Harmful metal sampling device

Abstract

According to one aspect of the present, provided is a harmful metal sampling device comprising: a first pumping unit configured to provide a pumping force for transferring a sample in which a harmful metal component and an air component are mixed; a second pumping unit configured to provide a pumping force for transferring an absorption liquid for absorbing the harmful metal component; a gas-liquid separation unit configured such that the sample and the absorption liquid are introduced to separate the air component and the metal component absorption liquid in which the harmful metal component is absorbed; and a third pumping unit configured to provide a pumping force for transferring the harmful metal component absorption liquid from the gas-liquid separation unit to a collection storage unit.

Description

Hazardous metal sampling device

[0001] The present invention relates to a hazardous metal sampling device.

[0002] Hazardous metals are specific air and water quality pollutants that are legally controlled as very important pollutants not only in the air but also in drinking water, groundwater, industrial wastewater, and soil, and are widely used in various industrial fields.

[0003]

[0004] For example, in the case of arsenic, because it has particle and gaseous properties, there are limitations to capturing it with a filter and measuring it optically, and a method of dissolving it in an aqueous solution and analyzing it is being used.

[0005]

[0006] The existing method of dissolving in an aqueous solution involves dissolving the collected hazardous substances through wet chemical pretreatment after filtering with a filter, or dissolving the pollutants contained in the air by injecting an air sample into the aqueous solution using an impinger. However, this method has the limitation of requiring sampling for a very long time, and since only one location can be measured with one sampler, the efficiency may be reduced.

[0007]

[0008] Additionally, sampling devices that can improve worker handling issues and the risks associated with using chemicals at low concentrations are needed.

[0009] A hazardous metal sampling device according to an embodiment of the present invention is for automating hazardous metal sampling.

[0010] The subject matter of the present application is not limited to the subjects mentioned above, and other subjects not mentioned will be clearly understood by those skilled in the art from the description below.

[0011] According to one aspect of the present invention, a hazardous metal sampling device is provided, comprising: a first pumping unit configured to provide a pumping force for transporting a sample in which a hazardous metal component and an air component are mixed; a second pumping unit configured to provide a pumping force for transporting an absorbent liquid for absorbing the hazardous metal component; a gas-liquid separation unit configured to separate the air component and the metal component absorbent liquid into which the hazardous metal component has been absorbed by introducing the sample and the absorbent liquid; and a third pumping unit configured to provide a pumping force for transporting the hazardous metal component absorbent liquid from the gas-liquid separation unit to a storage unit for collection.

[0012] A hazardous metal sampling device according to one aspect of the present invention further includes a mixing path through which the absorbent liquid and the sample pass toward the gas-liquid separation unit, and the mixing path may have a coil shape to facilitate mixing of the absorbent liquid and the sample.

[0013] After the above-mentioned harmful metal component absorption liquid is collected in the collection storage, the second pumping unit switches from a flow path for transporting the absorption liquid to a flow path for introducing cleaning air under the control of the control unit, and the cleaning air reaches the third pumping unit through the gas-liquid separation unit under the flow path switching of the second pumping unit, and the third pumping unit can switch from a flow path for transporting the metal component absorption liquid to a flow path for transporting the cleaning air to a drain storage under the control of the control unit.

[0014] After the above-mentioned harmful metal component absorption liquid is collected in the above-mentioned collection storage, the third pumping unit can, under the control of the control unit, suck in external air or new air inside the collection storage unit through the flow path through which the harmful metal component absorption liquid is transferred and transfer it to the drain storage unit, thereby cleaning the collection flow path through which the harmful metal component absorption liquid is transferred.

[0015] After cleaning is performed on the flow path between the second pumping unit and the gas-liquid separation unit, the flow path between the gas-liquid separation unit and the third pumping unit, and the flow path between the third pumping unit and the collection storage unit, the second pumping unit and the third pumping unit transfer the absorption liquid to the collection flow path through which the harmful metal component absorption liquid is transferred under the control of the control unit, and then the third pumping unit transfers the absorption liquid in the collection flow path to the drain storage unit, thereby cleaning the collection flow path through which the harmful metal component absorption liquid is transferred.

[0016] The above second pumping unit can transport an absorption liquid having a volume equal to or smaller than the internal space of the above-mentioned extraction path.

[0017] A hazardous metal sampling device according to one aspect of the present invention further includes a sample port selection unit for selecting a sample port into which the sample is introduced under the control of the control unit, and a sampling port selection unit for selecting a sampling port for sampling the hazardous metal component absorbent under the control of the control unit, wherein the control unit can match and store the inflow port and the sampling port selected by the sample port selection unit.

[0018] According to another aspect of the present invention, a hazardous metal sampling device is provided, comprising: a first pumping unit configured to provide a pumping force for transporting a sample in which a hazardous metal component and a liquid component are mixed; a second pumping unit configured to provide a pumping force for transporting an absorbent liquid for absorbing the hazardous metal component; a chamber configured to introduce a mixture of the sample and the absorbent liquid; and a third pumping unit configured to provide a pumping force for transporting the mixture from the chamber to a storage unit for collection.

[0019] A hazardous metal sampling device according to another aspect of the present invention further includes a mixing channel through which the absorbent liquid and the sample pass toward the chamber, and the mixing channel may have a coil shape to facilitate mixing of the absorbent liquid and the sample.

[0020] After the mixed solution is collected in the collection storage, the second pumping unit switches from a channel for transporting the absorbent solution to a channel for introducing the cleaning solution under the control of the control unit, and the cleaning solution reaches the third pumping unit through the chamber under the channel switching of the second pumping unit, and the third pumping unit can switch from a collection channel for transporting the mixed solution to a drain channel for transporting the cleaning solution to a drain storage unit under the control of the control unit.

[0021] After the above-mentioned mixed solution is collected in the collection storage unit, the third pumping unit can clean the collection stream by sucking the cleaning solution through the collection channel through which the mixed solution is transferred and transferring it to the drain storage unit under the control of the control unit.

[0022] After cleaning is performed on the flow path between the second pumping unit and the chamber, the flow path between the chamber and the third pumping unit, and the sampling flow path between the third pumping unit and the sampling storage unit, the second pumping unit and the third pumping unit can transfer the absorption liquid to the sampling flow path to which the mixed liquid is transferred under the control of the control unit, and then the third pumping unit can transfer the absorption liquid in the sampling flow path to the drain storage unit, thereby cleaning the sampling flow path.

[0023] The above second pumping unit can transport an absorption liquid having a volume equal to or smaller than the internal space of the above-mentioned extraction path.

[0024] According to another aspect of the present invention, a hazardous metal sampling device further includes a sample port selection unit for selecting a sample port into which the sample is introduced under the control of a control unit, and a sampling port selection unit for selecting a sampling port for sampling the mixed solution under the control of the control unit, wherein the control unit can match and store the inlet port and the sampling port selected by the sample port selection unit.

[0025] A hazardous metal sampling device according to an embodiment of the present invention can provide a reduction in sampling time, an increase in sampling efficiency, and prevention of safety accidents through automation of hazardous metal sampling.

[0026] The effects of the present application are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0027] Figure 1 illustrates a sampling operation of a hazardous metal sampling device according to an embodiment of the present invention.

[0028] Figures 2 to 5 illustrate the cleaning operation of a hazardous metal sampling device according to an embodiment of the present invention.

[0029] Figure 6 illustrates a sampling operation of a hazardous metal sampling device according to another embodiment of the present invention.

[0030] Figures 7 to 10 illustrate the cleaning operation of a hazardous metal sampling device according to another embodiment of the present invention.

[0031] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. However, the attached drawings are provided solely to more easily disclose the contents of the present invention, and those skilled in the art will readily understand that the scope of the present invention is not limited to the scope of the attached drawings.

[0032] Additionally, the terminology used in this application is solely for the purpose of describing specific embodiments and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

[0033] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0034]

[0035] Fig. 1 illustrates a sampling operation of a hazardous metal sampling device according to an embodiment of the present invention. Figs. 2 to 4 illustrate a cleaning operation of a hazardous metal sampling device according to an embodiment of the present invention.

[0036]

[0037] As illustrated in FIGS. 1 to 4, a hazardous metal sampling device according to an embodiment of the present invention includes a first pumping unit (110), a second pumping unit (130), a gas-liquid separation unit (150), and a third pumping unit (170).

[0038]

[0039] The first pumping unit (110) is configured to provide pumping power for transporting a sample containing a mixture of hazardous metal components and air components. That is, the sample may contain air components and hazardous metal components.

[0040] The sample suction amount can be controlled by the flow control unit (190). The flow control unit (190) and the first pumping unit (110) can be provided in the same flow path.

[0041]

[0042] The second pumping unit (130) is configured to provide pumping power for transporting an absorbent solution for absorbing hazardous metal components. The absorbent solution may vary depending on the hazardous metal component to be sampled. For example, in the case of arsenic (As), the absorbent solution may be composed of 0.9% HNO3 + 5% H2O2, but the present invention is not limited to such hazardous metal components and absorbent solutions.

[0043] The second pumping unit (130) may include a port (P21) through which the absorbent liquid flows in, a port (P22) through which the cleaning air (to be described later) flows in, and a port (P23) through which the absorbent liquid and cleaning air flow out.

[0044] The port through which the absorbent liquid flows in may be connected to the absorbent liquid storage unit (210). The cleaning air may be air free of harmful metal components or an inert gas, but the present invention is not limited thereto. The port through which the absorbent liquid and cleaning air flow out may be connected to a flow path through which the sample is transported.

[0045]

[0046] The gas-liquid separation unit (150) is configured so that a sample and an absorbent are introduced, mixed and dissolved, and then separated into a solution in which metal components are dissolved and absorbed and an air component.

[0047] That is, the gas-liquid separation unit (150) is configured so that a sample and an absorbent liquid are introduced and an air component and a metal component absorbent liquid in which hazardous metal components are absorbed are separated. Since the sample and the absorbent liquid are introduced into the gas-liquid separation unit (150), the metal component absorbent liquid formed by the absorbent liquid absorbing the hazardous metal components and the air component in which the hazardous metal components are removed from the sample exist in the gas-liquid separation unit (150).

[0048] Since the metal component absorbent is heavier than the air component of the sample, it is located at the bottom of the gas-liquid separator (150), and the air component of the sample is located at the top of the gas-liquid separator (150).

[0049] The upper part of the gas-liquid separation unit (150) is connected to a passage equipped with the first pumping unit (110) described above, and air components can be discharged to the outside according to the operation of the first pumping unit (110). In order for the air components present at the upper part of the gas-liquid separation unit (150) to be smoothly discharged, the passage can be connected to the upper part of the gas-liquid separation unit (150).

[0050]

[0051] The third pumping unit (170) is configured to provide a pumping force to transfer the harmful metal component absorption liquid from the gas-liquid separation unit (150) to the collection storage unit (230). The third pumping unit (170) may include a port (P31) through which the metal component absorption liquid flows in and a port (P32) through which the metal component absorption liquid flows out.

[0052] The port (P31) through which the metal component absorbent liquid is introduced can be connected to the lower part of the gas-liquid separation unit (150). Since the metal component absorbent liquid is present at the lower part of the gas-liquid separation unit (150), the port (P31) of the third pumping unit (170) can be connected to the lower part of the gas-liquid separation unit (150).

[0053] The port (P32) through which the metal component absorbent flows out can be connected to the collection storage unit (230) through the collection path (250).

[0054] Cleaning air, which will be described later, can be introduced through port (P31) and discharged through port (P33). Port (P33) can be connected to a drain storage unit (270).

[0055]

[0056] The control unit (290) can control the valves, pumps, and flow control unit (190) required for the present invention and provide information necessary for the operation of the present invention. In addition, the control unit (290) can include a memory for storing data, logic, commands, and programs necessary for the operation of the present invention.

[0057]

[0058] The second pumping unit (130) and the third pumping unit (170) may include a piston pump such as a syringe pump and a valve unit (V2, V3) capable of changing the flow path, but the present invention is not limited to such types of pumps.

[0059] The valve units (V2, V3) may include rotary valves, but the present invention is not limited to such valve types. For example, instead of rotary valves, valves may be provided for each of ports P21, P22, and P23 of the second pumping unit (130). In addition, valves may be provided for each of ports P31, P32, and P33 of the third pumping unit (170).

[0060] When the second pumping unit (130) is a piston valve, the absorption liquid and cleaning air may be introduced through ports P21 and P22, respectively, as the piston moves backward, and the absorption liquid and cleaning air may be discharged through port P23 as the piston moves forward. The valve unit (V2) may be operated in conjunction with the piston movement of the second pumping unit (130), thereby opening and closing the ports P21, P22, and P23.

[0061] Likewise, when the third pumping unit (170) is a piston valve, the metal component absorption liquid and cleaning air may be introduced through port P31 as the piston moves backward, and the metal component absorption liquid and cleaning air may be discharged through port P32 and port P33, respectively, as the piston moves forward. The valve unit (V3) may be operated in conjunction with the piston movement of the third pumping unit (170) to open and close the ports P31, P32, and P33.

[0062] Accordingly, the euros shown in FIGS. 1 to 4 can be formed.

[0063] In typical hazardous metal sampling, most processes are performed manually by workers. In contrast, the present invention automates hazardous metal sampling, enabling safe and efficient hazardous metal sampling.

[0064]

[0065] Meanwhile, as illustrated in FIGS. 1 to 5, the hazardous metal sampling device according to an embodiment of the present invention may further include a mixing passage (310) through which the absorbent liquid and the sample pass toward the gas-liquid separation unit (150). At this time, the mixing passage (310) may have a coil shape to facilitate mixing of the absorbent liquid and the sample.

[0066] One end of the mixing flow path (310) is connected to the flow path through which the sample is introduced and the port (P23) of the second pumping unit (130), and the other end of the mixing flow path (310) can be connected to the gas-liquid separation unit (150). Accordingly, the hazardous metal components of the sample can be efficiently absorbed into the absorbent liquid and introduced into the gas-liquid separation unit (150).

[0067]

[0068] Meanwhile, as illustrated in FIGS. 1 to 5, the first pumping unit (110) can discharge the air component separated from the gas-liquid separation unit (150) to the outside. At this time, the flow rate control unit (190) can be provided in the flow path through which the separated air component flows, and can control the amount of sample suctioned.

[0069] One end of the flow path through which the separated air component flows may be connected to the upper end of the gas-liquid separation unit (150), and the other end of the flow path may be connected to the first pumping unit (110).

[0070] As previously described, the harmful metal components can be smoothly absorbed into the absorbent liquid by the mixed flow and introduced into the gas-liquid separation unit (150). Accordingly, the amount of the harmful metal components flowing out together with the air components from the gas-liquid separation unit (150) can be reduced.

[0071]

[0072] Meanwhile, as illustrated in FIG. 2, after the harmful metal component absorption liquid is collected in the collection storage unit (230), the second pumping unit (130) can be switched from a path for transporting the absorption liquid to a path for introducing cleaning air under the control of the control unit (290). The second pumping unit (130) can provide pumping power for introducing cleaning air. The cleaning air can be introduced through the port (P22) and discharged through the port (P23).

[0073] Accordingly, the cleaning air can reach the third pumping unit (170) through the gas-liquid separation unit (150) according to the flow path conversion of the second pumping unit (130). The third pumping unit (170) can be converted from a collection flow path (250) for transporting a metal component absorbent liquid to a drain flow path (330) for transporting the cleaning air to a drain storage unit according to the control of the control unit (290). One end of the drain flow path (330) can be connected to a port (P33) of the third pumping unit (170), and the other end of the drain flow path (330) can be connected to the drain storage unit (270).

[0074] Accordingly, the cleaning air can push the remaining absorbent and harmful metal absorbent in the euro into the drain storage compartment.

[0075] When the hazardous metal components of a sample are absorbed into an absorbent solution and collected in a collection storage unit (230), the absorbent solution or the metal component absorbent solution may remain in the flow path. The absorbent solution or the metal component absorbent solution remaining in the flow path may act as a contaminant during the process of collecting the hazardous metal components of the next sample, thereby adversely affecting the next sampling process.

[0076] Cleaning air can increase the reliability of the next sampling operation by cleaning the remaining absorbent liquid or hazardous metal absorbent liquid in the gas-liquid separation unit (150) or the flow path.

[0077]

[0078] Meanwhile, as illustrated in FIG. 3, after the harmful metal component absorption liquid is collected in the collection storage unit (230), the third pumping unit (170) can clean the collection stream (250) through which the harmful metal component absorption liquid is transferred by sucking in external air or new air inside the collection storage unit (230) through the flow path through which the harmful metal component absorption liquid is transferred under the control of the control unit (290) and transferring it to the drain storage unit.

[0079] In FIG. 1, after the harmful metal absorbent liquid is collected in the collection storage (230), the worker can separate the collection storage (230) from the collection path (250) and transfer it to the analysis device. Accordingly, the collection path (250) can be connected to a new collection storage (230) or exposed to the atmosphere without being connected to a new collection storage (230).

[0080] The valve unit (V3) of the third pumping unit (170) can connect the port (P32) and the port (P33) under the control of the control unit (290). The third pumping unit (170) can introduce the metal component absorption liquid remaining in the collection channel (250) in the reverse direction of the direction in which the metal component absorption liquid flows in the collection channel (250) in FIG. 1 and then drain the metal component absorption liquid into the drain storage unit through the drain channel (330).

[0081] For example, when the third pumping unit (170) includes a piston pump, the metal component absorption liquid left in the collection path (250) through the port (P320) as the piston retreats can flow into the third pumping unit (170), and then the metal component absorption liquid introduced as the piston advances can flow out to the drain storage unit through the port (P33) and the drain path (330).

[0082] In this way, by removing the metal component absorbent remaining in the extraction path (250), cleaning of the extraction path (250) can be performed automatically rather than manually.

[0083]

[0084] The cleaning operation of FIG. 3 may be performed after the cleaning operation of FIG. 2 is performed, or the cleaning operation of FIG. 2 may be performed after the cleaning operation of FIG. 3 is performed.

[0085]

[0086] As previously described through FIGS. 2 and 3, cleaning can be performed on the flow path between the second pumping unit (130) and the gas-liquid separation unit (150), the flow path between the gas-liquid separation unit (150) and the third pumping unit (170), and the flow path between the third pumping unit (170) and the collection storage unit (230).

[0087] Thereafter, as shown in FIG. 4, the second pumping unit (130) and the third pumping unit (170) can transport the absorption liquid to the collection path (250) where the harmful metal component absorption liquid is transported under the control of the control unit (290).

[0088] To this end, the second pumping unit (130) can operate the piston according to the control of the control unit (290) to introduce the absorption liquid through the port (P21) and discharge the absorption liquid through the port (P23).

[0089] In addition, the third pumping unit (170) can operate the piston according to the control of the control unit (290) to introduce the absorption liquid through the port (P31) and open it through the port (P32).

[0090] Thereafter, the third pumping unit (170) can clean the sampling unit (250) to which the harmful metal component absorption liquid has been transferred by transferring the absorption liquid from the sampling unit (250) to the drain storage unit. To this end, the third pumping unit (170) can operate the piston under the control of the control unit (290) to introduce the absorption liquid through the port (P32) and discharge the absorption liquid through the port (P33).

[0091] Accordingly, contaminants present on the inner surface of the flow path can be removed. That is, even if cleaning is performed using cleaning air and cleaning the sampling flow path (250) in FIGS. 2 and 3, contaminants may remain on the inner surface of the flow path through which the fluid moves. The present invention can remove contaminants remaining on the inner surface of the flow path using an absorbent capable of absorbing harmful metal components.

[0092]

[0093] Meanwhile, the second pumping unit (130) can transport an absorbent liquid having a volume equal to or smaller than the internal space of the collection channel (250). As previously described with reference to FIG. 4, the absorbent liquid can flow to remove contaminants on the inner surface of the channel.

[0094] Unlike the present invention, if the volume of the absorbent liquid is larger than the volume of the internal space of the collection channel (250), at least a portion of the absorbent liquid may be discharged outside the collection channel (250). This may result in unnecessary loss of the absorbent liquid.

[0095] The present invention can prevent unnecessary loss of the absorbent liquid by introducing an absorbent liquid having a volume equal to or smaller than the volume corresponding to the internal space of the extraction path (250).

[0096] At this time, the movement of the absorbent liquid to the end of the collection channel (250) can be controlled according to the operation of the third pumping unit (170). For example, as illustrated in FIG. 4, an absorbent liquid having a volume smaller than the internal space of the collection channel (250) can be introduced, and the absorbent liquid can be transported to the end of the collection channel (250) according to the operation of the third pumping unit (170). Accordingly, cleaning of the collection channel (250) can be performed more completely.

[0097]

[0098] As illustrated in FIG. 5, the hazardous metal sampling device according to an embodiment of the present invention may further include a sample port selection unit (350) and a sampling port selection unit (370).

[0099] The sample port selection unit (350) may be configured to select a sample port into which a sample is introduced under the control of the control unit (290). The sample port selection unit (350) may include a sample valve (351) provided in each sample port. In addition, the sample port selection unit (350) may further include a manifold (353) connected to a plurality of sample ports. The control unit (290) may select a sample port by opening one of the plurality of sample valves (351) and closing the rest.

[0100] The sampling port selection unit (370) may be configured to select a sampling port for sampling a harmful metal component absorption liquid under the control of the control unit (290). The sampling port selection unit (370) includes a plurality of sampling valves (371), and the sampling valves (371) may be provided in a sampling port connected to a sampling path (250). In addition, the sampling port may be connected to a sampling storage unit (230).

[0101] The control unit (290) can match and store the sample port and the sampling port selected by the sample port selection unit (350). The types of hazardous metals detected by the present invention may vary, and the time taken to detect the hazardous metals may also vary.

[0102] The present invention comprises multiple sample ports, allowing the sample ports to vary depending on the type of hazardous metal. Accordingly, the sampling port matching the selected sample port may also vary. This matching information may be stored in the memory of the control unit (290). Furthermore, the selected sample port and sampling port may also be matched and stored in the memory based on the detection time.

[0103]

[0104] Next, a hazardous metal sampling device according to another embodiment of the present invention will be described.

[0105]

[0106] Fig. 6 illustrates a sampling operation of a hazardous metal sampling device according to another embodiment of the present invention. Figs. 7 to 10 illustrate a cleaning operation of a hazardous metal sampling device according to another embodiment of the present invention.

[0107]

[0108] As illustrated in FIGS. 6 to 9, a hazardous metal sampling device according to an embodiment of the present invention includes a first pumping unit (110), a second pumping unit (130), a chamber (150), and a third pumping unit (170).

[0109]

[0110] The first pumping unit (110) is configured to provide pumping power for transporting a sample containing a mixture of hazardous metal components and liquid components. Specifically, the sample may contain both liquid components and hazardous metal components. The liquid components may be, but are not limited to, tap water, purified water, treated wastewater, or cleaning water used in semiconductor processes. The hazardous metal components may be heavy metals, but the present invention is not limited thereto.

[0111] The sample suction amount can be controlled by the flow control unit (190). The flow control unit (190) and the first pumping unit (110) can be provided in the same flow path.

[0112]

[0113] The second pumping unit (130) is configured to provide pumping power for transporting an absorbent solution for absorbing hazardous metal components. The absorbent solution may vary depending on the hazardous metal component to be sampled. For example, in the case of arsenic (As), the absorbent solution may be composed of 0.9% HNO3 + 5% H2O2, but the present invention is not limited to such hazardous metal components and absorbent solutions.

[0114] The second pumping unit (130) may include a port (P21) through which the absorbent liquid flows in, a port (P22) through which the cleaning liquid to be described later flows in, and a port (P23) through which the absorbent liquid and the cleaning liquid flow out.

[0115] The port (P21) through which the absorbent liquid is introduced may be connected to the absorbent liquid storage unit (210). The cleaning liquid may include at least one of ultrapure water, hydrofluoric acid (HF), nitric acid (HNO3), and hydrogen peroxide (H2O2), but the present invention is not limited thereto. The cleaning liquid may be formed by combining the above substances depending on the degree of contamination, and the concentration of the cleaning liquid may also be adjusted.

[0116] The ports through which the absorbent and cleaning liquid are discharged can be connected to the flow path through which the sample is transported.

[0117]

[0118] The chamber (150) is filled with a mixture of a sample and an absorbent so that harmful metal components can be dissolved and absorbed into the absorbent.

[0119] That is, the chamber (150) can be configured so that a mixture of a sample and an absorbent can be introduced.

[0120] The chamber (150) is connected to a flow path equipped with the first pumping unit (110) described above, and a portion of the mixed liquid in the chamber (150) can be discharged to the outside according to the operation of the first pumping unit (110). That is, a portion of the mixed liquid in the chamber (150) can be introduced into the collection storage unit (230) described later, and the remaining mixed liquid can be discharged to the outside.

[0121]

[0122] The third pumping unit (170) is configured to provide a pumping force to transfer the mixed solution from the chamber (150) to the collection storage unit (230). The third pumping unit (170) may include a port (P31) through which the mixed solution flows in and a port (P32) through which the mixed solution flows out.

[0123] The port (P31) through which the mixed liquid flows in can be connected to the chamber (150). The port (P32) through which the mixed liquid flows out can be connected to the collection storage unit (230) through the collection path (250).

[0124] The cleaning liquid to be described later can be introduced through port (P31) and discharged through port (P33). Port (P33) can be connected to a drain storage unit (270).

[0125]

[0126] The control unit (290) can control the valves, pumps, and flow control unit (190) required for the present invention and provide information necessary for the operation of the present invention. In addition, the control unit (290) can include a memory for storing data, logic, commands, and programs necessary for the operation of the present invention.

[0127]

[0128] The second pumping unit (130) and the third pumping unit (170) may include a piston pump such as a syringe pump and a valve unit (V2, V3) capable of changing the flow path, but the present invention is not limited to such types of pumps.

[0129] The valve units (V2, V3) may include rotary valves, but the present invention is not limited to such valve types. For example, instead of rotary valves, valves may be provided for each of ports P21, P22, and P23 of the second pumping unit (130). In addition, valves may be provided for each of ports P31, P32, and P33 of the third pumping unit (170).

[0130] When the second pumping unit (130) is a rotary valve, the rotary valve can be operated so that the absorbent liquid flows in through port P21 and the cleaning liquid flows in through port P22 as the piston moves backward.

[0131] Additionally, the absorbent liquid or cleaning liquid may flow out through port P23 as the piston advances. The valve unit (V2) may operate in conjunction with the piston movement of the second pumping unit (130) to open and close ports P21, P22, and P23.

[0132] Likewise, when the third pumping unit (170) is a rotary valve, the mixed liquid or cleaning liquid may be introduced through port P31 as the piston moves backward, and the mixed liquid may be discharged through port P32 or the cleaning liquid may be discharged through port P33 as the piston moves forward. The valve unit (V3) may be operated in conjunction with the piston movement of the third pumping unit (170) to open and close the ports P31, P32, and P33.

[0133] Accordingly, the euros shown in FIGS. 6 to 9 can be formed.

[0134] In typical hazardous metal sampling, most processes are performed manually by workers. In contrast, the present invention automates hazardous metal sampling, enabling safe and efficient hazardous metal sampling.

[0135] For example, the present invention can analyze in real time the harmful metal components contained in tap water, water that has undergone wastewater treatment, drinking water obtained or produced from a water purification plant, or water used in a semiconductor processing process.

[0136]

[0137] Meanwhile, as illustrated in FIGS. 6 to 10, the hazardous metal sampling device according to an embodiment of the present invention may further include a mixing passage (310) through which the absorbent liquid and the sample pass toward the chamber (150). At this time, the mixing passage (310) may have a coil shape to facilitate mixing of the absorbent liquid and the sample.

[0138] One end of the mixing flow path (310) is connected to the flow path through which the sample is introduced and the port (P23) of the second pumping unit (130), and the other end of the mixing flow path (310) can be connected to the chamber (150). Accordingly, mixing of the absorbent and the sample is smoothly performed, so that the hazardous metal components of the sample can be efficiently absorbed into the absorbent and introduced into the chamber (150).

[0139]

[0140] Meanwhile, as illustrated in FIGS. 6 to 10, the first pumping unit (110) can discharge a portion of the mixed solution from the chamber (150) to the outside. At this time, a flow control unit (190) can be provided in the path through which a portion of the mixed solution is discharged, and can control the amount of sample suctioned.

[0141] One end of the flow path through which a portion of the above mixture is discharged may be connected to a chamber (150), and the other end of the flow path may be connected to a first pumping unit (110).

[0142]

[0143] Meanwhile, as illustrated in FIG. 7, after the mixed liquid is collected in the collection storage unit (230), the second pumping unit (130) can be switched from a path for transporting the absorbent liquid to a path for introducing the cleaning liquid under the control of the control unit (290).

[0144] The second pumping unit (130) can provide pumping power for introducing cleaning liquid. The cleaning liquid can be introduced through port (P22) and discharged through port (P23).

[0145] Accordingly, the cleaning liquid can reach the third pumping unit (170) through the chamber (150) by changing the flow path of the second pumping unit (130).

[0146] The third pumping unit (170) can be switched from a collection channel (250) for transporting a mixed solution to a drain channel (330) for transporting a cleaning solution to a drain storage unit (270) under the control of the control unit (290). One end of the drain channel (330) can be connected to a port (P33) of the third pumping unit (170), and the other end of the drain channel (330) can be connected to the drain storage unit (270).

[0147] Accordingly, the cleaning liquid can push the remaining absorbent liquid, sample and mixed liquid in the euro into the drain storage unit (270).

[0148] When the hazardous metal components of the sample are absorbed into the absorbent liquid and collected in the collection storage unit (230), the absorbent liquid, sample, and mixed liquid may remain in the flow path. The absorbent liquid, sample, and mixed liquid remaining in the flow path may act as contaminants during the process of collecting the hazardous metal components of the next sample, thereby adversely affecting the next sampling process.

[0149] The cleaning solution can increase the reliability of the next sampling operation by cleaning the absorbent, sample, and mixed solution remaining in the chamber (150) or the euro.

[0150]

[0151] Meanwhile, as illustrated in FIG. 8, after the mixed solution is collected in the collection storage unit (230), the third pumping unit (170) can clean the collection stream (250) through which the mixed solution is transferred by sucking the cleaning solution through the collection stream (250) under the control of the control unit (290) and transferring it to the drain storage unit (270).

[0152] In FIG. 6, after the mixed solution is collected in the collection storage unit (230), the worker separates the collection storage unit (230) from the collection path (250) and transfers it to an analysis device (not shown), or the analysis device may be connected to the collection storage unit (230) via a path.

[0153] The analysis device may be an inductively coupled plasma mass spectrometer, but the present invention is not limited thereto.

[0154] The valve unit (V3) of the third pumping unit (170) can connect the port (P32) and the port (P33) under the control of the control unit (290). The third pumping unit (170) can introduce the mixed liquid remaining in the sampling channel (250) in the reverse direction of the direction in which the mixed liquid flows in the sampling channel (250) in FIG. 6 and then drain the mixed liquid into the drain storage unit (270) through the drain channel (330).

[0155] For example, when the third pumping unit (170) includes a piston pump, the mixed liquid left in the collection path (250) through the port (P32) as the piston retreats may flow into the third pumping unit (170) together with the cleaning liquid, and then, as the piston advances, the mixed liquid and the cleaning liquid may flow out to the drain storage unit (270) through the port (P33) and the drain path (330).

[0156] By removing the mixed liquid remaining in the extraction path (250) in this way, cleaning of the extraction path (250) can be performed automatically rather than manually.

[0157]

[0158] At this time, the cleaning operation of FIG. 8 may be performed after the cleaning operation of FIG. 7 is performed, or the cleaning operation of FIG. 7 may be performed after the cleaning operation of FIG. 8 is performed.

[0159]

[0160] As previously described through FIGS. 7 and 8, cleaning can be performed on the flow path between the second pumping unit (130) and the chamber (150), the flow path between the chamber (150) and the third pumping unit (170), and the collection flow path (250) between the third pumping unit (170) and the collection storage unit (230).

[0161]

[0162] Thereafter, as shown in FIG. 9, the second pumping unit (130) and the third pumping unit (170) can transport the absorption liquid to the collection path (250) where the harmful metal component absorption liquid is transported under the control of the control unit (290).

[0163] To this end, the second pumping unit (130) can operate the piston according to the control of the control unit (290) to introduce the absorption liquid through the port (P21) and discharge the absorption liquid through the port (P23).

[0164] In addition, the third pumping unit (170) can operate the piston under the control of the control unit (290) to introduce the absorption liquid through the port (P31) and discharge it through the port (P32). At this time, the piston can move to the extent that at least a portion of the discharged absorption liquid remains in the collection path (250).

[0165] Thereafter, the third pumping unit (170) can clean the sampling unit (250) to which the mixed liquid has been transferred by transferring the absorption liquid from the sampling unit (250) to the drain storage unit (270). To this end, the third pumping unit (170) can operate the piston under the control of the control unit (290) to introduce the absorption liquid remaining in the sampling unit (250) through the port (P32) and discharge the absorption liquid through the port (P33).

[0166] Accordingly, contaminants present on the inner surface of the flow path can be removed. That is, even if cleaning using a cleaning solution and cleaning the sampling flow path (250) are performed in FIGS. 7 and 8, contaminants may remain on the inner surface of the flow path through which the fluid moves. The present invention can remove contaminants remaining on the inner surface of the flow path using an absorbent capable of absorbing harmful metal components.

[0167]

[0168] Meanwhile, the second pumping unit (130) can transport an absorbent liquid having a volume equal to or smaller than the internal space of the collection channel (250). As previously described with reference to FIG. 9, the absorbent liquid can flow to remove contaminants on the inner surface of the channel.

[0169] Unlike the present invention, if the volume of the absorbent liquid is larger than the volume of the internal space of the collection channel (250), at least a portion of the absorbent liquid may be discharged outside the collection channel (250). This may result in unnecessary loss of the absorbent liquid.

[0170] The present invention can prevent unnecessary loss of the absorbent liquid by introducing an absorbent liquid having a volume equal to or smaller than the volume corresponding to the internal space of the extraction path (250).

[0171] At this time, the movement of the absorbent liquid to the end of the collection channel (250) can be controlled according to the operation of the third pumping unit (170). For example, as illustrated in FIG. 9, an absorbent liquid having a volume smaller than the internal space of the collection channel (250) can be introduced, and the absorbent liquid can be transported to the end of the collection channel (250) according to the operation of the third pumping unit (170). Accordingly, cleaning of the collection channel (250) can be performed more completely.

[0172]

[0173] As illustrated in FIG. 10, the hazardous metal sampling device according to an embodiment of the present invention may further include a sample port selection unit (350) and a sampling port selection unit (370).

[0174] The sample port selection unit (350) may be configured to select a sample port into which a sample is introduced under the control of the control unit (290). The sample port selection unit (350) may include a sample valve (351) provided in each sample port. In addition, the sample port selection unit (350) may further include a manifold (353) connected to a plurality of sample ports. The control unit (290) may select a sample port by opening one of the plurality of sample valves (351) and closing the rest.

[0175] The sampling port selection unit (370) may be configured to select a sampling port from which to sample the mixed solution under the control of the control unit (290). The sampling port selection unit (370) includes a plurality of sampling valves (371), and the sampling valves (371) may be provided in a sampling port connected to a sampling path (250). In addition, the sampling port may be connected to a sampling storage unit (230).

[0176] The control unit (290) can match and store the sample port and the sampling port selected by the sample port selection unit (350). The types of hazardous metals detected by the present invention may vary, and the time taken to detect the hazardous metals may also vary.

[0177] The present invention comprises multiple sample ports, allowing the sample ports to vary depending on the type of hazardous metal. Accordingly, the sampling port matching the selected sample port may also vary. This matching information may be stored in the memory of the control unit (290). Furthermore, the selected sample port and sampling port may also be matched and stored in the memory based on the detection time.

[0178]

[0179] As described above, embodiments of the present invention have been described. It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope thereof, in addition to the embodiments described above. Therefore, the above-described embodiments should be considered illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description, but may be modified within the scope of the appended claims and their equivalents.

Claims

1. A first pumping unit configured to provide pumping power for transporting a sample containing a mixture of hazardous metal components and air components; A second pumping unit configured to provide pumping power for transporting an absorption liquid for absorbing the above harmful metal components; A gas-liquid separation unit configured to separate the air component and the metal component absorption liquid into which the sample and the absorption liquid are introduced and the harmful metal component is absorbed; and A hazardous metal sampling device including a third pumping unit configured to provide a pumping force to transfer the hazardous metal component absorption liquid from the above-mentioned gas-liquid separation unit to a storage unit for collection.

2. In paragraph 1, Further comprising a mixing path through which the absorbent and the sample pass toward the gas-liquid separation unit; A hazardous metal sampling device characterized in that the mixing path has a coil shape to facilitate mixing of the absorbent liquid and the sample.

3. In paragraph 1, After the above harmful metal component absorption liquid is collected in the above collection storage unit, The above second pumping unit switches from a path for transporting the absorbent liquid to a path for introducing cleaning air under the control of the control unit, The above cleaning air passes through the gas-liquid separation unit according to the flow path switching of the second pumping unit and reaches the third pumping unit. A hazardous metal sampling device characterized in that the third pumping unit switches from a sampling path for transporting the metal component absorption liquid to a path for transporting the cleaning air to a drain storage unit under the control of the control unit.

4. In paragraph 1, After the above harmful metal component absorption liquid is collected in the above collection storage unit, A hazardous metal sampling device characterized in that the third pumping unit, under the control of the control unit, sucks in external air or air inside a new sampling storage unit through the path through which the hazardous metal component absorption liquid is transferred and transfers it to the drain storage unit, thereby cleaning the sampling path through which the hazardous metal component absorption liquid is transferred.

5. In paragraph 1, After cleaning is performed on the flow path between the second pumping unit and the gas-liquid separation unit, the flow path between the gas-liquid separation unit and the third pumping unit, and the flow path between the third pumping unit and the collection storage unit, The second pumping unit and the third pumping unit, under the control of the control unit, transport the absorption liquid to the extraction path where the harmful metal component absorption liquid is transported. A hazardous metal sampling device characterized in that the third pumping unit transports the absorption liquid of the sampling path to a drain storage unit, thereby cleaning the sampling path through which the hazardous metal component absorption liquid is transported.

6. In paragraph 5, A hazardous metal sampling device, characterized in that the second pumping unit transports an absorbent liquid having a volume equal to or smaller than the internal space of the sampling passage.

7. In paragraph 1 or 2, A sample port selection unit for selecting a sample port into which the sample is introduced according to the control of the above control unit; Further comprising a sampling port selection unit for selecting a sampling port for sampling the harmful metal component absorption liquid according to the control of the above control unit, A hazardous metal sampling device characterized in that the control unit matches and stores the inlet port and the sampling port selected by the sample port selection unit.

8. A first pumping unit configured to provide pumping power for transporting a sample containing a mixture of hazardous metal components and liquid components; A second pumping unit configured to provide pumping power for transporting an absorption liquid for absorbing the above harmful metal components; A chamber configured to allow a mixture of the sample and the absorbent to flow into it; and A hazardous metal sampling device comprising a third pumping unit configured to provide a pumping force to transfer the mixture from the chamber to a storage unit for sampling.

9. In paragraph 8, further comprising a mixing path through which the absorbent and the sample pass toward the chamber; A hazardous metal sampling device characterized in that the mixing path has a coil shape to facilitate mixing of the absorbent liquid and the sample.

10. In paragraph 8, After the above mixture is collected into the above collection storage unit, The above second pumping unit switches from a path for transporting the absorbent liquid to a path for introducing the cleaning liquid under the control of the control unit. The above cleaning liquid passes through the chamber according to the flow path change of the second pumping unit and reaches the third pumping unit, A hazardous metal sampling device characterized in that the third pumping unit switches from a sampling path for transporting the mixed solution to a drain path for transporting the cleaning solution to a drain storage unit under the control of the control unit.

11. In paragraph 8, After the above mixture is collected into the above collection storage unit, A hazardous metal sampling device characterized in that the third pumping unit sucks the cleaning liquid through the sampling path through which the mixed liquid is transferred under the control of the control unit and transfers the cleaning liquid to a drain storage unit to clean the sampling path.

12. In paragraph 8, After cleaning is performed on the flow path between the second pumping unit and the chamber, the flow path between the chamber and the third pumping unit, and the sampling flow path between the third pumping unit and the sampling storage unit, The second pumping unit and the third pumping unit, under the control of the control unit, transfer the absorption liquid to the collection path where the mixed liquid is transferred, A hazardous metal sampling device characterized in that the third pumping unit transports the absorption liquid of the sampling path to a drain storage unit to clean the sampling path.

13. In paragraph 8, A hazardous metal sampling device, characterized in that the second pumping unit transports an absorbent liquid having a volume equal to or smaller than the internal space of the sampling passage.

14. In paragraph 8 or 9, A sample port selection unit for selecting a sample port into which the sample is introduced under the control of the control unit; Further comprising a sampling port selection unit for selecting a sampling port to sample the mixed solution according to the control of the above control unit, A hazardous metal sampling device characterized in that the control unit matches and stores the inlet port and the sampling port selected by the sample port selection unit.

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