JPH063402B2 - In-furnace visualization method - Google Patents
In-furnace visualization methodInfo
- Publication number
- JPH063402B2 JPH063402B2 JP8953686A JP8953686A JPH063402B2 JP H063402 B2 JPH063402 B2 JP H063402B2 JP 8953686 A JP8953686 A JP 8953686A JP 8953686 A JP8953686 A JP 8953686A JP H063402 B2 JPH063402 B2 JP H063402B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- light
- camera
- visualization method
- flame
- 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 - Lifetime
Links
Landscapes
- Radiation Pyrometers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は，回収ボイラ，石炭焚きボイラ，重油焚きボ
イラなどの燃焼反応中の炉内を可視化する方法に関する
ものである。Description: TECHNICAL FIELD The present invention relates to a method for visualizing the inside of a combustion reactor such as a recovery boiler, a coal-fired boiler, a heavy oil-fired boiler, and the like.
燃焼反応中の炉内の状況，たとえば，回収ボイラのチャ
ーベッド（廃液固形堆積物），灰，塵芥などの有無を知
ることは，炉の効率的運転，制御にとって重要なことで
ある。It is important for efficient operation and control of the furnace to know the conditions inside the furnace during the combustion reaction, such as the presence or absence of char bed (waste liquid solid deposits), ash, and dust in the recovery boiler.
このような炉内の堆積物の有無を検知する方法として，
従来テレビジョンカメラモニタ等で炉内を映し出す方法
が取られている。As a method to detect the presence of such deposits in the furnace,
Conventionally, a method of displaying the inside of a furnace by a television camera monitor or the like has been adopted.
また，輻射温度計を利用する方法も提供されている。A method using a radiation thermometer is also provided.
炉内をテレビカメラ，あるいは，スチルカメラなどで単
に撮影する方法では，炉内の燃焼に伴う火災（輝炎）に
より炉内の堆積物などが隠れてしまい，観察窓の近くの
状態しか観察できなかった。With the method of simply photographing the inside of the furnace with a TV camera or a still camera, the fire (luminous flame) associated with the combustion inside the furnace hides the deposits inside the furnace, and only the condition near the observation window can be observed. There wasn't.
また，輻射温度計を用いる方法でも，特にチャーベット
レベルが低い場合など，ベッドからの輻射熱より火炎の
熱の方が強く，ベッドの形状を観察することが難しかっ
た。Even with the method using a radiation thermometer, the heat of the flame is stronger than the heat of radiation from the bed, especially when the charbet level is low, making it difficult to observe the shape of the bed.
このように，炉内の状況は，火炎自身が発する強い光に
より観察することが困難であった。Thus, it was difficult to observe the inside of the furnace due to the strong light emitted by the flame itself.
そこで，米国特許第4,539,588号公報に記載されている
ような方法も提供されている。Therefore, a method as described in US Pat. No. 4,539,588 is also provided.
この方法は，炉内に浮遊する微粒子（フライアッシユ・
未燃燃料粒子など）による光の散乱（遮蔽効果）あるい
は生成ガスによる光の吸収の影響を少なくするために，
炉内から次に示すような帯域を持つ光学フィルタを通し
て赤外線領域の光を テレビカメラで取り出し，モニタに表示して可視化する
ものである。This method uses fine particles (fly assembly,
In order to reduce the influence of light scattering (shielding effect) by unburned fuel particles, etc. or light absorption by generated gas,
Light in the infrared region is taken out from the furnace through an optical filter having the band shown below with a TV camera and displayed on a monitor for visualization.
1.57μｍないし1.73μｍ 2.23μｍないし2.43μｍ 3.25μｍないし4.05μｍ 4.80μｍないし5.30μｍ 6.90μｍないし7.20μｍ 7.60μｍないし7.80μｍ 7.90μｍないし13.90μｍ この帯域は，炉内ガスの赤外線吸収，および，放射によ
る影響を極力小さくするために，その影響の最も大きい
CO2およびH2Ｏの吸収帯を避けるためのものである。1.57μm to 1.73μm 2.23μm to 2.43μm 3.25μm to 4.05μm 4.80μm to 5.30μm 6.90μm to 7.20μm 7.60μm to 7.80μm 7.90μm to 13.90μm This band is due to infrared absorption and radiation of gas in the furnace The greatest impact in order to minimize the impact
This is to avoid absorption bands of CO 2 and H 2 O.
上記からまでの帯域は，波長域が2.2μｍ以上であ
るため，特殊なテレビカメラを使用する必要があり，装
置全体の価格も高くなり，また，その応答性も悪くな
る。Since the wavelength range from the above to 2.2 μm or more, it is necessary to use a special TV camera, the cost of the entire apparatus becomes high, and its responsiveness becomes poor.
そこで，比較的に低価格で，可視域のテレビカメラと応
答性あまり変わらない赤外ビジコンを備えたテレビカメ
ラを使おうとすると，この赤外ビジコンの感度域が0.8
μｍないし2.2μｍではあることを考えると，使用可能
な光学フィルタはのものに限定されてしまう。Therefore, if you try to use a TV camera that has a relatively low price and an infrared vidicon whose response is not so different from that of a visible TV, the sensitivity range of this infrared vidicon is 0.8
Considering that the thickness is μm to 2.2 μm, usable optical filters are limited to those.
この1.57μｍないし1.73μｍの帯域は赤外のなかでは短
波長側に位置するため，散乱が『ミー散乱理論』に示さ
れるように波長の２乗に逆比例することを考えれば，炉
内微粒子による散乱の影響を避けるためには不十分なも
のとならざるを得ない。Since this 1.57 μm to 1.73 μm band is located on the short wavelength side in the infrared, considering that the scattering is inversely proportional to the square of the wavelength as shown in “Mie scattering theory” It is inadequate to avoid the influence of scattering due to.
従って，炉内の燃焼条件によっては，微粒子が多くなる
時には，火炎を透かした形で可視化される像が非常に身
にくくなることもあった。Therefore, depending on the combustion conditions in the furnace, when the amount of fine particles increased, the image visualized through the flame could be very difficult to see.
この発明では，燃焼反応中の炉内を可視化するのに際し
て，炉内から波長域2.05μｍないし2.20μｍの光を取り
出して可視化するようにした。In the present invention, when visualizing the inside of the furnace during the combustion reaction, the light in the wavelength range of 2.05 μm to 2.20 μm is extracted from the inside of the furnace for visualization.
本発明で取り出す光の帯域は，2.05μｍないし2.20μｍ
であり，従来より用いられていた1.57μｍないし1.73μ
ｍの帯域より，３０％程度長波長側に位置する。また，
炉内微粒子による散乱強度は，波長の２乗に逆比例する
ことは先に述べた。従って，本発明で採用する2.05μｍ
ないし2.20μｍの光は，1.57μｍないし1.73μｍの光よ
り，６０％程度炉内微粒子の散乱を受け難いことにな
る。つまり，この2.05μｍないし2.20μｍの光は，炉内
の火炎や燃焼排ガス中を透過する能力が，1.57μｍない
し1.73μｍの光より６０％高いことを意味する。The band of light extracted by the present invention is 2.05 μm to 2.20 μm
Which is 1.57 μm to 1.73 μ which has been used conventionally.
It is located on the long wavelength side by about 30% from the band of m. Also,
As mentioned above, the scattering intensity by the particles in the furnace is inversely proportional to the square of the wavelength. Therefore, 2.05 μm used in the present invention
That is, the light of 2 to 2.20 μm is less likely to be scattered about 60% of the particles in the furnace than the light of 1.57 to 1.73 μm. In other words, the light of 2.05 μm to 2.20 μm has a capacity of 60% higher than that of light of 1.57 μm to 1.73 μm to penetrate the flame and the combustion exhaust gas in the furnace.
一方，2.05μｍないし2.20μｍの光は，炭酸ガスにより
吸収され易く，実験によれば炭酸ガスの ガス温度 ２０℃ ガス濃度 １００％ ガス圧力 １atm で，光炉長さ ２００mm の場合，約５％が吸収されることが判った。On the other hand, light of 2.05 μm to 2.20 μm is easily absorbed by carbon dioxide gas. According to the experiment, when the temperature of carbon dioxide gas is 20 ° C., the gas concentration is 100%, the gas pressure is 1 atm, and the light furnace length is 200 mm, about 5% is about 5%. It turned out to be absorbed.
実際の炉内の条件，たとえば，当社の回収ボイラの運転
条件である炭酸ガスの ガス温度 平均 1000℃ ガス濃度 約 １２％ ガス圧力 １atm で，光炉長さ ８ ｍ の場合に換算すると，約１０％が吸収されることにな
る。このことは，炭酸ガスに殆ど吸収されない1.57μｍ
ないし1.73μｍの光に比べ，１０％程度透過能力が落ち
ることになる。When the actual furnace conditions, for example, the operating temperature of our recovery boiler, is a carbon dioxide gas temperature of 1000 ° C, an average gas concentration of approximately 12%, a gas pressure of 1 atm, and a light furnace length of 8 m, approximately 10 % Will be absorbed. This is 1.57 μm, which is hardly absorbed by carbon dioxide.
In comparison with light having a wavelength of 1.73 μm, the transmission ability is reduced by about 10%.
しかし，両者のメリット・デメリットを総合した時に
は，約５０％の透過能力の向上を得られることになる。However, when the merits and demerits of both are combined, an improvement of about 50% in transmission capacity can be obtained.
以下，本発明を図面に示す一実施例について説明する。 An embodiment of the present invention shown in the drawings will be described below.
10は赤外ビジコンを備えたテレビカメラで，2.05μｍな
いし2.20μｍの光を選択的に透過させる光学フィルタ11
と光学形12が取りつけてあり，回収ボイラの炉壁17に設
けた覗窓１８を介して炉内15を撮影するものである。Reference numeral 10 is a television camera equipped with an infrared vidicon, which is an optical filter for selectively transmitting light of 2.05 μm to 2.20 μm 11
The optical type 12 is attached, and the inside of the furnace 15 is photographed through the viewing window 18 provided on the furnace wall 17 of the recovery boiler.
なお，13はテレビカメラ10の三脚，14はテレビモニタ，
16は炉内15に堆積したチャーベッドである。In addition, 13 is a tripod of the TV camera 10, 14 is a TV monitor,
16 is a char bed deposited in the furnace 15.
炉内15の覗窓18を介してテレビカメラ10の光学系12に
は，チャーベッド16から出た光，あるいは，その火炎か
ら出た光の，炉内のガスや微粒子で散乱や吸収を受けた
ものなどが入力される。The optical system 12 of the TV camera 10 receives the light emitted from the char bed 16 or the light emitted from the flame thereof through the view window 18 of the furnace 15 by being scattered or absorbed by the gas or fine particles in the furnace. Items that are input are input.
光学フィルタ11は，入力された光の内，2.05μｍないし
2.20μｍものだけを透過し，テレビカメラ10に結像させ
る。テレビモニタ14は，その像を表示する。The optical filter 11 uses 2.05 μm or more of the input light.
Only the 2.20 μm wavelength is transmitted and an image is formed on the TV camera 10. The TV monitor 14 displays the image.
先に述べたように，光学フィルタを透過する2.05μｍな
いし2.20μｍの光は，炉内15の微粒子による散乱の影響
を比較的受けにくいものであるので，炉内15の像は明瞭
になる。As described above, the light of 2.05 μm to 2.20 μm transmitted through the optical filter is relatively unaffected by the scattering by the fine particles in the furnace 15, so that the image in the furnace 15 becomes clear.
本発明によれば，炉内の状況，例てば，回収ボイラ内に
おけるチャーベッド形状や，流動床ボイラの流動床レベ
ルが，炉内の火炎や微粒子の影響を受けず，それらを透
過した形で観察できるので，ボイラの効率の良い運転
や，安全な運転を行うことができる。According to the present invention, the condition inside the furnace, for example, the shape of the char bed in the recovery boiler and the fluidized bed level of the fluidized bed boiler are not affected by the flame and particles in the furnace, and penetrate through them. Since it can be observed at, the boiler can be operated efficiently and safely.
また，炉内にある熱交換用のチューブの表面なども観察
できるようになるので，チューブ表面への灰分の付着状
況も観察でき，スーツブローを効率よく行うことも可能
になる。Also, since the surface of the tube for heat exchange in the furnace can be observed, it is possible to observe the adhesion state of ash on the tube surface, and it is possible to carry out the suit blow efficiently.
図面は本発明の一実施例を示す図である。 10・・テレビカメラ，11・・光学フィルタ 12・・光学系，14・・テレビモニタ， 15・・炉内，16・・チヤーベッド The drawings are views showing an embodiment of the present invention. 10 ・ ・ TV camera, 11 ・ ・ Optical filter 12 ・ ・ Optical system, 14 ・ ・ TV monitor, 15 ・ ・ In furnace, 16 ・ ・ Cherbed
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−29803（ＪＰ，Ａ) 特開 昭61−56925（ＪＰ，Ａ) 特開 昭62−501644（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 62-29803 (JP, A) JP 61-56925 (JP, A) JP 62-501644 (JP, A)
Claims (1)
て，炉内から波長域2.05μｍないし2.20μｍの光を取り
出して可視化することを特徴とする炉内可視化方法。1. A method for visualizing the inside of a furnace during a combustion reaction, which comprises visualizing light by extracting light in a wavelength range of 2.05 μm to 2.20 μm from the inside of the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8953686A JPH063402B2 (en) | 1986-04-18 | 1986-04-18 | In-furnace visualization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8953686A JPH063402B2 (en) | 1986-04-18 | 1986-04-18 | In-furnace visualization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62245935A JPS62245935A (en) | 1987-10-27 |
| JPH063402B2 true JPH063402B2 (en) | 1994-01-12 |
Family
ID=13973535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8953686A Expired - Lifetime JPH063402B2 (en) | 1986-04-18 | 1986-04-18 | In-furnace visualization method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063402B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013241513A (en) * | 2012-05-18 | 2013-12-05 | Teiisetto Kk | Transparent infrared light-shielding film, transparent infrared light-shielding coating material and method for producing transparent infrared light-shielding coating material |
| WO2014067577A1 (en) | 2012-10-31 | 2014-05-08 | Force Technology | Endoscope for high-temperature processes and method of monitoring a high-temperature thermal process |
-
1986
- 1986-04-18 JP JP8953686A patent/JPH063402B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62245935A (en) | 1987-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4539588A (en) | Imaging of hot infrared emitting surfaces obscured by particulate fume and hot gases | |
| US5110365A (en) | Control of furnace cleaning for reflective ash using infrared imaging | |
| EP2513618B1 (en) | Optical flame sensor | |
| EP1602918A1 (en) | Gas leakage monitoring method and its system | |
| KR840000536B1 (en) | Arc welding monitoring method | |
| US4023201A (en) | Infrared thermography for determining equipment temperatures in oil well fires | |
| RU2090814C1 (en) | Method of restoration of damaged refractory lining of furnace and device for realization of this method (versions) | |
| JPH063402B2 (en) | In-furnace visualization method | |
| US4695881A (en) | Apparatus for imaging infrared emitting surfaces | |
| USRE33857E (en) | Imaging of hot infrared emitting surfaces obscured by particulate fume and hot gases | |
| CA1319416C (en) | Imaging of hot infrared emitting surfaces obscured by particulate fume and hot gases | |
| JPH02182817A (en) | Apparatus for observing raceway part in blast furnace | |
| JPS5987422A (en) | Inner observation device | |
| JP2021039065A (en) | Temperature distribution measurement method and measuring device | |
| JP2017187265A (en) | Observation method, observation device and observation program for combustion field | |
| JP2617831B2 (en) | Blast furnace charge monitor | |
| JP7517415B2 (en) | Furnace monitoring device | |
| JPS6344153A (en) | Observation method and device for target area | |
| RU2153654C2 (en) | Stationary pyrometric transducer | |
| CN1093620C (en) | On-line detection device for combustion condition of large boiler | |
| WO2014067577A1 (en) | Endoscope for high-temperature processes and method of monitoring a high-temperature thermal process | |
| CN106885635A (en) | A kind of heatproof detection means that furnace flame temperature field is characterized based on image | |
| JP2007263829A (en) | CO gas leakage monitoring method | |
| JP2010204024A (en) | Apparatus and method for monitoring leakage of co-containing gas | |
| SU559452A1 (en) | Device for protection against thermal radiation of the optical system and the target of the transmitting tube of a television camera |