KR20210011367A - Inventory system diagnostic device - Google Patents

Abstract

As a diagnostic device for diagnosing the operation state of a making-membrane device (5) that filters water to be treated, the relationship between the input unit of the operation state information of the making-treatment system, and the operation of the making system and countermeasures A diagnostic apparatus for a delivery system, comprising: a storage unit for storing indicated data; and a determination unit for determining a countermeasure against an inconsistency in operation of the deposition film apparatus based on operation state information input from the input unit and data stored in the storage unit.

Description

Inventory system diagnostic device

The present invention relates to a diagnostic device for determining a countermeasure against an inconsistency in the operation of a defrosting system that treats a water to be treated as a defrosting film (除濁膜).

In water treatment using well water, industrial water, tap water, etc. as raw water, various wastewater treatment, wastewater recovery, etc., various water treatments are performed. For example, by adding a coagulant to raw water, the suspended substances, colloidal components, organic substances, etc. in raw water are condensed and coarsened (粗大化). After the water treatment, solid-liquid separation is performed by sedimentation, flotation, filtration, membrane filtration, or the like. Water treatment in which the treated water is recovered by washing and sterilizing is performed by membrane filtration alone.

The causes of membrane blockage of the membrane filtration device include (i) excessive water supply turbidity, (ii) poor backwashing, and (iii) poor pretreatment when there is a treatment before the deposition membrane. As a countermeasure, the following are being implemented.

For (i), for example, the turbidity of water supply for the formation of the membrane is measured. If the turbidity is higher than the predetermined level, it is responded by changing the water passing time. About (ii), for example, the air bubbling amount is checked, and when it is less than a predetermined bubbling amount, it is adjusted so that it may become more. For (iii), the addition concentration of the coagulant in the pretreatment is checked, and when the concentration is less than or equal to the predetermined addition concentration, it is adjusted to be higher than that.

When the filtration resistance of the deposition membrane is increased, backwashing or chemical cleaning with acid, alkali, or the like is performed (Patent Document 1, etc.).

(Patent Document 1) Japanese Laid-Open Patent Publication No. 2004-58022

There are many causes such as excessive turbidity of the water supply, problems in the operation of the depositing membrane (non-backwashing, etc.), and poor pretreatment as the cause of the clogging of the deposition membrane.Since countermeasures are different depending on the cause, the cause is accurately determined and It is required to devise appropriate countermeasures.

An object of the present invention is to provide an apparatus for diagnosing an inventory system capable of accurately determining a countermeasure against an inconsistency in the operation of the inventory system.

The diagnostic device of the present invention is a diagnostic device for diagnosing an operation state of a decontamination system having a decontamination membrane device for membrane filtering of water to be treated, and an input unit for inputting operation state information of the decontamination system and an operation of the decontamination system It has a storage unit that stores data indicating the relationship between the relief state and the countermeasure, and a determination unit that determines a countermeasure against the operation relief of the deposition film based on the operation state information input from the input unit and the data stored in the storage unit. .

In one aspect of the present invention, the input unit includes a display means for displaying a plurality of questions and an input means for answering a question.

In one aspect of the present invention, an agglomeration treatment device is provided in the front end of the deposition membrane device.

In one aspect of the present invention, the operation state information includes the SS and pH of the water supply to the deposition membrane device, the MFF value of the treated water, the backwash air pressure of the deposition membrane device, the backwash water amount of the deposition membrane device, and the coagulation treatment device. It is at least any of the added amounts of the flocculant.

In one aspect of the present invention, the diagnosis is carried out when the membrane differential pressure of the deposition membrane device is equal to or greater than a predetermined value, or when the rate of increase of the membrane differential pressure becomes equal to or greater than a predetermined value.

According to the present invention, it is possible to accurately diagnose the operation state of the making system.

According to one aspect of the present invention, the cause of the relief of the making system can be appropriately specified.

1 is a configuration diagram of a deposition film system.
2 is a configuration diagram of a diagnostic apparatus for a deposition film system.
3 is a flow chart showing a method of diagnosing the deposition membrane system.

1 is a configuration diagram of a making system according to an embodiment. After the raw water is coagulated in the flocculating device 1, the raw water is supplied to the deposition membrane device (the UF membrane module in this embodiment) 5 through the pump 2, the valve 3, and the pipe 4. The permeated water of the membrane 5a is taken out as treated water through the pipe 6 and the valve 7. Pressure sensors 8 and 9 are formed in the pipes 4 and 6, respectively. A pH meter 19 is provided so as to measure the pH of the coagulation-treated water from the coagulation device 1.

In order to backwash the membrane forming apparatus 5 with air or water, air for backwashing can be supplied to the secondary side of the membrane 5a through the pipe 10 and the valve 11. The backwash water can be supplied through the pipe 12 and the valve 13. Air or water that has permeated the membrane 5a from the secondary side to the primary side can be discharged from the primary side of the membrane 5a through the backwash fluid discharge pipe 17 and the discharge valve 18. A flow meter 14 and a pressure sensor 15 are formed in the backwash air piping 10. The backwash pipe 12 is provided with a flow meter 16.

An air supply pipe for bubbling cleaning by supplying air to the primary side of the membrane 5a may be connected to the primary side.

When performing a normal membrane filtration operation, only the valves 3 and 6 are opened, and the other valves 11, 13 and 18 are closed. When performing backwashing with air or water, the valves 3 and 7 are closed, one or both of the valves 11 and 13 are opened, and the discharge valve 18 is opened.

The detection pressures of the pressure sensors 8 and 9 are input to the differential pressure detection circuit 20, and the difference between them is calculated as the film differential pressure. When the differential pressure is excessive (more than a predetermined value a) or the rate of increase of the differential pressure is excessive (more than a predetermined value b), a signal is sent to the alarm circuit 21 to generate an alarm by sound and/or light. Then, a signal is sent to the diagnosis device 30 to perform diagnosis.

As shown in FIG. 2, the diagnostic apparatus 30 includes a main body 31 and a liquid crystal display panel 36 as an input unit having a touch switch function. The main body 31 includes a data collection unit 32, a data storage unit 33, a database (storage unit) 34, and a determination unit 35.

The main body 31 is constituted by a computer made of a CPU (central processing unit), a flash memory, a ROM, a RAM, a hard disk, or the like.

When the CPU of the main body 31 executes the management program, the functions of the data collection unit 32, the data storage unit 33, the database 34 and the determination unit 35 are realized.

In addition to the differential pressure data, the data collection unit 32 receives response data of data for each diagnosis item from the display panel 36. The data storage unit 33 stores the response data and a determination result described later together with operation data such as differential pressure. In the database 34, data indicating the relationship between the state of inadequate operation of the inventory system and countermeasures therefor is stored.

The determination unit 35 determines a countermeasure based on the response data from the display panel 36 collected by the data collection unit 32 and the relationship data of the database 34, and displays it on the display panel 36. .

As shown in FIG. 3, when the differential pressure or the differential pressure increase rate of the deposition film device 5 is equal to or higher than a predetermined value, an alarm is activated and a plurality of questions Q1 to Qn as follows, for example, on the display panel 36 Is displayed. Also, the Yes answer switch Y and the No answer switch N are displayed adjacent to the right side of each questionnaire. Each of the answer switches Y and N has a lighting function that becomes bright when touched once, and becomes dark when touched again. Among Y and N, those that emit light in bright colors represent the selected answer. This answering operation is performed by a person in charge of operation of the deposition film system and the like. Further, an alarm switch may be displayed on the display panel 36 along with the alarm operation, and a questionnaire or the like may be displayed when a person in charge of driving or the like touches the alarm switch.

Q1: UF water supply SS concentration is less than △△ ㎎/ℓ?

Q2: Air backwash pressure is △△ ∼ □□ ㎫?

Q3: Air bubbling amount (diffuser) △△ ∼ □□ NL/min/module?

Q4: Air bubbling amount (water pipe) △△ ∼ □□ NL/min/module?

Q5: Is the water washing amount the same as the filtration flow?

Q6: What is the pH of UF water supply △△ ∼ □□?

Q7: The amount of coagulant added is △△ ∼ □□?

△△, □□ indicate specific numbers. These questions are only examples, and other questions may be displayed in addition.

After answering all questions by touching the switch Y or N, touch the Ent switch indicating the end of the answer. Thereby, the response data is transmitted from the display panel 36 to the data collection unit 32.

When the answer of Q1 is N, the determination unit 35 reads and outputs the following measures A1 to A3 from the database 34 and displays them on the display panel 36.

A1: Check the backwashing conditions and change the backwashing frequency.

A2: Confirmation/review of aggregation conditions.

A3: (If the alarm does not go off after 3 days) Clean with chemicals.

When at least one or more answers to Q2 to 5 are N, the following measures B1 and B2 are read out from the database 34 and displayed on the display panel 36.

B1: Improve backwash conditions.

B2: (If the alarm does not go off after 3 days) Clean with chemicals.

When at least one answer of Q6 and 7 is N, the following C1 and C2 are displayed.

C1: Confirmation/review of aggregation conditions is performed.

C2: The deposition membrane device is chemically washed.

When the answer is Y for any of Q1 to 7, the following display is performed by reading and outputting from the database 34. ``Since there is a high possibility that the quality of the raw water has fluctuated, contact the management department to review the coagulation conditions."

In this way, when relief occurs in the deposition film system, effective countermeasures can be taken immediately.

Although the present invention is not particularly limited, examples of raw water include tap water, industrial water, well water, and overall drainage.

Although the coagulant and coagulant aid used in the coagulation treatment are not particularly limited, it is preferable to use an iron-based coagulant.

When an iron-based coagulant is used, pH 4.5 to 7.0, particularly 5.0 to 6.0, is good. When the pH is excessively low, there is a risk of film blockage due to iron leakage. If the pH is excessively high, there is a possibility of poor aggregation.

It is preferable to add an oxidizing agent (usually Na hypochlorous acid) to the raw water. The addition amount is preferably about 0.3 to 1.0 mg/L as Cl ₂ .

The deposition membrane apparatus 5 may be of a cross flow system or a total amount filtration system.

The processing step by the deposition film forming apparatus 5 includes each step of water passing, air bubbling, backwashing, and water filling. Filtration passing time is 20 to 40 minutes. The initial differential pressure (inlet pressure-outlet pressure) is operated around 0.02 to 0.05 MPa. When the differential pressure becomes 0.07 to 0.10 MPa, it is preferable to perform stationary washing. The material of the film is preferably PVDF because of its good chemical resistance. The pore diameter is preferably 0.01 to 0.5 µm.

At the rear end of the deposition membrane device 5, an RO device or an ion exchange tower may be provided.

In the present invention, when the membrane differential pressure reaches a predetermined value (for example, 80 kPa), and the rate of increase in the membrane differential pressure becomes more than a predetermined value (for example, 1.0 kPa/day, or 20 kPa/week), You may make the above diagnosis.

In the present invention, when the membrane differential pressure reaches a predetermined value (e.g., 80 kPa), but the rate of increase of the membrane differential pressure is below a predetermined value (e.g., 1.0 kPa/day, or 20 kPa/week), the above diagnosis If the pressure difference does not decrease even after chemical washing of the deposition film without performing chemical washing and chemical washing, a countermeasure to perform the membrane exchange may be indicated.

In the present invention, when relatively clear water such as municipal water is used as raw water (water to be treated), the coagulation treatment device can be omitted.

Although the present invention has been described in detail using a specific aspect, it is clear to those skilled in the art that various modifications can be made without departing from the intention and scope of the present invention.

This application is based on Japanese Patent Application No. 2018-97217 for which it applied on May 21, 2018, The whole is used by reference.

1: flocculation treatment device
5: deposition membrane device
30: diagnostic device
36: display panel

Claims (5)

As a diagnostic device for diagnosing the operation state of a deposition system having a deposition membrane device for membrane filtration of water to be treated,
An input unit of operation state information of the delivery system;
A storage unit for storing data indicating the relationship between the operation of the trust system and the countermeasure;
An apparatus for diagnosing a manufacturing system, having a determination unit that determines a countermeasure against operation inconsistency of the deposition film apparatus based on operation state information input from the input unit and data stored in the storage unit. The method of claim 1,
The input unit includes a display means for displaying a plurality of questions and an input means for answering the questions. The method according to claim 1 or 2,
A diagnostic device for a deposition system comprising a coagulation treatment device in front of the deposition membrane device. The method according to any one of claims 1 to 3,
The operation state information includes at least one of SS and pH of the water supply to the deposition membrane device, the MFF value of the treated water, the backwash air pressure of the deposition membrane device, the backwash water amount of the deposition membrane device, and the addition amount of the coagulant in the coagulation treatment device. Diagnostic device of phosphorus inventory system. The method according to any one of claims 1 to 4,
A diagnostic device for a deposition system that performs the diagnosis when the membrane differential pressure of the deposition membrane device is equal to or greater than a predetermined value, or when the rate of increase of the membrane differential pressure is equal to or greater than a predetermined value.

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