阅读说明：本技术 工厂设备监视控制系统以及工厂设备监视控制方法 (Plant monitoring and controlling system and plant monitoring and controlling method ) 是由 大谷侑士 于 2019-01-18 设计创作，主要内容包括：通过在工厂中在不增加中央操作室的负荷的情况下判定工厂设备的运转值的设定值的最佳值,实现工厂设备的健全性、运转成本的减少等,并且实现每日的运行的最佳运转指南。因此,设置对规定期间内的第1工厂设备(303)的动作状态进行解析的设备状态监视装置(331),设备状态监视装置(331)对第1工厂设备(303)的动作状态进行解析,根据该解析结果进行最佳运转值的判定。(The optimum value of the set value of the operation value of the plant equipment is judged in the plant without increasing the load of the central operation room, thereby realizing the soundness of the plant equipment, the reduction of the operation cost and the like, and realizing the optimum operation guide of daily operation. Therefore, an equipment state monitoring device (331) for analyzing the operation state of the 1 st plant equipment (303) within a predetermined period is provided, and the equipment state monitoring device (331) analyzes the operation state of the 1 st plant equipment (303) and determines the optimum operation value based on the analysis result.)

1. A plant monitoring and control system comprising:

a plurality of plant devices including a 1 st plant device;

a plurality of monitoring control devices provided in correspondence with the plurality of plant apparatuses, respectively;

a plurality of sensors provided to the plurality of plant devices;

a monitoring device that collects sensor measurement values from the plurality of sensors of the plurality of plant equipment;

a central control device that continuously monitors the sensor measurement values collected by the monitoring device and instructs the monitoring control device corresponding to the plant equipment to operate in real time based on the sensor measurement values; and

and a device state monitoring device that receives 1 st monitoring data including the sensor measurement value and the operation value from the monitoring device and the central control device, analyzes the operation state of the 1 st plant device for a predetermined period, and determines an optimum operation value of the 1 st plant device based on a result of analyzing the operation state of the 1 st plant device.

2. The plant equipment monitoring control system of claim 1,

the equipment state monitoring device analyzes the operation state of the 1 st plant equipment based on the 2 nd monitoring data for the predetermined period generated by processing the 1 st monitoring data received from the monitoring device and the central control device.

3. The plant equipment monitoring control system of claim 2,

in the 2 nd monitoring data, the equalized sensor measurement value, environmental data that systematically affects the sensor measurement value, disturbance data that temporarily affects the sensor measurement value, and an operation value of the 1 st plant equipment are stored in association with a time axis.

4. The plant equipment monitor control system of claim 3,

the device state monitoring apparatus filters the 2 nd monitoring data based on a time width, the environmental data, the external disturbance data, and an operation value of the 1 st plant device, and analyzes an operation state of the 1 st plant device.

5. The plant equipment monitor control system of claim 3,

the device state monitoring apparatus creates a 2-axis graph by using the two pieces of data included in the 2 nd monitoring data as axes.

6. The plant equipment monitoring and control system according to any one of claims 3 to 5,

the 1 st plant equipment is an electric dust collector of a thermal power plant,

the monitored operation value of the electrostatic precipitator includes at least one of a soot cleaning operation of the electrostatic precipitator, a method of charging an electrode of the electrostatic precipitator, and a power consumption of a charging device that applies a voltage to the electrode.

7. The plant equipment monitoring and control system according to any one of claims 3 to 5,

the 1 st plant equipment is an electric dust collector of a thermal power plant,

the environmental data includes the type of coal used in the boiler of the thermal power plant and the boiler load of the boiler,

the external disturbance data includes implementation of cleaning of dust upstream of the electric dust collector.

8. The plant equipment monitoring control system of claim 1,

the plurality of sensors provided in the 1 st plant includes sensors whose sensor measurement values are received by a 1 st supervisory control device provided in correspondence with the 1 st plant and are not collected in the supervisory device,

the equipment state monitoring device receives the sensor measurement value received by the 1 st supervisory control device, and analyzes the operation state of the 1 st plant equipment based on the sensor measurement value received by the 1 st supervisory control device and the 2 nd supervisory data generated by processing the 1 st supervisory data within the predetermined period.

9. A plant monitoring and control method for controlling a plurality of plants including a 1 st plant by providing a plurality of sensors in the plants and controlling the plants based on sensor measurement values from the sensors,

a monitoring device aggregates the sensor measurements from the plurality of sensors,

a central control unit continuously monitors the sensor measurement values collected by the monitoring unit, and a monitoring control unit for the plant apparatus indicates an operation value in real time based on the sensor measurement values,

the device state monitoring apparatus analyzes the operation state of the 1 st plant device for a predetermined period based on the 1 st monitoring data including the sensor measurement value and the operation value, and determines the optimum operation value of the 1 st plant device based on the analysis result of the operation state of the 1 st plant device.

10. The plant equipment monitoring control method according to claim 9,

the equipment state monitoring device analyzes the operation state of the 1 st plant equipment based on the 2 nd monitoring data within the predetermined period generated by processing the 1 st monitoring data.

11. The plant equipment monitoring control method according to claim 10,

in the 2 nd monitoring data, the equalized sensor measurement value, environmental data that systematically affects the sensor measurement value, disturbance data that temporarily affects the sensor measurement value, and an operation value of the 1 st plant equipment are stored in association with a time axis.

12. The plant equipment monitoring control method according to claim 11,

the device state monitoring apparatus filters the 2 nd monitoring data based on a time width, the environmental data, the external disturbance data, and an operation value of the 1 st plant device, and analyzes an operation state of the 1 st plant device.

13. The plant equipment monitoring control method according to claim 11,

the device state monitoring apparatus creates a 2-axis graph by using the two pieces of data included in the 2 nd monitoring data as axes.

14. The plant monitoring and control method according to any one of claims 11 to 13,

the 1 st plant equipment is an electric dust collector of a thermal power plant,

the monitored operation value of the electrostatic precipitator includes at least one of a soot cleaning operation of the electrostatic precipitator, a method of charging an electrode of the electrostatic precipitator, and a power consumption of a charging device that applies a voltage to the electrode.

15. The plant monitoring and control method according to any one of claims 11 to 13,

the 1 st plant equipment is an electric dust collector of a thermal power plant,

the environmental data includes the type of coal used in the boiler of the thermal power plant and the boiler load of the boiler,

the external disturbance data includes implementation of cleaning of dust upstream of the electric dust collector.

Technical Field

The present invention relates to a plant monitoring and control system and a plant monitoring and control method for monitoring and controlling plant equipment. In particular, the present invention relates to monitoring of an electric dust collector for treating soot contained in exhaust gas from a plant.

Background

For example, in a plant such as a thermal power plant or an iron works, the operating conditions of each equipment (referred to as "plant equipment") installed in the plant are monitored in a central operation room installed on the site. Since each plant equipment is disposed in a wide area, measurement values from sensors provided in each equipment are collected in a central control room, and an operator in the central control room grasps the operation state of each equipment based on these measurement values and performs necessary control. These measured values include data related to the operating conditions of the plant (for example, the input amount, the power generation amount, the production amount, and the like of fuel, material, and the like), operation parameters of each facility (current values, voltage values, and the like supplied to each facility), and data such as the concentrations of controlled substances contained in exhaust gas, waste water, waste, and the like.

With the worldwide increase in environmental awareness, various environmental restrictions are imposed on exhaust gas, waste water, waste materials, and the like discharged from factories in various countries and regions. Therefore, an environmental protection system for removing regulated substances contained in exhaust gas, waste water, waste, and the like to a predetermined value or less is installed in a factory. One of such environmental protection apparatuses is an electric dust collector. The electric dust collector is a device for collecting soot contained in exhaust gas. As a known technique for optimizing an electrostatic precipitator, there is patent document 1. Patent document 1 discloses that, in a moving electrode type electrostatic precipitator, as the moving speed of a dust collecting electrode plate increases, accumulation of dust can be suppressed, and on the other hand, as the moving speed increases, constituent members wear out significantly and the life of the dust collecting electrode plate becomes short, so that the charging state of a discharge electrode and the dust collecting electrode plate is determined for each cycle of the dust collecting electrode plate, and the moving speed of the dust collecting electrode plate is adjusted according to the charging state.

On the other hand, in patent document 2, the performance characteristics of the equipment are analyzed by continuously remotely monitoring the measurement values from the sensors provided in the equipment, and compared with the targeted performance characteristics. This makes it possible to grasp the deterioration of the performance of the device as early as possible.

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2000-140689

Patent document 2: U.S. Pat. No. 8738326

Disclosure of Invention

Problems to be solved by the invention

In a central operation room of a plant, a huge amount of data is collected from sensors installed in each plant. On the other hand, in a factory where labor saving is advanced, it is difficult to use up a large set of data because a small number of operators in a central operation room need to control the entire factory. For example, in the case of a thermal power plant, since the amount of power generation is controlled according to the power demand while complying with environmental restrictions, it is necessary to monitor the amount of fuel or the like input to a plant such as a boiler or a turbine (these are referred to as a "main unit"), the amount of power generation, the amount of a controlled substance in exhaust gas, waste water, or the like discharged from an environmental protection device, or the like, and perform necessary control in real time according to a target value or a controlled value. On the other hand, as described in patent document 1, control such as optimization of the operation of an auxiliary machine (referred to as a plant device other than the main machine) which has no direct relation with the target value or the controlled value during the operation of the plant is not performed in a central control room which manages the operation of the entire plant. Therefore, the set value set when the auxiliary unit is mounted is used as it is, and the operation state of the auxiliary unit is checked only in a case of a periodic check performed on a year-by-year basis in nature. In this case, the operation of the auxiliary machine may be continued in a state where the efficiency is decreased over a long period of time.

Patent document 1 is a technique for performing optimum control of a moving electrode based on charging characteristics, but there are many factors that affect the performance of an electrostatic precipitator, and it is necessary to grasp past operation tendencies and the like rather than to optimize some of the constituent elements, thereby optimizing the entire apparatus. Further, patent document 2 does not disclose that the knowledge from the sensor measurement value and the like is reflected in the daily operation of the plant for the purpose of early detection of abnormality of the plant.

Means for solving the problems

A plant monitoring and control system according to an embodiment of the present invention includes: a plurality of plant devices including a 1 st plant device; a plurality of monitoring control devices provided corresponding to the plurality of plant devices, respectively; a plurality of sensors provided in a plurality of plant equipments; a monitoring device that collects sensor measurement values from a plurality of sensors of a plurality of plant devices; a central control device for continuously monitoring the sensor measurement values collected by the monitored devices and indicating the operation values in real time to the monitoring control device corresponding to the plant equipment according to the sensor measurement values; and a device state monitoring device which receives the 1 st monitoring data including the sensor measurement value and the operation value from the monitoring device and the central control device, analyzes the operation state of the 1 st plant device within a predetermined period, and determines the optimal operation value of the 1 st plant device according to the analysis result of the operation state of the 1 st plant device.

Other objects and novel features will become apparent from the description of the specification and the drawings.

Effects of the invention

The optimum value of the set value of the operation value of the plant equipment, particularly the auxiliary equipment, is determined without increasing the load of the central operation room, thereby realizing the soundness of the plant equipment, the reduction of the operation cost, and the like, and realizing the optimum operation guide of the daily operation.

Drawings

Fig. 1 shows an example of the configuration of an environmental protection system for a thermal power plant.

Fig. 2A is a schematic configuration diagram of the electric dust collector.

Fig. 2B is a diagram illustrating the principle of the electric dust collector.

Fig. 3 is a configuration example of a plant monitoring and control system.

Fig. 4 is a diagram illustrating a relationship between a sensor measurement value used in the monitoring apparatus and a sensor measurement value used in the device state monitoring apparatus.

Fig. 5 shows an example of the structure of the device state monitoring apparatus.

Fig. 6 is an example of monitoring data used in the device state monitoring apparatus.

Fig. 7 is an example of a 2-axis graph generated by the data processing unit.

Fig. 8 is an example of a 2-axis graph generated by the data processing unit.

Fig. 9 is an example of a 2-axis graph generated by the data processing unit.

Fig. 10 is an example of a 2-axis graph generated by the data processing unit.

Fig. 11 shows another example of the structure of the plant monitoring and control system.

Detailed Description

Fig. 1 shows a configuration example of an environmental protection system of a thermal power plant as an example of a plant. 100 is a device group corresponding to a host. The turbine 102 is rotated by the steam generated by the boiler 101, and electric power is generated by rotating the generator 103. The steam for rotating the turbine 102 is returned to water by being introduced into the condenser 104, and is supplied again to the boiler 101. The boiler 101 converts water into steam using fossil fuel, and thus exhaust gas discharged from the boiler 101 contains various controlled substances. To remove this, an environmental protection device 110 is provided. Typical examples of the environmental protection system 110 include a denitration system 111, an electric dust collector 113, and a desulfurization system 114. The denitration device 111 is for reducing Nitrogen Oxides (NO) contained in the exhaust gas_x) Such as the blowing of ammonia (NH) into the exhaust gas₃) By reacting NO on a catalyst_xSelective catalytic reduction denitration technology for decomposing nitrogen and water, and the like. The electrostatic precipitator 113 is a device for reducing soot particles contained in the exhaust gas, and will be described later. The desulfurizer 114 is for reducing Sulfur Oxides (SO) contained in the exhaust gas_x) For example, there is known an apparatus for bringing exhaust gas into gas-liquid contact with limestone slurry to cause calcium (Ca) and sulfurous acid gas (SO) to be in contact with each other₂) React to thereby absorb SO₂And a wet lime gypsum method in which gypsum is recovered as a by-product.

Fig. 2A is a schematic configuration diagram of the electrostatic precipitator 113. In the example of fig. 2A, two flues 201, 202 are provided, and the exhaust gas introduced from each flue captures soot contained in the exhaust gas while passing through the apparatus. The exhaust gas passes through the three dust collecting sections 203 to 205 while passing through the electric dust collector 113. Dust collecting electrodes (see fig. 2B described later) for allowing the dust to adhere to the dust collecting sections are disposed in the respective dust collecting sections. The soot attached to and accumulated on the dust collecting electrode is separated and collected in the hopper 206. The electrostatic precipitator 113 is designed according to the required dust collection performance, and the number of flues and the number of dust collection sections are determined according to this, and are not limited to specific numbers.

The principle of the electric dust collector will be described with reference to fig. 2B. A plurality of pairs of discharge electrodes 211 and dust collecting electrodes 212 shown in fig. 2B are arranged in each dust collecting section, and the exhaust gas passes through the pairs. When the electric dust collector is operated, a high voltage is applied between the discharge electrode 211 and the dust collecting electrode 212, thereby generating corona discharge. Thereby generating ions 213. The soot contained in the exhaust gas is charged by the ions 213, attracted to the dust collecting electrode 212 facing the discharge electrode by electrostatic attraction, and deposited, whereby the soot contained in the exhaust gas is reduced. Since the dust collection performance is lowered when the dust continues to be accumulated on the dust collecting electrode 212, the accumulated dust needs to be separated from the dust collecting electrode 212. Therefore, a moving electrode type device is known as follows: a fixed electrode type device for applying vibration by hammering the dust collecting electrode 212 to peel off the accumulated soot; or a movable electrode type device in which the dust collecting electrode 212 is movably configured and the dust accumulated by moving the dust collecting electrode is swept by a brush. Any one or both of the above-described embodiments can be applied to the electrostatic precipitator 113.