Coagulant addition amount adjustment system

Abstract

If the turbidity level required for discharge cannot be obtained, an alarm light will illuminate on the remote control terminal screen. [Solution] The coagulant addition amount adjustment system 10 consists of a coagulant addition amount adjustment device 100 that adjusts the amount of coagulant added to turbid water, a control panel 200 that controls the coagulant addition amount adjustment device 100, and a remote operation terminal 300 connected to the control panel by a communication line. The coagulant addition amount adjustment device 100 is equipped with a sensor that measures turbid water, and the control panel is equipped with an adjustment means that performs processing to adjust the amount of coagulant added to turbid water based on the measurement results from the sensor, and an alarm means that lights up an alarm lamp on the screen of the remote operation terminal if a turbidity suitable for discharge cannot be obtained even after adjusting the amount of coagulant added by the adjustment means.

Description

Technical Field

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

Background Art

[0002] The following coagulant addition amount adjustment device is known. This coagulant addition amount adjustment device includes a raw water inlet for taking in a part of the turbid water after the addition of the coagulant, a laser sensor for measuring the turbid water taken in from the raw water inlet, and a control unit for performing a process for adjusting the addition amount of the coagulant 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 coagulant addition amount adjustment device, the addition amount of the coagulant 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, it may not be possible to maintain the turbidity of the treated water that can be discharged within the initially set coagulant addition rate range. In such a case, it is necessary to take measures such as the operator manually adjusting the coagulant addition amount. At this time, when the operator is in a remote location, it is necessary to move to the site to take measures, resulting in a problem of delay in response. Therefore, a technique for notifying an operator in a remote location when the addition amount of the coagulant cannot be automatically adjusted to obtain a turbidity that can be discharged is required, but conventionally, no technique for solving this problem has been studied.

Means for Solving the Problems

[0005] The coagulant addition amount adjustment system according to the present invention comprises a coagulant addition amount adjustment device for adjusting the amount of coagulant added to turbid water, a control panel for controlling the coagulant addition amount adjustment device, and a remote operation terminal connected to the control panel by a communication line, wherein the coagulant addition amount adjustment device is equipped with a sensor for measuring turbid water, and the control panel is equipped with an adjustment means for performing a process to adjust the amount of coagulant added to the turbid water based on the measurement results from the sensor, and an alarm means for illuminating an alarm lamp on the screen of the remote operation terminal if a dischargeable turbidity cannot be obtained even after adjusting the amount of coagulant added by the adjustment means. [Effects of the Invention]

[0006] According to the present invention, if the turbidity level that allows for discharge cannot be obtained even after adjusting the amount of coagulant added, an alarm lamp is illuminated on the screen of the remote control terminal, thereby notifying the operator in a remote location. [Brief explanation of the drawing]

[0007] [Figure 1] This is a block diagram showing the configuration of one embodiment of a system for adjusting the amount of flocculant added. [Figure 2] This diagram shows the configuration of one embodiment of a flocculant addition amount adjustment device. [Figure 3] This is a block diagram showing the configuration of one embodiment of a control panel. [Figure 4] This is a block diagram showing the configuration of one embodiment of a remote control terminal. [Figure 5] This is a flowchart showing the process of adjusting the amount of coagulant added using a coagulant addition adjustment device. [Figure 6] This is an example of a graph showing the correlation between laser sensor readings (%) and suspended solids (SS) (mg / L). [Figure 7] This figure shows an example of the arrangement of alarm lamps in the control panel 200. [Figure 8] This figure shows an example of the arrangement of alarm lamps in the remote control terminal 300. [Figure 9]This figure shows examples of changes in the amount of flocculant added. [Figure 10] This is a flowchart illustrating the flow of the alarm lamp illumination process performed by the control panel 200. [Figure 11] This is a flowchart illustrating the processing flow executed by the remote control terminal 300. [Figure 12] This is a flowchart illustrating the flow of the additive amount change process executed by the control panel 200. [Figure 13] This diagram illustrates a method for adjusting the amount of coagulant added based on the measurement results obtained using a turbidimeter. [Modes for carrying out the invention]

[0008] The coagulant addition amount adjustment device in this embodiment is used to automatically adjust the amount of coagulant added when treating turbid water generated in factories, construction sites, etc., by adding a coagulant to the water to settle suspended solids. Furthermore, the coagulant addition amount adjustment system in this embodiment is equipped with a remote control function, providing a mechanism for operating the control panel of the coagulant addition amount adjustment device from a remote location by operating a remote control terminal.

[0009] Figure 1 is a block diagram showing the configuration of one embodiment of the coagulant addition amount adjustment system in this embodiment. The coagulant addition amount adjustment system 10 consists of a coagulant addition amount adjustment device 100, a control panel 200, and a remote operation terminal 300. The coagulant addition amount adjustment device 100 is a device for automatically adjusting the amount of coagulant added to turbid water. The control panel 200 is also used as an operation panel connected to the coagulant addition amount adjustment device 100 and accepts operations for the coagulant addition amount adjustment device 100 on-site. The control panel 200 also controls the coagulant addition amount adjustment device 100 as described later. The remote operation terminal 300 is a terminal used to remotely operate the coagulant addition amount adjustment device 100 from a remote location, and for example, an information terminal such as a smartphone, tablet terminal, or personal computer is used. In this 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] Figure 2 shows the configuration of one embodiment of the coagulant addition amount adjustment device 100 in this embodiment. As shown in Figure 2, the coagulant addition amount adjustment device 100 consists of a raw water inlet automatic valve 101, a raw water inlet 102, an overflow water sensing sensor 103, an overflow port 104, a drain port automatic valve 105, a drain port 106, a transparent measuring unit 107, a laser sensor 108, and a cleaning upper opening 109.

[0011] In the coagulant addition amount adjustment device 100 shown in Figure 2, when the raw water inlet automatic valve 101 is opened, a portion of the turbid water after coagulant addition can be taken into the coagulant addition amount adjustment device 100 from the raw water inlet 102. When the drain outlet automatic valve 105 is closed, the taken-in turbid water accumulates inside the coagulant addition amount adjustment device 100, and when the drain outlet automatic valve 105 is opened, the taken-in turbid water is drained from the drain outlet 106. In addition, the overflowing turbid water is detected by the overflow water sensing sensor 103 and drained from the overflow outlet 104. Furthermore, the top of the coagulant addition amount adjustment device 100 is provided with an upper cleaning opening 109 for cleaning the inside of the coagulant 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. Thus, 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, an operator of the control panel 200 can operate the control panel 200 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 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 adjustment device 100 and an interface for connecting the control panel 200 to a communication line such as the Internet. The interface for connecting to the communication line uses, for example, a wired LAN module for wired connection to the Internet or a wireless LAN module for wireless connection to the Internet, 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 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 that can operate 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 unit 303 consists of a CPU, memory, and other peripheral circuits, and controls the entire remote control terminal 300. The memory comprising the control unit 303 includes volatile memory such as SDRAM and non-volatile memory such as flash memory. The volatile memory is used as work memory for the CPU to load programs when executing programs, and as buffer memory for temporarily recording data. The non-volatile memory stores firmware for operating the remote control terminal 300 and program data for software that runs various applications.

[0021] First, the method for treating turbid water assumed in this embodiment will be described. Turbid water generated at factories, construction sites, etc., is collected in a raw water tank. Based on the initial setting value of the amount of coagulant to be added, which has been determined in advance, an initial amount of inorganic coagulant is added to the turbid water and stirred. The addition of the inorganic coagulant is carried out using a known method. Here, for example, it may be added using a stirrer attached to the raw water tank, or it may be injected into the piping that sends the raw water to the reaction tank using a raw water pump and added using a line mixer (piping with a mixing stirrer), or it may be sent to the reaction tank using a raw water pump and added using a reaction tank stirrer. After that, based on the initial setting value of the amount of coagulant to be added, which has been determined in advance, an initial amount of polymer coagulant is added to the turbid water. Polymer coagulant can be added using a reaction tank stirrer, but if the inorganic coagulant is mixed in the reaction tank, a separate reaction tank for polymer coagulant should be provided for addition. After the addition of the coagulant, the turbid water is transferred to a sedimentation separation tank.

[0022] In this embodiment, a portion of the turbid water after the addition of 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 a laser sensor 108, and the control device 203 of the control panel 200 adjusts the amount of coagulant added based on the measurement results from the laser sensor 108.

[0023] In the coagulant addition amount adjustment system 10 of this embodiment, the control device 203 of the control panel 200 controls each part of the coagulant addition amount adjustment device 100. In this embodiment, the control device 203 controls the inorganic coagulant injection pump, the polymer coagulant injection pump, the opening and closing of the automatic valve attached to the device, the laser sensor, and the timer, and also performs measurement using the laser sensor and adjustment processing of the coagulant addition amount. Furthermore, the operator of the control panel 200 can switch between manual and automatic control of each device by touching the screen displayed on the touch panel 201. The touch panel 201 also displays the operating status, timer time settings, laser sensor measurements and measurement results, and an alarm lamp that lights up when a dischargeable turbidity cannot be obtained even after adjusting the coagulant a predetermined number of times.

[0024] Prior to using the flocculant addition amount adjustment device 100, preparations are carried out. The preparations are as follows: A flocculation and sedimentation test is performed to determine the initial setting value for the flocculant addition amount. The correlation between the suspended solids amount (SS) (mg / L) and the laser sensor measurement value (%) is determined. The correlation between the chemical injection pump output, inverter frequency, and pulse signal is determined. The turbid water volume, measurement waiting time, measurement time, and chemical 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 into memory.

[0025] The measurement time is the time taken to perform the measurement using the laser sensor 108, and is calculated in advance as follows. In this embodiment, the measurement time is calculated to match the coagulation and sedimentation rate of the wastewater treatment machine used. For example, if the coagulation and sedimentation rate is 3 m / hour and the height of the coagulant addition amount adjustment device 100 is 30 cm, then 30 cm / 300 cm × 60 minutes = 6 minutes. In this embodiment, the measurement time is set in seconds, so 6 minutes × 60 seconds = 360 seconds, and 360 sec is input to the device. The height of the coagulant addition amount adjustment device 100 is the distance from the laser part of the laser sensor 108 to the piping position of the overflow water sensing sensor 103. The wastewater treatment machine is selected based on the amount of turbid water and treatment conditions, and the coagulation and sedimentation rate will differ depending on the wastewater treatment machine used.

[0026] The following describes the coagulant addition amount adjustment process performed by the control device 203 of the control panel 200, using Figure 5 as an example. Figure 5 is a flowchart showing the flow of the coagulant addition amount adjustment process using the coagulant addition amount adjustment device 100 in this embodiment. The process shown in Figure 5 starts when the operator turns on the power to the coagulant addition amount adjustment device 100 and the control panel 200. The process shown in Figure 5 ends when the operator turns off the power to the coagulant 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 coagulant addition amount adjustment device 100 and closes the drain outlet automatic valve 105 in order to take in a portion of the turbid water after the coagulant has been added. As a result, the turbid water after the coagulant has been added flows into the coagulant addition amount adjustment device 100 from the raw water inlet 102 only when the raw water pump is in operation.

[0028] In step S20, the control device 203 determines whether or not overflow water has been detected by the overflow water sensing sensor 103. If the determination in step S20 is positive, the process proceeds to step S30. If an overflow occurs in the coagulant 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 between when the control device 203 controls the raw water inlet automatic valve 101 to close and when the raw water inlet automatic valve 101 actually closes is considered a waiting time.

[0030] In step S40, the control device 203 starts measurement using the laser sensor 108. In the coagulant addition amount adjustment device 100 in this embodiment, as described above, the laser sensor 108 is provided in a transparent measuring section 107 such as a glass tube or PVC pipe, and the turbid water passing through the transparent measuring section 107 can be measured by the laser sensor 108. Note that the measurement value of the laser sensor 108 is the amount of light received (%) relative to the amount of laser irradiation, so the amount of light received (%) changes depending on the degree of turbidity of the turbid water. For this reason, the coagulation floc sedimentation rate of the turbid water and the degree of turbidity of the supernatant water after the coagulation floc sedimentation can be determined based on the measurement value of the laser sensor 108. For example, using the laser sensor 108, measurement is possible when the amount of suspended solids (SS) is 100 or less.

[0031] In step S50, the control device 203 determines whether the measurement by the laser sensor 108 has finished. In this embodiment, the control device 203 determines that the measurement by the laser sensor 108 is finished when the measurement time calculated in the above-described preliminary preparation has elapsed since the start of the measurement by the laser sensor 108. Here, for example, the measurement by the laser sensor 108 is finished when 360 seconds have elapsed since the start of the measurement by the laser sensor 108. If the determination in step S50 is affirmative, the process proceeds to step S60.

[0032] In step S60, the control device 203 performs a process to adjust the amount of coagulant to be added to the turbid water based on the measurement results from the laser sensor 108 at the time the measurement is completed. In this embodiment, the measured value (%) from the laser sensor 108 is compared with a preset threshold value for judgment to determine whether the result is OK or NG. The threshold value for judgment will be described below.

[0033] In this embodiment, the relationship between the measured value of the laser sensor 108, i.e., the amount of light received (%) relative to the laser irradiation amount, and the amount of suspended solids SS (mg / L) is determined in advance. Figure 6 is a diagram showing an example of a graph illustrating the correlation between the measured value (%) of the laser sensor 108 and the amount of suspended solids SS (mg / L). In this embodiment, a threshold (%) for determining whether the judgment result for adjusting the amount of coagulant added is OK or NG is set in advance based on the correlation between the measured value (%) of the laser sensor 108 and the amount of suspended solids SS (mg / L) as shown in Figure 6. For example, if the amount of suspended solids SS, which is a general discharge standard, is set to 25 mg / L, the measured value of the laser sensor 108 that serves as the discharge standard is determined to be 46% based on the correlation between the measured value (%) of the laser sensor 108 and the amount of suspended solids SS (mg / L). In this embodiment, for example, 46% is set as the threshold for judgment, and the control device 203 determines the judgment result to be NG if the measured value of the laser sensor 108 is less than 46%. As a result, if the amount of suspended solids (SS) is greater than 25 mg / L, it is judged as NG. In addition, the control device 203 is set to a threshold so that if the measured value of the laser sensor 108 is 46% or higher, the result is judged as OK. As a result, if the amount of suspended solids (SS) is 25 mg / L or less, it is judged as OK.

[0034] If the judgment result is NG, the control device 203 controls the amount of coagulant added to the turbid water to increase by a predetermined amount. For example, it controls the amount of polymer coagulant added per liter of turbid water to increase by 1 mg. It also controls the amount of inorganic coagulant added per liter of turbid water to increase by 10 mg. On the other hand, if the judgment result is OK a predetermined number of times, for example, three times in a row, the control device 203 controls the amount of coagulant added to the turbid water to decrease by a predetermined amount. For example, it controls the amount of polymer coagulant added per liter of turbid water to decrease by 1 mg. It also controls the amount of inorganic coagulant added per liter of turbid water to decrease by 10 mg.

[0035] In step S70, the control device 203 opens the automatic drain valve 105. As a result, the turbid water taken into the coagulant addition amount adjustment device 100 is discharged from the drain outlet 106.

[0036] In step S80, the control device 203 waits until the next measurement begins. The waiting time until the next measurement begins 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 begins, and the control device 203 waits for 15 seconds before repeating the process from step S10. As mentioned above, the process ends when the operator turns off the power to the coagulant addition amount adjustment device 100 and the control panel 200.

[0037] As described above, the coagulant addition amount adjustment system 10 in this embodiment can automatically adjust the amount of coagulant added to the turbid water to treat the turbid water at the optimal addition rate. However, if the condition of the raw polluted water changes significantly, it may not be possible to maintain a dischargeable treated water turbidity within the initially set coagulant addition rate range. For this reason, in the coagulant addition amount adjustment system 10 in this embodiment, if a dischargeable turbidity cannot be obtained even after adjusting the amount of coagulant added a predetermined number of times, the control device 203 of the control panel 200 will light up an alarm lamp to notify the operator. The dischargeable turbidity can be set to, for example, a suspended solids (SS) of 25 mg / L, in accordance with the general discharge standards described above.

[0038] In this embodiment, the touch panel 201 of the control panel 200 displays an operation screen showing buttons for operating the coagulant addition amount adjustment device 100 and information indicating the operating status of the coagulant addition amount adjustment device 100. By operating the touch panel 201, the operator of the control panel 200 can operate the coagulant addition amount adjustment device 100 and check the operating status of the coagulant addition amount adjustment device 100.

[0039] For example, as shown in Figure 7, the control panel 200 is equipped with a touch panel 201, and the touch panel 201 displays an operation screen. When the control panel 203 determines that the conditions for the alarm lamp to light up have been met, it lights up the alarm lamp 7a on the operation screen displayed on the touch panel 201. As a result, when the on-site worker confirms that the alarm lamp 7a has lit up on the operation screen of the control panel 200, they can adjust the amount of flocculant added by operating the touch panel 201 to change the range of flocculant addition rates.

[0040] Furthermore, in this embodiment, the touch panel 301 of the remote control terminal 300 displays a remote control screen similar to the operation screen displayed on the touch panel 201 of the control panel 200. By operating the touch panel 301, the operator of the remote control terminal 300 can operate the coagulant addition amount adjustment device 100 or check the operating status of the coagulant addition amount adjustment device 100. Note that the technology for displaying a remote control 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 control terminal 300 located in a remote location, and for operating the control panel 200 by operating the remote control screen, is known and therefore will not be explained here.

[0041] For example, as shown in Figure 8, the touch panel 301 displays a remote control screen with the same content as the operation screen displayed on the touch panel 201 of the control panel 200. When the control panel 203 determines that the conditions for the alarm lamp to light up have been met, it lights up the alarm lamp 8a on the remote control screen displayed on the touch panel 301. As a result, a user of the remote control terminal 300, such as an operator in a remote location, can change the amount of coagulant added by operating the touch panel 301 when they confirm that the alarm lamp 8a has lit up on the operation screen of the remote control terminal 300.

[0042] Figure 9 shows an example of changing the amount of coagulant added. When the initial amount of coagulant added (coagulant addition rate range) is set as shown in Figure 9(A), if the alarm lamp lights up on the operation screen or remote control screen, the operator changes the amount of coagulant added on the operation screen or remote control screen as shown in Figure 9(B). This allows the operator to change the amount of inorganic coagulant and polymer coagulant added to the turbid water by operating the remote control terminal 300 from a remote location. Note that the example shown in Figure 9 is just one example, and the changes to the amount of coagulant added are not limited to this.

[0043] In this embodiment, the content displayed on the remote control screen shown on the touch panel 301 of the remote control terminal 300 and the content displayed on the operation screen shown on the touch panel 201 of the control panel 200 are identical. Therefore, a user of the remote control terminal 300, such as a worker in a remote location, can adjust the amount of flocculant added on the same screen as when operating the control panel 200 on-site.

[0044] When the user operates the touch panel 301 of the remote control terminal 300 and changes the amount of coagulant to be added, the control device 303 transmits the change in the amount of coagulant to be added to the control panel 200. In the control panel 200, when the amount of coagulant to be added is changed on the touch panel 301 of the remote control terminal 300, the control device 203 changes the amount of coagulant to be added to the turbid water based on the instructions from the remote control terminal 300. In this way, the control device 203 can change the amount of coagulant to be added based on the instructions from the remote control terminal 300 if the amount of coagulant to be added initially is not sufficient to obtain a dischargeable turbidity.

[0045] The number of times the amount of coagulant added, which is the condition for the alarm lamp to light up, is repeated, i.e., the number of times the amount of coagulant is increased or decreased (specified number of cycles for increasing or decreasing coagulant), can be arbitrarily set between 1 and 99 times. In this embodiment, for example, if a dischargeable turbidity cannot be obtained after performing the procedure 3 times, the alarm lamp will be lit.

[0046] Figure 10 is a flowchart showing the flow of the alarm lamp illumination process performed by the control panel 200 in this embodiment. The process shown in Figure 10 is executed by the control device 203 as a program that is activated when the above-mentioned conditions for illuminating the alarm lamp are met.

[0047] In step S110, the control device 203 illuminates an alarm lamp on the operation screen displayed on the touch panel 201 of the control panel 200, as described above. It also illuminates an alarm lamp on the remote control screen displayed on the touch panel 301 of the remote control terminal 300. After that, the process ends.

[0048] Figure 11 is a flowchart showing the processing flow performed by the remote control terminal 300 in this embodiment. The processing shown in Figure 11 is executed by the control device 303 as a program that is activated when the touch panel 301 is operated by the operator and the above-mentioned coagulant addition rate range is changed.

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

[0050] Figure 12 is a flowchart showing the flow of the additive amount change process performed by the control panel 200 in this embodiment. The process shown in Figure 12 is executed by the control device 203 as a program that is activated when the control device 203 receives an operation message from the remote control terminal 300 indicating that the coagulant addition rate range has been changed, and is instructed to change the amount of coagulant to be added.

[0051] In step S310, the control device 203 changes the amount of coagulant to be added to the turbid water based on instructions from the remote control terminal 300, as described above. After that, the process is terminated.

[0052] According to the embodiments described above, the following effects and advantages can be obtained. (1) The coagulant addition amount 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 adjusts the amount of coagulant to be added to the turbid water based on the measurement results from the laser sensor. If the turbidity cannot be obtained to discharge even after adjusting the amount of coagulant added a predetermined number of times, an alarm lamp is set to light up on the touch panel 301 of the remote operation terminal 300. This makes it possible to notify an operator in a remote location that the turbidity cannot be obtained to discharge even after adjusting the amount of coagulant added a predetermined number of times.

[0053] (2) In the remote control terminal 300, the control device 303 receives a change in the amount of coagulant to be added from the user and transmits the received change in the amount of coagulant to the control panel 200. This allows workers to remotely instruct a change in the amount of coagulant to be added to the turbid water, and the remote control terminal 300 can transmit the changed amount of coagulant to be added to the control panel 200.

[0054] (3) The control device 203 of the control panel 200 is configured to change the amount of coagulant added to the turbid water based on the changes made to the amount of coagulant added via the remote control terminal 300. This allows for arbitrary adjustment of the amount of coagulant added even in remote locations, enabling quick initial response and minimizing deterioration of treated water quality.

[0055] (4) An alarm lamp is also made to light up on the touch panel 201 of the control panel 200. This allows the operator of the control panel 200 to be notified that the turbidity level suitable for discharge cannot be obtained even after adjusting the amount of coagulant added a predetermined number of times.

[0056] (5) The display content of the touch panel 301 of the remote control terminal 300 and the display content of the touch panel 201 of the control panel 200 are identical. As a result, the operator of the remote control terminal 300 can operate the same operation screen as the control panel 200, allowing them to operate the remote control terminal 300 with a familiar feel.

[0057] (6) The predetermined number of times the amount of coagulant added, which is the condition for the alarm lamp to light up, is repeated can be set arbitrarily. This allows the operator to arbitrarily set the number of times that the alarm lamp will light up.

[0058] (7) The control device 203 compares the measured value from the laser sensor 108 with a preset threshold value to determine whether the result is OK or NG. If the result is NG, it controls the amount of coagulant added to the turbid water to increase by a predetermined amount. If the result is OK three times in a row, it controls the amount of coagulant added to the turbid water to decrease by a predetermined amount. This makes it possible to understand the settling rate of the coagulated flocs in the turbid water and the degree of turbidity of the supernatant water after the coagulated flocs have settled based on the measured value from the laser sensor 108, and to adjust the amount of coagulant added according to the settling rate of the coagulated flocs in the turbid water and the degree of turbidity of the supernatant water after the coagulated flocs have settled.

[0059] (8) The coagulant addition amount adjustment device 100 further includes a transparent measuring section 107 made of a transparent material, and the laser sensor 108 is configured to measure the turbid water passing through the transparent measuring section 107. This makes it possible to measure the supernatant water after the SS sedimentation of the turbid water via the transparent measuring section 107 without bringing the laser sensor 108 into contact with the turbid water.

[0060] (9) The measurement time by the laser sensor 108 is calculated in advance according to the coagulation and sedimentation rate of the wastewater treatment machine used. This improves the measurement accuracy of the laser sensor 108.

[0061] (10) The control device 203 opens the raw water inlet automatic valve 101 of the coagulant addition amount adjustment device 100 to take in a portion of the turbid water from the raw water inlet 102 and closes the drain outlet automatic valve 105. When overflow water is detected by the overflow water sensing sensor 103, the raw water inlet automatic valve 101 is closed again, and the device performs a process to adjust the amount of coagulant to be added to the turbid water based on the measurement results obtained by the laser sensor 108 until the measurement time has elapsed. After the measurement time has elapsed, the drain outlet automatic valve 105 is opened to drain the turbid water. This makes it possible to take in a portion of the turbid water from the raw water inlet 102 of the coagulant addition amount adjustment device 100, measure it with the laser sensor 108, and adjust the amount of coagulant to be added based on the measurement results.

[0062] (11) The control device 203 is configured to start the next measurement after a preset waiting time has elapsed following the opening of the automatic drain valve 105. This allows the next measurement to start only after waiting for the turbid water to be drained from the coagulant addition amount adjustment device 100.

[0063] —Revised Version— Furthermore, the flocculant addition amount adjustment system of the above-described embodiment can also be modified as follows. (1) In the embodiment described above, an example was described in which the control device 203 controls the amount of coagulant added to the turbid water to be reduced by a predetermined amount when the judgment result is OK three times in a row. However, the condition for controlling the amount of coagulant added to the turbid water to be reduced by a predetermined amount is not limited to when the judgment result is OK three times in a row. For example, the amount of coagulant added to the turbid water may be controlled to be reduced by a predetermined amount when the judgment result is OK once, or the amount of coagulant added to the turbid water may be reduced by a predetermined amount when the judgment result is OK multiple times in a row other than three times.

[0064] (2) In the above-described embodiment, an example was described in which the control device 203 controls the amount of coagulant added to the turbid water to be increased by a predetermined amount when the judgment result is NG. However, the condition for controlling the amount of coagulant added to the turbid water to be increased by a predetermined amount may be set to when the judgment result is NG for a predetermined number of consecutive times. For example, the amount of coagulant added to the turbid water may be increased by a predetermined amount when the judgment result is NG for two consecutive times.

[0065] (3) In the above-described embodiment, the coagulant addition amount adjustment device 100 shown in Figure 2 is used, and a portion of the turbid water after coagulant addition is taken into the coagulant addition amount adjustment device 100 and measured by the laser sensor 108, and the control device 203 of the control panel 200 adjusts the amount of coagulant added based on the measurement result from the laser sensor 108. However, the present invention is also applicable when using a known coagulant addition amount adjustment device that measures the turbid water with a raw water concentration (turbidity) meter, for example, an immersion type turbidimeter sensor, and adjusts the amount of coagulant added based on the measurement result from the immersion type turbidimeter sensor. That is, in a coagulant addition amount adjustment device that measures the turbid water with a raw water concentration (turbidity) meter and adjusts the amount of coagulant added based on the measurement result from the turbidimeter, the control device 203 of the control panel 200 may light up an alarm lamp to notify the operator if the turbidity that can be discharged cannot be obtained even after adjusting the amount of coagulant added.

[0066] A known method for adjusting the amount of coagulant added based on the measurement results from a turbidimeter is used, for example, as shown in Figure 13. In a known coagulant addition adjustment device using a turbidimeter, raw water and sediment are collected before the coagulant is added to the device, and 3 to 5 samples of test turbid water ranging from low to high turbidity are prepared. The optimal coagulant addition rate for each turbidity level is determined by a coagulation-sedimentation test, and these values ​​are input into the control panel to create a correlation graph between turbidity and addition rate. Based on the created correlation graph, the coagulant addition rate is changed while continuously measuring the turbidity using a turbidimeter in the "2. Raw Water Tank" where "1. Turbid water generated during construction, etc." is collected. The turbid water collected in "2. Raw Water Tank" is sent to the "6. Sedimentation Separation Tank" using the "3. Raw Water Pump". During this process, "4. Addition of coagulant to raw water" and "5. Mixing of coagulant and raw water" are performed. In "6. Sedimentation Separation Tank," the water is separated into "10. Sedimented Sludge" and "7. Separated Clean Water." The "10. Sedimented Sludge" is discharged to the outside in "11. Sludge Discharge." The "7. Separated Clean Water" is then transferred to "8. Treatment Tank," where its turbidity is measured using a turbidimeter. If the treated water turbidity is deemed suitable for discharge, it is discharged to the outside in "9. Discharge."

[0067] On the other hand, similar to the process described above, if the control device 203 of the control panel 200 cannot obtain a dischargeable turbidity even after adjusting the amount of coagulant added, it will illuminate the alarm lamp 7a on the touch panel 201 of the control panel and the alarm lamp 8a on the touch panel 301 of the remote control terminal 300. This allows the on-site worker to adjust the amount of coagulant added by operating the touch panel 201 when they confirm that the alarm lamp 7a is lit on the control panel 200's operation screen. Similarly, a user of the remote control terminal 300, such as a worker in a remote location, can change the amount of coagulant added by operating the touch panel 301 when they confirm that the alarm lamp 8a is lit on the remote control terminal 300's operation screen.

[0068] Furthermore, the present invention is not limited in any way to the configurations of the embodiments described above, as long as the characteristic functions of the present invention are not impaired. Configurations combining the above embodiments with several variations are also possible. [Explanation of symbols]

[0069] 10. Coagulant Addition Amount Adjustment System 100 Coagulant Addition Amount Adjustment Device 101 Raw water inlet automatic valve 102 Raw water inlet 103 Overflow water sensor 104 Overflow port 105 Automatic drain valve 106 Drain 107 Transparent measurement section 108 Laser Sensors 109 Top opening for cleaning 200 control panel 201 Touch Panel 202 Connection Interfaces 203 Control device 300 remote control terminals 301 Touch Panel 302 Communication Module 303 Control device

Claims

1. A coagulant addition amount adjustment system comprising a coagulant addition amount adjustment device for adjusting the amount of coagulant added to turbid water, a control panel for controlling the coagulant addition amount adjustment device, and a remote operation terminal connected to the control panel by a communication line, The aforementioned flocculant addition amount adjustment device is Equipped with a sensor to measure turbid water, The aforementioned control panel is An adjustment means for performing a process to adjust the amount of coagulant to be added to the turbid water based on the measurement results from the aforementioned sensor, A coagulant addition amount adjustment system characterized by comprising an alarm means that illuminates an alarm lamp on the screen of the remote control terminal if a dischargeable turbidity cannot be obtained even after adjusting the amount of coagulant added by the adjustment means.

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 illuminates an alarm lamp on the screen of the remote control terminal when the turbidity suitable for discharge cannot be obtained even after adjusting the amount of flocculant added by the adjustment means a predetermined number of times.

3. In the flocculant addition amount adjustment system according to claim 1 or 2, The aforementioned remote control terminal is A change request mechanism that accepts changes to the amount of flocculant added by the user, A coagulant addition amount adjustment system further comprising a transmission means for transmitting the changes to the coagulant received by the change receiving means to the control panel.

4. In the flocculant addition amount adjustment system according to claim 3, The aforementioned control panel is A coagulant addition amount adjustment system further comprising a means for changing the amount of coagulant added based on the changes made to the amount of coagulant added when the amount of coagulant added is changed via the remote control terminal.

5. In the flocculant addition amount adjustment system according to claim 1 or 2, The flocculant addition amount adjustment system is characterized in that the alarm means also illuminates an alarm lamp on the screen of the control panel.

6. In the flocculant addition amount adjustment system according to claim 5, A coagulant addition amount adjustment system characterized in that the content displayed on the operation screen shown on the remote control terminal and the content displayed on the operation screen shown on the control panel are identical.

7. In the flocculant addition amount adjustment system according to claim 2, A coagulant addition amount adjustment system characterized in that the predetermined number of times the amount of coagulant added is adjusted can be set arbitrarily.

8. In the flocculant addition amount adjustment system according to claim 1 or 2, The aforementioned sensor is a laser sensor, The adjustment means is characterized by comparing the measured value of the laser sensor with a preset threshold value to determine whether the result is OK or NG, controlling the amount of coagulant added to the turbid water to increase by a predetermined amount if the result is NG, and controlling the amount of coagulant added to the turbid water to decrease by a predetermined amount if the result is OK.

9. In the flocculant addition amount adjustment system according to claim 8, The adjustment means is characterized by controlling the amount of coagulant added to the turbid water to increase by a predetermined amount if the judgment result is NG for a predetermined number of consecutive times.

10. In the flocculant addition amount adjustment system according to claim 8, The adjustment means is characterized by controlling the amount of coagulant added to the turbid water to decrease by a predetermined amount when the judgment result is OK for a predetermined number of consecutive times.

11. In the flocculant addition amount adjustment system according to claim 8, The aforementioned flocculant addition amount adjustment device is It further includes a transparent measuring section made of transparent material, The flocculant addition amount adjustment system is characterized in that the laser sensor measures the turbid water passing through the transparent measuring section.

12. In the flocculant addition amount adjustment system according to claim 8, The coagulant addition amount adjustment system is characterized in that the measurement time by the laser sensor is calculated in advance according to the coagulation and sedimentation rate of the wastewater treatment machine used.

13. In the flocculant addition amount adjustment system according to claim 12, The adjustment means is characterized by opening the automatic valve of the raw water inlet of the coagulant addition amount adjustment device to take in a portion of the turbid water from the raw water inlet and closing the automatic valve of the drain outlet, closing the automatic valve of the raw water inlet when overflow water is detected by the overflow water sensing sensor, performing a process to adjust the amount of coagulant to be added to the turbid water based on the measurement results obtained by the laser sensor until the measurement time has elapsed, and opening the automatic valve of the drain outlet to drain the turbid water when the measurement time has elapsed.

14. In the flocculant addition amount adjustment system according to claim 13, The adjustment means is characterized in that, after opening the automatic drain valve, the next measurement is started after a predetermined waiting time has elapsed, thereby adjusting the amount of coagulant added.

Images