JPH0549893B2 - - Google Patents
Info
- Publication number
- JPH0549893B2 JPH0549893B2 JP59081159A JP8115984A JPH0549893B2 JP H0549893 B2 JPH0549893 B2 JP H0549893B2 JP 59081159 A JP59081159 A JP 59081159A JP 8115984 A JP8115984 A JP 8115984A JP H0549893 B2 JPH0549893 B2 JP H0549893B2
- Authority
- JP
- Japan
- Prior art keywords
- burner
- flame
- boiler
- detection signal
- combustion
- 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.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 claims description 68
- 238000002485 combustion reaction Methods 0.000 claims description 37
- 239000000446 fuel Substances 0.000 claims description 22
- 239000000567 combustion gas Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 230000007257 malfunction Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
- F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/22—Timing network
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/02—Measuring filling height in burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
- Control Of Combustion (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はボイラのバーナなどの着火、消火を確
認する燃焼安全装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a combustion safety device for checking ignition and extinguishment of a boiler burner, etc.
第１図は従来の燃焼安全装置の系統図、第２図
は第１図のフローチヤートである。
FIG. 1 is a system diagram of a conventional combustion safety device, and FIG. 2 is a flowchart of FIG. 1.
ボイラなどの燃焼装置は第１図に示す如くボイ
ラ１のウインドボツクス２内に主バーナ３、点火
バーナ４、点火トーチ５および火炎検出器６を配
置して構成されている。 A combustion device such as a boiler is constructed by arranging a main burner 3, an ignition burner 4, an ignition torch 5, and a flame detector 6 in a wind box 2 of a boiler 1, as shown in FIG.
そして、主バーナ３には主バーナ用燃料配管７
と噴霧媒体配管８が、点火バーナ４には噴霧媒体
配管８と点火バーナ用燃料配管９が接続され、更
にこの主バーナ用燃料配管７、点火バーナ用燃料
配管９および噴霧媒体配管８には主バーナ用遮断
弁１０、点火バーナ用遮断弁１１および噴霧媒体
遮断弁１２が設けられている。 The main burner 3 has a main burner fuel pipe 7.
The main burner fuel pipe 7, the main burner fuel pipe 9, and the main burner fuel pipe 8 are connected to the main burner fuel pipe 7, the main burner fuel pipe 9, and the main burner fuel pipe 9. A burner cutoff valve 10, an ignition burner cutoff valve 11, and an atomization medium cutoff valve 12 are provided.
また、これらの燃焼装置には第１図に示す如く
燃焼安全装置が設けられ、この燃焼安全装置は主
バーナ３からの主バーナ火炎１４、点火バーナ４
からの点火バーナ火炎１３を火炎検出器６の視界
１５でその有、無を検出し、この火炎検出器６か
らの検出信号１６によつて主バーナ用遮断弁１
０、点火バーナ用遮断弁１１および噴霧媒体遮断
弁１２を開、閉する制御部１７とから構成されて
いる。 Furthermore, these combustion devices are provided with a combustion safety device as shown in FIG.
The presence or absence of the ignition burner flame 13 from the ignition burner flame 13 is detected by the field of view 15 of the flame detector 6, and the main burner shutoff valve 1 is detected by the detection signal 16 from the flame detector 6.
0, and a control section 17 that opens and closes the ignition burner cutoff valve 11 and the spray medium cutoff valve 12.
一方、ボイラ１のウインドボツクス２には空気
ダクト１８が接続され、この空気ダクト１８には
ダンパ１９、通風機２０が取付けられている。 On the other hand, an air duct 18 is connected to the wind box 2 of the boiler 1, and a damper 19 and a ventilator 20 are attached to this air duct 18.
そして、この通風器２０から空気ダクト１８を
経て供給される燃焼用空気は、ウインドボツクス
２よりボイラ１内に供給され、主バーナ３、点火
バーナ４の燃焼用空気として供給される。 Combustion air supplied from the ventilator 20 through the air duct 18 is supplied into the boiler 1 from the wind box 2, and is supplied as combustion air to the main burner 3 and ignition burner 4.
また、ボイラ１で燃焼した燃料と燃焼用空気は
排ガスとなつてボイラ１から煙道２１を経て大気
へ放出される。 Further, the fuel and combustion air burned in the boiler 1 become exhaust gas and are discharged from the boiler 1 to the atmosphere through a flue 21.
以上の説明は燃焼装置、燃焼安全装置の概要を
説明したものであるが、以下、燃焼安全装置の動
作を第２図のフローチヤートに従つてその概要を
説明する。 The above explanation provides an overview of the combustion device and the combustion safety device, and below, the operation of the combustion safety device will be briefly explained according to the flowchart shown in FIG.
先ずボイラ１の起動にあたつては、ボイラ１、
煙道２１内から爆発の危険性のある可燃ガスを追
い出すために、ダンパ１９を開いて通風機２０を
運転し、通風機２０からの燃焼用空気をボイラ１
から煙道２１へ供給してボイラ１と煙道２１をパ
ージし、ボイラ１と煙道２１内から可燃性ガスを
大気に放出する。 First, when starting boiler 1, boiler 1,
In order to expel combustible gas with a danger of explosion from inside the flue 21, the damper 19 is opened and the ventilator 20 is operated, and the combustion air from the ventilator 20 is transferred to the boiler 1.
The boiler 1 and the flue 21 are purged by being supplied to the flue 21, and the flammable gas is discharged from the boiler 1 and the flue 21 to the atmosphere.
このパージ作業が完了すると、制御部１７の押
ボタンスイツチ２６の起動操作により制御信号２
２によつてインタロツク条件２７が整つていると
AND条件が整い、点火トーチ５が励磁されて動
作し、制御部１７からの制御信号２３，２４によ
つて点火バーナ用燃料配管９の点火バーナ用遮断
弁１１と噴霧媒体配管８の噴霧媒体遮断弁１２を
開く。 When this purge work is completed, the control signal 2 is activated by activation of the push button switch 26 of the control unit 17.
If interlock condition 27 is satisfied by 2.
When the AND condition is met, the ignition torch 5 is excited and operated, and the ignition burner cutoff valve 11 of the ignition burner fuel pipe 9 and the atomizing medium of the atomizing medium pipe 8 are shut off by the control signals 23 and 24 from the control unit 17. Open valve 12.
点火トーチ５の動作、点火バーナ用遮断弁１１
の開動作のAND条件、つまり点火バーナ４への
点火条件が揃うと火炎検出器６により点火バーナ
４の点火火炎１３の有、無を検出する。 Operation of ignition torch 5, shutoff valve 11 for ignition burner
When the AND conditions for the opening operation, that is, the conditions for igniting the ignition burner 4 are met, the presence or absence of the ignition flame 13 of the ignition burner 4 is detected by the flame detector 6.
火炎検出器６が点火バーナ火炎１３「無」と確
認した場合には、点火バーナ４は失火とみなし、
失火警報表示と共に点火バーナ用遮断弁１１を閉
じて前述のパージ作業から繰返して行なう。 If the flame detector 6 confirms that the ignition burner flame 13 is "absent", the ignition burner 4 is considered to have misfired,
The misfire alarm is displayed, the ignition burner shutoff valve 11 is closed, and the purging operation described above is repeated.
一方、火炎検出器６が点火バーナ火炎１３
「有」と確認した場合には、制御部１７の制御信
号２５によつて主バーナ用燃料配管７の主バーナ
遮断弁１０を開き火炎検出器６によつて主バーナ
４の主バーナ火炎１４の有、無を確認する。 On the other hand, the flame detector 6 detects the ignition burner flame 13.
If it is confirmed that the main burner flame 14 of the main burner 4 is present, the main burner cutoff valve 10 of the main burner fuel pipe 7 is opened by the control signal 25 of the control unit 17 and the main burner flame 14 of the main burner 4 is activated by the flame detector 6. Check whether it is present or not.
火炎検出器６が主バーナ火炎１４「無」と確認
した場合には、主バーナ３は失火とみなし、前述
の点火バーナ４の失火時と同様にパージ作業から
の操作を繰返して行なう。 When the flame detector 6 confirms that the main burner flame 14 is "absent", the main burner 3 is considered to have misfired, and the operations from the purge operation are repeated in the same manner as when the ignition burner 4 misfires.
火炎検出器６が主バーナ火炎１４「有」と確認
した場合には以後定常運転に入る。 When the flame detector 6 confirms that the main burner flame 14 is present, steady operation starts thereafter.
この様に従来の燃焼安全装置は、第１図に示す
如くボイラ１の主バーナ３、点火バーナ４で燃料
を燃焼させると、この燃焼の燃焼に伴つて主バー
ナ火炎１４、点火バーナ火炎１３から熱、光、イ
オンが発生することから、これらの熱、光、イオ
ンを火炎検出器６によつて検出し、火炎の有、無
を確認していた。 In this way, in the conventional combustion safety device, when fuel is combusted in the main burner 3 and ignition burner 4 of the boiler 1 as shown in FIG. Since heat, light, and ions are generated, these heat, light, and ions are detected by a flame detector 6 to confirm the presence or absence of flame.
そして燃焼装置で最も重要なものはこの火炎検
出器６であり、火炉爆発事故の原因の大部分は、
この火炎検出器６の誤検出に伴なう主バーナ３の
誤操作にあるからである。 The most important part of the combustion equipment is this flame detector 6, and most of the causes of furnace explosion accidents are
This is because the main burner 3 is erroneously operated due to the erroneous detection by the flame detector 6.
例えば火炎検出器６としては紫外線が主として
初期燃焼領域で発生することと、波長が短いため
にCO2などにさえぎられボイラ１内では遠くまで
到達しにくい性質を利用したUV式、一次燃焼域
に発生する輝度のちらつきがボイラ１内に存在す
るちらつきや火炎先端のゆらめきとは周波数が違
つていることを利用したフリツカー式、あるいは
火炎中では高温燃焼ガスがイオン状になつている
ことを利用して火炎中に直接電極を挿入してその
導電性を利用したフレームロツド式などが用いら
れている。 For example, the flame detector 6 is a UV type that takes advantage of the fact that ultraviolet rays are mainly generated in the initial combustion area and that their short wavelength makes it difficult for them to reach far inside the boiler 1 because they are blocked by CO 2 etc. The Fritzker method takes advantage of the fact that the brightness flickering that occurs has a different frequency from the flickering that exists in the boiler 1 or the flickering at the flame tip, or the Fritzker method takes advantage of the fact that high-temperature combustion gas is in an ionized state in the flame. The flame rod method, which inserts an electrode directly into the flame and utilizes its conductivity, is used.
このうち最も広く用いられているのがUV式で
あるが、ボイラ１の低負荷時には燃焼火炎がドラ
フトバランスなどによつてゆらぎ、火炎の伸縮、
片寄り、ブラツクスカート（不完全燃焼部）など
によつて、火炎検出器６の視界１５から主バーナ
火炎１４、点火バーナ火炎１３がはずれ、火炎検
出器６の感度不良を生じて誤検出したり、あるい
はこの誤検出によつて燃料遮断によるボイラをト
リツプするなどのトラブルが多発する欠点があつ
た。 The most widely used of these is the UV type, but when the load on boiler 1 is low, the combustion flame fluctuates due to draft balance, etc., and the flame expands and contracts.
The main burner flame 14 and the ignition burner flame 13 are removed from the field of view 15 of the flame detector 6 due to misalignment, black skirt (incomplete combustion part), etc., resulting in poor sensitivity of the flame detector 6 and false detection. Otherwise, this erroneous detection often causes troubles such as tripping of the boiler due to fuel cut-off.
本発明はかかる従来の欠点を解消しようとする
もので、その目的とするところは、火炎検出器に
よる誤検出、誤動作をなくし、より高精度、高信
頼性の燃焼安全装置を得ようとするものである。
The present invention attempts to eliminate such conventional drawbacks, and its purpose is to eliminate false detections and malfunctions caused by flame detectors, and to obtain a combustion safety device with higher accuracy and reliability. It is.
本発明は前述の目的を達成するために、
ボイラ内に燃料を噴射するバーナと、このバー
ナの火炎を検出する火炎検出器と、火炎検出器か
らの検出信号によつてバーナへの燃料を遮断する
遮断弁を開、閉する制御器とを備えた燃焼安全装
置において、
ボイラ負荷および燃焼ガスの状態値を検出する
検出手段と、これら検出手段からの検出信号が入
力される共に前記火炎検出器によるバーナ消火検
出時からの規定の経過時間をカウントするタイマ
を有する制御手段を設け、火炎検出器によるバー
ナ消火検出時からの規定の経過時間を越え、かつ
ボイラ負荷および燃焼ガスの状態値の変動幅が大
きい場合に前記遮断弁を閉じるように前記制御器
を構成したことを特徴とするものである。
In order to achieve the above-mentioned object, the present invention includes a burner that injects fuel into a boiler, a flame detector that detects the flame of this burner, and a detection signal from the flame detector that shuts off the fuel to the burner. A combustion safety device comprising: a controller for opening and closing a shutoff valve; and a detection means for detecting boiler load and combustion gas state values, and a flame detector to which detection signals from these detection means are input. A control means is provided that has a timer that counts a specified elapsed time from the time when the burner extinguishment is detected by the flame detector, and when the prescribed elapsed time from the time when the burner extinguishment is detected by the flame detector is exceeded, and the boiler load and combustion gas state values change. The controller is characterized in that the controller is configured to close the cutoff valve when the width is large.
以下本発明の実施例を図面を用いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第３図は本発明の実施例に係る燃焼安全装置の
系統図、第４図は第３図の燃焼遮断部分を示すフ
ローチヤート、第５図は各検出手段による検出信
号の変動幅を示した図である。 Fig. 3 is a system diagram of the combustion safety device according to the embodiment of the present invention, Fig. 4 is a flowchart showing the combustion cutoff part of Fig. 3, and Fig. 5 shows the fluctuation range of the detection signal by each detection means. It is a diagram.
第３図および第４図において、符号１から２５
は従来のものと同一のものを示す。 In Figures 3 and 4, numbers 1 to 25
indicates the same as the conventional one.
２８，２９，３０，３１は本発明になる検出手
段で、２８は例えばボイラ１の蒸気量を検出する
ボイラ負荷検出器、２９は炉内温度検出器、３０
は炉内圧力検出器、３１は排ガス中のO2、COを
検出する排ガス濃度検出器、３２，３３，３４，
３５は検出手段２８，２９，３０，３１により検
出された検出信号で、３２はボイラ負荷検出信
号、３３は炉内温度検出信号、３４は炉内圧力検
出信号、３５は排ガス濃度検出信号、３６はタイ
マ、３７，３８，３９，４０，４１は変動幅で、
３７は火炎検出器６からの検出信号１６の変動
幅、３８はボイラ負荷検出信号３２の変動幅、３
９は炉内温度検出信号３３の変動幅、４０は炉内
圧力検出信号３４の変動幅、４１は排ガス濃度検
出信号３５の変動幅である。 28, 29, 30, 31 are detection means according to the present invention, 28 is a boiler load detector for detecting the amount of steam in the boiler 1, 29 is a furnace temperature detector, 30
is a furnace pressure detector, 31 is an exhaust gas concentration detector that detects O 2 and CO in exhaust gas, 32, 33, 34,
35 is a detection signal detected by the detection means 28, 29, 30, 31, 32 is a boiler load detection signal, 33 is a furnace temperature detection signal, 34 is a furnace pressure detection signal, 35 is an exhaust gas concentration detection signal, 36 is the timer, 37, 38, 39, 40, 41 are the fluctuation ranges,
37 is a variation range of the detection signal 16 from the flame detector 6, 38 is a variation range of the boiler load detection signal 32, 3
Reference numeral 9 indicates a variation range of the furnace temperature detection signal 33, 40 indicates a variation range of the oven pressure detection signal 34, and 41 indicates a variation range of the exhaust gas concentration detection signal 35.
なお、第５図ａ〜ｅの横軸は時間を示すが、点
Ａから点Ｂ間は点火バーナ４の運転状態、点Ｂは
主バーナ３の着火時、点Ｃは主バーナ３の消火時
を示し、点Ｂから点Ｃ間が主バーナ３の運転状態
を示す。点Ｃから点Ｄ間はタイマ３６の規定時間
Δtを示す。 The horizontal axes in Fig. 5 a to e indicate time, and the period from point A to point B indicates the operating state of the ignition burner 4, point B indicates the time when the main burner 3 is ignited, and point C indicates the time when the main burner 3 is extinguished. The period from point B to point C indicates the operating state of the main burner 3. The period between point C and point D indicates the specified time Δt of the timer 36.
この様な構造において、本発明の燃焼安全装置
においては、第３図から第５図に示すように、火
炎検出器６の他に、ボイラ１にボイラ負荷検出器
２８、炉内温度検出器２９、炉内圧力検出器３０
および排ガス濃度検出器３１などの検出手段を設
け、火炎検出器６の検出信号１６の他にこれらの
検出手段２８，２９，３０，３１によつてボイラ
負荷検出信号３２、炉内温度検出信号３３、炉内
圧力検出信号３４および排ガス濃度検出信号３５
を検出して制御器１７へ入力し、これらの検出信
号３２，３３，３４，３５のタイマ３６による規
定時間（Δt）経過後の変動幅３７，３８，３９，
４０，４１、即ち、火炎の有、無、ΔL／Δt、
ΔT／Δt、ΔP／Δt、ΔO2／Δtを監視する。この
変動幅３７，３８，３９，４０，４１が大きい場
合のみ主バーナ３の燃料遮断弁１０を閉じるよう
にしたものである。 In such a structure, in the combustion safety device of the present invention, as shown in FIGS. 3 to 5, in addition to the flame detector 6, the boiler 1 is equipped with a boiler load detector 28 and a furnace temperature detector 29. , furnace pressure detector 30
Detection means such as an exhaust gas concentration detector 31 are provided, and in addition to the detection signal 16 of the flame detector 6, these detection means 28, 29, 30, and 31 output a boiler load detection signal 32 and a furnace temperature detection signal 33. , furnace pressure detection signal 34 and exhaust gas concentration detection signal 35
are detected and input to the controller 17, and the fluctuation widths 37, 38, 39,
40, 41, i.e. presence/absence of flame, ΔL/Δt,
Monitor ΔT/Δt, ΔP/Δt, ΔO 2 /Δt. The fuel cutoff valve 10 of the main burner 3 is closed only when the fluctuation widths 37, 38, 39, 40, and 41 are large.
つまり、従来の燃焼安全装置においては、火炎
検出器６からの検出信号１６が前述の外的条件に
よつて第５図の一点鎖線Ｅで示すように低下して
主バーナ３の主バーナ火炎１４が無と確認した場
合、第１図の主バーナ３の燃料遮断弁１０を閉じ
ていたが、本発明の場合には第５図の点Ｂから点
Ｃ間、つまり主バーナ３が燃焼している間に火炎
検出器６からの火炎検出信号１６が一点鎖線Ｅの
ように低下しても、他の検出信号３２，３３，３
４，３５の変動幅３８，３９，４０，４１を加味
するのである。 That is, in the conventional combustion safety device, the detection signal 16 from the flame detector 6 decreases as shown by the dashed line E in FIG. If it is confirmed that there is no combustion, the fuel cutoff valve 10 of the main burner 3 in FIG. Even if the flame detection signal 16 from the flame detector 6 decreases as shown by the dashed line E, other detection signals 32, 33, 3
This takes into consideration the fluctuation ranges 38, 39, 40, and 41 of 4 and 35.
すなわち、第５図のｂ，ｃ，ｄ，ｅでも明らか
なように、主バーナ３が燃焼している間、つまり
点Ｂから点Ｃ間では、燃焼に伴うボイラ負荷検出
信号３２、炉内温度検出信号３３、炉内圧力検出
信号３４および排ガス濃度検出信号３５はほぼ一
定で変動は少ないが、主バーナ３が消火（点Ｃ）
して規定時間（Δt）経過後（点Ｄ）には変動幅
３７，３８，３９，４０，４１が大きくなるから
である。 That is, as is clear from b, c, d, and e in FIG. 5, while the main burner 3 is burning, that is, between points B and C, the boiler load detection signal 32 and the furnace temperature accompanying combustion The detection signal 33, the furnace pressure detection signal 34, and the exhaust gas concentration detection signal 35 are almost constant with little fluctuation, but the main burner 3 is extinguished (point C)
This is because the fluctuation ranges 37, 38, 39, 40, and 41 become large after the specified time (Δt) has elapsed (point D).
つまり、第５図のａに示す様に、火炎検出器６
からの検出信号１６が仮に一点鎖線Ｅで示すよう
に低下しても、ボイラ負荷検出信号３２、炉内温
度検出信号３３、炉内圧力検出信号３４および排
ガス濃度検出信号３５はほぼ一定であるので、こ
の場合は火炎検出器６の誤検出であると判断す
る。 That is, as shown in FIG. 5a, the flame detector 6
Even if the detection signal 16 from the boiler decreases as shown by the dashed line E, the boiler load detection signal 32, furnace temperature detection signal 33, furnace pressure detection signal 34 and exhaust gas concentration detection signal 35 remain almost constant. In this case, it is determined that the flame detector 6 has detected an error.
従つて、本発明においては火炎検出器６の語検
出によつてボイラ１をトリツプする必要はなく定
常運転を継続することができる。 Therefore, in the present invention, there is no need to trip the boiler 1 upon detection by the flame detector 6, and steady operation can be continued.
一方、第５図の点Ｃから点Ｄ間のように各検出
信号１６，３２，３３，３４，３５共に規定時間
（Δt）経過後変動幅３７，３８，３９，４０，４
１の場合のように大きい場合には、主バーナ３か
らの主バーナ火炎１４が無と判断して主バーナ３
の燃料遮断弁１０を閉じてボイラ１への燃料を遮
断するのである。 On the other hand, as shown from point C to point D in FIG.
If the main burner flame 14 from the main burner 3 is large as in case 1, it is determined that there is no main burner flame 14 and the main burner 3
The fuel cutoff valve 10 is closed to cut off fuel to the boiler 1.
第４図にこれらのフローチヤートを示す如く、
主バーナ３への着火操作、つまり主バーナ３の主
バーナ用遮断弁１０が開いている時に、火炎検出
器６の火炎検出信号１６（主バーナ火炎１４の
有、無）、ボイラ負荷検出器２８のボイラ負荷検
出信号３２、炉内温度検出器２９の炉内温度検出
信号３３、炉内圧力検出器３０の炉内圧力検出信
号３４、排ガス濃度検出器３１の排ガス濃度検出
信号３５により燃焼に伴なう諸現象を監視してい
る。 As shown in the flowchart in Figure 4,
When the main burner 3 is ignited, that is, when the main burner cutoff valve 10 of the main burner 3 is open, the flame detection signal 16 of the flame detector 6 (presence or absence of the main burner flame 14), the boiler load detector 28 The boiler load detection signal 32 of the furnace, the furnace temperature detection signal 33 of the furnace temperature detector 29, the furnace pressure detection signal 34 of the furnace pressure detector 30, and the exhaust gas concentration detection signal 35 of the exhaust gas concentration detector 31 are used to detect combustion. We are monitoring various phenomena.
これは火炎検出器６の誤検出、誤動作によるボ
イラ１のトリツプを少なくする目的によるもので
あり、最終的には全ての検出信号１６，３２，３
３，３４，３５がAND条件の場合にのみ主バー
ナ３への燃料遮断弁１０を遮断するものであり、
主バーナ３が消化したことによるこれらの諸現象
の変化を検出するシステムである。 This is for the purpose of reducing tripping of the boiler 1 due to false detection or malfunction of the flame detector 6, and ultimately all detection signals 16, 32, 3
The fuel cutoff valve 10 to the main burner 3 is cut off only when 3, 34, and 35 are AND conditions,
This system detects changes in these phenomena due to the main burner 3 being extinguished.
この様に主バーナ３の燃焼に伴なう諸現象の各
検出信号１６，３２，３３，３４，３５を検出す
ることによつて、火炎検出器６の誤検出およびこ
の誤検出によるボイラ１のトリツプなどの誤動作
がなくなり、燃焼装置の安全性をより高くするこ
とができる。 In this way, by detecting the detection signals 16, 32, 33, 34, and 35 of various phenomena associated with the combustion of the main burner 3, it is possible to prevent erroneous detection of the flame detector 6 and the occurrence of boiler 1 due to this erroneous detection. Malfunctions such as trips are eliminated, and the safety of the combustion equipment can be increased.
また、検出信号３２，３３，３４，３５によつ
てボイラ１のチユーブ破損、焼損事故などの他の
事故や燃焼状態も監視できる。 Further, other accidents such as tube damage and burnout accidents of the boiler 1 and combustion conditions can also be monitored by the detection signals 32, 33, 34, and 35.
〔発明の効果〕
本発明は前述のように、ボイラ負荷および燃焼
ガスの状態値を検出する検出手段と、これら検出
手段からの検出信号が入力される共に前記火炎検
出器によるバーナ消火検出時からの規定の経過時
間をカウントするタイマを有する制御手段を設
け、火炎検出器によるバーナ消火検出時からの規
定の経過時間を越え、かつボイラ負荷および燃焼
ガスの状態値の変動幅が大きい場合に前記遮断弁
を閉じるように前記制御器を構成したことを特徴
とするものである。[Effects of the Invention] As described above, the present invention includes detection means for detecting the boiler load and combustion gas state values, and detection signals from these detection means are inputted, and the flame detector detects burner extinguishing. A control means is provided which has a timer that counts a specified elapsed time, and when the specified elapsed time from the time when the burner extinguishment is detected by the flame detector is exceeded and the fluctuation range of the boiler load and combustion gas state values is large, The present invention is characterized in that the controller is configured to close the cutoff valve.
そのため、火炎検出による誤検出、誤動作がな
くなり、しかも高精度、高信頼性の燃焼安全装置
となる。 Therefore, false detection and malfunction due to flame detection are eliminated, and the combustion safety device becomes highly accurate and reliable.
第１図および第２図は従来の燃焼安全装置を示
すもので、第１図は従来の燃焼安全装置の系統
図、第２図は第１図のフローチヤート、第３図か
ら第５図は本発明の燃焼安全装置を示すもので、
第３図は本発明の実施例に係る燃焼安全装置の系
統図、第４図は第３図の燃料遮断部分を示すフロ
ーチヤート、第５図は縦軸に各検出信号、横軸に
時間を示し、各検出信号の変動を示した特性図で
ある。
１……ボイラ、３……主バーナ、６……火炎検
出器、１０……遮断弁、１６……検出信号、１７
……制御器、２８，２９，３０，３１……検出手
段、３２，３３，３４，３５……検出信号、３６
……タイマ、３７，３８，３９，４０，４１……
変動幅。
Figures 1 and 2 show conventional combustion safety devices. Figure 1 is a system diagram of the conventional combustion safety device, Figure 2 is a flowchart of Figure 1, and Figures 3 to 5 are This shows the combustion safety device of the present invention,
Fig. 3 is a system diagram of a combustion safety device according to an embodiment of the present invention, Fig. 4 is a flowchart showing the fuel cutoff part of Fig. 3, and Fig. 5 shows each detection signal on the vertical axis and time on the horizontal axis. FIG. 4 is a characteristic diagram showing fluctuations in each detection signal. 1...Boiler, 3...Main burner, 6...Flame detector, 10...Shutoff valve, 16...Detection signal, 17
... Controller, 28, 29, 30, 31 ... Detection means, 32, 33, 34, 35 ... Detection signal, 36
...Timer, 37, 38, 39, 40, 41...
fluctuation range.
Claims (1)
ーナの火炎を検出する火炎検出器と、火炎検出器
からの検出信号によつてバーナへの燃料を遮断す
る遮断弁を開、閉する制御器とを備えた燃焼安全
装置において、 ボイラ負荷およびバーナ火炎部以外の燃焼ガス
の状態値を検出する検出手段と、これら検出手段
からの検出信号が入力される共に前記火炎検出器
によるバーナ消火検出時からの規定の経過時間を
カウントするタイマを有する制御手段を設け、火
炎検出器によるバーナ消火検出時からの規定の経
過時間を越え、かつボイラ負荷および燃焼ガスの
状態値の変動幅が大きい場合に前記遮断弁を閉じ
るように前記制御器を構成したことを特徴とする
燃焼安全装置。[Claims] 1. A burner that injects fuel into the boiler, a flame detector that detects the flame of the burner, and a cutoff valve that opens a cutoff valve that shuts off fuel to the burner based on a detection signal from the flame detector. , and a controller that closes the combustion safety device, the combustion safety device comprising: a detection means for detecting a boiler load and a state value of combustion gas other than the burner flame section; and a detection signal from these detection means is inputted, and the flame detector A control means is provided that has a timer that counts a specified elapsed time from the time when the burner extinguishment is detected by the flame detector, and when the prescribed elapsed time from the time when the burner extinguishment is detected by the flame detector is exceeded, and the boiler load and combustion gas state values change. A combustion safety device characterized in that the controller is configured to close the cutoff valve when the width is large.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59081159A JPS60226624A (en) | 1984-04-24 | 1984-04-24 | Combustion safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59081159A JPS60226624A (en) | 1984-04-24 | 1984-04-24 | Combustion safety device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60226624A JPS60226624A (en) | 1985-11-11 |
| JPH0549893B2 true JPH0549893B2 (en) | 1993-07-27 |
Family
ID=13738663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59081159A Granted JPS60226624A (en) | 1984-04-24 | 1984-04-24 | Combustion safety device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60226624A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0619230B2 (en) * | 1987-10-02 | 1994-03-16 | 野田産業株式会社 | Solid fuel boiler |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5733722A (en) * | 1980-08-09 | 1982-02-23 | Matsushita Electric Ind Co Ltd | Controlling device for gas appliance |
| JPS5945561B2 (en) * | 1976-12-20 | 1984-11-07 | 新明和工業株式会社 | Garbage treatment actuation device of garbage collection vehicle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6042271Y2 (en) * | 1980-12-23 | 1985-12-25 | 太平洋工業株式会社 | Boiler misfire indicator |
| JPS5945561U (en) * | 1982-09-17 | 1984-03-26 | 日立化成工業株式会社 | oxygen sensor |
-
1984
- 1984-04-24 JP JP59081159A patent/JPS60226624A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5945561B2 (en) * | 1976-12-20 | 1984-11-07 | 新明和工業株式会社 | Garbage treatment actuation device of garbage collection vehicle |
| JPS5733722A (en) * | 1980-08-09 | 1982-02-23 | Matsushita Electric Ind Co Ltd | Controlling device for gas appliance |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60226624A (en) | 1985-11-11 |
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