JPH06241416A - Gas fuel low oxygen burner and control method thereof - Google Patents
Gas fuel low oxygen burner and control method thereofInfo
- Publication number
- JPH06241416A JPH06241416A JP5026630A JP2663093A JPH06241416A JP H06241416 A JPH06241416 A JP H06241416A JP 5026630 A JP5026630 A JP 5026630A JP 2663093 A JP2663093 A JP 2663093A JP H06241416 A JPH06241416 A JP H06241416A
- Authority
- JP
- Japan
- Prior art keywords
- flame
- gas
- air cylinder
- fuel
- primary air
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Gas Burners (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、燃焼用空気として含有
酸素濃度が大気よりも低い気体（例えばガスタービンや
ディーゼルエンジン等の排気）を使用するガス燃料焚き
バーナとその制御方法に関するもので、発電事業用ボイ
ラやその他の産業用ボイラ、化学工業炉等に適用でき
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas fuel burning burner which uses a gas having a lower oxygen concentration than that of the atmosphere (for example, exhaust gas of a gas turbine or a diesel engine) as combustion air and a control method thereof. It can be applied to boilers for power generation business, other industrial boilers, chemical industrial furnaces, etc.
【０００２】[0002]
【従来の技術】図３は従来のガス燃料焚き低酸素バーナ
の一例を示す縦断側面図，図４は図３のIV−IV矢視正面
図，図５は図３のＶ−Ｖ矢視横断面図である。2. Description of the Related Art FIG. 3 is a vertical sectional side view showing an example of a conventional gas fuel-fired low oxygen burner, FIG. 4 is a front view taken along the line IV-IV in FIG. 3, and FIG. It is a side view.
【０００３】これらの図において、（０１）はボイラ本
体，（０２）はバーナ風箱，（０３）は一次空気筒，
（０４）は二次空気筒，（０５）は三次空気筒，（０
６）はガイドパイプ，（０７）は保炎器，（０８）は火
炎検出器，（０９）は一次空気流量調節用ダンパ，（１
０）は二次空気流量調節用ダンパ，（１１）は三次空気
流量調節用ダンパ，（１２）はバーナスロート耐火材，
（１３）は火炉内，（１４）は濃燃料ガスノズル，（１
５）は濃燃料ガスヘッダ，（１６）は濃燃料ガス管，
（１７）は淡燃料ガスノズル，（１８）は淡燃料ガスヘ
ッダ，（１９）は淡燃料ガス管，（２０）は濃燃料ガ
ス，（２１）は淡燃料ガス，（２２）は燃焼用空気，
（２３）は一次空気，（２４）は二次空気，（２５）は
淡燃料予混合気，（２６）は三次空気，（２７）は一次
空気通路，（２８）は淡燃料予混合室，（２９）は濃燃
料火炎，（３０）は淡燃料火炎，をそれぞれ示す。In these drawings, (01) is a boiler body, (02) is a burner box, (03) is a primary air cylinder,
(04) is the secondary air cylinder, (05) is the tertiary air cylinder, (0
6) is a guide pipe, (07) is a flame stabilizer, (08) is a flame detector, (09) is a primary air flow rate adjusting damper, (1)
0) is a secondary air flow rate adjusting damper, (11) is a tertiary air flow rate adjusting damper, (12) is a burner throat refractory material,
(13) is the inside of the furnace, (14) is the rich fuel gas nozzle, (1
5) is a rich fuel gas header, (16) is a rich fuel gas pipe,
(17) is a lean fuel gas nozzle, (18) is a lean fuel gas header, (19) is a lean fuel gas pipe, (20) is a rich fuel gas, (21) is a lean fuel gas, (22) is combustion air,
(23) is primary air, (24) is secondary air, (25) is lean fuel premixture, (26) is tertiary air, (27) is primary air passage, (28) is lean fuel premix chamber, (29) shows a rich fuel flame, (30) shows a light fuel flame, respectively.
【０００４】このようなバーナにおいて、図示されてな
い送風装置からバーナ風箱（０２）内へ送り込まれて来
た燃焼用空気（２２）は、一次空気（２３），二次空気
（２４）および三次空気（２６）へ分流される。このよ
うな燃焼用空気（２２）の分流は、一次，二次，三次の
各空気筒（０３），（０４），（０５）の入口に設けら
れた各空気流量調節用ダンパ（０９），（１０），（１
１）によって行なわれる。In such a burner, the combustion air (22) sent into the burner air box (02) from a blower (not shown) is used as primary air (23), secondary air (24) and It is diverted to the tertiary air (26). Such a split flow of the combustion air (22) is generated by the air flow rate adjusting damper (09) provided at the inlets of the primary, secondary, and tertiary air cylinders (03), (04), and (05). (10), (1
1).
【０００５】一次空気（２３）は一次空気筒（０３）内
へ入り、同一次空気筒（０３）の中心部に設けられたガ
イドパイプ（０６）の先端部に装着されている保炎器
（０７）の外周部から（一部は保炎器（０６）内を通っ
て）火炉内（１３）へ吹込まれる。二次空気（２４）
は，一次空気筒（０３）と二次空気筒（０４）によって
形成される環状断面の淡燃料予混合室（２８）におい
て、別途送り込まれて来た淡燃料ガス燃料（２１）と混
合し、淡燃料混合気（２５）を形成して火炉内（１１）
へ吹込まれる。三次空気（２６）は、一次空気（２３）
や二次空気（２４）に比べて少量ではあるが、二次空気
筒（０４）と三次空気筒（０５）によって形成される環
状断面通路から火炉内（１３）へ吹込まれて、燃焼に供
される。The primary air (23) enters the primary air cylinder (03), and a flame stabilizer (which is attached to the tip of a guide pipe (06) provided at the center of the same primary air cylinder (03) ( It is blown into the inside of the furnace (13) from the outer peripheral portion of (07) (partly through the flame stabilizer (06)). Secondary air (24)
Is mixed with the fresh fuel gas fuel (21), which has been separately fed, in the fresh fuel premixing chamber (28) having an annular cross section formed by the primary air cylinder (03) and the secondary air cylinder (04), A fuel mixture (25) is formed in the furnace (11)
Is blown into. The tertiary air (26) is the primary air (23)
Although it is a small amount compared with the secondary air (24) and the secondary air (24), it is blown into the furnace (13) through the annular cross-section passage formed by the secondary air cylinder (04) and the tertiary air cylinder (05) and used for combustion. To be done.
【０００６】一方、図示されてないガス燃料供給装置か
ら濃燃料ガス管（１６）および淡燃料ガス管（１９）を
通って圧送されて来た濃燃料ガス（２０）および淡燃料
ガス（２１）は、それぞれ一次空気通路（２７）内の濃
燃料ガスヘッダ（１５）および淡燃料予混合室（２８）
内の淡燃料ガスヘッダ（１８）に達する。On the other hand, the rich fuel gas (20) and the lean fuel gas (21) pressure-fed from a gas fuel supply device (not shown) through the rich fuel gas pipe (16) and the lean fuel gas pipe (19). Are respectively the rich fuel gas header (15) and the light fuel premix chamber (28) in the primary air passageway (27).
To reach the fresh fuel gas header (18).
【０００７】濃燃料ガスヘッダ（１５）に送り込まれて
来た濃燃料ガス（２０）は、一次空気筒（０３）内のガ
イドパイプ（０６）先端の保炎器（０７）の外周部に設
けられた複数個の濃燃料ガスノズル（１４）から火炉内
（１３）へ噴射され、図示されてない着火源によって着
火して濃燃料火炎（２９）を形成する。保炎器（０７）
外周部から火炉内（１３）へ噴射された濃燃料ガス（２
０）の一部は、一次空気（２３）流によって保炎器（０
７）の背面に形成される渦流に巻込まれて着火し、着火
源を形成する。したがって濃燃料火炎（２９）は保炎器
（０７）の近傍から着火し、極めて着火安定性に富む拡
散炎が形成される。The rich fuel gas (20) sent to the rich fuel gas header (15) is provided on the outer periphery of the flame stabilizer (07) at the tip of the guide pipe (06) in the primary air cylinder (03). A plurality of rich fuel gas nozzles (14) are injected into the furnace (13) and ignited by an ignition source (not shown) to form a rich fuel flame (29). Flame stabilizer (07)
Rich fuel gas (2) injected from the outer periphery into the furnace (13)
Part of the flame stabilizer (0) by the primary air (23) flow.
It is caught in the vortex formed on the back surface of 7) and ignites to form an ignition source. Therefore, the rich fuel flame (29) ignites in the vicinity of the flame stabilizer (07), and a diffusion flame having extremely high ignition stability is formed.
【０００８】一方、淡燃料ガスヘッダ（１８）に送り込
まれて来た淡燃料ガス（２１）は、淡燃料ガスノズル
（１７）から淡燃料予混合室（２８）内へ吹込まれ、別
途送り込まれて来た二次空気（２４）と混合して淡燃料
予混合気（２５）を形成する。そして火炉内（１１）へ
吹込まれ、図示されてない着火源によって着火し、淡燃
料火炎（３０）を形成する。On the other hand, the fresh fuel gas (21) sent to the fresh fuel gas header (18) is blown into the fresh fuel premix chamber (28) from the fresh fuel gas nozzle (17) and sent separately. And mixed with secondary air (24) to form a light fuel premix (25). Then, it is blown into the furnace (11) and ignited by an ignition source (not shown) to form a lean fuel flame (30).
【０００９】通常、濃燃料火炎（２９）と淡燃料火炎
（３０）の空気比λC およびλW 〔λ C ＝一次空気量／
（濃燃料ガス量×理論燃焼空気量），λW ＝二次空気量
／（淡燃料ガス量×理論燃焼空気量）〕は、窒素酸化物
（以下ＮＯx と記す）の発生を低く抑制するために、λ
C を約１．０以下，λW を約２に設定する。図６にガス
燃料のＮＯx 発生量と空気比の関係を示し、従来行なっ
ていたλC およびλW の設定値の一例を示した。図６に
おいては濃燃料火炎（２９）はλC ＝０．３５，淡燃料
火炎（３０）はλW ＝２．１０で，バーナ全体の空気比
λT は１．０５に設定されている。Usually, rich fuel flame (29) and light fuel flame
Air ratio λ of (30)CAnd λW[Λ C= Primary air volume /
(Rich fuel gas amount x theoretical combustion air amount), λW= Secondary air volume
/ (Amount of fresh fuel gas x theoretical combustion air amount)] is nitrogen oxide
(Hereinafter NOxTo suppress the occurrence of
CIs about 1.0 or less, λWTo about 2. Gas in Figure 6
NO of fuelxThe relationship between the amount generated and the air ratio is shown.
Was λCAnd λWAn example of the set value of is shown. In Figure 6
The rich fuel flame (29) is λC= 0.35, fresh fuel
The flame (30) is λW= 2.10, the air ratio of the entire burner
λTIs set to 1.05.
【００１０】濃燃料火炎（２９）は拡散炎であり、空気
比λC も低いので、一次空気（２３）は濃燃料火炎（２
９）の着火部近傍の燃焼に消費される。一方、淡燃料火
炎（３０）は予混合炎であり、着火するとほぼ瞬時に燃
焼を完結する。残った二次空気（２４）は濃燃料火炎
（２９）と拡散混合し、更に三次空気（２６）が拡散混
合して燃焼を完結する。Since the rich fuel flame (29) is a diffusion flame and the air ratio λ C is low, the primary air (23) is rich fuel flame (2).
It is consumed in the combustion near the ignition part in 9). On the other hand, the light fuel flame (30) is a premixed flame, and when ignited, the combustion is completed almost instantly. The remaining secondary air (24) is diffusively mixed with the rich fuel flame (29), and further the tertiary air (26) is diffusively mixed to complete combustion.
【００１１】なお、ガイドパイプ（０６）内には火炎検
出器（０８）が装着され、火炉内（１３）の火炎の有無
が検出される。A flame detector (08) is installed in the guide pipe (06) to detect the presence / absence of flame in the furnace (13).
【００１２】[0012]
【発明が解決しようとする課題】バーナ全体としての火
炎の安定性は、濃燃料火炎（２９）の着火が如何に安定
して行なわれるかにかかっている。濃燃料火炎（２９）
の着火安定性に最も影響を与えるのは、この発明の発明
者等がこれまで行なった実験の結果から、一次空気筒
（０３）出口部における一次空気（２３）の吹出し流速
であることが判明した。図７は、そのような発明者等の
実験結果から、ガス燃料焚きバーナの着火限界を、一次
空気（２３）の含有酸素濃度と一次空気（２３）流速と
の関係で示したものである。また図８は、一次空気（２
３）の含有酸素濃度をパラメータとして、一次空気（２
３）流速と保炎器（０７）メタル温度との関係を示した
ものである。図８を見ると、ガス燃料焚きバーナの着火
安定性は、一次空気（２３）の含有酸素濃度が低下する
に従い、一次空気（２３）流速も低下させて維持する必
要があることがわかる。The stability of the flame of the burner as a whole depends on how stably the rich fuel flame (29) is ignited. Rich fuel flame (29)
From the results of experiments conducted so far by the inventors of the present invention, it was found that the primary air (23) blowout flow velocity at the outlet of the primary air cylinder (03) has the greatest effect on the ignition stability of the. did. FIG. 7 shows the ignition limit of the gas-fuel-burning burner based on the results of the experiments conducted by the inventors, etc., in terms of the relationship between the oxygen concentration in the primary air (23) and the flow velocity of the primary air (23). Further, FIG. 8 shows that the primary air (2
Using the oxygen concentration of 3) as a parameter, the primary air (2
3) It shows the relationship between the flow velocity and the flame stabilizer (07) metal temperature. It can be seen from FIG. 8 that the ignition stability of the gas fuel-fired burner needs to be maintained by decreasing the flow rate of the primary air (23) as the oxygen concentration in the primary air (23) decreases.
【００１３】しかし、燃焼用空気として排気を供給して
いたガスタービンやディーゼルエンジンが突然トリップ
して、代りの燃焼用空気（２２）として大気（Ｏ2 ＝２
１％）が送風された場合、ガス燃料焚きバーナの火炎の
着火安定性は高まるが、同時に保炎器（０７）のメタル
温度が急上昇して保炎器（０７）が焼損する恐れが生じ
る（図８参照）。そこでこのような場合、従来のバーナ
では一次空気（２３）流量を増加させるために二次空気
（２４）および三次空気（２６）の流量を減ずるが、二
次空気（２４）の流量を低減し過ぎると、淡燃料予混合
気（２５）の燃料濃度が高まる上に流速が低下するの
で、逆火する恐れが生じる。したがってこれ等の流量調
整は極めて慎重に行なっているが、一次，二次および三
次の各空気流量調節用ダンパ（０９），（１０），（１
１）全てを操作する必要があるため、非常に手間を要し
ていた。However, the gas turbine or diesel engine, which had supplied the exhaust gas as combustion air, suddenly tripped, and replaced with the atmosphere (O 2 = 2) as combustion air (22).
(1%) is blown, the ignition stability of the flame of the gas fuel-fired burner is increased, but at the same time, the metal temperature of the flame stabilizer (07) rises rapidly, and the flame stabilizer (07) may be burned ( (See FIG. 8). Therefore, in such a case, in the conventional burner, the flow rates of the secondary air (24) and the tertiary air (26) are reduced in order to increase the flow rate of the primary air (23), but the flow rate of the secondary air (24) is reduced. If it passes, the fuel concentration of the fresh fuel premixture (25) increases and the flow velocity decreases, which may cause a flashback. Therefore, although these flow rates are extremely carefully adjusted, the primary, secondary, and tertiary air flow rate adjustment dampers (09), (10), (1
1) Since it was necessary to operate everything, it was very troublesome.
【００１４】本発明は、燃焼用空気の供給源であるガス
タービンやディーゼルエンジン等のトリップまたはそれ
等の運転開始により、燃焼用空気の含有酸素濃度が燃焼
中に急変した場合でも、火炎の着火安定性確保と保炎器
のメタル温度上昇防止を容易に行なうことができるよう
にすることを目的とする。According to the present invention, even if the oxygen concentration in the combustion air suddenly changes during combustion due to the trip of a gas turbine, a diesel engine, or the like, which is the supply source of combustion air, or the start of operation thereof, flame ignition occurs. An object of the present invention is to ensure stability and easily prevent the metal temperature rise of the flame stabilizer.
【００１５】[0015]
【課題を解決するための手段】本発明は、前記目的を達
成するために、下記のガス燃料低酸素バーナとその制御
方法を提案するものである。In order to achieve the above object, the present invention proposes the following gas fuel low oxygen burner and its control method.
【００１６】１） 軸心に配された一次空気筒と、同一
次空気筒を囲んで同軸に配された二次空気筒と、同二次
空気筒を囲んで同軸に配された三次空気筒と、上記一次
空気筒内に装着された濃燃料ガスノズルと、上記一次空
気筒と上記二次空気筒により形成される環状断面通路内
に装着された淡燃料ガスノズルとを具え、上記濃燃料ガ
スノズルおよび上記淡燃料ガスノズルから噴射されるガ
ス燃料を酸素濃度が大気よりも低い気体により燃焼させ
て、上記濃燃料ガスノズルから噴射されるガス燃料に拡
散炎を、上記淡燃料ガスノズルから噴射されるガス燃料
に予混合炎を、それぞれ形成させるようにしたガス燃料
低酸素バーナにおいて、上記一次空気筒にその内外を連
通する一次・二次空気連絡口を設けるとともに、同一次
・二次空気連絡口に開度調節ダンパを設けたことを特徴
とするガス燃料低酸素バーナ。1) A primary air cylinder arranged at the axis, a secondary air cylinder coaxially surrounding the same primary air cylinder, and a tertiary air cylinder coaxially surrounding the same secondary air cylinder. And a rich fuel gas nozzle mounted in the primary air cylinder, and a light fuel gas nozzle mounted in an annular cross-sectional passage formed by the primary air cylinder and the secondary air cylinder, the rich fuel gas nozzle and Combusting the gas fuel injected from the light fuel gas nozzle with a gas having an oxygen concentration lower than that of the atmosphere, a diffusion flame is generated in the gas fuel injected from the rich fuel gas nozzle, and a gas flame is injected into the gas fuel injected from the light fuel gas nozzle. In a gas-fueled low-oxygen burner configured to form premixed flames, primary and secondary air communication ports that communicate the inside and outside of the primary air cylinder are provided at the same primary and secondary air communication ports. A gas-fueled low-oxygen burner characterized by being provided with an opening adjustment damper.
【００１７】２） 上記１）記載のガス燃料低酸素バー
ナにおいて、火炎検出器の出力，保炎器のメタル温度お
よび上記気体の含有酸素濃度に基づいて、上記開度調節
ダンパを制御することを特徴とするガス燃料低酸素バー
ナの制御方法。2) In the gas fuel low oxygen burner described in 1) above, it is possible to control the opening adjustment damper based on the output of the flame detector, the metal temperature of the flame stabilizer and the oxygen concentration of the gas. A method for controlling a gas-fueled low oxygen burner, which is characterized.
【００１８】３） 上記火炎検出器の出力が所定値以下
の時は上記含有酸素濃度に関係なく上記開度調節ダンパ
を開いてゆくとともに、上記保炎器のメタル温度が所定
値以上の時は上記含有酸素濃度に関係なく上記開度調節
ダンパを閉じてゆくことを特徴とする上記２）記載のガ
ス燃料低酸素バーナの制御方法。3) When the output of the flame detector is below a predetermined value, the opening adjustment damper is opened regardless of the oxygen concentration, and when the metal temperature of the flame stabilizer is above a predetermined value. 2. The method for controlling a gas fuel low oxygen burner according to the above 2), wherein the opening adjustment damper is closed regardless of the contained oxygen concentration.
【００１９】[0019]
【作用】本発明においては、ガス燃料低酸素バーナの一
次空気筒にその内外を連通する一次・二次空気連絡口を
設けるとともに、同一次・二次空気連絡口に開度調節ダ
ンパを設けたので、例えば火炎検出器の出力，保炎器の
メタル温度および燃焼用気体（低酸素空気）の含有酸素
濃度に基づいて上記開度調節ダンパを制御することによ
り、一次空気筒の出口部から火炉内に吹込まれる一次空
気の流速を調節し、保炎器のメタル温度が過度に上昇す
るのを抑止しつつ、着火安定性を維持することができ
る。In the present invention, the primary air cylinder of the gas-fueled low oxygen burner is provided with the primary / secondary air communication port that communicates the inside and outside thereof, and the opening adjustment damper is provided at the same primary / secondary air communication port. Therefore, for example, by controlling the opening adjustment damper based on the output of the flame detector, the metal temperature of the flame stabilizer, and the oxygen concentration contained in the combustion gas (low oxygen air), the furnace from the outlet of the primary air cylinder can be controlled. The ignition stability can be maintained while controlling the flow velocity of the primary air blown into the inside of the flame holder to prevent the metal temperature of the flame stabilizer from rising excessively.
【００２０】特に火炎検出器の出力が所定値以下の時は
上記含有酸素濃度に関係なく上記開度調節ダンパを開い
てゆくとともに、上記保炎器のメタル温度が所定値以上
の時は上記含有酸素濃度に関係なく上記開度調節ダンパ
を閉じてゆくことにより、燃焼用気体の供給源に異変が
生じて含有酸素濃度が急変した場合でも、安全かつ安定
した燃焼を継続することができる。In particular, when the output of the flame detector is below a predetermined value, the opening control damper is opened regardless of the concentration of oxygen contained, and when the metal temperature of the flame stabilizer is above a predetermined value, the above content is contained. By closing the opening adjustment damper irrespective of the oxygen concentration, safe and stable combustion can be continued even if the supply source of the combustion gas changes suddenly and the contained oxygen concentration changes suddenly.
【００２１】[0021]
【実施例】図１は本発明のガス燃料低酸素バーナの一実
施例を示す縦断側面図，図２は図１のII−II矢視横断面
図である。これらの図において、前記図３ないし図５に
より説明した従来のものについては、冗長になるのを避
けるため、同一の符号を付け詳しい説明を省く。1 is a vertical sectional side view showing an embodiment of a gas fuel low oxygen burner according to the present invention, and FIG. 2 is a transverse sectional view taken along the line II--II of FIG. In these figures, the conventional ones described with reference to FIGS. 3 to 5 are given the same reference numerals to avoid redundancy, and detailed description thereof is omitted.
【００２２】図１および図２に新たに記載された部材と
して、（１０１）は一次・二次空気連絡口開度調節ダン
パ，（１０２）は一次・二次空気連絡口，（１０３）は
ダンパ操作桿，（１０４）はダンパ作動モータ，（１０
５）は火炎検出出力送受信計，（１０６）は酸素濃度
計，（１０７）は保炎器メタル温度測定計をそれぞれ示
す。As members newly described in FIGS. 1 and 2, (101) is a primary / secondary air communication opening adjustment damper, (102) is a primary / secondary air communication opening, and (103) is a damper. The operating rod, (104) is a damper actuating motor, (10
5) is a flame detection output transceiver, (106) is an oxygen concentration meter, and (107) is a flame stabilizer metal temperature measuring meter.
【００２３】本実施例においては、一次空気筒（０３）
にその内外を連通する一次・二次空気連絡口（１０２）
が設けられ、その一次・二次空気連絡口（１０２）に開
度調節ダンパ（１０１）が設けられて、一次空気筒（０
３）の出口から火炉内（１３）へ吹込む一次空気（２
３）の流量または流速が、燃焼状況に応じて調節される
ようになっている。また火炎検出器（０８）の出力を求
める火炎検出出力送受信計（１０５），保炎器（０７）
のメタル温度を検出する保炎器メタル温度測定計（１０
７），燃焼用空気（２２）の含有酸素濃度を検出する酸
素濃度計（１０６）が設置される。In this embodiment, the primary air cylinder (03)
Primary / secondary air communication port (102) that communicates with the inside and outside
Is provided, and an opening adjustment damper (101) is provided at the primary / secondary air communication port (102) of the primary air cylinder (0).
Primary air (2) blown into the furnace (13) from the outlet of (3)
The flow rate or flow velocity of 3) is adjusted according to the combustion situation. Further, a flame detection output transmitter / receiver (105) and a flame stabilizer (07) for obtaining the output of the flame detector (08).
Flame stabilizer metal temperature measuring instrument (10
7), an oxygen concentration meter (106) for detecting the oxygen concentration contained in the combustion air (22) is installed.
【００２４】このような構造のバーナの作用について、
次に説明する。まずは一次，二次および三次の各空気流
量調節用ダンパ（０９），（１０），（１１）の開度
を、大気（酸素濃度＝２１％）を使用して燃焼する場合
の最適流量配分（実際は各空気筒（０３），（０４），
（０５）出口流速を最適流速に設定）となるよう開度調
節し、一次・二次空気連絡口開度調節ダンパ（１０１）
は全閉として、従来のものと同様な要領で燃焼に入る。Regarding the operation of the burner having such a structure,
It will be described next. First, the opening degree of each of the primary, secondary and tertiary air flow rate adjusting dampers (09), (10) and (11) is adjusted to the optimum flow rate distribution when combustion is performed using the atmosphere (oxygen concentration = 21%) ( Actually, each air cylinder (03), (04),
(05) Set the outlet flow velocity to the optimum flow velocity) and adjust the opening to adjust the opening of the primary / secondary air communication port (101)
Is fully closed and enters combustion in the same manner as the conventional one.
【００２５】次に、バーナ風箱（０２）へ送られて来た
燃焼用空気（２２）の含有酸素濃度が酸素濃度計（１０
６）により測定されるので、この含有酸素濃度測定値に
基づいて、一次・二次空気連絡口開度調節ダンパ（１０
１）の開度を調節する。すなわち、燃焼用空気（２２）
の酸素濃度が低いと着火安定性が悪くなるので、一次・
二次空気連絡口開度調節ダンパ（１０１）を開く。そう
すると、一次空気筒（０３）へ送り込まれて来た一次空
気（２３）の一部は、一次・二次空気連絡口（１０２）
から一次空気筒（０３）および二次空気筒（０４）によ
って形成される環状断面通路へ送り込まれて、二次空気
（２４）と混合する。したがって、一次空気筒（０３）
出口部からそのまま火炉内（１３）へ吹込まれる一次空
気（２３）の量が減少し、その流速も低下して、着火安
定性が向上するのである。具体的には、例えば燃焼用空
気（２２）の含有酸素濃度が１８％（ｄｒｙ，ｖｏｌ．
％）以上ならば一次・二次空気連絡口開度調節ダンパ
（１０１）は全閉，濃度が１６％〜１８％ならば２５％
開，濃度１５％〜１６％なら５０％開，１５％以下では
全開というように、段階的に調節する。Next, the oxygen concentration in the combustion air (22) sent to the burner air box (02) is measured by the oxygen concentration meter (10).
6), the primary / secondary air communication port opening adjustment damper (10
Adjust the opening of 1). That is, combustion air (22)
If the oxygen concentration is low, the ignition stability will deteriorate, so
Open the secondary air communication opening adjustment damper (101). Then, a part of the primary air (23) sent into the primary air cylinder (03) is partially connected to the primary / secondary air communication port (102).
Is fed into the annular cross-section passage formed by the primary air cylinder (03) and the secondary air cylinder (04), and is mixed with the secondary air (24). Therefore, the primary air tube (03)
The amount of primary air (23) blown into the furnace (13) as it is from the outlet portion is reduced, the flow velocity is also reduced, and the ignition stability is improved. Specifically, for example, the oxygen concentration in the combustion air (22) is 18% (dry, vol.
%) Or more, the primary / secondary air communication opening adjustment damper (101) is fully closed, 25% if the concentration is 16% to 18%
Open, when the concentration is 15% to 16%, 50% open, and below 15%, fully open.
【００２６】上記のような含有酸素濃度に基づく一次・
二次空気連絡口開度調節ダンパ（１０１）の調節を行な
っても、なお燃焼継続中に火炎の着火状況が悪化して火
炎検出器（０８）出力が所定値以下となった場合は、燃
焼用空気（２２）の含有酸素濃度に関係なく一次・二次
空気連絡口開度調節ダンパ（１０１）を開いてゆき、一
次空気筒（０３）出口流速を低減させて火炎の着火状況
を改善する。火炎検出器（０８）の出力が所定値に達し
たら、それ以上開くのを止める。The primary value based on the oxygen content as described above
Even if the secondary air communication port opening adjustment damper (101) is adjusted, if the ignition status of the flame deteriorates and the output of the flame detector (08) becomes less than or equal to a predetermined value while combustion continues, combustion is performed. Regardless of the oxygen concentration of the working air (22), the primary / secondary air communication opening adjustment damper (101) is opened to reduce the flow velocity at the outlet of the primary air cylinder (03) to improve the ignition condition of the flame. . When the output of the flame detector (08) reaches a predetermined value, further opening is stopped.
【００２７】また、燃焼継続中に保炎器（０７）メタル
温度が所定値を越えた場合は、燃焼用空気（２２）の含
有酸素濃度に関係なく、一次・二次空気連絡口開度調節
ダンパ（１０１）を閉じてゆき、一次空気筒（０３）か
ら吹き出す一次空気（２３）流量を増加させて保炎器
（０７）メタル温度の低下を図る。保炎器（０７）のメ
タル温度が所定値以下に低下したら、それ以上閉じるの
を止める。If the metal temperature of the flame stabilizer (07) exceeds a predetermined value during continuous combustion, the opening degree of the primary / secondary air communication port is adjusted regardless of the oxygen concentration in the combustion air (22). The damper (101) is closed and the flow rate of the primary air (23) blown out from the primary air cylinder (03) is increased to lower the metal temperature of the flame stabilizer (07). When the metal temperature of the flame stabilizer (07) drops below a predetermined value, further closing is stopped.
【００２８】一次・二次空気連絡口調節ダンパ（１０
１）の上記一連の作動を自動化（手動も可能な）してお
けば、一次，二次および三次の各空気流量調節用ダンパ
（０９），（１０），（１１）を操作することなく、安
定したバーナ運転ができる。Primary / secondary air communication port adjusting damper (10
If the above series of operations of 1) is automated (manually possible), without operating the primary, secondary and tertiary air flow rate adjusting dampers (09), (10) and (11), Stable burner operation is possible.
【００２９】[0029]
【発明の効果】本発明によれば、燃焼継続中に何かの理
由により燃焼用空気（２２）の含有酸素濃度が急変して
も、自動的に、あるいは簡単な操作だけで、常に安全な
安定燃焼を継続することができる。According to the present invention, even if the concentration of oxygen contained in the combustion air (22) suddenly changes for some reason during the continuation of combustion, it is always safe by automatic or simple operation. Stable combustion can be continued.
【図１】図１は本発明のガス燃料低酸素バーナの一実施
例を示す縦断側面図である。FIG. 1 is a vertical side view showing an embodiment of a gas fuel low oxygen burner of the present invention.
【図２】図２は図１のII−II矢視横断面図である。FIG. 2 is a cross-sectional view taken along the line II-II of FIG.
【図３】図３は従来のガス燃料焚き低酸素バーナの一例
を示す縦断側面図である。FIG. 3 is a longitudinal side view showing an example of a conventional gas fuel-fired low oxygen burner.
【図４】図４は図３のIV−IV矢視正面図である。FIG. 4 is a front view taken along the line IV-IV in FIG.
【図５】図５は図３のＶ−Ｖ矢視横断面図である。5 is a transverse cross-sectional view taken along the line VV of FIG.
【図６】図６はガス燃料の空気比とＮＯx 発生量との関
係を示す図である。FIG. 6 is a diagram showing a relationship between an air ratio of a gas fuel and a NO x generation amount.
【図７】図７はガス燃料の着火限界を一次空気中の酸素
濃度と一次空気の流速との関係で示す図である。FIG. 7 is a diagram showing the ignition limit of gas fuel in relation to the oxygen concentration in the primary air and the flow velocity of the primary air.
【図８】図８は一次空気中の酸素濃度をパラメータとし
て一次空気流速と保炎器のメタル温度との関係を示す図
である。FIG. 8 is a diagram showing the relationship between the primary air flow velocity and the metal temperature of the flame stabilizer with the oxygen concentration in the primary air as a parameter.
（０１） ボイラ本体 （０２） バーナ風箱 （０３） 一次空気筒 （０４） 二次空気筒 （０５） 三次空気筒 （０６） ガイドパイプ （０７） 保炎器 （０８） 火炎検出器 （０９） 一次空気流量調節用ダンパ （１０） 二次空気流量調節用ダンパ （１１） 三次空気流量調節用ダンパ （１２） バーナスロート耐火材 （１３） 火炉内 （１４） 濃燃料ガスノズル （１５） 濃燃料ガスヘッダ （１６） 濃燃料ガス管 （１７） 淡燃料ガスノズル （１８） 淡燃料ガスヘッダ （１９） 淡燃料ガス管 （２０） 濃燃料ガス （２１） 淡燃料ガス （２２） 燃焼用空気 （２３） 一次空気 （２４） 二次空気 （２５） 淡燃料予混合気 （２６） 三次空気 （２７） 一次空気通路 （２８） 淡燃料予混合室 （２９） 濃燃料火炎 （３０） 淡燃料火炎 （１０１） 一次・二次空気連絡口開度調節ダンパ （１０２） 一次・二次空気連絡口 （１０３） ダンパ操作桿 （１０４） ダンパ作動モータ （１０５） 火炎検出出力送受信計 （１０６） 酸素濃度計 （１０７） 保炎器メタル温度測定計 (01) Boiler main body (02) Burner box (03) Primary air cylinder (04) Secondary air cylinder (05) Tertiary air cylinder (06) Guide pipe (07) Flame stabilizer (08) Flame detector (09) Damper for adjusting the primary air flow rate (10) Damper for adjusting the secondary air flow rate (11) Damper for adjusting the tertiary air flow rate (12) Burner throat refractory material (13) Inside the furnace (14) Rich fuel gas nozzle (15) Rich fuel gas header ( 16) Rich fuel gas pipe (17) Fresh fuel gas nozzle (18) Fresh fuel gas header (19) Fresh fuel gas pipe (20) Rich fuel gas (21) Fresh fuel gas (22) Combustion air (23) Primary air (24) ) Secondary air (25) Light fuel premixture (26) Tertiary air (27) Primary air passage (28) Light fuel premix chamber (29) Rich fuel flame (30) Light fuel flame (101 Primary / secondary air communication opening adjustment damper (102) Primary / secondary air communication opening (103) Damper operating rod (104) Damper operation motor (105) Flame detection output transceiver (106) Oxygen concentration meter (107) Flame stabilizer metal thermometer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中嶋 靖史 神戸市兵庫区和田崎町一丁目１番１号 三 菱重工業株式会社神戸造船所内 (72)発明者 保志 健 神戸市兵庫区和田崎町一丁目１番１号 三 菱重工業株式会社神戸造船所内 (72)発明者 福井 覚 神戸市兵庫区和田崎町一丁目１番１号 三 菱重工業株式会社神戸造船所内 (72)発明者 大栗 正治 長崎市深堀町５丁目717番地１ 長菱エン ジニアリング株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasushi Nakajima 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe Sanbishi Heavy Industries Ltd. Kobe Shipyard (72) Ken Hoshi, Wadazaki-cho, Hyogo-ku, Kobe 1-1-1 Sanryo Heavy Industries Co., Ltd.Kobe Shipyard (72) Inventor Satoshi Fukui 1-1-1 Wadazakicho, Hyogo-ku, Kobe City Sanryo Heavy Industry Co., Ltd.Kobe Shipyard (72) Inventor Masaharu Oguri Nagasaki-shi 5-717 Fukahori-cho 1 Inside Nagahishi Engineering Co., Ltd.
Claims (3)
気筒を囲んで同軸に配された二次空気筒と、同二次空気
筒を囲んで同軸に配された三次空気筒と、上記一次空気
筒内に装着された濃燃料ガスノズルと、上記一次空気筒
と上記二次空気筒により形成される環状断面通路内に装
着された淡燃料ガスノズルとを具え、上記濃燃料ガスノ
ズルおよび上記淡燃料ガスノズルから噴射されるガス燃
料を酸素濃度が大気よりも低い気体により燃焼させて、
上記濃燃料ガスノズルから噴射されるガス燃料に拡散炎
を、上記淡燃料ガスノズルから噴射されるガス燃料に予
混合炎を、それぞれ形成させるようにしたガス燃料低酸
素バーナにおいて、上記一次空気筒にその内外を連通す
る一次・二次空気連絡口を設けるとともに、同一次・二
次空気連絡口に開度調節ダンパを設けたことを特徴とす
るガス燃料低酸素バーナ。1. A primary air cylinder arranged around an axis, a secondary air cylinder coaxially surrounding the same primary air cylinder, and a tertiary air cylinder coaxially surrounding the same secondary air cylinder. And a rich fuel gas nozzle mounted in the primary air cylinder, and a light fuel gas nozzle mounted in an annular cross-sectional passage formed by the primary air cylinder and the secondary air cylinder, the rich fuel gas nozzle and Combusting the gas fuel injected from the fresh fuel gas nozzle with a gas whose oxygen concentration is lower than the atmosphere,
In the gas fuel low oxygen burner configured to form a diffusion flame in the gas fuel injected from the rich fuel gas nozzle and a premixed flame in the gas fuel injected from the light fuel gas nozzle, respectively, in the primary air cylinder, A gas-fuel low oxygen burner characterized in that a primary / secondary air communication port that communicates the inside and outside is provided, and an opening adjustment damper is provided at the same primary / secondary air communication port.
おいて、火炎検出器の出力，保炎器のメタル温度および
上記気体の含有酸素濃度に基づいて、上記開度調節ダン
パを制御することを特徴とするガス燃料低酸素バーナの
制御方法。2. The gas fuel low oxygen burner according to claim 1, wherein the opening adjustment damper is controlled based on the output of the flame detector, the metal temperature of the flame stabilizer and the oxygen concentration of the gas. A method for controlling a gas-fueled low oxygen burner, which is characterized.
は上記含有酸素濃度に関係なく上記開度調節ダンパを開
いてゆくとともに、上記保炎器のメタル温度が所定値以
上の時は上記含有酸素濃度に関係なく上記開度調節ダン
パを閉じてゆくことを特徴とする請求項２記載のガス燃
料低酸素バーナの制御方法。3. When the output of the flame detector is below a predetermined value, the opening adjustment damper is opened regardless of the oxygen concentration, and when the metal temperature of the flame stabilizer is above a predetermined value. 3. The method for controlling a gas fuel low oxygen burner according to claim 2, wherein the opening adjustment damper is closed regardless of the contained oxygen concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02663093A JP3150474B2 (en) | 1993-02-16 | 1993-02-16 | Control method of gas fuel low oxygen burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02663093A JP3150474B2 (en) | 1993-02-16 | 1993-02-16 | Control method of gas fuel low oxygen burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06241416A true JPH06241416A (en) | 1994-08-30 |
| JP3150474B2 JP3150474B2 (en) | 2001-03-26 |
Family
ID=12198775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02663093A Expired - Fee Related JP3150474B2 (en) | 1993-02-16 | 1993-02-16 | Control method of gas fuel low oxygen burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3150474B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100645351B1 (en) * | 2005-01-18 | 2006-11-14 | 에어 프로덕츠 앤드 케미칼스, 인코오포레이티드 | Emulsion atomizer nozzle and burner, and method for oxy-fuel burner applications |
| JP2011112344A (en) * | 2009-11-30 | 2011-06-09 | Ihi Corp | Burner device for multi-fuel |
| JP2011117635A (en) * | 2009-12-01 | 2011-06-16 | Ihi Corp | Oil burner in burner device for many kinds of fuels |
| CN103307601A (en) * | 2013-07-10 | 2013-09-18 | 陈伦福 | Induced air type combustor |
| CN107620961A (en) * | 2017-11-02 | 2018-01-23 | 上海华之邦科技股份有限公司 | The novel super-low nitrogen combustion apparatus that a kind of non-premixed combustion and premixed combustion are combined |
-
1993
- 1993-02-16 JP JP02663093A patent/JP3150474B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100645351B1 (en) * | 2005-01-18 | 2006-11-14 | 에어 프로덕츠 앤드 케미칼스, 인코오포레이티드 | Emulsion atomizer nozzle and burner, and method for oxy-fuel burner applications |
| JP2011112344A (en) * | 2009-11-30 | 2011-06-09 | Ihi Corp | Burner device for multi-fuel |
| JP2011117635A (en) * | 2009-12-01 | 2011-06-16 | Ihi Corp | Oil burner in burner device for many kinds of fuels |
| CN103307601A (en) * | 2013-07-10 | 2013-09-18 | 陈伦福 | Induced air type combustor |
| CN107620961A (en) * | 2017-11-02 | 2018-01-23 | 上海华之邦科技股份有限公司 | The novel super-low nitrogen combustion apparatus that a kind of non-premixed combustion and premixed combustion are combined |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3150474B2 (en) | 2001-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2528894B2 (en) | Gas turbine combustor | |
| US5339635A (en) | Gas turbine combustor of the completely premixed combustion type | |
| US6843185B1 (en) | Burner with oxygen and fuel mixing apparatus | |
| JPH04227404A (en) | Low nox burner and usage thereof | |
| KR100231667B1 (en) | Combustion burner and its combustion method in furnace | |
| US5806299A (en) | Process and apparatus for quickly switching over from premix combustion to diffusion combustion in a gas turbine | |
| US11175034B2 (en) | Burner and air supply assembly for horizontal immersion tube boilers | |
| KR102494767B1 (en) | Industrial furnace and industrial furnace ignition method | |
| JP3886653B2 (en) | Ignition torch for burner | |
| JP4140774B2 (en) | Burner tip and seal to optimize burner performance | |
| JPH06241416A (en) | Gas fuel low oxygen burner and control method thereof | |
| JP4103722B2 (en) | Multistage tubular flame burner and its combustion control method | |
| JP2001041413A (en) | Liquid fuel burning burner | |
| JPH0921507A (en) | Pulverized coal firing method and its apparatus and air swirling device | |
| JP4926915B2 (en) | Method and apparatus for preventing backfire of partially premixed burner | |
| JP2002303406A (en) | High speed jet type diffusion combustion type burner | |
| KR101595678B1 (en) | Tubular flame burner | |
| JP2544515B2 (en) | Gas combustor | |
| JP3272447B2 (en) | Burner for gas fuel | |
| KR0126904B1 (en) | LOW NOx BURNER | |
| JPH0749221Y2 (en) | Exhaust gas reburn burner | |
| JPH06101808A (en) | Premixing combustion device and combustion control thereof | |
| JP2006329480A (en) | Combustion furnace device and combustion method | |
| JPH07119492A (en) | Combustion device for gas turbine and control method therefor | |
| EP1915573A1 (en) | Method and arrangement for monitoring a burner. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20001219 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080119 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090119 Year of fee payment: 8 |
|
| LAPS | Cancellation because of no payment of annual fees |