JP3235585U - Maintenance and inspection system for septic tank blowers, pumps and water quality sensors - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a maintenance and inspection system for a septic tank blower, a pump and a water quality sensor, which minimizes the operation of going to the site and efficiently promotes maintenance work. SOLUTION: A maintenance and inspection system for a septic tank blower, a pump, and a water quality sensor arranges a current detector in equipment such as a blower 9 and a pump 10, and detects a change in a current value, an energization frequency, a start count, and the like. It is possible for a maintenance / inspector to go to the site to check the presence or absence of an abnormality in each device while keeping the septic tank in operation without stopping and pulling up the devices such as the blower 9 and the pump 10. In addition, the water quality data collection system 15 equipped with various water quality sensors can grasp the water quality status from the water quality data of the raw water and the treated water, and the work of going to the site can be minimized. [Selection diagram] Fig. 2

Description

The present invention relates to a system for efficiently and effectively maintaining and inspecting equipment in order to facilitate the operation of multiple combined septic tanks for wastewater treatment in hotels and restaurants, and the blower installed in the combined septic tank. It relates to a method for easily and easily detecting and predicting the maintenance / inspection and replacement time of equipment such as pumps and water quality sensors without going to the site.

In the present invention, in the case where multiple facilities of the merged septic tank for wastewater treatment are used in hotels, restaurants, etc., various sensors can be used to determine the replacement timing of maintenance and inspection of the equipment such as blowers and pumps installed in the merged septic tank and the water quality sensor group. It provides a maintenance and inspection system for combined septic tank blowers, pumps, and water quality sensors that enables efficient maintenance work by minimizing the number of operations to go to multiple sites by accurately grasping with a personal computer or the like. Is.

Patent Registration No. 5171729 (filed on 21.5.13, Heisei) Patent Registration No. 4873931 (Application for 16.3.1) JP-A-2005-250557 (Application 21.5.18)

Document 2 provides a detachable connector on the cable that connects the water quality detection sensor installed in the septic tank and the communication terminal that communicates the detected information to the outside, and when the water quality inspector wants to check the water quality, the connector is used by the inspector. It is a document of water quality management system and water quality management method that can be confirmed by connecting to a water quality detector.

Document 3 analyzes the received detection data with a measurement unit composed of a terminal that processes the detection data of a sensor that detects water quality for mail transmission, a communication terminal, etc., and creates a database, and also collects water quality data and alarm information. It is a document of daily water quality management system by mobile technology that can send mail to client and receive command from client on the Internet.

Most of the above prior art is related to the method of processing, transmitting and managing the water quality data of the septic tank, and touches on the maintenance and inspection of each device and water quality sensor group used in the septic tank and the method of predicting the replacement time. Not. Therefore, it was common to visit the site regularly for maintenance and inspection, take out each device and water quality sensor group from the water, and inspect them. Therefore, there is a problem that it takes manpower and time to take out the blower, the pump and the water quality sensor group from the water and visually check them by visiting a plurality of sites where the merged septic tank facility is located on a regular basis.

In the combined septic tank equipment used for wastewater treatment of large residential equipment, the septic tank is composed of an inflow tank, an anaerobic filter bed tank, an aeration tank, a treatment water tank, and the like. The aeration tank is equipped with a blower for supplying air, the treated water tank is equipped with a pump for discharging the treated water, and various water quality sensors for detecting the water quality of the treated water. In the operation of such merged septic tank equipment, maintenance, inspection, and replacement work of equipment such as blowers and pumps and water quality sensors are performed by visiting the site on a regular basis, stopping the operation of the equipment, pulling up each equipment and sensor, and then visually observing. Confirmation work was done by inspection. Therefore, in the case of operating and managing a large number of merged septic tanks, there is a problem that it takes manpower and time to regularly go to the site where the merged septic tank equipment is located and visually check the state of the equipment.
The present invention was made to solve these problems, and with various sensors equipped with equipment such as pumps and blowers installed in the merged septic tank and maintenance / inspection and replacement time of the water quality sensor group. The purpose is to minimize the number of operations to go to the site and efficiently proceed with maintenance work by accurately grasping it with a personal computer or the like.

The present invention has been made to solve the problems of the prior art, and by detecting a change in the current value by attaching a CT coil to an electric wire that supplies power to a drive motor of a device such as a blower and a pump. It is possible to grasp the abnormality of the blower and the pump. For example, if the blades of a pump or blower are worn due to corrosion or the like, the current value will decrease, and if foreign matter is caught, the current value will increase. Therefore, by monitoring the drive current value of the pump or blower, it is possible to grasp the abnormality of the pump or blower without going to the site.
Further, the number of times the device is started can be detected by counting the ON / OFF frequency of the energization of the CT coil. Moreover, these detections can be performed in the operating state of the combined septic tank without stopping and pulling up equipment such as a blower and a pump at the site.

Further, in the present invention, the current value of the drive motor of equipment such as a blower and a pump is measured, for example, every hour, the record is kept, and the average value for one day is calculated and recorded. It is possible to observe this change in the average value, and if it changes by a certain value or more (for example, 10% or more) from the initial value (daily average value) at the start of equipment use, check for abnormalities. , Equipment such as blowers and pumps can be replaced if necessary.

Further, in the present invention, after detecting and recording the total operating time and the number of activations of devices such as blowers and pumps, the total operating time and the number of activations are 30%, 50%, and 70 of the life operation time and the number of activations guaranteed by the manufacturer. Every time it reaches% or the like, it is possible to check the presence or absence of an abnormality in equipment such as a blower and a pump with the above current value. If necessary, equipment such as blowers and pumps can be replaced. If the total operating time and number of start-ups reach the manufacturer's guaranteed life operation time and number of start-ups, in principle, equipment such as blowers and pumps will be replaced. Good to replace.

Further, in the present invention, the quality of the raw water flowing into the septic tank and the water quality of the treated water tank, which is the final stage of the septic tank, are measured, for example, every hour, and the record is kept and the average value for one day is calculated. Record in the data collection system. Observe this change in the average value, and if the quality of the raw water changes significantly by 30% or more as an example from the preset initial value at the start of equipment use, check with the hotel or restaurant about the reason for the change in the raw water, especially. If there is no reason for change, the water quality sensor in the inflow tank can be inspected to check for any abnormalities, and if necessary, the raw water quality sensor should be replaced.

Further, in the present invention, the water purification effect of the septic tank is calculated every hour from the difference between the measured values of the water quality of the inflow tank and the water quality of the treated water tank, and the record is kept and the average value for one day is calculated and recorded. Observe this change in the average value, and if it deteriorates by 30% or more as an example from the initially set target value, the water quality sensor of the treated water tank can be inspected, and if necessary, the water quality sensor of the treated water should be replaced. be able to.

The present invention has the following effects.
First, the conventional blower, pump, and other equipment were stopped and inspected regularly (for example, once every three months) to check the necessity of replacement, and if necessary, replacement work was performed. According to this, it can be substituted by checking the current values of equipment such as blowers and pumps on a personal computer on a regular basis, and there is an effect that the work of going to the site or stopping the operation of the equipment and pulling it up becomes the minimum necessary.
Secondly, since the operating time and the number of times of starting the equipment such as the blower and the pump can be recorded on the personal computer, there is an effect that the replacement time due to the life of the equipment can be easily grasped even when there is no abnormality.
Thirdly, the water quality sensors of the inflow tank and the treated water tank were regularly inspected (for example, once every three months) to check the necessity of replacement, and replacement work was performed if necessary. It can be substituted by checking the water quality data of the inflow tank and the treatment tank on a regular basis, and it has the effect of minimizing the work of going to the site or stopping the operation of the equipment and pulling up the sensor.
Fourth, by measuring the water quality of the inflow tank and the water quality of the treated water tank regularly, the water purification effect of the septic tank can be grasped. It has the effect of being able to easily grasp the necessity of repair.

It is a flow diagram showing an example of the configuration and treatment process of a merged septic tank that treats a large amount of domestic wastewater from hotels and restaurants. It is a figure which shows an example of the measurement / data collection system of a combined septic tank. It is a block diagram of the current value and ON / OFF frequency detection sensor of the drive motor of the blower and the pump of the merged septic tank. It is a figure which shows an example of the operation data of the blower of the merged septic tank. It is a figure which shows an example of the operation data of the pump of the combined septic tank. It is a flowchart which shows an example which detects and informs the maintenance / inspection time of the equipment such as a blower for a combined septic tank and a pump. It is a figure which shows an example of the change of the water quality data of the inflow tank and the treatment water tank of a merged septic tank. It is a figure which shows an example of the change of the difference between the water quality data of the raw water of the merged septic tank and the water quality data of the treated water. It is a system flow chart which shows an example of detecting and contacting the maintenance / inspection time of the water quality sensor group for a combined septic tank.

FIG. 1 is a diagram showing an example of a configuration and a treatment process of a combined septic tank for treating a large amount of domestic wastewater such as a hotel or a restaurant. 1 is an inflow tank that receives domestic wastewater, 2 is an anaerobic floor tank, 3 is an aeration tank, 4 is a treatment water tank that temporarily stores treated wastewater, and 5 is an inflow pipe that sends domestic wastewater to a septic tank. Is a discharge pipe for discharging treated water to a river or the sea, 7 and 8 are anaerobic filter beds installed in the inflow tank 1 and the anaerobic filter bed tank 2, and 9 is a blower for sending air to the aeration tank 3. 10 is a pump for discharging the treated water of the treated water tank 4 into a river or the sea, 11a is a raw water quality sensor installed in the inflow tank 1, and 11b is various water quality sensors for checking the water quality in the treated water tank 4. For example, a water temperature sensor, a pH sensor, a DO sensor, etc.). Here, pH is a hydrogen ion index and DO is dissolved oxygen. The COD value described later is a chemical oxygen demand, and the BOD value is a biochemical oxygen demand, which is a water quality index. For example, the larger the BOD value or COD value, the worse the water quality.

FIG. 2 shows an example of a data collection system in a septic tank. 12 is a septic tank system, 13 is a personal computer data collection system, and 14 is an operation data collection system, which collects operation data such as ON / OFF frequency and operation current of the blower 9 and the pump 10. Reference numeral 15 is various water quality data collection systems for checking the water quality of the inflow tank 1 and the treated water tank 4.

FIG. 3 is a configuration diagram showing a drive motor of the blower 9 and the pump 10 of the combined septic tank. 9a is a blower drive motor, 10a is a pump drive motor, 9b is a feeder drive line for the blower drive motor, 10b is a feed line for the pump drive motor, and 9c is a current detector and start frequency detector for the blower drive motor.
Reference numeral 10c indicates a current detector and a start frequency detector of the pump drive motor.

FIG. 4 is a characteristic diagram showing a change in the measured value of the operating current of the blower 9 of the combined septic tank. 16 is the operating current value of the blower 9, 17 is the upper limit of the operating current of the blower 9 (for example, + 10% of the initial value), and 18 is the same lower limit value (for example, -10% of the initial value). As shown in the figure, when the operating current value 16 of the blower 9 exceeds the upper limit value 17 or falls below the lower limit value 18, it is determined that the blower 9 has become or is in an abnormal state. Only in that case, it is sufficient to go to the site and inspect the blower 9.

FIG. 5 is a characteristic diagram showing a change state of the measured value of the operating current of the pump 10 of the combined septic tank. 19 indicates the operating current value of the pump 10, 20 indicates the upper limit value of the operating current of the pump 10 (for example, + 10% of the initial value), and 21 indicates the same lower limit value (for example, -10% of the initial value). As shown in the figure, when the operating current value 19 of the pump 10 exceeds the upper limit value 20 or falls below the lower limit value 21, it is determined that the pump 10 is in an abnormal state or is about to become. Only in that case, it is sufficient to go to the site and inspect the pump 10.

FIG. 6 is a flowchart showing an example of detecting and contacting the maintenance / inspection time of equipment such as a blower for a combined septic tank and a pump. First, after the initial setting, it is determined whether or not the values detected by the current detector 9c of the blower drive motor 9a and the current detector 10c of the pump drive motor 10a exceed the preset upper and lower limit values. If it does not exceed, the normal measurement status is restored. If the detected value exceeds the preset upper / lower limit value, it is judged whether or not the equipment inspection is necessary, and the maintenance / inspection company is notified. In addition, the owner of the septic tank (for example, a hotel, a restaurant, etc.) can be contacted if necessary.

FIG. 7 is a diagram showing an example of changes in water quality data of the inflow tank and the treated water tank of the combined septic tank. An example of the water quality data 22 (for example, COD value, BOD value) of the raw water of the inflow tank 1 and the water quality data 24 (for example, COD value, BOD value) of the treated water of the treated water tank is shown. In the design of combined septic tanks in Japan, many manufacturers use 50 mg / l (50 ppm) as a guideline for the water quality (BOD value) of raw water and 10 mg / l (10 ppm) as a guideline for the water quality (BOD value) of treated water. 23 is the upper limit value of the water quality data of the raw water (for example, + 30% of the initial value = 65 ppm), and 25 is the upper limit value of the water quality data of the treated water (for example, + 50% = 15 ppm of the initial value). Here, when the water quality data 22 of the raw water and the water quality data 24 of the treated water exceed the upper limit value, it is time to check various water quality sensors.

FIG. 8 is a diagram showing an example of a change in the difference between the raw water quality data of the combined septic tank and the water quality data of the treated water. An example of the transition of the difference between the water quality data of the raw water and the water quality data of the treated water (initial value in design is 40 ppm) is shown. 26 shows an example of the change in the difference between the water quality data of the raw water and the water quality data of the treated water, and 27 shows the lower limit value of the difference of the water quality data (for example, -30% of the initial value = 28 ppm). Here, when the difference between the water quality data of the raw water and the treated water falls below the lower limit value of 28 ppm, it is time to check various water quality sensors of the treated water if the water quality data of the raw water is not abnormal. If there are no abnormalities in the various water quality sensors, the function of the combined septic tank has deteriorated, so it is judged that it is time to clean and repair the septic tank.

FIG. 9 is a flowchart showing an example of detecting and contacting the maintenance / inspection time of the water quality sensor group for the combined septic tank. First, after the initial setting, it is determined whether or not the water quality data 24 detected by the various water quality sensors 11b of the treated water exceeds the preset upper limit value, and if not, the normal measurement status is restored. If the detected water quality data 24 exceeds a preset upper limit value, it is determined whether or not the water quality sensor needs to be inspected, and the maintenance / inspection company is notified. In addition, the owner of the septic tank (hotel, restaurant, etc.) can be contacted if necessary. Further, when the water quality data 22 detected by the raw water quality sensor 11a exceeds a preset upper limit value, the situation is reported to the owner of the hotel or restaurant, the reason is investigated, and then countermeasures are taken.

1: Inflow tank
2: Anaerobic floor tank
3: Aeration tank
4: Treatment water tank
5: Inflow pipe
6: Discharge pipe
7: Anaerobic floor
8: Anaerobic floor
9: Blower
9a: Blower drive motor
9b: Feed line of blower drive motor
9c: Blower drive motor current detector and start frequency detector 10: Pump 10a: Pump drive motor 10b: Pump drive motor power supply line 10c: Pump drive motor current detector and start frequency detector 11a: Raw water quality sensor 11b in the inflow tank: Various water quality sensors in the treated water tank 12: Septic tank system 13: Personal computer data collection system 14: Operation data collection system 15: Water quality data collection system 16: Blower operating current value 17: Blower operation Upper limit of current 18: Lower limit of blower operating current 19: Pump operating current value 20: Pump operating current upper limit 21: Pump operating current lower limit 22: Example of raw water quality data 23: Raw water Upper limit of water quality data 24: Example of water quality data of treated water 25: Upper limit of water quality data of treated water
26: An example of the difference between the raw water quality data and the treated water quality data 27: The lower limit of the difference between the raw water quality data and the treated water quality data

Claims (1)

A septic tank for domestic wastewater in large residential facilities such as hotels and restaurants. A blower for sending air to the aeration tank on the wake side of the inflow tank and a blower for discharging the treated water in the treated water tank to rivers and the sea. In the combined septic tank equipped with a pump, the blower, the current detection means of the drive motor of the pump, and the operation data collection system for recording the detected data are provided, and whether the detected operation current value is normal or abnormal. The maintenance and inspection system for septic tank blowers, pumps, and water quality sensors is characterized by setting the upper limit to + 10% or more of the initial value and the lower limit to -10% or less as criteria for determining.

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