Coagulant Dosage Adjustment System

Abstract

When it is impossible to obtain the turbidity that can be discharged, the warning lamp is lit on the screen of the remote operation terminal. 【Solution means】 The flocculant addition amount adjustment system 10 is composed of a flocculant addition amount adjustment device 100 that adjusts the addition amount of the flocculant to be added to the turbid water, a control panel 200 that controls the flocculant addition amount adjustment device 100, and a remote operation terminal 300 connected to the control panel by a communication line. The flocculant addition amount adjustment device 100 is equipped with a sensor for measuring the turbid water. The control panel has an adjustment means for performing a process for adjusting the addition amount of the flocculant to be added to the turbid water based on the measurement result by the sensor, and a warning means for lighting a warning lamp on the screen of the remote operation terminal when it is impossible to obtain the turbidity that can be discharged even after the adjustment of the addition amount of the flocculant is carried out by the adjustment means.

Description

Technical Field

[0001] The present invention relates to a flocculant addition amount adjustment system.

Background Art

[0002] The following flocculant addition amount adjustment device is known. This flocculant addition amount adjustment device includes a raw water inlet for taking in a part of the turbid water after the addition of the flocculant, a laser sensor for measuring the turbid water taken in from the raw water inlet, and a control unit that performs a process for adjusting the addition amount of the flocculant to be added to the turbid water based on the measurement result by the laser sensor (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional flocculant addition amount adjustment device, the addition amount of the flocculant to be added to the turbid water can be automatically adjusted based on the measurement result by the laser sensor. In this case, when the characteristics of the polluted raw water change significantly, there is a possibility that the turbidity of the treated water that can be discharged cannot be maintained within the initially set flocculant addition rate range. In such a case, it is necessary to take measures such as the operator manually adjusting the addition amount of the flocculant. At this time, when the operator is in a remote location, since it is necessary to move to the site to take measures, there is a problem that the response is delayed. For this reason, when it is not possible to obtain a dischargeable turbidity even by automatically adjusting the addition amount of the flocculant, a technology for notifying an operator in a remote location is required, but conventionally, no technology for solving this problem has been studied at all.

Means for Solving the Problems

[0005] The flocculant dosage adjustment system according to the present invention comprises a flocculant dosage adjustment device for adjusting the dosage of the flocculant to be added to turbid water, a control panel for controlling the flocculant dosage adjustment device, and a remote operation terminal connected to the control panel by a communication line. The flocculant dosage adjustment device is provided with a sensor for measuring turbid water. The control panel has an adjustment means for performing a process for adjusting the dosage of the flocculant to be added to the turbid water based on the measurement result by the sensor, and an alarm means for lighting an alarm lamp on the screen of the remote operation terminal when it is impossible to obtain a turbidity that can be discharged even after the adjustment of the dosage of the flocculant is carried out by the adjustment means. and is provided with The remote operation terminal includes a change reception means for receiving a change in the amount of the flocculant added from the user, and a transmission means for transmitting the change details of the flocculant received by the change reception means to the control panel. characterized in that.

Effect of the Invention

[0006] According to the present invention, when it is impossible to obtain a turbidity that can be discharged even after the adjustment of the dosage of the flocculant is carried out, the alarm lamp is lit on the screen of the remote operation terminal, so that it is possible to notify an operator at a remote location.

Brief Description of the Drawings

[0007]

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Mode for Carrying Out the Invention

[0008] The flocculant addition amount adjustment device in the present embodiment is used to automatically adjust the addition amount of the flocculant when treating turbid water by adding the flocculant to the turbid water generated at a factory, a construction site, etc. and precipitating suspended substances. And in the flocculant addition amount adjustment system in the present embodiment, a remote operation function is added to the flocculant addition amount adjustment device, and a mechanism for operating the control panel of the flocculant addition amount adjustment device by operating a remote operation terminal from a remote location is provided.

[0009] FIG. 1 is a block diagram showing the configuration of an embodiment of a flocculant addition amount adjustment system according to the present embodiment. The flocculant addition amount adjustment system 10 includes a flocculant addition amount adjustment device 100, a control panel 200, and a remote operation terminal 300. The flocculant addition amount adjustment device 100 is a device for automatically adjusting the amount of flocculant added to turbid water. The control panel 200 is also used as an operation panel connected to the flocculant addition amount adjustment device 100, and accepts operations on the flocculant addition amount adjustment device 100 locally. Further, the control panel 200 controls the flocculant addition amount adjustment device 100 as will be described later. The remote operation terminal 300 is a terminal used for remotely operating the flocculant addition amount adjustment device 100 at a remote location, and for example, an information terminal such as a smartphone, a tablet terminal, or a personal computer is used. In the present embodiment, the control panel 200 and the remote operation terminal 300 are connected via a communication line such as the Internet or a mobile phone line.

[0010] FIG. 2 is a diagram showing the configuration of an embodiment of the flocculant addition amount adjustment device 100 according to the present embodiment. As shown in FIG. 2, the flocculant addition amount adjustment device 100 includes a raw water inlet automatic valve 101, a raw water inlet 102, an overflow water detection sensor 103, an overflow port 104, a drain port automatic valve 105, a drain port 106, a transparent measurement unit 107, a laser sensor 108, and a cleaning upper opening 109.

[0011] In the flocculant addition amount adjustment device 100 shown in FIG. 2, when the raw water inlet automatic valve 101 is opened, a part of the turbid water after flocculant addition can be taken into the flocculant addition amount adjustment device 100 from the raw water inlet 102. At this time, when the drain port automatic valve 105 is closed, the taken-in turbid water accumulates in the flocculant addition amount adjustment device 100, and when the drain port automatic valve 105 is opened, the taken-in turbid water is drained from the drain port 106. Further, the overflowed turbid water is detected by the overflow water detection sensor 103 and drained from the overflow port 104. In addition, a cleaning upper opening 109 for cleaning the inside of the flocculant addition amount adjustment device 100 is provided at the upper part of the flocculant addition amount adjustment device 100.

[0012] The transparent measurement unit 107 uses a transparent member such as a glass tube or a PVC tube, and the laser sensor 108 provided in the transparent measurement unit 107 can measure the internal turbid water. As the laser sensor 108, a known transmission type laser discrimination sensor is used. Thereby, the laser sensor 108 can measure the turbid water in a non-contact manner.

[0013] FIG. 3 is a block diagram showing the configuration of an embodiment of the control panel 200 in the present embodiment. The control panel 200 includes a touch panel 201, a connection interface 202, and a control device 203.

[0014] The touch panel 201 is an input device that can operate the device by pressing the display on the screen. For example, the operator of the control panel 200 can operate the control panel 200 by touching or sliding the display items such as buttons and menus displayed on the liquid crystal panel using a finger or a touch pen. The touch panel 201 detects operations such as touch and slide by the operator and outputs the detection signal to the control device 203.

[0015] The connection interface 202 includes an interface for connecting the control panel 200 to the flocculant addition amount adjusting device 100 and an interface for connecting the control panel 200 to a communication line such as the Internet. As the interface for connecting to the communication line, for example, a wired LAN module for wired connection to the Internet or a wireless LAN module for wireless connection to the Internet is used, and the control panel 200 communicates with the remote operation terminal 300 via this connection interface 202.

[0016] The control device 203 is composed of a CPU, a memory, and other peripheral circuits, and controls the entire control panel 200. The memory constituting the control device 203 includes, for example, a volatile memory such as an SDRAM and a non-volatile memory such as a flash memory. The volatile memory is used as a work memory for the CPU to expand a program during program execution and as a buffer memory for temporarily recording data. Further, firmware for operating the control panel 200 and program data of software for operating various applications are recorded in the non-volatile memory.

[0017] FIG. 4 is a block diagram showing a configuration of an embodiment when a tablet terminal is used as the remote operation terminal 300 in the present embodiment. The remote operation terminal 300 includes a touch panel 301, a communication module 302, and a control device 303.

[0018] The touch panel 301 is an input device capable of operating a device by pressing a display on the screen. For example, an operator of the remote operation terminal 300 can operate the remote operation terminal 300 by touching or sliding display items such as buttons and menus displayed on the liquid crystal panel using a finger or a touch pen. The touch panel 301 detects operations such as touch and slide by the operator and outputs the detection signal to the control device 303.

[0019] The communication module 302 includes a communication module for communicating with other devices wirelessly or by wire. In the present embodiment, the remote operation terminal 300 communicates with the control panel 200 via the communication module 302.

[0020] The control device 303 is composed of a CPU, a memory, and other peripheral circuits, and controls the entire remote operation terminal 300. The memory constituting the control device 303 includes, for example, a volatile memory such as an SDRAM and a non-volatile memory such as a flash memory. The volatile memory is used as a work memory for the CPU to expand the program during program execution and as a buffer memory for temporarily recording data. In addition, firmware for operating the remote operation terminal 300 and program data of software for operating various applications are recorded in the non-volatile memory.

[0021] First, the method for treating turbid water assumed in this embodiment will be described. Turbid water generated at a factory or a construction site is collected in a raw water tank. Based on the initial set value of the coagulant addition amount obtained in advance, an initial amount of an inorganic coagulant is added to the turbid water and stirred. The addition of the inorganic coagulant is performed using a known method. Here, for example, it may be added by a stirrer attached to the raw water tank, or it may be injected into the pipe for sending to the reaction tank using a raw water pump and added by a line mixer (pipe with a mixing stirrer), or it may be sent to the reaction tank using a raw water pump and added by a reaction tank stirrer. Thereafter, based on the initial set value of the coagulant addition amount obtained in advance, an initial amount of a polymer coagulant is added to the turbid water. The polymer coagulant may be added by a reaction tank stirrer, but when mixing the inorganic coagulant in the reaction tank, a reaction tank for the polymer is provided for addition. The turbid water after adding the coagulant is transferred to a sedimentation separation tank.

[0022] In this embodiment, a part of the turbid water after adding the coagulant is taken into the coagulant addition amount adjustment device 100. In the coagulant addition amount adjustment device 100, the taken-in turbid water is measured by the laser sensor 108, and the control device 203 of the control panel 200 adjusts the addition amount of the coagulant based on the measurement result by the laser sensor 108.

[0023] In the flocculant dosage adjustment system 10 according to this embodiment, the control device 203 of the control panel 200 controls each part of the flocculant dosage adjustment device 100. In this embodiment, the control device 203 controls the inorganic flocculant injection pump, the polymer flocculant injection pump, the automatic valve opening and closing of the device, the laser sensor, and the timer, and performs measurements using the laser sensor and adjustment processing of the flocculant dosage. In addition, the operator of the control panel 200 can switch the manual / automatic control of each device by touching the screen displayed on the touch panel 201. Further, the touch panel 201 displays the operating state display, the setting of the timer time, the measured value and measurement result of the laser sensor, and an alarm lamp that lights up when the turbidity that can be discharged cannot be obtained even after the adjustment of the flocculant is performed a predetermined number of times.

[0024] When using the flocculant dosage adjustment device 100, preparations are made in advance. The content of the preliminary preparation is as follows. A coagulation sedimentation test is performed to obtain the initial setting value of the flocculant dosage. The correlation between the suspended solid content SS (mg / L) and the laser sensor measurement value (%) is grasped. The correlation between the injection pump output, the inverter frequency, and the pulse signal is grasped. The turbidity volume, the measurement standby time, the measurement time, and the injection stop value (laser sensor measurement value) are input to the control panel 200. In the control panel 200, the control device 203 records the input data in the memory.

[0025] The measurement time is the time for performing measurement using the laser sensor 108, and is calculated in advance as follows. In this embodiment, the measurement time is calculated as a value corresponding to the coagulation sedimentation rate of the wastewater treatment machine to be used. For example, if the coagulation sedimentation rate is 3 m / hour and the height of the flocculant dosage adjustment device 100 is 30 cm, then 30 cm / 300 cm × 60 minutes = 6 minutes. In this embodiment, since the measurement time is set in seconds, 6 minutes × 60 seconds = 360 seconds, and 360 sec is input to the device. The height of the flocculant dosage adjustment device 100 is the distance from the laser part of the laser sensor 108 to the piping position of the overflow water detection sensor 103. The wastewater treatment machine is selected from the turbidity volume, treatment conditions, etc., and the coagulation sedimentation rate varies depending on the wastewater treatment machine to be used.

[0026] Next, with reference to FIG. 5, the flocculant addition amount adjustment process executed by the control device 203 of the control panel 200 will be described. FIG. 5 is a flowchart showing the flow of the flocculant addition amount adjustment process using the flocculant addition amount adjustment device 100 in the present embodiment. The process shown in FIG. 5 starts when the operator turns on the power of the flocculant addition amount adjustment device 100 and the control panel 200. Also, the process shown in FIG. 5 ends when the operator turns off the power of the flocculant addition amount adjustment device 100 and the control panel 200.

[0027] In step S10, the control device 203 opens the raw water inlet automatic valve 101 of the flocculant addition amount adjustment device 100 and closes the drain port automatic valve 105 in order to take in a part of the turbid water after the addition of the flocculant. As a result, the turbid water after the addition of the flocculant flows into the flocculant addition amount adjustment device 100 from the raw water inlet 102 only when the raw water pump is operating.

[0028] In step S20, the control device 203 determines whether or not overflow water is detected by the overflow water detection sensor 103. If an affirmative determination is made in step S20, the process proceeds to step S30. When an overflow occurs in the flocculant addition amount adjustment device 100, the overflow water is drained from the overflow port 104.

[0029] In step S30, the control device 203 closes the raw water inlet automatic valve 101. The time from when the control device 203 controls the raw water inlet automatic valve 101 to close until the raw water inlet automatic valve 101 actually closes is the standby time.

[0030] In step S40, the control device 203 starts the measurement by the laser sensor 108. In the flocculant dosage adjustment device 100 of the present embodiment, as described above, the laser sensor 108 is provided in the transparent measurement unit 107 such as a glass tube or a PVC tube, and the turbid water passing through the transparent measurement unit 107 can be measured by the laser sensor 108. Note that since the measured value of the laser sensor 108 is the light reception amount (%) with respect to the laser irradiation amount, the light reception amount (%) changes depending on the degree of turbidity of the turbid water. Therefore, based on the measured value of the laser sensor 108, the sedimentation rate of the flocs in the turbid water and the degree of turbidity of the supernatant water after the flocs have sedimented can be grasped. For example, when using the laser sensor 108, measurement is possible when the suspended solid mass SS is 100 or less.

[0031] In step S50, the control device 203 determines whether or not the measurement by the laser sensor 108 has ended. In the present embodiment, the control device 203 determines that the measurement by the laser sensor 108 has ended when the measurement time calculated in the above-described preliminary preparation has elapsed after starting the measurement by the laser sensor 108. Here, for example, it is assumed that the measurement by the laser sensor 108 ends when 360 seconds have elapsed after starting the measurement by the laser sensor 108. If an affirmative determination is made in step S50, the process proceeds to step S60.

[0032] In step S60, the control device 203 performs a process for adjusting the dosage of the flocculant to be added to the turbid water based on the measurement result by the laser sensor 108 at the time when the measurement has ended. In the present embodiment, the measured value (%) of the laser sensor 108 is compared with a preset determination threshold value to determine whether the determination result is OK or NG. Hereinafter, the determination threshold value will be described.

[0033] In this embodiment, the relationship between the measured value of the laser sensor 108, that is, the light reception amount (%) with respect to the laser irradiation amount and the suspended solid amount SS (mg / L) has been obtained in advance. FIG. 6 is a diagram showing an example of a graph indicating the correlation between the measured value (%) of the laser sensor 108 and the suspended solid amount SS (mg / L). In this embodiment, based on the correlation between the measured value (%) of the laser sensor 108 and the suspended solid amount SS (mg / L) as shown in FIG. 6, a threshold value (%) for determining whether the determination result for adjusting the addition amount of the flocculant is OK or NG is set in advance. For example, when the suspended solid amount SS as a general discharge standard is set to 25 mg / L, based on the correlation between the measured value (%) of the laser sensor 108 and the suspended solid amount SS (mg / L), the measured value of the laser sensor 108 as the discharge standard is obtained as 46%. In this embodiment, for example, 46% is set as the threshold value for determination, and the control device 203 determines that the determination result is NG when the measured value of the laser sensor 108 is less than 46%. As a result, when the suspended solid amount SS is greater than 25 mg / L, it is determined as NG. Also, the control device 203 sets the threshold value so as to determine that the determination result is OK when the measured value of the laser sensor 108 is 46% or more. As a result, when the suspended solid amount SS is 25 mg / L or less, it is determined as OK.

[0034] When the determination result is NG, the control device 203 controls to increase the amount of the flocculant added to the turbid water by a predetermined amount. For example, it controls to increase the addition amount of the polymer flocculant per 1 L of turbid water by 1 mg. Also, it controls to increase the addition amount of the inorganic flocculant per 1 L of turbid water by 10 mg. On the other hand, when the determination result is OK for a predetermined number of times, for example, continuously 3 times, the control device 203 controls to decrease the amount of the flocculant added to the turbid water by a predetermined amount. For example, it controls to decrease the addition amount of the polymer flocculant per 1 L of turbid water by 1 mg. Also, it controls to decrease the addition amount of the inorganic flocculant per 1 L of turbid water by 10 mg.

[0035] In step S70, the control device 203 opens the drain port automatic valve 105. As a result, the turbid water taken into the flocculant addition amount adjusting device 100 is drained from the drain port 106.

[0036] In step S80, the control device 203 waits until the next measurement starts. The waiting time until the next measurement starts is set to an arbitrary number of seconds in advance. In this embodiment, for example, 15 seconds is set as the waiting time until the next measurement starts, and the control device 203 repeats the process from step S10 after waiting for 15 seconds. As described above, when the power of the flocculant addition amount adjusting device 100 and the control panel 200 is turned off by the operator, the process ends.

[0037] As described above, in the flocculant addition amount adjusting system 10 according to this embodiment, it is possible to automatically adjust the amount of flocculant added to turbid water and perform turbid water treatment at an optimal addition rate. However, when the characteristics of the polluted raw water change significantly, it may not be possible to maintain the turbidity of the treated water that can be discharged within the initially set flocculant addition rate range. For this reason, in the flocculant addition amount adjusting system 10 according to this embodiment, when the control device 203 of the control panel 200 cannot obtain a turbidity that can be discharged even after adjusting the addition amount of the flocculant a specified number of times in advance, the warning lamp is lit to notify the operator. The turbidity that can be discharged may be, for example, 25 mg / L for the suspended solid amount SS in accordance with the above-described general discharge standards.

[0038] In this embodiment, an operation screen on which buttons for operating the flocculant addition amount adjusting device 100 and information indicating the operation status of the flocculant addition amount adjusting device 100 are displayed is shown on the touch panel 201 of the control panel 200. The operator of the control panel 200 can operate the flocculant addition amount adjusting device 100 or check the operation status of the flocculant addition amount adjusting device 100 by operating the touch panel 201.

[0039] For example, as shown in FIG. 7, a touch panel 201 is mounted on the control panel 200, and an operation screen is displayed on the touch panel 201. When the control panel 203 determines that the lighting condition of the warning lamp is satisfied, it lights the warning lamp 7a on the operation screen displayed on the touch panel 201. Thereby, when the local operator confirms that the warning lamp 7a is lit on the operation screen of the control panel 200, the operator can adjust the addition amount of the flocculant by operating the touch panel 201 to change the flocculant addition rate range.

[0040] Also, in the present embodiment, a remote operation screen similar to the operation screen displayed on the touch panel 201 of the control panel 200 is displayed on the touch panel 301 of the remote operation terminal 300. The operator of the remote operation terminal 300 can operate the flocculant addition amount adjusting device 100 or check the operation status of the flocculant addition amount adjusting device 100 by operating the touch panel 301. Note that the technology of displaying a remote operation screen similar to the operation screen displayed on the touch panel 201 of the control panel 200 on the touch panel 301 of the remote operation terminal 300 located remotely and operating the control panel 200 by operating the remote operation screen is well-known, and thus the description thereof is omitted here.

[0041] For example, as shown in FIG. 8, a remote operation screen on which the same content as the operation screen displayed on the touch panel 201 of the control panel 200 is displayed is shown on the touch panel 301. When the control panel 203 determines that the lighting condition of the warning lamp is satisfied, it lights the warning lamp 8a on the remote operation screen displayed on the touch panel 301. Thereby, when the user of the remote operation terminal 300, for example, an operator at a remote location, confirms that the warning lamp 8a is lit on the operation screen of the remote operation terminal 300, the user can change the addition amount of the flocculant by operating the touch panel 301.

[0042] FIG. 9 is a diagram showing an example of changing the addition amount of the flocculant. When the initial addition amount of the flocculant (flocculant addition rate range) is set as shown in FIG. 9(A), if the alarm lamp lights up on the operation screen or the remote operation screen, the operator changes the addition amount of the flocculant as shown in FIG. 9(B) on the operation screen or the remote operation screen. Thereby, the operator can operate the remote operation terminal 300 from a remote location to change the addition amount of the inorganic flocculant and the addition amount of the polymer flocculant to the turbid water. Note that the example shown in FIG. 9 is just an example, and the content of the change in the addition amount of the flocculant is not limited to this.

[0043] In the present embodiment, since the display content of the remote operation screen displayed on the touch panel 301 of the remote operation terminal 300 is the same as the display content of the operation screen displayed on the touch panel 201 of the control panel 200, the user of the remote operation terminal 300, for example, an operator at a remote location, can adjust the addition amount of the flocculant on the same screen as when operating the control panel 200 on-site.

[0044] When the control device 303 of the remote operation terminal 300 is operated by the user on the touch panel 301 and the addition amount of the flocculant is changed, the control device 303 transmits the content of the change in the addition amount of the flocculant to the control panel 200. In the control panel 200, when the addition amount of the flocculant is changed on the touch panel 301 of the remote operation terminal 300, the control device 203 changes the addition amount of the flocculant added to the turbid water based on the instruction from the remote operation terminal 300. Thereby, when the control device 203 cannot obtain a dischargeable turbidity with the addition amount of the flocculant set as the initial value, the control device 203 can change the addition amount of the flocculant based on the instruction from the remote operation terminal 300.

[0045] Note that the number of times of repeating the adjustment of the addition amount of the flocculant for the lighting condition of the alarm lamp, that is, the number of times of repeating the increase and decrease of the flocculant (the specified number of cycles of increasing and decreasing the flocculant) can be arbitrarily set, for example, between 1 and 99 times. In the present embodiment, for example, if the dischargeable turbidity cannot be obtained even after performing it 3 times, the alarm lamp is to be lit.

[0046] FIG. 10 is a flowchart showing the flow of the warning lamp lighting process executed by the control panel 200 in the present embodiment. The process shown in FIG. 10 is executed by the control device 203 as a program that starts when the lighting conditions of the warning lamp described above are satisfied.

[0047] In step S110, as described above, the control device 203 lights the warning lamp on the operation screen displayed on the touch panel 201 of the control panel 200. Also, the warning lamp is lit on the remote operation screen displayed on the touch panel 301 of the remote operation terminal 300. Then, the process ends.

[0048] FIG. 11 is a flowchart showing the flow of the process executed by the remote operation terminal 300 in the present embodiment. The process shown in FIG. 11 is executed by the control device 303 as a program that starts when the touch panel 301 is operated by the operator and the above-described flocculant addition rate range is changed.

[0049] In step S210, as described above, the control device 303 transmits the operation content on the touch panel 301 to the control panel 200. Then, the process ends.

[0050] FIG. 12 is a flowchart showing the flow of the addition amount change process executed by the control panel 200 in the present embodiment. The process shown in FIG. 12 is executed by the control device 203 as a program that starts when the change of the flocculant addition amount is instructed by receiving the operation content indicating that the flocculant addition rate range has been changed from the remote operation terminal 300.

[0051] In step S310, as described above, the control device 203 changes the addition amount of the flocculant added to the turbid water based on the instruction from the remote operation terminal 300. Then, the process ends.

[0052] According to the embodiment described above, the following operational effects can be obtained. (1) The flocculant dosage adjustment device 100 is equipped with a laser sensor 108 that measures the turbid water taken in from the raw water inlet 102. The control device 203 of the control panel 200 performs a process for adjusting the dosage of the flocculant to be added to the turbid water based on the measurement results by the laser sensor. When it is not possible to obtain a turbidity that can be discharged even after the adjustment of the flocculant dosage has been carried out a predetermined number of times, an alarm lamp is lit on the touch panel 301 of the remote operation terminal 300. By doing so, it is possible to notify an operator at a remote location that it is not possible to obtain a turbidity that can be discharged even after the adjustment of the flocculant dosage has been carried out a predetermined number of times.

[0053] (2) In the remote operation terminal 300, the control device 303 is configured to receive a change in the dosage of the flocculant from the user and transmit the received change details of the flocculant to the control panel 200. By doing so, the operator can instruct a change in the dosage of the flocculant added to the turbid water from a remote location, and the dosage of the flocculant changed at the remote operation terminal 300 can be transmitted to the control panel 200.

[0054] (3) When the dosage of the flocculant is changed at the remote operation terminal 300, the control device 203 of the control panel 200 is configured to change the dosage of the flocculant added to the turbid water based on the changed details of the flocculant. By doing so, the dosage of the flocculant can be arbitrarily adjusted even at a remote location, enabling prompt initial response and minimizing the deterioration of the treated water quality.

[0055] (4) An alarm lamp is also lit on the touch panel 201 of the control panel 200. By doing so, it is possible to notify an operator operating the control panel 200 that it is not possible to obtain a turbidity that can be discharged even after the adjustment of the flocculant dosage has been carried out a predetermined number of times.

[0056] (5) The display content of the touch panel 301 of the remote operation terminal 300 was made the same as the display content of the touch panel 201 of the control panel 200. As a result, an operator operating the remote operation terminal 300 can operate the same operation screen as the control panel 200, and thus can operate the remote operation terminal 300 with a familiar operation feeling.

[0057] (6) The predetermined number of times of repeating the adjustment of the addition amount of the flocculant as the lighting condition of the alarm lamp can be arbitrarily set. As a result, the operator can arbitrarily set the number of times as the lighting condition of the alarm lamp.

[0058] (7) The control device 203 compares the measured value of the laser sensor 108 with a preset determination threshold value to determine whether the determination result is OK or NG. When the determination result is NG, it controls to increase the amount of the flocculant added to the turbid water by a predetermined amount. When the OK determination result continues three times in a row, it controls to decrease the amount of the flocculant added to the turbid water by a predetermined amount. As a result, since the sedimentation rate of the flocculated flocs in the turbid water and the degree of turbidity of the supernatant water after the flocculated flocs have sedimented can be grasped based on the measured value of the laser sensor 108, the addition amount of the flocculant can be adjusted according to the sedimentation rate of the flocculated flocs in the turbid water and the degree of turbidity of the supernatant water after the flocculated flocs have sedimented.

[0059] (8) The flocculant addition amount adjustment device 100 further includes a transparent measurement unit 107 formed of a transparent member, and the laser sensor 108 measures the turbid water passing through the transparent measurement unit 107. As a result, the supernatant water after the SS component of the turbid water has sedimented can be measured via the transparent measurement unit 107 without bringing the laser sensor 108 into contact with the turbid water.

[0060] (9) The measurement time by the laser sensor 108 was calculated in advance in accordance with the flocculation sedimentation rate of the wastewater treatment machine to be used. As a result, the measurement accuracy by the laser sensor 108 can be improved.

[0061] (10) The control device 203 opens the raw water inlet automatic valve 101 of the flocculant dosage adjustment device 100 to take in a part of the turbid water from the raw water inlet 102 and closes the drain port automatic valve 105. When the overflow water sensing sensor 103 senses the overflow water, the raw water inlet automatic valve 101 is closed. Based on the measurement results obtained by the laser sensor 108 until the measurement time elapses, a process is performed to adjust the dosage of the flocculant to be added to the turbid water. When the measurement time elapses, the drain port automatic valve 105 is opened to drain the turbid water. Thus, a part of the turbid water can be taken in from the raw water inlet 102 of the flocculant dosage adjustment device 100, measured by the laser sensor 108, and the dosage of the flocculant can be adjusted based on the measurement results.

[0062] (11) After opening the drain port automatic valve 105, the control device 203 starts the next measurement after a preset waiting time has elapsed. Thus, it is possible to start the next measurement after waiting for the turbid water to be drained from the flocculant dosage adjustment device 100.

[0063] - Modification Example - Note that the flocculant dosage adjustment system of the above-described embodiment can also be modified as follows. (1) In the above-described embodiment, an example was described in which the control device 203 controls to decrease the amount of the flocculant added to the turbid water by a predetermined amount when the determination result is OK three times in a row. However, the condition for controlling to decrease the amount of the flocculant added to the turbid water by a predetermined amount is not limited to the case where the determination result is OK three times in a row. For example, the control may be such that the amount of the flocculant added to the turbid water is decreased by a predetermined amount when the determination result is OK once, or the control may be such that the amount of the flocculant added to the turbid water is decreased by a predetermined amount when the determination result is OK for a plurality of times other than three times in a row.

[0064] (2) In the above-described embodiment, an example was described in which the control device 203 controls to increase the amount of the flocculant added to the turbid water by a predetermined amount when the determination result is NG. However, the condition for controlling to increase the amount of the flocculant added to the turbid water by a predetermined amount may be set such that the state where the determination result is NG continues for a predetermined number of times. For example, when the state where the determination result is NG continues twice, the control may be performed to increase the amount of the flocculant added to the turbid water by a predetermined amount.

[0065] (3) In the above-described embodiment, the flocculant addition amount adjusting device 100 shown in FIG. 2 was used, and a part of the turbid water after the addition of the flocculant was taken into the flocculant addition amount adjusting device 100 and measured by the laser sensor 108. An example was described in which the control device 203 of the control panel 200 adjusts the addition amount of the flocculant based on the measurement result by the laser sensor 108. However, the present invention is also applicable when using a known flocculant addition amount adjusting device that measures the turbid water with a raw water concentration (turbidity) meter, for example, a turbidity meter immersion type sensor, and adjusts the addition amount of the flocculant based on the measurement result by the turbidity meter immersion type sensor. That is, in a flocculant addition amount adjusting device that measures the turbid water with a raw water concentration (turbidity) meter and adjusts the addition amount of the flocculant based on the measurement result by the turbidity meter, when the control device 203 of the control panel 200 cannot obtain a turbidity that can be discharged even after adjusting the addition amount of the flocculant, the warning lamp may be turned on to notify the operator.

[0066] A method for adjusting the dosage of a flocculant based on the measurement results of a turbidimeter uses, for example, a known method as shown in FIG. 13. In a known flocculant dosage adjustment device using a turbidimeter, before the device operates, raw water and sediment before adding the flocculant are collected, and about 3 to 5 test turbid waters with low to high turbidity are prepared. The optimal flocculant addition rate for each turbidity is determined by a flocculation sedimentation test, and the value is input into the control panel to create a correlation graph between turbidity and the addition rate. Then, based on the created correlation graph, while continuously measuring the turbidity using a turbidimeter in the "2. Raw water tank" where the "1. Turbid water generated during construction, etc." is collected, the flocculant addition rate is changed. The turbid water collected in the "2. Raw water tank" is sent to the "6. Sedimentation separation tank" using the "3. Raw water pump". In this process, "4. Adding the flocculant to the raw water" and "5. Stirring the flocculant and the raw water" are carried out. In the "6. Sedimentation separation tank", it is separated into "10. Precipitated sludge" and "7. Separated clear water", and the "10. Precipitated sludge" is discharged to the outside at "11. Sludge discharge". Also, the "7. Separated clear water" is transferred to the "8. Treatment water tank", and the turbidity is measured using a turbidimeter. As a result, when the turbidity of the treated water that can be discharged is obtained, it is discharged to the outside at "9. Discharge".

[0067] On the other hand, in the same way as the above-described treatment, when the control device 203 of the control panel 200 cannot obtain a turbidity that can be discharged even after adjusting the dosage of the flocculant, the warning lamp 7a is lit on the touch panel 201 of the control panel, and the warning lamp 8a is lit on the touch panel 301 of the remote operation terminal 300. As a result, when the local operator confirms that the warning lamp 7a is lit on the operation screen of the control panel 200, the touch panel 201 can be operated to adjust the dosage of the flocculant. Also, when the user of the remote operation terminal 300, for example, an operator at a remote location, confirms that the warning lamp 8a is lit on the operation screen of the remote operation terminal 300, the touch panel 301 can be operated to change the dosage of the flocculant.

[0068] Note that the present invention is not limited to the configuration in the above-described embodiment in any way as long as the characteristic functions of the present invention are not impaired. Also, a configuration combining the above-described embodiment and a plurality of modification examples may be used.

Description of Symbols

[0069] 10 Coagulant Dosage Adjustment System 100 Coagulant Dosage Adjustment Device 101 Raw Water Inlet Automatic Valve 102 Raw Water Inlet 103 Overflow Water Sensing Sensor 104 Overflow Outlet 105 Drain Outlet Automatic Valve 106 Drain Outlet 107 Transparent Measurement Section 108 Laser Sensor 109 Upper Opening for Cleaning 200 Control Panel 201 Touch Panel 202 Connection Interface 203 Control Device 300 Remote Operation Terminal 301 Touch Panel 302 Communication Module 303 Control Device

Claims

1. A flocculant addition amount adjustment system comprising a flocculant addition amount adjustment device that adjusts the amount of flocculant added to turbid water, a control panel that controls the flocculant addition amount adjustment device, and a remote control terminal connected to the control panel via a communication line. The flocculant addition amount adjusting device is Equipped with a sensor to measure turbid water, The control panel includes: An adjustment means for performing processing to adjust the amount of flocculant to be added to the turbid water based on the measurement results by the sensor; and a warning means for turning on a warning lamp on a screen of the remote control terminal when the turbidity at which the discharge is possible cannot be obtained even after the adjustment of the amount of the flocculant added by the adjustment means, The remote control terminal includes: A change receiving means for receiving a change in the amount of flocculant added from a user; A flocculant addition amount adjustment system comprising: a transmission means for transmitting the changes to the flocculant accepted by the change acceptance means to the control panel.

2. In the flocculant addition amount adjustment system according to claim 1, The flocculant addition amount adjustment system is characterized in that the alarm means lights up an alarm lamp on the screen of the remote control terminal when a turbidity sufficient for discharge cannot be obtained even after the adjustment means has adjusted the amount of flocculant added a predetermined number of times.

3. In the flocculant addition amount adjustment system according to claim 1 or 2, The control panel includes: The flocculant addition amount adjustment system is characterized in that it further comprises a change means for changing the amount of flocculant added based on the change in the amount of flocculant added when the amount of flocculant added is changed on the remote control terminal.

4. In the flocculant addition amount adjustment system according to claim 1 or 2, The flocculant addition amount adjustment system is characterized in that the warning means also lights up a warning lamp on the screen of the control panel.

5. In the flocculant addition amount adjustment system according to claim 4, A system for adjusting the amount of flocculant added, characterized in that the display contents of an operation screen displayed on the remote control terminal and the display contents of an operation screen displayed on the control panel are identical.

6. In the flocculant addition amount adjustment system according to claim 2, A system for adjusting the amount of flocculant added, characterized in that the predetermined number of times for repeating the adjustment of the amount of flocculant added can be set arbitrarily.

7. In the flocculant addition amount adjustment system according to claim 1 or 2, The sensor is a laser sensor, The adjustment means compares the measurement value of the laser sensor with a preset judgment threshold value to determine whether the judgment result is OK or NG, and if the judgment result is NG, controls the amount of coagulant added to the turbid water to increase a predetermined amount, and if the judgment result is OK, controls the amount of coagulant added to the turbid water to decrease a predetermined amount. This is a coagulant addition amount adjustment system.

8. The flocculant addition amount adjustment system according to claim 7, The flocculant addition amount adjustment system is characterized in that the adjustment means controls the amount of flocculant added to the turbid water to increase by a predetermined amount when the judgment result is NG a predetermined number of times in succession.

9. The flocculant addition amount adjustment system according to claim 7, The flocculant addition amount adjustment system is characterized in that the adjustment means controls the amount of flocculant added to the turbid water to be reduced by a predetermined amount when the judgment result is OK a predetermined number of times in succession.

10. The flocculant addition amount adjustment system according to claim 7, The flocculant addition amount adjusting device is Further comprising a transparent measuring unit made of a transparent member, A system for adjusting the amount of flocculant added, characterized in that the laser sensor measures the turbid water passing through the transparent measuring section.

11. The flocculant addition amount adjustment system according to claim 7, A system for adjusting the amount of flocculant added, characterized in that the measurement time by the laser sensor is calculated in advance according to the flocculation and sedimentation speed of the wastewater treatment machine being used.

12. The flocculant addition amount adjustment system according to claim 11, The adjustment means opens the automatic raw water inlet valve of the coagulant addition amount adjustment device to take in a portion of the turbid water from the raw water inlet and closes the automatic drain outlet valve, closes the automatic raw water inlet valve when overflow water is detected by an overflow water detection sensor, performs processing to adjust the amount of coagulant to be added to the turbid water based on the measurement results obtained by measuring using a laser sensor until the measurement time has elapsed, and opens the automatic drain outlet valve to drain the turbid water when the measurement time has elapsed. This is a coagulant addition amount adjustment system characterized by the above.

13. The flocculant addition amount adjustment system according to claim 12, A system for adjusting the amount of flocculant added, characterized in that the adjustment means starts the next measurement after a preset waiting time has elapsed after the automatic drain valve is opened.

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