CN107796749A - A kind of corrosion inhibiter preferably and antiseptic effect evaluation experimental device and method - Google Patents
A kind of corrosion inhibiter preferably and antiseptic effect evaluation experimental device and method Download PDFInfo
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- CN107796749A CN107796749A CN201711015621.7A CN201711015621A CN107796749A CN 107796749 A CN107796749 A CN 107796749A CN 201711015621 A CN201711015621 A CN 201711015621A CN 107796749 A CN107796749 A CN 107796749A
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Abstract
The present invention relates to a kind of corrosion inhibiter preferably and antiseptic effect evaluation experimental device and method, belong to Oil and Natural Gas Engineering technical field, by establishing field test device, design control group trial zone, corrosion test area etc., simulate acid gas field gathering system operating mode, carry out corrosion inhibiter preferably, the evaluation of inhibitor film persistence, anti-corrosion effect assessment, corrosion inhibiter and methanol Study on compatibility etc. test, be preferably applied to the corrosion inhibiter of live actual condition.Pre- membranous system is designed, treating pre- membrane tube line in laboratory by prefilmer carries out film, makes pre- membrane tube line inwall inhibitor film thickness uniform；Corrosion rate detection method is designed, is used in combination by weight-loss method and dichloromethane solution ablution, evaluates the corrosion mitigating effect of corrosion inhibiter.By a kind of corrosion inhibiter provided by the invention preferably and antiseptic effect evaluation experimental device and method, it can evaluate, preferred corrosion inhibiter, improve anti-corrosion effect.
Description
Technical field
The present invention relates to a kind of corrosion inhibiter preferably and antiseptic effect evaluation experimental device and method, belong to oil and gas
Field of engineering technology.
Background technology
China's acid gas field is high to contain H2S、CO2, etching problem is very prominent in development process.Gas field corrosion protection technique skill
Art is included using corrosion resistant material, erosion shield, filling corrosion inhibiter and cathodic protection etc..The corrosion control side of the pre- film of corrosion inhibiter
Method has the advantages of small investment, favorable anti-corrosion effect, is widely applied.High Sulfurous Gas Fields Development still belongs to a small number of in China, lacks
Weary corresponding corrosion inhibiter evaluation, method for optimizing and standard, in order to improve corrosion inhibiter inhibition efficiency, improve gas field gathering line anti-corrosion
Effect, it is necessary to corrosion inhibiter preferably, antiseptic effect evaluation etc. carry out theoretical research and verification experimental verification.
The corrosion inhibiter carried out in traditional experiment room is evaluated, optimization experiment can not simulate the Real Flow Field of corrosion inhibiter in the duct
State, experimental result is not necessarily close to actual working conditions.Patent CN201611224268.9 discloses a kind of evaluation corrosion inhibiter
The method of inhibition efficiency, it is real using gas well or the corrosive conditions parameter in gas field, design corrosion inhibiter evaluation according to corrosion inhibiter plan is collected
One kind in the experiment parameters such as the experimental temperature tested, pressure, corrosive medium partial pressure, corrosive medium flow velocity, corrosion inhibiter filling concentration
Or several combinations, carry out corrosion inhibiter evaluation experimental, and experimental result is handled, evaluate corrosion inhibiter inhibition efficiency.Patent
CN201620832592.8 discloses a kind of indoor corrosion inhibiter evaluation novel test device, by setting hydro-thermal to close in oil bath pan
Into reactor support, support is provided with hook, is provided with oil bath pan cover outside oil bath pan, during corrosion inhibiter evaluation experimental, oil bath
Smell will not shed.Patent CN201710021368.X discloses a kind of evaluation method of crude oil gathering system corrosion inhibiter, passes through
Water-in-oil system in crude oil gathering system is determined, to the transformation temperature of oil-in-water system, to obtain crude oil gathering system and occur compared with deep-etching
When viscosity rapid drawdown moisture content, corrosion inhibiter henchnmrk test is carried out using moisture content during viscosity rapid drawdown and is used as live corrosion inhibiter
Fill index.Patent CN201420453175.3 discloses a kind of buffering agent evaluation apparatus containing corrosive dissolution gas medium,
The buffering agent evaluation apparatus for containing corrosive dissolution gas medium under ambient condition while can screen the multiple models of contrast at the scene
Corrosion inhibiter and its different chemical feeding quantities under corrosion inhibiter evaluation.Above-mentioned Lab-evaluation has experimental condition can be with the excellent of flexible modulation
Point, even if but from field sampling in experimentation, because Korrosionsmedium can be gradually consumed, interior is also difficult to simulation and showed
Field actual conditions are identical, and particularly the test(ing) medium containing corrosive gas is more difficult to simulate.
Therefore, the present invention by design a kind of corrosion inhibiter preferably and antiseptic effect evaluation experimental device and method, test mould
Intend acid gas field gathering system operating mode, establish corrosion inhibiter preferably and antiseptic effect evaluation experimental device, it is preferred corrosion inhibiter can be carried out
Experiment, the evaluation test of inhibitor film persistence, the experiment of anti-corrosion effect assessment, corrosion inhibiter and methanol Study on compatibility are tried
Test, test(ing) medium, operating condition of test are identical with live actual condition, and test data is true and reliable.
The content of the invention
It is an object of the invention to provide a kind of corrosion inhibiter preferably and antiseptic effect evaluation experimental device and method, so as to more
Evaluate well, preferred corrosion inhibiter, improve inhibition speed, it is ensured that acid gas field gathering line safe operation.
Present invention mainly solves following problem：1. by designing, corrosion inhibiter is preferred and antiseptic effect evaluation test fills
Put, carry out preferred corrosion inhibiter, the evaluation of inhibitor film persistence, anti-corrosion effect assessment, corrosion inhibiter and methanol compatibility and grind
Experiment, experimental study corrosion inhibiter inhibition efficiency, film persistence and the compatibility with methanol such as study carefully；2. the pre- membranous system of design, passes through
This system can carry out pre- film to pipeline；3. designing prefilmer, under external force, make corrosion inhibiter and treat at the top of pre- membrane tube line
Fully contact, avoid top inhibitor film thickness too low；4. designing corrosion rate detection method, pass through weight-loss method and dichloromethane
Solution ablution is used in combination, and evaluates the corrosion mitigating effect of corrosion inhibiter.
To achieve these goals, technical scheme is as follows.
A kind of corrosion inhibiter preferably and antiseptic effect evaluation experimental device, including：Sour natural gas pipeline 1, fuelgas pipeline
2nd, the first fuel gas intake valve 3, acid gas intake valve 4, temperature sensor 5, pressure sensor 6, control group trial zone 7, corrosion are hung
Piece 8, resistance probe 9, corrosion inhibiter filling point 10, methanol filling point 11, corrosion inhibiter filling sled 12, methanol filling sled 13, corrosion are surveyed
Try area 14, flange 15, first tests gas intake valve 16, second and tests the 18, first examination of intake valve of the experiment gas of gas intake valve the 17, the 3rd
Test gas air outlet valve 19, second and test the experiment gas of gas air outlet valve the 20, the 3rd air outlet valve 21, the combustion of the first fuel gas blow down valve 22, second
Expect gas blow down valve 23, the 3rd fuel gas blow down valve 24, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26, air water point
From device 27, sour natural gas air outlet valve 28, liquid getting device 29, pre- membranous system 30, prefilmer 315；
First fuel gas intake valve 3, acid gas intake valve 4 are connected with sour natural gas pipeline 1, fuelgas pipeline 2, and temperature passes
Sensor 5, pressure sensor 6 are symmetrically distributed in test track, control group trial zone 7 in circuit entrance location, corrosion coupon 8,
Resistance probe 9 is arranged on control group trial zone 7, monitors the corrosion rate of its pipeline, corrosion inhibiter filling point 10, methanol filling point
11 are connected with corrosion inhibiter filling sled 12, methanol filling sled 13 respectively, and corrosion test area 14, moisture trap 27 are linked in sequence, acid
Property natural gas air outlet valve 28, liquid getting device 29 are connected with moisture trap 27.
Further, corrosion test area 14 includes：First test module 150, the second test module the 151, the 3rd test mould
Block 152, the first pre- membrane tube line 141, the second pre- membrane tube line 142, the 3rd pre- membrane tube line 143, the 4th pre- membrane tube line the 144, the 5th are pre-
Membrane tube line 145, the 6th pre- membrane tube line 146, the 7th pre- membrane tube line 147, the 8th pre- membrane tube line 148, the 9th pre- membrane tube line 149；The
One pre- membrane tube line 141, the second pre- membrane tube line 142, the 3rd pre- membrane tube line 143 are assemblied in the first test module 150, the 4th pre- membrane tube
Line 144, the 5th pre- membrane tube line 145, the 6th pre- membrane tube line 146 are assemblied in the second test module 151, the 7th pre- membrane tube line 147,
Eight pre- membrane tube lines 148, the 9th pre- membrane tube line 149 are assemblied in the 3rd test module 152, and 9 pre- membrane tube lines pass through with test track
Flange 15 connects, and 9 pre- membrane tube lines carry out pre- film by pre- membranous system 30.
Further, above-mentioned corrosion inhibiter is preferably and the experiment that can carry out of antiseptic effect evaluation experimental device includes：Inhibition
Agent optimization test, the evaluation test of inhibitor film persistence, the experiment of anti-corrosion effect assessment, corrosion inhibiter and methanol compatibility are ground
Study carefully experiment, each tests concrete steps are respectively：
(1) corrosion inhibiter optimization test, concretely comprise the following steps：
S1, joint test device, debris in clearance test circuit, check sealing between each pipeline section, it is ensured that pipeline, valve
No leakage, temperature sensor 5, pressure sensor 6 are returned to zero；
S2, design, the pre- membranous system 30 of connection, treat that pre- membrane tube line is weighed to 9,0.1g are accurate to, according to corrosion inhibiter
Pre- membrane operations step treats that pre- membrane tube line carries out pre- film to 9, wherein, the first pre- membrane tube line 141, the second pre- membrane tube line the 142, the 3rd
Pre- membrane tube line 143 uses the pre- film of (A) type corrosion inhibiter, the 4th pre- membrane tube line 144, the 5th pre- membrane tube line 145, the 6th pre- membrane tube line
146 use the pre- film of (B) type corrosion inhibiter, and the 7th pre- membrane tube line 147, the 8th pre- membrane tube line 148, the 9th pre- membrane tube line 149 use
(C) the pre- film of type corrosion inhibiter；
S3, fit over 9 pre- membrane tubes are traditional thread binding in corrosion test area 14, pass through method between every pre- membrane tube line and test track
Orchid 15 connects；
S4, corrosion coupon 8, resistance probe 9 are installed on control group trial zone 7；
S5, opening acid gas intake valve 4, first are tested the experiment gas of the experiment gas of gas intake valve 16, second intake valve the 17, the 3rd and entered
Air valve 18, first tests the experiment gas air outlet valve 21 of the experiment gas of gas air outlet valve 19, second air outlet valve the 20, the 3rd, sour natural gas goes out
Air valve 28；Close the first fuel gas intake valve 3, the first fuel gas blow down valve 22, the second fuel gas blow down valve 23, the 3rd fuel gas
Blow down valve 24, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26；
During S6, experiment, corrosion coupon 8, the reading of resistance probe 9 on record control group trial zone 7, monitoring control group examination
Test the corrosion rate of pipeline in area 7；Timing takes liquid at liquid getting device 29, and inhibition is detected using corrosion inhibiter residual concentration analysis method
Agent residual concentration；
S7, experiment carry out 10~60d, close acid gas intake valve 4；
S8, according to the first sweeping process experimental rig is purged；
After S9, purging 1h, detect concentration of hydrogen sulfide in wide range pressure gauge drain multifunctional gas monitor and contain
Oxygen amount, when hydrogen sulfide content is less than 20ppm, oxygen content closes the first fuel gas intake valve 3 when being less than 2%, stop purging；
Laboratory is transported in 9 pre- membrane tube lines being assemblied under S10, dismounting in corrosion test area 14, entrucking, according to corrosion speed
Rate detecting step is handled；
S11, than selecting in 9 pre- membrane tube lines, corrosion rate is small, remaining inhibition dosage is big pre- membrane tube line, preferably inhibition
The more preferable corrosion inhibiter of effect；
(2) inhibitor film persistence evaluation test, is concretely comprised the following steps：
M1, temperature sensor in test track 5, pressure sensor 6 returned to zero；
M2,9 are treated with pre- membrane tube line is weighed, and is accurate to 0.1g, 9 are treated according to the pre- membrane operations step of corrosion inhibiter pre-
Membrane tube line carries out pre- film；
M3, repeat step S3~S6；
After M4, experiment carry out 10d, the first test module 150 is purged according to the second sweeping process, purging, which finishes, to be torn open
Laboratory is transported in lower first pre- membrane tube line 141, the second pre- membrane tube line 142, the 3rd pre- membrane tube line 143, entrucking, according to corrosion rate
Detecting step is handled；
After M5, experiment carry out 20d, the second test module 151 is purged according to the 3rd sweeping process, purging, which finishes, to be torn open
Laboratory is transported in lower 4th pre- membrane tube line 144, the 5th pre- membrane tube line 145, the 6th pre- membrane tube line 146, entrucking, according to corrosion rate
Detecting step is handled；
After M6, experiment carry out 30d, the 3rd test module 152 is purged according to the 4th sweeping process, purging, which finishes, to be torn open
Laboratory is transported in lower 7th pre- membrane tube line 147, the 8th pre- membrane tube line 148, the 9th pre- membrane tube line 149, entrucking, according to corrosion rate
Detecting step is handled；
M7, compare corrosion inhibiter residual concentration on 9 pre- membrane tube lines, evaluate corrosion inhibiter persistence；
(3) anti-corrosion effect assessment is tested, and is concretely comprised the following steps：
N1, temperature sensor in test track 5, pressure sensor 6 returned to zero；
N2,3 are treated with pre- membrane tube line is weighed, and is accurate to 0.1g, 3 are treated according to the pre- membrane operations step of corrosion inhibiter pre-
Membrane tube line carries out pre- film；
N3, fit over 3 pre- membrane tubes are traditional thread binding in the second test module 151, lead between every pre- membrane tube line and test track
Flange 15 is crossed to connect；
N4, corrosion coupon 8, resistance probe 9 are installed on control group trial zone 7；
N5, opening acid gas intake valve 4, first test the experiment gas of gas intake valve 16, first air outlet valve 19, sour natural gas goes out
Air valve 28；Close the first fuel gas intake valve 3, second experiment gas intake valve the 17, the 3rd and test the experiment gas of gas intake valve 18, second
Air outlet valve the 20, the 3rd tests gas air outlet valve 21, the first fuel gas blow down valve 22, the second fuel gas blow down valve 23, the 3rd fuel gas
Blow down valve 24, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26；
N6, repeat step S6, S7；
N7, according to the 3rd sweeping process experimental rig is purged；
N8, repeat step S9；
Laboratory is transported in 3 pre- membrane tube lines being assemblied under N9, dismounting in the second test module 151, entrucking, according to corrosion
Speed detecting step is handled；
N10, the pre- membrane tube line of comparison and the pipeline corrosion speed installed on control group trial zone 7, evaluation anti-corrosion effect
Fruit；
(4) corrosion inhibiter is tested with methanol Study on compatibility, is concretely comprised the following steps：
H1, temperature sensor in test track 5, pressure sensor 6 returned to zero；
H2,6 are treated with pre- membrane tube line is weighed, and is accurate to 0.1g, 6 are treated according to the pre- membrane operations step of corrosion inhibiter pre-
Membrane tube line carries out pre- film；
H3, will wherein 3 pre- membrane tubes are traditional thread binding fits in the first test module 150,3 articles of pre- membrane tubes are traditional thread binding in addition fits over the 3rd
In test module 152, connected between every pre- membrane tube line and test track by flange 15；
H4, corrosion coupon 8, resistance probe 9 are installed on control group trial zone 7；
H5, opening acid gas intake valve 4, second test the experiment gas of gas intake valve 17, second air outlet valve 20, sour natural gas goes out
Air valve 28, close the first fuel gas intake valve 3, first experiment gas intake valve the 16, the 3rd and test the experiment gas of gas intake valve 18, first
Air outlet valve the 19, the 3rd tests gas air outlet valve 21, the first fuel gas blow down valve 22, the second fuel gas blow down valve 23, the 3rd fuel gas
Blow down valve 24, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26；
After H6, experiment carry out 10d, the first test module 150 is purged according to the second sweeping process, purging, which finishes, to be torn open
Laboratory is transported in lower first pre- membrane tube line 141, the second pre- membrane tube line 142, the 3rd pre- membrane tube line 143, entrucking, according to corrosion rate
Detecting step is handled；
H7, opening acid gas intake valve the 4, the 3rd test the experiment gas of gas intake valve the 18, the 3rd air outlet valve 21, sour natural gas goes out
Air valve 28, close the first fuel gas intake valve 3, first experiment gas intake valve 16, second and test the experiment gas of gas intake valve 17, first
Air outlet valve 19, second tests gas air outlet valve 20, the first fuel gas blow down valve 22, the second fuel gas blow down valve 23, the 3rd fuel gas
Blow down valve 24, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26；
H8,13 proper amount of methanol is filled into test track through methanol filling point 11 using methanol filling sled；
After H9, experiment carry out 10d, the 3rd test module 152 is purged according to the 4th sweeping process, purging, which finishes, to be torn open
Laboratory is transported in lower 7th pre- membrane tube line 147, the 8th pre- membrane tube line 148, the 9th pre- membrane tube line 149, entrucking, according to corrosion rate
Detecting step is handled；
H10, compare the first pre- membrane tube line 141, the second pre- membrane tube line 142, the 3rd pre- 143 and the 7th pre- membrane tube line of membrane tube line
147th, the 8th pre- membrane tube line 148, the 9th pre- corrosion rate of membrane tube line 149 and corrosion inhibiter residual volume, evaluation corrosion inhibiter and methanol
Compatibility.
Further, the first sweeping process is：Open the first fuel gas intake valve 3, second experiment gas intake valve the 17, the 3rd
Test gas intake valve 18, second and test the experiment gas of gas air outlet valve the 20, the 3rd air outlet valve 21, draw fuel gas and enter from fuelgas pipeline 2
Enter test track.
Further, the second sweeping process is：The 3rd fuel gas blow down valve 24, the first fuel gas blow down valve 22 are opened, is closed
Close the second fuel gas blow down valve 23, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26.
Further, the 3rd sweeping process is：The 4th fuel gas blow down valve 25 is opened, closes the first fuel gas blow down valve
22, close the second fuel gas blow down valve 23, the 3rd fuel gas blow down valve 24, the 5th fuel gas blow down valve 26.
Further, the 4th sweeping process is：The second fuel gas blow down valve 23, the 5th fuel gas blow down valve 26 are opened, is closed
Close the first fuel gas blow down valve 22, the 3rd fuel gas blow down valve 24, the 4th fuel gas blow down valve 25.
Further, corrosion inhibiter residual concentration analysis method, including：Quick detection equipment, ultraviolet light spectrophotometer, can
See light spectrophotometer.
Further, corrosion rate detecting step is：
(1) the pre- membrane tube line inwall after dichloromethane solution water-wash test is used；
(2) dichloromethane solution after cleaning is collected using surge drum；
(3) surge drum for filling dichloromethane solution is put into the dichloromethane removed in rotary evaporator in solution；
(4) solution for removing dichloromethane is placed on and weighed up in advance in the aluminium dish of weight, is put into 55 DEG C of vacuum drying oven,
After drying, aluminium dish is weighed again, resulting weight difference is exactly inhibition dosage remaining after pre- membrane tube line inwall is tested；
(5) dried pre- membrane tube line is weighed, is accurate to 0.1g, calculate corrosion rate.
Further, pre- membranous system 30 includes：Reception device 301, hawser 302, fixed pulley 303, the discharge of remaining corrosion inhibiter
Valve 304, remaining corrosion inhibiter outlet 305, remaining corrosion inhibiter collector 306, late gate 307, adpting flange 308, the first pre- film
Area 309, the second Yu Mo areas 310, the 3rd Yu Mo areas 311, early gate 312, control system 313, dispensing device 314, prefilmer
315th, gas outlet 316, corrosion inhibiter filler 317, corrosion inhibiter overfall 318, treat pre- membrane tube line 319；Reception device 301, rear valve
The 307, first Yu Mo areas 309 of door, the second Yu Mo areas 310, the 3rd Yu Mo areas 311, early gate 312, the order of dispensing device 314 connect
Connect, 3 Ge Yumo areas are connected by adpting flange 308, and dump valve 304 connects with reception device 301, remaining corrosion inhibiter collector 306
Connect, fixed pulley 303 is arranged on reception device 301, the afterbody of dispensing device 314, and control system 313 is by hawser 302 around fixed sliding
Wheel 303 is connected with prefilmer 315, and gas outlet 316, corrosion inhibiter filler 317, corrosion inhibiter overfall 318 are arranged on transmission dress
Put on 314.
Further, prefilmer 315 is placed in dispensing device 314, it is characterised in that including：Fixing axle 320, bullet
Spring 321, permanent strong magnet 322, corrosion inhibiter 323, SDeflector 324, sliding ball 325, fixed ball 326, SDeflector 324, are fixed
Ball 326 is arranged on the both ends of 3 fixing axles 320, and spring 321 is wrapped in 3 fixing axles 320, and the right-hand member of spring 321 is fixed on
Determine on ball 326, left end is in free state, is not fixed on sliding ball 325, and sliding ball 325 can be slided in 3 fixing axles 320
It is dynamic, corrosion inhibiter 323 is added between SDeflector 324, sliding ball 325, permanent strong magnet 322 is arranged on SDeflector 324, sliding ball
325th, on fixed ball 326, the permanent strong magnet 322N poles installed on SDeflector 324 to the left, S poles to the right, pacify on sliding ball 325
The permanent strong magnet 322N poles of dress to the left, S poles to the right, the permanent strong magnet 322S poles installed on fixed ball 326 to the left, N
Pole is to the right.The pre- membrane operations step of corrosion inhibiter is：
(1) design, connect pre- membranous system 30；
(2) treat that pre- membrane tube line is arranged on the first Yu Mo areas 309, the second Yu Mo areas 310, the 3rd Yu Mo areas 311 by 3 articles；
(3) prefilmer 315 is placed in dispensing device 314；
(4) corrosion inhibiter filler 317 is opened, corrosion inhibiter is injected to the SDeflector 324 and sliding ball 325 of prefilmer 315
Between；
(5) corrosion inhibiter overfall 318 is slowly opened, is discharged in prefilmer 315 between corrosion inhibiter and dispensing device 314
Air, spring 321 are in compressive state；
(6) early gate 312, late gate 307 are opened；
(7) hawser 302 is pulled by control system 313, makes prefilmer 315 treat to move in pre- membrane tube line 319, control
The speed of prefilmer 315 is 1~2m/s；
(8) graviational interaction of permanent strong magnet 322 installed on SDeflector 324 and sliding ball 325, sliding ball 325 with
The effect of the repulsion of permanent strong magnet 322, the effect of the elastic force of spring 321 and the pulling force effect of hawser 302 installed on fixed ball 326
Under, the corrosion inhibiter between SDeflector 324 and sliding ball 325 maintains the state fully contacted with treating pre- membrane tube line 319, it is ensured that inhibition
The film forming thickness at the pre- top of membrane tube line 319 is being treated in agent；
(9) prefilmer 315 is received using reception device 301；
(10) remaining corrosion inhibiter dump valve 304 is opened, remaining corrosion inhibiter is flowed into remnants through remaining corrosion inhibiter outlet 305
Corrosion inhibiter collector 306；
(11) pull down the first Yu Mo areas 309, the second Yu Mo areas 310, the 3rd Yu Mo areas 311 installation treat pre- membrane tube line 319,
Preparation is assemblied in corrosion test area 14 and tested.
The beneficial effect of the invention is：
(1) by design corrosion inhibiter preferably and antiseptic effect evaluation experimental device, can carry out corrosion inhibiter preferably, corrosion inhibiter
The experiment such as film persistence evaluation, anti-corrosion effect assessment, corrosion inhibiter and methanol Study on compatibility, can be with experimental study inhibition
Agent inhibition efficiency, film persistence and the compatibility with methanol, preferably corrosion inhibiter, improve pipeline corrosion protection effect.
(2) pre- membranous system is designed, pre- membrane tube line can be provided for corrosion test area by this system, is experimental study inhibition
The persistence of agent film, the antiseptic effect of corrosion inhibiter provide means.
(3) prefilmer is designed, under the effect of permanent strong magnet, spring force effect and hawser pull effect, is made
Corrosion inhibiter fully contacts with treating at the top of pre- membrane tube line, avoids top inhibitor film thickness too low, ensures that pre- membrane tube line inner surface delays
It is uniform to lose agent film.
(4) corrosion rate detection method is designed, is used in combination by weight-loss method and dichloromethane solution ablution, evaluation is slow
Lose the corrosion mitigating effect of agent.
Brief description of the drawings
Fig. 1 is circuit experimental rig schematic diagram in the embodiment of the present invention.
Fig. 2 is pre- membranous system schematic diagram in the embodiment of the present invention.
Fig. 3 is that prefilmer starts film schematic diagram in the embodiment of the present invention.
Fig. 4 is prefilmer film process schematic in the embodiment of the present invention.
Fig. 5 be in the embodiment of the present invention prefilmer A-A to schematic diagram.
The embodiment of the present invention is described below in conjunction with the accompanying drawings, to be better understood from the present invention.
Embodiment
As shown in figure 1, a kind of corrosion inhibiter is preferred and antiseptic effect evaluation experimental device includes：Sour natural gas pipeline 1, combustion
Expect gas pipeline 2, the first fuel gas intake valve 3, acid gas intake valve 4, temperature sensor 5, pressure sensor 6, control group trial zone
7th, corrosion coupon 8, resistance probe 9, corrosion inhibiter filling point 10, methanol filling point 11, corrosion inhibiter filling sled 12, methanol filling sled
13rd, corrosion test area 14, flange 15, first test gas intake valve 16, second and test the experiment gas intake valve of gas intake valve the 17, the 3rd
18th, the first experiment gas air outlet valve 19, second tests gas air outlet valve the 20, the 3rd and tests gas air outlet valve 21, the first fuel gas blow down valve
22nd, the second fuel gas blow down valve 23, the 3rd fuel gas blow down valve 24, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve
26th, moisture trap 27, sour natural gas air outlet valve 28, liquid getting device 29, pre- membranous system 30, prefilmer 315；
First fuel gas intake valve 3, acid gas intake valve 4 are connected with sour natural gas pipeline 1, fuelgas pipeline 2, and temperature passes
Sensor 5, pressure sensor 6 are symmetrically distributed in test track, control group trial zone 7 in circuit entrance location, corrosion coupon 8,
Resistance probe 9 is arranged on control group trial zone 7, monitors the corrosion rate of its pipeline, corrosion inhibiter filling point 10, methanol filling point
11 are connected with corrosion inhibiter filling sled 12, methanol filling sled 13 respectively, and corrosion test area 14, moisture trap 27 are linked in sequence, acid
Property natural gas air outlet valve 28, liquid getting device 29 are connected with moisture trap 27.
Corrosion test area 14 includes：First test module 150, the second test module 151, the 3rd test module 152, first
Pre- membrane tube line 141, the second pre- membrane tube line 142, the 3rd pre- membrane tube line 143, the 4th pre- membrane tube line 144, the 5th pre- membrane tube line 145,
6th pre- membrane tube line 146, the 7th pre- membrane tube line 147, the 8th pre- membrane tube line 148, the 9th pre- membrane tube line 149；First pre- membrane tube line
141st, the second pre- membrane tube line 142, the 3rd pre- membrane tube line 143 are assemblied in the first test module 150, the 4th pre- membrane tube line the 144, the 5th
Pre- membrane tube line 145, the 6th pre- membrane tube line 146 are assemblied in the second test module 151, the 7th pre- membrane tube line 147, the 8th pre- membrane tube line
148th, the 9th pre- membrane tube line 149 is assemblied in the 3rd test module 152, and 9 pre- membrane tube lines are connected with test track by flange 15,
9 pre- membrane tube lines carry out pre- film by pre- membranous system 30.
Above-mentioned corrosion inhibiter is preferably and the experiment that can carry out of antiseptic effect evaluation experimental device includes：Corrosion inhibiter preferably tries
Test, the evaluation test of inhibitor film persistence, the experiment of anti-corrosion effect assessment, corrosion inhibiter and methanol Study on compatibility are tested,
Characterized in that, each tests concrete steps are respectively：
(1) corrosion inhibiter optimization test, concretely comprise the following steps：
S1, joint test device, debris in clearance test circuit, check sealing between each pipeline section, it is ensured that pipeline, valve
No leakage, temperature sensor 5, pressure sensor 6 are returned to zero；
S2, design, the pre- membranous system 30 of connection, treat that pre- membrane tube line is weighed to 9,0.1g are accurate to, according to corrosion inhibiter
Pre- membrane operations step treats that pre- membrane tube line carries out pre- film to 9, wherein, the first pre- membrane tube line 141, the second pre- membrane tube line the 142, the 3rd
Pre- membrane tube line 143 uses the pre- film of (A) type corrosion inhibiter, the 4th pre- membrane tube line 144, the 5th pre- membrane tube line 145, the 6th pre- membrane tube line
146 use the pre- film of (B) type corrosion inhibiter, and the 7th pre- membrane tube line 147, the 8th pre- membrane tube line 148, the 9th pre- membrane tube line 149 use
(C) the pre- film of type corrosion inhibiter；
S3, fit over 9 pre- membrane tubes are traditional thread binding in corrosion test area 14, pass through method between every pre- membrane tube line and test track
Orchid 15 connects；
S4, corrosion coupon 8, resistance probe 9 are installed on control group trial zone 7；
S5, opening acid gas intake valve 4, first are tested the experiment gas of the experiment gas of gas intake valve 16, second intake valve the 17, the 3rd and entered
Air valve 18, first tests the experiment gas air outlet valve 21 of the experiment gas of gas air outlet valve 19, second air outlet valve the 20, the 3rd, sour natural gas goes out
Air valve 28；Close the first fuel gas intake valve 3, the first fuel gas blow down valve 22, the second fuel gas blow down valve 23, the 3rd fuel gas
Blow down valve 24, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26；
During S6, experiment, corrosion coupon 8, the reading of resistance probe 9 on record control group trial zone 7, monitoring control group examination
Test the corrosion rate of pipeline in area 7；Timing takes liquid at liquid getting device 29, and inhibition is detected using corrosion inhibiter residual concentration analysis method
Agent residual concentration；
S7, experiment carry out 10~60d, close acid gas intake valve 4；
S8, according to the first sweeping process experimental rig is purged；
After S9, purging 1h, detect concentration of hydrogen sulfide in wide range pressure gauge drain multifunctional gas monitor and contain
Oxygen amount, when hydrogen sulfide content is less than 20ppm, oxygen content closes the first fuel gas intake valve 3 when being less than 2%, stop purging；
Laboratory is transported in 9 pre- membrane tube lines being assemblied under S10, dismounting in corrosion test area 14, entrucking, according to corrosion speed
Rate detecting step is handled；
S11, than selecting in 9 pre- membrane tube lines, corrosion rate is small, remaining inhibition dosage is big pre- membrane tube line, preferably inhibition
The more preferable corrosion inhibiter of effect；
(2) inhibitor film persistence evaluation test, is concretely comprised the following steps：
M1, temperature sensor in test track 5, pressure sensor 6 returned to zero；
M2,9 are treated with pre- membrane tube line is weighed, and is accurate to 0.1g, 9 are treated according to the pre- membrane operations step of corrosion inhibiter pre-
Membrane tube line carries out pre- film；
M3, repeat step S3~S6；
After M4, experiment carry out 10d, the first test module 150 is purged according to the second sweeping process, purging, which finishes, to be torn open
Laboratory is transported in lower first pre- membrane tube line 141, the second pre- membrane tube line 142, the 3rd pre- membrane tube line 143, entrucking, according to corrosion rate
Detecting step is handled；
After M5, experiment carry out 20d, the second test module 151 is purged according to the 3rd sweeping process, purging, which finishes, to be torn open
Laboratory is transported in lower 4th pre- membrane tube line 144, the 5th pre- membrane tube line 145, the 6th pre- membrane tube line 146, entrucking, according to corrosion rate
Detecting step is handled；
After M6, experiment carry out 30d, the 3rd test module 152 is purged according to the 4th sweeping process, purging, which finishes, to be torn open
Laboratory is transported in lower 7th pre- membrane tube line 147, the 8th pre- membrane tube line 148, the 9th pre- membrane tube line 149, entrucking, according to corrosion rate
Detecting step is handled；
M7, compare corrosion inhibiter residual concentration on 9 pre- membrane tube lines, evaluate corrosion inhibiter persistence；
(3) anti-corrosion effect assessment is tested, and is concretely comprised the following steps：
N1, temperature sensor in test track 5, pressure sensor 6 returned to zero；
N2,3 are treated with pre- membrane tube line is weighed, and is accurate to 0.1g, 3 are treated according to the pre- membrane operations step of corrosion inhibiter pre-
Membrane tube line carries out pre- film；
N3, fit over 3 pre- membrane tubes are traditional thread binding in the second test module 151, lead between every pre- membrane tube line and test track
Flange 15 is crossed to connect；
N4, corrosion coupon 8, resistance probe 9 are installed on control group trial zone 7；
N5, opening acid gas intake valve 4, first test the experiment gas of gas intake valve 16, first air outlet valve 19, sour natural gas goes out
Air valve 28；Close the first fuel gas intake valve 3, second experiment gas intake valve the 17, the 3rd and test the experiment gas of gas intake valve 18, second
Air outlet valve the 20, the 3rd tests gas air outlet valve 21, the first fuel gas blow down valve 22, the second fuel gas blow down valve 23, the 3rd fuel gas
Blow down valve 24, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26；
N6, repeat step S6, S7；
N7, according to the 3rd sweeping process experimental rig is purged；
N8, repeat step S9；
Laboratory is transported in 3 pre- membrane tube lines being assemblied under N9, dismounting in the second test module 151, entrucking, according to corrosion
Speed detecting step is handled；
N10, the pre- membrane tube line of comparison and the pipeline corrosion speed installed on control group trial zone 7, evaluation anti-corrosion effect
Fruit；
(4) corrosion inhibiter is tested with methanol Study on compatibility, is concretely comprised the following steps：
H1, temperature sensor in test track 5, pressure sensor 6 returned to zero；
H2,6 are treated with pre- membrane tube line is weighed, and is accurate to 0.1g, 6 are treated according to the pre- membrane operations step of corrosion inhibiter pre-
Membrane tube line carries out pre- film；
H3, will wherein 3 pre- membrane tubes are traditional thread binding fits in the first test module 150,3 articles of pre- membrane tubes are traditional thread binding in addition fits over the 3rd
In test module 152, connected between every pre- membrane tube line and test track by flange 15；
H4, corrosion coupon 8, resistance probe 9 are installed on control group trial zone 7；
H5, opening acid gas intake valve 4, second test the experiment gas of gas intake valve 17, second air outlet valve 20, sour natural gas goes out
Air valve 28, close the first fuel gas intake valve 3, first experiment gas intake valve the 16, the 3rd and test the experiment gas of gas intake valve 18, first
Air outlet valve the 19, the 3rd tests gas air outlet valve 21, the first fuel gas blow down valve 22, the second fuel gas blow down valve 23, the 3rd fuel gas
Blow down valve 24, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26；
After H6, experiment carry out 10d, the first test module 150 is purged according to the second sweeping process, purging, which finishes, to be torn open
Laboratory is transported in lower first pre- membrane tube line 141, the second pre- membrane tube line 142, the 3rd pre- membrane tube line 143, entrucking, according to corrosion rate
Detecting step is handled；
H7, opening acid gas intake valve the 4, the 3rd test the experiment gas of gas intake valve the 18, the 3rd air outlet valve 21, sour natural gas goes out
Air valve 28, close the first fuel gas intake valve 3, first experiment gas intake valve 16, second and test the experiment gas of gas intake valve 17, first
Air outlet valve 19, second tests gas air outlet valve 20, the first fuel gas blow down valve 22, the second fuel gas blow down valve 23, the 3rd fuel gas
Blow down valve 24, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26；
H8,13 proper amount of methanol is filled into test track through methanol filling point 11 using methanol filling sled；
After H9, experiment carry out 10d, the 3rd test module 152 is purged according to the 4th sweeping process, purging, which finishes, to be torn open
Laboratory is transported in lower 7th pre- membrane tube line 147, the 8th pre- membrane tube line 148, the 9th pre- membrane tube line 149, entrucking, according to corrosion rate
Detecting step is handled；
H10, compare the first pre- membrane tube line 141, the second pre- membrane tube line 142, the 3rd pre- 143 and the 7th pre- membrane tube line of membrane tube line
147th, the 8th pre- membrane tube line 148, the 9th pre- corrosion rate of membrane tube line 149 and corrosion inhibiter residual volume, evaluation corrosion inhibiter and methanol
Compatibility.
First sweeping process is：The experiment gas of the first fuel gas intake valve 3, second experiment gas intake valve the 17, the 3rd is opened to enter
Air valve 18, second tests gas air outlet valve the 20, the 3rd and tests gas air outlet valve 21, draws fuel gas and enters proving ring from fuelgas pipeline 2
Road；Second sweeping process is：The 3rd fuel gas blow down valve 24, the first fuel gas blow down valve 22 are opened, closes the second fuel air-blowing
Sweep valve 23, the 4th fuel gas blow down valve 25, the 5th fuel gas blow down valve 26；3rd sweeping process is：Open the 4th fuel air-blowing
Valve 25 is swept, closes the first fuel gas blow down valve 22, closes the second fuel gas blow down valve 23, the 3rd fuel gas blow down valve the 24, the 5th
Fuel gas blow down valve 26；4th sweeping process is：The second fuel gas blow down valve 23, the 5th fuel gas blow down valve 26 are opened, is closed
First fuel gas blow down valve 22, the 3rd fuel gas blow down valve 24, the 4th fuel gas blow down valve 25.
Corrosion inhibiter residual concentration analysis method, including：Quick detection equipment, ultraviolet light spectrophotometer, visible light light-splitting
Degree meter.
Corrosion rate detecting step is：
(1) the pre- membrane tube line inwall after dichloromethane solution water-wash test is used；
(2) dichloromethane solution after cleaning is collected using surge drum；
(3) surge drum for filling dichloromethane solution is put into the dichloromethane removed in rotary evaporator in solution；
(4) solution for removing dichloromethane is placed on and weighed up in advance in the aluminium dish of weight, is put into 55 DEG C of vacuum drying oven,
After drying, aluminium dish is weighed again, resulting weight difference is exactly inhibition dosage remaining after pre- membrane tube line inwall is tested；
(5) dried pre- membrane tube line is weighed, is accurate to 0.1g, calculate corrosion rate.
As shown in Fig. 2,3,4,5, pre- membranous system 30 includes：Reception device 301, hawser 302, fixed pulley 303, remaining inhibition
Agent dump valve 304, remaining corrosion inhibiter outlet 305, remaining corrosion inhibiter collector 306, late gate 307, adpting flange 308,
It is one Yu Mo areas 309, the second Yu Mo areas 310, the 3rd Yu Mo areas 311, early gate 312, control system 313, dispensing device 314, pre-
Film device 315, gas outlet 316, corrosion inhibiter filler 317, corrosion inhibiter overfall 318, treat pre- membrane tube line 319；Reception device
301st, late gate 307, the first Yu Mo areas 309, the second Yu Mo areas 310, the 3rd Yu Mo areas 311, early gate 312, dispensing device 314
It is linked in sequence, 3 Ge Yumo areas are connected by adpting flange 308, dump valve 304 and reception device 301, remaining corrosion inhibiter collector
306 connections, fixed pulley 303 are arranged on reception device 301, the afterbody of dispensing device 314, and control system 313 is bypassed by hawser 302
Fixed pulley 303 is connected with prefilmer 315, and gas outlet 316, corrosion inhibiter filler 317, corrosion inhibiter overfall 318 are arranged on hair
Send on device 314.
Prefilmer 315 is placed in dispensing device 314, it is characterised in that including：It is fixing axle 320, spring 321, permanent
Property strong magnet 322, corrosion inhibiter 323, SDeflector 324, sliding ball 325, fixed ball 326, SDeflector 324, fixed ball 326 are arranged on
The both ends of 3 fixing axles 320, spring 321 are wrapped in 3 fixing axles 320, and the right-hand member of spring 321 is fixed on fixed ball 326,
Left end is in free state, is not fixed on sliding ball 325, and sliding ball 325 can slide in 3 fixing axles 320, SDeflector
324th, corrosion inhibiter 323 is added between sliding ball 325, permanent strong magnet 322 is arranged on SDeflector 324, sliding ball 325, fixed
On ball 326, the permanent strong magnet 322N poles installed on SDeflector 324 to the left, S poles to the right, that is installed on sliding ball 325 is permanent
Property strong magnet 322N poles to the left, S poles to the right, the permanent strong magnet 322S poles installed on fixed ball 326 to the left, N poles to the right.On
Stating the pre- membrane operations step of corrosion inhibiter is：
(1) design, connect pre- membranous system 30；
(2) treat that pre- membrane tube line is arranged on the first Yu Mo areas 309, the second Yu Mo areas 310, the 3rd Yu Mo areas 311 by 3 articles；
(3) prefilmer 315 is placed in dispensing device 314；
(4) corrosion inhibiter filler 317 is opened, corrosion inhibiter is injected to the SDeflector 324 and sliding ball 325 of prefilmer 315
Between；
(5) corrosion inhibiter overfall 318 is slowly opened, is discharged in prefilmer 315 between corrosion inhibiter and dispensing device 314
Air, spring 321 are in compressive state；
(6) early gate 312, late gate 307 are opened；
(7) hawser 302 is pulled by control system 313, makes prefilmer 315 treat to move in pre- membrane tube line 319, control
The speed of prefilmer 315 is 1~2m/s；
(8) graviational interaction of permanent strong magnet 322 installed on SDeflector 324 and sliding ball 325, sliding ball 325 with
The effect of the repulsion of permanent strong magnet 322, the effect of the elastic force of spring 321 and the pulling force effect of hawser 302 installed on fixed ball 326
Under, the corrosion inhibiter between SDeflector 324 and sliding ball 325 maintains the state fully contacted with treating pre- membrane tube line 319, it is ensured that inhibition
The film forming thickness at the pre- top of membrane tube line 319 is being treated in agent；
(9) prefilmer 315 is received using reception device 301；
(10) remaining corrosion inhibiter dump valve 304 is opened, remaining corrosion inhibiter is flowed into remnants through remaining corrosion inhibiter outlet 305
Corrosion inhibiter collector 306；
(11) pull down the first Yu Mo areas 309, the second Yu Mo areas 310, the 3rd Yu Mo areas 311 installation treat pre- membrane tube line 319,
Preparation is assemblied in corrosion test area 14 and tested.
Above is the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as this hair
Bright protection domain.
Claims (9)
1. a kind of corrosion inhibiter preferably and antiseptic effect evaluation experimental device, it is characterised in that including：Sour natural gas pipeline (1),
Fuelgas pipeline (2), the first fuel gas intake valve (3), acid gas intake valve (4), temperature sensor (5), pressure sensor (6),
Control group trial zone (7), corrosion coupon (8), resistance probe (9), corrosion inhibiter filling point (10), methanol filling point (11), inhibition
Agent filling sled (12), methanol filling sled (13), corrosion test area (14), flange (15), the first experiment gas intake valve (16), second
Test gas intake valve (17), the 3rd experiment gas intake valve (18), the first experiment gas air outlet valve (19), the second experiment gas air outlet valve
(20), the 3rd experiment gas air outlet valve (21), the first fuel gas blow down valve (22), the second fuel gas blow down valve (23), the 3rd fuel
Gas blow down valve (24), the 4th fuel gas blow down valve (25), the 5th fuel gas blow down valve (26), moisture trap (27), acid day
Right gas air outlet valve (28), liquid getting device (29), pre- membranous system (30), prefilmer (315)；
The first fuel gas intake valve (3), acid gas intake valve (4) and the sour natural gas pipeline (1), fuelgas pipeline
(2) it is connected, the temperature sensor (5), pressure sensor (6) are symmetrically distributed in test track, the control group trial zone
(7) it is arranged in circuit entrance location, the corrosion coupon (8), resistance probe (9) on control group trial zone (7), monitors its pipe
The corrosion rate in road, the corrosion inhibiter filling point (10), methanol filling point (11) fill sled (12) with corrosion inhibiter respectively, methanol adds
Note sled (13) connection, the corrosion test area (14), moisture trap (27) are linked in sequence, the sour natural gas air outlet valve
(28), liquid getting device (29) is connected with moisture trap (27).
2. a kind of corrosion inhibiter according to claim 1 preferably and antiseptic effect evaluation experimental device, it is characterised in that it is described
Corrosion test area (14) includes：First test module (150), the second test module (151), the 3rd test module (152), first
Pre- membrane tube line (141), the second pre- membrane tube line (142), the 3rd pre- membrane tube line (143), the 4th pre- membrane tube line (144), the 5th pre- film
Pipeline (145), the 6th pre- membrane tube line (146), the 7th pre- membrane tube line (147), the 8th pre- membrane tube line (148), the 9th pre- membrane tube line
(149)；The first pre- membrane tube line (141), the second pre- membrane tube line (142), the 3rd pre- membrane tube line (143) are assemblied in the first test
Module (150), the 4th pre- membrane tube line (144), the 5th pre- membrane tube line (145), the 6th pre- membrane tube line (146) are assemblied in second
Test module (151), the 7th pre- membrane tube line (147), the 8th pre- membrane tube line (148), the 9th pre- membrane tube line (149) are assemblied in
3rd test module (152), 9 pre- membrane tube lines are connected with test track by the flange (15), 9 pre- membrane tubes
Line carries out pre- film by the pre- membranous system (30).
3. a kind of corrosion inhibiter according to claim 1 preferably and antiseptic effect evaluation experimental device, it is characterised in that it is described
Pre- membranous system (30) includes：It is reception device (301), hawser (302), fixed pulley (303), remaining corrosion inhibiter dump valve (304), residual
Remaining corrosion inhibiter outlet (305), remaining corrosion inhibiter collector (306), late gate (307), adpting flange (308), the first pre- film
Area (309), the second Yu Mo areas (310), the 3rd Yu Mo areas (311), early gate (312), control system (313), dispensing device
(314), prefilmer (315), gas outlet (316), corrosion inhibiter filler (317), corrosion inhibiter overfall (318), treat pre- membrane tube
Line (319)；It is the reception device (301), late gate (307), the first Yu Mo areas (309), the second Yu Mo areas (310), the 3rd pre-
Film area (311), early gate (312), dispensing device (314) are linked in sequence, and the 3 Ge Yumo areas are connected by adpting flange (308)
Connect, the dump valve (304)1It is connected with reception device (301), remaining corrosion inhibiter collector (306), the fixed pulley (303)
Installed in the reception device (301), dispensing device (314) afterbody, the control system (313) is bypassed by hawser (302)
Fixed pulley (303) is connected with prefilmer (315), the gas outlet (316), corrosion inhibiter filler (317), corrosion inhibiter overfall
(318) it is arranged on the dispensing device (314).
4. a kind of corrosion inhibiter according to claim 1 preferably and antiseptic effect evaluation experimental device, the prefilmer
(315) it is placed in dispensing device (314), it is characterised in that including：Fixing axle (320), spring (321), permanent strong magnet
(322), corrosion inhibiter (323), SDeflector (324), sliding ball (325), fixed ball (326), the SDeflector (324), fixed ball
(326) both ends of 3 fixing axles (320) are arranged on, the spring (321) is wrapped on 3 fixing axles (320), the spring
(321) right-hand member is fixed on the fixed ball (326), and left end is in free state, is not fixed on the sliding ball (325),
The sliding ball (325) can be slided on 3 fixing axles (320), be added between the SDeflector (324), sliding ball (325) slow
Agent (323) is lost, the permanent strong magnet (322) is arranged on SDeflector (324), sliding ball (325), fixed on ball (326), institute
State permanent strong magnet (322) the N poles installed on SDeflector (324) to the left, S poles to the right, installed on the sliding ball (325)
Permanent strong magnet (322) N poles to the left, S poles to the right, permanent strong magnet (322) the S poles installed on the fixed ball (326)
To the left, N poles are to the right.
5. a kind of corrosion inhibiter is preferably and antiseptic effect evaluation test method, the experiment that test track can be carried out include：Corrosion inhibiter
Optimization test, the evaluation test of inhibitor film persistence, the experiment of anti-corrosion effect assessment, corrosion inhibiter and methanol Study on compatibility
Experiment, it is characterised in that the tests concrete steps are respectively：
(1) corrosion inhibiter optimization test, concretely comprise the following steps：
S1, joint test device, debris in clearance test circuit, check sealing between each pipeline section, it is ensured that pipeline, valve are without letting out
Leakage, temperature sensor (5), pressure sensor (6) are returned to zero；
S2, design, the pre- membranous system (30) of connection, treat that pre- membrane tube line is weighed to 9, are accurate to 0.1g, pre- according to corrosion inhibiter
Membrane operations step treats that pre- membrane tube line carries out pre- film to 9, wherein, the first pre- membrane tube line (141), the second pre- membrane tube line (142), the
Three pre- membrane tube lines (143) use the pre- film of (A) type corrosion inhibiter, the 4th pre- membrane tube line (144), the 5th pre- membrane tube line (145), the 6th
Pre- membrane tube line (146) uses the pre- film of (B) type corrosion inhibiter, the 7th pre- membrane tube line (147), the 8th pre- membrane tube line (148), the 9th pre-
Membrane tube line (149) uses the pre- film of (C) type corrosion inhibiter；
S3, fit over 9 pre- membrane tubes are traditional thread binding in corrosion test area (14), pass through flange between every pre- membrane tube line and test track
(15) connect；
S4, corrosion coupon (8), resistance probe (9) are installed on control group trial zone (7)；
S5, open acid gas intake valve (4), the first experiment gas intake valve (16), the second experiment gas intake valve (17), the 3rd experiment gas
Intake valve (18), the first experiment gas air outlet valve (19), the second experiment gas air outlet valve (20), the 3rd experiment gas air outlet valve (21), acid
Property natural gas air outlet valve (28)；Close the first fuel gas intake valve (3), the first fuel gas blow down valve (22), the second fuel air-blowing
Sweep valve (23), the 3rd fuel gas blow down valve (24),2Four fuel gas blow down valves (25), the 5th fuel gas blow down valve (26)；
During S6, experiment, corrosion coupon (8), resistance probe (9) reading on record control group trial zone (7), control group is monitored
The corrosion rate of pipeline on trial zone (7)；Timing takes liquid at liquid getting device (29) place, is examined using corrosion inhibiter residual concentration analysis method
Survey corrosion inhibiter residual concentration；
S7, experiment carry out 10~60d, close acid gas intake valve (4)；
S8, according to the first sweeping process experimental rig is purged；
After S9, purging 1h, concentration of hydrogen sulfide and oxygen content are detected with multifunctional gas monitor in wide range pressure gauge drain,
When hydrogen sulfide content is less than 20ppm, oxygen content closes the first fuel gas intake valve (3) when being less than 2%, stop purging；
Laboratory is transported in 9 pre- membrane tube lines being assemblied under S10, dismounting in corrosion test area (14), entrucking, according to corrosion rate
Detecting step is handled；
S11, than selecting in 9 pre- membrane tube lines, corrosion rate is small, remaining inhibition dosage is big pre- membrane tube line, preferably corrosion mitigating effect
More preferable corrosion inhibiter；
(2) inhibitor film persistence evaluation test, is concretely comprised the following steps：
M1, by temperature sensor in test track (5), pressure sensor (6) return to zero；
M2,9 are treated with pre- membrane tube line is weighed, and is accurate to 0.1g, pre- membrane tube is treated to 9 according to the pre- membrane operations step of corrosion inhibiter
Line carries out pre- film；
M3, repeat step S3~S6；
After M4, experiment carry out 10d, the first test module (150) is purged according to the second sweeping process, purging, which finishes, to be pulled down
Laboratory is transported in first pre- membrane tube line (141), the second pre- membrane tube line (142), the 3rd pre- membrane tube line (143), entrucking, according to corrosion
Speed detecting step is handled；
After M5, experiment carry out 20d, the second test module (151) is purged according to the 3rd sweeping process, purging, which finishes, to be pulled down
Laboratory is transported in 4th pre- membrane tube line (144), the 5th pre- membrane tube line (145), the 6th pre- membrane tube line (146), entrucking, according to corrosion
Speed detecting step is handled；
After M6, experiment carry out 30d, the 3rd test module (152) is purged according to the 4th sweeping process, purging, which finishes, to be pulled down
Laboratory is transported in 7th pre- membrane tube line (147), the 8th pre- membrane tube line (148), the 9th pre- membrane tube line (149), entrucking, according to corrosion
Speed detecting step is handled；
M7, compare corrosion inhibiter residual concentration on 9 pre- membrane tube lines, evaluate corrosion inhibiter persistence；
(3) anti-corrosion effect assessment is tested, and is concretely comprised the following steps：
N1, by temperature sensor in test track (5), pressure sensor (6) return to zero；
N2,3 are treated with pre- membrane tube line is weighed, and is accurate to 0.1g, pre- membrane tube is treated to 3 according to the pre- membrane operations step of corrosion inhibiter
Line carries out pre- film；
N3, fit over the second test mould by 3 pre- membrane tubes are traditional thread binding3On block (151), pass through between every pre- membrane tube line and test track
Flange (15) connects；
N4, corrosion coupon (8), resistance probe (9) are installed on control group trial zone (7)；
N5, open acid gas intake valve (4), the first experiment gas intake valve (16), the first experiment gas air outlet valve (19), sour natural gas
Air outlet valve (28)；Close the first fuel gas intake valve (3), second experiment gas intake valve (17), the 3rd experiment gas intake valve (18),
Second experiment gas air outlet valve (20), the 3rd experiment gas air outlet valve (21), the first fuel gas blow down valve (22), the second fuel gas purging
Valve (23), the 3rd fuel gas blow down valve (24), the 4th fuel gas blow down valve (25), the 5th fuel gas blow down valve (26)；
N6, repeat step S6, S7；
N7, according to the 3rd sweeping process experimental rig is purged；
N8, repeat step S9；
Laboratory is transported in 3 pre- membrane tube lines being assemblied under N9, dismounting in the second test module (151), entrucking, according to corrosion speed
Rate detecting step is handled；
N10, the pre- membrane tube line of comparison and the pipeline corrosion speed installed on control group trial zone (7), evaluate anti-corrosion effect；
(4) corrosion inhibiter is tested with methanol Study on compatibility, is concretely comprised the following steps：
H1, by temperature sensor in test track (5), pressure sensor (6) return to zero；
H2,6 are treated with pre- membrane tube line is weighed, and is accurate to 0.1g, pre- membrane tube is treated to 6 according to the pre- membrane operations step of corrosion inhibiter
Line carries out pre- film；
H3, will wherein 3 pre- membrane tubes are traditional thread binding fits in the first test module (150), 3 articles of pre- membrane tubes are traditional thread binding in addition fits over the 3rd survey
On die trial block (152), connected between every pre- membrane tube line and test track by flange (15)；
H4, corrosion coupon (8), resistance probe (9) are installed on control group trial zone (7)；
H5, open acid gas intake valve (4), the second experiment gas intake valve (17), the second experiment gas air outlet valve (20), sour natural gas
Air outlet valve (28), close the first fuel gas intake valve (3), first experiment gas intake valve (16), the 3rd experiment gas intake valve (18),
First experiment gas air outlet valve (19), the 3rd experiment gas air outlet valve (21), the first fuel gas blow down valve (22), the second fuel gas purging
Valve (23), the 3rd fuel gas blow down valve (24), the 4th fuel gas blow down valve (25), the 5th fuel gas blow down valve (26)；
After H6, experiment carry out 10d, the first test module (150) is purged according to the second sweeping process, purging, which finishes, to be pulled down
Laboratory is transported in first pre- membrane tube line (141), the second pre- membrane tube line (142), the 3rd pre- membrane tube line (143), entrucking, according to corrosion
Speed detecting step is handled；
H7, open acid gas intake valve (4), the 3rd experiment gas intake valve (18), the 3rd experiment gas air outlet valve (21), sour natural gas
Air outlet valve (28), close the first fuel gas intake valve (3), first experiment gas intake valve (16), second experiment gas intake valve (17),
First experiment gas air outlet valve (19), the second experiment4Gas air outlet valve (20), the first fuel gas blow down valve (22), the second fuel air-blowing
Sweep valve (23), the 3rd fuel gas blow down valve (24), the 4th fuel gas blow down valve (25), the 5th fuel gas blow down valve (26)；
H8, using methanol fill sled (13) proper amount of methanol is filled into test track through methanol filling point (11)；
After H9, experiment carry out 10d, the 3rd test module (152) is purged according to the 4th sweeping process, purging, which finishes, to be pulled down
Laboratory is transported in 7th pre- membrane tube line (147), the 8th pre- membrane tube line (148), the 9th pre- membrane tube line (149), entrucking, according to corrosion
Speed detecting step is handled；
H10, compare the first pre- membrane tube line (141), the second pre- membrane tube line (142), the 3rd pre- membrane tube line (143) and the 7th pre- membrane tube
Line (147), the 8th pre- membrane tube line (148), the 9th pre- membrane tube line (149) corrosion rate and corrosion inhibiter residual volume, evaluate corrosion inhibiter
With the compatibility of methanol.
6. a kind of corrosion inhibiter according to claim 5 preferably and antiseptic effect evaluation test method, it is characterised in that it is described
First sweeping process is：Open the first fuel gas intake valve (3), the second experiment gas intake valve (17), the 3rd experiment gas intake valve
(18), the second experiment gas air outlet valve (20), the 3rd experiment gas air outlet valve (21), draw fuel gas and enter examination from fuelgas pipeline (2)
Test circuit；Second sweeping process is：The 3rd fuel gas blow down valve (24), the first fuel gas blow down valve (22) are opened, is closed
Second fuel gas blow down valve (23), the 4th fuel gas blow down valve (25), the 5th fuel gas blow down valve (26)；3rd purging stream
Cheng Wei：The 4th fuel gas blow down valve (25) is opened, closes the first fuel gas blow down valve (22), closes the second fuel gas blow down valve
(23), the 3rd fuel gas blow down valve (24), the 5th fuel gas blow down valve (26)；4th sweeping process is：Open the second combustion
Expect gas blow down valve (23), the 5th fuel gas blow down valve (26), close the first fuel gas blow down valve (22), the 3rd fuel gas blow down valve
(24), the 4th fuel gas blow down valve (25).
7. a kind of corrosion inhibiter according to claim 5 preferably and antiseptic effect evaluation test method, it is characterised in that it is described
The pre- membrane operations step of corrosion inhibiter is：
(1) design, connect pre- membranous system (30)；
(2) treat that pre- membrane tube line is arranged on the first Yu Mo areas (309), the second Yu Mo areas (310), the 3rd Yu Mo areas (311) by 3 articles；
(3) prefilmer (315) is placed in dispensing device (314)；
(4) corrosion inhibiter filler (317) is opened, corrosion inhibiter is injected to the SDeflector (324) and sliding ball of prefilmer (315)
(325) between；
(5) corrosion inhibiter overfall (318) is slowly opened, between the interior corrosion inhibiter of discharge prefilmer (315) and dispensing device (314)
Air, spring (321) is in compressive state；
(6) early gate (312), late gate (307) are opened；
(7) hawser (302) is pulled by control system (313), makes prefilmer (315) treat to move in pre- membrane tube line (319),
It is 1~2m/s to control prefilmer (315) speed；
(8) in SDeflector (324) and sliding ball (325)5Permanent strong magnet (322) graviational interaction of upper installation, sliding ball
(325) effect of permanent strong magnet (322) repulsion, the effect of spring (321) elastic force and hawser with being installed on fixed ball (326)
(302) under pulling force effect, the corrosion inhibiter between SDeflector (324) and sliding ball (325) is maintained with treating that pre- membrane tube line (319) is abundant
The state of contact, it is ensured that corrosion inhibiter is treating the film forming thickness at the top of pre- membrane tube line (319)；
(9) prefilmer (315) is received using reception device (301)；
(10) remaining corrosion inhibiter dump valve (304) is opened, remaining corrosion inhibiter is flowed into through remaining corrosion inhibiter outlet (305) remaining
Corrosion inhibiter collector (306)；
(11) pull down the first Yu Mo areas (309), the second Yu Mo areas (310), the 3rd Yu Mo areas (311) installation treat pre- membrane tube line
(319), preparation is assemblied in corrosion test area (14) and tested.
8. a kind of corrosion inhibiter according to claim 5 preferably and antiseptic effect evaluation test method, it is characterised in that it is described
Corrosion inhibiter residual concentration analysis method, including：Quick detection equipment, ultraviolet light spectrophotometer, visible light light-splitting degree meter.
9. a kind of corrosion inhibiter according to claim 5 preferably and antiseptic effect evaluation test method, it is characterised in that it is described
Corrosion rate detecting step is：
(1) the pre- membrane tube line inwall after dichloromethane solution water-wash test is used；
(2) dichloromethane solution after cleaning is collected using surge drum；
(3) surge drum for filling dichloromethane solution is put into the dichloromethane removed in rotary evaporator in solution；
(4) solution for removing dichloromethane is placed on and weighed up in advance in the aluminium dish of weight, is put into 55 DEG C of vacuum drying oven, dried
Afterwards, aluminium dish is weighed again, resulting weight difference is exactly inhibition dosage remaining after pre- membrane tube line inwall is tested；
(5) dried pre- membrane tube line is weighed, is accurate to 0.1g, calculate corrosion rate.
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