JPH0525841A - Selector for intake well - Google Patents

Abstract

PURPOSE:To obtain a device to quickly and exactly control information on intake wells and also to automatically form an intake well selection plan on the basis of information on intake wells for the operation control system of a water purification system having intake wells as water sources. CONSTITUTION:On the basis of an intake pump operation plan housed in an intake pump operation plan housing section 20, a simulation of well intake amounts is made by a well intake amount estimator 21. Whether or not well intake amount estimates obtained are within an allowable range based on the intake amount plan is judged by a judger 22. When it is out of the allowable range, the intake pump operation plan is corrected by an operation plan corrector 23. A water level meter, a flow meter, and a power meter are periodically taken in by an intake well controller to obtain base unit and possible intake amount by the arithmetic unit. Also, water level and its change is monitored by a water level monitor. The information is transmitted to the host unit and preferential orders are reset on the basis of the base unit. When a warning is sent out from the water level monitor, the intake pump operation plan is reformed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the operation and management of a water purification system having a plurality of intake wells as a water source, and more particularly to a device for preparing and modifying an intake well selection plan.

[0002]

2. Description of the Related Art Generally, some water purification systems have a surface water source (river) and a groundwater source (well) as water sources.
FIG. 5 shows an outline of this type of water purification system. 1 is river, 2
Is a well (intake well). Each intake well 2 is provided with an intake pump 3. In the water purification plant 4, the raw water taken from the river 1 and the intake well 2 reaches the landing well 5 and is then sent to the floc formation pond 6. In the floc formation pond 6, flocculant is injected to form flocs. Suspended substances and impurities in raw water are taken into this floc. After this,
The flocs are settled and separated in the settling tank 7, filtered by the filter tank 8, and then temporarily stored in the clean water tank 9. Then, the water supply pump 10 appropriately supplies water from the water purification reservoir 9 to each distribution reservoir 11, and the water is distributed from the distribution reservoir 11 to the customers in each distribution area. The filter basin 8 needs to be regularly surface-washed and back-washed. The water used for cleaning is sent to the cleaning drainage basin 12, subjected to a precipitation treatment, and then sent to the landing well 5.

Next, a water operation planning procedure for this type of water purification system will be described. As shown in FIG. 6, first, the demand amount in each water distribution area is predicted (S1). There are various methods for predicting the demand amount, but basically, the demand amount for one day is predicted, and thereafter, the demand amount for each time unit is predicted from the demand amount for one day. Next, in order to secure the amount of water to be distributed for each hour, a plan for the amount of water to be stored in the distribution reservoir 11 is made (S2), and the amount of water to be sent from the water purification reservoir 9 is determined based on this plan (S3). Further, a water intake plan for making this water transmission possible is drafted (S4).

This water intake plan must be carried out under the following objectives and constraints. First, in order to ensure the taste of water, it is necessary to effectively use well water and blend it with surface water. In addition, it must be taken into consideration that a large amount of washing water (filtrated water) is required for the front and back washing of the filtration pond 8. Especially when the daily average demand does not reach the amount of water required for cleaning the filter basin at the beginning of operation, etc., the water intake of the filter basin 9 is temporarily increased to increase the amount of water in the filter basin 8.
Need to be washed. In addition, since the capacity of the water purification basin 9 is relatively small, it is necessary to take into consideration that the operation margin is small, and if a large amount of water is continued for a long time to clean the filtration basin 8, the water purification basin 9 may overflow. .
Under such constraints, it was difficult to formulate a water intake plan every day in a short time.

Therefore, the present applicant has filed Japanese Patent Application No. 1-116254.
Issue provides a method to support the preparation of water intake plans in the water treatment plant management system. Figure 7 shows the procedure for supporting this water intake plan. In this example, a preset water supply plan to a distribution reservoir, a cleaning plan for a filtration reservoir, and various information on each intake well are stored in a data memory, and an intake plan panel is displayed on the display to interactively intake a plan. The method is to proceed with the creation of. FIG. 8 shows a water intake planning panel. The water intake plan panel 13 has a surface water intake plan column 14, an intake pump operation plan column 15, a water intake / water transfer column 16, and a water pond water level column 17. In the water intake / water supply amount column 16, the water supply amount and the required water amount at the time of cleaning the filter basin are displayed based on the water supply plan or the water purification tank cleaning plan. In the surface water intake plan column 14, the priority order of each intake pump is displayed. Further, the plan of the day before is displayed in the surface water intake plan column 14 and the intake pump operation plan column 15 when the preparation of the intake plan is started. In general, the water intake plan does not change much from the previous day, so the plan for the day will be modified to create the plan for the day. Based on the plan displayed in the surface water intake plan column 14 and the intake pump operation plan column 15, the water intake amount and the water level of the water purification pond are simulated, and the results are displayed in the water intake / water flow amount column 16 and the water level of the water purification column 17. To be done. When the surface water intake plan field 14 and the intake pump operation plan field 15 are modified, the display of the intake volume and the water level of the water purification pond is changed in association with the modification. The operator can create a water intake plan while confirming the amount of water intake and the water level of the water treatment pond.

[0006]

In this type of water purification system, the amount of spring water and the intake efficiency (electricity bill) are different in each intake well.
Also, not all intake wells are mobile. Therefore, it is necessary to consider the amount of water that can be taken at each intake well, the original unit price (electricity charge for the amount of water taken), and the movable / dormant state when preparing the operation plan for the intake pump.

In the above-mentioned water intake plan preparation support method, in consideration of this point, water intake well information is prepared in advance so that the operator can refer to it when selecting the water intake well, but depending on the scale of the water treatment plant. Has many intake wells, and it was sometimes difficult to select the water intake well from them in a short time. In addition, when an abnormality such as abnormally low water level occurs in the intake well, it is necessary to change the intake pump operation plan, but in this case it was difficult to change the plan in a short time.

[0008] Further, the amount of spring water in each intake well fluctuates due to changes in the environment such as the season, and the intake well information is not constant. Especially when a large number of intake wells are installed, management of intake well information becomes complicated. Therefore, there is a problem that the current status of the intake well is not always accurately reflected in the intake pump operation plan.

In view of these problems, the present invention provides a device for automatically creating (correcting) an intake well selection plan based on intake well information in the operation management of a water purification system having a plurality of intake wells as a water source. In addition, it is an object of the present invention to provide a device for managing intake well information quickly and accurately.

[0010]

[Means and Actions for Solving the Problems] In the apparatus according to claim 1, referring to preset intake well information, an intake well selection plan for each unit time is created based on the well water intake plan amount for each unit time. Create and modify. When creating an intake well selection plan, it is decided at each time whether or not the current intake well selection plan complies with the well water intake plan amount on the day, and if it does not, the intake well selection plan will be revised. , By repeating this process, an intake well selection plan that complies with the well water intake plan will be created.

That is, first, the well water intake estimation unit determines a well water intake estimated amount by performing a simulation for a certain time based on the intake well selection plan and the possible intake amount of each intake well. Next, the discriminating unit discriminates whether or not it is within the allowable range (the range between the upper limit allowable value and the lower limit allowable value) determined based on the well water intake planned amount, and the well water intake estimated amount matches the well water intake planned amount. Check whether you are doing. As a result, if the estimated well water intake is out of the allowable range, the intake well selection / correction unit will modify the intake well selection plan according to the following criteria. If the estimated well water intake is larger than the allowable range, add the intake wells that are not included in the scope of use. The additional intake well will be selected based on the intake well information. That is, from the movable intake wells, the candidates are listed in descending order of priority, and the well water intake estimates are reselected so that they fall within the allowable range. On the other hand, if the estimated well water intake is less than the allowable range, remove the intake well from which it is used. The intake wells to be removed will be selected according to the order of priority, and the well water intake estimates will be selected within the allowable range.

Further, in the apparatus according to the second aspect, each intake well is provided with various measuring / monitoring means, and the intake well information is updated by fetching the measurement result or the like periodically or when an alarm is received, and at least when the alarm is received. The well selection plan will be reviewed.

That is, a flow meter, a water level meter, and a wattmeter provided in each intake well measure the intake amount, water level, and pump drive power of each intake well, and the original unit price calculation unit measures the intake amount and measurement pump of each intake well. Calculate the original unit price from the driving power. Then, the intake well information correction unit periodically collects these data from each intake well and corrects the possible intake amount and the priority.
Especially by modifying the priority based on the original unit price,
The total amount of electricity required for water intake can be suppressed. In addition, the water level monitoring unit monitors the water level or changes in the water level, and when these are out of the proper range, it recognizes that the intake is inappropriate and issues an alarm. At the time of this warning, the intake well information correction unit corrects the movement / pause of the intake well information, and the well water intake amount estimation unit, the determination unit, and the intake well selection correction unit operate to correct the intake well selection plan, Create an intake well selection plan excluding the intake well. As a result, it is possible to manage and operate the intake plan that reflects the current status of each intake well.

[0014]

【Example】

1. Intake well selection function The control system of the water purification system according to the embodiment of the present invention incorporates a predetermined intake planning function, and particularly incorporates a function of automatically selecting an intake well. This function can be understood as a combination of the means shown in FIG. The intake well information storage unit 18 stores various conditions (intake well information) of each intake well. As shown in FIG. 2, this intake well information includes information such as the possible intake amount (m ³ / h), the water level (m), the priority of use, and the discrimination of the movable state or the idle state. The well water intake amount storage unit 19 stores a well water intake amount table obtained from a water intake plan table and a surface water intake amount table. The intake pump operation plan storage unit 20 stores an intake pump operation plan table. The well water intake amount estimation unit 21 simulates the well water intake amount at each time based on the possible intake amount and the intake pump operation plan. The determination unit 22 compares the estimated well water intake amount at each time with the planned well water intake amount and determines whether or not it is within the allowable range. Intake pump operation plan correction unit 23
Will correct the intake pump operation plan when the estimated well water intake deviates from the allowable range.

Next, the operation of this device will be described. Figure 3
Shows an automatic selection flow of the intake pump. Assuming that the well water intake planned amount at a certain time is X and the allowable error considering the margin of the water purification pond is Δ, the intake lower limit value X ₁ and the intake upper limit value X ₂ are X ₁ = X−Δ and X ₂ = X + Δ. Become. Assuming that the intake pump of the priority order n is W _n , first, the intake pumps W ₁ , W ₂ ... Are picked up in accordance with the priority order and the possible intake amounts are summed (S ₁ , ₂ ), and this total value Q _P is the lower limit value X ₁
Pickup is continued until the value reaches (S3, 4). When the total value Q _P exceeds the intake limit value X ₁ (S3: Yes), in terms of the total value QP and it was confirmed that does not exceed the intake upper limit X ₂ (S5), picked-up intake pump W
Selecting ₁ to _W-P as the operation target (S6). If the total value Q _P exceeds the water intake upper limit X ₂ , the last picked up water intake pump W _P is removed and the next water intake pump W _P is removed.
Pick up _{P + 1} and total available water intake (S7,
8). Then, until the total value R _J exceeds the lower water intake limit X ₁ , W
_{P + 2} , W _{P + 3} ... Are picked up sequentially (S9, 10).
After that, after confirming that the total value R _J does not exceed the water intake upper limit value X ₂ (S11), the water intake pumps W _{1 to} W _P-1 ,
W _{P + 1 to} W _{P + J} are selected as operation targets (S12). At this time, if the total value R _J exceeds the water intake upper limit value X ₂ , a manual change is made (S13).

2. Intake well management function The control system according to this embodiment also has a function of automatically managing intake well information. Each intake well is equipped with an intake well control device for controlling the intake amount, and various information transmitted from each intake well control device is collected by the host device to manage the intake amount information.

FIG. 4 shows an outline of the intake well control device. Two
Is an intake well and 3 is an intake pump. The intake pump 3 is driven by a pump drive circuit (not shown) to pump water from the intake well. The amount of water intake is controlled by adjusting the valve opening of the control valve 25 by the valve opening adjusting circuit 24.

The intake well control device 26 takes in the water level and the intake amount of the intake well and the power consumption of the intake pump 3 from the water level gauge 27, the flow meter 28, and the electric power meter 29 at predetermined time intervals to control the valve opening degree and various types. Performs calculations, etc. In the intake well control device 26, the valve control unit 30 sets the water level taken from the water level gauge 27 to H, and when the water level changes from H ₁ to H ₂ at the time interval T, the following equation (1) is satisfied. To control the valve opening.

(H ₁ −H ₂ ) / T ≦ ΔH (1) Here, ΔH is a constant peculiar to each intake well. By controlling so as to satisfy this equation, the water intake pump 3 can be operated in a range where an extreme drop in water level does not occur. Further, the calculation unit 31 calculates the original unit price A _K and the possible intake amount B _K by performing calculations of the expressions (2) and (3) based on the taken flow rate V, the water level H, and the pump power K.

A _K = K / V (2) B _K = V (3) The original unit price A _K and the available water intake B _K thus obtained are controlled by the communication control unit (not shown) by the host device. To transmit. The host device updates the intake well information based on the received information. At this time, the priority is reset according to the original unit price A _K.

Further, the water level of the intake well is constantly monitored by the water level monitoring unit 32, and when the water level falls below the lower limit threshold value,
Alternatively, when the equation (1) cannot be satisfied, a water level alarm is transmitted to the host device. When this water level alarm is received, the host device corrects the determination of whether the intake well is moving or stopped, and reselects the intake pump using the intake well selection function described above, and removes the intake well. To create. If the number of intake wells is large, it is possible that the intake wells with low priority will be used very infrequently.In such cases, the intake pumps with low use frequency should be operated periodically for a short period of time. It is also possible to adopt a mode of collecting intake well information.

[0022]

As described above, according to the present invention,
The well water intake will be simulated based on the intake well information, and the intake well selection plan will be created based on this result, allowing automatic creation of the intake well selection plan. As a result, it becomes possible to draw up an intake well selection plan in a short time in consideration of the intake well capacity and unit price of each intake well, and the burden on the operator is reduced. It also has the advantage of being able to easily and promptly deal with changes in the intake well during operation.

Furthermore, predetermined information is collected for each intake well to calculate the original unit price and the possible intake amount, and the intake well information is updated regularly based on the results, and the water level and changes in water level are monitored. As a result, the determination of whether the intake well information is movable or stopped will be corrected, which will enable automatic management of the intake well information. Therefore, not only the work of updating the intake well information can be omitted to reduce the burden on the operator, but also the situation of the intake well, which fluctuates according to environmental changes, can always be accurately grasped and proper intake control can be realized. In particular, the priority of each intake well is determined based on the original unit price, and the intake wells are selected in accordance with this priority, which has the advantage of suppressing the amount of electricity in all intake wells.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of an intake well selection function according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a water intake information table.

FIG. 3 is a flowchart showing a procedure for selecting a water intake pump.

FIG. 4 is a block diagram showing an outline of an intake well control device.

FIG. 5 is a block diagram showing an outline of a water purification system.

FIG. 6 is a flowchart showing a water operation planning procedure.

FIG. 7 is a flowchart showing a procedure for supporting a water intake plan.

FIG. 8 is an explanatory diagram showing a water intake planning panel.

[Explanation of symbols]

2… Intake well 3 ... Intake pump 18 ... Intake well information storage 19 ... Well water intake storage 20 ... Intake pump operation plan storage 21 ... Well water intake estimation section 22 ... Judgment unit 23 ... Intake pump operation plan correction section 27 ... Water gauge 28 ... Flowmeter 29 ... Power meter 30 ... Valve control unit 31 ... Calculation unit 32 ... Water level monitoring unit

Claims (2)

[Claims] 1. A control system for a water purification system that takes raw water from a water source including a plurality of intake wells, performs a water purification treatment on the raw water, stores the water in a water purification pond, and sends the water from the water purification pond to each distribution reservoir. Then, in the device that creates and modifies the intake well selection plan for each predetermined time based on the well water intake planned amount for each predetermined time, the items of possible intake amount, priority order, movable / suspended judgment for each preset intake well The intake well information storage section that stores the intake well information, including the intake well information storage section, and the well water intake estimation section that determines the estimated intake quantity for each intake well and the estimated well water intake for each predetermined time from the intake well selection plan The judgment unit that judges whether the well water intake is within the allowable range based on the planned amount and the judgment result of this judgment unit operates to correct the intake well selection plan by referring to the intake well information. If the estimated amount of in-door water intake is larger than the allowable range, add the movable intake wells that are out of use according to the priority, and if the estimated amount of well water intake is smaller than the allowable range, select the intake wells to be used. An intake well selection device comprising: an intake well selection correction unit that removes an intake well from a target according to the order of priority. 2. From a flow meter and a water level meter for measuring the intake amount and water level of each intake well, a power meter for measuring the pump driving power of each intake well, and a measured intake amount of each intake well and the measured pump driving power. A unit price calculation unit that calculates the unit price, a water level monitoring unit that monitors the measured water level of each intake well and notifies you of an alarm if the water level or the change in the water level is outside the appropriate range, and various measurement results of each intake well and the unit price of the intake unit. This is to correct the intake well information at the time of periodic collection or at the time of receiving an alarm.The possible intake amount is corrected based on the measured intake amount, the priority order is corrected based on the original unit price, and the alarm is issued based on the alarm. It is provided with an intake well information correction unit that corrects the determination of whether to move or stop, and at least when the alarm is received, the well water intake estimation unit, the determination unit, and the intake well selection correction unit are operated to correct the intake well selection plan. When The intake well selection device according to claim 1.