JP2018111977A - Monitoring controller of sewerage facility and operation control method of sewage pump station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring controller of a sewerage facility expandable to a wider control range in cooperation with not only a sewage pump station but also other related facilities, and an operation control method of the sewage pump station.SOLUTION: A monitoring controller 1 of a sewerage facility having multiple sewage pump stations 2a, 2b, 2n connected to a sewer 4a and sending sewage flowing from the sewer 4a to a sewage treating plant 3 and/or a discharge destination 7, comprises at least a risk calculation part 13 calculating a pollution load risk index on the basis of the pollution load from one sewage pump station 2a being a control target and the sewage treating plant 3 cooperating with the one sewage pump station 2a to the discharge destination, and a pump discharge amount calculation part 14 calculating the discharge amount of the pump installed in the one sewage pump station 2a with the minimum pollution load risk index, and controls the one sewage pump station 2a based on the pump discharge amount calculated by the pump discharge amount calculation part 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a monitoring control device for a sewerage facility and an operation control method for a sewage pumping station, and in particular, a pump installed in a sewage pumping station in a combined sewerage system in which rainwater flows in and increases the sewage flow rate in rainy weather. The present invention relates to a monitoring control device for sewerage facilities that can be preferably started and stopped, and an operation control method for a sewage pump station.

Sewerage systems that are widely introduced in Japan and overseas are broadly divided into merged sewerage systems and split sewerage systems from the viewpoint of responding to rainwater. A rainwater drainage line connected to a sewage collection line is called a merging type, and a stormwater drainage line that is not connected and is drained by another line is called a shunting type. In the case of Japan, the former merging ceremony has been introduced mainly in large urban areas where sewerage infrastructure development has been carried out in advance. The feature of the combined sewer system is that the amount of sewage flowing into the sewage treatment plant greatly increases during rainy weather because rainwater is mixed into the sewage.
In order to cope with such an increase in the amount of inflow sewage during rainy weather, a sewage pumping station is installed as an intermediate facility upstream of the sewage treatment plant, and the inflow sewage is smoothly sent to the sewage treatment plant. It is common practice to remove a part of the water into a public water area such as a river without flowing it into a sewage treatment plant. Attempts have been made to avoid the following events by appropriately performing pump control and the like at the sewage pump station. In other words, events such as (1) inundation of sewage treatment areas (inland flooding), (2) poor sewage treatment, (3) water pollution in public water areas due to simple discharge, and (4) inundation of sewage pumping stations, etc. Avoidance or mitigation is a goal in pump control.

If the drainage of the rainwater that falls in the sewage treatment area (the amount of intercepted water) is not sufficient, rainwater will overflow from manholes and cause inundation. Moreover, when the water supply (sewage treatment amount) to a sewage treatment plant becomes excessive, the processing time in a biological reaction tank cannot be ensured, but it becomes a processing failure and the quality of processing water deteriorates. On the other hand, if the amount of untreated sewage discharge (simple discharge flow) to the public water area is increased too much in order to avoid inundation and poor treatment, the pollution load to the public water area will increase. Moreover, if the pump discharge amount is not sufficient compared with the inflow sewage amount, the water level of the pump well will rise and the sewage pump station will be submerged.
If the facility capacity of the sewage pumping station is not sufficient for the increasing inflow sewage volume, there may be cases where the above events (1) to (4) cannot be avoided. Measures have been made to avoid as much as possible.
For example, in Patent Document 1, based on the water level measurement value and the predicted value at a predetermined location in the sewer pipe and the prediction result of the amount of sewage flowing into the sewage pump station, the water level at the predetermined location in the sewer pipe Discloses a method for determining the start and stop of the pump and the discharge amount of the pump so as not to exceed the inundation risk level. According to this method, the inundation of the sewage treatment area can be avoided as much as possible within the facility capacity of the sewage pumping station.

JP 2003-239372 A

In the combined sewer system in rainy weather, rainwater derived from rainfall flows into the sewer pipe in addition to the sewage discharged from the treatment area, so the inundation of the treatment area, poor sewage treatment, water pollution due to simple discharge, and The risk of submersion of the sewage pumping station increases.
However, in the configuration of Patent Document 1, the target of operation control for avoiding the risk as described above is only the pump start / stop of the corresponding sewage pump station and the pump discharge amount. It will be limited only to the range of installed pump performance. In other words, since the target of operation control is limited to only one sewage pump station, there may be cases where risk is difficult to avoid.
Accordingly, the present invention provides a monitoring control device for sewerage facilities and an operation control method for a sewage pump station that can be expanded to a wider control range in cooperation with not only the sewage pump station but also related facilities other than the sewage pump station. provide.

In order to solve the above-mentioned problems, a monitoring and control apparatus for sewerage facilities according to the present invention includes a plurality of sewage pumps connected to a sewage pipe dredger to feed sewage flowing from the sewage pipe dredger to a sewage treatment plant and / or a discharge destination. A monitoring and control device for sewerage facilities having a sewage plant, wherein the monitoring and control device includes at least one sewage pumping station to be controlled and a pollutant load from a sewage treatment plant linked to the one sewage pumping plant to a discharge destination. A risk calculation unit for calculating a pollution load risk index based on the above, and a pump discharge amount calculation unit for obtaining a discharge amount of a pump installed in the one sewage pump station where the pollution load risk index is minimized, The one sewage pumping station is controlled based on a pump discharge amount obtained by the pump discharge amount calculation unit.
The operation control method of the sewage pumping station according to the present invention is an operation control of a plurality of sewage pumping stations connected to a sewage pipe dredger and supplying sewage flowing from the sewage pipe dredger to a sewage treatment plant and / or a discharge destination. A method for calculating a pollution load risk index based on a pollution load from at least one sewage pump station to be controlled and a sewage treatment plant linked to the one sewage pump station to a discharge destination, and the pollution load risk A discharge amount of a pump installed in the one sewage pumping station having a minimum index is obtained, and the one sewage pumping station is controlled based on the obtained discharge amount of the pump.

According to the present invention, there is provided a monitoring control device for sewerage facilities and an operation control method for a sewage pump station that can be expanded to a wider control range in cooperation with not only the sewage pump station but also related facilities other than the sewage pump station. It becomes possible to provide.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole schematic block diagram of the sewer installation and monitoring control apparatus which concern on one Example of this invention. It is a functional block diagram of the monitoring control apparatus shown in FIG. It is a schematic block diagram of one sewage pump station shown in FIG. It is a figure explaining the outline of a sewage pump station. It is a figure explaining the processing flow of the risk calculation part which comprises the monitoring control apparatus shown in FIG. It is a figure explaining the processing flow of the pump discharge amount calculating part which comprises the monitoring control apparatus shown in FIG. It is a figure explaining the processing flow of the pump control part which comprises the monitoring control apparatus shown in FIG.

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

In the present embodiment, as an example, a pump operation control method in the rain against a sewage pump station installed in a sewage treatment area of a combined sewer, and a monitoring control device for a sewage facility including at least a sewage pump station and a sewage treatment plant explain.
FIG. 1 is an overall schematic configuration diagram of a sewer facility and a monitoring control device according to an embodiment of the present invention. As shown in FIG. 1, the sewage equipment includes a sewage pump station 2 a, a sewage pump station 2 b, a sewage pump station 2 n, and a sewage treatment plant 3. The sewage pumping station 2a receives the sewage that has flowed from the sewage pipe 4a, and discharges rainwater out of the received sewage as untreated water to the discharge destination 7 that is a public water area such as a river through the discharge pipe tub 6a. At the same time, sewage other than rainwater out of the received sewage is sent to the sewage treatment plant 3 through the inflow pipe 5a. Similarly, the sewage pumping station 2b receives the sewage flowing in from the sewage pipe 4b, and the rainwater out of the received sewage is sent as untreated water to the discharge destination 7 which is a public water area such as a river through the discharge pipe tub 6b. The sewage other than rainwater out of the received sewage is sent to the sewage treatment plant 3 through the inflow pipe 5b. The sewage pumping station 2n accepts the sewage flowing in from the sewage pipe 4n, and discharges rainwater out of the received sewage as untreated water to the discharge destination 7 which is a public water area such as a river through the discharge pipe 6n. At the same time, sewage other than rainwater out of the received sewage is sent to the sewage treatment plant 3 through the inflow pipe 5n.

  The sewage treatment plant 3 includes sewage supplied from the sewage pump station 2a through the inflow pipe 5a, sewage supplied from the sewage pump station 2b through the inflow pipe 5b, and sewage through the inflow pipe 5n. For the sewage sent from the pumping station 2n, the treated pipe after the advanced sewage treatment such as activated sludge treatment in the biological treatment tank (not shown) is sent to the discharge destination 7 which is a public water area such as a river. Released through. In FIG. 1, the plurality of sewer pipes 4a, 4b, 4n, the sewage pump stations 2a, 2b, 2n, the inflow pipes 5a, 5b, 5n, and the discharge pipes 6, 6a, 6b, 6n are separated into the sewage treatment section 8. The case is assumed.

  In addition, the sewage pump station 2 a, the sewage pump station 2 b, the sewage pump station 2 n, and the sewage treatment plant 3 communicate with the monitoring and control device 1 installed in a remote place away from the sewage treatment plant 3 via the communication network 9. Is communicably connected. The monitoring control device 1 may be installed in the sewage treatment plant 3. In this case, the monitoring control device 1 communicates with the sewage pump station 2a, the sewage pump station 2b, and the sewage pump station 2n via a signal line (whether wired or wireless).

(Sewage pump station)
FIG. 3 is a schematic configuration diagram of one sewage pumping station 2a shown in FIG. 1, and FIG. 4 is a diagram for explaining the outline of the sewage pumping station 2a. The other sewage pumping stations 2b and 2n have the same configuration.
As shown in FIG. 3, the sewage pump station 2a, which is a control target of the monitoring control device 1 to be described later, measures at least the storm water pump well 23 that receives sewage flowing in from the sewage pipe basin 4a and the water level in the storm water pump well 23. A water level gauge 24, a rainwater pump 21, and a sewage pump 22. A measured value 32 including data measured by the water level gauge 24 and data related to the operation status of the rainwater pump 21 and the sewage pump 22 is transmitted to the monitoring control device 1 via the communication network 9. On the other hand, a control signal 33 is input to the rainwater pump 21, the sewage pump 22, etc. via the communication network 9 from the monitoring control device 1 described later.

  Moreover, as shown in FIG. 4, the sewage pumping station 2a includes an inflow gate 25, a sand basin 26, and a downstream side of the sand basin 26 (the rainwater pump well 23 side) installed on the connection part side with the sewage pipe 4a. And an overflow dam (not shown) that can be changed in height. When rainfall occurs in the sewage treatment area 8, rainwater enters the sewage flowing through the sewage pipe 4 a, passes through the inflow gate 25, and sewage (including sewage and rainwater) flows into the sand basin 26. At this time, the sewage exceeding the overflow weir (not shown) flows into the rainwater pump well 23 and is pumped out by the rainwater pump 21 to the discharge destination 7 which is a public water area such as a river through the discharge pipe basin 6a. Untreated water by only 26 (simple treated water: only solids (contaminants) in sewage removed) are discharged. In other words, the storm water pump 21 bypasses the sewage treatment plant 3 through the discharge pipe 6a without performing advanced sewage treatment such as activated sludge treatment in the sewage treatment plant 3 to the public water area such as a river. It is a pump that discharges water to be removed. On the other hand, the sewage pump 22 is a pump for discharging water to be treated in the sewage treatment plant 3 out of the sewage that has flowed. The supernatant water in the sedimentation basin 26 flows into a sewage pump well (not shown), is pumped out by the sewage pump 22, and is sent to the sewage treatment plant 3 through an inflow pipe 5a. The sewage pump station 2a appropriately determines the discharge amount of each of the storm water pump 21 and the sewage pump 22 using the data of the water level gauge 24 installed in the storm water pump well 23 and various data described later, and sewage containing rain water. It is a facility that has the function of processing. In addition, a coagulation tank is provided in the discharge pipe rod 6a, a floc is formed by the coagulant, the floc is settled in the coagulation tank, and the supernatant water in the coagulation tank is discharged to a discharge destination 7 such as a river as simple treated water. You may comprise so that it may discharge through 6a.

(Supervisory control device)
FIG. 2 is a functional block diagram of the monitoring control device 1 shown in FIG. As shown in FIG. 2, the monitoring control device 1 includes a pump station simulator 10, a measurement value acquisition unit 11, a sewage treatment area DB 12, a risk calculation unit 13, a pump discharge amount calculation unit 14, a pump control unit 15, and a communication I / F 16. , And an input / output I / F 17, which are connected to each other via an internal bus 20. The display unit 18 and the input unit 19 are connected to the internal bus 20 via the input / output I / F 17. The display unit 18 is configured by, for example, a liquid crystal display (LCD) or an organic EL display, and the input unit 19 is configured by, for example, a mouse and a keyboard.
The pump station simulator 10, the measurement value acquisition unit 11, the risk calculation unit 13, the pump discharge amount calculation unit 14, and the pump control unit 15 are, for example, a processor such as a CPU (not shown), a ROM that stores various programs, an arithmetic process The RAM is temporarily stored in a storage device such as a RAM and an external storage device, and a processor such as a CPU reads out and executes various programs stored in the ROM, and the operation result as an execution result is stored in the RAM or Store in external storage.

  The monitoring and control device 1 includes an external measurement value 31 including a rainfall amount measured in the sewage treatment area 8, a flow rate and a water level of sewage to the sewer pipes 4a, 4b, 4n, and sewage pump stations 2a, 2b, 2n. Based on the measured value 32 including the data of the measured water level gauge 24 and the data related to the operation status of the rainwater pump 21 and the sewage pump 22, various arithmetic processes described later are performed and the control signal 33 is output. It has a function to operate the facilities and equipment in the sewage pumping stations 2a, 2b, 2n.

  The pump station simulator 10 reproduces the operation of facilities such as the sedimentation basin 26 and the rainwater pump well 23 of the sewage pump station 2a shown in FIG. 4 and the operation of devices such as the inflow gate 25, the rainwater pump 21, and the sewage pump 22. A mathematical model is provided, and the operation of the sewage pump station 2a can be reproduced by using the external measurement value 31, the measurement value 32, or the like as input. The operation of the sewage pump station 2a here means, for example, how the water level of the storm water pump well 23 changes when the discharge amount of the storm water pump 21 and the sewage pump 22 is controlled for a certain inflow sewage amount, In connection with this, it points out how the water level of the sewer pipe 4a connected to the sewage pump station 2a changes. By performing such a simulation, it is possible to evaluate how the submergence risk of the sewage pump station 2a and the inundation risk of the sewage treatment area 8 change when the pump control is performed, and to set an appropriate control signal 33. It becomes possible. The control signal 33 is transmitted to the communication network 9 via the internal bus 20 and the communication I / F 16 and is received by the sewage pump station 2a via the communication network 9.

  In addition, the mathematical model provided here includes, for example, information on the size of the structure and the connection of piping for the rainwater pump well 23, and the rainwater pump well 23 with respect to the change in the inflow flow rate according to the hydraulic formula. It is a model that can calculate changes in the water level. As the models for the rainwater pump 21 and the sewage pump 22, models expressing the relationship between the head and the discharge amount, the relationship between the pump rotation speed and the discharge amount, the relationship between the pump rotation speed and the power consumption, and the like are used. Further, a sewage treatment plant simulator (not shown) capable of evaluating the quality of the treated water of the sewage treatment plant 3 to be linked is provided inside or outside the pump station simulator 10. For example, an activated sludge model is provided in a sewage treatment plant simulator (not shown) as a mathematical model that can reproduce activated sludge treatment in a general biological treatment tank as a sewage treatment process. If the sewage pump station 2a is controlled by the monitoring and control device 1, the facility or equipment related to the sewage pump station 2a is installed in the same sewage treatment area 8; It becomes the sewage pumping station 2n and the sewage treatment plant 3.

  In the sewage treatment area DB 12, as described above, in addition to data such as rainfall measured in the sewage treatment area 8, sewage flow rate and water level to the sewage pipes 4 a, 4 b, 4 n, the sewage treatment area Weather radar (microwave radar) data for predicting the amount of rain and water quality measurement values (suspended matter, organic matter, pH, etc.) of influent sewage are stored as external measurement values 31 as needed. It is desirable.

  The measurement value acquisition unit 11 acquires the above external measurement value 31 and measurement value 32 via the communication I / F 16 and the internal bus 20. The measurement value acquisition unit 11 performs processing such as noise removal, smoothing, or normalization on the acquired external measurement value 31 and measurement value 32, and the pump station simulator 10, risk, and the like via the internal bus 20. It transfers to the calculation part 13 and the pump discharge amount calculation part 14, and it stores in sewage treatment area DB12.

  The risk calculation unit 13 refers to the information of the pump station simulator 10 via the internal bus 20 and calculates a risk index for determining whether the operation control is good or bad. The risk index calculated here is a quantitative expression of the risk related to inundation of the sewage treatment area 8, sewage treatment failure, pollution load, and submersion of the sewage pumping station. The risk calculation unit 13 transfers the calculated risk index to the pump discharge amount calculation unit 14 via the internal bus 20.

  The pump discharge amount calculation unit 14 calculates the pump discharge amounts of the rainwater pump 21 and the sewage pump 22 that minimize the risk index transferred from the risk calculation unit 13 via the internal bus 20. The pump discharge amount calculation unit 14 transfers the pump discharge amounts of the rainwater pump 21 and the sewage pump 22 that minimize the calculated risk index to the pump control unit 15 via the internal bus 20.

  The pump control unit 15 determines a pump control operation corresponding to the pump discharge amount of the rainwater pump 21 and the sewage pump 22 that minimizes the risk index transferred from the pump discharge amount calculation unit 14 via the internal bus 20, The control signal 33 is transmitted to the sewage pump stations 2a, 2b, 2n via the internal bus 20, the communication I / F 16, and the communication network 9, thereby operating the sewage pump stations 2a, 2b, 2n.

  Next, a specific processing flow of the risk calculation unit 13, the pump discharge amount calculation unit 14, and the pump control unit 15 constituting the monitoring control device 1 will be described. In addition, below, the case where the control object by the monitoring control apparatus 1 is the sewage pump station 2a is demonstrated as an example.

FIG. 5 is a diagram for explaining the processing flow of the risk calculation unit 13 constituting the monitoring control device 1 shown in FIG.
As shown in FIG. 5, in step S <b> 101, the risk calculation unit 13 executes a measurement value reading process. Specifically, the risk calculation unit 13 performs the measurement value acquisition unit 11 on the external measurement value 31 and the measurement value 32 related to the sewage pump station 2a acquired via the communication I / F 16 and the internal bus 20. For example, data that has undergone processing such as noise removal, smoothing, or normalization is acquired. Thereby, the external measurement value 31 and the measurement value 32 regarding the sewage pump station 2a will be in the state which can be used for the calculation after the following process.

  In step S102, the risk calculation unit 13 executes an output reading process of the pump station simulator 10. Specifically, the risk calculation unit 13 accesses the pump station simulator 10 via the internal bus 20, and various simulation results calculated by the pump station simulator 10, for example, a sewage pump calculated under certain pump control conditions. Data such as the water level of the rainwater pump well 30 and the water level of the sewer pipe 4a in the field 2a is read. The data read in step S101 and step S102 includes the current state value or a future predicted value by simulation. In addition, in the above-mentioned step S101 and step S102, the same process is performed for the sewage pump station 2b and the sewage pump station 2n installed in the same sewage treatment area 8 as related facilities other than the sewage pump station 2a to be controlled. Run. That is, the risk calculation unit 13 acquires, for example, data obtained by performing processing such as noise removal, smoothing, or normalization on the external measurement value 31 and the measurement value 32 related to the sewage pumping station 2b. The data such as the water level of the rainwater pump well 30 and the water level of the sewer pipe 4b in the sewage pumping station 2b calculated under the conditions is read. In addition, the risk calculation unit 13 acquires, for example, data obtained by performing processing such as noise removal, smoothing, or normalization on the external measurement value 31 and the measurement value 32 related to the sewage pump station 2n, and performs certain pump control. The data such as the water level of the rainwater pump well 30 in the sewage pumping station 2n and the water level of the sewage pipe 4n calculated under the conditions are read.

  In step S103, the risk calculation part 13 performs the inundation risk calculation process of the sewage treatment area 8 (FIG. 1). The inundation of the sewage treatment area 8 is performed with respect to the amount of inflow sewage in the sewage treatment area 8 (the amount of sewage discharged from business establishments and households + the amount of rainwater derived from rainfall) via the sewage pipe 4a. Occurs when the flow rate excluded from the field 2a is not sufficient. The inundation risk is specifically calculated based on the water level of a main sewer pipe (also called a merged trunk line) in the sewage treatment area 8, here, the water level of the sewer pipe 4a. The risk calculation unit 13 calculates the percentage of the water level of the sewer pipe 4a with respect to the preset dangerous water level (water level ÷ dangerous water level × 100). Instead of the percentage of the water level of the sewer pipe 4a with respect to the preset dangerous water level, the inundation risk in the sewage treatment area 8 may be calculated based on the rising speed of the water level of the sewer pipe 4a. Further, the inundation risk in the entire sewage treatment area 8 may be calculated as the sum of percentage ratios of the water levels of the main sewage pipes 4a, 4b, 4n. In step S103, the same processing is executed for the sewage pump station 2b and the sewage pump station 2n installed in the same sewage treatment area 8 as related facilities other than the sewage pump station 2a to be controlled. That is, the risk calculation unit 13 calculates the inundation risk as a percentage ratio of the sewer pipe 4b water level to the preset dangerous water level, and calculates the inundation risk as a percentage ratio of the sewer pipe 4n water level to the preset danger water level. calculate.

  In step S104, the risk calculation part 13 performs the submergence risk calculation process of the sewage pump station 2a. The submergence of the sewage pump station 2a occurs when the pump discharge amount is not sufficient with respect to the inflow sewage amount from the sewage pipe 4a. Specifically, the submergence risk is calculated based on the water levels of the sand basin 26 and the rainwater pump well 23 of the sewage pump station 2a shown in FIG. 4, and is set in advance as in the case of the inundation risk, for example. The risk calculation unit 13 calculates the percentage of the water level of the settling basin 26 and the rainwater pump well 23 with respect to the dangerous water level. Instead of the percentage of the water level of the settling basin 26 and the rainwater pump well 23 with respect to the preset critical water level, the sewage pumping station is based on the rising speed of the water level of the settling basin 26 and the rainwater pump well 23 of the sewage pumping station 2a. The submergence risk of 2a may be calculated. In step S104, the same processing is executed for the sewage pump station 2b and the sewage pump station 2n installed in the same sewage treatment area 8 as related facilities other than the sewage pump station 2a to be controlled. That is, the risk calculation unit 13 calculates the submergence risk of the sewage pumping station 2b in advance as a percentage of the water level of the settling basin 26 of the sewage pumping station 2b and the rainwater pump well 23 with respect to the preset dangerous water level. The submergence risk of the sewage pump station 2n is calculated as a percentage of the water level of the settling basin 26 of the sewage pump station 2n and the rainwater pump well 23 with respect to the set dangerous water level.

In step S105, the risk calculation unit 13 executes a pollution load risk calculation step. The risk calculation unit 13 quantitatively calculates a risk related to the pollutant load discharged from the sewage pumping station 2a and the sewage treatment plant 3 to a public water area such as a river. The target pollution load is the total of the pollution load due to direct discharge (also referred to as simple discharge) from the sewage pumping station 2a and the pollution load derived from the treated water discharged from the sewage treatment plant 3. The types of pollutant loads here are generally suspended substances (SS) and organic substances (BOD), or organic oxygen demand (COD). Further, if necessary, pathogenic microorganisms such as Escherichia coli and viruses can also be set as items of the pollution load.
The risk of pollution load derived from direct discharge (simple discharge) from the sewage pump station 2a is the product of the water quality concentration of the inflowing sewage flowing into the sand basin 26 of the sewage pump station 2a and the direct discharge flow. Calculated. When calculating the pollution load risk up to several hours ahead required for pump control judgment, the current value of the water quality concentration cannot be used, so the future water quality concentration predicted by the pump station simulator 10 or another method is used. It will be. Similarly, the risk of pollution load derived from the discharge of the sewage treatment plant 3 is calculated by the risk calculation unit 13 as the product of the water quality concentration of the treated water and the treated water amount. In order to determine the quality of pump control, the pollution load risk under the conditions that assume a certain control operation is calculated using, for example, the activated sludge method model, which is a well-known technology, using the treated water quality data estimated under various conditions. It can also be used. Also in step S105, the same processing is executed for the sewage pump station 2b and the sewage pump station 2n installed in the same sewage treatment area 8 as related facilities other than the sewage pump station 2a to be controlled. That is, the risk calculation unit 13 determines the pollution load risk derived from direct discharge (simple discharge) from the sewage pump station 2b as the water concentration and the direct discharge flow rate of the inflow sewage flowing into the sand basin 26 of the sewage pump station 2b. The pollution load risk derived from direct discharge (simple discharge) from the sewage pump station 2n is calculated as the water quality concentration of the inflow sewage flowing into the sand basin 26 of the sewage pump station 2n and the direct discharge flow (simple Calculated as the product of (release).

  In step S106, the risk calculation unit 13 executes a consumption energy calculation process. The current control status of the sewage pump station 2a or the energy consumption (energy risk) in the assumed control operation is calculated. Specifically, the risk calculation unit 13 accesses the pump station simulator 10 via the internal bus 20 and calculates the power consumption of the rainwater pump 21, the sewage pump 22, the inflow gate 25, and various auxiliary machines. . In addition to this, the power consumption of not only the sewage pump station 4a but also the sewage treatment station 3 installed in the same sewage treatment area 8 and linked to the sewage pump station 2a may be calculated. In step S106, the same processing is executed for the sewage pump station 2b and the sewage pump station 2n installed in the same sewage treatment area 8 as related facilities other than the sewage pump station 2a to be controlled. That is, the risk calculation unit 13 accesses the pump station simulator 10 via the internal bus 20, and calculates the power consumption of the rainwater pump 21, the sewage pump 22, the inflow gate 25, and various auxiliary machines of the sewage pump station 2b. calculate. In addition, the risk calculation unit 13 accesses the pump station simulator 10 via the internal bus 20, and calculates the power consumption of the rainwater pump 21, the sewage pump 22, the inflow gate 25, and various auxiliary machines of the sewage pump station 2 n. calculate.

  In step S107, the risk calculation unit 13 executes a calculated risk output process. Specifically, the risk calculation unit 13 transfers the risk index and energy consumption calculated in the processes so far to the pump station simulator 10 via the internal bus 20. In this embodiment, as described above, the inundation risk of the sewage treatment area 8, the risk of submersion of the sewage pump station 2a to be controlled, and the sewage pump station 2b and the sewage pump station 2n installed in the sewage treatment area 8 are as follows. Instead of a configuration that calculates and outputs all of the submergence risk and pollution load risk, for example, a configuration that calculates and outputs only the pollution load risk may be used. The submersion risk and sewage treatment area 8 of the sewage pump station 2a that is the control target may be used. It is good also as a structure which outputs only the submergence risk of the sewage pumping station 2b and the sewage pumping station 2n installed in the. Furthermore, it is good also as a structure which calculates and outputs these submergence risks and pollution load risks. Moreover, you may handle as one risk index by the product sum which multiplied the weighting coefficient of each risk index set beforehand.

FIG. 6 is a diagram for explaining the processing flow of the pump discharge amount calculation unit 14 constituting the monitoring control device 1 shown in FIG.
As shown in FIG. 6, in step S201, the pump discharge amount calculation unit 14 executes a measurement value reading process. Specifically, the pump discharge amount calculation unit 14 sets the external measurement value 31 and the measurement value 32 related to the sewage pump station 2a acquired by the measurement value acquisition unit 11 via the communication I / F 16 and the internal bus 20. On the other hand, for example, data subjected to processing such as noise removal, smoothing, or normalization is acquired. Thereby, the external measurement value 31 and the measurement value 32 regarding the sewage pump station 2a will be in the state which can be used for the calculation after the following process.

  In step 202, the pump discharge amount calculation unit 14 executes a pump discharge amount range setting step. Specifically, the pump discharge amount calculation unit 14 accesses the pump station simulator 10 via the internal bus 20 for each of the storm water pump 21 and the sewage pump 22 installed in the sewage pump station 2a, and Based on the pump specifications stored in the mathematical model, a calculation range for searching for the optimum discharge amount in the subsequent processes is set. In general, since multiple pumps are installed, it can be set by the total capacity of each pump. However, when there are pumps that cannot be started due to pump restart restrictions or maintenance reasons. It is necessary to reduce the capacity of the pump.

  In step S203, the pump discharge amount calculation unit 14 executes a pump discharge amount data set output step. Specifically, the pump discharge amount calculation unit 14 divides the range of the pump discharge amount set in step S202 described above by a predetermined width (combination data of the discharge amount of the rainwater pump 21 and the discharge amount of the sewage pump 22). ) Is created, and the pump station simulator 10 or the like is made available for calculation, and is transferred to the pump station simulator 10 or the like via the internal bus 20. On the condition of the data set transferred from the pump discharge amount calculation unit 14, a simulation is performed in the pump station simulator 10 and, if necessary, a sewage treatment plant simulator. Further, referring to these simulation results, the risk calculation unit 13 calculates various risk indexes as described above.

  In step S204, the pump discharge amount calculation unit 14 executes a calculation risk data set reading process. Specifically, the risk data set calculated by the risk calculation unit 13 is read via the internal bus 20. This calculated risk data set includes the calculation result of the risk index corresponding to the pump discharge amount data set output in step S203 described above.

In step S205, the pump discharge amount calculation unit 14 executes an optimum pump discharge amount determination step. The pump discharge amount calculation unit 14 determines and extracts the pump discharge amount data corresponding to the minimum risk index among the calculation results included in the risk data set, that is, the optimum pump discharge amount that can realize the minimum risk. . Here, the optimum pump discharge amount determination step will be described in more detail.
In the operation control of the sewage pumping station 2a which is the control target by the monitoring control device 1, not only the target sewage pumping station 2a but also the sewage treatment plant 3 which is a discharge destination of sewage as shown in FIG. It is important to perform operation control in cooperation with a plurality of sewage pump station groups (sewage pump stations 2b,... 2n) installed in the same sewage treatment area 8. Specifically, the amount discharged through the sewage pump stations 2a, 2b,... 2n and the sewage pipes 4a, 4b,... 4n, that is, the pump discharge amount (hereinafter referred to as intercepted water amount). The amount of intercepted water in which the total risk is minimized by predicting the inundation risk in the entire sewage treatment area 8 with the pump station simulator 10 when the amount of intercepted water is increased or decreased. Control the operation with the combination of
Alternatively, the amount of sewage treated at the sewage treatment plant 3 is predicted using a sewage treatment plant simulator when the amount of sewage treated at the sewage treatment plant 3 is increased or decreased, so that the total risk is minimized. In other words, operation control is performed while appropriately changing the total amount of pump discharge from each sewage pump station. Therefore, each risk index (the inundation risk in the sewage treatment area, the inundation risk in the sewage pump station, the pollution load risk) calculated in steps S103 to S105 in the processing flow by the risk calculation unit 13 shown in FIG. In addition to the sewage pumping station 2a to be controlled, the sewage pumping stations 2b, ... 2n installed in the same sewage treatment area 8 and the sewage treatment plant 3 in cooperation with the sewage pumping station 2a to be controlled. Is calculated in consideration of the above.
Here, the total risk is, for example, a linear sum of values obtained by multiplying each of the inundation risk, the pollution load risk, and the consumed energy by a weighting factor wi (i: type of risk). It can be calculated by the following equation (1).
Total risk R (t) = Σ [wi × risk {i, Q (t)}] (1)
The pump discharge amount calculation unit 14 extracts a pump discharge amount that minimizes the total risk R (t) shown in the above formula (1).
Note that the weighting factor wi is set to the same value (for example, 1.0) when handling each risk equally, but can be arbitrarily changed and set.

  In step S206, the pump discharge amount calculation unit 14 executes an optimum pump discharge amount output step. Specifically, the pump discharge amount calculation unit 14 transfers the optimal pump discharge amount that minimizes the total risk extracted in step S <b> 205 to the pump station simulator 10 via the internal bus 20. The pump discharge amount calculation unit 14 is basically executed for each control cycle by the pump control unit 15 described later, but is input by the user of the monitoring control device 1 through the input unit 19 as necessary. It can also be executed according to instructions.

FIG. 7 is a diagram illustrating a processing flow of the pump control unit 15 included in the monitoring control device 1 illustrated in FIG.
As shown in FIG. 7, in step S <b> 301, the pump control unit 15 executes an optimum pump discharge amount reading step in the optimum pump discharge amount reading step 510. Specifically, the pump control unit 15 determines the optimum pump discharge amount (combination of the discharge amount of the rainwater pump 21 and the discharge amount of the sewage pump 22) output from the pump discharge amount calculation unit 14 in step S206 described above. The data is read via the internal bus 20 and can be used in subsequent processes.

  In step S302, the pump control unit 15 executes a pump allocation rule reading process. Specifically, the pump control unit 15 accesses the pump station simulator 10 via the internal bus 20, and determines in what order and rules the start / stop and discharge amount are assigned to a plurality of pumps from the pump station simulator 10. Read. This rule defines, for example, a method for determining a pump to be started and a pump to be stopped based on a start / stop history of each pump so that the operation rate of each pump is not biased. In addition, regarding the allocation of the discharge amount to each pump so that the optimum pump discharge amount can be obtained, for example, when pumps with different capacities and fixed speed / variable speed pumps are mixed, variable speeds up to a predetermined discharge amount can be obtained. It also includes rules such as starting from pump activation and switching to a fixed speed pump when a predetermined discharge rate is exceeded. Moreover, the pump immediately after a stop can also include a rule such as removing it from the starting target for a predetermined time.

  In step S303, the pump control unit 15 executes a pump start / stop / discharge amount determination step. Specifically, the pump control unit 15 determines the start / stop and discharge amount of each pump (the rainwater pump 21 and the sewage pump 22 each having a plurality of units) based on the rules read in step S303 described above. Then, the data is transferred to the pump station simulator 10 via the internal bus 20. The pump control unit 15 sends the control signal 33 relating to the start / stop of the pump and the discharge amount outputted here via the internal bus 20, the communication I / F 16 and the communication I / F 16 to the sewage pump station 2a which is the control target. The actual control operation of the pump is executed.

  In addition to the functions described above, the operating state and control state can be visually recognized on the display screen (not shown) of the display unit 18 as a function for supporting the user of the monitoring control device 1 (the driver of the sewage pump station 2a). It is desirable to have a configuration for displaying the above. Specifically, the risk index calculated by the risk calculation unit 13 is displayed in the map of the corresponding sewage treatment area 8. Alternatively, the start / stop, the current state of the discharge amount, the predicted value of the preceding control up to several hours ahead, etc. are displayed in the equipment layout diagram of the sewage pump station 2a. This makes it possible to easily and accurately grasp the current operation state and control state and take necessary measures.

In this embodiment, as facilities or equipment related to the controlled sewage pump station 2a, other sewage pump stations 2a, 2b,... 2n installed in the same sewage treatment area 8 and sewage Although the case where it was set as the processing place 3 was demonstrated, it is not necessarily restricted to this. For example, another sewage pump station connected to the same sewage pipe tub to which the sewage pump station to be controlled is connected may be a facility or equipment related to the sewage pump station to be controlled.
Further, the weighting factor wi (i: risk type) defined in the above equation (1) may be set as follows. Multiple sewage pumping stations connected to the same sewage pipe basin, or multiple sewage pumping stations and sewage treatment plants installed in the same sewage treatment area, have different installation locations, for example, in urban areas or residential areas. There are a sewage treatment plant as a sewage treatment zone, a sewage treatment plant with a sewage treatment zone in a field relatively short of residential land or an area relatively close to a mountainous area. When urban areas or residential districts are sewage treatment areas, it is essential to avoid inundation risk, whereas in areas where relatively few residential land or mountainous areas are relatively sewage treatment areas Therefore, the priority for avoiding inundation risk is low. Therefore, in the case where a relatively small residential land or a mountainous area is a sewage treatment area, a large amount of direct discharge (simple discharge) from the sewage pump station is set, that is, a weighting factor for inundation risk. It may be set low.

As described above, according to the present embodiment, in addition to the sewage pumping station, the monitoring control device for the sewerage equipment and the sewage pumping station that can be extended to a wider control range in cooperation with related facilities other than the sewage pumping station. It is possible to provide an operation control method.
In addition, according to this embodiment, in the combined sewer system in which rainwater that falls in the sewage treatment area flows into the sewer pipe during rainy weather, conventionally, pump operation control for avoiding submergence of the sewage pump station is performed. I came. In addition to this, in this embodiment, in addition to considering the risk of other events to be avoided at the same time, by realizing pump operation control in cooperation with other sewage pump stations and sewage treatment plants, It is possible to suppress the inundation of the sewage treatment area due to the increase in the amount of inflow of sewage, the deterioration of the treated water quality at the sewage treatment plant, and the increase in the pollution load to the public water area due to the simple discharge.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

DESCRIPTION OF SYMBOLS 1 ... Monitoring and control apparatus 2a, 2b, 2n ... Sewage pump station 3 ... Sewage treatment plants 4a, 4b, 4n ... Sewage pipes 5a, 5b, 5n ... Inflow pipes 6, 6a , 6b, 6n ... Discharge pipe 7 ... Discharge destination 8 ... Sewage treatment area 9 ... Communication network 10 ... Pump station simulator 11 ... Measurement value acquisition unit 12 ... Sewage treatment Ward DB
13 ... Risk calculation unit 14 ... Pump discharge amount calculation unit 15 ... Pump control unit 16 ... Communication I / F
17 ... I / O I / F
DESCRIPTION OF SYMBOLS 18 ... Display part 19 ... Input part 20 ... Internal bus 21 ... Rainwater pump 22 ... Sewage pump 23 ... Rainwater pump well 24 ... Water level gauge 25 ... Inflow gate 26 ... Sedimentation basin 31 ... External measurement value 32 ... Measurement value 33 ... Control signal

Claims (11)

A monitoring and control device for a sewerage facility having a plurality of sewage pumping stations connected to a sewage pipe basin and supplying sewage flowing from the sewage pipe basin to a sewage treatment plant and / or a discharge destination,
The monitoring and control device includes:
At least a risk calculation unit that calculates a pollution load risk index based on the pollution load from the sewage pumping station to be controlled and the sewage treatment plant linked to the one sewage pumping station to the discharge destination,
A pump discharge amount calculation unit for obtaining a discharge amount of a pump installed in the one sewage pump station where the pollution load risk index is minimized, and a pump discharge amount obtained by the pump discharge amount calculation unit And controlling the one sewage pumping station based on the above. In the sewerage equipment monitoring and control device according to claim 1,
The risk calculation unit calculates an inundation risk index in the sewage treatment area based on a water level for each of a plurality of sewer pipes installed in the same sewage treatment area,
The pump discharge amount calculation unit obtains a discharge amount of a pump installed in the one sewage pump station that minimizes the inundation risk index and the pollution load risk index in the sewage treatment area. Monitoring and control device. In the sewerage equipment monitoring and control device according to claim 2,
The risk calculation unit calculates a submersion risk index of the sewage pumping station based on a water level for each of a plurality of sewage pumping stations installed in the same sewage treatment area,
The pump discharge amount calculation unit includes a discharge amount of a pump installed in the one sewage pump station where the inundation risk index and the pollution load risk index in the sewage treatment area and the submersion risk index of the sewage pump station are minimized. A monitoring and control device for sewerage equipment, characterized by In the sewerage equipment monitoring and control device according to claim 1,
The risk calculation unit calculates a submersion risk index of the sewage pumping station based on the water level for each of a plurality of sewage pumping stations connected to the same sewage pipe dredger,
The pump discharge amount calculation unit obtains a discharge amount of a pump installed in the one sewage pump station where the pollution load risk index and the submersion risk index of the sewage pump station are minimized. Supervisory control device. In the monitoring and control apparatus for sewerage equipment according to claim 3 or claim 4,
A sewage equipment monitoring and control device comprising a pump station simulator that reproduces at least the operation of a pump installed in each sewage pump station based on the water level of each of the plurality of sewage pump stations. In the sewerage equipment monitoring and control device according to claim 5,
It is provided with a display unit for displaying on the screen the operating state of the pumps installed in each sewage pump station obtained by the pump station simulator or the pollution load risk index and the submersion risk index of the sewage pump station. Supervisory control device. An operation control method for a plurality of sewage pump stations connected to a sewage pipe dredger and sending sewage flowing from the sewage pipe dredger to a sewage treatment plant and / or a discharge destination,
Calculate at least a pollution load risk index based on the pollution load from the sewage pumping station to be controlled and the sewage treatment plant linked to the one sewage pumping station to the discharge destination,
Obtain the discharge amount of the pump installed in the one sewage pumping station where the pollution load risk index is minimized,
An operation control method for a sewage pump station, wherein the one sewage pump station is controlled based on the determined pump discharge amount. In the operation control method of the sewage pump station according to claim 7,
Based on the water level for each of the multiple sewer pipes installed in the same sewage treatment area, calculate the inundation risk index in the sewage treatment area,
An operation control method for a sewage pump station, wherein a discharge amount of a pump installed in the one sewage pump station that minimizes the inundation risk index and the pollution load risk index in the sewage treatment area is obtained. In the operation control method of the sewage pumping station according to claim 8,
Based on the water level for each of a plurality of sewage pump stations installed in the same sewage treatment area, the submersion risk index of the sewage pump station is calculated,
The sewage is characterized by obtaining a discharge amount of a pump installed in the one sewage pumping station that minimizes the inundation risk index and the pollution load risk index in the sewage treatment area and the submersion risk index of the sewage pumping station. Pump station operation control method. In the operation control method of the sewage pump station according to claim 7,
Based on the water level for each of a plurality of sewage pump stations connected to the same sewage pipe basin, a submersion risk index for the sewage pump station is calculated,
An operation control method for a sewage pump station, characterized in that a discharge amount of a pump installed in the one sewage pump station that minimizes the pollution load risk index and the submersion risk index of the sewage pump station is obtained. In the operation control method of the sewage pumping station according to claim 9 or 10,
An operation control method for a sewage pump station, wherein the operation of at least the pump installed in each sewage pump station is reproduced by a pump station simulator based on the water level for each of the plurality of sewage pump stations.

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