CN104785416A - High sulfur gas field gathering pipeline and pressure container inner wall online coating technology - Google Patents
High sulfur gas field gathering pipeline and pressure container inner wall online coating technology Download PDFInfo
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- CN104785416A CN104785416A CN201510110711.9A CN201510110711A CN104785416A CN 104785416 A CN104785416 A CN 104785416A CN 201510110711 A CN201510110711 A CN 201510110711A CN 104785416 A CN104785416 A CN 104785416A
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Abstract
The invention relates to a high sulfur gas field gathering pipeline and pressure container inner wall coating anticorrosion technology. The high sulfur gas field gathering pipeline and pressure container inner wall online coating technology comprises the following steps: 1, switching flow: isolating a coating object from a system; 2, displacing gas: displaying acidic gas in the coating object; 3, connecting flow: connecting the coating object with a coating device; 4, injecting a corrosion inhibitor: injecting the corrosion inhibitor into the coating object; 5, establishing cycle: forming a corrosion inhibitor flow cycle between the coating object and the coating device; 6, immersing in the corrosion inhibitor: carrying out immersion coating by adding the corrosion inhibitor into the coating object; 7, extracting medicine: completely extracting the corrosion inhibitor from the coating object; 8, inspecting quality: inspecting and evaluating the quality of the coating effect; and 9, recovering the flow: recovering normal running flow of the coating object. The technology allows a film with the thickness of greater than 80[mu]m to be formed on the inner wall of an internal pipeline and a pressure container within a short time, so the corrosion of the pipeline and the pressure container is effectively alleviated.
Description
Technical field
The present invention relates to a kind of high sulfur Gas Fields surface gathering system pipeline and internal pressure vessel walls film anticorrosion technology.
Background technology
Owing to being in for a long time in the sour gas environment of high concentration, very easily there is corrosion phenomenon in high sulfur Gas Fields surface gathering system pipeline and pressure vessel, brings great potential safety hazard to the normal operation of pipeline and pressure vessel.And traditional high sulfur Gas Fields surface gathering system pipeline and the construction of internal pressure vessel walls film anticorrosion, there is the problems such as the construction operation cycle is grown, construction operation must stop production, construction operation potential safety hazard is large.For above problem, we need a kind of can fast, high sulfur Gas Fields surface gathering system pipeline that is online, safety and internal pressure vessel walls film anticorrosion technology.
Summary of the invention
The object of the invention is to provide a kind of high sulfur Gas Fields surface gathering system pipeline and the online film anticorrosion technology of internal pressure vessel walls for the deficiencies in the prior art, technology provided by the invention can fast, the film anticorrosion construction working completed pipeline and pressure vessel that is online, safety.
Technical scheme of the present invention is:
High sulfur Gas Fields gathering line and the online technology for coating of internal pressure vessel walls, comprise the following steps:
(1) equipment, tube pass switch, and by closing film object upper end material inlet valve and film object lower end discharge valve, then opening by-pass line valve, making it be circulated by by-pass line, thus film object is isolated system;
(2) gas displacement, becomes inert gas by inner for film object acid gas displacement;
(3) flow process connects, and after device for coating input duct being connected to film object upper end material inlet valve, device for coating circulating line being connected to device for coating circulation valve, completing the connection of film object and device for coating;
(4) inject corrosion inhibiter, open device for coating liquid flowing valve, by coating device, corrosion inhibiter is injected in film object;
(5) set up circulation, open device for coating circulation valve, open the corrosion inhibiter circulating pump on device for coating, corrosion inhibiter is flow circuit in film object, makes to form corrosion inhibiter flow circuit between film object and device for coating;
(6) corrosion inhibiter soaks, and corrosion inhibiter soaks film in film object inside;
(7) extract medicament out, closedown device for coating liquid flowing valve after film completes, open the self priming pump on device for coating, extract the unnecessary corrosion inhibiter in film object out emptying;
(8) inspection of quality, carries out inspection of quality and evaluation to film effect;
(9) recover flow process, remove and connect flow process, remove device for coating feed liquor pipeline, remove device for coating pipeloop; Open film object lower end discharge valve, open film object upper end material inlet valve; Close by-pass line valve, recover the normal operational process of film object.
Concrete, the mode that the gas displacement described in described step (2) adopts nitrogen to purge, purging pressure is 0.5-1.0MPa, purge time 20-30min.。
Concrete, the device for coating used in described step (3) comprises suction pump, self priming pump, circulating pump, liquid level take into account high pressure by-pass line, and its voltage withstand class is greater than 10MPa.
Concrete, the plastics described in described step (4) is corrosion inhibiter, and this corrosion inhibiter is oil-soluble inhibitor, and concentration is 100wt.%.
Concrete, described in described step (5), corrosion inhibiter flow circuit comprises the common circulation of pipeline and pressure vessel, and rate of circulating flow is 1-3m/s, and circulation timei is 5-10min.
Concrete, the corrosion inhibiter soak time described in described step (6) is 5-10min.
Concrete, the corrosion inhibiter raffinate of film object inside blows out by mode further that adopt nitrogen to purge after extracting the inner unnecessary corrosion inhibiter of film object in described step (7) out.
Concrete, what described step (8) carried out that the examination and evaluating of quality adopts to film effect is evaluation method to thickness, and its pipeline coating thickness computing formula is as follows:
H: coating thickness, unit μm;
V
0: total amount before corrosion inhibiter film, unit m3;
V
1: total amount after corrosion inhibiter film, unit m3;
D: film internal diameter of the pipeline, unit mm;
Pressure vessel and equipment coating thickness computing formula is as follows:
H: coating thickness, unit μm;
V0: total amount before corrosion inhibiter film, unit m3;
V1: total amount after corrosion inhibiter film, unit m3;
D: be coated with membrane pressure vessel diameter, unit mm;
L: be coated with membrane pressure vessel length, unit m.
Beneficial effect of the present invention is: by one provided by the invention high sulfur Gas Fields surface gathering system pipeline and the online film anticorrosion technology of pressure vessel, the online film anticorrosion to high sulfur Gas Fields surface gathering system pipeline and pressure vessel can be realized, operation process is without the need to stopping production, greatly shorten the activity duration, short construction period, the sealing of operation process whole process, safety coefficient is high; The coating thickness obtained is thick, and strong adhesion, antiseptic effect is good.The present invention utilizes the modes such as corrosion inhibiter infusion, can form the film that a layer thickness is greater than 80 μm at short notice, effectively slow down the corrosion of pipeline and pressure vessel at pipeline and internal pressure vessel walls.Online film anticorrosion technology provided by the invention can be widely used in pipeline in the design of high Sulfurous Gas Fields Development and the film anticorrosion field of pressure vessel.
Accompanying drawing explanation
Fig. 1 is construction flow chart provided by the present invention;
Fig. 2 is the connection layout of device for coating provided by the present invention and film object.
1 film object 2 device for coating 3 by-pass line 4 film object upper end material inlet valve
5 film object lower end discharge valve 6 by-pass line valve 7 device for coating input duct
8 device for coating liquid flowing valve 9 device for coating circulating line 10 device for coating circulation valves.
Detailed description of the invention
High sulfur Gas Fields gathering line and the online technology for coating of internal pressure vessel walls, comprise the following steps:
(1) equipment, tube pass switch, and by closing film object upper end material inlet valve and film object lower end discharge valve, then opening by-pass line valve, making it be circulated by by-pass line, thus film object is isolated system;
(2) gas displacement, inner for film object acid gas displacement is become inert nitrogen gas, adopt the mode that nitrogen purges, purging pressure is 0.5-1.0MPa, purge time 20-30min, after purging, film object internal gas residual volume is detected, can subsequent operation be carried out after pernicious gas content is lower than threshold value;
(3) flow process connects, after device for coating input duct being connected to film object upper end material inlet valve, device for coating circulating line is connected to device for coating circulation valve, complete the connection of film object and device for coating, the device for coating used comprises suction pump, self priming pump, circulating pump, liquid level take into account high pressure by-pass line, and its voltage withstand class is greater than 10MPa;
(4) inject corrosion inhibiter, this corrosion inhibiter is oil-soluble inhibitor, and concentration is 100wt.%, opens device for coating liquid flowing valve, injects in film object by coating device by corrosion inhibiter;
(5) circulation is set up, open device for coating circulation valve, open the corrosion inhibiter circulating pump on device for coating, corrosion inhibiter is flow circuit in film object, make to form corrosion inhibiter flow circuit between film object and device for coating, corrosion inhibiter flow circuit comprises the common circulation of pipeline and pressure vessel, and rate of circulating flow is 1-3m/s, and circulation timei is 5-10min;
(6) corrosion inhibiter soaks, and corrosion inhibiter soaks film in film object inside, and corrosion inhibiter soak time is 5-10min;
(7) medicament is extracted out, closedown device for coating liquid flowing valve after film completes, open the self priming pump on device for coating, extract the unnecessary corrosion inhibiter in film object out emptying, the corrosion inhibiter raffinate of film object inside blows out by mode further that adopt nitrogen to purge after extracting the inner unnecessary corrosion inhibiter of film object out;
(8) inspection of quality, carries out inspection of quality and evaluation to film effect;
(9) recover flow process, remove and connect flow process, remove device for coating feed liquor pipeline, remove device for coating pipeloop; Open film object lower end discharge valve, open film object upper end material inlet valve; Close by-pass line valve, recover the normal operational process of film object.
What described step (8) carried out that the examination and evaluating of quality adopts to film effect is evaluation method to thickness, and its pipeline coating thickness computing formula is as follows:
H: coating thickness, unit μm;
V
0: total amount before corrosion inhibiter film, unit m3;
V
1: total amount after corrosion inhibiter film, unit m3;
D: film internal diameter of the pipeline, unit mm;
Pressure vessel and equipment coating thickness computing formula is as follows:
H: coating thickness, unit μm;
V0: total amount before corrosion inhibiter film, unit m3;
V1: total amount after corrosion inhibiter film, unit m3;
D: be coated with membrane pressure vessel diameter, unit mm;
L: be coated with membrane pressure vessel length, unit m.
80 μm should be greater than by calculating coating thickness and pressure vessel and equipment coating thickness to meet the requirements, reach the object of anticorrosive coating film.
Adhesive force evaluation method is that standardized angle is the otch of 60 ° on film layer, and should draw antireflective coating layer to matrix, cement designated port position, then tear up adhesive tape rapidly with adhesive tape, coating without peeling off, should illustrate that film effect is good.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.
Claims (8)
1. high sulfur Gas Fields gathering line and the online technology for coating of internal pressure vessel walls, is characterized in that, comprise the following steps:
(1) equipment, tube pass switch, and by closing film object upper end material inlet valve and film object lower end discharge valve, then opening by-pass line valve, making it be circulated by by-pass line, thus film object is isolated system;
(2) gas displacement, becomes inert gas by inner for film object acid gas displacement;
(3) flow process connects, and after device for coating input duct being connected to film object upper end material inlet valve, device for coating circulating line being connected to device for coating circulation valve, completing the connection of film object and device for coating;
(4) inject corrosion inhibiter, open device for coating liquid flowing valve, by coating device, corrosion inhibiter is injected in film object;
(5) set up circulation, open device for coating circulation valve, open the corrosion inhibiter circulating pump on device for coating, corrosion inhibiter is flow circuit in film object, makes to form corrosion inhibiter flow circuit between film object and device for coating;
(6) corrosion inhibiter soaks, and corrosion inhibiter soaks film in film object inside;
(7) extract medicament out, closedown device for coating liquid flowing valve after film completes, open the self priming pump on device for coating, extract the unnecessary corrosion inhibiter in film object out emptying;
(8) inspection of quality, carries out inspection of quality and evaluation to film effect;
(9) recover flow process, remove and connect flow process, remove device for coating feed liquor pipeline, remove device for coating pipeloop; Open film object lower end discharge valve, open film object upper end material inlet valve; Close by-pass line valve, recover the normal operational process of film object.
2. high sulfur Gas Fields gathering line according to claim 1 and the online technology for coating of internal pressure vessel walls, it is characterized in that, the mode that gas displacement described in described step (2) adopts nitrogen to purge, purging pressure is 0.5-1.0MPa, purge time 20-30min.
3. high sulfur Gas Fields gathering line according to claim 1 and the online technology for coating of internal pressure vessel walls, it is characterized in that, the device for coating used in described step (3) comprises suction pump, self priming pump, circulating pump, liquid level take into account high pressure by-pass line, and its voltage withstand class is greater than 10MPa.
4. high sulfur Gas Fields gathering line according to claim 1 and the online technology for coating of internal pressure vessel walls, is characterized in that, the plastics described in described step (4) is corrosion inhibiter, and this corrosion inhibiter is oil-soluble inhibitor, and concentration is 100wt.%.
5. high sulfur Gas Fields gathering line according to claim 1 and the online technology for coating of internal pressure vessel walls, it is characterized in that, described in described step (5), corrosion inhibiter flow circuit comprises the common circulation of pipeline and pressure vessel, and rate of circulating flow is 1-3m/s, and circulation timei is 5-10min.
6. high sulfur Gas Fields gathering line according to claim 1 and the online technology for coating of internal pressure vessel walls, is characterized in that, the corrosion inhibiter soak time described in described step (6) is 5-10min.
7. high sulfur Gas Fields gathering line according to claim 1 and the online technology for coating of internal pressure vessel walls, it is characterized in that, the corrosion inhibiter raffinate of film object inside blows out by mode further that adopt nitrogen to purge after extracting the inner unnecessary corrosion inhibiter of film object in described step (7) out.
8. high sulfur Gas Fields gathering line and the online technology for coating of internal pressure vessel walls according to claim 1, it is characterized in that, what described step (8) carried out that the examination and evaluating of quality adopts to film effect is evaluation method to coating thickness, and its pipeline coating thickness computing formula is as follows:
H: coating thickness, unit μm;
V
0: total amount before corrosion inhibiter film, unit m3;
V
1: total amount after corrosion inhibiter film, unit m3;
D: film internal diameter of the pipeline, unit mm;
Pressure vessel and equipment coating thickness computing formula is as follows:
H: coating thickness, unit μm;
V0: total amount before corrosion inhibiter film, unit m3;
V1: total amount after corrosion inhibiter film, unit m3;
D: be coated with membrane pressure vessel diameter, unit mm;
L: be coated with membrane pressure vessel length, unit m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510110711.9A CN104785416B (en) | 2015-03-14 | 2015-03-14 | The online coating method of high sulfur Gas Fields gathering line and internal pressure vessel walls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510110711.9A CN104785416B (en) | 2015-03-14 | 2015-03-14 | The online coating method of high sulfur Gas Fields gathering line and internal pressure vessel walls |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104785416A true CN104785416A (en) | 2015-07-22 |
| CN104785416B CN104785416B (en) | 2017-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510110711.9A Active CN104785416B (en) | 2015-03-14 | 2015-03-14 | The online coating method of high sulfur Gas Fields gathering line and internal pressure vessel walls |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194126A (en) * | 2016-09-19 | 2016-12-07 | 中国石油化工股份有限公司 | The integral method gone into operation for high sour gas well debugging |
| CN112620016A (en) * | 2019-09-24 | 2021-04-09 | 中国石油化工股份有限公司 | Film coating device and method for sour gas pipeline of sulfur-containing gas field |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5476642A (en) * | 1977-11-30 | 1979-06-19 | Osaka Gas Co Ltd | Lining of inner surface of pipe |
| CN1654135A (en) * | 2005-02-28 | 2005-08-17 | 王筱均 | Method of rust cleaning, scale removing, film coating and corrosion preventing for large and middle sized pipeline inside wall |
| WO2008088317A1 (en) * | 2007-01-04 | 2008-07-24 | Pipe Restoration Technologies, Inc. | Methods and systems for coating and sealing inside piping systems |
| CN102873003A (en) * | 2012-09-05 | 2013-01-16 | 中国石油天然气集团公司 | Corrosion control method and device for online film formation of pipeline of oil refining and chemical device |
| CN103691651A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Bilateral pressure-control inner-extrusion-coating anti-corrosion process for oil-gas pipeline and anti-corrosion device thereof |
-
2015
- 2015-03-14 CN CN201510110711.9A patent/CN104785416B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5476642A (en) * | 1977-11-30 | 1979-06-19 | Osaka Gas Co Ltd | Lining of inner surface of pipe |
| CN1654135A (en) * | 2005-02-28 | 2005-08-17 | 王筱均 | Method of rust cleaning, scale removing, film coating and corrosion preventing for large and middle sized pipeline inside wall |
| WO2008088317A1 (en) * | 2007-01-04 | 2008-07-24 | Pipe Restoration Technologies, Inc. | Methods and systems for coating and sealing inside piping systems |
| CN102873003A (en) * | 2012-09-05 | 2013-01-16 | 中国石油天然气集团公司 | Corrosion control method and device for online film formation of pipeline of oil refining and chemical device |
| CN103691651A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Bilateral pressure-control inner-extrusion-coating anti-corrosion process for oil-gas pipeline and anti-corrosion device thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194126A (en) * | 2016-09-19 | 2016-12-07 | 中国石油化工股份有限公司 | The integral method gone into operation for high sour gas well debugging |
| CN112620016A (en) * | 2019-09-24 | 2021-04-09 | 中国石油化工股份有限公司 | Film coating device and method for sour gas pipeline of sulfur-containing gas field |
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| Publication number | Publication date |
|---|---|
| CN104785416B (en) | 2017-07-21 |
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