JPH07103435A - Combustion method for regenerative randiant tube burner - Google Patents

Combustion method for regenerative randiant tube burner

Info

Publication number
JPH07103435A
JPH07103435A JP5277388A JP27738893A JPH07103435A JP H07103435 A JPH07103435 A JP H07103435A JP 5277388 A JP5277388 A JP 5277388A JP 27738893 A JP27738893 A JP 27738893A JP H07103435 A JPH07103435 A JP H07103435A
Authority
JP
Japan
Prior art keywords
combustion
burner
heat storage
exhaust gas
heat
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
Application number
JP5277388A
Other languages
Japanese (ja)
Other versions
JP2766451B2 (en
Inventor
Yoshimoto Fujii
良基 藤井
Hiroaki Sato
博明 佐藤
Ryoichi Tanaka
良一 田中
Mamoru Matsuo
護 松尾
Atsushi Sudo
淳 須藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Furnace Co Ltd
JFE Engineering Corp
Original Assignee
Nippon Furnace Co Ltd
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Furnace Co Ltd, NKK Corp, Nippon Kokan Ltd filed Critical Nippon Furnace Co Ltd
Priority to JP5277388A priority Critical patent/JP2766451B2/en
Publication of JPH07103435A publication Critical patent/JPH07103435A/en
Application granted granted Critical
Publication of JP2766451B2 publication Critical patent/JP2766451B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Landscapes

  • Gas Burners (AREA)

Abstract

PURPOSE:To eliminate the need for exhaust gas purge required in switching combustion of a regenerative radiant tube burner and prevent imperfect combustion. CONSTITUTION:Burners (main burner units (nozzle 4) are alternately fired and during non-conbustion time of the burners, combustion exhaust gas sensible heat which passes through their heat reservoirs 2 is accumlated on the heat reservoirs 2. In terms of a combustion side burner, the gas is burned at an air ratio of 1:1 when the combustion is started. For some time after the start of combustion, the air ratio is unchanged and the combustion is continued at the definite air ratio of 1:1. Then, after a definite time is over, the air ratio is changed to 2:1 before the combustion is changed over. After the concentration of oxygen in the combustion exhaust gas exceeds 10%, the combustion of the burners is changed over from the combustion burner side to non- combustion burner side. When starting combustion after the change over, the concentration of oxygen in the remaining combustion exhaust gas will exceed 10%, which prevents the generation of imperfect combustion even when it is used for the combustion air. This construction makes it possible to fire the burners alternately without purging when the combustion is switched.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、工業用加熱炉、熱処
理炉等の熱源に用いられるラジアントチューブバーナに
関するものである。更に詳述すると、ラジアントチュー
ブ(放射管)の両端の各々に、蓄熱体を有する一対のバ
ーナを設け、各々のバーナを交互に燃焼させて排出され
る燃焼排ガスの保有する顕熱を蓄熱体で回収し、その熱
を燃焼用空気に放出する形式の、蓄熱式ラジアントチュ
ーブバーナの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 radiant tube burner used as a heat source for industrial heating furnaces, heat treatment furnaces and the like. More specifically, a pair of burners having a heat storage body is provided at each of both ends of the radiant tube (radiant tube), and the sensible heat of the combustion exhaust gas discharged by alternately burning each burner is stored in the heat storage body. The present invention relates to a combustion method of a heat storage type radiant tube burner of a type of recovering and releasing the heat to combustion air.

【0002】[0002]

【従来の技術】近年、燃焼排ガスから相当量の熱量を回
収して熱効率を高めるべく、燃焼用空気の予熱技術が開
発されている。例えば、米国特許第4604051 号公報、特
開平1-219412号公報、特開平2-254210号公報等には、ラ
ジアントチューブの両端の各々に蓄熱体を有するバーナ
を設け、両端のバーナを交互に燃焼させてその燃焼排ガ
スを燃焼させていないバーナ側の蓄熱体を通して排出す
るようにし、前記蓄熱体に蓄熱された燃焼排ガスの顕熱
を、次に燃焼する際、燃焼用空気が蓄熱体を通ることに
より抜熱し、燃焼用空気を予熱する蓄熱式ラジアントチ
ューブバーナが提案されている(以下、「先行技術1」
という)。
2. Description of the Related Art In recent years, a technique for preheating combustion air has been developed in order to recover a considerable amount of heat from combustion exhaust gas and improve thermal efficiency. For example, in U.S. Pat.No. 4,640,501, Japanese Patent Laid-Open No. 1-219412, Japanese Patent Laid-Open No. 2-254210, etc., burners having heat storage bodies are provided at both ends of a radiant tube, and burners at both ends are burned alternately. Then, the combustion exhaust gas is discharged through the heat storage body on the burner side which is not burned, and when the sensible heat of the combustion exhaust gas stored in the heat storage body is burned next, the combustion air passes through the heat storage body. A heat storage type radiant tube burner that removes heat by heating and preheats combustion air has been proposed (hereinafter referred to as "Prior Art 1").
That).

【0003】米国特許第4604051 号公報を例にとり説明
する。図8は同公報に開示された蓄熱式ラジアントチュ
ーブバーナを示す系統図である。図8に示すように、ラ
ジアントチューブ101 内に突出する燃料ノズル103 を設
け、蓄熱体102 を通して燃焼用空気の供給あるいは燃焼
排ガスの排出が実施されるようにしたものである。図8
中に示す符号105 は炉壁、106 は送風機、107 は四方切
替弁(四方回転弁)、そして、108 はエゼクターであ
る。
An example will be described with reference to US Pat. No. 4,460,501. FIG. 8 is a system diagram showing a heat storage type radiant tube burner disclosed in the publication. As shown in FIG. 8, a fuel nozzle 103 protruding into the radiant tube 101 is provided so that combustion air is supplied or combustion exhaust gas is discharged through the heat storage body 102. Figure 8
Reference numeral 105 shown therein is a furnace wall, 106 is a blower, 107 is a four-way switching valve (four-way rotary valve), and 108 is an ejector.

【0004】[0004]

【発明が解決しようとする課題】先行技術1に示す蓄熱
式ラジアントチューブバーナは、蓄熱体から四方切替弁
(燃焼用空気と燃焼排ガスの流路を切り換える装置)ま
での間の配管中の流体が切替毎に、燃焼用空気または燃
焼排ガスに切り替わる。特に燃焼用空気を流し始める時
は、初めに蓄熱体および、蓄熱体から四方切替弁までの
間の配管中に残存する燃焼排ガスがバーナ部に流入する
ため、燃焼切替時に、四方切替弁が流路切替完了と同時
にバーナに燃料を噴射すると、蓄熱体および、蓄熱体か
ら四方切替弁までの間の配管中に残存する燃焼排ガス
(ほとんど酸素がない)中に燃料を投入することにな
り、前記残存燃焼排ガスがバーナ部に流入する間は燃料
が不完全燃焼し未燃ガスを排出することになる。即ち、
投入燃料の発熱エネルギーを有効利用できないばかり
か、未燃ガスが煙道で燃焼、爆発する危険性がある。
In the heat storage type radiant tube burner shown in the prior art 1, the fluid in the pipe between the heat storage body and the four-way switching valve (device for switching the flow path of combustion air and combustion exhaust gas) is Each time it switches, it switches to combustion air or combustion exhaust gas. Especially when starting the flow of combustion air, the combustion exhaust gas remaining in the heat storage body and the pipe between the heat storage body and the four-way switching valve first flows into the burner section, so the four-way switching valve flows when switching combustion. When fuel is injected into the burner at the same time as the passage switching is completed, the fuel is injected into the heat storage body and the combustion exhaust gas (there is almost no oxygen) remaining in the pipe between the heat storage body and the four-way switching valve. While the residual combustion exhaust gas flows into the burner section, the fuel is incompletely burned and unburned gas is discharged. That is,
Not only can the heat energy of the input fuel not be used effectively, there is the danger that unburned gas will burn and explode in the flue.

【0005】そこで、燃焼切替時の燃焼側バーナへの燃
料投入は、四方切替弁が流路切替完了後、数秒間燃料投
入せず、燃焼用空気のみを流して蓄熱体から四方切替弁
までの間の配管中に残存する燃焼排ガスを排出(「排ガ
スパージ」という)し、その後、燃料を投入することで
上記未燃損失防止、未燃ガスの煙道燃焼、爆発の防止を
図っている。
Therefore, when the fuel is switched to the combustion side, the fuel is not injected into the burner on the combustion side for several seconds after the passage switching of the four-way switching valve is completed. Only the combustion air is allowed to flow from the heat storage body to the four-way switching valve. Combustion exhaust gas remaining in the piping between them is discharged (called "exhaust gas purge"), and then fuel is injected to prevent the above-mentioned unburned loss, flue combustion of unburned gas, and explosion.

【0006】しかしながら、前述の排ガスパージを用い
る方法には、以下のような欠点がある。蓄熱式ラジアン
トチューブの燃焼切替サイクルタイムが30秒切替で、燃
焼排ガスバージ時間が3秒の場合、燃料投入時間は27秒
となり、ラジアントチューブ両端のバーナが燃焼しない
デッドタイムが燃焼時間の10%を占めることとなる。従
って、1時間当たり10万キロカロリーの燃料を投入する
には、1時間当たり11万キロカロリー/hのバーナを設
置する必要がある。エンジニアリング上の制限によって
は、多数の蓄熱式ラジアントチューブを1つの四方切替
弁で燃焼切替を行う場合、蓄熱体から四方切替弁までの
間の配管が長くなり、残存燃焼排ガス量が増大するた
め、更に燃焼排ガスバージ時間が長く必要になり、デッ
ドタイムが長くなり、前述のようにバーナ容量が増大す
る。そのことにより、燃料、空気、燃焼排ガスの配管、
および、バーナ等の各機器が大型化し、設備費が増大す
る。
However, the above-mentioned method using the exhaust gas purge has the following drawbacks. When the combustion switching cycle time of the heat storage type radiant tube is 30 seconds and the combustion exhaust gas barge time is 3 seconds, the fuel injection time is 27 seconds and the dead time when the burners at both ends of the radiant tube do not burn 10% of the burning time. Will occupy. Therefore, in order to input 100,000 kcal / hour of fuel, it is necessary to install a burner of 110,000 kcal / h per hour. Due to engineering restrictions, when performing combustion switching for a large number of heat storage radiant tubes with one four-way switching valve, the piping between the heat storage body and the four-way switching valve becomes longer, and the amount of residual combustion exhaust gas increases, Further, the combustion exhaust gas barge time becomes long, the dead time becomes long, and the burner capacity increases as described above. As a result, fuel, air, combustion exhaust gas piping,
In addition, the equipment such as the burner becomes large, and the equipment cost increases.

【0007】燃焼切替サイクルタイムを延長すると、蓄
熱体での蓄熱容量を大きくせねばならず、そのため蓄熱
体が大型化し、設置スペースを広くする必要があり、蓄
熱体の大型化によりメンテナンススペースも広く確保す
る必要があり、炉が大型化し設備費が増大する。また、
ラジアントチューブの片側での燃焼時間が延長されラジ
アントチューブ長手方向の温度分布が大きくなり、ラジ
アントチューブの寿命が短くなる。または、これに対処
するための材質向上によりラジアントチューブ費用が高
くなる。更に、残存燃焼排ガスおよびパージ空気は、蓄
熱体を通過し、更にはラジアントチューブ内にも流入す
るため、蓄熱体が冷却され、ラジアントチューブも冷却
され、熱損失が増大する。
[0007] When the combustion switching cycle time is extended, the heat storage capacity of the heat storage body must be increased. Therefore, the heat storage body must be large in size and the installation space must be widened. It is necessary to secure it, and the size of the furnace will increase and equipment costs will increase. Also,
The combustion time on one side of the radiant tube is extended, the temperature distribution in the longitudinal direction of the radiant tube is increased, and the life of the radiant tube is shortened. Alternatively, the cost of the radiant tube increases due to the improvement of the material for coping with this. Further, the residual combustion exhaust gas and the purge air pass through the heat storage body and further flow into the radiant tube, so that the heat storage body is cooled, the radiant tube is also cooled, and heat loss increases.

【0008】この発明は、上記のような問題点を解決す
るためになされたものであって、その目的は、燃焼切替
時の排ガスパージ時間、即ち、デッドタイム無しに切替
燃焼を行ない、不完全燃焼を防止し、安全性の向上、設
備の大型化を防止できる蓄熱式ラジアントチューブバー
ナの燃焼方法を提供することにある。
The present invention has been made in order to solve the above problems, and its purpose is to perform switching combustion without exhaust gas purging time at the time of switching combustion, that is, dead time, and to be incomplete. An object of the present invention is to provide a combustion method of a heat storage type radiant tube burner capable of preventing combustion, improving safety, and preventing enlargement of equipment.

【0009】[0009]

【課題を解決するための手段】我々は、上記の課題を解
決するために鋭意研究を重ねた。その結果、上記の目的
は、残存する燃焼排ガス中の酸素濃度を高め、残存燃焼
排ガス中の酸素により燃料を燃焼させることにより達成
されることを知見した。
[Means for Solving the Problems] We have conducted extensive studies to solve the above problems. As a result, it has been found that the above object can be achieved by increasing the oxygen concentration in the remaining combustion exhaust gas and burning the fuel with the oxygen in the residual combustion exhaust gas.

【0010】この発明は、上記の知見に基づいてなされ
たものであり、この発明の要旨は、下記の通りである。
本願第1発明は、ラジアントチューブの両端の各々にバ
ーナを配置し、前記バーナの各々は燃焼用空気および燃
焼排ガスが通過する蓄熱体を有し、前記バーナの各々を
交互に燃焼させ、バーナが非燃焼時にそのバーナの蓄熱
体を通過する燃焼排ガスの熱を前記蓄熱体に伝熱、蓄熱
させ、バーナが燃焼時にその蓄熱体に蓄熱された熱を通
過する燃焼用空気が抜熱し予熱されるサイクルを繰り返
す蓄熱式ラジアントチューブバーナの燃焼方法におい
て、一方のバーナの燃焼開始時から空気比1程度で燃焼
し、次いで、燃焼終了時直前から燃焼終了時まで2以上
の空気比で燃焼し、次いで、他方のバーナへ燃焼切替を
行うことに特徴を有するものである。
The present invention was made based on the above findings, and the gist of the present invention is as follows.
1st invention of this application arrange | positions a burner at each of both ends of a radiant tube, each said burner has a heat storage body through which combustion air and combustion exhaust gas pass, and burns each said burner alternately, The heat of the combustion exhaust gas passing through the heat storage body of the burner at the time of non-combustion is transferred to the heat storage body to store heat, and the combustion air passing through the heat stored in the heat storage body at the time of combustion is deheated and preheated. In a combustion method of a regenerative radiant tube burner that repeats a cycle, one burner burns at an air ratio of about 1 from the start of combustion, then burns at an air ratio of 2 or more from immediately before the end of combustion to the end of combustion, and then The feature is that the combustion is switched to the other burner.

【0011】本願第2発明は、ラジアントチューブの両
端の各々にバーナを配置し、前記バーナの各々は燃焼用
空気および燃焼排ガスが通過する蓄熱体を有し、前記バ
ーナの各々を交互に燃焼させ、バーナが非燃焼時にその
バーナの蓄熱体を通過する燃焼排ガスの熱を前記蓄熱体
に伝熱、蓄熱させ、バーナが燃焼時にその蓄熱体に蓄熱
された熱を通過する燃焼用空気が抜熱し予熱されるサイ
クルを繰り返す蓄熱式ラジアントチューブバーナの燃焼
方法において、一方のバーナの燃焼開始時から燃焼終了
時までの間に空気比を1程度から徐々に変化させて前記
燃焼終了時には2以上の空気比で燃焼し、次いで、他方
のバーナへ燃焼切替を行うことに特徴を有するものであ
る。
In the second invention of the present application, burners are arranged at both ends of the radiant tube, and each of the burners has a heat storage body through which combustion air and combustion exhaust gas pass, and each of the burners is burned alternately. When the burner is not burning, the heat of the combustion exhaust gas passing through the heat storage body of the burner is transferred to the heat storage body to store the heat, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is removed. In a combustion method of a heat storage type radiant tube burner that repeats a cycle of preheating, an air ratio is gradually changed from about 1 between the start of combustion and the end of combustion of one burner, and two or more air is burned at the end of combustion. It is characterized in that it burns at a ratio and then switches to the other burner.

【0012】本願第3発明は、ラジアントチューブの両
端の各々にバーナを配置し、前記バーナの各々は燃焼用
空気および燃焼排ガスが通過する蓄熱体を有し、前記バ
ーナの各々を交互に燃焼させ、バーナが非燃焼時にその
バーナの蓄熱体を通過する燃焼排ガスの熱を前記蓄熱体
に伝熱、蓄熱させ、バーナが燃焼時にその蓄熱体に蓄熱
された熱を通過する燃焼用空気が抜熱し予熱されるサイ
クルを繰り返す蓄熱式ラジアントチューブバーナの燃焼
方法において、一方のバーナの燃焼開始時から空気比1
程度で燃焼し、次いで、所定時間経過後2以上の空気比
で燃焼し、次いで、前記燃焼排ガス中酸素濃度が10%以
上となった時に燃焼終了し他方のバーナへ燃焼切替を行
うことに特徴を有するものである。
In the third invention of the present application, burners are arranged at both ends of the radiant tube, each of the burners has a heat storage body through which combustion air and combustion exhaust gas pass, and each of the burners is burned alternately. When the burner is not burning, the heat of the combustion exhaust gas passing through the heat storage body of the burner is transferred to the heat storage body to store the heat, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is removed. In the combustion method of the heat storage type radiant tube burner that repeats the cycle of preheating, the air ratio is 1
Combustion at a certain level, then at a ratio of 2 or more after a lapse of a predetermined time, then when the oxygen concentration in the combustion exhaust gas becomes 10% or more, the combustion ends and the combustion is switched to the other burner. Is to have.

【0013】本願第4発明は、ラジアントチューブの両
端の各々にバーナを配置し、前記バーナの各々は燃焼用
空気および燃焼排ガスが通過する蓄熱体を有し、前記バ
ーナの各々を交互に燃焼させ、バーナが非燃焼時にその
バーナの蓄熱体を通過する燃焼排ガスの熱を前記蓄熱体
に伝熱、蓄熱させ、バーナが燃焼時にその蓄熱体に蓄熱
された熱を通過する燃焼用空気が抜熱し予熱されるサイ
クルを繰り返す蓄熱式ラジアントチューブバーナの燃焼
方法において、一方のバーナの燃焼開始時から空気比を
1程度から徐々に変化させながら所定時間経過後2以上
の空気比で燃焼し、次いで、前記燃焼排ガス中酸素濃度
が10%以上となった時に燃焼を終了し他方のバーナへ燃
焼切替を行うことに特徴を有するものである。
According to a fourth aspect of the present invention, burners are arranged at both ends of the radiant tube, each of the burners has a heat storage body through which combustion air and combustion exhaust gas pass, and each of the burners is burned alternately. When the burner is not burning, the heat of the combustion exhaust gas passing through the heat storage body of the burner is transferred to the heat storage body to store the heat, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is removed. In a combustion method of a heat storage type radiant tube burner that repeats a cycle of preheating, while gradually changing the air ratio from the start of combustion of one burner, it burns at an air ratio of 2 or more after a lapse of a predetermined time, and then, When the oxygen concentration in the combustion exhaust gas becomes 10% or more, the combustion is terminated and the combustion is switched to the other burner.

【0014】[0014]

【作用】本願第1発明の燃焼方法により、燃焼用空気
量、燃料投入量を測定、調整する機構を持ち、燃料の理
論空気量を予め求め、バーナでの燃焼が空気比を自在に
制御できる機能を持たせることで、通常燃焼時は空気比
1.0 程度で完全燃焼させ、燃焼切替時直前に空気比2.0
以上の燃焼を行ない、燃焼終了、即ち、燃焼切替時は蓄
熱体から四方切替弁までの間の配管に空気比1.0 以上に
相当する燃焼が行えるだけの酸素を保有する燃焼排ガス
で充満することが可能となり、デッドタイムが解消され
る(デッドタイムが不要となる)。燃焼切替直前の空気
比2.0 以上の燃焼を行う時間は、蓄熱体から四方切替弁
までの間の配管容量で決まる。また、空気比変更は、極
短時間で行なっても、本願第2発明の燃焼方法のよう
に、燃焼開始時から燃焼切替までの間の時間で徐々に行
なってもよい。
According to the combustion method of the first invention of the present application, it has a mechanism for measuring and adjusting the combustion air amount and the fuel input amount, the theoretical air amount of fuel is obtained in advance, and the combustion in the burner can freely control the air ratio. By providing a function, the air ratio during normal combustion
Complete combustion at about 1.0, and an air ratio of 2.0 immediately before switching to combustion.
When the above combustion is completed and combustion is completed, that is, when the combustion is switched, the piping between the heat storage element and the four-way switching valve can be filled with combustion exhaust gas that has enough oxygen to perform combustion equivalent to an air ratio of 1.0 or more. It becomes possible and dead time is eliminated (dead time becomes unnecessary). The time for combustion at an air ratio of 2.0 or more immediately before switching to combustion is determined by the pipe capacity between the heat storage element and the four-way switching valve. Further, the change of the air ratio may be performed in an extremely short time or may be gradually performed in the time from the start of combustion to the switching of combustion as in the combustion method of the second invention of the present application.

【0015】更に、本願第3、4発明の燃焼方法によ
り、四方切替弁での燃焼排ガス中の酸素濃度をチェック
する機能を持たせることで、燃焼用空気量、燃料投入量
を測定、空気比調整する機構の誤動作、即ち、残存燃焼
排ガス中酸素量不足状態の発生を回避でき、安全性が向
上する。
Further, the combustion method according to the third and fourth inventions of the present application has a function of checking the oxygen concentration in the combustion exhaust gas at the four-way switching valve, thereby measuring the combustion air amount and the fuel input amount, and the air ratio. The malfunction of the adjusting mechanism, that is, the occurrence of the insufficient amount of oxygen in the residual combustion exhaust gas can be avoided, and the safety is improved.

【0016】[0016]

【実施例】次に、この発明を図面に示す実施例に基づい
て説明する。 〔実施例1〕図1は、この発明の燃焼方法を実施するた
めの蓄熱式ラジアントチューブバーナの装置構成を示す
系統図である。図1に示すように、蓄熱式ラジアントチ
ューブバーナは、ラジアントチューブ1の両端の各々に
バーナを有している。バーナは、メインバーナ部(メイ
ンバーナ燃料ノズル4およびメインバーナ燃料ヘッダ
3)および蓄熱体2、およびそれらの燃料または空気の
供給調整装置を備えている。メインバーナ部および蓄熱
体2には、燃焼用空気系17および燃焼排ガス排気系18
が、四方切替弁6を介して選択的に接続可能となってお
り、ラジアントチューブ1の両端に設置されているメイ
ンバーナ部の各々を交互に燃焼させるようになってい
る。また、各バーナはパイロットバーナ5を備えてい
る。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described based on the embodiments shown in the drawings. [Embodiment 1] FIG. 1 is a system diagram showing an apparatus configuration of a heat storage type radiant tube burner for carrying out the combustion method of the present invention. As shown in FIG. 1, the heat storage type radiant tube burner has burners at both ends of the radiant tube 1. The burner includes a main burner section (main burner fuel nozzle 4 and main burner fuel header 3), a heat storage body 2, and a fuel or air supply adjustment device for these. A combustion air system 17 and a combustion exhaust gas exhaust system 18 are provided in the main burner section and the heat storage body 2.
However, it can be selectively connected via the four-way switching valve 6, and each of the main burner portions installed at both ends of the radiant tube 1 is alternately burned. Further, each burner is equipped with a pilot burner 5.

【0017】燃焼側のメインバーナ部における燃焼排ガ
スは、非燃焼側のメインバーナ部の蓄熱体2を通り同時
に燃焼排ガスの顕熱は非燃焼側の蓄熱体2に放出されこ
れにより蓄熱がなされ、この後、燃焼排ガスは排出され
る。燃焼側メインバーナ部では、蓄熱体2に燃焼用空気
を通し、上記のように蓄熱がなされた蓄熱体2に蓄積さ
れた熱を燃焼用空気が奪い(抜熱し)、予熱して高温の
予熱空気を燃焼側のメインバーナ部に供給する。本実施
例の場合、燃焼用空気は、押込送風機12によって供給さ
れ、燃焼排ガスは燃焼排ガス吸引ブロワ13によって吸引
排気するように構成されている。
The combustion exhaust gas in the main burner portion on the combustion side passes through the heat storage body 2 in the main burner portion on the non-combustion side, and at the same time, the sensible heat of the combustion exhaust gas is released to the heat storage body 2 on the non-combustion side to store heat. After this, the combustion exhaust gas is discharged. In the main burner on the combustion side, the combustion air is passed through the heat storage body 2, and the heat stored in the heat storage body 2 that has been stored as described above is taken away by the combustion air (heat is removed) and preheated to a high temperature. Air is supplied to the main burner on the combustion side. In the case of the present embodiment, the combustion air is supplied by the forced air blower 12, and the combustion exhaust gas is sucked and exhausted by the combustion exhaust gas suction blower 13.

【0018】ラジアントチューブ1の両端のパイロット
バーナ5、5の各々へ、燃料、空気を供給する系統20、
21が接続され、パイロットバーナ5、5の燃焼は、各々
のメインバーナ部の点消火に同期させても、または、常
時燃焼させてもよい。
A system 20 for supplying fuel and air to each of the pilot burners 5, 5 at both ends of the radiant tube 1.
21 is connected, and the combustion of the pilot burners 5, 5 may be synchronized with the point extinction of each main burner section, or may be always burned.

【0019】これら、各バーナ4、5の燃焼制御は、下
記の如くに行なわれる。即ち、各バーナ4、5の燃焼、
非燃焼、切替時間カウントおよび四方切替弁6の動作制
御等は、メインコントローラ23によって行われる。各バ
ーナ4、5の空気比制御は、個々の燃焼制御装置22、22
によっておこなわれる。
The combustion control of each of the burners 4 and 5 is performed as follows. That is, the combustion of each burner 4, 5.
Non-combustion, switching time counting, operation control of the four-way switching valve 6 and the like are performed by the main controller 23. The air ratio control of each burner 4, 5 is controlled by the individual combustion control device 22, 22.
It is done by.

【0020】なお、ラジアントチューブ1の形式は、I
型、U型、W型等の公知の形状の他、新規形状であって
も実施可能である。また、ラジアントチューブ1の材質
は、耐熱金属、セラミックス等の公知の材質の他、新規
材質であっても実施可能である。
The type of the radiant tube 1 is I
Other known shapes such as molds, U-shapes, W-shapes, etc., as well as new shapes can be implemented. Further, the material of the radiant tube 1 may be a known material such as heat-resistant metal or ceramics or a new material.

【0021】更に、蓄熱式ラジアントチューブバーナの
装置形式も、バーナ中心に燃料ノズルを持つ一般的な形
式、バーナ中心に燃料ノズルを持たないアウターガン形
式その他新たな形式のバーナであっても実施可能であ
る。
Further, the apparatus type of the heat storage type radiant tube burner can be implemented with a general type having a fuel nozzle in the center of the burner, an outer gun type without a fuel nozzle in the center of the burner, and other new type burners. Is.

【0022】次に、図1に示す装置によって行なわれる
本実施例の動作を説明する。図2は本実施例における動
作を示す説明図である。ラジアントチューブ1の両端の
メインバーナ部を各々AバーナおよびBバーナと表現す
る。燃焼切替毎にA、B各バーナが交互に切替わり燃焼
する。まず、Aバーナ側パイロットバーナ5に適量の燃
料と空気とを供給し、点火イグニッションの火花で点火
する。送風機12によって供給されるメインバーナ燃焼用
空気は、四方切替弁6、流量計測オリフィス8および燃
焼用空気流調弁7を経由し、蓄熱体2を通って予熱され
高温(700 〜1000℃)の予熱空気となりメインバーナ部
に供給され、メインバーナ燃料ノズル4から噴射される
燃料と反応し燃焼する。
Next, the operation of this embodiment performed by the apparatus shown in FIG. 1 will be described. FIG. 2 is an explanatory diagram showing the operation of this embodiment. The main burner portions at both ends of the radiant tube 1 are expressed as A burner and B burner, respectively. Each time the combustion is switched, the A and B burners are alternately switched and burned. First, the A-burner side pilot burner 5 is supplied with an appropriate amount of fuel and air, and is ignited by a spark of ignition ignition. The main burner combustion air supplied by the blower 12 passes through the four-way switching valve 6, the flow rate measurement orifice 8 and the combustion air flow regulating valve 7, and is preheated through the heat storage body 2 to a high temperature (700 to 1000 ° C.). It becomes preheated air and is supplied to the main burner portion, and reacts with the fuel injected from the main burner fuel nozzle 4 and burns.

【0023】燃焼開始時は、空気比1.0 程度とする。本
実施例では、空気比1.1 で燃焼させた。そして、燃焼開
始後しばらくは、空気比を1.1 で一定として燃焼する。
燃焼切替前、空気比を2.1 に変更し、燃焼切替時、Bバ
ーナ側の蓄熱体2から四方切替弁6までの間の配管中に
残存する燃焼排ガスは、その中に空気比1.0 程度の酸素
を含む燃焼排ガスとした。
At the start of combustion, the air ratio is about 1.0. In this example, combustion was performed at an air ratio of 1.1. Then, for a while after the start of combustion, combustion is performed with the air ratio kept constant at 1.1.
Before switching the combustion, the air ratio was changed to 2.1, and when the combustion was switched, the combustion exhaust gas remaining in the pipe between the B-burner side heat storage body 2 and the four-way switching valve 6 contained oxygen with an air ratio of about 1.0. The combustion exhaust gas containing

【0024】燃焼切替前の空気比変更タイミングは、設
備のエンジニアリング、即ち、配管容量で決まり、予
め、メインコントローラ23にタイムスケジュールを記憶
させ、メインバーナコントローラ22に指令信号を電送す
る。燃焼排ガスは、燃焼排ガス吸引ブロワ13によってB
バーナ側蓄熱体2を通り四方切替弁6を介して排出され
る。排出される燃焼排ガス顕熱は、Bバーナ側蓄熱体2
を通過する間に前記蓄熱体2に回収される。一定時間
後、メインコントローラ23よりAバーナからBバーナへ
の燃焼切替信号が電送される。即ち、四方切替弁6の流
路切替動作指示信号、Aバーナ側のメイン燃料遮断弁1
4、パイロット空気遮断弁15、パイロット燃焼遮断弁16
の各電磁弁の閉(OFF)信号、Bバーナ側のメイン燃料遮
断弁14、パイロット空気遮断弁15、パイロット燃焼遮断
弁16の各電磁弁の開(ON)信号、および、Bバーナ側パイ
ロット点火イグニッションON信号等を電送する。そのこ
とにより、バーナの燃焼がAバーナ側からBバーナ側に
切り替わり、Bバーナ側で前述したAバーナ側と同様の
動作を行う。このようにして、ラジアントチューブ1の
両端のメインバーナ部を交互に燃焼させる。
The timing of changing the air ratio before switching the combustion is determined by the engineering of the equipment, that is, the pipe capacity, and the time schedule is stored in the main controller 23 in advance and a command signal is transmitted to the main burner controller 22. The combustion exhaust gas is transferred to B by the combustion exhaust gas suction blower 13.
It passes through the burner-side heat storage body 2 and is discharged through the four-way switching valve 6. The sensible heat of the exhaust gas discharged is the B-burner side heat storage body 2
Is collected in the heat storage body 2 while passing through. After a certain period of time, a combustion switching signal from the A burner to the B burner is transmitted from the main controller 23. That is, the flow path switching operation instruction signal of the four-way switching valve 6, the main fuel cutoff valve 1 on the A burner side
4, pilot air shutoff valve 15, pilot combustion shutoff valve 16
(OFF) signal of each solenoid valve, main fuel cutoff valve 14 on the B burner side, pilot air cutoff valve 15, pilot combustion cutoff valve 16, each solenoid valve open (ON) signal, and B burner side pilot ignition Ignition ON signal is transmitted. As a result, the combustion of the burner is switched from the A burner side to the B burner side, and the B burner side performs the same operation as the above-mentioned A burner side. In this way, the main burner portions at both ends of the radiant tube 1 are alternately burned.

【0025】パイロットバーナ5、5は、AおよびBバ
ーナの燃焼、非燃焼のサイクルと同期させて点消火を繰
り返してもよいし、両端のパイロットバーナ5、5を常
時点火させてもよい。また、蓄熱体2通過後の予熱空気
温度を測定し(図示せず)、予熱空気が燃料を着火する
のに充分な温度まで予熱されていることを常時監視でき
ればパイロットバーナ5は消火してもよい。但し、炉内
温度変化等の外乱におって予熱空気が燃料を着火するの
に充分な温度まで予熱されない場合が起こり得るので、
予熱空気が燃料を着火するのに充分な温度まで予熱され
ない場合は、パイロットバーナ5が再点火する機能を持
たせる必要がある。
The pilot burners 5 and 5 may repeat the point extinction in synchronization with the combustion and non-combustion cycles of the A and B burners, or the pilot burners 5 and 5 at both ends may be constantly ignited. Even if the pilot burner 5 is extinguished, it is possible to measure the preheated air temperature after passing through the heat storage body 2 (not shown) and constantly monitor that the preheated air is preheated to a temperature sufficient to ignite the fuel. Good. However, there is a possibility that the preheated air may not be preheated to a temperature sufficient to ignite the fuel due to disturbance such as temperature change in the furnace.
If the preheated air is not preheated to a temperature sufficient to ignite the fuel, then the pilot burner 5 should be capable of reigniting.

【0026】更に、燃焼排ガス中の酸素濃度を酸素濃度
測定器11にて監視し、空気比2.1 の燃焼排ガス中酸素濃
度が11%に達しているか否かをチェックする機能と持た
せることにより、燃焼切替時の燃焼開始で不完全燃焼が
起こることを防止している。即ち、燃焼用空気量と燃料
投入量とは、各流量オリフィス8、10で軽量しており、
事前に求められている燃料の理論空気量とでバーナでの
燃焼用空気比は算出でき、一方、燃焼排ガス中の酸素濃
度(O2 %)より、空気比は一般的な下記簡易式 空気比=21/{ 21 − (O2 %)} で算出でき、燃焼制御の異常がチェックできる。
Furthermore, by providing a function of monitoring the oxygen concentration in the combustion exhaust gas with the oxygen concentration measuring device 11 and checking whether the oxygen concentration in the combustion exhaust gas with an air ratio of 2.1 has reached 11%, Incomplete combustion is prevented from occurring at the start of combustion when switching between combustion modes. That is, the amount of combustion air and the amount of fuel input are light at the flow rate orifices 8 and 10,
The combustion air ratio in the burner can be calculated with the theoretical air amount of the fuel that has been obtained in advance. On the other hand, from the oxygen concentration (O 2 %) in the combustion exhaust gas, the air ratio is a general simple formula = 21 / {21 - (O 2%)} can be calculated using the abnormal combustion control can be checked.

【0027】本実施例においては、燃焼排ガス中の酸素
濃度が目標値11%より低い場合は、燃焼用空気流調弁7
を開き、燃焼排ガス中酸素濃度が目標値になるように制
御する。この際、調整時間分切替タイミングを長くし、
同時に目標酸素濃度値に達した際の空気比を記憶し、次
回燃焼時の切替前空気比設定をその値に変更して運転を
継続し、メインコントローラ23で異常をアラームにて運
転者に知らせ、異常発生記録を残し、次回修理時に異常
原因解明し修理を行う。
In this embodiment, when the oxygen concentration in the combustion exhaust gas is lower than the target value of 11%, the combustion air flow control valve 7
Open and control so that the oxygen concentration in the combustion exhaust gas reaches the target value. At this time, lengthen the switching timing for the adjustment time,
At the same time, the air ratio when the target oxygen concentration value is reached is stored, the pre-switching air ratio setting at the time of the next combustion is changed to that value, and operation is continued, and the main controller 23 notifies the driver of an abnormality with an alarm. , Keep a record of occurrence of abnormality, and at the next repair, clarify the cause of the abnormality and perform repair.

【0028】更に、燃焼用空気流調弁7が全開でも燃焼
排ガス中酸素濃度の目標値が確保できない場合は、燃料
流調弁9にて燃料投入量を抑えることで燃焼排ガス中酸
素濃度を確保し、次回燃焼時から燃焼量を調整後の流量
で運転、切替前空気比設定をその値に変更して運転を継
続し、メインコントローラ23で異常をアラームにて運転
者に知らせ、異常発生記録を残し、次回修理時に異常原
因解明し修理を行う。
Further, if the target value of the oxygen concentration in the combustion exhaust gas cannot be secured even when the combustion air flow regulating valve 7 is fully opened, the fuel flow regulating valve 9 is used to suppress the amount of fuel input to secure the oxygen concentration in the combustion exhaust gas. Then, from the next combustion, the combustion amount will be adjusted and the operation will be continued, the air ratio setting before switching will be changed to that value, and the operation will be continued. Then, the cause of the abnormality will be clarified and repaired at the next repair.

【0029】但し、燃焼量が60%で燃焼停止のインター
ロックを導入している。また、燃焼排ガス中の酸素濃度
が目標値より高い場合は、特に流調弁への動作信号は出
さないが、メインコントローラ23で異常をアラームにて
運転者に知らせ、異常発生記録を残し、次回修理時に異
常原因解明し修理を行う。ここで示した数値は絶対的な
ものでなく、各々の適用設備にて任意の数値を用いてよ
い。
However, an interlock for stopping combustion when the combustion amount is 60% is introduced. Further, when the oxygen concentration in the combustion exhaust gas is higher than the target value, an operation signal to the flow control valve is not particularly output, but the main controller 23 informs the driver of the abnormality by an alarm and records the occurrence of the abnormality. At the time of repair, clarify the cause of the abnormality and perform repair. The numerical values shown here are not absolute, and arbitrary numerical values may be used in each applicable equipment.

【0030】〔実施例2〕図3は図1に示す装置によっ
て行なわれる本実施例における動作を示す説明図であ
る。本実施例は、図2と違い、燃焼サイクルタイム内で
空気比を変更して制御する方式である。図3は空気比を
直線的に徐々に上昇させる変更方法を採用している。こ
の空気比の変更は、図3に示すように直線的に徐々に空
気比を上昇させる変更方法に限らず、曲線的な変更方法
を採用することも可能である。即ち、図4から図7に示
す(a) 〜(d) のような一般的パターンなものから、新規
の変更方法でも適用できる。その他の動作は、実施例1
と同様である。
[Embodiment 2] FIG. 3 is an explanatory view showing an operation in this embodiment performed by the apparatus shown in FIG. Unlike the case of FIG. 2, the present embodiment is a method of controlling by changing the air ratio within the combustion cycle time. FIG. 3 adopts a modification method in which the air ratio is gradually increased linearly. The change of the air ratio is not limited to the change method of gradually increasing the air ratio linearly as shown in FIG. 3, and it is also possible to adopt a curved change method. That is, from the general patterns such as (a) to (d) shown in FIGS. 4 to 7, it is possible to apply a new changing method. Other operations are the same as those of the first embodiment.
Is the same as.

【0031】[0031]

【発明の効果】以上の説明から明らかなように、この発
明の方法によれば、燃焼用空気量、燃料投入量を測定、
調整する機構を備え、燃料の理論空気量を予め求め、バ
ーナでの燃焼が空気比を自在に制御できる機能を持たせ
ることで、通常燃焼時は空気比1.0 程度で完全燃焼さ
せ、燃焼切替直前に空気比2.0 以上の燃焼を行ない、燃
焼終了、即ち、燃焼切替時は蓄熱端から四方切替弁まで
の間に配管に空気比1.0 以上に相当する燃焼が行えるだ
けの酸素を保有する燃焼排ガスで充満することが可能と
なり、デッドタイムが解消され、更に、四方切替弁での
燃焼排ガス中の酸素濃度をチェックする機能を持たせる
ことで、燃焼用空気量、燃料投入量を測定、空気比調整
する機構の誤動作、即ち、残存燃焼排ガス中酸素量不足
状態の発生を回避でき安全性が向上し、設備の大型化を
防止でき、かくして、工業上有用な効果がもたらされ
る。
As is apparent from the above description, according to the method of the present invention, the combustion air amount and the fuel input amount are measured,
With a mechanism for adjustment, the theoretical air amount of fuel is calculated in advance, and the combustion in the burner has the function of freely controlling the air ratio, so that during normal combustion, complete combustion is performed at an air ratio of about 1.0, and immediately before switching to combustion. At the end of combustion, that is, at the time of combustion switching, combustion exhaust gas that has enough oxygen in the pipe between the heat storage end and the four-way switching valve to perform combustion equivalent to an air ratio of 1.0 or more. It becomes possible to fill, dead time is eliminated, and the function to check the oxygen concentration in the combustion exhaust gas at the four-way switching valve is measured, the combustion air amount and the fuel input amount are measured, and the air ratio is adjusted. The malfunction of the mechanism, that is, the occurrence of the insufficient amount of oxygen in the residual combustion exhaust gas can be avoided, the safety is improved, and the enlargement of the equipment can be prevented, and thus the industrially useful effect is brought about.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の燃焼方法を実施するための蓄熱式ラ
ジアントチューブバーナの装置構成を示す系統図であ
る。
FIG. 1 is a system diagram showing a device configuration of a heat storage type radiant tube burner for carrying out a combustion method of the present invention.

【図2】この発明の実施例1における動作を示す説明図
である。
FIG. 2 is an explanatory diagram showing an operation in the first embodiment of the present invention.

【図3】この発明の実施例2における動作を示す説明図
である。
FIG. 3 is an explanatory diagram showing an operation in the second embodiment of the present invention.

【図4】空気比の変更パターンを示すグラフである。FIG. 4 is a graph showing a change pattern of an air ratio.

【図5】空気比の変更パターンを示すグラフである。FIG. 5 is a graph showing a change pattern of an air ratio.

【図6】空気比の変更パターンを示すグラフである。FIG. 6 is a graph showing a change pattern of an air ratio.

【図7】空気比の変更パターンを示すグラフである。FIG. 7 is a graph showing a change pattern of an air ratio.

【図8】従来の蓄熱式ラジアントチューブバーナの1例
を示す系統図である。
FIG. 8 is a system diagram showing an example of a conventional heat storage type radiant tube burner.

【符号の説明】[Explanation of symbols]

1 ラジアントチューブ 2 蓄熱体 3 メインバーナ燃料ヘッダ 4 メインバーナ燃料ノズル 5 パイロットバーナ 6 四方切替弁 7 メイン燃焼用空気流量調整弁 8 メイン燃焼用空気流量測定器(オリフィス) 9 メイン燃料流量調整弁 10 メイン燃料流量測定器(オリフィス) 11 燃焼排ガス中酸素濃度測定器 12 燃焼用空気押込送風機 13 燃焼排ガス吸引ブロワ 14 メイン燃料遮断弁(電磁弁) 15 パイロットバーナ燃焼用空気遮断弁(電磁弁) 16 パイロット燃焼遮断弁(電磁弁) 17 メインバーナ燃焼用空気系 18 燃焼排ガス排気系 19 メインバーナ燃料供給系 20 パイロットバーナ燃料供給系 21 パイロットバーナ燃焼用空気供給系 22 個々メインバーナ燃焼制御装置(コントローラ) 23 蓄熱式ラジアントチューブバーナメイン制御装置
(コントローラ) 24 炉壁 A14 メイン燃料遮断弁(電磁弁)制御信号 A15 パイロットバーナ燃焼用空気遮断弁(電磁弁)制
御信号 A16 パイロット燃焼遮断弁(電磁弁)制御信号 B 四方弁切替弁制御信号 C メインコントローラからの各メインバーナ制御信号 D メイン燃焼用空気流量信号 E メイン燃焼用空気流量調整弁動作信号 F メイン燃料流量信号 G メイン燃料流量調整弁動作信号 H 燃焼排ガス中酸素濃度信号 101 ラジアントチューブ 102 蓄熱体 103 燃料ノズル 105 炉壁 106 送風機 107 四方切替弁(回転弁) 108 エゼクター
1 Radiant tube 2 Heat storage body 3 Main burner fuel header 4 Main burner fuel nozzle 5 Pilot burner 6 Four-way switching valve 7 Main combustion air flow rate control valve 8 Main combustion air flow rate measuring device (orifice) 9 Main fuel flow rate control valve 10 Main Fuel flow rate measuring device (orifice) 11 Oxygen concentration measuring device in combustion exhaust gas 12 Combustion air pushing blower 13 Combustion exhaust gas suction blower 14 Main fuel cutoff valve (solenoid valve) 15 Pilot burner Combustion air cutoff valve (solenoid valve) 16 Pilot combustion Shut-off valve (solenoid valve) 17 Main burner combustion air system 18 Combustion exhaust gas exhaust system 19 Main burner fuel supply system 20 Pilot burner fuel supply system 21 Pilot burner combustion air supply system 22 Individual main burner combustion control device (controller) 23 Heat storage Type radiant tube burner main controller (controller ) 24 Furnace wall A14 Main fuel cutoff valve (solenoid valve) control signal A15 Pilot burner combustion air cutoff valve (solenoid valve) control signal A16 Pilot combustion cutoff valve (solenoid valve) control signal B Four-way valve switching valve control signal C Main controller Main burner control signals from D Main combustion air flow rate signal E Main combustion air flow rate adjustment valve operation signal F Main fuel flow rate signal G Main fuel flow rate adjustment valve operation signal H Combustion exhaust gas oxygen concentration signal 101 Radiant tube 102 Heat storage element 103 Fuel nozzle 105 Furnace wall 106 Blower 107 Four-way switching valve (rotating valve) 108 Ejector

───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 良一 神奈川県横浜市鶴見区尻手二丁目1番53号 日本ファーネス工業株式会社内 (72)発明者 松尾 護 神奈川県横浜市鶴見区尻手二丁目1番53号 日本ファーネス工業株式会社内 (72)発明者 須藤 淳 神奈川県横浜市鶴見区尻手二丁目1番53号 日本ファーネス工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryoichi Tanaka 1-53, Shirute 2-chome, Tsurumi-ku, Yokohama-shi, Kanagawa Japan Furnace Industries Co., Ltd. No. 53 In Japan Furnace Industry Co., Ltd. (72) Inventor Atsushi Sudo 2-53, Shirate, Tsurumi-ku, Yokohama-shi, Kanagawa Inside Furnace Industry Co., Ltd.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 ラジアントチューブの両端の各々にバー
ナを配置し、前記バーナの各々は燃焼用空気および燃焼
排ガスが通過する蓄熱体を有し、前記バーナの各々を交
互に燃焼させ、バーナが非燃焼時にそのバーナの蓄熱体
を通過する燃焼排ガスの熱を前記蓄熱体に伝熱、蓄熱さ
せ、バーナが燃焼時にその蓄熱体に蓄熱された熱を通過
する燃焼用空気が抜熱し予熱されるサイクルを繰り返す
蓄熱式ラジアントチューブバーナの燃焼方法において、 一方のバーナの燃焼開始時から空気比1程度で燃焼し、
次いで、燃焼終了時直前から燃焼終了時まで2以上の空
気比で燃焼し、次いで、他方のバーナへ燃焼切替を行う
ことを特徴とする蓄熱式ラジアントチューブバーナの燃
焼方法。
1. A burner is arranged at each of both ends of a radiant tube, each burner has a heat storage body through which combustion air and combustion exhaust gas pass, and each of the burners is burned alternately, and A cycle in which the heat of the combustion exhaust gas passing through the heat storage body of the burner during combustion is transferred to the heat storage body to store the heat, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is deheated and preheated. In a combustion method of a heat storage type radiant tube burner that repeats
Next, a combustion method for a heat storage type radiant tube burner, characterized in that combustion is performed at an air ratio of 2 or more from immediately before the end of combustion to the end of combustion, and then the combustion is switched to the other burner.
【請求項2】 ラジアントチューブの両端の各々にバー
ナを配置し、前記バーナの各々は燃焼用空気および燃焼
排ガスが通過する蓄熱体を有し、前記バーナの各々を交
互に燃焼させ、バーナが非燃焼時にそのバーナの蓄熱体
を通過する燃焼排ガスの熱を前記蓄熱体に伝熱、蓄熱さ
せ、バーナが燃焼時にその蓄熱体に蓄熱された熱を通過
する燃焼用空気が抜熱し予熱されるサイクルを繰り返す
蓄熱式ラジアントチューブバーナの燃焼方法において、 一方のバーナの燃焼開始時から燃焼終了時までの間に空
気比を1程度から徐々に変化させて前記燃焼終了時には
2以上の空気比で燃焼し、次いで、他方のバーナへ燃焼
切替を行うことを特徴とする蓄熱式ラジアントチューブ
バーナの燃焼方法。
2. A burner is arranged at each of both ends of the radiant tube, each burner has a heat storage body through which combustion air and combustion exhaust gas pass, and each of the burners is burned alternately, and A cycle in which the heat of the combustion exhaust gas passing through the heat storage body of the burner during combustion is transferred to the heat storage body to store the heat, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is deheated and preheated. In the combustion method of a heat storage type radiant tube burner that repeats the above, the air ratio is gradually changed from about 1 from the start of combustion of one burner to the end of combustion, and the burner burns at an air ratio of 2 or more at the end of combustion. Then, the combustion method of the heat storage type radiant tube burner is characterized in that the combustion is switched to the other burner.
【請求項3】 ラジアントチューブの両端の各々にバー
ナを配置し、前記バーナの各々は燃焼用空気および燃焼
排ガスが通過する蓄熱体を有し、前記バーナの各々を交
互に燃焼させ、バーナが非燃焼時にそのバーナの蓄熱体
を通過する燃焼排ガスの熱を前記蓄熱体に伝熱、蓄熱さ
せ、バーナが燃焼時にその蓄熱体に蓄熱された熱を通過
する燃焼用空気が抜熱し予熱されるサイクルを繰り返す
蓄熱式ラジアントチューブバーナの燃焼方法において、 一方のバーナの燃焼開始時から空気比1程度で燃焼し、
次いで、所定時間経過後2以上の空気比で燃焼し、次い
で、前記燃焼排ガス中酸素濃度が10%以上となった時に
燃焼を終了し他方のバーナへ燃焼切替を行うことを特徴
とする蓄熱式ラジアントチューブバーナの燃焼方法。
3. A burner is arranged at each of both ends of the radiant tube, each burner has a heat storage body through which combustion air and combustion exhaust gas pass, and each of the burners is burned alternately, and A cycle in which the heat of the combustion exhaust gas passing through the heat storage body of the burner during combustion is transferred to the heat storage body to store the heat, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is deheated and preheated. In a combustion method of a heat storage type radiant tube burner that repeats the above, the combustion is performed at an air ratio of about 1 from the start of combustion of one burner,
Next, after a lapse of a predetermined time, combustion is carried out at an air ratio of 2 or more, then, when the oxygen concentration in the combustion exhaust gas becomes 10% or more, the combustion is terminated and the combustion is switched to the other burner. How to burn a radiant tube burner.
【請求項4】 ラジアントチューブの両端の各々にバー
ナを配置し、前記バーナの各々は燃焼用空気および燃焼
排ガスが通過する蓄熱体を有し、前記バーナの各々を交
互に燃焼させ、バーナが非燃焼時にそのバーナの蓄熱体
を通過する燃焼排ガスの熱を前記蓄熱体に伝熱、蓄熱さ
せ、バーナが燃焼時にその蓄熱体に蓄熱された熱を通過
する燃焼用空気が抜熱し予熱されるサイクルを繰り返す
蓄熱式ラジアントチューブバーナの燃焼方法において、 一方のバーナの燃焼開始時から空気比を1程度から徐々
に変化させながら所定時間経過後2以上の空気比で燃焼
し、次いで、前記燃焼排ガス中酸素濃度が10%以上とな
った時に燃焼を終了し他方のバーナへ燃焼切替を行うこ
とを特徴とする蓄熱式ラジアントチューブバーナの燃焼
方法。
4. A burner is arranged at each of both ends of the radiant tube, each burner has a heat storage body through which combustion air and combustion exhaust gas pass, and each of the burners is burned alternately, and A cycle in which the heat of the combustion exhaust gas passing through the heat storage body of the burner during combustion is transferred to the heat storage body to store the heat, and the combustion air passing through the heat stored in the heat storage body during combustion of the burner is deheated and preheated. In a combustion method of a heat storage type radiant tube burner which repeats the above, the air ratio is gradually changed from about 1 from the start of combustion of one burner, and after a predetermined time elapses, it is burned at an air ratio of 2 or more, and then in the combustion exhaust gas. A combustion method for a heat storage type radiant tube burner characterized by terminating combustion and switching combustion to the other burner when the oxygen concentration exceeds 10%.
JP5277388A 1993-10-12 1993-10-12 Combustion method of regenerative radiant tube burner Expired - Lifetime JP2766451B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5277388A JP2766451B2 (en) 1993-10-12 1993-10-12 Combustion method of regenerative radiant tube burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5277388A JP2766451B2 (en) 1993-10-12 1993-10-12 Combustion method of regenerative radiant tube burner

Publications (2)

Publication Number Publication Date
JPH07103435A true JPH07103435A (en) 1995-04-18
JP2766451B2 JP2766451B2 (en) 1998-06-18

Family

ID=17582842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5277388A Expired - Lifetime JP2766451B2 (en) 1993-10-12 1993-10-12 Combustion method of regenerative radiant tube burner

Country Status (1)

Country Link
JP (1) JP2766451B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010004969A1 (en) 2008-07-07 2010-01-14 スチールプランテック株式会社 Radiant tube burner device and heat storing element unit capable of being mounted to radiant tube burner
KR20180038453A (en) 2015-08-13 2018-04-16 쥬가이로 고교 가부시키가이샤 Annunciator of maintenance time of regenerator of regenerative burner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010004969A1 (en) 2008-07-07 2010-01-14 スチールプランテック株式会社 Radiant tube burner device and heat storing element unit capable of being mounted to radiant tube burner
JP5119331B2 (en) * 2008-07-07 2013-01-16 スチールプランテック株式会社 Radiant tube burner device and heat storage unit attachable to radiant tube burner
EP2299175A4 (en) * 2008-07-07 2015-03-11 Jp Steel Plantech Co Radiant tube burner device and heat storing element unit capable of being mounted to radiant tube burner
KR20180038453A (en) 2015-08-13 2018-04-16 쥬가이로 고교 가부시키가이샤 Annunciator of maintenance time of regenerator of regenerative burner

Also Published As

Publication number Publication date
JP2766451B2 (en) 1998-06-18

Similar Documents

Publication Publication Date Title
EP0628769B1 (en) Heater including a plurality of heat accumulation type burner units and operation method thereof
WO1996009496A1 (en) Radiant tube burner and method of operating radiant tube burners
WO2003031873A1 (en) Ash melting type u-firing combustion boiler and method of operating the boiler
CA1307733C (en) Regenerative burner system
JP3052755B2 (en) Ignition method of regenerative burner
JPH07103435A (en) Combustion method for regenerative randiant tube burner
CN2890657Y (en) Heat storage type pulse burning nozzle
JP3823403B2 (en) Radiant tube burner system and operation method thereof
JP3289437B2 (en) Combustion method of heating furnace using regenerative burner
JP2766452B2 (en) Combustion method of regenerative burner
JP2796027B2 (en) Operating method of continuous heating furnace having regenerative burner
JP3952529B2 (en) Double cylinder type indirect heating furnace and operation method thereof
JPH0350413A (en) Control device for combustion apparatus
JP3332306B2 (en) Radiant tube heating device
JP3286901B2 (en) Combustion control method for regenerative burner furnace
JP3491443B2 (en) Pilot burner ignition method for non-oxidizing heating device
KR100368830B1 (en) Oxygen supply method for regenerative burner and device
JP2840534B2 (en) Thermal storage radiant tube burner
JP2579474B2 (en) Fire extinguishing method for burner for coal-water slurry
JP3429375B2 (en) Thermal storage type alternating combustion device
CN1242200C (en) Gas remote ignition method and apparatus
JPH03140705A (en) Catalytic combustion device
JP2005213586A (en) Method for controlling afterburn in direct-flame anti-oxidation heater, and apparatus therefor
JP3726526B2 (en) Heating method with regenerative combustion burner
JPH1061941A (en) Device and method for alternate combustion control of heat storage type burner

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term