JP2007240373A - Membrane damage detection device and method for filtration system for water treatment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect membrane damages by detecting the vibration in a membrane modules from the outside. <P>SOLUTION: In a filtration system for feeding raw water to membrane modules to distribute treated water purified in the membrane module, a membrane damage detection device of a filtration device for water treatment comprises a pressurized air supply means for supplying pressurized air of a predetermined pressure to the primary sides or to the secondary sides of the membrane modules 1<SB>1</SB>to 1<SB>n</SB>; vibration detection sensors 21<SB>1</SB>to 21<SB>n</SB>for detecting vibrations by bubble flows that leak out from the damage portions and rise up in water; and a vibration analysis process device 22 for detecting the membrane damages of the membrane modules, by individually selecting vibration signals that are detected by each of the vibration detection sensors 21<SB>1</SB>to 21<SB>n</SB>to analyzing each of the vibration signals. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is used in water treatment, sewage treatment, industrial wastewater treatment, food wastewater treatment, water treatment of nuclear power plants, etc., and a membrane of a filtration system for water treatment that separates and removes turbid components contained in raw water. The present invention relates to a damage detection apparatus and a film damage detection method.

  Conventionally, several membrane damage detection techniques have been proposed for detecting damage to a hollow fiber membrane in a water treatment filtration system.

  As one of the membrane damage detection technologies, the tube is taken out so as to communicate with the hollow fiber and the space between the housings of each membrane module, the hollow fiber and the raw water between the housings are filled through this tube, and inside each hollow fiber A step of supplying a gas at a predetermined pressure; a transducer for detecting a liquid level having a predetermined interval on the tube; and a hollow fiber generated by moving the gas from the inside of each hollow fiber to the outside, between the housing The step of measuring the drainage rate of the purified water from the space from the time required for the rise of the liquid level between the two predetermined parts, and the drainage rate of the purified water from between the hollow fiber and the housing measured in this step are determined in advance. This is a membrane damage detection method comprising a step of detecting a membrane module of a defective hollow fiber such as a membrane rupture when a predetermined value is exceeded (Patent Document 1).

As another membrane damage detection technique, raw water is filled from below a plurality of filter elements arranged in the housing, and then air of a predetermined pressure is fed from below the filter elements. Furthermore, a plurality of acoustic detection sensors such as microphones are installed in the upstream region of the plurality of filter element assemblies, and when one or more of the plurality of filter elements are broken by membrane breakage when air of the predetermined pressure is sent. It is composed of acoustic detection means for detecting and outputting sound such as leaking bubbles, and an arithmetic processing circuit for finding the position of the defective filter element based on a signal output from the acoustic detection means (Patent Document) 2).
Japanese Patent No. 3364804 JP-T-2001-518380

  In the former membrane damage detection technique, a tube is communicated with the space between the hollow fiber and the housing and pulled out to the outside, so that the module itself as a product may be damaged or the performance of the product may be deteriorated.

  On the other hand, in the latter membrane damage detection technology, since the sound is detected by the acoustic detection sensor, an error occurs unless the environmental sound from the outside, that is, the external sound generated during operation of the water treatment facility is completely blocked. There's a problem.

  The present invention has been made in view of the above circumstances, and provides a membrane damage detection device and membrane damage detection method for a water treatment filtration system that can detect vibration in a membrane module from the outside and detect membrane damage in real time. The purpose is to do.

(1) In order to solve the above-mentioned problem, the membrane damage detection device of the filtration system for water treatment according to the present invention is configured to apply pressurized air having a predetermined pressure from the primary side or the secondary side of the membrane module. An air supply means, a vibration detection sensor that is attached to the upper part of the membrane module and detects vibration caused by a bubble flow leaking from the damaged portion of the membrane and rising in the water, and a vibration signal detected by the vibration detection sensor A vibration analysis processing device for detecting membrane damage of the membrane module by analysis is provided.

  The predetermined pressure of the pressurized air to be supplied is less than the bubble point pressure of the membrane where the pressurized air does not pass through the membrane when the membrane is not damaged, and the membrane is damaged when the membrane is damaged. Pressure from which pressurized air passes through the membrane to form bubbles and passes through the water (that is, water pressure from the supply location of pressurized air to the open portion of the water in which bubbles that have passed through the membrane rise into the atmosphere) ) These pressures are set as appropriate.

  Further, the membrane damage detection device for a water treatment filtration system according to the present invention includes a pressurized air supply means for supplying pressurized air of a predetermined pressure to a primary side or a secondary side of the membrane module, and each of the membrane modules. A vibration amplification unit that amplifies the vibration transmitted to the surface of each membrane module by the bubble flow leaking into the water from the damaged part of the membrane of the membrane module, and the vibration amplification unit attached to the vibration amplification unit. Vibration analysis sensor for detecting membrane damage of the membrane module by individually selecting each vibration detection sensor for detecting the detected vibration and vibration signal detected by each vibration detection sensor and analyzing the vibration signal It is the structure which provided.

(2) Moreover, the membrane damage detection method of the filtration system for water treatment which concerns on this invention WHEREIN: The stage which supplies the pressurized air of predetermined pressure to the primary side or secondary side of the said membrane module, The upper part of the said membrane module A vibration detection sensor is attached to the membrane module to detect vibrations transmitted to the surface of the membrane module by a bubble flow leaking from a damaged portion of the membrane constituting each membrane module, and a vibration signal (raw signal detected by the vibration detection sensor). Data) or filtering processing data of the vibration signal and analyzing the skewness and kurtosis to determine the degree of membrane damage of the membrane module.

  Furthermore, a step of performing a Fourier analysis based on the filtering processing data and judging the degree of membrane damage of the membrane module may be added to the membrane damage detection method as described above.

  ADVANTAGE OF THE INVENTION According to this invention, the membrane damage detection apparatus and membrane damage detection method of the filtration system for water treatment which can detect the vibration of a membrane module from the outside, and can detect the degree of membrane damage of the membrane which comprises a membrane module easily can be provided. .

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall configuration diagram of a water treatment filtration system to which a membrane damage detection apparatus according to the present invention is applied.
The water treatment filtration system includes a plurality of membrane modules (filter element) 1 ₁ 1n, connected to one end of the primary side of the membrane module 1 ₁ 1n, the in the respective membrane module 1 ₁ 1n The raw water supply pipe 2 for supplying the raw water which is the treated water and the treated water purified by the membrane modules 1 _{1 to 1} n connected to the other end side which is the secondary side of each of the membrane modules 1 _{1 to 1} n described above. And a treated water pipe 3 for distributing water. In addition, in FIG. 1, 1a represents typically the film | membrane comprised by many hollow fibers 12, ... mentioned later.

As shown in FIG. 2, each of the membrane modules 1 1 to ₁ n is housed in the housing 11 in a vertical direction with a number of hollow fibers 12,... Having fine holes, sealed at the lower end and opened at the upper end. Is. Both ends of the hollow fibers 12,... Are bound by a resin lower partition wall 13 and an upper partition wall 14 fixed to the housing, and the lower partition wall 13 is provided with a through hole 15 through which raw water flows. A raw water supply pipe 2 is connected to the lower part (primary side of the membrane module) of the housing 11, and a treated water pipe 3 is connected to the upper part (secondary side of the membrane module). The membrane module units 1 1 to ₁ n are not limited to the configuration shown in FIG. 2, and various conventionally known membrane modules for water treatment are used.

The membrane damage detecting apparatus applied to the above-described filtration systems for water treatment, each mounted on the top of each membrane module 1 ₁ 1n, the vibration detecting sensor 21 ₁ which detects the vibration transmitted on the surface of the membrane module 1 ₁ 1n To 21n and a vibration analysis processing device 22 for performing vibration analysis processing based on vibration signals detected by the vibration detection sensors 21 _{1 to} 21n and individually detecting damage to the membrane modules 1 _{1 to} 1n. It has been. The vibration analysis processing device 22 includes an operation monitoring unit 23 and a vibration analysis unit 24.

25 is an air supply pipe for supplying air, and 26 is a discharge pipe for discharging cleaning wastewater and air scrubbing air at the time of cleaning. Can be used. Reference numeral 41 denotes a drain valve for discharging the raw water on the primary side of each of the membrane modules 1 1 to ₁ n when membrane damage is detected, and 42 is an automatic air vent valve for automatically extracting the air in the treated water pipe 3. Valves 27, 28, 29, and 30 are installed on the inlet side and the outlet side of the pipes 2, 3, 25, and 26, respectively.

As each of the vibration detection sensors 21 _{1 to} 21 n, an acceleration sensor is used, and is attached to the upper part of each membrane module 1 _{1 to 1} n by a screw, a magnet, an adhesive, or the like.

Furthermore, each membrane module ₁ 1 1n mounting the vibration detecting sensor 21 ₁ 21n on top of it, for example, FIG. 3 at the top of each membrane module _{1 1 ~1n} (a), the vibration amplifying unit as shown in (b) It may be attached via 31. 3A is a side view of the vibration amplification unit 31, and FIG. 3B is a top view of the vibration amplification unit 31. FIG.

  The vibration amplifying unit 31 has, for example, a cylindrical outer shape. From the lower side (membrane module side) to the upper side, the lower flange 32, a rubber adhesive 33 having a low vibration propagation ability, a wire mesh 34, for example, about 4 mmφ. The hollow pipe 35, the rubber adhesive 36 having a low vibration propagation ability, and the lower flange 37 are laminated in this order.

The front end portion of the hollow pipe 35 is disposed so as not to contact the outer ring side of the vibration amplification unit 31 or the outer ring side of the wire mesh 34, and the rear end portion is mounted for installing the vibration detection sensors 21 _{1 to} 21n. A screw 38 is attached. Further, if the outside of the hollow pipe 35 can be welded to the wire mesh 34 as required, it can be welded.

By attaching the vibration amplification unit 31 as described above to the upper part of each membrane module 1 _{1 to} 1n, not only the vibration noise from the outside is blocked, but also the air pool for detecting the original membrane damage is promoted and the vibration is further increased. It has a function to arouse.

Output ends of the vibration detection sensors 21 _{1 to} 21 n are connected to the vibration analysis unit 24 via the transmission line 39. In general, the vibration detection sensors 21 ₁ to 21 n output analog vibration signals, but may be configured to output digital vibration signals.

The vibration analysis unit 24 is configured as shown in FIG. That is, the vibration analysis unit 24 includes signal input ports 241 _{1 to} 241 n for capturing vibration signals of the vibration detection sensors 21 _{1 to} 21 n, a program data storage unit 242 for storing predetermined sequence program data, and signal input ports 241 _{1 to} 241 n. Is composed of a database 243 for storing necessary data including vibration signal data input from, a vibration analysis processing unit 244 including a CPU for executing vibration analysis processing, and the like.

The database 243 includes a damage determination data storage area 243a, a raw data storage area 243b, a filter processing data storage area 243c, an analysis data storage area 243d, a damage determination result data storage area 243e, and other areas for storing necessary data. Yes. In the damage determination data storage area 243a, past distortions of experience, past experiments, etc., store the vibration signal skewness, kurtosis, frequency and other necessary damage determination data caused by partial breakage, complete breakage, etc. of the hollow fiber membrane. Has been. Note that the film damage of the vibration signal may be determined using one or a plurality of combination data among the above-described damage determination data. In the raw data storage area 243b, time-series vibration signals for the respective membrane modules 1 _{1 to 1} n taken from the signal input ports 241 ₁ to 241 n are stored. In the filter processing data storage area 243c, filtering processing data obtained by filtering the vibration signal for each of the membrane modules 1 _{1 to} 1n is stored. The analysis data storage area 243d stores necessary data such as skewness, kurtosis, frequency, and the like obtained by analyzing the vibration signal for each of the membrane modules 1 _{1 to} 1n. Further, determination result data for each of the membrane modules 1 _{1 to 1} n is stored in the damage determination result data storage area 243e.

The vibration analysis processing unit 244 executes a predetermined vibration analysis process based on the sequence program data in the program data storage unit 242. Functionally, the signal input ports 241 ₁ to 241 n are individually selected every predetermined cycle (for example, one day, one week or two weeks), and detected by the vibration detection sensors 21 _{1 to} 21 n over a predetermined time. Sensor selection data collection means 244A that captures the vibration signal to be stored in the raw data storage area 243b, and a film such as skewness and kurtosis from the raw data or filtered vibration signal captured by the sensor selection data collection means 244A Damage tendency analysis means 244B for acquiring damage tendency analysis data, Fourier analysis means 244C for performing fast Fourier analysis (FFT) processing on the filtered vibration signal and performing high-accuracy frequency analysis, and these vibration trends Obtained by either or both of the analysis means 244B and the Fourier analysis means 244C, for example Time, kurtosis, damage judgment by comparing the damage determination data stored in the data and damage determination data storage area 243a such as frequency, to determine the portion of each membrane module 1 ₁ 1n breakage or complete breakage Means 244D and data transmitting / receiving means 244E for exchanging data between the operation monitoring unit 23 are provided.

  The vibration tendency analysis means 244B is effective when grasping the tendency of film damage from the skewness and kurtosis of the vibration signal and determining the degree of film damage and abnormality. The Fourier analysis means 224C is effective when performing a fast Fourier analysis of the vibration signal and performing a detailed analysis of the film damage.

  The operation monitoring unit 23 receives a data request command including a vibration measurement start command and a necessary control command, and sends them to a vibration analysis unit 24. An input unit such as a keyboard and a mouse, a display unit such as a display, and a vibration analysis unit 24 It consists of a memory that temporarily stores received data. The vibration measurement start command can include sensor designation information for taking in only vibration from a specific vibration detection sensor. In addition, the operation monitoring unit 23 automatically transmits a vibration measurement start command every predetermined cycle, but can also output a vibration measurement start command based on an arbitrary determination by the operator.

  Next, the operation of the membrane damage detection apparatus including the water treatment filtration system as described above and the operation of the membrane damage detection method according to the present invention will be described.

(1) About normal water purification treatment.

a) After closing the valve 30 for feeding pressurized air and the drainage exhaust valve 29, the valves 27 and 28 are set to open. In this state, the raw water is sent to the membrane modules 1 ₁ to ₁ n through the raw water supply pipe 2.

b) In each of the membrane modules 1 1 to ₁ n, when the raw water as the water to be treated flows through the micropores of the hollow fibers 12,..., impurities are removed and purified.

c) The treated water flowing out from each of the membrane modules 1 ₁ to ₁ n passes through the treated water pipe 3 and is distributed to appropriate external equipment and facilities.

(2) About membrane damage detection processing.

Prior to the vibration measurement start command, a valve opening / closing signal is sent from the operation monitoring unit 23 or other monitoring control unit (not shown) under the operator's operation command or periodically, and the water treatment filtration system is damaged. Set the detection state. That is, after closing the valve 27 and shutting off the raw water, the valve 29 is opened, the drain valve 41 is opened for a predetermined time T1 (approximately 30 seconds), and the primary side of each membrane module 1 _{1 to} 1n and the raw water are drained. Then, the drain valve 41 drainage exhaust valve 29 is closed. Thereafter, together with the vibration measurement start command from the operation monitoring unit 23, the valve 30 is opened for a predetermined time T2, and pressurized air with a predetermined pressure is sent into the air supply pipe 25. As a result, if the hollow fiber membranes of the membrane modules 1 1 to ₁ n are damaged, the pressurized air leaks from the portions and a bubble flow is generated on the secondary side.

  This film damage detection process may be performed at the same time as cleaning of the film such as backflow cleaning or air scrubbing.

  When the membrane damage detection process is performed, the side opposite to the side where pressurized air is supplied to the membrane module (secondary side when pressurized air is supplied to the primary side) is in a state in which water enters. The pressurized air may be supplied from either the primary side or the secondary side of the membrane module as long as the pressurized air leaked from the damaged portion of the membrane rises as a bubble flow in the water.

  When the vibration analysis processing unit 244 of the vibration analysis unit 24 receives a vibration measurement start command from the operation monitoring unit 23, the vibration analysis processing unit 244 executes a series of vibration analysis processes shown in FIG. 5 based on the sequence program data in the program data storage unit 242.

That is, the vibration analysis processing unit 244 performs initialization processing such as clearing unnecessary data in the database 223 (S1), and then sets i = 1 in each of two counter memories (not shown) of appropriate storage means. (corresponding to the sensor 21 _1), to set the t = 0 (S2, S3), selects the signal input port 221 _1, a vibration signal detected by the installed vibration detecting sensor 21 ₁ to membrane module 1 ₁ The data is taken in and stored in the raw data storage area 233b of the database 243 in time series (S4) and sent to the operation monitoring unit 23 via the data transmission / reception means 244E (S5). Then, the vibration signals detected by the vibration detection sensor 21 ₁ are collected and stored until a predetermined time t = T (t <T) elapses (S4 to S6).

  Further, the vibration analysis processing unit 244 determines whether or not to perform the filtering process (S7). If it is determined to perform the filtering process, the vibration analysis process unit 244 executes the filtering process (S8) and is superimposed on the vibration signal that is raw data. The filtering processing data from which the noise component is removed is similarly stored in the filtering processing data area 243c of the database 243 and sent to the operation monitoring unit 23 via the data transmitting / receiving means 244E (S9). A series of these processing steps S2 to S9 corresponds to the sensor selection data collecting means 244A shown in FIG.

After collecting the vibration signals related to the vibration detection sensor 21 ₁ over the predetermined time T as described above, the film damage tendency to acquire the skewness, the kurtosis, etc. for this time-series vibration signal (raw data) and filtering processing data. An analysis process is performed (S10), and the analysis data is stored in the analysis data storage area 243d of the database 243 and displayed on the display unit of the operation monitoring unit 23 through the data transmission / reception means 244E (S11). FIG. 6 is a diagram showing a display example of film damage tendency analysis data. This step S10 corresponds to the damage tendency analyzing means 244B shown in FIG.

  Accordingly, the monitor can confirm the degree of film damage from the film damage tendency analysis data shown in FIG. 6, for example, the skewness and kurtosis.

Further, the vibration analysis processing unit 244 compares one or both of the skewness and kurtosis of the vibration signal obtained by the analysis processing with the damage determination data stored in the storage area 243a of the database 243, and performs analysis. skewness and analysis kurtosis according to whether it exceeds a membrane damage determination data, to determine the extent of damage of the hollow fiber membranes forming each hollow fiber membrane module 1 ₁ (S12), as the analysis result data The data is stored in the analysis result data storage area 243e and transmitted to the operation monitoring unit 23 (S13). These steps S12 and S13 correspond to the damage determination means 244D shown in FIG.

Next, it is determined whether or not precise analysis is to be performed (S14). If it is determined that precise analysis is to be performed, fast Fourier analysis processing is executed from the filtered vibration signal, and highly accurate frequency analysis processing is performed. executed (S15), a Fourier analysis result stored in the analysis result data storage area 243e of the data base 243 about the membrane module 1 _1, and sends the operation monitoring unit 23 (S16). FIG. 7 is a diagram showing an analysis result of acceleration and frequency obtained by the fast Fourier analysis process. Further, the monitor displays the frequency analysis result on the display unit of the operation monitoring unit 23. For example, when an acceleration change occurs in a frequency region different from the normal vibration frequency as shown in FIG. You may determine evaluation, such as complete fracture containing. These steps S14 to S16 correspond to the Fourier analysis means 244 shown in FIG.

It should be noted that data for determining damage that prescribes the relationship between acceleration and frequency for determining the degree of film damage of the film modules 1 1 to ₁ n in advance is stored in the data storage area 243a, and the data for damage determination and Fourier analysis result data are stored. And the degree of film damage may be automatically determined and displayed on the display unit of the operation monitoring unit 23. This process corresponds to the damage determination means 244D shown in FIG.

Subsequently, it is determined whether the process continues (S17), increments the +1 corresponding counter memory when processing continues (S18), the process proceeds to step S3, the vibration detection sensor 21 installed in membrane module 1 ₂ captures the vibration signals detected by _two, repeatedly executes the same processing as described above, to determine the degree of membrane damage of the membrane module 1 _2.

Therefore, according to the above-described embodiment, each membrane module 1 ₁ fitted with a vibration detecting sensor 21 ₁ 21n to 1n, each membrane module 1 from the vibration signal detected by the vibration detecting sensors 21 ₁ 21n _{Since 1 to} 1n of membrane damage is detected, there is no need to bother to open a part of the membrane module and attach detection elements necessary for membrane damage detection as in the past, and to affect the performance of the membrane module. Without any damage.

Further, when mounting the vibration detecting sensor 21 ₁ 21n to each membrane module 1 ₁ 1n upper, transmitted to the surface by each membrane module 1 ₁ 1n upper bubble flow the out flow from the membrane module 1 ₁ 1n of If the vibration amplification unit 31 for amplifying the incoming vibration is attached and the vibration detection sensors 21 ₁ to 21 n are attached to each of the vibration amplification units 31, not only external noise can be blocked, but also the original film damage is detected. For this reason, it is possible to increase the air pool for the purpose, to detect more amplified vibrations, and to enhance the membrane damage ability of each of the membrane modules _{11 to} 1n.

Further, by filtering the vibration signals (raw data) detected by the vibration detection sensors 21 _{1 to} 21 n, noise components superimposed on the vibration signals can be removed, and high vibration analysis can be performed on the vibration signals.

Furthermore, the above-described embodiment analyzes the degree of vibration and kurtosis from vibration signals (raw data) or filtering data and evaluates the vibration tendency, which is useful for determining the degree of film damage of the film modules _{11 to} 1n. . In addition to evaluating vibration tendencies, Fourier analysis can be performed based on filtering processing data to reliably analyze frequencies that are different from normal vibration frequencies, and to ensure membrane damage to membrane modules 1 _{1 to 1} n. Can be detected.

Further, since the mounting always vibration detecting sensor 21 ₁ 21n to each membrane module 1 ₁ 1n upper analyzes vibration signal detected by the vibration detecting sensor 21 ₁ 21n constant period or an appropriate timing, water treatment The vibration can be analyzed in real time using a small amount of time during the operation of the filtration apparatus, and problems such as incomplete treatment and distribution of untreated water can be greatly reduced.

(Other embodiments)
In the above embodiment, the membrane damage of all the membrane modules 1 _{1 to} 1n is detected. For example, a specific one or more membrane modules are specified, and only the membrane damage of the corresponding membrane module is detected. Also good.

Further, as shown in FIG. 1, a data collection server 43 is installed in a monitoring center or the like, and connected to the data transmission means 224E of the diagnostic analysis processing device 22 via a dedicated line or the Internet network 44, and the membrane modules 1 _{1 to} 1n. In addition to the membrane damage detection signal, various pieces of equipment operation information related to the water treatment facility may be collected and comprehensively monitored.

Furthermore, from the viewpoint of the reliability of the vibration detection sensors 21 _{1 to} 21n, the vibration coefficient during normal operation is periodically detected, and if necessary, the vibration coefficient of the vibration detection sensors 21 _{1 to} 21n due to secular change is detected. It is good also as a structure which correct | amends a change part and obtains an exact vibration signal.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

The whole block diagram of the filtration apparatus for water treatment to which one Embodiment of the film | membrane damage detection apparatus which concerns on this invention is applied. The schematic block diagram of the membrane module integrated in the filtration apparatus for water treatment shown in FIG. The side view and front view of a vibration amplification unit which are arrange | positioned between a membrane module upper part and a vibration detection sensor. The block diagram explaining one Embodiment of the vibration-analysis processing apparatus shown in FIG. The processing procedure figure explaining the operation | movement of the film | membrane damage detection apparatus which concerns on this invention, and the film | membrane damage detection method. The figure which shows the kurtosis obtained by the tendency analysis of a vibration. The figure which shows the relationship between an acceleration and a vibration frequency.

Explanation of symbols

1 _{1 to} 1n: Membrane module (filter element), 1a ... membrane, 2 ... raw water supply pipe, 3 ... treated water pipe, 11 ... housing, 12 ... hollow fiber, 13 ... lower partition, 14 ... upper partition, 5 DESCRIPTION OF SYMBOLS ... Through-hole, 21 < ₁ > -21n ... Vibration detection sensor, 22 ... Vibration analysis processing apparatus, 23 ... Operation monitoring part, 24 ... Vibration analysis part, 25 ... Air supply piping, 26 ... Return water discharge piping, 27-30 ... Valve, 31 ... Vibration amplification unit, 39 ... Transmission line, 41 ... Drain valve, 42 ... Automatic air vent valve, 43 ... Data collection server, 44 ... Network, 243 ... Database, 244 ... Vibration analysis processing unit, 244A ... Sensor selection Data collection means, 244B ... vibration tendency analysis means, 244C ... Fourier analysis means, 224D ... damage judgment means, 224E ... data transmission / reception means.

Claims (7)

In a water treatment filtration system for supplying raw water to a membrane module and distributing treated water purified by the membrane module,
Pressurized air supply means for supplying pressurized air of a predetermined pressure to the primary side or secondary side of the membrane module;
A vibration detection sensor that is attached to the upper part of the membrane module and detects vibration caused by a bubble flow leaking from a damaged portion of the membrane and rising in water,
For water treatment, comprising: a vibration analysis processing device for individually detecting vibration signals detected by each vibration detection sensor and analyzing the vibration signals to detect membrane damage of the membrane module Membrane damage detection device for filtration system. In a water treatment filtration system for supplying raw water to a membrane module and distributing treated water purified by the membrane module,
Pressurized air supply means for supplying pressurized air of a predetermined pressure to the primary side or secondary side of the membrane module;
A vibration amplification unit that is attached to the upper part of the membrane module and amplifies the vibration transmitted to the surface of the membrane module by the bubble flow that leaks from the damaged part of the membrane and rises in the water,
A vibration detection sensor attached to each vibration amplification unit and detecting the amplified vibration;
A membrane damage detection device for a water treatment filtration system, comprising: a vibration analysis processing device for detecting membrane damage of the membrane module by analyzing a vibration signal detected by the vibration detection sensor. In the membrane damage detection device of the filtration system for water treatment according to claim 1 or claim 2,
The vibration analysis processing device performs vibration analysis processing using one or both of a vibration signal (raw data) detected by a vibration detection sensor and filtering processing data obtained by filtering the vibration signal. Membrane damage detection device for water treatment filtration systems. In the membrane damage detection device of the filtration system for water treatment according to any one of claims 1 to 3,
The vibration analysis processing device analyzes the degree of film damage of the membrane module by analyzing the skewness and kurtosis from vibration signals (raw data) or filtering processing data of the vibration signals, and the filtering A membrane damage detection device for a filtration system for water treatment, comprising Fourier analysis means for performing Fourier analysis based on treatment data and judging the degree of membrane damage of the membrane module. In the membrane damage detection device for a filtration system for water treatment according to any one of claims 1, 2, and 4,
When an acceleration sensor is used as the vibration detection sensor,
Membrane damage detection of a water treatment filtration system characterized in that the Fourier analysis means determines the degree of membrane damage of the membrane module from the acceleration and vibration frequency different from normal times caused by membrane damage of the membrane module apparatus. In a water treatment filtration system for supplying raw water to a membrane module and distributing treated water purified by the membrane module,
Sending pressurized air of a predetermined pressure to the primary side or secondary side of the membrane module;
Attaching a vibration detection sensor to the upper part of the membrane module, and detecting vibrations transmitted to the surface of the membrane module by a bubble flow leaking into the water from the membrane constituting the membrane module;
Analyzing the skewness and kurtosis from the vibration signal (raw data) detected by the vibration detection sensor or the filtering processing data of the vibration signal, and determining the degree of membrane damage of the membrane module. A method for detecting membrane damage in a filtration system for water treatment. In the membrane damage detection method of the filtration system for water treatment according to claim 6,
A membrane damage detection method for a filtration system for water treatment, further comprising the step of performing a Fourier analysis based on the filtering processing data and judging the degree of membrane damage of the membrane module.

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