WO2020071507A1 - 水質プロファイルの作成方法、分離膜モジュールの検査方法及び水処理装置 - Google Patents
水質プロファイルの作成方法、分離膜モジュールの検査方法及び水処理装置Info
- Publication number
- WO2020071507A1 WO2020071507A1 PCT/JP2019/039196 JP2019039196W WO2020071507A1 WO 2020071507 A1 WO2020071507 A1 WO 2020071507A1 JP 2019039196 W JP2019039196 W JP 2019039196W WO 2020071507 A1 WO2020071507 A1 WO 2020071507A1
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- Prior art keywords
- water
- separation membrane
- permeated
- membrane module
- treated
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 255
- 239000012528 membrane Substances 0.000 title claims abstract description 149
- 238000000926 separation method Methods 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000012466 permeate Substances 0.000 claims abstract description 23
- 238000010586 diagram Methods 0.000 claims abstract description 10
- 230000005856 abnormality Effects 0.000 claims description 53
- 239000003643 water by type Substances 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 10
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- 238000002835 absorbance Methods 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 239000000941 radioactive substance Substances 0.000 claims 1
- 238000001223 reverse osmosis Methods 0.000 description 19
- 238000007689 inspection Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000108 ultra-filtration Methods 0.000 description 4
- 239000012510 hollow fiber Substances 0.000 description 3
- 239000003550 marker Substances 0.000 description 3
- 238000001471 micro-filtration Methods 0.000 description 3
- 238000001728 nano-filtration Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
- B01D65/104—Detection of leaks in membrane apparatus or modules
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/16—Flow or flux control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/24—Quality control
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/05—Conductivity or salinity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
Definitions
- the present invention relates to a method for creating a water quality profile, a method for inspecting a separation membrane module, and a water treatment apparatus.
- Patent Documents 1 and 2 As a method for detecting the occurrence of an abnormality in the separation membrane module, a method of monitoring a state of the separation membrane element by installing a wireless tag (RFID tag), a sensor, or the like on the separation membrane element provided in the separation membrane module is known.
- RFID tag wireless tag
- Patent Documents 1 and 2 a method of monitoring a state of the separation membrane element by installing a wireless tag (RFID tag), a sensor, or the like on the separation membrane element provided in the separation membrane module is known.
- the present invention provides a method of creating a water quality profile that can extremely easily and quickly detect the occurrence of an abnormality in a separation membrane module and specify the degree of the abnormality and the position where the abnormality has occurred with high accuracy.
- the purpose is to do.
- the present invention provides (1) supplying treated water to a separation membrane module having a treated water supply port and a plurality of permeated water outlets to obtain permeated water; (2) changing the ratio of the flow rates of the respective permeated waters flowing out of the plurality of permeated water outlets, and (3) measuring the quality of the respective permeated waters after the step 2; Step 3 and (4) plotting the relationship between the ratio of the flow rate of each of the permeated water changed in step 2 and the water quality of each of the permeated water measured in step 3 as a scatter diagram. And a step 4 of repeating the above steps 2 to 4 a plurality of times.
- the present invention it is possible to detect the occurrence of an abnormality in the separation membrane module very simply and quickly with high accuracy, including its degree and position. Accordingly, it is possible to take an early countermeasure against abnormalities, so that the maintenance work of the water treatment apparatus can be made extremely efficient.
- FIG. 1 is a schematic flow chart showing an example of the configuration of a water treatment apparatus for realizing the inspection method for a separation membrane module of the present invention.
- FIG. 2 is a schematic diagram of the inside of the separation membrane module 4 in FIG. 1 observed from a direction perpendicular to the longitudinal direction of the separation membrane module 4.
- FIGS. 3A and 3B are examples of a water quality profile created by the method for creating a water quality profile of the present invention.
- FIG. 4 is a schematic flowchart showing another example of the configuration of the water treatment apparatus for realizing the separation membrane module inspection method of the present invention.
- the method for inspecting a separation membrane module includes: (1) supplying treated water to a separation membrane module having a treated water supply port and a plurality of permeated water outlets to obtain permeated water. Step 1, and (2) changing the ratio of the flow rate of each of the permeated water flowing out from the plurality of permeated water outlets. Step 2 and (3) After the step 2, the water quality of each of the permeated water is changed. Measuring 3).
- a water treatment apparatus for realizing such a method for inspecting a separation membrane module includes a separation membrane module having a treated water supply port, a plurality of permeate outlets, and the plurality of Independently changing the flow rate of each permeated water flowing out from the permeated water outlet, a flow rate adjusting means, and measuring the quality of each permeated water flowing out from the plurality of permeated water outlets, the water quality measuring means, Detecting means for detecting the presence or absence of an abnormality in the separation membrane module, the degree of the abnormality, or the position where the abnormality occurs, based on the relationship between the change in the flow rate of the permeated water and the quality of the respective permeated water. It is necessary.
- FIG. 1 shows an example of a configuration of a water treatment apparatus for realizing such a method for inspecting a separation membrane module according to one embodiment of the present invention.
- the separation membrane module 4 has a treated water supply port 5 and two, ie, a plurality of permeated water outlets, a first permeated water outlet 6 and a second permeated water outlet 8.
- To-be-treated water is supplied to the separation membrane module 4 at a predetermined flow rate by the high-pressure pump 1 via the to-be-treated water supply pipe 2.
- the pressure of the water to be supplied to the separation membrane module 4 is measured by a pressure gauge 3 installed in the water supply pipe 2.
- Examples of the water to be supplied to the separation membrane module include seawater, river water, groundwater, and sewage treated water.
- the water to be treated is seawater, the change in water quality between the permeated water and the permeated water is remarkable. Therefore, according to the separation membrane module inspection method of one embodiment of the present invention, the abnormality of the separation membrane module is determined. It can be detected more easily.
- the “separation membrane module” refers to a device including one or more separation membrane elements and a pressure vessel containing the separation membrane elements.
- the separation membrane module in addition to the separation membrane and the like provided in the separation membrane element, an abnormality is likely to occur in a connection portion between the separation membrane elements (for example, a connector described later). Therefore, the method for inspecting a separation membrane module according to one embodiment of the present invention can suitably exert its effects when applied to a separation membrane module including a plurality of separation membrane elements.
- separation membrane element refers to a separation membrane formed in a water treatment process in which water to be treated is subjected to membrane filtration through a separation membrane to obtain permeated water.
- the separation membrane provided in the separation membrane element is a membrane that filters the water to be treated using a pressure difference between both surfaces of the membrane and captures a substance exceeding a certain particle size contained in the water to be treated.
- a reverse osmosis membrane a nanofiltration membrane, an ultrafiltration membrane, a microfiltration membrane, a dynamic filtration membrane, or the like can be used.
- the inspection method of the separation membrane module according to one embodiment of the present invention has a high processing performance, and when an abnormality occurs, the processing performance is significantly affected.
- the reverse osmosis membrane, the nanofiltration membrane, and the ultrafiltration membrane Alternatively, in a case where the present invention is applied to a separation membrane module having a microfiltration membrane, the effect can be suitably exerted. Further, since a slight abnormality can be detected very easily due to a change in the quality of the permeated water, the effect can be particularly suitably exerted in application to a separation membrane module having a reverse osmosis membrane.
- Examples of the shape of the separation membrane include a flat membrane and a hollow fiber membrane.
- a flat membrane for example, a spiral separation membrane element in which a central membrane is surrounded by a flat membrane separation membrane is exemplified.
- a separation membrane element provided with the hollow fiber membrane for example, a separation membrane element in which a bundle of hollow fiber membranes is filled in a cylindrical case is given.
- the treated water supply port and the concentrated water outlet are provided so as to face each other at both ends in the longitudinal direction of the pressure vessel and the reverse osmosis membrane element, the treated water flows in the longitudinal direction of the separation membrane module, The water is treated from the water supply port side (upstream side) to the opposite side (downstream side) of the water supply port.
- the quality of the permeated water deteriorates downstream of the position where the abnormality occurs.
- a plurality of permeate outlets are provided in the separation membrane module.
- outlets of permeated water are generally provided at both ends in the longitudinal direction of the pressure vessel.
- a plurality of permeated water outlets are provided. Can be said to be arranged so that the position in the longitudinal direction of the separation membrane module is different.
- the flow rate of the permeated water flowing out of the first permeated water outlet 6 and the second permeated water outlet 8 to the first permeated water pipe 9 and the second permeated water pipe 13 is a first flow rate, which is an example of a flow rate adjusting means. It can be changed independently by the regulating valve 10 and the second flow regulating valve 14.
- the amount of each permeated water flowing out to the first permeated water pipe 9 and the second permeated water pipe 13 is measured by the first flow meter 11 and the second flow meter 15, and the quality of each permeated water is It is measured by the first water quality meter 12 and the second water quality meter 16.
- the first flow control valve 10 and the second flow control valve 14 may be either manual valves or automatic control valves, but are preferably automatic control valves in order to control the flow rate with high accuracy.
- Examples of the valve body include a globe valve, a butterfly valve, and a ball valve.
- the supply flow rate of the water to be treated can be controlled by changing the rotation speed of the high-pressure pump 1 by an inverter provided in the high-pressure pump 1.
- the water quality measured by the first water quality meter 12 and the second water quality meter 16 is easily measured online, electric conductivity, specific resistance, concentration of evaporation residue, salt concentration, boron concentration, ultraviolet absorbance, radioactivity It is preferably an index selected from the group consisting of substance concentration and turbidity. It is more preferable that the electric conductivity of the reverse osmosis membrane element and the turbidity of the ultrafiltration membrane element serve as indices, respectively, because the abnormality can be easily detected.
- FIG. 2 is a schematic view when the inside of the separation membrane module 4 in FIG. 1 is observed from a direction perpendicular to the longitudinal direction of the separation membrane module 4.
- the pressure vessel 17 provided in the separation membrane module 4 contains a total of four spiral reverse osmosis membrane elements 18 (18a, 18b, 18c, 18d), and the respective central tubes are connected to connectors 19 (19a, 19b, 19c). ), And are arranged in series in the longitudinal direction of the separation membrane module 4.
- the treated water supply port 5, the concentrated water outlet 7, the first permeated water outlet 6, and the second permeated water outlet 8 are all end plates 20 located at both ends in the longitudinal direction of the separation membrane module 4. Although provided on the end plate 21, these positions are not limited to this mode.
- the water to be treated is supplied from the treated water supply port 5 to the reverse osmosis membrane element 18 a via the treated water supply pipe 2.
- the concentrated water treated by the reverse osmosis membrane element 18a is sequentially supplied to the adjacent reverse osmosis membrane elements 18b, 18c and 18d, and after being treated, is finally discharged from the concentrated water outlet 7.
- the above steps 2 and 3 are repeated a plurality of times, and the result is used to detect the presence or absence of an abnormality, the degree of the abnormality, or the position where the abnormality occurs in the separation membrane module. It is characterized by doing.
- the water treatment apparatus for realizing such a method for inspecting a separation membrane module is configured such that the change in the flow rate of each of the permeated water and the relationship between the quality of each of the permeated water and It is necessary to provide a detection unit that detects the presence or absence of an abnormality in the separation membrane module, the degree of the abnormality, or the position where the abnormality occurs.
- the method for creating a water quality profile includes the following steps: (1) supplying treated water to a separation membrane module having a treated water supply port and a plurality of permeated water outlets; Step 1, and (2) changing the ratio of the flow rate of each of the permeated water flowing out from the plurality of permeated water outlets. Step 2 and (3) After the step 2, the quality of each of the permeated water. And (4) the relationship between the ratio of the flow rate of each of the permeated water changed in step 2 and the quality of each of the permeated water measured in step 3 is as follows: And step 4 for plotting as a scatter diagram, wherein steps 2 to 4 are repeated a plurality of times.
- the number of repetitions of the above steps 2 to 4 is not particularly limited. However, in order to increase the number of plots in the scatter diagram and detect the presence / absence of the abnormality in the separation membrane module, the degree of the abnormality, or the position of the occurrence of the abnormality more accurately, Preferably, it is large.
- the sum of the flow rate of the water to be treated supplied to the separation membrane module and the flow rate of each permeated water in the above steps 1 to 4 is It is preferably constant.
- the method for creating a water quality profile includes: (1) supplying water to be treated at a flow rate Q1 to a separation membrane module having a water to be treated supply port and a plurality of permeate outlets; Step 1 of obtaining permeated water; and (2) changing the flow rate ratio of each permeated water while maintaining the flow rate Q1 and the total flow rate Q2 of each permeated water flowing out from the plurality of permeation ports.
- the flow rate Q1 of the water to be treated and the total flow rate Q2 of the respective permeated waters are preferably maintained within a variation of 10% or less, more preferably constant. However, even when the to-be-treated water flow rate Q1 and the total flow rate Q2 of the respective permeated waters change by 10% or more, the water quality profile of one embodiment of the present invention can be created by correcting the influence of the flow velocity. .
- FIG. 3 is an example of a water quality profile created by the method for creating a water quality profile according to one embodiment of the present invention.
- the water quality profiles shown in FIG. 3 (a) and FIG. 3 (b) show that the one reverse osmosis membrane element is housed in the pressure vessel and the separation membrane module having two permeate outlets.
- the axis represents the change in the ratio of the flow rates of the respective permeated waters (hereinafter, referred to as “first permeated water” and “second permeated water”) flowing out of the first permeated water outlet and the second permeated water outlet, respectively. It shows the change in the quality of the permeated water of each of the first permeated water and the second permeated water.
- the horizontal axis represents the ratio (%) of the first permeated water to the total flow rate of the first permeated water and the second permeated water
- the vertical axis represents one of the indices of the quality of the permeated water. Is expressed for each of the first permeated water and the second permeated water.
- the water quality profile shown in FIG. 3 (a) is for a so-called normal state separation membrane module in which no abnormality has occurred.
- a treated water supply port and a concentrated water outlet are provided at opposite ends of the pressure vessel and the reverse osmosis membrane element in the longitudinal direction.
- a first permeated water outlet is provided on the same side as the treated water supply port, and a second permeated water outlet is provided on the opposite side.
- the salt concentration of the water to be treated on the side of the water supply port (upstream side) is lower, and the salt concentration of the water to be treated on the opposite side (downstream side) of the water supply port is. Will be higher. Since the desalting rate of the reverse osmosis membrane element is constant, the salt concentration of the permeated water increases as the salt concentration of the water to be treated increases. As a result, the salt concentration of the second permeated water is higher than that of the first permeated water. Therefore, when the ratio of the first permeated water is increased, the downstream permeated water is more included in the first permeated water, and the salt concentration of the first permeated water gradually increases. On the other hand, since the second permeated water does not include more upstream permeated water, the salt concentration of the second permeated water also gradually increases.
- the water quality profile shown in FIG. 3 (b) is for a separation membrane module in which an abnormality has occurred near the center in the longitudinal direction of the reverse osmosis membrane element, and the water to be treated has partially leaked to the permeated water side.
- a treated water supply port and a concentrated water outlet are provided at both ends in the longitudinal direction of the pressure vessel and the reverse osmosis membrane element so as to face each other.
- a treated water supply port is provided in the separation membrane module.
- a first permeate outlet is provided on the same side as, and a second permeate outlet is provided on the opposite side.
- the plots of the salinity of the first permeated water and the second permeated water are not curves that gradually rise, and the leaked water to be treated is included in the first permeated water.
- An inflection point occurs between the permeated water ratio and the permeated water ratio when the leaked water to be treated is included on the second permeated water side. The same inflection point occurs not only in the case where the treated water is partially leaked to the permeated water side but also when the treatment performance is deteriorated due to deterioration of the separation membrane or the like.
- the separation membrane module it is possible to detect the presence or absence of an abnormality in the separation membrane module by creating a water quality profile by the method of creating a water quality profile according to one embodiment of the present invention, and observing and analyzing the shape of the inflection point or the like indicated by the water quality profile. Is possible. Furthermore, depending on the fluctuation range of the water quality at the inflection point, the number of inflection points appearing in the scatter diagram, or the position of the inflection point on the horizontal axis of the scatter diagram, the degree of abnormality of the separation membrane module or the abnormality is determined. It is also possible to detect the occurrence position of the abnormality including the site where the error occurred (whether it is a separation membrane or a connector).
- a water quality profile for a separation membrane module in which no abnormality has occurred that is, a so-called normal state, is created in advance, and a water quality profile when an abnormality has occurred in the separation membrane module is prepared.
- the operating conditions such as the recovery rate may be changed from those in the normal operation.
- a manufacturer of a reverse osmosis membrane element included in a separation membrane module can operate under the same conditions as the standard conditions for evaluating the performance of the reverse osmosis membrane, thereby detecting occurrence of abnormality with extremely high accuracy. .
- a model water having a known and constant component as the water to be treated.
- a water quality indicator marker that facilitates detection or visualization of turbidity, fine particles, salts, fluorescent dyes and the like may be added to the model water.
- the water quality index marker a marker having a high rejection of the separation membrane is preferable in order to make the change in water quality of permeated water more remarkable when an abnormality occurs.
- the water quality profile creation method in order to detect the abnormality of the separation membrane module with high accuracy, it is preferable to continuously create the water quality profile by the water quality profile creation method according to the embodiment of the present invention intermittently at regular intervals.
- FIG. 4 is a schematic flow chart showing another example of the configuration of the water treatment apparatus for realizing the separation membrane module inspection method of the present invention.
- FIG. 4 by providing a plurality of treated water supply ports in the separation membrane module 4 and changing the flow rates of the respective treated water supplied from the plurality of treated water supply ports, the inside of the separation membrane module is changed. , The flow direction of the water to be treated can be changed, and a plurality of water quality profiles in each flow direction can be created. In this way, by comparing a plurality of water quality profiles created for one separation membrane module, the occurrence of an abnormality can be detected with higher accuracy.
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Abstract
Description
2:被処理水供給配管
3:圧力計
4:分離膜モジュール
5:被処理水供給口
6:第1透過水出口
7:濃縮水出口
8:第2透過水出口
9:第1透過水配管
10:第1流量調整弁
11:第1流量計
12:第1水質計
13:第2透過水配管
14:第2流量調整弁
15:第2流量計
16:第2水質計
17:圧力容器
18,18a,18b,18c,18d:逆浸透膜エレメント
19,19a,19b,19c:コネクタ
20:端板
21:端板
22:第1被処理水供給配管
23:第1被処理水切替弁
24:第1被処理水圧力計
25:第1被処理水供給口
26:第2被処理水供給配管
27:第2被処理水切替弁
28:第2被処理水圧力計
29:第2被処理水供給口
Claims (6)
- (1)被処理水供給口と、複数の透過水出口とを有する分離膜モジュールに、被処理水を供給して、透過水を得る、ステップ1と、
(2)前記複数の透過水出口から流出するそれぞれの透過水の流量の比を変化させる、ステップ2と、
(3)前記ステップ2の後に、前記それぞれの透過水の水質を測定する、ステップ3と、
(4)前記ステップ2で変化させた、前記それぞれの透過水の流量の比と、前記ステップ3で測定した、前記それぞれの透過水の水質と、の関係を、散布図としてプロットする、ステップ4と、を備え、
前記ステップ2~4を複数回繰り返す、水質プロファイルの作成方法。 - (1)前記ステップ1において、前記分離膜モジュールに被処理水を供給する際に、流速Q1で供給し、
(2)前記ステップ2において、前記被処理水の流速Q1および上記複数の透過口から流出するそれぞれの透過水の流速の合計Q2を維持しながら、それぞれの透過水の流量の比を変化させる、
請求項1記載の水質プロファイルの作成方法。 - 前記複数の透過水出口が、前記分離膜モジュールの長手方向における位置が異なるように配置されている、請求項1又は2記載の水質プロファイルの作成方法。
- 前記ステップ3で測定する前記水質が、電気伝導度、比抵抗、蒸発残留物濃度、塩分濃度、ホウ素濃度、紫外線吸光度、放射性物質濃度及び濁度からなる群から選ばれる指標である、請求項1~3のいずれか1項記載の水質プロファイルの作成方法。
- (1)被処理水供給口と、複数の透過水出口とを有する分離膜モジュールに、被処理水を供給して、透過水を得る、ステップ1と、
(2)前記複数の透過水出口から流出するそれぞれの透過水の流量の比を変化させる、ステップ2と、
(3)前記ステップ2の後に、前記それぞれの透過水の水質を測定する、ステップ3と、を備え、
前記ステップ2及び3を複数回繰り返し、その結果から、前記分離膜モジュールにおける異常の有無、異常の程度、又は、異常の発生位置を検知する、分離膜モジュールの検査方法。 - 被処理水供給口と、複数の透過水出口と、を有する分離膜モジュールと、
前記複数の透過水出口から流出するそれぞれの透過水の流量を独立して変化させる、流量調整手段と、
前記複数の透過水出口から流出するそれぞれの透過水の水質を測定する、水質測定手段と、
前記それぞれの透過水の流量の変化と、前記それぞれの透過水の水質との関係から、前記分離膜モジュールにおける異常の有無、異常の程度、又は、異常の発生位置を検知する、検知手段と、を備える、水処理装置。
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WO2023100958A1 (ja) * | 2021-11-30 | 2023-06-08 | 東レ株式会社 | 分離膜エレメントの状態診断方法 |
WO2023127810A1 (ja) * | 2021-12-27 | 2023-07-06 | 東レ株式会社 | 分離膜モジュールの診断方法、分離膜モジュールの劣化診断装置 |
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JP2013022543A (ja) * | 2011-07-25 | 2013-02-04 | Kubota Corp | 膜処理装置および膜モジュールの運転方法 |
JP2013154293A (ja) * | 2012-01-30 | 2013-08-15 | Mitsubishi Heavy Ind Ltd | 逆浸透膜淡水化装置の検査装置、及び検査方法、並びに逆浸透膜淡水化システム |
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US20210370235A1 (en) | 2021-12-02 |
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JP6825724B2 (ja) | 2021-02-03 |
JPWO2020071507A1 (ja) | 2021-02-15 |
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KR20210055054A (ko) | 2021-05-14 |
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