CN220063779U - Test equipment for dynamic high-temperature molten salt corrosion - Google Patents
Test equipment for dynamic high-temperature molten salt corrosion Download PDFInfo
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- CN220063779U CN220063779U CN202321548089.6U CN202321548089U CN220063779U CN 220063779 U CN220063779 U CN 220063779U CN 202321548089 U CN202321548089 U CN 202321548089U CN 220063779 U CN220063779 U CN 220063779U
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- 150000003839 salts Chemical class 0.000 title claims abstract description 64
- 238000005260 corrosion Methods 0.000 title claims abstract description 47
- 230000007797 corrosion Effects 0.000 title claims abstract description 47
- 238000012360 testing method Methods 0.000 title claims abstract description 43
- 238000001816 cooling Methods 0.000 claims description 29
- 230000000087 stabilizing effect Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 15
- 238000011161 development Methods 0.000 claims description 2
- 230000018109 developmental process Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 13
- 238000004088 simulation Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The utility model belongs to the technical field of material detection, and discloses test equipment for dynamic high-temperature molten salt corrosion, which aims to solve the problems in the prior art of high-temperature molten salt simulation corrosion test equipment. The utility model provides a high-temperature molten salt corrosion environment for a test sample, and can perform various dynamic molten salt corrosion environments, such as a slow low-temperature dynamic molten salt corrosion test, a fast low-temperature dynamic molten salt corrosion test, a slow high-temperature dynamic molten salt corrosion test and a fast high-temperature dynamic molten salt corrosion test under different atmospheres.
Description
Technical Field
The utility model relates to the technical field of material detection, in particular to test equipment for dynamic high-temperature molten salt corrosion.
Background
The heat-collecting type solar photo-thermal power generation technology CSP can convert solar energy into electric energy, is a power generation mode with high efficiency and clean energy, and has become a focus of attention in various countries in recent years. CSP is an important clean renewable energy technology, can fundamentally change the energy consumption structure of China mainly comprising fossil fuel, and can accelerate the realization of the peak and the neutralization of carbon in China. The CSP technology uses molten salt in a large amount for heat transfer and heat storage, and the molten salt has certain corrosiveness at high temperature, so that equipment such as a container, a pipeline and the like contacted with the high-temperature molten salt can be corroded by the molten salt in the long-term service process, and the risk of molten salt leakage is caused. Therefore, the corrosion resistance of the structural material is researched, the corrosion rate and mechanism of the material are evaluated, and theoretical basis and scientific guidance can be provided for the aspects of design, material selection, maintenance, repair, replacement and the like of the material contacted with the high-temperature molten salt in the CSP power station.
Based on corrosion rate and life analysis of high temperature molten salt measured in laboratory, the method is the most important and fundamental research mode.
However, the long-time dynamic corrosion test results of the material in a high-temperature molten salt environment for thousands of hours are extremely few, meanwhile, laboratory experiment conditions are difficult to simulate real working conditions, and the lack of special equipment for dynamic high-temperature molten salt corrosion is one of the reasons, so that special experiment equipment which can stably work in the high-temperature working conditions for a long time and simulate the real flowing speed of molten salt in a pipeline is required to be used for carrying out the long-time dynamic high-temperature molten salt corrosion test to simulate the real working conditions.
CN201921842971.5 discloses a high-temperature molten salt dynamic corrosion test device, which comprises a heating furnace for storing high-temperature molten salt, a stirring system for stirring the high-temperature molten salt, and a sample hook for hanging a sample. Compared with the device, the device has the following technical problems: 1. because the sample of the device is hung on the sample hook and cannot move along with the stirring system, the scouring speed of molten salt on the surface of the sample is difficult to accurately control; 2. the device has no vacuumizing and inflating functions, so that the corrosion atmosphere cannot be controlled; 3. because of the lack of thermocouples inserted into the liquid molten salt, the temperature of the molten salt cannot be accurately controlled; 4. the lack of a stabilizing device like the present device for controlling large aspect ratio turnbars and the lack of a cooling system for the stirring shaft present great challenges for long term operation stability of the device.
CN202022835344.8 discloses a high-temperature molten salt working condition simulation test system, which comprises an environmental test box and a molten salt storage tank. Compared with the device, the device has the following technical problems: the device lacks a control system of the flow rate of molten salt, so that the corrosion simulation of the molten salt in a flowing state cannot be performed, and the real dynamic corrosion working condition of the molten salt cannot be simulated.
Disclosure of Invention
The utility model aims to solve the problems in the high-temperature molten salt simulation corrosion test equipment in the prior art and provides the test equipment for dynamic high-temperature molten salt corrosion.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a test equipment that developments high temperature fused salt corrodes, includes the cauldron body, and the furnace body is equipped with in the lower part outside of the cauldron body, and the furnace body inner wall is provided with the thermocouple, and the thermocouple is connected with the temperature control appearance that sets up at the furnace body, the upper portion outside of the cauldron body is equipped with down the cooling jacket, and the top of the cauldron body is equipped with flange, still is equipped with the (mixing) shaft in the cauldron body, and the lower extreme of (mixing) shaft is connected with the string piece and presss from both sides, and the string piece presss from both sides and is used for fixed sample, is connected with direct current motor after stretching out flange in the upper end of (mixing) shaft, still be connected with admission valve, discharge valve, temperature measuring device, feed inlet on the flange.
Further, a stabilizing device is arranged on the outer side of the stirring shaft close to the connecting flange, the stabilizing device comprises a first hollow cylinder fixed with the connecting flange, the lower end of the first hollow cylinder is connected with a second hollow cylinder, a stabilizing bearing is arranged on the inner side of the connecting position of the first hollow cylinder and the second hollow cylinder, and the inner ring of the stabilizing bearing is connected with the stirring shaft.
Further, an upper cooling sleeve is arranged at the top of the connecting flange, and the stirring shaft is arranged in the upper cooling sleeve in a penetrating way.
Further, the top of the upper cooling jacket is detachably provided with a magnetic coupler, and the top of the magnetic coupler is detachably provided with a direct current motor.
Further, the temperature measuring device comprises a temperature measuring protection tube arranged on the connecting flange, the lower end of the temperature measuring protection tube extends to the lower part of the kettle body, and the temperature measuring protection tube is internally used for installing a high-precision thermocouple.
Further, the lower part of the lower cooling sleeve is provided with a lower water inlet, and the upper part of the lower cooling sleeve is provided with a lower water outlet.
Further, the lower part of the upper cooling sleeve is provided with an upper water inlet, and the upper part of the upper cooling sleeve is provided with an upper water outlet.
Further, handles are symmetrically arranged on two sides of the connecting flange.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model provides a high-temperature molten salt corrosion environment for a test sample, and can be matched with a rotating assembly to perform various dynamic molten salt corrosion environments, such as a slow low-temperature dynamic molten salt corrosion test under different atmospheres, a fast low-temperature dynamic molten salt corrosion test under different atmospheres, a slow high-temperature dynamic molten salt corrosion test under different atmospheres and a fast high-temperature dynamic molten salt corrosion test under different atmospheres.
2. The utility model cools the rotating device through the water-cooling sleeve structure, thereby ensuring the long-time working stability of the rotating device. And meanwhile, the evaporated salt is cooled and refluxed, so that the stability of molten salt components in the kettle body is ensured.
3. According to the utility model, the stabilizing device is arranged, the bearing is added to stabilize the rotating shaft, the problem of large-length-diameter ratio rotating shaft centrifugation is effectively prevented, and the stable and high enough rotating speed is ensured, so that the dynamic corrosion rate of the material under the real working condition is accurately obtained, the corrosion resistance of the structural material is researched, the corrosion rate and mechanism of the material are evaluated, and theoretical basis and scientific guidance are provided for the aspects of designing, selecting materials, maintaining, replacing and the like of the material contacted with high-temperature molten salt in the CSP power station.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic structural view of the connecting flange of the present utility model.
Fig. 3 is a schematic structural view of the stabilizing device of the present utility model.
Fig. 4 is a schematic structural view of the hanging clip of the present utility model.
FIG. 5 is a schematic representation of a sample of the present utility model.
FIG. 6 is a graph showing the mass loss of the test specimen for dynamic corrosion in the example of the present utility model.
The reference numerals have the following meanings: 1. a DC motor; 2. a magnetic coupler; 3. an intake valve; 4. a water outlet; 5. a cooling jacket is arranged; 6. an upper water inlet; 7. a connecting flange; 8. a lower water outlet; 9. a lower cooling jacket; 10. a lower water inlet; 11. a kettle body; 12. a hanging clip; 13. a pressure gauge; 14. a safety valve; 15. a stabilizing device; 16. stabilizing the bearing; 17. a stirring shaft; 18. a temperature measurement protection tube; 19. fused salt; 20. a furnace body; 21. a temperature controller; 22. a handle; 23. an exhaust valve; 24. a feed inlet; 25. a temperature measuring device; 26. a first hollow cylinder; 27. a second hollow cylinder; 28. and (3) a sample.
Detailed Description
The utility model is further described below with reference to the drawings and the detailed description.
As shown in figures 1-5, the dynamic high-temperature molten salt corrosion test equipment comprises a kettle body 11, a furnace body 20 is arranged on the outer side of the lower part of the kettle body 11, a thermocouple is arranged on the inner wall of the furnace body 20 and connected with a temperature controller 21 arranged on the furnace body 20, a lower cooling sleeve 9 is welded on the outer side of the upper part of the kettle body 11, a lower water inlet 10 is arranged on the lower part of the lower cooling sleeve 9, a lower water outlet 8 is arranged on the upper part of the lower cooling sleeve 9, the top of the kettle body 11 is connected with a connecting flange 7 through a bolt, a stirring shaft 17 is further arranged in the kettle body 11, the top of the connecting flange 7 is connected with the cooling sleeve 5 through a thread, the stirring shaft 17 penetrates through the upper cooling sleeve 5, an upper water inlet 6 is arranged on the lower part of the upper cooling sleeve 5, and an upper water outlet 4 is arranged on the upper part of the upper cooling sleeve 5.
The lower extreme of (mixing) shaft 17 has hanging piece clamp 12 through threaded connection, hanging piece clamp 12's lower extreme is equipped with a plurality of hanging piece apertures, every hanging piece aperture is used for fixed sample 28, be connected with magnetic coupling 2 after the flange 7 is stretched out to the upper end of (mixing) shaft 17, direct current motor 1 is equipped with through bolt and flange to the top of magnetic coupling 2, magnetic coupling 2 passes through flange and bolted connection with last cooling jacket 5, flange 7's bilateral symmetry welding has handle 22, still be connected with air inlet valve 3 on the flange 7, discharge valve 23, temperature measuring device 25, feed inlet 24, the relief valve pipeline, be equipped with relief valve 14 and manometer 13 on the relief valve pipeline. The temperature measuring device comprises a temperature measuring protection tube 18 arranged on the connecting flange 7, the lower end of the temperature measuring protection tube 18 extends to the lower part of the kettle body 11, and a high-precision thermocouple is arranged in the temperature measuring protection tube 18.
The stabilizing device 15 is arranged on the outer side of the stirring shaft 17 close to the connecting flange 7, the stabilizing device 15 comprises a first hollow cylinder 26 fixed with the connecting flange 7, the top of the first hollow cylinder 26 is welded on the connecting flange 7, the lower end of the first hollow cylinder 26 is connected with a second hollow cylinder 27 in a threaded mode, the inner side of the joint of the first hollow cylinder 26 and the second hollow cylinder 27 is provided with a stabilizing bearing 16, and the inner ring of the stabilizing bearing 16 is connected with the stirring shaft 17.
Dynamic corrosion experiment in high-temperature molten salt corrosion environment, wherein the molten salt is 60% NaNO 3 +40%KNO 3 The mixed salt has the test temperature of 600 ℃, the test material is GH3625 superalloy, and the simulated actual flow rate is 1.5m/s, and the specific steps are as follows:
after connecting test equipment, pretreating a sample 28, wherein the size of the sample 28 is 20mm multiplied by 1.3mm, sanding six sides (180,600,1500 #) with sand paper, connecting the sample 28 with a hanging piece clamp 12, placing the hanging piece clamp in a kettle body 11, connecting the test equipment, and adding the prepared molten salt 19 into the kettle body 11 along a feed port 24 to enable the sample 28 to be completely immersed in the molten salt 19.
And 2, vacuumizing through an exhaust valve 23, closing the exhaust valve 23 when the pressure reaches-0.1 MPa, opening an air inlet valve 3, introducing argon, closing the air inlet valve 3 after the pressure reaches 0.1MPa, and setting a safety valve 14 to maintain the atmosphere environment inside the kettle body 11.
And 3, controlling the temperature of the furnace body 20 through the temperature controller 21 and the thermocouple, simultaneously introducing circulating cooling water from the upper water inlet 6 and the lower water inlet 10, and adjusting the external temperature controller 21 of the furnace body 20 until the temperature of the high-precision thermocouple in the temperature measurement protection tube 18 reaches 600 ℃ of the target test temperature.
And 4, setting the radius of the hanging piece clamp 12 to be 6cm, simulating the rotating speed to be 478RPM when the flow rate is 1.5m/s according to the relation between the angular speed and the linear speed, and slowly increasing the rotating speed of the direct current motor 1 through a rotating speed controller until the speed is stabilized at 478 (+ -3) RPM.
The dynamic corrosion experiment in the high-temperature molten salt corrosion environment lasts 600 hours. Due to the addition of the stabilizing device 15, the equipment is stable in operation during the test, and no unexpected conditions such as shutdown and the like occur. The transmission is performed by adopting the magnetic coupler 2, so that the device has excellent pressure maintaining capability, and no pollution phenomenon of corrosive atmosphere environment occurs during the test. Due to the addition of the cooling jacket, the molten salt evaporated at high temperature during the test was all cooled back and the sample was completely immersed in the molten salt during the test for up to 600 hours.
Fig. 6 shows a mass loss curve of the dynamic corrosion test sample in the present high temperature molten salt corrosion environment.
Claims (8)
1. The utility model provides a test equipment that developments high temperature fused salt corrodes, includes the cauldron body (11), and furnace body (20) are equipped with in the lower part outside of the cauldron body (11), and furnace body (20) inner wall is provided with the thermocouple, and the thermocouple is connected characterized by with temperature controller (21) that set up at furnace body (20): the upper portion outside of the cauldron body (11) is equipped with down cooling jacket (9), and the top of the cauldron body (11) is equipped with flange (7), still is equipped with (mixing) shaft (17) in the cauldron body (11), and the lower extreme of (mixing) shaft (17) is connected with hanging piece clamp (12), and hanging piece clamp (12) are used for fixed sample (28), are connected with direct current motor (1) after the flange (7) is stretched out to the upper end of (mixing) shaft (17), still be connected with on flange (7) admission valve (3), discharge valve (23), temperature measuring device (25), feed inlet (24).
2. The test equipment for dynamic high-temperature molten salt corrosion according to claim 1, wherein: a stabilizing device (15) is arranged on the outer side of a stirring shaft (17) close to the connecting flange (7), the stabilizing device (15) comprises a first hollow cylinder (26) fixed with the connecting flange (7), a second hollow cylinder (27) is connected to the lower end of the first hollow cylinder (26), a stabilizing bearing (16) is arranged on the inner side of the joint of the first hollow cylinder (26) and the second hollow cylinder (27), and the inner ring of the stabilizing bearing (16) is connected with the stirring shaft (17).
3. The test equipment for dynamic high-temperature molten salt corrosion according to claim 2, wherein: an upper cooling sleeve (5) is arranged at the top of the connecting flange (7), and a stirring shaft (17) is arranged in the upper cooling sleeve (5) in a penetrating way.
4. A test apparatus for dynamic high temperature molten salt corrosion as claimed in claim 3, wherein: the top of the upper cooling sleeve (5) is detachably provided with a magnetic coupler (2), and the top of the magnetic coupler (2) is detachably provided with a direct current motor (1).
5. The test equipment for dynamic high-temperature molten salt corrosion according to claim 4, wherein: the temperature measuring device comprises a temperature measuring protection tube (18) arranged on the connecting flange (7), the lower end of the temperature measuring protection tube (18) extends to the lower part of the kettle body (11), and a high-precision thermocouple is arranged in the temperature measuring protection tube (18).
6. The test equipment for dynamic high-temperature molten salt corrosion according to claim 1, wherein: the lower part of the lower cooling sleeve (9) is provided with a lower water inlet (10), and the upper part of the lower cooling sleeve (9) is provided with a lower water outlet (8).
7. The test equipment for dynamic high-temperature molten salt corrosion according to claim 4, wherein: an upper water inlet (6) is arranged at the lower part of the upper cooling sleeve (5), and an upper water outlet (4) is arranged at the upper part of the upper cooling sleeve (5).
8. The test equipment for dynamic high-temperature molten salt corrosion according to claim 1, wherein: handles (22) are symmetrically arranged on two sides of the connecting flange (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321548089.6U CN220063779U (en) | 2023-06-16 | 2023-06-16 | Test equipment for dynamic high-temperature molten salt corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321548089.6U CN220063779U (en) | 2023-06-16 | 2023-06-16 | Test equipment for dynamic high-temperature molten salt corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220063779U true CN220063779U (en) | 2023-11-21 |
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ID=88755793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321548089.6U Active CN220063779U (en) | 2023-06-16 | 2023-06-16 | Test equipment for dynamic high-temperature molten salt corrosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220063779U (en) |
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2023
- 2023-06-16 CN CN202321548089.6U patent/CN220063779U/en active Active
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