Refining device

Abstract

A purification apparatus (1) comprises: a container (50) for accommodating a sample; a heating device (71) disposed underneath the container, and for heating the sample accommodated in the container; a heat transfer plate (91) that is disposed between the container and the heating device, that has a first main surface thermally connected to the container, and that has a second main surface located opposite to the first main surface and thermally connected to the heating device; and a sealing member (93) disposed on the first main surface and around the container.

Description

[Technical field]

[0001] The present disclosure relates to a purification device for purifying a sample. [Background technology]

[0002] Conventionally, techniques for recovering components by purifying samples are known. For example, Non-Patent Document 1 discloses a method for recovering microplastics by purifying aqueous sediments. In the method for recovering microplastics disclosed in Non-Patent Document 1, a standpipe is attached to a container that contains aqueous sediments, and a filter holder is attached to the standpipe via a ball valve. The aqueous sediments contained in the container are stirred by a rotor placed below the container, and a separation liquid is introduced to separate the aqueous sediments. Then, the liquid level rises as more separation liquid is added, making it possible to recover microplastics. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] "A novel, highly efficient method for the separation and quantification of plastic particles in sediments of aquatic environments," [Retrieved December 10, 2021], Internet<URL:https: / / aslopubs.onlinelibrary.wiley.com / doi / epdf / 10.4319 / lom.2012.10.524> Summary of the Invention [Problem to be solved by the invention]

[0004] According to the microplastic recovery method disclosed in Non-Patent Document 1, it is possible to recover microplastics from aqueous sediments, but there is a risk that the liquid being treated, such as aqueous sediments, may leak to the outside between the container and the standpipe or through the filter holder during treatment. If the liquid leaking from the container gets onto the rotor device disposed below the container, it may cause a malfunction of the rotor device, resulting in a decrease in the accuracy of sample purification and other inconveniences.

[0005] The present disclosure has been made to solve such problems, and its purpose is to provide a technique for preventing inconvenience caused by liquid leakage during sample purification. [Means for solving the problem]

[0006] A purification device according to an aspect of the present disclosure includes a container for accommodating a sample, a heating device disposed below the container and for heating the sample accommodated in the container, a heat transfer plate disposed between the container and the heating device and having a first main surface thermally connected to the container and a second main surface thermally connected to the heating device and opposite to the first main surface, and a sealing member disposed around the container on the first main surface. a support plate disposed around the first main surface of the container so as to overlap the first main surface; Equipped with The sealing member has a heat insulating property and is disposed in the gap between the first main surface and the support plate. do. Effect of the Invention

[0007] According to the present disclosure, even if liquid leaks from a container during sample purification, the heat transfer plate and sealing member can prevent the liquid from getting onto the heating device, thereby preventing inconvenience caused by liquid leakage. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating a purification device according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing a configuration of a refiner according to an embodiment. [Diagram 3] FIG. 2 is a diagram for explaining a hardware configuration of the refining device according to the embodiment. [Figure 4] 4 is a flowchart of a refining process executed by the refining device according to the embodiment. [Diagram 5] FIG. 2 is a cross-sectional view of a refiner according to an embodiment. [Figure 6] FIG. 2 is an enlarged cross-sectional view of a portion of a refiner according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present embodiment will now be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and, in principle, descriptions thereof will not be repeated.

[0010] [Main components of the refining equipment] 1 and 2, the main configuration of a purification device 1 according to an embodiment and a purification unit 100 included in the purification device 1 will be described. Fig. 1 is a diagram showing a schematic diagram of the purification device 1 according to an embodiment. Fig. 2 is a diagram showing the configuration of the purification unit 100 according to an embodiment.

[0011] 1, the purification device 1 includes a purifier 100 for purifying a mixed sample, and a control device 500 for controlling the purifier 100. The purification device 1 according to the embodiment purifies the mixed sample and recovers components to be recovered contained in the mixed sample by controlling the purifier 100 with the control device 500. "Purification" includes extracting pure substances (components) from a mixture.

[0012] The "mixed sample" to be refined by the refining device 1 may be anything that contains the components to be recovered. For example, the "mixed sample" may be seawater and sand collected from the sea or the coast, or processed products such as food and cosmetics. In the embodiment, the "mixed sample" is exemplified by seawater and sand collected from the sea or the coast. In the following, the "mixed sample" may also be simply referred to as a "sample".

[0013] The "components" to be collected by the refining apparatus 1 may be any components that can be collected by the refining apparatus 1. For example, the "components" include microplastics, which are fine plastic particles having a size of 5 mm or less. In the embodiment, the "components" are exemplified by microplastics contained in seawater and sand collected from the ocean or coast.

[0014] As shown in Figures 1 and 2, the purifier 100 includes a container 50 for containing a sample, pipes 11-22, pumps 31-33, solenoid valves 41-43, ports 61-64, a stirrer 71, an agitator 72, a discharge pipe 80, a decomposition liquid reservoir 110, a heavy liquid reservoir 120, a rinse liquid reservoir 130, waste liquid reservoirs 140, 150, a detection filter 210, a supernatant liquid reservoir 215, and a case 300.

[0015] The container 50 includes a first member 51 and a second member 52 located above the first member 51, and can be separated into the first member 51 and the second member 52. A user can store a sample inside the first member 51 by separating the second member 52 from the first member 51, and can store a sample inside the container 50 by connecting the second member 52 to the first member 51 using a fixture (not shown) or the like. In the container 50 according to the embodiment, the first member 51 is configured in a cylindrical shape having a circular bottom surface. Note that the bottom surface of the first member 51 is not limited to a circular shape, and may have other shapes such as a polygonal shape or an ellipse.

[0016] The pipe 11 connects the decomposition liquid reservoir 110 and the solenoid valve 41. The pipe 12 connects the solenoid valve 41 and the pump 31. The pipe 13 connects the pump 31 and a port 61 provided on the outer periphery of the container 50. In this way, the decomposition liquid reservoir 110 and the port 61 of the container 50 are connected by the pipes 11, 12, and 13 via the solenoid valve 41 and the pump 31.

[0017] Pipe 14 connects the heavy liquid reservoir 120 and the solenoid valve 42. Pipe 15 connects the solenoid valve 42 and the pump 32. Pipe 16 connects the pump 32 and a port 62 provided on the outer periphery of the container 50. In this way, the heavy liquid reservoir 120 and the port 62 of the container 50 are connected by the pipes 14, 15, and 16 via the solenoid valve 42 and the pump 32.

[0018] The pipe 17 connects the rinse liquid reservoir 130 and the solenoid valve 41. That is, the solenoid valve 41 is connected to the decomposition liquid reservoir 110 by the pipe 11, while the solenoid valve 41 is connected to the decomposition liquid reservoir 110 by the pipe 17. 7 The rinse liquid reservoir 130 is also connected to the rinse liquid reservoir 130 via the solenoid valve 41 and the pump 31. In this manner, the rinse liquid reservoir 130 and the port 61 of the container 50 are connected to each other via the pipes 17, 12, and 13.

[0019] The pipe 18 connects the rinse liquid reservoir 130 and the solenoid valve 42. That is, the solenoid valve 42 is connected to the heavy liquid reservoir 120 by the pipe 14, and is also connected to the rinse liquid reservoir 130 by the pipe 18. In this manner, the rinse liquid reservoir 130 and the port 62 of the container 50 are connected by the pipes 18, 15, and 16 via the solenoid valve 42 and the pump 32.

[0020] The pipe 19 connects the waste liquid reservoir 140 and the solenoid valve 43. The pipe 20 connects the solenoid valve 43 and the pump 33. The pipe 21 connects the pump 33 and a port 63 provided on the outer periphery of the container 50. In this manner, the waste liquid reservoir 140 and the port 63 of the container 50 are connected by the pipes 19, 20, and 21 via the solenoid valve 43 and the pump 33.

[0021] The pipe 22 connects the pump 33 to a port 64 provided on the outer periphery of the container 50. That is, the pump 33 is connected to the port 63 of the container 50 by the pipe 21, and is also connected to the port 64 of the container 50 by the pipe 22. In this manner, the waste liquid reservoir 140 and the port 64 of the container 50 are connected by the pipes 19, 20, and 22 via the solenoid valve 43 and the pump 33.

[0022] The pipe 23 connects the waste liquid reservoir 150 and the solenoid valve 43. That is, the solenoid valve 43 is connected to the waste liquid reservoir 140 by the pipe 19, and is also connected to the waste liquid reservoir 150 by the pipe 23. In this manner, the waste liquid reservoir 150 and the port 63 of the container 50 are connected by the pipes 23, 20, and 21 via the solenoid valve 43 and the pump 33. Moreover, the waste liquid reservoir 150 and the port 64 of the container 50 are connected by the pipes 23, 20, and 22 via the solenoid valve 43 and the pump 33.

[0023] The decomposition liquid reservoir 110 stores a decomposition liquid for treating impurities. The "impurities" are foreign matter in the mixed sample other than the components to be collected. In the embodiment, the "impurities" are exemplified by organic impurities having organic properties. The "decomposition liquid" may be any liquid that can decompose the impurities. In the embodiment, the "decomposition liquid" decomposes the organic impurities. For example, the "decomposition liquid" may be an oxidizing agent such as hydrogen peroxide (H2O2) or a mixture of hydrogen peroxide (H2O2) and iron oxide (II) (FeO). When the "mixed sample" is seawater and sand, the "organic impurities" may be wood chips and plankton mixed in the seawater or sand.

[0024] The heavy liquid reservoir 120 stores a heavy liquid for separating samples by difference in specific gravity. The "heavy liquid" may be any liquid that separates samples by difference in specific gravity. In the embodiment, the "heavy liquid" causes inorganic impurities having inorganic properties to settle by difference in specific gravity. For example, the "heavy liquid" may be sodium chloride (NaCl), sodium iodide (Nal), zinc chloride (ZnCl), or the like.l 2) and so on. When the "mixed sample" is seawater and sand, the "inorganic impurities" include sand, glass, and stones. The specific gravity of the "heavy liquid" is determined by the circulation of the purification device 1. Revenue The specific gravity of the "heavy liquid" is set to be greater than the specific gravity of the target "component" and less than the specific gravity of the "inorganic impurities." For example, when the "component" to be recovered by the refining device 1 is microplastics and the "inorganic impurities" are sand, glass, stones, etc., the specific gravity of the "heavy liquid" may be set to be greater than the specific gravity of the microplastics and less than the specific gravity of the sand, glass, stones, etc. Specifically, the specific gravity of the "heavy liquid" may be set to be about 1.5 to about 1.7.

[0025] The rinse liquid reservoir 130 stores a rinse liquid for cleaning the inside of the container 50. The "rinse liquid" may be any liquid that can be used to clean the inside of the container 50. For example, the "rinse liquid" may be water. The "rinse liquid" has a role of diluting the decomposition liquid introduced into the container 50, in addition to cleaning the inside of the container 50.

[0026] The waste liquid reservoirs 140 and 150 store waste liquids such as the heavy liquid discharged from the container 50, the rinse liquid, and seawater contained in the mixed sample.

[0027] The pump 31 introduces the decomposition liquid sucked from the decomposition liquid reservoir 110 or the rinsing liquid sucked from the rinsing liquid reservoir 130 into the container 50 via the port 61 under the control of the control device 500 .

[0028] The pump 32 introduces the heavy liquid sucked from the heavy liquid reservoir 120 or the rinsing liquid sucked from the rinsing liquid reservoir 130 into the container 50 via the port 62 under the control of the control device 500 .

[0029] The pump 33 , under the control of the control device 500 , draws in the waste liquid from the container 50 via the port 63 or the port 64 , and discharges the waste liquid into the waste liquid reservoir 140 or the waste liquid reservoir 150 .

[0030] Based on the control of the control device 500, the solenoid valve 41 switches the path connected to port 61 between the path between the decomposition liquid reservoir 110 and port 61 of the container 50 (path via pipes 11, 12, and 13) and the path between the rinsing liquid reservoir 130 and port 61 of the container 50 (path via pipes 17, 12, and 13).

[0031] Based on the control of the control device 500, the solenoid valve 42 switches the path connected to port 62 between the path between the heavy liquid reservoir 120 and port 62 of the container 50 (path via piping 14, 15, 16) and the path between the rinse liquid reservoir 130 and port 62 of the container 50 (path via piping 18, 15, 16).

[0032] Based on the control of the control device 500, the solenoid valve 43 switches the path connected to the ports 63, 64 between the path between the waste liquid reservoir 140 and the ports 63, 64 of the container 50 (the path via pipes 19, 20, 21 or the path via pipes 19, 20, 22) and the path between the waste liquid reservoir 150 and the ports 63, 64 of the container 50 (the path via pipes 23, 20, 21 or the path via pipes 23, 20, 22).

[0033] The port 61 is an example of a "first port." The port 61 introduces the decomposition liquid in the decomposition liquid reservoir 110 or the rinsing liquid in the rinsing liquid reservoir 130 sucked by the pump 31 into the container 50. The port 62 is an example of a "second port." 2 introduces the heavy liquid in the heavy liquid reservoir 120 or the rinsing liquid in the rinsing liquid reservoir 130 sucked by the pump 32 into the container 50. The ports 63 and 64 are examples of "discharge ports." The ports 63 and 64 discharge the waste liquid in the container 50 sucked by the pump 33 into the waste liquid reservoir 140 or the waste liquid reservoir 150.

[0034] Filters (not shown) are provided inside the ports 61 to 64 to prevent components contained in the sample from being discharged from the container 50. The filters are meshes having mesh sizes large enough to trap the microplastics to be collected. For example, the filters (mesh) are wire meshes made of SUS (Steel Use Stainless) or membrane filters made of PTFE (polytetrafluoroethylene) (Teflon (registered trademark)). When microplastics are to be collected, the mesh size of the filter (mesh) needs to be large enough to block particles of 0.1 to 5.0 mm, and is preferably about 0.1 mm.

[0035] Stirrer 71 is an example of a "heating device." Stirrer 71 is, for example, a magnetic thermostatic stirrer, and is disposed below container 50. Stirrer 71 generates a magnetic force based on the control of control device 500, thereby rotating stirrer 72 provided in container 50. Stirrer 72 rotates or vibrates due to the magnetic force received from stirrer 71, thereby stirring the sample in container 50.

[0036] Furthermore, stirrer 71 applies heat to container 50 from below based on the control of control device 500, thereby maintaining a constant temperature of the sample in container 50. The temperature of stirrer 71 is set to about 60°C to about 70°C, and the liquid in container 50 heated by stirrer 71 according to the set temperature is maintained at about 50°C. Note that while the refining apparatus 1 according to the embodiment uses stirrer 71 as the "heating device," a device that simply applies heat to the sample in container 50 without stirring the sample may also be used as the "heating device."

[0037] The discharge pipe 80 is an example of a “discharge part.” The discharge pipe 80 is connected to the discharge port 55 provided at the top of the container 50, and discharges the supernatant liquid of the sample that overflows from the container 50 to the outside.

[0038] The detection filter 210 filters the supernatant of the sample discharged from the discharge pipe 80, thereby recovering the components to be recovered that are contained in the supernatant. The supernatant that has passed through the detection filter 210 is recovered by a supernatant reservoir 215. The detection filter 210 is a mesh having mesh sizes large enough to trap the microplastics to be recovered. For example, the detection filter 210 (mesh) may be made of a SUS wire mesh or PTF. Made of E When microplastics are to be collected, the mesh size of the detection filter 210 (mesh) must be large enough to block particles of 0.1 to 5.0 mm, and is preferably about 0.1 mm.

[0039] The case 300 houses the container 50 and the stirrer 71. The case 300 has openings 310, 320, and 330 in which the pumps 31, 32, and 33 are disposed, respectively.

[0040] The control device 500 may be realized by a general-purpose computer, or may be realized by a computer dedicated to controlling the refiner 100. The control device 500 controls the pumps 31-33, the solenoid valves 41-43, and the stirrer 71 in the refiner 100.

[0041] The pumps 31 to 33 each include a motor (not shown) and a valve (not shown). The control device 500 controls the motor. The motor opens and closes the valve under the control of the control device 500. In this way, the pumps 31 to 33 suck in or discharge various liquids.

[0042] The solenoid valves 41 to 43 each include a valve (not shown). The control device 500 controls the valve to open or close the valve. In this way, the solenoid valves 41 to 43 switch the paths through which various liquids pass.

[0043] Stirrer 71 includes a motor (not shown), a magnet (not shown), and a heater (not shown). Control device 500 controls the motor. The motor rotates the magnet under the control of control device 500. As a result, stirrer 72 in container 50 rotates due to the magnetic force of the magnet. Furthermore, control device 500 applies a certain amount of heat to container 50 by operating a heater (not shown).

[0044] [Hardware configuration of purification equipment] The hardware configuration of the refining device 1 according to the embodiment will be described with reference to Fig. 3. Fig. 3 is a diagram for explaining the hardware configuration of the refining device 1 according to the embodiment. As shown in Fig. 3, the control device 500 includes, as main hardware elements, a calculation device 501, a memory 502, a communication device 503, a display device 504, an input device 505, a data reading device 506, and a storage 510.

[0045] The arithmetic device 501 is a computer that reads out programs (for example, a control program 511 and an OS (Operating System) 513) stored in the storage 510, and deploys and executes the read out programs in the memory 502. For example, the arithmetic device 501 executes a refining process (described later in FIG. 4) for controlling the refiner 100 by executing the control program 511. The arithmetic device 501 is configured, for example, with a CPU (Central Processing Unit), an FPGA (Field Programmable Gate Array), a GPU (Graphics Processing Unit), or an MPU (Multi Processing Unit). The arithmetic device 501 may be configured with a processing circuitry.

[0046] The memory 502 provides a storage area for temporarily storing program code, work memory, etc., when the arithmetic device 501 executes any program. The memory 502 is configured with a volatile memory such as a DRAM (Dynamic Random Access Memory) or an SRAM (Static Random Access Memory), or a non-volatile memory such as a ROM (Read Only Memory) or a flash memory.

[0047] The communication device 503 transmits and receives data to and from other devices via a network (not shown). The communication device 503 supports any communication method, such as Ethernet (registered trademark), wireless LAN (Local Area Network), Bluetooth (registered trademark), etc.

[0048] The display device 504 is configured, for example, by an LCD (Liquid Crystal Display) or the like, and displays a program design screen, an alert screen in the event of an abnormality, and the like.

[0049] The input device 505 is composed of, for example, a keyboard or a mouse, and is used by a user to input design information, etc., when designing a program. The input device 505 may include a start switch for starting the execution of the purification process by the arithmetic device 501.

[0050] The data reader 506 reads out data stored in a recording medium 507. The recording medium 507 may be any medium capable of recording various types of data, such as a CD (Compact Disc), a DVD (Digital Versatile Disc), or a USB (Universal Serial Bus) memory.

[0051] The storage 510 provides a storage area for storing various data necessary for the refining process and the like. The storage 510 is configured, for example, with a non-volatile memory device such as a hard disk drive (HDD) or a solid state drive (SSD). The storage 510 stores a control program 511, control data 512, and an OS 513.

[0052] The control program 511 is a program in which the details of the purification process are described, and is executed by the arithmetic device 501. The control program 511 may be designed by a user using the input device 505, may be read from a recording medium 507 by a data reading device 506, or may be obtained by the communication device 503 from another device such as a server via a network.

[0053] The control data 512 is data used when the arithmetic device 501 executes the control program 511. For example, the control data 512 includes data such as setting values ​​for controlling the pumps 31 to 33, the solenoid valves 41 to 43, and the stirrer 71. The control data 512 may be input by a user using the input device 505, may be read from the recording medium 507 by the data reading device 506, or may be obtained by the communication device 503 from another device such as a server via a network.

[0054] The OS 513 provides basic functions for the arithmetic device 501 to execute various processes.

[0055] [Sample purification process] Next, the purification process of a sample performed by the purification device 1 will be described with reference to Fig. 4. Fig. 4 is a flowchart of the purification process performed by the purification device 1 according to the embodiment. Each step shown in Fig. 4 is realized by the arithmetic device 501 of the control device 500 executing the OS 513 and the control program 511. In the figure, "S" is used as an abbreviation for "STEP."

[0056] As preparation, the user introduces a sample into the container 50 of the purification device 1. For example, the user opens the container 50 by separating the first member from the second member, and introduces the sample into the inside of the container 50. After that, the user performs a start operation using the input device 505 of the control device 500, thereby starting the control of the purifier 100 by the control device 500.

[0057] 4, when the control of the purifier 100 by the control device 500 starts, the control device 500 controls the pump 33 and the solenoid valve 43 to discharge the waste liquid in the container 50 through the pipes 20-23 and the ports 63, 64 to the waste liquid reservoir 150 (S1). Note that microplastics and the like to be recovered contained in the sample are not discharged to the outside by the filters provided inside the ports 63, 64, and remain in the container 50.

[0058] Next, the control device 500 stops the pump 33 on the discharge side, and controls the pump 31 and the solenoid valve 41 to introduce the decomposition liquid in the decomposition liquid reservoir 110 into the container 50 through the pipes 11 to 13 and the port 61 (S2).

[0059] Next, the control device 500 controls the stirrer 71 to rotate the stirrer 72 provided in the container 50 while applying a constant heat to the container 50, thereby stirring the sample (S3). The temperature of the container 50 and the rotation speed and rotation time of the stirrer 72 are preset by the user. By stirring the sample in this manner, an oxidation process is performed by the oxidizing agent, and organic impurities contained in the sample are decomposed. Note that, while heating is not necessarily required when stirring the sample, maintaining the temperature of the sample at a constant temperature by heating facilitates decomposition by oxidation process.

[0060] Next, the control device 500 controls the pump 33 and the solenoid valve 43 to discharge the waste liquid contained in the sample after the organic impurities have been decomposed from the container 50 to the waste liquid reservoir 150 via the pipes 20-23 and the ports 63, 64 (S4). Note that microplastics and other substances to be recovered contained in the sample remain in the container 50 without being discharged to the outside due to the filters provided inside the ports 63, 64.

[0061] Next, the control device 500 stops the pump 33 on the discharge side, and controls the pump 31 and the solenoid valve 41 to introduce the rinsing liquid in the rinsing liquid reservoir 130 into the container 50 via the pipes 17, 12, 13 and the port 61, thereby cleaning the inside of the container 50 (S5). At this time, the control device 500 controls the suction amount of the pump 31 to introduce the amount of rinsing liquid preset by the user into the container 50.

[0062] Next, the control device 500 controls the pump 33 and the solenoid valve 43 to discharge the waste liquid in the container 50 after the rinsing liquid has been introduced into the waste liquid reservoir 150 via the pipes 20-23 and the ports 63, 64 (S6). This causes the inside of the container 50 to be cleaned with the rinsing liquid. Note that microplastics and the like contained in the sample and to be collected remain in the container 50 without being discharged to the outside by the filters provided inside the ports 63, 64. Note that thereafter, the control device 500 may dry the sample by leaving it as it is for a predetermined period of time (for example, one day).

[0063] Next, the control device 500 controls the pump 32 and the solenoid valve 42 to introduce the heavy liquid from the heavy liquid reservoir 120 into the container 50 via the pipes 14-16 and the port 62 (S7). At this time, the control device 500 controls the suction amount of the pump 32 to introduce the amount of heavy liquid that is preset by the user into the container 50.

[0064] Thereafter, the control device 500 leaves the sample as it is for a predetermined period of time (for example, 1 to 3 hours) (S8). When the heavy liquid is introduced into the sample in the container 50 in this manner and left as it is, inorganic impurities contained in the sample settle near the bottom of the container 50 due to the difference in specific gravity.

[0065] Next, the control device 500 again controls the pump 32 and the solenoid valve 42 to introduce the heavy liquid from the heavy liquid reservoir 120 into the container 50 again via the pipes 14-16 and the port 62 (S9). At this time, the control device 500 controls the suction amount of the pump 32 to introduce an amount of heavy liquid preset by the user into the container 50. When the heavy liquid is introduced again into the sample in the container 50 in this manner, the liquid level of the gravity-separated sample gradually rises in the container 50, and the supernatant liquid of the sample eventually reaches the discharge port 55 of the container 50. The supernatant liquid of the sample is then discharged to the outside via the discharge port 55 and the discharge pipe 80.

[0066] The supernatant liquid of the sample discharged through the discharge pipe 80 is filtered by the detection filter 210, and only the waste liquid is collected by the supernatant liquid reservoir 215. Microplastics, which are components with a lower specific gravity than the heavy liquid, remain in the detection filter 210.

[0067] After the microplastics are collected by refining the sample, the control device 500 washes the container 50 as a post-processing. Specifically, the control device 500 controls the pump 33 and the solenoid valve 43 to discharge the waste liquid in the container 50 after the microplastics are collected to the waste liquid reservoir 140 via the pipes 19 to 22 and the ports 63 and 64 (S10).

[0068] Next, the control device 500 stops the pump 33 on the discharge side, and controls the pump 32 and the solenoid valve 42 to introduce the rinsing liquid in the rinsing liquid reservoir 130 into the container 50 via the pipes 18, 15, 16 and the port 62, thereby cleaning the inside of the container 50 (S11). At this time, the control device 500 controls the suction amount of the pump 32 to introduce the amount of rinsing liquid preset by the user into the container 50.

[0069] Next, the control device 500 controls the pump 33 and the solenoid valve 43 to discharge the waste liquid in the container 50 after the rinsing liquid has been introduced thereinto, via the pipes 19 to 22 and the ports 63 and 64, to the waste liquid reservoir 140 (S12). As a result, the inside of the container 50 is cleaned with the rinsing liquid.

[0070] As described above, according to the refining device 1 of the embodiment, the control device 500 automatically introduces the decomposition liquid and the heavy liquid into the sample contained in the container 50 at an appropriate timing and for an appropriate period of time, and also discharges the waste liquid from the container 50. Therefore, the user does not need to introduce the decomposition liquid and the heavy liquid into the container 50 or discharge the waste liquid from the container 50 by himself. This eliminates the need for the user to take time and effort, and there is no risk of variation in the accuracy of microplastics recovery depending on the skill of the user, and the user can purify the sample with high accuracy without time and effort.

[0071] Furthermore, according to the refining device 1 of the embodiment, the control device 500 automatically cleans the container 50 used after collecting the microplastics. Therefore, the user does not need to clean the container 50 by himself / herself.

[0072] [Support structure] As described above, during sample purification, the sample in the container 50 is stirred by the stirrer 71 disposed below the container 50 while heat is applied to the sample. Here, it must be considered that during sample purification, the liquid being processed may leak from the container 50 to the outside. For example, as shown in FIG. 2, the container 50 can be separated into a first member 51 and a second member 52, but liquid may leak from the connection between the first member 51 and the second member 52, or from ports 63 and 64 for discharging waste liquid. If the liquid leaking from the container 50 gets on the stirrer 71 disposed below the container 50, there is a risk of problems such as a decrease in the accuracy of sample purification due to malfunction of the stirrer 71.

[0073] Therefore, the refining device 1 according to the embodiment is configured to prevent inconveniences caused by the above-mentioned liquid leakage. Hereinafter, prevention of liquid leakage in the refining device 1 according to the embodiment will be described with reference to Figs. 5 and 6.

[0074] Fig. 5 is a cross-sectional view of the refiner 100 according to the embodiment. Fig. 6 is an enlarged cross-sectional view of a part of the refiner 100 according to the embodiment. Note that Fig. 5 shows a cross-sectional view of the refiner 100 shown in Fig. 2 cut in the up-down direction (for example, vertical direction). Fig. 6 also shows an enlarged view of the dashed line portion S shown in Fig. 5.

[0075] 5 and 6, the refiner 100 of the refinement device 1 further includes a support part 90. The support part 90 is provided inside the case 300, and includes a heat transfer plate 91, a support plate 92, and a sealing member 93.

[0076] The heat transfer plate 91 is disposed between the bottom surface of the container 50 and the top surface of the stirrer 71, and a first main surface 91A (e.g., the front surface) of the heat transfer plate 91 is thermally connected to the bottom surface of the container 50, while a second main surface 91B (e.g., the back surface) of the heat transfer plate 91 is thermally connected to the top surface of the stirrer 71. Specifically, the first main surface 91A contacts the bottom surface of the container 50, and / or the second main surface 91B contacts the top surface of the stirrer 71. The heat transfer plate 91 is made of a non-magnetic material having heat transfer properties, such as aluminum. As a result, the magnetic force from the stirrer 71 is transferred to the stirrer 72 in the container 50 via the heat transfer plate 91, causing the stirrer 72 to rotate, and the sample in the container 50 is efficiently heated by the heat from the stirrer 71.

[0077] The support plate 92 is disposed above the first main surface 91A of the heat transfer plate 91, and is disposed so as to overlap the first main surface 91A around the periphery of the container 50 on the first main surface 91A of the heat transfer plate 91. Specifically, the support plate 92 has an opening 92A formed so as to surround the bottom surface of the container 50. The area of ​​the opening 92A is larger than the area of ​​the bottom surface of the container 50. As shown in FIG. 2, the bottom surface of the container 50 according to the embodiment (the bottom surface of the first member 51) is configured as a circle, but the opening 92A is configured as a circle having an area larger than the bottom surface of the container 50 (the bottom surface of the first member 51).

[0078] The container 50 is disposed approximately at the center of the opening 92A, and is placed on the first main surface 91A of the heat transfer plate 91 via the opening 92A. The opening 92A is not limited to a circular shape, and may have other shapes, such as a polygonal shape or an ellipse. Furthermore, the opening 92A may be formed to match the shape of the bottom surface of the first member 51. For example, when the bottom surface of the first member 51 is configured as a rectangle, the opening 92A may be configured as a rectangle having an area larger than that of the bottom surface of the first member 51.

[0079] The support plate 92 is made of a material having a relatively low thermal conductivity, such as SUS (Steel Use Stainless), and has a lower thermal conductivity than the heat transfer plate 91, which is made of aluminum.

[0080] The sealing member 93 is disposed around the container 50 on the first main surface 91A of the heat transfer plate 91. Specifically, as shown in Fig. 6, the sealing member 93 is disposed so as to be interposed in a gap between the first main surface 91A and the support plate 92. Since the opening 92A of the support plate 92 according to the embodiment is circular, the gap between the first main surface 91A and the support plate 92 is also configured in an annular shape. That is, the sealing member 93 is disposed in an annular shape in the gap between the first main surface 91A and the support plate 92. The sealing member 93 is made of a material having heat insulating properties, such as silicon.

[0081] According to the refiner 100 having the above-mentioned configuration, since the heat transfer plate 91 is interposed between the container 50 and the stirrer 71, even if liquid leaks from the container 50 during purification of the sample, the heat transfer plate 91 can prevent the liquid from getting on the stirrer 71. Furthermore, since the sealing member 93 having thermal insulation is provided in the gap between the heat transfer plate 91 and the support plate 92, even if liquid leaks from the container 50 during purification of the sample, the sealing member 93 can prevent the liquid from entering the gap between the heat transfer plate 91 and the support plate 92. That is, the liquid leaked from the container 50 remains on the first main surface 91A of the heat transfer plate 91 at the opening 92A. Furthermore, since the sealing member 93 has thermal insulation, the heat of the heat transfer plate 91 heated by the stirrer 71 is less likely to be transmitted to the support plate 92, so that the heat can be efficiently transmitted to the container 50.

[0082] [Aspects] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0083] (Item 1) A purification device according to one embodiment includes a container for containing a sample, a heating device disposed below the container for heating the sample contained in the container, a heat transfer plate disposed between the container and the heating device and having a first main surface thermally connected to the container and a second main surface thermally connected to the heating device and opposite the first main surface, and a sealing member disposed around the container on the first main surface.

[0084] According to the purification device described in paragraph 1, even if liquid leaks from a container during sample purification, the heat transfer plate and sealing member can prevent the liquid from getting onto the heating device, thereby preventing inconvenience caused by liquid leakage.

[0085] (2) The first main surface is in contact with the container, and / or the second main surface is in contact with the heating device.

[0086] According to the purification device described in the second aspect, the sample contained in the container can be efficiently heated by the heating device via the heat transfer plate.

[0087] (Item 3) The purification device further includes a support plate disposed around the first main surface of the container so as to overlap the first main surface. The sealing member is disposed in a gap between the first main surface and the support plate.

[0088] According to the purification device described in the third aspect, even if liquid leaks from the container during purification of the sample, the sealing member can prevent the liquid from entering the gap between the heat transfer plate and the support plate.

[0089] (Item 4) In the purification device, the sealing member has heat insulating properties. According to the purification device described in item 4, even if liquid leaks from the container during purification of the sample, the heat transfer to the support plate can be prevented by the sealing member having heat insulating properties.

[0090] (Item 5) In the purification apparatus, the heating device is a thermostatic stirrer. The purification apparatus further includes a stirrer that is provided inside the container and stirs the sample by magnetic force from the heating device. The heat transfer plate is a non-magnetic material.

[0091] According to the purification device described in the fifth aspect, the sample in the container can be stirred by rotating the stirrer in the container via the heat transfer plate using the heating device.

[0092] (Item 6) The purification device further includes a discharge port provided in the container for discharging waste liquid from the container.

[0093] According to the refining device described in item 6, even if the liquid discharged from the port leaks, the heat transfer plate can prevent the liquid from getting onto the heating device.

[0094] (Item 7) In the refining device, the container can be separated into a first member and a second member.

[0095] According to the refining device described in the seventh aspect, even if liquid leaks from the separable part of the container, the heat transfer plate can prevent the liquid from getting onto the heating device.

[0096] (Clause 8) The purification device further includes a first port for introducing into the container a decomposition liquid for treating impurities contained in the sample, a second port for introducing into the container a heavy liquid for separating the sample based on differences in specific gravity, a discharge section for discharging to the outside of the container a supernatant liquid produced by the introduction of the heavy liquid, and a control device for controlling the introduction of the decomposition liquid at the first port and the introduction of the heavy liquid at the second port.

[0097] According to the purification device described in paragraph 8, in a purification device in which a sample is automatically purified by a control device, even if liquid leaks from a container during purification of the sample, the heat transfer plate and sealing member can prevent the liquid from getting onto the heating device.

[0098] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the scope and meaning equivalent to the claims. [Explanation of symbols]

[0099] 1 Purification device, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 Piping, 31, 32, 33 Pump, 41, 42, 43 Solenoid valve, 50 Container, 51 First member, 52 Second member, 55 Discharge port, 61, 62, 63, 64 Port, 71 Stirrer, 72 Stirring bar, 80 Discharge pipe, 90 Support, 91 Heat transfer plate, 91A First main surface, 91B Second main surface, 92 Support plate, 92A, 310, 320, 330 Opening, 93 Sealing member, 100 Purifier, 110 Decomposition liquid reservoir, 120 Heavy liquid reservoir, 130 Rinse liquid reservoir, 140, 150 Waste liquid reservoir, 210 Detection filter, 215 supernatant liquid reservoir, 300 case, 500 control device, 501 calculation device, 502 memory, 503 communication device, 504 display device, 505 input device, 506 device, 507 recording medium, 510 storage, 511 control program, 512 control data.

Claims

1. A purification device for purifying a sample, comprising: A container for containing the sample; a heating device disposed below the container and configured to heat the sample contained in the container; a heat transfer plate disposed between the container and the heating device, the heat transfer plate having a first main surface thermally connected to the container and a second main surface thermally connected to the heating device and opposite to the first main surface; a sealing member disposed around the container on the first major surface; a support plate disposed around the first main surface of the container so as to overlap the first main surface; The sealing member has thermal insulation properties and is disposed in a gap between the first main surface and the support plate.

2. The purification apparatus of claim 1 , wherein the first major surface is in contact with the vessel and / or the second major surface is in contact with the heating device.

3. The heating device is a thermostatic stirrer, a stirrer provided inside the container for stirring the sample by a magnetic force from the heating device; The refining apparatus according to claim 1 , wherein the heat transfer plate is made of a non-magnetic material.

4. The purification apparatus according to claim 1 , further comprising a discharge port provided in the container for discharging waste liquid from the container.

5. The purification device according to claim 1 , wherein the vessel is separable into a first member and a second member.

6. a first port for introducing a decomposition solution for treating impurities contained in the sample into the container; a second port for introducing a heavy liquid into the container for separating the sample based on the specific gravity difference; a discharge part for discharging a supernatant liquid generated by the introduction of the heavy liquid to the outside of the container; 2. The purification apparatus of claim 1, further comprising a controller for controlling the introduction of the decomposition liquid at the first port and the introduction of the heavy liquid at the second port.

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