Process calculation method, calculation program and calculation system for water treatment process

Abstract

A process calculation method for a water treatment process having a plurality of water treatment unit processes, the water treatment process flow formed by disposing cell icons of the water treatment unit processes and a process of wiring between the cell icons being provided with the following steps A-D: A: determining the calculation order of the cell icons on the basis of a predetermined rule; a step B of calculating at least one item of the flow, the water quality, the temperature and the water pressure of the treated water for each unit icon according to the calculation sequence after the step A, and a step C of calculating at least one item of the flow, the water quality, the temperature and the water pressure of the treated water for each unit icon according to the calculation sequence after the step B, and a step D in which, after the step C, at least one item of the flow rate, water quality, temperature, and water pressure of the treated water estimated in the step B is adjusted such that no contradiction occurs between the material balance and energy balance, and a determination is made as to whether or not the step B and the step C need to be repeatedly executed.

Description

Technical Field

[0001] The present invention relates to a process calculation method, a calculation program (program product) and a calculation system for a water treatment process in which raw water is treated to obtain treated water. Background Art

[0002] The water treatment process selects or combines water treatment devices such as sedimentation separation, flotation separation, centrifugal separation, coagulation treatment, stirring treatment, aerobic treatment, anaerobic treatment, filtration, pressing, filter cloth, precision filtration membrane, ultrafiltration membrane, nanofiltration membrane, reverse osmosis membrane, promoted oxidation, ion exchange, adsorption, absorption, degassing, crystallization, distillation, heat exchange, and mineral addition according to the properties of the raw water and the use of the produced water.

[0003] In recent years, membrane separation methods have been widely used in various fields due to their advantages, such as energy conservation, space saving, and improved treated water quality. For example, the use of microfiltration membranes or ultrafiltration membranes in water purification processes for producing industrial water and tap water from river water, groundwater, and treated sewage water, and the use of reverse osmosis membranes in seawater desalination, can be cited. Furthermore, various water treatment processes have been designed and introduced, including pretreatments for these separation membranes, such as combining sedimentation separation, flotation separation, centrifugal separation, and coagulation to stabilize the operability of the separation membranes, or combining ion exchange with post-treatment for efficient use in pure water production.

[0004] In such a water treatment process, the treatment flow of the water treatment process using each water treatment device is usually predetermined, and water treatment process calculations such as water balance calculation, heat balance calculation, and material balance calculation are performed using simulation software on a computer according to the treatment flow.

[0005] Patent Document 1 describes a simulation calculation in which the entire chemical process is simulated by connecting units such as reactors and distillation columns on a computer, and a sequential modular calculation method is used to perform design calculations for each unit sequentially from the upstream side to estimate the steady state of the chemical process.

[0006] However, in processes involving circulating flows, i.e., processes in which calculation results of downstream units are provided to upstream units, this calculation method is difficult to apply because calculations cannot be performed due to insufficient input information required for calculations of upstream units.

[0007] In addition, in view of the above-mentioned issues, Patent Document 2 records the preparation of a treatment flow chart for a water treatment system, the setting of initial values, and the calculation of the water balance, heat balance, and material balance of each water treatment device unit in sequence, followed by simulation calculations for the design of each unit (calculation of the required number of reverse osmosis membrane elements, the required power of the pump, etc.).

[0008] However, in actual water treatment processes, the water, heat, and material budgets of each unit, as well as design calculations, interact with each other, leading to reduced calculation accuracy using the aforementioned methods. Furthermore, in actual water treatment system design, design conditions such as the number of reverse osmosis membrane elements are sometimes predetermined due to limitations such as installation space. The aforementioned methods, which perform the final design calculations, require repeated calculations while searching for water and material budgets that meet the specified design conditions, sometimes requiring considerable effort.

[0009] Prior art literature

[0010] Patent Document 1: Japanese Patent Application Laid-Open No. 7-311762

[0011] Patent Document 2: Japanese Patent No. 6107303 Summary of the Invention

[0012] Problems to be solved by the invention

[0013] An object of the present invention is to provide a method for quickly and accurately calculating all water treatment processes including complex processes including circulation flows in a water treatment process for obtaining treated water by treating raw water.

[0014] Means for solving problems

[0015] In order to solve the above-mentioned problems, the present invention provides a process calculation method for a water treatment process having multiple water treatment unit processes, which is characterized in that the water treatment process flow formed by configuring unit icons of the water treatment unit processes and wiring between the unit icons has the following processes A to D.

[0016] A. A process of determining the calculation order of the unit icons based on a predetermined rule.

[0017] B. After step A, a step of estimating at least one of the flow rate, water quality, temperature, and water pressure of the treated water for each of the unit icons according to the calculation sequence.

[0018] C. After step B, regarding the water treatment process, a step is performed to adjust at least one of the flow rate, water quality, temperature, and water pressure of the raw water or treated water calculated in step B so that there is no contradiction in the material balance or energy balance.

[0019] D. After the step C, it is determined whether the steps B and C need to be repeated.

[0020] Effects of the Invention

[0021] According to the process calculation method of the water treatment process of the present invention, all water treatment processes including complex processes including circulation flows can be calculated with high accuracy and speed, thereby contributing to accurate and rapid design of the water treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a flowchart showing an example of a water treatment process according to the embodiment.

[0023] Figure 2 This is a flowchart showing an example of a calculation method according to the embodiment.

[0024] Figure 3 This is a flowchart showing an example of a calculation method according to the embodiment.

[0025] Figure 4 This is a flowchart showing an example of a calculation method according to the embodiment.

[0026] Figure 5 This is a flowchart showing an example of a calculation method according to the embodiment.

[0027] Figure 6 This is a flowchart showing an example of a calculation method according to the embodiment.

[0028] Figure 7 This is a flowchart showing an example of a water treatment process according to the embodiment.

[0029] Figure 8 This is a flowchart showing an example of a water treatment process according to the embodiment.

[0030] Figure 9 This is a flowchart showing an example of a water treatment process according to the embodiment.

[0031] Figure 10 This is a schematic diagram showing an example of an embodiment.

[0032] Figure 11 This is a schematic diagram showing an example of an embodiment. DETAILED DESCRIPTION

[0033] Hereinafter, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. In addition, the following description will be given using a water treatment process using an ultrafiltration membrane and a reverse osmosis membrane as an example, but the present invention is not limited to the following embodiments.

[0034] The water treatment process of this embodiment is as follows. Figure 1The diagram shows a process for treating raw water 1 using a membrane treatment method using an ultrafiltration membrane 2 and a reverse osmosis membrane 3 to produce produced water 4. In water treatment processes, three types of water must exist: raw water, produced water, and wastewater. Raw water is treated in various water treatment devices, ultimately separating it into produced water and wastewater. Raw water is the solution processed in the water treatment process. Examples include river water, groundwater, seawater, sewage treatment water, factory wastewater, and culture medium.

[0035] The raw water 1 is transported by the raw water pump 5 to the ultrafiltration membrane 2 for filtration. Figure 1 Ultrafiltration membrane is described in the literature, but there is no problem with precision filtration membrane. In addition, as the pore size of the separation membrane used in ultrafiltration membrane or precision filtration membrane, as long as it is porous, there is no particular limitation, but according to the property of the desired processed water or the water yield, sometimes a membrane with different pore sizes is used. As the shape of the separation membrane, there are hollow fiber membranes, flat membranes, tubular membranes, monolithic membranes, etc., which can be any one. In addition, as the material of the separation membrane, it is preferably containing at least one of the inorganic materials selected from polyethylene, polypropylene, polyacrylonitrile, ethylene-tetrafluoroethylene copolymer, polychlorotrifluoroethylene, polytetrafluoroethylene, polyvinyl fluoride, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, chlorotrifluoroethylene-ethylene copolymer, polyvinylidene fluoride, polysulfone, cellulose acetate, polyvinyl alcohol and polyethersulfone, ceramics, and then from the viewpoint of membrane strength and chemical resistance, more preferably polyvinylidene fluoride (PVDF), from the viewpoint of high hydrophilicity and strong stain resistance, more preferably polyacrylonitrile.

[0036] In addition, although the ultrafiltration membrane has been described so far, it is generally inserted into a housing as a module, and multiple modules are used as a unit depending on the operating conditions (raw water properties, filtered water volume). As a membrane filtration method, it can be a full-flow filtration type module or a cross-flow filtration type. The full-flow filtration type is preferred from the perspective of low energy consumption. In addition, it can be a pressurized type or an immersion type. The pressurized type is preferred from the perspective of high-flow operation. In addition, it can be an external pressure type in which raw water is supplied from the outside of the membrane and permeated water is obtained from the inside, or it can be an internal pressure type in which raw water is supplied from the inside of the membrane and permeated water is obtained from the outside. The external pressure type is preferred from the perspective of simplicity of pretreatment.

[0037] exist Figure 1 The figure shows a pressurized type of ultrafiltration membrane. In the case of an immersed separation membrane, although not shown in the figure, in order to filter the treated liquid using the immersed separation membrane, a pump or the like can be set on the secondary side of the immersed membrane separation for suction. In order to filter using the pressure head pressure difference as the driving force, the liquid level of the filter water tank can be lower than the liquid level of the treated liquid tank.

[0038] In the case of immersed membrane separation, air purge is performed using air supplied continuously or intermittently from a blower. Air is supplied from the blower to the immersed membrane through a diffuser located below the membrane. The resulting flow of liquid or a gas-liquid mixture parallel to the membrane surface removes suspended matter adhering to the membrane surface. The typical operating sequence consists of a filtration phase and a shutdown phase. Air purge by the blower is generally maintained during both phases. During the shutdown phase, operation is performed while removing suspended matter accumulated during the filtration phase from the membrane surface.

[0039] The membrane used in the membrane element constituting the immersed separation membrane is not particularly limited and may be either a flat membrane or a hollow fiber membrane. The membrane structure is also not particularly limited and may include, for example, a flat membrane element structure, a spirally wound flat membrane element structure, a flat membrane pair comprising two flat membranes disposed with their permeate-side surfaces facing each other, a water collection channel disposed between the flat membranes, and a flexible sealing portion at the periphery of the flat membranes for sealing the flat membranes, and a hollow fiber membrane element structure comprising a bundle of multiple hollow fiber membranes.

[0040] Reverse osmosis membrane is processed and arranged in the device as reverse osmosis membrane element, and there are spiral elements formed by winding a flat membrane around a water collecting pipe, modular plate-frame elements in which components with flat membranes are affixed to both sides of a plate-type support plate are stacked at certain intervals across a spacer, and tubular elements using tubular membranes, hollow fiber membranes are bundled and accommodated in a housing. As the form of the element, any form can be used, and spiral elements are preferably used from the viewpoint of operability and interchangeability. In addition, the number of elements can be arbitrarily set according to membrane performance. As raw materials, for example, polyamide, polypiperazineamide, polyesteramide or materials cross-linked from water-soluble vinyl polymers can be used, as its membrane structure, a membrane (asymmetric membrane) having a dense layer on at least one side of the membrane, a microporous membrane with an pore size gradually increasing from the dense layer to the membrane interior or the other side, a membrane (composite membrane) having a very thin separation functional layer formed by other materials on the dense layer of such an asymmetric membrane, etc. However, for high water production, composite membranes are preferred. Among them, polyamide composite membranes are preferred, and piperazine polyamide composite membranes are more preferred from the perspectives of water permeation rate, chemical resistance, and the like.

[0041] The ultrafiltration membrane 2 is subjected to a physical cleaning process (reverse cleaning, air cleaning, drainage, and water supply) at regular intervals after a predetermined period of filtration, and operates while removing suspended matter (dirt) captured by the ultrafiltration membrane. In reverse cleaning, filtered water of the ultrafiltration membrane 2 is generally used, and a branch 6 of the filtered water wiring is branched off to backwash the ultrafiltration membrane with filtered water, or a backwash pump is used to transport liquid to the ultrafiltration membrane from a filtered water tank that temporarily stores filtered water (not shown). In addition, an air cleaning blower 7 is provided for air cleaning. Although an air cleaning blower is shown in the figure, the air generation source may also be a compressor. In the case of a compressor, an oil-free type is preferably used so that the oil in the air will not be supplied to the separation membrane.

[0042] In addition, it is preferred to perform chemical enhanced backwashing (CEB) after repeated filtration and physical cleaning. CEB is performed by supplying chemical liquid to the backwash water using a backwash water chemical injection pump (not shown) during backwashing.

[0043] As the liquid chemical, aqueous solutions containing agents such as hydrochloric acid, sulfuric acid, nitric acid, citric acid, oxalic acid, ascorbic acid, sodium bisulfite, sodium hydroxide, and sodium hypochlorite can be used. Oxidants such as sodium hypochlorite are particularly effective in removing organic pollutants from seawater, river water, and sewage treatment water. The concentration of sodium hypochlorite is preferably between 10 mg / L and 10,000 mg / L. This is because concentrations below 10 mg / L result in insufficient cleaning effects, while concentrations above 10,000 mg / L increase the cost of the agent, making it uneconomical. From this perspective, a concentration of 100 mg / L to 5,000 mg / L is more preferred.

[0044] After adding the chemical solution, a certain contact time is required for better cleaning results. The membrane-chemical contact time is preferably between 5 minutes and 3 hours. This is because if the contact time is too short, the cleaning effect is weak, while if it is too long, the system will need to be stopped for a long time, reducing operating efficiency and being economically disadvantageous.

[0045] Next, the filtered water from the ultrafiltration membrane 2 is delivered by a supply pump 8, pressurized by a high-pressure pump 9, and supplied to the reverse osmosis membrane 3. Between the supply pump 8 and the high-pressure pump 9, a chemical injection device 10 injects a bactericide, antiscalant, and other chemicals to prevent fouling and scaling of the reverse osmosis membrane 3.

[0046] Furthermore, in the reverse osmosis membrane 3, when the salt concentration of the raw water is high, such as in seawater desalination, the supply pressure is sometimes increased to approximately 8 MPa by a high-pressure pump 9 to achieve an effective osmotic pressure. Therefore, to effectively utilize this energy, an energy recovery device 11 is sometimes provided. The illustrated energy recovery device is a pressure exchange type, consisting of the energy recovery device body and a booster pump. This energy recovery device adds the pressure of the concentrated water discharged from the reverse osmosis membrane 3 to the feed water to the reverse osmosis membrane, which branches off from the feed pump 8 and the high-pressure pump 9 via a branch 12. The concentrated water from the reverse osmosis membrane 3 is discharged as concentrated water after experiencing pressure loss in the raw water side flow path of the reverse osmosis membrane 3. However, due to pressure loss in the concentrated water piping and pressure loss in the energy recovery device, the pressure is lower than the feed pressure to the reverse osmosis membrane 3. Therefore, even if pressure is applied to the feed water to the reverse osmosis membrane, which branches off from the feed pump 8 and the high-pressure pump 9, it will still be at a lower pressure than the discharge pressure of the high-pressure pump 9. Therefore, the booster pump is provided to increase the pressure. The pressurized feed water then merges between the high-pressure pump 9 and the reverse osmosis membrane 3 through the mixer 13. Although the diagram shows a pressure exchange type, a counter-rotating pump type, a turbine type, and a turbocharger are also possible.

[0047] In this way, the flow of the water treatment process is composed of a combination of water flow (raw water, produced water, drainage), water treatment equipment (ultrafiltration membrane, reverse osmosis membrane (not shown, sedimentation separation, flotation separation, centrifugal separation, coagulation treatment, stirring treatment, aerobic treatment, anaerobic treatment, filtration, pressing, filter cloth, nanofiltration membrane, promoted oxidation, ion exchange, adsorption, absorption, degassing, crystallization, distillation, heat exchange, mineral addition)), energy recovery device (reverse pump type, turbine type, pressure exchange type, turbocharger), liquid medicine injection device, equipment (pump, blower, compressor, tank), and piping connection (mixing, branching), so that they can perform water treatment process calculations individually and collaboratively.

[0048] Therefore, it is necessary to study the required specifications while changing the treatment flow using these elements, and the water treatment process flow can be created and changed by arranging unit icons and connecting wiring along the flow direction of the water treatment process between the unit icons.

[0049] Here, the unit icon represents a water treatment unit process, which is characterized by at least one of the following.

[0050] A. Water flow (raw water, produced water, drainage)

[0051] B. Water treatment equipment (sedimentation separation, flotation separation, centrifugal separation, coagulation treatment, stirring treatment, aerobic treatment, anaerobic treatment, sand filtration, pressing, filter cloth, precision filtration membrane, ultrafiltration membrane, nanofiltration membrane, reverse osmosis membrane, promoted oxidation, ion exchange, adsorption, absorption, degassing, crystallization, distillation, heat exchange, mineral addition)

[0052] C. Energy recovery device (reverse pump type, turbine type, pressure exchange type, turbocharger)

[0053] D.Medicine injection device

[0054] E. Equipment (pumps, blowers, compressors, tanks)

[0055] F. Piping connection (mixing, branching)

[0056] Figure 2 It is a flowchart representing an example of a process calculation method for a water treatment process flow produced by wiring between unit icons, and comprises: A. a process for determining the calculation order of unit icons based on predetermined rules; B. a process for calculating at least one of the flow rate, water quality, temperature, and water pressure of treated water for each unit icon according to the calculation order after process A; C. a process for adjusting, with respect to the water treatment process flow, at least one of the flow rate, water quality, temperature, and water pressure of treated water calculated in process B after process B so as to avoid contradiction in material balance or energy balance; D. a process for determining whether it is necessary to repeat processes B and C after process C.

[0057] In addition, in actual water treatment process design, the flow rate is sometimes predetermined as the required specification, such as Figure 3 As shown, the flow rate of each wiring can be determined before or after the A step so that there is no contradiction in the flow rate balance.

[0058] Similarly, the water quality of salt or the like may be predetermined as a required specification, and the water quality of each line may be determined before or after step A so as to avoid any inconsistency in the water quality balance.

[0059] The rules for determining the calculation order of process A are not particularly limited. For example, a rule for determining the calculation order based on the order in which the unit icons are placed on the screen, a rule for determining the calculation order based on the order in which the user connects the wiring, or a rule for determining the calculation order from the unit icon located at the upper left of the screen toward the lower right may be adopted. An example of a rule for determining the calculation order of process A will be described later.

[0060] Step B is a step for estimating at least one of the following parameters: flow rate, water quality, temperature, and water pressure, which are predetermined for each unit icon. If necessary, a step may be included for determining predetermined calculation conditions or initial values ​​through user input before the start of water treatment process calculations. For example, in the case of a reverse osmosis membrane unit icon, the predetermined calculation conditions or initial values ​​refer to the type and number of reverse osmosis membrane elements.

[0061] Here, for a mixed inflow distribution, there are at least two or more unit icons. In the first process calculation of the unit icon, the flow rate, water quality, temperature, and water pressure of at least one of the inflow distributions are determined by input or calculation, while at least one of the flow rate, water quality, temperature, and water pressure of the other inflow distribution is undetermined. In this case, the inflow distribution for which any one of the flow rate, water quality, temperature, and water pressure is undetermined can be ignored, or the water treatment process calculation for the unit icon can be performed by inputting certain temporary values. However, if the calculation result at this time deviates too much from the final calculation result obtained by repeated calculation, the water treatment process calculation may not converge or may take a long time to converge. Therefore, it is preferable to set a flow rate, water quality, temperature, and water pressure that is closer to the final calculation result. For example, the flow rate, water quality, temperature, and water pressure of another inflow distribution for which any one of the flow rate, water quality, temperature, and water pressure is undetermined can be input.

[0062] Moreover, as described above, when the flow rates of each wiring have been determined before process B, there is a situation where the water quality, temperature, and water pressure of at least one inflow wiring are determined by input or calculation, and any one or more of the water quality, temperature, and water pressure of at least one other inflow wiring are not determined. At this time, any one or more of the water quality, temperature, and water pressure of another inflow wiring whose water quality, temperature, and water pressure have been determined can be input to the inflow wiring where any one or more of the water quality, temperature, and water pressure are not determined.

[0063] In process C, if there is a change in at least one of the flow rate, water quality, temperature, and water pressure of the wiring connected to any unit icon, and if the balance of flow rate, water quality, temperature, and water pressure in the unit icon connected to the other side of the wiring is inconsistent, it is sufficient to adjust the material balance or energy balance.

[0064] Here, the situation where at least one of the flow rate, water quality, temperature, and water pressure of the wiring connected to the unit icon changes refers to process B or process C itself. For all configured and connected unit icons, the material balance or energy balance is continuously adjusted until the balance of flow rate, water quality, temperature, and water pressure is consistent, so that the material balance or energy balance of the entire water treatment process flow can be consistent.

[0065] Here, the contradiction in the material balance or energy balance of the water treatment process flow or unit icon refers to a state where the error between the flow rate or salts and other substances or energy supplied to the system as a whole or each icon and the flow rate or salts and other substances or energy discharged from the system as a whole or each icon exceeds a predetermined specified value, and it can be judged as not contradictory when it is lower than the predetermined specified value.

[0066] In addition, as mentioned above, in actual water treatment process design, there are cases where the flow rate is predetermined as a required specification. Therefore, in particular, when the flow rate of treated water changes in process B, in process C, it is preferred to adjust the flow rate of raw water or treated water or both raw water and treated water so that there is no contradiction in the material balance of each unit icon.

[0067] If the contradiction between the material and energy balances of the water treatment process flow or unit diagram is not resolved before proceeding to the next step, inappropriate initial values ​​will be set in each unit diagram, resulting in an inappropriate solution. This may increase the number of calculations required to reach a suitable solution, or even lead to calculation termination if no solution is found. Therefore, the C step helps improve calculation accuracy and speed.

[0068] Process D only needs to be able to determine that if the water treatment process calculation reaches a stable state, the water treatment process calculation is terminated, and if the stable state is not reached, processes B and C are implemented again. Since it can be widely applicable to all water treatment processes, it is preferably determined that repeated execution is required before at least one or both of the following situations: the error in the material balance of the water treatment process flow is below a predetermined specified value, and the difference between the estimated result of process B of at least one of the production water unit icon and the drainage unit icon and the last estimated result is below a predetermined specified value.

[0069] An example of a rule for determining the calculation order of step A will be described below.

[0070] As described above, there are no special restrictions on the rules for determining the calculation order of process A. However, since the information on water supplied to each unit icon other than raw water needs to be received from the unit icon located upstream of the unit icon, in order to prevent inappropriate initial values ​​from being set in process B, resulting in inappropriate solutions, or an increase in the number of calculations until an appropriate solution is obtained, or the calculation is stopped because no solution is obtained, it is preferable to have rules for determining the calculation order along the direction of the wiring.

[0071] In addition, if there are uncalculated unit icons in process B, it is possible that the income and expenditure of any one of the flow rate, water quality, temperature, and water pressure in any unit icon or the entire water treatment process flow will be inconsistent, and it may be impossible to obtain the solution required by the user. Therefore, it is preferable to have a rule that determines the calculation order for all unit icons that form the water treatment process flow without omission.

[0072] Depending on the type of unit icon and its definition method, there may be unit icons in step B that do not require estimation of any of the flow rate, water quality, temperature, or water pressure. For example, if a produced water unit icon only accepts the flow rate, water quality, temperature, and water pressure estimated by the unit icon located upstream of it, then no flow rate, water quality, temperature, or water pressure needs to be estimated for that produced water unit icon in step B. In this case, even if the calculation order for the produced water unit is not set, it will not hinder the water treatment process calculation. This is equivalent to setting the calculation order for the produced water unit icon while setting the processing of the produced water unit icon in step B to remain unchanged for any of the flow rate, water quality, temperature, and water pressure. In this embodiment, no distinction is made between these two.

[0073] Furthermore, contrary to the above description, the calculation order may be opposite to the wiring direction, or the calculation may not be performed due to the fact that the unit icon to be calculated after a certain unit icon in step B is not a single unit icon. Therefore, it is preferable to have a rule to prevent the calculation order of a certain unit icon from duplicating with the calculation order of another unit icon. Examples of the rule to prevent duplication of the calculation order include a rule to set the calculation order starting from 1 to avoid duplication, a rule to set the calculation order for a unit icon that causes duplication of the calculation order to be different from the calculation order set for another unit icon, and the like.

[0074] Furthermore, for the same reason as the rule for avoiding duplication of calculation orders, it is preferable to have a rule for avoiding duplication of calculation orders when a calculation order is set for a unit icon, in addition to avoiding duplication when the calculation order is repeated. The rule for avoiding overwriting of calculation orders can include, for example, a rule for prohibiting changes to a calculation order once set for any unit icon, and a rule for restoring the original calculation order when the calculation order is overwritten.

[0075] Figure 4 This is a flowchart showing an example of a method for determining the calculation order of unit icons of process A, which has rules for determining the calculation order along the direction of wiring, rules for determining the calculation order for all unit icons that form a water treatment process flow without omission, rules for avoiding duplication of the calculation order of a certain unit icon with the calculation order of another unit icon, and rules for avoiding overwriting the calculation order when the calculation order is set for a certain unit icon. Process A is composed of the following processes A1 to A5.

[0076] Each process is as follows: A1. Select one of the raw water unit icons, set the calculation order of the selected raw water unit icon to "1", cancel the selection of the raw water unit icon, select a downstream unit icon through the outflow distribution line flowing out of the raw water unit icon, and move to the process of the following A2 process; A2. For the calculation order of the unit icon selected in A1 and any of the processes A4 and A5 described later, set a value of 1 plus the maximum value of the set calculation order for all the unit icons forming the water treatment process flow, and move to the process of the following A3 process; A3. If the unit icon selected in A1 and any of the processes A4 and A5 described later is not a production water unit icon or a drainage unit icon, move to the following A4 process, and in A1 and In the case where the unit icon selected in any of the processes A4 and A5 described later is a production water unit icon or a drainage unit icon, the selection of the unit icon is canceled and the process is moved to the following A5 process; A4. The selection of the unit icon selected in A1 and any of the processes A4 and A5 is canceled, and a downstream unit icon is selected through one of the outflow wirings flowing out of the unit icon, and the process is moved to the A2 process; A5. In the case where there is an unpassed outflow wiring flowing out of a unit icon whose calculation sequence has been determined in the water treatment process flow, the unit icon into which the outflow wiring flows is selected and the process is moved to the A2 process, and in the case where there is no unpassed outflow wiring flowing out of a unit icon whose calculation sequence has been determined, the A process is ended.

[0077] Here, in order to prevent the A4 process from being unable to be implemented, the A3 process skips the A4 process if there is no wiring downstream of the unit icon selected in any of the processes A1, A4, and A5. The unit icon with no wiring downstream is, for example, equivalent to the production water unit icon or the drainage unit icon.

[0078] In addition, in the A4 process, when there are more than two outflow lines downstream of a unit icon such as a reverse osmosis membrane unit icon or a branch unit icon, selection is made from any outflow line, or according to a predetermined rule, for example, if it is predetermined that it is a reverse osmosis membrane unit icon, the rule of giving priority to permeated water is used. This is preferred because the calculation order of all unit icons constituting the water treatment process flow can be determined efficiently and without omission.

[0079] In addition, in the A5 process, when there are multiple outflow wirings that have not passed from the unit icon whose calculation order has been determined, any one of the unit icons to which the outflow wiring is connected as the inflow wiring can be selected. It can also be based on a predetermined rule. For example, if a rule is predetermined to give priority to the unit icon into which the wiring flowing out of the unit icon set on the upstream side is flowed, it can be quickly moved to the next process, so it is more preferred.

[0080] Figure 7 This is a flow chart showing an example of a water treatment process according to this embodiment. Figure 7 An example of a method for determining the calculation order of the unit icons in steps A1 to A5 will be described. Here, in step A4, a rule is set to prioritize permeate water over concentrate water in the reverse osmosis membrane unit icon.

[0081] At this time, first go through the A1 process: "A1. Select one of the raw water unit icons, set the calculation order of the selected raw water unit icon to "1", cancel the selection of the raw water unit icon, select a downstream unit icon through the outflow distribution line flowing out of the raw water unit icon, and move to the following A2 process", select raw water unit icon 1, and determine the calculation order to "1", select to move from raw water unit icon 1 to high-pressure pump unit icon 9, and move to the A2 process.

[0082] Then, through the A2 process: "A2. For the calculation order of the unit icons selected in A1 and any of the processes A4 and A5 described later, set a value of 1 to the maximum value of the calculation order set for all the unit icons forming the water treatment process flow, and move to the following A3 process", the calculation order of the high-pressure pump unit icon 9 is determined to be "2", which is 1 added to the maximum calculation order so far, and move to the A3 process.

[0083] Then in the A3 process: "A3. If the unit icon selected in A1 and any of the following A4 and A5 processes is not the production water unit icon or the drainage unit icon, move to the following A4 process; if the unit icon selected in A1 and any of the following A4 and A5 processes is the production water unit icon or the drainage unit icon, cancel the selection of the unit icon and move to the following A5 process", since the high-pressure pump unit icon 9 is neither production water nor drainage, it moves to the A4 process.

[0084] Then, through process A4: "A4. Release the selection of the unit icon selected in any of processes A1 and A4 and A5, select a downstream unit icon through one of the outflow lines flowing out of the unit icon, and move to the process of the A2 process", select to move from the high-pressure pump unit icon 9 to the reverse osmosis membrane unit icon 3, and return to process A2.

[0085] Similarly, by repeating steps A2, A3, and A4, the calculation order of the reverse osmosis membrane unit icon 3 is successively determined to be "3" and the calculation order of the produced water unit icon 4 is successively determined to be "4".

[0086] In step A3 immediately after the calculation order of the produced water unit icon 4 is determined, since the selected unit icon is produced water, the process moves to step A5 after the selection of the produced water unit icon 4 is canceled.

[0087] Then in process A5: "A5. When there is an outflow wiring that fails to flow out from a unit icon whose calculation sequence has been determined in the water treatment process, select the unit icon into which the outflow wiring flows and move to process A2. When there is no outflow wiring that fails to flow out from a unit icon whose calculation sequence has been determined, end process A", since the reverse osmosis membrane unit icon 3 is equivalent to "the situation where there is an outflow wiring that fails to flow out from a unit icon whose calculation sequence has been determined" in process A5, the unit icon into which the outflow wiring fails to flow in, i.e., the drainage unit icon 14, is selected and returns to process A2.

[0088] After the calculation order of the drainage unit icon 14 is determined to be "5" in step A2, the process proceeds through step A3 to step A5 in the same manner as when the produced water unit icon 4 is selected.

[0089] At this point, it is equivalent to "there is no outflow wiring that does not pass from the unit icon whose calculation order has been determined" in the A5 process, so the A process is completed at this point, forming Figure 7 The calculation order of the unit icons is raw water unit icon 1: "1", high-pressure pump unit icon 9: "2", reverse osmosis membrane unit icon 3: "3", produced water unit icon 4: "4", drainage unit icon 14: "5".

[0090] Figure 5 and Figure 4 Similarly, this is a flowchart showing another example of a method for determining the calculation order of unit icons in process A, which has rules for determining the calculation order along the wiring direction, determining the calculation order for all unit icons forming the water treatment process without omission, avoiding the duplication of the calculation order of a certain unit icon with the calculation order of another unit icon, and avoiding overwriting the calculation order when the calculation order is set for a certain unit icon. This determination method does not violate the above rules even in a water treatment process including more complex circulation wiring. Figure 4 There is a process 6 between process A4 and process A2, which moves to process A5 when the calculation order of the unit icons selected in any of processes A1, A4, and A5 is determined, and moves to process A2 when the calculation order of the unit icons selected in any of processes A1, A4, and A5 is not determined. In A5, if there is an outflow wiring that does not pass from the unit icon whose calculation order has been determined, the unit icon into which the outflow wiring flows is selected and moves to process A6.

[0091] Figure 8 This is a flow chart showing another example of the water treatment process of this embodiment. Figure 8An example of a method for determining the order of calculating unit icons in steps A1 to A6 will be described.

[0092] and Figure 7 The same is true for the situation. In the A4 process, the permeate water and concentrated water of the reverse osmosis membrane unit icon are set as the rule of giving priority to the permeate water. Furthermore, in the A4 process, the right outflow wiring and the left outflow wiring of the branch unit icon 12 are set as the rule of giving priority to the right outflow wiring. Furthermore, in the A5 process, the rule is set as the rule of giving priority to the unit icon flowing in from the wiring flowing out of the unit icon set on the further upstream side.

[0093] At this time, with Figure 7 The same as the case of , through the A1 process and A2, the calculation order of the raw water unit icon 1 and the subsequent mixing unit icon 13 is determined to be "1" and "2" respectively.

[0094] Then, after passing through steps A3 and A4, with the first high-pressure pump unit icon 15 selected, the process reaches step A6, which "transitions to step A5 if the calculation order of the unit icons selected in any of steps A1, A4, and A5 is determined, and transitions to step A2 if the calculation order of the unit icons selected in any of steps A1, A4, and A5 is not determined." At this point, since the first high-pressure pump unit icon 15 corresponds to "the case where the calculation order of the unit icons selected in any of steps A1, A4, and A5 is not determined" in step A6, the process transitions to step A2.

[0095] Similarly, by repeating processes A2, A3, A4, and A6, the calculation order of the first high-pressure pump unit icon 15, the first reverse osmosis membrane unit icon 17, the second high-pressure pump unit icon 16, the second reverse osmosis membrane unit icon 18, and the first produced water unit icon 19 are determined to be "3", "4", "5", "6", and "7" respectively.

[0096] In step A3 immediately after the calculation order of the first produced water unit icon 19 is determined, since the first produced water unit icon 19 is the produced water unit icon, the first produced water unit icon 19 is deselected and the process proceeds to step A5.

[0097] Here, the first reverse osmosis membrane unit icon 17 and the second reverse osmosis membrane unit icon 18 correspond to the "case where there is an outflow line that has not passed through" in step A5. As described above, the rule prioritizes selecting unit icons that flow in from lines that flow out of unit icons located further upstream. Therefore, at this point, the drain unit icon 14, into which the concentrated water from the first reverse osmosis membrane unit icon 17 flows, is selected, and the process proceeds to step A6.

[0098] At this time, since the calculation order of the drainage unit icon 14 is not determined, it moves to the A2 process. Then, in the A2 process, the calculation order of the drainage unit icon 14 is determined to be "8". The selection of the drainage unit icon 14 is released through the subsequent A3 process, and it moves to the A5 process.

[0099] At this moment, the unit icon corresponding to the "situation in which there is an outflow wiring that does not pass through the unit icon whose calculation order has been determined" in the A5 process is only the second reverse osmosis membrane unit icon 18, so the branch unit icon 12 into which the concentrated water of the second reverse osmosis membrane unit icon 18 flows is selected, and the process moves to the A6 process.

[0100] Here, since the "rule of giving priority to the right outflow wiring of the branch unit icon 12 and the left outflow wiring of the branch unit icon 12" is set in advance, the calculation order of the branch unit icon 12 and the second production water unit icon 20 is determined to be "9" and "10" respectively after going through A6, A2, A3, A4, A6, and A2 processes in sequence.

[0101] Next, in step A3, since the second produced water unit icon 20 represents produced water, it is deselected, and the process proceeds to step A5. At this point, the branch unit icon corresponds to the situation in step A5 where "there is an outflow line that does not pass through from a unit icon whose calculation order has been determined." Therefore, the mixing unit icon 13, to which the outflow line on the left of the branch unit icon flows, is selected, and the process proceeds to step A6.

[0102] Here, since the calculation order of the mixed unit icon 13 has been determined to be "2", it corresponds to "the case where the calculation order of the unit icon selected in any one of the steps A1, A4, and A5 has been determined" in the A6 step, so it moves to the A5 step.

[0103] At this point, it is equivalent to "there is no outflow wiring that does not pass from the unit icon whose calculation order has been determined" in the A5 step, so the A step is completed and the Figure 8 An example of the unit icon calculation order of the unit icons is raw water unit icon 1: "1", mixing unit icon 13: "2", first high-pressure pump unit icon 15: "3", first reverse osmosis membrane unit icon 17: "4", second high-pressure pump unit icon 16: "5", second reverse osmosis membrane unit icon 18: "6", first produced water unit icon 19: "7", drainage unit icon 14: "8", branch unit icon 12: "9", second produced water unit icon 20: "10".

[0104] Figure 6 and Figure 4 and Figure 5Similarly, this is a flowchart showing another example of a method for determining the calculation order of unit icons in process A, which has rules for determining the calculation order along the wiring direction, for determining the calculation order for all unit icons forming the water treatment process flow without omission, for preventing the calculation order of a certain unit icon from being repeated with the calculation order of another unit icon, and for preventing the calculation order of a certain unit icon from being overwritten when the calculation order is set for the unit icon. This calculation method does not violate the above rules even when the water treatment process flow contains two or more raw water unit icons. Figure 5 During the transition from process A5 to the process ending process A, there is a process of selecting the raw water unit icon and transitioning to process A2 when there is a raw water unit icon with an undetermined calculation order, and ending process A7 when there is no raw water unit icon with an undetermined calculation order, and each of processes A2, A3, A4, and A6 is based on the unit icon selected in any of processes A1, A4, A5, and A7.

[0105] Figure 9 This is a flow chart showing another example of the water treatment process of this embodiment. Figure 9 An example of a method for determining the order of calculating unit icons in steps A1 to A7 will be described.

[0106] and Figure 8 The same is true for the situation. In the A4 process, the permeate water and concentrated water of the reverse osmosis membrane unit icon are set as the rule of giving priority to the permeate water. In the A4 process, the right outflow wiring and the left outflow wiring of the branch unit icon 12 are set as the rule of giving priority to the right outflow wiring. In the A5 process, the rule is set as the rule of giving priority to the unit icon flowing in from the wiring flowing out of the unit icon set on the further upstream side.

[0107] At this time, with Figure 8 The situation is the same. Through the processes A1, A2, A3, A4, A5, and A6, the calculation order is determined as the first raw water unit icon 21: "1", the first mixing unit icon 23: "2", the second mixing unit icon 24: "3", the first high-pressure pump unit icon 15: "4", the first reverse osmosis membrane unit icon 17: "5", the second high-pressure pump unit icon 16: "6", the second reverse osmosis membrane unit icon 18: "7", the first produced water unit icon 19: "8", the drainage unit icon 14: "9", the branch unit icon 12: "10", and the second produced water unit icon 20: "11".

[0108] In the A5 process after the calculation order of the second production water unit icon 20 is determined, since it is equivalent to "there is no unpassed outflow distribution line flowing out from the unit icon whose calculation order has been determined" in the A5 process, it moves to the A7 process "If there is a raw water unit icon whose calculation order has not been determined, select the raw water unit icon and move to the A2 process, and if there is no raw water unit icon whose calculation order has not been determined, end the process of process A". Since the second raw water unit icon 22 is equivalent to "there is a raw water unit icon whose calculation order has not been determined" in the A7 process, the second raw water unit icon 22 is selected and moved to the A2 process.

[0109] In step A2, after the calculation order of the second raw water unit icon 22 is determined to be "12", the process moves to steps A3, A5, and A7 in order. This is equivalent to "there is no raw water unit icon whose calculation order is not determined" in step A7, so step A ends, forming Figure 9 An example of the order of calculating the unit icons of the unit icons is the first raw water unit icon: "1", the first mixing unit icon: "2", the second mixing unit icon: "3", the first high-pressure pump unit icon: "4", the first reverse osmosis membrane unit icon: "5", the second high-pressure pump unit icon: "6", the second reverse osmosis membrane unit icon: "7", the first produced water unit icon: "8", the drainage unit icon: "9", the branch unit icon: "10", the second produced water unit icon: "11", the second raw water unit icon: "12".

[0110] In this way, process A, which is composed of any one or more of processes A1 to A7, can quickly and comprehensively determine the calculation order for all unit icons forming the water treatment process flow from the raw water to the downstream side, thereby helping to improve the overall calculation accuracy and speed of the water treatment process calculation.

[0111] The solution of the present invention, such as Figure 10 As shown in the schematic diagram of the system configuration as an example of an embodiment of the present invention, the water treatment process calculation method can be stored as a program readable by a computer 30 in a computer-readable recording medium having the program recorded thereon. In this case, the water treatment process calculation program is stored in a recording medium such as a hard disk of the computer.

[0112] As an example, the computer 30 includes a water treatment process calculation program 31, a water treatment process input unit 32, a water treatment process storage unit 33, a water treatment process calculation result storage unit 41, and a water treatment process calculation result output unit 42. Furthermore, the water treatment process calculation program 31 includes a water treatment process reading unit 34, a unit icon calculation order determination unit 35, a unit icon calculation order determination rule storage unit 36, a unit icon calculation unit 37, a material or energy balance calculation unit 38, a convergence determination unit 39, and a water treatment process calculation result storage unit 40.

[0113] In addition, if Figure 11 As shown in the schematic diagram of the system configuration as another example of an embodiment of the present invention, the system for storing the recording medium may be a server 44 such as an on-site server or a cloud server.

[0114] exist Figure 11 In the example, the entire system is composed of a computer 30 and a server 44. The computer 30 includes a water treatment process input unit 32 and a water treatment process calculation result output unit 42, as well as a browser 43 that can access them. The server 44 includes a water treatment process calculation program 31, a water treatment process storage unit 33, and a water treatment process calculation result storage unit 41. The structure of the water treatment process calculation program 31 is similar to that of the server 44. Figure 10 same.

[0115] In this manner, when the water treatment process calculation program is stored in the server 44, a system is preferably used in which the program is accessed through the browser 43 on the computer 30 and the water treatment process calculation program is executed to perform calculations.

[0116] In addition, this application is based on Japanese patent application (Japanese Patent Application No. 2023-11786) filed on January 30, 2023, the contents of which are incorporated herein by reference.

[0117] Description of Reference Numerals

[0118] 1: Raw water

[0119] 2: Ultrafiltration membrane

[0120] 3: Reverse osmosis membrane

[0121] 4: Produced water

[0122] 5: Raw water pump

[0123] 6: Filtered water branch

[0124] 7: Air cleaning blower

[0125] 8: Supply pump

[0126] 9: High-pressure pump

[0127] 10: Drug injection device

[0128] 11: Energy recovery device

[0129] 12: Branch

[0130] 13: Mixed

[0131] 14: Drainage

[0132] 15: First high-pressure pump

[0133] 16: Second high-pressure pump

[0134] 17: The first reverse osmosis membrane

[0135] 18: Second reverse osmosis membrane

[0136] 19: First production water

[0137] 20: Second production water

[0138] 21: First Raw Water

[0139] 22: Second Raw Water

[0140] 23: First Mix

[0141] 24: Second Mix

[0142] 30: Computer

[0143] 31: Water treatment process calculation program

[0144] 32: Water treatment process input unit

[0145] 33: Water treatment process storage unit

[0146] 34: Water treatment process reading unit

[0147] 35: Unit icon calculation order determines the unit

[0148] 36: Cell icon calculation order determination rule storage unit

[0149] 37: Unit Icon Calculation Unit

[0150] 38: Material or energy budget calculation unit

[0151] 39: Convergence determination unit

[0152] 40: Water treatment process calculation result storage unit

[0153] 41: Water treatment process calculation result storage unit

[0154] 42: Water treatment process calculation result output unit

[0155] 43: Browser

[0156] 44: Server

Claims

1. A process calculation method for a water treatment process, which is a process calculation method for a water treatment process having multiple water treatment unit processes, characterized in that: The water treatment process flow formed by arranging unit icons of the water treatment unit process and the process of wiring between the unit icons includes the following steps A to D. Step A: Determine the calculation order of the unit icons based on predetermined rules. Step B: After step A, calculate at least one of the flow rate, water quality, temperature, and water pressure of the treated water for each of the unit icons according to the calculation sequence. Step C: After step B, with respect to the water treatment process, adjusting at least one of the flow rate, water quality, temperature, and water pressure of the raw water or treated water calculated in step B so as to avoid any inconsistency in the material or energy balance. Step D: After step C, determine whether steps B and C need to be repeated.

2. The process calculation method for a water treatment process according to claim 1, characterized in that: Before or after the step of determining the calculation order of the unit icons in the step A, at least one of a step of calculating the balance of flow rate and a step of calculating the balance of water quality for the water treatment process is provided.

3. The process calculation method for a water treatment process according to claim 1 or 2, characterized in that: When the flow rate of treated water is estimated in the step B, the flow rate of raw water or treated water is adjusted in the step C so that the error in the balance of substances for each of the cell icons becomes equal to or smaller than a predetermined value.

4. The process calculation method for a water treatment process according to any one of claims 1 to 3, characterized in that: In the process of calculating at least one of the flow rate, water quality, temperature and water pressure of the treated water for each of the unit icons in the calculation order of the process B, when the water treatment process flow includes a mixed unit icon with at least two inflow lines, and when the flow rate, water quality, temperature and water pressure of at least one of the inflow lines of the unit icon are determined by input or calculation, while any one of the flow rate, water quality, temperature and water pressure of at least one other inflow line is not determined, any one of the flow rate, water quality, temperature and water pressure of the inflow line whose flow rate, water quality, temperature and water pressure is determined is input to the inflow line whose flow rate, water quality, temperature and water pressure is not determined, to calculate at least one of the flow rate, water quality, temperature and water pressure of the treated water.

5. The process calculation method for a water treatment process according to any one of claims 1 to 4, characterized in that: In the process of determining the calculation order of the unit icons in the A process, the wiring is arranged along the direction of the water treatment process, the calculation order is determined along this direction, and the calculation order is determined without omission for all the unit icons forming the water treatment process flow.

6. The process calculation method for a water treatment process according to any one of claims 1 to 5, characterized in that: In the step of determining the calculation order of the unit icons in the step A, the calculation order of a certain unit icon is prevented from being repeated with the calculation order of another unit icon.

7. The process calculation method for a water treatment process according to any one of claims 1 to 6, characterized in that: In the step of determining the calculation order of the unit icons in the step A, when a calculation order has been set for a certain unit icon, the calculation order is prevented from being overwritten.

8. The process calculation method for a water treatment process according to any one of claims 1 to 7, characterized in that: The unit icon is at least one of the following: (1) Water flow: raw water, production water, and drainage; (2) Water treatment equipment: sedimentation separation, flotation separation, centrifugal separation, coagulation treatment, stirring treatment, aerobic treatment, anaerobic treatment, filtration, pressing, filter cloth, precision filtration membrane, ultrafiltration membrane, nanofiltration membrane, reverse osmosis membrane, promoted oxidation, ion exchange, adsorption, absorption, degassing, crystallization, distillation, heat exchange, and mineral addition; (3) Energy recovery device: reverse pump type, turbine type, pressure exchange type, turbocharger; (4) Liquid injection device; (5) Degassing device; (6) Equipment: pumps, blowers, compressors; (7) Piping connections: mixing and branching.

9. The process calculation method for a water treatment process according to any one of claims 1 to 8, characterized in that: When the water treatment process includes at least one raw water unit icon and at least one produced water unit icon or a drain unit icon, in the step of determining the calculation order of the unit icons in the step A, the step A includes the following steps A1 to A5: Step A1: Select one of the raw water unit icons, set the calculation order of the selected raw water unit icon to "1", then deselect the raw water unit icon, select a downstream unit icon via the outflow wiring from the raw water unit icon, and proceed to the following step A2. Step A2: For the calculation order of the unit icon selected in any of steps A1 and A4 and A5 described later, a value equal to the maximum value of the calculation order set for all the unit icons forming the water treatment process plus 1 is set, and the process proceeds to the following step A3. Step A3: If the unit icon selected in any of steps A1 and A4 or A5 described later is not the produced water unit icon or the drainage unit icon, the process proceeds to step A4 described below. If the unit icon selected in any of steps A1 and A4 or A5 described later is the produced water unit icon or the drainage unit icon, the unit icon is deselected and the process proceeds to step A5 described below. A4 step: cancel the selection of the unit icon selected in any of the steps A1, A4, and A5 described later, select a downstream unit icon through one of the outflow wirings flowing from the unit icon, and move to the A2 step. Process A5: When there is an unpassed outflow wiring flowing out of the unit icon whose calculation sequence has been determined in the water treatment process flow, the unit icon into which the outflow wiring flows is selected and the process moves to the A2 process. When there is no unpassed outflow wiring flowing out of the unit icon whose calculation sequence has been determined, the A process is terminated.

10. The process calculation method for a water treatment process according to any one of claims 1 to 9, characterized in that: In the case where the water treatment process has a circulating wiring, the following A6 step is provided after the A4 step, and in the A5 step, if there is an outflow wiring that does not pass from the unit icon whose calculation order has been determined, the unit icon into which the outflow wiring flows is selected and the process proceeds to the A6 step. Process A6: If the calculation order of the unit icons selected in any of the processes A1, A4, and A5 has been determined, it moves to the process A5; if the calculation order of the unit icons selected in any of the processes A1, A4, and A5 has not been determined, it moves to the process A2.

11. The process calculation method for a water treatment process according to any one of claims 1 to 10, characterized in that: When the water treatment process includes two or more raw water unit icons, the process includes the following step A7, which is performed when there is no unit icon whose calculation order is not determined downstream of one of the unit icons whose calculation order is determined in the step A5, and each of the steps A2, A3, A4, and A6 is targeted at the unit icon selected from any one of the steps A1, A4, A5, and A7. Step A7: If the raw water unit icon with the undetermined calculation order exists in the water treatment process flow, select the icon and proceed to step A2; if the raw water unit icon with the undetermined calculation order does not exist, end step A.

12. The process calculation method for a water treatment process according to any one of claims 1 to 11, characterized in that: In the process of determining whether the process B and the process C need to be repeatedly executed in the process D, it is determined that repetition is required until at least one or both of the following conditions are met: the error in the material balance of the water treatment process flow is below a predetermined specified value; and the difference between the estimated result of the process B of at least one of the production water unit icon and the drainage unit icon and the last estimated result is below a predetermined specified value.

13. A water treatment calculation program for performing process calculations for a water treatment process having a plurality of unit water treatment processes, wherein the program causes a computer to function as the following means with respect to a water treatment process stored in a water treatment process storage module, formed by arranging unit icons for the water treatment unit processes and a water treatment process input step for wiring between the unit icons: The unit of the water treatment process is read from the water treatment process storage unit for use in the following steps A to D. Step A: determining the calculation order of the unit icons based on the rules pre-stored in the unit icon calculation order determination rule storage unit, Step B: Calculate at least one of the flow rate, water quality, temperature, and water pressure of the treated water for each of the unit icons according to the calculation sequence. Step C: With respect to the water treatment process, adjusting at least one of the flow rate, water quality, temperature, and water pressure of the raw water or treated water calculated in step B so as to avoid any contradiction between the material balance or the energy balance. Step D: Determine whether it is necessary to repeat step B and step C. A unit that stores the water treatment process calculation result in the water treatment process calculation result storage unit for use in the water treatment process calculation result output step.

14. The water treatment calculation program according to claim 13, characterized in that Before or after the step of determining the calculation order of the unit icons in step A, the computer is also enabled to function as at least one of a unit for calculating the flow rate income and expenditure of the water treatment process and a unit for calculating the water quality income and expenditure of the water treatment process.

15. The water treatment calculation program according to claim 13 or 14, characterized in that: When the flow rate of the treated water is estimated in the step B, the step C adjusts the flow rate of the raw water or the treated water so that the error in the balance of substances for each of the cell icons becomes equal to or smaller than a predetermined value.

16. The water treatment calculation program according to any one of claims 13 to 15, characterized in that: The step B is a step of estimating at least one of the flow rate, water quality, temperature and water pressure of the treated water for each of the unit icons according to the calculation order. When the water treatment process includes a mixed unit icon with at least two inflow lines, and when the flow rate, water quality, temperature and water pressure of at least one of the inflow lines of the unit icon are determined by input or calculation, while any one of the flow rate, water quality, temperature and water pressure of at least one other inflow line is not determined, any one of the flow rate, water quality, temperature and water pressure of the inflow line whose flow rate, water quality, temperature and water pressure is determined is input to the inflow line whose flow rate, water quality, temperature and water pressure is not determined, to estimate at least one of the flow rate, water quality, temperature and water pressure of the treated water.

17. The water treatment calculation program according to any one of claims 13 to 16, characterized in that: In the step of determining the calculation order of the unit icons in step A, the wiring is arranged along the direction of the water treatment process, and step A determines the calculation order along the direction of the wiring, and determines the calculation order for all the unit icons that form the water treatment process flow without omission.

18. The water treatment calculation program according to any one of claims 13 to 17, characterized in that: The step of determining the calculation order of the unit icons in step A avoids the calculation order of a certain unit icon from being repeated with the calculation order of another unit icon.

19. The water treatment calculation program according to any one of claims 13 to 18, characterized in that: The step of determining the calculation order of the unit icons in step A avoids overwriting the calculation order when a calculation order is set for a certain unit icon.

20. The water treatment calculation program according to any one of claims 13 to 19, characterized in that: The unit icon is at least one of the following: (1) Water flow: raw water, production water, and drainage; (2) Water treatment equipment: sedimentation separation, flotation separation, centrifugal separation, coagulation treatment, stirring treatment, aerobic treatment, anaerobic treatment, filtration, pressing, filter cloth, precision filtration membrane, ultrafiltration membrane, nanofiltration membrane, reverse osmosis membrane, promoted oxidation, ion exchange, adsorption, absorption, degassing, crystallization, distillation, heat exchange, and mineral addition; (3) Energy recovery device: reverse pump type, turbine type, pressure exchange type, turbocharger; (4) Liquid injection device; (5) Degassing device; (6) Equipment: pumps, blowers, compressors; (7) Piping connections: mixing and branching.

21. The water treatment calculation program according to any one of claims 13 to 20, characterized in that: When the water treatment process includes at least one raw water unit icon and at least one produced water unit icon or a drain unit icon, the step of determining the calculation order of the unit icons in step A is composed of the following steps A1 to A5. Step A1: Select one of the raw water unit icons, set the calculation order of the selected raw water unit icon to "1", deselect the raw water unit icon, select a downstream unit icon through the outflow wiring from the raw water unit icon, and move to the following step A2. Step A2: For the calculation order of the unit icon selected in any of steps A1 and A4 and A5 described later, a value is set that is the maximum value of the calculation order set for all the unit icons forming the water treatment process plus 1, and the process proceeds to the following step A3. Step A3: If the unit icon selected in any of steps A1 and A4 or A5 described later is not the produced water unit icon or the drainage unit icon, the process proceeds to step A4 described below. If the unit icon selected in any of steps A1 and A4 or A5 described later is the produced water unit icon or the drainage unit icon, the unit icon is deselected and the process proceeds to step A5 described below. Step A4: cancel the selection of the unit icon selected in any of the steps A1, A4, and A5 described later, select a downstream unit icon through one of the outflow wirings flowing from the unit icon, and move to step A2. Step A5: If there is an unpassed outflow wiring flowing out of the unit icon whose calculation sequence has been determined in the water treatment process flow, select the unit icon into which the outflow wiring flows and move to the step A2. If there is no unpassed outflow wiring flowing out of the unit icon whose calculation sequence has been determined, end the step A.

22. The water treatment calculation program according to any one of claims 13 to 21, characterized in that: When the water treatment process has a circulating wiring, after step A4, the computer is further caused to function as the following step A6, and when there is an outflow wiring that does not pass from the unit icon whose calculation order has been determined, step A5 selects the unit icon to which the outflow wiring flows and moves to step A6. Step A6: If the calculation order of the unit icons selected in any of steps A1, A4, and A5 has been determined, move to step A5; if the calculation order of the unit icons selected in any of steps A1, A4, and A5 has not been determined, move to step A2.

23. The water treatment calculation program according to any one of claims 13 to 22, characterized in that: When the water treatment process includes two or more raw water unit icons, the computer is further caused to function as step A7, which is a step to be performed when there is no unit icon whose calculation order is not determined downstream of step A5, and each of steps A2, A3, A4, and A6 is targeted at the unit icon selected in any one of steps A1, A4, A5, and A7. Step A7: If there is a raw water unit icon with an undetermined calculation order in the water treatment process, select the icon and move to step A2; if there is no raw water unit icon with an undetermined calculation order, end step A.

24. The water treatment calculation program according to any one of claims 13 to 23, characterized in that: The step D is determined to need to repeat the step B and the step C until at least one or two of the following conditions are met: the error in the material balance of the water treatment process is below a predetermined specified value; and the difference between the estimated result of the step B of at least one of the production water unit icon and the drainage unit icon and the last estimated result is below a predetermined specified value. 25 . A computer-readable recording medium having recorded thereon the water treatment calculation program according to claim 13 .

26. A water treatment process calculation system, characterized in that: The recording medium according to claim 25 is a server, and the server can be accessed via a browser to perform calculations for a water treatment process.

Images