JPH04187881A - River basin pump station operation supporting system - Google Patents

Abstract

PURPOSE:To provide highly reliable support by entering in a river-basin sewer age process simulation means with an operating condition setting means and a process value input means, calculating the result with an inflow load smooth ness calculation means and judging an optimum operation with an optimum operation judging means. CONSTITUTION:All kinds of pump operating conditions such as pump using precedence, starting, stopping water level and inflow drain operational water level of each pump station of a river-basin sewerage are set by an operating condition means 1; pump well water level, inflow drain water level and the pump operating condition of each pump station are entered as a process value by a process value input means 2, and simulated by a river-basin sewerage process simulation means 3 composed of pumping, pipe storage, sewage water transfer and sewage water inflow process. Dispersion of time fluctuation of a terminal treatment plant inflow obtained through the simulation is calculated as inflow load smoothness to the terminal treatment plant by a inflow load smoothness calculation means 4, pump operation of the best smoothness is judged as the optimum operation by an optimum operation judging means 5 and outputted to an operation program output means 6.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Field of Industrial Application) The present invention is designed to support efficient operation of each pumping station in a basin sewerage system consisting of a plurality of pumping stations and final treatment plants. This relates to a basin pumping station operation support system.

(Conventional technology) In general, basin sewerage is a system that collects sewage flowing from the public sewers of two or more municipalities in the basin of one river, lake, etc. over a wide area, without being restricted to administrative areas. ,
This is a large-scale sewage system that purifies waste at a final treatment plant and discharges it into public water bodies. For this reason, it is necessary to consider a remote monitoring and control system that comprehensively manages and operates the relay pumping stations of the basin sewer system at a management center. The current management system for such a group of relay pumping stations is a manned management system in which an operator is assigned to each pumping station.

The purpose of sewage relay pumping stations is to transport sewage and remove rainwater from the basin, but most of this flows into the final treatment plant, so in order for the final treatment plant to operate stably, relay pumping stations are required. It is necessary to centrally manage the

In addition, in order to operate pumping stations efficiently, it is necessary to understand pumping station groups, pipes, pipe networks, etc., and to understand process changes and
It is necessary to make quick and accurate judgments regarding abnormalities.

However, at present, most of these systems rely on the operator's experience, and if a centralized monitoring and control system is used, this will place a heavy burden on the operator.

Hereinafter, this point will be specifically explained using the basin sewer system shown in FIG. 12 as an example.

In Fig. 12, the basin is broadly divided into trunk system A and trunk system B, with relay pumping stations A1 to A4, respectively. B,
~B2, and flow into one unit at pumping station C. Furthermore, the sewage relayed at pump station C is sent to a final treatment plant.

The purposes of pump operation in these drainage basins are (a) to prevent flooding of pumping stations, and (b) to smooth out the inflow load to final treatment plants. In the basin sewer system, the amount of inflowing sewage fluctuates every day, and pumps are operated carefully according to the amount of inflow. For example, at pump station B2, a machine with an appropriate capacity is selected depending on the inflow amount, and at pump station C, an appropriate combination of a plurality of machines is selected depending on the inflow amount.

In addition, some pumping stations have reduced the burden on operators by automatically operating pumps using a level switch system, but at other pumping stations, pumps are The reality is that vehicles rely on manual operation.

The basics of pump use in watersheds is the operation of a single large-capacity pump. If the amount of inflow is large enough for one unit to operate, a second unit is additionally activated. In principle, this operation is similar to automatic pump operation using a level switch method.

In actual manual operation, units are replaced depending on the operating conditions and inflow volume, but the criteria and logic for this decision are not clear from the perspective of smoothing the inflow load to the treatment plant. In other words, there is no clear judgment criteria or logic, such as that operating in this way is better for pump operation, or that selecting a particular unit for a certain type of inflow will help smooth out the inflow load to the final treatment plant, and human When attempting to operate a pump within the limited information processing capacity of the pump, it is extremely difficult to achieve optimal operation that achieves the above objectives.

(Problems to be Solved by the Invention) As described above, if we attempt to operate each pump station in the basin sewerage system through manual and intuitive operation by operators, we will be able to ensure unified and stable operation, and even achieve optimal operation. There was a problem in that the burden on operators would become increasingly heavy as the inflow volume increased in the future without guaranteeing operation.

The purpose of the present invention is to optimize the degree of smoothing of the inflow load to the final treatment plant under various operating conditions by utilizing simulations that simulate the sewage flow rate and pump operation process in the basin sewerage system. An object of the present invention is to provide an extremely reliable watershed pumping station operation support device that can notify an operator in advance of pump operation and support the operation.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention uses a simulation to provide a device that supports pump operation of a basin sewer system consisting of a plurality of pumping stations and a final treatment plant. An operation condition setting means for setting various pump operation conditions such as pump usage priority, start/stop water level, inflow conduit operation water level, etc. for each pump station, and at the start of simulation, a pump well water level for each pump station, Process value input means for inputting inflow channel water level and pump operation status as process values online, pumping process by pump operation, and in-pipe storage process by inflow gate operation.

Sewage transfer process from upstream pumping station to downstream pumping station,
A basin sewerage process simulation means for simulating a basin sewerage process consisting of a sewage inflow process from a basin based on pump operating conditions set by an operating condition setting means and a process value input by a process value input means; Inflow load smoothness calculating means for calculating the variance of the time fluctuation of the final treatment plant inflow amount obtained as a result of simulation by the process simulation means as the inflow load smoothness to the final treatment plant;
Optimum operation determining means for determining the pump operation with the highest smoothness among the inflow load smoothness calculated by the inflow load smoothness calculation means for various pump operation conditions as the optimum operation. There is.

(Function) Therefore, in the basin pumping station operation support device of the present invention, various pump operating conditions such as pump use priority, start/stop water level, inflow conduit operating water level, etc. for each pumping station of the basin sewer system required for simulation. are set by the operating condition setting means, and the pump well water level, inflow conduit water level, and pump operating state for each pumping station are input as process values by the process value input means. and the water pumping process by basin sewerage process simulation means.

A basin sewerage process consisting of an in-pipe storage process, a sewage transfer process, and a sewage inflow process is simulated based on the set operating conditions and input process values. Furthermore, the variance of the time fluctuation of the final treatment plant inflow obtained through the simulation was calculated as the inflow load smoothness to the final treatment plant by the inflow load smoothness calculation means, and was calculated for various pump operating conditions. Among the inflow load smoothness, the pump operation with the highest smoothness is determined as the optimum operation.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration example of a basin pumping station operation support device according to the present invention. That is, the basin pumping station operation support device of this embodiment includes an operating condition setting means 1, a process value inputting means 2, a basin sewerage process simulation means 3, an inflow load smoothness calculating means 4, and an optimum operation determining means 5. and an operation plan output means 6.

Here, the operating condition setting means 1 determines the pump use priority for each pump station necessary for the simulation.

This is used to set various pump operating conditions such as start/stop water level, inflow conduit operating water level, etc. In addition, the process value input means 2
At the start of the simulation, the pump well water level, inflow conduit water level, and pump operating status for each pumping station are input online as process values. Furthermore, the basin sewerage process simulation means 3 simulates a basin sewerage process consisting of a pumping process by pump operation, an in-pipe storage process by inflow gate operation, a sewage transfer process from an upstream pumping station to a downstream pumping station, and a sewage inflow process from the basin. , the simulation is performed based on the pump operating conditions set by the operating condition setting means 1 and the process values input by the process value inputting means 2.

On the other hand, the inflow load smoothness calculation means 4 calculates the variance of the time fluctuation of the final treatment plant inflow amount obtained as a result of the simulation by the basin sewerage process simulation means 3 as the inflow load smoothness to the final treatment plant. be.

Further, the optimum operation determination means 5 determines the pump operation with the highest smoothness among the inflow load smoothness calculated by the inflow load smoothness calculation means 4 for various pump operation conditions as the optimum operation. It is. Further, the operation plan output means 6 outputs the pump operation plan finally determined by the optimum operation determination means 5.

Figure 2 shows the basin sewerage process simulation means 3.
FIG. 2 is a block diagram showing an example of a functional configuration.

The basin sewerage process consists of a pumping process by pump operation, an in-pipe storage process by inflow gate operation, a sewage transfer process from upstream to downstream pumping stations, and a sewage inflow process from the basin. Figure 2 is drawn focusing on the sewage flow rate of a single pump station, and if multiple pump stations are connected to the main line of the basin, it will simulate all the above-mentioned processes of the basin sewage system.

First, the water pumping process by pump operation consists of pump number control 7 and discharge amount calculation 8 based on QH characteristics. There are various logics for controlling the number of pumps, but the simplest and most common one is the level switch method. This is a method in which the starting water level and stopping water level for each of the 1st, 2nd, 3rd, etc. operations are set in advance.The Q-H characteristics are as shown in Figure 3. It is a mechanical characteristic that shows the relationship between the discharge amount and the total head, and once the head is determined, the discharge amount can be calculated.

Next, the in-pipe storage process involves closing the pumping station inlet gate and temporarily storing sewage in the pipe in order to adjust the flow 2 in the drainage basin.

The inflow channel water level has an operational upper limit, so in the simulation, the water level is updated 9 based on the relationship (VH) between the storage amount and the water level as shown in FIG.

Additionally, the sewage transfer process between pumping stations can simulate the flow rate flowing into the downstream pumping station by delaying the flow rate waveform by the transfer time.

Furthermore, the sewage inflow process from the basin is the local domestic wastewater, industrial wastewater, etc. flowing into the main line, and this amount is added to the amount of sewage flowing down the main line from the upstream pumping station (water supply amount), and the downstream pump This is the amount of inflow into the field. In this case, although there are differences in seasons and days of the week, the flow rate change pattern for 24 hours a day is almost stable during clear weather, as shown in Figure 5, and the sewage inflow from the basin is statistically averaged. If the inflow pattern is used, the inflow amount update 10 can be performed by simulation.

Next, the operation of the basin pumping station operation support device of this embodiment configured as described above will be explained using FIGS. 6 to 11.

First, as for the pump operating conditions, for each pumping station, (a) pump usage priority, (b) pump start/stop setting water level, and (c) inflow operation water level are determined in advance by the operating condition setting means 1. Set.

Next, in the basin sewerage process simulation means 3, the basin sewerage process consists of a pumping process by pump operation, an in-pipe storage process by inflow gate operation, a sewage transfer process from the upstream pumping station to the downstream pumping station, and a sewage inflow process from the basin. is simulated based on the pump operating conditions set by the operating condition setting means 1 and the process values input by the process value inputting means 2.

That is, for example, when attempting to set up the current day's operation plan for one day from the current time, process values are input online using the process value input means 2. As for this process value, for each pumping station, (a) pump well water level, (b) inflow conduit water level, and (c) pump operating status! ! (start or stop).

Figure 6 shows the inflow flow rate of pumping station A1, Figure 7 shows the inflow channel water level, Figure 8 shows the amount of pumped water, and Figure 9 shows the pump operation status.
It is a figure which each shows the example of the simulation result for 4 hours. In this case, the number of pumps is controlled by a level switch system, and the pumps are operated at a fixed speed.

FIG. 10 is a diagram showing the water pumping amount of all pumping stations, that is, the pattern of the water supply amount. For one operating condition set by the operating condition setting means 1, the basin sewerage process simulation means 3 outputs one pump operating pattern as shown in FIG.

The bottom row of Figure 10 shows the amount of sewage flowing into the final treatment plant (
Fig. 11 shows an enlarged view of the inflow load.

Generally, in order to increase the efficiency of the water treatment system at a treatment plant, it is better to have a smaller temporal change in the amount of water flowing into the treatment plant. Ideally, the waveform shown in FIG. 11 would be flat, but the inflow load inevitably fluctuates due to the ability of the upstream pumping station C to avoid flooding and serve as a buffer.

Therefore, the inflow load smoothness calculation means 4 calculates the inflow load smoothness. In this case, there are several methods for evaluating the smoothness, but here we use the variance of the daily inflow amount as an index. That is, the smoothness −Σ (Q, , , −Qlfl
(t)) 2, the variance of the time fluctuation of the amount of people flowing into the final treatment plant obtained as a result of the simulation is calculated as the smoothness of the inflow load to the final treatment plant.

However, Q,,,: Average daily treatment plant inflow ffi (m'/H)Q
+, , (t): Treatment plant inflow ffi (m3/H
) The time increments in equation (1) can be set at the minimum interval of 1 minute, which is the same as in the simulation calculation.

Next, the optimal operation determination means 5 calculates the inflow load smoothness calculated by the inflow load smoothness calculation means 4 as described above.
Then, the operation with the highest smoothness among the combinations of pump operation conditions is determined to be the optimum operation, and is output to the operation plan output means 6. Here, highly smooth operation simply means (1
) has the minimum smoothness. Then, the pump operation plan finally determined by the optimum operation determination means 5 is
It will be outputted by the operation plan output means 6.

As described above, the basin pump station operation support device of this embodiment sets various pump operation conditions such as pump use priority, start/stop water level, and inflow conduit operation water level for each pump station necessary for simulation. Operation condition setting means 1, the pump well water level for each pump station at the start of the simulation,
Inlet water level.

A process value input means 2 for inputting the pump operation status as a process value online, a pumping process by pump operation, an in-pipe storage process by inflow gate operation, a sewage transfer process from an upstream pumping station to a downstream pumping station, and sewage from a basin. A basin sewerage process simulation means 3 that simulates a basin sewerage process consisting of an inflow process based on the pump operating conditions set by the operating condition setting means 1 and the process values input by the process value input means 2; An inflow load smoothness calculation means 4 calculates the variance of the time fluctuation of the inflow amount of the final treatment plant obtained as a result of the simulation by the simulation means 3 as the smoothness of the inflow load to the final treatment plant, and The optimum operation determination means 5 determines the pump operation with the highest smoothness among the inflow load smoothness calculated by the inflow load smoothness calculation means 4 as the optimum operation, and the optimum operation determination means 5 finally determines the pump operation. and an operation plan output means 6 for outputting the pump operation plan.

Therefore, by using this basin pump station operation support device, it is possible to know in advance the pump operating status under various pump operating conditions and the temporal change in sewage flow rate, allowing operators to plan the operation method and plan for the day. It will be possible to greatly support the establishment. In addition, it is possible to automatically search for the optimal combination of operations from the perspective of smoothing the amount of inflow to the final treatment plant, making it possible to unify operations that previously varied depending on the operator. becomes.

[Effects of the Invention] As explained above, according to the present invention, a simulation that simulates the sewage flow rate and pump operation process in the drainage basin is utilized, so the inflow load to the final treatment plant can be calculated under various operating conditions. It is possible to provide an extremely reliable watershed pumping station operation support device that can notify the operator in advance that the pump operation with the maximum degree of smoothing is the optimum pump operation and support the operation.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the basin pumping station operation support device according to the present invention; Fig. 2 is a block diagram illustrating an example of the functional configuration of the basin sewerage process simulation means in the same embodiment; Fig. 3; Figure 4 is a diagram showing an example of the Q-H characteristic, Figure 4 is a diagram showing an example of the relationship between storage volume and water level, Figure 5 is a diagram explaining the difference in sewage inflow pattern depending on the day of the week in the basin, Figure 6 shows an example of the results of basin sewerage process simulation for inflow flow rate, Figure 7 shows an example of the results of basin sewerage process simulation for inflow culvert water level, and Figure 8 shows an example of the results of basin sewerage process simulation for inflow water level. Figure 9 showing example results of basin sewerage process simulation
Figure 10 shows an example of the results of basin sewerage process simulation for the number of pumps in operation, Figure 10 shows an example of the results of basin sewerage process simulation for all pumping station water flow patterns, and Figure 11 shows the final treatment plant inflow flow rate. Fig. 12 is a main line diagram specifically showing an example of a basin sewerage process. 1. Operating condition setting means, 2. Process value input means, 3. Basin sewerage process simulation means,
4... Inflow load smoothness calculation means, 5... Optimal operation determination means, 6... Operation plan output means. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Discharge lit [m3/min] Figure 3 Inflow flow rate [M3/MIN] Inflow channel water level (TPM) Pumping amount time (hours) Figure 9 Black flow rate Figure 12

Claims (1)

[Scope of Claims] In a device that supports pump operation of a basin sewer system consisting of a plurality of pumping stations and a final treatment plant, the pump usage priority, start-up and
An operating condition setting means for setting pump operating conditions such as a stop water level and an inlet culvert operating water level, and an online input of the pump well water level, inlet culvert water level, and pump operating status for each pump station as process values at the start of the simulation. Process value input means and a basin sewerage process consisting of a pumping process by pump operation, an in-pipe storage process by operating an inlet gate, a sewage transfer process from an upstream pumping station to a downstream pumping station, and a sewage inflow process from a basin, under the above operating conditions. Basin sewerage process simulation means for simulating based on the pump operating conditions set by the setting means and the process values input by the process value input means;
an inflow load smoothness calculation means for calculating the variance of the time fluctuation of the inflow amount of the final treatment plant obtained as a result of the simulation by the basin sewerage process simulation means as the inflow load smoothness to the final treatment plant; and the various pump operations. Optimum operation determining means for determining, as the optimum operation, the pump operation with the highest smoothness among the inflow load smoothness calculated by the inflow load smoothness calculation means for the conditions, respectively. Basin pumping station operation support equipment.