CN115615906A - Test evaluation device and method for simulating fluctuation scouring corrosion of fluid in reboiler - Google Patents
Test evaluation device and method for simulating fluctuation scouring corrosion of fluid in reboiler Download PDFInfo
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- CN115615906A CN115615906A CN202110795551.1A CN202110795551A CN115615906A CN 115615906 A CN115615906 A CN 115615906A CN 202110795551 A CN202110795551 A CN 202110795551A CN 115615906 A CN115615906 A CN 115615906A
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- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 238000011156 evaluation Methods 0.000 title claims abstract description 40
- 238000005260 corrosion Methods 0.000 title claims abstract description 34
- 230000007797 corrosion Effects 0.000 title claims abstract description 34
- 239000012530 fluid Substances 0.000 title claims abstract description 18
- 238000009991 scouring Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 230000003628 erosive effect Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 5
- 238000004088 simulation Methods 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 description 1
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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Abstract
The invention discloses a test evaluation device and a method for simulating the fluctuation erosion corrosion of fluid in a reboiler, wherein the test evaluation device comprises a steel cylinder, a kettle body and a wave generating system; the steel cylinder is used for introducing a simulated gas medium into the kettle body; the kettle body is of a top opening structure, and the top of the kettle body is detachably provided with a kettle cover; a simulated liquid medium is injected into the kettle body, a heating sleeve is arranged on the outer wall of the kettle body, a wave detection device, a temperature sensor and a pressure sensor are arranged in the kettle body, and a film hanger for mounting corrosion evaluation test pieces is arranged in the kettle body; the wave making system comprises a sliding mechanism, a connecting rope and a heavy hammer, wherein one end of the connecting rope is connected with the sliding mechanism, the other end of the connecting rope is connected with the heavy hammer, and the sliding mechanism is installed on the kettle cover. The method can be used for simulating the internal working condition of the reboiler and realizing the evaluation of reciprocating type circulating scouring and electrochemical common corrosion of the gas-liquid interface in the reboiler.
Description
Technical Field
The invention relates to the technical field of natural gas purification, in particular to a test evaluation device and method for simulating fluctuation scouring corrosion of fluid in a reboiler.
Background
The reboiler is a very important key device in the amine desulfurization system of the natural gas purification plant, and plays an important role in providing a heat source for the regeneration tower so as to regenerate the amine liquid (rich liquid).
The natural gas purification plant reboiler is usually a shell-and-tube type, the tube side is usually steam under pressure, and the shell side is usually the desulfurization solution, i.e. the desulfurization solution is heated by steam. The desulfurization solution is partially vaporized in the heating process, and a large gas-liquid interface exists in the reboiler to ensure a sufficient vaporization space. And metal parts at the gas-liquid interface are very easy to corrode and lose efficacy due to complex working conditions. Corrosion of these sites is also a major concern in research and production.
Furthermore, due to the vaporization process, the liquid in the shell side is not actually at rest, but is in a near boiling state, which causes a back and forth impact effect of the liquid on the metal contact surfaces, which effect is produced either by the tube heat pipes in the interior of the reboiler, the shell, or the internal baffles. It is easy to find that the working conditions of the parts mainly show reciprocating cyclic flushing and electrochemical joint corrosion of a gas-liquid interface under the coexistence condition of hydrogen sulfide and carbon dioxide.
However, with the current technical means, the corrosion behavior of the metal material cannot be evaluated by effectively simulating the type of working condition in a laboratory. In the field of domestic oil and gas field industry, devices such as high-pressure rotary hanging pieces, pipeline circulation loops and the like are generally adopted for material evaluation. However, it is difficult to accurately simulate the complex working conditions at the gas-liquid interface inside the reboiler, especially the reciprocating circular scouring working conditions at the gas-liquid interface. Furthermore, the optimization of the materials and conditions of the reboiler is still one of the troublesome problems that restrict the stable and efficient operation of the equipment.
Therefore, it is highly desirable to design a device capable of simulating the internal conditions of the reboiler for evaluating the corrosion of the material.
Disclosure of Invention
The invention aims to provide a test evaluation device for simulating fluctuation scouring corrosion of fluid in a reboiler, which is used for simulating internal working conditions of the reboiler and realizing evaluation of reciprocating type circulation scouring and electrochemical common corrosion of a gas-liquid interface in the reboiler.
The invention is realized by the following technical scheme:
a test evaluation device for simulating the fluctuation scouring corrosion of fluid in a reboiler comprises a steel cylinder, a kettle body and a wave generating system;
the steel cylinder is used for introducing a simulated gas medium into the kettle body;
the kettle body is of a top opening structure, and a detachable kettle cover is arranged at the top of the kettle body; a simulated liquid medium is injected into the kettle body, a heating sleeve is arranged on the outer wall of the kettle body, a wave detection device and a temperature and pressure integrated sensor are arranged in the kettle body, and a hanging piece device for installing a corrosion evaluation test piece is arranged in the kettle body;
the wave generating system comprises a sliding mechanism, a connecting rope and a heavy hammer, one end of the connecting rope is connected with the sliding mechanism, the other end of the connecting rope is connected with the heavy hammer, the sliding mechanism is installed on the kettle cover, and the movement of the heavy hammer in the vertical direction is realized through the sliding mechanism.
The simulated gas medium is used for simulating gas components in a reboiler of a desulfurization system of a natural gas purification plant, and is prepared by preparing hydrogen sulfide, carbon dioxide and methane gas in proportion.
The invention realizes that the heavy hammer enters and exits the liquid medium through the movement of the heavy hammer in the vertical direction to realize the fluctuation of the liquid medium in the kettle body and the formation of a wave flow state on the liquid level, the wave detection device can monitor the information such as the amplitude and the frequency of waves generated by a wave generation system, the temperature sensor and the pressure sensor can monitor the temperature and the pressure in the kettle body in real time, the heating sleeve is used for controlling the temperature of the whole test device and generally has a certain heat preservation effect, and the hanging piece is used for installing and fixing the corrosion evaluation test piece and can realize the installation at different angles.
In conclusion, the whole device is of a high-pressure kettle structure, liquid and gas are filled in the high-pressure kettle structure, the gas is input through a steel cylinder, the gas and the liquid respectively simulate gas and liquid phases in a reboiler, gas and liquid fluctuation is provided by a wave generation system, and a liquid level is impacted through a gravity hammer to cause a fluctuation effect.
Further, slide mechanism includes two slides, and two slide symmetries set up outer wall and the inner wall at the kettle cover, be provided with the magnetic force slider on the kettle cover outer wall in the slide, connect rope one end and be connected with the magnetic force slider that sets up at the kettle cover inner wall, the other end is connected with the weight, slide mechanism is still including being used for realizing connecting the gliding pulley of rope and the motor that drives the removal of magnetic force slider.
Two magnetic force sliders on the inner wall and the outer wall of the kettle cover attract each other, and realize reciprocating sliding under the traction of motor transmission, and finally drive the heavy punch to reciprocate up and down. Thereby generating waves. The frequency, amplitude and the like of the waves can be realized by setting heavy hammers with different sizes, the rotating speed of a motor and the like.
Furthermore, the weight and the connecting rope are detachably connected.
Furthermore, the sliding mechanism and the temperature and pressure integrated sensor of the wave detection device are in communication connection with the control unit.
Further, the control unit is in communication connection with the computer.
Further, a wave energy absorption device is arranged in the kettle body.
The wave energy absorption device is used for weakening and eliminating waves, and avoids secondary waves to cause interference caused by the fact that the waves return after contacting the wall surface of the kettle to the greatest extent.
Further, the bottom of the kettle body is provided with a drain pipe, a drain valve is arranged on the drain pipe, an air release pipe is arranged on the kettle cover, and an air release valve and an air release pressure gauge are arranged on the air release pipe.
Further, the steel cylinder is connected with the kettle body through a pipeline, and an air inlet valve and an air inlet pressure gauge are arranged on the pipeline.
Further, the kettle cover is connected with the kettle body through bolts.
The evaluation method of the test evaluation device based on the simulation of the fluctuation erosion corrosion of the fluid in the reboiler comprises the following steps:
s1, preparing a simulated liquid medium; preparing a simulated gas medium and injecting the simulated gas medium into a steel cylinder;
s2,; installing a film hanger, wherein a corrosion evaluation test piece is installed on the film hanger, and a kettle body is sealed by a kettle cover provided with a wave generating system;
s3, introducing nitrogen or methane into the kettle body to remove oxygen;
s4, injecting a simulation liquid medium into the kettle body;
s5, introducing a simulated gas medium into the kettle body through the steel cylinder, starting a temperature control system of the heating sleeve, heating the simulated liquid medium in the kettle body to a test temperature, and keeping the temperature constant during the test;
s6, starting a wave generating system to generate a reciprocating type scouring effect in the kettle;
and S7, after the test is finished, taking out the corrosion evaluation test piece for evaluation and analysis.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. compared with the conventional rotary hanging piece and circulation loop device, the test condition of the invention is closer to the gas-liquid fluctuation condition in the reboiler; the simulated working condition is more real, the test result is more accurate, and the control of the field working condition and the selection of materials can be guided.
2. The invention has simple structure, easy realization and simple operation method.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the structure of a test evaluation apparatus according to the present invention;
fig. 2 is a schematic diagram of a magnetic slider driven by a motor to slide.
Reference numbers and corresponding part names in the drawings:
the method comprises the following steps of 1-a steel cylinder, 2-an air inlet valve, 3-an air inlet pressure gauge, 4-an air discharge valve, 5-an air discharge pressure gauge, 6-a magnetic slider, 7-a slideway, 8-a pulley, 9-a motor, 10-a computer, 11-a control unit, 12-a wave detection device, 13-a temperature and pressure integrated sensor, 14-a blow-down valve, 15-a heavy hammer, 16-a piece hanging device, 17-a wave energy absorption device, 18-a kettle body, 19-a heating sleeve and 20-a bolt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
as shown in fig. 1-2, a test evaluation device for simulating the fluid fluctuation erosion corrosion in a reboiler comprises a steel cylinder 1, a kettle body 18 and a wave generating system;
the steel cylinder 1 is used for introducing a simulated gas medium into the kettle body 18;
the kettle body 18 is of a top opening structure, a kettle cover is arranged at the top of the kettle body 18 through a bolt 20, and the bolt 20 is used for sealing the kettle body 18 and the kettle cover, so that a medium in the kettle is prevented from leaking when an evaluation test is carried out; a simulated liquid medium is injected into the kettle body 18, a heating sleeve 19 is arranged on the outer wall of the kettle body 18, a wave detection device 12 and a temperature and pressure integrated sensor 13 are arranged in the kettle body 18, and a film hanger 16 for mounting a corrosion evaluation test piece is arranged in the kettle body 18;
the wave generating system comprises a sliding mechanism, a connecting rope and a heavy hammer 15, one end of the connecting rope is connected with the sliding mechanism, the other end of the connecting rope is connected with the heavy hammer 15, the sliding mechanism is installed on the kettle cover, and the heavy hammer 15 can move in the vertical direction through the sliding mechanism.
In this embodiment, slide mechanism includes two slides 7, and two slides 7 symmetry settings are provided with magnetic force slider 6 in the slide 7 of kettle cover on the institute's outer wall, connect rope one end and be connected with the magnetic force slider 6 that sets up at the kettle cover inner wall, the other end and the detachable connection of weight 15, slide mechanism is still including being used for realizing connecting the gliding pulley 8 of rope and the motor 9 of the removal of drive magnetic force slider 6, motor 9 is used for the drive to set up the magnetic force slider 6 that sets up at the kettle cover outer wall and is reciprocating motion in slide 7. Two magnetic force sliders 6 on the inner wall and the outer wall of the kettle cover are mutually attracted, and realize reciprocating sliding under the traction of the transmission of a motor 9, and finally drive a heavy hammer 15 to reciprocate up and down, so that waves are generated. The frequency, amplitude and the like of the waves can be realized by setting the heavy hammers 15 with different sizes, the rotating speed of the motor 9 and the like
In the embodiment, the motor 9, the wave detection device 12 and the temperature and pressure integrated sensor 13 of the sliding mechanism are all in communication connection with the control unit 11; the control unit 11 is in communication connection with the computer 10, the temperature and pressure integrated sensors 13 are used for assisting in evaluating the control of test conditions, and the wave detection device 12 is used for monitoring the frequency, amplitude and other information of artificial waves in the kettle; the control unit 11 and the computer 10 are used for realizing quantitative control of simulation test parameters such as temperature, pressure, wave frequency and amplitude.
In this embodiment, the bottom of the cauldron body 18 is provided with the blow off pipe, be provided with blowoff valve 14 on the blow off pipe, blowoff valve 14 is used for the experiment to finish the discharge of back cauldron internal liquid, be provided with the bleed pipe on the kettle cover, be provided with bleed valve 4 and gassing manometer 5 on the bleed pipe, through the pipe connection between steel bottle 1 and the cauldron body 18, be provided with admission valve 2 and the manometer 3 that admits air on this pipeline. And the air release valve 4 and the air release pressure gauge 5 are used for deoxidizing in the kettle and are used as an outlet for releasing pressure after the test is finished.
In the embodiment, the wave energy absorption device 17 is arranged in the kettle body 18, and the wave energy absorption device 17 is used for weakening and eliminating waves, so that the waves are prevented from contacting the kettle to the greatest extent and returning to the kettle to cause interference.
In the embodiment, the wave energy absorption device 17 is a honeycomb porous structure type baffle similar to a sponge, and can effectively weaken the impact force of waves.
In the present embodiment, the wave detecting device 12 is implemented by using the prior art, and mainly measures the change curve of the liquid level with time, and can convert the change curve by the relationship between the liquid level height and the hydrostatic pressure, or measure the change curve by the electrical principle (such as resistance, capacitance, inductance, etc.), or measure the change curve by the optical method.
In this embodiment, the rack 16 includes a support and a hanging rod, the hanging rod is mounted on the support, the support is mounted in the kettle 18, and the test piece is hung on the hanging rod through the through hole on the support.
The motor 9 drives the magnetic force slide block 6 to do reciprocating motion:
as shown in fig. 2, a motor shaft is provided with a turntable, the turntable is provided with a transmission rod which can be movably connected with a magnetic slider 6, the principle is similar to that of an automobile engine, and only the power transmission is reversed; the piston acts as a slider.
The evaluation method of the test evaluation device based on the embodiment comprises the following steps:
s1, preparing a simulated liquid medium, wherein the simulated liquid medium is a desulfurization solution, such as an MDEA solution, corrosive components such as heat-stable salts and degradation products can be prepared into the simulated liquid medium according to actual conditions, and hydrogen sulfide, carbon dioxide and methane gas are prepared according to a proportion; the device is used for simulating the gas composition in the reboiler of the desulfurization system of the natural gas purification plant; injecting the prepared simulated gas medium into the steel cylinder 1;
s2, installing a film hanger 16, installing a corrosion evaluation test piece on the film hanger 16, and sealing the kettle body 18 by using a kettle cover provided with a wave generating system;
s3, introducing nitrogen or methane into the kettle body 18 to remove oxygen;
s4, injecting a simulation liquid medium into the kettle body 18
S5, introducing a simulated gas medium into the kettle body 18 through the steel cylinder 1, controlling the pressure in the kettle to be in a condition required by a test under the assistance of the gas inlet pressure gauge 3, starting a temperature control system of the heating sleeve 19, heating the simulated liquid medium in the kettle body 18 to be at a test temperature, and keeping the temperature constant during the test;
s6, starting a wave generating system to generate a reciprocating type scouring effect in the kettle, and continuously monitoring by a wave detection device 12 and a temperature and pressure integrated sensor 13;
and S7, completing the test, closing the temperature control system, naturally cooling to room temperature, opening the air release valve 4, discharging the gas in the kettle, generally discharging the gas into the tail gas absorption device, replacing the gas in the kettle with nitrogen, disassembling the bolt 20, removing the kettle cover, taking down the test piece on the piece hanging device 16, observing, processing, weighing and the like.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A test evaluation device for simulating the fluctuation erosion corrosion of fluid in a reboiler is characterized by comprising a steel cylinder (1), a kettle body (18) and a wave generating system;
the steel cylinder (1) is used for introducing a simulated gas medium into the kettle body (18);
the kettle body (18) is of a top opening structure, and a detachable kettle cover is arranged at the top of the kettle body (18); a simulated liquid medium is injected into the kettle body (18), a heating sleeve (19) is arranged on the outer wall of the kettle body (18), a wave detection device (12) and a temperature and pressure integrated sensor (13) are arranged in the kettle body (18), and a film hanger (16) for mounting a corrosion evaluation test piece is arranged in the kettle body (18);
the wave generating system comprises a sliding mechanism, a connecting rope and a heavy hammer (15), one end of the connecting rope is connected with the sliding mechanism, the other end of the connecting rope is connected with the heavy hammer (15), the sliding mechanism is installed on the kettle cover, and the heavy hammer (15) can move in the vertical direction through the sliding mechanism.
2. The experimental evaluation device for simulating the fluid fluctuation erosion corrosion in the reboiler according to claim 1, wherein the sliding mechanism comprises two slide ways (7), the two slide ways (7) are symmetrically arranged on the outer wall and the inner wall of the kettle cover, a magnetic slider (6) is arranged in the slide way (7) on the kettle cover, one end of the connecting rope is connected with the magnetic slider (6) arranged on the inner wall of the kettle cover, the other end of the connecting rope is connected with a heavy hammer (15), and the sliding mechanism further comprises a pulley (8) for realizing the sliding of the connecting rope and a motor (9) for driving the magnetic slider (6) to move.
3. The device for simulating the test evaluation of the fluid wave erosion corrosion in the reboiler in the claim 1, wherein the weight (15) is detachably connected with the connecting rope.
4. A test evaluation device for simulating fluid wave erosion corrosion in a reboiler according to claim 1, wherein the sliding mechanism, the wave detection device (12) and the temperature and pressure integrated sensor (13) are all connected with the control unit (11) in communication.
5. A test evaluation device for simulating the fluctuating erosion corrosion of a fluid inside a reboiler according to claim 4, wherein said control unit (11) is communicatively connected to a computer (10).
6. A test evaluation device for simulating the fluid wave erosion corrosion in the reboiler according to claim 1, characterized in that the wave energy absorption device (17) is arranged in the kettle body (18).
7. The experimental evaluation device for simulating the fluid fluctuation erosion corrosion in the reboiler according to claim 1, characterized in that a drain pipe is arranged at the bottom of the kettle body (18), a drain valve (14) is arranged on the drain pipe, a vent pipe is arranged on the kettle cover, and a vent valve (4) and a vent pressure gauge (5) are arranged on the vent pipe.
8. The test evaluation device for simulating the fluid fluctuation erosion corrosion in the reboiler according to claim 1, characterized in that the steel cylinder (1) is connected with the kettle body (18) through a pipeline, and the pipeline is provided with an air inlet valve (2) and an air inlet pressure gauge (3).
9. A test evaluation device for simulating fluid wave erosive corrosion in a reboiler according to any one of claims 1-8, characterized in that the kettle cover is connected with the kettle body (18) through bolts (20).
10. The evaluation method of the test evaluation device for simulating the fluctuating scouring corrosion of the fluid in the reboiler based on any one of claims 1 to 9, characterized by comprising the steps of:
s1, preparing a simulated liquid medium; preparing a simulated gas medium and injecting the simulated gas medium into the steel cylinder (1);
s2,; installing a film hanger (16), installing a corrosion evaluation test piece on the film hanger (16), and sealing a kettle body (18) by using a kettle cover provided with a wave generating system;
s3, introducing nitrogen or methane into the kettle body (18) to remove oxygen;
s4, injecting a simulation liquid medium into the kettle body (18);
s5, introducing a simulated gas medium into the kettle body (18) through the steel cylinder (1), starting a temperature control system of the heating sleeve (19), heating the simulated liquid medium in the kettle body (18) to a test temperature, and keeping the temperature constant during the test;
s6, starting a wave generating system to manufacture a reciprocating type scouring effect in the kettle;
and S7, after the test is finished, taking out the corrosion evaluation test piece for evaluation and analysis.
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| CN204694578U (en) * | 2015-06-10 | 2015-10-07 | 宁波贝时特金属制品有限公司 | Cast anchor wire rope fatigue testing machine |
| CN105891094A (en) * | 2016-04-05 | 2016-08-24 | 合肥通用机械研究院 | Corrosion testing device capable of simulating complex environment and testing method thereof |
| CN205691447U (en) * | 2016-06-06 | 2016-11-16 | 黄河科技学院 | The simulation antiskid of concrete sash block bank protection and anti-rain drop erosion test device |
| CN107421878A (en) * | 2017-08-04 | 2017-12-01 | 西南石油大学 | A kind of corrosion experimental device and method of testing for simulating continuous duty operation |
| CN109856036A (en) * | 2018-12-27 | 2019-06-07 | 中国石油工程建设有限公司 | A kind of high temperature and pressure gas, liquid, solid three-phase erosion corrosion test device and method |
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