CN108872055A - A kind of pre- deoxygenation detection of corrosion test solution and chemicals dosing plant and method - Google Patents
A kind of pre- deoxygenation detection of corrosion test solution and chemicals dosing plant and method Download PDFInfo
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- CN108872055A CN108872055A CN201810866358.0A CN201810866358A CN108872055A CN 108872055 A CN108872055 A CN 108872055A CN 201810866358 A CN201810866358 A CN 201810866358A CN 108872055 A CN108872055 A CN 108872055A
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- 238000006392 deoxygenation reaction Methods 0.000 title claims abstract description 142
- 238000005260 corrosion Methods 0.000 title claims abstract description 126
- 230000007797 corrosion Effects 0.000 title claims abstract description 126
- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000012085 test solution Substances 0.000 title claims abstract description 19
- 239000000126 substance Substances 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 185
- 238000012360 testing method Methods 0.000 claims abstract description 185
- 239000001301 oxygen Substances 0.000 claims abstract description 174
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 174
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 171
- 239000000243 solution Substances 0.000 claims abstract description 15
- 239000003814 drug Substances 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 8
- 230000002000 scavenging effect Effects 0.000 claims description 56
- 238000003760 magnetic stirring Methods 0.000 claims description 14
- 238000004090 dissolution Methods 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 238000013019 agitation Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 230000008676 import Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 241001411320 Eriogonum inflatum Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000023753 dehiscence Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
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Abstract
The invention discloses a kind of pre- deoxygenation detection of corrosion test solution and chemicals dosing plant and methods, including pre- deoxygenation, the system of falling liquid, dissolved oxygen detection system, corrosion test container, medicine system, High Purity Nitrogen gas cylinder and exhaust collection container, the present invention is to carry out pre- deoxygenation completely to testing liquid, and monitor whether dissolved oxygen content in solution meets test requirements document, until pre- deoxygenation, which is finished, imports experimental rig progress corrosion test for testing liquid after pipeline once connects in place simultaneously, it need not carry out pipeline and dismount work, pre- deoxygenation is prevented, dissolved oxygen that may be present is mixed into and the problems such as corrosion inhibiter is volatile in the handoff procedure of falling liquid, it ensure that corrosion test carries out in fully controllable oxygen-free environment in all its bearings.
Description
Technical field
The present invention relates to material corrosion experimental test fields, and in particular to a kind of pre- deoxygenation detection of corrosion test solution and
Chemicals dosing plant and method, the simulation operating condition corrosion test that dissolved oxygen content is strict with suitable for testing liquid are especially suitable
For realizing the oxygen-free environment (dissolved oxygen content is ppb trace rank) in the acquisitions and conveyance conduit such as petroleum, natural gas, and can
For evaluating volatile vapour phase inhibitor to the inhibition efficiency of tubing.
Background technique
The corrosion behavior for being research material in its local environment, rule and the corrosion mitigating effect for evaluating corrosion inhibiter, need
Carry out the material corrosion resistance evaluation and test under simulation field working conditions environmental condition.In oil and gas industry, petroleum pipe
H locating for inside locating corrosive environment, especially oil/gas well tubing string and gathering line2S/CO2Corrosive environment is oxygen-free environment,
Dissolved oxygen content is ppb trace rank.For H2S/CO2Most of type of inhibitor of corrosive environment be not antioxygen gas corrosion at
Membranous type corrosion inhibiter.Pertinent literature and field measurement data all show in H2S/CO2In corrosive environment, dissolved oxygen is as a kind of strong oxygen
Agent, even if can also be had a huge impact to corrosion rate, or even corrosion rate can be increased to several times, seriously containing micro
Affect the validity and reproducibility of corrosion rate test result.
For the accuracy and reproducibility for promoting corrosion test data, home and abroad relevant criterion is all to molten in testing liquid
Solution oxygen content claims, ASTM G170-2006《In the corrosion inhibiter of laboratory evaluation and qualification oil field and refinery
Standard guide》And NACE 0177-2016《Metal stress corrosion dehiscence resistant in hydrogen-sulfide environmental is tested》, all require test
Oxygen concentration requirement in solution<5ppb (best 1ppb).But to specific deoxidation method, deoxygenation time and detection mode not into
Row illustrates.
Laboratory is often used there are two types of Deoxidization methods at present, and one is sample is linked into the high temperature and high pressure kettle full of etchant solution
In equal test chambers, deoxygenation operation is carried out to testing liquid after sealing.This Deoxidization method has the following problems：
(1) contacted in advance due to sample with the etchant solution containing dissolved oxygen so that dissolved oxygen to corrosion test result very
It is big to influence.Practical anaerobic operating condition cannot be simulated completely.
(2) it can not detect whether determining content of oxygen dissolved in water meets test requirements document, can only be commented by personal experience
Sentence, test operation repeatability is poor.
(3) it will certainly will be had been added in the oxygen removal process to etchant solution for the vapour phase inhibitor of high volatility
Volatile components remove in vapour phase inhibitor in kettle, affect the accuracy of inhibition efficiency evaluation result.
Another kind is to carry out pre- deoxygenation for testing liquid in such a way that vial adds rubber seal plug.But this kind of deoxygenation
Input pressure is slightly larger or fluctuation due to not pressure-bearing, when deoxygenation for device, can eject rubber seal bottle stopper, the entirety for influencing device is close
Feng Xing.When carrying out deoxygenation and the operation of falling liquid, since deoxygenation and Liquid pouring pipe road separate, pipeline need to be dismounted, at this time may
It is mixed into dissolved oxygen.Thus it cannot be guaranteed that testing liquid deoxygenation it is thorough, while also can not to the dissolved oxygen content in experimental solutions into
Row real-time monitoring, it is ensured that dissolved oxygen content reaches ppb rank.
Summary of the invention
The purpose of the present invention is to provide a kind of pre- deoxygenation detection of corrosion test solution and chemicals dosing plant and method, with gram
Problem of the existing technology is taken, the present invention monitors dissolved oxygen in solution and contain to carry out pre- deoxygenation completely to testing liquid
Until pre- deoxygenation finishes testing liquid importing experimental rig after whether amount meets test requirements document, while pipeline once connects in place
Corrosion test is carried out, work is dismounted without pipeline is carried out, has prevented pre- deoxygenation, dissolved oxygen that may be present in the handoff procedure of falling liquid
Be mixed into and the problems such as corrosion inhibiter is volatile, ensure that in all its bearings corrosion test in fully controllable oxygen-free environment into
Row.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of pre- deoxygenation detection of corrosion test solution and chemicals dosing plant, including pre- deoxygenation, the system of falling liquid, dissolved oxygen detection
System, corrosion test container, medicine system, High Purity Nitrogen gas cylinder and exhaust collection container；
The pre- deoxygenation, the system of falling liquid include pre- oxygen scavenging container lid, pre- oxygen scavenging container body and pre- deoxygenation, the valve group of falling liquid, in advance
Oxygen scavenging container lid is connected on pre- oxygen scavenging container body, and pre- deoxygenation, the valve group of falling liquid pass through the first shared pipeline and the second shared pipeline
It is connect with pre- oxygen scavenging container lid；
The pre- deoxygenation, the valve group of falling liquid include that pre- deoxygenation inlet ductwork, pre- deoxygenation air inlet pipeline, intake valve, pre- deoxygenation go out
Air pipe, air outlet valve, the inlet ductwork of falling liquid, liquid feed valve, the export pipeline of falling liquid, liquid valve, Liquid pouring pipe road, the valve of falling liquid, pre- deoxygenation
Pipeline, pre- deoxygenation valve and gas-drying apparatus, the pre- deoxygenation inlet ductwork, pre- deoxygenation air inlet pipeline, the inlet ductwork of falling liquid pass through
Threeway is connected；The pre- deoxygenation air inlet pipeline, the first shared pipeline, the export pipeline of falling liquid are connected by threeway；It is described fall
Liquid inlet ductwork, pre- deoxygenation outlet pipe, the second shared pipeline are connected by threeway；The pre- deoxygenation outlet pipe, the liquid that falls
Export pipeline, Liquid pouring pipe road, pre- deoxygenation pipeline are connected by four-way；Intake valve is installed on the pre- deoxygenation air inlet pipeline, in advance
Air outlet valve is installed on deoxygenation outlet pipe, liquid feed valve is installed in the inlet ductwork of falling liquid, liquid valve is installed, on the export pipeline of falling liquid
The valve of falling liquid is installed on liquid pipeline, pre- deoxygenation valve and gas-drying apparatus is connected in series on pre- deoxygenation pipeline；
The pre- deoxygenation, the system of falling liquid are connected by pre- deoxygenation inlet ductwork with High Purity Nitrogen gas cylinder, Liquid pouring pipe road and pre-
Deoxygenation pipeline is connected by three-way connection with the corrosion test vessel inlet pipeline being connected on corrosion test container, medicine system
It is connected by dosing pipe with pre- oxygen scavenging container lid, the dissolved oxygen test inlet ductwork and dissolved oxygen of dissolved oxygen test macro are surveyed
Examination export pipeline is connected with pre- oxygen scavenging container lid, and corrosion test container is received by corrosion test container outlet pipeline and tail gas
Collection container is connected.
Further, it is provided with magnetic stirring apparatus below pre- oxygen scavenging container body, is provided in pre- oxygen scavenging container body and magnetic
The magneton of power blender cooperation.
Further, pre- oxygen scavenging container lid and pre- oxygen scavenging container body be by butterfly-type screw connection, and pre- oxygen scavenging container lid with
O-ring seal is provided between pre- oxygen scavenging container body.
Further, dosing liquid feed valve and dosing liquid valve are connected in series on dosing pipe.
Further, dissolved oxygen test inlet ductwork on be sequentially connected in series dissolving test inlet valve, dissolution oxygen detection and
Circulating pump, dissolved oxygen, which is tested on export pipeline, is equipped with dissolved oxygen test outlet valve.
Further, corrosion test vessel inlet valve, corrosion test container are installed on corrosion test vessel inlet pipeline
The corrosion test that is installed in series on export pipeline container outlet valve and check valve.
A kind of pre- deoxygenation detection of corrosion test solution and adding method thereof, include the following steps：
Step 1：Testing liquid is poured into pre- oxygen scavenging container body, pre- oxygen scavenging container lid is covered；
Step 2：Prepared corrosion inhibiter is added and is stored in liquid feeding pipeline；
Step 3：Intake valve, air outlet valve, pre- deoxygenation valve are successively opened, simultaneously to testing liquid and corrosion experiment container
Pre- deoxygenation is carried out, while dissolved oxygen content in testing liquid is monitored using dissolved oxygen test macro；
Step 4：After dissolved oxygen content meets test requirements document in testing liquid, dissolved oxygen test macro, intake valve are closed
And air outlet valve, testing liquid is added in the corrosion inhibiter in dosing pipe, is then shut off dosing pipe and pre- deoxygenation valve, pre- deoxygenation
Process finishes；
Step 5：Liquid feed valve, liquid valve, the valve of falling liquid are successively opened, the testing liquid after deoxygenation is imported into corrosion test and is held
In device.
Further, dosing liquid feed valve and dosing liquid valve are connected in series on dosing pipe；
Dissolving test inlet valve, dissolution oxygen detection and circulating pump have been sequentially connected in series in dissolved oxygen test inlet ductwork, it is molten
Dissolved oxygen test outlet valve is installed on solution oxygen test export pipeline；
Corrosion test vessel inlet valve, corrosion test tank outlet pipe road are installed on corrosion test vessel inlet pipeline
The corrosion test that is installed in series container outlet valve and check valve.
Further, testing liquid is poured into pre- oxygen scavenging container body in step 1, covers pre- oxygen scavenging container lid, and make institute
There is valve to be in close state；
Dosing liquid feed valve is opened in step 2, and prepared corrosion inhibiter pipettor is added and is stored in liquid feeding pipeline
In, simultaneously close off dosing liquid feed valve；
Intake valve, air outlet valve, pre- deoxygenation valve, corrosion test vessel inlet valve, corrosion test is successively opened in step 3 to hold
Device outlet valve carries out pre- deoxygenation to testing liquid and corrosion experiment container simultaneously, opens dissolved oxygen and tests inlet valve, dissolved oxygen
Outlet valve is tested, circulating pump and dissolved oxygen tester is opened, the dissolved oxygen content in testing liquid is monitored；
In step 4 after dissolved oxygen tester shows that the dissolved oxygen content in testing liquid meets test requirements document, close molten
Oxygen test inlet valve, dissolved oxygen test outlet valve, intake valve, air outlet valve are solved, dosing liquid valve is opened, it will be slow in dosing pipe
After losing agent addition testing liquid, closes dosing liquid valve and pre- deoxygenation valve, pre- oxygen removal process finish；
Liquid feed valve, liquid valve, the valve of falling liquid are successively opened in step 5, and the testing liquid after deoxygenation is imported into corrosion test and is held
In device, after liquid, corrosion test vessel inlet valve and corrosion test container outlet valve are closed, completes the process of falling liquid.
Further, it is provided with magnetic stirring apparatus below pre- oxygen scavenging container body, is provided in pre- oxygen scavenging container body and magnetic
The magneton of power blender cooperation；
When carrying out pre- deoxygenation simultaneously to testing liquid and corrosion experiment container in step 3, magnetic stirring apparatus is opened, with
50-80 revs/min of revolving speed is stirred solution.
Compared with prior art, the invention has the following beneficial technical effects：
Apparatus of the present invention monitor whether dissolved oxygen content in solution meets to carry out pre- deoxygenation completely to testing liquid
Test requirements document, while pipeline once connects rear in place until pre- deoxygenation, which is finished, carries out corrosion examination for testing liquid importing experimental rig
It tests, dismounts work without pipeline is carried out, prevented that pre- deoxygenation, dissolved oxygen that may be present is mixed into and delays in the handoff procedure of falling liquid
The problems such as agent is volatile is lost, ensure that corrosion test carries out in fully controllable oxygen-free environment in all its bearings.
Further, by the way that magnetic stirring apparatus is arranged, when carrying out pre- deoxygenation, magnetic stirring apparatus is opened, can be promoted and be removed
Oxygen efficiency.
Since the method for the present invention testing liquid to be added to pre- oxygen scavenging container body, until the testing liquid after deoxygenation is imported
In corrosion test container, work is dismounted without pipeline is carried out, has prevented pre- deoxygenation, dissolution that may be present in the handoff procedure of falling liquid
The problems such as oxygen is mixed into and corrosion inhibiter is volatile, ensure that in all its bearings corrosion test in fully controllable oxygen-free environment into
Row, and be monitored in oxygen removal process squadron oxygen content, it is ensured that dissolved oxygen content reaches ppb rank.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein, 1, intake valve；2, air outlet valve；3, liquid feed valve；4, liquid valve；5, the valve of falling liquid；6, pre- deoxygenation valve；7, gas is dry
Dry device；8, dosing liquid feed valve；9, dosing liquid valve；10, dissolved oxygen tests inlet valve；11, oxygen detection is dissolved；12, circulating pump；
13, dissolved oxygen tests outlet valve；14, pre- oxygen scavenging container body；15, pre- oxygen scavenging container lid；16, butterfly-type screw；17, O-ring seal；
18, magnetic stirring apparatus；19, magneton；20, corrosion test container；21, exhaust collection container；22, corrosion test vessel inlet valve；
23, corrosion test container outlet valve；24, check valve；25, High Purity Nitrogen gas cylinder；26, pre- deoxygenation inlet ductwork；27, the inlet tube of falling liquid
Road；28, pre- deoxygenation outlet pipe；29, the export pipeline of falling liquid；30, Liquid pouring pipe road；31, pre- deoxygenation pipeline；32, corrosion test is held
Device export pipeline；33, dissolved oxygen tests inlet ductwork；34, dissolved oxygen tests export pipeline；35, corrosion test vessel inlet pipe
Road；36, dosing pipe；37, pre- deoxygenation air inlet pipeline；38, the first shared pipeline；39, the second shared pipeline.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing：
Referring to Fig.1, a kind of pre- deoxygenation detection of corrosion test solution and chemicals dosing plant, including pre- deoxygenation, the system of falling liquid, it is molten
Solve oxygen detection system, corrosion test container 20, medicine system, magnetic stirring apparatus, exhaust collection container 21.Wherein, pre- deoxygenation, fall
Liquid system is connected by pre- deoxygenation inlet ductwork 26 with High Purity Nitrogen gas cylinder 25；Two parallel pipeline Liquid pouring pipe roads 30 and pre- deoxygenation
Pipeline 31 is connected by three-way connection with corrosion test vessel inlet pipeline 35.The dosing pipe 36 of medicine system passes through sealing spiral shell
Line is connected with the pre- oxygen scavenging container lid 15 of pre- deoxygenation, the system of falling liquid.The dissolved oxygen of dissolved oxygen test macro tests inlet ductwork
33 and dissolved oxygen test export pipeline 34 respectively by seal screw thread be connected with the pre- oxygen scavenging container lid 15 of pre- deoxygenation, the system of falling liquid
It connects.Corrosion test container is connected by corrosion test container outlet pipeline 32 with exhaust collection container 21.Magnetic stirring apparatus 18
It is placed in pre- 14 lower section of oxygen scavenging container body；Magneton 19 is placed in inside pre- oxygen scavenging container body 14.
Referring to Fig.1, the pre- deoxygenation, the system of falling liquid are by pre- deoxygenation, the valve group of falling liquid, pre- oxygen scavenging container lid 15, pre- deoxygenation
Container body 14, butterfly-type screw 16, O-ring seal 17 form.Pre- oxygen scavenging container lid 15 passes through butterfly-type screw 16 and pre- oxygen scavenging container
Body 14 is connected, and realizes sealing by O-ring seal 17；Pre- deoxygenation, the valve group of falling liquid pass through 38 and of the first shared pipeline respectively
Second shared pipeline 39 is threadedly coupled with the sealing of pre- oxygen scavenging container lid 15.
Referring to Fig.1, the pre- deoxygenation, the valve group of falling liquid are by pre- deoxygenation inlet ductwork 26, pre- deoxygenation air inlet pipeline 37, air inlet
Valve 1, pre- deoxygenation outlet pipe 28, air outlet valve 2, the first shared pipeline 38, the second shared pipeline 39, the inlet ductwork of falling liquid 27, into
Liquid valve 3, the export pipeline of falling liquid 29, liquid valve 4, Liquid pouring pipe road 30, the valve of falling liquid 5, pre- deoxygenation pipeline 31, pre- deoxygenation valve 6, gas are dry
Dry device 7 forms.Pre- deoxygenation inlet ductwork 26, pre- deoxygenation air inlet pipeline 37, the inlet ductwork of falling liquid 27 are connected by threeway.It removes in advance
Oxygen air inlet pipeline 37, the first shared pipeline 38, the export pipeline of falling liquid 29 are connected by threeway.The inlet ductwork of falling liquid 27 is removed in advance
Oxygen outlet pipe 28, the second shared pipeline 39 are connected by threeway.Pre- deoxygenation outlet pipe 28, falls at the export pipeline of falling liquid 29
Liquid pipeline 30, pre- deoxygenation pipeline 31 are connected by four-way.Intake valve 1, pre- deoxygenation outlet are installed on pre- deoxygenation air inlet pipeline 37
Air outlet valve 2 is installed on pipeline 28, liquid feed valve 3 is installed in the inlet ductwork of falling liquid 27, liquid valve 4 is installed on the export pipeline of falling liquid 29,
The valve of falling liquid 5 is installed on Liquid pouring pipe road 30, pre- deoxygenation valve 6, gas-drying apparatus 7 is connected in series on pre- deoxygenation pipeline 31.
Referring to Fig.1, the medicine system is made of dosing pipe 36, dosing liquid feed valve 8, dosing liquid valve 9.Chemical feed pipe
Dosing liquid feed valve 8 and dosing liquid valve 9 are connected in series on road 36.
Referring to Fig.1, the dissolved oxygen detection system tests inlet valve by dissolved oxygen test inlet ductwork 33, dissolved oxygen
10, dissolved oxygen test export pipeline 34, dissolved oxygen test outlet valve 13, dissolution oxygen detection 11 and circulating pump 12 form.Dissolution
Dissolved oxygen test inlet valve 10, dissolution oxygen detection 11 and circulating pump 12 are sequentially connected in series in oxygen test inlet ductwork 33.Dissolved oxygen
Test outlet valve 13 is mounted on dissolved oxygen test export pipeline 34.
Referring to Fig.1, corrosion test vessel inlet pipeline 35, corrosion test container outlet are connected on corrosion test container 20
Pipeline 32 is connected with corrosion test vessel inlet valve 22, corrosion test tank outlet pipe on corrosion test vessel inlet pipeline 35
It is installed in series on road 32 and is made of corrosion test container outlet valve 23, check valve 24.
Pre- oxygen scavenging container lid, pre- oxygen scavenging container body and all connecting line materials are all made of non-magnetic 316L stainless steel,
Sealed connection mode used is NPT thread seal, and dissolved oxygen test loop pump is gear pump, and dissolved oxygen tester oxygen measuring probe is adopted
With light sensing measurement principle, measurement accuracy is ppb grades.
A kind of pre- deoxygenation of corrosion test solution and adding method thereof, include the following steps：
Step 1: pre- deoxygenation, the system of falling liquid are connected by pre- deoxygenation inlet ductwork 26 with High Purity Nitrogen gas cylinder 25.Dissolution
The dissolved oxygen test inlet ductwork 33 and dissolved oxygen test export pipeline 34 of oxygen test macro are respectively by sealing screw thread and removing in advance
Oxygen, the system of falling liquid pre- oxygen scavenging container lid 15 be connected.Corrosion test container passes through corrosion test container outlet pipeline 32 and tail
Gas collection vessel 21 is connected.The dosing pipe 36 of medicine system passes through sealing screw thread and pre- deoxygenation, the pre- deoxygenation for the system of falling liquid
Container cover 15 is connected.Magnetic stirring apparatus 18 is placed in pre- 14 lower section of oxygen scavenging container body, and magneton 19 is placed in pre- oxygen scavenging container body
Inside 14.And ensure that all valves are in close state.
Step 2: testing liquid is poured into pre- oxygen scavenging container body 14, pre- oxygen scavenging container body 14 is connected with butterfly-type screw 16
With pre- oxygen scavenging container lid 15, and in centre place O-ring sealing.And ensure that all valves are in close state.
Step 3: opening dosing liquid feed valve 8 if you need to carry out corrosion inhibiter evaluation, prepared corrosion inhibiter pipettor being added
Enter and be stored in liquid feeding pipeline, closes dosing liquid feed valve 8.
Step 4: successively opening intake valve 1, air outlet valve 2, pre- deoxygenation valve 6, corrosion test vessel inlet valve 22, corrosion examination
Container outlet valve 23 is tested, pre- deoxygenation is carried out simultaneously to testing liquid and corrosion experiment container.Magnetic stirring apparatus is opened, with 50-
80 revs/min of revolving speed is stirred solution, promotes oxygen removal efficiency.Open dissolved oxygen test inlet valve 10, dissolved oxygen tests out
Mouth valve 13, opens circulating pump 12 and dissolved oxygen tester 11, is monitored to the dissolved oxygen content in testing liquid.
Step 5: closing dissolved oxygen after dissolved oxygen tester shows that the dissolved oxygen content in solution meets test requirements document
Test inlet valve 10, dissolved oxygen tests outlet valve 13, intake valve 1, air outlet valve 2.If you need to evaluate corrosion inhibiter, dosing liquid valve is opened
9, after testing liquid is added in the corrosion inhibiter in dosing pipe 36, close dosing liquid valve 9 and pre- deoxygenation valve 6, pre- deoxygenation
Journey finishes.
Step 6: successively opening liquid feed valve 3, liquid valve 4, the valve of falling liquid 5, the testing liquid after deoxygenation is imported into corrosion test
In container 20, after liquid, corrosion test vessel inlet valve 22 and corrosion test container outlet valve 23 are closed, completes liquid
Process.
Claims (10)
1. a kind of pre- deoxygenation detection of corrosion test solution and chemicals dosing plant, which is characterized in that including pre- deoxygenation, the system of falling liquid,
Dissolved oxygen detection system, corrosion test container (20), medicine system, High Purity Nitrogen gas cylinder (25) and exhaust collection container (21)；
The pre- deoxygenation, the system of falling liquid include pre- oxygen scavenging container lid (15), pre- oxygen scavenging container body (14) and pre- deoxygenation, the valve of falling liquid
Group, pre- oxygen scavenging container lid (15) are connected on pre- oxygen scavenging container body (14), and pre- deoxygenation, the valve group of falling liquid pass through the first shared pipeline
(38) it is connect with the second shared pipeline (39) with pre- oxygen scavenging container lid (15)；
The pre- deoxygenation, the valve group of falling liquid include pre- deoxygenation inlet ductwork (26), pre- deoxygenation air inlet pipeline (37), intake valve (1), pre-
Deoxygenation outlet pipe (28), air outlet valve (2), the inlet ductwork of falling liquid (27), liquid feed valve (3), the export pipeline of falling liquid (29), liquid valve
(4), Liquid pouring pipe road (30), the valve of falling liquid (5), pre- deoxygenation pipeline (31), pre- deoxygenation valve (6) and gas-drying apparatus (7), it is described pre- to remove
Oxygen inlet ductwork (26), pre- deoxygenation air inlet pipeline (37), the inlet ductwork of falling liquid (27) are connected by threeway；The pre- deoxygenation into
Air pipe (37), the first shared pipeline (38), the export pipeline of falling liquid (29) are connected by threeway；The inlet ductwork of falling liquid
(27), pre- deoxygenation outlet pipe (28), the second shared pipeline (39) are connected by threeway；The pre- deoxygenation outlet pipe
(28), the export pipeline of falling liquid (29), Liquid pouring pipe road (30), pre- deoxygenation pipeline (31) are connected by four-way；The pre- deoxygenation into
Intake valve (1) is installed on air pipe (37), air outlet valve (2) are installed on pre- deoxygenation outlet pipe (28), the inlet ductwork of falling liquid (27)
Upper installation liquid feed valve (3) installs liquid valve (4) on the export pipeline of falling liquid (29), installs the valve of falling liquid (5) on Liquid pouring pipe road (30),
Pre- deoxygenation valve (6) and gas-drying apparatus (7) are connected in series on pre- deoxygenation pipeline (31)；
The pre- deoxygenation, the system of falling liquid are connected by pre- deoxygenation inlet ductwork (26) with High Purity Nitrogen gas cylinder (25), Liquid pouring pipe road
(30) and pre- deoxygenation pipeline (31) passes through three-way connection and the corrosion test vessel inlet being connected on corrosion test container (20)
Pipeline (35) is connected, and medicine system is connected by dosing pipe (36) with pre- oxygen scavenging container lid (15), dissolved oxygen test macro
Dissolved oxygen test inlet ductwork (33) and dissolved oxygen test export pipeline (34) be connected with pre- oxygen scavenging container lid (15), corruption
Corrosion test container (20) is connected by corrosion test container outlet pipeline (32) with exhaust collection container (21).
2. a kind of pre- deoxygenation detection of corrosion test solution according to claim 1 and chemicals dosing plant, which is characterized in that pre-
It is provided with magnetic stirring apparatus (18), is provided in pre- oxygen scavenging container body (14) and magnetic stirring apparatus below oxygen scavenging container body (14)
(18) magneton (19) cooperated.
3. a kind of pre- deoxygenation detection of corrosion test solution according to claim 1 and chemicals dosing plant, which is characterized in that pre-
Oxygen scavenging container lid (15) and pre- oxygen scavenging container body (14) are connect by butterfly-type screw (16), and pre- oxygen scavenging container lid (15) with remove in advance
O-ring seal (17) are provided between oxygen container body (14).
4. a kind of pre- deoxygenation detection of corrosion test solution according to claim 1 and chemicals dosing plant, which is characterized in that add
Dosing liquid feed valve (8) and dosing liquid valve (9) are connected in series on pencil road (36).
5. a kind of pre- deoxygenation detection of corrosion test solution according to claim 1 and chemicals dosing plant, which is characterized in that molten
Dissolving test inlet valve (10), dissolution oxygen detection (11) and circulating pump have been sequentially connected in series in solution oxygen test inlet ductwork (33)
(12), dissolved oxygen test outlet valve (13) is installed in dissolved oxygen test export pipeline (34).
6. a kind of pre- deoxygenation detection of corrosion test solution according to claim 1 and chemicals dosing plant, which is characterized in that rotten
Corrosion test vessel inlet valve (22), corrosion test container outlet pipeline (32) are installed on corrosion test vessel inlet pipeline (35)
On be installed in series corrosion test container outlet valve (23) and check valve (24).
7. a kind of pre- deoxygenation detection of corrosion test solution and adding method thereof, using corrosion test described in claim 1 with molten
The pre- deoxygenation detection of liquid and chemicals dosing plant, which is characterized in that include the following steps：
Step 1：Testing liquid is poured into pre- oxygen scavenging container body (14), pre- oxygen scavenging container lid (15) is covered；
Step 2：Prepared corrosion inhibiter is added and is stored in liquid feeding pipeline (36)；
Step 3：Intake valve (1), air outlet valve (2), pre- deoxygenation valve (6) are successively opened, to testing liquid and corrosion experiment container
(20) pre- deoxygenation is carried out simultaneously, while dissolved oxygen content in testing liquid is monitored using dissolved oxygen test macro；
Step 4：After dissolved oxygen content meets test requirements document in testing liquid, dissolved oxygen test macro, intake valve (1) are closed
With air outlet valve (2), testing liquid is added in the corrosion inhibiter in dosing pipe (36), dosing pipe (36) is then shut off and removes in advance
Oxygen valve (6), pre- oxygen removal process finish；
Step 5：Liquid feed valve (3), liquid valve (4), the valve of falling liquid (5) are successively opened, the testing liquid after deoxygenation is imported into corrosion examination
It tests in container (20).
8. a kind of pre- deoxygenation detection of corrosion test solution according to claim 7 and adding method thereof, which is characterized in that add
Dosing liquid feed valve (8) and dosing liquid valve (9) are connected in series on pencil road (36)；
It has been sequentially connected in series dissolving test inlet valve (10), dissolution oxygen detection (11) in dissolved oxygen test inlet ductwork (33) and has followed
Ring pumps (12), and dissolved oxygen test outlet valve (13) is equipped in dissolved oxygen test export pipeline (34)；
Corrosion test vessel inlet valve (22), corrosion test tank outlet pipe are installed on corrosion test vessel inlet pipeline (35)
The corrosion test container outlet valve that is installed in series on road (32) (23) and check valve (24).
9. a kind of pre- deoxygenation detection of corrosion test solution according to claim 8 and adding method thereof, which is characterized in that step
Testing liquid is poured into pre- oxygen scavenging container body (14) in rapid one, covers pre- oxygen scavenging container lid (15), and be in all valves
Closed state；
Dosing liquid feed valve (8) are opened in step 2, prepared corrosion inhibiter pipettor is added and is stored in liquid feeding pipeline
(36) in, dosing liquid feed valve (8) are simultaneously closed off；
Intake valve (1), air outlet valve (2), pre- deoxygenation valve (6), corrosion test vessel inlet valve (22), corruption are successively opened in step 3
Corrosion test container outlet valve (23) carries out pre- deoxygenation to testing liquid and corrosion experiment container (20) simultaneously, opens dissolved oxygen
Inlet valve (10), dissolved oxygen test outlet valve (13) are tested, circulating pump (12) and dissolved oxygen tester (11) are opened, to test
Dissolved oxygen content in solution is monitored；
In step 4 after dissolved oxygen tester (11) show that the dissolved oxygen content in testing liquid meets test requirements document, close molten
Solve oxygen test inlet valve (10), dissolved oxygen tests outlet valve (13), intake valve (1), air outlet valve (2), opening dosing liquid valve
(9), after testing liquid being added in the corrosion inhibiter in dosing pipe (36), dosing liquid valve (9) and pre- deoxygenation valve (6) are closed,
Pre- oxygen removal process finishes；
Liquid feed valve (3), liquid valve (4), the valve of falling liquid (5) are successively opened in step 5, and the testing liquid after deoxygenation is imported into corrosion
In test chamber (20), after liquid, corrosion test vessel inlet valve (22) and corrosion test container outlet valve are closed
(23), the process of falling liquid is completed.
10. a kind of pre- deoxygenation detection of corrosion test solution according to claim 7 and adding method thereof, which is characterized in that
It is provided with magnetic stirring apparatus (18), is provided in pre- oxygen scavenging container body (14) and magnetic agitation below pre- oxygen scavenging container body (14)
The magneton (19) of device (18) cooperation；
When carrying out pre- deoxygenation simultaneously to testing liquid and corrosion experiment container (20) in step 3, magnetic stirring apparatus is opened
(18), solution is stirred with 50-80 revs/min of revolving speed.
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