High-temperature corrosion device under multi-condition corrosion atmosphere

Abstract

The invention provides a high-temperature corrosion device under a multi-condition corrosion atmosphere, which comprises a support frame, a high-temperature environment box, a corrosion medium storage chamber, a gas compression device and a mixing preheating furnace, the high-temperature environment box is used for containing a sample and providing different corrosion atmospheres for the sample; different corrosive media are stored in the corrosive medium storage chamber; the gas compression device is respectively connected with the high-temperature environment box and the mixing preheating furnace, and is used for conveying compressed gas into the high-temperature environment box or the mixing preheating furnace, so that the corrosive medium in the high-temperature environment box or the mixing preheating furnace is atomized; the mixing preheating furnace is used for atomizing and preheating the gas-liquid corrosion medium to be mixed and uniformly mixing different types of gas-liquid corrosion mediums; deionized water or liquid mixed with a corrosion medium is atomized and uniformly mixed by means of high-pressure airflow formed by compressed air and then blown into a furnace chamber, and a high-temperature corrosion environment with stable and adjustable flow speed and corrosion medium concentration is created.

Description

Technical Field

[0001] The invention relates to the technical field of high temperature corrosion devices, and in particular to a high temperature corrosion device under a multi-condition corrosion atmosphere. Background Art

[0002] High temperature corrosion refers to the process in which oxygen, sulfur, carbon, nitrogen and other elements in the environment react with metal components under high temperature, causing the components to deteriorate or be destroyed. Compared with a single thermal exposure study, the addition of corrosive media in high temperature corrosion research accelerates the oxidation process of components, accelerates damage accumulation and performance degradation of components, and is closer to the actual service environment of components. Building a high temperature corrosion environment can simulate the corrosion process of metals in a high temperature corrosion environment and explore the high temperature corrosion mechanism and performance degradation mechanism of alloys.

[0003] The main high-temperature corrosion environments include salt spray, oil and gas, and water and oxygen. High-temperature oil and gas corrosion takes a long time. Generally, components that have failed due to corrosion during service are directly selected for analysis and research. A high-temperature oil and gas corrosion environment can also be built by blowing oil fume exhaust gas. High-temperature water and oxygen corrosion is to blow water and oxygen gas mixed in a certain proportion into the environmental chamber to build a high-temperature water and oxygen corrosion environment. High-temperature salt spray corrosion uses salt coating method or molten salt gas blowing method to build a corrosion environment. The salt coating method is to conduct a high-temperature corrosion experiment after uniformly depositing a mixed salt of a specific proportion on the surface of the alloy. It cannot simulate the rapid flow of high-temperature gas in certain service environments of components; the molten salt gas blowing method uses flowing gas to blow the salt vapor above the molten salt to the alloy surface to achieve high-temperature corrosion, but it is only applicable to high-temperature corrosion experiments with temperatures higher than the melting point of the mixed salt. It is difficult to quantitatively analyze the influence of salt deposition on the high-temperature corrosion behavior of components; the salt coating method and the molten salt gas blowing method are both carried out separately in a simulated high-temperature corrosion environment. Summary of the invention

[0004] In view of the above technical problems, the present invention proposes a high-temperature corrosion device under a multi-condition corrosive atmosphere, which uses the high-pressure airflow formed by compressed air to atomize deionized water or a liquid mixed with a corrosive medium and evenly mix it before blowing it into the furnace chamber to create a high-temperature corrosion environment with a stable and adjustable flow rate and concentration of the corrosive medium. The salt spray environment, oil and gas environment, and water and oxygen environment can be concentrated on one device, sharing one environmental chamber, and different corrosive media can be pre-mixed and then introduced into the high-temperature corrosion chamber, and then operated by a numerical control device, so that high-temperature corrosion experiments in a single or two mixed corrosive environments can be carried out respectively.

[0005] Specifically, the present invention provides a high temperature corrosion device under a multi-condition corrosion atmosphere, comprising: a support frame, a high temperature environment box, a corrosion medium storage chamber, a gas compression device, a mixed preheating furnace and a control device, wherein the high temperature environment box, the corrosion medium storage chamber, the gas compression device, the mixed preheating furnace and the control device are all installed on the support frame, wherein: The high temperature environment box is used to contain samples and provide different corrosive atmospheres for the samples; The corrosive medium storage chamber stores different corrosive media, and the corrosive media therein can be pumped into the high-temperature environment box or the mixed preheating furnace; The gas compression device is connected to the high temperature environment box and the mixed preheating furnace respectively, and is used to deliver compressed gas to the high temperature environment box or the mixed preheating furnace, so as to atomize the corrosive medium in the high temperature environment box or the mixed preheating furnace; The mixing preheating furnace is connected to the corrosive medium storage chamber, the high temperature environment box and the gas compression device respectively, and is used to atomize and preheat the gas-liquid corrosive medium to be mixed, and to achieve uniform mixing between different types of gas-liquid corrosive media; The control device is used to respectively adjust the delivery flow of compressed gas and corrosive medium, the preheating temperature of the mixed preheating furnace, and the corrosive atmosphere temperature of the high-temperature environment box.

[0006] As a further illustration of the present invention, the corrosive medium storage chamber comprises a first corrosive medium storage chamber for containing deionized water, a second corrosive medium storage chamber for containing salt solution, and a third corrosive medium storage chamber for containing kerosene.

[0007] As a further illustration of the present invention, the high-temperature corrosion device also includes a first peristaltic pump, a second peristaltic pump and a third peristaltic pump. The first peristaltic pump is used to pump the deionized water in the first corrosive medium storage chamber into the mixing preheating furnace, the second peristaltic pump is used to pump the salt solution in the second corrosive medium storage chamber into the high-temperature environment box, and the third peristaltic pump is used to pump the kerosene in the third corrosive medium storage chamber into the mixing preheating furnace.

[0008] As a further illustration of the present invention, a first partition and a second partition in a T-shaped distribution are arranged in the furnace chamber of the mixed preheating furnace, so as to divide the furnace chamber of the mixed preheating furnace into a mixing chamber, a second sub-chamber and a first sub-chamber, a double helix flow channel is arranged from top to bottom in the first partition, the upper ends of the two flow channels of the double helix flow channel are respectively connected to the first liquid inlet pipe and the second liquid inlet pipe, one of the flow channels of the double helix flow channel is respectively connected to the mixing pipe and the first air guide pipe at the lower end, the other flow channel is respectively connected to the mixing pipe and the second air guide pipe at the lower end, the other end of the first liquid inlet pipe is connected to the first corrosive medium storage chamber, and the second inlet pipe is connected to the first corrosive medium storage chamber. The other end of the liquid pipe is connected to the third corrosive medium storage chamber. Solenoid valves are installed on the mixing tube, the first air pipe and the second air pipe. The mixing tube is connected to the mixing chamber, the first air pipe is connected to the first sub-chamber, and the second air pipe is connected to the second sub-chamber. The first liquid inlet pipe and the second liquid inlet pipe are connected with an inlet pipe for connecting to a gas compression device. The upper end of the mixing chamber is connected to a third outlet pipe for conveying mixed corrosive gas to the high-temperature environment box. The upper ends of the first sub-chamber and the second sub-chamber are respectively connected to the first outlet pipe and the second outlet pipe for conveying a single corrosive gas to the high-temperature environment box.

[0009] As a further explanation of the present invention, the inner wall of the mixing chamber is connected to a plurality of inclined third partitions from top to bottom, the third partitions divide the mixing chamber into a plurality of mixing sub-chambers, one end of the third partition is provided with a plurality of air holes, the positions of the air holes on the two upper and lower adjacent third partitions are staggered, the mixing tube is located in the mixing sub-chamber at the lower end, and a plurality of spoilers are provided on the top and bottom surfaces of the third partition, and the upper and lower spoilers in a single mixing sub-chamber are staggered.

[0010] As a further explanation of the present invention, the gas compression device includes an air compressor and an oxygen cylinder. The air compressor is used to deliver high-pressure air to the mixed preheating furnace and the high-temperature environment box, and the oxygen cylinder is used to deliver high-pressure oxygen to the mixed preheating furnace.

[0011] As a further explanation of the present invention, the high-temperature corrosion device also includes a gas flow meter, which is used to detect the flow of gas delivered to the mixed preheating furnace and the high-temperature environment box, and transmit the detection signal to the control device. The control device adjusts the flow rate of the incoming gas according to the detection value of the gas flow meter.

[0012] As a further explanation of the present invention, a plurality of atomizing nozzles are arranged in the furnace cavity of the high temperature environment box, and the atomizing nozzles are connected to the liquid delivery pipeline and the gas delivery pipeline connected to the high temperature environment box, so that the corrosive medium in the furnace cavity sent into the high temperature environment box is evenly atomized and then sprayed into the furnace cavity.

[0013] As a further explanation of the present invention, the outside of the furnace cavity of the high-temperature environment box and the mixed preheating furnace are sequentially provided with heating resistance wires, aluminum silicate plates, insulation cotton and metal shells from the inside to the outside, the heating resistance wires are connected to the heating temperature control module, the heating temperature control module is connected to the control device, and the furnace cavity of the high-temperature environment box and the mixed preheating furnace is also provided with a temperature sensor, the temperature sensor is used to detect the temperature in the furnace cavity of the high-temperature environment box and the mixed preheating furnace, and transmit the signal to the control device, and the control device can adjust the temperature in the furnace cavity of the high-temperature environment box and the mixed preheating furnace by controlling the heating temperature control module according to the temperature detected by the temperature sensor.

[0014] As a further illustration of the present invention, a placement plate for placing samples is provided in the furnace chamber of the high temperature environment box, and a sealed door is also provided on the high temperature environment box, and an insulation screen is provided inside the sealed door.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention proposes a high-temperature corrosion device under a multi-condition corrosion atmosphere, which uses a high-pressure airflow formed by compressed air to atomize deionized water or a liquid mixed with a corrosive medium, mixes it evenly, and then blows it into the furnace chamber to create a high-temperature corrosion environment with a stable and adjustable flow rate and concentration of the corrosive medium. The corrosion environments such as salt spray environment, oil and gas environment, water and oxygen environment can be concentrated on one device, share one environmental chamber, and different corrosive media can be pre-mixed evenly before being introduced into the high-temperature corrosion chamber, and then operated by a numerical control device, and high-temperature corrosion experiments of a single or two mixed corrosion environments can be carried out respectively.

[0016] Other features and advantages of the technical solution will be described in the subsequent description, and partly become apparent from the description, or understood by implementing the technical solution. The purpose and other advantages of the technical solution can be achieved and obtained through the structures specifically pointed out in the written description and the drawings.

[0017] The technical solution of the present technical solution is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the technical solution and constitute a part of the specification. Together with the embodiments of the technical solution, they are used to explain the technical solution and do not constitute a limitation of the technical solution. In the accompanying drawings: Figure 1 This is an overall structural diagram of the high-temperature corrosion device under multi-condition corrosion atmosphere provided by the present invention.

[0019] Figure 2This is a schematic diagram of the partial structure of a high-temperature etching device under a multi-condition corrosion atmosphere provided by the present invention.

[0020] Figure 3 Another partial structural schematic diagram of the high temperature etching device under the multi-condition corrosion atmosphere provided by the present invention.

[0021] Figure 4 It is a schematic diagram of the corrosion structure of the mixed preheating furnace in the present invention.

[0022] Figure 5 Schematic diagram of the internal structure of the mixing chamber in the present invention.

[0023] Figure 6 It is a schematic diagram of the internal structure of the first sub-chamber and the second sub-chamber in the present invention.

[0024] Figure 7 It is a schematic diagram of the internal structure of the first partition in the present invention.

[0025] Description of reference numerals: 1. First corrosive medium storage chamber, 2. Second corrosive medium storage chamber, 3. Third corrosive medium storage chamber, 4. Heating and temperature control module, 5. Sealed door, 6. High temperature environment box, 7. First peristaltic pump, 8. Second peristaltic pump, 9. Third peristaltic pump, 10. Atomizing nozzle, 11. Tail gas condensing device, 12. Control device, 13. Scrubber, 14. Mixing preheating furnace, 15. First air guide pipe, 16. Gas flow meter, 17. Support frame , 18. second partition, 19. first liquid inlet pipe, 20. second liquid inlet pipe, 21. air hole, 22. third partition, 23. mixing tube, 24. spoiler, 25. storage plate, 26. insulation screen, 27. mixing chamber, 28. first partition, 29. second air guide pipe, 30. double helix flow channel, 31. second sub-chamber, 32. first sub-chamber, 33. air inlet pipe, 34. first air outlet pipe, 35. second air outlet pipe, 36. third air outlet pipe. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present technical solution are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present technical solution, and are not used to limit the present technical solution.

[0027] like Figure 1-7As shown, the present invention provides a high-temperature corrosion device under a multi-condition corrosion atmosphere, including a support frame 17, a high-temperature environment box 6, a corrosion medium storage chamber, a gas compression device, a mixed preheating furnace 14 and a control device 12, wherein the high-temperature environment box 6, the corrosion medium storage chamber, the gas compression device, the mixed preheating furnace 14 and the control device 12 are all installed on the support frame 17, wherein: the high-temperature environment box 6 is used to contain samples and provide different corrosion atmospheres for the samples; different corrosion media are stored in the corrosion medium storage chamber, and the corrosion media therein can be pumped into the high-temperature environment box 6 or the mixed preheating furnace 14; the gas compression device The compression device is respectively connected to the high-temperature environment box 6 and the mixing preheating furnace 14, and is used to transport compressed gas to the high-temperature environment box 6 or the mixing preheating furnace 14, so as to atomize the corrosive medium in the high-temperature environment box 6 or the mixing preheating furnace 14; the mixing preheating furnace 14 is respectively connected to the corrosive medium storage chamber, the high-temperature environment box 6 and the gas compression device, and is used to atomize and preheat the gas-liquid corrosive medium to be mixed, and to achieve uniform mixing between different types of gas-liquid corrosive media; the control device 12 is respectively used to adjust the transport flow rate of compressed gas and corrosive medium, the preheating temperature of the mixing preheating furnace 14, and the corrosive atmosphere temperature of the high-temperature environment box 6.

[0028] The present invention proposes a high-temperature corrosion device under a multi-condition corrosion atmosphere, which uses a high-pressure airflow formed by compressed air to atomize deionized water or a liquid mixed with a corrosive medium, mixes it evenly, and then blows it into the furnace chamber to create a high-temperature corrosion environment with a stable and adjustable flow rate and concentration of the corrosive medium. The corrosion environments such as salt spray environment, oil and gas environment, water and oxygen environment can be concentrated on one device, share one environmental chamber, and different corrosive media can be pre-mixed evenly before being introduced into the high-temperature corrosion chamber, and then operated by a numerical control device, and high-temperature corrosion experiments of a single or two mixed corrosion environments can be carried out respectively.

[0029] In one feasible manner, a corrosive medium storage chamber can be installed at the lower layer of the metal frame 17. The corrosive medium storage chamber can be used to store experimental corrosive media, such as kerosene, mixed salt solution, deionized water, etc. For example, the corrosive medium storage chamber can include a first corrosive medium storage chamber 1 for containing deionized water, a second corrosive medium storage chamber 2 for containing salt solution, and a third corrosive medium storage chamber 3 for containing kerosene.

[0030] In one feasible manner, the high-temperature corrosion device also includes a high-precision peristaltic pump, which can be fixedly mounted on a metal frame 17. The control device 12 is connected to the high-precision peristaltic pump, and the control device 12 can control the high-precision peristaltic pump to adjust the flow rate and flow rate of the corrosive medium input; illustratively, the high-precision peristaltic pump specifically includes a first peristaltic pump 7, a second peristaltic pump 8 and a third peristaltic pump 9. The first peristaltic pump 7 is used to pump the deionized water in the first corrosive medium storage chamber 1 into the mixing preheating furnace 14, the second peristaltic pump 8 is used to pump the salt solution in the second corrosive medium storage chamber 2 into the high-temperature environment box 6, and the third peristaltic pump 9 is used to pump the kerosene in the third corrosive medium storage chamber 3 into the mixing preheating furnace 14.

[0031] In one practicable manner, a first partition 28 and a second partition 18 are arranged in a T-shaped distribution in the furnace chamber of the mixing preheating furnace 14, so as to divide the furnace chamber of the mixing preheating furnace 14 into a mixing chamber 27, a second sub-chamber 31 and a first sub-chamber 32. A double helix flow channel 30 is arranged from top to bottom in the first partition 28. The upper ends of the two flow channels of the double helix flow channel 30 are respectively connected to the first liquid inlet pipe 19 and the second liquid inlet pipe 20. The lower end of one of the flow channels of the double helix flow channel 30 is respectively connected to the mixing pipe 23 and the first air guide pipe 15, and the lower end of the other flow channel is respectively connected to the mixing pipe 23 and the second air guide pipe 29. The other end of the first liquid inlet pipe 19 is connected to the first corrosive medium storage chamber 1, and the second inlet pipe 20 is respectively connected to the first corrosive medium storage chamber 1. The other end of the liquid pipe 20 is connected to the third corrosive medium storage chamber 3. Solenoid valves are installed on the mixing tube 23, the first air pipe 15 and the second air pipe 29. The mixing tube 23 is connected to the mixing chamber 27, the first air pipe 15 is connected to the first sub-chamber 32, the second air pipe 29 is connected to the second sub-chamber 31, and the first liquid inlet pipe 19 and the second liquid inlet pipe 20 are connected to an inlet pipe 33 for connecting to a gas compression device. The upper end of the mixing chamber 27 is connected to a third outlet pipe 36 for conveying a mixed corrosive gas to the high-temperature environment box 6, and the upper ends of the first sub-chamber 32 and the second sub-chamber 31 are respectively connected to a first outlet pipe 34 and a second outlet pipe 35 for conveying a single corrosive gas to the high-temperature environment box 6.

[0032] The furnace chamber of the mixed preheating furnace 14 is divided into a mixing chamber 27, a second sub-chamber 31 and a first sub-chamber 32, so that different corrosive media can be independently preheated and independently introduced into the high-temperature environment box 6 without affecting each other. The mixing chamber 27 is used for uniform mixing of two different corrosive media, and the second sub-chamber 31 and the first sub-chamber 32 are used to separately contain different atomized or vaporized corrosive media. The three chambers are independent of each other and do not affect each other.

[0033] A double helix flow channel 30 is arranged from top to bottom in the first partition plate 28, which can facilitate the introduction of different liquid corrosive media, and the spiral depth of the flow channel can improve the preheating efficiency of different corrosive media in the furnace chamber while improving the uniform mixing effect between the corrosive liquid and the compressed gas (the corrosive liquid is introduced through the first liquid inlet pipe 19 and the second liquid inlet pipe 20, respectively, and the high-pressure gas is introduced through the air inlet pipe 33), so that the corrosive medium can achieve the effect of sufficient preheating and uniform atomization in the flow channel, so that the corrosive medium discharged from the double helix flow channel 30 is in a completely atomized or gasified state. The corrosive medium discharged from the double helix flow channel 30 can be introduced into the mixing chamber 27 through the mixing pipe 23, and can also enter the first sub-chamber 32 and the second sub-chamber 31 through the first air guide pipe 15 and the second air guide pipe 29 respectively.

[0034] In one feasible manner, the inner wall of the mixing chamber 27 is connected from top to bottom with multiple inclined third partitions 22, the third partitions 22 divide the mixing chamber 27 into multiple mixing sub-chambers, one end of the third partition 22 is provided with multiple air holes 21, the air holes 21 on the two upper and lower adjacent third partitions 22 are staggered, the mixing tube 23 is located in the mixing sub-chamber at the lower end, and multiple spoilers 24 are provided on the top and bottom surfaces of the third partition 22, and the upper and lower spoilers 24 in a single mixing sub-chamber are staggered.

[0035] During the experiment, the temperature inside the mixed preheating furnace 14 can be adjusted by the control device 12, and the compressed gas and the corrosive medium can be mixed evenly and preheated, thereby reducing the influence of water, oxygen or oil and gas input on the temperature stability in the high-temperature environment box 6. When conducting experiments in a mixed corrosive environment, water, oxygen and oil and gas can also be mixed evenly and preheated in advance to improve the uniformity and stability of the corrosive atmosphere in the furnace. Specifically, when it is necessary to introduce a uniformly mixed corrosive medium (such as a mixed corrosive medium of water, oxygen and oil gas) into the high temperature environment box 6, the solenoid valves on the first air guide pipe 15 and the second air guide pipe 29 can be closed, so that the two corrosive media are introduced into the mixing chamber 27 through the mixing pipe 23. Due to the presence of the third partition plate 22 and the staggered air holes 21 thereon, the two different gas mixtures gradually flow upward in the mixing chamber 27 and are discharged from the air holes 21 at different positions, thereby increasing the mixing path of the gas, so that the corrosive gases with different flow rates constantly meet, thereby achieving the purpose of preliminary mixing. Since the third partition plate 22 is inclined, the upward flow distance of the gas in a single mixing chamber is different, thereby achieving the purpose of further mixing. Furthermore, in order to further increase the mixing effect of the gas in a single mixing chamber, spoilers 24 are staggered in the single mixing chamber. The staggered spoilers 24 can further increase the gas chaos, thereby achieving the purpose of fully mixing the corrosive gas. Finally, the uniformly mixed corrosive gas is transported to the high temperature environment box 6 through the third outlet pipe 36. When it is necessary to introduce a single corrosive medium that needs to be preheated (such as one of the water-oxygen corrosive medium and the oil-gas corrosive medium) into the high-temperature environment box 6, the solenoid valve on the mixing tube 23 can be closed, so that the single preheated corrosive medium is introduced into the second sub-chamber 31 or the first sub-chamber 32 through the first air guide pipe 15 or the second air guide pipe 29, respectively, and then transported to the high-temperature environment box 6 through the first outlet pipe 34 or the second outlet pipe 35. When it is necessary to introduce a single corrosive medium that does not need to be preheated (such as a salt spray corrosive medium) into the high-temperature environment box 6, the corrosive medium (such as a salt solution) in the corrosive medium storage chamber can be directly introduced into the high-temperature environment box 6 through a delivery pipe, and the delivery pipe is connected to an air inlet pipe connected to a gas compression device (such as an air compressor), so that the high-pressure gas and the corrosive medium are sent into the high-temperature environment box 6 together, thereby prompting the salt solution to enter the high-temperature environment box 6 after atomization, forming a salt spray corrosive environment.

[0036] In one achievable manner, the gas compression device includes an air compressor and an oxygen cylinder, wherein the air compressor is used to deliver high-pressure air to the mixed preheating furnace 14 and the high-temperature environment box 6, and the oxygen cylinder is used to deliver high-pressure oxygen to the mixed preheating furnace 14. The high-temperature corrosion device also includes a gas flow meter 16, which is used to detect the flow rate of the gas delivered to the mixed preheating furnace 14 and the high-temperature environment box 6, and transmit the detection signal to the control device 12, and the control device 12 regulates the flow rate of the introduced gas according to the detection value of the gas flow meter 16.

[0037] In one feasible manner, a plurality of atomizing nozzles 10 are arranged in the furnace chamber of the high-temperature environment box 6, and the atomizing nozzles 10 are connected to the liquid delivery pipeline and the gas delivery pipeline connected to the high-temperature environment box 6, so that the corrosive medium in the furnace chamber sent into the high-temperature environment box 6 is evenly atomized and then sprayed into the furnace chamber.

[0038] In one feasible manner, heating resistance wires, aluminum silicate plates, thermal insulation cotton and metal shells are sequentially arranged around the outer sides of the furnace cavities of the high-temperature environment box 6 and the mixed preheating furnace 14 from the inside to the outside, and the heating resistance wires are connected to the heating temperature control module 4, and the heating temperature control module 4 is connected to the control device 12. Temperature sensors are also arranged in the furnace cavities of the high-temperature environment box 6 and the mixed preheating furnace 14. The temperature sensors are used to detect the temperatures in the furnace cavities of the high-temperature environment box 6 and the mixed preheating furnace 14, and transmit signals to the control device 12. The control device 12 can adjust the temperatures in the furnace cavities of the high-temperature environment box 6 and the mixed preheating furnace 14 by controlling the heating temperature control module 4 according to the temperature detected by the temperature sensor.

[0039] In one achievable manner, the outer layer of the pipe used to transport gas or liquid is wrapped with a thermal insulation film.

[0040] In one feasible manner, a placement plate 25 for placing samples is provided in the furnace cavity of the high-temperature environment box 6, a sealed door 5 is also provided on the high-temperature environment box 6, and an insulation screen 14 is provided on the inner side of the sealed door 5, wherein the insulation screen 14 is used to prevent heat loss, and the sealed door 5 is used to prevent the corrosive atmosphere in the furnace from leaking out.

[0041] In one feasible manner, the high temperature environment box 6 is externally connected to an exhaust gas treatment device, which condenses, washes, and dries the high temperature exhaust gas before discharging it. Exemplarily, the exhaust gas treatment device may include an exhaust gas condensing device 11, an exhaust scrubbing device 13, and a gas drying device in sequence.

[0042] When conducting a corrosion experiment, such as a salt spray corrosion experiment, a salt solution prepared in proportion is loaded into the salt spray corrosion medium storage chamber, and the corrosion sample is placed on the storage plate 25 inside the high temperature environment box 6 and then the sealing door 5 is tightened. At this time, the gas flow meter 16 is connected to the air intake pipe on the air compressor, and the air intake pipe can be opened by the control device 12 to blow compressed air into the high temperature environment box 6, and then the corrosion temperature and the compressed air flow rate are set by the control device 12. When the high temperature environment box 6 reaches the preset temperature, the salt spray peristaltic pump is started to transport the salt solution to the high temperature environment box 6 through the salt spray medium delivery pipe. At the same time, the air intake pipe transports high-pressure air to the salt spray medium delivery pipe, and the salt spray medium delivery pipe is connected to the atomizing nozzle 10 in the high temperature environment box 6, so that the salt solution is uniformly atomized under the action of the compressed gas and the atomizing nozzle 13 and filled into the high temperature environment box 2, thereby realizing a preset stable salt spray corrosion environment in the high temperature environment box 2.

[0043] In the water-oxygen corrosion experiment, deionized water is loaded into the water-oxygen corrosion medium storage chamber, and the sample to be corroded is placed on the storage plate 25 inside the high-temperature environment box 6 and the sealing valve 12 is tightened. At this time, the gas flow meter 5 is connected to the air inlet pipe on the oxygen cylinder, and the air inlet pipe can be opened by the control device 12 to blow oxygen into the high-temperature environment box 6 to maintain a pure oxygen environment in the environment box, and then the corrosion temperature and oxygen flow rate are set by the control device 12, and the mixed preheating furnace 14 and the high-temperature environment box 6 reach the preset temperature, and the water-oxygen peristaltic pump is started to transport deionized water to the mixed preheating furnace 6, and the deionized water and oxygen are heated to a predetermined temperature and preliminarily mixed in the mixed preheating furnace 6, and the water-oxygen mixed gas is transported to the high-temperature environment box 6 through the outlet pipe, and the outlet pipe is connected to another atomizing nozzle 10 in the high-temperature environment box 6. The water-oxygen mixed gas is uniformly atomized under the action of the atomizing nozzle 10 and filled into the high-temperature environment box 6, thereby realizing a preset stable water-oxygen corrosion environment in the high-temperature environment box 6.

[0044] In the oil and gas corrosion experiment, kerosene is loaded into the oil and gas corrosion medium storage chamber, and the corrosion sample is placed on the storage plate 25 inside the high temperature environment box 6, and then the sealing valve 12 is tightened. At this time, the gas flow meter 5 is connected to the air intake pipe of the air compressor, and the control device 12 can be used to open the air intake pipe to blow compressed gas into the high temperature environment box 6, and then the corrosion temperature and compressed air flow rate are set by the control device 12. When the mixed preheating furnace 14 and the high temperature environment box 6 reach the preset temperature, the oil and gas peristaltic pump is started to transport kerosene to the mixed preheating furnace 6. The kerosene and compressed air are heated to a predetermined temperature and preliminarily mixed in the mixed preheating furnace 6 to generate oil smoke, which is transported to the high temperature environment box 6 through another air outlet pipe. The air outlet pipe is connected to another atomizing nozzle 10 in the high temperature environment box 6. The oil smoke is evenly atomized under the action of the atomizing nozzle 10 and filled into the high temperature environment box 6, thereby realizing a preset stable oil smoke corrosion environment in the high temperature environment box 6.

[0045] The oil-gas + water-oxygen corrosion experiment is different from the above-mentioned oil-gas corrosion experiment and water-oxygen corrosion experiment in that it is necessary to first blow compressed gas into the high-temperature environment box 6 through the control device 12, and then set the corrosion temperature and gas flow rate through the control device 12. When the mixed preheating furnace 14 and the high-temperature environment box 6 reach the preset temperature, the water-oxygen peristaltic pump and the oil-gas peristaltic pump are started respectively to transport deionized water and kerosene to the mixed preheating furnace 6. The deionized water and oxygen, kerosene and air are heated to a predetermined temperature in the mixed preheating furnace 6 and the two corrosive gases are fully mixed. Then, the water-oxygen and oil-gas mixed gas is transported to the high-temperature environment box 6 through the outlet pipe. The outlet pipe is connected to another atomizing nozzle 10 in the high-temperature environment box 6. The water-oxygen and oil-gas mixed gas is evenly atomized under the action of the atomizing nozzle 10 and filled into the high-temperature environment box 6, thereby realizing the preset stable oil-gas + water-oxygen corrosion environment in the high-temperature environment box 6.

[0046] Since the peristaltic pump and atomization operation corresponding to different corrosive media are independently controlled by the control device 12, two or more of the above experimental operations can be performed simultaneously, thereby realizing high-temperature corrosion experiments in various mixed corrosion environments, such as salt spray + oil and gas + water and oxygen corrosion experiments, salt spray + oil and gas corrosion experiments, salt spray + water and oxygen corrosion experiments, oil and gas + water and oxygen corrosion experiments, etc.

[0047] Obviously, those skilled in the art can make various changes and modifications to the technical solution without departing from the spirit and scope of the technical solution. Thus, if these modifications and variations of the technical solution fall within the scope of the claims of the technical solution and their equivalents, the technical solution is also intended to include these modifications and variations.

Claims

1. A high temperature corrosion device under a multi-condition corrosion atmosphere, characterized in that: include: A support frame (17), a high temperature environment box (6), a corrosive medium storage chamber, a gas compression device, a mixed preheating furnace (14), and a control device (12), wherein the high temperature environment box (6), the corrosive medium storage chamber, the gas compression device, the mixed preheating furnace (14), and the control device (12) are all installed on the support frame (17), wherein: The high temperature environment box (6) is used to contain samples and provide different corrosive atmospheres for the samples; Different corrosive media are stored in the corrosive medium storage chamber, and the corrosive media therein can be pumped into the high-temperature environment box (6) or the mixed preheating furnace (14); The gas compression device is connected to the high temperature environment box (6) and the mixed preheating furnace (14) respectively, and is used to transport compressed gas into the high temperature environment box (6) or the mixed preheating furnace (14), thereby atomizing the corrosive medium in the high temperature environment box (6) or the mixed preheating furnace (14); The mixing preheating furnace (14) is connected to the corrosive medium storage chamber, the high temperature environment box (6) and the gas compression device respectively, and is used to atomize and preheat the gas-liquid corrosive medium to be mixed, and to achieve uniform mixing between different types of gas-liquid corrosive media; The control device (12) is used to respectively control the delivery flow of the compressed gas and the corrosive medium, the preheating temperature of the mixed preheating furnace (14), and the corrosive atmosphere temperature of the high temperature environment box (6).

2. The high temperature etching device under multi-condition corrosion atmosphere as claimed in claim 1, characterized in that: The corrosive medium storage chamber comprises a first corrosive medium storage chamber (1) for containing deionized water, a second corrosive medium storage chamber (2) for containing a salt solution, and a third corrosive medium storage chamber (3) for containing kerosene.

3. The high temperature etching device under multi-condition corrosion atmosphere as claimed in claim 2, characterized in that: The high-temperature corrosion device further comprises a first peristaltic pump (7), a second peristaltic pump (8) and a third peristaltic pump (9), wherein the first peristaltic pump (7) is used to pump the deionized water in the first corrosive medium storage chamber (1) into the mixing preheating furnace (14), the second peristaltic pump (8) is used to pump the salt solution in the second corrosive medium storage chamber (2) into the high-temperature environment box (6), and the third peristaltic pump (9) is used to pump the kerosene in the third corrosive medium storage chamber (3) into the mixing preheating furnace (14).

4. The high temperature etching device under multi-condition corrosion atmosphere as claimed in claim 2, characterized in that: A first partition (28) and a second partition (18) arranged in a T-shape are arranged in the furnace chamber of the mixing preheating furnace (14), so as to divide the furnace chamber of the mixing preheating furnace (14) into a mixing chamber (27), a second sub-chamber (31) and a first sub-chamber (32); a double helical flow channel (30) is arranged in the first partition (28) from top to bottom; the upper ends of the two flow channels of the double helical flow channel (30) are respectively connected to a first liquid inlet pipe (19) and a second liquid inlet pipe (20); the lower end of one of the flow channels of the double helical flow channel (30) is respectively connected to a mixing pipe (23) and a first air guide pipe (15); the lower end of the other flow channel is respectively connected to a mixing pipe (23) and a second air guide pipe (29); the other end of the first liquid inlet pipe (19) is connected to a first corrosive medium storage chamber (1); the other end of the second liquid inlet pipe (20) is connected to a first corrosive medium storage chamber (1); The mixing tube (23), the first air guide tube (15) and the second air guide tube (29) are connected to three corrosive medium storage chambers (3); solenoid valves are installed on the mixing tube (23), the first air guide tube (15) and the second air guide tube (29); the mixing tube (23) is connected to the mixing chamber (27); the first air guide tube (15) is connected to the first sub-chamber (32); the second air guide tube (29) is connected to the second sub-chamber (31); the first liquid inlet tube (19) and the second liquid inlet tube (20) are connected to an inlet tube (33) for connecting to a gas compression device; the upper end of the mixing chamber (27) is connected to a third outlet tube (36) for conveying a mixed corrosive gas to a high-temperature environment box (6); the upper ends of the first sub-chamber (32) and the second sub-chamber (31) are respectively connected to a first outlet tube (34) and a second outlet tube (35) for conveying a single corrosive gas to the high-temperature environment box (6).

5. The high temperature etching device under multi-condition corrosion atmosphere as claimed in claim 4, characterized in that: The inner wall of the mixing chamber (27) is connected to a plurality of third partitions (22) arranged obliquely from top to bottom, the third partitions (22) divide the mixing chamber (27) into a plurality of mixing sub-chambers, one end of the third partition (22) is provided with a plurality of air holes (21), the air holes (21) on two third partitions (22) adjacent to each other are arranged in a staggered manner, the mixing tube (23) is located in the mixing sub-chamber at the lowermost end, the top and bottom surfaces of the third partition (22) are provided with a plurality of spoilers (24), and the upper and lower spoilers (24) in a single mixing sub-chamber are arranged in a staggered manner.

6. The high temperature etching device under multi-condition corrosion atmosphere according to claim 1, characterized in that: The gas compression device comprises an air compressor and an oxygen cylinder, wherein the air compressor is used to deliver high-pressure air to the mixed preheating furnace (14) and the high-temperature environment box (6), and the oxygen cylinder is used to deliver high-pressure oxygen to the mixed preheating furnace (14).

7. The high temperature etching device under multi-condition corrosion atmosphere as claimed in claim 1, characterized in that: The high-temperature corrosion device also includes a gas flow meter (16), which is used to detect the flow of gas delivered to the mixed preheating furnace (14) and the high-temperature environment box (6), and transmit the detection signal to the control device (12). The control device (12) adjusts the flow rate of the incoming gas according to the detection value of the gas flow meter (16).

8. The high temperature etching device under multi-condition corrosion atmosphere as claimed in claim 1, characterized in that: A plurality of atomizing nozzles (10) are arranged in the furnace chamber of the high temperature environment box (6); the atomizing nozzles (10) are connected to a liquid delivery pipeline and a gas delivery pipeline connected to the high temperature environment box (6), so that the corrosive medium in the furnace chamber of the high temperature environment box (6) is uniformly atomized and then sprayed into the furnace chamber.

9. The high temperature etching device under multi-condition corrosion atmosphere as claimed in claim 1, characterized in that: A heating resistor wire, an aluminum silicate plate, thermal insulation cotton and a metal shell are sequentially arranged around the outer sides of the furnace cavities of the high-temperature environment box (6) and the mixed preheating furnace (14) from the inside to the outside. The heating resistor wire is connected to a heating temperature control module (4), and the heating temperature control module (4) is connected to a control device (12). A temperature sensor is also arranged in the furnace cavities of the high-temperature environment box (6) and the mixed preheating furnace (14). The temperature sensor is used to detect the temperature in the furnace cavities of the high-temperature environment box (6) and the mixed preheating furnace (14), and transmit a signal to the control device (12). The control device (12) can adjust the temperature in the furnace cavities of the high-temperature environment box (6) and the mixed preheating furnace (14) by controlling the heating temperature control module (4) according to the temperature detected by the temperature sensor.

10. The high temperature etching device under multi-condition corrosion atmosphere as claimed in claim 2, characterized in that: A storage plate (25) for placing samples is provided in the furnace chamber of the high temperature environment box (6), and a sealing door (5) is also provided on the high temperature environment box (6), and a heat insulation screen (14) is provided on the inner side of the sealing door (5).

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