CN109668824A - Simulate the high speed humidity corrosion loop experimental provision of natural gas line internal corrosion environment - Google Patents
Simulate the high speed humidity corrosion loop experimental provision of natural gas line internal corrosion environment Download PDFInfo
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- 238000005260 corrosion Methods 0.000 title claims abstract description 105
- 230000007797 corrosion Effects 0.000 title claims abstract description 105
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000003345 natural gas Substances 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 62
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 238000002474 experimental method Methods 0.000 claims abstract description 32
- 239000000523 sample Substances 0.000 claims abstract description 29
- 239000012071 phase Substances 0.000 claims abstract description 20
- 239000002699 waste material Substances 0.000 claims abstract description 17
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000000840 electrochemical analysis Methods 0.000 claims abstract description 7
- 239000007791 liquid phase Substances 0.000 claims abstract description 6
- 238000009413 insulation Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 68
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 15
- 238000004088 simulation Methods 0.000 claims description 14
- 239000002912 waste gas Substances 0.000 claims description 11
- 230000005518 electrochemistry Effects 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 6
- 229910052753 mercury Inorganic materials 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 claims description 5
- 244000137852 Petrea volubilis Species 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000006392 deoxygenation reaction Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 238000011160 research Methods 0.000 abstract description 9
- 230000007246 mechanism Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000011156 evaluation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000009533 lab test Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 150000002730 mercury Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 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
- G01N17/04—Corrosion probes
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Abstract
The present invention provides a kind of high speed humidity corrosion loop experimental provision for simulating natural gas line internal corrosion environment, belongs to corrosion test technique field.The device includes deaerating type of cycles, external air supply system, the gas phase circulatory system, liquid phase loading system, outer connected control system, heat insulation system, experiment test system, waste liquid exhaust treatment system etc..The advantages of device is can to simulate the conditions such as natural gas line interior media fluidised form, flow velocity, pressure, temperature, low-water-content, high gas phase flow velocity, high boundary shear stress operating condition corrosive environment are reproduced to greatest extent, corrosion behavior research can be carried out by inductance probe, electro-chemical test, corrosion coupon and corrosion inhibiter is evaluated, be of great significance to the means of defences application such as the corrosion mechanism research of natural gas line and corrosion inhibiter.
Description
Technical field
The present invention relates to corrosion test technique fields, particularly relate to a kind of high speed for simulating natural gas line internal corrosion environment
Humidity corrosion loop experimental provision.
Background technique
In recent years, with the continuous development of industrial gas oil, the etching problem of oil-gas pipeline increasingly causes people's
Concern, in particular with the exploitation of deepwater field, corrosive conditions are inside accurate simulation natural gas line so as to science progress
Selection and corrosion inhibiter application become one of the difficult point of engineering practice and research.It is higher for deep-sea natural gas line corrosion risk
The characteristics of, there are many methods at present evaluates for corrosive environment simulation and corrosion inhibiter, but natural gas line inner high speed moisture
The corrosion simulated still great challenge of operating condition, most laboratory still use rotating disk electrode (r.d.e) (RCE), reaction kettle, Impact Sputtering method
The methods of or device carry out Dynamic Corrosion simulation or corrosion inhibiter evaluation.Wherein rotating disk electrode (r.d.e) (RCE) by middle and slow speed of revolution and
The mode of electro-chemical test characterizes corrosion inhibiter effect, it is difficult to high gas phase flow velocity, high boundary shear stress operating condition in true reflection pipeline,
Often there is gap in experimental data and actual conditions, be only applicable to inhibition mechanism research.Impact Sputtering method is suitable for pure liquid phase item
Strong erosion under part, simulation whole water phase operating condition, but the higher natural gas line work of and gas phase flow velocity lower for moisture content
Condition, it is difficult to simulate actual condition with whole water phase erosion, be only applicable to influence of the Simulation high shear force to corrosion inhibiter.Therefore,
Simulated experiment loop is established, more precisely simulation flowing corrosive conditions, is that natural gas line high speed humidity corrosion experiment is gentle
Lose the important channel of agent evaluation.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of high speed moisture for simulating natural gas line internal corrosion environment is rotten
Loop experimental provision is lost, researching natural gas pipeline is come under low-water-content, high gas phase flow velocity, high boundary shear stress operating condition with this
The problem of corrosion simulated experiment and corrosion inhibiter evaluation.
The device includes deaerating type of cycles, external air supply system, the gas phase circulatory system, liquid phase loading system, external control system
System, heat insulation system, experiment test system and waste liquid exhaust treatment system；Wherein, deaerating type of cycles includes high pressure gas cylinder A, subtracts
Pressure valve, vacuum pump, external air supply system include high pressure gas cylinder B, pressure reducing valve, surge tank, the gas phase circulatory system include circulating fan,
Gas flowmeter, gas-liquid separation tower and each section of pipeline, liquid phase loading system include water tank, medicine-chest, plunger metering water pump A, plunger
Measure water pump B, plunger metering Teat pipette A, plunger metering Teat pipette B and blender, outer connected control system include liquidometer, controller,
Electrical ball valve, heat insulation system include heating device A, heating device B, water circulating pump, temperature sensor, experiment test system
Including corrosion probe, corrosion electrochemistry probe, corrosion coupon interface arrangement, window, waste liquid exhaust treatment system includes waste liquid
Collecting box, waste gas collection box and filter diffuse piping；
High pressure gas cylinder A is connected and pressure reducing valve, water tank is arranged in the management of high pressure gas cylinder A by piping connection water tank and medicine-chest
Controller is connected, water tank lower part connects plunger metering water pump A and plunger measures water pump B, and blender, medicine is arranged in water tank and medicine-chest
Lower box part connects plunger metering Teat pipette A and plunger measures Teat pipette B, is surrounded by heating device A outside water tank and medicine-chest；Gas-liquid separation tower
By piping connection waste liquid collecting box, connects and electrical ball valve is set on the pipeline of waste liquid collecting box, connection plunger metering water pump A,
Plunger measures setting surge tank, circulating fan, gas on the main line of water pump B, plunger metering Teat pipette A and plunger metering Teat pipette B
Flowmeter and vacuum pump, surge tank connect high pressure gas cylinder B, and pressure transmitter is arranged on surge tank, and gas-liquid separation tower connects liquid level
Meter, experiment pipeline section connect in main line, and experiment pipeline section connects water circulating pump, test and check-valves is arranged between pipeline section and main line,
Temperature sensor is set between the experiment gentle liquid knockout tower of pipeline section, experiment pipe section exterior is surrounded by heating device B, heating device B with
Water circulating pump is connected, and experiment pipeline section includes corrosion probe, corrosion electrochemistry probe, corrosion coupon interface arrangement and window, master
Needle-valve is set on the pipeline between pipeline and waste gas collection box and filter diffuses piping.
The loop experimental provision is passed through high pressure N2And it is removed in the way of vacuum pump extraction cyclic system inner air
Oxygen.
It is connected through a screw thread between the high pressure gas cylinder B and pressure reducing valve air inlet of external air supply system, external air supply system is defeated
Experimental gas out enters surge tank by gas-guide tube after pressure reducing valve pressure control, and pressure transmitter, experiment dress are housed on surge tank
Pressure is set to be monitored by pressure transmitter.
Circulating fan controls gas phase flow velocity, and circulating fan is connected with gas flowmeter, real-time monitoring gas phase flow velocity.
Water tank and gas-liquid separation tower are connected with liquidometer, controller and electrical ball valve, are used for real-time monitoring water level.
Plunger measures water pump A, plunger metering water pump B is respectively 0.1~25L/h variable frequency adjustment and 1~800L/h frequency conversion tune
Section；The plunger metering Teat pipette A, metering plunger Teat pipette B are respectively 0.1~25L/h variable frequency adjustment and 1~800L/h frequency conversion tune
Section.
Corrosion electrochemistry probe is separately connected saturation mercury reference electrode, working electrode and auxiliary electrode, by packaged examination
Sample is polished smooth with sand paper, is made to be saturated at mercury reference electrode, working electrode and auxiliary electrode in the same plane, then be passed through
Conducting wire is connect with external electrochemical workstation, carries out electro-chemical test, and external electrochemical workstation connects computer and carries out data
Output, record and analysis processing.
Corrosion coupon interface arrangement has 3~5, can be used for parallel laboratory test, reduces experimental error；Window is quartzy glass
Glass.
The main structure material of the loop experimental provision is 316L stainless steel, and wherein pipe section is always about 12m, bore
For 50mm.
Experimental channel both ends are connect with check-valves, and experiment circuit design has high voltage bearing quartz glass transparent window, can
Observe Flow Corrosion process.Moisture temperature and the inside and outside wall temperature of pipe can be monitored by temperature sensor in experiment pipeline section, be passed through
Gas-liquid separation tower isolates gas and liquid, and wherein gas is used by looped cycle, and liquid is then expelled directly out cyclic system, keeps away
Exempt from circuit and blower is in multiphase flow working condition.The filter release piping is connect with waste gas collection box, and each section of pipeline is equal
Equipped with needle-valve.The present apparatus is equipped with waste liquid collecting box and waste gas collection box, contained corrosion inhibiter pollution environment in medium is avoided, to reach
The effect of environmental protection.
The advantageous effects of the above technical solutions of the present invention are as follows:
1. strong operability, long service life, it is adaptable, gear to actual circumstances, compensate for traditional corrosion simulated and corrosion inhibiter
The shortcomings that evaluation study method is unable to satisfy actual condition.
2. this device can simulate the conditions such as fluidised form, flow velocity, pressure, the temperature of natural gas line internal flow medium, most
Limits reproduce low-water-content, high gas phase flow velocity, high boundary shear stress operating condition corrosive environment, it is hereby achieved that more close real
The data of border corrosive conditions provide hardware condition for the corrosion research of natural gas line and corrosion inhibiter evaluation.
3. the present apparatus can pass through simultaneously inductance probe, electro-chemical test, corrosion coupon to the corrosion behavior of pipe line steel into
Row real-time monitoring: by corrosion probe real-time detection corrosion rate, reaction is fast, precision is high, sensitivity is good；Electro-chemical test is convenient
The research of corrosion mechanism；Its corrosion rate is calculated by the corrosion weight loss situation of sample after corrosion coupon corrosion some cycles, is led to
Cross the corrosion mechanism etc. of the erosion profile research pipe line steel in specimen surface and section, be natural gas line corrosion mechanism research with
Corrosion inhibiter evaluation lays the foundation.
Detailed description of the invention
Fig. 1 is that the high speed humidity corrosion loop experimental provision structure of simulation natural gas line internal corrosion environment of the invention is shown
It is intended to.
Wherein: 1- high pressure gas cylinder A；2- pressure reducing valve；3- waste liquid collecting box；4- vacuum pump；5- high pressure gas cylinder B；6- surge tank；
7- pressure transmitter；8- circulating fan；9- gas flowmeter；10- controller；11- liquidometer；12- electrical ball valve；13- water tank；
14- plunger measures water pump A；15- plunger measures water pump B；16- plunger measures Teat pipette A；17- plunger measures Teat pipette B；18- medicine-chest；
19- heating device A；20- blender；21- water circulating pump；22- check-valves；23- heating device B；24- corrosion probe；25- corrosion
Electrochemical probe；26- corrosion coupon interface arrangement；27- window；28- temperature sensor；29- gas-liquid separation tower；30- needle-valve；
31- filter diffuses piping；32- waste gas collection box.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of high speed humidity corrosion loop experimental provision for simulating natural gas line internal corrosion environment.
As shown in Figure 1, device mesohigh gas cylinder A1 connects high pressure gas cylinder A1 by piping connection water tank 13 and medicine-chest 18
Management on pressure reducing valve 2 is set, water tank 13 connects controller 10, and 13 lower part of water tank connects plunger metering water pump A14 and plunger meter
Water pump B15 is measured, blender 20 is set in water tank 13 and medicine-chest 18,18 lower part of medicine-chest connects plunger metering Teat pipette A16 and plunger meter
Teat pipette B17 is measured, is surrounded by heating device A19 outside water tank 13 and medicine-chest 18；Gas-liquid separation tower 29 passes through piping connection waste collection
Case 3 connects and electrical ball valve 12 is arranged on the pipeline of waste liquid collecting box 3, and connection plunger metering water pump A14, plunger measure water pump
Surge tank 6, circulating fan 8, gas flow are set on the main line of B15, plunger metering Teat pipette A16 and plunger metering Teat pipette B17
Meter 9 and vacuum pump 4, surge tank 6 connect high pressure gas cylinder B5, pressure transmitter 7 are arranged on surge tank 6, and gas-liquid separation tower 29 connects
Liquidometer 11, experiment pipeline section connect in main line, and experiment pipeline section connects water circulating pump 21, test and are arranged between pipeline section and main line
Check-valves 22 tests and temperature sensor 28 is arranged between the gentle liquid knockout tower 29 of pipeline section, and experiment pipe section exterior is surrounded by heating device
B23, heating device B23 are connected with water circulating pump 21, and experiment pipeline section includes corrosion probe 24, corrosion electrochemistry probe 25, corrosion
Lacing film interface arrangement 26 and window 27 are arranged needle-valve 30 on the pipeline between main line and waste gas collection box 32 and filter are put
Separate tube is 31.
Loop is with being passed through high pressure N2And deoxygenation is carried out in the way of the extraction cyclic system inner air of vacuum pump 4.It is described
It is connected through a screw thread between external air supply system high pressure gas cylinder B5 and pressure reducing valve air inlet, the experiment gas of external air supply system output
Body enters surge tank 6 by gas-guide tube after pressure reducing valve pressure control, acts on and entering in system after being buffered by it, and is entire
Loop experiment provides pressure, pressure transmitter 7 is housed on surge tank, system pressure can be monitored by pressure transmitter.
Circulating fan 8 controls gas phase flow velocity, is connected with gas flowmeter 9, real-time monitoring gas phase flow velocity.The water tank 13
With gas-liquid separation tower 29 with liquidometer 11, controller 10 is connected with electrical ball valve 12, for real-time monitoring water level.13 He of water tank
Blender 20 is provided in medicine-chest 18, to keep the uniformity of solution and medical fluid；Connect with plunger metering pump under water tank and medicine-chest
It connects, moisture content and pharmaceutical quantities can adjust adding amount by plunger metering pump to control.The plunger measures water pump A14, plunger
Metering water pump B15 is respectively 0.1~25L/h variable frequency adjustment and 1~800L/h variable frequency adjustment, contains liquid to more precisely control
Amount；The plunger metering Teat pipette A17, plunger metering Teat pipette B18 are respectively 0.1~25L/h variable frequency adjustment and 1~800L/h frequency conversion
It adjusts, the plunger metering pump of more appropriate range can be selected, according to actual dose adding amount to improve dosing precision.The heating
Device A19 is placed on the outside of water tank and medicine-chest, and heating device B23 is placed on the outside of experiment pipeline section, and is connected with water circulating pump 21, can be led to
Enter to recycle water management temperature.
The main structure material of the moisture loop is 316L stainless steel, and wherein pipe section is always about 12m, and bore is
50mm.The corrosion electrochemistry probe is separately connected saturation mercury reference electrode, working electrode and auxiliary electrode, by packaged examination
Sample is polished smooth with sand paper, is made at three electrodes in the same plane, is then connect by conducting wire with external electrochemical workstation,
Electro-chemical test is carried out, external electrochemical workstation connects computer and carries out data output, record and analysis processing.The experiment
Pipeline is equipped with 3~5 corrosion coupon interface arrangements, can be used for parallel laboratory test, reduces experimental error.
Experimental channel both ends are connect with check-valves 22, and experiment circuit design has high voltage bearing quartz glass transparent window 27,
Flow Corrosion process can be observed.Moisture temperature and the inside and outside wall temperature of pipe can be supervised by temperature sensor 28 in experiment pipeline section
It surveys, isolates gas and liquid through gas-liquid separation tower 29, wherein gas is used by looped cycle, and liquid is then expelled directly out loop
System avoids circuit and blower from being in multiphase flow working condition.The filter release piping 31 is connect with waste gas collection box 32,
Each section of pipeline is provided with needle-valve 30.The present apparatus is equipped with waste liquid collecting box 3 and waste gas collection box 32, avoids contained corrosion inhibiter in medium
Environment is polluted, to achieve the effect that environmental protection.
Using the present invention under natural gas pipeline low-water-content, high gas phase flow velocity, high boundary shear stress moisture operating condition
The evaluation of corrosion simulated and corrosion inhibiter tested, experimentation is as follows:
Step 1: in application process, three-electrode system sample is first prepared, by working electrode, is saturated mercury reference electrode,
Auxiliary electrode epoxy resin, two rouge of dibutyl phthalate second, ethylenediamine according to the ratio mixed preparing of 100:10:7 and
At epoxy packages in fixture, with after liquid honing to 800# use alcohol washes, dried up after acetone oil removing spare；
Step 2: electrochemical sample being packed into experimental channel top sample card slot, and in the corrosion coupon interface of experimental section
Device 26 is packed into lacing film sample；
Step 3: enough simulated solutions are filled in loop water tank 13, and enough corrosion inhibiter are filled in medicine-chest 18, wherein
Water tank, which is externally provided with control system, can observe liquid level, and blender 20 is provided in water tank and medicine-chest, keep solution and corrosion inhibiter
Uniformly；
Step 4: closing all valves, and be persistently slowly introducing ultrapure N2Gas deoxygenation for 24 hours, recycles vacuum pump 4 by ring
The extraction of road internal system air, repeats and " is passed through N2, vacuumize " and step 5 time, to guarantee anaerobic in loop；
Step 5: opening high pressure gas cylinder pressure reducing valve 5, close other all valves according to experiment parameter and be passed through CO2(or CO2+
N2) gas, so that system pressure is reached predetermined pressure；Water pump 14 or 15 is measured by plunger and plunger measures Teat pipette 16 or 17 and distinguishes
It is pumped into solution and corrosion inhibiter to be sufficiently mixed with high pressure gas, is then driven using circulating fan 8, pass through the rotational speed regulation gas of blower
Phase flow velocity, and by 9 real-time monitoring of gas flowmeter, so that moisture is passed through experiment segment pipe；
Step 6: by 24 real-time detection corrosion rate of corrosion probe, reaction is fast, precision is high, sensitivity is good；Corrosion electrification
It learns probe 25 and is separately connected saturation mercury reference electrode, working electrode and auxiliary electrode, by packaged sample sand paper polishing light
It is sliding, make at three electrodes in the same plane, then connect by conducting wire with external electrochemical workstation, carries out electrochemistry survey
Examination, external electrochemical workstation, which connects computer progress data output, record and analysis processing, corrosion coupon, can pass through corrosion
The corrosion weight loss situation of sample calculates its corrosion rate after some cycles, is managed by the erosion profile research in specimen surface and section
The corrosion mechanism etc. of line steel；
Step 7: interior media flow regime being observed by window 27 in experimentation, is carried out by temperature sensor 28
Moisture temperature and the inside and outside wall temperature of pipe in monitoring experiment pipeline section；
Step 8: isolating gas and liquid through gas-liquid separation tower 29, accumulation of fluid to liquidometer 11 sets liquid level, passes through
Control system electrical ball valve 12 opens automatic drain, and wherein gas is used by looped cycle, and liquid is then immediately discharged to waste liquid
Cyclic system is discharged in collecting box 3, circuit and blower is avoided to be in multiphase flow working condition；Filter can be passed through to the end of testing
It diffuses piping 31 and exhaust gas is discharged in waste gas collection box 32.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of high speed humidity corrosion loop experimental provision for simulating natural gas line internal corrosion environment, it is characterised in that: including
Deaerating type of cycles, external air supply system, the gas phase circulatory system, liquid phase loading system, outer connected control system, heat insulation system, reality
Test test system and waste liquid exhaust treatment system；Wherein, deaerating type of cycles includes high pressure gas cylinder A (1), pressure reducing valve (2), vacuum pump
(4), external air supply system includes high pressure gas cylinder B (5), pressure reducing valve, surge tank (6), and the gas phase circulatory system includes circulating fan
(8), gas flowmeter (9), gas-liquid separation tower (29) and each section of pipeline, liquid phase loading system include water tank (13), medicine-chest (18),
Plunger measures water pump A (14), plunger metering water pump B (15), plunger metering Teat pipette A (16), plunger metering Teat pipette B (17) and stirs
Device (20), outer connected control system include liquidometer (11), controller (10), electrical ball valve (12), and heat insulation system includes adding
Thermal A (19), heating device B (23), water circulating pump (21), temperature sensor (28), experiment test system include that corrosion is visited
Needle (24), corrosion electrochemistry probe (25), corrosion coupon interface arrangement (26), window (27), waste liquid exhaust treatment system packet
Include waste liquid collecting box (3), waste gas collection box (32) and filter release piping (31)；
High pressure gas cylinder A (1) passes through piping connection water tank (13) and medicine-chest (18), is arranged in the management of connection high pressure gas cylinder A (1) and subtracts
Pressure valve (2), water tank (13) connect controller (10), and water tank (13) lower part connects plunger metering water pump A (14) and plunger measures water
It pumps B (15), blender (20) is set in water tank (13) and medicine-chest (18), medicine-chest (18) lower part connects plunger metering Teat pipette A (16)
Teat pipette B (17) are measured with plunger, are surrounded by heating device A (19) outside water tank (13) and medicine-chest (18)；Gas-liquid separation tower (29) is logical
It crosses piping connection waste liquid collecting box (3), connects and electrical ball valve (12) are set on the pipeline of waste liquid collecting box (3), connect plunger meter
On the main line for measuring water pump A (14), plunger metering water pump B (15), plunger metering Teat pipette A (16) and plunger metering Teat pipette B (17)
Surge tank (6), circulating fan (8), gas flowmeter (9) and vacuum pump (4) are set, surge tank (6) connects high pressure gas cylinder B (5),
Pressure transmitter (7) are set on surge tank (6), gas-liquid separation tower (29) connects liquidometer (11), and experiment pipeline section connects in main line
In, experiment pipeline section connection water circulating pump (21) tests and check-valves (22) is arranged between pipeline section and main line, tests the gentle liquid of pipeline section
Temperature sensor (28) are set between knockout tower (29), experiment pipe section exterior is surrounded by heating device B (23), heating device B (23)
It is connected with water circulating pump (21), experiment pipeline section includes corrosion probe (24), corrosion electrochemistry probe (25), corrosion coupon interface dress
(26) and window (27) are set, needle-valve (30) and filter release are set on the pipeline between main line and waste gas collection box (32)
Piping (31).
2. the high speed humidity corrosion loop experimental provision of simulation natural gas line internal corrosion environment according to claim 1,
It is characterized by: the loop experimental provision is passed through high pressure N2And in the way of vacuum pump (4) extraction cyclic system inner air
Carry out deoxygenation.
3. the high speed humidity corrosion loop experimental provision of simulation natural gas line internal corrosion environment according to claim 1,
It is characterized by: be connected through a screw thread between the high pressure gas cylinder B (5) and pressure reducing valve air inlet of the external air supply system, it is external
The experimental gas of air supply system output, is entered surge tank (6) after pressure reducing valve pressure control by gas-guide tube, surge tank is equipped on (6)
Pressure transmitter (7), experimental provision pressure are monitored by pressure transmitter (7).
4. the high speed humidity corrosion loop experimental provision of simulation natural gas line internal corrosion environment according to claim 1,
It is characterized by: the circulating fan (8) controls gas phase flow velocity, circulating fan (8) is connected with gas flowmeter (9), supervises in real time
Survey gas phase flow velocity.
5. the high speed humidity corrosion loop experimental provision of simulation natural gas line internal corrosion environment according to claim 1,
It is characterized by: the water tank (13) and gas-liquid separation tower (29) with liquidometer (11), controller (10) and electrical ball valve
(12) it is connected, is used for real-time monitoring water level.
6. the high speed humidity corrosion loop experimental provision of simulation natural gas line internal corrosion environment according to claim 1,
It is characterized by: plunger metering water pump A (14), plunger metering water pump B (15) are respectively 0.1~25L/h variable frequency adjustment and 1
~800L/h variable frequency adjustment；Plunger metering Teat pipette A (16), metering plunger Teat pipette B (17) are respectively 0.1~25L/h frequency conversion
It adjusts and 1~800L/h variable frequency adjustment.
7. the high speed humidity corrosion loop experimental provision of simulation natural gas line internal corrosion environment according to claim 1,
It is characterized by: the corrosion electrochemistry probe (25) is separately connected saturation mercury reference electrode, working electrode and auxiliary electrode, it will
Packaged sample is polished smooth with sand paper, and saturation mercury reference electrode, working electrode and auxiliary electrode is made to be in approximately the same plane
On, it is then connect by conducting wire with external electrochemical workstation, carries out electro-chemical test, external electrochemical workstation, which is connected, to be calculated
Machine carries out data output, record and analysis processing.
8. the high speed humidity corrosion loop experimental provision of simulation natural gas line internal corrosion environment according to claim 1,
It is characterized by: the corrosion coupon interface arrangement (26) has 3~5, window (27) is quartz glass.
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