0001]The present invention, the performance evaluation method of the water treatment apparatus and a water treatment device.
BACKGROUND
[0002]Desalination and seawater, in the process water generated with the treatment of industrial wastewater, contains salt and other inorganic components. In discharging such treated water to the outside, to reduce the impact on the environment, the process of removing the components is performed. More specifically, in the desalination of sea water, to remove the salt and other minerals from the sea, the permeate as fresh water is obtained. Further, in the treatment of industrial waste water, by concentrating the salt or other inorganic substances, the waste water is volume reduction. Such processing performing unit, for example, RO membrane (Reverse Osmosis Membrane: reverse osmosis membrane) which were used are known in the art. RO membranes by use of the water to be treated is separated into permeated water and concentrated water containing the above components. Concentrate, permeate is processed in the apparatus either separately provided.
[0003]
　Incidentally, and when using such RO membranes for a long time, if the resulting density variation in the water to be treated, if the inorganic component contained in the impurity or impurities is crystallized, deposited as scale on the RO membrane surface there is. If the scale is precipitated, filtration area of the apparent of the RO membrane is reduced, it becomes impossible to maintain the desired performance. Therefore, a method for detecting the performance degradation of the RO membrane is desired.
　An example of such a technique is known one described in Patent Document 1. Desalination apparatus described in Patent Document 1, provided with a membrane separation unit, and the concentrated water supply line for extracting the concentrate from the membrane separation unit, and a monitoring separation film provided on the concentrated water supply line there. Based on the amount of precipitated scale in monitoring the separation membrane, the presence or absence of scale deposition is it can be determined in the membrane separation apparatus.
CITATION
Patent Document
[0004]
Patent Document 1: Japanese Patent No. 5398695
Summary of the Invention
Problems that the Invention is to Solve
[0005]
　Incidentally, in the actual membrane separation device, it is common that the vessel comprises a RO membrane is provided plural. Furthermore, in these vessels, depending on the nature of the production time of the state and materials, performance difference according to the individual (variation or the like of permeability of water) is known to occur. However, in the technique described in Patent Document 1, the performance difference between each such RO membranes is not considered. Therefore, in practice although there are RO membranes scale is precipitated may not be accurately detects this.
[0006]
　The present invention was made to solve the above problems, and an object thereof is to provide a more accurate performance evaluation method capable water treatment device to evaluate the performance, and the water treatment unit.
Means for Solving the Problems
[0007]
　Water Evaluation method of water treatment apparatus according to the first aspect of the present invention, which are arranged in parallel with each other, comprising a plurality of main vessel having a reverse osmosis membrane to separate the water to be treated and concentrated water and permeated water a performance evaluation method of the processor, corresponding to a concentration of a specific step, the concentrated water discharged from the target vessel to identify the most concentration rate is higher main vessel of the plurality of main vessels as the target vessel density deposition of scale in the detection target water having to include a detection step of detecting an indication of ease, the.
[0008]
　According to this method, in particular step, most concentration ratio among the plurality of main vessel has a higher primary vessel is identified as the target vessel. Here, the target vessel, it can be determined that is under load higher than the other main vessel. That is, among the plurality of main vessel, in this target vessel has become the most scale precipitates easily. In other words, the concentration of concentrated water is high.
　Therefore, in a subsequent detection step, detecting an index of the deposited ease of scale in the detection target water discharged from the target vessel.
　Thus, among the plurality of main vessel, to identify the most concentration rate is high (the most scale precipitates easily) main vessel (target vessel) to monitor an indication of scale deposits ease in the target vessel since, it is possible to detect the possibility of scale deposited in an early stage.
　In particular, even if there is a performance difference between a plurality of main vessel (variation in the concentration ratio), most scale that identifies the precipitated easily main vessel (target vessel), scale is deposited in the main vessel other than the target vessel the start timing can be easily foreseen.
[0009]
　According to a second aspect of the present invention, in the performance evaluation method of the water treatment apparatus according to the first aspect, the detection target water may be a concentrated water discharged from the target vessel.
[0010]
　According to this method, since the use directly concentrated water discharged from the target vessel as detected water, it is possible to foresee more readily deposition of scale.
[0011]
　According to a third aspect of the present invention, in the performance evaluation method of the water treatment apparatus according to the first embodiment, the discharged from a plurality of main vessel, the reconcentration step of reconcentrated mixed with concentrated water further wherein, the detection target water may be re-concentrated water obtained in 該再 concentration step.
[0012]
　According to this method, the concentrated water discharged from the plurality of main vessel is mixed once, it is possible to obtain a detected water easily by re-concentrating the concentrated water in reconcentration step.
[0013]
　According to a fourth aspect of the present invention, in the performance evaluation method of the water treatment apparatus according to the third aspect, the re-concentration step, the concentration of the re-retentate, when re-concentrating the concentrated water it may be adjusted by varying at least one of pressure and flow.
[0014]
　According to this method, only by changing at least one of pressure and flow rate at the time of re-concentrating the retentate, it is possible to adjust the concentration of easily and precisely reconcentration water.
[0015]
　According to a fifth aspect of the present invention, in the performance evaluation method of the water treatment apparatus according to the third aspect, the re-concentration step, the concentration of the re-retentate, when re-concentrating the concentrated water it may be adjusted by varying at least one of pressure and flow.
[0016]
　According to this method, the concentrated water from the reconcentrated Bessel (reconcentrated vessel) is provided independently, for example, as compared with the case of a subsequent detection step reconcentration the detection and at the same time, with higher accuracy it is possible to generate a re-concentrated water.
[0017]
　According to a sixth aspect of the present invention, in the performance evaluation method from the first fifth water treatment device according to any one aspect of, in the specifying step, the concentrate enriched in each of the main vessel flow rate, or may specify the target vessel based on the flow rate of the separated permeate in the main vessel.
[0018]
　According to this method, it is possible based on the flow rate of the concentrated water, to easily identify the target vessel.
[0019]
　According to a seventh aspect of the present invention, in the performance evaluation method of the first from the fifth water treatment device according to any one aspect of, in the specifying step, the concentrate enriched in each of the main vessel it may specify the target vessel based on the electrical conductivity.
[0020]
　According to this method, it is possible on the basis of the electrical conductivity of the concentrate, to easily identify the target vessel.
[0021]
　According to an eighth aspect of the present invention, in the performance evaluation method of the water treatment apparatus according to a seventh any one aspect from the first, the indicator may be a flow rate of the detected water.
[0022]
　According to this method, based on a change in the flow rate of the concentrated water as the detection target water, and the precipitated ease of scale it can be easily detected. For example, if the flow rate of the detected water is decreased, it is possible to detect the growing precipitated ease of scale.
[0023]
　According to a ninth aspect of the present invention, in the performance evaluation method of the water treatment apparatus according to a seventh any one aspect from the first, the indicator may be a density of the detection target water.
[0024]
　According to this method, based on the change in the density of concentrated water as the detection target water, and the precipitated ease of scale it can be easily detected. For example, when the density of the detected water is decreased, it is possible to detect the growing precipitated ease of scale.
[0025]
　According to a tenth aspect of the present invention, the water treatment device is arranged in parallel to each other, a plurality of main vessel having a reverse osmosis membrane to separate the water to be treated and concentrated water and permeated water, each of the main of vessel comprises most a selection unit concentration rate is selected as the target vessel a high primary vessel, and a detector for detecting an indication of precipitated ease of scale in the concentrated water discharged from the target vessel.
[0026]
　According to this configuration, it can be selected by selecting unit large main vessel of the most concentration ratio as a target vessel. Furthermore, since detecting the index of the deposited ease of scale in the concentrated water discharged from the target vessel, it is possible to detect a possibility that the scale is precipitated at an early stage.
　In particular, even if there is a performance difference between a plurality of main vessel (variation in the concentration ratio), most scale that identifies the precipitated easily main vessel (target vessel), scale is deposited in the main vessel other than the target vessel the start timing can be easily foreseen.
[0027]
　According to an eleventh aspect of the present invention, the water treatment device is arranged in parallel to each other, a plurality of main vessel having a reverse osmosis membrane to separate the water to be treated and concentrated water and permeated water, the plurality of is discharged from the main vessel, the mixed concentrated water out of the main vessel, to produce a concentrated again and re-concentrated water to a concentration corresponding to the concentration of concentrated water is most concentration rate is discharged from the high primary vessel comprising a reconcentration unit, and a detection unit that detects an index of the deposited ease of scale in the re-concentrated water, the reconcentration unit has a reverse osmosis membrane, reconcentrated to generate the re-concentrated water vessel and the by changing at least one of the supply pressure of the concentrated water, and the flow rate for the reconcentration vessel, having a first concentration adjusting unit for adjusting the concentration of the re-concentrated water.
[0028]
　According to this configuration, by adjusting the concentration of the re-concentrated water by the first concentration adjusting unit, it is possible to obtain a concentrated water having a concentration corresponding to the concentrated water of the target vessel easily. Furthermore, according to this configuration, as compared with a case where since the vessel to re-concentrate the retentate (reconcentrated vessel) is provided independently, for example, the detection and reconcentrated subsequent detection step simultaneously, higher it is possible to generate a re-concentrate in accuracy.
[0029]
　According to a twelfth aspect of the present invention, the water treatment device is arranged in parallel to each other, a plurality of main vessel having a reverse osmosis membrane to separate the water to be treated and concentrated water and permeated water, the plurality of after mixing the concentrated water discharged from the main vessel, thereby discharging the re-concentrated water and reconcentrated concentrated water that has been said mixture, to detect an index of the deposited ease of scale in 該再 concentrated water concentrated detector, said by varying at least one of pressure and flow rate of the concentrated water for concentration detection unit includes a second concentration adjusting unit for adjusting the concentration of the concentrated water.
[0030]
　According to this arrangement, the concentration detection unit, it is possible to perform the adjustment of the concentration of concentrated water, the index of the deposited ease of scale detection and at the same time. That is, by simplifying the structure of the apparatus, it is possible to reduce manufacturing costs, maintenance costs.
Effect of the invention
[0031]
　According to the present invention, it is possible to provide a more accurate performance evaluation method capable water treatment device to evaluate the performance, and the water treatment unit.
BRIEF DESCRIPTION OF THE DRAWINGS
[0032]
Is an overall view showing a water treatment apparatus according to the first embodiment of FIG. 1 the present invention.
FIG. 2 is a flowchart illustrating a method for evaluating performance of the water treatment apparatus according to a first embodiment of the present invention.
[3] is an overall view showing a modified example of the water treatment apparatus according to a first embodiment of the present invention.
Is an overall view showing a water treatment apparatus according to the second embodiment of FIG. 4 the present invention.
5 is a flowchart illustrating a method for evaluating performance of the water treatment apparatus according to a second embodiment of the present invention.
6 is an overall view showing a water treatment apparatus according to a third embodiment of the present invention.
7 is a flowchart illustrating a method for evaluating performance of the water treatment apparatus according to a third embodiment of the present invention.
8 is a diagram showing a specific example of the arrangement of a flow meter in each embodiment of the present invention.
It is a diagram showing a modified example of the water treatment apparatus according to the second embodiment of FIG. 9 present invention.
DESCRIPTION OF THE INVENTION
[0033]
First Embodiment
　For the first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the water treatment apparatus 100 according to this embodiment includes a water pump 1, a membrane separation unit 2, a selector 3, a detection unit 4, a.
[0034]
　The water treatment apparatus 100, to the treated water discharged from the other equipment (not shown) is a device for performing the desalting process. Or the treatment water derived from the upstream side by the water pump 1 is subjected to desalting treatment is performed in the membrane separation unit 2 is sent to the downstream side, it is stored in the storage facility (not shown), or external It is released to.
[0035]
　Water pump 1 is provided on the introduction line 5 for guiding the treated water from the other equipment (not shown). Downstream of the water pump 1 is provided with membrane separation unit 2. Membrane separation unit 2 is provided with a plurality of main vessel 2A. In FIG 1 illustrates the configuration including the four main vessel 2A. These four main vessel 2A are arranged in parallel with each other. That is, the treated water flowing through the inlet line 5 is distributed to the four towards the four main vessel 2A.
[0036]
　Each main vessel 2A is a reverse osmosis membrane to separate the water to be treated and concentrated water and permeated water (RO membrane: Reverse Osmosis Membrane) has a built-in. That is, for the reverse osmosis membrane, by passing through the treatment water containing impurities of salt such as concentrated water component containing the impurities are concentrated is generated. Ingredients except concentrated water out of the water to be treated (permeate) passes through the reverse osmosis membrane.
[0037]
　In addition, each main vessel 2A, the concentrated water line 6 to retrieve the concentrated water, the permeate line 7 for taking out the permeated water is provided. That is, in this embodiment, the concentrated water line 6 from four main vessel 2A one by 4, respectively, and the permeate line 7 extends. Ends of the four downstream of concentrated water line 6, both connected to the upstream end of the first collecting water line 8. Thus, the concentrated water that flows through the four above concentrated water line 6, after being mixed on the first collecting water line 8, flows toward the downstream side.
[0038]
　Similarly, the downstream end of the four permeate line 7 is connected to the upstream end of the second collecting water line 9. Thus, it permeated water that flows on the four permeate line 7, after being mixed on the second collecting water line 9, to flow toward the downstream side. Incidentally, on the respective permeate line 7, flow meter 10 is provided for measuring the flow rate of the permeate.
[0039]
　Further, on the four concentrated water line 6, the extraction line 11 for extracting a part of the concentrated water from the concentrated water line 6, respectively. On extraction line 11, switch valve 12 is provided one by one. If this on-off valve 12 is closed is not flow into the retentate to the extraction line 11. On the other hand, when the opening and closing valve 12 is opened, a part of the concentrated water flowing into the extraction line 11. Furthermore, the downstream end of the four extraction line 11 are both connected to the detection unit 4 (described later). That is, four on-off valve 12, among the four main vessel 2A, functions as a selection unit 3 for connection to the detection unit 4 by selecting any only one of the main vessel 2A as the target vessel .
[0040]
　Downstream of the extraction line 11 is detected Bessel 4A as a detecting portion 4 is provided. Detection vessel 4A, as in the main vessel 2A, has a reverse osmosis membrane therein. That is, the concentrated water introduced from the upstream side of the detection vessel 4A (concentrate water flowing in the extraction line 11), are separated again by the reverse separation membrane, and the secondary concentrated water, and a secondary permeate product It is. The secondary concentrated water, through reflux line 13, back into the first collecting water line 8 above. The secondary permeate is sent to an external storage equipment, etc. through the secondary permeate line 14. Incidentally, on this secondary permeate line 14, flow meter 15 for measuring the flow rate of the secondary permeate is provided.
[0041]
　Furthermore, in the present embodiment, on the first collecting water line 8 of the pressure regulating valve 16 is provided. In addition, between the detection vessel 4A and the extraction line 11, intermediate the pump 17 is provided. On reflux line 13, other pressure regulating valve 18 is provided. It is also possible to adopt a configuration without these pressure control valves 16, 18, and an intermediate pump 17 provided.
[0042]
　In the water treatment apparatus 100 as described above, firstly, that the water pump 1 is driven, the water to be treated is introduced into membrane separation unit 2 through inlet line 5. Each main vessel 2A in membrane separation unit 2, treated water is separated and concentrated water, in the permeate.
[0043]
　Here, device having a reverse osmosis membrane as the main vessel 2A above, the scale component concentration variation of the water to be treated, there is a case where impurities contained in water to be treated is deposited on the surface of the reverse osmosis membrane as scale . Furthermore, the apparatus having a reverse osmosis membrane, it is also known that there are individual differences in performance. That is, when used in a parallel arrangement a plurality of main vessel 2A, while a specific scale in the main vessel 2A is precipitated, that condition occurs that the scale in the other main vessel 2A has not been deposited is there.
[0044]
　Therefore, in this embodiment, by the selection unit 3 described above, the most scale identifies easily the main vessel 2A as a target vessel to precipitate, led only concentrated water discharged from the target vessel in the detection vessel 4A. In the detection vessel 4A, the presence or absence of scale deposition, and scales precipitation amount is detected. That is, when the scale on the detection vessel 4A is precipitated can be estimated that the scale in the same manner also on target vessel is precipitated.
[0045]
　Performance Evaluation of the water treatment apparatus 100 will be described in detail with reference to FIGS. To evaluate the performance of the water treatment apparatus 100, as shown in FIG. 2, first, to identify the most concentration rate is high primary vessel 2A of the plurality of main vessel 2A as a target vessel (specifying step S1). More specifically, based on the flow rate of the permeated water that is measured by the flow meter 10 provided on the permeate line 7, the target vessel is identified. Here, the main vessel 2A flow permeate largest, it can be determined that the most concentration factor higher. That is, here the flow rate of the permeate is the largest primary vessel 2A is identified as the target vessel.
[0046]
　Subsequently, by operating the on-off valve 12 serving as the selection unit 3 is connected only to the detection vessel 4A target vessel. In other words, the opening and closing valve 12 corresponding to the main vessel 2A other than the target vessel are both being closed. Thus, part of the concentrated water discharged from the target vessel (detected water) flows into the detection vessel 4A through sample line 11.
[0047]
　In the detection vessel 4A, as described above, the detection target water and it is separated secondary concentrated water and the secondary permeate is generated again. In the detection vessel 4A, an indication of the scale of the deposited ease in the detection subject water is detected (detection step S2). More specifically, the downstream side of the detection vessel 4A (i.e., secondary permeate line 14) by the flow meter 15 provided in the flow rate minimal change in the secondary permeate is measured. If the flow rate of the secondary permeate turned to decrease the scale is deposited in the detection vessel 4A, the reverse osmosis membrane is determined to have closed.
[0048]
　Also, when mounting the main vessel 2A is incomplete, it is possible to easily find this by the method of evaluation. In mounting an incomplete primary vessel 2A, also the flow rate of the permeate is increased by the occurrence of leakage.
[0049]
　As described above, in this performance evaluation method of the water treatment apparatus 100, in particular the step S1, the most concentrated high magnification main vessel 2A of the plurality of main vessel 2A is identified as the target vessel. Here, the target vessel, it can be determined that is under load higher than the other main vessel 2A. That is, among the plurality of main vessel 2A, in this target vessel has become the most scale precipitates easily.
[0050]
　Therefore, in a subsequent detection step S2, an indication of the scale of the deposited ease in the detection subject water discharged from the target vessel is detected.
[0051]
　Thus, among the plurality of main vessel 2A, to identify the most scale deposited easily main vessel 2A (target vessel), since monitoring the indication of the scale deposits ease in the target vessel, scale it is possible to detect the possibility of precipitation at an early stage.
[0052]
　Note that the configuration described above, and in the method, based on the measurement values ​​of the flow meter 10 provided on the permeate line 7, it was decided to identify the target vessel. However, configuration for identifying the target vessel, and the method is not limited to the above. As shown in FIG. 3, instead of the flow meter 10, the position on the downstream side of the opening and closing valve 12 on the extraction line 11 may be provided with a flow meter 10A for measuring the flow rate of the concentrated water. The flow meter 10A is used to detect changes in the concentration rate of the main vessel 2A connected to each extraction line 11. Furthermore, in order to detect changes in the concentration rate of the main vessel 2A, instead of measuring the flow rate of the by flowmeter 10A, it is also possible to use the electrical conductivity of the concentrate as an index. Such is also the configuration, it is possible to easily specify the target vessel. Note that by permanently installed flow meters 10A and electric conductivity meter of the flow rate, to the electric conductivity may be configured to always measure, may be configured to measure attached at any time in accordance with these devices required.
[0053]
　Furthermore, in the above configuration, as an indication of scale deposits ease of detection target water by the flow meter 15 provided on the secondary permeate line 14, with a flow rate of the secondary permeate. However, instead of the flow rate of the secondary permeate, it is also possible to use a density as an index of scale deposits ease. In this case, instead of the flow meter 15, it is desirable to provide a densitometer.
[0054]
[Second Embodiment]
　Next, a second embodiment of the present invention will be described with reference to FIGS. 4 and 5. The same symbols are given to the same components as the first embodiment described above, a detailed description thereof will be omitted. As shown in FIG. 4, the water treatment apparatus 200 according to this embodiment, the water pump 1, a membrane separation unit 22, and a re-concentration unit 23, a detection unit 4, a.
[0055]
　Membrane separation unit 22 includes a plurality of main vessel 22A arranged in parallel with each other. That is, the concentrated water produced in each of the main vessel 22A are mixed in the first collecting water line 8. Some of the concentrate water flowing in the first collecting water line 8, toward the downstream side reconcentrated unit 23. In the resulting permeate each main vessel 22A, after being mixed in the second collecting water line 9 and flows toward the reservoir facilities (not shown).
[0056]
　Reconcentration unit 23 is provided with a different reconcentrated vessel 23A, a first concentration adjusting unit 24, a and the main vessel 22A. Reconcentration vessel 23A is by reconcentration line 25 is connected to the first collecting water line 8. Reconcentration line 25 is a flow path for taking out part of the concentrated water flowing through the first condensing water line 8. Reconcentration vessel 23A, as in the main vessel 22A above, an apparatus having a reverse osmosis membrane. That is, the concentrated water supplied to reconcentration vessel 23A are separated again.
[0057]
　The first concentration adjusting unit 24 includes an intermediate pump 26, and a pressure regulating valve 27, the. Intermediate pump 26 is provided on the reconcentration line 25. By changing the discharge amount of the intermediate pump 26, the flow rate of the concentrated water flowing reconcentration line 25 above is adjusted. The pressure regulating valve 27 is provided and reconcentrated vessel 23A, the flow path between the detector 4. By varying the opening degree of the pressure regulating valve 27, the supply pressure of the water supplied to the reconcentrated vessel 23A is adjusted. That is, the opening degree of the discharge amount of the intermediate pump 26 and a pressure regulating valve 27 by varying the respective concentrations of the concentrated water discharged from the reconcentrated vessel 23A (reconcentrated water) is adjusted.
[0058]
　Further, on the downstream side of the reconcentrated vessel 23A, the detection vessel 28A as a detection unit 4 is provided. The detection vessel 28A, reconcentrated water discharged from the above reconcentrated vessel 23A is supplied. In other words, re-concentrated water introduced from the upstream side of the detection vessel 28A, the reverse isolation is again separated by a membrane, and a secondary concentrated water, and a secondary permeate is produced. The secondary concentrated water, through reflux line 13, back into the first collecting water line 8 above. (It should be noted that the secondary retentate recirculation line 13, without passing through the first collecting water line 8, can be configured to be recovered by another route.) Secondary permeate secondary permeate It is sent to an external storage equipment, etc. through a line 14. Incidentally, on this secondary permeate line 14, flow meter 15 for measuring the flow rate of the secondary permeate is provided.
[0059]
　In such water treatment apparatus 200 as described above, firstly, that the water pump 1 is driven, the water to be treated is introduced into membrane separation unit 22 via the inlet line 5. Each main vessel 22A in the membrane separation unit 22, the treatment water is separated and concentrated water, in the permeate.
[0060]
　Here, device having a reverse osmosis membrane as the main vessel 22A is extended use and, by such variations in the scale components concentration in the water to be treated, reverse osmosis as scale impurity or scale components contained in the water to be treated sometimes deposited on the surface of the membrane. Furthermore, the apparatus having a reverse osmosis membrane, it is also known that there are individual differences in performance. That is, when used in a parallel arrangement a plurality of main vessel 22A, while a specific scale in the main vessel 2A is precipitated, that condition occurs that the scale in the other main vessel 22A is not precipitated is there.
[0061]
　Therefore, in the present embodiment, based on the flow rate of the permeated water that is measured by the flow meter 10 described above, most scale precipitates easily main vessel 22A is identified as the target vessel. Furthermore, reconcentration unit 23 generates a detection target water with a concentration corresponding to the concentration of concentrated water discharged from the target vessel, and supplies a detection vessel 28A. In the detection vessel 28A, the presence or absence of scale deposition is detected. That is, when the scale on the detection vessel 28A is precipitated can be estimated that the scale in the same manner also on target vessel is precipitated.
[0062]
　Performance Evaluation of the water treatment apparatus 200 will be described in detail with reference to FIGS. To evaluate the performance of the water treatment apparatus 200, as shown in FIG. 5, first, to identify the most concentration rate is high primary vessel 22A of the plurality of main vessel 22A as a target vessel (specifying step S21). More specifically, based on the flow rate of the permeated water that is measured by the flow meter 10 provided on the permeate line 7, the target vessel is identified. Here, the main vessel 22A flow permeate largest, it can be determined that the most concentration factor higher. That is, here the flow rate of the permeate is the largest primary vessel 22A is identified as the target vessel.
[0063]
　In the present embodiment, the concentrated water discharged from the main vessel 22A is mixed on the first collecting water line 8. Therefore, the reconcentration vessel 23A, the detection target water having a substantially equal concentration concentrated water above the target vessel is generated. In other words, the reconcentration vessel 23A, to a comparable concentration and the target vessel, concentrated water is reconcentrated (reconcentration step S21B). Adjustment of such concentrations are performed by the first concentration adjusting unit 24 described above. That is, the discharge amount of the intermediate pump 26 and the opening degree of the pressure regulating valve 27 by varying the respective concentrations of the concentrated water discharged from the reconcentrated vessel 23A (reconcentrated water) is adjusted. Thus, the detection target water flows into the detection vessel 28A on the downstream side.
[0064]
　In the detection vessel 28A, the detection target water and it is separated secondary concentrated water and the secondary permeate is generated again. In the detecting vessel 28A, an indication of the scale of the deposited ease in the detection subject water is detected (detection step S22). More specifically, the downstream side of the detection vessel 28A (i.e., secondary permeate line 14) by the flow meter 15 provided in the flow rate minimal change in the secondary permeate is measured. If the flow rate of the secondary permeate turned to decrease the scale is deposited in the detection vessel 28A, the reverse osmosis membrane is determined to have closed.
[0065]
　As described above, in the performance evaluation method of the water treatment apparatus 200, in particular the step S1, the most concentrated high magnification main vessel 22A of the plurality of main vessel 22A is identified as the target vessel. Here, the target vessel, it can be determined that is under load higher than the other main vessel 22A. That is, among the plurality of main vessel 22A, in this target vessel has become the most scale precipitates easily.
[0066]
　Therefore, in a subsequent detection step S22, an indication of the scale of the deposited ease in the detection subject water discharged from the target vessel is detected.
[0067]
　Thus, among the plurality of main vessel 22A, to identify the most scale deposited easily main vessel 22A (target vessel), since monitoring the indication of the scale deposits ease in the target vessel, scale it is possible to detect the possibility of precipitation at an early stage.
[0068]
　Furthermore, according to the above-described configuration, in reconcentration step S21B, the concentration of the re-concentrated water is adjusted by the first concentration adjusting unit 24. That is, the concentration of the re-concentrated water is adjusted by changing the pressure when reconcentrated retentate. Thus, only by changing at least one of pressure and flow rate at the time of re-concentrating the retentate, it is possible to adjust the concentration of easily and precisely reconcentration water.
[0069]
　In addition, according to the above-described structure, when performing since the vessel to re-concentrate the retentate (reconcentrated vessel 23A) is provided independently, for example in a subsequent detection step S22 reconcentrated and detection at the same time compared to, it is possible to generate a re-concentrated water with higher accuracy.
[0070]
　Note that the configuration described above, and in the method, based on the measurement values ​​of the flow meter 10 provided on the permeate line 7, it was decided to identify the target vessel. However, configuration for identifying the target vessel, and the method is not limited to the above. Like the first embodiment, in place of the flow meter 10, the position on the downstream side of the opening and closing valve 12 on the extraction line 11 may be provided with a flow meter 10A for measuring the flow rate of the concentrated water. The flow meter 15 is used to detect changes in the concentration rate of the main vessel 2A connected to each extraction line 11. Furthermore, in order to detect changes in the concentration rate of the main vessel 2A, instead of measuring the flow rate of the by flowmeter 10A, it is also possible to use the electrical conductivity of the concentrate as an index. Such is also the configuration, it is possible to easily specify the target vessel.
[0071]
　Furthermore, in the above configuration, as an indication of scale deposits ease of detection target water by the flow meter 15 provided on the secondary permeate line 14, with a flow rate of the secondary permeate. However, instead of the flow rate of the secondary permeate, it is also possible to use a density as an index of scale deposits ease. In this case, instead of the flow meter 15, it is desirable to provide a densitometer.
[0072]
Third Embodiment
　Next, a third embodiment of the present invention will be described with reference to FIGS. 6 and 7. The same symbols are given to the same components as the respective embodiments described above, a detailed description thereof will be omitted. As shown in FIG. 6, the water treatment apparatus 300 according to this embodiment, the water pump 1, a membrane separation unit 32, and a detector 33, a second concentration adjusting unit 24B, the.
[0073]
　Membrane separation unit 32 includes a plurality of main vessel 32A arranged in parallel with each other. Concentrated water produced in each of the main vessel 32A are mixed in the first collecting water line 8. Some of the concentrate water flowing in the first collecting water line 8, flows toward the downstream side. In the resulting permeate each main vessel 32A, after being mixed in the second collecting water line 9 and flows toward the reservoir facilities (not shown).
[0074]
　Detector 33 includes a different concentration detection vessel 33A (concentration detector) and the main vessel 32A. Concentrated detection vessel 33A is a device having a reverse osmosis membrane. That is, concentrated water supplied to the concentrated detection vessel 33A are separated again. Concentrated detection vessel 33A is the detection line 34 is connected to the first collecting water line 8. Detection line 34 is a flow path for taking out part of the concentrated water flowing through the first condensing water line 8. The above concentration detection base Sseru 33A does not necessarily have the configuration of a vessel, as another example, it is conceivable configuration using compact RO membrane as a concentrate detector.
[0075]
　Second concentration adjusting unit 24B includes an intermediate pump 35, and a pressure regulating valve 36, the. Intermediate pump 35 is provided on the detection line 34. By changing the discharge amount of the intermediate pump 35, the flow rate of the concentrated water flowing on detection line 34 is adjusted. The pressure regulating valve 36, a concentrated detection vessel 33A, is provided on the flow path between the first collecting water line 8 (reflux line 13). By varying the degree of opening of the pressure regulating valve 36, the supply pressure of the concentrated water supplied to concentrate detection vessel 33A is adjusted. That is, the opening degree of the discharge amount of the intermediate pump 35 and the pressure regulating valve 36 by varying the respective concentrations of the concentrated water discharged from the concentrated detection vessel 33A is adjusted.
[0076]
　Concentrated water introduced from the upstream side relative to the concentration detector vessel 33A is separated again by reverse separation membrane, and the secondary concentrated water, and a secondary permeate is produced. The secondary concentrated water, through reflux line 13, back into the first collecting water line 8 above. The secondary permeate is sent to an external storage equipment, etc. through the secondary permeate line 14. Incidentally, on this secondary permeate line 14, flow meter 37 for measuring the flow rate of the secondary permeate is provided.
[0077]
　In the water treatment apparatus 300 as described above, firstly, that the water pump 1 is driven, the water to be treated is introduced into membrane separation unit 32 via the inlet line 5. Each main vessel 32A in the membrane separation unit 32, the treatment water is separated and concentrated water, in the permeate.
[0078]
　Here, device having a reverse osmosis membrane as the main vessel 32A, by being used over a long period of time, if precipitated and crystallized at the surface of the impurity, or scale components are reverse osmosis membrane contained in the water to be treated there is. Furthermore, the apparatus having a reverse osmosis membrane, it is also known that there are individual differences in performance. That is, when used in a parallel arrangement a plurality of main vessel 32A, while a specific scale in the main vessel 32A is precipitated, that condition occurs that the scale in the other main vessel 32A is not precipitated is there.
[0079]
　Therefore, in the present embodiment, based on the flow rate of the permeated water that is measured by the flow meter 10 described above, most scale precipitates easily main vessel 32A is identified as the target vessel. In concentrated detection vessel 33A, the concentration of the concentrated water, concentrated water is concentrated to a target vessel equivalent concentration (film interface concentration). At the same time, based on the flow rate of the permeated water that flows through the secondary permeate line 14, presence or absence of scale deposition, and scales precipitation amount is detected. That is, when the scale is deposited on the concentration detection vessel 33A may estimate that the scale in the same manner also on target vessel is precipitated.
[0080]
　Performance Evaluation of the water treatment apparatus 300 will be described in detail with reference to FIGS. To evaluate the performance of the water treatment apparatus 300, as shown in FIG. 6, firstly, to identify the most concentration rate is high primary vessel 32A of the plurality of main vessel 32A as a target vessel (specifying step S31). More specifically, based on the flow rate of the permeated water that is measured by the flow meter 10 provided on the permeate line 7, the target vessel is identified. Here, the main vessel 32A flow permeate largest, it can be determined that the most concentration factor higher. That is, here the flow rate of the permeate is the largest primary vessel 32A is identified as the target vessel.
[0081]
　In the present embodiment, the concentrated water discharged from the main vessel 32A is mixed on the first collecting water line 8. Thus, the concentration detection vessel 33A, the target vessel equivalent membrane surface concentration of the. That is, the detection target water having a substantially equal concentration concentrated water above the target vessel is generated. In other words, the concentration detection vessel 33A, to a comparable concentration and the target vessel, concentrated water is reconcentrated (reconcentration step S31B). Accordingly, film surface concentration in the reverse osmosis membrane surface during concentration detection vessel 33A becomes the target vessel equivalent concentrations. Adjustment of such concentrations is carried out by the second concentration adjusting section 24B of the above. That is, the discharge amount of the intermediate pump 35 and the opening degree of the pressure regulating valve 36 by varying the respective concentrations of the concentrated water discharged from the concentrated detection vessel 33A is adjusted.
[0082]
　Further, the concentration detection vessel 33A, the detection target water and is separated secondary concentrated water and the secondary permeate is generated again. In concentrated detection vessel 33A, an indication of the scale of the deposited ease in the detection subject water is detected (detection step S32). More specifically, the downstream side of the concentration detection vessel 33A (i.e., secondary permeate line 14) by the flow meter 37 provided in the flow rate minimal change in the secondary permeate is measured. If the flow rate of the secondary permeate turned to decrease the scale is precipitated in concentrated detection vessel 33A, the reverse osmosis membrane is determined to have closed.
[0083]
　Here, as a particular concentration detection unit, when using a small RO membrane, the scale in the concentration detection vessel 33A is deposited, it is estimated that the scale deposition occurs as well in the target vessel.
[0084]
　As described above, in the performance evaluation method of the water treatment apparatus 300, in particular the step S31, the most concentrated high magnification main vessel 32A of the plurality of main vessel 32A is identified as the target vessel. Here, the target vessel, it can be determined that is under load higher than the other main vessel 32A. That is, among the plurality of main vessel 32A, in this target vessel has become the most scale precipitates easily.
[0085]
　Thus, among the plurality of main vessel 32A, to identify the most scale deposited easily main vessel 32A (target vessel), since monitoring the indication of the scale deposits ease in the target vessel, scale it is possible to detect the possibility of precipitation at an early stage.
[0086]
　Furthermore, according to this configuration, by concentration detection vessel 33A, it is possible to perform the adjustment of the concentration of concentrated water, the index of the deposited ease of scale detection and at the same time. That is, by simplifying the structure of the apparatus, it is possible to reduce manufacturing costs, maintenance costs.
[0087]
　Note that the configuration described above, and in the method, based on the measurement values ​​of the flow meter 10 provided on the permeate line 7, it was decided to identify the target vessel. However, configuration for identifying the target vessel, and the method is not limited to the above. As shown in FIG. 3, instead of the flow meter 10, the position on the downstream side of the opening and closing valve 12 on the extraction line 11 may be provided with a flow meter 10A for measuring the flow rate of the concentrated water. The flow meter 10A is used to detect changes in the concentration rate of the main vessel 2A connected to each extraction line 11. Furthermore, in order to detect changes in the concentration rate of the main vessel 2A, instead of measuring the flow rate of the by flowmeter 10A, it is also possible to use the electrical conductivity of the concentrate as an index. Such is also the configuration, it is possible to easily specify the target vessel.
[0088]
　Furthermore, in the above configuration, as an indication of scale deposits ease of detection target water by the flow meter 37 provided on the secondary permeate line 14, with a flow rate of the secondary permeate. However, instead of the flow rate of the secondary permeate, it is also possible to use a density as an index of scale deposits ease. In this case, instead of the flow meter 37, it is desirable to provide a densitometer.
[0089]
　While the embodiments of the present invention has been described with reference to the drawings. The structure of the is only one example, it is possible to apply various modifications thereto.
　For example, in the embodiments described above, membrane separation unit 2 (membrane separation unit 22, the membrane separation unit 32) is described the example in which each has four main vessel 2A (main vessel 22A, the main vessel 32A). However, the main vessel 2A (main vessel 22A, the main vessel 32A) number of is not limited to four, and may be two, may be five or more.
[0090]
　Further, in the above embodiments, the configuration of the flow meter 10 provided on the permeate line 7, can be considered an example shown in FIG. 8, for example. 8, the water treatment apparatus 400, which is seen from the direction of extension of the main vessel V formed in each rod-shaped.
[0091]
　As shown in FIG. 8, a main vessel V1, V2, V3, respectively from V4 permeate line 7 of a plurality (four) extends one. These permeate line 7 is joined to the second collecting water line 9. Second Vol water line 9 extends vertically. In this second collecting water line 9, permeate flows from the top to the bottom.
[0092]
　Of the four main vessel V, a main vessel V1 and the main vessel V2, are arranged on both sides of the second collecting water line 9. Similarly, the main vessel V3 to the main vessel V4, are arranged on both sides of the second collecting water line 9.
[0093]
　Furthermore, the exit of the permeate water line 72 extending from the main vessel V2 is arranged below the outlet of the permeate water line 71 extending from the main vessel V1. Similarly, the outlet of the permeate water line 74 extending from the main vessel V4 is arranged below the outlet of the permeate water line 73 extending from the main vessel V3. In other words, the four outlet permeate lines 71, 72, 73, 74 are arranged sequentially downward from either upwards along the second collecting water line 9.
[0094]
　Upper second collecting water line 9 (i.e., above the outlet of the permeate line 71), the flow meter 10 is provided. As the specific embodiment of the flow meter 10, for example, a laser Doppler flow meter is suitable.
[0095]
　With the above construction, the flow rate distribution of the permeated water that is measured on a second collecting water line 9, toward the top to the bottom, as shown by the solid line in the graph of FIG. 8, step increase trend It is shown.
[0096]
　On the other hand, between the main vessel V1, V2, V3, V4, if the flow rate of the permeated water is variation (i.e., if there is a main vessel V1, V2, V3, V4 Baratsuki concentration factor of) the above flow rate the distribution, this variation is reflected. Specifically, as shown by the broken line in the graph in the graph of FIG. 8, the value of the flow rate shows a sharp increase in part of the main vessel V. The main vessel V shown this increase is identified as the target vessel in the above embodiments. According to the above configuration, it is possible to easily determine the target vessel.
[0097]
　Instead of the flow meter 10 as described above, it is also possible to use the TDS meter. More specifically, the permeate line 71, 72, 73 and 74 respectively of the exit, is conceivable manner to provide a TDS meter. TDS The (Total Disolved Solid), carbonates in the transmission water, bicarbonate, chloride, is an index indicating the concentration of the substance sulfate, calcium, magnesium, sodium, organic ions. TDS meter, the direct, an instrument that measures the conductivity of the current in the permeate. TDS meter, expressed by replacing the conductivity of the measured current in ppm is the concentration unit of electrolytes.
[0098]
　Further, as a modification of the second embodiment described above, it is also possible to adopt a configuration as shown in FIG. In the configuration of FIG, between on the connection line 29 connecting the reconcentration unit 23 (reconcentrated vessel 23A) and the detection section 4 (Detection vessel 28A), a pressure regulating valve 30, and pump 31 is provided. Further, a region between these pressure regulating valve 30 and the pump 31, the intermediate return line 13B connecting the first collecting water line 8 is provided. In addition, the flow meter 15 to permeate water line on discharged from reconcentrated vessel 23A is provided. Even with such a configuration, it is possible to obtain the same effect as the second embodiment.
Industrial Applicability
[0099]
　According to the above configuration, it is possible to provide a more accurate performance evaluation method capable water treatment device to evaluate the performance, and the water treatment unit.
DESCRIPTION OF SYMBOLS
[0100]
100, 200, 300 ... water treatment device 1 ... water pump 2 ... membrane separation unit 3 ... selector 4 ... detector 5 ... introduction line 2A ... main vessel 6 ... concentrated water line 7 ... permeate line 8 ... First Vol water line 9 ... second Vol water line 10 ... flow meter 11 ... extraction line 12 ... off valve 4A ... detection vessel 13 ... return line 13B ... intermediate reflux line 14 ... secondary permeate line 15 ... flow meter 16 ... pressure regulating valve 17 ... intermediate pump 18 ... pressure control valve S1, S21, S31 ... specifying step S2, S22, S32 ... detection step S21B, S31B ... reconcentrated step 10A ... flow meter 22 ... membrane separation unit 23 ... reconcentrated portion 22A ... main vessel 23A ... reconcentrated vessel 24 ... first concentration adjusting unit 25 ... reconcentrated line 26 ... intermediate pump 27 ... pressure control valve 28A ... detecting Bessel 29 ... connected La Down 30 ... pressure control valve 31 ... pump 32 ... membrane separation unit 33 ... detector 32A ... main vessel 33A ... concentrated detection vessel 34 ... detection line 35 ... intermediate pump 36 ... pressure control valve 37 ... flow meter V, V1, V2, V3 ... main vessel

WE CLAIM

Are arranged in parallel with each other, a performance evaluation method of the water treatment apparatus having a plurality of main vessel having a reverse osmosis membrane to separate the water to be treated and concentrated water and permeated water,
　most of the plurality of main vessel a specifying step of specifying the concentration rate is high primary vessel as a target vessel,
　detection that detects an index of the deposited ease of scale in the detection target water with a concentration corresponding to the concentration of the concentrated water discharged from the target vessel a step,
the performance evaluation method of the water treatment apparatus comprising a.
[Requested item 2]
　The detection target water performance evaluation method of the water treatment apparatus according to claim 1, wherein the concentrated water discharged from the target vessel.
[Requested item 3]
　Discharged from the plurality of main vessel, further comprising a reconcentration step of reconcentrated mixed concentrated water,
　the detection target water according to claim 1 which is re-concentrated water obtained in該再concentration step performance evaluation method of water treatment equipment.
[Requested item 4]
　And in the re-concentration step, the concentration of the re-concentrated water, the performance evaluation method of the water treatment apparatus of claim 3 which is adjusted by varying at least one of pressure and flow rate at the time of re-concentrating the concentrated water .
[Requested item 5]
　And in the re-concentration step, the concentration of the re-concentrated water, the performance evaluation method of the water treatment apparatus of claim 3 which is adjusted by varying at least one of pressure and flow rate at the time of re-concentrating the concentrated water .
[Requested item 6]
　Wherein in the specifying step, the flow rate of the concentrated water that has been enriched in each of the main vessel, or any one of claims 1 to 5, specifying the target vessel based on the flow rate of the separated permeate in the main vessel evaluation method of water treatment apparatus according to.
[Requested item 7]
　Wherein in the specifying step, the performance evaluation method of the water treatment apparatus according to claim 1, any one of 5 to identify the target vessel based on the electrical conductivity of the concentrated water that has been enriched in each of the main vessel.
[Requested item 8]
　The index is, the performance evaluation method of the water treatment device according to any one of claims 1 to 7 which is a flow rate of the detected water.
[Requested item 9]
　The index is, the performance evaluation method of the water treatment device according to any one of claims 1 7 is the density of the detection target water.
[Requested item 10]
　Are arranged in parallel to each other, the water to be treated and a plurality of main vessel having a reverse osmosis membrane to separate the concentrated water and permeated water,
　selection of each of the main vessel, the most concentrated high magnification main vessel as a target vessel a selection unit for,
　a detection unit for detecting an index of the deposited ease of scale in the concentrated water discharged from the target vessel
water treatment apparatus comprising a.
[Requested item 11]
　Are arranged in parallel with each other, a plurality of main vessel having a reverse osmosis membrane to separate the water to be treated and concentrated water and permeated water,
　discharged from the plurality of main vessel, mixed with concentrated water, of the main vessel among the most concentration ratio is higher from the main vessel to a concentration corresponding to the concentration of concentrated water discharged and reconcentrated unit for generating a re-concentrated water and reconcentrated,
　the scale of the deposited ease in reconcentration water a detector for detecting the indicator,
provided with,
　the reconcentration unit
　has a reverse osmosis membrane, wherein the reconcentration vessel for generating a re-concentrated water,
　the supply pressure of the concentrated water to said reconcentration vessel, and the flow rate at least one of them by changing, a first concentration adjusting unit for adjusting the concentration of the re-concentrated water of the
water treatment apparatus having a.
[Requested item 12]
　Are arranged in parallel with each other, a plurality of main vessel having a reverse osmosis membrane to separate the water to be treated and concentrated water and permeated water,
　after mixing the concentrated water discharged from the plurality of main vessel, the mixture and thereby discharging the reconcentrated and re-concentrated water concentrated water, and concentrated detection vessel for detecting an index of the deposited ease of scale in該再concentrated water,
　the pressure and flow rate of the concentrated water to said concentrate detection vessel by changing at least one, a second concentration adjusting unit for adjusting the concentration of the concentrated water,
comprising a water treatment unit.