High-temperature water oxygen corrosion cavity structure

Abstract

The utility model relates to a high-temperature water oxygen corrosion cavity structure, and belongs to the technical field of material testing equipment. Aiming at the problems of difficulty in testing complicated or tiny parts, insufficiency in waste gas and wastewater treatment, incompatibility with external heating equipment, difficulty in accurately controlling a water-gas ratio and the like in the conventional tubular furnace cavity water-oxygen corrosion device, a novel structure is provided. The structure comprises a water-oxygen corrosion cavity, a corundum sealing plug, a conveying pipe, a sealing flange, a flange end cover, a water-oxygen corrosion bracket and the like. The water-oxygen corrosion cavity is a cylindrical isostatic pressing alundum tube, and the support is provided with grooves with specific angles and number and long protrusions. The sealing flange has a double-ring or water-cooling form and is further provided with a gas and liquid recovery port, and the corundum sealing plug is of a hollow frustum structure and is further provided with a fire-resistant ring. The structure enables mixed gas to be in uniform contact with a sample, accurately controls test conditions, is beneficial to environmental protection, and can be matched with external heating equipment to guarantee stable and accurate test.

Description

Technical Field

[0001] This utility model belongs to the technical field of material testing equipment, and in particular relates to a high-temperature water-oxygen corrosion chamber structure. Background Technology

[0002] The water-oxygen corrosion apparatus plays a crucial role in materials research. It simulates the corrosion conditions materials may face in real industrial environments, providing key information for material selection, design, and optimization. This apparatus possesses multiple functions. It can generate and maintain a high-temperature, high-pressure water environment, with temperatures reaching hundreds of degrees Celsius, and precisely control the dissolved oxygen content. The experimental parameters are adjustable, allowing researchers to flexibly set conditions according to different research needs. Furthermore, it has data acquisition and analysis capabilities, effectively collecting and processing various data generated during experiments. Notably, safety measures are also a vital component of this apparatus, ensuring the entire experimental process is conducted safely and reliably.

[0003] The core furnace chamber of existing water-oxygen corrosion testing apparatuses mostly employs a tube furnace as the key location for conducting water-oxygen corrosion tests. The tube furnace has an inlet and an outlet, and its tubular cavity is used to hold the sample. While the design of the tube furnace chamber in existing water-oxygen corrosion testing technologies possesses a certain degree of rationality and sophistication, some shortcomings still remain.

[0004] In terms of system design, several coordinating components are equipped to ensure the smooth conduct of the water-oxygen corrosion test in the tubular furnace. The water-oxygen mixture generated by the steam generator is preheated by the preheater and then sent into the tubular furnace cavity through a detachable connecting pipe and sprayed onto the sample surface to initiate the test. In this process, some designs do indeed help the test, such as the adjustable flow water pump connected to the inlet, which can control the water volume to affect the mixture ratio; the heat tracing tape wrapped around the connecting pipe to ensure temperature stability; the temperature and pressure measuring devices installed in the tubular furnace and preheater to ensure the accuracy of the test conditions; and the use of replacement pipes of different sizes in conjunction with the detachable connecting pipe wrapped with insulation to optimize the furnace cavity test environment.

[0005] However, this technology still has the following problems:

[0006] First, testing complex structures or micro-components is challenging. In actual testing, due to design limitations of the tubular furnace cavity and related components, it is difficult for the water-oxygen mixture to uniformly contact all parts of the sample when dealing with specimens or micro-components with complex structures. This results in uneven corrosion and makes it difficult to accurately assess their overall resistance to water-oxygen corrosion.

[0007] Secondly, there are shortcomings in the treatment of waste gas and wastewater generated after water-oxygen corrosion. Existing technologies focus more on the material supply and furnace environment control during the experiment, but lack corresponding treatment measures for the waste gas and wastewater generated during the experiment. This will pollute the environment and does not meet environmental protection requirements.

[0008] Furthermore, the corrosion chamber cannot be used with external heating equipment. The heating function of the tubular furnace itself cannot meet the requirements in certain special test scenarios, and the current design does not take into account the compatibility issues with external heating equipment, which limits the expansion and diversification of test conditions.

[0009] Finally, the water-air ratio cannot be precisely controlled during water-oxygen corrosion. Although there are adjustable water pumps to control the water volume, in actual experiments, multiple factors interact, making it difficult to precisely control the water-air ratio. This affects the accuracy and repeatability of corrosion tests and is not conducive to the accurate assessment of material corrosion performance. Utility Model Content

[0010] In view of this, the present invention aims to propose a high-temperature water-oxygen corrosion cavity structure in order to solve some or all of the technical problems mentioned in the background art.

[0011] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0012] A high-temperature water-oxygen corrosion chamber structure includes a water-oxygen corrosion chamber, an alumina sealing plug, a steam delivery pipe, a high-pressure gas delivery pipe, a sealing flange, a flange end cap, and a water-oxygen corrosion support. The water-oxygen corrosion chamber is provided with a sealing flange at one end and an alumina sealing plug at the other end. The steam delivery pipe and the high-pressure gas delivery pipe are connected to the interior of the water-oxygen corrosion chamber through the alumina sealing plug. The sealing flange and the flange end cap are sealed together. The water-oxygen corrosion support is a long metal block with grooves of different inclination angles on its upper part. The water-oxygen corrosion support is placed inside the water-oxygen corrosion chamber.

[0013] Furthermore, the sealing flange and flange end cover are fixed on one side by a hinge, and locked on the other side by a wing nut-screw fastening latch structure. An end cover sealing ring is installed between the mating parts of the sealing flange and flange end cover. The hinge between the sealing flange and flange end cover, the wing nut-screw fastening latch structure, and the end cover sealing ring ensure the airtightness of the cavity, which is crucial for accurately controlling test conditions such as the water-air ratio within the cavity.

[0014] In a structure that optimizes the aforementioned scheme, the water-oxygen corrosion chamber is a cylindrical isostatically pressed alumina tube. The structure of the isostatically pressed alumina tube helps to distribute the water-oxygen mixture more evenly within the chamber. Its cylindrical structure reduces dead zones within the chamber, allowing the mixed gas to better contact the sample placed inside, including complex structures or small components, thereby initiating a more uniform corrosion reaction and facilitating accurate evaluation of the material's resistance to water-oxygen corrosion.

[0015] In a structure that optimizes the aforementioned scheme, the corundum sealing plug has a protruding hollow truncated cone interior. This protruding hollow truncated cone structure provides a specific mixing space for the high-pressure gas transported by the high-pressure gas delivery pipe and the water vapor transported by the water vapor delivery pipe. When the two gases enter this hollow structure, they no longer flow in simple parallel streams, but rather have the opportunity to contact and mix within a relatively enclosed space with a specific shape. The shape of the hollow cone guides the airflow direction of the incoming gas and water vapor, thereby promoting the intersection and collision of the two airflows, increasing their mixing probability and uniformity.

[0016] In a structure that optimizes the aforementioned solution, the sealing flange is either a double-ring sealing flange or a water-cooled flange. A double-ring sealing flange helps maintain stable pressure and temperature within the cavity. A stable pressure and temperature environment is crucial for accurately controlling the water-oxygen mixture, as temperature and pressure affect processes such as water evaporation and gas diffusion, thus influencing the water-to-gas ratio. For a water-cooled flange, the seals play a vital role during the operation of the high-temperature water-oxygen corrosion cavity structure, such as the sealing rings at the mating points between the sealing flange and other components. However, near the outlet, the continuous outflow of gas or liquid carries heat, resulting in a relatively high temperature in that area. This high-temperature environment accelerates the aging process of the sealing rubber and other materials, leading to decreased sealing performance and potential leaks, affecting the normal operation of the entire cavity structure and the accuracy of the test. A water-cooled flange, through a specific water-cooling circulation system, can specifically absorb heat at the outlet location. When high-temperature gas or liquid flows from the cavity outlet through the water-cooled flange, the cooling water in the water-cooled flange carries away the heat, thereby effectively reducing the temperature at the outlet and keeping it within a relatively suitable range. This greatly slows down the aging rate of the seals in this area due to high temperatures, ensuring that the seals can maintain good sealing performance for a long time.

[0017] In a structure that optimizes the aforementioned solution, the double-ring sealing flange includes a flange body and a flange retaining ring. A flange sealing ring is provided on each side of the flange retaining ring. The flange retaining ring and the flange sealing ring are fitted around the outside of the water-oxygen corrosion chamber. The flange body is fitted onto the flange retaining ring and the flange sealing ring and is fixed to the water-oxygen corrosion chamber.

[0018] In a structure that optimizes the aforementioned scheme, two sets of gas recovery ports are symmetrically arranged on both sides of the sealing flange.

[0019] In a structure that optimizes the aforementioned solution, a liquid recovery port is provided at the lower part of the sealing flange.

[0020] The gas and liquid recovery ports facilitate the recovery of waste gas and wastewater generated during the experiment, preventing direct discharge and environmental pollution, meeting environmental protection requirements, and effectively solving the problem of insufficient treatment measures for waste gas and wastewater in existing technologies. The recovered liquid can be returned to the system's water tank for recycling.

[0021] In a structure that optimizes the aforementioned scheme, the water-oxygen corrosion support has a row of downward-facing elongated protrusions at its lower part. In high-temperature water-oxygen corrosion testing environments, the high temperature can cause thermal expansion of the material, potentially leading to deformation of the support. The row of downward-facing elongated protrusions at the lower part of the water-oxygen corrosion support, through its own structure, increases the overall strength of the support to a certain extent. It acts like a reinforcing rib, bearing certain stresses at high temperatures, reducing the degree of deformation caused by thermal expansion or other factors, and ensuring that the support maintains a relatively stable shape under high-temperature conditions. This ensures that the position of the sample placed on it will not shift significantly due to support deformation, guaranteeing the accuracy of the test. Even during prolonged high-temperature testing, the support may experience slight deformation, but the elongated protrusions allow it to cooperate with the support body. When a part of the support undergoes slight deformation due to high temperature, the elongated protrusion can adjust and support the entire support by its contact relationship with the inner wall of the water-oxygen corrosion chamber and its connection structure with other parts of the support body. This ensures that the support remains stably placed in the water-oxygen corrosion chamber, guaranteeing that the sample remains in a relatively fixed and suitable position throughout the entire test. This facilitates the continuous and uniform contact of the mixed gas with various parts of the sample, enabling the corrosion test to be conducted normally and accurately.

[0022] In a structure that optimizes the aforementioned scheme, the water-oxygen corrosion support has at least four slots, with the slots having an inclination angle ranging from 25° to 30°. The different inclination angles of the slots allow the sample to be placed on the water-oxygen corrosion support in various orientations. Some samples, when placed horizontally, do not have sufficient contact with the mixed gas. However, by placing them in slots with a certain inclination angle, their surfaces can face the flow direction of the mixed gas at different angles, allowing the mixed gas to more comprehensively cover all surfaces of the sample, effectively increasing the contact area between the sample and the mixed gas. Furthermore, different inclination angles create diverse contact methods. For samples with complex shapes, slots at different angles allow protrusions, depressions, and other parts of the sample to fully contact the mixed gas at appropriate angles, avoiding situations where some parts cannot effectively participate in the corrosion reaction due to a single placement angle. This is more conducive to accurately evaluating the overall water-oxygen corrosion resistance of the sample. The presence of multiple slots provides rich placement options. When conducting tests on multiple sets of samples, different samples can be flexibly placed in slots at different positions according to their size, shape, and other characteristics, achieving arbitrary combination placement. For example, for a set of small component samples of different sizes, the smaller components can be placed in a slot with a smaller tilt angle and a relatively narrower slot, so that they can be placed stably and fully contact the gas mixture; while the larger components can be placed in a slot with a slightly larger tilt angle and a wider space. This can make full use of the space of the support, while ensuring that each sample can be subjected to corrosion test under suitable conditions, thus improving the flexibility and efficiency of the test.

[0023] In a structure that optimizes the aforementioned scheme, two sets of refractory rings are further included, each positioned at one end of the water-oxygen corrosion chamber. The refractory rings play a crucial role in the entire structure, interacting with external refractory materials when needed for integration with external heating equipment. Because the refractory rings are located at the ends of the water-oxygen corrosion chamber, they, together with the externally added refractory materials, enclose a relatively independent heating chamber near the outside of the chamber. This heating chamber provides a suitable space for external heating elements. For example, in some special experimental scenarios, when higher temperatures or more complex temperature gradients are required, external heating elements such as heating wires or heating rods can be placed within this heating chamber composed of the refractory rings and the external refractory materials. This structure allows heat to be more concentrated around the water-oxygen corrosion chamber, improving heating efficiency and enabling better control of the direction and range of heat transfer. Furthermore, the refractory rings effectively prevent excessive heat loss. Effective heat utilization is crucial during high-temperature testing. The heat-insulating properties of the refractory ring reduce heat diffusion to the surrounding environment, allowing more heat to be used for sample testing within the water-oxygen corrosion chamber. This ensures the high-temperature environment required for the experiment and improves energy efficiency. On the other hand, the refractory ring protects the chamber structure. External heating elements generate high temperatures during operation; if they directly contact the water-oxygen corrosion chamber, they can damage the chamber due to localized overheating. The refractory ring can withstand high temperatures and evenly transfer heat to the chamber, preventing localized overheating and ensuring safe and stable operation even under external heating. This further expands the diversity of experimental conditions and meets the temperature requirements of different tests.

[0024] Compared with the prior art, the high-temperature water-oxygen corrosion chamber structure of this utility model has the following advantages:

[0025] 1. The water-oxygen corrosion chamber adopts a cylindrical isostatically pressed corundum tube structure, reducing dead angles within the chamber and allowing the water-oxygen mixture to better contact the sample, including complex structures or micro-components. This enables a more uniform initiation of the corrosion reaction, facilitating accurate assessment of the material's resistance to water-oxygen corrosion. The water-oxygen corrosion support features at least four grooves with an inclination angle of 25°-30°, increasing the contact area between the sample and the mixture and providing diverse contact methods. It also allows for flexible combination and placement of multiple samples, further improving the accuracy of testing samples of different shapes and sizes.

[0026] 2. The sealing flange and flange end cap, through a special structure and end cap sealing ring, ensure the cavity's sealing performance. The double-ring sealing flange helps maintain stable pressure and temperature within the cavity, while the water-cooled flange reduces the outlet temperature, ensuring seal performance. These measures create favorable conditions for precise control of the water-oxygen mixture. The hollow frustum structure of the corundum sealing plug promotes uniform mixing of gas and water vapor, improving the difficulty in precisely controlling the water-gas ratio, enhancing the accuracy and repeatability of the test, and helping to more accurately assess the material's corrosion performance.

[0027] 3. Gas recovery ports are set on both sides of the sealing flange and liquid recovery port is set at the bottom, which can facilitate the recovery of waste gas and wastewater generated during the test. The recovered liquid can also be recycled, avoiding environmental pollution and meeting environmental protection requirements. This effectively solves the problem of lack of treatment measures for waste gas and wastewater in the existing technology.

[0028] 4. The refractory ring, in conjunction with the external refractory material, forms a heating chamber at the end of the water-oxygen corrosion chamber, providing space for external heating elements. This not only improves heating efficiency and controls the direction and range of heat transfer, but also effectively prevents heat loss, protects the chamber structure, avoids localized overheating, and allows the chamber to adapt to external heating equipment. This ensures the internal temperature of the chamber remains stable above 1600℃ for extended periods, expanding the experimental temperature range and meeting the temperature requirements of more specialized experimental scenarios.

[0029] 5. The elongated protrusion at the bottom of the water-oxygen corrosion support enhances its strength at high temperatures and reduces deformation caused by thermal expansion and other factors. Even with slight deformation during prolonged high-temperature testing, it maintains stable placement, ensuring the sample position is fixed and allowing the mixed gas to continuously and uniformly contact the sample, guaranteeing that the test can be conducted normally and accurately under various conditions. Attached Figure Description

[0030] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0031] Figure 1 This is a schematic diagram of the high-temperature water-oxygen corrosion chamber structure described in this utility model;

[0032] Figure 2 This is a vertical cross-sectional schematic diagram of the high-temperature water-oxygen corrosion chamber structure described in this utility model;

[0033] Figure 3 This is a schematic horizontal cross-sectional view of the high-temperature water-oxygen corrosion chamber structure described in this utility model;

[0034] Figure 4 This is a schematic diagram of the water-oxygen corrosion support structure described in this utility model.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Water-oxygen corrosion chamber; 2. Corundum sealing plug; 3. Steam delivery pipe; 4. High-pressure gas delivery pipe; 5. Sealing flange; 51. Flange body; 52. Flange retaining ring; 6. Flange end cover; 7. Water-oxygen corrosion support; 71. Groove; 72. Long protrusion; 8. Gas recovery port; 9. Liquid recovery port; 10. End cover sealing ring; 11. Flange sealing ring; 12. Fire-resistant ring. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0038] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] 1. Equipment Structure

[0042] The high-temperature water-oxygen corrosion chamber structure is mainly composed of water-oxygen corrosion chamber 1, corundum sealing plug 2, water vapor conveying pipe 3, high-pressure gas conveying pipe 4, sealing flange 5, flange end cover 6, water-oxygen corrosion support 7, etc.

[0043] The water-oxygen corrosion chamber 1 is a cylindrical isostatically pressed corundum tube. This structural design helps to distribute the water-oxygen mixture more evenly within the chamber. Its cylindrical shape reduces dead zones within the chamber, allowing the mixed gas to better contact the sample placed inside, including complex structures or small components, thereby initiating a more uniform corrosion reaction. Simultaneously, corundum material possesses high-temperature resistance, enabling it to withstand water-oxygen corrosion tests in high-temperature environments, which is one of the fundamental aspects of achieving "high-temperature" testing.

[0044] A sealing flange 5 is installed at one end of the water-oxygen corrosion chamber 1, and an alumina sealing plug 2 is installed at the other end. The water vapor delivery pipe 3 and the high-pressure gas delivery pipe 4 are connected to the interior of the water-oxygen corrosion chamber 1 through the alumina sealing plug 2. The interior of the alumina sealing plug 2 is a protruding hollow cone, which provides a specific mixing space for the high-pressure gas delivered by the high-pressure gas delivery pipe 4 and the water vapor delivered by the water vapor delivery pipe 3, which is conducive to uniform gas mixing.

[0045] The sealing flange 5 and the flange end cover 6 are sealed together. One side of the two is fixed by a hinge, and the other side is locked by a wing nut-screw fastening mechanism. An end cover sealing ring 10 is provided between the mating parts of the sealing flange 5 and the flange end cover 6 to ensure the sealing of the cavity. The sealing flange 5 can be either a double-ring sealing flange or a water-cooled flange. The double-ring sealing flange includes a flange sleeve 51 and a flange retaining ring 52. A flange sealing ring 11 is provided on each side of the flange retaining ring 52. The flange retaining ring 52 and the flange sealing ring 11 are fitted over the outside of the water-oxygen corrosion cavity 1. The flange sleeve 51 is fastened onto the flange retaining ring 52 and the flange sealing ring 11 and fixed to the water-oxygen corrosion cavity 1. This double-ring sealing flange helps to maintain stable pressure and temperature within the cavity, ensuring precise control of the water-oxygen mixing state under high-temperature conditions. Water-cooled flanges, through a specific water-cooling circulation system, can specifically absorb heat at the outlet location. During the operation of the high-temperature water-oxygen corrosion chamber structure, the temperature at the outlet location can be effectively reduced, the aging rate of the seals can be slowed down, and the sealing performance can be ensured, thereby guaranteeing the normal conduct of high-temperature tests.

[0046] Two sets of gas recovery ports 8 are symmetrically arranged on both sides of the sealing flange 5, and a liquid recovery port 9 is located at the bottom, facilitating the recovery of waste gas and wastewater generated during the experiment. The design of the gas recovery ports 8 and liquid recovery ports 9 avoids direct discharge of waste gas and wastewater, thus preventing environmental pollution and meeting environmental protection requirements. The recovered liquid can be transported back to the system's water tank for recycling.

[0047] The water-oxygen corrosion support 7 is a long metal block with at least four grooves 71 at inclination angles ranging from 25° to 30° on its upper part and a row of downward-facing elongated protrusions 72 on its lower part. The different inclination angles of the grooves 71 allow the sample to be placed on the water-oxygen corrosion support in various orientations, increasing the contact area and diversifying the contact methods between the sample and the gas mixture, which is beneficial for accurately evaluating the overall water-oxygen corrosion resistance of the sample. Multiple grooves 71 also allow for flexible combination and placement of multiple samples, improving the flexibility and efficiency of the test. The elongated protrusions 72 increase the overall strength of the support at high temperatures, reducing the degree of deformation caused by thermal expansion or other factors. Even if the support undergoes slight deformation during prolonged high-temperature testing, the elongated protrusions 72 can still adjust and support the support as a whole, ensuring the sample position remains relatively fixed and that the gas mixture continuously and uniformly contacts the sample, guaranteeing the normal and accurate conduct of the test under high-temperature conditions.

[0048] In addition, two sets of refractory rings 12 are included, respectively disposed at the ends of the water-oxygen corrosion chamber 1. When used in conjunction with external heating equipment, the refractory rings 12 can cooperate with the external refractory material to form a relatively independent heating chamber near the outside of the water-oxygen corrosion chamber 1. This heating chamber provides suitable space for the placement of external heating elements, such as heating wires and heating rods. The refractory rings 12 can effectively prevent excessive heat loss, reduce heat diffusion to the surrounding environment, ensure the high-temperature environment required for the experiment, and improve energy utilization efficiency. Moreover, the refractory rings 12 can withstand high temperatures and evenly transfer heat to the chamber, avoiding local overheating, protecting the chamber structure, and ensuring that the temperature inside the chamber can be kept stable above 1600℃ for a long period of time. This fully demonstrates that this structure can meet the requirements of high-temperature testing.

[0049] 2. Equipment operation process

[0050] When conducting a high-temperature water-oxygen corrosion test, the sample is first placed in the groove 71 of the water-oxygen corrosion support 7. Based on the size, shape, and other characteristics of the sample, a groove 71 with an appropriate tilt angle and size is selected to ensure that the sample can be placed stably and can fully contact the water-oxygen mixture.

[0051] Then, water vapor and high-pressure gas are respectively supplied to the water-oxygen corrosion chamber 1 through the water vapor supply pipe 3 and the high-pressure gas supply pipe 4. The water vapor is generated by a water vapor generator, and after preheating, it enters the hollow frustum structure inside the corundum sealing plug 2 through the supply pipe 3. The high-pressure gas also enters the hollow frustum structure at the same time. Inside the hollow frustum, the two gases cross, collide and mix thoroughly to form a uniform water-oxygen mixture, which then enters the water-oxygen corrosion chamber 1.

[0052] After the mixed gas enters the water-oxygen corrosion chamber 1, due to the cylindrical isostatic corrosive alumina tube structure of chamber 1, the mixed gas can be evenly distributed within the chamber, better contacting all parts of the sample, including complex structures or micro-components, thus initiating a uniform corrosion reaction. During this process, the sealing structure of the sealing flange 5 and the flange end cap 6 ensures the airtightness of the chamber. If a double-ring sealing flange is used, it maintains stable pressure and temperature within the chamber; if a water-cooled flange is used, it controls the temperature at the outlet position, ensuring good sealing performance and providing conditions for precise control of the water-oxygen mixing state.

[0053] During the experiment, waste gas and wastewater are generated as the water-oxygen corrosion reaction proceeds. The waste gas is recovered through the gas recovery ports 8 on both sides of the sealing flange 5, while the wastewater is recovered through the liquid recovery port 9 at the bottom of the sealing flange 5. The recovered liquid can be returned to the system water tank for recycling, thus avoiding environmental pollution.

[0054] When higher temperatures or special temperature conditions are required, external heating elements, such as heating wires or heating rods, are placed inside the heating chamber formed by the refractory ring 12 at the end of the water-oxygen corrosion chamber 1 and the external refractory material to heat the chamber 1. The heat insulation performance of the refractory ring 12 prevents heat loss, and combined with external insulation measures, heat is evenly transferred to the chamber, avoiding local overheating and ensuring that the temperature inside the chamber remains stable at a high temperature for a long period, meeting the requirements of high-temperature water-oxygen corrosion tests. Throughout the test, the elongated protrusion 72 at the bottom of the water-oxygen corrosion support 7 ensures the stability of the support at high temperatures, maintains the fixed position of the sample, and ensures that the mixed gas can continuously and evenly contact the sample, guaranteeing the accuracy of the test.

[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-temperature water-oxygen corrosion cavity structure, characterized in that: The system includes a water-oxygen corrosion chamber (1), a corundum sealing plug (2), a steam delivery pipe (3), a high-pressure gas delivery pipe (4), a sealing flange (5), a flange end cap (6), and a water-oxygen corrosion support (7). The water-oxygen corrosion chamber (1) is equipped with a sealing flange (5) at one end and a corundum sealing plug (2) at the other end. The steam delivery pipe (3) and the high-pressure gas delivery pipe (4) are connected to the interior of the water-oxygen corrosion chamber (1) through the corundum sealing plug (2). The sealing flange (5) and the flange end cap (6) are sealed together. The water-oxygen corrosion support (7) is a long metal block with grooves (71) at different inclination angles on its upper part. The water-oxygen corrosion support (7) is placed inside the water-oxygen corrosion chamber (1).

2. The high-temperature water-oxygen corrosion cavity structure according to claim 1, characterized in that: The water-oxygen corrosion chamber (1) is a cylindrical isostatic corundum tube.

3. The high-temperature water-oxygen corrosion cavity structure according to claim 1, characterized in that: The corundum sealing plug (2) has a protruding hollow cone inside.

4. The high-temperature water-oxygen corrosion cavity structure according to claim 1, characterized in that: The sealing flange (5) is either a double-ring sealing flange or a water-cooled flange.

5. The high-temperature water-oxygen corrosion cavity structure according to claim 4, characterized in that: The double-ring sealing flange includes a flange body (51) and a flange retaining ring (52). A flange sealing ring (11) is provided on each side of the flange retaining ring (52). The flange retaining ring (52) and the flange sealing ring (11) are fitted outside the water-oxygen corrosion chamber (1). The flange body (51) is fitted onto the flange retaining ring (52) and the flange sealing ring (11) and fixed to the water-oxygen corrosion chamber (1).

6. The high-temperature water-oxygen corrosion cavity structure according to claim 1, characterized in that: Two sets of gas recovery ports (8) are symmetrically arranged on both sides of the sealing flange (5).

7. The high-temperature water-oxygen corrosion cavity structure according to claim 1, characterized in that: A liquid recovery port (9) is provided at the lower part of the sealing flange (5).

8. The high-temperature water-oxygen corrosion cavity structure according to claim 1, characterized in that: The water-oxygen corrosion support (7) has a row of downward-facing elongated protrusions (72) at its lower part.

9. The high-temperature water-oxygen corrosion cavity structure according to claim 1, characterized in that: The water-oxygen corrosion support (7) has no fewer than four grooves (71), and the inclination angle of the grooves (71) ranges from 25° to 30°.

10. The high-temperature water-oxygen corrosion cavity structure according to claim 1, characterized in that: It also includes a fire-resistant ring (12), which consists of two sets and is respectively disposed at the ends of the water-oxygen corrosion chamber (1).

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