JPS636773B2 - - Google Patents
Info
- Publication number
- JPS636773B2 JPS636773B2 JP54099111A JP9911179A JPS636773B2 JP S636773 B2 JPS636773 B2 JP S636773B2 JP 54099111 A JP54099111 A JP 54099111A JP 9911179 A JP9911179 A JP 9911179A JP S636773 B2 JPS636773 B2 JP S636773B2
- Authority
- JP
- Japan
- Prior art keywords
- intensity
- frequency
- total fluctuation
- furnace
- signal
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 8
- 238000012806 monitoring device Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 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
- F23N5/16—Systems for controlling combustion using noise-sensitive detectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/04—Measuring pressure
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
Description
【発明の詳細な説明】
本発明は、ボイラ装置などの火炉内において発
生する共鳴による燃焼振動を予測するための監視
装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a monitoring device for predicting resonance-induced combustion vibrations occurring in a furnace such as a boiler system.
共鳴による燃焼振動はロケツト、ジエツトエン
ジン、ボイラ装置、工業用加熱炉などでしばしば
発生する現象で、多くの場合機器、装置の破損や
騒音を招くためその対策が要望されている。これ
らのなかでも特にボイラ装置や工業用加熱炉など
の比較的大規模な固定燃焼装置は、立地条件に合
わせて火炉形状・構造が変化すること、公害防止
のために改造が施こされていることなどから共鳴
による燃焼振動が発生し易い。この共鳴による燃
焼振動は、燃焼状態の変化により火炉内で圧力変
動が生じ、それによつて発生した圧力波の振動周
波数がその火炉固有の共鳴周波数に近づいたとき
に急に圧力波どうしが共鳴し合つて生じる振動
で、燃焼操作条件のごく一部で振動現象が発生
し、その他の条件では安定に燃焼する。従来では
この燃焼振動を予知することができず、振動によ
る各種のトラブルが生じていた。 Combustion vibration due to resonance is a phenomenon that often occurs in rockets, jet engines, boiler equipment, industrial heating furnaces, etc., and in many cases leads to damage to equipment and equipment and noise, so countermeasures are required. Among these, relatively large-scale fixed combustion equipment such as boilers and industrial heating furnaces are subject to changes in furnace shape and structure depending on location conditions, and modifications are made to prevent pollution. For this reason, combustion vibrations due to resonance are likely to occur. Combustion oscillations caused by this resonance occur when pressure fluctuations occur in the furnace due to changes in combustion conditions, and when the vibration frequency of the pressure waves generated thereby approaches the resonant frequency unique to the furnace, the pressure waves suddenly resonate with each other. Due to the vibrations that occur, vibration phenomena occur under a small number of combustion operating conditions, and combustion is stable under other conditions. Conventionally, this combustion vibration could not be predicted, and various troubles caused by the vibration occurred.
本発明の目的は、このような従来技術の欠点を
解消し、共鳴による燃焼振動の発生を予知する監
視装置を提供するにある。 SUMMARY OF THE INVENTION An object of the present invention is to eliminate such drawbacks of the prior art and to provide a monitoring device that predicts the occurrence of combustion oscillations due to resonance.
この目的を達成するため、本発明は、火炉内の
圧力変動を検出して電気信号に変換して出力する
検出手段と、該検出手段からの信号を入力して予
め設定された当該火炉個有の共鳴周波数を選出す
ることのできる共鳴周波数分析選出手段と、前記
検出手段からの信号を入力して全変動周波数強度
を測定する全変動強度測定手段と、前記共鳴周波
数分析選出手段から出力された選出共鳴周波数強
度と前記全変動強度測定手段から出力された全変
動周波数強度との割合を求めて、その値が所定値
を超えているか否かを判断する共鳴振動判断手段
とを備えたことを特徴とする。 In order to achieve this object, the present invention includes a detection means for detecting pressure fluctuations in a furnace, converting it into an electric signal, and outputting the same, and a detection means for detecting pressure fluctuations in a furnace, converting it into an electric signal, and outputting the electric signal. a resonant frequency analysis selection means capable of selecting a resonant frequency of the resonant frequency; a total fluctuation intensity measuring means for inputting the signal from the detection means to measure the total fluctuation frequency intensity; Resonant vibration determining means for determining the ratio of the selected resonant frequency intensity and the total fluctuation frequency intensity output from the total fluctuation intensity measuring means and determining whether the value exceeds a predetermined value. Features.
共鳴による燃焼振動を予測する手段として、火
炉内での圧力振動を測定する方法、発熱率の変動
を光学的に検出する方法、炉体の振動加速度を測
定する方法などが考えられ、また検出値の処理の
仕方としてアナログ処理あるいはデイジタル処理
などがある。本発明者らはこれらの方法について
諸種研究を重ねた結果、火炉内の圧力振幅を測定
する方法では、平均振幅値に占める共鳴周波数の
振幅値の割合が80％を超えると共鳴による燃焼振
動の発生率が極めて高いことを解明した。 Possible methods for predicting combustion vibrations due to resonance include measuring pressure vibrations within the furnace, optically detecting fluctuations in heat generation rate, and measuring the vibration acceleration of the furnace body. Processing methods include analog processing and digital processing. As a result of various studies conducted by the present inventors on these methods, we found that in the method of measuring the pressure amplitude in the furnace, if the ratio of the amplitude value of the resonant frequency to the average amplitude value exceeds 80%, combustion vibration due to resonance will occur. It was found that the incidence was extremely high.
図は本発明の実施例に係る監視システムの系統
図である。 The figure is a system diagram of a monitoring system according to an embodiment of the present invention.
ボイラ装置１における火炉内の圧力変動は圧力
変換器用プローブ２によつて測定され、検出値は
動歪計、歪ゲージ式圧力変換器などからなる変換
器本体３に送られる。変換器本体３からは検出値
がアナログ量として出力され、周波数分析器４と
全変動強度測定器６にそれぞれ入力される。周波
数分析器４は、入力されたアナログ信号をアナロ
グ量のままで各周波数成分に分析される。この周
波数分析器４には、各周波数出力から任意または
火炉形状によつて予め設定された共鳴周波数を選
出するための周波数選出入力装置５が設けてあ
る。従つて周波数分析器４は変換器本体３からの
出力信号を各周波数成分に分析して、特定の共鳴
周波数のものを選出することができる。前記全変
動強度測定器６は火炉内の圧力変動時における周
波数成分強度の総和値を測定するもので、変換器
本体３から入力されたアナログ信号がアナログ量
のままで処理される。このように周波数分析器４
および全変動強度測定器６での処理をアナログ処
理にすれば、処理時間が極めて短く、時差の少な
い監視ならびに制御が行なわれる。周波数分析器
４および全変動強度測定器６に周波数の設定、平
均操作が可能なようにすると望ましい。 Pressure fluctuations in the furnace of the boiler device 1 are measured by a pressure transducer probe 2, and detected values are sent to a transducer body 3 comprising a dynamic strain meter, a strain gauge type pressure transducer, or the like. The detected value is output as an analog quantity from the converter main body 3, and is inputted to the frequency analyzer 4 and the total fluctuation intensity measuring device 6, respectively. The frequency analyzer 4 analyzes the input analog signal into each frequency component while maintaining the analog quantity. This frequency analyzer 4 is provided with a frequency selection input device 5 for selecting an arbitrary resonance frequency or a preset resonance frequency according to the furnace shape from each frequency output. Therefore, the frequency analyzer 4 can analyze the output signal from the converter body 3 into each frequency component and select one having a specific resonant frequency. The total fluctuation intensity measuring device 6 measures the sum of frequency component intensities during pressure fluctuations in the furnace, and processes analog signals inputted from the converter main body 3 as analog quantities. In this way the frequency analyzer 4
If the processing in the total fluctuation intensity measuring device 6 is analog processing, the processing time is extremely short, and monitoring and control can be performed with little time difference. It is desirable that the frequency analyzer 4 and the total fluctuation intensity measuring device 6 be capable of frequency setting and averaging operations.
周波数分析器４から出力された選出共鳴周波数
強度と、全変動強度測定器６から出力された全変
動周波数強度は演算装置７に入力され、全変動周
波数強度に対する選出周波数強度の割合が求めら
れる。この演算装置７には、ボイラ装置１の規模
や型式などによつて選出周波数強度／全変動周波
数強度の比率の基準値が予め設定されて記憶され
ており、前記演算によつて求められた値がこの基
準値を超えているか否か比較判断される。例えば
基準値が80％の場合、演算値がそれより低い場合
には共鳴による燃焼振動が生じる懸念は現在のと
ころないことを意味し、演算値が基準値を超えて
いる場合には共鳴による燃焼振動が生じる懸念が
あるかあるいはすでに生じていることを示す。基
準値と演算値の比較結果は表示装置８に表示され
るとともに、演算値が基準値を超えている場合に
は表示装置８からアラーム信号などの警報が発せ
られるようになつている。また演算値が基準値を
超えている場合には警報信号がボイラ制御装置９
に入力され、制御装置９の指令によりボイラ装置
１の燃料系統操作端および（あるいは）気体系統
操作端が自動的に調整され、火炉内での共鳴によ
る燃焼振動が回避される。 The selected resonant frequency intensity outputted from the frequency analyzer 4 and the total fluctuation frequency intensity outputted from the total fluctuation intensity measuring device 6 are input to an arithmetic unit 7, and the ratio of the selected frequency intensity to the total fluctuation frequency intensity is determined. In this arithmetic device 7, a reference value for the ratio of selected frequency intensity/total fluctuating frequency intensity is preset and stored depending on the scale and model of the boiler device 1, and the value obtained by the above calculation is stored in advance. It is compared and determined whether or not exceeds this reference value. For example, if the standard value is 80%, if the calculated value is lower than that, it means that there is currently no concern that combustion oscillations due to resonance will occur, and if the calculated value exceeds the standard value, it means that combustion due to resonance will occur. Indicates that vibration is likely to occur or has already occurred. The comparison result between the reference value and the calculated value is displayed on the display device 8, and if the calculated value exceeds the reference value, the display device 8 issues a warning such as an alarm signal. Also, if the calculated value exceeds the reference value, an alarm signal is sent to the boiler control device 9.
The fuel system operating end and/or gas system operating end of the boiler device 1 are automatically adjusted according to the commands from the control device 9, thereby avoiding combustion vibration due to resonance within the furnace.
火炉内の圧力変動の検出装置として、振動加速
度計、騒音計、振動計を用いることもでき、また
光電子増倍管や紫外線、赤外線、可視光線検出用
のトランジスタ及び検知管を用いることもでき
る。さらに前記表示装置には検出周波数強度およ
び全振動周波数強度も合わせて表示することも可
能である。 As a device for detecting pressure fluctuations in the furnace, a vibration accelerometer, a sound level meter, or a vibration meter can be used, and a photomultiplier tube, a transistor for detecting ultraviolet rays, infrared rays, and visible light and a detection tube can also be used. Furthermore, the detected frequency intensity and the total vibration frequency intensity can also be displayed together on the display device.
本発明は前述のような構成になつており、共鳴
による燃焼振動の発生を予知することができ、振
動によるトラブルが解消される。 The present invention has the above-described configuration, and can predict the occurrence of combustion vibrations due to resonance, thereby eliminating troubles caused by vibrations.
図は本発明の実施例に係る燃焼振動監視システ
ムの系統図である。
１……ボイラ装置、２……圧力変換器用プロー
ブ、３……変換器本体、４……周波数分析器、５
……周波数選出入力装置、６……全変動強度測定
器、７……演算装置。
The figure is a system diagram of a combustion vibration monitoring system according to an embodiment of the present invention. 1... Boiler device, 2... Pressure transducer probe, 3... Transducer body, 4... Frequency analyzer, 5
. . . Frequency selection input device, 6 . . . Total fluctuation intensity measuring device, 7 . . . Arithmetic device.
Claims (1)
して出力する検出手段と、該検出手段からの信号
を入力して予め設定されている当該火炉個有の共
鳴周波数を選出することのできる共鳴周波数分析
選出手段と、前記検出手段からの信号を入力して
全変動周波数強度を測定する全変動強度測定手段
と、前記共鳴周波数分析選出手段から出力された
選出共鳴周波数強度と前記全変動強度測定手段か
ら出力された全変動周波数強度との割合を求め
て、その値が所定値を超えているか否かを判断す
る共鳴振動判断手段とを備えていることを特徴と
する燃焼振動監視装置。 ２ 特許請求の範囲第１項において、前記検出手
段から出力されて前記共鳴周波数分析選出手段お
よび全変動強度測定手段に入力される信号がアナ
ログ信号であることを特徴とする燃焼振動監視装
置。[Scope of Claims] 1. A detection means for detecting pressure fluctuations in the furnace, converting it into an electrical signal, and outputting it, and a resonant frequency unique to the furnace that is preset by inputting the signal from the detection means. a total fluctuation intensity measuring means that inputs the signal from the detection means to measure the total fluctuation frequency intensity; and a selected resonance frequency output from the resonance frequency analysis selection means. It is characterized by comprising a resonant vibration determining means for determining the ratio between the intensity and the total fluctuation frequency intensity outputted from the total fluctuation intensity measuring means and determining whether the value exceeds a predetermined value. Combustion vibration monitoring device. 2. The combustion vibration monitoring device according to claim 1, wherein the signal output from the detection means and input to the resonance frequency analysis selection means and the total fluctuation intensity measurement means is an analog signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9911179A JPS5623629A (en) | 1979-08-04 | 1979-08-04 | Monitoring device for combustion vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9911179A JPS5623629A (en) | 1979-08-04 | 1979-08-04 | Monitoring device for combustion vibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5623629A JPS5623629A (en) | 1981-03-06 |
| JPS636773B2 true JPS636773B2 (en) | 1988-02-12 |
Family
ID=14238702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9911179A Granted JPS5623629A (en) | 1979-08-04 | 1979-08-04 | Monitoring device for combustion vibration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5623629A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61101244U (en) * | 1984-12-06 | 1986-06-27 | ||
| JP2021105469A (en) * | 2019-12-26 | 2021-07-26 | 川崎重工業株式会社 | Boiler system comprising shock wave type soot blower and operation method therefor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126732A (en) * | 1979-03-24 | 1980-09-30 | Kobe Steel Ltd | Control method for combustion condition in combustion furnace |
-
1979
- 1979-08-04 JP JP9911179A patent/JPS5623629A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126732A (en) * | 1979-03-24 | 1980-09-30 | Kobe Steel Ltd | Control method for combustion condition in combustion furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5623629A (en) | 1981-03-06 |
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