JP7304177B2 - WATER FACILITY STATUS MONITORING SYSTEM AND WATER FACILITY STATUS MONITORING METHOD - Google Patents

Description

The present invention relates to a condition monitoring system for water supply facilities and a condition monitoring method for water supply facilities.

For example, in the water supply business, river water, groundwater, or the like is used as raw water, and clean water is finally supplied to consumers through pipes after being subjected to water purification treatment and disinfection treatment. In countries around the world, water is disinfected by various means such as chemicals such as chlorine, ozone, and ultraviolet rays. In Japan, chlorine and sodium hypochlorite are used as disinfectants for disinfection. In water utilities, etc., after water treatment or raw water, a disinfectant is injected directly from a disinfection facility, and the concentration of residual chlorine at water taps is managed so that it satisfies the law.

In recent years, Japan has entered a society with a declining population, and the demand for water is on the decline due to the prolonged economic stagnation, the spread of water-saving water-using equipment, and changes in lifestyle. Moreover, since many of the water supply facilities were built during the high-growth period, there is a tendency for the number of facilities to be renewed recently to increase. On the other hand, as the population declines, the financial situation of water supply utilities tends to be tight, and depending on the financial situation, it is conceivable that the water supply facilities will continue to be used. Under such circumstances, it is expected that the risk of deterioration in the quality of water supply services will increase due to an increase in problems with water supply facilities and a decrease in know-how.

Furthermore, it is expected that the maintenance and management of water supply and sewerage projects will expand over a wider area in the future. Therefore, in order to maintain and manage a plurality of facilities more efficiently while maintaining the service level, further cost reduction is desired.

In general, the disinfection equipment of water utilities is monitored by workers making rounds of the disinfection equipment. In patrol inspections, in addition to visually reading the indicated values of the electrical equipment installed in the disinfection equipment and the gauges attached to the disinfectant injection equipment, workers check the situation with their five senses. Of the five senses, the sense of smell is particularly important in determining deterioration of disinfection equipment and leakage of disinfectant.

In Patent Document 1, a measurement unit that measures the operating state of each facility placed in a plant and outputs measurement information representing the measurement result, and the operating state of the facility represented by the measurement information are determined in advance. Diagnosis is made according to a first diagnosis rule, the result of the diagnosis is further diagnosed according to a predetermined second diagnosis rule, and the result of diagnosis according to the second diagnosis rule is used as the result of diagnosing the operating state of the facility. A field device is disclosed that includes a diagnostic unit that outputs representative diagnostic result information.

JP 2018-139152 A

As described above, monitoring of disinfection equipment in general water supply facilities was based on round inspections by workers. Therefore, it is necessary to reduce labor costs, which account for a large proportion of the maintenance costs of water supply facilities.

The present invention has been made in view of the above problems, and is capable of reducing maintenance and management costs by reducing manpower for monitoring the disinfection equipment of water supply facilities. An object of the present invention is to provide a state monitoring method.

In order to solve the above problems, a condition monitoring system for water supply facilities according to one aspect of the present invention includes a sensor for detecting the concentration of a specific substance in the atmosphere within a disinfection facility provided in the water supply facility, and the concentration detected by the sensor. and a malfunction determination device that determines whether or not there is a malfunction in the disinfection equipment based on the operation data of the disinfection equipment.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to aim at reduction of maintenance management cost by aiming at manpower saving of the monitoring of the disinfection equipment of a water supply facility.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the condition-monitoring system of the water supply facility which is embodiment. It is a flow chart for explaining the operation of the condition monitoring system for water supply facilities of the embodiment. FIG. 5 is a diagram showing the relationship between operating data and density change patterns;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the embodiments described below do not limit the invention according to the scope of claims, and that all of the elements described in the embodiments and their combinations are essential to the solution of the invention. is not limited.

A water supply facility condition monitoring system (hereinafter simply referred to as a "condition monitoring system"), which is an embodiment of the present invention, is a system that monitors whether a water supply facility is being operated based on, for example, the management criteria shown below. . The items of management standards monitored by the condition monitoring system include, for example, turbidity and pH at the receiving well, upper and lower limits of the injection rate of the coagulant, turbidity of the sedimentation treatment water, turbidity and residual chlorine at the outlet of the filter basin concentration, residual chlorine concentration and pH at the clean water reservoir outlet.

Here, in the present specification, the term "water supply facility" refers to, for example, a water supply facility that treats water to be treated that is taken from a water source such as a river into drinking water; It includes seawater desalination equipment, reclaimed water production equipment, etc., and sewage equipment for treating water to be treated such as domestic wastewater or industrial wastewater.

FIG. 1 is a schematic configuration diagram showing a condition monitoring system for water supply facilities, which is an embodiment. As shown in FIG. 1 , a condition monitoring system 1 according to the embodiment has a water supply facility 2 and a condition monitoring unit (monitoring device) 7 .

The water supply facility 2 has a water intake facility 3 , a water treatment facility 4 and a distribution reservoir 5 . The water purification facility 4 includes a receiving well 10 for receiving raw water, a mixing pond 11 for adding a flocculating agent and rapidly stirring, a floc forming pond 12 for slowly stirring to grow flocs, and sedimentation for sedimentation and separation of the grown flocs by gravity settling. It has a pond 13, a filter pond 14, and a purified water pond 15 for storing purified water.

In this embodiment, although not shown, the water purification facility 4 is provided with a flow meter and a water quality meter for measuring the treatment flow rate and water quality in order to monitor the state of the water supply facility 2 by the state monitoring unit 7 . A flow meter is installed in the receiving well 10 to measure the amount of water (flow rate) to be treated. The water quality meter measures water temperature, pH sensor, amount of organic matter, chlorine consumption, free residual chlorine, combined residual chlorine, and the like. Water quality meters are installed at the receiving well 10 , the outlet of the sedimentation basin 13 , the outlet of the filtration basin 14 and the clean water basin 15 . Measurement information of the flow meter and the water quality meter is transmitted to the state monitoring unit 7 via a communication network (not shown). The output from the state monitoring unit 7 is similarly transmitted to each facility device of the water supply facility 2 via the communication network, and the water intake amount and chemical feeding amount are controlled.

The water supply facility 2 has a disinfection facility 16 . The disinfection facility 16 injects a disinfectant into the purified water stored in the purified water pond 15 and disinfects the water with chlorine. The disinfection facility 16 has a disinfectant injection facility 17 that injects a disinfectant into the purified water reservoir 15 and a disinfectant storage facility 18 that stores the disinfectant. These disinfectant injection equipment 17 and disinfectant storage equipment 18 are installed in the building 19 of the disinfection equipment 16 .

In addition, the disinfection equipment 16 has an air conditioning equipment 20 for air conditioning inside the building 19 . The air conditioner 20 has an air intake duct 20a that draws in the air inside the building 19 and an air supply duct 20b that supplies air that has been conditioned into the building 19 . This air conditioning facility 20 is for controlling the temperature of the disinfectant in the disinfecting facility 16 .

An odor sensor 21 is provided in the intake duct 20 a of the air conditioner 20 . The odor sensor 21 detects the concentration of chlorine produced as a result of injecting sodium hypochlorite, which is a disinfectant, into water. The odor sensor 21 is provided in the intake duct 20 a to detect the chlorine concentration in the air (atmosphere) inside the building 19 of the disinfection equipment 16 .

The state monitoring unit (monitoring device) 7 is composed of an information processing device such as a computer, for example. As already explained, the state monitoring unit 7 receives measurement information from flowmeters and water quality meters, and monitors whether the water supply facility 2 is being operated based on predetermined management standards. In addition, the state monitoring unit 7 collects the operating conditions of each equipment of the water supply facility 2 including the disinfection equipment 16 and generates the operation data of these equipment. Furthermore, the state monitoring unit 7 controls the amount of water intake and the amount of chemical injection by each facility equipment of the water supply facility 2 based on the monitoring result.

The state monitoring unit 7 has a malfunction diagnosis unit (malfunction determination device) 30 that determines whether or not the disinfection equipment 16 has a malfunction. The defect diagnosis unit 30 includes a control unit 31 having an arithmetic element such as a CPU (Central Processing Unit), a storage unit 32 having a storage medium such as a flash memory device or a hard disk drive (HDD), and an odor sensor 21. An input/output I/O (interface) device that receives measurement data of the chlorine concentration output and operation data of the disinfection equipment 16 that is output from the state monitoring unit 7, and a fault diagnosis unit 30 detects that there is a problem with the disinfection equipment 16. It also has a notification unit (notification device) 33 for notifying the result of the determination once it has been determined.

When the state monitoring unit 7 is powered on, the control unit 31 reads out and executes a program such as firmware stored in the storage unit 32, thereby executing various operations for determining whether or not the disinfection equipment 16 is faulty. Together with this, it realizes the function of each functional means to be described later.

The control unit 31 has a concentration acquisition unit 34 , an operation data acquisition unit 35 and a malfunction determination unit 36 .

The concentration acquisition unit 34 periodically or continuously acquires chlorine concentration measurement data received by the input/output I/O device and output from the odor sensor 21 , and stores the acquired measurement data in the storage unit 32 . The operation data acquisition unit 35 periodically acquires the operation data of the disinfection equipment 16 output from the state monitoring unit 7 received by the input/output I/O device, and stores the acquired operation data in the storage unit 32 .

The defect determination unit 36 determines whether there is a defect in the disinfection equipment 16 based on the chlorine concentration measurement data acquired by the concentration acquisition unit 34 and the operation data of the disinfection equipment 16 acquired by the operation data acquisition unit 35 . The malfunction of the disinfection equipment 16 here means, for example, deterioration of the disinfection equipment 16, improper installation, and leakage of chlorine. Chlorine may leak from the disinfectant injection equipment 17 when the sealing portion of the disinfectant equipment 16 , for example, the disinfectant injection equipment 17 deteriorates. Chlorine may also leak into the building 19 of the disinfecting equipment 16 due to other causes, for example, operator error.

Here, the defect determination unit 36 determines whether or not there is a defect in the disinfection equipment 16 based on a preset chlorine concentration threshold. In addition, the defect determination unit 36 generates a chlorine concentration change pattern based on the operation data of the disinfection equipment 16 acquired from the state monitoring unit 7, and compares the chlorine concentration detected by the odor sensor 21 with this concentration change pattern. Based on this, it is determined whether or not there is a problem with the disinfection equipment 16 . At this time, the defect determination unit 36 stores the generated density change pattern in the storage unit 32 .

If the chlorine concentration of the air in the building 19 of the disinfection equipment 16 is equal to or above the threshold value, or exceeds the threshold value, it can be determined that the disinfection equipment 16 has malfunctioned. On the other hand, even if the chlorine concentration of the air in the building 19 does not reach the threshold, for example, if the disinfection equipment 16 is operated, the chlorine concentration will gradually increase, and it is expected that the threshold may be exceeded if this situation continues. If so, it can be determined that the disinfection equipment 16 has failed. Naturally, if the chlorine concentration is decreasing when the disinfection equipment 16 is not in operation and it is expected that the possibility of exceeding the threshold value is low even if the chlorine concentration is repeatedly increased and decreased, there is a problem with the disinfection equipment 16. It is also possible to determine that it has not occurred.

Therefore, the defect determination unit 36 determines whether or not there is a defect in the disinfection equipment 16 based on the chlorine concentration detected by the odor sensor 21 and this concentration change pattern, so that the defect in the disinfection equipment 16 can be detected more reliably and early. can be found in

Naturally, the magnitude relationship between the chlorine concentration threshold value and the chlorine concentration change pattern is arbitrary, and it is not necessary for either to be larger. The details of the determination operation of the defect determination unit 36 based on the operating data or density change pattern will be described later.

The notification unit 33 notifies the malfunction of the disinfection equipment 16 determined by the malfunction determination unit 36 as a warning. The notification unit 33 can employ known means such as a buzzer, a siren, a warning light, etc., as long as they can notify the operator of a problem through the five senses.

Next, the operation of the condition monitoring system 1 of this embodiment will be described with reference to the flowchart of FIG. 2 and FIG.

FIG. 2 is a flow chart for explaining the operation of the condition monitoring system 1 of this embodiment. The operation shown in the flowchart of FIG. 2 is started when the state monitoring unit 7 is powered on, or is started periodically at predetermined time intervals.

First, the operating data acquiring unit 35 acquires operating data of the disinfection equipment 16 from the state monitoring unit 7 (step S1). Then, the malfunction determination unit 36 generates a chlorine concentration change pattern based on the operation data of the disinfection equipment 16 acquired in step S1 (step S2).

Next, the concentration acquisition unit 34 acquires chlorine concentration measurement data from the odor sensor 21 (step S3). Then, the defect determination unit 36 determines whether or not the value of the chlorine concentration measurement data acquired in step S3 exceeds a predetermined chlorine concentration threshold (step S4). Then, if it is determined that the value of the measurement data of the chlorine concentration exceeds the threshold value (YES in step S4), the notification unit 33 warns of the malfunction of the disinfection equipment 16 (step S6).

On the other hand, if it is determined that the value of the chlorine concentration measurement data is equal to or less than the threshold value (NO in step S4), then the defect determination unit 36 determines the chlorine concentration change pattern generated in step S2 and the chlorine concentration measurement data. It is determined whether or not the change in the chlorine concentration measurement data value is abnormal by comparing with the concentration change pattern (step S5). Then, if it is determined that the change in the chlorine concentration measurement data is abnormal (YES in step S5), the notification unit 33 warns of the malfunction of the disinfection equipment 16 (step S6). On the other hand, if it is determined that there is no abnormality in the change in the chlorine concentration measurement data (NO in step S5), the process returns to step S3.

An example of the determination procedure of the defect determination unit 36 in step S5 will be described with reference to FIG.

FIG. 3 is a diagram showing the relationship between operating data and density change patterns. Here, the horizontal axis in FIG. 3 is the time axis. In FIG. 3 , a solid line B in (a) indicates the value of chlorine concentration measurement data obtained by the concentration obtaining unit 34 , and a broken line D<b>1 indicates the concentration change pattern created by the defect determination unit 36 . Another dashed line D2 indicates the chlorine concentration threshold.

Moreover, FIG. 3(b) shows the operation data of the disinfection equipment 16. As shown in FIG. Specifically, FIG. 3(b) shows operation data of the disinfectant injection equipment 17 of the disinfection equipment 16, and section A1 is a state in which the disinfectant injection equipment 17 is in operation and the disinfectant is being injected into the clean water reservoir 15. , and section A2 indicates a state in which the operation of the disinfectant injection facility 17 is interrupted and the disinfectant is not injected into the clean water pond 15 . FIG. 3(b) shows instantaneous values, and if the time is long, the disinfectant injection equipment 17 can be considered to be in continuous operation.

If the disinfectant injection facility 17 is in operation, the value of the chlorine concentration measurement data acquired by the concentration acquisition unit 34 increases, and if the operation of the disinfectant injection facility 17 is interrupted, the value of the chlorine concentration measurement data. is expected to decline. Accordingly, the defect determination unit 36 generates a density change pattern as indicated by the dashed line D1 in FIG. 3(a).

The defect determination unit 36 observes the change over time in the chlorine concentration measurement data value indicated by the solid line B, and determines that there is a defect in the disinfection equipment 16 when the value of the measurement data exceeds the concentration change pattern indicated by the dashed line D1. You may In addition, the defect determination unit 36 calculates the slope of the time change of the measured data value of the chlorine concentration, and the slope exceeds a predetermined positive value (that is, the rate of increase of the measured data value is a predetermined value or more). At times, it may be determined that the disinfection facility 16 is defective. Furthermore, the malfunction determination unit 36 pays attention to the increase rate of the chlorine concentration measurement data when the disinfectant injection equipment 17 is operated, and if this increase rate exceeds the increase rate of the concentration change pattern, the disinfection equipment 16 is malfunctioning. It may be determined that there is In addition, if there is a period in which the disinfectant injection facility 17 does not operate for a while, the defect determination unit 36 can predict that the value of the measurement data will not exceed the threshold value (broken line D2) until that period. Once determined, it may be determined that there is no problem with the disinfection equipment 16 .

In any case, the defect determination unit 36 can determine whether there is a defect in the disinfection equipment 16 before the value of the chlorine concentration measurement data (solid line B) exceeds the threshold value (dashed line D2), and preventive management can be performed. It is possible and preferable.

According to this embodiment configured in this way, the odor sensor 21 detects the concentration of the specific substance in the atmosphere inside the disinfection equipment 16 provided in the water supply facility 2, and the defect determination unit 36 detects the Based on the concentration obtained and the operation data of the disinfection equipment 16, it is determined whether or not the disinfection equipment 16 is faulty.

Therefore, according to this embodiment, it is possible to reduce the maintenance and management cost by reducing the manpower required for monitoring the disinfection equipment of the water supply facility.

In particular, in the state monitoring system 1 of the present embodiment, the malfunction of the disinfection facility 16 is determined based on both the chlorine concentration threshold and the chlorine concentration change pattern. In the water supply facility 2, the disinfectant can be intermittently or continuously injected into the clean water pond 15 and/or pipes. If the disinfectant is supplied only continuously, the malfunction of the disinfection equipment 16 can be accurately determined only by the chlorine concentration threshold. On the other hand, when the disinfectant is intermittently introduced, even if the chlorine concentration in the building 19 of the disinfection equipment 16 rises temporarily, the chlorine concentration will increase if the operation of the disinfection equipment 16 is interrupted after that. Since it descends, it may not be necessary to determine that the disinfection equipment 16 has malfunctioned. In the state monitoring system 1 of this embodiment, since the malfunction of the disinfection equipment 16 is determined based on the operation data of the disinfection equipment 16, more accurate determination can be made.

In addition, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. In addition, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

As an example, in the above-described embodiment, the concentration of chlorine, which is a disinfectant, is detected by the odor sensor 21 to determine the malfunction of the disinfection equipment 16, but the substance detected by the odor sensor 21 is not limited to chlorine, and the disinfection equipment If it is a volatile substance that can determine the malfunction of the disinfection equipment 16, it is possible to determine the malfunction of the disinfection equipment 16 by providing an odor or gas sensor or the like corresponding thereto.

For example, the disinfection equipment 16 is often provided with electrical equipment (power receiving panel, operation panel) for operating the disinfectant injection equipment 17 . Electrolytic capacitors are often provided in electrical equipment, and these electrolytic capacitors may leak or volatilize electrolyte due to aging, etc., causing problems in the electrical equipment itself.

Therefore, an odor sensor for detecting the concentration of glycerin and γ-butyrolactone used in the electrolytic solution in the building 19 of the disinfection equipment 16 is provided in the building 19, and the electrical equipment of the disinfection equipment 16 is measured based on the measurement data of this odor sensor. It may be determined whether or not there is a defect in In addition, a forced exhaust facility may be provided in the electrical equipment, an exhaust duct of this forced exhaust facility may be connected to the air conditioner 20, and an odor sensor may be provided in the exhaust duct. In this case, the odor sensor 21 described above can be installed side by side.

Furthermore, instead of the odor sensor 21, or in addition to the odor sensor 21, a smoke sensor that detects smoke in the building 19 of the disinfection equipment 16 is provided to determine the presence or absence of defects caused by smoke emitted from various equipment in the disinfection equipment 16. You may

Furthermore, when a plurality of disinfection facilities 16 are provided in the water supply facility 2, the disinfection facilities 16 provided with the odor sensors 21 may be changed according to the target of the patrol inspection and the schedule. As a result, malfunctions of many disinfection facilities 16 can be determined with fewer odor sensors 21 . Alternatively, each disinfection equipment 16 may be provided with an odor sensor 21 and the determination operation by the defect diagnosis unit 30 may be switched on a time basis. As a result, it is possible to perform an efficient fault determination when the operation time of each disinfection equipment 16 is different.

Then, a movable or wide-angle monitoring camera that can monitor the inside of the building 19 is installed in the disinfection equipment 16, and the equipment and equipment that are actually malfunctioning for the disinfection equipment 16 that has been determined to be defective by the defect diagnosis unit 30 can be specified. In addition, by providing workers with information on malfunctioning devices prior to patrol inspections, the time required for workers to respond to malfunctions can be shortened, and the number of patrol inspections themselves can be reduced. can also

Further, each of the above configurations, functions, processing units, processing means, and the like may be realized by hardware, for example, by designing them in an integrated circuit. Moreover, each of the above configurations, functions, etc. may be realized by software by a processor interpreting and executing a program for realizing each function. Information such as programs, tables, and files that implement each function can be stored in a recording device such as a memory, a hard disk, or an SSD, or a recording medium such as an IC card, an SD card, or a DVD.

Further, the control lines and information lines indicate those considered necessary for explanation, and not all control lines and information lines are necessarily indicated on the product. In practice, it may be considered that almost all configurations are interconnected.

REFERENCE SIGNS LIST 1 Condition monitoring system 2 Water supply facility 7 Condition monitoring unit (monitoring device) 15 Purified water reservoir 16 Disinfection equipment 17 Disinfectant injection equipment 18 Disinfectant storage equipment 19 Building 20 Air conditioning equipment 20a Intake duct 21 ... Odor sensor (sensor) 30 ... Malfunction diagnosis unit (malfunction determination device) 33 ... Notification unit (report device) 34 ... Concentration acquisition unit 35 ... Operation data acquisition unit 36 ... Malfunction determination unit

Claims (6)

A monitoring device that collects operating conditions of disinfection equipment installed in water supply facilities and generates operating data;
a sensor that detects the concentration of a specific substance in the atmosphere within the disinfection facility;
receiving the operation data from the monitoring device , generating a concentration change pattern of the specific substance based on the operation data, and comparing the generated concentration change pattern with the concentration change detected by the sensor; A condition monitoring system for a water supply facility, comprising: a failure determination device that determines that the disinfection equipment has a failure when there is an abnormality . 2. The condition monitoring system according to claim 1, wherein said specific substance is a disinfectant or a substance generated by injecting said disinfectant into water. 2. The condition monitoring system according to claim 1 , wherein the malfunction determination device also determines based on a preset threshold value of the concentration of the specific substance. Having air conditioning equipment provided in the disinfection equipment,
2. The condition monitoring system according to claim 1, wherein said sensor is provided in an intake duct of said air conditioner. 2. The condition monitoring system according to claim 1, further comprising a notification device for notifying the result of determination by said defect determination device when said defect determination device determines that said disinfection equipment has a defect. A state executed by a state monitoring system having a monitoring device that collects operating conditions of a disinfection facility installed in a water supply facility and generates operating data, and a sensor that detects the concentration of a specific substance in the atmosphere within the disinfection facility. A monitoring method comprising:
receiving the operation data from the monitoring device , generating a concentration change pattern of the specific substance based on the operation data, and comparing the generated concentration change pattern with the concentration change detected by the sensor; A method for monitoring the condition of a water supply facility, characterized by determining that the disinfection equipment has a problem if there is an abnormality .

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