.
【０００２】[0002]
【従来技術】蓄熱層を有する二ツのバーナ部を一組とし
て、交互に切替燃焼させる交番燃焼バーナは、一方が燃
焼した排ガスの顕熱を、他方の蓄熱層が回収し、次にそ
の蓄熱層を通過する燃焼用空気が回収された熱によって
充分に予熱されることで、間接式熱交換装置と比較して
高い予熱空気が得られ、非常に高いエネルギ効率が得ら
れる。2. Description of the Related Art An alternating combustion burner in which two burner sections each having a heat storage layer are combined and alternately switched and burned, one sensible heat of exhaust gas burned by the other heat recovery layer is recovered by the other heat storage layer. The combustion air passing through the bed is sufficiently preheated by the recovered heat, so that a high preheated air is obtained as compared with the indirect heat exchange device, and a very high energy efficiency is obtained.
【０００３】[0003]
【発明が解決しようとする課題】前記した交番燃焼バー
ナに於ける燃焼法は、予熱空気温度が高く窒素酸化物
（ＮＯX）の濃度が高くなる課題がある。これを解決す
るために、排ガス再循環法がある。かかる排ガス再循環
方法は、排ガスを強制的に空気導入部又は燃焼部に混入
して窒素分圧を低下させて燃焼させるが、これらは排ガ
ス導入のための諸設備が必然的になる上、再循環率が上
がるにつれて熱効率が低下するため、これの低下を防ぐ
ために、今度は再循環率制御が必要となる等の様々の課
題がある。SUMMARY OF THE INVENTION An object] in the combustion method in alternate combustion burner mentioned above, there is a concentration increases problems of preheated air temperature is high nitrogen oxides (NO X). In order to solve this, there is an exhaust gas recirculation method. Such an exhaust gas recirculation method compulsorily mixes the exhaust gas into the air introduction part or the combustion part to reduce the partial pressure of nitrogen and burn it, but these require various facilities for introducing the exhaust gas, and Since the thermal efficiency decreases as the circulation rate increases, there are various problems such as the need to control the recirculation rate in order to prevent the reduction in thermal efficiency.
【０００４】[0004]
【課題を解決するための手段】前記した課題を防ぐため
に、本発明は、蓄熱層を有する二ツのバーナ部Ａ、Ｂを
一組として交互に切換燃焼させる交番燃焼バーナの前記
各バ−ナ部の蓄熱層にガス混入装置を装置し、該ガス混
入装置から加熱状態下の蓄熱層内に全燃焼量の１０〜２
５％のガスを混入して前記蓄熱層内に流入してくる燃焼
用空気と蓄熱稀薄燃焼反応を生じさせた後、残余のガス
を炉内を含む前記蓄熱層下流側から導入するようにした
ことを特徴とするものである。In order to prevent the above-mentioned problems, the present invention relates to each of the above-mentioned burners of an alternating combustion burner in which two burner parts A and B having a heat storage layer are alternately switched and burned as one set. A gas mixing device is installed in the heat storage layer of the section, and 10 to 2 of the total amount of combustion is stored in the heat storage layer under heating from the gas mixing device.
After mixing 5% of the gas to cause a lean heat storage combustion reaction with the combustion air flowing into the heat storage layer, the residual gas is introduced from the heat storage layer downstream side including the inside of the furnace. It is characterized by that.
【０００５】また、本発明は、加熱下の蓄熱層に於いて
温度の低い位置にガス混入装置を設けてガスを混入させ
ることを特徴とするものである。Further, the present invention is characterized in that a gas mixing device is provided at a position where the temperature is low in the heat storage layer under heating to mix the gas.
【０００６】また、本発明は、残余のガスを蓄熱層下流
側の燃焼ガス案内部に設けたことを特徴とするものであ
る。The present invention is also characterized in that the residual gas is provided in the combustion gas guide portion on the downstream side of the heat storage layer.
【０００７】[0007]
【作用】加熱された蓄熱層に、その下部から燃焼用空気
が導入されると同時に全燃焼量の例えば１０％のガスが
導入されると、ガスと空気は良好に混合しながら上昇
し、７００℃付近の高温部で蓄熱稀薄燃焼反応が開始す
る。発生した燃焼ガスは、蓄熱層下流側の燃焼ガス案内
部に設置した残余ガス噴出部から噴出するガスと良好に
混合燃焼しつつ炉内に導入され燃焼を完結する。When the combustion air is introduced into the heated heat storage layer from the lower part of the heat accumulation layer and at the same time a gas of 10% of the total combustion amount is introduced, the gas and the air rise while being mixed well. Heat storage lean combustion reaction starts at high temperature near ℃. The generated combustion gas is introduced into the furnace while being well mixed and combusted with the gas ejected from the residual gas ejecting portion provided in the combustion gas guide portion on the downstream side of the heat storage layer, and the combustion is completed.
【０００８】[0008]
【実施例】符号１は蓄熱層２を有する二ツのバーナ部を
一組として交互に切替燃焼させる交番燃焼バーナであ
る。この交番燃焼バーナの前記各バ−ナ部Ａ、Ｂの蓄熱
層２にはガス混入装置３を設置する。符号４は前記蓄熱
層２の下流側の燃焼ガス案内部５に設置した残余ガス噴
出装置である。ガス混入装置３は、蓄熱層２の温度の低
い位置に設置すると、燃焼領域である高温部６に達する
までにガスと空気が良好に混合しながら予熱される。ま
た、残余ガス噴出部４を燃焼ガス案内部５に設置する
と、残余ガスは、燃焼ガスと良好に混合されつつ燃焼し
ながら炉内に導入される。この時の残余による燃焼ガス
は、一段目の燃焼により酸素分圧が下がっているため、
排ガス再循環の燃焼と同様の低ＮＯｘ効果が発揮でき
る。しかして、ガス混入装置３からは、全燃焼量の１０
％〜２５％のガスを導入する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 is an alternating combustion burner in which two burner portions each having a heat storage layer 2 are set as one set and alternately switched and burned. A gas mixing device 3 is installed in the heat storage layer 2 of each of the burner portions A and B of the alternating combustion burner. Reference numeral 4 is a residual gas ejection device installed in the combustion gas guide portion 5 on the downstream side of the heat storage layer 2. When the gas mixing device 3 is installed at a position where the temperature of the heat storage layer 2 is low, the gas and air are preheated while being mixed well by the time the temperature reaches the high temperature part 6 which is the combustion region. Further, when the residual gas ejection part 4 is installed in the combustion gas guide part 5, the residual gas is introduced into the furnace while being combusted while being mixed well with the combustion gas. The combustion gas due to the residue at this time has a reduced oxygen partial pressure due to the first stage combustion,
A low NOx effect similar to combustion of exhaust gas recirculation can be exhibited. Then, from the gas mixing device 3, the total combustion amount of 10
% To 25% gas is introduced.
【０００９】しかして、一ツのバーナ部Ａで燃焼した排
ガスは、他のバーナ部Ｂから排出される際、その顕熱
を、バーナ部Ｂの蓄熱層２が回収する。そして燃焼がバ
ーナ部Ａからバーナ部Ｂへ切替わると、バーナ部Ｂの蓄
熱層２にその下部から空気が導入されると同時にその蓄
熱層２には全燃焼量の、例えば１０％のガスがガス混入
装置３から蓄熱層２内に導入される。蓄熱層２は加熱状
態にあり、ガスと空気は上昇しながら良好に混合予熱さ
れて、高温部６の７００℃付近で燃焼反応が開始する。
燃焼ガスは、蓄熱層２下流側の燃焼ガス案内部５の残余
ガス噴出部４から残余のガスの供給をうけ、混合しなが
ら燃焼しつつ炉内７に導入され、炉内７に於いて燃焼を
完結して他のバーナ部Ａの蓄熱層２で顕熱の回収をされ
ながら排出される。かかる燃焼を、例えば６０秒毎に繰
り返す。かかる際、ガス混入装置３は、蓄熱層２の温度
の低い位置に設置すると、燃焼領域である高温部６に達
するまでにガスと空気が良好に混合しながら予熱され
る。また、残余ガス噴出部４を燃焼ガス案内部５に設置
すると、残余ガスは、燃焼ガスと良好に混合されつつ燃
焼しながら炉内に導入され、前記したように、排ガス再
循環効果と同様の効果によりＮＯｘ低減効果を助長す
る。しかして、ガス混入装置３からは、全燃焼量の１０
％〜２５％のガスを導入する。ガス混入装置３から噴出
するガス量を全燃焼量の１０％とした場合には、約５０
％の排出の際のＮＯX低減率が達成でき、２０％の混入
で約７０％の低減率が達成できた。ただし、混入率を２
５％以上としたり、片寄ったりすると煤の発生が生じ好
ましくない。本発明は、以上のように、稀薄燃焼を蓄熱
層内で実現し、その燃焼ガスと共に残余のガスを燃焼さ
せるので、いわゆる排ガス再循環燃焼と同様の低酸素分
圧下での燃焼を効果的に実行していることになり、燃焼
効率を低下させることなく、ＮＯXの発生を大巾に抑制
することができるのである。When the exhaust gas burned in one burner section A is discharged from the other burner section B, the sensible heat of the exhaust gas is recovered by the heat storage layer 2 of the burner section B. When the combustion is switched from the burner part A to the burner part B, air is introduced into the heat storage layer 2 of the burner part B from the lower portion thereof, and at the same time, 10% of the total combustion amount of gas is stored in the heat storage layer 2. It is introduced into the heat storage layer 2 from the gas mixing device 3. The heat storage layer 2 is in a heated state, the gas and air are mixed and preheated well while rising, and the combustion reaction starts near 700 ° C. in the high temperature section 6.
The combustion gas is supplied with the residual gas from the residual gas ejection portion 4 of the combustion gas guide portion 5 on the downstream side of the heat storage layer 2, and is introduced into the furnace 7 while being mixed and burned, and is burned in the furnace 7. Is completed and the sensible heat is recovered and discharged in the heat storage layer 2 of the other burner section A. Such combustion is repeated, for example, every 60 seconds. At this time, if the gas mixing device 3 is installed at a position where the temperature of the heat storage layer 2 is low, the gas and the air are preheated while being mixed well by the time they reach the high temperature part 6 which is the combustion region. Further, when the residual gas jetting section 4 is installed in the combustion gas guide section 5, the residual gas is introduced into the furnace while being burned while being mixed well with the combustion gas, and as described above, it is similar to the exhaust gas recirculation effect. The effect promotes the NOx reduction effect. Then, from the gas mixing device 3, the total combustion amount of 10
% To 25% gas is introduced. When the amount of gas ejected from the gas mixing device 3 is 10% of the total combustion amount, it is about 50
The NO x reduction rate at the time of emission of 10% could be achieved, and the reduction rate of about 70% could be achieved by mixing 20%. However, the mixing rate is 2
If it is 5% or more or if it is biased, soot is generated, which is not preferable. As described above, the present invention realizes lean combustion in the heat storage layer and burns the remaining gas together with the combustion gas, so that combustion under low oxygen partial pressure similar to so-called exhaust gas recirculation combustion is effectively performed. Since it is being executed, the generation of NO X can be greatly suppressed without lowering the combustion efficiency.
【００１０】[0010]
【発明の効果】本発明は以上の通りであるので、次の諸
効果がある。排ガス再循環設備が不要でＮＯXを同レ
ベルに抑制することができる、排ガス再循環燃焼は効
率の低下があるが、本発明は蓄熱層内での燃焼であるの
で、熱効率の低下がない、本発明は完全予熱混合蓄熱
燃焼であるので、排ガスが均等であり、排ガス再循環効
果が完全に得られる。As described above, the present invention has the following effects. Exhaust gas recirculation equipment is unnecessary and NO X can be suppressed to the same level. Exhaust gas recirculation combustion has a decrease in efficiency, but since the present invention is combustion in the heat storage layer, there is no decrease in thermal efficiency. Since the present invention is the complete preheat mixed heat storage combustion, the exhaust gas is uniform and the exhaust gas recirculation effect is completely obtained.
【図１】全体の説明図である。FIG. 1 is an explanatory diagram of the whole.
１ 交番燃焼バーナ ２ 蓄熱層 ３ ガス混入装置 ４ 残余ガス噴出装置 ５ 燃焼ガス案内部 ６ 高温部 ７ 炉内 1 Alternate Combustion Burner 2 Heat Storage Layer 3 Gas Mixing Device 4 Residual Gas Injection Device 5 Combustion Gas Guide 6 High Temperature 7 Inside Furnace
Claims (3)
して交互に切換燃焼させる交番燃焼バーナの前記各バ−
ナ部の蓄熱層にガス混入装置を装置し、該ガス混入装置
から加熱状態下の蓄熱層内に全燃焼量の１０〜２５％の
ガスを混入して、前記蓄熱層内に流入してくる燃焼用空
気と蓄熱稀薄燃焼反応を生じさせた後、残余のガスを炉
内を含む前記蓄熱層下流側から導入するようにしたこと
を特徴とする窒素酸化物低発生交番燃焼方法。1. Each of the above-mentioned burners of an alternating combustion burner in which two burner parts having a heat storage layer are alternately set and burned as one set.
A gas mixing device is installed in the heat storage layer of the inner portion, and 10 to 25% of the total combustion amount of gas is mixed into the heat storage layer under heating from the gas mixing device and flows into the heat storage layer. A low-nitrogen oxide low-generation alternating combustion method, characterized in that a residual gas is introduced from a downstream side of the heat storage layer including the inside of a furnace after causing a lean heat storage combustion reaction with combustion air.
にガス混入装置を設けてガスを混入させることを特徴と
する第１項記載の窒素酸化物低発生交番燃焼方法。2. The low-nitrogen oxide low-generation alternating combustion method according to claim 1, wherein a gas mixing device is provided at a position where the temperature is low in the heat storage layer under heating to mix the gas.
ス案内部に設けたことを特徴とする第１項記載の窒素酸
化物低発生交番燃焼方法。3. The low-nitrogen oxide low-generation alternating combustion method according to claim 1, wherein the residual gas ejection portion is provided in the combustion gas guide portion on the downstream side of the heat storage layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28123393A JP3212002B2 (en) | 1993-11-10 | 1993-11-10 | Low-nitrogen oxide alternating combustion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28123393A JP3212002B2 (en) | 1993-11-10 | 1993-11-10 | Low-nitrogen oxide alternating combustion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07133906A true JPH07133906A (en) | 1995-05-23 |
| JP3212002B2 JP3212002B2 (en) | 2001-09-25 |
Family
ID=17636225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28123393A Expired - Fee Related JP3212002B2 (en) | 1993-11-10 | 1993-11-10 | Low-nitrogen oxide alternating combustion method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3212002B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09184616A (en) * | 1995-12-29 | 1997-07-15 | Chugai Ro Co Ltd | Regenerative combustion device integral with panel |
| JP2011072919A (en) * | 2009-09-30 | 2011-04-14 | Toyobo Co Ltd | System for treating gas containing organic solvent |
-
1993
- 1993-11-10 JP JP28123393A patent/JP3212002B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09184616A (en) * | 1995-12-29 | 1997-07-15 | Chugai Ro Co Ltd | Regenerative combustion device integral with panel |
| JP2011072919A (en) * | 2009-09-30 | 2011-04-14 | Toyobo Co Ltd | System for treating gas containing organic solvent |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3212002B2 (en) | 2001-09-25 |
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