CN209280533U - A kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision - Google Patents
A kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision Download PDFInfo
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- CN209280533U CN209280533U CN201822240782.2U CN201822240782U CN209280533U CN 209280533 U CN209280533 U CN 209280533U CN 201822240782 U CN201822240782 U CN 201822240782U CN 209280533 U CN209280533 U CN 209280533U
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Abstract
The utility model relates to a kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision, can be used for simulating is natural gas line, multiphase transportation pipeline, conveying CO2The tube inner corrosion situation in hypsography complex condition such as pipeline.A kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision, including pipe-line system and the dynamical system being separately connected with pipe-line system and pressure system；It is characterized by: the pipe-line system includes frame and the support of pipelines in frame, it is rotatablely connected between support of pipelines and frame；Support of pipelines is equipped with Rotary tray, and Rotary tray is equipped with experimental channel；Support of pipelines is connect by connecting rod with dynamical system；The experimental channel is connect with pressure system and temperature control system respectively；Experimental channel is equipped with corrosion rate detection device.The utility model is able to maintain longer test period, obtains the experimental data being consistent with pipeline scene.
Description
Technical field
The utility model relates to a kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision, can be used for simulating is day
Right feed channel, multiphase transportation pipeline, conveying CO2The tube inner corrosion situation in hypsography complex condition such as pipeline.
Background technique
During " 13 ", national product oil oil pipeline will increase to 3.3 ten thousand kilometers from existing 2.1 ten thousand kilometers, increase
Long 57%, natural gas line mileage will increase to 10.4 ten thousand kilometers from 6.4 ten thousand kilometers, improve 62.5%；Extend oil field oil pipeline
2000 kilometers or so will be increased to from existing 1700 kilometers, natural gas line mileage will increase to 2600 kilometers from 1800 kilometers
Left and right.Oil gas pipeline so in large scale, faces great security risk.
Extension oil field location is typical Loess Plateau Region, height above sea level 900m~1600m.Loess covers tens meters extremely
300 meters, time brings great changes to the world, long-term elemental erosion, forms the most plateau feature such as complicated mountain high, slope steep, plateau, beam, loess hills, ditch
Topography and geomorphology.Oil field location hypsography is larger, pipeline laying approach mountainous region, gully, river valley, village, forest land, farmland
Deng, cause extend the more difficult grasp of field area pipeline installation internal corrosion state, need be suitble to extend oil field lineament it is suitable
Evaluation method.
Recent years, low oil price trend is more and more obvious, and domestic oil enterprise mostly takes the counter-measure of cost efficiency, oil
Gas gathering line accounts for 35% or more of oil-gas field development cost, therefore, to reduce pipeline mileage, reduces oil vapor treatment unit, respectively
Big oil enterprise has attempted the conveying of wet gas pipeline multiphase on a large scale, reduces moisture processing section member；Oil-gas pipeline multi-phase mixed delivering, subtracts
Oil vapor treatment unit and pipeline mileage etc. are lacked.These new conveying techniques further increase the safety of oil gas pipeline
Therefore risk needs to establish under MODEL OVER COMPLEX TOPOGRAPHY, Multiphase Flow pipeline Evaluation of Internal Corrosion Degree method.
In multiphase flow internal corrosion research, circuit experiment can be good at simulating the flow regime of pipe stream, but be difficult to realize
The mould of the simulation of the factors such as operating pressure, temperature that multiphase flow pipeline internal corrosion is had a major impact or even some corrosive mediums
It is quasi- also to will receive limitation；Autoclave test can be good at simulating the factors such as conduit running pressure, temperature, corrosive medium to multiphase
The influence of pipeline corrosion is flowed, but cannot achieve the simulation of flox condition in pipe；Current electrochemistry experiment method, regardless of
It is that generic electrochemical experiment or microcell electrochemistry experiment are all difficult that the original appearance of multiphase flow pipeline internal corrosion is presented.Therefore it needs to set
Count a kind of comprehensive circuit experiment, autoclave test, electrochemistry experiment advantage high pressure Multiphase Flow fluctuating pipeline simulated experiment dress
It sets.
Summary of the invention
The utility model is intended in view of the above-mentioned problems, proposing a kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experiment dress
It sets, can be used for simulating is natural gas line, multiphase transportation pipeline, conveying CO2The pipe in hypsography complex condition such as pipeline
Internal corrosion situation.
The technical solution of the utility model is:
A kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision, including pipe-line system and with pipe-line system distinguish
The dynamical system and pressure system of connection；It is characterized by: the pipe-line system includes frame and the pipeline branch in frame
Frame is rotatablely connected between support of pipelines and frame；Support of pipelines is equipped with Rotary tray, and Rotary tray is equipped with experimental channel；
Support of pipelines is connect by connecting rod with dynamical system；The experimental channel is connect with pressure system and temperature control system respectively；
Experimental channel is equipped with corrosion rate detection device.
The dynamical system includes sequentially connected motor, speed reducer and rotation cam, is set on the cam surface of rotation cam
Hole；It is realized and is connected by connecting rod between described hole and support of pipelines.
The Rotary tray is the connecting rod that connection is realized on both sides arbitrarily parallel with support of pipelines, and connecting rod is at least 2；
Experimental channel is vertically arranged with connecting rod, and is fixedly connected with the connecting rod.
It further include the steel plate for being vertically arranged and connecting with connecting rod, steel plate two is connect with support of pipelines respectively；And on steel plate
Equipped with 3 circular holes.The cam surface of the rotation cam be equipped with off-axis heart different distance 3 holes, any hole with
It is connected between any circular hole by connecting rod, to be connected to dynamical system and pipe-line system.By changing circular hole and hole, pipeline system
The fluctuating inclination angle of system is different, and the connecting rod connection off-axis heart of hole is closer, and the vibration inclination angle of pipe-line system is smaller.Any adjustment motor turns
Speed provides power by connecting rod for pipeline attraction, it is ensured that this experimental provision can operate 5-10 days.
The pressure system includes sequentially connected pressure pipeline and bomb, and experimental channel connects pressure by needle valve
Pipeline connects bomb in turn.Required pressure and gas componant are provided for each experimental channel simultaneously, are in addition simultaneously each
Experimental channel letting nitrogen in and deoxidizing saves the experimental arrangement time；Guarantee that pressure condition is consistent in each experimental channel.
The temperature control system includes being successively set on temperature sensor and the heating tape of experimental channel outer surface, described
Heating tape is also connected with temperature control cabinet.Heating tape can be heated to 150 DEG C, and it is ± 1 DEG C that temperature control cabinet, which controls precision, thermometer
Range is 0-200 DEG C.
The experimental channel includes 8 metallic conduits, further includes comparison pipeline, and comparison pipeline is Lucite pipe；Gold
Metal conduit is consistent with Lucite pipe internal diameter, and is internally provided with the liquid water of same volume score；The corrosion rate inspection
Surveying device includes corrosion rate on-line monitoring system or corrosion coupon rate-measuring device；Wherein, on any one metallic conduit
Equipped with corrosion rate on-line monitoring system, remaining metallic conduit is equipped with corrosion coupon rate-measuring device, is contrasted.
The corrosion rate on-line monitoring system includes inductance Corrosion monitoring instrument or linear polarization Corrosion monitoring instrument.
The corrosion coupon rate-measuring device includes lacing film bracket and corrosion coupon, and the lacing film bracket is set by screw thread
It is placed in one end of experimental channel, each described lacing film bracket is equipped with 2 corrosion coupons.
The utility model has the technical effect that
1, autoclave test is compared, the utility model can be good at simulating the flow regime of pipe stream, including gas-liquid two-phase
Volume ratio, velocity in pipes, tube inner corrosion medium composition etc. influence the corrosion factor of pipeline internal corrosion；
2, field test is compared, the utility model can be good at simulating pipe stream operating condition, including pipeline performance pressure, pipeline
The parameter of the influence pipeline internal corrosion such as running temperature and pipeline undulation angle；
3, by the online Corrosion monitoring instrument on metallic conduit, the utility model being capable of the uniformly corruption of real-time monitoring pipeline inside
Rate and spot corrosion trend are lost, it is accurate to grasp pipeline internal corrosion dynamic；
4, because the corrosion test period is longer, generally have 30 days or so, the utility model can carry out 8 groups of experiments simultaneously, contracting
Short test period；
5, the utility model is able to maintain longer test period, obtains the experimental data being consistent with pipeline scene.
Detailed description of the invention
Fig. 1 is the utility model structure diagram.
Fig. 2 is the utility model Rotary tray schematic diagram.
Fig. 3 is the utility model pipe-line system and pressure system connection schematic diagram.
Fig. 4 is the connection schematic diagram of the utility model metallic conduit Yu corrosion rate on-line monitoring system.
Fig. 5 is the utility model Experiment Metal piping schematic.
Fig. 6 is the utility model steel plate schematic diagram.
Fig. 7 is the utility model shaft schematic diagram.
Fig. 8 is the utility model rotation cam schematic diagram.
Fig. 9 is the utility model connecting rod schematic diagram.
Figure 10 is the utility model experimental provision operation schematic diagram.
Detailed description of the invention: 1- frame；2- shaft；3- steel plate；4- support of pipelines；5- experimental channel；6- connecting rod；7- motor；8-
Speed reducer；9- rotation cam；12- bomb；13- pressure reducing valve, 10- Rotary tray.
Specific embodiment
A kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision, including pipe-line system and with pipe-line system distinguish
The dynamical system and pressure system of connection；The pipe-line system includes frame 1 and the support of pipelines 4 in frame 1, pipeline branch
It is rotatablely connected between frame 4 and frame 1 by shaft 2；Support of pipelines 4 is equipped with Rotary tray 10, and Rotary tray 10 is equipped with real
Test pipeline 5；Support of pipelines 4 is connect by connecting rod 6 with dynamical system；The experimental channel 5 respectively with pressure system and temperature control
System connection processed；Experimental channel 5 is equipped with corrosion rate detection device.
The dynamical system includes sequentially connected motor 7, speed reducer 8 and rotation cam 9, the cam surface of rotation cam 9
It is equipped with hole；Connection is realized by connecting rod 6 between described hole and support of pipelines 4.
The Rotary tray 10 is the connecting rod that connection is realized with any parallel both sides of support of pipelines 4, and connecting rod is 2；
Experimental channel 5 is vertically arranged with connecting rod, and is fixedly connected with the connecting rod.It further include the steel for being vertically arranged and connecting with connecting rod
Plate 3,3 liang of steel plate connect with support of pipelines 4 respectively；And steel plate 3 is equipped with 3 circular holes.It is set on the cam surface of the rotation cam 9
There are 3 holes of off-axis heart different distance, connected between any hole and any circular hole by connecting rod 6, so that connection is dynamic
Force system and pipe-line system.By changing circular hole and hole, the fluctuating inclination angle of pipe-line system is different, and it is off-axis that connecting rod 6 connects hole
The heart is closer, and the vibration inclination angle of pipe-line system is smaller.Any adjustment 7 revolving speed of motor provides power by connecting rod 6 for pipeline attraction,
Ensure that this experimental provision can operate 5-10 days.Revolving speed is 1700r/min in the present embodiment, and the reduction ratio of speed reducer 8 is 50:1.
The pressure system includes sequentially connected pressure pipeline and bomb 12, and experimental channel 5 is connected by needle valve
Pressure pipeline and then connection bomb 12.Required pressure and gas componant are provided for each experimental channel 5 simultaneously, in addition simultaneously
For each 5 letting nitrogen in and deoxidizing of experimental channel, the experimental arrangement time is saved；Guarantee that pressure condition is consistent in each experimental channel 5,
Maximum pressure is up to 5MPa.
The temperature control system includes being successively set on temperature sensor and the heating tape of 5 outer surface of experimental channel, institute
It states heating tape and is also connected with temperature control cabinet.Heating tape can be heated to 150 DEG C, and it is ± 1 DEG C that temperature control cabinet, which controls precision, temperature
Measuring journey is 0-200 DEG C.
The experimental channel 5 includes 8 metallic conduits, further includes comparison pipeline, and comparison pipeline is Lucite pipe；Gold
Metal conduit is consistent with Lucite pipe internal diameter, and is internally provided with the liquid water of same volume score；The corrosion rate inspection
Surveying device includes corrosion rate on-line monitoring system or corrosion coupon rate-measuring device；Wherein, on any one metallic conduit
Equipped with corrosion rate on-line monitoring system, remaining metallic conduit is equipped with corrosion coupon rate-measuring device, is contrasted.
The corrosion rate on-line monitoring system includes inductance Corrosion monitoring instrument or linear polarization Corrosion monitoring instrument.
The corrosion coupon rate-measuring device includes lacing film bracket and corrosion coupon, and the lacing film bracket is set by screw thread
It is placed in one end of experimental channel 5, each described lacing film bracket is equipped with 2 corrosion coupons.
8 metallic conduits of the present embodiment, 1 Lucite pipe, experimental channel 5 and comparison pipeline are evenly arranged in and turn
Dynamic 10 middle position of pallet pumps under the support of dynamical system with Rotary tray 10, as shown in Figure 10, main
It realizes:
1, by horizontality uniform rotation clockwise to the descending state for horizontal line being in the angle α, as shown in 1 in Figure 10；
2, by the descending state uniform rotation counterclockwise at the angle α to horizontality, as shown in 2 in Figure 10；
3, by horizontality uniform rotation counterclockwise to the upward slope state for horizontal line being in the angle α, as shown in 3 in Figure 10；
4, it by the upward slope state uniform rotation clockwise at the angle α to horizontality, as shown in 4 in Figure 10, so far completes primary
Complete operational process, heave simulate a true fluctuating pipeline in practical pipeline.
Assuming that including gas-liquid medium in experimental channel 5 and comparison pipeline；With bottom liquid in experimental channel 5 and comparison pipeline
It for research object, studies in the operational process as shown in 1 in Figure 10, bottom liquid can reach in experimental channel 5 and comparison pipeline
The maximum speed arrived.Liquid runs maximum distance s, i.e. experimental channel 5 and comparison duct length is 1m；The initial velocity v of liquid0
It is 0；Liquid runing time t, it is known that t=T/4, T indicate that experimental provision completes week time of primary complete operational process
Phase, the revolving speed of motor 7 is 1400 revs/min in experimental provision, and the reduction ratio of speed reducer 8 is 50:1, obtains high pressure fluctuating pipeline
Imitative experimental appliance completes period of time T=2.4-6s of primary complete operational process, and therefore, experimental provision completes such as Figure 10
In time of operational process shown in 1 be 0.6-1.5s；It is required that obtaining the attainable maximum speed v of bottom liquid institute, it is still necessary to
The acceleration a of liquid operation is known, from the above analysis it is recognised that experimental provision completes the operational process as shown in 1 in Figure 10
Middle acceleration a is always to change, and is the function of runing time t, i.e. a=f (t), according to mathematical knowledge, does not consider liquid in pipe
Interior friction effect, it is known that a=9.8sin (50t), 0 < t < 0.6-1.5s in formula.
It is about 0.18-0.45m/s according to the available attainable maximum speed of bottom liquid institute of above-mentioned analysis, it is contemplated that
Most of liquid still has the factors such as certain distance, actual experiment away from duct bottom in 5 tube wall frictional force of experimental channel and pipe
The attainable maximum speed of liquid institute can be less than 0.18-0.45m/s in pipeline 5, about in 0.15-0.4m/s or so.
The utility model need to carry out following test in initial operating stage:
(1) experimental channel 5 seals pressure maintaining experiment, turns the pressure to needed for testing of experimental channel 5 using bomb 12, keeps
One hour, if pressure remains unchanged, pressure maintaining Success in Experiment；
(2) pressure calibration is tested, and for the precision for guaranteeing imitative experimental appliance operating pressure, bomb 12 is provided with decompression
Valve 13 and pressure gauge, two stage pressure registrations guarantee pressure precision.It suppresses in pressure maintaining period, the pressure representative of observation experiment pipeline 5
Whether number is consistent with 13 registration of pressure reducing valve, if unanimously, marking pressure gauge；The maintenance and inspection pressure gauge if inconsistent, or more
Change pressure gauge；
(3) temperature calibration is tested, and for the precision for guaranteeing imitative experimental appliance operation temperature, guarantees temperature using temperature control cabinet
Precision is spent, and experimental temperature is arranged according to experimental program；
(4) indicia etched lacing film, including its size, weight, label, affiliated experimental channel 5；
(5) indicia etched medium finds out corrosive medium solubility before configuration, and corrosive medium needs configured in one piece, i.e., one
Same specification corrosive medium needed for secondary property configures；
(6) experimental channel 5 wraps up in deposited heating tape, flushes at heating tape end and lacing film bracket, to facilitate splendid attire corrosive medium；
Corrosive medium is packed into experimental channel 5 and comparison pipeline, and 5 volume of measurement experiment pipeline before dress contains corrosive medium according to volume；
(7) experimental channel 5 contains after corrosive medium terminates, and needs installing lacing film bracket and corrosion coupon, corrosion coupon
Bracket needs sealant to seal, and Sealing period 20 hours or more, in seal process, lacing film bracket end is kept to be in extreme higher position,
To guarantee that corrosion coupon is not corroded；
(8) after sealant consolidation, 2 hours of high pressure nitrogen are rushed into experimental channel 5, it is rear according to real with cleared oxygen
Proved recipe case fills CO into pipeline2Or other gases, until reaching requirement of experiment；
(9) after pressure requirements to be achieved, according to experimental program, temperature is arranged in the present embodiment.
Claims (10)
1. a kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision, including pipe-line system and connect respectively with pipe-line system
The dynamical system and pressure system connect；It is characterized by: the pipe-line system includes frame (1) and the pipe in frame (1)
Road bracket (4) is rotatablely connected between support of pipelines (4) and frame (1)；Support of pipelines (4) is equipped with Rotary tray (10), rotation
Pallet (10) is equipped with experimental channel (5)；Support of pipelines (4) is connect by connecting rod (6) with dynamical system；The experimental channel
(5) it is connect respectively with pressure system and temperature control system；Experimental channel (5) is equipped with corrosion rate detection device.
2. simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision according to claim 1, it is characterised in that: described
Dynamical system includes sequentially connected motor (7), speed reducer (8) and rotation cam (9), is set on the cam surface of rotation cam (9)
Hole；Connection is realized by connecting rod (6) between described hole and support of pipelines (4).
3. simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision according to claim 2, it is characterised in that: described
Rotary tray (10) is the connecting rod that connection is realized with any parallel both sides of support of pipelines (4), and connecting rod is at least 2；Experiment
Pipeline (5) is vertically arranged with connecting rod, and is fixedly connected with the connecting rod.
4. simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision according to claim 3, it is characterised in that: also wrap
The steel plate (3) for being vertically arranged and connecting with connecting rod is included, steel plate (3) two is connect with support of pipelines (4) respectively；And on steel plate (3)
Equipped with several circular holes.
5. simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision according to claim 4, it is characterised in that: described
The cam surface of rotation cam (9) is equipped with several holes of off-axis heart different distance, between any hole and any circular hole
It is connected by connecting rod (6), to be connected to dynamical system and pipe-line system.
6. simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision according to claim 5, it is characterised in that: described
Pressure system includes sequentially connected pressure pipeline and bomb (12), and experimental channel (5) connects pressure pipeline by needle valve
And then connect bomb (12).
7. simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision according to claim 6, it is characterised in that: described
Temperature control system includes being successively set on the temperature sensor and heating tape of experimental channel (5) outer surface, and the heating tape is also
It is connected with temperature control cabinet.
8. simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision according to claim 7, it is characterised in that: described
Experimental channel (5) includes 8 metallic conduits, further includes comparison pipeline, and comparison pipeline is Lucite pipe；Metallic conduit and have
Machine glass pipe internal diameter is consistent, and is internally provided with the liquid water of same volume score；The corrosion rate detection device includes
Corrosion rate on-line monitoring system or corrosion coupon rate-measuring device；Wherein, any one metallic conduit is equipped with corrosion speed
Rate on-line monitoring system, remaining metallic conduit are equipped with corrosion coupon rate-measuring device.
9. simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision according to claim 8, it is characterised in that: described
Corrosion rate on-line monitoring system includes inductance Corrosion monitoring instrument and linear polarization Corrosion monitoring instrument.
10. simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision according to claim 9, it is characterised in that: institute
Stating corrosion coupon rate-measuring device includes lacing film bracket and corrosion coupon, and the lacing film bracket is set to experiment tube by screw thread
The one end in road (5), each described lacing film bracket are equipped with 2 corrosion coupons.
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| CN201822240782.2U CN209280533U (en) | 2018-12-29 | 2018-12-29 | A kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632619A (en) * | 2018-12-29 | 2019-04-16 | 陕西延长石油(集团)有限责任公司研究院 | A kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision |
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2018
- 2018-12-29 CN CN201822240782.2U patent/CN209280533U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632619A (en) * | 2018-12-29 | 2019-04-16 | 陕西延长石油(集团)有限责任公司研究院 | A kind of simulated high-pressure Multiphase Flow fluctuating corrosion of piping experimental provision |
| CN109632619B (en) * | 2018-12-29 | 2023-09-29 | 陕西延长石油(集团)有限责任公司研究院 | Experimental device for simulating corrosion of high-pressure multiphase flow fluctuation pipeline |
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