Leakage analysis device for solvent heat exchanger for aromatic hydrocarbon extraction

Abstract

The utility model relates to the technical field of heat exchanger leakage analysis, and discloses a solvent heat exchanger leakage analysis device for aromatic hydrocarbon extraction, which comprises an analysis structure, a corrosivity test structure and a humidification structure, and the corrosivity test structure and the humidification structure are respectively arranged on the analysis structure. The corrosivity testing structure comprises a testing container, a sliding groove, a spring, a first sliding block, an electric heating wire, a sensor, a rotating shaft, a motor and a cam, the testing container is in sliding connection with the cavity through the first sliding block and the sliding groove, the spring is installed between the bottom wall of the cavity and the testing container, and the electric heating wire is installed on the inner wall of the testing container. According to the corrosion testing device disclosed by the utility model, in the arranged corrosion testing structure, each part on the surface of a sample can be ensured to be in full and uniform contact with corrosive liquid, and the testing deviation caused by local concentration difference is avoided.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger leakage analysis technology, and in particular to a leakage analysis device for solvent heat exchangers used in aromatic extraction. Background Technology

[0002] Aromatic hydrocarbon extraction units play a crucial role in oil refining and chemical production, and solvent heat exchangers are the core equipment for ensuring the stable operation of the unit. The occurrence of tube bundle leaks in the heat exchangers has seriously interfered with the safe and stable operation of the unit, leading to shutdowns for maintenance and causing huge economic losses. In order to accurately locate the root cause of the leak and formulate an effective solution, it is necessary to cut off the leaking heat exchange tubes from the outside of the heat exchanger and conduct a detailed analysis from multiple perspectives.

[0003] In existing technologies, samples are directly immersed in corrosive liquids for corrosion testing. However, the samples may be unevenly distributed in the corrosive liquid, resulting in some sample surfaces having sufficient contact with the corrosive liquid while others have insufficient contact. Moreover, the testing environment is always at room temperature, while the actual working conditions are high-temperature environments. Therefore, the corrosion data obtained at room temperature will differ greatly from the actual situation. To address this, we propose a solvent heat exchanger leakage analysis device for aromatic hydrocarbon extraction. Utility Model Content

[0004] The purpose of this invention is to provide a leak analysis device for solvent heat exchangers used in aromatic hydrocarbon extraction, in order to solve the problems mentioned in the background art, where the sample may be unevenly distributed in the corrosive liquid when directly immersing it in the corrosive liquid for corrosion testing. This results in some sample surfaces having sufficient contact with the corrosive liquid while others have insufficient contact. Furthermore, the testing environment is always at room temperature, while the actual working conditions are high-temperature environments, so the corrosion data obtained at room temperature will differ greatly from the actual situation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a solvent heat exchanger leakage analysis device for aromatic hydrocarbon extraction, comprising an analysis structure, a corrosion testing structure, and a humidification structure. The corrosion testing structure and the humidification structure are respectively installed on the analysis structure. The corrosion testing structure includes a test container, a chute, a spring, a first slider, a heating wire, a sensor, a rotating shaft, a motor, and a cam. The test container is slidably connected to the cavity via the first slider, the chute, and the cavity. The spring is installed between the bottom wall of the cavity and the test container. The heating wire is installed on the inner wall of the test container. The sensor is installed in the bottom wall of the inner wall of the test container. The cam is installed on the motor via the rotating shaft.

[0006] As a preferred embodiment, the analysis structure includes an analyzer device, a support leg, a display screen, and a cavity. The support leg is fixedly installed at the bottom of the analyzer device, the display screen is installed on one side of the top of the analyzer device, and the cavity is located at the top of the analyzer device and on one side of the display screen.

[0007] As a preferred embodiment, the first slider is fixedly installed on the outer wall of the test container, the slide groove is formed on the inner wall of the cavity, the first slider extends into the slide groove, and the first slider and the slide groove are slidably connected, one end of the spring is fixedly connected to the test container, and the other end of the spring is fixedly connected to the bottom wall of the cavity.

[0008] As a preferred embodiment, the rotating shaft is rotatably installed inside the cavity, and one end of the rotating shaft extends through the analyzer equipment to the outside of the analyzer equipment. The motor is fixedly installed on the outside of the analyzer equipment, and the motor shaft of the motor is fixedly connected to one end of the rotating shaft. The cam is fixedly installed on the rotating shaft.

[0009] As a preferred embodiment, the humidification structure includes a guide rail, a second slider, a sealing cover, a water tank, a water pump, a hose, a spray pipe, and an atomizing nozzle. The guide rail is fixedly installed on the top of the analyzer and on both sides of the cavity. The second slider is fixedly installed on both ends of the sealing cover, and the second slider and the guide rail are slidably connected.

[0010] As a preferred embodiment, the water tank and water pump are fixedly installed on one side of the analyzer equipment, the water pump is connected to the water tank through a conduit, the spray pipe is fixedly installed inside the top of the sealing cover, the water pump is connected to the spray pipe through a hose, and the atomizing nozzle is fixedly installed at the bottom of the spray pipe.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. In the corrosion test structure, the motor drives the rotating shaft, causing the cam to rotate and make intermittent contact with the test container. The spring makes the test container vibrate back and forth, ensuring that all parts of the sample surface can fully and evenly contact the corrosive liquid, avoiding test deviations caused by local concentration differences. This makes the test results more realistically reflect the interaction between the heat exchanger and the corrosive medium in actual use. The heating wire heats the test container to simulate the temperature environment of the heat exchanger in actual operation. Different temperature conditions will significantly affect the rate and extent of the corrosion reaction. By precisely controlling the test temperature, the entire corrosion test process can be made more consistent with the actual operating conditions of the heat exchanger, improving the reference value of the test results for practical applications.

[0013] 2. Through the humidification structure, the water pump draws water from the water tank into the spray pipe through the hose, and then sprays it into the test container through the atomizing nozzle. By adjusting the humidity, the test can more realistically reflect the interaction between the heat exchanger and the humid and corrosive medium in actual use, comprehensively consider the impact of humidity on corrosion, and incorporate the humidity factor into the test system. This makes up for the one-sidedness of the test when the influence of humidity is ignored, thus providing more complete and accurate information for the analysis of the cause of heat exchanger leakage. Attached Figure Description

[0014] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0015] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 4 This is a schematic diagram of the test container of this utility model;

[0018] Figure 5 This is a top cross-sectional view of the test container of this utility model;

[0019] Figure 6 This is a schematic diagram of the humidification structure of this utility model.

[0020] In the diagram: 1. Analysis structure; 11. Analyzer equipment; 12. Support leg; 13. Display screen; 14. Cavity; 2. Corrosion test structure; 21. Test container; 22. Slide groove; 23. Spring; 24. First slider; 25. Heating wire; 26. Sensor; 27. Rotating shaft; 28. Motor; 29. ​​Cam; 3. Humidification structure; 31. Guide rail; 32. Second slider; 33. Sealing cover; 34. Water tank; 35. Water pump; 36. Hose; 37. Nozzle; 38. Atomizing nozzle. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1:

[0023] Please see the appendix Figure 1 - Appendix Figure 5A solvent heat exchanger leakage analysis device for aromatic extraction includes an analysis structure 1, a corrosion testing structure 2, and a humidification structure 3. The corrosion testing structure 2 and the humidification structure 3 are respectively installed on the analysis structure 1. The analysis structure 1 includes an analyzer device 11, a support leg 12, a display screen 13, and a cavity 14. The support leg 12 is fixedly installed at the bottom of the analyzer device 11 and provides support for the analyzer device 11. The display screen 13 is installed on one side of the top of the analyzer device 11. The cavity 14 is located at the top of the analyzer device 11 and on one side of the display screen 13. The analyzer device 11 is a prior art device.

[0024] The corrosion test structure 2 includes a test container 21, a slide 22, a spring 23, a first slider 24, a heating wire 25, a sensor 26, a rotating shaft 27, a motor 28, and a cam 29. The first slider 24 is fixedly installed on the outer wall of the test container 21. The slide 22 is formed on the inner wall of the cavity 14, and the first slider 24 extends into the slide 22 and is slidably connected to the slide 22. One end of the spring 23 is fixedly connected to the test container 21, and the other end of the spring 23 is fixedly connected to the bottom wall of the cavity 14. The test container 21 slides back and forth due to the spring 23. A heating wire 25 is installed to heat the test container 21. A sensor 26 is installed in the bottom wall of the test container 21 and is electrically connected to the analyzer device 11. A rotating shaft 27 is rotatably installed inside the cavity 14, and one end of the rotating shaft 27 extends through the analyzer device 11 to the outside of the analyzer device 11. A motor 28 is fixedly installed on the outside of the analyzer device 11, and the motor shaft of the motor 28 is fixedly connected to one end of the rotating shaft 27. A cam 29 is fixedly installed on the rotating shaft 27. The sensor 26 includes a temperature sensor, a pH sensor, a corrosion potential sensor, etc.

[0025] Heat exchanger tubes are generally made of carbon steel and low alloy steel. A 4% nitric acid alcohol solution is commonly used for etching carbon steel and low alloy steel. This solution is added to test container 21. A sample from the leaking location of the heat exchanger tube is then placed into test container 21. The sample is then subjected to a corrosion test using the etching solution. Motor 28 is started, and its motor shaft drives rotating shaft 27 to rotate. Rotating shaft 27 drives cam 29 to rotate. Cam 29 contacts test container 21, causing it to vibrate reciprocally via spring 23, thus thoroughly mixing the sample and etching solution. Heating wire 25 heats test container 21, raising the temperature of the etching solution to simulate the actual operating temperature of the heat exchanger, making the corrosion test more accurate. Sensor 26 monitors the temperature of the etching solution, measures the solution's pH in real time, and acquires the corrosion potential data of the sample. Sensor 26 transmits the collected analog signals to analyzer device 11, and the corrosion data is then displayed on display screen 13.

[0026] Specifically, in the corrosion test structure 2, the motor 28 drives the rotating shaft 27, causing the cam 29 to rotate and make intermittent contact with the test container 21. The spring 23 makes the test container 21 vibrate back and forth, ensuring that all parts of the sample surface can fully and evenly contact the corrosive liquid, avoiding test deviations caused by local concentration differences. This makes the test results more realistically reflect the interaction between the heat exchanger and the corrosive medium in actual use. The heating wire 25 heats the test container 21, simulating the temperature environment of the heat exchanger in actual operation. Different temperature conditions will significantly affect the rate and extent of the corrosion reaction, making the entire corrosion test process more in line with the actual operating conditions of the heat exchanger and improving the reference value of the test results for practical applications.

[0027] Example 2:

[0028] Please see the appendix Figure 1 and attached Figure 6 Based on Embodiment 1, the humidification structure 3 includes a guide rail 31, a second slider 32, a sealing cover 33, a water tank 34, a water pump 35, a hose 36, a spray pipe 37, and an atomizing nozzle 38. The guide rail 31 is fixedly installed on the top of the analyzer device 11 and on both sides of the cavity 14. The second slider 32 is fixedly installed on both ends of the sealing cover 33. The second slider 32 and the guide rail 31 are slidably connected. The sealing cover 33 slides on the guide rail 31 via the second slider 32. The water tank 34 and the water pump 35 are fixedly installed on the analyzer. On one side of the device 11, a water pump 35 is connected to a water tank 34 via a conduit. A spray pipe 37 is fixedly installed inside the top of a sealing cover 33. The water pump 35 is connected to the spray pipe 37 via a hose 36. An atomizing nozzle 38 is fixedly installed at the bottom of the spray pipe 37. The water pump 35 draws water from the water tank 34 into the spray pipe 37, and the water is atomized and sprayed out through the atomizing nozzle 38. The sprayed water mist enters the test container 21. The water mist can adjust the humidity of the corrosion test, making the corrosion test data more accurate.

[0029] Specifically, through the humidification structure 3, the water pump 35 draws water from the water tank 34 into the spray pipe 37 via the hose 36, and then sprays it into the test container 21 through the atomizing nozzle 38. By adjusting the humidity, the test can more realistically reflect the interaction between the heat exchanger and the humid and corrosive medium in actual use, comprehensively consider the influence of humidity on corrosion, incorporate the humidity factor into the test system, make up for the one-sidedness of the test when the influence of humidity is ignored, and thus provide more complete and accurate information for the analysis of the cause of heat exchanger leakage.

[0030] Working principle of this utility model: This utility model is a leak analysis device for solvent heat exchangers used in aromatic hydrocarbon extraction. When the device is working, the leaked sample from the heat exchanger tube is first placed into a test container 21 containing a 4% nitric acid alcohol solution for corrosion. The motor 28 drives the rotating shaft 27, causing the cam 29 to rotate and make intermittent contact with the test container 21. The spring 23 causes the test container 21 to vibrate back and forth, so as to achieve full mixing of the sample and the corrosion solution. At the same time, the heating wire 25 heats the test container 21 to simulate the actual operating temperature of the heat exchanger. The sensor 26 monitors the temperature of the corrosion solution, measures the acidity and alkalinity of the solution, and obtains the corrosion potential data of the sample in real time. The analog signal is transmitted to the analyzer 11, and the corrosion data is displayed on the display screen 13. In addition, the water pump 35 draws water from the water tank 34 into the spray pipe 37 through the hose 36, and sprays it into the test container 21 after atomization through the atomizing nozzle 38 to adjust the humidity of the corrosion test and make the test data more accurate.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 solvent heat exchanger leakage analysis device for aromatic hydrocarbon extraction, characterized in that: The system includes an analysis structure (1), a corrosion testing structure (2), and a humidification structure (3). The corrosion testing structure (2) and the humidification structure (3) are respectively installed on the analysis structure (1). The corrosion testing structure (2) includes a test container (21), a slide (22), a spring (23), a first slider (24), a heating wire (25), a sensor (26), a rotating shaft (27), a motor (28), and a cam (29). The test container (21) is slidably connected by the first slider (24), the slide (22), and the cavity (14). The spring (23) is installed between the bottom wall of the cavity (14) and the test container (21). The heating wire (25) is installed on the inner wall of the test container (21). The sensor (26) is installed in the bottom wall of the inner wall of the test container (21). The motor (28) is mounted on the cam (29) through the rotating shaft (27).

2. The solvent heat exchanger leakage analysis device for aromatic hydrocarbon extraction according to claim 1, characterized in that: The analysis structure (1) includes an analyzer (11), a support (12), a display screen (13), and a cavity (14). The support (12) is fixedly installed at the bottom of the analyzer (11). The display screen (13) is installed on one side of the top of the analyzer (11). The cavity (14) is located at the top of the analyzer (11) and on one side of the display screen (13).

3. The solvent heat exchanger leakage analysis device for aromatic hydrocarbon extraction according to claim 1, characterized in that: The first slider (24) is fixedly installed on the outer wall of the test container (21), the slide groove (22) is opened on the inner wall of the cavity (14), the first slider (24) extends into the slide groove (22), and the first slider (24) and the slide groove (22) are slidably connected. One end of the spring (23) is fixedly connected to the test container (21), and the other end of the spring (23) is fixedly connected to the bottom wall of the cavity (14).

4. The solvent heat exchanger leakage analysis device for aromatic hydrocarbon extraction according to claim 3, characterized in that: The rotating shaft (27) is rotatably installed inside the cavity (14), and one end of the rotating shaft (27) extends through the analyzer device (11) to the outside of the analyzer device (11). The motor (28) is fixedly installed on the outside of the analyzer device (11), and the motor shaft of the motor (28) is fixedly connected to one end of the rotating shaft (27). The cam (29) is fixedly installed on the rotating shaft (27).

5. The solvent heat exchanger leakage analysis device for aromatic hydrocarbon extraction according to claim 1, characterized in that: The humidification structure (3) includes a guide rail (31), a second slider (32), a sealing cover (33), a water tank (34), a water pump (35), a hose (36), a spray pipe (37), and an atomizing nozzle (38). The guide rail (31) is fixedly installed on the top of the analyzer device (11) and on both sides of the cavity (14). The second slider (32) is fixedly installed on both ends of the sealing cover (33). The second slider (32) and the guide rail (31) are slidably connected.

6. The solvent heat exchanger leakage analysis device for aromatic hydrocarbon extraction according to claim 5, characterized in that: The water tank (34) and water pump (35) are fixedly installed on one side of the analyzer device (11). The water pump (35) is connected to the water tank (34) through a conduit. The nozzle (37) is fixedly installed inside the top of the sealing cover (33). The water pump (35) is connected to the nozzle (37) through a hose (36). The atomizing nozzle (38) is fixedly installed at the bottom of the nozzle (37).

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