Filter system, filter blockage detection method and program

Abstract

To provide a filter system capable of easily detecting the blockage of a filter of a solid-liquid separation device, a filter blockage detecting method capable of detecting the blockage of a filter, and a program detecting blockage.SOLUTION: A filter system S is equipped with a solid-liquid separation device X provided with a solid-liquid separating portion 11 movable by rotations of a rotor 21, and a control device 30 that can record an operation value relating to an operation state of the solid-liquid separating portion 11 and can control the operation value on the basis of a water level on a primary side. The control device 30 is configured to calculate a period average value that is an average value of the operation value for each set predetermined period. A filter blockage detecting method includes a period average value calculating step in which the control device 30 calculates the period average value that is the average value of the operation value for each set predetermined period, and a determining step for determining a dirt level of the solid-liquid separating portion 11 on the period average value. A program makes the control device to realize a period average value calculating function and a determining function.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a filter system including a solid-liquid separator provided with an endless strip filter that can be moved by the rotation of a rotor, a method for detecting filter clogging, and a program for detecting filter clogging. [Background technology]

[0002] Solid-liquid separation devices used in sewage treatment, such as rotary filter devices, are devices that are configured in the form of an endless strip filter made up of multiple connected panel filters, and by rotating the endless strip filter, they separate solids from the water to be treated while regenerating the filter. In this type of device, the processing capacity of the device can be adjusted by adjusting the rotation speed of the endless strip filter.

[0003] Patent Document 1 discloses a method for operating a moving screen dust collector, in which when it is detected that the water level has risen to a set water level, the dust collector is operated at high speed and then controlled to gradually reduce the operating speed, and when the water level is below the set water level, the dust collector is stopped or operated at a slow speed and put into standby.

[0004] Normally, when the water to be treated passes through a filter, the filter captures residue (solid matter). The captured matter is removed and collected by spraying cleaning water onto the filter, but dirt gradually accumulates on the filter. As dirt accumulates on the filter, the processing capacity of the device decreases, so the rotation speed of the drive motor must be increased.

[0005] Furthermore, the degree of contamination of the filter is mainly determined by visual inspection. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 8-177030 Summary of the Invention [Problem to be solved by the invention]

[0007] The quality and volume of the water being treated flowing into a rotary filter device fluctuates greatly depending on daily activities, weather, and the season. Therefore, it is not easy to detect the accumulation of dirt on the filter simply by looking at the instantaneous change in the rotation speed of the drive motor, and by the time it is noticed, the filter may have become clogged.

[0008] When the filter becomes clogged, the treatment volume cannot be maintained even when the drive motor rotation speed reaches its upper limit, and measures such as overflow or reducing the treatment volume must be taken. Furthermore, once the filter becomes clogged, dirt cannot be easily removed, for example, by scrubbing the filter with a brush, and offline cleaning, such as immersion cleaning in a chemical solution, must be performed after removing the filter from the device. Performing offline cleaning by stopping the inflow of water to be treated into the facility may hinder the facility's water treatment.

[0009] Furthermore, it is difficult to visually check the filter contamination while the rotary filter device is in operation. Even if it is necessary to check while the device is stopped, it is cumbersome because it is necessary to remove the filter inside the device and observe it. Identifying filter contamination is a qualitative, intuitive task that depends largely on the skill and know-how of the user.

[0010] Therefore, an object of the present invention is to provide a filter system that can easily detect blockage of a filter in a solid-liquid separation device, a filter blockage detection method that can detect blockage of a filter, and a program for detecting blockage of a filter. [Means for solving the problem]

[0011] The filter system according to the present invention for achieving the above object comprises: a filtering surface through which the water to be treated passes and which filters out solids; a solid-liquid separator provided with a solid-liquid separator that can be moved by rotation of a rotor; The filtering surface Primary side The water to be treated water level When the rotation speed of the rotor in the solid-liquid separation section becomes higher than a predetermined value, the rotation speed of the rotor is increased. Control do a control device; A filter system, The aforementioned The control device The integrated value of the measurement values ​​relating to the operating state of the solid-liquid separation unit selected from the travel distance of the solid-liquid separation unit, the integrated rotation speed of the rotor, and the integrated treated water volume of the water to be treated can be recorded as an operating value, The system is configured to calculate a period average value, which is an average value of the operating values, for each set predetermined period. and further comprising a display device that displays the calculated period average value. The point is that it is structured as follows.

[0012] The rotor rotation speed is determined by the quality and volume of the water being treated flowing into the solid-liquid separator, and is therefore specific to that separator and cannot be generally determined. By setting a predetermined period and calculating the average value over that period, as in this configuration, the effects of fluctuations in water quality and volume on the separator can be averaged to determine the degree of contamination in the solid-liquid separator. This makes it possible to identify accumulated contamination in the solid-liquid separator, which cannot be detected by instantaneous changes in the rotor's operating values ​​alone. Furthermore, setting a predetermined period also sets a monitoring period, eliminating the need for constant monitoring and reducing labor. Furthermore, with this configuration, the degree of contamination of the endless band filter can be easily determined based on the integrated value of various operating values ​​measured in relation to the operating state.

[0013] The user can easily determine the degree of contamination of the solid-liquid separation section based on the calculated period average value. Furthermore, for example, from the transition of the period average value, the user can become aware of signs of accumulation of contamination in the solid-liquid separation section before it becomes clogged.

[0014] If users can determine the degree of contamination in the solid-liquid separation unit based on the average value over a period, as in this configuration, they can avoid having to perform offline cleaning (COP) such as chemical immersion cleaning of the solid-liquid separation unit at unexpected times. This can prevent the risk of disrupting the facility's water treatment. Furthermore, by being able to determine whether contamination has accumulated in the solid-liquid separation unit (or if there are signs of contamination accumulation), online cleaning (CIP) such as chemical spray cleaning can be carried out in a planned manner.

[0015] A further characteristic configuration of the filter system according to the present invention is The aforementioned The display device displays the period average value in the form of a graph.

[0016] With this configuration, the user can visually and intuitively recognize changes in operating values ​​related to the operating state of the solid-liquid separation unit based on the graph of period average values ​​displayed on the display device, making it easier and more intuitive to determine the degree of contamination of the solid-liquid separation unit. Furthermore, while traditionally, identifying contamination in a solid-liquid separation unit was done intuitively and qualitatively, being able to intuitively determine the degree of contamination in the solid-liquid separation unit as with this configuration reduces the dependency on the user's skill and know-how in identifying the contamination, leading to labor savings in maintenance.

[0017] A further characteristic feature of the filter system according to the present invention is that the set threshold value is displayed on a graph.

[0018] According to this configuration, the degree of contamination of the solid-liquid separation section can be visually and easily determined based on the period average value and threshold value displayed on the display device.

[0019] A further characteristic configuration of the filter system according to the present invention is moreover an alarm device, and the control device is configured to The aforementioned When the threshold is exceeded Signal The alarm device and the alarm device transmits the signal. The feature is that it is configured to issue a warning alarm.

[0020] According to this configuration, an alarm can be issued by the alarm device based on a set threshold value, so that the user can be reliably notified that dirt has accumulated in the solid-liquid separation section or that there are signs of dirt accumulation.

[0021] A further characteristic feature of the filter system according to the present invention is that the solid-liquid separator is a rotary filter device, and the solid-liquid separator is an endless strip filter.

[0022] According to this configuration, when applied to an existing rotary filter device, the degree of contamination of the endless band filter of the rotary filter device can be easily determined.

[0025] A further characteristic configuration of the filter system according to the present invention is that the solid-liquid separation device is a rotary filter device, the solid-liquid separation section is an endless strip filter, and the operating value is the running distance of the endless strip filter.

[0026] According to this configuration, the degree of contamination of the endless band filter in the rotary filter device can be easily determined based on the travel distance of the endless band filter.

[0027] A further characteristic feature of the filter system according to the present invention is that, in calculating the period average value, only the period during which the solid-liquid separator was operating during the predetermined period is taken into consideration.

[0028] According to this configuration, the period during which the solid-liquid separator is stopped is not taken into consideration, so that the degree of contamination of the endless belt-shaped filter can be easily determined based on an accurate period.

[0029] The filter clogging detection method according to the present invention is characterized by the following features: a filtering surface through which the water to be treated passes and which filters out solids; a solid-liquid separator provided with a solid-liquid separator that can be moved by rotation of a rotor; The filtering surface Primary side The water to be treated water level When the rotation speed of the rotor in the solid-liquid separation section becomes higher than a predetermined value, the rotation speed of the rotor is increased. Control and recording, as an operating value, an integrated value of measured values ​​relating to the operating state of the solid-liquid separation unit selected from the travel distance of the solid-liquid separation unit, the integrated rotation speed of the rotor, and the integrated treated water volume of the water to be treated. a control device, the control device calculating a period average value which is an average value of the operating values ​​for each set predetermined period; When exceeds the set threshold The solid-liquid separation section If there is any sign of dirt accumulation or A judgment process for making a judgment; Execute It's at the point.

[0030] According to this configuration, by setting a predetermined period and calculating the average value for that period, the effects of fluctuations in water quality and volume on the solid-liquid separation device can be averaged out to determine the degree of fouling in the solid-liquid separation section. This makes it possible to identify accumulated fouling in the solid-liquid separation section that cannot be detected by instantaneous changes in the rotor operating values ​​alone. Furthermore, by setting a predetermined period, a monitoring period can be set, eliminating the need for constant monitoring, thereby reducing the labor required. Furthermore, with this configuration, the degree of contamination of the endless band filter can be easily determined based on the integrated value of various operating values ​​related to the operating state. Furthermore, with this configuration, the degree of contamination of the solid-liquid separation section can be easily determined based on the period average value and the threshold value.

[0031] If users can determine the degree of contamination in the solid-liquid separation unit based on the average value over a period, as in this configuration, they can avoid having to perform offline cleaning (COP) such as chemical immersion cleaning of the solid-liquid separation unit at unexpected times. This can prevent the risk of disrupting the facility's water treatment. Furthermore, by being able to determine whether contamination has accumulated in the solid-liquid separation unit (or if there are signs of contamination accumulation), online cleaning (CIP) such as chemical spray cleaning can be carried out in a planned manner.

[0034] The program according to the present invention has the following characteristic configuration: a filtering surface through which the water to be treated passes and which filters out solids; a solid-liquid separator provided with a solid-liquid separator that can be moved by rotation of a rotor; The filtering surface Primary side The water to be treated in Water level When the rotation speed of the rotor in the solid-liquid separation section becomes higher than a predetermined value, the rotation speed of the rotor is increased. Control and recording, as an operating value, an integrated value of measured values ​​relating to the operating state of the solid-liquid separation unit selected from the travel distance of the solid-liquid separation unit, the integrated rotation speed of the rotor, and the integrated treated water volume of the water to be treated. A program for detecting blockage of the solid-liquid separation unit of a filter system including a control device, computer a period average value calculation function that calculates a period average value that is an average value of the operating values ​​for each set predetermined period when the control device is executed by the above; When exceeds the set threshold The solid-liquid separation section If there is any sign of dirt accumulation or The point is that the control device realizes a judgment function for making a judgment.

[0035] According to this configuration, by setting a predetermined period and calculating the average value for that period, it is possible to provide a program that can average the effects of fluctuations in water quality and water volume on the solid-liquid separator and determine the degree of fouling in the solid-liquid separation section. This program makes it possible to identify the accumulation of fouling in the solid-liquid separation section, which cannot be detected by only instantaneous changes in the rotor operating values. Furthermore, with this configuration, the degree of contamination of the endless band filter can be easily determined based on the integrated value of various operating values ​​related to the operating state. Furthermore, with this configuration, the degree of contamination of the solid-liquid separation section can be easily determined based on the period average value and the threshold value. [Brief explanation of the drawings]

[0036] [Figure 1] 1 is a schematic diagram illustrating a filter system according to an embodiment. [Figure 2] FIG. 10 is a plan view showing a filter mechanism including an endless belt-shaped filter. [Figure 3] 3 is a flow chart illustrating a filter blockage detection method of the present invention. [Figure 4] 1 is a graph showing a 24-hour fluctuation pattern of the water to be treated flowing into a rotary filter device. [Figure 5] 1 is a graph showing the calculated average daily speed of an endless strip filter over a two-week period. [Figure 6] 10 is a graph showing the results of calculating the average speed for a predetermined period (one week). DETAILED DESCRIPTION OF THE INVENTION

[0037] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in Figures 1 and 2, the filter system S of the present invention comprises a solid-liquid separation device X having a solid-liquid separation section 11 that can be moved by the rotation of a rotor 21, and a control device 30 that can record operating values ​​related to the operating state of the solid-liquid separation section 11 and can control the operating values ​​based on the water level on the primary side.

[0038] The control device 30 is configured to calculate a period average value, which is the average value of the operation values, for each set predetermined period. In this embodiment, a case will be described in which the control device 30 is configured to calculate a period operation value by aggregating the recorded operation values ​​of the solid-liquid separation unit 11 for each set predetermined period, and to calculate the period average value by dividing the period operation value by the running time.

[0039] The filter system S also includes a display device 40 that displays the calculated period average value.

[0040] The filter clogging detection method of the present invention includes a period average value calculation step A1 for calculating a period average value, which is the average value of the operating values, for each set predetermined period, and a determination step A2 for determining the degree of contamination of the solid-liquid separation section 11 based on the period average value (FIG. 3). In this embodiment, the period average value calculation step A1 will be described as calculating a period operating value by aggregating the recorded operating values ​​of the solid-liquid separation section 11 for each set predetermined period, and then calculating the period average value by dividing the period operating value by the running time.

[0041] The program for detecting clogging of the solid-liquid separation section 11 of the filter system S of the present invention is configured to cause the control device 30 to realize, when executed by the control device 30, a period average value calculation function for calculating a period average value, which is the average value of the operating values, for each set predetermined period, and a judgment function for judging the degree of contamination of the solid-liquid separation section based on the period average value. In this embodiment, the period average value calculation function will be described as calculating a period operating value by aggregating the recorded operating values ​​of the solid-liquid separation section 11 for each set predetermined period, and then calculating the period average value by dividing the period operating value by the running time.

[0042] The operating value may be an integrated value of the measured values ​​relating to the operating state, such as, but not limited to, the travel distance, the integrated number of rotations of the rotor 21, or the integrated amount of treated water.

[0043] In this embodiment, a case will be described in which the solid-liquid separator X is a rotary filter device, the solid-liquid separator 11 is an endless strip filter, and the operating value is a travel distance. In this case, the control device 30 is configured to calculate and record the travel distance of the endless strip filter 11. Furthermore, the control device 30 is configured to calculate a periodic travel distance (an example of a periodic operating value) by tallying the recorded travel distance of the endless strip filter 11 for each set predetermined period, and to calculate a periodic average speed (an example of a periodic average value) by dividing the periodic travel distance by the running time.

[0044] The rotary filter device X is disposed across the flow path 1 and is a device for filtering solids contained in the water to be treated W1 flowing through the flow path 1. The flow path 1 is provided inside a housing 2, which is a water tank. The housing 2 is provided with an inlet 3 and an outlet 4 for the water to be treated W1.

[0045] 1, the rotary filter device X is equipped with an endless strip filter 11 that moves along an opening 2A provided on the primary side (inlet side) inside a housing 2 into which the water to be treated W1 flows, and is configured to filter solids by passing the water to be treated through the endless strip filter 11. The rotary filter device X of this embodiment is equipped with a filter mechanism 10 that has a plurality of panel filters (an example of endless strip filters) 11 arranged endlessly along an orbit P and that is arranged to cross a flow path 1, and a movement mechanism 20 that moves each panel filter 11 along the orbit P, and is configured to pass the water to be treated W1 through a filtering surface F formed by the panel filters 11 from the outside to the inside of the orbit P while moving each panel filter 11 by the movement mechanism 20, thereby filtering solids.

[0046] 1, the rotary filter device X further includes a removal mechanism 5 that removes solids in the water to be treated W1 filtered by each panel filter 11 from each panel filter 11, and a housing 6 that accommodates these. Unless other materials are specified, each part of the rotary filter device X is manufactured by appropriately processing stainless steel, for example, SUS304.

[0047] The rotary filter device X of this embodiment is installed in a manner inclined from the upstream side to the downstream side of the flow path of the water to be treated W1, and the panel filter 11 is moved from bottom to top on the primary side into which the water to be treated W1 flows by a moving mechanism 20. At this time, solids (screen residue, etc.) contained in the water to be treated W1 are blocked by a filtration surface F formed by the panel filter 11, and filtrate W2, which is the moisture in the water to be treated W1, passes through the filtration surface F and is transported to the outlet 4.

[0048] In this embodiment, a description will be given of a case where the orbit P has two turning portions Pa, Pc and two straight portions Pb, Pd connecting the turning portions Pa, Pc, as shown in Fig. 1. The turning portion Pa is provided on the upstream side of the flow path 1 in the flow direction, and the turning portion Pc is provided on the downstream side of the flow path 1 in the flow direction and above the water surface. The straight portion Pb is provided between the turning portions Pa, Pc on the upstream side of the flow path 1 in the flow direction, and the straight portion Pd is provided between the turning portions Pa, Pc on the downstream side of the flow path 1 in the flow direction.

[0049] 1, each panel filter 11 is moved by a moving mechanism 20 along a circular path P in the order of a turning portion Pa, a straight portion Pb, a turning portion Pc, and a straight portion Pd. When the panel filter 11 is located at the straight portion Pb, it functions as a filtering surface F of the filter mechanism 10.

[0050] The removal mechanism 5 is configured to include a scraper that scrapes off solids on the surface of the panel filter 11, a spray mechanism that sprays high-pressure cleaning water from the back surface to the front surface of the panel filter 11, and a recovery section that recovers the solids removed from the panel filter 11. The filtered solids are removed from each panel filter 11 by the removal mechanism 5 as it moves from the turning section Pc to the straight section Pd.

[0051] The filter medium 13 is made of a wire mesh with a mesh size of about 0.1 mm to 1.0 mm, and is attached to the filter medium placement portion of the frame 12 by welding, sintering, etc., but is not limited to this form. The wire mesh may be plain weave, twill weave, plain dutch weave, twill dutch weave, etc., and the mesh size should be appropriate depending on the flow diameter of the solid to be filtered.

[0052] 1 and 2, the movement mechanism 20 includes a sprocket (rotor) 21 that forms the turn-back portion Pc, guide rails 22 (22a, 22b, 22d) that form the turn-back portion Pa and straight portions Pb and Pd, a roller chain 23 to which each panel filter 11 is attached and that is wound around the rotor 21 and the guide rails 22 while meshing with the rotor 21, and an electric motor 24 that rotates and drives the rotor 21. The output from the drive shaft of the electric motor 24 is transmitted to the rotation shaft of the rotor 21 via a transmission mechanism 25.

[0053] When the rotor 21 is rotated by the moving mechanism 20 configured in this manner, the roller chain 23 meshed with the rotor 21 moves along the orbit P while being guided along the guide rail 22 .

[0054] The electric motor 24 that rotates the rotor 21 is electrically connected to the control device 30 and is configured to transmit information about the operating state of the rotor 21 (number of rotations, current value, etc.) to the control device 30.

[0055] The control device 30 may be a known computer configured to calculate the travel distance of the panel filter 11 based on information about the operating state received from the electric motor 24 and record the results of the calculation. That is, the control device 30 includes typical computer components, such as an arithmetic unit, a storage device, and an input / output device. In the rotary filter device X, a water level indicator 7 is provided on the primary side of the panel filter 11, which can detect the water level on the primary side of the panel filter 11. The output of the water level indicator 7 is input to the control device 30. A control program for PID control, which controls the rotation speed of the rotor 21 (electric motor 24) according to the water level of the rotary filter device X, is installed in the control device 30. For example, the control device 30 controls the rotation speed of the rotor 21 to maintain the water level on the primary side within a predetermined range. Since the accumulation of dirt on the panel filter 11 reduces treatment efficiency, if dirt accumulates (a rise in the water level is detected), the control program instructs the rotor 21 to rotate at a higher speed than when no dirt is accumulated.

[0056] The control device 30 calculates the travel distance of the panel filter 11 at set intervals (for example, every minute) based on information about the operating state received from the electric motor 24, and records the results of the calculation. The set intervals can be set as appropriate and are not limited to the above-mentioned times.

[0057] Furthermore, the control device 30 calculates the periodic mileage by summing up the recorded mileage of the panel filter 11 for each set predetermined period.

[0058] The predetermined period can be set within a desired range. For example, it can be set based on the inflow pattern of the water to be treated W1 into the rotary filter device X. Specifically, it can be set based on a period in which the fluctuations in the quality and quantity of the water to be treated are small, or a period in which such fluctuations are large. These periods can be set appropriately, for example, to any period between 1 and 24 hours, any period between 1 and 7 days, or any period between 1 and 4 weeks. In this embodiment, the predetermined period is described as one week.

[0059] For each predetermined period set in this way, the recorded travel distance of the panel filter 11 is tallied to calculate the periodic travel distance. That is, the multiple results of the travel distance obtained for each set time are tallied (added) for each predetermined period (one week) to calculate the periodic travel distance.

[0060] Next, the period average speed is calculated by dividing the period travel distance by the travel time (period average calculation step A1). The travel time is usually the predetermined period described above, but if there is a period during which the rotary filter device X is stopped (stop period), for example, the time can be calculated by subtracting the stop period from the predetermined period. In other words, in calculating the period average value, only the period during which the rotary filter device X was operating is taken into account. By setting the travel time to a period that does not take into account the stop period, it is possible to easily determine the degree of contamination of the endless band filter based on an accurate period. The period average speed calculated in this manner is stored in the control device 30.

[0061] The period average speed stored in the control device 30 can be displayed on the display device 40. The display device 40 is not particularly limited as long as it can display the data stored in the control device 30, and a known monitor or the like can be used.

[0062] At this time, the user can determine the degree of contamination of the panel filter 11 based on the period average speed displayed on the display device 40 (determination step A2).

[0063] The rotation speed of the rotor 21 (motor 24) is determined by the quality and volume of the water to be treated flowing into the rotary filter device X, and is therefore specific to that rotary filter device X and cannot be generally determined. As in this configuration, by setting a predetermined period and calculating the average speed over that period, the effects of fluctuations in water quality and volume on the rotary filter device X can be averaged to determine the degree of contamination of the panel filter 11. This makes it possible to identify accumulated contamination on the panel filter 11 that cannot be detected by instantaneous changes in the rotation speed of the rotor 21 alone. Furthermore, setting a predetermined period sets a monitoring period, eliminating the need for constant monitoring and reducing labor.

[0064] The user can easily determine the degree of contamination of the panel filter 11 based on the average speed over a period displayed on the display device 40. In addition, for example, from the transition of the average speed over a period, the user can become aware of signs of accumulation of contamination on the panel filter 11 before the panel filter 11 becomes clogged.

[0065] If the user can determine the degree of contamination of the panel filter 11 based on the average speed over a period, as in this configuration, it becomes unnecessary to perform offline cleaning (COP) such as chemical immersion cleaning of the panel filter 11 at unexpected times. This can prevent the risk of disrupting the facility's water treatment. Furthermore, by being able to determine whether or not contamination has accumulated on the panel filter 11 (or if there are signs of contamination accumulation), online cleaning (CIP) such as chemical spray cleaning can be carried out in a planned manner.

[0066] The display device 40 may display only the period average speed, or may be configured to display the calculated period average speed in a graph. For example, the graph may have the horizontal axis representing the predetermined period and the vertical axis representing the period average speed.

[0067] With this configuration, the user can visually and intuitively recognize changes in the speed of panel filter 11 based on the graph displayed on display device 40, making it easier and more intuitive to determine the degree of contamination of panel filter 11. Furthermore, while previously, distinguishing whether panel filter 11 is dirty was done intuitively and qualitatively, being able to intuitively determine the degree of contamination on panel filter 11 as with this configuration reduces the dependency on the skill and know-how of the user in distinguishing the degree of contamination, leading to labor savings in maintenance.

[0068] The display device 40 may display the set threshold on a graph. The threshold can be displayed by drawing a line, such as a dotted line, on the graph, but is not limited to this.

[0069] The threshold value can be set arbitrarily. Once the user determines the threshold value, the value can be input into the control device 30, where it can be stored and displayed on the graph displayed on the display device 40.

[0070] In this configuration, the degree of contamination of the panel filter 11 can be easily determined based on the period average speed and the threshold value displayed on the display device 40.

[0071] The filter system S can be provided with an alarm device 50 that can notify the user of the degree of contamination of the panel filter 11.

[0072] The warning device 50 is electrically connected to the control device 30. The control device 30 is configured to issue a warning alarm by the warning device 50 when the average speed for a period stored in the control device 30 exceeds a preset threshold value.

[0073] In this embodiment, the control device 30 compares the average speed over a period with a set threshold, and when the average speed over a period exceeds the set threshold, for example, the control device 30 determines the degree of dirt on the panel filter 11, and if it determines that the dirt has accumulated (or there are signs of dirt accumulation), the control device 30 issues a warning alarm using the warning device 50.

[0074] Based on the above judgment, the control device 30 may be configured to transmit a signal to the alarm device 50 to cause the alarm device 50 to issue an alarm to notify the user that dirt has accumulated on the panel filter 11 or that there are signs of dirt accumulation.

[0075] The warning alarm is not particularly limited as long as it can notify the user of the warning, for example, by sound, light, vibration, or email notification to a mobile terminal.

[0076] In this configuration, the alarm device 50 can be configured to issue a warning alarm based on a set threshold value, so that the user can be reliably notified that dirt has accumulated on the panel filter 11 or that there are signs of dirt accumulation. [Example]

[0077] A method for detecting filter blockage in the filter system S of the present invention will be described below. FIG. 4 shows the 24-hour inflow (m ) of the water to be treated W1 flowing into the rotary filter device X. 3 / h), which shows the fluctuation pattern of the inflow volume, which increases from 8:00 a.m. and peaks at 10:00 p.m.

[0078] In the rotary filter device X, which is automatically controlled based on the inflow of the water to be treated W1 shown in Figure 4, the average daily speed (m / min) of the panel filter 11 was calculated over a two-week period (Figure 5). Here, the average daily speed (m / min) was calculated by dividing the travel distance (m) of the panel filter 11 per day by the travel time (min) per day. This shows that the speed varies from day to day.

[0079] Based on the data in Fig. 5, the predetermined period was set to one week, and for each predetermined period, the travel distance of the panel filter 11 for one day was totaled to calculate the period travel distance, and the period travel distance was divided by the travel time to calculate the period average speed (m / min) (period average value calculation step A1). The calculated period average speed was stored in the control device 30 and displayed as a graph on the display device 40 (Fig. 6).

[0080] The set threshold is indicated by a dashed line in Figure 6. According to this, 11 weeks after the start of operation of the rotary filter device X, the period average speed became greater than the threshold, and it was determined that dirt had accumulated on the panel filter 11 (determination step A2). At this time, the control device 30 transmitted a signal to the alarm device 50, which then issued an alarm, informing the user that dirt had accumulated on the panel filter 11.

[0081] As shown in FIG. 6, the period average speed is displayed in a graph on the display device 40, and the set threshold value can be displayed on the graph, so that the degree of contamination of the panel filter 11 can be visually and reliably determined.

[0082] [Another Example 1] In the above-described embodiment, a rotary filter device equipped with an endless strip filter 11 is used as the solid-liquid separator X. However, the solid-liquid separator X is not limited to a rotary filter device, and may be any solid-liquid separator that controls the speed of a drive motor in response to fluctuations in the primary water level depending on the quality and amount of water to be treated flowing into the facility, such as a strip filter type drum filtration device equipped with a cylindrical drum or a solid-liquid separator equipped with a drum screen as the solid-liquid separator 11.

[0083] [Another Example 2] In the above-described embodiment, the driving value is the distance traveled, and the user determines the degree of contamination of the panel filter 11 based on the period average speed (an example of a period average value). However, the present invention is not limited to this example, and the driving value may be the rotation speed of the motor that rotates the rotor, and the user may determine the degree of contamination of the panel filter 11 based on the period average rotation speed of the rotor 21 (an example of a period average value) instead of the period average speed.

[0084] In this case, the control device 30 may be configured to record the rotational speed of the electric motor that rotates the rotor. Furthermore, the control device 30 may be configured to calculate the periodic rotational speed by summing up the recorded rotational speeds for each set predetermined period, and to calculate the periodic average rotational speed by dividing the periodic rotational speed by the running time. [Industrial Applicability]

[0085] The present invention can be used in a filter system equipped with a solid-liquid separator having a solid-liquid separator that can be moved by the rotation of a rotor, a filter clogging detection method, and a program for detecting filter clogging. [Explanation of symbols]

[0086] S Filter System X Solid-liquid separator (rotary filter device) 11 Solid-liquid separation section (endless strip filter) 21 rotor 30 Control device 40 indicates the device 50 alarm devices A1 period average value calculation process A2 Judgment Project

Claims

1. A filter system comprising: a solid-liquid separation device having a filtering surface through which the water to be treated passes to filter out solids, and a solid-liquid separation section that is movable by the rotation of a rotor; and a control device that controls the rotation speed of the rotor in the solid-liquid separation section so as to increase the rotation speed when the water level of the water to be treated on the primary side of the filtering surface becomes higher than a predetermined value, The control device The integrated value of the measurement values ​​relating to the operating state of the solid-liquid separation unit selected from the travel distance of the solid-liquid separation unit, the integrated rotation speed of the rotor, and the integrated treated water volume of the water to be treated can be recorded as an operating value, The system is configured to calculate a period average value, which is an average value of the operating values, for each set predetermined period, The filter system further comprises a display device that displays the calculated period average value.

2. The filter system of claim 1, wherein the display device displays the average value over a period in a graph.

3. The filter system according to claim 2 , wherein the display device displays the set threshold on a graph.

4. Further equipped with an alarm device, 4. The filter system according to claim 3, wherein the control device is configured to transmit a signal to the alarm device when the period average value exceeds the set threshold, and the alarm device issues a warning alarm based on the signal.

5. 2. The filter system according to claim 1, wherein the solid-liquid separator is a rotary filter, and the solid-liquid separator is an endless strip filter.

6. the solid-liquid separator is a rotary filter device, and the solid-liquid separator is an endless strip filter; 2. The filter system of claim 1, wherein the operating value is a mileage of the endless strip filter.

7. 2. The filter system according to claim 1, wherein the calculation of the period average value takes into consideration only a period during which the solid-liquid separator was in operation during the predetermined period.

8. A filter system comprising: a solid-liquid separation device having a filtering surface through which the water to be treated passes to filter out solids, and having a solid-liquid separation section that can be moved by the rotation of a rotor; and a control device that controls the rotation speed of the rotor in the solid-liquid separation section so that the rotation speed of the rotor is increased when the water level of the water to be treated on the primary side of the filtering surface becomes higher than a predetermined value, and records as an operating value the cumulative value of the measurement values ​​relating to the operating state of the solid-liquid separation section selected from the traveling distance of the solid-liquid separation section, the cumulative rotation speed of the rotor, and the cumulative treated water volume of the water to be treated, a period average value calculation step in which the control device calculates a period average value that is an average value of the operating values ​​for each set predetermined period; and a determining step of determining that there is accumulation of dirt or a sign of it in the solid-liquid separation section when the average value for the period exceeds a set threshold.

9. A program for detecting blockage of the solid-liquid separation section of a filter system comprising: a solid-liquid separation device having a filtering surface that filters out solids by passing water to be treated, and having a solid-liquid separation section that can be moved by the rotation of a rotor; and a control device that controls the rotation speed of the rotor of the solid-liquid separation section so that the rotation speed of the rotor of the solid-liquid separation section increases when the water level of the water to be treated on the primary side of the filtering surface becomes higher than a predetermined value, and records as an operating value an accumulated value of measured values ​​relating to the operating state of the solid-liquid separation section selected from the traveling distance of the solid-liquid separation section, the accumulated rotation speed of the rotor, and the accumulated treated water volume of the water to be treated, When executed by a computer, a period average value calculation function in which the control device calculates a period average value, which is an average value of the operating values, for each set predetermined period; and a judgment function of judging that there is an accumulation of dirt or a sign of it in the solid-liquid separation section when the average value for the period exceeds a set threshold.

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