CN102286748B - Gas field gas dehydrated ethanediol regenerator corrosion inhibitor - Google Patents
Gas field gas dehydrated ethanediol regenerator corrosion inhibitor Download PDFInfo
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- CN102286748B CN102286748B CN 201010214893 CN201010214893A CN102286748B CN 102286748 B CN102286748 B CN 102286748B CN 201010214893 CN201010214893 CN 201010214893 CN 201010214893 A CN201010214893 A CN 201010214893A CN 102286748 B CN102286748 B CN 102286748B
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- terepthaloyl moietie
- regenerating unit
- inhibiter
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- gas dehydration
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Abstract
The invention relates to a gas field gas dehydrated ethanediol regenerator corrosion inhibitor, which is applied to the technical field of oil gas field gas extraction equipment corrosion inhibition and belongs to a special composite corrosion inhibitor for inhibiting the corrosion of a gas field gas dehydrated ethanediol regenerator. The gas field gas dehydrated ethanediol regenerator corrosion inhibitor comprises the following ingredients in weight parts: 0.35 to 0.55 part of imidazolone, 0.09 to 0.15 part of dormison, 0.1 to 0.5 part of 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDPA), 16 to 18 parts of triethanolamine, 0.35 to 0.55 part of Mannich base, 0.09 to 0.15 part of dehydroascorbic acid and 0.02 to 0.1 part of ditertbutylhydroquinone. The gas field gas dehydrated ethanediol regenerator corrosion inhibitor has the effect that the serious corrosion problems of serious corrosion in parts of process pipelines, valves, regeneration towers and the like of the existing gas field gas dehydrated ethanediol regenerating system , even perforation and the like are solved.
Description
Technical field
The present invention relates to fld production gas technology field, particularly gas recovery facility neutralization technology field.Be a kind ofly can successfully slow down present reservoir gas dehydration terepthaloyl moietie regenerating unit corrosive specific complex inhibiter.
Background technology
At present, widely-used terepthaloyl moietie in the reservoir gas dewatering system.Because terepthaloyl moietie rich solution (aqueous solution) can at high temperature regenerate and in use receive thermooxidizing to generate organic acid; Make the pH value descend; The terepthaloyl moietie rich solution becomes acidic solution; The accumulation of bicarbonate ion and cl ions in dissolved oxygen in the terepthaloyl moietie rich solution, carbon dioxide in natural and a small amount of hydrogen sulfide, the associated water simultaneously; Further strengthened the acidity of ethylene glycol solution, this has a strong impact on the safe operation of equipment with regard to problems such as position seriously corrodeds such as the process pipeline that causes the terepthaloyl moietie reclaim equiment, valve, regenerator column even perforation.
For addressing the above problem, slow down terepthaloyl moietie regeneration system rapidly corrosion technology and in fld production, paid attention to widely and develop, yet at present both at home and abroad the oil field do not have a kind of otherwise effective technique to solve terepthaloyl moietie regeneration system rapidly heavy corrosion property problem basically.In light of this situation, the present invention provides a kind of cost low, and construction technology is simple, can successfully slow down the technology of reservoir gas dehydration terepthaloyl moietie regeneration system rapidly heavy corrosion problem, promptly adopts composite corrosion inhibitor to slow down the corrosion of terepthaloyl moietie regeneration system rapidly.
Summary of the invention
The objective of the invention is: a kind of reservoir gas dehydration terepthaloyl moietie regenerating unit inhibiter is provided, and the position heavy corrosion such as process pipeline, valve, regenerator column even the perforation problem that solve or slow down reservoir gas dehydration terepthaloyl moietie regeneration system rapidly take place.
The technical scheme that the present invention adopts is: reservoir gas dehydration terepthaloyl moietie regenerating unit inhibiter; Mainly be made up of high-temperature corrosion inhibitor tetrahydroglyoxaline, hydroxy ethylene diphosphonic acid, PH regulator trolamine, Mannich base, inhibitor L-dehydroascorbic acid and tertiarybutylhydroquinone, its each ingredients weight parts is:
1, tetrahydroglyoxaline is 0.35～0.55 part;
2, methylparafynol is 0.09～0.15 part;
3, hydroxy ethylene diphosphonic acid (HEDP) is 0.1～0.5 part;
4, trolamine is 16～18 parts;
5, Mannich base is 0.35～0.55 part;
6, L-dehydroascorbic acid is 0.09～0.15 part;
7, tertiarybutylhydroquinone (TBHQ) is 0.02～0.1 part.
Described inhibiter tetrahydroglyoxaline is dodecyl hydroxyethyl imidazole quinoline, naphthenic base KLSS-A tetrahydroglyoxaline or ethyloic amphoteric imidazoline.
Hydroxy ethylene diphosphonic acid (HEDP) adopts is that to close the code name that safe water treatment ltd produces be HT-101 in the Zaozhuang City.
The preparation of reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor: at normal temperatures, mix, be prepared into reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor in each composition weight ratio.
The use of reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor:, add reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor in the terepthaloyl moietie rich solution ingress of glycol dehydration reclaim equiment; Detect the pH value of liquid in the glycol flow container; According to the pH value situation of liquid in the glycol flow container, regularly add reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor or adopt little displacement pump evenly to add reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor; The adding quantity of composite corrosion inhibitor should make the pH value of liquid in the glycol flow container remain between 7～8.
Beneficial effect of the present invention: reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor of the present invention; Efficiently solve position heavy corrosion, the perforation problems such as process pipeline, valve, regenerator column of present reservoir gas dehydration terepthaloyl moietie regeneration system rapidly; Corrosion inhibition rate can reach more than 89% under the condition that adds continuously, and anticorrosion ability is very good.And can promote terepthaloyl moietie and water sepn, accelerate glycol dehydration speed.Reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor chemical degradation rate is low, chemicalstability and Heat stability is good, does not influence glycol circulation and uses.Have feasibility, it is convenient to implement, and improves the qi exhaustion water glycol regenerating unit life-span, makes equipment safety operation.
Embodiment
Embodiment 1: reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor preparation: at normal temperatures, each component is added in the reaction kettle by weight, stirred 45 minutes, stir; Each ingredients weight parts is: 0.5 part of dodecyl hydroxyethyl imidazole quinoline, 0.1 part of methylparafynol; 0.2 part of hydroxy ethylene diphosphonic acid, 16 parts of trolamines, 0.5 part of Mannich base, 0.1 part of L-dehydroascorbic acid; 0.03 part of tertiarybutylhydroquinone.Test at the indoor lacing film that carries out, experimental result is following:
Laboratory experiment effect table
| Add dose mg/L | Corrosion rate mm/a | Corrosion inhibition rate % | The lacing film surface appearance |
| / | 0.4559 | / | Surface dulling |
| 2000 | 0.0689 | 89.9 | Surface-brightening, local crow |
| 3000 | 0.0663 | 91.5 | Surface-brightening, local crow |
| 4000 | 0.0451 | 94.1 | Surface-brightening, local crow |
Embodiment 2: the preparation of reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor is identical with embodiment 1.Each ingredients weight parts is: 0.45 part of naphthenic base KLSS-A tetrahydroglyoxaline; 0.13 part of methylparafynol; 0.3 part of hydroxy ethylene diphosphonic acid (it is HT-101 that the code name that safe water treatment ltd produces closes in the Zaozhuang City), 18 parts of trolamines, 0.35 part of Mannich base, 0.12 part of L-dehydroascorbic acid; 0.06 part of tertiarybutylhydroquinone.Use: the aqueous glycol solution ingress at the glycol dehydration reclaim equiment adds; The pH value that detects liquid in the glycol flow container is 7.5; Adopt little displacement pump evenly to add reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor.Glycol dehydration speed improves 20%.On-the-spot result of use is following:
On-the-spot result of use table
Embodiment 3: the preparation of reservoir gas dehydration terepthaloyl moietie regenerating unit composite corrosion inhibitor is identical with embodiment 2 with method of use.Each ingredients weight parts is: 0.55 part of ethyloic amphoteric imidazoline; 0.14 part of methylparafynol; 0.45 part of hydroxy ethylene diphosphonic acid, 17 parts of trolamines, 0.45 part of Mannich base, 0.14 part of L-dehydroascorbic acid; 0.09 part of tertiarybutylhydroquinone.Glycol dehydration speed improves 22%.
On-the-spot result of use table
Test in place through 9 months proves: terepthaloyl moietie reclaim equiment operation conditions is stable, and the terepthaloyl moietie performance is not had influence, and operation has no side effect to equipment such as reboiler, regenerator columns, can be with the corrosion control of terepthaloyl moietie reclaim equiment below 0.20mm/a; After overhaul of the equipments terepthaloyl moietie was changed, the corrosion control of regeneration system rapidly had obtained good preservative effect below 0.02mm/a.
Claims (4)
1. reservoir gas dehydration terepthaloyl moietie regenerating unit inhibiter; Mainly be made up of high-temperature corrosion inhibitor tetrahydroglyoxaline, hydroxy ethylene diphosphonic acid, pH regulator agent trolamine, Mannich base, inhibitor L-dehydroascorbic acid and tertiarybutylhydroquinone, its each ingredients weight parts is:
0.35～0.55 part of tetrahydroglyoxaline;
0.09～0.15 part of methylparafynol;
0.1～0.5 part of hydroxy ethylene diphosphonic acid (HEDP);
16～18 parts of trolamines;
0.35～0.55 part of Mannich base;
0.09～0.15 part of L-dehydroascorbic acid;
0.02～0.1 part of tertiarybutylhydroquinone (TBHQ).
2. reservoir gas dehydration terepthaloyl moietie regenerating unit inhibiter as claimed in claim 1, it is characterized in that: described inhibiter tetrahydroglyoxaline is dodecyl hydroxyethyl imidazole quinoline, naphthenic base KLSS-A tetrahydroglyoxaline or ethyloic amphoteric imidazoline.
3. reservoir gas dehydration terepthaloyl moietie regenerating unit inhibiter as claimed in claim 1, it is characterized in that: described hydroxy ethylene diphosphonic acid code name is HT-101.
4. like claim 1,2 or 3 described reservoir gas dehydration terepthaloyl moietie regenerating unit inhibiter, it is characterized in that: method of use is: in the terepthaloyl moietie rich solution ingress of terepthaloyl moietie regenerating unit, add reservoir gas dehydration terepthaloyl moietie regenerating unit inhibiter; Detect the pH value of liquid in the glycol flow container; According to the pH value situation of liquid in the glycol flow container, regularly add reservoir gas dehydration terepthaloyl moietie regenerating unit inhibiter or adopt little displacement pump evenly to add reservoir gas dehydration terepthaloyl moietie regenerating unit inhibiter; Adding quantity should make the pH value of liquid in the glycol flow container remain between 7～8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010214893 CN102286748B (en) | 2010-06-21 | 2010-06-21 | Gas field gas dehydrated ethanediol regenerator corrosion inhibitor |
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| CN 201010214893 CN102286748B (en) | 2010-06-21 | 2010-06-21 | Gas field gas dehydrated ethanediol regenerator corrosion inhibitor |
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| CN102286748B true CN102286748B (en) | 2012-12-12 |
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| CN107475722A (en) * | 2017-09-08 | 2017-12-15 | 岳阳凯门水性助剂有限公司 | Composite inhibiter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050537A (en) * | 2006-04-04 | 2007-10-10 | 中国石油天然气股份有限公司 | Corrosion inhibitor for restraining metal corrosion, and preparation method |
| CN101699268A (en) * | 2009-11-04 | 2010-04-28 | 中国石油天然气股份有限公司 | Rapid judgment for corrosion of sodium bicarbonate water type oil well and corrosion inhibitor |
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| US6953537B2 (en) * | 2002-05-24 | 2005-10-11 | Scott David Trahan | Corrosion inhibitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050537A (en) * | 2006-04-04 | 2007-10-10 | 中国石油天然气股份有限公司 | Corrosion inhibitor for restraining metal corrosion, and preparation method |
| CN101699268A (en) * | 2009-11-04 | 2010-04-28 | 中国石油天然气股份有限公司 | Rapid judgment for corrosion of sodium bicarbonate water type oil well and corrosion inhibitor |
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