A multifunctional visualization device suitable for high-temperature corrosion and phase change reaction systems

Abstract

The application discloses a multifunctional visual device suitable for high-temperature corrosion and phase change reaction systems, which comprises a reaction kettle, a corrosion-resistant transparent sealing temperature insulation cover, a multi-angle high-definition probe, an intelligent display, a gas detection system, a pressure regulating system, a condensate water system and a metal rod. The device is adapted to high-temperature and strong corrosive environment through corrosion-resistant materials and a double-layer heat insulation structure. The device can capture gas-liquid flow, phase change, bubble behavior and extraction process in real time. In combination with the pressure regulating system, the device can stabilize the pressure in the reaction kettle and ensure the safe operation of the phase change system. The device can be extended to various reaction systems such as molten salt and liquid metal, and can provide high-precision dynamic data for high-temperature corrosion, phase change and multiphase reaction research. The multifunctional visual device has simple structure and small investment, and can be used as a heating device for laboratory research, especially in the field of molten salt pyrolysis research. The device can directly observe the pyrolysis change and bubble behavior under the heating state, and obtain relevant kinetic parameters.

Description

Technical Field

[0001] This invention relates to the fields of high-temperature reaction engineering and multiphase flow analysis technology, specifically to a multifunctional visualization device suitable for high-temperature corrosion and phase change reaction systems. Background Technology

[0002] In the study of high-temperature corrosive reaction systems (such as chlorine / sulfur-containing molten salts and liquid metals) and phase transformation processes (such as melt-solidification and gas-liquid two-phase flows), real-time observation of reaction dynamics is crucial for understanding reaction mechanisms and optimizing process parameters. However, existing technologies have the following problems:

[0003] Traditional reactors and observation windows are difficult to withstand high temperatures and highly corrosive media (such as molten salts of halides), and the sudden change in volume after the material cools may damage existing visualization equipment, resulting in short device life and distorted observations.

[0004] Existing visualization devices mostly focus on bubble behavior, lacking the ability to simultaneously capture gas-liquid flow, phase change interfaces, and multiphase mass transfer processes, making it difficult to fully present the complex phenomena in the reaction process.

[0005] To address the aforementioned issues, there is an urgent need for a visualization device that is corrosion-resistant, high-temperature resistant, allows for direct observation, and is suitable for multi-reaction systems, in order to support in-depth research on complex reaction systems under extreme environments. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a multifunctional visualization device suitable for high-temperature corrosion and phase change reaction systems, in order to support in-depth research on complex reaction systems under extreme environments.

[0007] The objective of this invention is achieved through the following technical solution: a multifunctional visualization device suitable for high-temperature corrosion and phase change reaction systems, comprising a reaction vessel, a multi-angle high-definition probe, a metal rod, a smart display, a corrosion-resistant transparent sealed heat insulation cover, and a temperature controller; the reaction vessel comprises a first vessel body and a second vessel body, which are connected; the multi-angle high-definition probe is connected to the smart display via the metal rod and is placed inside the first vessel body, encased by the corrosion-resistant transparent sealed heat insulation cover; the multi-angle high-definition probe and the corrosion-resistant transparent sealed heat insulation cover are positioned above the liquid phase inside the first vessel body before the reaction begins;

[0008] The first vessel is connected to a first nitrogen cylinder to purge the air from the first vessel before the reaction; the first vessel is also connected to a gas cylinder containing the target gas; the second vessel is connected to a second nitrogen cylinder to pressurize the second vessel, causing the liquid phase in the first vessel to rise and immerse the multi-angle high-definition probe.

[0009] Both the first vessel and the second vessel are provided with gas outlets; the gas outlet of the first vessel is connected to a gas detection device for analyzing the composition of the product gas.

[0010] The temperature controller is used to control the temperature to cause phase changes and to monitor the temperature in real time through a temperature measuring device.

[0011] The inner wall of the corrosion-resistant transparent sealing and heat insulation cover is provided with a condensate pipe; the condensate pipe is connected to an external condensate system to maintain condensate circulation.

[0012] Furthermore, the metal rod is a corrosion-resistant metal component with poor thermal conductivity.

[0013] Furthermore, the outer side of the reactor is provided with a heating layer, a heat insulation layer and an air insulation layer; the reactor adopts a double-layer structure, with the inner layer being a high-temperature and corrosion-resistant metal material and the outer layer being a heat insulation material.

[0014] Furthermore, a heating jacket is provided inside the heating layer; the temperature controller includes a thermocouple for measuring the temperature of the raw material and a temperature control terminal for controlling the temperature of the heating jacket, controlling the temperature to cause phase change and monitoring the temperature in real time through the thermocouple.

[0015] Furthermore, both the first nitrogen cylinder and the cylinder containing the target gas are connected to the first vessel body via gas pipes, and the second nitrogen cylinder is also connected to the second vessel body via gas pipes. The gas pipes are equipped with flow meters and regulating valves.

[0016] Furthermore, the gas detection device is a gas chromatograph.

[0017] Furthermore, a gas separator is connected to the gas outlet of the first vessel.

[0018] Furthermore, the volume of the first vessel is smaller than the volume of the second vessel.

[0019] Further, the liquid phase is any one of molten mixed carbonates, mixed sulfates, mixed nitrates, mixed chlorides, tin alloys, and aluminum alloys; the target gas is any one of methane, ethane, hydrogen sulfide, and ammonia. The selection can be made according to the experimental purpose, such as pyrolysis of methane in molten chlorides, thermal cracking of ethane in molten carbonates, or cracking of methane in molten tin alloys.

[0020] The present invention also provides a method of using the aforementioned multifunctional visualization device suitable for high-temperature corrosion and phase transformation reaction systems, comprising:

[0021] Turn on the temperature controller and set the heating program to heat the reactor so that the target raw material is completely melted;

[0022] Open the first nitrogen cylinder to purge the air from the first reactor; open the condensate system to introduce circulating condensate and open the second nitrogen cylinder to pressurize the second reactor, causing the liquid level in the first reactor to rise until the multi-angle high-definition probe is submerged;

[0023] The gas cylinder containing the target gas is opened, and the composition of the product gas is analyzed in real time through a gas detection device during the reaction process. The images captured by the multi-angle high-definition probe are displayed in real time on the intelligent display.

[0024] After the reaction is complete, stop the flow of the target gas, stop heating, open the gas outlet of the second vessel, and the liquid level in the first vessel drops to below the multi-angle high-definition probe, so that the liquid levels in the first and second vessels are level.

[0025] After cooling, turn off the condensate system.

[0026] The device of this invention uses corrosion-resistant materials, multidimensional dynamic observation technology and control system to realize real-time monitoring and analysis of complex phenomena such as gas-liquid flow, phase change interface evolution and extraction mass transfer in molten salt, liquid metal and gas-liquid-solid multiphase systems. It is suitable for research and process optimization in the fields of energy chemical industry, metallurgy and materials science.

[0027] The device constructed in this invention, through the combined use of a corrosion-resistant transparent sealed heat insulation cover, a multi-angle high-definition probe, a metal rod and a smart display, and nitrogen pressurization, allows for intuitive and clear observation of gas-liquid flow, phase change, bubble behavior and extraction process on an external display, which is of great significance for in-depth research on the reaction process.

[0028] In this invention, the reaction vessel includes a first vessel body and a second vessel body, which are connected. The second vessel body is connected to a second nitrogen cylinder for pressurizing the second vessel body, causing the liquid phase in the first vessel body to rise and immerse the multi-angle high-definition probe. Instead of directly using a movable metal rod to immerse the multi-angle high-definition probe, the primary and most critical reason is the issue of sealing. If the moving parts are used for observation during the experiment, the sealing cannot be guaranteed, leading to outside air entering the reaction vessel and gas leakage. While the design of this invention allows for pressure adjustment to raise the liquid level based on different raw materials, the movable rod is difficult to control to the required length. For example, if a 10cm dip is needed to change the raw material or a 20cm dip is needed due to a decrease in the raw material quantity, moving the rod again would cause vibration or agitation, potentially disrupting the reaction process. Furthermore, because the raw material solidifies upon cooling, the probe must be kept on the liquid surface before cooling, which is still at a high temperature, posing a risk to operation. Lowering the probe also occurs at a high temperature, similarly carrying operational risks.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] (1) Existing devices are difficult to monitor and analyze in real time the complex phenomena such as gas-liquid flow, phase change interface evolution, and extraction mass transfer in molten salt, liquid metal, and gas-liquid-solid multiphase systems. However, this invention achieves real-time and intuitive observation of high-temperature corrosion and phase change reaction processes by combining a multi-angle high-definition probe, a metal rod, a corrosion-resistant transparent sealed heat insulation cover, and an intelligent display. Researchers can clearly observe details including changes in the form of matter, bubble generation and movement, which provides a basis for a deeper understanding of the reaction process and mechanism.

[0031] (2) Based on the visualization function, i.e., through the real-time images captured by multi-angle high-definition probes, the kinetic parameters related to the reaction process can be accurately obtained. For example, by observing and analyzing the trajectory of bubble movement, size changes, and generation frequency, key kinetic data such as gas generation rate and diffusion rate can be calculated. This is of great significance for establishing and verifying reaction kinetic models, and helps to study the rate-controlling steps and influencing factors of the reaction in greater depth, providing solid data support for optimizing reaction conditions.

[0032] (3) For high-temperature corrosion and phase change reaction systems where the volume changes abruptly after the phase change, existing visualization devices are difficult to adapt to this special environment. The multi-angle high-definition probe, metal rod and high-temperature resistant transparent sealing insulation cover can be disassembled for cleaning or replacement. The metal rod is connected to the vessel cover and the high-temperature resistant transparent sealing insulation cover by flanges. This design facilitates the maintenance and upkeep of the device, ensures the stable performance of the device, and extends the service life of the device.

[0033] (4) This invention addresses molten salt pyrolysis systems and is applicable to the pyrolysis reaction research of various molten salt systems (such as lithium carbonate-sodium carbonate-potassium carbonate ternary molten carbonate, lithium nitrate-sodium nitrate-potassium nitrate ternary molten nitrate, or lithium sulfate-sodium sulfate-potassium sulfate ternary molten sulfate, etc.) and different gaseous raw materials. The heating temperature (400-800℃), pressure, raw material and condensate flow rate can be flexibly adjusted according to experimental requirements. In contrast, existing technologies are often only applicable to specific reaction systems or conditions, and have a narrow range of applications.

[0034] (5) The design of the left side of the reactor being smaller than the right side allows for precise control of the liquid level rise on the left side by adjusting the pressure on the right side. This invention focuses on the height and control of the liquid level rise, unlike hydraulic presses which focus on force amplification.

[0035] (6) Due to the characteristic that molten salt systems are easy to cool and solidify, the flow rate of condensate should not be too large and should be adjusted according to the type of molten salt. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the visualization device constructed for this invention applied to the molten salt pyrolysis of methane operation process.

[0038] Figure 2 This is a diagram showing the molten salt after heating and cooling to solidify.

[0039] Figure 3 Diagram of a corrosion-resistant, transparent, sealed, and heat-insulating cover.

[0040] Figure 4 This is a diagram of a multifunctional visualization device for high-temperature corrosion and phase change reaction systems constructed according to the present invention.

[0041] Attached reference numerals: 1-Reaction vessel, 2-Insulation layer, 3-Heating layer, 4-Thermocouple, 5-Air insulation layer, 6-Temperature controller, 71-First nitrogen cylinder, 72-Second nitrogen cylinder, 8-Cylinder containing target gas, 9-Flow meter, 10-Regulating valve, 11-Inlet, 12-Gas separator, 13-Gas detection device, 14-Outlet, 15-Multi-angle high-definition probe, 16-Metal rod, 17-Intelligent display, 18-Temperature control terminal, 19-Corrosion-resistant transparent sealed insulation cover, 20-Condensate system, 21-Transparent quartz cover, 22-Condensate pipe. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0043] Example 1: As Figure 4 As shown, a multifunctional visualization device suitable for high-temperature corrosion and phase change reaction systems includes a reaction vessel 1, a multi-angle high-definition probe 15, a metal rod 16, a smart display 17, a corrosion-resistant transparent sealed heat insulation cover 19, and a temperature controller 6. The reaction vessel 1 includes a first vessel body and a second vessel body, which are connected (generally, their lower parts or bottoms are connected). The multi-angle high-definition probe 15 is connected to the smart display 17 via the metal rod 16 and is placed inside the first vessel body, wrapped by the corrosion-resistant transparent sealed heat insulation cover 19. Before the reaction begins, the multi-angle high-definition probe 15 and the corrosion-resistant transparent sealed heat insulation cover 19 are positioned above the liquid phase inside the first vessel body.

[0044] The first vessel is connected to a first nitrogen cylinder 71, which is used to purge the air in the first vessel before the reaction; the first vessel is also connected to a gas cylinder 8 containing the target gas; the second vessel is connected to a second nitrogen cylinder 72, which is used to pressurize the second vessel, so that the liquid phase in the first vessel rises to immerse the multi-angle high-definition probe 15; and can also stabilize the pressure inside the reaction vessel to ensure the safe operation of the phase change system.

[0045] Both the first vessel and the second vessel are provided with gas outlets; the gas outlet of the first vessel is connected to a gas detection device 13 for analyzing the composition of the product gas.

[0046] The temperature controller 6 is used to control the temperature to cause phase changes and to monitor the temperature in real time through a temperature measuring device.

[0047] See Figure 3 The inner wall of the corrosion-resistant transparent sealing and heat insulation cover 19 is provided with a condensate pipe 22; the condensate pipe 22 is connected to a condensate system 20 to maintain condensate circulation.

[0048] In one embodiment, the first nitrogen cylinder 71 and the gas cylinder 8 containing the target gas are both connected to the first vessel body via gas pipes (the first vessel cover is provided with a corresponding gas inlet 11), and the second nitrogen cylinder 72 is also connected to the second vessel body via gas pipes (the second vessel cover is provided with a corresponding gas inlet). The gas pipes are equipped with a flow meter 9 (such as a rotor flow meter) and a regulating valve 10.

[0049] In one embodiment, the metal rod 16 is a corrosion-resistant metal component with poor thermal conductivity. The metal rod 16 is made of a corrosion-resistant metal material with low thermal conductivity to avoid thermal damage to the multi-angle high-definition probe 15 and related connecting lines. The metal rod 16 is a hollow rod, providing space for the wired connection between the multi-angle high-definition probe and the smart display.

[0050] In one embodiment, the side of the reactor 1 is provided with a heating layer 3, a heat insulation layer 2 and an air insulation layer 5 in sequence. The reactor body adopts a double-layer structure, with the inner layer being a high-temperature and corrosion-resistant metal material and the outer layer being a heat insulation material, so as to improve the heat insulation performance of the reactor.

[0051] In one embodiment, the temperature controller 6 includes a thermocouple 4 for measuring the temperature of the material and a temperature control terminal 18 for controlling the temperature of the heating jacket. The temperature is controlled to cause phase change, and the temperature is monitored in real time by the thermocouple. The heating jacket is disposed inside the heating layer.

[0052] In one embodiment, the corrosion-resistant transparent sealing and heat insulation cover 19 is made of a material that is resistant to high temperature and corrosion and has good transparency (such as quartz) to ensure that it can effectively insulate against heat and not be corroded in the environment of high temperature pyrolysis and corrosive raw materials, and to ensure that the multi-angle high-definition probe 15 can clearly observe the situation inside the reactor. The intelligent display 17 can display the image observed by the multi-angle high-definition probe 15 in real time.

[0053] In one embodiment, the corrosion-resistant transparent sealing and heat-insulating cover 19 consists of a transparent quartz cover 21 and a condensate pipe 22. The condensate pipe 22 is arranged on the inner wall of the transparent quartz cover 21. The condensate pipe 22 is connected to a condensate system 20 to maintain condensate circulation, which can better protect the multi-angle high-definition probe 15. For molten salt systems, the condensate flow rate should not be too large and needs to be adjusted according to the type of molten salt.

[0054] In one embodiment, the first vessel body and the second vessel body are respectively equipped with a first vessel cover and a second vessel cover, which are detachable and ensure the airtightness of the vessel body; the metal rod 16 is connected to the first vessel cover and the corrosion-resistant transparent sealing and heat insulation cover 19 by flanges, that is, the multi-angle high-definition probe 15, the metal rod 16 and the corrosion-resistant transparent sealing and heat insulation cover 19 can be disassembled for cleaning or replacement. This design facilitates the maintenance and upkeep of the device, ensures the stable performance of the device, and extends the service life of the device.

[0055] This invention's device is applicable to various molten salt systems, including mixed carbonates, mixed sulfates, mixed nitrates, mixed chlorides, tin alloys, and aluminum alloys. Examples include lithium carbonate-sodium carbonate-potassium carbonate ternary molten carbonates, lithium nitrate-sodium nitrate-potassium nitrate ternary molten nitrates, and lithium sulfate-sodium sulfate-potassium sulfate ternary molten sulfates. The device is recyclable, and the molten salt temperature is stabilized at 400-800℃. The target gas is any one of methane, ethane, hydrogen sulfide, and ammonia.

[0056] In one embodiment, see Figure 4 The volume of the left reaction vessel (i.e., the first vessel) of the device of the present invention is smaller than the volume of the right reaction vessel (i.e., the second vessel). This design allows the rise height of the liquid level on the left side to be precisely controlled by adjusting the pressure on the right side.

[0057] In one embodiment, the gas outlet of the first vessel is connected to a gas separator for recovering unreacted target gas and separating product gas.

[0058] In one embodiment, the gas cylinder containing the target gas also contains an inert gas to reduce the methane concentration and prevent the reaction from becoming too violent, thus enhancing safety. The ratio of the target gas to the inert gas is any ratio from 3 to 5:1, such as 3:1, 5:1, ..., preferably 4:1.

[0059] Example 2 (using a ternary mixed carbonate of lithium carbonate, sodium carbonate, and potassium carbonate and methane as an example):

[0060] Comparison Figure 1 The present invention provides a multifunctional visualization device suitable for high-temperature corrosion and phase transformation reaction systems, and its usage is as follows:

[0061] 1) See Figure 2 The reactor temperature is set to rise to 500℃ at a rate of 10℃ / min and maintained for 15-20 minutes until 100g of the lithium carbonate-sodium carbonate-potassium carbonate ternary mixed carbonate is completely melted in the reactor. (In this embodiment, the ratio of lithium carbonate-sodium carbonate-potassium carbonate is 3:3:4; in some embodiments, it can be any ratio from 3:2 to 4:3 to 5, such as 3:2:3, 3:2:5, 3:4:3, 3:4:5, etc., which will not be elaborated here.)

[0062] 2) Open the nitrogen cylinder on the left, adjust the flow rate to 0.4 L / min, purge for 30 minutes to remove all air, then close the cylinder. Open the condensate system and adjust the flow rate to 8 L / min. Open the nitrogen cylinder on the right, adjust the flow rate to 1 L / min to pressurize the left reactor so that the molten salt level drops on the right and rises on the left until it reaches the high-definition probe, then close the cylinder.

[0063] 3) Open the methane cylinder on the left that has been diluted with argon (20 vol.% CH4 - 80 vol.% Ar), adjust the flow rate to 10 mL / min, and analyze the composition of the product gas in real time using an online gas chromatograph during the reaction. The image captured by the high-definition probe is displayed on the monitor in real time.

[0064] 4) After the reaction is complete, stop the methane supply, turn off the reactor heating switch, open the right-side outlet to release nitrogen gas, causing the pressure to drop and the molten salt level to drop below the high-definition probe and be level on both sides.

[0065] 5) After cooling, turn off the condensate system and remove the corrosion-resistant transparent sealing insulation cover for cleaning or replacement.

[0066] In this embodiment, the gas separator is used to recover unreacted methane while separating the product hydrogen.

[0067] In some embodiments, the ternary carbonate in Example 2 can be replaced with a ternary chloride, a ternary nitrate, or a ternary sulfate, with corresponding adjustment temperatures of 800°C, 400°C, and 600°C, and corresponding condensate flow rates of 10 L / min, 5 L / min, and 7 L / min, respectively.

[0068] Among them, the ternary chloride salt is a lithium chloride-sodium chloride-potassium chloride ternary chloride salt, and its ratio is any ratio of 2~3:2~5:3~5, such as 2:2:3, 2:2:5, 2:5:3, 2:5:5, 3:2:3, 3:2:5, 3:5:3, 3:5:6, ..., which will not be elaborated here.

[0069] Ternary nitrates are lithium nitrate-sodium nitrate-potassium nitrate ternary nitrates, with a ratio of 3~4:1~2:2~4, such as 3:1:2, 3:1:4, 3:2:2, 3:2:4, 4:1:2, 4:1:4, 4:2:2, 4:2:4, ..., which will not be elaborated here.

[0070] The ternary sulfate is a lithium sulfate-sodium sulfate-potassium sulfate ternary sulfate, and its ratio is any ratio of 2~3:4~5:2~3, such as 2:4:2, 2:4:3, 2:5:2, 2:5:3, 3:4:2, 3:4:3, 3:5:2, 3:5:3, ..., which will not be elaborated here.

[0071] It should be noted that in other embodiments of the present invention, other different solutions obtained by making specific selections within the range of steps, components, proportions, and process parameters described in the present invention can all achieve the technical effects described in the present invention, so the present invention will not list them one by one.

[0072] The above embodiments are only used to illustrate the design concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in the present invention are within the protection scope of the present invention.

Claims

1. A multifunctional visualization device suitable for high-temperature corrosion and phase transformation reaction systems, characterized in that, The device includes a reaction vessel, a multi-angle high-definition probe, a metal rod, a smart display, a corrosion-resistant transparent sealing and insulation cover, and a temperature controller. The reaction vessel includes a first vessel body and a second vessel body, which are connected to each other. The multi-angle high-definition probe is connected to the smart display via the metal rod and is placed inside the first vessel body, encased by the corrosion-resistant transparent sealing and insulation cover. The multi-angle high-definition probe and the corrosion-resistant transparent sealing and insulation cover are positioned above the liquid phase inside the first vessel body before the reaction begins. The first vessel is connected to a first nitrogen cylinder to purge the air from the first vessel before the reaction; the first vessel is also connected to a gas cylinder containing the target gas; the second vessel is connected to a second nitrogen cylinder to pressurize the second vessel, causing the liquid phase in the first vessel to rise and immerse the multi-angle high-definition probe. Both the first vessel and the second vessel are provided with gas outlets; the gas outlet of the first vessel is connected to a gas detection device for analyzing the composition of the product gas. The temperature controller is used to control the temperature to cause phase changes and to monitor the temperature in real time through a temperature measuring device. The inner wall of the corrosion-resistant transparent sealing and heat insulation cover is provided with a condensate pipe; the condensate pipe is connected to an external condensate system to maintain condensate circulation.

2. The apparatus according to claim 1, characterized in that, The metal rod is a corrosion-resistant metal component with poor thermal conductivity.

3. The apparatus according to claim 1, characterized in that, The reactor is provided with a heating layer, a heat insulation layer and an air insulation layer on the outside; the reactor adopts a double-layer structure, with the inner layer being a high-temperature and corrosion-resistant metal material and the outer layer being a heat insulation material.

4. The apparatus according to claim 3, characterized in that, The heating layer is equipped with a heating jacket; the temperature controller includes a thermocouple for measuring the temperature of the raw material and a temperature control terminal for controlling the temperature of the heating jacket, controlling the temperature to cause phase change and monitoring the temperature in real time through the thermocouple.

5. The apparatus according to claim 1, characterized in that, The first nitrogen cylinder and the gas cylinder containing the target gas are both connected to the first vessel body via gas pipes, and the second nitrogen cylinder is also connected to the second vessel body via gas pipes. The gas pipes are equipped with flow meters and regulating valves.

6. The apparatus according to claim 1, characterized in that, The gas detection device is a gas chromatograph.

7. The apparatus according to claim 1, characterized in that, A gas separator is connected to the gas outlet of the first vessel.

8. The apparatus according to claim 1, characterized in that, The volume of the first vessel is smaller than the volume of the second vessel.

9. The apparatus according to claim 1, characterized in that, The liquid phase is any one of molten mixed carbonates, mixed sulfates, mixed nitrates, mixed chlorides, tin alloys, and aluminum alloys; the target gas is any one of methane, ethane, hydrogen sulfide, and ammonia.

10. A method of using the multifunctional visualization device for high-temperature corrosion and phase transformation reaction systems as described in claim 1, characterized in that, include: Turn on the temperature controller and set the heating program to heat the reactor so that the target raw material is completely melted; Open the first nitrogen cylinder to purge the air from the first reactor. Turn on the condensate system to introduce circulating condensate and turn on the second nitrogen cylinder to pressurize the second vessel, so that the liquid level in the first vessel rises to the point where the multi-angle high-definition probe is submerged; The gas cylinder containing the target gas is opened, and the composition of the product gas is analyzed in real time through a gas detection device during the reaction process. The images captured by the multi-angle high-definition probe are displayed in real time on the intelligent display. After the reaction is complete, stop the flow of the target gas, stop heating, open the gas outlet of the second vessel, and the liquid level in the first vessel drops to below the multi-angle high-definition probe, so that the liquid levels in the first and second vessels are level. After cooling, turn off the condensate system.

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