JP5477068B2 - Water treatment system - Google Patents

Description

  The present invention relates to a water treatment system provided with a filtration device that produces suspended water by capturing suspended substances contained in raw water with a filter medium.

Conventionally, a water treatment system provided with a filtration device that captures suspended substances (for example, fine particles, organic matter, oxidized precipitates of dissolved iron, etc.) contained in raw water such as groundwater with filter media to produce treated water is provided. (For example, see Patent Documents 1 and 2).
The filter medium of such a filtration apparatus gradually decreases in filtration performance as the amount of suspended substances captured increases. Therefore, the filtration performance of the filtration apparatus is recovered by periodically washing (back washing and washing) the filter medium using washing water (raw water or treated water). When such washing is performed a plurality of times a day, the same amount of washing water is used at the same time regardless of the degree of decrease in filtration performance. In addition, when the filter medium is washed, it is necessary to secure a water stop time for temporarily stopping the production of the treated water.

Japanese Patent Laid-Open No. 62-191014 JP 2003-190973 A

By the way, the usage mode of the treated water by the user is various, and the accumulated usage amount per unit time of the treated water often varies (increases / decreases) in one day.
However, in the water treatment system described in Patent Document 1, when the washing is performed a plurality of times a day, the washing is performed uniformly with the same amount of washing water at the same time regardless of the degree of decrease in the filtration performance. For this reason, if cleaning with less necessity is uniformly performed during a time period when the accumulated amount of treated water used by the user is large, the user has to secure more water stoppage time.
Further, even if the filter medium is washed when the filtration performance is not so much lowered, the filtration performance cannot be recovered effectively, and excessive washing water is used, resulting in a waste of water resources.

  An object of the present invention is to provide a water treatment system capable of reducing the water stoppage time of a user and effectively recovering the filtration performance of an overtreatment device while effectively using water resources. And

The present invention includes a filtration device that captures suspended substances contained in raw water with a filter medium to produce treated water, and supplies cleaning water to the filter medium to backwash the filter medium, and the trapped suspension. Backwashing means for discharging the turbid substance out of the system together with the washing water, and water washing for supplying rinsing water to the filter medium in order to rinse the backwashed filter medium and discharging the rinse water rinsed out of the filter medium out of the system Means, a treated water usage detecting means for detecting an accumulated usage per unit time of the treated water, and an accumulated usage per unit time of the treated water detected by the treated water usage detecting means is equal to or less than a predetermined value. and time input means for setting the input operation process water usage reduction time zone drops, conducted in the treated water consumption decreases the time zone set by the time zone input unit, and vice by the backwash means Washing process and the water hand A short cleaning time of the cleaning operation consisting of washing process by washing time input means for setting the input operation short short cleaning time than standard washing time cleaning operation is performed in the time the treated water is not used band A cleaning operation based on the time information measuring means for measuring the time information, the treated water use reduction time zone set by the time zone input means, and the time information measured by the time information measuring means. Cleaning operation execution time determination means for determining whether or not it is time to perform the cleaning operation, and the short-term cleaning set by the cleaning time input means at the cleaning operation execution time determined by the cleaning operation execution time determination means The present invention relates to a water treatment system including a cleaning operation execution control unit that performs a cleaning operation based on time.

Also, the short-term cleaning time set by the washing time input unit, by rinsing time in the backwash time and the washing step in the backwashing step is set individually, is preferably set.

Further, the present invention provides a filtration apparatus for producing treated water by capturing suspended substances contained in raw water with a filter medium, and supplying the washing water to the filter medium to backwash the filter medium and captured. Backwashing means for discharging the suspended substance out of the system together with washing water, and supplying rinsing water to the filter medium in order to rinse the backwashed filter medium, and discharging the rinse water rinsed out of the filter medium out of the system Washing water means for treating, treated water usage detecting means for detecting the accumulated usage amount of treated water per unit time, time information measuring means for measuring time information, and treated water detected by the treated water usage detecting means Treated water usage information storage means for storing treated water usage information including the accumulated usage amount per unit time and the time information measured by the time information measuring means, and the treatment stored in the treated water usage information storage means Based on water usage information Then, a treated water usage reduction time zone learning means for learning a time zone during which the usage amount of treated water falls below a predetermined value as a treated water usage reduction time zone, and the treated water usage reduction time zone learning means, A learning period input means for inputting a learning period to be learned, a learning period determination means for determining whether or not the learning period input from the learning period input means has passed, and the treated water usage reduction time zone learning A cleaning operation comprising a back cleaning step by the back cleaning unit and a water washing step by the water cleaning unit based on the treated water use amount decrease time zone learned by the unit and the time information measured by the time information measuring unit Cleaning operation execution time determination means for determining whether or not it is time to perform the treatment, and based on the accumulated usage amount per unit time of the treated water detected by the treated water usage amount detection means , A wash time duration setting means for setting a short short cleaning time than standard washing time cleaning operation is performed in a time zone where treated water is not used, the implementation of the determined cleaning operation by the cleaning operation carried timing determining means The present invention relates to a water treatment system comprising: a cleaning operation execution control unit that performs a cleaning operation based on the short-term cleaning time set by the cleaning time setting unit at a time.

Also, the short-term cleaning time set by the wash time duration setting means, by washing time in the backwash time and the washing step in the backwashing step is set individually, it is preferably set.

  According to the present invention, it is possible to provide a water treatment system that can reduce the water stoppage time of a user and can effectively recover the filtration performance of an overtreatment device while effectively using water resources. Can do.

It is a lineblock diagram showing water treatment system 1 of a 1st embodiment. It is a functional block diagram concerning control of water treatment system 1 of a 1st embodiment. (A) is a figure which shows the time change of the integrated usage-amount for every unit time of the treated water W2 in the water treatment system 1, (b) is a figure which shows the time change of the filtration performance level of the filtration apparatus 4. FIG. is there. It is a flowchart which shows control of the water treatment system 1 of 1st Embodiment. It is a block diagram which shows 1A of water treatment systems of 2nd Embodiment. It is a functional block diagram concerning control of water treatment system 1A of a 2nd embodiment. It is a flowchart which shows the control which learns the treated water usage-amount fall time slot | zone of 1 A of water treatment systems of 2nd Embodiment. It is a flowchart which shows the control which implements washing operation of water treatment system 1A of a 2nd embodiment.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Drawing 1 is a lineblock diagram showing water treatment system 1 of a 1st embodiment of the present invention. Drawing 2 is a functional block diagram concerning control of water treatment system 1 of a 1st embodiment.

As shown in FIG. 1, the water treatment system 1 according to the first embodiment of the present invention includes a raw water line L1 through which raw water W1 such as groundwater circulates, a raw water pump 2, a raw water valve 3, and a suspension included in the raw water W1. Filtration apparatus 4 that captures turbidity with a filter medium (not shown) to produce treated water W2, treated water line L2 through which treated water W2 circulates, water supply valve 7, and treated water that stores treated water W2 Tank 8, treated water distribution line L3, treated water distribution pump 9, backwash water supply line L5, backwash water supply pump 15, backwash valve 16, drain line L4, backup water supply line Lb The chemical addition device 11, the treated water quality meter 18, the flow meter 19 as treated water usage detection means, the control device 30, the time zone input unit 20 as time zone input means, and the washing time input means As cleaning time input It is configured with 21, and the principal.
In addition, the “line” in this specification is a general term for a line capable of flowing a fluid such as a flow path, a path, and a pipeline.

  The upstream end of the raw water line L1 is connected to a supply source (not shown) of the raw water W1. The downstream end of the raw water line L1 is connected to the filtration device 4 (a control valve 6 described later). The raw water pump 2 is provided in the raw water line L1. The raw water pump 2 sends raw water W1 such as groundwater to the filtration device 4. Operation (drive and stop) of the raw water pump 2 is controlled by a control device 30 (described later). The raw water valve 3 is provided in the raw water line L1, and opens and closes the raw water line L1. Opening and closing of the raw water valve 3 is controlled by a control device 30 (described later).

  The raw water line L1, the raw water pump 2, and the raw water valve 3 also function as rinsing means for rinsing the backwashed filter medium 4 of the filtration apparatus 4 with the raw water W1 and discharging the raw water W1 rinsed with the filter medium out of the system.

The raw water line L1 is configured such that a predetermined drug is added by the drug adding device 11 at the addition point J1. A backwash water supply line L5 (described later) is joined to the junction J3 of the raw water line L1.
The drug addition device 11 adds a predetermined drug in order to remove suspended substances in the downstream filtration processing device 4 (described later). The drug is a flocculant or an oxidizing agent, and is appropriately selected according to the filtration method of the filtration apparatus 4. Details of the drug will be described later.

  The drug addition device 11 includes a drug storage unit 11a and a drug addition pump 11b. The medicine storage unit 11a stores a medicine. The chemical addition pump 11b sends the chemical stored in the chemical reservoir 11a to the raw water W1 and adds it at the addition point J1 of the raw water line L1. The operation (drive and stop) of the medicine addition pump 11b is controlled by a control device 30 (described later).

  The filtration device 4 is provided at the downstream end of the raw water line L1, and produces treated water W2 by capturing suspended substances contained in the raw water W1 with a filter medium (not shown). The filtration apparatus 4 includes a filtration tower 5 having a filter medium, a control valve 6 as a reverse cleaning means, and a drain line L4 so that the filter medium can be periodically cleaned (reverse cleaning process and water cleaning process are performed). It is configured.

  That is, at the time of the back washing process, the washing water is supplied to the filter medium via the back washing water supply line L5 (described later) (in this embodiment, it is treated water W2. Hereinafter, it may be referred to as “back washing water” as appropriate). Is supplied, and suspended substances captured by the filter medium are discharged out of the system together with the washing water. In the water washing step, in order to rinse the back-washed filter medium, rinse water (raw water W1 in this embodiment) is supplied to the filter medium, and the rinse water rinsed with the filter medium is discharged out of the system. Yes.

  The filter tower 5 has a filter medium (not shown) for filtering suspended substances. The control valve 6 controls the flow path of water (raw water W1, treated water W2, backwash water or rinsing water at the time of cleaning the filter medium) flowing into or out of the filter tower 5. The control valve 6 is controlled to be opened and closed by a control device 30 (described later). The control valve 6 functions as a reverse cleaning means and a water washing means. The drainage line L4 is connected to the control valve 6 and discharges backwash water (treated water W2) at the time of washing the filter medium, which will be described later, rinse water (raw water W1) at the time of washing the filter medium, and the like. The drain line L4 functions as a reverse cleaning means and a water washing means.

  The filtration device 4 is configured to be backwashable by the treated water W2 (backwash water) supplied from the treated water tank 8 via the backwash water supply line L5. The backwash water supply line L5 has an upstream end connected to the treated water tank 8, and a downstream end joined the junction J3 of the raw water line L1.

  The backwash water supply line L5 is provided with a backwash water supply pump 15 as backwashing means for sending backwash water and a backwash valve 16 as backwashing means for opening and closing the backwash water supply line L5. It has been. The backwash water supply pump 15 is connected to a control device 30 (described later), and the operation (drive and stop) is controlled by the control device 30. The backwash valve 16 is connected to a control device 30 (described later), and its opening and closing is controlled by the control device 30.

  The filtration device 4 is variously selected according to the substance to be removed in the raw water W1. Examples of the filtration processing device 4 include the following sand filtration device, iron removal manganese removal device, and activated carbon filtration device. All of these apparatuses can capture and remove suspended substances contained in the raw water W1 by the sieving effect of the filter medium.

  The sand filtration device captures and removes suspended substances such as fine particles contained in the raw water W1 with a filter medium (not shown). Examples of the sand filtration device include a tower type having a filter medium layer (not shown) formed from a coarse filter medium such as meteorite and a fine filter medium such as anthracite and filter sand. When a sand filtration device is used as the filtration processing device 4, it is necessary to make the suspended substances contained in the raw water W1 coagulate (floc) and easily remove them. Therefore, a flocculant is added by the chemical | medical agent addition apparatus 11 arrange | positioned in the upstream of a filtration tower. As the flocculant, for example, an inorganic flocculant can be used, and specific examples include polyaluminum chloride (PAC) and aluminum sulfate.

  The iron removal manganese removal apparatus captures and removes dissolved iron and dissolved manganese together with suspended substances such as fine particles contained in the raw water W1 with a filter medium (not shown), and a filtration tower packed with the filter medium. It has. Usually, particulate manganese chamotte or manganese zeolite is used for the filter medium. Moreover, when an iron removal manganese removal apparatus is used as the filtration processing apparatus 4, it removes, after oxidizing the dissolved iron and dissolved manganese contained in raw | natural water W1. Therefore, an oxidizing agent (for example, sodium hypochlorite) is added by the chemical | medical agent addition apparatus 11 arrange | positioned in the upstream of a filtration tower.

  Specifically, the dissolved iron contained in the raw water W1 is oxidized by the action of the oxidant, and is converted into ferric hydroxide through insoluble ferrous hydroxide (that is, suspended into a substance). Filtered by the filter medium. When the dissolved manganese contained in the raw water W1 comes into contact with the filter medium by the action of the oxidizing agent, the oxidation proceeds and is adsorbed and removed by the filter medium.

The activated carbon filter removes impurities such as organic substances, chromaticity components, and odor components together with suspended substances contained in the raw water W1 with a filter medium made of an adsorbent, and includes a filter tower filled with the adsorbent. ing. Usually, particulate or fibrous activated carbon is used as the adsorbent.
The activated carbon filtration device may be used in combination with the sand filtration device and / or the iron removal manganese removal device. In that case, it is preferable to arrange the activated carbon filtration device on the downstream side of the sand filtration device and / or the iron removal manganese removal device. This is because, for example, residual chlorine derived from the oxidizing agent that has passed through the iron removal manganese removal apparatus can be decomposed by the activated carbon filtration apparatus by arranging in this way.

A treated water line L2 is connected to the filtration processing device 4 configured as described above.
Next, components related to the treated water line L2 and the treated water line L2 will be described. The upstream end of the treated water line L2 is connected to the filtration device 4 (control valve 6). The downstream end of the treated water line L2 is connected to the treated water tank 8. In the treated water line L2, treated water W2 produced by the filtration device 4 flows.
A water supply valve 7 is provided in the treated water line L2. The water supply valve 7 opens and closes the treated water line L2. The water supply valve 7 is connected to a control device 30 (described later), and the opening and closing of the water supply valve 7 is controlled by the control device 30.

  In addition, a treated water quality meter 18 is connected to the treated water line L2 at a measurement point J5. The treated water quality meter 18 measures the quality (for example, turbidity or chromaticity) of the treated water W2 flowing through the treated water line L2. The treated water quality meter 18 is connected to a control device 30 (described later). The signal measured by the treated water quality meter 18 is input to the control device 30, and the control device 30 determines the quality of the treated water W2.

  Moreover, the flowmeter 19 is connected to the treated water line L2 at the measurement point J6. The flow meter 19 measures the integrated flow rate of the treated water W2 flowing through the treated water line L2. That is, the flow meter 19 functions as a treated water usage detection unit that detects an integrated usage of the treated water W2 per unit time by the system maintenance manager. The flow meter 19 is connected to a control device 30 (described later). The signal measured by the flow meter 19 is input to the control device 30, and the control device 30 calculates the integrated flow rate of the treated water W2 per unit time, and the history is stored in the memory unit 45 described later. It is like that. In addition, the flow meter 19 can also be provided in the treated water distribution line L3 mentioned later.

The treated water tank 8 is connected to the downstream end of the treated water line L2 and stores treated water W2 introduced through the treated water line L2.
The treated water tank 8 includes a water level gauge 8a. The water level meter 8a measures the water level of the treated water W2 stored in the treated water tank 8. The water level gauge 8a is connected to a control device 30 (described later). The signal measured by the water level gauge 8a is input to the control device 30, and the control device 30 calculates the water level of the treated water tank 8.

  In the filtration apparatus 4 of this embodiment, when the distribution of the treated water W2 is requested, the treated water distribution pump 9 described later is operated, and the treated water W2 in the treated water tank 8 is distributed to the demand location. For this reason, the water level gauge 8a detects a decrease in water and full water in the treated water tank 8 to determine the feed start timing and feed stop timing of the treated water W2 (that is, drive and stop timing of the raw water pump 2) during the filtration process. be able to.

  Further, a backup water supply line Lb is connected to the treated water tank 8. The backup water supply line Lb is used to treat water and clean water produced by a separate water treatment system or the like when the amount of treated water W2 stored in the treated water tank 8 is insufficient with respect to the demand for the treated water W2. This is for supplying the backup water Wb made up of or the like to the treated water tank 8.

  A backup water supply valve 26 is provided in the backup water supply line Lb. The backup water supply valve 26 opens and closes the backup water supply line Lb. The backup water supply valve 26 is connected to a control device 30 (described later), and the opening and closing of the backup water supply valve 26 is controlled by the control device 30.

The treated water distribution line L3 is configured to allow the treated water W2 to flow. The upstream end of the treated water distribution line L3 is connected to the treated water tank 8. The downstream end of the treated water distribution line L3 is connected to the demand point of the treated water W2. As described above, the flow meter 19 can be provided in the treated water distribution line L3 instead of the treated water line L2.
A treated water distribution pump 9 is provided in the treated water distribution line L3. The treated water distribution pump 9 sends treated water W2 from the treated water tank 8 to a downstream demand point. The treated water distribution pump 9 is connected to a control device 30 (described later), and the operation (drive and stop) is controlled by the control device 30.

The time zone input unit 20 sets a time zone (time information) in which the accumulated usage amount of the treated water detected by the flow meter 19 per unit time decreases to a predetermined value or less by an input operation. Here, the “predetermined value” is a threshold value of the usage amount of the treated water W2 that can minimize the water stopping time of the treated water W2. Specifically, the predetermined value is preferably a lower limit value of the usage amount of the treated water W2. Moreover, it is preferable that the time zone to be input is after satisfying this threshold condition and after the filtration performance of the filtration apparatus 4 has deteriorated to some extent. This is for avoiding a cleaning operation with little necessity.
The time zone input unit 20 is, for example, a keyboard (not shown) connected to the control device 30.

The cleaning time input unit 21 sets the cleaning time of the cleaning operation performed in the time zone (time information) set by the time zone input unit 20 by an input operation. At this time, as the cleaning time, a back cleaning time and a water cleaning time shorter than a predetermined standard cleaning time (standard time) are individually set. Specific examples of setting the reverse cleaning time and the water cleaning time will be described later.
The cleaning time input unit 21 is, for example, a keyboard (not shown) connected to the control device 30.

Next, with reference to FIG. 2, the function which concerns on control of the water treatment system 1 of 1st Embodiment is demonstrated. Drawing 2 is a functional block diagram concerning control of water treatment system 1 of a 1st embodiment.
The control apparatus 30 controls each part in the water treatment system 1 of 1st Embodiment. As shown in FIG. 2, the control device 30 includes, for example, the raw water pump 2, the treated water distribution pump 9, the chemical addition pump 11b, the backwash water supply pump 15, the raw water valve 3, the control valve 6, the water supply valve 7, and the backwash. It is electrically connected to the valve 16 and the backup water supply valve 26.

  The control device 30 is electrically connected to the time zone input unit 20, the cleaning time input unit 21, and each measurement device in the water treatment system 1, and the time zone setting information input from the time zone input unit 20, the cleaning The setting information of the cleaning time input from the time input unit 21 and the measurement information measured by each measuring device are received. The measuring device is, for example, a flow meter 19, a water level meter 8a, and a treated water quality meter 18.

  The control device 30 includes a control unit 31 and a memory unit 45. The control unit 31 includes a time information measurement unit 32, a cleaning operation execution time determination unit 33, and a cleaning operation execution control unit 35.

The time information measuring unit 32 is a clock unit that measures time information such as the current date and time.
Based on the time zone (time) information set by the time zone input unit 20 and the time information measured by the time information measurement unit 32, the cleaning operation execution time determination unit 33 has reached the time to perform the cleaning operation. Determine whether or not.

  The cleaning operation execution control unit 35 performs the reverse cleaning process and the water cleaning process based on the reverse cleaning time and the water washing time set by the cleaning time input unit 21 at the cleaning operation execution time determined by the cleaning operation execution time determination unit 33. To implement. Specifically, when performing the reverse cleaning process, the cleaning operation execution control unit 35 switches the control valve 6 to the flow path setting for the reverse cleaning process, and closes the raw water valve 3 and the water supply valve 7. Then, the backwash valve 16 is opened. Then, the backwash water supply pump 15 is operated for the set backwash time and then stopped.

  When performing the water washing process, the washing operation execution control unit 35 switches the control valve 6 to a flow path setting for the water washing process, and closes the backwash valve 16 with the water supply valve 7 closed. The raw water valve 3 is opened. Then, the raw water pump 2 is operated for the set washing time and then stopped.

  The memory unit 45 stores a control program and various data necessary for controlling the water treatment system 1. Specifically, the memory unit 45 is input from the control program for operating various functions necessary for control of the water treatment system 1, time zone setting information input from the time zone input unit 20, and the cleaning time input unit 21. Cleaning time setting information, various measurement data measured by each of the measuring devices (for example, accumulated usage data per unit time of the treated water W2 detected by the flow meter 19, water quality data by the treated water quality meter 18) Etc.), various threshold values (for example, the lower limit threshold value of the usage amount of the treated water W2) and the like are stored.

  Next, the basic operation of the water treatment system 1 of the first embodiment will be described with reference to FIG. In the case of a filtration process during normal operation, the control valve 6 of the filtration apparatus 4 is set as a flow path for the filtration process. When there is a distribution request for the treated water W2, the treated water distribution pump 9 is operated by the control device 30, whereby the treated water W2 stored in the treated water tank 8 is sent to the downstream demand point (distribution start). ). When the water level gauge 8a detects a decrease in the treated water tank 8, the control device 30 activates the raw water pump 2 and the chemical addition pump 11b in the raw water line L1, and opens the raw water valve 3. Further, the control device 30 opens the water supply valve 7 of the treated water line L2. In this case, the backwash water supply pump 15 in the backwash water supply line L5 is not operated, and the backwash valve 16 remains closed.

The raw water W1 is supplied to the raw water line L1 by the raw water pump 2. Then, a predetermined drug is added by the drug adding device 11 at the addition point J1.
The raw water W1 to which the chemical has been added is introduced into the filtration tower 5 through the control valve 6 of the filtration processing device 4. In the filtration tower 5, the raw water W1 is caused to flow so as to descend with respect to the filter medium layer. Thereby, the suspended substance contained in the raw water W1 is captured by the filter medium, and the treated water W2 is produced. The manufactured treated water W2 is circulated to the treated water line L2 via the control valve 6 and stored in the treated water tank 8.

In the treated water line L2, the quality of the treated water W2 is measured by the treated water quality meter 18, and the integrated flow rate of the treated water W2 is measured by the flow meter 19. These pieces of measurement information are received by the control device 30.
When the distribution request for the treated water W2 disappears, the treated water distribution pump 9 is stopped by the control device 30 (distribution stop). Subsequently, when the water level gauge 8a detects that the treated water tank 8 is full, the control device 30 stops the raw water pump 2 and the chemical addition pump 11b in the raw water line L1, and closes the raw water valve 3. . Further, the control device 30 closes the water supply valve 7 of the treated water line L2.

  When the control device 30 determines that the water level of the treated water W2 in the treated water tank 8 has reached a predetermined lower limit value, the control device 30 opens the backup water supply valve 26 of the backup water supply line Lb. Is done. Thereby, the backup water Wb is supplied to the treated water tank 8.

Next, the washing operation (back washing process and water washing process) of the filtration apparatus 4 will be described.
During the reverse cleaning process, the control device 30 (cleaning operation execution control unit 35) stops the raw water pump 2 in the raw water line L1, closes the raw water valve 3, and controls the control valve 6 of the filtration device 4. The flow path is set for the reverse cleaning process. Further, the control device 30 closes the water supply valve 7 of the treated water line L2, operates the backwash water supply pump 15 in the backwash water supply line L5, and opens the backwash valve 16. Thereby, in the filtration tower 5, the treated water W2 is flowed so as to rise with respect to the filter medium layer, and the filter medium is developed. The backwash water after washing is discharged out of the system through the drain line L4. This reverse cleaning process is performed based on a reverse cleaning time (described later) set by an input operation from the cleaning time input unit 21.

  Further, during the water washing process, the control device 30 (cleaning operation execution control unit 35) operates the raw water pump 2 in the raw water line L1, opens the raw water valve 3, and controls the control valve 6 of the filtration device 4. Is set in the flow path for the water washing step. Further, the control device 30 maintains the water supply valve 7 of the treated water line L2 in the closed state, the backwash water supply pump 15 in the backwash water supply line L5 is stopped, and the backwash valve 16 is closed. The Thereby, in the filtration tower 5, the raw water W1 as rinsing water is caused to flow downward with respect to the filter medium layer, and the filter medium is rinsed. The rinsing water after the water washing is discharged out of the system through the drain line L4. This water washing step is performed based on a water washing time (described later) set by an input operation from the washing time input unit 21.

  After the cleaning operation by the control device 30 (cleaning operation execution control unit 35) is completed, the normal operation mode is restored. That is, the process returns to the filtration step to produce the treated water W2, the raw water valve 3 and the water supply valve 7 are opened, and the raw water pump 2 and the like are operated.

  Next, the implementation timing of the cleaning operation in the water treatment system 1 of the first embodiment will be described with reference to FIG. FIG. 3A is a diagram showing a time change of the accumulated usage amount of the treated water W2 per unit time in the water treatment system 1, and FIG. 3B is a time change of the filtration performance level of the filtration treatment device 4. FIG. Fig.3 (a) and FIG.3 (b) have shown the usage example of the water treatment system 1 in one day.

  In FIG. 3A, the vertical axis indicates the accumulated usage amount of the treated water W2 in the water treatment system 1 per unit time (for example, every hour), and the horizontal axis operates the water treatment system 1. Indicates the elapsed time (time). In FIG. 3B, the vertical axis represents the filtration performance level of the filtration apparatus 4, and the horizontal axis represents the passage of time (time) when the water treatment system 1 is operated. In addition, the filtration performance level in the vertical axis | shaft of FIG.3 (b) can be shown as a relative value of the turbidity of the treated water W2, for example.

  Moreover, in FIG.3 (b), the curve 101 shows the time change of the filtration performance level of the filtration processing apparatus 4 when the water quality of the raw | natural water W1 is normal and the conventional periodic washing operation is implemented. . A curve 102 and a curve 103 indicate a time change of the filtration performance level of the filtration apparatus 4 when the quality of the raw water W1 is deteriorated and when the characteristic cleaning operation of the present embodiment is performed. The water quality of the raw water W1 is, for example, turbidity.

  In the example shown in FIG. 3, in the time zone from 3 o'clock to 5 o'clock and the time zone from 12 o'clock to 17 o'clock, the integrated usage amount of the treated water W2 per unit time is larger than in other time zones. On the other hand, in the time zone from 6 o'clock to 8 o'clock, the integrated usage amount of the treated water W2 per unit time is smaller than in other time zones.

  Next, characteristic control of the water treatment system 1 of the first embodiment will be described with reference to FIG. FIG. 4 is a flowchart showing control of the water treatment system 1 of the first embodiment. In the present embodiment, the cleaning operation is performed once in a time zone in which the accumulated usage amount of the treated water W2 is small per unit time in a time shorter than the normal time.

  As shown in FIG. 4, in step ST1, the flow meter 19 detects the integrated usage amount of the treated water W2 per unit time. The control device 30 receives this accumulated usage data and stores it in the memory unit 45.

  In step ST2, the system maintenance administrator refers to the accumulated usage amount data of the treated water W2 stored in the memory unit 45, and is a time zone in which the accumulated usage amount of the treated water W2 is small (for example, FIG. 3A). The time zone between 6 o'clock and 8 o'clock shown in FIG. When a predetermined time zone is input, an intermediate time (for example, 7 o'clock) of the time zone is set as a time (time) for performing the cleaning operation.

  In step ST3, the system maintenance manager inputs a reverse cleaning time and a water cleaning time shorter than a predetermined standard cleaning time (standard time) to the control device 30 through the cleaning time input unit 21 (see FIG. 2). Here, for example, as a breakdown of the standard time (water stoppage time is 30 minutes) when the washing operation is performed at night when the factory is not operating (for example, 22:00 shown in FIG. 3), the reverse washing time and the water washing are performed. Let each time be 15 minutes.

  In such a case, the system maintenance manager individually sets, for example, a reverse cleaning time of 7 minutes and a water cleaning time of 10 minutes with respect to the standard cleaning time. That is, the total cleaning time is set to 17 minutes. Therefore, the water stop time can be made 13 minutes shorter than the standard water stop time. In addition, since the water stop time can be shortened (reduced), the amount of cleaning water (raw water W1 and treated water W2) used can be reduced. In addition, since the back washing time and the water washing time can be individually set, the back washing time and the water washing time can be arbitrarily set according to the degree of deterioration of the filtration performance, and a fine washing operation is performed. be able to.

  In step ST4, the time information measuring unit 32 measures the current time information, and proceeds to step ST5.

  In step ST <b> 5, the cleaning operation execution time determination unit 33 presents the current time based on the time zone (time) information input from the time zone input unit 20 and the time information (current time) measured by the time information measurement unit 32. It is determined whether or not the current time is within the input time zone. That is, the cleaning operation execution time determination unit 33 determines whether or not the current time has reached the time for performing the cleaning operation (for example, the time corresponding to 7 o'clock in FIG. 3A).

When it is time to execute the cleaning operation (YES) (when the current time is 7 o'clock in FIG. 3A), the process proceeds to step ST3.
On the other hand, when it is not time to perform the cleaning operation (NO) (in FIG. 3A, a time corresponding to before 7 o'clock), the process returns to step ST4 and continues until the time for performing the cleaning operation is reached. The processes of ST4 and step ST5 are repeated.

  In step ST6, the cleaning operation execution control unit 35 performs the reverse cleaning process at, for example, 7 o'clock shown in FIG. 3A based on the reverse cleaning time set in step ST3. Subsequently, the cleaning operation execution control unit 35 performs a water washing process based on the water washing time set in step ST3.

  In this way, the cleaning time is set short and the cleaning operation is simply performed. Therefore, although it is difficult to completely recover the filtration performance of the filtration apparatus 4, the filtration performance can be restored to such an extent that the quality of the treated water W2 does not deteriorate.

  Specifically, if the simple cleaning operation is not performed, for example, as shown by the curve 102 in FIG. 3B, when the quality of the raw water W1 deteriorates, after 7 o'clock, the time elapses. There is a possibility that the filtration performance deteriorates rapidly (see the two-dot chain line). Therefore, there is a possibility that the water quality of the treated water W2 deteriorates rapidly or the filter medium is completely clogged.

  On the other hand, even when the water quality of the raw water W1 deteriorates, the filtration performance level is temporarily set as shown by the curve 103 in FIG. Can be recovered. The filtration performance level after recovery gradually deteriorates with the passage of time thereafter. In other words, the filtration performance level gradually deteriorates through the steady state, almost like the curve 101 when the quality of the raw water W1 is normal. For example, at 22:00 at night when the factory or the like is not operating, the filtration performance of the filtration apparatus 4 can be completely recovered by performing a washing operation with a standard washing time.

  In step ST6, after the cleaning operation is performed by the cleaning operation execution control unit 35, the control is terminated and the operation mode returns to the normal water treatment mode. That is, the process returns to the filtration step to produce the treated water W2.

According to the water treatment system 1 of 1st Embodiment demonstrated above, each effect shown below is show | played.
The water treatment system 1 of the first embodiment includes a filtration device 4 having a control valve 6 as a backwashing means and a waterwashing means, a backwashing water supply line L5, a backwashing water supply pump 15 as a backwashing means, The washing valve 16 and the drain line L4, the raw water line L1, the raw water pump 2, the raw water valve 3 and the drain line L4 as washing means, the flow meter 19 as the treated water usage detecting means, and the treated water usage detecting means A time zone input unit 20 for setting a time zone in which the accumulated usage amount of the detected treated water per unit time falls below a predetermined value by an input operation, and a cleaning time shorter than a standard cleaning time in the cleaning operation are input. It is determined by the cleaning time input unit 21, the time information measurement unit 32, the cleaning operation execution time determination unit 33, and the cleaning operation execution time determination unit 33 set by operation. The implementation period of the purification operation, comprises a cleaning operation carried out controller 35 for a cleaning operation based on the washing time set by the cleaning time input section 21.

  Therefore, the cleaning operation can be performed in a time shorter than the predetermined standard time in a time zone where the accumulated usage amount of the treated water W2 input by the time zone input unit 20 is small per unit time. Therefore, by simply performing the washing operation in a time zone when the accumulated usage amount of the treated water W2 is small, it is possible to reduce the water stoppage time of the user, and to the extent that the water quality of the treated water W2 is not deteriorated. Performance can be restored. In other words, the filtration performance can be maintained (life extension) as much as possible during the day of use of the filtration device 4, and the filtration performance can be effectively recovered.

  Moreover, the usage-amount of washing water (raw water W1 and the treated water W2) can be decreased by shortening washing | cleaning time according to the usage condition of the treated water W2 by a user. Therefore, water resources can be used effectively.

  In the water treatment system 1 of the first embodiment, the back washing time of the filter medium by the back washing means and the water washing time of the filter medium by the water washing means can be individually set by the washing time input unit 21. Therefore, the back washing time and the water washing time can be arbitrarily set according to the degree of decrease in filtration performance, and a fine washing operation can be performed.

  Next, another embodiment of the present invention will be described. The other embodiments will be described mainly with respect to points different from the control method of the first embodiment. The same reference numerals are given to the same configurations as those of the first embodiment, and detailed descriptions thereof will be omitted. For the points not specifically described in other embodiments, the description of the first embodiment is appropriately applied or incorporated.

[Second Embodiment]
Next, the configuration of the water treatment system 1A according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a configuration diagram illustrating a water treatment system 1A according to the second embodiment. FIG. 6 is a functional block diagram relating to the control of the water treatment system 1A of the second embodiment.

  As shown in FIG. 5, the water treatment system 1A of the second embodiment of the present invention includes a raw water line L1, a raw water pump 2, a raw water valve 3, a filtration treatment device 4, a treated water line L2, and a water supply valve. 7, treated water tank 8, treated water distribution line L3, treated water distribution pump 9, backwash water supply line L5, backwash water supply pump 15, backwash valve 16 and drainage line L4 as backwashing means. And a backup water supply line Lb, a chemical addition device 11, a treated water quality meter 18, a flow meter 19 as a treated water usage detecting means, a control device 30A, and a learning period input unit 50. It is configured.

In the water treatment system 1 of the first embodiment described above, the time period during which the accumulated usage amount of the treated water W2 per unit time falls below a predetermined value is from the time zone input unit 20 (see FIG. 1) to the maintenance manager. Was configured to be entered by. In contrast, in the water treatment system 1A of the second embodiment, the time zone is automatically learned for a certain period by the control device 30A (see FIGS. 5 and 6), and the learned value is input. It is configured.
Moreover, in the water treatment system 1 of 1st Embodiment, it is comprised so that the cleaning time of the washing | cleaning operation | movement which consists of a reverse washing process and a water washing process may be input by the maintenance manager from the washing time input part 21 (refer FIG. 1). It had been. On the other hand, in the water treatment system 1A of the second embodiment, the cleaning time is automatically set by the control device 30A (see FIGS. 5 and 6).

  Therefore, as shown in FIG. 5, the configuration of the water treatment system 1A of the second embodiment is substantially the same as the configuration of the water treatment system 1 of the first embodiment. The main difference is that the water treatment system 1A of the second embodiment includes a learning period input unit 50 instead of the time zone input unit 20, and a control device 30A (see FIG. 6) instead of the control device 30. It is a point to prepare. Therefore, this difference will be mainly described below.

  As illustrated in FIG. 5, the learning period input unit 50 inputs a learning period in which the control device 30 </ b> A (a treated water usage decrease time zone learning unit 36 described later) should learn a treated water usage decreased time period (described later). To do. The learning period input unit 50 is, for example, a keyboard (not shown) provided on a control panel (not shown) of the water treatment system 1A.

  Next, with reference to FIG. 6, the function which concerns on control of the water treatment system 1A of 2nd Embodiment is demonstrated. As shown in FIG. 6, the control device 30A controls each part in the water treatment system 1A of the second embodiment. The control device 30A includes a control unit 31A and a memory unit 45.

  The control unit 31A includes a time information measurement unit 32 as a time information measurement unit, a cleaning operation execution time determination unit 33 as a cleaning operation execution time determination unit, a cleaning time setting unit 34 as a cleaning time setting unit, and a cleaning operation. A cleaning operation execution control unit 35 as an execution control unit, a treated water usage decrease time zone learning unit 36 as a treated water usage reduction time zone learning unit, and a learning period determination unit 37 as a learning period determination unit Prepare.

The time information measuring unit 32 is a clock unit that measures time information such as the current date and time.
The cleaning operation execution time determination unit 33 uses the treated water usage reduction time zone learning unit 36 (described later) learned by the treated water usage reduction time zone (described later) and the time information measured by the time information measurement unit 32. Based on this, it is determined whether or not it is time to perform the cleaning operation.

The cleaning time setting unit 34 sets a reverse cleaning time and a water cleaning time shorter than a predetermined standard cleaning time (standard time) based on the accumulated usage amount per unit time of the treated water W2 detected by the flow meter 19. .
The cleaning operation execution control unit 35 reads the data of the treated water usage reduction time zone learned by the treated water usage reduction time zone learning unit 36 and stored in the treated water usage information storage unit 46 (described later). In addition, the cleaning operation execution control unit 35 performs the reverse cleaning step and the water washing step based on the reverse cleaning time and the water washing time set by the cleaning time setting unit 34 in the treated water usage amount reduction time zone.

  Based on the treated water usage information stored in the treated water usage information storage unit 46 (described later), the treated water usage reduction time zone learning unit 36 reduces the accumulated usage amount of the treated water W2 per unit time to a predetermined value or less. The time period for decreasing is learned as the time period for decreasing the amount of treated water used. Here, the “predetermined value” is a threshold value of the usage amount of the treated water W2 that can minimize the water stopping time of the treated water W2. Specifically, the predetermined value is preferably a lower limit value of the usage amount of the treated water W2.

  Based on the learning period (for example, one week) input from the learning period input unit 50 and the time information measured by the time information measuring unit 32, the learning period determination unit 37 learns the amount of processing water usage decreased. It is determined whether the period (learning period) for which the part 36 should learn has passed.

  The memory unit 45 stores a control program and various data necessary for controlling the water treatment system 1A. The memory unit 45 stores the learning period (set value) input from the learning period input unit 50. The memory unit 45 includes a treated water usage information storage unit 46 as treated water usage information storage means.

  The treated water usage information storage unit 46 stores treated water usage information including the accumulated usage amount of the treated water W2 detected by the flow meter 19 per unit time and the time information measured by the time information measuring unit 32. This treated water usage information is used by the treated water usage reduction time zone learning unit 36. Further, the treated water usage information storage unit 46 stores data of the treated water usage amount decrease time zone learned by the treated water usage amount decrease time zone learning unit 36.

  Next, characteristic control of the water treatment system 1A of the second embodiment will be described with reference to FIGS. FIG. 7 is a flowchart showing control for learning the treated water usage decrease time zone of the water treatment system 1A of the second embodiment. FIG. 8 is a flowchart showing the control for performing the cleaning operation of the water treatment system 1A of the second embodiment.

  In the control of the water treatment system 1A of the second embodiment, the cleaning operation is performed in the learning mode (see FIG. 7) for learning the treated water usage reduction time zone and the treated water usage reduction time zone obtained by this learning mode. The cleaning operation execution mode is performed once (see FIG. 8).

  First, the learning mode will be described with reference to FIG. As shown in FIG. 7, in step ST <b> 11, the user inputs a period (learning period) during which the treated water use amount decrease time zone is learned by the learning period input unit 50 (see FIGS. 5 and 6). When the learning period is input, the process proceeds to step ST12. For example, when the system maintenance manager wants to learn the data of the treated water usage reduction period for one week in the water treatment system 1A, the one week is input as a set value.

  In step ST12, the time information measuring unit 32 measures current time information (date and time), and proceeds to step ST13.

  In step ST13, the flow meter 19 detects the accumulated usage amount of the treated water W2 per unit time. The cleaning time setting unit 34 receives the accumulated usage data and proceeds to step ST14.

  In step ST14, the treated water usage information storage unit 46 stores treated water usage information including the integrated usage amount of the treated water W2 detected in step ST13 per unit time and the time information measured in step ST12. Proceed to ST15.

  In step ST15, the treated water use amount reduction time zone learning unit 36 determines a time zone in which the use amount of the treated water W2 falls below a predetermined value based on the treated water use information stored in step ST14. It learns as a fall time zone and progresses to step ST16.

  In step ST16, the learning period determination unit 37 uses the treated water based on the learning period (for example, one week) input from the learning period input unit 50 and the time information measured by the time information measuring unit 32. It is determined whether or not a period (learning period) in which the decrease time period learning unit 36 should learn has elapsed. If the learning period has elapsed (YES), the process proceeds to step ST17.

  On the other hand, if the learning period has not elapsed (NO), the process returns to step ST12, and steps ST12 to ST15 are repeated until the learning period elapses.

  In step ST <b> 17, the treated water usage information storage unit 46 stores the treated water usage reduction time zone data learned by the treated water usage reduction time zone learning unit 36 in step ST <b> 15 and ends the control of the learning mode. . Thereby, it is possible to automatically learn the treated water usage reduction time period during a preset period. The learned data of the treated water use reduction time zone is used in the cleaning operation execution mode shown in FIG.

  Next, the cleaning operation execution mode will be described with reference to FIG. As shown in FIG. 8, in step ST21, the cleaning operation execution control unit 35 reads the data of the treated water use amount decrease time zone stored in step ST17 shown in FIG. Proceed to ST22.

  In step ST22, the time information measuring unit 32 measures current time information, and proceeds to step ST23.

  In step ST23, the cleaning operation execution time determination unit 33 determines the current time based on the data of the treated water use decrease time period read in step ST21 and the time information (current time) measured in step ST22. It is determined whether or not the above-mentioned treated water usage amount reduction time zone has been reached. That is, the cleaning operation execution time determination unit 33 determines whether or not the current time has reached the time for performing the cleaning operation (for example, the time corresponding to 7:00 in FIG. 3A described above).

If it is time to perform the cleaning operation (YES), the process proceeds to step ST24.
On the other hand, if it is not time to perform the cleaning operation (NO) (for example, the time corresponding to before 7 o'clock in FIG. 3A described above), the process returns to step ST22 to perform the cleaning operation. Steps ST22 and ST23 are repeated until

  In step ST24, the flow meter 19 detects the accumulated usage amount of the treated water W2 per unit time at the time when the cleaning operation is performed. The cleaning time setting unit 34 receives the accumulated usage data and proceeds to step ST25.

  In step ST25, the cleaning time setting unit 34 performs the reverse cleaning time and the water cleaning time shorter than a predetermined standard cleaning time (standard time) based on the accumulated usage amount per unit time of the treated water W2 detected in step ST24. Is set, and the process proceeds to step ST26. Since the setting of the cleaning time is the same as in the case of the first embodiment, redundant description is omitted.

  In this way, by setting the cleaning time shorter than the standard cleaning time, the water stop time can be made shorter than the standard water stop time. In addition, since the water stop time can be shortened (reduced), the amount of cleaning water (raw water W1 and treated water W2) used can be reduced.

  In step ST26, the cleaning operation execution control unit 35 performs the reverse cleaning process at 7 o'clock shown in FIG. 3A, for example, based on the reverse cleaning time set in step ST25. Subsequently, the cleaning operation execution control unit 35 performs a water washing process based on the water washing time set in step ST25.

  Thus, according to the second embodiment, the cleaning time is set short and the cleaning operation is simply performed. Therefore, although it is difficult to completely recover the filtration performance of the filtration apparatus 4, the filtration performance can be restored to such an extent that the quality of the treated water W2 does not deteriorate.

  In step ST26, after the cleaning operation is performed by the cleaning operation execution control unit 35, the present control is terminated and the operation mode returns to the normal water treatment mode. That is, the process returns to the filtration step to produce the treated water W2.

According to the water treatment system 1A of the second embodiment described above, the same effects as the case of the water treatment system 1 of the first embodiment are exhibited, and the following effects are exhibited.
The water treatment system 1A of the second embodiment includes a filtration device 4 having a control valve 6 as a backwashing means and a waterwashing means, a backwashing water supply line L5, a backwashing water supply pump 15 as a backwashing means, Washing valve 16 and drainage line L4, raw water line L1 as flushing means, raw water pump 2, raw water valve 3 and drainage line L4, flow meter 19 as treated water usage detecting means, time information measuring unit 32, A treated water usage information storage unit 46 for storing treated water usage information including the accumulated usage amount and time information of the treated water W2 per unit time, and a treated water usage reduced time zone learning for learning a treated water usage reduced time zone The cleaning time for setting a cleaning time shorter than the standard cleaning time in the cleaning operation, unit 36, learning period input unit 50, learning period determination unit 37, cleaning operation execution timing determination unit 33 A cleaning operation execution control unit 35 that performs the cleaning operation based on the cleaning time set by the cleaning time setting unit 34 at the cleaning operation execution time determined by the fixing unit 34 and the cleaning operation execution time determination unit 33; Is provided.

  For this reason, the treated water use amount decrease time zone learning unit 36 can easily learn (understand) the time zone (treated water use amount decrease time zone) in which the accumulated use amount of the treated water W2 is small. Therefore, the system maintenance manager is relieved from the labor for collecting data during the period of reduced treated water usage.

As mentioned above, although one Embodiment of this invention was described, this invention is not restrict | limited to embodiment mentioned above, It can change suitably.
For example, in the first embodiment, the cleaning time setting unit 34 has been described as individually setting the reverse cleaning time to 7 minutes and the water cleaning time to 10 minutes with respect to the standard cleaning time. Not limited to. Based on the standard cleaning time and the accumulated usage amount per unit time of the treated water W2, the reverse cleaning time and / or the water cleaning time may be appropriately increased or decreased. Further, the back washing time and the water washing time may be the same time.

  In the first embodiment and the second embodiment, the cleaning operation is performed once in a time period in which the accumulated usage amount of the treated water W2 is small per unit time in a time shorter than the normal time. Although described, this is not restrictive. For example, when it is predicted that the quality of the raw water W1 is further deteriorated, the cleaning operation may be controlled to be performed in other time zones where the accumulated usage amount of the treated water W2 per unit time is small. Good. That is, the above simple cleaning operation may be performed a plurality of times.

  Moreover, in the said 1st Embodiment and the said 2nd Embodiment, although demonstrated that the integrated usage-amount of the treated water W2 per unit time was detected as an integrated usage-amount for every hour, it is not restrict | limited to this. The accumulated usage amount of the treated water W2 per unit time may be, for example, an accumulated usage amount every 15 minutes or an accumulated usage amount every 30 minutes.

  Moreover, in the said 1st Embodiment and the said 2nd Embodiment, although the treated water W2 was used for the backwashing water at the time of a backwashing process, and raw water W1 was used for the rinsing water at the time of a waterwashing, it restrict | limits to this Not. For example, the treated water W2 may be used for backwashing water and rinsing water, or raw water W1 may be used for backwashing water and rinsing water.

1,1A Water treatment system 2 Raw water pump (water washing means)
3 Raw water valve (flushing means)
4 Filtration processing device 6 Control valve (back washing means, water washing means)
15 Backwash water supply pump (backwashing means)
16 Backwash valve (backwashing means)
18 Water quality meter for treated water 19 Flow meter (Treatment water usage detection means)
20 Time zone input section (Time zone input means)
21 Cleaning time input section (cleaning time input means)
30, 30A control device 32 time information measuring unit (time information measuring means)
33 Cleaning operation execution time determination unit (cleaning operation execution time determination means)
34 Cleaning time setting section (cleaning time setting means)
35 Cleaning operation execution control unit (cleaning operation execution control means)
36 Treated water usage reduction time zone learning unit (Treatment water usage reduction time zone learning means)
37 learning period determination unit (learning period determination means)
46 treated water usage information storage unit (treated water usage information storage means)
50 Learning period input section (learning period input means)
L1 Raw water line (water washing means)
L4 Drainage line (back washing means, water washing means)
L5 Backwash water supply line (backwashing means)
W1 Raw water W2 Treated water

Claims (4)

A filtration apparatus for producing treated water by capturing suspended substances contained in raw water with a filter medium;
Backwashing means for supplying wash water to the filter medium to backwash the filter medium and discharging the trapped suspended matter together with the wash water to the outside of the system;
Rinsing means for supplying rinsing water to the filter medium in order to rinse the back-washed filter medium, and discharging the rinsing water rinsed with the filter medium out of the system;
Treated water usage detection means for detecting the accumulated usage per unit time of treated water;
A time zone input means for setting, by an input operation, a treated water usage amount reduction time zone in which the accumulated usage amount of treated water detected by the treated water usage amount detecting means per unit time falls below a predetermined value;
The conducted in the treated water consumption decreases the time zone set by the time zone input unit, and a backwash step and short cleaning time of the cleaning operation consisting of washing process by the water-washing unit according to the backwashing means, the processing a cleaning time input means for setting the input operation short short cleaning time than standard washing time cleaning operation is performed in a time zone where the water is not used,
Time information measuring means for measuring time information;
Cleaning that determines whether or not it is time to perform a cleaning operation based on the treated water use reduction time zone set by the time zone input means and the time information measured by the time information measurement means An operation execution time determination means;
A water treatment comprising: a cleaning operation execution control unit that performs a cleaning operation based on the short-term cleaning time set by the cleaning time input unit at a cleaning operation execution time determined by the cleaning operation execution time determination unit. system. Wherein the short cleaning time set by the washing time input means, by washing time in the backwash time and the washing step in the backwashing step is set individually, water according to claim 1 which is configured Processing system. A filtration apparatus for producing treated water by capturing suspended substances contained in raw water with a filter medium;
Backwashing means for supplying wash water to the filter medium to backwash the filter medium and discharging the trapped suspended matter together with the wash water to the outside of the system;
Rinsing means for supplying rinsing water to the filter medium in order to rinse the back-washed filter medium, and discharging the rinsing water rinsed with the filter medium out of the system;
Treated water usage detection means for detecting the accumulated usage per unit time of treated water;
Time information measuring means for measuring time information;
Treated water usage information storage means for storing treated water usage information including the accumulated usage amount per unit time of the treated water detected by the treated water usage detection means and the time information measured by the time information measuring means;
Based on the treated water usage information stored in the treated water usage information storage means, a treated water usage amount that learns a time zone during which the treated water usage amount falls below a predetermined value as a treated water usage reduced time zone A learning time period learning means,
A learning period input means for inputting a learning period to be learned by the treated water use amount reduction time zone learning means;
Learning period determining means for determining whether or not the learning period input from the learning period input means has passed;
Based on the treated water usage reduction time zone learned by the treated water usage reduction time zone learning means and the time information measured by the time information measuring means, the back washing step by the back washing means and the A cleaning operation execution time determination means for determining whether or not it is time to perform a cleaning operation comprising a water washing step by the water washing means;
Based on the integrated amount for each unit of processing water detected time by the treated water amount detecting means, the processing is shorter than the standard washing time cleaning operation is performed in a time zone that is not used water short wash time Cleaning time setting means for setting,
A water treatment comprising: a cleaning operation execution control means for performing a cleaning operation based on the short-term cleaning time set by the cleaning time setting means at the cleaning operation execution time determined by the cleaning operation execution time determining means. system. Wherein said set by washing time setting means short cleaning time, by rinsing time in the backwash time and the washing step in the backwashing step is set individually, water according to claim 3 which is set Processing system.

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