JP2001042903A - Rainwater drainage controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rainwater drainage controller which performs control for reducing non-point sources by always excellently maintaining the quality of water discharged from drainage facilities to a public irrigation. SOLUTION: This rainwater drainage controller 20 controls a rainwater discharge device 15 which discharges rainwater from a reservoir part 4 where rainwater is temporarily stored by using a pump 6. The rainwater drainage controller 20 is equipped with a turbidity measuring means 30 which measures the turbidity C of the liquid phase in the reservoir part 4 and a state estimation part 31 which estimates a state regarding the rainwater discharge device 15 according to the turbidity C measured by the measuring means 30. A pump controller 32 controls the pump 6 according to the state measured by the estimation part 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stormwater drainage control device for a sewage facility into which stormwater is mixed, such as an inflow pipe, a pump well, a pump station, a stormwater reservoir, a stormwater storage pipe, etc., of a sewage treatment plant. TECHNICAL FIELD The present invention relates to a rainwater drainage control device that performs control such that the quality of water discharged from public sewerage facilities to rivers, lakes, sea areas, and other public waters is always maintained in a good condition and non-point sources (non-specific pollution sources) are reduced.

[0002]

2. Description of the Related Art FIG. 8 is a schematic diagram showing the configuration of another rainwater drainage control device for a sewer proposed by the present inventors before the present invention.

[0003] As shown in FIG.
The sewer pipe 51 is connected to the side wall of the sand basin 53. The settling basin 53 is adjacent to the pump well 54 on the side facing the sewer pipe 51. The sedimentation basin 53 is formed in such a manner that the screen 52 is inclined such that the upper side thereof falls down to the pump well 54 side.
It is erected inside.

[0004] A water level gauge 55 is installed in the pump well 54, and the water level gauge 55 is connected to a control unit 62. A pipe 59 extends from near the bottom of the pump well 54, and is provided with a pump 57 and branches into a pipe 60 and a pipe 61. The pipe 60 is connected to a river 63 via a control valve 58, and the pipe 61 is first connected to a sedimentation basin 64. The pump 57 and the valve 58 are connected to the control unit 62, respectively. Further, a ground rain gauge 71 is connected to the control unit 62.

The control unit 62 will be described with reference to FIG. As shown in FIG. 9, the control unit 62 controls the inflow amount calculation unit 7.
3 and a rainfall amount calculation unit 74. Inflow amount calculation unit 7
Reference numeral 3 denotes a circuit configured to convert the water level value H of the water level meter 55 into an inflow amount Q using a QH curve or the like.
On the other hand, the rainfall calculation unit 74 is configured by a circuit that calculates a rainfall value of the ground rain gauge 71 into a rainfall.

The rainfall amount calculation section 74 is connected to a rainfall amount prediction section 75. The rainfall amount predicting unit 75 includes the rainfall amount calculating unit 7
With the rainfall calculated by 4 as an input value, a future rainfall is predicted and calculated by a nonlinear prediction model determined by model identification or the like.

The inflow amount calculation section 73 and the rainfall amount prediction section 75 are connected to an inflow amount prediction section 76. The inflow amount prediction unit 76 uses a non-linear B1ock-oriented model (a combination of a linear transfer function and a non-linear element in an arbitrary number and an arbitrary arrangement) or the like, and the like.
5 and the inflow rate calculation unit 73
The inflow amount predicted value is calculated using the inflow amount calculated by the above as an input value.

The configurations and internal algorithm formulas of the inflow amount calculation unit 73, the rainfall amount calculation unit 74, the rainfall amount prediction unit 75, and the inflow amount prediction unit 76 are described in Japanese Patent Application No. 10-224766.
This is described in detail in the issue “Rainwater inflow prediction device and rainwater inflow prediction method”.

An inflow water quality prediction section 77 is further connected to the inflow amount prediction section 76. The inflow water quality prediction unit 77 performs an inflow water quality prediction calculation using the predicted inflow amount Q output by the inflow amount prediction unit 76 as an input value.

The inflow amount prediction section 76 and the inflow water quality prediction section 77 are connected to a pipe water quality change prediction section 78a (pipe water quality prediction section). In the tube quality change prediction unit 78a, as an input value the predicted rainwater inflow Q inflow water predictive value C _1, calculates the tube quality changes predictive value C _2.

A rainwater drainage control unit 78b is connected to the in-pipe water quality change prediction unit 78a.
Is composed. Rainwater discharge control unit 78b has an output value C ₂ in the canal water quality change prediction unit 78a as an input value, FIG. 1
ON of the pump 57 and the valve 58 by the algorithm shown in FIG.
-OFF control is performed.

The rainwater drainage control device having such a configuration operates as follows.

During normal non-rainy weather, only sewage flows in the sewage pipe 51, and the sewage flows through the screen 52 and the sand basin 5.
3. Pass through the pump well 54 sequentially. During rainy weather, rainwater flows into the sewer pipe 51 and is mixed with the sewage. On the other hand, the operation of the pump 57 and the opening and closing of the valve 58 are controlled by the control unit 62 based on the measurement value of the water level gauge 55 and the rainfall value of the ground rain gauge 71.

In the control section 62, the inflow amount calculation section 73 first calculates the inflow amount Q from the water level value H of the water level meter 55, and the rainfall amount calculation section 74 calculates the rainfall amount from the rainfall value of the above-ground rain gauge 71. Next, the rainfall prediction unit 75 predicts and calculates a future rainfall from the rainfall calculated by the rainfall calculation unit 74.

Subsequently, the inflow amount predicting section 76 determines the nonlinear B1
The inflow amount prediction value is calculated using an ock-oriented model or the like. Further inflow water predictor 77 performs inflow water predictive calculation as an input value the predicted flow rate Q to be output by the inflow amount prediction unit 76, further tube quality change prediction unit 78a for calculating the flowing water predictive value C ₁ is, as input values the predicted inflow Q inflow water predictive value C _1, it calculates the tube quality changes predictive value C _2. Thereafter, the rainwater drainage control unit 78
b is the output value _{C 2} in the canal water quality change prediction unit 78a as an input value, performing the ON-OFF control of the pump 57 and the valve 58 by the algorithm of Figure 10.

According to the above rainwater drainage control device,
It does not cause initial rain pollution (first flash) and can always maintain good drainage water quality.

The details of the rainwater drainage control device 50 are described in Japanese Patent Application No. 11-43796.

[0018]

However, the rainwater drainage control device 50 includes a rainfall prediction unit 75, an inflow prediction unit 76, an inflow water quality prediction unit 77, and an in-pipe water quality change prediction unit 7.
Since there are four prediction units 8a and many prediction operations are performed, the error becomes very large.

Therefore, in the rainwater drainage control unit 78b,
Inappropriate control may be performed, that is, drainage water having deteriorated quality may be drained to the river 63 or the pump well 54
However, there is a problem that water is flooded.

On the other hand, if the storage time of the rainwater in the pump well 54 is prolonged, the odor component contained in the stored rainwater may rot. As the odor component decomposes, in addition to the problem of deterioration in the quality of the stored water, the pump well 54 deteriorates the atmospheric environment due to the generation of odorous gas from the gas phase part, and the pump well 5
4. Problems such as corrosion and deterioration of the pipe 59 and the pump 56 occur.

The present invention has been made in view of the above points, and always maintains a good quality of water discharged from sewerage facilities to public waters such as rivers, lakes, sea areas, etc., and provides a non-point source. It is an object of the present invention to provide a rainwater drainage control device that performs control to reduce (non-specific pollution sources).

[0022]

SUMMARY OF THE INVENTION The present invention relates to a rainwater drainage control device for controlling a rainwater drainage device for discharging rainwater by using a pump from a storage portion for temporarily storing rainwater. A turbidity measuring unit for measuring the turbidity of the phase, a state estimating unit for estimating a state of the rainwater drainage device based on the turbidity measured by the turbidity measuring unit, and a pump based on the state estimated by the state estimating unit. And a pump control device for controlling the rainwater drainage.

According to the present invention, the state of the rainwater drainage device is estimated based on the turbidity of the liquid phase in the storage portion using the correlation between the turbidity of the liquid phase in the storage portion and the state of the rainwater drainage device. As a result, the pump is controlled, so that effective pump control can be realized.

The present invention is also a rainwater drainage control device for controlling a rainwater drainage device for discharging rainwater from a storage portion for temporarily storing rainwater by using a pump, wherein the temperature of a liquid phase in the storage portion is measured. A temperature measuring unit, a state estimating unit for estimating a state of the rainwater drainage device based on the temperature measured by the temperature measuring unit, and a pump control device for controlling the pump based on the state estimated by the state estimating unit. It is a rainwater drainage control device provided with:

According to the present invention, the state of the rainwater drainage device is estimated based on the temperature of the liquid phase in the storage portion using the correlation between the temperature of the liquid phase in the storage portion and the state of the rainwater drainage device. Since the pump is controlled, effective pump control can be realized.

The present invention also relates to a rainwater drainage control device for controlling a rainwater drainage device for discharging rainwater from a storage portion for temporarily storing rainwater by using a pump, wherein a component change in a liquid phase in the storage portion is provided. , A state estimating unit for estimating a state of the rainwater drainage device based on the component change measured by the component change measuring unit, and a pump for controlling the pump based on the state estimated by the state estimating unit. And a control device.

According to the present invention, the state related to the rainwater drainage device is determined based on the component change in the liquid phase in the storage portion by utilizing the correlation between the component change in the liquid phase in the storage portion and the state related to the rainwater drainage device. Is estimated to control the pump, so that effective pump control can be realized.

The present invention also relates to a rainwater drainage control device for controlling a rainwater drainage device for discharging rainwater from a storage portion for temporarily storing rainwater by using a pump, wherein the substance concentration in the gas phase in the storage portion is controlled. , A state estimating unit for estimating the state of the rainwater drainage device based on the substance concentration measured by the concentration measuring unit, and a pump control device for controlling the pump based on the state estimated by the state estimating unit And a rainwater drainage control device.

According to the present invention, the state of the rainwater drainage device is determined based on the concentration of the substance in the gas phase in the storage portion by utilizing the correlation between the concentration of the substance in the vapor phase in the storage portion and the state of the rainwater drainage device. Is estimated to control the pump, so that effective pump control can be realized.

[0030]

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

FIG. 1 is a schematic diagram showing the configuration of a rainwater drainage control device for sewerage according to a first embodiment of the present invention. As shown in FIG. 1, a stormwater drainage control device 20 of a sewer according to the first embodiment of the present invention is provided for a rainwater drainage device 15.

The rainwater drainage device 15 shown in FIG.
It has a sedimentation basin 3 connected to the sewer pipe 1 at the side wall.

The settling basin 3 is adjacent to the pump well 4 (reservoir) on the side facing the sewer pipe 1. The screen 2 is erected in the sand basin 3 in such a manner that its upper side is inclined toward the pump well 4. Turbidimeter 3 in pump well 4
0 (turbidity measuring means) is installed, and the turbidity meter 30 is connected to the control unit 12.

On the other hand, a pipe 9 extends from the vicinity of the bottom of the pump well 4, and is provided with a pump 6 and branches into a pipe 10 and a pipe 11. The pipe 10 is connected to the river 1 via the control valve 7
The pipe 11 is connected via a control valve 8 to a treatment plant first settling basin 14. The pump 6 and the valves 7 and 8 are connected to the control unit 12, respectively.

The control unit 12 estimates an inflow amount [Q] to the pump well 4 as a state relating to the rainwater drainage device 15 and an inflow amount [Q] estimated by the inflow amount estimation unit 31. And a pump control unit 32 that controls the pump 6 and the control valves 7 and 8.

The present inventor has determined that the rainfall intensity R during a certain rainfall,
It has been found that the general relationship between the inflow amount [Q] and the turbidity C can be represented in a trend graph as shown in FIG. Based on this knowledge, the inflow estimation unit 31 utilizes the fact that the rate of increase or decrease dC / dt and the maximum value Cmax of the turbidity C of the liquid phase in the pump well 4 are correlated with the inflow [Q], Inflow [Q]
Is estimated.

The inflow rate estimating section 31 of the present embodiment specifically performs an inflow rate estimation calculation by dividing a series of states from the start to the end of rainfall into five stages as follows. Has become.

First, when the turbidity C is higher than the fine weather and is increasing, that is, (C> Cc + k1) and
When (dC / dt ≧ 0), [Qr] = m1 · | dC / dt | max. . . . . . . . . (1) Equation [Q] = [Qr] + Qc. . . . . . . . . . . . . . Equation (2)

Second, when the turbidity C is higher than that in fine weather and is decreasing, that is, (C> Cc + k1) and
(DC / dt <0), [Qr] = m2 · Cmax. . . . . . . . . . . . . (3) Formula [tr] max = m3 · | dC / dt | max. . . . . . . (4) Equation [Qr] = [Qr] t−1 · ([Qr] max− [Qr] t−1) / ([tr] max−t). . (5) Equation [Q] = [Qr] + Qc. . . . . . . . . . . . . . . Equation (6)

Third, when the turbidity C is lower than that in fine weather and is decreasing, that is, (C ≦ Cc + k1) and
When (dC / dt <0), [Qr] = m4 · (Cc / C) · Qc. . . . . . . . . (7) Equation [Q] = [Qr] + Qc. . . . . . . . . . . . . . Equation (8)

Fourth, when the turbidity C is lower than that in fine weather and is increasing, that is, (C ≦ Cc−k2) and
(DC / dt ≧ O), [Qr] = m5 · (Cc / C) · Qc. . . . . . . . . (9) Equation [Q] = [Qr] + Qc. . . . . . . . . . . . . Equation (10)

Fifth, when the turbidity C returns to substantially the same level as that in fine weather, that is, when (Cc−k2 <C ≦ Cc + k1), [Q] = Qc. . . . . . . . . . . . . . . . . . . Equation (11)

The meanings of the symbols in the above formulas are as follows. FIG. 3 is a diagram for supplementarily explaining the meaning of each symbol.
Shown in

[Q]: Estimated value of inflow (output value) [Qr]: Estimated value of rainwater inflow (output value) [Qr] max: Estimated value of maximum inflow of rainwater [tr] max: Maximum inflow of rainwater Estimated value of time [Qr] t-1: Estimated value of rainwater inflow before one step [tr] t-1: Estimated value of rainwater inflow time one step before Qc: Inflow of sewage in clear weather (constant) C: Turbidity (input value) Cc: turbidity in clear weather (constant) Cmax: maximum turbidity k1: turbidity correction parameter (constant) k2: turbidity correction parameter (constant) m1: rainwater inflow calculation correction parameter (constant) m2 : Rainwater inflow calculation correction parameter (constant) m3: Rainwater inflow calculation correction parameter (constant) m4: Rainwater inflow calculation correction parameter (constant) m5: Rainwater inflow calculation correction parameter (constant)

As described above, the estimation calculation of the inflow amount [Q] is performed in the early stages of rain (the first and second stages described above) in which the pollutant outflow phenomenon (first flash) occurs at the beginning of rainfall, and Different arithmetic expressions are used in the rainy-dilution stage for diluting the sewage (the third and fourth stages). That is, in the former stage, the inflow amount [Q] is estimated from the turbidity increase / decrease speed dC / dt and the maximum value Cmax, but in the latter stage, the rainy turbidity C and the fine weather turbidity Cc
The inflow amount [Q] is estimated from the ratio of the inflow amount [Q].

In addition, the inflow amount estimating unit 31 of the present embodiment
Is configured to determine the presence or absence of rainfall based on the turbidity C. The rainfall determination can be performed by employing various known determination methods.

The pump control unit 32 controls the pump 6 and the control valves 7 and 8 so as to discharge a fixed amount of water in accordance with the discharge target value (constant pumping amount control). A pump control target value correction unit 34 for correcting a discharge target value in the control main unit 33 based on the estimated inflow amount [Q].

Next, the operation of the present embodiment having such a configuration will be described with reference to FIG.

As shown in FIG. 4, when the turbidity C is measured by the turbidity meter 30 (STEP 1), the inflow estimation unit 31
In the rainfall determination based on the turbidity C is performed (STEP
2).

When it is determined that there is no rainfall, the control target value correction unit 34 does not operate and the control main unit 33 does not operate irrespective of the inflow estimation value [Q] estimated by the inflow estimation unit 31.
Is maintained at the emission target value [Qsv] t-1 one step before ([Qsv] t =
[Qsv] t-1) (STEP 3).

If it is determined that there is rainfall, the control target value correction unit 34 corrects the correction value [Qmv] based on the inflow estimation value [Q] (STEP 4) calculated by the inflow estimation unit 31.
Is calculated. In this case, using the correction parameter a,
[Qmv] = a · [Q] is calculated (STEP 5).

Further, the control target value correcting section 3 of the present embodiment.
No. 4 compares the value of turbidity C with the reference turbidity Csv (ST
EP6).

If C <Csv (at this time, the control main unit 34
The valve 7 or the valve 8 is opened), [Qsv] t = [Qsv] t-1 +
The emission target value is corrected as [Qmv] (STEP
7).

If C ≧ Csv (at this time, valves 7 and 8 are still
Is not released), the second correction parameter b smaller than a
After calculating [Qmv] = b · [Q] using (b <a) (STEP 8), [Qsv] t = [Qsv] t−1 +
The emission target value is corrected as [Qmv] (STEP
7).

The correction parameter a and the second correction parameter b are set to such values that the quality of the discharged water does not deteriorate and that the rainwater drainage device 15 such as the pump well 4 does not flood.

As described above, according to the present embodiment, the correlation between the turbidity C of the liquid phase in the pump well 4 and the inflow amount [Q] (see FIGS. 2 and 3) is used. The inflow estimation unit 31 estimates the inflow [Q] based on the turbidity C of the liquid phase in the pump well 4, and the pump control unit 32 determines the pump 6 and the control valves 7, 8 based on the inflow [Q]. , Effective pump control can be realized.

According to the present embodiment, the pump well 4
Since the inflow rate [Q] is estimated from the turbidity C of the liquid phase inside using the above equations (1) to (11), the estimation accuracy of the inflow rate [Q] is high, and consequently pump control is performed. Operation can be performed stably.

Further, according to the present embodiment, only the inflow amount estimating unit 31 performs the prediction calculation, and since the occurrence of errors is suppressed as compared with the conventional control method, the accuracy of the pump control is high. .

According to the present embodiment, the control of the pump 6 is stabilized without "fluttering" by employing the so-called constant pumping amount control method. Further, the correction calculation by the control target value correction unit 34 can be easily performed.

Further, by comparing the turbidity C with the reference turbidity Csv and opening and closing the valves 7 and 8, the quality of the water discharged from the river can be improved.

Incidentally, the turbidity C is determined by SS (floating substance) or B
Since there is a correlation with OD and COD, it is also possible to use a control method based on another water quality standard.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a schematic diagram of a rainwater drainage control device for sewerage according to the second embodiment.

As shown in FIG. 5, the rainwater drainage control device 20 of the present embodiment has a thermometer 40 instead of the turbidity meter 30.
Except for having (temperature measuring means), the configuration is the same as that of the first embodiment shown in FIG. In the second embodiment, the same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

The thermometer 40 is connected to the control unit 12, and the inflow rate estimating unit 31 of the present embodiment determines the pump well based on the temperature of the liquid phase in the pump well 4 measured by the thermometer 40. 4 is estimated. This takes advantage of the fact that the temperature of the rainwater is usually lower than the temperature of the sewage in the drain 1.

Specifically, the above equations (1) to (11)
In the above, the turbidity C is set to a temperature drop T from the reference temperature, and the increase / decrease rate dC / dt of the turbidity C is set to a rate dT /
dt, the fine weather turbidity Cc is replaced with the fine weather reduced temperature Tc, the maximum turbidity Cmax is replaced with the maximum reduced temperature Tmax, and the values of the parameters k1, k2, m1 to m5 are appropriately changed. The inflow amount [Q] is calculated using the equation.

According to the present embodiment, utilizing the correlation between the temperature of the liquid phase in the pump well 4 and the inflow amount [Q], the inflow amount [Q] is determined based on the temperature of the liquid phase in the pump well 4. Q] is estimated to control the pump 6 and the control valves 7, 8, so that effective pump control can be realized.

Next, a rainwater drainage control device for a sewer according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a schematic diagram of a rainwater drainage control device for sewerage according to the third embodiment.

As shown in FIG. 6, the rainwater drainage control device 20 of the present embodiment has a dissolved oxygen concentration meter 41 (component change measuring means) in place of the turbidity meter 30 except for the turbidity meter 41 shown in FIG. The configuration is the same as that of the first embodiment. In the second embodiment, the same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

The dissolved oxygen concentration meter 41 is connected to the control unit 12, and the inflow rate estimation unit 31 according to the present embodiment provides the dissolved oxygen concentration of the liquid phase in the pump well 4 measured by the dissolved oxygen concentration meter 41. Based on DO, the inflow amount [Q] to the pump well 4 is estimated. This utilizes the fact that the concentration of dissolved oxygen DO in the liquid phase of the pump well 4 increases due to the flow of rainwater in the drain pipe 1 when rainwater flows in.

Specifically, the above equations (1) to (11)
In the above, the turbidity C is set to the dissolved oxygen concentration DO, and the increase / decrease rate dC / dt of the turbidity C is set to the increase / decrease rate dDO /
In dt, clear weather turbidity Cc is converted to clear dissolved oxygen concentration DOc
In addition, the maximum turbidity Cmax is replaced with the maximum dissolved oxygen concentration DOmax, and the parameters k1, k2, m
The inflow amount [Q] is calculated using an expression obtained by appropriately changing the values of 1 to m5.

According to the present embodiment, the correlation between the dissolved oxygen concentration of the liquid phase in the pump well 4 and the inflow rate [Q] is used to determine the dissolved oxygen concentration of the liquid phase in the pump well 4. Thus, the pump 6 and the control valves 7, 8 are controlled by estimating the inflow amount [Q], so that effective pump control can be realized.

In this embodiment, the dissolved oxygen concentration is measured in order to measure a change in the liquid phase component in the pump well 4. However, instead of the dissolved oxygen concentration, the flow rate into the pump well 4 is measured. Another component change amount correlated with [Q] may be measured.

For example, it is effective to measure the oxidation-reduction potential (ORP). This is because the oxidation-reduction potential follows a change in the dissolved oxygen concentration DO.

It is also effective to measure the hydrogen ion concentration (pH). The pH of recent rainwater is 3-6,
This is because the pH of the liquid phase in the pump well 4 decreases due to the inflow of rainwater.

Further, the concentration of water such as UV, COD, BOD and the like also changes substantially in the same manner as the turbidity C when rainwater flows. Therefore, these measurements are also effective.

Other components that are contained in rainwater
Measurement of NOx, SOx, and other inorganic and organic substances is also effective.

As for the various component change amounts mentioned above, each measured value can be used alone for control, and two or more amounts can be used in combination. It is also possible to use the pump well 4 in combination with the turbidity C and temperature.

Further, in each of the above embodiments, the flow rate [Q] into the pump well 4 is used as the state relating to the rainwater drainage device 15, but the rainwater flow rate [Qr],
The water level, rainfall intensity, amount of rainfall, no rainfall time, temperature, pressure, wind direction, wind speed, etc. of the pump well 4 can be used alone or in combination.

The above equations (1) to (11) can be changed by a more detailed pattern analysis of the measured values. Conversely, it can be changed to a simple formula using only the absolute value of the measured value. Similarly, a quadratic function, a logarithmic function, an exponential function, a linear model, a non-linear model, and the like can be appropriately used as the calculation formula of the correction value by the pump control target value correction unit 34.

As for the control method of the pump 6, it is a matter of course that, besides the constant pumping amount control, a constant water level control and a mode in which the water level and the pumping amount are controlled in a complex manner can be appropriately adopted. .

Next, a rainwater drainage control device for a sewer according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a schematic diagram of a rainwater drainage control device for sewerage according to the fourth embodiment.

As shown in FIG. 7, in the rainwater drainage control device 20 of the present embodiment, instead of the turbidity meter 30, a hydrogen sulfide meter 45 (concentration measuring means) is provided with a sulfide in the gas phase in the pump well 4. It is provided for measuring the hydrogen concentration. Further, instead of the inflow amount estimating unit 31, a storage time estimating unit 37 for estimating the storage time of rainwater in the pump well 4 is provided.

The other structure is the same as that of the first embodiment shown in FIG. In the second embodiment,
The same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

The hydrogen sulfide meter 45 is connected to the control unit 12. The storage time estimating unit 37 of the present embodiment measures the hydrogen sulfide concentration in the gas phase in the pump well 4 measured by the hydrogen sulfide meter 45. Based on this, the storage time of rainwater in the pump well 4 (for example, the storage time from when the rainwater inflow stops) is estimated. This utilizes the fact that the concentration of hydrogen sulfide in the gas phase of the pump well 4 is substantially proportional to the storage time of the rainwater in the pump well 4.

The control target value correction section 34 of the present embodiment
Based on the rainwater storage time estimated from the hydrogen sulfide concentration, a correction value for increasing the pumping amount when the storage time is long is sent to the control main unit 33.

According to the present embodiment, the storage time of rainwater in the pump well 4 can be optimized.

Further, according to the present embodiment, the mechanical equipment such as the pump 6, the pipe 9,
It is also possible to diagnose corrosion and deterioration of piping equipment such as 10, 11 and civil engineering equipment such as the pump well 4.
This is because these corrosion and deterioration properties are substantially proportional to the concentration of hydrogen sulfide in the gas phase of the pump well 4.

It is also effective to measure the concentration of various substances in the gas phase in the pump well 4 instead of the hydrogen sulfide concentration. For example, each concentration of oxygen, carbon dioxide, odorous gas, methane, methyl mercaptan, ammonia, methyl sulfide, trimethylamine, dimethyl methyl, acetaldehyde, styrene, etc. Since there is a correlation with the degree of corrosion of each part of the drainage device, the same control as in the present embodiment can be realized.

For the various substance concentrations mentioned above, each measured value may be used alone, or two or more amounts may be used in combination.

In the present embodiment, the storage time of the rainwater in the pump well 4 is used as the state relating to the rainwater drainage device 15, but the inflow amount [Q] into the pump well 4 and
Rainwater inflow [Qr], water level of pump well 4, rainfall intensity,
The amount of rainfall, no rainfall time, the degree of corrosion of the pump equipment 6, 7, 8 and the degree of corrosion of the pump well 4, the degree of corrosion of each of the pipes 1, 9, and 10 can be used alone or in combination.

[0091]

As described above, according to the present invention,
Using the correlation between the turbidity of the liquid phase in the reservoir and the state of the rainwater drainage device, the pump is controlled by estimating the state of the rainwater drainage device based on the turbidity of the liquid phase in the reservoir. Pump control can be realized.

Further, according to the present invention, the state of the rainwater drainage device is estimated based on the temperature of the liquid phase in the storage portion using the correlation between the temperature of the liquid phase in the storage portion and the state of the rainwater drainage device. Therefore, effective pump control can be realized.

Further, according to the present invention, the rainwater drainage device is provided based on the component change in the liquid phase in the storage portion by utilizing the correlation between the component change in the liquid phase in the storage portion and the state of the rainwater drainage device. In order to estimate the state and control the pump,
Effective pump control can be realized.

Further, according to the present invention, the rainwater drainage device is provided based on the concentration of the substance in the gas phase in the storage portion by utilizing the correlation between the concentration of the substance in the gas phase in the storage portion and the state of the rainwater drainage device. In order to estimate the state and control the pump,
Effective pump control can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a stormwater drainage control device according to a first embodiment of the present invention.

FIG. 2 is a graph showing an example of the relationship between rainfall intensity, inflow, and turbidity during rainfall.

FIG. 3 is a supplementary explanatory diagram of symbols of a model expression representing a relationship between an inflow amount and turbidity.

FIG. 4 is a flowchart for explaining the operation of the rainwater drainage control device of FIG. 1;

FIG. 5 is a schematic configuration diagram illustrating a stormwater drainage control device according to a second embodiment of the present invention.

FIG. 6 is a schematic configuration diagram illustrating a stormwater drainage control device according to a third embodiment of the present invention.

FIG. 7 is a schematic configuration diagram showing a rainwater drainage control device according to a fourth embodiment of the present invention.

FIG. 8 is a schematic configuration diagram showing another rainwater drainage control device.

FIG. 9 is a schematic block diagram illustrating a configuration of a control unit in FIG. 8;

FIG. 10 is a flowchart showing the operation of the control unit in FIG. 8;

[Description of Signs] 1 Sewer pipe 2 Screen 3 Sediment basin 4 Pump well 6 Pump 7, 8 Control valve 9, 10, 11 Pipe 12 Control unit 13 River 14 First sedimentation tank 30 Turbidity meter 31 Inflow estimation unit 32 Pump control Unit 33 control main unit 34 control target value correction unit 37 storage time estimation unit 40 thermometer 41 dissolved oxygen concentration meter 45 hydrogen sulfide meter

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Norihisa Kaminishi 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu Plant, Toshiba Corporation (72) Inventor Masashiro Nakata 1-1-1, Shibaura, Minato-ku, Tokyo Toshiba Corporation Head Office (72) Inventor Kazuhiro Horie 1-1-1, Shibaura, Minato-ku, Tokyo F-term (Reference) 2D063 AA07 DC06 3H045 AA23 BA00 CA00 CA29 DA01 EA34 5H004 GB08 HA02 HB01 HB04 HB05 HB20 JA13 JB30 KA03 KC22 KC23 KC27 9A001 BB06 GG01 HH34 KK37

Claims (7)

[Claims] 1. A rainwater drainage control device for controlling a rainwater drainage device for discharging rainwater from a storage portion for temporarily storing rainwater by using a pump, wherein the turbidity measuring a turbidity of a liquid phase in the storage portion. A degree estimating unit, a state estimating unit that estimates a state of the rainwater drainage device based on the turbidity measured by the turbidity measuring unit, a pump control device that controls the pump based on the state estimated by the state estimating unit, A rainwater drainage control device comprising: 2. A rainwater drainage control device for controlling a rainwater drainage device for discharging rainwater from a storage portion for temporarily storing rainwater by using a pump, wherein a temperature measurement for measuring a temperature of a liquid phase in the storage portion. Means, a state estimating unit for estimating a state of the rainwater drainage device based on the temperature measured by the temperature measuring unit, and a pump control device for controlling the pump based on the state estimated by the state estimating unit. A rainwater drainage control device characterized by the following. 3. A rainwater drainage control device for controlling a rainwater drainage device for discharging rainwater from a storage part for temporarily storing rainwater by using a pump, wherein a component change in a liquid phase in the storage part is measured. A component change measuring unit, a state estimating unit that estimates a state of the rainwater drainage device based on the component change measured by the component change measuring unit, and a pump control device that controls the pump based on the state estimated by the state estimating unit. And a rainwater drainage control device. 4. The rainwater drainage control device according to claim 1, wherein the state regarding the rainwater drainage device estimated by the state estimation unit is an inflow amount into the storage unit. 5. A rainwater drainage control device for controlling a rainwater drainage device for discharging rainwater from a storage part for temporarily storing rainwater by using a pump, wherein a substance concentration in a gas phase in the storage part is measured. A concentration measuring unit, a state estimating unit that estimates a state of the rainwater drainage device based on the substance concentration measured by the concentration measuring unit, and a pump control device that controls the pump based on the state estimated by the state estimating unit. A rainwater drainage control device comprising: 6. The rainwater drainage control device according to claim 5, wherein the state regarding the rainwater drainage device estimated by the state estimation unit is a storage time of the rainwater in the storage unit. 7. A control unit for controlling a pump according to a target discharge amount, and a target discharge value in the control main unit is corrected based on a state of the rainwater drainage device estimated by the state estimating unit. The rainwater drainage control device according to any one of claims 1 to 6, further comprising a control target value correction unit.