On-site enrichment device and method for trace organic pollutants in water

Abstract

The invention discloses an on-site enrichment device and method for trace organic pollutants in water, the on-site enrichment device for trace organic pollutants in water comprises a water collecting assembly, a water collecting assembly and a water collecting assembly, the water collecting assembly comprises a water collector, and the water collector is internally provided with a containing cavity; a containing cavity in the water collector is communicated with an external water conveying assembly, and the water collector can receive an original water sample needing to be sampled; the conveying assembly comprises a pump machine and can be used for extracting a water sample from the original water sample collected in the water collector; the adsorption pipe is connected with a pump machine of the conveying assembly and can be used for collecting pollutants of the water sample conveyed by the conveying assembly. The on-site water sample enrichment device has the beneficial effects that the on-site enrichment of a water sample is realized through the enrichment device, so that the pressure of sampling personnel for carrying samples can be greatly reduced, and meanwhile, the time of a pretreatment link after the sampling personnel return to a laboratory is also reduced. Meanwhile, samples enriched on site have better stability, more accurate monitoring data can be provided, and a more reliable theoretical basis is provided for environment management.

Description

Technical Field

[0001] The invention relates to the technical field of ecological environment water quality monitoring, and in particular to an on-site enrichment device and method for trace organic pollutants in water. Background Art

[0002] With the acceleration of industrialization, water pollution is becoming increasingly serious, especially the emergence of new pollutants, which puts higher requirements on water quality monitoring. These new pollutants are usually low in concentration, highly toxic, and difficult to degrade, posing a potential threat to aquatic ecosystems and human health. In order to accurately assess the status of water pollution, it is necessary to enrich new pollutants in water samples to improve the sensitivity of analytical detection.

[0003] However, most of the existing technologies for enriching new pollutants in water bodies adopt the method of collecting water samples and bringing them back to the laboratory for enrichment operations. This method has obvious technical problems: during the sampling and transportation process, the ferrous ions in the water samples are prone to redox reactions with oxygen in the air and are quickly oxidized to form trivalent ferrous ions. Trivalent ferrous ions are prone to form floccules in water. These floccules have strong adsorption capacity and can absorb suspended matter, organic matter and some new pollutants in water samples, causing the new pollutants in water samples to degrade during transportation.

[0004] Due to redox reactions and the adsorption of flocculants, the concentration of new pollutants in water samples changes during transportation, resulting in inaccurate monitoring data after laboratory enrichment, which cannot truly reflect the actual concentration of new pollutants in the water body. This not only affects the accuracy of water quality monitoring, but also hinders the effective control of water pollution. Summary of the invention

[0005] In view of one of the deficiencies of the prior art, the present invention provides an on-site enrichment device and method for trace organic pollutants in water, which solves the problem of collecting pollutants in water samples.

[0006] To achieve the above object, the present invention provides the following technical solution: an on-site enrichment device for trace organic pollutants in water, comprising:

[0007] The water collection component includes a water collector, and the water collector has a receiving cavity inside; the receiving cavity inside the water collector is connected with the external water delivery component, and the water collector can receive the original water sample to be sampled;

[0008] A delivery component, including a pump, the pump and the water collection component are connected through a pipeline, and can extract water samples from the original water sample collected in the water collector;

[0009] The adsorption tube is connected to the pump of the delivery component and can collect pollutants from the water sample delivered by the delivery component.

[0010] Preferably, it also includes:

[0011] The housing has a driving structure for the pump disposed inside the housing, and a human-machine interaction component is disposed on the housing; and the water collector of the water collection component is disposed outside the housing.

[0012] Preferably, the housing further comprises:

[0013] The first connecting component is arranged on the outside of the shell, and the water collector is connected to the shell through the first connecting component.

[0014] Preferably, the water collector is a bottle body, the first connecting component is a hoop body, and the water collector is sleeved inside the first connecting component.

[0015] Preferably, the water collection component further comprises:

[0016] An overflow pipe, the inlet end of which is connected to the inner top of the water collector;

[0017] A sampling tube, the inlet end of which is in communication with the interior of the water collector, and the outlet end of which is in communication with the conveying assembly;

[0018] The water inlet pipe has an inlet end connected to an external water delivery component, and an outlet end connected to the interior of the water collector.

[0019] Preferably, a sampling hole is provided on the wall of the water collector corresponding to the inlet end of the sampling tube; a water inlet hole is provided on the wall of the water collector corresponding to the outlet end of the water inlet pipe;

[0020] The sampling hole is located above the water inlet hole.

[0021] Preferably, the water collection component further comprises:

[0022] The water inlet three-way valve has one end connected to the external water delivery component as the water inlet end; one end connected to the water inlet pipe as the water outlet end; and the other end as the drainage end.

[0023] Preferably, the pump is a peristaltic pump, and the sampling tube passes through the housing and is connected to the liquid inlet end of the pump;

[0024] The conveying assembly also includes:

[0025] The sample delivery pipeline has one end connected to the liquid outlet of the pump and the other end connected to the adsorption tube.

[0026] Preferably, the conveying assembly further comprises:

[0027] The delivery three-way valve is a three-way switch valve, and the delivery three-way valve is arranged on the sample delivery pipeline.

[0028] Preferably, the housing further comprises:

[0029] The second connecting component is arranged on the outer wall of the shell, and the second connecting component can be hung with the adsorption tube; the second connecting component includes:

[0030] A slide rail, fixedly arranged on the outer wall of the shell;

[0031] A hanger, slidably connected to the slide rail, and provided with a plurality of hanging positions for hanging adsorption tubes;

[0032] The outlet end of the sample delivery pipeline is arranged toward the adsorption tube on the rack; a sample delivery connector is arranged at one end of the sample delivery pipeline toward the rack, and the sample delivery connector can be plugged into the adsorption tube;

[0033] The second connection component also includes:

[0034] The baffle is arranged on the outer side of the shell, extends toward the adsorption tube, and is located below the adsorption tube connected to the sample delivery pipeline.

[0035] A method for on-site enrichment of trace organic pollutants in water, using the above-mentioned on-site enrichment device for trace organic pollutants in water, comprises the following steps:

[0036] S1. Setting up the device in the water area where sampling is required, including the placement of the aforementioned enrichment device and the setting of the external water delivery component; the external water delivery component can be used to pump water from the water area, such as a water pump;

[0037] S2, connect the pipeline, connect the water pipe of the external water delivery assembly and the water inlet three-way valve 15 of the device;

[0038] S3, adjusting the water inlet three-way valve 15 so that the water inlet end and the water discharge end of the water inlet three-way valve 15 are connected;

[0039] S4, open the external water delivery assembly, pump water into the water inlet three-way valve 15, and discharge it directly through the drainage end;

[0040] S5. Adjust the switch of the water inlet three-way valve 15 to allow water to enter the water collector 11 through the water inlet pipe 14 at an appropriate flow rate. The air inside the water collector 11 is discharged through the overflow pipe 12 until the overflow pipe 12 starts to discharge water samples, which proves that the water inside the water collector 11 is full.

[0041] S6, start the pump 21 through the human-machine interaction component 41, so that the sampling tube 13 extracts water samples from the water collector 11, and transports the water samples to the adsorption tube 3 through the sample delivery pipeline 22;

[0042] S7. Select an appropriate sampling time according to the actual situation. When the sampling time is met, seal the adsorption tube 3 after sampling, turn off the equipment, and complete the sampling.

[0043] Compared with the prior art, the device has the following beneficial effects: the device can extract samples at the sampling site, and at the same time pass the quantitative samples through the adsorption tube, so that the organic pollutants in the samples are enriched in the adsorption tube.

[0044] The on-site enrichment of water samples achieved through this enrichment device can not only greatly reduce the pressure on samplers to carry samples, but also reduce the time for pre-processing after returning to the laboratory. More importantly, the on-site enriched samples have better stability, can provide more accurate monitoring data, and provide a more reliable theoretical basis for environmental management. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The overall structure of the embodiment of the present application is shown in FIG. Figure 1 ;

[0046] Figure 2 The overall structure of the embodiment of the present application is shown in FIG. Figure 2 ;

[0047] Figure 3 The overall structure of the embodiment of the present application is shown in FIG. Figure 3 ;

[0048] Figure 4 for Figure 3 A partial enlarged view of;

[0049] Figure 5 This is a front view of an embodiment of the present application;

[0050] Figure 6 This is a right view of an embodiment of the present application.

[0051] In the figure:

[0052] 1. Water collecting assembly; 11. Water collecting vessel; 12. Overflow pipe; 13. Sampling tube; 14. Water inlet pipe; 15. Water inlet three-way valve; 12. Overflow pipe; 2. Delivery assembly; 21. Pump; 22. Sample delivery pipeline; 23. Delivery three-way valve; 3. Adsorption tube; 4. Shell; 41. Human-computer interaction assembly; 42. First connection assembly; 43. Second connection assembly; 44. Baffle. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] See also Figure 1-Figure 6 , this application provides the following technical solutions:

[0055] A device for on-site enrichment of trace organic pollutants in water comprises a water collection component 1, a conveying component 2 and an adsorption tube 3. The water collection component 1 comprises a water collector 11, and a receiving cavity is provided inside the water collector 11; the receiving cavity inside the water collector 11 is connected to an external water conveying component, and the water collector 11 can receive the original water sample conveyed by the external water conveying component. The conveying component 2 comprises a pump 21, and the pump 21 is a peristaltic pump. The pump 21 and the water collection component 1 are connected through a pipeline, and water samples can be extracted from the original water samples collected in the water collector 11. The adsorption tube 3 is connected to the pump 21 of the conveying component 2, and pollutants can be collected from the water sample conveyed by the conveying component 2. The adsorption tube 3 adopts an enrichment column adsorption tube, and an adsorbent is placed inside the adsorption tube 3. The adsorption tube 3 and the adsorbent inside can adopt existing technology and do not need to be made separately. The external water conveying component also adopts existing technology, and only needs to be able to extract water samples from the sampled water area.

[0056] Through the structure of this scheme, water is continuously pumped in the water area with the help of an external water transport component, and then transported to the water collector 11. The pump 21 of the transport component 2 then extracts water samples from the water collector 11 and transports them to the adsorption tube 3, thereby completing the on-site enrichment of organic pollutants in the water sample.

[0057] On the basis of the above implementation scheme, the enrichment device also includes a shell 4, the main driving structure of the pump 21 is arranged in the shell 4, and a human-machine interaction component 41 is arranged on the shell 4. The human-machine interaction component 41 can adopt existing technologies, such as a touch screen or a control panel, etc. The human-machine interaction component 41 is mainly used to display the sampling time, flow rate, sampling volume, and control the flow rate and start and stop of the peristaltic pump. Its specific implementation form can adopt existing technologies and will not be repeated here.

[0058] On the basis of the above embodiment, the water collector 11 of the water collection assembly 1 is hung on the outside of the housing 4. The outer wall of the housing 4 is provided with a first connecting assembly 42, and the water collector 11 is connected to the housing 4 through the first connecting assembly 42.

[0059] The water collector 11 of this solution is a bottle body, and the first connecting component 42 is a hoop structure that can be opened and closed, which includes a half part 1 fixedly connected to the shell 4, and a half part 2 hinged to the half part 1, and the half part 1 and the half part 2 are connected by a lock hook. The half part 1 and the half part 2 surround to form an annular structure fixed to the water collector 11, and a flexible pad is arranged on the side facing the water collector 11. The water collector 11 is sleeved inside the first connecting component 42.

[0060] On the basis of the above implementation scheme, an overflow hole, a sampling hole and a water inlet hole are respectively provided on the bottle body of the water collector 11. The overflow hole is provided at the top of the bottle body of the water collector 11, the sampling hole is provided at the middle of the side wall of the water collector 11, and the water inlet hole is provided at the lower part of the side wall of the water collector 11. An overflow pipe 12 is provided on the outside of the water collector 11, and the inlet end of the overflow pipe 12 is connected to the overflow hole at the top of the water collector 11. A sampling tube 13 is provided on one side of the middle part of the water collector 11, and the inlet end of the sampling tube 13 is connected to the sampling hole of the water collector 11, and its outlet end is connected to the conveying component 2, and the sampling tube 13 passes through the shell 4 and is connected to the liquid inlet end of the pump 21. The water inlet pipe 14 is connected to the outside of the water inlet hole of the water collector 11, and the inlet end of the water inlet pipe 14 is connected to the external water conveying component, and the outlet end is connected to the lower part of the water collector 11 through the water inlet hole.

[0061] Through this structure, when the collected water sample enters the water collector 11, the accommodating cavity inside the water collector 11 is filled from the bottom of the water collector 11, and the air can be discharged from the overflow pipe 12. When the conveying component 2 starts to extract the water sample, the water sample flows out from the sampling tube 13. In the process of collecting water samples, when the water collector 11 is full, as the water sample continues to be injected into it, the water sample is discharged from the overflow pipe 12 to ensure that the water sample is updated in real time in the water collector 11.

[0062] At the same time, the pump 21, i.e. the peristaltic pump, moves the water sample in the water collector 11 through the adsorption tube 3 at a certain flow rate in a quantitative manner, and the new pollutants in the water will penetrate into the adsorbent of the adsorption tube very evenly, thereby achieving pollutant enrichment.

[0063] On the basis of the above implementation scheme, a water inlet three-way valve 15 is provided at the end of the water inlet pipe 14 away from the water collector 11. One end of the three ports of the water inlet three-way valve 15 is connected to the external water delivery component as the water inlet end; one end is connected to the water inlet pipe 14 as the water outlet end delivered to the water collector 11; and the other end is used as the drainage end. The water inlet three-way valve 15 is a switch three-way valve.

[0064] Because the external water delivery component may have a high pressure during delivery, the flow rate is adjusted through the water inlet three-way valve 15 to slowly input water into the water collector 11.

[0065] On the basis of the above embodiment, the delivery assembly 2 further includes a sample delivery pipeline 22, one end of which is connected to the liquid outlet of the pump 21, and the other end can be connected to the adsorption tube 3. A delivery three-way valve 23 is arranged in the sample delivery pipeline 22, and the delivery three-way valve 23 is a three-way switch valve, one communication path inside the delivery three-way valve 23 is from the liquid outlet of the pump 21 to the liquid inlet of the adsorption tube 3, and the other communication path is from the liquid outlet of the pump 21 to the discharge end.

[0066] By providing the delivery three-way valve 23 , functions such as flushing and shutting off the sample delivery pipeline 22 can be realized.

[0067] On the basis of the above embodiment, a second connecting component 43 is provided on the outer wall of the housing 4 adjacent to the first connecting component 42, and the second connecting component 43 can be hung with the adsorption tube 3. The second connecting component 43 includes a slide rail and a hanger, see Figure 4 The slide rail is a vertical rail structure fixedly arranged on the outer wall of the shell 4. The bracket and the slide rail are slidably connected. The bracket is provided with a plurality of hanging positions for hanging the adsorption tube 3. The hanging position adopts a "C"-shaped groove structure, which allows the adsorption tube 3 to be clamped in the hanging position.

[0068] by Figure 4 Taking the direction as an example, the adsorption tube 3 is arranged horizontally in the hanging position, and the outlet end of the sample delivery pipeline 22 is arranged horizontally toward the adsorption tube 3 on the hanger; a sample delivery connector 24 is arranged at one end of the sample delivery pipeline 22 toward the hanger, and the sample delivery connector 24 can be plugged into the adsorption tube 3.

[0069] Through this structure, multiple adsorption tubes 3 can be hung on the rack according to the needs. When enrichment sampling is performed, it is only necessary to adjust the position of the rack to align the corresponding adsorption tube 3 with the sample delivery connector 24, and then push the adsorption tube 3 to make it slide slightly in the rack and plug it into the sample delivery connector 24. The sample delivery connector 24 adopts an elastic cylindrical structure, which can be sealed after being plugged into the adsorption tube 3.

[0070] Through this structure, multiple adsorption tubes 3 can be directly placed on the outside of the enrichment device, which is convenient for the lacing and switching of the adsorption tubes 3.

[0071] On the basis of the above embodiment, the second connection assembly 43 further includes a baffle 44, which is arranged at the outer edge of the housing 4, and is an "L-shaped" plate made of elastic material. The baffle 44 extends toward the adsorption tube 3, and the baffle 44 is located below the adsorption tube 3 connected to the sample delivery pipeline 22.

[0072] like Figure 4 As shown, the baffle 44 is located below the liquid outlet of the adsorption tube 3 and can also support the adsorption tube 3. With the baffle 44, on the one hand, it plays a certain supporting and lifting role for the adsorption tube 3 being sampled, and on the other hand, it can guide the water sample discharged from the liquid outlet to prevent the water sample from dripping directly onto the adsorption tube 3 below.

[0073] This scheme proposes a method for on-site enrichment of trace organic pollutants in water, including the following steps:

[0074] S1. Setting up the device in the water area where sampling is required. The setting up of the device includes the placement of the aforementioned enrichment device and the setting up of an external water transport component; the external water transport component only needs to be able to pump water from the water area, such as a water pump.

[0075] S2. Connect the pipelines by connecting the water pipe of the external water delivery assembly to the water inlet three-way valve 15 of the device.

[0076] S3. Adjust the water inlet three-way valve 15 so that the water inlet end and the water discharge end of the water inlet three-way valve 15 are connected.

[0077] S4. Open the external water delivery assembly to pump water into the water inlet three-way valve 15 and discharge it directly through the drainage end.

[0078] S5. Adjust the switch of the water inlet three-way valve 15 to allow water to enter the water collector 11 through the water inlet pipe 14 at an appropriate flow rate. The air inside the water collector 11 is discharged through the overflow pipe 12 until the overflow pipe 12 starts to discharge water samples, proving that the water inside the water collector 11 is full.

[0079] S6. Start the pump 21 through the human-machine interaction component 41 to make the sampling tube 13 extract water samples from the water collector 11 and transport the water samples to the adsorption tube 3 through the sample delivery pipeline 22.

[0080] S7. Select an appropriate sampling time according to the actual situation. When the sampling time is met, seal the adsorption tube 3 after sampling, turn off the equipment, and complete the sampling.

[0081] In the description of the present application and its embodiments, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "height", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0082] In the present application and its embodiments, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0083] In the present application and its embodiments, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0084] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0085] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0086] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An on-site enrichment device for trace organic pollutants in water, characterized in that: include: The water collection component includes a water collector, and the water collector has a receiving cavity inside; the receiving cavity inside the water collector is connected with the external water delivery component, and the water collector can receive the original water sample to be sampled; A delivery component, including a pump, the pump and the water collection component are connected through a pipeline, and can extract water samples from the original water sample collected in the water collector; The adsorption tube is connected to the pump of the delivery component and can collect pollutants from the water sample delivered by the delivery component.

2. The on-site enrichment device for trace organic pollutants in water according to claim 1, characterized in that: Also includes: The housing has a driving structure for the pump disposed inside the housing, and a human-machine interaction component is disposed on the housing; and the water collector of the water collection component is disposed outside the housing.

3. The on-site enrichment device for trace organic pollutants in water according to claim 2, characterized in that: The housing further comprises: The first connecting component is arranged on the outside of the shell, and the water collector is connected to the shell through the first connecting component.

4. The on-site enrichment device for trace organic pollutants in water according to claim 2, characterized in that: The water collector is a bottle body, the first connecting component is a hoop body, and the water collector is sleeved inside the first connecting component.

5. The on-site enrichment device for trace organic pollutants in water according to claim 4, characterized in that: The water collection assembly also includes: An overflow pipe, the inlet end of which is connected to the inner top of the water collector; A sampling tube, the inlet end of which is in communication with the interior of the water collector, and the outlet end of which is in communication with the conveying assembly; The water inlet pipe has an inlet end connected to an external water delivery component, and an outlet end connected to the interior of the water collector.

6. The on-site enrichment device for trace organic pollutants in water according to claim 5, characterized in that: A sampling hole is provided on the wall of the water collector corresponding to the inlet end of the sampling tube; a water inlet hole is provided on the wall of the water collector corresponding to the outlet end of the water inlet pipe; The sampling hole is located above the water inlet hole.

7. The on-site enrichment device for trace organic pollutants in water according to claim 5, characterized in that: The water collection assembly also includes: The water inlet three-way valve has one end connected to the external water delivery component as the water inlet end; one end connected to the water inlet pipe as the water outlet end; and the other end as the drainage end.

8. The on-site enrichment device for trace organic pollutants in water according to claim 2, characterized in that: The pump is a peristaltic pump, and the sampling tube passes through the housing and is connected to the liquid inlet end of the pump; The conveying assembly also includes: A sample delivery pipeline, one end of which is connected to the liquid outlet of the pump, and the other end of which can be connected to the adsorption tube; The delivery three-way valve is a three-way switch valve, and the delivery three-way valve is arranged on the sample delivery pipeline.

9. The on-site enrichment device for trace organic pollutants in water according to claim 8, characterized in that: The housing further comprises: The second connecting component is arranged on the outer wall of the shell, and the second connecting component can be hung with the adsorption tube; the second connecting component includes: A slide rail, fixedly arranged on the outer wall of the shell; A hanger, slidably connected to the slide rail, and provided with a plurality of hanging positions for hanging adsorption tubes; The outlet end of the sample delivery pipeline is arranged toward the adsorption tube on the rack; a sample delivery connector is arranged at one end of the sample delivery pipeline toward the rack, and the sample delivery connector can be plugged into the adsorption tube; The second connection component also includes: The baffle is arranged on the outer side of the shell, extends toward the adsorption tube, and is located below the adsorption tube connected to the sample delivery pipeline.

10. A method for on-site enrichment of trace organic pollutants in water, characterized in that: The on-site enrichment device for trace organic pollutants in water as described in claims 1 to 9 comprises the following steps: S1. Setting up the device in the water area where sampling is required, including the placement of the aforementioned enrichment device and the setting of the external water delivery component; the external water delivery component can be used to pump water from the water area, such as a water pump; S2, connect the pipeline, connect the water pipe of the external water delivery assembly and the water inlet three-way valve 15 of the device; S3, adjusting the water inlet three-way valve 15 so that the water inlet end and the water discharge end of the water inlet three-way valve 15 are connected; S4, open the external water delivery assembly, pump water into the water inlet three-way valve 15, and discharge it directly through the drainage end; S5. Adjust the switch of the water inlet three-way valve 15 to allow water to enter the water collector 11 through the water inlet pipe 14 at an appropriate flow rate. The air inside the water collector 11 is discharged through the overflow pipe 12 until the overflow pipe 12 starts to discharge water samples, which proves that the water inside the water collector 11 is full. S6, start the pump 21 through the human-machine interaction component 41, so that the sampling tube 13 extracts water samples from the water collector 11, and transports the water samples to the adsorption tube 3 through the sample delivery pipeline 22; S7. Select an appropriate sampling time according to the actual situation. When the sampling time is met, seal the adsorption tube 3 after sampling, turn off the equipment, and complete the sampling.

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