WO2023090069A1 - 精製装置および制御方法 - Google Patents

精製装置および制御方法 Download PDF

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Publication number
WO2023090069A1
WO2023090069A1 PCT/JP2022/039624 JP2022039624W WO2023090069A1 WO 2023090069 A1 WO2023090069 A1 WO 2023090069A1 JP 2022039624 W JP2022039624 W JP 2022039624W WO 2023090069 A1 WO2023090069 A1 WO 2023090069A1
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WIPO (PCT)
Prior art keywords
container
pipe
liquid
heavy liquid
waste liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/039624
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English (en)
French (fr)
Japanese (ja)
Inventor
由雄 池澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimadzu Corp
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Shimadzu Corp
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Filing date
Publication date
Application filed by Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP2023561483A priority Critical patent/JP7639936B2/ja
Priority to US18/708,649 priority patent/US20250011203A1/en
Priority to CN202280075120.0A priority patent/CN118234571A/zh
Priority to EP22895353.5A priority patent/EP4434635A4/en
Publication of WO2023090069A1 publication Critical patent/WO2023090069A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/34—Purifying; Cleaning
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/40—Concentrating samples
    • G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/005—Processes using a programmable logic controller [PLC]
    • C02F2209/006—Processes using a programmable logic controller [PLC] comprising a software program or a logic diagram
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/11—Turbidity
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/18—Removal of treatment agents after treatment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/40—Concentrating samples
    • G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
    • G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration

Definitions

  • the present invention relates to a refiner and a control method.
  • Non-Patent Document 1 discloses a purifier that recovers microplastics contained in a mixed sample by gravity-separating a mixed sample collected from the sea using a heavy liquid.
  • the present disclosure is to provide a refiner capable of efficiently using heavy liquids for gravity separation.
  • a purification device for purifying a sample, and includes a heavy liquid reservoir, a container, a first pipe, a second pipe, and a filter unit.
  • the heavy liquid reservoir stores heavy liquid.
  • the container separates the sample by specific gravity difference using the heavy liquid supplied from the heavy liquid reservoir.
  • a first pipe discharges waste liquid from the container.
  • the second pipe sends the heavy liquid from the first pipe to the heavy liquid reservoir.
  • the filter unit is provided on the second pipe and removes contaminants from the heavy liquid discharged from the first pipe.
  • a refining device is a refining device that includes a container, a first pipe, a mesh member, a sensor, a stirring section, and a computer.
  • the vessel uses a heavy liquid to separate the sample by specific gravity difference.
  • a first pipe discharges waste liquid from the container.
  • a mesh member is provided between the container and the first pipe.
  • a sensor detects the discharge of waste liquid from the container to the first pipe.
  • the stirring section stirs the sample in the container.
  • the computer compares the discharge amount of the waste liquid detected by the sensor with a threshold value, and when it determines that the discharge amount is smaller than the threshold value, stirs the inside of the container with the stirrer.
  • a control method is a control method executed by a computer included in a purification device that purifies a sample in a container to which the heavy liquid of the heavy liquid reservoir is supplied.
  • the control method includes the steps of discharging waste liquid from the container, introducing the heavy liquid discharged from the container into a filter unit to remove contaminants from the heavy liquid, and transferring the heavy liquid that has passed through the filter unit to the heavy liquid reservoir. and a returning step.
  • a control method is a control method executed by a computer in a refining device.
  • the refiner includes a container, a first pipe, a mesh member, a sensor, a stirrer, and a computer.
  • the vessel uses a heavy liquid to separate the sample by specific gravity difference.
  • a first pipe discharges waste liquid from the container.
  • a mesh member is provided between the container and the first pipe.
  • a sensor detects the discharge of waste liquid from the container to the first pipe.
  • the stirring section stirs the sample in the container.
  • the control method comprises the steps of, after purifying the sample, discharging the waste liquid from the container through the mesh member into the first pipe, detecting the amount of waste liquid discharged from the container to the first pipe with a sensor, comparing the discharged amount of waste liquid detected by the sensor with a threshold value, and stirring the inside of the container when it is determined that the discharged amount is smaller than the threshold value.
  • the heavy liquid from which the components to be separated are removed in the container is discharged through the first pipe, and after impurities are removed by the filter unit provided in the second pipe, the heavy liquid stored in a reservoir. Therefore, it is possible to efficiently use the heavy liquid for gravity separation.
  • FIG. 1 is a schematic diagram showing the configuration of a refiner 1 according to Embodiment 1.
  • FIG. It is a figure which shows an example of the hardware constitutions of a computer. 4 is a flow chart showing processing related to filtration of heavy liquid. It is a schematic diagram showing the configuration of a refiner 1A according to Modification 1.
  • FIG. 9 is a flow chart showing a process for detecting and reducing clogging of the discharge mesh of the refining device according to Embodiment 2.
  • FIG. It is a schematic diagram showing the configuration of a refining device 1B according to Modification 2.
  • FIG. FIG. 10 is a schematic diagram showing the configuration of a refining device 1C according to Embodiment 3;
  • FIG. 1 is a diagram schematically showing a refiner 1 according to this embodiment.
  • the refining device 1 performs a process of refining a mixed sample and recovering a component to be recovered contained in the mixed sample.
  • “Purification” includes converting a mixture into a pure substance, and in this embodiment, includes obtaining a pure substance (component) to be recovered from the collected mixed sample.
  • the “mixed sample” to be purified by the refining device 1 may be any one as long as it contains the components to be recovered. and processed products such as cosmetics.
  • the “mixed sample” is exemplified by seawater and sand collected from the sea or coast.
  • the “mixed sample” is also simply referred to as the “sample”.
  • the “component” to be recovered by the refining device 1 may be any component as long as it is recovered by the refining device 1 according to this embodiment.
  • Microplastics are microscopic plastic particles, for example about 0.1 to 5 mm in length.
  • the “component” is exemplified by microplastics contained in seawater and sand collected from the sea or coast.
  • the purification device 1 includes a refiner 100 for purifying a sample and a computer 500 that controls the refiner 100.
  • the purifier 100 includes a container 50, a plurality of pipes 10 to 15, a plurality of pumps 30 to 34, a plurality of ports 61 to 64, a switching valve 41, a constant temperature stirrer 71, and a discharge pipe 25.
  • the detection mesh 21 the oxidant reservoir 110, the heavy liquid reservoir 120, the rinse liquid reservoir 130, the waste liquid reservoirs 140 and 150, the supernatant liquid reservoir 210, the heavy liquid sensor S1, and the liquid amount sensors S23 and S3B.
  • the oxidant reservoir 110 stores an oxidant for treating contaminants.
  • Contaminants are foreign substances other than the components to be recovered in the mixed sample.
  • organic contaminants having organic properties are exemplified as “contaminants”.
  • the "oxidizing agent” may be any agent that treats contaminants.
  • the "oxidizing agent” decomposes organic contaminants.
  • the "oxidizing agent” includes hydrogen peroxide solution ( H2O2 ), a mixture of hydrogen peroxide solution ( H2O2 ) and iron oxide (II) (FeO), and the like.
  • H2O2 hydrogen peroxide solution
  • H2O2 hydrogen peroxide solution
  • H2O2 mixture of hydrogen peroxide solution
  • FeO iron oxide
  • the "organic contaminants” include wood chips and plankton mixed in the seawater or sand.
  • the pipe 11 is connected to the oxidant reservoir 110 and the port 61 provided on the outer peripheral portion of the container 50 .
  • the oxidant stored in the oxidant reservoir 110 is introduced into the container 50 through the pipe 11 by driving the pump 31 arranged in the pipe 11 .
  • Pump 31 is controlled by computer 500 .
  • a mesh (not shown) is provided inside the port 61 so that the components contained in the sample are not discharged to the outside.
  • the mesh is a mesh having a mesh size capable of trapping the microplastics to be collected.
  • a specific example of the mesh is a SUS (stainless steel) wire mesh or a PTFE (Teflon (registered trademark)) membrane filter. If PTFE is used, it is desirable that it does not leak out as plastic.
  • the mesh size of the mesh is, for example, about 0.1 mm. (When targeting microplastics, the size must be such that particles of 0.1 to 5 mm do not pass.)
  • the ports 62 and 63 are assumed to have the same configuration, and the description will not be repeated.
  • the rinse liquid reservoir 130 stores the rinse liquid for cleaning the inside of the container 50 .
  • the "rinse liquid” may be any one for cleaning the inside of the container 50, and examples of the “rinse liquid” include water.
  • the “rinse liquid” introduced through the pipe 13 has a role of cleaning the inside of the container 50 and a role of diluting the oxidizing agent introduced into the container 50 .
  • the pipe 13 is connected to the rinse liquid reservoir 130 and the port 63 provided on the outer peripheral portion of the container 50 .
  • the rinse liquid stored in the rinse liquid reservoir 130 is introduced into the container 50 through the pipe 13 by driving the pump 33 arranged in the pipe 13 .
  • Pump 33 is controlled by computer 500 .
  • the heavy liquid reservoir 120 stores heavy liquid for separating the sample due to the difference in specific gravity.
  • a “heavy liquid” may be any liquid that separates a sample based on a difference in specific gravity.
  • the “heavy liquid” sediments inorganic contaminants having the properties of inorganic substances due to the difference in specific gravity.
  • “heavy liquid” includes sodium chloride (NaCl), sodium iodide (Nal), zinc chloride (ZnC12), and the like.
  • “inorganic contaminants” include sand, glass, stone, and the like.
  • the specific gravity of the “heavy liquid” is set higher than the specific gravity of the “component” to be recovered by the refiner 1 and lower than the specific gravity of the “inorganic contaminants”.
  • the specific gravity of the “heavy liquid” is greater than the specific gravity of the microplastics.
  • the specific gravity of the “heavy liquid” may be set to about 1.5 to about 1.7.
  • the pipe 12 is connected to a heavy liquid reservoir 120 and a port 62 provided on the outer peripheral portion of the container 50 .
  • the heavy liquid stored in the heavy liquid reservoir 120 is introduced into the container 50 through the pipe 12 by driving the pump 32 arranged in the pipe 12 .
  • Pump 32 is controlled by computer 500 .
  • the container 50 uses the oxidant supplied from the oxidant reservoir 110 to treat contaminants.
  • the container 50 cleans the inside of the container 50 using the rinse liquid supplied from the rinse liquid reservoir 130 .
  • the container 50 uses the heavy liquid supplied from the heavy liquid reservoir 120 to separate the mixed sample based on the difference in specific gravity.
  • the container 50 is placed on the constant temperature stirrer 71 .
  • the constant temperature stirrer 71 includes a stirrer (not shown) and a heater.
  • the constant temperature stirrer 71 is controlled by the computer 500 and stirs the sample contained in the container 50 by rotating the stirrer.
  • the constant temperature stirrer 71 corresponds to an example of a "stirring section".
  • the discharge pipe 25 is connected to the discharge port 20 provided at the top of the container 50, and discharges the supernatant liquid of the sample overflowing from the container 50 to the outside.
  • the detection mesh 21 filters the supernatant liquid of the sample discharged from the discharge pipe 25 to collect the components to be collected contained in the supernatant liquid.
  • the supernatant liquid that has passed through the detection mesh 21 is collected by the supernatant liquid reservoir 210 .
  • detection mesh 21 is a mesh having a mesh size capable of trapping the microplastics to be collected.
  • a specific example of the mesh is a SUS (stainless steel) wire mesh or a PTFE (Teflon (registered trademark)) membrane filter.
  • the mesh size of the detection mesh 21 is, for example, about 0.1 mm.
  • the port 64 is formed on the outer peripheral portion of the container 50 and is a discharge port for discharging the liquid inside the container 50 .
  • a discharge mesh M1 is provided inside the port 64 so that the components contained in the sample are not discharged out of the container 50 .
  • the discharge mesh M1 corresponds to one embodiment of a "mesh member".
  • the discharge mesh M1 may be provided between the pipe 14 and the container 50 .
  • the discharge mesh M1 is a mesh having a mesh size capable of trapping the microplastics to be collected.
  • a specific example of the mesh is a SUS (stainless steel) wire mesh or a PTFE (Teflon (registered trademark)) membrane filter.
  • the mesh size of the discharge mesh M1 is, for example, about 0.1 mm.
  • the pipe 14 is connected to the port 64 .
  • the pipe 14 discharges the heavy liquid discharged as waste liquid from the container 50 to the waste liquid reservoir 140 from the port 64 provided in the container 50 .
  • the pipe 14 corresponds to an example of "first pipe" in the present disclosure.
  • the pump 34 is provided in the pipe 14 and operated under the control of the computer 500 to suck the waste liquid in the container 50 and discharge it from the port 64 toward the waste liquid reservoir 140 or the waste liquid reservoir 150 .
  • the switching valve 41 is provided on the pipe 14 . More specifically, the switching valve 41 is controlled by the computer 500 to switch the path connected to the container 50 to one of the path connected to the waste liquid reservoir 140 and the path connected to the waste liquid reservoir 150 . That is, the switching valve 41 switches whether the waste liquid discharged from the container 50 is introduced into the waste liquid reservoir 140 or into the waste liquid reservoir 150 .
  • the waste liquid reservoir 140 stores the heavy liquid discharged from the container 50 as waste liquid.
  • the pipe 15 is provided on one side of the switching valve 41 .
  • the pipe 15 discharges the oxidizing agent and the rinse liquid discharged as waste liquid from the container 50 to the waste liquid reservoir 150 .
  • the pipe 15 also discharges the waste liquid containing seawater in the mixed sample discharged from the container 50 to the waste liquid reservoir 150 .
  • the waste liquid reservoir 150 stores the waste liquid including the oxidizing agent, the rinse liquid, and the seawater in the mixed sample discharged as the waste liquid from the container 50 .
  • the pipe 10 sends the heavy liquid from the pipe 14 to the heavy liquid reservoir 120 .
  • the pipe 10 is provided with a pump 30 and filters F1 and F2.
  • the pipe 10 corresponds to an example of "second pipe" in the present disclosure.
  • the pump 30 is controlled by the computer 500 and pumps the heavy liquid contained in the waste liquid reservoir 140 toward the heavy liquid reservoir 120 .
  • the driving force for sending the heavy liquid from the pipe 14 to the heavy liquid reservoir 120 is not necessarily limited to the pump, and the purifier 100 may be configured so that the heavy liquid is sent by its own weight, for example. In this case, an on-off valve is required instead of the pump.
  • the filters F1 and F2 remove contaminants from the heavy liquid discharged from the pipe 14.
  • the filters F1 and F2 are filtering filters for filtering contaminants.
  • the filters F1 and F2 are smaller in pore size than the mesh provided in the ports 61-64.
  • the pipe 10 is provided with filters F ⁇ b>1 and F ⁇ b>2 in descending order of pore diameter so as to allow the heavy liquid to pass therethrough. That is, the pore size of filter F2 is smaller than the pore size of filter F1.
  • the pore size of filter F1 is about 0.05 mm and the pore size of filter F2 is about 0.01 mm.
  • Filter F1 and filter F2 correspond to one example of "first filter” and "second filter”, respectively.
  • the number of filters provided in the pipe 10 may be plural as exemplified above, or may be one. However, providing a plurality of filters has the advantage of removing even smaller contaminants than using a single filter F1 with a large pore size. In addition, compared to using the filter F2 with a small pore size alone, there is an advantage that clogging due to contaminants is less likely to occur and the frequency of filter replacement can be reduced.
  • a specific example of the filter is a PTFE (Teflon (registered trademark)) membrane filter.
  • the liquid volume sensor S23 is provided near the waste liquid reservoir 140 in order to detect the liquid volume of the waste liquid stored in the waste liquid reservoir 140.
  • the liquid volume sensor S23 is, for example, a weight sensor that detects the weight of the waste liquid stored in the waste liquid reservoir 140, and is provided below the waste liquid reservoir 140.
  • FIG. A weight sensor is, for example, a load cell.
  • the detected value of the liquid volume sensor S23 is transmitted to the computer 500.
  • the computer 500 detects the amount of heavy liquid stored in the waste liquid reservoir 140 based on the detection value of the liquid amount sensor S23.
  • the computer 500 determines that the filtration of the heavy liquid is completed when the liquid amount becomes equal to or less than the threshold, and stops the pump 30 to stop the filtration.
  • the liquid level sensor S23 corresponds to an example of the "second sensor" in the present disclosure.
  • the liquid level sensor S23 may be another sensor that measures the liquid level of the waste liquid stored in the waste liquid reservoir 140.
  • it may be a liquid level detection sensor using ultrasonic waves, lasers, or the like. .
  • the liquid sensor S23 may be any sensor capable of detecting the completion of filtration of the heavy liquid in the pipe 14, so it may be a flow sensor provided in the pipe 14, for example. In this case, the flow sensor detects the flow rate of heavy liquid in the pipe 14 .
  • the computer 500 can determine that the filtration of the heavy liquid has been completed and stop the pump 30 to stop the filtration when the flow rate becomes equal to or less than the threshold.
  • the liquid volume sensor S3B is provided near the waste liquid reservoir 150 in order to detect the liquid volume of the waste liquid (including at least one of the oxidizing agent and the rinse liquid) stored in the waste liquid reservoir 150.
  • the liquid volume sensor S3B is, for example, a weight sensor that detects the weight of the waste liquid stored in the waste liquid reservoir 150, and is provided below the waste liquid reservoir 150.
  • FIG. A weight sensor is, for example, a load cell.
  • the detected value of the liquid level sensor S3B is transmitted to the computer 500.
  • FIG. The computer 500 detects the amount of waste liquid stored in the waste liquid reservoir 150 based on the detected value of the liquid amount sensor S3B.
  • the liquid level sensor S3B may be another sensor that measures the liquid level of the waste liquid stored in the waste liquid reservoir 150.
  • it may be a liquid level detection sensor using ultrasonic waves, lasers, or the like. .
  • the heavy liquid sensor S1 is a sensor for detecting whether the heavy liquid that has passed through the filters F1 and F2 maintains a quality that allows it to be reused for refining the sample.
  • the heavy liquid sensor S1 detects at least one of turbidity and concentration of the heavy liquid after passing through the filters F1 and F2.
  • the heavy liquid sensor S1 corresponds to an example of the "first sensor" in the present disclosure.
  • the heavy liquid sensor S1 is a turbidity sensor provided in the heavy liquid reservoir 120.
  • Heavy liquid sensor S1 detects the turbidity of the heavy liquid in heavy liquid reservoir 120 and sends the detected value to computer 500 .
  • heavy liquid sensor S1 is a concentration sensor
  • heavy liquid sensor S1 detects the concentration of heavy liquid in heavy liquid reservoir 120 and sends the detected value to computer 500 .
  • the computer 500 determines whether the heavy liquid stored in the heavy liquid reservoir 120 maintains a quality that allows the sample to be purified again based on the detection value of the heavy liquid sensor S1. I can judge.
  • the heavy liquid sensor S1 is provided in the pipe 10 between the filter F2 and the heavy liquid reservoir 120 to detect the turbidity and concentration of the heavy liquid recovered after passing through the filters F1 and F2.
  • the computer 500 may be realized by a general-purpose computer, or may be realized by a dedicated computer for controlling the refiner 100.
  • the computer 500 receives the detection values of the liquid volume sensors S23, S3B and the heavy liquid sensor S1, and controls the purifier 100 based on each detection value.
  • FIG. 2 is a diagram showing an example of the hardware configuration of a computer.
  • Computer 500 includes controller 5000 , display 55 , and operation unit 56 .
  • Computer 500 controls the operation of purifier 100 .
  • the computer 500 is also configured to process the detection signals transmitted from the purifier 100 and display results based on the analysis on the display 55 .
  • a display 55 and an operation unit 56 are connected to the controller 5000 .
  • the display 55 is composed of, for example, a liquid crystal panel capable of displaying images.
  • the operation unit 56 receives a user's operation input to the refiner 100 .
  • the operation unit 56 is typically composed of a touch panel, keyboard, mouse, and the like.
  • the controller 5000 has a processor 51, a memory 52, a communication interface (I/F) 53, and an input/output I/F 54 as main components. These units are communicably connected to each other via a bus.
  • the processor 51 is typically an arithmetic processing unit such as a CPU (Central Processing Unit) or MPU (Micro Processing Unit).
  • the processor 51 controls the operation of the refining device 1 by reading and executing programs stored in the memory 52 .
  • the memory 52 is realized by nonvolatile memory such as RAM (Random Access Memory), ROM (Read Only Memory), and flash memory.
  • the memory 52 stores programs executed by the processor 51, data used by the processor 51, and the like.
  • the input/output I/F 54 is an interface for exchanging various data between the processor 51 and the display 55 and operation unit 56.
  • the communication I/F 53 is a communication interface for exchanging various data with the refiner 100, and is realized by an adapter or connector.
  • the communication method may be a wireless communication method using a wireless LAN (Local Area Network) or the like, or may be a wired communication method using a USB (Universal Serial Bus) or the like.
  • the user introduces the sample into the container 50 of the refining device 1 .
  • the user puts the sample into the container 50 through an inlet (not shown).
  • the user starts controlling the refiner 100 by the computer 500 by performing a start operation using the operation unit 56 of the computer 500 .
  • the sample contained in the container 50 contains waste liquid such as seawater.
  • the computer 500 discharges the waste liquid in the container 50 to the waste liquid reservoir 150 through the port 64 and the pipes 14 and 15 by controlling the pump 34 and the switching valve 41 .
  • microplastics and the like contained in the sample to be collected remain in the container 50 without being discharged to the outside by the discharge mesh M1 included in the port 64 .
  • the computer 500 stops the pump 34 on the discharge side and controls the pump 31 to introduce the oxidant in the oxidant reservoir 110 into the container 50 via the pipe 11 and the port 61 .
  • the computer 500 controls the constant temperature stirrer 71 to rotate the stirrer provided inside the container 50 while applying constant heat to the container 50 .
  • the temperature of the container 50 and the rotation speed and rotation time of the stirrer are preset by the user.
  • an oxidation treatment is performed with an oxidizing agent, and organic contaminants contained in the sample are decomposed. It should be noted that while the sample is not necessarily heated during stirring, the decomposition by the oxidation treatment can be facilitated by maintaining the temperature of the sample at a constant temperature by heating.
  • the computer 500 controls the pump 34 and the switching valve 41 to drain the waste liquid in the container 50 contained in the sample after the organic contaminants have been decomposed through the port 64 and the pipes 14 and 15. Drain to reservoir 150 .
  • microplastics and the like contained in the sample to be collected remain in the container 50 without being discharged to the outside by the discharge mesh M1 included in the port 64 .
  • the computer 500 stops the pump 34 on the discharge side and controls the pump 33 to introduce the rinse liquid in the rinse liquid reservoir 130 into the container 50 via the pipe 13 and the port 63 . to wash. At this time, the computer 500 introduces an amount of rinse liquid preset by the user into the container 50 by controlling the suction amount of the pump 33 .
  • the computer 500 controls the pump 34 and the switching valve 41 to discharge the waste liquid in the container 50 after the rinse liquid has been introduced into the waste liquid reservoir 150 via the port 64 and the pipes 14 and 15. .
  • the inside of the container 50 is washed with the rinse liquid.
  • microplastics and the like contained in the sample to be collected remain in the container 50 without being discharged to the outside by the discharge mesh M1 included in the port 64 .
  • the computer 500 dries the sample by leaving the sample as it is for a predetermined period of time (for example, one day).
  • the computer 500 controls the pump 32 to introduce the heavy liquid in the heavy liquid reservoir 120 into the container 50 via the pipe 12 and the port 62 .
  • the computer 500 introduces an amount of heavy liquid preset by the user into the container 50 by controlling the suction amount of the pump 32 .
  • the inorganic contaminants contained in the sample settle near the bottom of the container 50 due to the difference in specific gravity.
  • the liquid level of the sample separated by specific gravity gradually rises in the container 50 , and the supernatant liquid of the sample eventually reaches the discharge port 20 of the container 50 . Then, the supernatant liquid of the sample is discharged outside through the discharge port 20 and the discharge pipe 25 .
  • the supernatant liquid of the sample discharged through the discharge pipe 25 is filtered by the detection mesh 21 and only the waste liquid is recovered by the supernatant liquid reservoir 210 .
  • On the detection mesh 21 remains microplastic, which is a component with a lighter specific gravity than the heavy liquid. Since such gravity separation takes about one day, the computer 500 controls the introduction of the heavy liquid to the sample during that time.
  • the container 50 is washed by post-processing.
  • the computer 500 controls the pump 34 and the switching valve 41 to transfer the heavy liquid in the container 50 from which the microplastics have been collected through the port 64 and the pipe 14 to the waste liquid reservoir 140 as waste liquid. discharge to Next, the computer 500 introduces the rinse liquid stored in the rinse liquid reservoir 130 into the container 50 and discharges the waste liquid in the container 50 after introduction into the waste liquid reservoir 150 . As a result, the inside of the container 50 is washed with the rinse liquid.
  • the heavy liquid stored in the heavy liquid reservoir 120 is used to purify the sample in the container 50, and after removing the components to be recovered, the heavy liquid is introduced into the pipe 10. , filters F1 and F2. As a result, contaminants can be removed from the purified heavy liquid, and the heavy liquid can be stored in the heavy liquid reservoir 120 again. That is, the heavy liquid after purification can be reused.
  • the computer 500 drives the pump 30 to introduce the heavy liquid in the waste liquid reservoir 140 into the pipe 10 and return it to the heavy liquid reservoir 120 via the filters F1 and F2. As a result, the heavy liquid after purification of the sample is filtered.
  • the computer 500 determines that the filtration of the heavy liquid is completed and stops the pump 30 when the amount of liquid in the waste liquid reservoir 140 detected by the liquid amount sensor S23 becomes equal to or less than a predetermined threshold.
  • the computer 500 determines whether the heavy liquid maintains a quality that allows it to be used again for refining the sample, based on the detection value of the heavy liquid sensor S1. Specifically, when the detection value (turbidity or concentration) of the heavy liquid sensor S1 is equal to or less than a predetermined reference value, the computer 500 determines that the heavy liquid maintains a quality that allows it to be used again for refining the sample. judge. On the other hand, if the detected value of the heavy liquid sensor S1 is greater than the predetermined reference value, the computer 500 determines that the heavy liquid does not maintain quality usable for sample purification. In this case, the computer 500 notifies an error and prompts the user to replace the heavy liquid in the heavy liquid reservoir 120 . The notification of the error is made, for example, by visual expression using the display 55 or a lamp (not shown) or by voice using a speaker (not shown).
  • FIG. 3 is a flow chart showing processing related to filtration of heavy liquid.
  • processor 51 of computer 500 extracts a sample using heavy liquid supplied from heavy liquid reservoir 120 in container 50 of refining device 1 in step (hereinafter abbreviated as ST) 02. Gravity separation is performed to recover the components to be recovered.
  • the processor 51 discharges the waste liquid from the container 50 and stores it in the waste liquid reservoir 140 .
  • the processor 51 determines whether or not the amount of liquid in the waste liquid reservoir 140 is equal to or greater than the threshold value T1. If the liquid volume is less than the threshold value T1 (NO in ST06), the processor 51 determines that there is not enough liquid volume for filtration, and terminates the process. If the liquid volume is equal to or greater than threshold value T1 (YES in ST06), processor 51 determines that there is a sufficient liquid volume for filtration, and advances the process to ST08. In ST08, the processor 51 drives the pump 30 to introduce the heavy liquid into the filters F1 and F2 of the pipe 10 to remove contaminants from the heavy liquid. The heavy liquid that has passed through the filters F1 and F2 is returned to the heavy liquid reservoir 120 .
  • the processor 51 determines whether or not the amount of liquid in the waste liquid reservoir 140 is equal to or less than the threshold T2.
  • the threshold T2 is smaller than the threshold T1 (T1>T2). If the liquid amount is greater than the threshold value T2 (NO in ST10), the processor 51 determines that the filtration is not completed, returns the process to ST10, and continues filtering the heavy liquid by the filters F1 and F2. If the liquid amount is equal to or less than the threshold value T2 (YES in ST10), the processor 51 determines that the filtration is completed, and stops the pump 30 in ST12 to stop introducing the heavy liquid to the filters F1 and F2. .
  • the processor 51 determines whether the turbidity of the heavy liquid stored in the heavy liquid reservoir 120 is equal to or less than the reference value T3. If the turbidity of the heavy liquid is equal to or less than the reference value T3 (YES in ST14), the processor 51 determines that the heavy liquid stored in the heavy liquid reservoir 120 maintains a quality that can be reused for sample purification. and terminate the process. On the other hand, if the turbidity of the heavy liquid is greater than the reference value T3 (NO in ST14), the processor 51 determines that the heavy liquid stored in the heavy liquid reservoir 120 cannot be used again for refining the sample, and ST16. proceed to In ST16, the processor 51 notifies the user of the need to replace the heavy liquid in the heavy liquid reservoir 120 from the display 55, and terminates the process.
  • the purification apparatus 1 As described above, according to the purification apparatus 1 according to the first embodiment, after the sample is purified using the heavy liquid in the heavy liquid reservoir 120, the heavy liquid discharged as the waste liquid is filtered by the filters F1 and F2. Thus, it can be returned to the heavy liquid reservoir 120 . That is, the heavy liquid can be reused.
  • the liquid volume sensor of the waste liquid reservoir 140 may be configured to detect the total liquid volume of the waste liquid reservoirs 140 and 150, for example.
  • FIG. 4 is a schematic diagram showing the configuration of a refiner 1A according to Modification 1. As shown in FIG. The refining device 1A includes a liquid volume sensor S23B instead of the liquid volume sensors S23 and S3B of the refining device 1.
  • the liquid volume sensor S23B detects the total volume of the waste liquid contained in each of the waste liquid reservoirs 140 and 150.
  • the liquid level sensor S23B is, for example, a weight sensor that detects the total weight of the waste liquid reservoirs 140,150.
  • a weight sensor is, for example, a load cell. The detected value of the liquid level sensor S23B is transmitted to the computer 500. FIG.
  • the computer 500 detects the detection value of the liquid level sensor S23B immediately before the heavy liquid is discharged from the container 50 and the detection value of the liquid level sensor S23B immediately after the heavy liquid is discharged from the container 50. are stored, and the liquid volume corresponding to each detected value is calculated.
  • the computer 500 subtracts the liquid amount corresponding to the immediately preceding detection value from the liquid amount corresponding to the immediately following detection value to calculate the liquid amount of the waste liquid stored in the waste liquid reservoir 140 . Thereafter, computer 500 drives pump 30 to perform filtration when the liquid volume is greater than or equal to threshold value T1.
  • the computer 500 determines that the filtration is completed, stops the pump 30, and stops the filtration. Therefore, the liquid level sensor S23B corresponds to an example of a “second sensor” that detects completion of filtration of the heavy liquid in the pipe 10 .
  • the purification device 1A As described above, even in the refiner 1A according to Modification 1, it is possible to detect the completion of filtration of the heavy liquid. Therefore, in the purification device 1A, as in the purification device 1 according to the first embodiment, it is possible to reuse the heavy liquid after purification of the sample.
  • the discharge mesh M1 is clogged with contaminants or the like while the oxidizing agent and/or the rinsing liquid are being discharged from the container 50, there is a risk that part of the oxidizing agent and/or the rinsing liquid will remain in the container 50. was there. In this case, the remaining oxidant and/or rinse liquid may mix with the heavy liquid introduced from the heavy liquid reservoir 120 in the container 50 .
  • the concentration of the heavy liquid discharged from the container 50 will be lower than the concentration at the time it was stored in the heavy liquid reservoir 120, and there is a possibility that the quality for reuse cannot be maintained.
  • the oxidizing agent and the heavy liquid are mixed, a chemical reaction may occur between the oxidizing agent and the heavy liquid. In this case, the chemical properties of the heavy liquid change. There is a risk that the heavy liquid will not be able to be reused.
  • the configuration of the refiner according to Embodiment 2 is the same as the configuration of refiner 1 according to Embodiment 1 shown in FIG.
  • the liquid volume sensor S23 is also used to detect the discharge of waste liquid (heavy liquid) from the container 50 to the pipe 14. That is, in the second embodiment, the liquid sensor S23 corresponds to an example of the "second sensor” and also to an example of the "third sensor".
  • the liquid volume sensor S3B is used to detect the discharge of the waste liquid (oxidizing agent or rinse liquid) from the container 50 to the pipe 14. That is, the liquid level sensor S3B corresponds to an example of the "third sensor".
  • the computer 500 calculates the unit time when the waste liquid is normally discharged with the discharge mesh M1 installed.
  • a rate of change Wp which is the amount of change in the amount of liquid in the waste liquid reservoirs 140 and 150, is calculated in advance.
  • the computer 500 calculates the change rate Wm, which is the amount of change in the liquid volume of the waste liquid reservoirs 140 and 150 per unit time, from the detection values of the liquid volume sensors S23 and S3B that are received every predetermined time (for example, one second). calculate.
  • the rate of change Wp and the rate of change Wm are positive real numbers, and the unit is g/second, for example.
  • the computer 500 detects that when the value of the rate of change Wm decreases to a predetermined rate R or less with respect to the rate of change Wp (when Wm ⁇ Wp ⁇ R), the discharge of the waste liquid is abnormal. has occurred, that is, there is a possibility that clogging has occurred in the discharge mesh M1.
  • R is a real number satisfying 0 ⁇ R ⁇ 1, and is set to an appropriate value by the user, for example.
  • the computer 500 stirs the inside of the container 50 with the stirrer.
  • contaminants and the like that have caused the clogging may be separated from the discharge mesh M1 toward the container 50 by the water flow generated by the agitation, thereby reducing the clogging.
  • the stirring is performed at a predetermined rotational speed for a predetermined period of time.
  • the rotation speed of the stirring is preferably higher than the rotation speed of stirring performed during normal purification.
  • the discharge of the waste liquid from the container 50 is stopped by stopping the pump 34 during the stirring.
  • the force of attracting contaminants and the like that have caused clogging of the discharge mesh M1 to the discharge mesh M1 side is weakened, making it easier to separate them to the container 50 side.
  • the pump 34 is started again, and clogging of the discharge mesh M1 is determined.
  • Wm ⁇ Wp ⁇ R even after performing the stirring once, it may be configured to perform stirring a predetermined number of times until Wm>Wp ⁇ R.
  • the computer 500 notifies an error if the discharged amount detected by the liquid level sensors S23 and S3B is smaller than the threshold value even after a predetermined number of times of stirring.
  • the error includes content that prompts the user to reduce the clogging of the discharge mesh M1 in a "method different from agitation".
  • the notification of the error is made, for example, by visual expression using the display 55 or a lamp (not shown) or by voice using a speaker (not shown).
  • An example of a "method different from stirring” is for the user to open the inside of the container 50 and remove the clogging of the discharge mesh M1 from the inside of the container 50 using a device such as a brush.
  • Another example of the "method different from stirring” is to backflow the waste liquid from the pipe 14 to the discharge mesh M1. The method is performed, for example, by equipment included in purifier 100 .
  • the liquid amounts of the waste liquid reservoirs 140 and 150 can be It is desirable that there is no variation due to factors other than the discharge of waste liquid from 50 . That is, in the second embodiment, it is preferable that the pump 30 is stopped while the waste liquid is being discharged from the container 50 and controlled so that the waste liquid in the waste liquid reservoir 140 is not introduced into the pipe 10 . Then, it is preferable that the pump 30 is driven and the waste liquid in the waste liquid reservoir 140 is introduced into the pipe 10 after it is confirmed that the waste liquid has been completely discharged from the container 50 .
  • FIG. 5 is a flow chart showing processing related to detection and reduction of clogging of the discharge mesh M1 in the refiner according to the second embodiment.
  • the processor 51 drives the pump 34 to start discharging the waste liquid from the container 50 to the pipe 14 through the discharge mesh M1.
  • the processor 51 initializes the number of stirring times N1 to zero.
  • the processor 51 determines whether the discharge of the waste liquid from the container 50 has been completed. Specifically, for example, based on the detected value of the liquid level sensor of the container 50 (not shown), when the liquid level of the waste liquid in the container 50 is equal to or less than the threshold value T4, it is determined that the discharge of the waste liquid from the container 50 is completed. . In this case, the processor 51 stops the pump 34 to stop draining the waste liquid from the container 50 and ends the process.
  • the processor 51 detects the amount of waste liquid discharged from the container 50 to the pipe 14 by the liquid amount sensors S23 and S3B. Specifically, the processor 51 calculates the rate of change Wm based on the detection values of the liquid level sensors S23 and S3B. In ST36, the processor 51 determines whether the amount of discharged waste liquid is smaller than the threshold. Specifically, the processor 51 determines whether Wm ⁇ Wp ⁇ R. If Wm>Wp ⁇ R (NO in ST36), the processor 51 returns the process to ST33 while continuing to discharge the waste liquid.
  • the processor 51 stops the pump 34 in ST38 to stop discharging the waste liquid from the container 50.
  • the processor 51 determines whether or not the number of stirring times N1 is equal to a predetermined number of times N2.
  • N2 is a positive integer of 1 or more.
  • the processor 51 stirs the inside of the container 50 at a predetermined rotation speed for a predetermined time in ST42.
  • the processor 51 increments the value of the number of times of stirring N1 by one.
  • the processor 51 drives the pump 34 to resume discharging the waste liquid and returns the process to ST34.
  • the processor 51 suspends the refining process in the refining device 1 in ST48.
  • the processor 51 reports an error and terminates the process.
  • the error includes content that prompts the user to reduce the clogging of the discharge mesh M1 in a "method different from agitation".
  • the samples assumed to be refined by the refining device 1 include environmental samples such as seabed mud, but in this case, there is often only one sample. That is, when the refiner 1 stops due to clogging of the discharge mesh M1, it is difficult to obtain the same sample again if all the liquid containing the sample in the container 50 is discarded and the clogging is cleared. Therefore, even if additional processing such as stirring and removal of clogging from the discharge mesh M1 by "a method different from stirring" is performed, the merit of completing the purification without losing the sample is greater.
  • the number of stirring times N1 may be configured to be initialized to 0 when the waste liquid discharged after stirring satisfies Wm>Wp ⁇ R for a predetermined time.
  • Embodiment 2 it is sufficient if there is a sensor capable of detecting the amount of waste liquid discharged from the container 50 to the pipe 14 . Therefore, for example, instead of the liquid level sensors S23 and S3B, the liquid level sensor S23B described in Modification 1 of the first embodiment may be used. That is, the liquid level sensor S23 corresponds to an embodiment of the "third sensor".
  • the waste liquid (heavy liquid , oxidizing agent, and rinse solution), it is also possible to reduce the clogging when clogging occurs in the discharge mesh M1.
  • the clogging can be similarly detected and agitated to reduce the clogging.
  • Modification 2 In Modified Example 2, an example using a flow rate sensor provided in the pipe 14 as a sensor capable of detecting the amount of waste liquid discharged from the container 50 to the pipe 14 will be described.
  • FIG. 6 is a schematic diagram showing the configuration of a refining device 1B according to Modification 2.
  • the refining device 1B includes a flow sensor S3A provided in the pipe 14 in addition to the configuration of the refining device 1 .
  • the flow rate sensor S3A detects the flow rate of the waste liquid in the pipe 14.
  • FIG. Flow sensor S3A corresponds to one embodiment of a "third sensor.” The detected value of the flow sensor S3A is sent to the computer 500.
  • the computer 500 determines that there is an abnormality in the discharge of the waste liquid from the container 50, that is, there is a possibility that the discharge mesh M1 is clogged. . Then, when the clogging of the discharge mesh M1 is detected, the clogging of the discharge mesh M1 can be reduced by stirring the inside of the container 50 as in the second embodiment.
  • the clogging elimination method of the discharge mesh M1 included in the refiners according to Embodiment 2 and Modification 2 is the filtration of heavy liquid included in common with the refiners 1 and 1B according to Embodiment 1 and Modification 1. It can be executed independently of the reuse method by .
  • FIG. 7 is a schematic diagram showing the configuration of a refining device 1C according to Embodiment 3.
  • the refining device 1C is obtained by removing the pipe 10, the pump 30, the filters F1 and F2, and the heavy liquid sensor S1 from the refining device 1, which are parts used for filtering the heavy liquid. In such a refiner 1C as well, clogging of the discharge mesh M1 can be eliminated.
  • the waste liquid (heavy liquid, oxidizing agent, or rinse liquid) can be properly discharged from the container 50 to the pipe 14 by clearing the clogging of the discharge mesh M1. That is, the heavy liquid is less likely to remain in the container 50 or mix with the remaining oxidizing agent or rinse liquid in the container 50, so that the heavy liquid can be appropriately discharged to the waste liquid reservoir 140. Possibilities increase. Therefore, it becomes easier to filter the heavy liquid stored in the waste liquid reservoir 140 and reuse it for purifying the sample.
  • a purification device is a purification device for purifying a sample, and may include a heavy liquid reservoir, a container, a first pipe, a second pipe, and a filter unit.
  • the heavy liquid reservoir stores heavy liquid.
  • the container 50 separates the sample by specific gravity difference using the heavy liquid supplied from the heavy liquid reservoir.
  • a first pipe discharges waste liquid from the container.
  • the second pipe sends the heavy liquid from the first pipe to the heavy liquid reservoir.
  • the filter unit is provided on the second pipe and removes contaminants from the heavy liquid discharged from the first pipe.
  • the heavy liquid from which the components to be separated are removed in the container is discharged through the first pipe, and after contaminants are removed by the filter unit provided in the second pipe , is stored in the heavy liquid reservoir. Therefore, it is possible to efficiently use the heavy liquid for gravity separation.
  • the purification apparatus according to Section 1 may further include a first sensor for detecting at least one of turbidity and concentration of the heavy liquid after passing through the filter unit.
  • the computer determines whether the heavy liquid that has passed through the filter unit maintains a quality that allows it to be used again for refining the sample, based on the detection value of the first sensor. can.
  • the filter unit has a first filter and a second filter provided between the first filter and the heavy liquid reservoir.
  • the pore size of the filter may be smaller than the pore size of the first filter.
  • the purification apparatus may further include a pump provided in the second pipe for introducing the heavy liquid into the heavy liquid reservoir.
  • the heavy liquid can be introduced from the waste liquid reservoir to the heavy liquid reservoir using the pump.
  • the heavy liquid discharged from the container can be temporarily stored in the waste liquid reservoir before being introduced into the second pipe for filtering the heavy liquid. After the heavy liquid has been discharged from the container, the filtration of the heavy liquid discharged from the container can be started.
  • the purification apparatus may further include a second sensor for detecting completion of filtration of the heavy liquid in the second pipe.
  • the heavy liquid discharged from the container can be temporarily stored in the waste liquid reservoir before being introduced into the second pipe for filtering the heavy liquid. After the heavy liquid has been discharged from the container, the filtration of the heavy liquid discharged from the container can be started. Moreover, according to the refiner, the mesh member prevents the components contained in the sample from being discharged from the container to the first pipe.
  • the purification apparatus according to Item 7, further comprising a third sensor for detecting discharge of waste liquid from the container to the first pipe, a stirring unit for stirring the sample in the container, and a computer.
  • the computer may compare the discharged amount of waste liquid detected by the third sensor with a threshold value, and stir the inside of the container with the stirrer when determining that the discharged amount is smaller than the threshold value.
  • the computer agitates the inside of the container when the discharge amount of the waste liquid is smaller than the threshold value, that is, when there is a possibility that the mesh member is clogged. Contaminants and the like that cause clogging of the member can be separated from the mesh member, and clogging can be reduced.
  • the third sensor may include at least one of a liquid volume sensor and a flow rate sensor.
  • stirring can be repeated until clogging of the mesh member is eliminated.
  • the computer detects when the discharge amount detected by the third sensor is smaller than the threshold even after the stirring by the stirring unit is performed a predetermined number of times. , may signal an error.
  • the refining device described in item 11 if the clogging of the mesh member is not resolved by stirring, the error is reported to the user so that the user can reduce the clogging of the mesh member by "a method different from stirring". can encourage
  • the container of the purification apparatus contains an oxidizing agent for treating some of the contaminants contained in the sample, or and the waste liquid discharged from the vessel into the first pipe may comprise a heavy liquid, an oxidizer or a rinse liquid.
  • the purification apparatus of item 12 when the heavy liquid, the oxidizing agent, or the rinse liquid is discharged from the container, even if clogging occurs in the mesh member, the clogging is agitated or by a method different from agitation. can be reduced.
  • a refining device may include a container, a first pipe, a mesh member, a sensor, a stirrer, and a computer.
  • the vessel uses a heavy liquid to separate the sample by specific gravity difference.
  • a first pipe discharges waste liquid from the container.
  • a mesh member is provided between the container and the first pipe.
  • a sensor detects the discharge of waste liquid from the container to the first pipe.
  • the stirring section stirs the sample in the container.
  • the computer compares the discharged amount of waste liquid detected by the sensor with a threshold value, and when it determines that the discharged amount is smaller than the threshold value, stirs the inside of the container with the stirrer.
  • the computer agitates the inside of the container when the discharge amount of the waste liquid is smaller than the threshold value, that is, when there is a possibility that the mesh member is clogged. Contaminants and the like that cause clogging of the member can be separated from the mesh member, and clogging can be reduced.
  • a control method is a control method executed by a computer included in a purification apparatus that purifies a sample in a container to which the heavy liquid of the heavy liquid reservoir is supplied.
  • the control method includes the steps of discharging waste liquid from the container, introducing the heavy liquid discharged from the container into a filter unit to remove contaminants from the heavy liquid, and transferring the heavy liquid that has passed through the filter unit to the heavy liquid reservoir. and returning.
  • the heavy liquid from which the components to be separated are removed in the container is discharged as waste liquid, and after the contaminants are removed by the filter unit, it is stored in the heavy liquid reservoir. Therefore, it is possible to efficiently use the heavy liquid for gravity separation.
  • a first pipe for discharging waste liquid from the container a mesh member provided between the container and the first pipe, and a mesh member from the container to the first pipe and a stirring unit for stirring the sample in the container.
  • detecting the amount of waste liquid discharged from the container to the first pipe with a sensor detecting the amount of waste liquid discharged from the container to the first pipe with a sensor; and comparing the amount of waste liquid detected by the sensor and a threshold, and determining that the discharge amount is greater than the threshold. and a step of agitating the inside of the container when it is determined to be small.
  • the computer agitates the inside of the container when the discharge amount of the waste liquid is smaller than the threshold value, that is, when there is a possibility that the mesh member is clogged. Contaminants and the like that cause clogging of the member can be separated from the mesh member, and clogging can be reduced.
  • a control method includes a container for separating a sample by specific gravity difference using a heavy liquid, a first pipe for discharging waste liquid from the container, and a container and the first pipe.
  • a refining device comprising a mesh member provided between, a sensor for detecting discharge of waste liquid from the container to the first pipe, a stirring unit for stirring the sample in the container, and a computer.
  • a control method comprising: after purifying a sample, discharging waste liquid from a container through a mesh member to a first pipe; and detecting the amount of waste liquid discharged from the container to the first pipe by a sensor. and comparing the discharge amount of the waste liquid detected by the sensor with a threshold value, and agitating the inside of the container when it is determined that the discharge amount is smaller than the threshold value.
  • the computer agitates the inside of the container when the discharge amount of the waste liquid is smaller than the threshold value, that is, when there is a possibility that the mesh member is clogged. Contaminants and the like that cause clogging of the member can be separated from the mesh member, and clogging can be reduced.
  • 1, 1A ⁇ 1C purification device 10 ⁇ 15 piping, 20 discharge port, 21 detection mesh, 25 discharge pipe, 30 ⁇ 34 pump, 41 switching valve, 50 container, 51 processor, 52 memory, 55 display, 56 operation unit, 61 to 64 ports, 71 constant temperature stirrer, 100 purifier, 110 oxidant reservoir, 120 heavy liquid reservoir, 130 rinse liquid reservoir, 140, 150 waste liquid reservoir, 210 supernatant liquid reservoir, 500 computer, 5000 controller, F1, F2 filters, 53 Communication I/F, 54 Input/output I/F, M1 Discharge mesh, S1 Heavy liquid sensor, S3A Flow sensor, S3B, S23, S23B Liquid volume sensor.

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HANNES K. IMHOF ET AL.: "A novel, highly efficient method for the separation and quantification of plastic particles in sediments of aquatic environments", LIMNOLOGY AND OCEANOGRAPHY: METHODS, vol. 10, 17 July 2012 (2012-07-17), pages 524 - 537, XP055431254, Retrieved from the Internet <URL:https://doi.org/10.4319/lom.2012.10.524> DOI: 10.4319/lom.2012.10.524
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CN118234571A (zh) 2024-06-21
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JP7639936B2 (ja) 2025-03-05
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