JP2003065067A - Device for monitoring deterioration of heat insulation material for duct - Google Patents
Device for monitoring deterioration of heat insulation material for ductInfo
- Publication number
- JP2003065067A JP2003065067A JP2001254675A JP2001254675A JP2003065067A JP 2003065067 A JP2003065067 A JP 2003065067A JP 2001254675 A JP2001254675 A JP 2001254675A JP 2001254675 A JP2001254675 A JP 2001254675A JP 2003065067 A JP2003065067 A JP 2003065067A
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- Japan
- Prior art keywords
- duct
- temperature
- temperature distribution
- heat insulating
- insulating material
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ガスタービンの排
気ダクト等のような高温の流体が流通するダクトにおい
て保温材の劣化を監視する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for monitoring deterioration of a heat insulating material in a duct in which a high temperature fluid flows, such as an exhaust duct of a gas turbine.
【０００２】[0002]
【従来の技術】いわゆる、タービンコンバインドプラン
トは、ガスタービンと、該ガスタービンの排ガスの熱
（５５０℃〜６５０℃程度）を利用して蒸気を発生する
排熱回収ボイラと、該蒸気によって駆動される蒸気ター
ビンとを備えている。2. Description of the Related Art A so-called turbine combined plant is driven by a gas turbine, an exhaust heat recovery boiler that generates steam by utilizing heat (about 550 ° C. to 650 ° C.) of exhaust gas of the gas turbine, and the steam. Equipped with a steam turbine.
【０００３】上記ガスタービンの排ガスは、排気ダクト
を介して排熱回収ボイラに導入されるが、その際、排気
ダクトの内周面に配設された保温材によって保温され
る。上記保温材が劣化してその保温性が低下すると、排
ガスの熱の放散量が増加してその熱エネルギーが減少す
るため、蒸気タービンの駆動効率が低下する。したがっ
て、保温材の劣化度を定量的に把握して、適当な時期に
該保温材をリフレッシュする必要がある。Exhaust gas from the gas turbine is introduced into the exhaust heat recovery boiler through the exhaust duct, and at that time, it is kept warm by the heat insulating material arranged on the inner peripheral surface of the exhaust duct. When the heat insulating material deteriorates and its heat insulating property decreases, the amount of heat dissipated in the exhaust gas increases and the thermal energy decreases, so the driving efficiency of the steam turbine decreases. Therefore, it is necessary to quantitatively grasp the degree of deterioration of the heat insulating material and refresh the heat insulating material at an appropriate time.
【０００４】一方、上記保温材が劣化あるいは飛散した
場合、排気ダクトの温度が異常上昇する。そして、この
温度上昇によって排気ダクトの熱的劣化が進行すると、
該排気ダクトが破損して排ガスが外部にリークすること
になり、その場合、プラントの運転継続に支障をきた
す。このような不都合を回避するには、排気ダクトが破
損に至る前に保温機能の不良を察知して、その補修を実
施する必要がある。そこで、従来においては、上記プラ
ントの運転を停止した後、作業員が上記排気ダクト内に
入って異常箇所の有無を点検するようにしている。On the other hand, when the heat insulating material deteriorates or scatters, the temperature of the exhaust duct rises abnormally. Then, when the thermal deterioration of the exhaust duct progresses due to this temperature rise,
The exhaust duct is damaged and the exhaust gas leaks to the outside, in which case the operation of the plant is disturbed. In order to avoid such an inconvenience, it is necessary to detect a defect in the heat retaining function before the exhaust duct is damaged and repair it. Therefore, conventionally, after stopping the operation of the plant, a worker enters the exhaust duct to inspect whether there is an abnormal portion.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記作業員に
よる点検には、以下のような問題がある。
（１） 点検のためにプラントの運転を停止する必要が
ある。
（２） 保温材は、ガス流による飛散を防止するため
に、その内表面が耐熱鋼板からなる押え板によって覆れ
ているので、該保温材の劣化や飛散を直接視認するため
には、この押え板を除去する必要がある。しかし、上記
押え板は、多数のピン部材で支持されていることから、
その脱着に多大の手間を要する。このため、上記押え板
を取り外さない状態で該押え板の表面の変化（破損、色
調変化等）に基づいて保温材の劣化や飛散を推定してい
るが、このような点検手法では、信頼性の高い点検結果
が得られない。
（３） 排気ダクトの形状が大きいので、その全域を点
検するには、多大の時間を要する。However, the inspection by the worker has the following problems. (1) It is necessary to stop the plant operation for inspection. (2) Since the heat insulating material has its inner surface covered with a holding plate made of a heat-resistant steel plate in order to prevent the heat insulating material from scattering, in order to directly visually check the deterioration and the scattering of the heat insulating material, The holding plate needs to be removed. However, since the pressing plate is supported by many pin members,
It takes a lot of trouble to attach and detach it. For this reason, deterioration or scattering of the heat insulating material is estimated based on the change (damage, color tone change, etc.) of the surface of the pressing plate without removing the pressing plate. High inspection results cannot be obtained. (3) Since the shape of the exhaust duct is large, it takes a lot of time to inspect the entire area.
【０００６】本発明の課題は、上記従来の問題点に鑑
み、ダクトに接続される周辺機器の運転を停止すること
なく、該ダクトの保温材の劣化を監視することができる
タービン排気ダクトの保温材劣化監視装置を提供するこ
とにある。In view of the above-mentioned conventional problems, an object of the present invention is to keep a turbine exhaust duct warm by monitoring deterioration of a heat insulator of the duct without stopping operation of peripheral equipment connected to the duct. It is to provide a material deterioration monitoring device.
【０００７】[0007]
【課題を解決するための手段】本発明に係る保温材劣化
監視装置は、高温流体が流れるダクトの外表面から放射
される赤外線を感知する赤外線カメラと、前記外表面の
代表点の温度を測定する温度センサと、前記赤外線カメ
ラおよび温度センサの出力に基づいて前記外表面の温度
分布を算出する処理部と、予め設定されている前記外表
面の基準温度分布と前記算出された温度分布とを比較し
て、前記ダクトの内周面に配設されている保温材の劣化
度を評価する評価部と、前記評価部の評価結果を表示す
る表示部と、を備えた構成を有する。また、本発明に係
る保温材劣化監視装置は、高温流体が流れるダクトの外
表面から放射される赤外線を感知する赤外線カメラと、
前記外表面の代表点の温度を測定する温度センサと、前
記外表面近傍の風速および／または気温を計測する環境
センサと、前記赤外線カメラ、温度センサおよび環境セ
ンサの各出力に基づいて、前記風速および／または気温
の影響を除去した前記外表面の温度分布を算出する処理
部と、予め設定されている前記外表面の基準温度分布と
前記算出された温度分布とを比較して、前記ダクトの内
周面に配設されている保温材の劣化度を評価する評価部
と、前記評価部の評価結果を表示する表示部と、を備え
た構成を有する。上記各発明において、前記外表面を撮
影する可視カメラを付加し、前記表示部において、前記
可視カメラの画像データと前記処理部で算出された温度
分布とを重ね合わせて表示することも可能である。本発
明は、特にガスタービンの排気ダクトにおける保温材の
劣化の監視に適用して有効である。A heat insulating material deterioration monitoring apparatus according to the present invention measures an infrared camera for detecting infrared rays emitted from an outer surface of a duct through which a high temperature fluid flows, and a temperature at a representative point of the outer surface. A temperature sensor, a processing unit that calculates the temperature distribution of the outer surface based on the outputs of the infrared camera and the temperature sensor, a preset reference temperature distribution of the outer surface, and the calculated temperature distribution. In comparison, it has a configuration including an evaluation unit that evaluates the degree of deterioration of the heat insulating material disposed on the inner peripheral surface of the duct, and a display unit that displays the evaluation result of the evaluation unit. Further, the heat insulating material deterioration monitoring apparatus according to the present invention, an infrared camera for detecting infrared rays emitted from the outer surface of the duct through which the high temperature fluid flows,
A temperature sensor that measures a temperature at a representative point of the outer surface, an environment sensor that measures a wind speed and / or an air temperature near the outer surface, and the wind speed based on each output of the infrared camera, the temperature sensor, and the environment sensor. And / or a processing unit that calculates the temperature distribution of the outer surface from which the influence of the air temperature is removed, and a preset reference temperature distribution of the outer surface and the calculated temperature distribution are compared, and It has the composition provided with the evaluation part which evaluates the deterioration degree of the heat insulating material arranged on the inner skin, and the display part which displays the evaluation result of the above-mentioned evaluation part. In each of the above inventions, it is also possible to add a visible camera for photographing the outer surface, and display the image data of the visible camera and the temperature distribution calculated by the processing unit in the display unit in an overlapping manner. . The present invention is particularly effective when applied to monitoring deterioration of the heat insulating material in the exhaust duct of the gas turbine.
【０００８】[0008]
【発明の実施の形態】図４は、複合サイクル発電プラン
トの構成の一例を概念的に示している。この発電プラン
トにおいて、ガスタービン１は、空気圧縮機２と、この
空気圧縮機２で圧縮された空気を用いて燃料を燃焼させ
る燃焼器３と、この燃焼器３に生じた高温高圧の燃焼ガ
スの膨張作用によって回転駆動されるタービン４とを備
え、このタービン４の回転動力を発電機５に伝達する。BEST MODE FOR CARRYING OUT THE INVENTION FIG. 4 conceptually shows an example of the configuration of a combined cycle power plant. In this power generation plant, a gas turbine 1 includes an air compressor 2, a combustor 3 that burns fuel using air compressed by the air compressor 2, and a high-temperature high-pressure combustion gas generated in the combustor 3. The turbine 4 is driven to rotate by the expansion action of the turbine 4, and the rotational power of the turbine 4 is transmitted to the generator 5.
【０００９】タービン４から排出される高温（５５０℃
〜６５０℃程度）の排ガスは、排気ダクト６を介して排
熱回収ボイラ７に導入される。排熱回収ボイラ７は、上
記排ガスの熱エネルギーによって水蒸気を発生し、その
水蒸気で蒸気タービン８を回転駆動する。なお、蒸気タ
ービン８で発生した回転動力は、発電機９に伝達され
る。また、蒸気タービン８から排出される蒸気は、復水
器１０の熱交器で冷却凝縮され、復水として上記ボイラ
７の給水系に流入する。The high temperature (550 ° C.) discharged from the turbine 4
Exhaust gas of about ˜650 ° C.) is introduced into the exhaust heat recovery boiler 7 via the exhaust duct 6. The exhaust heat recovery boiler 7 generates steam by the heat energy of the exhaust gas, and the steam drives the steam turbine 8 to rotate. The rotary power generated in the steam turbine 8 is transmitted to the generator 9. The steam discharged from the steam turbine 8 is cooled and condensed in the heat exchanger of the condenser 10 and flows into the water supply system of the boiler 7 as condensed water.
【００１０】図２は、上記タービン４の排ガスを流通さ
せる排気ダクト６の外観を、また、図３は、この排気ダ
クト６の部分拡大断面を示している。排気ダクト６は、
厚さ６〜９ｍｍ程度の炭素鋼板で形成されており、図３
に示すように、その内周面に保温材１１が配設されてい
る。保温材１１は、ガス流による飛散を防止するため、
押え板１２によってその内表面が覆れている。なお、押
え板１２は、厚さ２ないし３ｍｍ程度の耐熱鋼板で形成
されている。また、この押え板１２は、排気ダクト６の
内周面に突設した多数のピン１３によって該排気ダクト
６に着脱自在に支持されている。FIG. 2 shows the appearance of the exhaust duct 6 for circulating the exhaust gas of the turbine 4, and FIG. 3 shows a partially enlarged cross section of the exhaust duct 6. The exhaust duct 6 is
It is formed of a carbon steel plate having a thickness of about 6 to 9 mm.
As shown in, the heat insulating material 11 is arranged on the inner peripheral surface thereof. The heat insulating material 11 prevents scattering due to the gas flow,
The inner surface of the holding plate 12 is covered. The pressing plate 12 is made of a heat-resistant steel plate having a thickness of about 2 to 3 mm. The pressing plate 12 is detachably supported on the exhaust duct 6 by a large number of pins 13 protruding from the inner peripheral surface of the exhaust duct 6.
【００１１】上記保温材１１は、ガス流を排気ダクト６
の壁面から熱的に絶縁する役目をなすものであるから、
この保温材１１の保温性能が低下した場合、あるいは、
上記押え板１２の合わせ目や脱落箇所から保温材１１が
飛散した場合、ガス流の熱放散のために排気ダクト６の
該当箇所の温度が上昇することになる。したがって、排
気ダクト６の外表面の温度分布を計測し、この温度分布
と保温材１１の劣化がないときにおける基準温度分布と
を比較することによって、保温材１１の劣化を知ること
ができる。The heat insulating material 11 allows the gas flow to flow through the exhaust duct 6
Since it serves to thermally insulate from the wall surface of
When the heat insulating performance of the heat insulating material 11 deteriorates, or
If the heat insulating material 11 scatters from the joints or the dropout points of the holding plate 12, the temperature of the corresponding point of the exhaust duct 6 rises due to the heat dissipation of the gas flow. Therefore, it is possible to know the deterioration of the heat insulating material 11 by measuring the temperature distribution on the outer surface of the exhaust duct 6 and comparing the temperature distribution with the reference temperature distribution when the heat insulating material 11 is not deteriorated.
【００１２】図１は、上記のような原理に従って保温材
の劣化を監視する本発明に係るガスタービン排気ダクト
の保温材劣化監視装置の実施形態を示している。この監
視装置において、赤外線カメラ２０は、排気ダクト６の
外表面から放射される赤外線を感知し、また、可視カメ
ラ（例えばデジタルカメラ）２１は、赤外線カメラ２０
の赤外線感知エリアを撮像する。FIG. 1 shows an embodiment of a heat insulating material deterioration monitoring device for a gas turbine exhaust duct according to the present invention, which monitors deterioration of the heat insulating material according to the above-described principle. In this monitoring device, the infrared camera 20 senses infrared rays emitted from the outer surface of the exhaust duct 6, and the visible camera (for example, a digital camera) 21 is an infrared camera 20.
Image the infrared sensing area of.
【００１３】温度センサ２２は、排気ダクト６の外表面
における上記赤外線感知エリアの代表点の温度を検出す
る。なお、この温度センサ２２の出力は、赤外線カメラ
２０および可視カメラの出力と共に処理部２５にそれぞ
れ加えられる。The temperature sensor 22 detects the temperature of the representative point of the infrared sensing area on the outer surface of the exhaust duct 6. The output of the temperature sensor 22 is added to the processing unit 25 together with the outputs of the infrared camera 20 and the visible camera.
【００１４】図２に示したガスタービン用排気ダクト６
は形状が大きいので、監視すべきエリアが広い。そこ
で、この実施形態では、上記監視エリアを複数個に分割
し、その分割されたエリアＡ１，Ａ２，・・・を上記赤
外線センサ２０の単位感知エリアとして設定している。
なお、上記赤外線カメラ２０および可視カメラ２１は、
一体化されている。Exhaust duct 6 for gas turbine shown in FIG.
Because of its large shape, the area to be monitored is large. Therefore, in this embodiment, the monitoring area is divided into a plurality of areas, and the divided areas A1, A2, ... Are set as the unit sensing areas of the infrared sensor 20.
The infrared camera 20 and the visible camera 21 are
It is integrated.
【００１５】以下、この保温材劣化監視装置の作用につ
いて説明する。いま、図２に示した感知エリアＡ１に赤
外線カメラ２０および可視カメラ２１が向けられている
とすると、赤外線カメラ２０から感知エリアＡ１の放熱
分布を示す熱画像信号が処理部２５に出力され、また、
可視カメラ２１から感知エリアＡ１の可視画像を示す信
号が処理部２５に出力される。さらに、温度センサ２２
から感知エリアＡ１のダクト６外表面の代表点における
温度が処理部２５に出力される。The operation of the heat insulating material deterioration monitoring device will be described below. Now, assuming that the infrared camera 20 and the visible camera 21 are directed to the sensing area A1 shown in FIG. 2, the infrared camera 20 outputs a thermal image signal indicating the heat radiation distribution of the sensing area A1 to the processing unit 25, and ,
A signal indicating a visible image of the sensing area A1 is output from the visible camera 21 to the processing unit 25. Furthermore, the temperature sensor 22
Outputs the temperature at the representative point on the outer surface of the duct 6 in the sensing area A1 to the processing unit 25.
【００１６】処理部２５は、赤外線カメラ２０から出力
される熱画像信号を処理して感知エリアＡ１の放熱分布
を得るとともに、この放熱分布と温度センサ２２から出
力される上記代表点の温度とに基づいて、感知エリアＡ
１の温度分布を得る。すなわち、処理部２５は、上記代
表点における温度と放熱量の対応関係から代表点の温度
に対応する放熱量を認識し、この放熱量に基づいて上記
放熱分布を温度分布に置き換える演算を実行する。The processing unit 25 processes the thermal image signal output from the infrared camera 20 to obtain the heat radiation distribution of the sensing area A1, and determines the heat radiation distribution and the temperature of the representative point output from the temperature sensor 22. Based on the sensing area A
A temperature distribution of 1 is obtained. That is, the processing unit 25 recognizes the heat radiation amount corresponding to the temperature of the representative point from the correspondence relationship between the temperature at the representative point and the heat radiation amount, and executes the calculation for replacing the heat radiation distribution with the temperature distribution based on the heat radiation amount. .
【００１７】上記演算によって得られた感知エリアＡ１
の温度分布を示すデータは、前記カメラ２１によって選
られる該感知エリアＡ１の可視画像データと共に記憶部
２６に記憶される。一方、表示部２７は、上記温度分布
データと可視画像データとを重ね合わせて表示する。こ
れにより、エリアＡ１におけるダクト外表面の温度分布
を確認することができる。Sensing area A1 obtained by the above calculation
The data indicating the temperature distribution is stored in the storage unit 26 together with the visible image data of the sensing area A1 selected by the camera 21. On the other hand, the display unit 27 superimposes and displays the temperature distribution data and the visible image data. Thereby, the temperature distribution on the outer surface of the duct in the area A1 can be confirmed.
【００１８】評価部２９は、記憶部２８に予め格納して
ある複数の単位感知エリアＡ１，Ａ２，・・・ごとの基
準温度分布（保温材１１が健全な状態のときの温度分
布）のうちのエリアＡ１の基準温度分布と、上記処理部
２５で算出された温度分布とを比較し、温度上昇値が所
定の大きさ（例えば、８０℃）以上の場合に、保温材１
１が劣化（保温機能低下、押え板１２の合わせ目や脱落
箇所からの保温材の飛散等）していると評価し、その結
果を表示部２７に表示させる。以後、残りの感知エリア
Ａ２，・・・についても同様の温度分布を算出し、その
温度分布と基準温度分布とを比較して保温材１１の劣化
について評価する。Of the reference temperature distributions (temperature distributions when the heat insulating material 11 is in a healthy state) among the plurality of unit sensing areas A1, A2, ... The reference temperature distribution of the area A1 is compared with the temperature distribution calculated by the processing unit 25, and when the temperature rise value is equal to or larger than a predetermined value (for example, 80 ° C.), the heat insulating material 1
No. 1 is deteriorated (the heat insulating function is deteriorated, the heat insulating material is scattered from the joints of the pressing plate 12 and the falling portion), and the result is displayed on the display unit 27. Thereafter, similar temperature distributions are calculated for the remaining sensing areas A2, ... And the temperature distribution is compared with the reference temperature distribution to evaluate the deterioration of the heat insulating material 11.
【００１９】ところで、図１に示すように、この実施形
態では、ダクト外表面近傍の風速および気温を検出する
風速センサ２３および温度センサ２４を設置するととも
に、記憶部２８にダクト６の外表面温度に対する外表面
近傍の風速および気温の影響度を示すデータを予め格納
してある。したがって、上記風速センサ２３で検出され
る風速の温度分布への影響度および上記温度センサ２４
で検出される気温の温度分布への影響度を上記記憶部の
記憶内容から知ることが可能である。そして、この影響
度が知られれば、風速および気温の影響を除去した温度
分布を算出して、保温材１１の劣化をより精度良く評価
することができる。すなわち、ダクト６の外表面近傍の
風速および気温が異なると、それだけダクト６の外表面
温度が変化することになるので、各感知エリアＡ１，Ａ
２，・・・における温度分布を算出する際に、風速セン
サ２３で測定された風速と基準風速（基準温度分布時に
おける風速）との差異および温度センサ２４で測定され
た気温と基準温度（基準温度分布時における気温）との
差異を加味することにより、上記風速および気温の影響
を除去した温度分布を算出することが可能になる。By the way, as shown in FIG. 1, in this embodiment, a wind speed sensor 23 and a temperature sensor 24 for detecting the wind speed and the air temperature near the outer surface of the duct are installed, and the outer surface temperature of the duct 6 is stored in the storage unit 28. Data indicating the degree of influence of the wind speed and the temperature near the outer surface with respect to is stored in advance. Therefore, the degree of influence of the wind speed detected by the wind speed sensor 23 on the temperature distribution and the temperature sensor 24.
It is possible to know the degree of influence on the temperature distribution of the air temperature detected by the above from the stored contents of the storage unit. Then, if the degree of influence is known, the temperature distribution in which the influence of the wind speed and the temperature is removed can be calculated, and the deterioration of the heat insulating material 11 can be evaluated more accurately. That is, if the wind speed and the air temperature in the vicinity of the outer surface of the duct 6 are different, the outer surface temperature of the duct 6 is changed accordingly.
When calculating the temperature distribution in 2, ..., The difference between the wind speed measured by the wind speed sensor 23 and the reference wind speed (wind speed at the time of the reference temperature distribution), and the temperature and reference temperature (reference temperature measured by the temperature sensor 24 By taking into consideration the difference between the temperature distribution and the temperature), it is possible to calculate the temperature distribution without the influence of the wind speed and the temperature.
【００２０】そこで、処理部２５は、赤外線カメラ２０
および温度センサ２２の出力に加えて、上記風速センサ
２３および温度センサ２４の出力も入力し、風速センサ
２３の出力値が基準風速の値から所定の許容値以上異な
る場合、および温度センサ２４の出力値が基準気温の値
から所定の許容値以上異なる場合に、記憶部２８に予め
格納されている影響度データ（補正データ）の中から上
記風速センサ２３および温度センサ２４の出力値に対応
したデータをそれぞれ読出す。そして、赤外線カメラ２
０と温度センサ２２の出力に基づいて演算される前記温
度分布各データを上記読出したデータで補正する演算
（例えば、加減算）を実行して、風速および気温の影響
を除去した最終的な温度分布を得る。Therefore, the processing unit 25 uses the infrared camera 20.
In addition to the outputs of the temperature sensor 22 and the output of the wind speed sensor 23 and the temperature sensor 24, when the output value of the wind speed sensor 23 differs from the reference wind speed value by a predetermined allowable value or more, and the output of the temperature sensor 24 Data corresponding to the output values of the wind speed sensor 23 and the temperature sensor 24 from the influence degree data (correction data) stored in advance in the storage unit 28 when the value differs from the reference temperature value by a predetermined allowable value or more. Are read respectively. And infrared camera 2
0 and the temperature distribution 22 is calculated based on the output of the temperature sensor 22. The final temperature distribution is obtained by removing the influence of the wind speed and the air temperature by executing the calculation (for example, addition and subtraction) of correcting each data of the temperature distribution with the read data. To get
【００２１】なお、評価部２９は、処理部２５で算出さ
れた上記最終的な温度分布と記憶部２６に格納されてい
る前記基準温度分布とを比較して、前述したように保温
材１１の劣化を評価する。このように、風速および気温
の影響を除去した温度分布を得るようにすれば、風およ
び気温という外乱要因に左右されることなく、保温材１
１の劣化をより精度良く監視することが可能になる。な
お、本発明は、タービンの排気ダクトだけでなく、高温
流体が通過する他のプラント用ダクトに設けられた保温
材の劣化監視にも適用可能である。The evaluation unit 29 compares the final temperature distribution calculated by the processing unit 25 with the reference temperature distribution stored in the storage unit 26, and as described above, the heat insulating material 11 Evaluate deterioration. By thus obtaining the temperature distribution in which the influence of the wind speed and the air temperature is removed, the heat insulating material 1 is not affected by the disturbance factors such as the wind and the air temperature.
It becomes possible to monitor the deterioration of No. 1 with higher accuracy. The present invention can be applied not only to the exhaust duct of a turbine but also to monitoring deterioration of a heat insulating material provided in another plant duct through which a high temperature fluid passes.
【００２２】[0022]
【発明の効果】請求項１の発明によれば、ダクトに接続
される周辺機器の運転を停止することなく、該ダクトの
保温材の劣化を監視することができる。請求項２の発明
によれば、風および気温の影響を受けることなく保温材
の劣化をより精度良く監視することができる。請求項３
の発明によれば、監視エリアとそのエリアにおける温度
分布とを重ね合わせて表示することができる。According to the first aspect of the present invention, the deterioration of the heat insulating material in the duct can be monitored without stopping the operation of the peripheral equipment connected to the duct. According to the invention of claim 2, deterioration of the heat insulating material can be monitored more accurately without being affected by wind and temperature. Claim 3
According to the invention, the monitoring area and the temperature distribution in the area can be displayed in an overlapping manner.
【図１】本発明に係る排気ダクトの保温材劣化監視装置
の実施形態を示したブロック図。FIG. 1 is a block diagram showing an embodiment of a heat insulating material deterioration monitoring device for an exhaust duct according to the present invention.
【図２】排気ダクトの側面図。FIG. 2 is a side view of an exhaust duct.
【図３】排気ダクトの部分拡大断面図。FIG. 3 is a partially enlarged sectional view of an exhaust duct.
【図４】複合サイクル発電プラントの構成を例示した該
略図。FIG. 4 is a schematic diagram illustrating the configuration of a combined cycle power plant.
１ ガスタービン ６ 排気ダクト ７ 排熱回収ボイラ ８ 蒸気タービン ２０ 赤外線カメラ ２１ 可視カメラ ２２ 温度センサ ２３ 風速センサ ２４ 温度センサ ２５ 処理部 ２６，２８ 記憶部 ２７ 表示部 ２９ 評価部 1 gas turbine 6 exhaust duct 7 Exhaust heat recovery boiler 8 steam turbine 20 infrared camera 21 visible camera 22 Temperature sensor 23 Wind speed sensor 24 Temperature sensor 25 Processing Department 26, 28 storage 27 Display 29 Evaluation Department
Claims (4)
射される赤外線を感知する赤外線カメラと、 前記外表面の代表点の温度を測定する温度センサと、 前記赤外線カメラおよび温度センサの出力に基づいて前
記外表面の温度分布を算出する処理部と、 予め設定されている前記外表面の基準温度分布と前記算
出された温度分布とを比較して、前記ダクトの内周面に
配設されている保温材の劣化度を評価する評価部と、 前記評価部の評価結果を表示する表示部と、を備えてな
ることを特徴とするダクトの保温材劣化監視装置。1. An infrared camera for detecting infrared rays emitted from an outer surface of a duct through which a high-temperature fluid flows, a temperature sensor for measuring a temperature of a representative point of the outer surface, and an output of the infrared camera and the temperature sensor. And a processing unit for calculating the temperature distribution of the outer surface, comparing a preset reference temperature distribution of the outer surface with the calculated temperature distribution, and disposing the temperature distribution on the inner peripheral surface of the duct. A heat insulating material deterioration monitoring device for a duct, comprising: an evaluation unit that evaluates the degree of deterioration of the existing heat insulating material; and a display unit that displays the evaluation result of the evaluation unit.
射される赤外線を感知する赤外線カメラと、 前記外表面の代表点の温度を測定する温度センサと、 前記外表面近傍の風速および／または気温を計測する環
境センサと、 前記赤外線カメラ、温度センサおよび環境センサの各出
力に基づいて、前記風速および／または気温の影響を除
去した前記外表面の温度分布を算出する処理部と、 予め設定されている前記外表面の基準温度分布と前記算
出された温度分布とを比較して、前記ダクトの内周面に
配設されている保温材の劣化度を評価する評価部と、 前記評価部の評価結果を表示する表示部と、を備えてな
ることを特徴とするダクトの保温材劣化監視装置。2. An infrared camera for detecting infrared rays emitted from an outer surface of a duct through which a high-temperature fluid flows, a temperature sensor for measuring a temperature at a representative point of the outer surface, and a wind speed and / or an air temperature near the outer surface. And a processing unit that calculates a temperature distribution of the outer surface from which the influence of the wind speed and / or the air temperature is removed based on the outputs of the infrared camera, the temperature sensor, and the environment sensor. Comparing the reference temperature distribution of the outer surface and the calculated temperature distribution, an evaluation unit for evaluating the degree of deterioration of the heat insulating material arranged on the inner peripheral surface of the duct, and the evaluation unit A heat insulation material deterioration monitoring device for a duct, comprising: a display unit that displays an evaluation result.
し、前記表示部において、前記可視カメラの画像データ
と前記処理部で算出された温度分布とを重ね合わせて表
示するようにしたことを特徴とする請求項１または２に
記載のダクトの保温材劣化監視装置。3. A visible camera for photographing the outer surface is added, and the image data of the visible camera and the temperature distribution calculated by the processing unit are superimposed and displayed on the display unit. The heat insulation material deterioration monitoring device for a duct according to claim 1 or 2.
である請求項１〜３のいずれかに記載のダクトの保温材
劣化監視装置。4. The heat insulating material deterioration monitoring device for a duct according to claim 1, wherein the duct is an exhaust duct of a gas turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001254675A JP4727087B2 (en) | 2001-08-24 | 2001-08-24 | Duct heat insulation deterioration monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001254675A JP4727087B2 (en) | 2001-08-24 | 2001-08-24 | Duct heat insulation deterioration monitoring device |
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| Publication Number | Publication Date |
|---|---|
| JP2003065067A true JP2003065067A (en) | 2003-03-05 |
| JP4727087B2 JP4727087B2 (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001254675A Expired - Lifetime JP4727087B2 (en) | 2001-08-24 | 2001-08-24 | Duct heat insulation deterioration monitoring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008002393A (en) * | 2006-06-23 | 2008-01-10 | Toshiba Corp | Straightening grid for exhaust and exhaust duct with the straightening grid |
| JP2008532032A (en) * | 2005-02-28 | 2008-08-14 | スペルソーン ボロー カウンシル | How to assess the thermal efficiency of a building |
| JP2010007663A (en) * | 2008-06-25 | 2010-01-14 | General Electric Co <Ge> | Method, system and controller for establishing wheel space temperature alarm in turbomachine |
| JP2019184199A (en) * | 2018-04-16 | 2019-10-24 | 株式会社Ihi | Alarm system and combustor |
| JP2020048485A (en) * | 2018-09-26 | 2020-04-02 | 株式会社トプコン | Temperature measuring system and temperature measuring method |
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| US5703362A (en) * | 1996-01-02 | 1997-12-30 | General Electric Company | Method for nondestructive/noncontact detection and quantification of alpha case on a surface of a workpiece made of titanium or a titanium-based alloy |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008532032A (en) * | 2005-02-28 | 2008-08-14 | スペルソーン ボロー カウンシル | How to assess the thermal efficiency of a building |
| JP2008002393A (en) * | 2006-06-23 | 2008-01-10 | Toshiba Corp | Straightening grid for exhaust and exhaust duct with the straightening grid |
| JP4714093B2 (en) * | 2006-06-23 | 2011-06-29 | 株式会社東芝 | Exhaust rectifier grid and exhaust duct with rectifier grid |
| JP2010007663A (en) * | 2008-06-25 | 2010-01-14 | General Electric Co <Ge> | Method, system and controller for establishing wheel space temperature alarm in turbomachine |
| JP2019184199A (en) * | 2018-04-16 | 2019-10-24 | 株式会社Ihi | Alarm system and combustor |
| JP2020048485A (en) * | 2018-09-26 | 2020-04-02 | 株式会社トプコン | Temperature measuring system and temperature measuring method |
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|---|---|
| JP4727087B2 (en) | 2011-07-20 |
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