Deep sea wind tunnel device for simulating corrosion of deep sea environment

Abstract

The invention relates to a deep-sea wind tunnel device for simulating deep-sea environment corrosion, and the device comprises a simulated deep-sea autoclave, a gas-liquid circulation adjustment system and an online detection system which are sequentially connected through a gas-liquid pipeline, and the simulated deep-sea autoclave comprises a sample holder and an electrochemical detection unit. The gas-liquid inflow channel and the gas-liquid outflow channel are used for communicating the interior of the kettle body with the gas-liquid circulation adjusting system; the gas-liquid circulation adjusting system comprises an outflow gas-liquid pressure adjusting flow path and a flow-back gas-liquid pressure adjusting flow path, and the outflow gas-liquid pressure adjusting flow path comprises a back pressure valve; the return gas-liquid pressure regulating flow path comprises a high-pressure circulating pump; the online detection system comprises a liquid storage tank and a plurality of detection sensors arranged in the liquid storage tank. The device can realize real-time detection on the corrosion reaction liquid containing microorganisms with specific concentration without influencing the cultivation of the microorganisms, and can accurately obtain the growth and metabolism physicochemical properties of the microorganisms in a specific temperature field and a specific pressure field, and the adhesion corrosion mechanism of the microorganisms on the surface of a material and the change of the corrosion development process of the microorganisms.

Description

Technical Field

[0001] This invention relates to the field of materials research technology in simulated deep-sea environments, and in particular to a deep-sea wind tunnel device for simulating corrosion in deep-sea environments. Background Technology

[0002] With the advancement of the national strategy for deep-sea and open-sea exploration, my country's research and exploration of deep-sea hydrothermal vents have deepened continuously. To date, my country has discovered dozens of deep-sea hydrothermal vents in the Indian Ocean, the Atlantic Ocean, and the eastern Pacific Ocean. [1] The proven reserves of polymetallic sulfide deposits in deep-sea hydrothermal vent areas are as high as 600 million tons, and exploration is ongoing, with more polymetallic sulfide deposits expected to be discovered. The explored polymetallic sulfide deposits, such as gold, silver, copper, lead, and zinc sulfides, are mainly concentrated at depths of 1000–5000 meters, which is precisely the area where submarine hydrothermal venting is most frequent.

[0003] In 2020, my country's "Fendouzhe" manned submersible successfully descended and landed in the Mariana Trench, reaching a depth of 10,909 meters, marking a major breakthrough in my country's deep-sea equipment technology. However, current deep-sea equipment largely relies on high-cost titanium alloy materials, which severely restricts the large-scale development of deep-sea exploration and exploitation.

[0004] Deep-sea hydrothermal vent areas represent one of the harshest environments and ecosystems in the entire deep sea. The extreme marine environment, characterized by high temperatures, high pressures, and microbial adhesion, severely corrodes exploration and mining equipment. Developing low-cost, high-strength, corrosion-resistant steels adapted to the harsh deep-sea environment has become an urgent strategic need. One of the core challenges lies in understanding the complex mechanisms of microbial adhesion corrosion under the harsh conditions of deep-sea hydrothermal vent areas. The high temperatures and pressures of the deep sea may alter the metabolic activity of microorganisms, the physicochemical properties of biofilms, and their interaction with material surface corrosion.

[0005] The foreign company Cormet uses a flow circulation system to build an experimental simulation platform, controlling the physicochemical parameters of the experimental seawater, such as temperature, pressure, and dissolved oxygen concentration. Guo Weimin et al. developed a multi-channel testing device for the deep-sea corrosion potential and galvanic current of metallic materials. Yin Yansheng et al. studied the electrochemical properties of 2205 steel in a simulated high-temperature and high-pressure region (25–200℃, 20MPa hydrostatic pressure, 3.5% NaCl solution) at the edge of a deep-sea hydrothermal zone. Several domestic research institutes, including the 725th Research Institute of China Shipbuilding Industry Corporation, Beijing University of Science and Technology, Ocean University of China, and the Institute of Metal Research and Institute of Oceanology of the Chinese Academy of Sciences, have conducted fruitful research in the field of deep-sea corrosion and obtained a large amount of experimental data. However, none of the above simulation experiments considered the influence of microbial factors coupled with high-temperature and high-pressure conditions on corrosion.

[0006] Existing experiments using samples attached to actual deep-sea hydrothermal vent areas for corrosion research can obtain real and direct corrosion results, providing corrosion information for equipment in deep-sea hydrothermal vent areas. However, these experiments are greatly affected by unstable factors, such as ocean currents, earthquakes, and tsunamis. It is difficult to control and monitor specific environmental factors, especially microbial factors, in real time. The corrosion development process of materials under specific environmental factors cannot be accurately obtained. Only the corrosion morphology of materials can be observed periodically. The information obtained on specific environmental factors, such as microbial attachment corrosion, is one-sided, limited, and lagging.

[0007] Therefore, it is particularly necessary and urgent to simulate the coupled environment of extreme microorganisms in the high-temperature sea area surrounding the deep-sea hydrothermal vents, and to study the growth, metabolism, physicochemical properties of microorganisms under the special temperature and pressure fields of this environment, as well as their adhesion and corrosion mechanisms on material surfaces. The results of this study will provide strong technical support and guarantee for the design and application of deep-sea equipment, stable operation and maintenance, development and utilization of deep-sea resources, and exploration of the deep-sea ecological environment. Summary of the Invention

[0008] Based on this, the purpose of the present invention is to provide a deep-sea wind tunnel device for simulating corrosion in the deep-sea environment.

[0009] A deep-sea wind tunnel device for simulating corrosion in a deep-sea environment includes:

[0010] It includes a simulated deep-sea autoclave, a gas-liquid circulation regulation system, and an online detection system, which are connected sequentially via gas-liquid pipelines.

[0011] The simulated deep-sea autoclave includes a vessel body, a vessel lid sealed on the vessel body, a sample rack installed inside the vessel body, an electrochemical detection unit that passes through the vessel lid and extends into the vessel body, and a gas-liquid inflow channel and a gas-liquid outflow channel for connecting the vessel body with the gas-liquid circulation regulation system.

[0012] The gas-liquid circulation regulation system includes an outflow gas-liquid pressure regulating flow path and a return gas-liquid pressure regulating flow path. The outflow gas-liquid pressure regulating flow path includes a back pressure valve, which depressurizes the reaction liquid flowing out of the gas-liquid outflow channel and then guides it into the online detection system. The return gas-liquid pressure regulating flow path includes a high-pressure circulation pump, which pressurizes the reaction liquid flowing out of the online detection system and then pumps it back to the simulated deep-sea autoclave through the gas-liquid inflow channel.

[0013] The online detection system includes a liquid storage tank and several detection sensors installed in the liquid storage tank.

[0014] Furthermore, the return gas-liquid pressure regulating flow path also includes a second high-pressure flow channel and a second normal-pressure flow channel. One end of the second high-pressure flow channel is connected to the gas-liquid inflow channel through a first high-pressure needle valve, and the other end of the second high-pressure flow channel is connected to one end of the high-pressure circulating pump. One end of the second normal-pressure flow channel is connected to the other end of the high-pressure circulating pump, and the other end of the second normal-pressure flow channel is connected to the liquid storage tank.

[0015] Furthermore, the second high-pressure flow channel is also provided with a first high-pressure branch, which is sequentially connected to a fourth high-pressure needle valve, a gas booster pump, and a booster gas flow channel.

[0016] Furthermore, the pressurized gas flow channel includes an inert gas pressurized flow channel and an oxygen pressurized flow channel. The inert gas pressurized flow channel is provided with a first high-pressure ball valve, and the oxygen pressurized flow channel is provided with a second high-pressure ball valve.

[0017] Furthermore, a second high-pressure branch is provided on the second high-pressure flow channel. The second high-pressure branch is connected in sequence via a fifth high-pressure needle valve, an atmospheric pressure peristaltic pump, a first atmospheric pressure ball valve, and a liquid storage tank. The gas-liquid pipeline between the atmospheric pressure peristaltic pump and the first atmospheric pressure ball valve also passes through a sterilization chamber.

[0018] Furthermore, the outflowing gas-liquid pressure regulating flow path also includes a first high-pressure flow channel and a first normal-pressure flow channel. One end of the first high-pressure flow channel is connected to the gas-liquid outflow channel through a second high-pressure needle valve, and the other end of the first high-pressure flow channel is connected to one end of a back pressure valve. One end of the first normal-pressure flow channel is connected to the other end of the back pressure valve, and the other end of the first normal-pressure flow channel is connected to a liquid storage tank. A first waste liquid recovery flow channel is also provided on the first high-pressure flow channel, and a third high-pressure needle valve is provided on the first waste liquid recovery flow channel.

[0019] Furthermore, the detection sensor unit includes a fluorescence dissolved oxygen sensor, a pH meter, an in-situ fiber optic OD probe, and an enzyme electrode.

[0020] Furthermore, the liquid storage tank includes an inlet, an outlet, a temperature controller, and a level gauge; the inlet is connected to the outflowing gas-liquid pressure regulating flow path; the outlet is connected to the return gas-liquid pressure regulating flow path; the temperature controller is installed inside the liquid storage tank; and the level gauge is connected to the liquid storage tank.

[0021] Furthermore, the liquid storage tank also includes a displacement gas exhaust channel and a displacement gas inlet channel; a second atmospheric pressure ball valve is also provided on the displacement gas exhaust channel; and a third atmospheric pressure ball valve is also provided on the displacement gas inlet channel.

[0022] Furthermore, the simulated deep-sea high-pressure vessel also includes a heating unit and a stirring unit; the heating unit is located on the outer wall of the vessel body or on the outer side of the bottom of the vessel body, and the heating unit is a resistance wire heater, an electromagnetic induction heater, or an infrared radiation heater; the stirring unit is located at the bottom of the vessel body, and the stirring unit is a magnetic stirrer or a mechanical stirrer.

[0023] Compared with existing technologies, the deep-sea wind tunnel device for simulating deep-sea environment corrosion provided by this invention has the following beneficial effects:

[0024] 1) By setting up a gas-liquid circulation regulation system between the simulated deep-sea autoclave and the online detection system, it is possible to detect the corrosion reaction liquid containing a specific concentration of microorganisms in the simulated deep-sea autoclave in real time without affecting the cultivation of microorganisms in the simulated deep-sea autoclave. It can accurately obtain the growth, metabolism and physicochemical properties of microorganisms under specific temperature and pressure fields, as well as the changes in their adhesion corrosion mechanism and corrosion development process on the material surface. This will provide strong technical support and guarantee for the design, application, stable operation and maintenance of deep-sea equipment, development and utilization of deep-sea resources, and exploration of the deep-sea ecological environment.

[0025] 2) By setting up heating and stirring in the simulated deep-sea autoclave, and combining it with the high-pressure environment provided by the gas-liquid circulation regulation system, the high-temperature, high-pressure, ocean current, and deep-sea hydrothermal environment containing specific concentrations of microorganisms can be simulated in the simulated deep-sea autoclave, making corrosion research more scientific, accurate, and valuable.

[0026] 3) By setting inert gas booster channels and oxygen booster channels in the gas-liquid circulation regulation system, it can be ensured that the gas-liquid circulation regulation system can continuously provide the simulated deep-sea autoclave with the set high pressure and oxygen concentration.

[0027] 4) By setting up an atmospheric pressure peristaltic pump and a sterilization chamber in the gas-liquid circulation regulation system, it can be ensured that the gas-liquid circulation regulation system can provide the simulated deep-sea autoclave with the set atmospheric pressure and can sterilize the atmospheric pressure reaction liquid.

[0028] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings of the embodiments of the present invention.

[0031] To address the shortcomings of existing research devices that simulate deep-sea corrosion environments, which fail to mimic the microbial-coupled deep-sea hydrothermal vent environment and thus lack research on the corrosion mechanisms of materials under high temperature, high pressure, and extreme microbial conditions; and the inability to accurately obtain real-time observations of the corrosion development process of materials in actual deep-sea hydrothermal vent areas when conducting corrosion studies using attached plates, both of which fail to provide an objective and scientific research basis for the design and development of subsequent deep-sea equipment, this invention proposes a deep-sea wind tunnel device for simulating deep-sea environmental corrosion. This device, through research, design, testing, and project verification, thus solves these problems.

[0032] Please see Figure 1 The deep-sea wind tunnel device for simulating deep-sea corrosion proposed in this invention includes: a simulated deep-sea autoclave 10, a gas-liquid circulation regulation system 20, and an online detection system 30 connected sequentially by pipelines. Metal plates are placed inside the simulated deep-sea autoclave 10 and immersed and reacted for a specific time in the simulated deep-sea environment provided by the autoclave 10, characterized by high temperature, high pressure, ocean currents, and a specific concentration of microorganisms. The gas-liquid circulation regulation system 20 then regulates the pressure of the reaction liquid in the simulated deep-sea autoclave 10 and introduces it into the online detection system 30. The online detection system 30 detects the dissolved oxygen content, pH value, OD value, and microbial metabolites of the reaction liquid. Finally, the gas-liquid circulation regulation system 20 regulates the pressure of the reaction liquid in the online detection system 30 and pumps it back into the simulated deep-sea environment. Inside the autoclave 10, microorganisms are continuously cultured under the high temperature and high pressure environment of the simulated deep-sea autoclave 10. Subsequently, after a specific reaction time, the reaction solution of the simulated deep-sea autoclave 10 is introduced into the online detection system 30 for detection and then pumped back into the simulated deep-sea autoclave 10. During this period, the conductivity of the reaction solution in the simulated deep-sea autoclave 10 is detected in real time. In this way, the corrosion development process of metal plates in the deep-sea hydrothermal environment zone with high temperature, high pressure, ocean current, and specific concentration of microorganisms can be obtained, providing an objective and scientific research basis for the subsequent design and development of deep-sea equipment.

[0033] The simulated deep-sea autoclave 10 is used to simulate a deep-sea hydrothermal environment with high temperature, high pressure, ocean currents, and a specific concentration of microorganisms. The simulated deep-sea autoclave 10 includes a vessel body 101, a vessel lid 102, a gas-liquid inflow channel 103, a gas-liquid outflow channel 104, a sample rack 105, an electrochemical detection unit 106, a temperature monitoring unit 107, a pressure monitoring unit 108, a safety valve 109, a heating unit 110, and a stirring unit 111. In use, the sample is hung on the sample holder 105, the lid 102 is closed, and the reaction solution containing a specific concentration of thermophilic and barophilic microorganisms is pumped into the vessel body 101 through the gas-liquid inflow channel 103. The reaction solution in the vessel body 101 is heated by the heating unit 110, and the vessel body 101 is pressurized through the gas-liquid inflow channel 103. The stirring unit 111 is controlled to stir and simulate ocean currents. The temperature and pressure of the reaction solution in the vessel body 101 are monitored by the temperature monitoring unit 107 and the pressure monitoring unit 108. The conductivity of the reaction solution in the vessel body 101 is detected in real time by the electrochemical detection unit 106. After the reaction reaches the set time, the reaction solution is pumped into the vessel body 101 through the gas-liquid outflow channel 104, the online detection system 30, and then through the gas-liquid inflow channel 103 to continue the reaction. The safety valve 109 is used to protect the simulated deep-sea high-pressure vessel 10 from overpressure.

[0034] Specifically, the vessel cover 102 is connected to the top of the vessel body 101 via a flange, and multiple high-strength main bolts and nuts are evenly distributed around the circumference to form a rigid sealing structure.

[0035] The gas-liquid inflow channel 103 has one end that passes through the vessel lid 102 and extends into the vessel body 101, where it is sealed at the point of contact with the vessel lid 102; the other end is located on the outside of the vessel body 101 and communicates with the gas-liquid circulation regulating system 20. Furthermore, a first high-pressure needle valve 1031 is also provided at the other end of the gas-liquid inflow channel 103 communicating with the gas-liquid circulation regulating system 20, for precisely regulating the flow rate of the reaction liquid flowing from the gas-liquid inflow channel 103 into the vessel body 101.

[0036] The gas-liquid outflow channel 104 has one end that passes through the bottom of the vessel body 101 and extends into the vessel body 101, where it is sealed at the point of contact with the bottom of the vessel body 101; the other end is located on the outside of the vessel body 101 and communicates with the gas-liquid circulation regulating system 20. Furthermore, a second high-pressure needle valve 1041 is also provided at the other end of the gas-liquid outflow channel 104 that communicates with the gas-liquid circulation regulating system 20, for precisely regulating the flow rate of the reaction liquid flowing out of the gas-liquid outflow channel 104.

[0037] The sample holder 105 includes a connecting rod and an annular bracket. One end of the connecting rod is located inside the vessel cover 102 and is threaded to the inside of the vessel cover 102, while the other end is located inside the vessel body 101 and is fixedly connected to the annular bracket.

[0038] The electrochemical detection unit 106 includes a reference electrode 1061, a working electrode 1062, and a counter electrode 1063. One end of each of the reference electrode 1061, working electrode 1062, and counter electrode 1063 passes through the vessel lid 102 and extends into the vessel body 101. The areas in contact with the vessel lid 102 are sealed. The electrochemical detection unit 106 is used to detect the conductivity of the reaction solution inside the vessel body 101 in real time, thereby improving the detection of corrosion rates.

[0039] The temperature monitoring unit 107 has one end inserted through the lid 102 and into the vessel body 101 to monitor the temperature of the reaction liquid inside the vessel body 101. All parts of the unit that contact the lid 102 are sealed. Specifically, a thermocouple is used as the temperature monitoring unit.

[0040] The pressure monitoring unit 108 is mounted on the lid 12 and communicates with the vessel body 11. It is used to monitor the pressure inside the vessel body 101, and is sealed at all points where it contacts the lid 102. Specifically, a pressure gauge is used as the pressure monitoring unit.

[0041] The safety valve 109 is installed on the lid 12 and communicates with the vessel body 11, and is used to provide overpressure protection for the simulated deep-sea high-pressure vessel 10.

[0042] The heating unit 110 is disposed on the outer wall of the vessel body 101 or on the outer side of the bottom of the vessel body 101, and is used to heat the reaction liquid inside the vessel body 101. Specifically, a resistance wire heater, an electromagnetic induction heater, or an infrared radiation heater may be used; this application is not limited to these two types.

[0043] The stirring unit 111 is located at the bottom of the vessel body 101 and is used to stir the reaction liquid inside the vessel body 101 to simulate an ocean current. Specifically, magnetic stirring or mechanical stirring can be used, and this application does not impose any restrictions.

[0044] The gas-liquid circulation regulation system 20 includes an outflow gas-liquid pressure regulating flow path 21 and a return gas-liquid pressure regulating flow path 22. The outflow gas-liquid pressure regulating flow path 21 is used to depressurize the reaction liquid flowing out of the gas-liquid outflow channel 104 and introduce it into the online detection system 30. The return gas-liquid pressure regulating flow path 22 is used to pressurize the reaction liquid detected by the online detection system 30 and then pump it back to the simulated deep-sea autoclave 10 through the gas-liquid inflow channel 103 for continuous reaction and high-pressure, high-temperature culture of microorganisms.

[0045] Specifically, the outflowing gas-liquid pressure regulating flow path 21 includes a first high-pressure flow path 210, a back pressure valve 211, and a first normal pressure flow path 212 connected in sequence. One end of the first high-pressure flow path 210 is connected to the gas-liquid outflow channel 104 via a second high-pressure needle valve 1041, and the other end is connected to one end of the back pressure valve 211; the other end of the back pressure valve 211 is connected to one end of the first normal pressure flow path 212; and the other end of the first normal pressure flow path 212 is connected to the online detection system 30.

[0046] Furthermore, a first waste liquid recovery channel 2101 is provided on the first high-pressure channel 210, and a third high-pressure needle valve 2102 is provided on the first waste liquid recovery channel 2101 for adjusting the waste liquid recovery.

[0047] The gas-liquid pressure regulating flow path 22 includes a second high-pressure flow channel 220, a high-pressure circulating pump 221, and a second atmospheric pressure flow channel 222 connected in sequence. One end of the second high-pressure flow channel 220 is connected to the gas-liquid inflow channel 103 via a first high-pressure needle valve 1031, and the other end is connected to one end of the high-pressure circulating pump 221; the other end of the high-pressure circulating pump 221 is connected to one end of the second atmospheric pressure flow channel 222; the other end of the second atmospheric pressure flow channel 222 is connected to the online detection system 30.

[0048] Furthermore, to ensure that the return gas-liquid pressure regulating flow path 22 can provide the set high pressure to the simulated deep-sea autoclave 10, a first high-pressure branch 2201 is also provided on the second high-pressure flow channel 220. The first high-pressure branch 2201 is connected in sequence to a fourth high-pressure needle valve 2202, a gas booster pump 2203 and a booster gas flow channel 2204. The booster gas enters the gas booster pump 2203 through the booster gas flow channel 2204 and is boosted. Then, the booster gas entering the second high-pressure flow channel 220 is regulated by the fourth high-pressure needle valve 2202 to regulate the high pressure inside the simulated deep-sea autoclave 10. The pressurized gas flow channel 2204 includes an inert gas pressurized flow channel 2204a and an oxygen pressurized flow channel 2204b. Further, a first high-pressure ball valve 2205a is provided on the inert gas pressurized flow channel 2204a to control the flow rate of inert gas entering the gas pressurization pump 2203; a second high-pressure ball valve 2205b is provided on the oxygen pressurization flow channel 2204b to control the flow rate of oxygen entering the gas pressurization pump 2203.

[0049] Furthermore, to ensure that the return gas-liquid pressure regulating flow path 22 can provide the set atmospheric pressure to the simulated deep-sea autoclave 10, a second high-pressure branch 2211 is also provided on the second high-pressure flow channel 220. The second high-pressure branch 2211 is connected in sequence to the fifth high-pressure needle valve 2212, the atmospheric pressure peristaltic pump 2213, and the first atmospheric pressure ball valve 2214, and then connected to the storage tank via a gas-liquid pipeline. Furthermore, to ensure that the reaction liquid pumped into the simulated deep-sea autoclave 10 via the second high-pressure branch 2211 is not contaminated, the gas-liquid pipeline between the atmospheric pressure peristaltic pump 2213 and the first atmospheric pressure ball valve 2214 also passes through a sterilization chamber (not shown in the figure).

[0050] The online detection system 30 includes a sealed storage tank 31, a detection sensor unit 32, and a controller 33. The reaction liquid, depressurized by the gas-liquid circulation regulation system 20, enters the storage tank 31. The detection sensor unit 32 transmits data to the controller 33, measuring dissolved oxygen content, pH value, OD value, microbial metabolites, and other parameters. The reaction liquid then flows out of the storage tank 31 and repressurizes in the gas-liquid circulation regulation system 20.

[0051] Specifically, the storage tank 31 includes an inlet 311, an outlet 312, a temperature controller 313, and a level gauge 314. The inlet 311 is connected to the first atmospheric pressure flow channel 212; the outlet 312 is connected to the second atmospheric pressure flow channel 222; the temperature controller 313 is installed in the storage tank 31 and is used to heat the reaction liquid to maintain the temperature of the reaction liquid to meet the temperature set by the simulated deep-sea autoclave 10; the level gauge 314 is connected to the storage tank and is used to display the liquid level of the reaction liquid in the storage tank 31.

[0052] Furthermore, the liquid storage tank 31 also includes a displacement gas exhaust channel 315 and a displacement gas inlet channel 316; a second atmospheric pressure ball valve 315a is also provided on the displacement gas exhaust channel 315; and a third atmospheric pressure ball valve 316a is also provided on the displacement gas inlet channel 316.

[0053] Furthermore, the liquid storage tank 31 also includes a second waste liquid recovery channel 317, and a fourth atmospheric pressure ball valve 317a is also provided on the second waste liquid recovery channel 317.

[0054] The detection sensor unit 32 includes a fluorescence dissolved oxygen sensor 321, a pH meter 322, an in-situ fiber optic OD probe 323, and an enzyme electrode (not shown). The fluorescence dissolved oxygen sensor 321 is used to detect the dissolved oxygen content of the reaction solution; the pH meter 322 is used to detect the pH value of the reaction; the in-situ fiber optic OD probe 323 is used to detect the absorbance OD value of the reaction solution; and the enzyme electrode (not shown) is used to detect the metabolic products of microorganisms in the reaction solution.

[0055] The controller 33 is used to acquire signals transmitted by the fluorescence dissolved oxygen sensor 321, pH meter 322, in-situ fiber optic OD probe 323, and enzyme electrode (not shown), and output dissolved oxygen content, pH value, absorbance OD value, and microbial metabolites according to the signals.

[0056] The deep-sea wind tunnel device for simulating deep-sea environmental corrosion provided by this invention is suitable for simulating high-temperature marine environments surrounding deep-sea hydrothermal vents, where multiple factors are coupled, including temperatures of 35–100°C, pressures of 10–40 MPa, ocean currents, harmful gases (H2S), thermophilic and barophilic microorganisms, and corrosive secretions from large organisms in hydrothermal vent areas.

[0057] Compared with existing technologies, the deep-sea wind tunnel device for simulating deep-sea environment corrosion provided by this invention has the following beneficial effects:

[0058] 1) By setting up a gas-liquid circulation regulation system between the simulated deep-sea autoclave and the online detection system, it is possible to detect the corrosion reaction liquid containing a specific concentration of microorganisms in the simulated deep-sea autoclave in real time without affecting the cultivation of microorganisms in the simulated deep-sea autoclave. It can accurately obtain the growth, metabolism and physicochemical properties of microorganisms under specific temperature and pressure fields, as well as the changes in their adhesion corrosion mechanism and corrosion development process on the material surface. This will provide strong technical support and guarantee for the design, application, stable operation and maintenance of deep-sea equipment, development and utilization of deep-sea resources, and exploration of the deep-sea ecological environment.

[0059] 2) By setting up heating and stirring in the simulated deep-sea autoclave, and combining it with the high-pressure environment provided by the gas-liquid circulation regulation system, the high-temperature, high-pressure, ocean current, and deep-sea hydrothermal environment containing specific concentrations of microorganisms can be simulated in the simulated deep-sea autoclave, making corrosion research more scientific, accurate, and valuable.

[0060] 3) By setting inert gas booster channels and oxygen booster channels in the gas-liquid circulation regulation system, it can be ensured that the gas-liquid circulation regulation system can continuously provide the simulated deep-sea autoclave with the set high pressure and oxygen concentration.

[0061] 4) By setting up an atmospheric pressure peristaltic pump and a sterilization chamber in the gas-liquid circulation regulation system, it can be ensured that the gas-liquid circulation regulation system can provide the simulated deep-sea autoclave with the set atmospheric pressure and can sterilize the atmospheric pressure reaction liquid.

[0062] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments and claims of this application are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that, unless otherwise stated, “a plurality” and “several” refer to two or more; “and / or” refers to and includes any or all possible combinations of one or more associated listed items; “first,” “second,” “third,” etc., are used only to distinguish and not to describe a particular order or sequence, nor should they be construed as indicating or implying relative importance. When the above description relates to drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of this application, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0063] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and the present invention also intends to include these modifications and variations.

Claims

1. A deep-sea wind tunnel device for simulating corrosion in a deep-sea environment, characterized in that, It includes a simulated deep-sea autoclave, a gas-liquid circulation regulation system, and an online detection system, which are connected sequentially via gas-liquid pipelines. The simulated deep-sea autoclave includes a vessel body, a vessel lid sealed on the vessel body, a sample rack installed inside the vessel body, an electrochemical detection unit that passes through the vessel lid and extends into the vessel body, and a gas-liquid inflow channel and a gas-liquid outflow channel for connecting the vessel body with the gas-liquid circulation regulation system. The gas-liquid circulation regulation system includes an outflow gas-liquid pressure regulating flow path and a return gas-liquid pressure regulating flow path. The outflow gas-liquid pressure regulating flow path includes a back pressure valve, which depressurizes the reaction liquid flowing out of the gas-liquid outflow channel and then guides it into the online detection system. The return gas-liquid pressure regulating flow path includes a high-pressure circulation pump, which pressurizes the reaction liquid flowing out of the online detection system and then pumps it back to the simulated deep-sea autoclave through the gas-liquid inflow channel. The online detection system includes a liquid storage tank and several detection sensors installed in the liquid storage tank.

2. The deep-sea wind tunnel device for simulating deep-sea environment corrosion according to claim 1, characterized in that, The gas-liquid pressure regulating flow path further includes a second high-pressure flow channel and a second normal-pressure flow channel. One end of the second high-pressure flow channel is connected to the gas-liquid inflow channel through a first high-pressure needle valve, and the other end of the second high-pressure flow channel is connected to one end of the high-pressure circulation pump. One end of the second normal-pressure flow channel is connected to the other end of the high-pressure circulation pump, and the other end of the second normal-pressure flow channel is connected to the liquid storage tank.

3. The deep-sea wind tunnel device for simulating deep-sea environment corrosion according to claim 2, characterized in that, The second high-pressure flow channel is also provided with a first high-pressure branch, which is sequentially connected to a fourth high-pressure needle valve, a gas booster pump and a booster gas flow channel.

4. The deep-sea wind tunnel device for simulating deep-sea environment corrosion according to claim 3, characterized in that, The pressurized gas flow channel includes an inert gas pressurized flow channel and an oxygen pressurized flow channel. The inert gas pressurized flow channel is equipped with a first high-pressure ball valve, and the oxygen pressurized flow channel is equipped with a second high-pressure ball valve.

5. The deep-sea wind tunnel device for simulating deep-sea environment corrosion according to claim 2, characterized in that, The second high-pressure flow channel is also provided with a second high-pressure branch. The second high-pressure branch is connected in sequence via a fifth high-pressure needle valve, an atmospheric pressure peristaltic pump, a first atmospheric pressure ball valve, and a liquid storage tank. The gas-liquid pipeline between the atmospheric pressure peristaltic pump and the first atmospheric pressure ball valve also passes through a sterilization chamber.

6. The deep-sea wind tunnel device for simulating deep-sea environment corrosion according to claim 1, characterized in that, The outflowing gas-liquid pressure regulating flow path further includes a first high-pressure flow channel and a first normal-pressure flow channel. One end of the first high-pressure flow channel is connected to the gas-liquid outflow channel through a second high-pressure needle valve, and the other end of the first high-pressure flow channel is connected to one end of a back pressure valve. One end of the first normal-pressure flow channel is connected to the other end of the back pressure valve, and the other end of the first normal-pressure flow channel is connected to a liquid storage tank. A first waste liquid recovery flow channel is also provided on the first high-pressure flow channel, and a third high-pressure needle valve is provided on the first waste liquid recovery flow channel.

7. The deep-sea wind tunnel device for simulating deep-sea environment corrosion according to any one of claims 1-6, characterized in that, The detection sensor unit includes a fluorescence dissolved oxygen sensor, a pH meter, an in-situ fiber optic OD probe, and an enzyme electrode.

8. The deep-sea wind tunnel device for simulating deep-sea environment corrosion according to claim 7, characterized in that, The liquid storage tank includes an inlet, an outlet, a temperature controller, and a level gauge; the inlet is connected to an outflow gas-liquid pressure regulating flow path; the outlet is connected to a return gas-liquid pressure regulating flow path; the temperature controller is installed inside the liquid storage tank; and the level gauge is connected to the liquid storage tank.

9. The deep-sea wind tunnel device for simulating deep-sea environment corrosion according to claim 8, characterized in that, The liquid storage tank also includes a displacement gas exhaust channel and a displacement gas inlet channel; a second atmospheric pressure ball valve is also provided on the displacement gas exhaust channel; and a third atmospheric pressure ball valve is also provided on the displacement gas inlet channel.

10. The deep-sea wind tunnel device for simulating deep-sea environment corrosion according to claim 1, characterized in that, The simulated deep-sea high-pressure vessel also includes a heating unit and a stirring unit; the heating unit is located on the outer wall of the vessel body or the outer side of the bottom of the vessel body, and the heating unit is a resistance wire heater, an electromagnetic induction heater, or an infrared radiation heater; the stirring unit is located at the bottom of the vessel body, and the stirring unit is a magnetic stirrer or a mechanical stirrer.

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