JP7050194B1 - Boiler damage estimation system and boiler damage estimation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damage degree estimation method focusing on a behavior peculiar to a boiler at the time of an earthquake.
SOLUTION: A boiler damage degree estimation device (100) has a boiler rear wall (22) facing a cage portion (4) in a boiler (1) and a cage front facing a furnace rear wall in the cage portion. The sensor data output by detecting the relative displacement of the wall (41) is received from the cloud server (200), and the time-series change of the relative displacement of the boiler is calculated based on the sensor data. The amount of change in the shape of the rear wall of the boiler and the cage is analyzed, and the analysis result is output.
[Selection diagram] Fig. 1

Description

The present invention relates to a boiler damage degree estimation system and an apparatus, and more particularly to a technique for estimating the damage degree when a boiler having a cage portion at the rear of the furnace and the boiler is damaged by seismic motion.

Non-Patent Document 1 discloses a technique for mounting a smart technique including a sensor in an industrial plant as a technique for monitoring the influence on an industrial plant when an earthquake occurs.

Further, Patent Document 1 discloses a vibration monitoring system in which a structure is provided with a 3-axis acceleration sensor, and the measured values of the 3-axis acceleration sensor are collected via a wireless communication network to monitor the vibration of the structure. ..

Non-Patent Document 1: "INTERGRATED SMART SEISMIC RISKS MANAGEMENT" Proceedings of the ASME 2019 Pressure Vessels & Piping Conference PVP2019 July 14-19, 2019, San Antonio

Patent Document 1: Japanese Unexamined Patent Publication No. 2019-100914

The fuel-fired boiler used in the power plant is equipped with a fireplace and a cage portion, which are suspended and supported by a steel beam via a suspension rod. Then, in order to prevent the fireplace and the cage from swinging when an earthquake occurs, the steel column and the furnace and the steel column and the cage are connected via a scythe tie.

The furnace is a hollow box-shaped structure surrounded by a water wall formed by connecting heat transfer tubes through which boiler water flows inside with a membrane bar, whereas the cage portion is the box-shaped structure. A group of heat transfer tubes for convection heat transfer is installed inside. Therefore, there is a large difference between the mass per unit volume (mass density) of the furnace and the mass density of the cage portion. Specifically, the mass density of the furnace is very small compared to the mass density of the cage portion.

Therefore, when an earthquake occurs, the furnace and the cage will vibrate at their own cycles according to their respective rigidity and mass. Therefore, in order to estimate the degree of damage to the boiler due to seismic motion, it is peculiar to the boiler at the time of the earthquake. It is necessary to determine the degree of damage by focusing on the behavior.

Non-Patent Document 1 and Patent Document 1 merely disclose general techniques for vibration monitoring of industrial plants and power plants, and do not consider behavior peculiar to boilers. Therefore, at present, there is no technique for evaluating the degree of damage caused by seismic motion suitable for boilers, and there is a fact that it is desired.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a damage degree estimation technique focusing on the behavior peculiar to a boiler at the time of an earthquake.

In order to achieve the above object, the present invention has the configuration described in the claims. To give an example, the present invention is a boiler damage degree estimation system that estimates the degree of damage caused by an earthquake motion of a boiler provided with a cage portion at the rear of the furnace and the furnace portion, and is a furnace facing the cage portion in the furnace. A relative displacement detection sensor that detects the relative displacement of the rear wall and the cage front wall facing the furnace rear wall in the cage portion and outputs sensor data, and a boiler that estimates the degree of damage to the boiler based on the sensor data. The boiler damage degree estimation device includes a damage degree estimation device, and the boiler damage degree estimation device acquires the sensor data in time series, and based on the time series change of the relative displacement of the boiler, the progress process of the damage of the boiler. It is characterized in that the shape change amount of the furnace and the cage portion is analyzed and the analysis result is output.

According to the present invention, it is possible to provide a damage degree determination technique focusing on the behavior peculiar to a boiler at the time of an earthquake. Issues, configurations and effects other than those described above will be clarified by the following description of the embodiments.

Schematic block diagram of the boiler damage estimation system. The perspective view which shows an example of the structure of a boiler. A side view showing an example of a boiler configuration. The figure which shows the arrangement example (top view) of the relative displacement detection sensor. Hardware configuration diagram of boiler damage degree estimation device. Functional block diagram of the boiler damage degree estimation device. A flowchart showing the flow of the boiler damage degree estimation process. The figure which shows the time series change example of a relative displacement. The figure which shows the time series change example of a relative displacement. The figure which shows another example (horizontal cross section) of the damage degree estimation of a boiler. The figure which shows another example (right side view) of the damage degree estimation of a boiler.

Hereinafter, the boiler damage degree estimation system and the apparatus according to the embodiment of the present invention will be described with reference to the drawings. The same components are designated by the same reference numerals throughout the drawings, and duplicate description is omitted.

FIG. 1 is a schematic configuration diagram of a boiler damage degree estimation system 100.

The boiler damage degree estimation system 100 is configured by connecting a boiler unit 10 for detecting the seismic motion of a fuel-cooking boiler 1 installed in a thermal power plant and a boiler damage degree estimation device 300 via a cloud server 200.

The boiler unit 10 includes gauge sensors 101A1, ..., 101An, RTC11, and gauge sensors 101A1, ..., 101An as n relative displacement detection sensors installed in the boiler 1. A data collecting device 12 for adding and collecting time data acquired from the RTC 11 to the sensor data output by the cloud server 200, and a communication device 13 for transmitting the collected sensor data to the cloud server 200 are provided.

The relative displacement detection sensor observes the relative displacement between the furnace 2 provided in the boiler 1 and the cage portion 4, and outputs sensor data indicating the result. As a specific example of the relative displacement detection sensor, a gauge sensor is used in this embodiment, but a 3-axis accelerometer, a distortion sensor, an ultrasonic distance meter, or the like can be used. When a 3-axis accelerometer is used, a 3-axis accelerometer may be arranged in each of the furnace 2 and the cage portion 4, and the relative displacement may be calculated based on the time integral value of the acceleration. In the distortion sensor, the relative displacement is obtained from the output value of the distortion. Further, in the ultrasonic rangefinder, the relative displacement is obtained from the change in the distance between the furnace 2 and the cage portion 4.

The boiler damage degree estimation device 300 installed in the boiler maker 400 is connected to the cloud server 200. Further, each of the power generation company terminal 410 and the central operation room terminal 420 in the power plant may be connected to the cloud server 200.

The boiler damage degree estimation device 300 receives sensor data from the cloud server 200 and evaluates the damage degree of the boiler 1. Further, a countermeasure measure according to the evaluation result is devised and provided to the power generation company terminal 410 and the central control room terminal 420. Each of the power generation company terminal 410 and the central operation room terminal 420 may provide the boiler maker 400 with information necessary for estimating the state of the boiler 1, such as the execution result of the countermeasure and the operation load information.

An arrangement example of the boiler 1 and the relative position detection sensor will be described with reference to FIGS. 2, 3, and 4. FIG. 2 is a perspective view showing an example of the configuration of the boiler 1. FIG. 3 is a side view showing an example of the configuration of the boiler 1. FIG. 4 is a diagram showing an arrangement example (top view) of the relative displacement detection sensor.

The boiler 1 includes a fireplace 2 in which a combustion space is formed, a sub-side wall portion 3 forming a flow path for combustion gas generated in the fireplace 2, and heat exchangers such as a superheater, a reheater, and an economizer. The cage portion 4 mounted inside is mainly divided into three spaces. These three spaces are arranged side by side in the order of the furnace 2, the sub-side wall portion 3, and the cage portion 4 from the upstream side to the downstream side in the flow direction of the combustion gas.

In the following description, the arrangement direction of the furnace 2, the sub-side wall portion 3, and the cage portion 4 is defined as the "depth direction" (or the front-rear direction), and the furnace 2 side in the depth direction is referred to as "front side" or "upstream side". The cage portion 4 side on the opposite side is referred to as "rear side" or "downstream side". Further, the direction orthogonal to the floor surface on which the boiler 1 is installed is defined as the "vertical direction". Further, the direction orthogonal to the depth direction and the vertical direction is referred to as "horizontal direction".

The fireplace 2 has a fireplace front wall 21 arranged on the front side and front of the fireplace 2, a fireplace rear wall 22 arranged facing the fireplace front wall 21 and a rear surface of the fireplace 2, a fireplace front wall 21 and a fireplace. It includes a pair of fireplace side walls 23 arranged between the rear wall 22 and serving as side surfaces of the fireplace 2, and a fireplace ceiling wall 24 arranged above the pair of fireplace side walls 23 and serving as the ceiling of the fireplace 2.

A plurality of burners 20 for supplying fuel pulverized coal and air into the fireplace 2 are installed at the lower portions of the fireplace front wall 21 and the fireplace rear wall 22, respectively. In the present embodiment, eight burners 20 are arranged in two stages in the vertical direction, four on each of the fireplace front wall 21 and the fireplace rear wall 22.

The pulverized coal supplied from each burner 20 is burned in the combustion space in the furnace 2, whereby combustion gas is generated. The generated combustion gas flows in an ascending direction from the lower side to the upper side of the furnace 2, and then flows down to the cage portion 4 through the sub-side wall portion 3.

The sub-side wall portion 3 is a flow path that connects the furnace 2 and the cage portion 4 in the depth direction at the upper part. The sub-side wall portion 3 includes a pair of side walls 33 connected to the pair of fireplace side walls 23 to form side surfaces of the sub-side wall portion 3, and a ceiling wall 34 connected to the fireplace ceiling wall 24 to form the ceiling of the sub-side wall portion 3. A bottom wall 35, which is arranged below the pair of side walls 33 and serves as a bottom surface of the sub-side wall portion 3, is provided.

The upper end of the fireplace rear wall 22 and the connection portion with the bottom wall 35 are formed with a nose 22a formed by a recess formed by projecting the fireplace rear wall 22 toward the combustion space side of the fireplace 2.

The cage portion 4 is arranged to face the furnace rear wall 22 of the furnace 2 and is the front surface of the cage portion 4, and is arranged to face the cage front wall 41 and is the rear surface of the cage portion 4. The cage portion is connected to the cage rear wall 42, a pair of cage side walls 43 arranged between the cage front wall 41 and the cage rear wall 42 to form side surfaces of the cage portion 4, and the ceiling wall 34 of the sub-side wall portion 3. A cage ceiling wall 44, which is the ceiling of 4, is provided.

The upper end of the cage front wall 41 is connected to the bottom wall 35. This portion is referred to as a connection corner X.

As shown in FIG. 3, the furnace 2 is connected to a plurality of steel frame columns 12f provided in front of the furnace 2 via a plurality of scythe ties 13f. More specifically, the back stay 25f (hereinafter referred to as “front back stay”) provided on the front wall 21 of the fireplace and the steel frame column 12f are connected by a scythemic tie 13f.

Further, the cage portion 4 is connected to a plurality of steel frame columns 12b provided behind the cage portion 4 via a plurality of scythemic ties 13b. More specifically, the back stay 25b (hereinafter referred to as "rear back stay") provided on the rear wall 42 of the cage and the steel frame column 12b are connected by a scythemic tie 13b.

In the boiler 1, each wall constituting the fireplace 2, the sub-side wall portion 3, and the cage portion 4 alternately has a heat transfer tube through which a fluid flows and a plate-shaped membrane bar extending in the direction in which the heat transfer tube extends. It is formed of a bonded panel-shaped membrane wall.

As shown in the enlarged view of FIG. 3, a front back stay 25f made of H-shaped steel is attached to the rear wall 22 of the fireplace. A rear back stay 25b made of H-shaped steel is also attached to the front wall 41 of the cage.

When an earthquake occurs, stress is concentrated on the part where the flow direction of the combustion gas that continues from the furnace 2 to the sub-side wall portion 3 and the cage portion 4 changes, particularly the nose 22a and the connection corner X, which easily leads to damage.

Therefore, as shown in FIG. 4, the three gauge sensors 101A1, 101A2, along the extending direction (left-right direction of the boiler 1) of the front back stay 25f at the height position L1 (the height where the nose 22a is), Install 101A3.

Further, three gauge sensors are also arranged on the front back stay 25f at the height position L2 below the height position L1.

Further, three gauge sensors are also arranged on the front back stay 25f at the height position L3 below the height position L2. Therefore, a total of 9 gauge sensors are arranged. The number and location of installation of the sensor is only an example, and the number and location of installation may be different from that of the present embodiment.

FIG. 5 is a hardware configuration diagram of the boiler damage degree estimation device 300.

The boiler damage degree estimation device 300 includes a processor 301, a RAM (Random Access Memory) 302, a ROM (Read Only Memory) 303, an HDD (Hard Disk Drive) 304, an input I / F305, an output I / F306, and a communication I / F307. These are configured using computers connected to each other via bus 308.

The processor 301 may be a GPU (Graphics Processing Unit) or a CPU (Central Processing Unit), and may be of any type as long as it is a device that executes an arithmetic function. Further, the hardware configuration of the boiler damage degree estimation device 300 is not limited to the above, and may be configured by a combination of a control circuit and a storage device. The boiler damage degree estimation device 300 is configured by the processor 301 executing the boiler damage degree estimation program that realizes each function of the boiler damage degree estimation device 300, or by the control circuit calculating.

An input device 311 such as a mouse, keyboard, and touch panel is connected to the input I / F 305.

A display 312 including an LCD, an organic panel, or the like is connected to the output I / F 306.

A cloud server 200 and an external communication device 210 for receiving emergency event information are connected to the communication I / F 307.

FIG. 6 is a functional block diagram of the boiler damage degree estimation device 300. The boiler damage degree estimation device 300 is based on a receiving unit 350 that receives sensor data from the cloud server 200 and also receives emergency event information from an external communication device, a sensor data storage unit 354 that stores sensor data, and sensor data. In response to the estimation results of the damage degree estimation unit 356 that analyzes the relative displacement of the boiler 1 along the time series to estimate the damage degree and the damage degree estimation unit 356, the operation of the power plant where the boiler 1 is installed continues. The operation continuation possibility standard information output unit 358 that outputs check item information that serves as a reference for determining whether or not the boiler 1 can be used, and the damage degree estimation result of the boiler 1 and the operation continuation possibility standard information can be obtained from the power generation company terminal 410 and the central operation room terminal. It includes a transmission unit 360 for transmitting to and to 420, and an output unit 362. In the present embodiment, it is described that the sensor data is time-stamped and stored in the cloud server 200. However, the boiler damage degree estimation device 300 is also provided with an RTC (Real Time Clock) 352 and the received sensor. A time stamp from RTC352 may be added to the data and stored in the sensor data storage unit 354. This enables time-series analysis even if there is a problem with the RTC 11 on the boiler 1 side.

FIG. 7 is a flowchart showing the flow of the boiler damage degree estimation process according to the present embodiment. As a premise for carrying out the following processing, the boiler damage degree estimation device 300 sets a warning threshold value for relative displacement of the fireplace rear wall 22 and the cage front wall 41.

While the boiler 1 is in operation, the boiler damage degree estimation system 100 is in operation. While the boiler damage degree estimation system 100 is in operation, each gauge sensor 101A1, 101A2, ..., 101An outputs sensor data and transmits it to the cloud server 200. The boiler damage degree estimation device 300 acquires sensor data from the cloud server 200 (S101).

When no earthquake has occurred (S102: NO), the boiler damage degree estimation device 300 monitors the time-series change of each acquired sensor data (S115). As shown in FIG. 8A, the time-series change of the relative displacement in normal times is almost 0.

When an earthquake occurs (S102: YES) and an emergency event (fire / tsunami) that cannot be controlled by monitoring is detected (S103: YES), the boiler 1 is urgently stopped (S109). An emergency event occurs, for example, when a fire alarm signal for boiler 1 is received, or when information is received that a tsunami with a height exceeding the embankment is observed in the area where boiler 1 is installed. You may judge that it was done.

If the occurrence of an emergency event is not detected or the prediction is not detected (S103: NO), the boiler damage degree estimation device 300 determines whether the relative displacement indicated by all the sensor data is less than the warning threshold value (S104). FIG. 8B shows an example in which the relative displacement due to the earthquake falls within the warning threshold. With the occurrence of an earthquake, the time-series changes in relative displacement fluctuate in the positive and negative directions, but the peak values in the positive and negative directions are within the positive and negative directions of the warning threshold. In this case, it is determined that the relative displacement indicated by the sensor data is less than the warning threshold.

If the relative displacement indicated by all the sensor data is less than the warning threshold (S104: YES), the power generation company terminal 410, the central operation room terminal 420, and the equipment inspector are notified of the determination result, and the equipment inspector notifies the boiler 1. Visually inspect the surrounding environment for any abnormalities. If there is no abnormality (S105: YES), the operation of the boiler 1 is continued (S106). If there is an abnormality (S105: NO), the process proceeds to step S108.

When the boiler damage degree estimation device 300 determines that the displacement indicated by one or more sensor data is equal to or greater than the warning threshold (S104: NO), the boiler damage degree estimation device 300 estimates the damage degree of the boiler 1. S107).

When the boiler damage degree estimation device 300 obtains the analysis result of the waveform shown in FIG. 9A, a large shaking occurs in a minute time from t1 to t2, and the one shaking causes the furnace 2 and the cage portion 4 to shake at once. It is presumed that the damage torn has occurred.

As another example, it is assumed that the waveform shown in FIG. 9B is obtained as a result of analyzing the cumulative value of the relative displacement by the boiler damage degree estimation device 300. FIG. 9B shows that there were several earthquakes from t1 to t3, the relative displacement between the furnace 2 and the cage portion 4 changed each time, and the cumulative value of the change exceeded the warning threshold. means. The cumulative value of relative displacement is used for the diagnosis of remaining life. The remaining life diagnosis here is a design guarantee even if the actual cumulative displacement, that is, when the remaining life exceeds 0%, the relevant part of the structure is not actually damaged. It refers to diagnosing a state in which it cannot be done (a state in which damage (crack) can occur at any time with a slight impact). It cannot be grasped from the visual inspection that the state cannot be guaranteed by design or the state that cannot be guaranteed by design is approaching, but according to the remaining life diagnosis by the boiler damage degree estimation device 300, it is actually. It is possible to grasp in advance and take countermeasures before damage.

In this way, the boiler damage degree estimation device 300 quantitatively estimates the process of damage and the degree of damage based on the time-series changes leading to the estimation that the relative displacement exceeding the warning threshold has occurred. As an estimation example of damage, the amount of shape change such as how many centimeters the furnace 2 and the cage portion 4 are torn may be expressed by a concrete numerical value. In this example, by using the 3-axis acceleration sensor as the relative displacement sensor, not only the relative displacement but also the motion direction can be analyzed, so that the motion direction and the amount of shape change can be analyzed.

In FIGS. 9A and 9B, since the shape change (destruction) in which the relative displacement exceeds the warning threshold value occurs, damage to the boiler 1 can be confirmed by visual inspection.

On the other hand, in FIG. 8B, after the peak value of the fluctuation of the relative displacement is exceeded, the relative displacement is almost 0, that is, the shape change does not occur, so that no abnormality is found by visual inspection. However, since the relative displacement is actually generated by the seismic motion, stress concentration occurs due to the shaking caused by the seismic motion at the connecting portion between the furnace 2 and the cage portion 4, for example, the nose 22a and the connecting corner X, and metal fatigue occurs. there is a possibility. In this case, the boiler damage degree estimation device 300 may estimate structural damage that cannot be detected by visual inspection. As an estimation example, for example, the time cumulative value of the relative displacement may be calculated, the result of comparison with the durability performance at the time of designing the boiler 1 may be output, and the remaining life of the boiler 1 may be estimated.

FIG. 10 shows another example (horizontal cross section) of the damage degree estimation of the boiler 1 by the boiler damage degree estimation device 300. In the example of FIG. 10, the boiler damage degree estimation device 300 is the furnace on the left side of the boiler 1 at the time of an earthquake, based on the relative displacements of the gauge sensors installed on the left side and the right side of the boiler 1 at the height position L1. _-Calculate the distance IL between the cages and the distance IR between the boiler 1 right side of the boiler at the time of an earthquake-the _cage . Then, the boiler damage degree estimation device 300 obtains the shape of the boiler 1 in the horizontal cross section at the height position L1.

Further, the boiler damage degree estimation device 300 estimates the horizontal cross-sectional shapes at different height positions L1, L2, and L3, and stacks them in the height direction to visualize the pseudo-three-dimensional deformation of the boiler 1. May be presented.

FIG. 11 shows another example (right side view) of the damage degree estimation of the boiler 1 by the boiler damage degree estimation device 300. In the example of FIG. 11, the boiler damage degree estimation device 300 is based on the relative displacements of the gauge sensors installed at the upper part and the lower part of the boiler 1, and the distance I between the furnace and the cage part of the upper part of the boiler 1 at the time of an earthquake. _{Find U} and the distance _ID between the furnace and the cage at the bottom of boiler 1 at the time of an earthquake. Then, the boiler damage degree estimation device 300 obtains the shape of the boiler 1 in the right side view.

After the damage degree estimation process (S107), or when the boiler damage degree estimation device 300 receives a notification that there is an abnormality in the surrounding situation (S105: NO), the boiler damage degree estimation device 300 is operated by the operation of the central operation room. It is determined whether or not the criteria (criteria for whether or not operation can be continued) indicating whether or not continuation is possible are satisfied (S108). The determination of this step may be made by the boiler damage degree estimation device 300 itself when the boiler damage degree estimation device 300 has acquired the operation data of the boiler 1. Further, the boiler damage degree estimation device 300 only acquires seismic data excluding sensor data such as sensor data and seismic intensity data, and the power generation company may satisfy the operation continuation feasibility criteria. On the other hand, when the boiler damage degree estimation device 300 has not acquired the operation data of the boiler 1, the check item information as to whether or not the operation continuation possibility standard is satisfied is transmitted to the power generation company terminal 410 and the central operation room terminal 420. Make a decision by sending and receiving the results. If the result cannot be received, the check item information is provided in step S108, and the process skips to step S114.

Further, the peripheral condition of the boiler 1 is visually inspected in step S105, and the peripheral condition is grasped not only from the visual inspection but also from the degree of damage to the boiler and, for example, the image of the fixed point camera remotely.

When the boiler damage degree estimation device 300 determines that the operation continuation possibility criterion is not satisfied (S108: NO), a proposal to stop the boiler 1 in an emergency is transmitted to the central operation room terminal 420 (S109).

When the boiler damage degree estimation device 300 determines that the operation continuation possibility criterion is satisfied (S108: YES), a proposal to stop the boiler 1 in a planned manner is transmitted to the central operation room terminal 420 (S110).

After the boiler 1 has an emergency stop (S109) and a planned stop (S110), the boiler 1 is inspected (S111), repaired (including seismic retrofitting) as necessary (S112), and the boiler 1 is operated. Resume (S113).

When continuing the monitoring process of the boiler 1 (S114: YES), the process returns to step S101 and the process is repeated.

When the monitoring process of the boiler 1 is terminated (S114: NO), a series of processes is terminated.

According to this embodiment, it is possible to quantitatively evaluate the degree of boiler damage by comparing the boiler seismic motion monitoring measurement result with a preset warning threshold value.

In addition, by adding and accumulating the boiler seismic motion monitoring measurement results as cumulative data in the time series direction and estimating the degree of damage to the boiler using the results, it can be applied to the diagnosis of the remaining life, and the degree of cumulative damage to the boiler 1 can be measured. Quantitative evaluation is also possible.

Furthermore, by realizing a boiler damage degree estimation system using the cloud, it is possible to estimate the damage degree of the boiler 1 remotely and in real time. This makes it possible to remotely grasp the degree of damage without risking a catastrophic disaster and rushing to the site.

The above-described embodiment represents only one embodiment of the present invention, and various modifications that do not deviate from the gist of the present invention are included in the technical scope of the present invention.

For example, in the process of determining whether the relative displacement indicated by all the sensor data is less than the warning threshold in step 104 of FIG. 7, in the above description, the relative displacement of each sensor data and the warning threshold are compared, but all the sensors. The maximum value of the relative displacement indicated by the data may be obtained and the maximum value may be compared with the warning threshold value.

Further, as the warning threshold value, the position of the furnace 2 and the cage portion 4, for example, the lower the height, the larger the value may be used.

1: Boiler 2: Boiler 3: Sub-side wall 4: Cage 10: Boiler unit 11: RTC
12: Data collection device 12b: Steel pillar 12f: Steel pillar 13: Communication device 13b: Scymic tie 13f: Scymic tie 20: Burner 21: Fireplace front wall 22: Fireplace rear wall 22a: Nose 23: Fireplace side wall 24: Fireplace Ceiling wall 25b: Rear back stay 25f: Front back stay 33: Side wall 34: Ceiling wall 35: Bottom wall 41: Cage front wall 42: Cage rear wall 43: Cage side wall 44: Cage ceiling wall 100: Boiler damage estimation system 101A1: Gauge sensor 101A2: Gauge sensor 101A3: Gauge sensor 200: Cloud server 210: External communication device 300: Boiler damage degree estimation device 301: Processor 305: Input I / F
306: Output I / F
307: Communication I / F
308: Bus 311: Input device 312: Display 350: Receiver 352: RTC
354: Sensor data storage unit 356: Damage degree estimation unit 358: Operation continuation standard information output unit 360: Transmission unit 400: Boiler maker 410: Power generation company terminal 420: Central operation room terminal

Claims (8)

A boiler damage estimation system that estimates the degree of damage caused by seismic motion of a boiler equipped with a cage at the rear of the furnace and the furnace.
A relative displacement detection sensor that detects the relative displacement of the rear wall of the fireplace facing the cage portion in the fireplace and the front wall of the cage facing the rear wall of the fireplace in the cage portion and outputs sensor data.
A boiler damage degree estimation device for estimating the damage degree of the boiler based on the sensor data is provided.
The boiler damage degree estimation device acquires the sensor data along the time series, and based on the time series change of the relative displacement of the boiler, the progress process of the damage of the boiler and the shape of the furnace and the cage portion. Analyze the amount of change and output the analysis result,
Boiler damage estimation system characterized by this. In the boiler damage degree estimation system according to claim 1,
Further equipped with a data collection device that collects the sensor data from the relative displacement detection sensor and transmits it to the cloud server.
The boiler damage degree estimation device acquires the sensor data from the cloud server.
Boiler damage estimation system characterized by this. In the boiler damage degree estimation system according to claim 2,
The boiler damage degree estimation device is communication-connected to at least one of a power generation company terminal that performs a power generation business using the boiler or a central operation room terminal of a power plant in which the boiler is installed.
The analysis result is transmitted to the power generation company terminal or the central operation room terminal.
Boiler damage estimation system characterized by this. In the boiler damage degree estimation system according to claim 3,
When the boiler damage degree estimation device determines that the relative displacement is equal to or higher than a predetermined warning threshold, the power generation company terminal or the power generation company terminal or the power generation company terminal or Sending to the central control room terminal,
Boiler damage estimation system characterized by this. In the boiler damage degree estimation system according to claim 4,
When there are a plurality of the check items, the boiler damage degree estimation device prioritizes the check items related to the portion where the shape change amount of the boiler is large and transmits the check items to the power generation company terminal or the central operation room terminal. do,
Boiler damage estimation system characterized by this. In the boiler damage degree estimation system according to claim 1,
The rear wall of the fireplace is configured by arranging a plurality of heat transfer tubes arranged in parallel with the vertical direction in the left-right direction, and is provided with a front back stay extending in the left-right direction by connecting the plurality of heat transfer tubes.
The front wall of the cage is configured by arranging a plurality of heat transfer tubes arranged in parallel with the vertical direction in the left-right direction, and includes a rear back stay extending in the left-right direction by connecting the plurality of heat transfer tubes.
A plurality of relative displacement detection sensors are arranged on the front backstay or the rear backstay along the extending direction of the front backstay or the rear backstay.
The boiler damage degree estimation device analyzes shape changes in the horizontal cross section of the furnace and the cage portion based on the relative displacements of both ends in the extending direction.
Boiler damage estimation system characterized by this. In the boiler damage degree estimation system according to claim 6,
The rear wall of the fireplace comprises a plurality of stages of the front backstays provided at different height positions.
The cage front wall comprises a plurality of stages of the rear backstays provided at different height positions.
A plurality of relative displacement detection sensors are arranged in each stage of the front back stay or each stage of the rear back stay.
The boiler damage degree estimation device analyzes the amount of shape change in the surface of the furnace and the cage portion along the vertical direction based on the relative displacements of the upper and lower portions of the front back stay or the rear back stay.
Boiler damage estimation system characterized by this. A boiler damage estimation device that estimates the degree of damage caused by seismic motion of a boiler equipped with a cage at the rear of the furnace and the furnace.
A receiving unit that receives sensor data output from the cloud server by detecting the relative displacement of the rear wall of the fireplace facing the cage portion in the fireplace and the front wall of the cage facing the rear wall of the fireplace in the cage portion.
A damage degree estimation unit for estimating the damage degree of the boiler based on the sensor data is provided.
The damage degree estimation unit calculates the time-series change of the relative displacement of the boiler based on the acquired sensor data, and the progress process of the damage of the boiler and the amount of change in the shape of the rear wall of the fireplace and the cage portion. And output the analysis result,
Boiler damage degree estimation device characterized by this.

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