Deep water sediment-water interface simulation experimental device

Abstract

The application provides a deep water sediment-water interface simulation experiment device, which comprises a pressure tank, a pressurized gas tank, a circulating water temperature control unit, a sampling tank, a releasing device and a planar light pole unit; the pressurized tank and the sampling tank are connected with the pressure tank, and the sampling tank is used for sampling and sampling; the water inlet and the water outlet of the circulating water temperature control unit are connected with the two sides of the pressure tank; the releasing device and the planar light pole unit are arranged in the pressure tank, the releasing device is used for releasing the sampling device, and the planar light pole unit is used for emitting a fluorescent signal. The application can simulate the hydrostatic pressure, the dissolved oxygen level, the temperature and other related physical and chemical parameters of the water bottom sediment-water interface within 90m, and can reduce the limitation and economic pressure faced by the environmental in-situ monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of experimental simulation equipment, in particular to a deep-water sediment-water interface simulation experimental device. Background Art

[0002] Due to the complex and variable physical and chemical properties of the sediment-water interface, there is a large variability in the migration and transformation of substances near the interface. Therefore, in the environmental field, the distribution and dynamics of substances at the sediment-water interface are very important. In situ sampling techniques are usually used to collect target substances, such as the Diffusive Gradients in Thin-films (DGT) technology, which is based on Fick's first law and is used to obtain the spatial distribution of target substances. HR-Peeper measures the distribution of vertical profiles of substances based on the principle of osmotic balance between inner and outer membranes. It is widely used in the environmental field. However, when it is deployed in situ, especially for deeper water bodies, the deployment / recovery failure is often caused by the variable interface environment, resulting in waste of resources. Therefore, a device that can simulate the sediment-water interface is needed to fill this deficiency.

[0003] Existing simulation devices are usually normal pressure simulations and can only simulate shallow water environments. For pressurized simulation devices, the internal samples are often collected after the pressure is released and the lid is opened. Some indicators are pressure-sensitive, which creates certain obstacles for the interpretation of the results. The material distribution of the sediment itself requires vertical profile sampling technology, which cannot be achieved with existing devices. In order to simulate the environment more accurately, it is necessary to monitor the dissolved oxygen, but the high-pressure dissolved oxygen probe is expensive, and the dissolved oxygen level in the sediment requires microelectrode technology. In order to reduce the cost of the device, this application uses planar photoelectrode technology as a substitute. This technology uses the characteristic emission light of a specific luminescent indicator to correspond to the content of the solute, thereby obtaining a high-resolution distribution of the solute in the water and sediment.

[0004] Patent document with publication number CN118518829A discloses a simulation experimental device for the exchange flux of materials at the sediment-water interface of a lake reservoir. The temperature of the device is controlled by the temperature of the jacket between the inner liner and the outer layer. The temperature of the bottom material changes first, which is a bottom-up change, while the actual temperature change in the lake area is a top-down change. However, the device only realizes the direct measurement of internal temperature and pressure, and does not realize the direct measurement of indicators such as DO and pH; the device has different methods of adding and sampling from the present device. The water sample collected by the device will remain in the pipeline, while the water sample addition and sampling of the device of the present application are in the same sampling tank, which can realize the reflux of residual liquid, and the device of the present application can realize the collection of sediments at a specific depth and the collection of target substances in the vertical profile of the sediment.

[0005] Patent publication number CN114609048A discloses a device for automatically measuring dissolved oxygen and pH at the sediment-water interface. This device uses DO / pH sensors to measure these indicators, uses a circulating water flow to simulate the flow of water at the bottom of a natural water body, and includes a temperature control unit. However, this device is a normal pressure simulation device and can only simulate shallow sediment-water interfaces. Furthermore, it only measures water indicators, lacks a means of detecting sediment indicators, and lacks a dissolved oxygen control unit.

[0006] Patent publication number CN201110849Y discloses an indoor simulation device for studying lake sediment-water interface processes. The device primarily comprises a hydrodynamic perturbation device, an illumination device, a constant-temperature water bath, and an automatic sampling device. However, the patent document still suffers from the drawback of being unable to accurately simulate the experimental environment.

[0007] Patent publication number US20240003800A1 discloses a deep sediment flow culture system that simulates in-situ water pressure. The system specifically includes a flow culture apparatus, an inflow pressurizer, and an outflow pressure reducer, each connected to the flow culture apparatus. The inflow pressurizer includes a pressure tank, an air inlet pipe, a pressure regulating valve, a pressure-resistant container, and a first support. However, this patent document still suffers from the drawback of being unable to accurately simulate the experimental environment. Summary of the Invention

[0008] In view of the defects in the prior art, the purpose of the present invention is to provide a deep-water sediment-water interface simulation experimental device.

[0009] According to the present invention, a deep-water sediment-water interface simulation experimental device is provided, comprising: a pressure tank, a pressurized gas tank, a circulating water temperature control unit, a sampling tank, a delivery device and a planar optode unit;

[0010] The pressurized tank and the sampling tank are connected to the pressure tank, and the sampling tank is used for sampling and injection; both sides of the pressure tank are connected to the water inlet and the water outlet of the circulating water temperature control unit;

[0011] The delivery device and the planar optode unit are arranged inside the pressure tank. The delivery device is used to deliver the sampling device, and the planar optode unit is used to emit a fluorescent signal.

[0012] Preferably, the delivery device comprises: a remote control motor, a rotating shaft, a limiting shaft and a packaging film;

[0013] The sampling device is installed in the pressure tank through the limiting shaft, and the limiting shaft is used to limit and fix the sampling device;

[0014] The packaging film is wrapped around the sampling device, the remote control motor is connected to the packaging film via the rotating shaft, and the packaging film and the sampling device are located in the sediment in the pressure tank;

[0015] When the remote control motor is driven, the remote control motor peels the packaging film off the sampling device via the rotating shaft.

[0016] Preferably, the planar optocoupler unit comprises: an LED array;

[0017] The pressure tank is provided with a window, and a photosensitive film is provided on the window, and the photosensitive film is used to obtain the fluorescent signal emitted by the LED array;

[0018] The pressure tank is provided with a light source external interface, and the light source external interface is connected to the LED array.

[0019] Preferably, the pressure tank comprises a tank body and an acrylic liner, and the acrylic liner is arranged in the tank body;

[0020] The viewing window includes a first viewing window and a second viewing window. The first viewing window is arranged on the acrylic inner liner, and the second viewing window is arranged on the tank body corresponding to the first viewing window.

[0021] Preferably, the sampling tank includes: a first sampling tank;

[0022] The first sampling tank is connected to the pressure tank through a first sampling tank connecting valve. The first sampling tank is provided with a first sampling tank injection valve and a first sampling tank sampling valve.

[0023] Preferably, the sampling tank further comprises: a second sampling tank;

[0024] The second sampling tank is connected to the pressure tank via a second sampling tank connecting valve, and the second sampling tank is provided with a second sampling tank injection valve and a second sampling tank sampling valve.

[0025] Preferably, the pressurized gas tank includes: a helium tank, an oxygen tank and a pressurized gas valve;

[0026] The helium tank is provided with a helium tank valve, and the oxygen tank is provided with an oxygen tank valve. The helium tank valve and the oxygen tank valve are connected to the pressure tank through the pressurizing valve.

[0027] Preferably, the circulating water temperature control unit comprises: a temperature-controlled circulating water pump, a circulating water inlet valve and a circulating water outlet valve;

[0028] The water inlet of the pressure tank is connected to the water outlet of the temperature-controlled circulating water pump through the circulating water inlet valve, and the water outlet of the pressure tank is connected to the water inlet of the temperature-controlled circulating water pump through the circulating water outlet valve.

[0029] Preferably, a dissolved oxygen probe and a pH / ORP probe are provided on the top cover of the pressure tank, and the dissolved oxygen probe and the pH / ORP probe are located inside the pressure tank;

[0030] The pressure tank top cover is provided with a dissolved oxygen probe external interface and a pH / ORP probe external interface, the dissolved oxygen probe external interface is connected to the dissolved oxygen probe, and the pH / ORP probe external interface is connected to the pH / ORP probe.

[0031] Preferably, the pressure tank is provided with a safety valve and a sediment sampling valve.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention has the following significant advantages:

[0034] 1. The present invention can simulate the hydrostatic pressure, dissolved oxygen level, temperature and other relevant physical and chemical parameters of the sediment-water interface within 90 m, alleviating the limitations and economic pressures faced by in-situ environmental monitoring.

[0035] 2. The present invention can realize real-time monitoring of DO, pH and ORP in the tank, obtain higher-precision data, and detect the dissolved oxygen level in the sediment.

[0036] 3. The present invention can realize the collection and addition of materials in the pressure tank and the delivery of DGT under constant pressure, eliminating the influence of the change of hydrostatic pressure on the sediment-water interface.

[0037] 4. The planar optode technology coupled with the present invention can significantly reduce the cost of monitoring.

[0038] 5. The present invention solves the technical problem of how to simulate deep-water environment. The physical and chemical properties of the sediment-water interface are relatively complex, and solves the technical problem of how to monitor the internal environment and how to achieve it using a low-cost and simple-to-operate method.

[0039] 6. The purpose of the simulation of the present invention is to achieve a replacement for the actual in-situ research, so the device should realize the operations such as sample collection and material addition in the in-situ research, especially to minimize the interference with the internal environment (pressure, temperature, gas composition).

[0040] 7. For the simulation cycle, the sampling device of the present invention uses DGT / HR-Peeper. The equilibrium time of DGT / HR-Peeper is generally short, so DGT / HR-Peeper needs to be inserted during the simulation process. Opening the pressurized gas tank will cause a significant change in pressure. In order to reduce the impact of this variable, the device needs to be placed during the pressurization process.

[0041] 8. The present invention adopts the setting of independent inner liner and double sampling tank to realize more control experiments. The internal acrylic liner can be replaced with containers of other sizes and shapes to realize multiple groups of control experiments.

[0042] 9. The DGT / Peeper delivery device of the present invention is relatively independent and can be delivered simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0044] Figure 1 This is a schematic diagram of the overall structure of the deep-water sediment-water interface simulation experimental device;

[0045] Figure 2 To highlight the structural diagram of the pressure tank;

[0046] Figure 3 To highlight the structure of the pressure tank cover and liner Figure 1 ;

[0047] Figure 4 To highlight the structure of the pressure tank cover and liner Figure 2 ;

[0048] Figure 5 A schematic diagram highlighting the structure of the delivery device.

[0049] The figure shows:

[0050] First sampling tank injection valve 1 Helium tank valve 19

[0051] First sampling tank 2 oxygen tank valve 20

[0052] Sampling valve of the first sampling tank 3 Circulating water outlet valve 21

[0053] Pressure gauge 4 Helium tank 22

[0054] Safety valve 5 Oxygen tank 23

[0055] Dissolved oxygen probe external interface 6 First sampling tank connection valve 24

[0056] Pressure tank cover 7 Dissolved oxygen probe 25

[0057] Circulating water inlet valve 8 pH / ORP probe 26

[0058] Light source external interface 9 Second window 27

[0059] Pressure tank 10 Acrylic liner 28

[0060] First viewing window 11 Second sampling tank connecting valve 29

[0061] Sediment sampling valve 12 Heat exchange tube 30

[0062] Temperature controlled circulating water pump 13 LED array 31

[0063] Second sampling tank injection valve 14 remote control motor 32

[0064] Second sampling tank 15 rotating shaft 33

[0065] Second sampling tank sampling valve 16 limit shaft 34

[0066] Pressurized air valve 17 delivery device 35

[0067] pH / ORP probe external interface 18 Packaging film 36 DETAILED DESCRIPTION

[0068] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0069] Example 1:

[0070] like Figure 1-5 As shown, this embodiment provides a deep-water sediment-water interface simulation experimental device, including: a pressure tank 10, a pressurized gas tank, a circulating water temperature control unit, a sampling tank, a delivery device, and a planar photoelectrode unit; the pressurized tank and the sampling tank are connected to the pressure tank 10, and the sampling tank is used for sampling and delivery; the two sides of the pressure tank 10 are connected to the water inlet and outlet of the circulating water temperature control unit; the delivery device and the planar photoelectrode unit are arranged inside the pressure tank 10, the delivery device is used to deliver the sampling device 35, and the planar photoelectrode unit is used to emit a fluorescent signal. The pressure tank 10 is provided with a safety valve 5 and a sediment sampling valve 12. The pressure tank 10 is provided with a pressure gauge 4.

[0071] The sampling tank includes: a first sampling tank 2; the first sampling tank 2 is connected to the pressure tank 10 via a first sampling tank connecting valve 24, and is provided with a first sampling tank sampling valve 1 and a first sampling tank sampling valve 3. The sampling tank also includes: a second sampling tank 15; the second sampling tank 15 is connected to the pressure tank 10 via a second sampling tank connecting valve 29, and is provided with a second sampling tank sampling valve 14 and a second sampling tank sampling valve 16. The pressurized gas tank includes: a helium tank 22, an oxygen tank 23, and a pressurized gas valve 17; the helium tank 22 is provided with a helium tank valve 19, and the oxygen tank 23 is provided with an oxygen tank valve 20. The helium tank valve 19 and the oxygen tank valve 20 are connected to the pressure tank 10 via the pressurized gas valve 17.

[0072] The delivery device includes: a remote control motor 32, a rotating shaft 33, a limiting shaft 34 and a packaging film 36; the sampling device 35 is installed in the pressure tank 10 through the limiting shaft 34, and the limiting shaft 34 is used to limit and fix the sampling device 35; the packaging film 36 is wrapped around the sampling device 35, and the remote control motor 32 is connected to the packaging film 36 through the rotating shaft 33. The packaging film 36 and the sampling device 35 are located in the sediment in the pressure tank 10; when the remote control motor 32 is driven, the remote control motor 32 peels off the packaging film 36 from the sampling device 35 through the rotating shaft 33.

[0073] The sampling device 35 is a DGT / HR-Peeper device structure. The DGT / HR-Peeper is in the shape of a long strip and is directly inserted into the sediment. After a period of time, it is taken out to measure the concentration of the target substance adsorbed by the DGT membrane or the concentration of the target substance in the pore water collected by the HR-Peeper. This device pre-wraps the DGT with a polyethylene packaging film 36 and inserts it into the sediment. When sampling is required, the remote control motor 32 rotates the rotating shaft 33 to peel off the packaging film 36, and the DGT / HR-Peeper is still fixed in the sediment to achieve the above-mentioned sampling operation.

[0074] The circulating water temperature control unit includes: a temperature-controlled circulating water pump 13, a circulating water inlet valve 8 and a circulating water inlet valve 8; the water inlet of the pressure tank 10 is connected to the water outlet of the temperature-controlled circulating water pump 13 through the circulating water inlet valve 8, and the water outlet of the pressure tank 10 is connected to the water inlet of the temperature-controlled circulating water pump 13 through the circulating water outlet valve 21.

[0075] A dissolved oxygen probe 25 and a pH / ORP probe 26 are provided on the pressure tank top cover 7 of the pressure tank 10, and the dissolved oxygen probe 25 and the pH / ORP probe 26 are located inside the pressure tank 10; a dissolved oxygen probe external interface 6 and a pH / ORP probe external interface 18 are provided on the pressure tank top cover 7, and the dissolved oxygen probe external interface 6 is connected to the dissolved oxygen probe 25, and the pH / ORP probe external interface 18 is connected to the pH / ORP probe 26.

[0076] The planar photoelectrode unit includes: an LED array 31; a window is provided on the pressure tank 10, and a photosensitive film is provided on the window, which is used to obtain the fluorescent signal emitted by the LED array 31; a light source external interface 9 is provided on the pressure tank 10, and the light source external interface 9 is connected to the LED array 31.

[0077] The pressure tank 10 includes a tank body and an acrylic liner 28; the acrylic liner 28 is arranged in the tank body, and the windows include a first window 11 and a second window 27. The first window 11 is arranged on the acrylic liner 28, and the second window 27 is arranged on the tank body corresponding to the first window 11.

[0078] The acrylic liner 28 is placed directly inside the tank body, and the circulating water heat exchange pipe 30 is directly connected to the inside of the tank body through a quick-screw straight-through joint, without being directly connected to the acrylic liner 28 .

[0079] This embodiment provides an experimental device, which includes a pressure tank body, a pressurized gas tank, a circulating water temperature control, a sampling / injection tank, a DGT / HR-Peeper delivery device, and a planar optode unit. The sampling / injection tank is connected to the tank body, and its spatial position is adjustable. The pressurized gas tank is connected to the upper part of the tank body. The two sides of the pressure tank are connected to the water inlet and outlet of the circulating water temperature control unit. The DGT delivery device and the planar optode are integrated inside the pressure tank. The specific structure of this embodiment is as follows. Figure 1-5 shown.

[0080] The device of this embodiment can simulate deep water environment, measure physical and chemical parameters in real time, collect and add samples, release DGT / HR-Peeper and measure dissolved oxygen by planar optode. The specific working process is as follows:

[0081] Deepwater environment simulation primarily simulates temperature, pressure, and dissolved oxygen levels. Helium valve 19 and oxygen valve 20 are opened and closed to control the ratio of internal gas components and overall pressure. Pressure gauge 4, dissolved oxygen probe 25, and pH / ORP probe 26 monitor these indicators to further control the dissolved oxygen concentration in the water sample. By opening the circulating water inlet valve 8 and outlet valve 21, and running the temperature-controlled circulating water pump 13, heat is exchanged with the internal environment through the heat exchange tube 30 to achieve temperature control.

[0082] Sample Collection: Close the first sampling tank's injection valve 1 and sampling valve 3, open the first sampling tank connecting valve 24, and, driven by the internal and external pressure differential, press the water sample into the first sampling tank 2. Then, close the first sampling tank connecting valve 24 and open the first sampling tank sampling valve 3 to allow the sample to flow out of the first sampling tank 2. At this point, open the first sampling tank's injection valve 1 to balance the internal and external pressure differential. The same procedure applies to the second sampling tank. Sediment samples are squeezed out of the pressure tank 10 by opening the sediment sampling valve 12, driven by the internal and external pressure differential.

[0083] Sample addition: Close the first sampling tank sampling valve 3 and the first sampling tank connecting valve 24, open the first sampling tank injection valve 1, inject liquid into the first sampling tank 2, close the first sampling tank injection valve 1, open the first sampling tank connecting valve 24, increase the potential of the first sampling tank 2, and allow the internal liquid to flow from the first sampling tank 2 into the acrylic liner 28 in the pressure tank 10 under the action of gravity. The same applies to the second sampling tank.

[0084] DGT / HR-Peeper placement: The remote control motor 32 is connected to the rotating shaft 33, and the DGT / HR-Peeper is pre-buried in the sediment under the packaging film 36. The top of the packaging film is connected to the rotating shaft 33. After the pressure tank is pressurized, at a predetermined time, the remote control motor 32 is turned on to drive the rotating shaft 33 to peel off the packaging film 36 from the outside of the DGT / HR-Peeper, and the DGT / HR-Peeper is fixed in the sediment by the limiting shaft 34, completing the constant pressure placement of the sampling device. The high-pressure window 11 can be used to check whether the placement is successful. After the balance is completed, the pressure is released through the pressurized air valve 17. After the internal and external pressure difference is balanced, the pressure tank top cover 7 is opened to remove the device for subsequent analysis.

[0085] Planar photodeposition method for measuring dissolved oxygen: A photosensitive film is attached to the inside of the second window 27, controlling the on / off of the LED array 31. Fluorescence signals are acquired through the first window 11. The signal data is processed and compared with the values ​​measured by the dissolved oxygen probe 25, generating a signal-concentration curve for the specified operating conditions. This method can be used to measure dissolved oxygen in water and sediments without the dissolved oxygen probe. The first window 11 is a high-pressure window. The second window 27 is a glass window. The LED array 31 is a UV LED array.

[0086] Description of the main features:

[0087] a. The set pressure of the safety valve is lower than the withstand pressure of the pressure tank and the maximum withstand pressure of the internal working components, about 10atm;

[0088] b. The outer diameter of the pressurized gas tank is 325mm, the inner diameter is 319mm, and the height is 300mm. The outer diameter of the acrylic liner is 320mm, the inner diameter is 300mm, and the height is 260mm. The sampling tank volume is 2L, and the tube diameter can be replaced with DN6-15.

[0089] c. The internal exhaust port connected to the pressurized air valve, the position of the sampling tank, the internal sampling port and the internal sampling port of the sediment sampling valve are adjustable;

[0090] d. The heat exchange tube is made of copper;

[0091] e. The glass window and high-pressure window on the acrylic liner have high light transmittance, and the geometric center of the window is 150mm above the bottom of the liner;

[0092] f. The gap between the limiting axes of the DGT / HR-Peeper delivery device is slightly smaller than the thickness of the DGT / HR-Peeper.

[0093] This embodiment can simulate the hydrostatic pressure, dissolved oxygen level, temperature, and other relevant physical and chemical parameters of the bottom sediment-water interface within 90 m, alleviating the limitations and economic pressures faced by in-situ environmental monitoring.

[0094] This embodiment can achieve real-time monitoring of DO, pH, and ORP within the tank, obtain higher-precision data, and detect dissolved oxygen levels in sediments. This embodiment can collect and add substances in the pressure tank and release DGT under constant pressure, eliminating the impact of changes in hydrostatic pressure on the sediment-water interface. The planar optode technology coupled with this embodiment can significantly reduce monitoring costs. The independent inner tank and dual sampling tank settings of this embodiment can achieve more control experiments.

[0095] The acrylic liner in this embodiment can be replaced with containers of other sizes and shapes to facilitate multiple control experiments. The DGT / Peeper delivery devices in this embodiment are relatively independent, allowing both devices to be delivered simultaneously. This embodiment also incorporates a mixing device to rapidly balance dissolved oxygen and temperature.

[0096] The mixing device can be implemented using existing modules: the air inlet's internal air distribution port can be adjusted in spatial position, placed below the water surface. The turbulent flow generated by the incoming air achieves gas-liquid mixing and promotes dissolution equilibrium. Because the circulating water temperature is lower than the ambient temperature of the device, the fluid around the heat exchange tubes is cooler than the entire internal system, allowing mixing to occur through convection.

[0097] The present invention can simulate the hydrostatic pressure, dissolved oxygen level, temperature and other relevant physical and chemical parameters of the bottom sediment-water interface within 90m, alleviating the limitations and economic pressures faced by in-situ environmental monitoring.

[0098] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0099] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A deep-water sediment-water interface simulation experimental device, characterized in that: include: A pressure tank (10), a pressurized gas tank, a circulating water temperature control unit, a sample taking and feeding tank, a delivery device and a planar photoelectrode unit; The pressurized gas tank and the sampling tank are connected to the pressure tank (10), and the sampling tank is used for sampling and injection; both sides of the pressure tank (10) are connected to the water inlet and the water outlet of the circulating water temperature control unit; The delivery device and the planar optode unit are arranged inside the pressure tank (10), the delivery device is used to deliver the sampling device (35), and the planar optode unit is used to emit a fluorescent signal; The delivery device comprises: a remote control motor (32), a rotating shaft (33), a limiting shaft (34) and a packaging film (36); The sampling device (35) is installed in the pressure tank (10) via the limiting shaft (34), and the limiting shaft (34) is used to limit and fix the sampling device (35); The packaging film (36) is wrapped around the sampling device (35), the remote control motor (32) is connected to the packaging film (36) via the rotating shaft (33), and the packaging film (36) and the sampling device (35) are located in the sediment in the pressure tank (10); When the remote control motor (32) is driven, the remote control motor (32) peels the packaging film (36) off the sampling device (35) via the rotating shaft (33).

2. The deep-water sediment-water interface simulation experimental device according to claim 1, characterized in that: The planar photoelectrode unit comprises: an LED array (31); The pressure tank (10) is provided with a viewing window, and a photosensitive film is provided on the viewing window, and the photosensitive film is used to obtain the fluorescent signal emitted by the LED array (31); The pressure tank (10) is provided with a light source external interface (9), and the light source external interface (9) is connected to the LED array (31).

3. The deep-water sediment-water interface simulation experimental device according to claim 2, characterized in that: The pressure tank (10) comprises a tank body and an acrylic liner (28), wherein the acrylic liner (28) is arranged in the tank body; The viewing window comprises a first viewing window (11) and a second viewing window (27), wherein the first viewing window (11) is arranged on the acrylic inner container (28), and the second viewing window (27) is arranged on the tank body corresponding to the first viewing window (11).

4. The deep-water sediment-water interface simulation experimental device according to claim 1, characterized in that: The sampling tank comprises: a first sampling tank (2); The first sampling tank (2) is connected to the pressure tank (10) via a first sampling tank connecting valve (24), and a first sampling tank injection valve (1) and a first sampling tank sampling valve (3) are provided on the first sampling tank (2).

5. The deep-water sediment-water interface simulation experimental device according to claim 4, characterized in that: The sampling tank further comprises: a second sampling tank (15); The second sampling tank (15) is connected to the pressure tank (10) via a second sampling tank connecting valve (29), and a second sampling tank injection valve (14) and a second sampling tank sampling valve (16) are provided on the second sampling tank (15).

6. The deep-water sediment-water interface simulation experimental device according to claim 1, characterized in that: The pressurized gas tank comprises: a helium tank (22), an oxygen tank (23) and a pressurized gas valve (17); The helium tank (22) is provided with a helium tank valve (19), and the oxygen tank (23) is provided with an oxygen tank valve (20). The helium tank valve (19) and the oxygen tank valve (20) are connected to the pressure tank (10) via the pressurizing valve (17).

7. The deep-water sediment-water interface simulation experimental device according to claim 1, characterized in that: The circulating water temperature control unit comprises: a temperature-controlled circulating water pump (13), a circulating water inlet valve (8), and a circulating water outlet valve (21); The water inlet of the pressure tank (10) is connected to the water outlet of the temperature-controlled circulating water pump (13) via the circulating water inlet valve (8), and the water outlet of the pressure tank (10) is connected to the water inlet of the temperature-controlled circulating water pump (13) via the circulating water outlet valve (21).

8. The deep-water sediment-water interface simulation experimental device according to claim 1, characterized in that: A dissolved oxygen probe (25) and a pH / ORP probe (26) are provided on the pressure tank top cover (7) of the pressure tank (10), and the dissolved oxygen probe (25) and the pH / ORP probe (26) are located inside the pressure tank (10); The pressure tank top cover (7) is provided with a dissolved oxygen probe external interface (6) and a pH / ORP probe external interface (18), the dissolved oxygen probe external interface (6) is connected to the dissolved oxygen probe (25), and the pH / ORP probe external interface (18) is connected to the pH / ORP probe (26).

9. The deep-water sediment-water interface simulation experimental device according to claim 1, characterized in that: The pressure tank (10) is provided with a safety valve (5) and a sediment sampling valve (12).

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