JP2019207036A - Boiler monitoring system - Google Patents

Abstract

To improve accuracy in determining component life in a boiler monitoring system determining the component life on the basis of a boiler operation data and a component life set value.SOLUTION: A boiler monitoring system is composed of a boiler 2 and a boiler monitoring device 3, and determines a life of an object component by comparing a life set value determined for each of components constituting the boiler, with a life determination value calculated from the operation data of the boiler. The boiler monitoring system calculates a combustion time as the operation data of the boiler for each of combustion positions of high combustion and low combustion, determines a coefficient for weighting each of combustion positions determined for each of object components in advance, multiplies the combustion time of each combustion position by the coefficient weighted according to the combustion position to calculate the sum as the life determination value of an object product, and determines the life of the object component by comparing the calculated life determination value with the life set value.SELECTED DRAWING: Figure 1

Description

  In the present invention, a boiler and a boiler monitoring device are connected by a communication means, and the boiler monitoring device collects operating data in the boiler to determine the lifespan of components constituting the boiler. It relates to a monitoring system.

As described in Japanese Patent Application Laid-Open No. 2003-42405, the boiler and the boiler monitoring device are connected by communication means, and a life database in which the lifetime of the parts constituting the boiler is set is constructed in the boiler monitoring device. The life of the boiler components is determined in the boiler monitoring device by sending information on the operating state of the boiler from the boiler to the boiler monitoring device. The boiler operation status data to be collected includes combustion time, number of ignitions, number of water supply, etc., when the accumulated combustion time obtained by integrating the daily data reaches the set time or when the accumulated number of ignitions reaches the set number The target part is determined to have a lifetime. The life of boiler components can be determined from boiler operation data, and parts can be avoided in advance by replacing parts before they actually occur. be able to.

However, the life may not be correctly determined only by the combustion time and the number of ignitions. In the boiler, the combustion position is set such as high combustion, medium combustion, and low combustion, and the combustion position is changed according to the load. In this case, the turndown, which is the ratio of high combustion to low combustion, may be 7: 1, and the combustion position varies, so even if the combustion time is the same, the degree of deterioration of the parts depends on the ratio of the combustion position. May be different. In the case where the degree of deterioration of the component increases due to the increase in the number of ignitions in addition to the combustion time, the error may increase if the life is determined by integrating the combustion time and the number of ignitions independently. For this reason, it has been desired to further increase the accuracy of component life determination.

JP 2003-42405 A

  The problem to be solved by the present invention is to provide a boiler monitoring system that can further improve the accuracy of component life determination in a boiler monitoring system that determines component life based on boiler operation data and the life set value for each component. It is to provide.

The invention according to claim 1 is a boiler monitoring system comprising a boiler and a boiler monitoring device that collects information from the boiler and monitors the operation of the boiler, and has a service life in which a life set value is input for each part constituting the boiler. Stores the accumulated value of the boiler operation data consisting of the set value database and boiler combustion time, etc., and has a life judgment value calculation device that calculates the life judgment value for each part from the operation data. In the boiler monitoring system that determines the life of the target part by comparing the life set value with the life set value, the combustion time as the operation data of the boiler is calculated for each combustion position such as high combustion or low combustion. A coefficient for weighting each combustion position is set, and the combustion time for each combustion position is multiplied by the coefficient weighted by the combustion position. It was calculated as the life determination value of the target product, characterized in that it is possible to determine the life of the target component in the calculated life determination value and comparing the life setting value.

  According to a second aspect of the present invention, in the boiler monitoring system described above, the integrated values of the operation data of the boilers composed of different plural elements such as the combustion time and the number of ignitions of the boiler are stored, and the coefficients of the plural elements are respectively set. When determining the lifespan of the target part, in addition to the product of the combustion time for each combustion position multiplied by the coefficient weighted by the combustion position, different types of operation data such as the number of ignitions The sum of the product and the coefficient is calculated as the life judgment value of the target product, and the life of the target part is judged by comparing the calculated life judgment value with the life set value. .

  According to a third aspect of the present invention, in the boiler monitoring system, the boiler monitoring device is installed at a monitoring base that is remote from the boiler via communication means, and calculates the lifetime setting value database and lifetime determination value. The apparatus is provided in a boiler monitoring apparatus at a monitoring base.

By carrying out the present invention, it becomes possible to more accurately determine the lifetime of the parts constituting the boiler.

The block diagram of the boiler monitoring system in one Example of this invention

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of a boiler monitoring system including a boiler and a boiler monitoring device in one embodiment. The boiler 2 is provided with many auxiliary devices such as a burner, a blower, a fuel supply device, and a water supply device, and operates as a boiler by controlling the operation of each device. The boiler is provided with a control device, and the control device controls the operation of each auxiliary device based on the detected steam pressure value and the like, and automatically controls the operation of the boiler. When the boiler combustion control is four-position control of high combustion, medium combustion, low combustion, and stop, if the current steam pressure is below the lower limit of the steam pressure adjustment range, high combustion, higher than the lower limit, but the steam pressure adjustment range The combustion position is adjusted such that medium combustion occurs when the pressure is relatively low, low combustion occurs when the pressure is relatively high within the steam pressure adjustment range, and combustion stops when the pressure is higher than the steam pressure adjustment range.

When centrally monitoring the boilers 2 that are scattered in remote locations, the boiler manufacturer provides a monitoring base 6, and the boiler monitoring device 3 installed at the monitoring base 6 allows each user's office, etc. The operation state of the boiler 2 installed in is monitored. By connecting the boiler monitoring device 3 at the monitoring base 6 and the boiler 2 at the boiler installation site 4 with the wide-area communication line 1 provided by the communication company and the communication device 5, it is separated from the monitoring base 6. A large number of boilers scattered in the position can be intensively monitored by the boiler monitoring device 3 installed in the monitoring base 6. In the boiler 2, boiler operation state data is periodically transmitted to the boiler monitoring device 3 of the monitoring base 6, and the abnormality content is also transmitted to the boiler monitoring device 3 when an abnormality occurs in the boiler.

  The boiler monitoring device 3 of the monitoring base 6 collects information from the monitored boiler, and when an abnormality occurs in the boiler, reports the occurrence of the abnormality to a user of the relevant boiler, a maintenance staff, or the like. The notification of the occurrence of abnormality is sent by e-mail to the portable terminal 8 or the personal computer 7 held by the person in charge of maintenance. The person in charge of maintenance who has received the abnormality notification mail goes to the boiler installation place 4 and takes measures for the abnormality.

In the boiler monitoring device 3 at the monitoring base 6, the operation status of the boiler can be grasped by collecting and processing the operation data of each boiler. Operation data sent from each boiler, such as the combustion time, the number of ignitions, and the number of water supply, are accumulated and stored for each boiler. The operation status of the boiler can be ascertained by summing up the amount for one week or one month of the amount, the evaporation amount, and the chemical injection amount and outputting it as a weekly or monthly report.

Then, the boiler monitoring device 3 uses the operation data collected to make it possible to detect the lifetime of the parts constituting the boiler. If the life of the parts can be predicted, it is possible to prevent the boiler from being abnormal by exchanging the target parts according to the life.

The boiler monitoring device 3 includes a life setting value database in which life setting values for determining the life of components that require life management among components constituting each auxiliary device of the boiler, and determination of component life A life judgment value calculation device for calculating a life judgment value to be used is installed. In the lifetime determination value calculation device, operation data such as the combustion time, the number of ignitions, and the number of water supply of each boiler is accumulated for each boiler and stored, and the lifetime determination value is calculated from the operation data. The life determination value is calculated by calculating an integrated value of the operation data and multiplying the calculated integrated value of the operation data by a coefficient. The boiler monitoring device 3 determines the life of the part by comparing the set life set value with the calculated life judgment value. If the life judgment value exceeds the life set value, the corresponding part has reached the life. Output such as notifying that it is the inspection time.

When the life of a part can be estimated, it is possible to estimate the cause of an abnormality when an abnormality occurs in the boiler. When an abnormality occurs, the boiler monitoring device 3 determines the lifetime of the incidental device related to the abnormality content, and searches for an incidental device that has reached the lifetime or will soon reach the lifetime as a candidate for an abnormal location. When information on the occurrence of an abnormality is sent from the boiler monitoring device 3 to the portable terminal 8 such as a maintenance person, a part that may be abnormal is determined along with the content of the abnormality.

At the time of repair, the equipment that has a high possibility of occurrence of an abnormality is examined in order, but by narrowing down the candidate of the abnormal part from the viewpoint of life, the abnormality part can be found quickly and the time required for recovery can be shortened. Can do. If the location of the abnormality can be identified before the boiler diagnosis, replacement parts can be prepared for repair and the recovery time can be further shortened.

The lifetime setting value used for determining the component lifetime in the boiler monitoring device is set based on operation data such as the combustion time and the number of ignitions. For example, the life value can be set based on the combustion time if the component for determining the life is water level glass, the number of times of ignition if it is an ignition transformer, and the number of times of water supply if it is a water supply solenoid valve. As the value of the lifetime data, an exchange cycle is set if the target device is a consumable, and a cleaning cycle or an adjustment cycle is set if it is recovered by cleaning or adjustment. Note that it is too late to determine the life after the end of the life, and it is necessary to consider variations, so the value of the life data is set to a value slightly shorter than the actual life.

When the device for determining the lifetime is a blower, the lifetime of the blower is affected by the operation time and the number of operations, and if the rotation speed of the blower is changed during operation, the rotation speed is also affected. In the case of a boiler that changes the combustion position, it is necessary to increase the supply amount of combustion air when the combustion amount is large, and the combustion air supply amount is increased by increasing the rotational speed of the blower. Therefore, the larger the amount of combustion, the higher the rotational speed of the blower, and the deterioration of the blower is more likely to proceed. Furthermore, since the load increases when the blower is started, the number of ignitions is also affected. The element that determines the life of a blower is a composite of the combustion position, combustion time, and number of ignitions of the boiler. Becomes larger.

Therefore, in such a case, the life is determined by combining the combustion time and the number of ignitions for each combustion position, and high combustion time × high combustion coefficient H1 + medium combustion time × medium combustion coefficient M1 + low combustion time × low combustion coefficient L1 + number of times of ignition × number of times of ignition is weighted according to the combustion position so as to be calculated as a life determination value.

When there are a plurality of parts whose life should be managed, such as bearings and V-belts, in the blower, the life setting value and coefficient are determined for each. For example, when the life of the blower V-belt is determined, the blower V-belt life set value is 5000 with a high combustion coefficient H1 = 2, a medium combustion coefficient M1 = 1, a low combustion coefficient L1 = 0.3, and a combustion frequency coefficient = 0.1. Set as follows. Although the combustion time in the boiler changes every day, the daily operation data is the same for the sake of simplicity, and the daily operation time is 1 hour for high combustion, 5 hours for medium combustion, and 2 hours for low combustion. Assume that the number of ignitions is 30 times / day. In the boiler monitoring device 3, the boiler operation data is integrated, and a life determination value is calculated based on data such as the integrated combustion time to determine the life. In the case of the above example, the life judgment value when 472 days have elapsed is 1 × 472 × 2 + 5 × 472 × 1 + 2 × 472 × 0.3 + 30 × 472 × 0.1 = 944 + 2360 + 283.2 + 1416 = 5003.2, and the fan V belt Since the life set value of 5000 is exceeded, it is determined that the V belt has reached the end of life when 472 days have elapsed.

In the case of a blower or bearing, the rotational speed of the blower that varies depending on the combustion position affects the life, but the number of ignitions does not significantly affect the life, so the life is determined by the combustion time for each combustion position without including the number of ignitions. Higher combustion time × high combustion coefficient H1 + medium combustion time × medium combustion coefficient M1 + low combustion time × low combustion coefficient L1 weighted according to the combustion position is calculated as the life judgment value of the blower bearing. When the blower bearing life set value is 10,000 when the high combustion coefficient H1 = 2, the medium combustion coefficient M1 = 1, and the low combustion coefficient L1 = 0.3, the daily operation time is high combustion 1 hour, medium Assuming 5 hours of combustion and 2 hours of low combustion, the data after 1316 days is 1 × 1316 × 2 + 5 × 1316 × 1 + 2 × 1316 × 0.3 = 2632 + 6580 + 789.6 = 10001.6, and the blower bearing life Since the set value exceeds 10,000, it is determined that the blower bearing has reached the end of its life when 1316 days have elapsed.

When the device for determining the life is a water supply pump, the life of the water supply pump is affected by the operation time of the water supply pump and the number of times of water supply. However, since the water supply time is not necessarily an item necessary for monitoring the operation of the boiler, the water supply time may not be measured. When the water supply time is calculated, the life of the water supply pump is determined based on the water supply time. However, when the water supply time is not calculated, it is considered to determine the life using another index. Here, the determination value of the life is determined from the combustion time of the boiler and the number of times of water supply. As the boiler combustion volume increases, the amount of water supplied to the boiler increases and the operation time of the feed water pump increases, so the life of the feed water pump is determined based on the combustion time at each combustion position and the number of times of water supply. , High combustion time × high combustion coefficient H2 + medium combustion time × medium combustion coefficient M2 + low combustion time × low combustion coefficient L2 + number of water supply times × water supply frequency coefficient weighted according to the combustion position as the life judgment value of the water supply pump calculate.

For example, when determining the life of the feed water pump, the life set value is set to 100000 with a high combustion coefficient H2 = 6, a medium combustion coefficient M2 = 3, a low combustion coefficient L2 = 1, and a water supply frequency coefficient = 0.1. If the daily operation time is 1 hour for high combustion, 5 hours for medium combustion, 2 hours for low combustion, and the number of times of water supply is 200 times / day, the life pump life judgment value is calculated based on data such as the accumulated combustion time. Calculate the lifetime. In the case of the above example, the data when 2326 days have elapsed is 1 × 2326 × 6 + 5 × 2326 × 3 + 2 × 2326 × 1 + 200 × 2326 × 0.1 = 13956 + 34890 + 4652 + 46520 = 100018, which exceeds the water pump life set value of 100,000. , It is determined that the water supply pump has reached the end of its life when 2326 days have passed.

The coefficient and the life judgment value need to be set for each part for judging the life, but the life judgment itself can be automatically performed by a program. When a notification that a part has reached the end of its life is given, the person in charge of the target boiler replaces the apparatus that has reached the end of its life. Even if a device that has reached the end of its life is operating normally at that time, if it continues to be used as it is, an abnormality will occur in that portion, and the possibility of abnormally stopping the boiler is increased. By diagnosing the life of the device and replacing / adjusting the device that has reached the end of the life before the actual failure occurs, it is possible to prevent the boiler from stopping abnormally.

When the life judgment value reaches the life set value and an output for reaching the life is performed, the life judgment value is reset once and accumulated again. It is necessary to perform the life determination of the parts many times while the boiler is used, and the next life determination can be performed by resetting the life determination value. When the life determination is performed at the monitoring base, the reset of the life determination value can be performed at the monitoring base. If the lifespan of parts is to be determined by individual boilers, it is necessary to reset the lifespan judgment value at the individual boiler installation location, but resetting of lifespan judgment values is rarely done. Therefore, it is possible to forget to reset due to other work. If the operation is performed at a monitoring base that monitors a large number of boilers, the life determination value is reset more routinely, and thus is performed more reliably. In addition, when the operation data is accumulated at the monitoring base, the operation data can be easily backed up. If the operation data is saved only on the boiler side, the operation data may be lost due to an abnormality in the boiler control board, etc.If the operation data is saved at the monitoring base Can be a more reliable system.

The present invention is not limited to the embodiments described above, and many modifications can be made by those having ordinary knowledge in the art within the technical idea of the present invention.

1 communication line
2 Boiler
3 Boiler Monitoring Device 4 Boiler Installation Location 5 Communication Device 6 Monitoring Base 7 Personal Computer 8 Mobile Terminal

Claims (3)

A boiler monitoring system comprising a boiler monitoring device that collects information from the boiler and the boiler and monitors the operation of the boiler, a life setting value database in which life setting values are input for each part constituting the boiler, and boiler combustion time It has a life judgment value calculation device that calculates the life judgment value for each part from the operation data, and stores the integrated value of the boiler operation data consisting of etc., and compares the calculated life judgment value with the life setting value In the boiler monitoring system in which the life of the target part is determined in step 3, the combustion time, which is the operation data of the boiler, is calculated for each combustion position such as high combustion and low combustion, and for each combustion position determined for each target part. The weight of the target product is set, and the sum of the product of the combustion time at each combustion position multiplied by the coefficient weighted according to the combustion position is used. Boiler monitoring system, characterized in that as calculated as the determination value, determining the life of the target component by comparing the calculated life determination value and the life setting value.   In the boiler monitoring system according to claim 1, the integrated value of the operation data of the boiler composed of different elements such as the combustion time and the number of ignitions of the boiler is stored, and the coefficient of the plural elements is set. When determining the life of the target part, in addition to the product of the combustion time at each combustion position multiplied by the coefficient weighted by the combustion position, the coefficient is multiplied by different types of operation data such as the number of ignitions. A boiler monitoring system characterized in that the sum of things is calculated as a life judgment value of a target product, and the life of the target part is judged by comparing the calculated life judgment value with the life set value. 3. The boiler monitoring system according to claim 1, wherein the boiler monitoring device is installed at a monitoring base that is remote from the boiler via communication means, and the lifetime setting value database and the lifetime determination value calculation device are monitored. Boiler monitoring system characterized in that it is installed in a boiler monitoring device at an industrial site.

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