WO2022201888A1 - Dispositif de commande et procédé de commande - Google Patents

Dispositif de commande et procédé de commande Download PDF

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Publication number
WO2022201888A1
WO2022201888A1 PCT/JP2022/004131 JP2022004131W WO2022201888A1 WO 2022201888 A1 WO2022201888 A1 WO 2022201888A1 JP 2022004131 W JP2022004131 W JP 2022004131W WO 2022201888 A1 WO2022201888 A1 WO 2022201888A1
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WIPO (PCT)
Prior art keywords
water
sample water
channel
flow
sample
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PCT/JP2022/004131
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English (en)
Japanese (ja)
Inventor
健太郎 井上
康弘 松井
祐樹 宮内
浩之 片山
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横河電機株式会社
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Publication of WO2022201888A1 publication Critical patent/WO2022201888A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water

Definitions

  • the present disclosure relates to a control device and control method.
  • Patent Literature 1 describes a water sampling device for supplying test water to a measuring device that automatically measures the water quality of a water treatment facility, the water sampling device having a function to prevent clogging of water sampling pipes. ing.
  • a water sampling tube is used when a sample water of an amount that cannot be sampled at once by a typical water sampler including a Bandung water sampler and a Niskin water sampler is required.
  • a method of continuously sampling water by driving a suction pump after reaching a location or water depth is described.
  • Non-Patent Document 1 Water treatment systems need information about how well they can control the worst or maximum microbiological load.
  • water sampling is performed intermittently.
  • the prior art described in Non-Patent Document 1 focuses on how quickly sample water can be obtained in a short period of time. In either case, sufficient consideration has not been given to maintaining a constant flow rate of the sample water in order to adequately obtain a sample containing the worst or highest microbiological load. rice field. As a result, it was difficult to properly grasp the water quality fluctuation of the sample water.
  • An object of the present disclosure is to provide a control device and a control method that can contribute to appropriately grasping water quality fluctuations of sample water.
  • a control device includes a measurement unit that measures at least one of a flow rate and flow velocity of sample water flowing through a channel, an adjustment unit that adjusts the flow velocity of the sample water flowing through the channel, and the measurement a control unit that controls the adjustment unit based on at least one of the flow rate and flow velocity of the sample water measured by the unit, wherein the control unit controls the flow rate of the sample water to be maintained within a predetermined range. to control the adjustment unit.
  • control device can contribute to the appropriate understanding of water quality fluctuations in the sample water.
  • the control device controls the adjustment section so that the flow velocity of the sample water flowing through the channel is maintained within a predetermined range.
  • Control by such a control device enables the water sampling system to perform water sampling processing over a long period of time while maintaining the flow speed and flow rate of the sample water steadily.
  • the water sampling system can also achieve the target value of the amount of sampled water over a long period of time while steadily sampling small amounts of sample water.
  • the water sampling system can properly collect the sample water containing the worst or maximum microbiological load without leakage.
  • the above-described water sampling method using the water sampling system makes it possible to detect sudden fluctuations in the water quality of the sample water and to detect the worst case.
  • the worst condition of water quality occurring at the time of water sampling is reflected in the sample water, and it is possible not to miss the quality risk caused by the worst situation.
  • the water collection system can collect sample water as representative and average samples that reflect the contamination status of the entire fluid of interest. As a result, it becomes easy to appropriately grasp the water quality fluctuation of the sample water and the control performance of the water treatment system.
  • the measurement unit may include a flow meter arranged on the flow path and measuring the flow rate of the sample water.
  • the control device can perform the control process while referring to the flow rate measured by the flow meter when controlling the adjustment unit so that the flow velocity is maintained within a predetermined range.
  • the adjustment section may include a liquid-sending pump that is arranged on the flow path and adjusts the flow rate of the sample water.
  • a liquid-sending pump that is arranged on the flow path and adjusts the flow rate of the sample water. This allows the water sampling system to achieve greater flow velocities and flow rates on the flow path. Therefore, clogging of the piping forming the flow channel due to turbidity and sediments contained in the sample water is suppressed. For example, when the predetermined range is included in the range of 1 m/sec or more, such an effect becomes remarkable.
  • the use of a liquid-sending pump makes it easier to ensure sufficient pressure to send sample water downstream.
  • the adjustment unit may include a suction pump arranged downstream of a filter that filters the sample water on the flow path.
  • the water sampling system can perform suction filtration using the filter arranged on the flow path.
  • the adjustment unit may include a pressure pump arranged upstream of a filter that filters the sample water on the flow path.
  • the water sampling system can perform pressure filtration using the filter arranged on the flow path.
  • the adjustment unit includes a throttle valve arranged on the flow channel for adjusting the flow velocity of the sample water, and a drain flow channel for draining excess sample water that does not pass through the throttle valve. may contain.
  • the control device can maintain the flow rate of the sample water within a predetermined range without using a pump such as a liquid-sending pump.
  • control device may include a cleaning unit that cleans the channel on the upstream side of the throttle valve and the drainage channel with cleaning water. Accordingly, even if suspended matter, sediment, and the like contained in the sample water accumulate in the piping forming the flow path due to the water sampling process by the water sampling system, the control device can wash them away. Therefore, clogging of the piping forming the flow channel due to turbidity and sediments contained in the sample water is suppressed.
  • the control device controls the flow of the sample water in either one of a branched first flow path and a second flow path arranged downstream of the measurement section and the adjustment section in the flow path. You may provide the switching part which switches. As a result, the control device automatically switches the flow path of the sample water when the sample water is measured after the end of water sampling and periodic monitoring such as hourly, daily, monthly, etc. is performed. becomes possible. At this time, the user can also replace consumables such as filters, containers, and medicines that are arranged on the side of the channel that are not used for water sampling.
  • control unit may control the adjustment unit so that the sample water always flows through the channel for one day.
  • the water sampling system can collect the sample water obtained through the valve into the water sampling container every predetermined period of time, for example, one day.
  • the water sampling system can be used to continuously sample water at predetermined intervals for 365 days to evaluate long-term fluctuations such as hourly, daily, and monthly.
  • a control method comprises a measuring step of measuring at least one of the flow rate and flow velocity of sample water flowing through a flow path, and measuring the flow rate and flow velocity of the sample water measured in the measuring step. and a control step of controlling the flow rate of the sample water flowing through the flow path with the control step, wherein the flow rate of the sample water is maintained within a predetermined range.
  • the water sampling system can perform the water sampling process over a long period of time while constantly maintaining the flow velocity and flow rate of the sample water.
  • the water sampling system can also achieve the target value of the amount of sampled water over a long period of time while steadily sampling small amounts of sample water.
  • the water sampling system can properly collect the sample water containing the worst or maximum microbiological load without leakage.
  • the above-described water sampling method using the water sampling system makes it possible to detect sudden fluctuations in the water quality of the sample water and to detect the worst case.
  • the worst condition of water quality occurring at the time of water sampling is reflected in the sample water, and it is possible not to miss the quality risk caused by the worst situation.
  • the water collection system can collect sample water as representative and average samples that reflect the contamination status of the entire fluid of interest. As a result, it becomes easy to appropriately grasp the water quality fluctuation of the sample water and the control performance of the water treatment system.
  • FIG. 1 is a schematic configuration diagram of a water sampling system including a control device according to a first embodiment of the present disclosure
  • FIG. 2 is a functional block diagram showing a schematic configuration of a control device in FIG. 1
  • FIG. 4 is a flowchart for explaining a control method according to the first embodiment of the present disclosure
  • FIG. 2 is a schematic configuration diagram showing a first modification of the water sampling system of FIG. 1 including a control device
  • FIG. 3 is a schematic configuration diagram showing a second modification of the water sampling system of FIG. 1 including a control device
  • FIG. 11 is a schematic configuration diagram showing a third modification of the water sampling system of FIG. 1 including a control device
  • FIG. 10 is a schematic configuration diagram of a water sampling system including a control device according to a second embodiment of the present disclosure
  • FIG. 7 is a schematic view corresponding to FIG. 6 showing the flow of fluid when water sampling processing is being performed by the water sampling system of FIG. 6
  • FIG. 7 is a schematic view corresponding to FIG. 6 showing the flow of fluid when cleaning is being performed after water sampling by the water sampling system of FIG. 6
  • 7 is a schematic configuration diagram showing a modification of the water sampling system of FIG. 6 including a control device
  • Patent Document 1 also describes that in a water treatment facility, sample water passes from a biological treatment tank through a water sampling pipe and is intermittently supplied to a membrane separation tank for sample measurement. More specifically, the water sampling device positions the discharge port of the water sampling pipe above the liquid surface of the membrane separation tank for sample measurement and the biological treatment tank for water intake, and the water sampling pump means intermittently. When the water sampling pump means is stopped, residual water in the water sampling pipe flows back to the biological treatment tank due to its own weight. As a result, the inside of the water sampling pipe is backwashed. This periodic backflushing prevents clogging of the water sampling tubes. The water sampling device closes the on-off valve arranged on the water intake side of the water sampling pipe before all of the residual water flows back, thereby stopping the backflow of the residual water. This reduces the water supply load at the time of restart.
  • Non-Patent Document 1 when a large amount of collected water sample cannot be stored in a water collection container, the target virus or particles are adsorbed to a negatively charged membrane and collected, and the permeated sample water is collected. Drainage on site is also described.
  • the Bandon water sampler and the Niskin water sampler are known as typical water samplers for sampling water samples.
  • a typical water sampler is attached to the end of a rope and submerged to a desired depth in bodies of water such as pools, oceans, and rivers.
  • a typical bottle closes with a messenger falling along a rope to the bottle.
  • a typical water sampler acquires a sample at a specific timing at a point or water depth where the sample water is desired to be acquired.
  • an automatic water sampling device capable of sampling 10 mL to 10 L of sample water at programmed timing is also known.
  • Such an automatic water sampler can also refrigerate sample water that has been sampled.
  • Patent Document 1 water is intermittently fed from a biological treatment tank for water intake to a membrane separation tank for sample measurement. Clogging of the water sampling pipe is prevented by performing backwashing when water supply is stopped. Therefore, the invention described in Patent Document 1 is not suitable for applications in which sample water is constantly and continuously sampled while maintaining a steady flow rate of the sample water, and lacks such a viewpoint.
  • the water sampling time is limited within several seconds to several tens of minutes. Therefore, the analyzable range of water quality of treated water or water area is limited to that at the time of water sampling. It cannot be said that the sampled water is a representative sample suitable for the purpose of grasping the water quality in a water treatment infrastructure, a water area, or the like. River water and sewage, among others, are susceptible to runoff loads from basins, including industrial and domestic effluents, and weather. Therefore, there is a high possibility that instantaneous water sampling limited to the time of water sampling does not actually reflect water quality.
  • the automatic water sampler is for obtaining a predetermined amount of sampled water, and the speed of water sampled cannot be adjusted.
  • a maximum of 1000 L of water can be collected, but the filters used are special, and the target is limited to protozoa such as Cryptosporidium and Giardia.
  • adjustment of the sampling rate is not considered.
  • control device 10 and control method that can solve these problems will be described below. An embodiment of the present disclosure will be described with reference to the drawings.
  • control device 10 and control method described below are applicable to various fields and uses.
  • the control device 10 and the control method can be used for water sampling for grasping water quality management and treatment performance in water treatment infrastructure including water purification plants, sewage treatment plants, water reclamation facilities, seawater desalination facilities, and the like.
  • the control device 10 and the control method for example, in order to grasp the dynamics in environmental surveys such as rivers, oceans, hydrophilic areas, pools, and bathing areas, samples used for water quality inspection such as fine particles, colloidal dispersion systems, and microorganisms It can be applied to water sampling.
  • the control device 10 and the control method are applied, for example, to collecting sample water used for inspection of water quality such as fine particles, colloidal dispersion systems, and microorganisms in order to grasp the risk of microbial infection in cities covering water areas and environmental infrastructure. It is possible.
  • the control device 10 and the control method quantify the risk and compare it with a threshold that can be judged safe for the purpose of qualitative risk, safety grasp, and quality control of the liquid used for manufacturing beverages or processed foods. In order to perform verification, it can be applied to sample water used for inspection of water quality such as fine particles, colloidal dispersion systems, and microorganisms.
  • the control device 10 and the control method can be applied to sample water sampling for water quality inspection of industrial water and irrigation/agricultural water.
  • the control device 10 and the control method are used for collecting sample water used for inspection purposes such as quality risk, safety grasp, quality control, etc. of liquids used for temperature and humidity control, such as mist spraying, humidification devices, and sprinkling water. It is applicable.
  • the control device 10 and the control method can be applied to sampling of sample water used for quality control inspection such as manufacture of pharmaceuticals and artificial dialysis therapy.
  • microorganisms include, for example, protozoa, bacteria, and viruses.
  • Protozoa includes, for example, Cryptosporidium and Giardia.
  • Baceria include, for example, Escherichia coli, Staphylococcus, Vibrio cholerae, Mycobacterium tuberculosis, Helicobacter pylori, and the like.
  • Virus includes, for example, norovirus, adenovirus, enteric virus, Pepper Mild Mottle Virus (PMMoV), and the like.
  • FIG. 1 is a schematic configuration diagram of a water sampling system 1 including a control device 10 according to the first embodiment of the present disclosure.
  • the configurations and functions of the control device 10 and the water sampling system 1 according to the first embodiment will be mainly described with reference to FIG.
  • the solid lines connecting the constituent parts indicate the paths of the fluid.
  • the dashed lines connecting the components indicate the paths of electrical signals.
  • the water sampling system 1 is a system used to sample water such as treated water in a water treatment infrastructure, for example.
  • a fluid that is sampled as water sample flows in one direction through the pipe 2 .
  • the pipe 2 may form a main flow path in the water sampling system 1 or may form a bypass flow path branched from the main flow path.
  • a detachable valve 3 is attached to the side of the pipe 2 .
  • a flow path 5 is formed by a pipe continuously arranged from the detachable valve 3 to the water sampling container 4 .
  • sample water is sampled from a channel formed by a pipe 2 into a water sampling container 4 via a detachable valve 3 and a channel 5 .
  • the sample water is drawn into the water sampling container 4 by the control device 10 arranged between the valve 3 and the water sampling container 4 on the channel 5 .
  • FIG. 2 is a functional block diagram showing a schematic configuration of the control device 10 of FIG. The configuration and functions of the control device 10 will be mainly described with reference to FIGS. 1 and 2.
  • FIG. The control device 10 has a measurement section 11 , an adjustment section 12 , an input section 13 , an output section 14 , a storage section 15 and a control section 16 .
  • the measurement unit 11 measures at least one of the flow rate and flow velocity of the sample water flowing through the channel 5 .
  • the measurement unit 11 transmits the measured information to the control unit 16 .
  • the "flow rate” means, for example, the volume of sample water that passes through the piping that constitutes the channel 5 per unit time, and is expressed in units of L/sec or m 3 /sec.
  • the "flow velocity” means, for example, the flow rate divided by the cross-sectional area of the piping that constitutes the flow path 5, and is expressed in units of m/sec.
  • the measurement unit 11 includes a flowmeter 11a arranged downstream of the adjustment unit 12 in the flow path 5 and measuring the flow rate of the sample water.
  • the measurement unit 11 is not limited to this, and may include a current meter that is arranged on the channel 5 and measures the flow velocity of the sample water.
  • the adjustment unit 12 adjusts the flow velocity of the sample water flowing through the channel 5 based on the control signal received from the control unit 16. If the pipes forming the channel 5 are the same and have a constant inner diameter, the adjustment unit 12 adjusts the flow rate of the sample water flowing through the channel 5 by adjusting the flow velocity.
  • the adjustment unit 12 includes a liquid-sending pump 12a arranged upstream of the flow meter 11a in the flow path 5 and adjusting the flow velocity of the sample water.
  • the liquid-sending pump 12a sends the sample water flowing through the channel 5 to the downstream side.
  • the liquid-sending pump 12a may be, for example, a peristaltic pump (registered trademark) that sends liquid by squeezing a soft tube with a roller, or any other pump that can send predetermined sample water.
  • Either pressurization or suction may be selected as the form of the liquid-sending pump 12a depending on the properties of the sample water.
  • the adjustment unit 12 may be configured to be recombinable with either one of the pressurization and suction type liquid feed pumps 12a according to the sample water.
  • the input unit 13 includes one or more input interfaces that receive user input operations and acquire input information based on user operations.
  • the input unit 13 includes, but is not limited to, physical keys, capacitive keys, a touch screen provided integrally with the display of the output unit 14, a microphone for receiving voice input, and the like.
  • the output unit 14 includes one or more output interfaces that output information to the user.
  • the output unit 14 includes, but is not limited to, a display that outputs information as an image, a speaker that outputs information as sound, and the like.
  • the storage unit 15 is any storage including HDD (Hard Disk Drive), SSD (Solid State Drive), EEPROM (Electrically Erasable Programmable Read-Only Memory), ROM (Read-Only Memory), and RAM (Random Access Memory). Contains modules.
  • the storage unit 15 may function, for example, as a main memory device, an auxiliary memory device, or a cache memory.
  • the storage unit 15 stores arbitrary information used for the operation of the control device 10 .
  • the storage unit 15 stores system programs, application programs, and the like.
  • the storage unit 15 is not limited to being built in the control device 10, and may include an external storage module connected by a digital input/output port such as USB (Universal Serial Bus).
  • the control unit 16 includes one or more processors.
  • a "processor” is a general-purpose processor or a dedicated processor specialized for a particular process, but is not limited to these.
  • the control unit 16 is communicably connected to each component constituting the control device 10 and controls the operation of the control device 10 as a whole.
  • the control unit 16 controls the adjustment unit 12 based on at least one of the sample water flow rate and flow velocity measured by the measurement unit 11 . More specifically, the control unit 16 receives information regarding measurement transmitted from the measurement unit 11 . The control unit 16 transmits a control signal to the adjustment unit 12 based on the received measurement information. The controller 16 controls the adjuster 12 so that the flow velocity of the sample water in the channel 5 is maintained within a predetermined range.
  • the controller 16 controls the liquid feed pump 12a based on the flow rate of the sample water measured by the flowmeter 11a.
  • the control unit 16 receives flow rate information transmitted from the flow meter 11a.
  • the control unit 16 transmits a control signal to the liquid transfer pump 12a based on the received flow rate information.
  • the controller 16 controls the liquid-sending pump 12a so that the flow rate of the sample water in the channel 5 is maintained within a predetermined range.
  • the control unit 16 adjusts the sample water sampling speed and the instantaneous water sampling amount flowing through the flow path 5 while associating the liquid-sending pump 12a and the flowmeter 11a with each other.
  • control unit 16 may calculate the predetermined range based on previously acquired piping information and water sampling information.
  • pipe information includes, for example, the inner diameter of the pipe that constitutes the flow path 5, and the like.
  • water sampling information includes a water sampling period, a target value for the amount of water to be sampled, and an allowable range from the target value for the amount of water to be sampled.
  • the "predetermined range” is the flow rate range when the sample water is steadily flowed through the channel 5 so as to reach the target value of the amount of sampled water set in a preset water sampling period, for example. including.
  • the average flow rate required per second can be calculated.
  • the average flow velocity can be calculated based on the inner diameter of the piping that constitutes the flow path 5 .
  • the predetermined range may be calculated as a range of error determined based on an allowable range from a preset target value for the amount of sampled water with respect to such an average flow velocity.
  • the control unit 16 may control the adjustment unit 12 so that the sample water always flows through the channel 5 for one day while maintaining the flow rate of the sample water within a predetermined range.
  • the control unit 16 detects in real time the amount of change in the current flow velocity with respect to the calculated average flow velocity, and adjusts the adjustment unit so that the target value of the amount of water sampled set in the water sampling period set in advance is reached. 12 may be controlled.
  • the control unit 16 may calculate the current flow velocity based on the measurement information transmitted from the measurement unit 11 .
  • the control unit 16 when the control unit 16 detects in real time that the current flow velocity of the sample water in the flow path 5 has decreased from the average flow velocity and falls below a predetermined range, the sample water flows from the pipe 2 to the water sampling container 4.
  • the power of the liquid transfer pump 12a included in the adjustment section 12 may be increased.
  • the control unit 16 may calculate the amount of increase in the power of the liquid transfer pump 12a required to increase the current reduced flow velocity to the average flow velocity.
  • the control unit 16 detects in real time that the current flow velocity of the sample water in the flow path 5 has increased from the average flow velocity and exceeds a predetermined range, the sample water flows from the pipe 2 to the water sampling container 4.
  • the power of the liquid feed pump 12a included in the adjustment unit 12 may be lowered.
  • the control unit 16 may calculate the amount of decrease in the power of the liquid transfer pump 12a that is required to reduce the current increased flow velocity to the average flow velocity.
  • the control unit 16 is not limited to control based on the amount of change from the average flow velocity as described above, and may control the adjustment unit 12 by any method. For example, the control unit 16 detects in real time the amount of change per unit time in the total amount of water sampled up to now, and adjusts the adjustment unit 12 so that the target value of the sampled water amount set in a preset water sampling period is reached. may be controlled. The control unit 16 may calculate the amount of change per unit time in the total amount of sampled water up to the present based on the information regarding the measurement transmitted from the measurement unit 11 .
  • the pipe forming the flow channel 5 is clogged with turbidity and sediment contained in the sample water.
  • the piping and the adjustment unit 12 forming the flow path 5 may be designed so that the flow velocity of the sample water flowing through the flow path 5 is 1 m/sec or more.
  • the flow rate corresponding to a flow velocity of 1 m/sec is approximately 170 mL/sec (approximately 10 L/min). Therefore, in the first embodiment, the predetermined range may be included in the range of 1 m/sec or more.
  • FIG. 3 is a flowchart for explaining the control method according to the first embodiment of the present disclosure. A control method executed using the control device 10 of FIG. 1 will be mainly described with reference to FIG.
  • the control unit 16 of the control device 10 acquires piping information.
  • piping information may be input by the user using the input unit 13 and transmitted from the input unit 13 to the control unit 16 .
  • the control unit 16 acquires water sampling information.
  • water sampling information may be input by the user using the input unit 13 and transmitted from the input unit 13 to the control unit 16 .
  • step S102 the control unit 16 calculates a predetermined range based on the piping information acquired in step S100 and the water sampling information acquired in step S101.
  • step S103 the control unit 16 uses the measurement unit 11 to measure at least one of the flow rate and flow velocity of the sample water flowing through the channel 5.
  • control unit 16 controls the flow rate of the sample water flowing through the channel 5 based on at least one of the sample water flow rate and flow rate measured at step S103. In step S104, the control unit 16 controls the adjustment unit 12 so that the flow velocity of the sample water is maintained within the predetermined range calculated in step S102.
  • FIG. 4A is a schematic configuration diagram showing a first modification of the water sampling system 1 of FIG. 1 including the control device 10.
  • FIG. 4B is a schematic configuration diagram showing a second modification of the water sampling system 1 of FIG. 1 including the control device 10.
  • the solid lines connecting the components indicate the paths of the fluid.
  • the dashed lines connecting the components indicate the paths of electrical signals.
  • the water sampling system 1 collects sample water from the pipe 2 to the water sampling container 4, but is not limited to this.
  • the water sampling system 1 may have a filter 6 that captures virus particles and the like contained in the sample water in the channel 5 instead of the water sampling container 4 that collects the sample water.
  • the filter 6 filters sample water flowing through the channel 5 .
  • the filter 6 is arranged downstream of the detachable valve 3 in the flow path 5 .
  • the filter 6 may include, for example, a negatively charged membrane capable of adsorbing and collecting virus particles and the like. The sample water that has passed through the filter 6 may be drained.
  • the liquid-sending pump 12a included in the adjusting section 12 may be a pressurizing pump arranged upstream of the filter 6 that filters the sample water on the channel 5 .
  • the liquid-sending pump 12 a may supply sample water to the filter 6 by creating a pressurized state on the upstream side of the filter 6 .
  • pressure filtration may be performed.
  • the filter 6 is arranged downstream of the liquid feed pump 12a and the flow meter 11a in the flow path 5. As shown in FIG.
  • the liquid-sending pump 12a included in the adjustment section 12 may be a suction pump arranged downstream of the filter 6 that filters the sample water on the channel 5.
  • the liquid-sending pump 12 a may supply sample water to the filter 6 by creating a reduced pressure state on the downstream side of the filter 6 .
  • suction filtration may be performed.
  • the filter 6 is arranged upstream of the liquid feed pump 12a and the flow meter 11a in the flow path 5 .
  • FIG. 5 is a schematic configuration diagram showing a third modification of the water sampling system 1 of FIG.
  • the solid lines connecting the components indicate the paths of the fluid.
  • the dashed lines connecting the components indicate the paths of electrical signals.
  • the flow path 5 of the water sampling system 1 branches into a first flow path 5a and a second flow path 5b on the downstream side of the liquid-sending pump 12a and the flow meter 11a.
  • a first water sampling container 4a is arranged on the side of the first flow path 5a.
  • a second water sampling container 4b is arranged on the side of the second flow path 5b.
  • the control device 10 may have a switching section 17 in addition to the components shown in FIG.
  • the switching unit 17 may be arranged downstream of the measuring unit 11 and the adjusting unit 12 in the flow path 5 . More specifically, the switching unit 17 is arranged downstream of the liquid-sending pump 12a and the flowmeter 11a in the flow path 5 and at a branch point to the first flow path 5a and the second flow path 5b. may be Based on the control signal received from the control unit 16, the switching unit 17 switches the sample water flow to either one of the branched first channel 5a and the second channel 5b.
  • the switching unit 17 may include a first electromagnetic valve arranged immediately after the branch point in the first flow path 5a and a second electromagnetic valve arranged immediately after the branch point in the second flow path 5b.
  • the switching unit 17 is not limited to such a configuration, and may include any mechanism capable of switching the flow of sample water.
  • control unit 16 causes the sample water to always flow from the channel 5 to the first channel 5a while controlling the adjustment unit 12 based on the control method described above. At this time, the control unit 16 maintains the first electromagnetic valve on the first flow path 5a side in the open state while keeping the second electromagnetic valve on the second flow path 5b side in the closed state. The sample water flowing through the first channel 5a is collected by the first water sampling container 4a.
  • control unit 16 determines that the water sampling period preset by the user has been reached, it controls the switching unit 17 to switch the sample water flow from the first channel 5a to the second channel 5b. For example, the control unit 16 switches the first solenoid valve on the side of the first flow path 5a from the open state to the closed state, and switches the second solenoid valve on the side of the second flow path 5b from the closed state to the open state.
  • the control unit 16 always causes the sample water to flow from the channel 5 to the second channel 5b while controlling the adjustment unit 12 based on the control method described above.
  • the sample water flowing through the second channel 5b is collected by the second water sampling container 4b.
  • the user as the water quality manager inputs the water sampling period through the input unit 13 according to the sample water collection time desired by the user. For example, if the user wishes to grasp the daily water quality behavior of the sample water and collects the sample water at 9:00 am, the user can specify the water sampling period from 9:00 to 8:59 on the next day. good.
  • the control unit 16 sets the water sampling period so that sample water can be collected from 9:00 specified by the user to 8:59 of the next day.
  • the control unit 16 may sample water from the first water sampling container 4a through the first channel 5a during a water sampling period specified by the user, for example, from 9:00 to 8:59 the next day.
  • the control unit 16 controls the water sampling period from 9:00 on the next day to 8:59 on the day after the next, and the second water sampling container 4b through the second flow path 5b. You can continue to collect water.
  • the water sampling period is not limited to this, and may be arbitrarily set based on the designation by the user.
  • the control unit 16 may sample water from the first water sampling container 4a through the first channel 5a during a water sampling period specified by the user, for example, from 0:00 to 23:59. When the water sampling by the first water sampling container 4a ends, the control unit 16 continues the water sampling with the second water sampling container 4b via the second flow path 5b during the water sampling period from 0:00 to 23:59 on the next day. Water sampling may be performed.
  • the control device 10 controls the adjusting section 12 so that the flow velocity of the sample water flowing through the channel 5 is maintained within a predetermined range.
  • Such control by the controller 10 allows the water sampling system 1 to perform the water sampling process over a long period of time while constantly maintaining the flow velocity and flow rate of the sample water.
  • the water sampling system 1 can also achieve the target value of the amount of sampled water over a long period of time while steadily sampling the sample water little by little.
  • the water sampling system 1 can properly collect sample water containing the worst or maximum microbiological load without omission.
  • the water sampling method as described above by the water sampling system 1 makes it possible to detect sudden fluctuations in the water quality of the sample water and to detect the worst case.
  • the worst condition of water quality occurring at the time of water sampling is reflected in the sample water, and it is possible not to miss the quality risk caused by the worst situation.
  • the water collection system 1 can collect sample water as a representative sample and an average sample that reflects the overall contamination status of the target fluid. As a result, it becomes easy to appropriately grasp the water quality fluctuation of the sample water and the control performance of the water treatment system.
  • the water sampling system 1 contributes to capturing the effects on the water quality of membrane-filtered water, treatment processes, filtration and backwashing, and fluid accompanying physical or mechanical impacts associated with operational changes in treatment processes, etc. can do.
  • the water sampling system 1 can also be used for management related to quality assurance of water quality, such as changes in pore size and rupture due to expansion of the membrane without overlooking breakage of the membrane.
  • the water sampling system 1 can perform water sampling processing of sample water without being limited to protozoa including Cryptosporidium and Giardia while achieving a large water sampling volume such as 1000L.
  • control device 10 refers to the flow rate measured by the flowmeter 11a when controlling the adjustment unit 12 so that the flow velocity is maintained within a predetermined range. Processing can be performed.
  • the adjustment unit 12 includes the liquid-sending pump 12a that adjusts the flow rate of the sample water, so that the water sampling system 1 can achieve a higher flow rate and flow rate on the channel 5. Therefore, clogging of the piping forming the flow path 5 due to turbidity and sediments contained in the sample water is suppressed. For example, when the predetermined range is included in the range of 1 m/sec or more, such an effect becomes remarkable. In the water sampling system 1, the use of the liquid-sending pump 12a makes it easier to ensure sufficient pressure to send the sample water downstream.
  • the water sampling system 1 can perform suction filtration using the filter 6 arranged on the flow path 5 .
  • the water sampling system 1 can perform pressure filtration using the filter 6 arranged on the flow path 5 .
  • the control device 10 controls the flow of the sample water when the sample water is measured after the end of the water sampling and when periodic monitoring such as hourly, daily, monthly, etc. is performed. It is possible to automatically switch paths. At this time, the user can also replace consumables such as filters, containers, and medicines that are arranged on the side of the channel that are not used for water sampling.
  • the control unit 16 controls the adjustment unit 12 so that the sample water always flows through the channel 5 for one day, so that the water sampling system 1 can store the sample water obtained through the valve 3 for one day, for example. It is also possible to collect the water into the water sampling container 4 at predetermined intervals. For example, the water sampling system 1 can be used to continuously sample water for a predetermined period of time for 365 days, and to evaluate long-term variations such as hourly, daily, and monthly fluctuations. .
  • valve 3 Since the valve 3 is detachable, it can be removed and cleaned when the water sampling process by the water sampling system 1 is not being performed.
  • each component may be detachable. Since it is configured to be detachable, it is possible to perform work such as removing and cleaning components that are not used.
  • FIG. 6 is a schematic configuration diagram of the water sampling system 1 including the control device 10 according to the second embodiment of the present disclosure.
  • the configurations and functions of the control device 10 and the water sampling system 1 according to the second embodiment will be mainly described with reference to FIG. 6 .
  • the solid lines connecting the components indicate the paths of the fluid.
  • the dashed lines connecting the components indicate the paths of electrical signals.
  • the water sampling system 1 according to the second embodiment differs from the first embodiment in that the adjustment unit 12 of the control device 10 includes a throttle valve 12b instead of the liquid transfer pump 12a.
  • the water sampling system 1 according to the second embodiment assumes a case where the water sampling rate is low and precipitation occurs in the flow path 5 . More specifically, it is assumed that the flow velocity of the sample water flowing through the channel 5 is less than 1 m/sec.
  • Other configurations, functions, effects, modifications, and the like are the same as those of the first embodiment, and the corresponding explanations also apply to the control device 10 and the water sampling system 1 according to the second embodiment. Below, the same reference numerals are given to the same components as in the first embodiment, and the description thereof will be omitted. Differences from the first embodiment will be mainly described.
  • the adjustment unit 12 of the control device 10 includes a throttle valve 12b arranged on the flow path 5 and adjusting the flow velocity of the sample water, instead of the liquid-sending pump 12a.
  • the throttle valve 12b is configured integrally with the flowmeter 11a.
  • the measuring section 11 and the adjusting section 12 may be configured integrally as one component.
  • the measurement section 11 and the adjustment section 12 may be configured as different parts, as in the first embodiment, without being limited to this.
  • the throttle valve 12b may be configured as a component separate from the flow meter 11a.
  • the throttle valve 12b is a valve that can steplessly adjust the flow rate and flow velocity of the sample water flowing downstream by changing the throttle opening.
  • the flowmeter 11a integrated with the throttle valve 12b has a flow rate measuring function and can measure the flow rate of sample water passing through the throttle valve 12b.
  • the control unit 16 controls the throttle valve 12b based on the sample water flow rate measured by the flow meter 11a. More specifically, the control unit 16 receives flow rate information transmitted from the flow meter 11a. The control unit 16 transmits a control signal to the throttle valve 12b based on the received flow rate information. The controller 16 controls the throttle valve 12b so that the flow velocity of the sample water in the flow path 5 is maintained within a predetermined range. More specifically, the controller 16 adjusts the flow velocity and flow rate of the sample water to the downstream side by adjusting the throttle opening of the throttle valve 12b. The control unit 16 adjusts the sample water sampling rate and the instantaneous water sampling amount flowing through the channel 5 while relating the throttle valve 12b and the flowmeter 11a to each other.
  • the control unit 16 detects in real time the amount of change in the current flow velocity with respect to the calculated average flow velocity, and controls the adjustment unit 12 so that the target value for the amount of water sampled set in the preset water sampling period is reached. may be controlled.
  • the control unit 16 may calculate the current flow velocity based on the measurement information transmitted from the measurement unit 11 .
  • the throttle valve 12b included in the adjustment unit 12 is throttled. You can increase the opening.
  • the control unit 16 may calculate the amount of increase in the throttle opening of the throttle valve 12b required to increase the current reduced flow velocity to the average flow velocity.
  • the throttle valve 12b included in the adjustment unit 12 is throttled. You can lower the opening.
  • the control unit 16 may calculate the amount of decrease in the throttle opening of the throttle valve 12b that is required to reduce the current increased flow velocity to the average flow velocity.
  • the control unit 16 is not limited to control based on the amount of change from the average flow velocity as described above, and may control the adjustment unit 12 by any method. For example, the control unit 16 detects in real time the amount of change per unit time in the total amount of water sampled up to now, and adjusts the adjustment unit 12 so that the target value of the sampled water amount set in a preset water sampling period is reached. may be controlled. The control unit 16 may calculate the amount of change per unit time in the total amount of sampled water up to the present based on the information regarding the measurement transmitted from the measurement unit 11 .
  • the adjustment unit 12 may include, in addition to the throttle valve 12b, a drainage channel 12c for draining excess sample water that has not passed through the throttle valve 12b.
  • the drainage channel 12c is arranged in communication with the channel 5 so as to branch from the channel 5 on the upstream side of the throttle valve 12b. It is preferable that the drainage channel 12c be arranged so as to branch from the channel 5 at a position as close to the throttle valve 12b as possible. The closer the position where the drain channel 12c branches from the channel 5 is to the throttle valve 12b, the closer the sample water flowing through the channel 5 can be discharged to the position closer to the throttle valve 12b. In this way, the position where the drainage channel 12c branches from the channel 5 and the throttle valve 12b are close to each other, and the piping distance at which the flow rate of the sample water is reduced is shortened. can be shortened.
  • the drainage channel 12c functions as a drainage channel for draining excess sample water that does not pass through the throttle valve 12b while sample water sampling processing by the water sampling system 1 is being performed.
  • the drainage channel 12c functions as a drainage channel for draining cleaning water while cleaning water is being supplied to the channel 5 from the cleaning unit 18, which will be described later, after the water sampling process.
  • the control device 10 may have a cleaning section 18 in addition to the components shown in FIG.
  • the cleaning unit 18 cleans the channel 5 on the upstream side of the throttle valve 12b and the drain channel 12c with cleaning water.
  • the cleaning unit 18 suppresses clogging of the pipes forming the flow path 5 due to turbidity and sediments contained in the sample water.
  • the cleaning unit 18 includes a cleaning water supply source 18a, a flow path 18b extending from the supply source 18a, and an electromagnetic valve 18c arranged on the flow path 18b.
  • the cleaning section 18 may include an optional pump disposed on the flow path 18b downstream of the supply source 18a for pumping cleaning water from the supply source 18a.
  • the flow path 18b is disposed between the supply source 18a and the flow path 5 in order to join the flow path 5 downstream of the valve 3 and allow washing water to flow therein.
  • Washing water is a fluid that is supplied to wash the flow path 5 after the sample water is sampled by the water sampling system 1 .
  • the wash water may include, for example, chlorinated or ozonized disinfectants, reducing agents, alkaline agents, acid agents, and the like.
  • the flow path 18b is preferably arranged so as to merge with the flow path 5 at a position as close to the valve 3 as possible. The closer the position where the flow path 18 b joins the flow path 5 is to the valve 3 , the more the flow path 5 can be supplied with cleaning water from the upstream side to wash the flow path 5 .
  • the drain channel 12c at a position as close to the throttle valve 12b as possible, it is possible to supply cleaning water to the downstream side of the channel 5 and clean the channel 5. .
  • FIG. 7 is a schematic diagram corresponding to FIG. 6 showing the flow of fluid when water sampling processing is being performed by the water sampling system 1 of FIG. While the water sampling system 1 is performing the water sampling process, the control unit 16 keeps the solenoid valve 18c of the cleaning unit 18 closed. As a result, the wash water does not flow from the supply source 18a to the flow path 5, as the flow path 18b is indicated by the two-dot chain line in FIG.
  • the valve 3 of the water sampling system 1 remains attached to the pipe 2 and remains open.
  • the sample water is sent to the downstream side of the channel 5 using the residual pressure at the water sampling point in the pipe 2 to which the valve 3 is attached.
  • the controller 16 controls the throttle valve 12b so that the flow velocity of the sample water in the flow path 5 is maintained within a predetermined range.
  • a portion of the sample water passes through the throttle valve 12b and flows into the water sampling container 4 on the downstream side. Excess sample water that does not pass through the throttle valve 12b is drained to the outside of the water sampling system 1 through the drain channel 12c.
  • FIG. 8 is a schematic diagram corresponding to FIG. 6, showing the flow of fluid when the cleaning process is being performed after the water sampling process by the water sampling system 1 of FIG.
  • the controller 16 sets the throttle opening of the throttle valve 12b to zero to keep the throttle valve 12b closed.
  • the valve 3 of the water collection system 1 remains attached to the pipe 2 and remains closed or is removed from the pipe 2 .
  • the sample water does not flow from the pipe 2 to the water sampling container 4, as indicated by the two-dot chain line in FIG.
  • control unit 16 keeps the electromagnetic valve 18c of the cleaning unit 18 open.
  • the cleaning water is supplied from the supply source 18 a to the channel 5 via the channel 18 b to clean the channel 5 . Washing water flows downstream of the channel 5 and is discharged to the outside of the water sampling system 1 through the drain channel 12c.
  • FIG. 9 is a schematic configuration diagram showing a modification of the water sampling system 1 of FIG. 6 including the control device 10.
  • the solid lines connecting the components indicate the paths of the fluid.
  • the dashed lines connecting the components indicate the paths of electrical signals.
  • the flow path 5 of the water sampling system 1 branches into a first flow path 5a and a second flow path 5b on the downstream side of the throttle valve 12b and the flow meter 11a.
  • a first water sampling container 4a is arranged on the side of the first flow path 5a.
  • a second water sampling container 4b is arranged on the side of the second flow path 5b.
  • the control device 10 may have a switching section 17 in addition to the components shown in FIG. 2, as in the first embodiment.
  • the description of the configuration, arrangement, function, effect, etc. of the switching unit 17 in the first embodiment also applies to the switching unit 17 of the control device 10 according to the second embodiment.
  • the control unit 12 includes the throttle valve 12b and the drainage channel 12c, so that the flow rate of the sample water can be maintained within a predetermined range without using a pump such as the liquid transfer pump 12a. be.
  • the control device 10 has the cleaning unit 18, so that even if turbidity and sediment contained in the sample water accumulate in the pipes forming the flow path 5 due to the water sampling process by the water sampling system 1, they are washed away. be able to. Therefore, clogging of the piping forming the flow path 5 due to turbidity and sediments contained in the sample water is suppressed.
  • the present disclosure can be implemented as a program describing the processing content for realizing each function of the control device 10 described above, or as a storage medium recording the program. It should be understood that the scope of the present disclosure includes these as well.
  • the shape, arrangement, orientation, and number of each component described above are not limited to the contents shown in the above description and drawings.
  • the shape, arrangement, orientation, and number of each component may be arbitrarily configured as long as the function can be realized.
  • the contamination status and removal status may be grasped based on the number of living and dead microorganisms.
  • the sample water sampling period may be variable in order to enable application to the above-mentioned various fields including tap water, food, and drinking water.
  • the shape of valve 3 for water sampling may be variable.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne un dispositif de commande (10) qui comprend une unité de mesure (11) pour mesurer au moins l'un du débit et de la vitesse d'écoulement d'un échantillon d'eau s'écoulant à travers un canal d'écoulement (5), une unité de réglage (12) pour ajuster la vitesse d'écoulement de l'échantillon d'eau s'écoulant à travers le canal d'écoulement (5), et une unité de commande (16) permettant de commander l'unité de réglage (12) sur la base d'au moins l'un du débit et de la vitesse d'écoulement de l'échantillon d'eau mesuré par l'unité de mesure (11), l'unité de commande (16) commandant l'unité de réglage (12) de telle sorte que la vitesse d'écoulement de l'échantillon d'eau soit maintenue dans une plage prescrite.
PCT/JP2022/004131 2021-03-26 2022-02-02 Dispositif de commande et procédé de commande WO2022201888A1 (fr)

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JP2021054164A JP7192906B2 (ja) 2021-03-26 2021-03-26 制御装置及び制御方法
JP2021-054164 2021-03-26

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01299439A (ja) * 1988-05-27 1989-12-04 Nikkiso Co Ltd 自動減圧装置の流量制御機構
JPH0714353U (ja) * 1993-08-17 1995-03-10 日機装株式会社 自動減圧装置の圧力制御装置
JP2003337127A (ja) * 2002-05-21 2003-11-28 Meidensha Corp アンモニア計
JP2008111721A (ja) * 2006-10-30 2008-05-15 Horiba Advanced Techno Co Ltd 連続式全有機炭素濃度測定方法及びその装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01299439A (ja) * 1988-05-27 1989-12-04 Nikkiso Co Ltd 自動減圧装置の流量制御機構
JPH0714353U (ja) * 1993-08-17 1995-03-10 日機装株式会社 自動減圧装置の圧力制御装置
JP2003337127A (ja) * 2002-05-21 2003-11-28 Meidensha Corp アンモニア計
JP2008111721A (ja) * 2006-10-30 2008-05-15 Horiba Advanced Techno Co Ltd 連続式全有機炭素濃度測定方法及びその装置

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