JPH05203123A - Low nox emission burner - Google Patents
Low nox emission burnerInfo
- Publication number
- JPH05203123A JPH05203123A JP4036955A JP3695592A JPH05203123A JP H05203123 A JPH05203123 A JP H05203123A JP 4036955 A JP4036955 A JP 4036955A JP 3695592 A JP3695592 A JP 3695592A JP H05203123 A JPH05203123 A JP H05203123A
- Authority
- JP
- Japan
- Prior art keywords
- combustion air
- combustion
- fuel gas
- burner
- gas
- 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
Landscapes
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、吸収式冷温水機、吸収
式冷凍機、蒸気ボイラー、温水ボイラーなどにおいて使
用される窒素酸化物（以下ＮＯｘと略す）の生成が低減
された低ＮＯｘバーナに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low NOx burner with reduced production of nitrogen oxides (hereinafter abbreviated as NOx) used in absorption chiller-heaters, absorption chillers, steam boilers, hot water boilers and the like. Regarding
【０００２】[0002]
【従来の技術】工場、事業所などから排出される排ガス
中のＮＯｘなどにより大気汚染が次第に増加する傾向に
あり、その対策が強く望まれている。燃料の燃焼によっ
て生成するＮＯｘは燃焼用空気の中に含まれている窒素
と酸素が高温状態において反応して生じるサーマルＮＯ
ｘと呼ばれるものと、燃料中に含まれる各種の窒素化合
物が燃焼に際して酸化されてＮＯｘとなるフューエルＮ
Ｏｘと呼ばれるものとがあるが、気体燃料を用いる場合
の殆どは、燃焼温度が高くなったことにより発生するサ
ーマルＮＯｘであり、酸素濃度が高いほど、燃焼温度が
高いほど、また高温での排ガスの滞留時間が長いほど多
く生成される。従って、サーマルＮＯｘを低減するため
には、酸素濃度を下げ、燃焼温度を下げ、燃焼の完結時
間を小さくして高温での排ガスの滞留時間を短くするこ
とが必要になる。2. Description of the Related Art Air pollution tends to gradually increase due to NOx in exhaust gas discharged from factories, business establishments, etc., and countermeasures against it are strongly desired. NOx produced by the combustion of fuel is thermal NO produced by the reaction of nitrogen and oxygen contained in the combustion air at high temperature.
Fuel N that is called "x" and various nitrogen compounds contained in the fuel are oxidized during combustion to become NOx.
Although there is what is called Ox, most of the cases where a gaseous fuel is used are thermal NOx generated due to an increase in combustion temperature, and the higher the oxygen concentration, the higher the combustion temperature, and the exhaust gas at a higher temperature. The longer the retention time is, the more is generated. Therefore, in order to reduce the thermal NOx, it is necessary to lower the oxygen concentration, lower the combustion temperature, shorten the combustion completion time, and shorten the residence time of the exhaust gas at high temperatures.
【０００３】そこで従来これらの考え方に従って、運転
条件の変更によるもの、低過剰空気燃焼、燃焼室熱発生
率の低減、燃焼用空気の予熱温度の低減、バーナの構造
を工夫してＮＯｘを低減させる低ＮＯｘバーナなどの燃
焼技術によるＮＯｘの抑制対策が種々なされている。こ
れらの中でも低ＮＯｘバーナによる対策は比較的簡単な
改良で既設の装置に適用できる可能性があり、抑制効果
も大きいので、効果的な低ＮＯｘバーナの開発が求めら
れている。Therefore, conventionally, according to these ideas, by changing operating conditions, low excess air combustion, reduction of heat generation rate of combustion chamber, reduction of preheating temperature of combustion air, NOx is reduced by devising burner structure. There are various measures for suppressing NOx by a combustion technology such as a low NOx burner. Among them, the countermeasure using the low NOx burner may be applicable to an existing device with a relatively simple improvement and has a large suppressing effect, so that the development of an effective low NOx burner is required.
【０００４】従来の低ＮＯｘガスバーナは、ＮＯｘ低減
はある程度可能であるが、燃焼温度が低下することによ
り、燃焼速度が小さくなり、振動燃焼が発生したり、不
完全燃焼が起こり一酸化炭素（ＣＯ）やすすが発生する
問題がある。The conventional low NOx gas burner can reduce NOx to some extent, but the combustion temperature decreases, the combustion speed decreases, and oscillating combustion occurs or incomplete combustion occurs, resulting in carbon monoxide (CO). ) There is a problem of sooting.
【０００５】従来の低ＮＯｘガスバーナの例として実開
平２−１４０１２２号公報に開示されたバーナがある
が、燃料ガス圧が低圧の場合（例えば、約１００ｍｍＨ
2 Ｏ）、空気と燃料ガスとの混合が良くなり、燃焼温度
が高くなりＮＯｘ濃度が高くなるという欠点がある。As an example of a conventional low NOx gas burner, there is a burner disclosed in Japanese Utility Model Laid-Open No. 2-140122, but when the fuel gas pressure is low (for example, about 100 mmH).
2 O), the mixture of air and fuel gas is improved, the combustion temperature is increased, and the NOx concentration is increased.
【０００６】[0006]
【発明が解決しようとする課題】従来の低ＮＯｘガスバ
ーナーは下記のような欠点があるので、これらを解決し
た低ＮＯｘガスバーナーを提供する。 急激な燃焼が起り、ＮＯｘ値を５０ｐｐｍ以下にす
ることが困難である。 振動燃焼限界が低く、安定燃焼域が狭いので燃料消
費量を高くできない。 排ガス再循環が起こらない。 不完全燃焼が起こり一酸化炭素（ＣＯ）やすすが発
生する。The conventional low NOx gas burner has the following drawbacks, and therefore a low NOx gas burner is provided that solves these problems. Rapid combustion occurs, and it is difficult to reduce the NOx value to 50 ppm or less. Since the vibration combustion limit is low and the stable combustion range is narrow, the fuel consumption cannot be increased. Exhaust gas recirculation does not occur. Incomplete combustion occurs and carbon monoxide (CO) or soot is generated.
【０００７】[0007]
【課題を解決するための手段】本発明者は上記の点に鑑
み鋭意研究した結果、ＮＯX 値を低減させる手段とし
て、燃料ガス噴出口、燃焼用空気通路や燃焼用空気孔の
配置やチューブの寸法をを特定することにより課題を解
決することができることを見いだして本発明を成すに至
った。As a result of earnest studies in view of the above points, the present inventor has found that as means for reducing the NO X value, the arrangement of fuel gas jet ports, combustion air passages and combustion air holes, and tubes. The present invention has been accomplished by finding that the problem can be solved by specifying the dimensions of.
【０００８】本発明の請求項１の発明は、先端に複数の
燃料ガス噴出口８をノズル周方向に設け、かつ、燃焼用
空気２の流れ方向と交わるようにガス噴出口８より燃料
ガス３が噴出される状態で形成したガスノズル４、およ
び外周辺に分割して設けた複数の燃焼用空気通路７Ｄお
よび燃焼用空気孔部７Ａ、７Ｂ、７Ｃを有するプレート
６を設けたチューブ５を形成したバーナ１において、ガ
スノズル４の中心Ｐと燃焼用空気通路７Ｄの中心とを結
ぶ線上に空気孔部７Ａと燃料ガス噴出口８を位置させ、
空気孔部７Ｂをガスノズル４の中心Ｐと燃焼用空気通路
７Ｄの縁Ｅとを結ぶ線上に位置させ、そして空気孔部７
Ｃをガスノズル４の中心Ｐとプレート凸部９の中心とを
結ぶ線上に位置させたことを特徴とする低ＮＯｘバーナ
である。According to the first aspect of the present invention, a plurality of fuel gas jets 8 are provided at the tip in the nozzle circumferential direction, and the fuel gas 3 is discharged from the gas jets 8 so as to intersect with the flow direction of the combustion air 2. A gas nozzle 4 formed in a state of being jetted, and a tube 5 provided with a plate 6 having a plurality of combustion air passages 7D and combustion air hole portions 7A, 7B, 7C formed separately on the outer periphery are formed. In the burner 1, the air hole portion 7A and the fuel gas ejection port 8 are located on the line connecting the center P of the gas nozzle 4 and the center of the combustion air passage 7D,
The air hole portion 7B is located on a line connecting the center P of the gas nozzle 4 and the edge E of the combustion air passage 7D, and the air hole portion 7B.
A low NOx burner characterized in that C is located on a line connecting the center P of the gas nozzle 4 and the center of the plate convex portion 9.
【０００９】本発明の請求項２の発明は、先端に複数の
燃料ガス噴出口８をノズル周方向に設け、かつ、燃焼用
空気２の流れ方向と交わるようにガス噴出口８より燃料
ガス３が噴出される状態で形成したガスノズル４、およ
び外周辺に分割して設けた複数の燃焼用空気通路７Ｄお
よび燃焼用空気孔部７Ａ、７Ｂ、７Ｃを有するプレート
６を設けたチューブ５を形成したバーナ１において、チ
ューブ５の寸法Ｆを燃料ガス噴出口８の位置する寸法Ｇ
よりも小さくしたことを特徴とする低ＮＯｘバーナであ
る。According to the second aspect of the present invention, a plurality of fuel gas jets 8 are provided at the tip in the circumferential direction of the nozzle, and the fuel gas 3 is discharged from the gas jets 8 so as to intersect with the flow direction of the combustion air 2. A gas nozzle 4 formed in a state of being jetted, and a tube 5 provided with a plate 6 having a plurality of combustion air passages 7D and combustion air hole portions 7A, 7B, 7C formed separately on the outer periphery are formed. In the burner 1, the dimension F of the tube 5 is changed to the dimension G at which the fuel gas ejection port 8 is located.
It is a low NOx burner characterized by being made smaller.
【００１０】本発明の請求項３の発明は、先端に複数の
燃料ガス噴出口８をノズル周方向に設け、かつ、燃焼用
空気２の流れ方向と交わるようにガス噴出口８より燃料
ガス３が噴出される状態で形成したガスノズル４、およ
び外周辺に分割して設けた複数の燃焼用空気通路７Ｄお
よび燃焼用空気孔部７Ａ、７Ｂ、７Ｃを有するプレート
６を設けたチューブ５を形成したバーナ１において、チ
ューブ５の寸法Ｆ’を燃料ガス噴出口８の位置する寸法
Ｇ’よりも大きくしたことを特徴とする低ＮＯｘバーナ
である。According to the third aspect of the present invention, a plurality of fuel gas jets 8 are provided at the tip in the circumferential direction of the nozzle, and the fuel gas 3 is discharged from the gas jets 8 so as to intersect with the flow direction of the combustion air 2. A gas nozzle 4 formed in a state of being jetted, and a tube 5 provided with a plate 6 having a plurality of combustion air passages 7D and combustion air hole portions 7A, 7B, 7C formed separately on the outer periphery are formed. In the burner 1, the low NOx burner is characterized in that the size F ′ of the tube 5 is made larger than the size G ′ where the fuel gas ejection port 8 is located.
【００１１】[0011]
【作用】 燃料ガス噴出口８より噴出した燃料ガス３は、燃焼
用空気孔部７Ａより供給される空気２と混合して、混合
ガス１０（図３）となる。ここでの混合比は、燃料の可
燃限界よりも高く、燃焼は起こらない。この混合ガス１
０は、次に燃焼用空気孔部７Ｂからの空気２によって、
可燃限界に達し、プレート６上に炎の境界線１１（図
２）をつくり保炎する。この燃焼によって、燃焼しきれ
なかった未燃ガスを、燃焼用空気孔部７Ｃおよび燃焼用
空気通路７Ｄより供給される空気２によって完全燃焼さ
せる。 上述のような空気の送り方によって、急激な燃焼を
させないので、燃焼時に発生するＮＯｘを４５〜５０ｐ
ｐｍ（Ｏ2 ０％換算）とし、かつ、安定した燃焼を行う
ことができる。 特に、空気孔部７Ｂをガスノズル４の中心Ｐと燃焼
用空気通路７Ｄの縁Ｅとを結ぶ線上に位置させることに
よって、図３に示すような、炎の境界面１２が生じ、図
４に示したように、炎のリフトにより振動燃焼限界が高
められ、安定燃焼域を広くすることができる。The fuel gas 3 ejected from the fuel gas ejection port 8 mixes with the air 2 supplied from the combustion air hole portion 7A to form a mixed gas 10 (FIG. 3). The mixing ratio here is higher than the flammability limit of the fuel, and combustion does not occur. This mixed gas 1
0 is then caused by the air 2 from the combustion air hole portion 7B,
The flammability limit is reached and flame boundaries 11 (FIG. 2) are created on the plate 6 to hold the flame. By this combustion, the unburned gas that cannot be completely burned is completely burned by the air 2 supplied from the combustion air hole portion 7C and the combustion air passage 7D. The above-mentioned air feeding method does not cause rapid combustion, so NOx generated during combustion is 45 to 50 p
and pm (O 2 0% conversion), and can perform stable combustion. In particular, by locating the air hole portion 7B on the line connecting the center P of the gas nozzle 4 and the edge E of the combustion air passage 7D, a flame boundary surface 12 as shown in FIG. 3 is generated, which is shown in FIG. As described above, the oscillating combustion limit is increased by the lift of the flame, and the stable combustion region can be widened.
【００１２】 図５に示したように、チューブ５から
プレート６の燃焼用空気孔部７を通過させて燃焼室側へ
燃焼用空気２を供給し、その空気２の流れ方向と交わる
ように燃料ガス噴出口８より燃料ガス３を噴出させる
際、チューブ５の寸法Ｆを燃料ガス噴出口８の位置する
寸法Ｇよりも小さくすると、図６のように、広がる炎が
形成されて矢印のような排ガス再循環１３が生じ、その
結果、発生するＮＯｘを３５〜４０ｐｐｍ（Ｏ2 ０％換
算）とすることができる。As shown in FIG. 5, the combustion air 2 is supplied from the tube 5 through the combustion air hole portion 7 of the plate 6 to the combustion chamber side, and the fuel is supplied so as to intersect with the flow direction of the air 2. When the dimension F of the tube 5 is made smaller than the dimension G where the fuel gas ejection port 8 is located when ejecting the fuel gas 3 from the gas ejection port 8, a spreading flame is formed as shown in FIG. Exhaust gas recirculation 13 occurs, and as a result, NOx generated can be 35 to 40 ppm (O 2 0% conversion).
【００１３】 図７のように、チューブ５からプレー
ト６の燃焼用空気孔部７を通過させて燃焼室側へ燃焼用
空気２を供給し、その空気２の流れ方向と交わるように
燃料ガス噴出口８より燃料ガス３を噴出させる際、チュ
ーブ５の寸法Ｆ’を燃料ガス噴出口８の位置する寸法
Ｇ’よりも大きくすると、未燃焼ガスをチューブ５の内
壁がとらえるので、図８に示すようにＣＯ限界が低下
し、安定燃焼域を広げることができる。As shown in FIG. 7, the combustion air 2 is supplied from the tube 5 through the combustion air hole portion 7 of the plate 6 to the combustion chamber side, and the fuel gas is injected so as to intersect with the flow direction of the air 2. When ejecting the fuel gas 3 from the outlet 8 and making the dimension F ′ of the tube 5 larger than the dimension G ′ at which the fuel gas outlet 8 is located, the unburned gas is captured by the inner wall of the tube 5, so that it is shown in FIG. Thus, the CO limit is lowered, and the stable combustion range can be expanded.
【００１４】[0014]
【実施例】次に本発明の低ＮＯX バーナを図１〜図８に
より詳細に説明するが、本発明の主旨を逸脱しない限り
実施例に限定されるものではない。図１に本発明の低Ｎ
ＯX バーナの断面図を示す。図２に本発明の低ＮＯX バ
ーナを矢印方向Ｘから見た側面図を示す。図３に本発明
の低ＮＯX バーナの燃焼時の炎の状態を示す。図４に本
発明の低ＮＯX バーナを用いた時の振動燃焼限界の変化
を示す。EXAMPLES The low NO x burner of the present invention will now be described in detail with reference to FIGS. 1 to 8, but is not limited to the examples without departing from the gist of the present invention. FIG. 1 shows the low N of the present invention.
A cross-sectional view of an O X burner is shown. FIG. 2 shows a side view of the low NO x burner of the present invention seen from the arrow direction X. FIG. 3 shows the state of the flame during combustion of the low NO x burner of the present invention. FIG. 4 shows changes in the oscillating combustion limit when the low NO x burner of the present invention is used.
【００１５】図１および図２に示すように、燃料ガス３
を燃焼用空気２と混合して燃焼させるバーナ１は、先端
に複数の燃料ガス噴出口８をノズル周方向に設けられ、
かつ、燃焼用空気２の流れ方向と交わるようにガス噴出
口８より燃料ガス３が噴出される状態で形成されてお
り、また外周辺に分割して設けた複数の燃焼用空気通路
７Ｄおよび燃焼用空気孔部７Ａ、７Ｂ、７Ｃを有するプ
レート６を設けたチューブ５を有している。ガスノズル
４の中心Ｐと燃焼用空気通路７Ｄの中心とを結ぶ線上に
複数の空気孔部７Ａと燃料ガス噴出口８を位置させ、複
数の空気孔部７Ｂをガスノズル４の中心Ｐと燃焼用空気
通路７Ｄの縁Ｅとを結ぶ線上に位置させ、そして複数の
空気孔部７Ｃをガスノズル４の中心Ｐと対応するプレー
ト凸部９の中心とを結ぶ線上に位置させている。このよ
うに燃料ガス噴出口８、燃焼用空気通路７Ｄや燃焼用空
気孔部７Ａ、７Ｂ、７Ｃの配置を特定することにより、
急激な燃焼をさせないので、燃焼時に発生するＮＯｘを
４５〜５０ｐｐｍ（Ｏ2 ０％換算）とし、かつ、安定し
た燃焼を行うことができた。また、図４に示したよう
に、炎のリフトにより振動燃焼限界Ａが振動燃焼限界Ｂ
となって高められ、安定燃焼域を広くすることができ
た。As shown in FIGS. 1 and 2, the fuel gas 3
The burner 1 which mixes and burns with the combustion air 2 is provided with a plurality of fuel gas ejection ports 8 at the tip in the nozzle circumferential direction,
Further, the fuel gas 3 is formed so as to be ejected from the gas ejection port 8 so as to intersect with the flow direction of the combustion air 2, and a plurality of combustion air passages 7D and combustion provided separately on the outer periphery are provided. It has a tube 5 provided with a plate 6 having air holes 7A, 7B, 7C for use. The plurality of air hole portions 7A and the fuel gas ejection ports 8 are positioned on the line connecting the center P of the gas nozzle 4 and the center of the combustion air passage 7D, and the plurality of air hole portions 7B are formed in the center P of the gas nozzle 4 and the combustion air. It is located on a line connecting the edge E of the passage 7D, and the plurality of air holes 7C are located on a line connecting the center P of the gas nozzle 4 and the center of the corresponding plate protrusion 9. By specifying the arrangement of the fuel gas ejection port 8, the combustion air passage 7D and the combustion air hole portions 7A, 7B, 7C in this way,
Since rapid combustion was not performed, NOx generated during combustion was 45 to 50 ppm (O 2 0% conversion), and stable combustion could be performed. Further, as shown in FIG. 4, the oscillating combustion limit A is changed to the oscillating combustion limit B by the flame lift.
The stable combustion range could be widened.
【００１６】図５に本発明の他の低ＮＯX バーナの断面
図を示す。図６に本発明の他の低ＮＯX バーナの燃焼時
の炎の状態を示す。図５に示したように、チューブ５の
寸法Ｆを燃料ガス噴出口８の位置する寸法Ｇよりも小さ
くしたことにより、図６に示すように、広がる炎が形成
されて矢印のような排ガス再循環１３が生じ、その結
果、発生するＮＯｘを３５〜４０ｐｐｍ（Ｏ2 ０％換
算）とすることができた。FIG. 5 shows a sectional view of another low NO x burner of the present invention. FIG. 6 shows the state of the flame during combustion of another low NO x burner of the present invention. As shown in FIG. 5, by making the dimension F of the tube 5 smaller than the dimension G at which the fuel gas ejection port 8 is located, as shown in FIG. The circulation 13 was generated, and as a result, the generated NOx could be 35 to 40 ppm (O 2 0% conversion).
【００１７】図７に本発明の他の低ＮＯX バーナの断面
図を示す。図８に本発明の他の低ＮＯX バーナを用いた
時のＣＯ限界の変化を示す。図７に示したように、チュ
ーブ５の寸法Ｆ’を燃料ガス噴出口８の位置する寸法
Ｇ’よりも大きくしたことにより、図８に示すように、
ＣＯ限界ＡがＣＯ限界Ｂに低下して、安定燃焼領域を広
げることができた。FIG. 7 shows a sectional view of another low NO x burner of the present invention. FIG. 8 shows the change in CO limit when another low NO x burner of the present invention is used. As shown in FIG. 7, by making the dimension F ′ of the tube 5 larger than the dimension G ′ where the fuel gas ejection port 8 is located, as shown in FIG.
The CO limit A decreased to the CO limit B, and the stable combustion region could be expanded.
【００１８】[0018]
【発明の効果】上記のように、本発明はＮＯｘの生成が
低減された低ＮＯｘガスバーナを提供するものであり、
燃料ガス噴出口、燃焼用空気通路や燃焼用空気孔の配置
やチューブの寸法を特定することによりＮＯX 値の低減
が計れる上、振動燃焼限界を上げたり、ＣＯ限界を下げ
たりすることができ、その結果、安定燃焼域を広げるこ
とができる。本発明の低ＮＯｘガスバーナはシンプルな
構造を有し、汎用性および低廉価性（低価格）の点にお
いても優れているので、吸収式冷温水機、吸収式冷凍
機、蒸気ボイラー、温水ボイラーなどにおいて好適に使
用でき、その産業上の利用価値は甚だ大きい。As described above, the present invention provides a low NOx gas burner in which the production of NOx is reduced.
The NO x value can be reduced by specifying the arrangement of the fuel gas jet, the combustion air passage and the combustion air hole, and the dimensions of the tube, and the vibration combustion limit and CO limit can be raised. As a result, the stable combustion range can be expanded. Since the low NOx gas burner of the present invention has a simple structure and is excellent in versatility and low price (low price), it can be used as an absorption chiller / heater, absorption chiller, steam boiler, hot water boiler, etc. It is suitable for use in, and its industrial utility value is enormous.
【図１】本発明の低ＮＯX バーナの断面図を示す。FIG. 1 shows a cross-sectional view of the low NO x burner of the present invention.
【図２】本発明の低ＮＯX バーナを矢印方向Ｘから見た
側面図を示す。FIG. 2 shows a side view of the low NO x burner of the present invention as seen in the direction of arrow X.
【図３】本発明の低ＮＯX バーナの燃焼時の炎の状態を
示す。FIG. 3 shows a flame state during combustion of the low NO x burner of the present invention.
【図４】本発明の低ＮＯX バーナを用いた時の振動燃焼
限界の変化を示す。FIG. 4 shows changes in oscillatory combustion limit when the low NO x burner of the present invention is used.
【図５】本発明の他の低ＮＯX バーナの断面図を示す。FIG. 5 shows a cross-sectional view of another low NO x burner of the present invention.
【図６】本発明の他の低ＮＯX バーナの燃焼時の炎の状
態を示す。FIG. 6 shows a flame state during combustion of another low NO x burner of the present invention.
【図７】本発明の他の低ＮＯX バーナの断面図を示す。FIG. 7 shows a cross-sectional view of another low NO x burner of the present invention.
【図８】本発明の他の低ＮＯX バーナを用いた時のＣＯ
限界の変化を示す。FIG. 8: CO when using another low NO x burner of the present invention
Shows the change in limits.
Ｅ 燃焼用空気通路の縁 Ｆ、Ｆ’ チューブの寸法 Ｇ、Ｇ’ 燃料ガス噴出口の位置する寸法 Ｐ ガスノズルの中心 １ 低ＮＯｘバーナ ２ 燃焼用空気 ３ 燃料ガス ４ ガスノズル ５ チューブ ６ プレート ７ 燃焼用空気孔部 ７Ａ、７Ｂ、７Ｃ 燃焼用空気孔部 ７Ｄ 燃焼用空気通路 ８ 燃料ガス噴出口 ９ プレート凸部 １０ 混合ガス １１ 炎の境界線 １２ 炎の境界面 １３ 排ガス再循環 １４ パイロットバーナ E Edge of combustion air passage F, F'tube dimensions G, G'Fuel gas outlet position P Gas nozzle center 1 Low NOx burner 2 Combustion air 3 Fuel gas 4 Gas nozzle 5 Tube 6 Plate 7 Combustion Air holes 7A, 7B, 7C Combustion air holes 7D Combustion air passages 8 Fuel gas jets 9 Plate projections 10 Mixed gas 11 Flame boundary line 12 Flame boundary surface 13 Exhaust gas recirculation 14 Pilot burner
Claims (3)
周方向に設け、かつ、燃焼用空気２の流れ方向と交わる
ようにガス噴出口８より燃料ガス３が噴出される状態で
形成したガスノズル４、および外周辺に分割して設けた
複数の燃焼用空気通路７Ｄおよび燃焼用空気孔部７Ａ、
７Ｂ、７Ｃを有するプレート６を設けたチューブ５を形
成したバーナ１において、ガスノズル４の中心Ｐと燃焼
用空気通路７Ｄの中心とを結ぶ線上に空気孔部７Ａと燃
料ガス噴出口８を位置させ、空気孔部７Ｂをガスノズル
４の中心Ｐと燃焼用空気通路７Ｄの縁Ｅとを結ぶ線上に
位置させ、そして空気孔部７Ｃをガスノズル４の中心Ｐ
とプレート凸部９の中心とを結ぶ線上に位置させたこと
を特徴とする低ＮＯｘバーナ。1. A plurality of fuel gas jets 8 are provided at the tip in the circumferential direction of the nozzle, and the fuel gas 3 is jetted from the gas jets 8 so as to intersect with the flow direction of the combustion air 2. The gas nozzle 4, and a plurality of combustion air passages 7D and combustion air holes 7A that are provided separately on the outer periphery,
In the burner 1 in which the tube 5 provided with the plate 6 having 7B and 7C is formed, the air hole portion 7A and the fuel gas ejection port 8 are positioned on the line connecting the center P of the gas nozzle 4 and the center of the combustion air passage 7D. , The air hole portion 7B is located on the line connecting the center P of the gas nozzle 4 and the edge E of the combustion air passage 7D, and the air hole portion 7C is located at the center P of the gas nozzle 4.
A low NOx burner characterized by being located on a line connecting the center of the plate projection 9 and the plate.
周方向に設け、かつ、燃焼用空気２の流れ方向と交わる
ようにガス噴出口８より燃料ガス３が噴出される状態で
形成したガスノズル４、および外周辺に分割して設けた
複数の燃焼用空気通路７Ｄおよび燃焼用空気孔部７Ａ、
７Ｂ、７Ｃを有するプレート６を設けたチューブ５を形
成したバーナ１において、チューブ５の寸法Ｆを燃料ガ
ス噴出口８の位置する寸法Ｇよりも小さくしたことを特
徴とする低ＮＯｘバーナ。2. A plurality of fuel gas jets 8 are provided at the tip in the nozzle circumferential direction, and the fuel gas 3 is jetted from the gas jets 8 so as to intersect with the flow direction of the combustion air 2. The gas nozzle 4, and a plurality of combustion air passages 7D and combustion air holes 7A that are provided separately on the outer periphery,
A low NOx burner characterized in that in a burner 1 having a tube 5 provided with a plate 6 having 7B and 7C, a dimension F of the tube 5 is made smaller than a dimension G at which the fuel gas ejection port 8 is located.
周方向に設け、かつ、燃焼用空気２の流れ方向と交わる
ようにガス噴出口８より燃料ガス３が噴出される状態で
形成したガスノズル４、および外周辺に分割して設けた
複数の燃焼用空気通路７Ｄおよび燃焼用空気孔部７Ａ、
７Ｂ、７Ｃを有するプレート６を設けたチューブ５を形
成したバーナ１において、チューブ５の寸法Ｆ’を燃料
ガス噴出口８の位置する寸法Ｇ’よりも大きくしたこと
を特徴とする低ＮＯｘバーナ。3. A plurality of fuel gas jets 8 are provided at the tip in the circumferential direction of the nozzle, and the fuel gas 3 is jetted from the gas jets 8 so as to intersect with the flow direction of the combustion air 2. The gas nozzle 4, and a plurality of combustion air passages 7D and combustion air holes 7A that are provided separately on the outer periphery,
A low NOx burner characterized in that in a burner 1 in which a tube 5 provided with a plate 6 having 7B and 7C is formed, a dimension F ′ of the tube 5 is made larger than a dimension G ′ at which the fuel gas ejection port 8 is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04036955A JP3081343B2 (en) | 1992-01-29 | 1992-01-29 | Low NOx burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04036955A JP3081343B2 (en) | 1992-01-29 | 1992-01-29 | Low NOx burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05203123A true JPH05203123A (en) | 1993-08-10 |
| JP3081343B2 JP3081343B2 (en) | 2000-08-28 |
Family
ID=12484171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04036955A Expired - Lifetime JP3081343B2 (en) | 1992-01-29 | 1992-01-29 | Low NOx burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3081343B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008241084A (en) * | 2007-03-26 | 2008-10-09 | Showa Mfg Co Ltd | Burner device and heating device comprising the same |
| JP2012087984A (en) * | 2010-10-19 | 2012-05-10 | Osaka Prefecture Univ | Multi-phase mixed combustion burner and boiler including the same |
| JP2012112560A (en) * | 2010-11-23 | 2012-06-14 | Toho Gas Co Ltd | Gas burner |
| US20130200271A1 (en) * | 2010-07-28 | 2013-08-08 | Hitachi High-Technologies Corporation | Charged particle beam device |
| KR101697123B1 (en) * | 2016-06-08 | 2017-01-18 | 주식회사 수국 | Burner for reducing NOx |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318485C (en) * | 2004-02-24 | 2007-05-30 | 中国科学院化学研究所 | Method for changing wet ability on surface of polymeric material |
| CN100577396C (en) * | 2005-04-08 | 2010-01-06 | 中国科学院化学研究所 | Method for resolving backflow of water solution at solid polymer edge |
-
1992
- 1992-01-29 JP JP04036955A patent/JP3081343B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008241084A (en) * | 2007-03-26 | 2008-10-09 | Showa Mfg Co Ltd | Burner device and heating device comprising the same |
| US20130200271A1 (en) * | 2010-07-28 | 2013-08-08 | Hitachi High-Technologies Corporation | Charged particle beam device |
| US8933422B2 (en) | 2010-07-28 | 2015-01-13 | Hitachi High-Technologies Corporation | Charged particle beam device |
| JP2012087984A (en) * | 2010-10-19 | 2012-05-10 | Osaka Prefecture Univ | Multi-phase mixed combustion burner and boiler including the same |
| JP2012112560A (en) * | 2010-11-23 | 2012-06-14 | Toho Gas Co Ltd | Gas burner |
| KR101697123B1 (en) * | 2016-06-08 | 2017-01-18 | 주식회사 수국 | Burner for reducing NOx |
| CN107477579A (en) * | 2016-06-08 | 2017-12-15 | 株式会社水国 | Low nitrogen oxide burner |
| CN107477579B (en) * | 2016-06-08 | 2020-11-20 | 株式会社水国 | Low nitrogen oxide burner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3081343B2 (en) | 2000-08-28 |
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