CN101021465A - Rotary single-phase flow wash-out testing device - Google Patents
Rotary single-phase flow wash-out testing device Download PDFInfo
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- CN101021465A CN101021465A CN 200710067546 CN200710067546A CN101021465A CN 101021465 A CN101021465 A CN 101021465A CN 200710067546 CN200710067546 CN 200710067546 CN 200710067546 A CN200710067546 A CN 200710067546A CN 101021465 A CN101021465 A CN 101021465A
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- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims abstract description 16
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 5
- 239000010935 stainless steel Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 54
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 13
- 238000011160 research Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 abstract 1
- 230000003628 erosive effect Effects 0.000 description 34
- 230000007797 corrosion Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
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- 238000005984 hydrogenation reaction Methods 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
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- 238000004088 simulation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004517 catalytic hydrocracking Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
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- 238000005303 weighing Methods 0.000 description 1
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Abstract
The invention discloses an experimental device of rotary single-phase flow washout. It contains lower fluid container, upper fluid container, transmission shaft, rotary disk, copper collar-carbon shoe, connecting axile bush, conversion electric engine, engineer controlling computer, Luggin capillary, potentiostat, working electrode and auxiliary electrode. Open four holes on side of rotary disk uniformly and cover a flat of stainless steel or platinum as auxiliary electrode. Utilize four wires through holes to converge on rotary disk and connects with copper collar-carbon shoe and potentiostat by central hole of transmission shaft. Working electrode is made of tested samples. Set cooling coil on lower fluid container to reduce medium temperature and recycle circuit outside upper fluid container to control working electrode temperature. It can simulate actual working condition in industrial environment and be applied in washout testing. It is used in safety researches of piping and tube bundle devices which are damaged by washout including invalidation, washout prediction, optimum design, risk check, safety evaluation and life-span prediction etc.
Description
Technical field
The present invention relates to erosion test device, specifically relate to be used for a kind of rotary single-phase flow wash-out testing device of commercial production.
Background technology
Fluid line is the special equipment of transporting fluid under certain pressure.Along with expanding economy, one of five big means of transportation that fluid line has become and highway, railway, water transport and aviation are arranged side by side are widely used in the conveying of various fluid foods in crude oil, rock gas, tap water, city liquefied gas and the process industry field.
Discover: it is various informative that pipeline lost efficacy, the mechanism complexity, as fault in material, burn into outside destroy etc., wherein the corrosion failure that causes of erosion attack be the most extensive in the piping system also be the common damage form.Erosion attack has tangible locality, sudden and risk, the special erosion perforation that causes under moisture, corrosivity, the effect of polyphasic flow media flow is complicated especially, be difficult to its generation of prediction, become the key technical problem of puzzlement fluid line safe operation.
In recent years, constantly increase in the processing ratio of petrochemical industry along with heavy, sulphur-bearing crude, the equipment of petrochemical industry pipeline and tube bank type (heat interchanger, air cooler etc.) erosion was lost efficacy comparatively common, example: the accident that hydrogenation reaction effluent air cooler (REAC) lost efficacy becomes increasingly conspicuous, become the major obstacle of serious restriction hydrocracking unit safety, stable, long-term operation, as not taking corresponding technical measures and countermeasure, China's oil refining industry will face the safety problem that more and more severeer equipment erosion was lost efficacy and device is produced.
The poor qualityization of at present domestic each factory and office of great oil refining reason crude oil is on the rise, and sulphur, nitrogen content increase in the crude oil, will certainly aggravate the corrosion of hydrogenation plant high-pressure air cooler system, and the generation meeting of accidents such as the inefficacy of expectation REAC system, unplanned shutdown is more outstanding.Although Chinese scholars has been carried out the correlative study of a large amount of REAC thrashing, carry out the research of decades and obtained certain achievement at the REAC system as mechanisms such as external NACE, UOP, API, but also do not had the reliable Forecasting Methodology of a cover to predict the erosion attack degree of the hydrogenation air-cooler system of processing sour crude up to now.
Erosion problem at present petrochemical complex, the existence of natural gas transport field, further study the erosion mechanism of pipeline, some scientific research institutions and universities and colleges have designed a series of erosion test device, study the erosion mechanism of pipeline by the experimental study means, in the hope of finding the critical flow velocity of pipeline erosion.But the some shortcomings part that present erosion test device exists mainly is:
(1) China is not deep enough to the mechanism research of erosion test at present, and the time of relevant device test is longer, and experimental result is difficult to promote engineering and uses.
(2) Chang Gui erosion test device is often by weighing or the method for thickness measuring is tested average erosion rate, can't realize the critical value that fluid erosion destroys and the testing research of transient response.
Summary of the invention
Deficiency at domestic and international erosion test device existence; the object of the present invention is to provide a kind of rotary single-phase flow wash-out testing device, be suitable for corroding and complete research systems such as the experimental study of the erosion mechanism of mobile coupling, fluid dynamic simulation analysis, diaphragm erosion attack critical characteristic or transient response and the popularization of erosion failure prediction commercial Application.Can simulate the actual working conditions in the industrial environment, in real time the erosion test device of test material erosion attack transient response and critical value.
In order to achieve the above object, the technical solution used in the present invention is: comprise following liquid container, last liquid container, transmission shaft, rotating circular disk, copper ring-carbon brush, connect axle sleeve, variable-frequency motor, industrial computer, Luggin capillary, potentiostat, working electrode and auxiliary electrode; Following liquid container connects by flange with last liquid container, and last liquid container lower flange is the blind flange structure, and dead eye is opened at the blind flange center, and periphery has through hole; The transmission shaft that has a center pit is inserted in the dead eye of lower flange lid from the blind flange centre bearing hole of last liquid container end face, transmission shaft and last the liquid container formation of blind flange centre bearing hole up and down are rotatably assorted, rotating circular disk is housed on the transmission shaft, measured workpiece is concordant with last liquid container internal face as the working electrode outside surface, working electrode center and rotating circular disk side coat the auxiliary electrode center of one deck stainless steel or platinum on same surface level, temperature sensor is equipped with in the opposed liquid container side of going up of working electrode, be positioned on the outer transmission shaft of liquid container end face blind flange copper ring-carbon brush is housed, transmission shaft connects with variable-frequency motor through connecting axle sleeve; The rotating circular disk side is perforate on 0 °, 90 °, 180 °, 270 ° position respectively, lead passes 0 °, 90 °, 180 °, 270 ° hole respectively and intersects at rotating circular disk and connect with copper ring-carbon brush with center transmission shaft hole one end, copper ring-carbon brush is through linking to each other with potentiostat by lead, and the lead other end connects with auxiliary electrode; The blind flange of last liquid container end face is opened the hole and is inserted Luggin capillary, links to each other with potentiostat; Potentiostat, variable-frequency motor and temperature sensor connect with industrial computer respectively; Following liquid container is communicated with by pump with last liquid container.
Distance between described working electrode and the Luggin capillary is not more than 0.5mm; Distance between working electrode and the auxiliary electrode is 8～10mm;
Arrange cooling coil in the described liquid container down.
The beneficial effect that the present invention has is: adopt the electro-chemical test system can realize the transient response test of erosion attack, comprise the critical characteristic of diaphragm erosion attack and surpass the later actual erosion rate of critical value.Adopt the frequency control rotary system can realize the critical characteristic test of the working electrode diaphragm erosion attack under the different rotating speeds.Adopt both-end to support and to realize high speed rotating.Can adopt actual corrosive medium and utilize temperature regulating and controlling system to carry out comparatively real actual working state simulation, the process of the test of erosion device is carried out the fluid dynamics simulation analysis; The analysis conclusion of test findings can be applied to engineering reality, promptly in conjunction with the simulation analysis of actual piping system, presses the position and the erosion rate of the regularity of distribution prediction erosion attack of associated fluid kinetic parameter.The present invention can simulate a series of actual engineering erosion inefficacy cases such as hydrogenation air cooling system tube bank, carries out the Study of Safety Control Technology of the pipeline such as inefficacy research, erosion prediction, optimal design, risk inspection, safety assessment and life prediction and the tube bank kind equipment of erosion attack.In addition, the present invention is simple in structure, is easy to promote.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a test specimen clamping synoptic diagram to be measured.
Fig. 3 is the A enlarged drawing of Fig. 1.
Among the figure: 1, following liquid container, 2, transmission shaft, 3, go up liquid container, 4, set nut, 5, pad, 6, pad, 7, copper ring-carbon brush, 8, connect axle sleeve, 9, variable-frequency motor, 10, rolling bearing, 11, industrial computer, 12, Luggin capillary, 13, Luggin capillary fixed mount, 14, rotating circular disk, 15, potentiostat, 16, working electrode, 17, auxiliary electrode, 18, cooling coil, 19, sliding bearing, 20, temperature sensor, 21, Luggin capillary cover plug.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, the present invention includes down liquid container 1, last liquid container 3, transmission shaft 2, rotating circular disk 14, copper ring-carbon brush 7, connection axle sleeve 8, variable-frequency motor 9, industrial computer 11, Luggin capillary 12, potentiostat 15, working electrode 16 and auxiliary electrode 17; Following liquid container 1 and last liquid container 3 connect by flange, and last liquid container 3 lower flanges are the blind flange structure, and dead eye is opened at the blind flange center, and periphery has through hole; The transmission shaft 2 that has a center pit is inserted in the dead eye of lower flange lid from the blind flange centre bearing hole of last liquid container 3 end faces, rotating circular disk 14 is fixed on the transmission shaft 2 by set nut 4 and pad 5,6, and the rolling bearing 10 of the flange of transmission shaft 2 and following liquid container 1, the sliding bearing 19 of going up 3 connecting flanges of liquid container and last liquid container 3 end faces forms and is rotatably assorted; Rotating circular disk 14 is housed on the transmission shaft 2, measured workpiece is concordant with last liquid container 3 internal faces as working electrode 16 outside surfaces, working electrode 16 centers and rotating circular disk 14 sides coat the auxiliary electrode center of one deck stainless steel or platinum on same surface level, temperature sensor 20 is equipped with in working electrode 16 opposed liquid container 3 sides of going up, be positioned on the outer transmission shaft 2 of liquid container 3 end face blind flanges copper ring-carbon brush 7 is housed, transmission shaft 2 connects with variable-frequency motor 9 through connecting axle sleeve 8; Rotating circular disk 14 sides are perforate on 0 °, 90 °, 180 °, 270 ° position respectively, lead passes 0 °, 90 °, 180 °, 270 ° hole respectively and intersects at rotating circular disk 14 and connect with copper ring-carbon brush 7 with transmission shaft 2 center pits one end, copper ring-carbon brush 7 is through linking to each other with potentiostat 15 by lead, and the lead other end connects with auxiliary electrode 17; Luggin capillary fixed mount 13 and Luggin capillary cover plug 21 link by welding, Luggin capillary 12 passes Luggin capillary fixed mount 13 and Luggin capillary cover plug 21 is gone up the liquid container 3 from the blind flange insertion that last liquid container 3 end faces have through hole, links to each other with potentiostat 15; Luggin capillary is fixed on fixed mount and Luggin capillary cover beyond the Great Wall earlier in the assembling process, again upper flange is covered, at last the Luggin capillary device is stretched in the container by the through hole on the blind flange; Potentiostat 15, variable-frequency motor 9 and temperature sensor 20 connect with industrial computer 11 respectively; Following liquid container 1 and last liquid container 3 are communicated with by pump.
As shown in Figure 2, described working electrode 16 is made of test specimen to be measured;
As shown in Figure 3, the distance between described working electrode 16 and the Luggin capillary 12 is not more than 0.5mm; Distance between working electrode 16 and the auxiliary electrode 17 is 8～10mm; As shown in Figure 1, described working electrode 16 centers and rotating circular disk 14 sides coat the auxiliary electrode center of one deck stainless steel or platinum on same surface level, temperature sensor 20 is equipped with in working electrode 16 opposed liquid container 3 sides of going up, and arranges cooling coil 18 in the following liquid container 1.
The course of work of the present invention is as follows:
Install erosion test device, with the sample of making be placed on center, rotating circular disk 14 side on 3 walls of liquid container on the same surface level.By the distance of fine thread adjusting working electrode 16, and must guarantee that working electrode 16 is not more than 0.5mm with the distance of Luggin capillary 12 with auxiliary electrode 17 and Luggin capillary 12.Introducing corrosive medium in the liquid container 1 down, liquid level must exceed rotating circular disk 14 and be 75mm.In static medium, working electrode 16 surface applications electrochemical methods are carried out pre-etching, make it form the corrosion product diaphragm of even compact, copper ring-carbon brush 7, working electrode 16, Luggin capillary 12 are linked to each other with potentiostat 15 (CHI660C) by lead; Potentiostat 15 is connected the storage data by USB interface with industrial computer 11; Industrial computer 11 links to each other with variable-frequency motor 9 by USB interface, and controls its rotating speed.Open water intaking valve, make in the cooling coil 18 to be full of chilled water, in order to the controlling liquid temperature; Connect liquid container 1 mouth of pipe and liquid container 3 mouths of pipe by pump, make the corrosive medium circulation, with the probe temperature of Control work electrode 16; Open variable-frequency motor 9, data such as industrial computer 11 collection corrosion currents, impedance, temperature, Ph value, rotating speed are carried out the current curve (impedance curve) under real-time analysis processing and the demonstration different rotating speeds; Under the situation that test specimen surface corrosion product diaphragm does not break through, potentiostat 15 current curve diagram electric currents almost nil (impedance is very big).The electric current that improves constantly the rotating speed observation potentiostat of variable-frequency motor 9 by industrial computer 11 changes (impedance variation), correlation curves such as real-time rendering rotating speed and corrosion current, rotating speed and impedance, rotating speed and corrosion rate.The rotating speed that slowly improves variable-frequency motor 9 is observed electric current (impedance) curvilinear motion of potentiostat 15; until undergoing mutation; can think that then test specimen corrosion product diaphragm breaks through, the critical characteristic that is washed and destroys then can obtain in the corrosion rate of specifying under the rotating speed if continue to improve rotating speed.
Claims (3)
1, rotary single-phase flow wash-out testing device is characterized in that: comprise following liquid container (1), last liquid container (3), transmission shaft (2), rotating circular disk (14), copper ring-carbon brush (7), connect axle sleeve (8), variable-frequency motor (9), industrial computer (11), Luggin capillary (12), potentiostat (15), working electrode (16) and auxiliary electrode (17).Following liquid container (1) connects by flange with last liquid container (3), and last liquid container (3) lower flange is the blind flange structure, and dead eye is opened at the blind flange center, and periphery has through hole; The transmission shaft (2) that has a center pit is inserted in the dead eye of lower flange lid from the blind flange centre bearing hole of last liquid container (3) end face, transmission shaft (2) and last liquid container (3) formation of blind flange centre bearing hole up and down are rotatably assorted, rotating circular disk (14) is housed on the transmission shaft (2), measured workpiece is concordant with last liquid container (3) internal face as working electrode (16) outside surface, working electrode (16) center and rotating circular disk (14) side coat the auxiliary electrode center of one deck stainless steel or platinum on same surface level, temperature sensor (20) is equipped with in opposed liquid container (3) side of going up of working electrode (16), be positioned on the outer transmission shaft (2) of liquid container (3) end face blind flange copper ring-carbon brush (7) is housed, transmission shaft (2) connects with variable-frequency motor (9) through connecting axle sleeve (8); The perforate on 0 °, 90 °, 180 °, 270 ° position respectively of rotating circular disk (14) side, lead passes 0 °, 90 °, 180 °, 270 ° hole respectively and intersects at rotating circular disk (14) and connect with copper ring-carbon brush (7) with transmission shaft (2) center pit one end, copper ring-carbon brush (7) is through linking to each other with potentiostat (15) by lead, and the lead other end connects with auxiliary electrode (17); The blind flange of last liquid container (3) end face is opened the hole and is inserted Luggin capillary (12), links to each other with potentiostat (15); Potentiostat (15), variable-frequency motor (9) and temperature sensor (20) connect with industrial computer (11) respectively; Following liquid container (1) is communicated with by pump with last liquid container (3).
2, rotary single-phase flow wash-out testing device according to claim 1 is characterized in that the distance between described working electrode (16) and the Luggin capillary (12) is not more than 0.5mm; Distance between working electrode (16) and the auxiliary electrode (17) is 8～10mm;
3, rotary single-phase flow wash-out testing device according to claim 1 is characterized in that: arrange cooling coil (18) in the described liquid container (1) down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100675469A CN100485360C (en) | 2007-03-09 | 2007-03-09 | Rotary single-phase flow wash-out testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100675469A CN100485360C (en) | 2007-03-09 | 2007-03-09 | Rotary single-phase flow wash-out testing device |
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| Publication Number | Publication Date |
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| CN101021465A true CN101021465A (en) | 2007-08-22 |
| CN100485360C CN100485360C (en) | 2009-05-06 |
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| CNB2007100675469A Expired - Fee Related CN100485360C (en) | 2007-03-09 | 2007-03-09 | Rotary single-phase flow wash-out testing device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969140A (en) * | 2014-05-06 | 2014-08-06 | 浙江理工大学 | Rotation type cavitation erosion and erosive wear synergistic testing apparatus |
| CN104266853B (en) * | 2014-08-07 | 2016-09-21 | 哈尔滨电机厂有限责任公司 | A kind of tubular turbine erosion model test method |
| CN106769583A (en) * | 2017-01-19 | 2017-05-31 | 北京科技大学 | A kind of rotary friction electrochemical testing device |
| CN107884333A (en) * | 2017-11-06 | 2018-04-06 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of device for being used to measure electrochemical parameter under metal cavitation corrosion state |
| CN108469390A (en) * | 2018-01-26 | 2018-08-31 | 浙江理工大学 | Detachable loop-type single-phase flow wash-out testing device |
| CN109871601A (en) * | 2019-01-30 | 2019-06-11 | 天津大学 | The method that the equal rotating disk electrode (r.d.e) equivalent simulation pipeline water flow of shearing stress moves state |
-
2007
- 2007-03-09 CN CNB2007100675469A patent/CN100485360C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969140A (en) * | 2014-05-06 | 2014-08-06 | 浙江理工大学 | Rotation type cavitation erosion and erosive wear synergistic testing apparatus |
| CN104266853B (en) * | 2014-08-07 | 2016-09-21 | 哈尔滨电机厂有限责任公司 | A kind of tubular turbine erosion model test method |
| CN106769583A (en) * | 2017-01-19 | 2017-05-31 | 北京科技大学 | A kind of rotary friction electrochemical testing device |
| CN106769583B (en) * | 2017-01-19 | 2023-06-23 | 北京科技大学 | Rotary friction electrochemical testing device |
| CN107884333A (en) * | 2017-11-06 | 2018-04-06 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of device for being used to measure electrochemical parameter under metal cavitation corrosion state |
| CN108469390A (en) * | 2018-01-26 | 2018-08-31 | 浙江理工大学 | Detachable loop-type single-phase flow wash-out testing device |
| CN109871601A (en) * | 2019-01-30 | 2019-06-11 | 天津大学 | The method that the equal rotating disk electrode (r.d.e) equivalent simulation pipeline water flow of shearing stress moves state |
| CN109871601B (en) * | 2019-01-30 | 2023-05-23 | 天津大学 | Method for equivalently simulating pipeline water flow state by using rotary disk electrodes with equal shear stress |
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| CN100485360C (en) | 2009-05-06 |
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Assignee: Hangzhou Furude Technology Co., Ltd. Assignor: Zhejiang Sci-Tech University Contract record no.: 2010330000849 Denomination of invention: Rotary single-phase flow wash-out testing device Granted publication date: 20090506 License type: Exclusive License Open date: 20070822 Record date: 20100512 |
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