JP2008055290A - Operation support system of water treatment plant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operation support system capable of determining filtering capacity of a filter bed by monitoring clogging of filtering sand or amount of residual matter in the filter bed during operation. <P>SOLUTION: This operation support system is applied to a water treatment plant for monitoring clogging of filtering sand 122 provided in the filter bed 12 or amount of residual matter and determining filtering capacity of the filter bed 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an operation support system for a water treatment plant such as a water and sewage plant.

  Conventionally, for example, in a water purification plant such as a water supply plant, a filtration pond for filtering (filtering) treated water introduced from a water source is provided. This filtration pond is equipment for removing (filtering) unnecessary components contained in the treated water with the filter sand.

  By the way, the filtration sand adsorbs and filters suspended matters and unnecessary components in the treated water, so that the residue gradually increases and clogs, and the treated water becomes difficult to flow. For this reason, in operation support systems, such as a waterworks plant, the monitoring apparatus which monitors the clogging of the filtration sand in a filtration pond and determines the filtration processing capacity of a filtration pond appropriately is required.

Conventionally, for example, an abnormality monitoring device having a function of monitoring an abnormality of an electrical product and notifying the abnormality information that an abnormality occurs has been proposed (for example, see Patent Documents 1 to 3).
Japanese Patent Application Laid-Open No. 07-232187 Japanese Patent Laid-Open No. 07-290043 JP 07-319509 A

  In waterworks plants, etc., operation support that has the function of monitoring clogged sand and residue in the filtration basin and determining whether the level of clogging or residue exceeds the filtration capacity of the filtration basin. A system is needed.

  Accordingly, an object of the present invention is to provide an operation support system that can monitor the degree of filtration sand clogging and residue in the filtration basin and determine the filtration treatment capacity of the filtration basin during operation of the plant.

  An aspect of the present invention is an operation support system that monitors the degree of clogging and residue of filtration sand provided in a filtration basin and determines the filtration capacity of the filtration basin.

  An operation support system applied to a water treatment plant according to an aspect of the present invention is an operation support system applied to a water treatment plant that introduces water from a water source into a filtration pond and performs water treatment including filtration. Monitoring means for monitoring the behavior of the change in the loss head value, which is the difference between the pressure on the inflow side and the pressure on the outflow side of the filtration basin, and the filtration treatment of the filtration basin based on the change in the loss head value by the monitoring means It is the structure provided with the determination means which determines capability.

  ADVANTAGE OF THE INVENTION According to this invention, the driving | operation assistance system which can monitor the filtration clogging capacity of a filtration pond can be provided by monitoring the degree of clogging of the filtration sand and the residue in a filtration pond during operation of a plant.

  Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment]
Hereinafter, an operation support system for a water treatment plant according to the first embodiment will be described with reference to FIGS. 1 to 7.

(Configuration of water treatment plant)
This embodiment demonstrates a waterworks plant as a water treatment plant. FIG. 1 is a diagram for explaining a water purification process of a waterworks plant. In addition, also in other embodiment mentioned later, the waterworks plant shown in FIG. 1 is assumed.

  The water supply plant introduces raw water from, for example, the dam 1 or the river 30 as a water source (hereinafter sometimes referred to as a reservoir). The raw water from the reservoir 1 is led to the landing well 5 through the pipe 6. The pipe 6 is provided with a flow meter 2 and a flow control valve 3. The flow rate adjustment valve 3 is opened and closed by the operation of the actuator 4 to adjust the flow rate of water flow. In FIG. 1, “X” means various sensors such as a flow meter, and “M” means a driving unit such as an actuator or a motor.

  On the other hand, raw water from the river 30 is led to a sand basin 32 having an on-off valve 31. The sand basin 32 is provided with a screen 33, and the introduced raw water is filtered (filtered). Further, water is introduced from the pump well 34 to the landing well 5 by the water introduction pump 35. The pipe connecting the pump well 34 and the landing well 5 is provided with a flow control valve 36 and a flow meter 37.

  The water introduced to the landing well 5 is sent to the settling basin 11. A mixing basin 9 and a floc-forming basin 10 are arranged in the preceding stage of the settling basin 11. A flow meter 7 and a flow rate control valve 8 are provided in the pipe connecting the landing well 5 and the mixing basin 9.

  On the other hand, the return water from the settling basin 11 is introduced into the landing well 5. The return water from the settling basin 11 is sent to the sludge basin 39 after the flow rate is adjusted by the flow rate control valve 38. Further, the return water is sent from the sludge basin 39 to a drainage basin (sewage pond) 40 and returned from the drainage basin 40 to the receiving well 5 by a return pump 41. In the sludge pond 39, the sludge is dehydrated and disposed of. The pipe connecting the landing well 5 and the drainage basin 40 is provided with a flow control valve 42 and a flow meter 43.

  Next, the water guided to the settling basin 11 is filtered by the filter basin (filter pond) 12 and then sent to the washing water tank (clean water pond) 13. Flow pipes 50 and 52 and a flow meter 51 are provided on the piping connecting the filtration pond 12 and the washing water tank 13. From the upper surface of the water introduced into the washing water tank 13, the water is returned to the filtration pond 12 by the surface washing pump 46. Flow control valves 47 to 49 are provided in the piping connecting the front washing pump 46 and the filtration pond 12.

  Further, in the washing water tank 13, a part of the water guided by the backflow pump 53 is returned to the filtration pond 12. A flow meter 54 and flow rate control valves 55 and 56 are provided on the pipe connecting the backflow pump 53 and the filtration pond 12. In the filtration basin 12, part of the introduced water is returned to the drainage basin 40 via the flow rate control valve 44. A part of the water returned to the filter basin 12 by the backflow pump 53 is returned to the drainage basin 40 via the flow rate control valve 45.

  The water purified by the washing water tank 13 is sent to the distribution reservoir 16 via the pipe 23 by the water pump 20. The pipe 23 is provided with flow control valves (or discharge valves) 15 and 21 and a flow meter 22. The distribution reservoir 16 is provided with a water level meter 17 and a water quality sensor 18 for measuring the water level. The purified water from the distribution reservoir 16 is distributed by being controlled by the flow control valve 19. On the other hand, the water purified by the washing water tank 13 is distributed by the water distribution pump 24 via the pipe 27. The pipe 27 is provided with a flow rate control valve (or discharge valve) 25 and a flow meter 26.

  As such an operation support system for a water supply plant, a controller 100 having a computer as a main element is provided. The controller 100 inputs measurement signals from various sensor groups and detects the flow rate, water level, sludge amount, water quality, and the like, and controls the flow rate control valve and the pump.

(Driving support system)
FIG. 2 is a diagram illustrating a filtration process according to the present embodiment.

  As shown in FIG. 2, the filtration process is a process in which treated water (water introduced from a water source such as a dam) is introduced from the sedimentation basin 11 to the filtration basin 12 through the water distribution pipe 110. Filter sand 12 is disposed in the filter basin 12, and the treated water flows from the inflow side of the filter pond 12 to the outflow side through the filter sand 122 and is sent to the next treatment process. .

  In the filtration process, the treated water is filtered while passing through the filtration sand 122 and is sent to the next treatment process through the water distribution pipe 121. In addition, the filtration pond 12 is provided with a loss hydrometer 123 that outputs the difference between the pressure on the inflow side and the pressure on the outflow side of the filter sand 122 as the loss pressure of the filter sand 122. The loss hydrometer 123 measures the differential pressure before and after the filter sand 122 and outputs the measured value to the controller 100 of the driving support system.

  In such a filtration process, in the process in which the treated water passes through the filtered sand 122, the filtered sand 122 adsorbs and filters the suspended matter and unnecessary components in the treated water. Causes clogging. For this reason, it becomes difficult for the treated water to flow, and the pressure difference (differential pressure) between the inflow side and the outflow side of the filtered sand 122 increases. The loss hydrometer 123 measures the differential pressure.

  The controller 100 monitors the measurement value of the loss head total 6 to quantitatively grasp the degree of clogging of the filter sand 122 or the residue. Thereby, the driving support system can perform appropriate operation management of the filtration pond 12 in the water supply plant.

(Determination of cleaning process and filter sand)
FIG. 3 is a diagram showing a cleaning process according to the present embodiment.

  In the cleaning process, as shown in FIG. 3, a cleaning facility for cleaning the filter sand 122 is used in order to eliminate clogging of the filter sand 122 in the filter basin 12 and the removal of the residue. This washing facility is installed as an incidental facility for the filter pond 12.

  The washing process is a combination of a surface washing process for washing the inflow side surface of the filter sand 122 and a back washing process. The backwash process is a process for washing the filter sand 122 by applying pressure from the outflow side of the filter sand 122 and passing the wash water in the direction opposite to the flow of normal treated water.

  In the surface washing process, the washing water from the washing water tank 13 is pressurized by the surface washing pump 46 and sprayed by the washing nozzle 120 to the inflow side of the filtration sand 122 which is the surface of the filtration pond 12. On the other hand, in the backwash process, the wash water from the wash water tank 13 is pressurized by the backwash pump 53 and supplied to the filter sand 122 of the filter basin 12 through the discharge valve 56. That is, in the backwash process, wash water is supplied in the reverse direction from the outflow side of the filter sand 122. By this back washing process, sludge and unnecessary components that are discharged to the inflow side of the filtered sand 122 or accumulated are washed away.

  At this time, in order to prevent the washing water from flowing to the next treatment process via the water distribution pipe 121, the flow rate control valve 50 is closed during the back washing process. Further, during normal water purification treatment, the discharge valve 56 of the backwash pump 53 is closed and the flow rate adjustment valve 50 is opened so that the treated water does not flow back to the backwash pump 53.

  Sludge such as suspended matter contained in the filtered sand 122 cleaned by the surface washing process or the backwashing process is sent to the drainage basin 40 through the drainage pipe 124. Further, the washed water after washing is also sent to the drainage basin 40 through the drainage pipe 124.

  FIG. 4 is a diagram showing a temporal change in the loss head value, which is a measurement value of the loss head total 6, and a change in the loss head value after the cleaning is performed by the cleaning process.

  When the loss water head value reaches the upper limit value based on the measurement value of the loss water head meter 6, the controller 100 executes the cleaning process. Thereby, as shown in FIG. 4, a loss head value falls. When the filtration process is resumed after the cleaning, the loss head value of the filtration pond 12 gradually increases with time. When the loss head value reaches the upper limit again, the controller 100 causes the filter sand 122 to be washed again. The cleaning execution cycle T is not constant, and is the same as the interval at which the loss head value reaches the upper limit value.

  FIG. 5 is a diagram showing the relationship between the number of times the filtration basin 12 is cleaned and the cleaning execution cycle T.

  As shown in FIG. 5, normally, the cleaning execution period T of the filter basin 12 gradually decreases as the number of cleanings increases. This is because the filtration sand 122 is temporarily cleaned by the execution of the cleaning process, but the filtration sand 122 is likely to be clogged due to accumulated fouling, and therefore the time until the loss head value reaches the upper limit is shortened. Means.

  That is, the cleaning effect by the cleaning process is reduced. In order to restore the cleaning effect, it is necessary to perform maintenance such as removing the filter sand 122 from the filter basin 12 and removing accumulated dirt. However, since this requires a lot of labor, it is necessary to perform it appropriately as necessary. Therefore, by monitoring the cleaning execution cycle T and its change trend, the controller 100 can determine the filtration processing capability (soundness level) of the filtered sand 122. In addition, the determination result makes it possible to determine whether the filtered sand should be taken out and maintenance should be performed or only cleaning should be performed.

  FIG. 6 is a diagram showing the change over time in the loss head value of the filtration pond 12.

  As shown in FIG. 6, the loss head value immediately after the execution of the cleaning process is small because the pressure loss in the filter sand 122 is small. When the filtration process is resumed after the cleaning process is performed, suspended substances floating in the treated water gradually accumulate on the filtered sand 122, and thus the loss head value gradually increases with time.

  When the loss head value reaches the upper limit again, the controller 100 causes the filter sand 122 to be washed again. Even if the amount of treated water is constant, the time variation of the loss head does not change linearly, and typically, as shown in FIG. Therefore, as shown in the figure, the loss head change amount (Δp / Δt) per unit time can be calculated from the ratio of the loss head value Δp changed during the time interval Δt.

  Here, normally, the loss head change amount gradually increases. However, when the quality of the treated water rapidly deteriorates and the amount of suspended solids increases rapidly, the filtration sand 122 is blocked, and the loss head change amount increases rapidly. Become. For this reason, the controller 100 detects the deterioration of the water quality and the blockage of the filtered sand 122 by monitoring the amount of change in head loss.

  In addition, if the sand sand 122 becomes non-uniform after the cleaning process, particularly after the back-washing process, the filtering process may not be performed normally, and the loss head value may not increase normally. By monitoring the amount of change in the loss head immediately after the end, it is possible to detect a failure of the filter sand.

  FIG. 7 is a diagram showing a change over time in the loss head value immediately after the filtration treatment of the filtration pond 12. The solid line in the figure shows the time variation of the loss head value immediately after the cleaning process.

  As indicated by the alternate long and short dash line in FIG. 7, when the loss head value gradually increases and reaches the upper limit value, the controller 100 causes the filter sand 122 to be washed. This reduces the loss head value. Here, although the loss head value is decreased by the cleaning treatment, it does not become the loss head value immediately after the previous cleaning, but is somewhat larger. This is because the suspended matter trapped in the filter sand 122 by the cleaning process is not completely removed and remains somewhat, so that a pressure loss occurs, and the head loss value is not completely restored.

  When the filtration process is resumed after the cleaning process, the loss head value of the filtration pond 12 gradually increases with time. When the loss head value reaches the upper limit again, the controller 100 causes the filter sand 122 to be washed. In this case as well, the loss head value decreases due to the cleaning treatment, but does not become the loss head value immediately after the previous cleaning, and is somewhat larger. Therefore, the loss head value immediately after the cleaning process gradually increases as shown by the solid line in FIG.

  As described above, the controller 100 can grasp the amount of suspended matter remaining in the filter sand 122 by monitoring the change tendency of the loss head value immediately after the cleaning process. In addition, when the degree of recovery of the loss head value is reduced, the cleaning treatment of the filter basin 12 must be executed in a short cycle, and washing water and waste water treatment after washing are frequently required. That is, it means that the effect of the cleaning process is reduced. In this case, it is necessary to perform maintenance requiring a great amount of labor such as removing the accumulated sand by removing the accumulated sand 122 from the filtration basin 12, but the tendency of the loss head value to change immediately after the cleaning process is monitored. Therefore, this maintenance can be performed properly.

[Second Embodiment]
FIG. 8 is a diagram illustrating a filtration process according to the present embodiment.

  As shown in FIG. 8, the filtration process is a process in which treated water is introduced from the sedimentation basin 11 to the filtration basin 12 through the water distribution pipe 110. Filter sand 122 is arranged in the filter basin 12, and the treated water passes through the filter sand 122 from the inflow side of the filter pond 12 and is sent to the next treatment process through the water distribution pipe 121.

  A flow meter 51 is installed in the water distribution pipe 121. The flow meter 51 measures the amount of treated water flowing through the water distribution pipe 121 and outputs it to the controller 100. When the amount of water per unit time of the flow meter 51 is divided by the cross-sectional area of the filter sand 122 of the filter pond 12, the speed of the treated water passing through the filter sand 122 can be obtained. Here, the speed of this treated water is called a filtration speed, and can be used as an index for determining the filtration treatment capacity (soundness) of the filtration pond 12 as with the loss head value.

  FIG. 9 is a diagram illustrating a relationship between a change in filtration rate with time and a change in filtration rate after the execution of the cleaning process.

  When the filtration speed reaches the lower limit value, the controller 100 causes the filtration sand 122 to be washed. By performing this cleaning process, the filtration rate increases. When the filtration process is resumed after the cleaning process is executed, the filtration rate of the filtration basin 12 gradually decreases with time. When the filtration rate reaches the lower limit again, the controller 100 causes the filtration sand 122 to be washed. The cleaning execution cycle T is not constant and is the same as the interval at which the filtration rate reaches the lower limit value.

  FIG. 10 is a diagram showing the change over time of the filtration rate of the filtration basin 12.

  As shown in FIG. 10, the filtration rate immediately after the execution of the cleaning treatment is large because the pressure loss in the filtration sand 122 is small and the treated water flows easily. When the filtration process is resumed after the cleaning process is performed, the suspended matter floating in the treated water gradually accumulates on the filtration sand 122, so the filtration rate gradually decreases with time. When the filtration rate reaches the lower limit again, the controller 100 causes the filtration sand 122 to be washed.

  The time change of the filtration speed does not change linearly, and typically, as shown in FIG. Therefore, as shown in the figure, the amount of change in filtration rate per unit time (Δs / Δt) can be calculated from the ratio of the filtration rate Δs changed during the time interval Δt.

  Here, normally, the amount of change in the filtration rate is gradually increased. However, when the quality of the treated water is rapidly deteriorated and the amount of suspended matter is rapidly increased, the filtration sand 122 is blocked, and the amount of change in the filtration rate is abrupt. Become bigger. For this reason, the controller 100 detects the deterioration of water quality or the blockage of the filtered sand 122 by monitoring the amount of change in the filtration speed.

  In addition, if the sand sand 122 becomes non-uniform after the cleaning process, especially after the back-washing process, the filtering process may not be performed normally, and the filtration rate may be higher than before the cleaning process. By monitoring the filtration rate immediately after the end of the cleaning, it is possible to detect a failure of the filtration sand 122.

  FIG. 11 is a diagram showing the change over time of the filtration rate immediately after the washing treatment of the filtration pond 122.

  The solid line in the figure shows the change over time in the filtration rate immediately after the cleaning treatment. As indicated by the alternate long and short dash line in FIG. 11, when the filtration rate gradually decreases and reaches the lower limit value, the controller 100 causes the filtration sand 122 to be washed. Thereby, the filtration speed is restored. Here, although the filtration rate is increased by the washing treatment, it does not become the filtration rate immediately after the previous washing, but is somewhat smaller. This is because the suspended matter trapped in the filter sand 122 by the cleaning process is not completely removed but remains somewhat, so that a pressure loss occurs, and the filtration rate is not completely restored.

  When the filtration process is resumed after the washing process is executed, the filtration rate of the filtration basin 12 gradually decreases with time. When the filtration rate reaches the lower limit again, the controller 100 causes the filtration sand 122 to be washed. In this case as well, the filtration rate increases due to the cleaning treatment, but does not become the filtration rate immediately after the previous washing treatment, and is somewhat smaller. Therefore, the filtration rate immediately after washing gradually decreases as shown by the solid line in FIG.

  As described above, the controller 100 can grasp the amount of suspended matter remaining in the filter sand 122 by monitoring the change tendency of the filtration rate immediately after the cleaning process. In addition, when the recovery rate of the filtration rate is reduced, the cleaning treatment of the filtration basin 12 must be executed in a short cycle, and the washing water and the waste water treatment after the washing are frequently required. That is, it means that the effect of the cleaning process is reduced. In this case, it is necessary to perform maintenance requiring a great amount of labor such as removing the accumulated sand by removing the filtration sand 122 from the filtration pond 12, but by monitoring the change tendency of the filtration rate immediately after washing, This maintenance can be performed properly.

[Third Embodiment]
FIG. 12 is a diagram showing the time change of the water level in the washing water tank 13.

  In the above-described cleaning process, cleaning water for cleaning the filter sand 122 is supplied from the cleaning water tank 13. As shown in FIG. 1, a pipe for supplying cleaning water is connected to the cleaning water tank 13, and the cleaning water is supplied from the cleaning water tank 9 to the filtration basin 12 through the piping at a constant speed. .

  As shown in FIG. 12, the water level of the washing water tank 13 rises at a constant speed. In order to wash the filtration sand 122 of the filtration pond 12, a certain amount of water is required. The dotted line described in FIG. 12 indicates the water level at which the amount of water that can be washed by the filter basin 12 is secured. The lower dotted line in FIG. 12 indicates the water level at which the amount of water that can wash the filtration basin 12 once is secured. The upper dotted line in FIG. 12 indicates the water level at which the amount of water that can wash the filtration basin 12 twice or two filtration basins 12 at the same time is secured.

  As described above, when the loss head value of the filtration basin 12 reaches the upper limit or when the filtration speed reaches the lower limit, the filtration pond 12 (actually the filtration sand 122) needs to be washed. However, if the amount of water in the washing water tank 13 does not satisfy the water level that can be washed by one pond (lower dotted line), washing cannot be performed. Therefore, the controller 100 outputs guidance indicating that the required amount of water in the cleaning water tank 13 is not ensured in response to the execution request for the cleaning process. Thereby, it becomes possible to prevent the cleaning process of the filter basin 12 from being performed incompletely due to a shortage of water.

  Further, as shown in FIG. 12, the water level increase rate (Δh / Δt) per unit time is calculated from the ratio of the water level Δh changed during the time interval Δt, and the cleaning process can be performed from the current water level of the cleaning water tank 13. By dividing the difference between the water levels by the water level increase rate, the time during which the cleaning process can be performed can be calculated. The controller 100 can assist the operation of the cleaning process of the filter basin 12 by outputting guidance to the operator of the waiting time during which the cleaning process is possible.

[Fourth Embodiment]
FIG. 13 is a diagram showing the time change of the water level of the drainage basin 40 shown in FIG.

  As shown in FIG. 3, the washing waste water after washing the filtration sand 122 of the filtration pond 12 flows into the drain basin 40 through the drain pipe 124. Moreover, as shown in FIG. 1, the drainage basin 40 is connected to a pipe for sending wastewater to a process for treating the wastewater, so that the wastewater flows out at a constant speed.

  As shown in FIG. 13, when the drainage does not flow into the drainage basin 40 from the drainage pipe 124, the water level of the drainage basin 40 descends at a constant speed. In order to wash the filtration sand 122 of the filtration pond 12, a certain amount of water is necessary, and a certain amount of the washing waste water accompanying this washing treatment is discharged.

  A dotted line shown in FIG. 13 indicates a water level at which the drainage from the filtration basin 12 is received by the drainage basin 40. If the washing process of the filtration basin 12 is executed before the water level falls below, the drainage basin 40 overflows, and the washing process cannot be executed. Here, when the loss head value of the filtration basin 12 reaches the upper limit, or when the filtration speed reaches the lower limit, it is necessary to perform the washing treatment of the filtration pond 12. However, if the water level of the drainage basin 40 does not fall below the water level that can be washed by one pond indicated by the dotted line in FIG. 13, the cleaning process cannot be executed.

  Therefore, the controller 100 outputs guidance indicating that the capacity for receiving wastewater in the drainage basin 40 is not ensured in response to the execution request for the cleaning process. Accordingly, it is possible to prevent a situation in which the drainage basin 40 overflows due to the drainage capacity shortage and the cleaning treatment of the filtration pond 12.

  Further, as shown in FIG. 13, the water level decrease rate (Δh / Δt) per unit time is calculated from the ratio of the water level Δh changed during the time interval Δt, and the drainage is accepted from the current water level of the drainage basin 40. By dividing the difference in possible water levels by the water level reduction rate, the time during which the cleaning process can be performed can be calculated. The controller 100 can assist the operation of the cleaning process of the filter basin 12 by outputting guidance to the operator of the waiting time during which the cleaning process is possible.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The figure which shows the structure of the waterworks plant regarding the 1st Embodiment of this invention. The figure which shows the filtration process regarding this embodiment. The figure which shows the washing | cleaning process regarding this embodiment. The figure which shows the relationship between the washing process regarding this embodiment, and the change of a loss head value. The figure which shows the relationship between the frequency | count of washing | cleaning regarding this embodiment, and a cleaning execution period. The figure which shows the time change of the loss head value regarding this embodiment. The figure which shows the time change of the loss head value immediately after the washing process regarding this embodiment. The figure which shows the filtration process regarding 2nd Embodiment. The figure which shows the relationship between the washing process regarding 2nd Embodiment, and the time change of the filtration rate. The figure which shows the time change of the filtration speed regarding 2nd Embodiment. The figure which shows the time change of the filtration rate immediately after the washing process regarding 2nd Embodiment. The figure which shows the time change of the water level of the washing water tank regarding 3rd Embodiment. The figure which shows the time change of the water level of the drainage basin regarding 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Reservoir (dam), 2 ... Flow meter, 3, 15 ... Flow control valve, 4, 14 ... Actuator 5 ... Irrigation well, 6, 23, 27 ... Piping, 9 ... Mixing pond, 10 ... Flock formation pond,
DESCRIPTION OF SYMBOLS 11 ... Sedimentation basin, 12 ... Filtration pond, 13 ... Washing water tank (clean water pond), 16 ... Distribution pond,
17 ... Water level gauge, 30 ... Reservoir (river), 32 ... Sedimentation basin, 34 ... Pump well,
40 ... Drainage basin (sewage pond), 46 ... Front wash pump, 50 ... Flow control valve, 51 ... Flow meter,
53 ... Backwash pump, 56 ... Discharge valve, 100 ... Controller, 110 ... Water pipe,
120 ... Front wash nozzle 121 ... Piping 122 ... Filter sand 123 ... Loss head
124 ... Drain pipe.

Claims (14)

In an operation support system applied to a water treatment plant that introduces water from a water source into a filtration pond and performs water treatment including filtration,
Monitoring means for monitoring the behavior of the change in the loss head value, which is the difference between the pressure on the inflow side and the pressure on the outflow side of the filtration basin;
A driving support system comprising: a determination unit that determines a filtration processing capacity of the filtration basin based on a change in the loss head value detected by the monitoring unit. The determination means includes
Quantitatively detecting the degree of clogging or residue of the filtration sand provided in the filtration basin based on the change in the loss head value, and determining the filtration treatment capacity of the filtration sand based on the detection result The driving support system according to claim 1. The monitoring means includes
As the behavior of the change of the loss head value, the change of the period until the loss head value reaches a preset upper limit value after the completion of the washing of the filter sand provided in the filtration pond is monitored. The driving support system according to any one of claims 1 and 2. The monitoring means includes
The driving support system according to any one of claims 1 and 2, wherein a change amount per unit time of the loss head value of the filtration pond is monitored as a behavior of the change of the head loss value. . The monitoring means includes
The change tendency of the loss head value immediately after the end of washing of the filter sand provided in the filtration basin is monitored as the behavior of the change of the loss head value. The driving support system described in 1. In an operation support system applied to a water treatment plant that introduces water from a water source into a filtration pond and performs water treatment including filtration,
Monitoring means for monitoring the behavior of the change in filtration rate calculated based on the amount of filtered water per unit time of the filtration basin and the cross-sectional area of the filtration basin;
A driving support system, comprising: a determination unit that determines a filtration processing capacity of the filtration basin based on a change in the filtration rate detected by the monitoring unit. The determination means includes
Based on the change in the filtration speed, quantitatively detecting the degree of clogging or residue of the filtration sand provided in the filtration pond, and determining the filtration processing capacity of the filtration sand based on the detection result. The driving support system according to claim 6, wherein The monitoring means includes
The change in the filtration rate is monitored by monitoring a change in a period from when the filtration sand provided in the filtration pond is washed until the filtration rate reaches a preset lower limit value. Or the driving assistance system of any one of Claim 7. The monitoring means includes
The driving support system according to claim 6, wherein a change amount per unit time of the filtration rate of the filtration pond is monitored as the behavior of the change in the filtration rate. The monitoring means includes
The change tendency of the filtration rate immediately after completion | finish of washing | cleaning of the filtration sand provided in the said filtration basin is monitored as a change behavior of the said filtration rate, Either of Claim 6 or Claim 7 characterized by the above-mentioned. Driving support system. In an operation support system applied to a water treatment plant that introduces water from a water source into a filtration pond and performs water treatment including filtration,
It is calculated based on the behavior of the change in the loss head value, which is the difference between the pressure on the inflow side and the pressure on the outflow side of the filter basin, or the amount of filtered water per unit time of the filter basin and the cross-sectional area of the filter basin. Monitoring means for monitoring the behavior of changes in filtration rate;
Based on the head loss value or the filtration speed detected by the monitoring means, the amount of washing water necessary for the washing treatment of the filtration basin is secured in the washing water tank when the washing treatment of the filtration pond is to be executed. Determining means for determining whether or not
A driving support system comprising: a cleaning support unit that outputs guidance indicating whether or not the filtration basin can be cleaned based on a determination result of the determination unit. The cleaning support means includes
When the required amount of cleaning water is not secured in the cleaning water tank, guidance for waiting time until the cleaning process becomes possible is output based on the rate of increase in the water volume of the cleaning water tank. The driving support system according to claim 11. In a water treatment plant having a drainage basin that receives the washing wastewater accompanying the washing treatment of the filtration pond,
The cleaning support means determines whether or not the capacity of the drainage pond is sufficient, and outputs guidance indicating whether or not the filtration basin can be cleaned based on the determination result. The driving support system according to any one of claims 11 and 12. The cleaning support means includes
The driving support system according to claim 13, wherein when the capacity of the drainage pond is insufficient, guidance for a waiting time until the cleaning process becomes possible is output from a rate of decrease in the amount of water in the drainage basin. .

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