JP4094584B2 - Operation support device for membrane filtration equipment - Google Patents

Description

  The present invention relates to an operation support apparatus for a membrane filtration treatment apparatus for a water purification plant that is installed for separating and removing turbid substances and pathogenic protozoa contained in raw water.

  In the membrane filtration apparatus, clogging occurs due to a wet cake made of turbidity or organic matter in a filtration process for filtering and purifying water, and the transmembrane pressure difference increases as the total amount of filtrate water increases. In order to reduce the transmembrane pressure difference and restore the filtration flow rate, the filtrate is backflowed in the backwashing step to remove the cake adhering to the membrane. In the process of purifying the raw water, this filtration step and backwashing step are repeated. If the transmembrane pressure does not return to the specified value even after backwashing, perform chemical cleaning. If the transmembrane pressure does not return to the specified value even after performing chemical cleaning, the membrane module. Replace. The filtration time and backwash time are often set as constant values by a timer. Filtration time: about 30 to 90 minutes, backwash time: about 15 to 30 seconds are often seen.

  In water purification plants using surface water as raw water, a pretreatment device having the ability to remove turbidity is often provided upstream of the membrane filtration treatment device. In a typical coagulation-precipitation treatment as a pretreatment, a flocculant is injected into raw water to precipitate and remove turbidity and organic matter. Since this process can reduce the water quality load applied to the subsequent membrane filtration treatment apparatus, it can be expected to suppress clogging of the membrane filtration treatment apparatus and reduce the power cost.

  Compared with the conventional coagulation sedimentation filtration process, the membrane filtration process consumes a large amount of power. The device that consumes the most power in the membrane filtration apparatus is a pump that applies filtration pressure to the membrane. The power consumed by the pump is proportional to the transmembrane pressure difference. In general, the membrane filtration apparatus is operated at a constant flow rate. In that case, the transmembrane pressure difference gradually increases until the backwashing step is performed. From the viewpoint of power consumption, it is effective to frequently perform backwashing so that the transmembrane pressure difference in the filtration process does not increase.

  As an operation control device of the membrane filtration processing device, for example, there is a description of Patent Document 1. The present invention relates to determination of a target value of a state parameter for operation control.

  Patent Document 2 describes the invention relating to the control of the flocculant injection amount of the membrane filtration apparatus and the pretreatment apparatus. In this invention, the clogging of the film can be suppressed by controlling the amount of the flocculant injected based on the chromaticity / turbidity value of the raw water.

JP-A-8-229554 JP 2002-336871 A

  In the back washing process of the conventional membrane filtration treatment, the treated water once filtered is made to flow backward and consumed. Therefore, the effective amount of water that can be actually used is a value obtained by subtracting the amount of backwash water from the amount of filtered water. Here, this is called the actual filtered water amount. In order to obtain a large amount of actual filtered water, it is better to reduce the frequency of backwashing. In terms of backwashing frequency, power consumption and actual filtered water amount are in a trade-off relationship. Now, when “power cost per unit amount of actual filtered water” is calculated as an evaluation index, there is an optimum value of backwash frequency that minimizes the value of this evaluation index. In normal water treatment, the transmembrane pressure difference varies depending on the raw water quality and temperature, so the `` power cost per unit amount of actual filtered water '' also changes, and as a result, at least the optimal value of backwash frequency varies depending on the season and date. It is done. However, generally used timer control has a disadvantage that the optimum value cannot always be realized because the filtration time and the backwash time are given as constant.

  Furthermore, it is considered that the membrane filtration processing apparatus differs in the chemical cleaning time and replacement time of the membrane module depending on the operation method. If the membrane module cleaning cost and replacement work cost are not negligible compared to the power cost, it is desirable to minimize the “cost per unit amount of actual filtered water” including those costs. The operation of the current membrane filtration apparatus has no guarantee that this "cost per unit amount of actual filtrate" can be minimized.

  The subject of the above-mentioned patent document 1 is a reverse osmosis membrane desalination plant, and is not intended for a membrane filtration device in which a filtration step and a backwashing step are frequently repeated as used in a water purification plant. Furthermore, there was no description about the backwashing process, and the purpose of optimally determining the backwashing time and filtration time was not satisfied.

  Moreover, when there exist pre-processing, there also existed a fault by which the optimal operation | movement in terms of cost is not guaranteed as the whole water purification system. For example, if the amount of flocculant injected is too small in the coagulation sedimentation process provided in the previous stage of the membrane filtration apparatus, the amount of turbidity and organic matter flowing out to the membrane filtration apparatus increases. In this case, although the coagulation sedimentation processing cost is reduced, the load on the membrane filtration processing apparatus becomes excessive, and the power cost and the frequency of backwashing increase, and the processing cost of the entire water purification system increases. Conversely, if the amount of the flocculant injected is large in the coagulation sedimentation treatment, the power cost of the membrane filtration apparatus can be reduced, but the coagulation sedimentation treatment cost becomes high and the treatment cost of the whole water purification treatment system becomes high. In some cases, residual aluminum ions may cause clogging. As described above, the pretreatment and the membrane filtration treatment are closely related, but there is no known technique as to what operation is always optimal in terms of cost.

  Moreover, in patent document 2, only the injection | pouring amount of the coagulant | flocculant which reduces clogging is shown, The optimal coagulant | flocculant injection | pouring amount seen from the surface of the process cost of the whole water purification process, and the appropriateness of a membrane filtration processing apparatus are shown. Operating conditions are not shown.

  As described above, there has been no technology for obtaining the optimum operating conditions of the “membrane filtration apparatus” and the “water purification system including the membrane filtration apparatus” from the viewpoint of treatment cost.

  In view of the above-mentioned problems of the prior art, the object of the present invention is to support the operation of a membrane filtration treatment device that optimizes the operation control of the water purification treatment system including the membrane filtration treatment device itself and the pretreatment in terms of cost. To provide an apparatus.

  To achieve the above object, the present invention provides an operation support apparatus for supporting operation control of a membrane filtration processing apparatus for filtering raw water, wherein the membrane filtration processing apparatus includes a transmembrane differential pressure and a filtration flow rate of the membrane filtration processing apparatus. Membrane filtration processing device that captures current operation information Current operation information interface, planned water amount information interface that captures pre-designed water amount information, and the rate of increase in transmembrane differential pressure from the past or the past of filtration flow rate during filtration Based on the reduction ratio and the planned water volume information, the recommended operation amount of the membrane filtration treatment device including at least the backwash time and the filtration time is calculated, and further, the membrane filtration at the recommended operation amount of the membrane filtration treatment device is calculated. Membrane filtration processing cost reduction operation amount calculation means for calculating membrane filtration processing cost information which is the operating cost of the processing device, the membrane filtration processing cost information and the membrane filtration processing device recommended operation Characterized by comprising a display device for displaying a work amount on the screen.

  Alternatively, in an operation support device that supports operation control of a membrane filtration treatment device that filters raw water, a membrane filtration treatment raw water quality information interface that captures raw water quality information flowing into a membrane filtration treatment device including turbidity or ultraviolet absorbance of raw water, and Based on the planned water volume information interface that captures the planned water volume information given in advance, the membrane parameter interface that fetches the resistance coefficient and filtration coefficient of the membrane given in advance, the turbidity or the ultraviolet absorbance, and the planned water volume information, A membrane filtration treatment device recommended operation amount including at least a backwash time and a filtration time calculated based on the cake ratio obtained as a function of the turbidity or the ultraviolet absorbance is calculated, and the membrane filtration treatment device recommended operation amount is further calculated. Membrane filtration processing to calculate membrane filtration processing cost information, which is the operating cost of membrane filtration processing equipment at the time of And reducing the driving operation amount calculating means, characterized by comprising a display device for displaying the membrane filtration treatment costs information and the membrane filtration treatment apparatus recommended driving operation amount.

  Alternatively, the above two inventions are combined, and the membrane filtration processing cost reduction operation amount calculation means calculates the membrane filtration processing device recommended operation amount and membrane filtration processing cost information including the membrane filtration processing device current operation information. It is characterized by that.

  Alternatively, the operation support device of the membrane filtration processing device of the present invention includes a membrane filtration treatment device maintenance information interface for capturing membrane filtration treatment device maintenance information including at least either a chemical cleaning cost or a membrane module replacement cost, and at least a plan. Membrane filtration processing cost reduction operation amount calculation means for calculating a membrane filtration treatment device recommended operation amount including at least filtration time and backwash time based on water amount information and membrane filtration treatment device maintenance information. And

  Alternatively, a pretreatment device having the ability to remove turbidity is provided in the previous stage of the membrane filtration treatment device, and the pretreatment device raw water quality information interface that captures inflow raw water quality information and the operation of the pretreatment device Based on the pretreatment device operating condition setting means for setting conditions, the planned water volume information, the pretreatment device inflow raw water quality information, and the pretreatment device operation condition information, the water quality at the pretreatment device outlet and the pretreatment by the pretreatment device The pretreatment device water quality / cost calculation means for providing the water quality information to the membrane filtration raw water quality information interface, and whether the calculated pretreatment cost and the membrane filtration treatment cost are optimal values. And if it is not the optimum value, at least a total processing cost judgment means for outputting a preprocessing operation condition setting change signal for changing the operation condition setting to the pretreatment device operation condition setting means; And displaying a driving operation amount information of the pretreatment apparatus when the total of the membrane filtration treatment costs and the pre-treatment costs were optimal value.

  Alternatively, a coagulation sedimentation treatment device is provided in the preceding stage of the membrane filtration treatment device, and the coagulation sedimentation treatment device raw water water quality information interface for taking in the information of the raw water water quality flowing into the coagulation sedimentation treatment device, and the coagulation sedimentation treatment Coagulation / precipitation treatment device operation condition setting means for setting the operation conditions of the device, the water quality of the coagulation / precipitation treatment device outlet based on the planned water amount information, the coagulation / precipitation treatment device inflow raw water quality information, and the coagulation / precipitation treatment device operation condition information And the processing cost by the coagulation sedimentation processing device, the water quality / cost calculation means for giving the water quality at the outlet of the coagulation sedimentation processing device to the membrane filtration raw water quality information interface, and the processing cost by the coagulation sedimentation processing device And the total membrane filtration treatment cost is determined to be an optimum value. A total processing cost judgment means for outputting a coagulation sedimentation processing operation condition setting change signal for changing the setting, and the total processing cost of the coagulation sedimentation processing device and the membrane filtration processing cost is an optimum value by the total processing cost judgment means. In this case, the operation operation amount information of the coagulation sedimentation processing device is displayed on the screen.

  ADVANTAGE OF THE INVENTION According to this invention, the driving | operation assistance apparatus which can reduce the process cost for operation control of a membrane filtration processing apparatus is realizable.

Hereinafter, a plurality of embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol has shown the equivalent thing through each figure.
(First embodiment)
FIG. 1 shows the configuration of an operation support apparatus for a membrane filtration apparatus according to a first embodiment of the present invention. The apparatus supports the operation of the membrane filtration apparatus by calculation based on the current operation information of the membrane filtration apparatus. A functional block diagram is shown.

  The membrane filtration processing device current operation information interface 12 is provided with membrane filtration processing device current operation information 11 including at least the transmembrane pressure difference and the filtrate flow rate from the membrane filtration processing device 10. As a way of giving information, an electric line may be used, or an operator may read and input the value of the instrument panel of the membrane filtration processing apparatus 10. The membrane filtration processing apparatus current operation information interface 12 is realized by a keyboard or an electronic circuit provided in a computer or a monitoring control panel. The membrane filtration processing device current operation information 11 via the membrane filtration processing device current operation information interface 12 is given to the membrane filtration processing cost reduction operation amount calculation means 15 as digitized information.

  Here, in addition to the electronic membrane filtration processing apparatus current operation information 11, past operation record information may be used at the same time. The planned water volume information 14 is given from the planned water volume information interface 13 to the membrane filtration processing cost reduction operation amount calculation means 15. Information can be given to the planned water quantity information interface 13 in either a form in which information is automatically given from a computer or a form in which a person such as an operator inputs a value. The planned water amount information 14 via the planned water amount information interface 13 becomes computerized information and is given to the membrane filtration processing cost reduction operation amount calculation means 15.

  Using the membrane filtration processing device current operation information 11 and the planned water amount information 14 given in this way, the membrane filtration processing cost reduction operation amount calculation means 15 uses the membrane filtration processing cost information 16 and the membrane filtration processing device recommended operation amount. Information 18 is calculated and displayed on the display device 17. An example of the calculation method will be described below.

A general loose filtration model for full flow filtration is given by equations (1) and (2).
dVf / dt = A ² · k · Pf / (c · μ · (Vf + V ₀ )) (1)
Vf = ∫ (dVf / dt) (2)
Here, Vf: total amount of filtrate after the start of filtration, A: membrane area, k: resistance coefficient, Pf: transmembrane pressure difference during filtration, c: cake ratio to unit filtrate amount, μ: viscosity coefficient of water, V ₀ : Filtration constant.

In the formula (1), the membrane area A is known as the specification of the membrane module, and the transmembrane pressure difference Pf at the time of filtration is given as the membrane filtration processing apparatus current operation information 11. The filtrate total amount Vf after the start of filtration is given by the integrated value of the filtration flow rate given as the membrane filtration processing apparatus current operation information 11. The viscosity coefficient μ of water is given as a physical constant, and the remaining resistance coefficient k, the cake ratio c with respect to the unit filtrate amount, and the filtration constant V ₀ are identified from the values of the membrane filtration apparatus current operation information 11. For identification, it is sufficient to know at least two different transmembrane pressure differences or changes in the filtration flow rate at two times. In water treatment plants, there are many cases where constant flow filtration is generally applied. In that case, since the filtration flow rate is controlled to be constant, the rate of increase in transmembrane pressure differential from the past is used for this identification. It will be. In general water purification plants for general industries, constant pressure filtration may also be applied. In this case, the filtration pressure is controlled to be constant. Become.

By using this model, the filtration flow rate dVf / dt per unit time with respect to the transmembrane pressure difference Pf during filtration can be calculated. The power of the pressure pump required for filtration is proportional to the product of the discharge pressure Pfp and the filtration flow rate dVf / dt. Assuming that the pressure loss during filtration other than the transmembrane pressure difference such as the piping and lifting difference is Pf ′, the electric power Wf consumed by the pressure pump for filtration is given by Equation (3).
Wf = k ₂ · Pfp · (dVf / dt) = k ₂ · (Pf + Pf ') · (dVf / dt) (3)
Where K _{2 is a} proportionality constant.

Next, with reference to equation (1), a backwash model is assumed as equations (4) and (5).
dVb / dt = A ² · k ₃ · Pb / (c · µ · (Vfsum−Vb−V ₀ )) (4)
Vb = ∫ (dVb / dt) (5)
Here, Vb: backwash water amount after the start of backwashing, k _3: backwash during resistance coefficient, Pb: transmembrane pressure during backwashing, Vfsum: a filtrate amount immediately before starting the backwash.

The electric power Wb consumed by the backwash pump at the time of backwashing is given by equation (6).
Wb = k ₄ · Pbp · (dVb / dt) = k ₄ · (Pb + Pb ') · (dVb / dt) (6)
Here, k ₄ : proportional constant, Pbp: discharge pressure of backwash pump, Pb ′: pressure loss during backwash other than transmembrane pressure difference such as piping and lift difference.

  When the filtration time is tf and the backwash time is tb, the actual filtration flow rate in one cycle composed of the filtration step and the backwash step is expressed by Equation (7).

The amount of power consumed to obtain the flow rate of Equation (7) is Equation (8).

  Therefore, the amount of electric power U necessary for making a unit amount of membrane filtrate is expressed by the equation (9).

In order to convert this electric energy U into cost, the electric energy unit price is multiplied. If you have an electricity contract with a power company by season that has different unit prices for electricity during the day and at night, the power required to obtain the unit amount of membrane filtration water, taking into account differences in time and season The quantity charge Co is obtained by the equation (10).
Co = U · g (t) (10)
Here, g (t) is a unit price of electric energy charge.

  From the economical aspect, it is desirable that the value of the electricity charge Co is small. As can be seen from equation (9), the value of the electric energy charge Co varies depending on the filtration time tf, the backwash time tb, the discharge pressure Pfp of the filtration pump, and the discharge pressure Pbp of the backwash pump. Among these items, the filtration time tf and the backwash time tb are items that are easy to change as the operation amount because there are few restrictions due to device specifications and the like. In view of this, the membrane filtration processing cost reduction operation amount calculation means 15 is provided with an optimum solution search algorithm that optimizes at least the filtration time tf and the backwash time tb using the electric energy charge Co as an evaluation index.

  As the search algorithm, mathematical means such as brute force method, genetic algorithm, non-linear programming method, steepest gradient method, or the like may be used, or a means for selecting an optimal one from a plurality of preset operation patterns. However, it is a precondition that the actual filtered water amount represented by the equation (7) satisfies the planned water amount information 14. The operation amount obtained so as to minimize the value of the electric energy charge Co is the recommended operation amount of the membrane filtration processing apparatus described in the present invention, and the electric energy charge Co at that time corresponds to the membrane filtration processing cost information.

  In the above embodiment, an example of optimizing at least the filtration time tf and the backwash time tb based on the loose filtration model is shown, but the scope of the present invention is not limited to this algorithm. Even using an algorithm that optimizes the filtration time tf and backwash time tb based on the same index, that is, the cost for obtaining the unit amount of membrane filtration water, using past operation data. good.

  Membrane filtration processing device recommended operation amount information 18 obtained by the above procedure is displayed on the display device 17. The operator looks at it and adjusts the set values of the filtration time and / or backwash time among the operating conditions of the membrane filtration apparatus 10.

  Membrane filtration processing device recommended operation amount information 18 includes at least information for minimizing the cost for obtaining a unit amount of membrane filtration water, but can be a screen that can compare other candidates and current operation amounts. Better. Further, membrane filtration processing cost information 16 is also displayed on the screen. This information includes at least the amount of electricity required to make a unit amount of membrane filtered water, or the cost required for membrane filtration of the planned amount of water.

  In the above embodiment, only the operation support by displaying the calculation result is described. However, the membrane filtration apparatus 10 is automatically operated based on the appropriate values of the filtration time tf and the backwash time tb obtained by the above calculation. May be.

  FIG. 2 shows a screen example of the display device. The display device 17 shows the current state and recommended values of the filtration flow rate, the filtration time, the backwash time, and the processing cost as an example of the operation amount. Specific means for realizing the display device may be any of a PC, an instrument panel, a graphic panel, a portable information terminal, and a mobile phone.

With the above configuration, in the first embodiment, based on the current operation information of the membrane filtration treatment device 10, the recommendation of the membrane filtration treatment device 10 that can minimize the power cost required to produce the filtered water unit amount is recommended. The operating conditions can be calculated and presented to the operator.
(Second Embodiment)
FIG. 3 is a functional block diagram of an apparatus that appropriately performs operation support by performing calculation based on raw water quality information in the configuration of the operation support apparatus of the membrane filtration apparatus according to the second embodiment of the present invention.

  Unlike the first embodiment, one of the input information of the membrane filtration processing cost reduction operation amount calculation means 15 is not the membrane filtration processing apparatus current operation information 11 but the membrane filtration raw water quality information interface 21. This is the membrane filtration raw water quality information 20. Other points, the planned water amount information interface 13, the membrane filtration processing cost reduction operation amount calculation means 15, the display device 17, and the input / output information are the same as those in the first embodiment and have the same functions.

In the first embodiment, the parameters of the loose filtration model are identified using the membrane filtration processing apparatus current operation information 11, but in the second embodiment, the parameters of the loose filtration model shown in Expression (1) are used. Among these, “the volume c of cake obtained per unit filtrate amount” is determined based on the raw water quality information. This value is related to the turbidity of raw water, organic matter, and soluble Mn concentration. The simplest derivation formula for c is expressed by formula (11), for example, where the turbidity of the raw water is Tu ₀ .
c = k ₅ · Tu ₀ (11)
Or, when the turbidity of membrane filtrate is Tuf, it is expressed by equation (12), which is more accurate.
c = k ₅・ (Tu ₀ −Tuf) (12)
It is also possible to estimate the value of c in the same manner using the correlation with the organic matter concentration index and the soluble Mn concentration measured by the ultraviolet absorbance E260. Other water quality and temperature, there is a value of c differs depending like pH, in which case it is possible to cope with the identification of the coefficients k _5. Since the resistance coefficient k and the filtration constant V ₀ which are other parameters in the equation (1) do not theoretically depend on the raw water quality, they can be determined at the start of the operation of the membrane filtration apparatus 10 or when the membrane module is replaced. it can. These values are given from the membrane parameter interface 23 to the membrane filtration processing cost reduction operation amount calculation means 15.

  Therefore, all the constants and coefficients on the right side of Equation (1) are given, and the value of dVf / dt can be calculated as a function of the transmembrane pressure difference Pf at the time of filtration and the filtrate total amount Vf after the start of filtration. Similarly, equations (2) to (10) can be calculated.

  From the economical aspect, it is desirable that the value of the electricity charge Co is small. As can be seen from equation (9), the value of the electric energy charge Co varies depending on the filtration time tf, the backwash time tb, the discharge pressure Pfp of the filtration pump, and the discharge pressure Pbp of the backwash pump. Among these items, the filtration time tf and the backwash time tb are items that are easy to change as the operation amount because there are few restrictions due to device specifications and the like. In view of this, the membrane filtration processing cost reduction operation amount calculation means 15 is provided with an optimum solution search algorithm that optimizes at least the filtration time tf and the backwash time tb using the electric energy charge Co as an evaluation index.

  As the search algorithm, mathematical means such as brute force method, genetic algorithm, non-linear programming method, steepest gradient method, or the like may be used, or a means for selecting an optimal one from a plurality of preset operation patterns. However, it is a precondition that the actual filtered water amount represented by the equation (7) satisfies the planned water amount information 14. The operation amount obtained so as to minimize the value of the electric energy charge Co is the recommended operation amount of the membrane filtration processing apparatus described in the present invention, and the electric energy charge Co at that time corresponds to the membrane filtration processing cost information.

  In the above embodiment, an example of optimizing the filtration time tf and the backwash time tb based on the loose filtration model is shown, but the scope of the present invention is not limited to this algorithm. Even using an algorithm that optimizes the filtration time tf and backwash time tb based on the same index, that is, the cost for obtaining the unit amount of membrane filtration water, using past operation data. good.

  Membrane filtration processing device recommended operation amount information 18 obtained by the above procedure is displayed on the display device 17. The operator looks at it and adjusts the set values of the filtration time and / or backwash time among the operating conditions of the membrane filtration apparatus 10.

  Membrane filtration processing device recommended operation amount information 18 includes at least information for minimizing the cost for obtaining a unit amount of membrane filtration water, but can be a screen that can compare other candidates and current operation amounts. Better. Further, membrane filtration processing cost information 16 is also displayed on the screen. This information includes at least the amount of electricity required to make a unit amount of membrane filtered water, or the cost required for membrane filtration of the planned amount of water.

  As in the first embodiment, the membrane filtration apparatus 10 may be automatically operated based on appropriate values of the filtration time tf and the backwash time tb obtained by the above calculation.

With the above configuration, in the second embodiment, based on the water quality information of the raw water, the recommended operating conditions of the membrane filtration apparatus 10 that can minimize the power cost required for producing the filtered water unit amount are made to the operator. It can be presented.
(Third embodiment)
FIG. 4 is a functional block diagram of the operation support apparatus based on the current operation information and the raw water quality information of the membrane filtration apparatus in the configuration of the operation support apparatus of the membrane filtration apparatus according to the third embodiment of the present invention.

In this embodiment, the membrane filtration processing apparatus current operation information 11 described in the first embodiment and the membrane filtration raw water quality information 20 described in the second embodiment are used in combination, and “resistance coefficient k” “ The filtration constant V ₀ "" the cake volume c obtained per unit filtrate volume "is identified. By increasing the information used for identification, the parameter estimation accuracy can be improved.

  For example, “unit filtrate obtained from a function of turbidity or ultraviolet absorbance” obtained from “the volume c of cake obtained per unit filtrate amount” obtained from the transmembrane pressure difference and filtration flow rate at two different times. There is a method of using an average value or a prorated value of the value of the cake volume c obtained with respect to the quantity.

Alternatively, the value of “cake volume c obtained per unit filtrate volume” obtained from turbidity or ultraviolet absorbance is fixed, and the resistance coefficient k is calculated from the transmembrane pressure difference and filtration flow rate at two different times. ”And“ filtration constant V ₀ ”are determined. This makes it possible to obtain highly accurate identification values of “resistance coefficient k” and “filtration constant V ₀ ”.

  Using these values, equations (1) to (10) are calculated. By using the optimum solution search algorithm provided in the membrane filtration processing cost reduction operation amount calculation means 15, the filtration time tf and the backwash time tb that minimize the value of the electric energy charge Co can be calculated. However, it is a precondition that the actual filtered water amount represented by the equation (7) satisfies the planned water amount information 14. The operation amount obtained so as to minimize the value of the electric energy charge Co corresponds to the recommended operation amount of the membrane filtration apparatus described in the present invention.

With the above configuration, the third embodiment can output the membrane filtration processing device recommended operation amount information 18 and the membrane filtration processing cost information 16 that simulate the reality more accurately.
(Fourth embodiment)
FIG. 5 shows the functional block diagram of the operation support apparatus based on the current operation information, raw water quality information, and maintenance information in the configuration of the operation support apparatus of the membrane filtration apparatus according to the fourth embodiment of the present invention.

  In addition to the power cost, the cost for the membrane filtration treatment includes chemical cleaning cost generated by chemical cleaning of the membrane. Furthermore, the membrane module needs to be replaced in the long term, but the replacement also costs money. In the fourth embodiment, in consideration of the membrane filtration processing device maintenance information 41 including the chemical cleaning cost and the membrane module replacement cost, the operation operation amount with the lowest cost is presented to the operator.

The membrane filtration processing device maintenance information 41 may be automatically given from a database or the like via a line, or may be inputted by an operator through the membrane filtration processing device maintenance information interface 40. An example of the membrane filtration processing apparatus maintenance information 41 assumed here is shown below.
・ Chemical cleaning frequency: Once every x months ・ Chemical cleaning cost: xxx 10,000 yen / time ・ Membrane module replacement time: After x years ・ Membrane module replacement cost: xxx 10,000 yen / time To obtain unit amount of membrane filtration water In addition to the electric power charge Co required for the operation, the operation and maintenance cost Co_total considering the chemical cleaning cost and the membrane module replacement cost is expressed by Expression (13).
Co_total = Co + Co_chem · (tf + tb) / Tchem + Co_chg · (tf + tb) / Tchg (13)
Here, Co_chem: chemical cleaning cost, Tchem: chemical cleaning interval, Co_chg: membrane module replacement cost, Tchg: membrane module replacement interval.

  When the chemical cleaning interval and the membrane module replacement interval are constant, the operation maintenance cost Co_total represented by the equation (13) may be output to the display device 17 as the membrane filtration processing cost information 16.

  The value of the operation and maintenance cost Co_total varies depending on the filtration time tf and the backwash time tb. From the economical aspect, it is desirable that the value of the operation and maintenance cost Co_total is small.

  Therefore, the membrane filtration processing cost reduction operation amount calculation means 15 is provided with an optimal solution search algorithm for the filtration time tf and the backwash time tb using the operation and maintenance cost Co_total as an evaluation index. As the search algorithm, mathematical means such as brute force method, genetic algorithm, non-linear programming method, steepest gradient method, or the like may be used, or a means for selecting an optimal one from a plurality of preset operation patterns. However, it is a precondition that the actual filtered water amount represented by the equation (7) satisfies the planned water amount information 14. The recommended operation amount of the membrane filtration apparatus described in the present invention corresponds to the operation amount obtained so as to minimize the value of the operation and maintenance management cost Co_total.

With the above configuration, in the fourth embodiment, it is possible to present to the operator information on membrane filtration processing costs considering membrane module replacement costs and chemical cleaning costs in addition to power costs.
(Fifth embodiment)
FIG. 6 shows the configuration of the operation support device of the membrane filtration apparatus according to the fifth embodiment of the present invention, and supports the operation of the membrane filtration apparatus by calculation based on the current operation information, raw water quality information and maintenance information. The functional block diagram of the apparatus which displays chemical cleaning time is shown.

  In the fifth embodiment, when the chemical cleaning interval is not fixed, a continuous function modeling the temporal change of the transmembrane pressure difference immediately after the backwashing process is completed by the chemical cleaning time prediction unit 50 is used. Predicting and outputting the chemical cleaning predicted time of the membrane in the membrane filtration processing apparatus. Furthermore, it is characterized in that the amount of operation of the membrane filtration device is optimized including the chemical cleaning cost.

An example of the assumed membrane filtration processing apparatus maintenance information 41 is shown below.
・ Chemical cleaning time: When the transmembrane pressure difference immediately after the backwash process exceeds the specified value ・ Chemical purchase + waste liquid treatment cost: xxx 10,000 yen / time Chemical cleaning based on the transmembrane differential pressure immediately after backwashing In the case of carrying out, it is possible to reduce the frequency of chemical cleaning by carrying out filtration and back-washing operation so that the transmembrane pressure difference immediately after back-washing is not increased as much as possible, and it is possible to suppress the cost of chemical cleaning.

  An operation in which the transmembrane pressure difference immediately after backwashing does not increase as much as possible can be realized by constructing a “transmembrane pressure differential prediction model immediately after backwashing” and following the prediction calculation using that model. An example of this “transmembrane differential pressure prediction model immediately after backwashing” will be described below.

  FIG. 7 is an explanatory diagram of a filtration flow rate model immediately after backwashing. FIG. 7 (i) schematically shows the change in the transmembrane pressure difference of the membrane filtration processing apparatus performing quantitative filtration. In the filtration process, the transmembrane pressure difference increases as the filtration time elapses. However, when the backwash process is performed, the cake adhering to the membrane surface is removed, and therefore, the transmembrane pressure pressure temporarily decreases. The transmembrane pressure difference immediately after this backwashing becomes the initial value of the next filtration step, and the transmembrane pressure difference increases again as the filtration time elapses.

  However, even if backwashing is performed, deposits gradually accumulate on the membrane surface or pores. Due to this influence, the transmembrane pressure difference immediately after backwashing gradually increases, although there are actually variations. In general, chemical cleaning is performed when the transmembrane pressure difference immediately after backwashing exceeds a set value. However, there is no guarantee that the set value is always the optimum value in view of the overall cost.

  The transmembrane pressure difference immediately after backwashing takes a discrete value as shown in FIG. 7 (ii). If there is a continuous function that can simulate this discrete value as a mathematical expression, the future "transmembrane pressure difference immediately after backwashing" can be predicted, so the filtration time that can anticipate the future in advance and minimize the overall cost The backwash time can be calculated. At the same time, it is possible to output the predicted time for chemical cleaning.

FIG. 7 (iii) shows a schematic diagram of a continuous function for predicting this “transmembrane pressure difference immediately after backwashing”. The phenomenon in which accumulated substances that cannot be removed by the backwashing process gradually accumulate on the membrane surface is similar to the mechanism by which cake accumulates on the membrane surface during the filtration process. Therefore, for example, a model that assumes an equation of the same type as the loose filtration model shown in Equation (1) is constructed as follows.
dVfb / dt = A ² · k ₇ · Pfb / (c '· µ · (Vfsum + V ₀ )) (14)
Vfsum = ∫ (dVf / dt) (15)
Here, Vfb: filtration flow rate immediately after backwashing, A: membrane area, k ₇ : resistance coefficient, Pfb: transmembrane pressure difference immediately after backwashing, c ′: ratio of strong adhesive cake to unit filtrate volume, μ: Viscosity coefficient of water, Vfsum: total amount of filtrate after chemical washing last time, V ₀ : filtration constant.

“Resistivity coefficient k ₇ ”, “filtration constant V ₀ ”, and “strongly adherent cake ratio c ′ to unit filtrate amount” in this equation are obtained by using membrane filtration apparatus current operation information 11 and / or membrane filtration raw water quality information 20. Can be identified. As a result, Equation (14) is a function indicating the relationship between the filtration flow rate immediately after backwashing, the transmembrane pressure difference, and the total filtrate amount. Accordingly, the “transmembrane differential pressure immediately after backwashing” can be predicted and the time Tchem until the transmembrane differential pressure immediately after backwashing reaches a predetermined value can also be obtained.

  The above calculation algorithm is provided in the chemical cleaning time prediction means 50 and the membrane filtration processing cost reduction operation amount calculation means 15. The obtained chemical cleaning predicted time information 51 is presented to the operator via the display device 17.

Since the value of the transmembrane pressure difference immediately after backwashing changes due to the presence of a strong adhesive cake that cannot be removed by the backwashing process, the “filtration resistance coefficient k” or “ The value of the “filtration constant V ₀ ” also changes each time. Based on the predicted value of “transmembrane differential pressure immediately after backwashing” calculated by equation (14), “filtration resistance coefficient k” or “filtration constant V ₀ ” can be estimated.

For example, assume that the predicted value of “transmembrane pressure difference immediately after backwashing” is 1.01 times the previous value. For the sake of simplicity, if this is all passed on to the “filtration resistance coefficient k” in equation (1), it can be considered that the value of k has increased 1.01 times the previous time. This ratio is the same in the backwashing process, and it can be considered that the value of “resistance coefficient k ₃ during backwashing” in the equation (4) describing the backwashing process is 1.01 times. By calculating using the value of this coefficient, it is possible to calculate the electricity charge Co required to obtain the unit amount of membrane filtrate. In addition to this, the operation and maintenance cost Co_pow_chem considering the chemical cleaning cost is expressed by Expression (16).
Co_pow_chem = Co + Co_chem · (tf + tb) / Tchem (16)
The value of the operation and maintenance cost Co_pow_chem varies depending on the filtration time tf and the backwash time tb. It is desirable that this value is small from the economical aspect.

  Therefore, an optimum solution search algorithm for the filtration time tf and the backwash time tb is provided in the membrane filtration processing cost reduction operation amount calculation means 15. As the search algorithm, mathematical means such as brute force method, genetic algorithm, nonlinear programming method, steepest gradient method, or the like may be used, or a method for selecting an optimum one from a plurality of preset operation patterns. However, it is a precondition that the actual filtered water amount represented by Expression (7) satisfies the planned water amount information 14.

With the above configuration, in the fifth embodiment, it is possible to present to the operator the optimal operating conditions that comprehensively consider the chemical cleaning cost and the power cost, and the predicted timing of chemical cleaning.
(Sixth embodiment)
FIG. 8 shows the configuration of the operation support device for the membrane filtration apparatus according to the sixth embodiment of the present invention. The operation of the membrane filtration apparatus is supported by calculation based on the current operation information, raw water quality information and maintenance information. The functional block diagram of the apparatus which displays chemical cleaning time and membrane replacement time is shown.

In the sixth embodiment, when the membrane module replacement interval is not fixed in the membrane filtration apparatus, the membrane replacement time predicting means 60 predicts and displays the next replacement time, and the membrane module replacement. It is characterized by optimizing the amount of operation of the membrane filtration device including the cost. An example of the assumed membrane filtration processing apparatus maintenance information 41 is shown below.
・ Membrane module replacement period: When the transmembrane pressure difference immediately after chemical cleaning exceeds the specified value ・ Membrane module replacement cost: xxx million yen / time Replace the membrane module based on the transmembrane differential pressure immediately after chemical cleaning In such a case, the membrane module replacement frequency can be reduced and the membrane module replacement cost can be suppressed by performing the filtration / backwash operation so that the transmembrane pressure difference immediately after the chemical cleaning does not increase as much as possible.

  An operation in which the transmembrane pressure difference immediately after chemical cleaning does not increase as much as possible can be realized by constructing a “transmembrane differential pressure prediction model immediately after chemical cleaning” and following prediction calculation using the model. An example of this “transmembrane pressure difference prediction model immediately after chemical cleaning” will be described below.

  FIG. 9 is an explanatory diagram of a filtration flow rate model immediately after chemical cleaning. FIG. 9 (i) schematically shows a temporal change in the transmembrane pressure difference after chemical cleaning. When the membrane filtration treatment device is operated by repeating the filtration step and backwashing step, the transmembrane pressure difference increases with the operating time, but the cake adhering to the membrane surface is removed after the chemical washing step. The transmembrane pressure decreases once. The transmembrane pressure difference immediately after this chemical cleaning becomes the initial value of the next filtration step, and the transmembrane pressure pressure increases as the filtration time elapses again.

  However, even if chemical cleaning is performed, deposits gradually accumulate on the membrane surface or pores. Due to this influence, there is a variation in reality, but the transmembrane pressure difference immediately after chemical cleaning gradually increases. Generally, when the transmembrane pressure difference immediately after the chemical cleaning exceeds a set value, the membrane is replaced. However, there is no guarantee that the set value is always an optimum value in view of the overall cost.

  The transmembrane pressure difference immediately after the chemical cleaning becomes a discrete value as shown in FIG. 9 (i). If there is a continuous function that can simulate this discrete value as a mathematical expression, it is possible to predict the future "transmembrane differential pressure immediately after chemical cleaning", so that the filtration time that can minimize the overall cost in anticipation of the future, The backwash time can be determined by calculation. At the same time, it is possible to output the predicted time for membrane module replacement.

FIG. 9 (ii) shows a schematic diagram of a continuous function for predicting the “transmembrane differential pressure immediately after chemical cleaning”. The phenomenon that accumulations that cannot be removed by the chemical cleaning process gradually accumulate on the membrane surface is similar to the mechanism by which cake accumulates on the membrane surface during the filtration process. Therefore, for example, a model is constructed assuming an equation of the same type as the loose filtration model expressed by the equation (1).
dVf_chem / dt = A ² · k ₈ · Pf_chem / (c '' · μ · (Vf_total + V ₀ )) (17)
Vf_total = ∫ (dVf / dt) (18)
Where Vf_chem: filtration flow rate immediately after chemical cleaning, A: membrane area, k ₈ : resistance coefficient, Pf_chem: transmembrane differential pressure immediately after chemical cleaning, c '': chemical resistance cake ratio to unit filtrate volume, μ : Viscosity coefficient of water, Vf_total: Total amount of filtrate after start of use of membrane module, V ₀ : Filtration constant.

The “resistance coefficient k ₈ ”, “filtration constant V ₀ ”, and “chemical resistance cake ratio c ″ to the unit filtrate amount” in this equation are the membrane filtration apparatus current operation information 11 and / or the membrane filtration raw water quality information 20. Can be identified. The prediction calculation of “transmembrane differential pressure immediately after chemical cleaning” can be realized, and the time Tchg until the transmembrane differential pressure immediately after chemical cleaning reaches a predetermined value can also be obtained.

  The above calculation algorithm is provided in the membrane exchange time prediction means 60 and the membrane filtration processing cost reduction operation amount calculation means 15. The obtained membrane exchange prediction time information 61 is presented to the operator via the display device 17.

Since the value of the transmembrane differential pressure immediately after chemical cleaning changes due to the presence of a chemical-resistant cake that cannot be removed by chemical cleaning, the “resistance coefficient k ₇ of equation (14) describing the transmembrane differential pressure immediately after backwashing. "Or" the filtration constant V ₀ "also changes each time.

Based on the predicted value of “transmembrane pressure difference immediately after chemical cleaning” calculated by Expression (17), the value of “resistance coefficient k ₇ ” of Expression (14) can be estimated.

For example, assume that the predicted value of “transmembrane differential pressure immediately after chemical cleaning” is 1.01 times the previous value. If this is all passed to “resistance coefficient k ₇ ” in equation (14) for simplicity, the value of k ₇ can be regarded as 1.01 times the previous value. By calculating using the value of this coefficient, it is possible to calculate the electricity charge Co required to obtain the unit amount of membrane filtrate. In addition to this, the operation and maintenance cost Co_total in consideration of the chemical cleaning cost and the membrane module replacement cost is expressed by Expression (19).
Co_total = Co + Co_chem · (tf + tb) / Tchem + Co_chg · (tf + tb) / Tchg (19)
Here, Co_chem: chemical cleaning cost, Tchem: chemical cleaning frequency, Co_chg: membrane module replacement cost, Tchg: membrane module replacement frequency.

  The value of the operation and maintenance cost Co_total varies depending on the set values of the filtration time tf and the backwash time tb, and is desirably small in terms of economy. Therefore, an optimum solution search algorithm for the filtration time tf and the backwash time tb is provided in the membrane filtration processing cost reduction operation amount calculation means 15. As the search algorithm, mathematical means such as brute force method, genetic algorithm, nonlinear programming method, steepest gradient method, or the like may be used, or a method for selecting an optimum one from a plurality of preset operation patterns. However, it is a precondition that the actual filtered water amount represented by Expression (7) satisfies the planned water amount information 14.

With the above configuration, in the sixth embodiment, it is possible to present to the operator the optimum operating conditions and the expected replacement time of the membrane module that comprehensively considers the membrane module replacement cost, chemical cleaning cost, and power cost. It becomes.
(Seventh embodiment)
FIG. 10 shows the configuration of the operation support apparatus of the membrane filtration processing apparatus according to the seventh embodiment of the present invention. By the calculation based on the current operation information and the pretreatment apparatus raw water quality information, the membrane filtration treatment apparatus and the previous stage The functional block diagram of the apparatus which supports the driving | operation of a processing apparatus is shown.

  The membrane filtration apparatus 10 may be used alone, but in the case of a water purification plant that draws raw water from surface water such as rivers, coagulation treatment, coagulation precipitation treatment, coagulation precipitation filtration treatment, high-speed fiber filtration treatment, etc. Often used in combination with a pretreatment device 81 having the ability to remove turbidity.

  The turbidity can be removed by either the pretreatment device 81 or the membrane filtration treatment device 10, so that the pretreatment device 81 can be sufficiently removed to reduce the water quality load on the membrane filtration treatment device 10, or the treatment can be reduced by the pretreatment device 81. In addition, there may be options for operation methods such as a method of applying a load to the membrane processing apparatus 10. In the seventh embodiment, load distribution between the pretreatment device 81 and the membrane filtration treatment device 10 is optimized so that the total processing cost of the entire plant is minimized.

  The quality information of the raw water flowing into the pretreatment device 81 is given to the pretreatment device water quality / cost calculation means 76 as the digitized pretreatment device raw water quality information 71 via the pretreatment device raw water quality information interface 70. Specific examples of raw water quality information include turbidity, water temperature, and dissolved organic matter concentration. There are two ways to give the water quality information to the raw water quality information interface 70 of the pretreatment device: a case where a person such as an operator inputs the information, and a case where information on the automatic measuring device is given electronically.

  The pretreatment apparatus water quality / cost calculation means 76 is provided with the planned water quantity information 14 from the planned water quantity information interface 13. Further, the pretreatment device water quality / cost calculation means 76 is provided with pretreatment device operation condition information 73 from the pretreatment device operation condition setting means 72. The pretreatment device water quality / cost calculation means 76 outputs pretreatment device outlet water quality information 74 and pretreatment cost information 75 based on the pretreatment device raw water quality information 71, the planned water volume information 14, and the pretreatment device operating condition information 73. The

  The contents of the pretreatment device water quality / cost calculation means 76 may be an algorithm for calculation based on a previously stored table, or may be a calculation algorithm by a simulator modeling a physicochemical phenomenon. The pretreatment device outlet water quality information 74 is the same as the raw water quality information of the membrane filtration treatment device 10 and is given to the membrane filtration treated water raw water quality information interface 21.

  On the other hand, the preprocessing cost information 75 is given to the total processing cost determining means 77. In addition to this, the total processing cost judgment means 77 given the membrane filtration processing cost information 16 judges whether the sum of the preprocessing cost information 75 and the membrane filtration processing cost information 16 is the minimum cost. Then, pre-processing device recommended driving operation amount information 79 having a content for changing at least the operating condition of the pre-processing device 81 is calculated and output so that the sum becomes smaller. Preferably, the membrane filtration processing device recommended operation amount information 82 for changing the operation conditions of the membrane filtration processing device 10 is calculated and output. The display device 17 displays pretreatment device recommended operation amount information 79 and membrane filtration processing device recommended operation amount information 82.

With the above configuration, in the seventh embodiment, the pretreatment device 81 and the membrane filtration treatment device 10 are operated so that the pretreatment and the membrane filtration treatment can be comprehensively grasped and the treatment cost of the entire water purification treatment system can be minimized. It is possible to obtain conditions.
(Eighth embodiment)
FIG. 11 shows the configuration of the operation support apparatus of the membrane filtration apparatus according to the eighth embodiment of the present invention. The calculation based on the current operation information and the raw water quality information of the coagulation sedimentation apparatus, and the aggregation of the membrane filtration apparatus and the preceding stage. The functional block diagram of the apparatus which supports the driving | operation of a precipitation processing apparatus is shown.

  Although the membrane filtration processing apparatus 10 may be used independently, in the case of the water purification plant which takes raw water from surface waters, such as a river, it may be used in combination with the existing coagulation sedimentation processing apparatus. In the eighth embodiment, the load distribution between the coagulation sedimentation process and the membrane filtration process is optimized so that the total processing cost is minimized.

  The water quality information of the raw water flowing into the coagulation sedimentation treatment apparatus 101 is converted into an electronic coagulation sedimentation treatment apparatus raw water quality information 91 via the coagulation sedimentation treatment apparatus raw water quality information interface 90. Given to. Specific examples of raw water quality information include turbidity, water temperature, and dissolved organic matter concentration. There are two ways of giving water quality information to the coagulation sedimentation processing apparatus raw water quality information interface 90: input by a person such as an operator or information on automatic measuring equipment.

  The planned water amount information 14 is given from the planned water amount information interface 13 to the coagulation sedimentation treatment device water quality / cost calculation means 96. Further, the coagulation / sedimentation processing unit water quality / cost calculation unit 96 is provided with the coagulation / sedimentation processing unit operating condition information 93 from the coagulation / sedimentation processing unit operating condition setting unit 92. In the coagulation / sedimentation processing unit water quality / cost calculation means 96, the coagulation / sedimentation processing unit outlet water quality information 94 and the coagulation / sedimentation processing cost based on the coagulation / sedimentation processing unit raw water quality information 91, the planned water amount information 14 and the coagulation / sedimentation processing unit operating condition information 93. Information 95 is output. The contents of the coagulation sedimentation treatment device water quality / cost calculation means 96 may be an algorithm for calculation based on a previously stored table, or a calculation algorithm by a simulator modeling a physicochemical phenomenon. The coagulation sedimentation treatment apparatus outlet water quality information 94 is the same as the raw water quality information of the membrane filtration treatment apparatus 10 and is given to the membrane filtration treated water raw water quality information interface 21.

  On the other hand, the coagulation sedimentation processing cost information 95 is given to the total processing cost judgment means 77. In addition to this, the total processing cost judgment means 77 given the membrane filtration processing cost information 16 judges whether the sum of the coagulation sedimentation processing cost information 95 and the membrane filtration processing cost information 16 is the minimum cost. Then, the coagulation sedimentation processing device recommended operation amount information 99 that changes the operation conditions of at least the coagulation sedimentation processing device 101 is calculated and output so that the sum becomes smaller. Preferably, the membrane filtration processing device recommended operation amount information 81 having contents for changing the operation conditions of the membrane filtration processing device 10 is calculated and output. The display device 17 displays coagulation sedimentation processing device recommended operation amount information 99 and membrane filtration processing device recommended operation amount information 81.

  With the above configuration, in the eighth embodiment, the coagulation sedimentation treatment device 101 and the membrane filtration treatment device 10 are capable of comprehensively grasping the coagulation sedimentation treatment and the membrane filtration treatment and minimizing the treatment cost of the entire water purification treatment system. It is possible to determine the operating conditions.

The functional block diagram of the driving assistance apparatus of the membrane filtration processing apparatus based on the present driving | operation information in the 1st Embodiment of this invention. Explanatory drawing which shows the example of a screen output of the driving assistance apparatus of a membrane filtration processing apparatus. The functional block diagram of the driving assistance apparatus of the membrane filtration processing apparatus based on raw | natural water quality information in 2nd Embodiment. The functional block diagram of the driving | operation assistance apparatus of the membrane filtration processing apparatus based on the present driving | operation information and raw | natural water quality information in 3rd Embodiment. In 4th Embodiment, the functional block diagram of the driving assistance apparatus of the membrane filtration processing apparatus based on present driving | operation information, raw | natural water quality information, and maintenance information. In 5th Embodiment, the functional block diagram of the driving | operation assistance apparatus of the membrane filtration processing apparatus which shows the calculation based on the present driving | operation information, raw | natural water quality information, and maintenance information, and chemical | medical agent washing | cleaning time. Explanatory drawing of the filtration flow rate model immediately after backwashing. In 6th Embodiment, the functional block diagram of the driving | operation assistance apparatus of the membrane filtration processing apparatus which shows the calculation based on the present driving | operation information, raw | natural water quality information, and maintenance information, and chemical cleaning time and membrane replacement time. Illustration of filtration flow model immediately after chemical cleaning In 7th Embodiment, the functional block diagram of the driving | operation assistance apparatus of a membrane filtration processing apparatus and a pre-processing apparatus by the calculation based on the present driving | operation information and pre-processing apparatus raw | natural water water quality information. In 8th Embodiment, the functional block diagram of the operation support apparatus of a membrane filtration processing apparatus and a coagulation sedimentation processing apparatus by the calculation based on the present driving | operation information and the raw | natural water quality information of a coagulation sedimentation processing apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Membrane filtration processing device, 11 ... Membrane filtration processing device present operation information, 12 ... Membrane filtration processing device present operation information interface, 13 ... Planned water amount information interface, 14 ... Planned water amount information, 15 ... Membrane filtration processing cost reduction Operation operation amount calculation means, 16 ... Membrane filtration treatment cost information, 17 ... Display device, 18 ... Membrane filtration treatment device recommended operation operation amount information, 20 ... Membrane filtration raw water quality information, 21 ... Membrane filtration raw water quality information interface , 22 ... Membrane parameter interface, 23 ... Resistance coefficient and filtration constant, 40 ... Membrane filtration processing device maintenance information interface, 41 ... Membrane filtration processing device maintenance information, 50 ... Chemical cleaning time prediction means, 51 ... Chemical cleaning prediction time Information, 60 ... Membrane exchange time prediction means, 61 ... Membrane exchange prediction time information, 70 ... Pretreatment apparatus raw water quality information interface, 71 ... Pretreatment Equipment raw water quality information, 72 ... Pretreatment apparatus operating condition setting means, 73 ... Pretreatment apparatus operating condition information, 74 ... Pretreatment apparatus outlet water quality information, 75 ... Pretreatment cost information, 76 ... Pretreatment apparatus water quality / cost calculation means 77 ... Comprehensive treatment cost determination means, 79 ... Pretreatment device recommended operation amount information, 81 ... Pretreatment device, 82 ... Membrane filtration treatment device recommended operation amount information, 90 ... Coagulation sedimentation treatment device raw water quality information interface, 91: Coagulation sedimentation processing device raw water quality information, 92: Coagulation sedimentation device operating condition setting means, 93 ... Coagulation sedimentation processing device operating condition information, 94: Coagulation sedimentation processing device outlet water quality information, 95 ... Coagulation sedimentation processing cost information, 96 ... coagulation sedimentation treatment device water quality / cost calculation means, 99 ... coagulation sedimentation treatment device recommended operation amount information, 101 ... coagulation sedimentation treatment equipment.

Claims (8)

In the operation support device that supports the operation control of the membrane filtration processing device that filters raw water,
Membrane filtration processing device current operation information interface for capturing membrane filtration processing device current operation information including the transmembrane differential pressure and filtration flow rate of the membrane filtration processing device,
Planned water volume information interface for fetching the planned water volume information given in advance;
Based on the rate of increase in the transmembrane pressure difference during filtration or the rate of decrease in the filtration flow rate from the past and the planned water volume information , at least the backwash time and the filtration time should be changed in order to optimize the operation volume. the membrane filtration treatment apparatus recommended driving operation amount including calculated, pre Kimaku filtering processor recommended driving operation amount membrane filtration treatment costs reduction operation to calculate the membrane filtration treatment costs information is an operating cost of the membrane filtration treatment apparatus when the An operation amount calculating means;
An operation support apparatus for a membrane filtration processing apparatus, comprising: a display device that displays the membrane filtration treatment cost information and the recommended operation amount of the membrane filtration treatment apparatus on a screen. In the operation support device that supports the operation control of the membrane filtration processing device that filters raw water,
Membrane filtration raw water quality information interface that captures raw water quality information inflow of membrane filtration treatment equipment including turbidity or UV absorbance of raw water,
Planned water volume information interface for fetching the planned water volume information given in advance;
A membrane parameter interface that captures pre-given membrane resistance and filtration factors;
Said turbidity or the ultraviolet absorbance, the a plan water information, based on the cake ratio determined by a function of the turbidity or the ultraviolet absorbance, the membrane filtration treatment apparatus recommended driving operation quantity including at least a filtration time and the backwash time calculated, before Kimaku filtration apparatus recommended driving operation amount membrane filtration treatment membrane filtration treatment costs reduced driving operation amount calculating means for calculating a membrane filtration treatment costs information is an operating cost of the apparatus when the,
An operation support apparatus for a membrane filtration processing apparatus, comprising: a display device that displays the membrane filtration treatment cost information and the recommended operation amount of the membrane filtration treatment apparatus. In the operation support device that supports the operation control of the membrane filtration processing device that filters raw water,
Membrane filtration raw water quality information interface that captures raw water quality information inflow of membrane filtration treatment equipment including turbidity or UV absorbance of raw water,
Planned water volume information interface for fetching the planned water volume information given in advance;
A membrane parameter interface that captures pre-given membrane resistance and filtration factors;
Membrane filtration processing device current operation information interface for capturing membrane filtration processing device current operation information including transmembrane differential pressure information and filtration flow rate information of the membrane filtration processing device,
The rate of increase in transmembrane pressure difference during filtration or the rate of decrease in filtration flow rate from the past, the turbidity or UV absorbance, the planned water volume information, and the turbidity or UV absorbance function. based on cake ratio, to calculate the membrane filtration treatment apparatus recommended driving operation quantity including at least a filtration time and the backwash time is operating cost of the membrane filtration treatment apparatus when the pre Kimaku filtering processor recommended driving operation amount films Membrane filtration treatment cost reduction operation amount calculation means for calculating filtration treatment cost information,
An operation support apparatus for a membrane filtration processing apparatus, comprising: a display device that displays the membrane filtration treatment cost information and the recommended operation amount of the membrane filtration treatment apparatus. In any one of Claims 1 thru | or 3,
Membrane filtration processing device maintenance information interface that captures membrane filtration processing device maintenance information including chemical cleaning costs or membrane module replacement costs,
The membrane filtration processing cost reduction operation amount calculation means calculates membrane filtration processing cost information based on the calculated membrane filtration processing device recommended operation amount and the membrane filtration processing device maintenance information. Driving support device for the processing device. In any one of Claims 1 thru | or 4,
Using a continuous function that models the temporal change in the transmembrane pressure difference immediately after the backwash process is completed, equipped with a chemical cleaning time prediction means that calculates the chemical cleaning prediction time of the membrane,
An operation support apparatus for a membrane filtration processing apparatus, characterized in that the predicted chemical cleaning time is displayed on a screen. In claim 3 ,
Based on the current operation information of the membrane filtration apparatus and the planned water volume information, comprising a membrane exchange time prediction means for calculating a membrane replacement prediction time,
An operation support apparatus for a membrane filtration processing apparatus, characterized by displaying a predicted replacement time. In any one of Claims 1 thru | or 6,
A pretreatment device having the ability to remove turbidity is provided in the previous stage of the membrane filtration treatment device,
A pretreatment device raw water quality information interface that captures information of the raw water quality of the inflow into the pretreatment device;
Pretreatment device operation condition setting means for setting operation conditions of the pretreatment device;
Based on the planned water volume information, the pretreatment apparatus inflow raw water quality information, and the operating condition information of the pretreatment apparatus, the water quality of the pretreatment apparatus outlet and the pretreatment cost by the pretreatment apparatus are calculated, and the pretreatment apparatus outlet A pretreatment device water quality / cost calculation means for giving water quality information to the membrane filtration raw water quality information interface;
It is determined whether the total of the pretreatment cost calculated by the pretreatment device water quality / cost calculation means and the membrane filtration treatment cost is an optimum value, and if it is not the optimum value, at least the pretreatment device operation condition setting means Comprehensive processing cost judgment means for outputting a preprocessing operation condition setting change signal for changing the setting,
Membrane characterized in that when the total of the pretreatment cost and the membrane filtration treatment cost is an optimum value by the total treatment cost judgment means, the operation amount information of the pretreatment device is displayed on the display device. Operation support device for filtration equipment. In any one of Claims 1 thru | or 6.
A flocculation / precipitation treatment device is provided upstream of the membrane filtration treatment device,
A coagulation sedimentation treatment apparatus raw water quality information interface that captures information on the quality of the raw water flowing into the coagulation sedimentation treatment apparatus,
A coagulation sedimentation treatment device operating condition setting means for setting the operation conditions of the coagulation sedimentation treatment device;
Based on the planned water amount information, the raw water quality information of the coagulation sedimentation treatment apparatus inflow, and the operating condition information of the coagulation sedimentation treatment equipment, the water quality at the coagulation sedimentation equipment outlet and the processing cost by the coagulation sedimentation treatment equipment are calculated, and the coagulation sedimentation treatment Coagulation / precipitation treatment equipment water quality / cost calculation means to give the water quality at the outlet of the equipment to the membrane filtration raw water quality information interface,
It is determined whether the sum of the processing cost by the coagulation sedimentation processing device and the membrane filtration processing cost is an optimal value. If the total value is not the optimal value, the operation condition setting is changed to the coagulation sedimentation device operating condition setting means. Comprehensive processing cost judgment means for outputting a coagulation sedimentation processing operation condition setting change signal,
When the total processing cost of the coagulation sedimentation processing device and the membrane filtration processing cost is an optimum value by the comprehensive processing cost judgment means, the operation operation amount information of the coagulation sedimentation processing device is displayed on the screen. Operation support device for membrane filtration processing equipment.

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