CN101798688A - Octadecylamine corrosion inhibition formula for furnace shutdown protection of thermal power plant - Google Patents
Octadecylamine corrosion inhibition formula for furnace shutdown protection of thermal power plant Download PDFInfo
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- CN101798688A CN101798688A CN201010141259A CN201010141259A CN101798688A CN 101798688 A CN101798688 A CN 101798688A CN 201010141259 A CN201010141259 A CN 201010141259A CN 201010141259 A CN201010141259 A CN 201010141259A CN 101798688 A CN101798688 A CN 101798688A
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- octadecylamine
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Abstract
The invention discloses an octadecylamine corrosion inhibition formula for furnace shutdown protection of a thermal power plant. The formula mainly comprises octadecane amine, acetone oxime and ascorbic acid; the concentration ranges thereof are respectively controlled to be 20-250mu g/L, 60-150mu g/L and 15-100mu g/L; and the glacial acetic acid is taken as cosolvent of octadecylamine and the ammonia is taken as the pH value regulator. The preparation method of the formula comprises the following steps of: firstly adding the octadecane amine; diluting with the ionized water; adding the acetone oxime and the ascorbic acid; completely dissolving the corrosion inhibitor by means of heating, stirring and adding the glacial acetic acid; adding corrosion inhibitor solution into water vapour systems when the furnace is shutdown and lifted down in a sliding way, so that the solution is evenly distributed and fully filled into all the water vapour systems of the furnace; and generating an octadecylamine protection film with a monomolecular layer through the afterheat of the furnace before a heat furnace of the furnace discharges water, wherein the generated protection film can play a part in good protection at the water side of the heating surface of the furnace for 5 months. The method not only is suitable for a high-parameter DC furnace, but also is suitable for a high-parameter steam pocket furnace, can effectively protect the shutdown furnace, can be convenient for workers to overhaul the furnace, solves the disadvantage that the conventional method is short in protection time and is not suitable for overhaul, and can not pollute the furnace after being turned on again. The invention has obvious economic benefit, environmental benefit and social benefit, can not generate harmful substance, and has no secondary pollution.
Description
Technical field
The present invention relates to the stearylamine corrosion inhibition formula that a kind of thermal power plant protection of boiler during shutdown period is used, particularly relate to the Octadecane amine inhibiter compound scheme that a kind of high-parameters power plant boiler Shut-down Protection is used.
Background technology
At present, the oxygen corrosion of boiler between lay-off period is the blowing out corrosion, it not only directly causes the damage of heat power equipment, the work-ing life of reduction equipment, and the product of inactive oxygen corrosion enters boiler with feedwater, to deposit at heating surface, cause other position corrosion damage of boiler, cause more serious consequence.The inactive corrosive decision condition of boiler is exactly oxygen and steam, and their existence will cause producing corrosion at tube wall surface.Because this corrosion is under the condition of normal temperature or non high temperature, this blowing out corrosive hazardness is more serious than run duration on the contrary, and influences the operation of unit.Facts have proved: produce the boiler than heavy corrosion, majority causes run duration development owing between lay-off period corrosion taking place.Because after boiler is stopped using, outside air will enter in the water-steam system of boiler in a large number, though this moment, boiler discharged water, but on the Boiler Metallic internal surface, always adhere to water membrane, airborne oxygen just is dissolved in this moisture film, so that the state that reaches capacity, this just causes dissolve oxygen corrosion especially easily.And if at the surperficial salt crust that is dissolved in moisture film in addition of Boiler Metallic, corrosion will be stronger.At this on the one hand, the more moistening weather in south can make the easier generation of blowing out corrosion.
Blowing out corrosive hazardness is also more serious than when operation, because the oxygen corrosion during boiler operatiopn generally occurs in the inlet end of water feeding system and economizer, and the blowing out corrosion not only comprises boiler body, also comprises superheater and other all water-steam systems; In addition, the blowing out corrosion takes place at low temperatures, corrosion product is the high price ferric oxide, and its texture ratio is more loose, and poor to the tack of metallic surface, can play the cathodic depolarization agent at run duration, the corrosion reaction product is a ferrous compound, has not only corroded metal, and bivalent compound is between next boiler lay-off period, be oxidized to the high price compound again, corrosion process is carried out repeatedly.The blowing out corrosion mainly contains two harm greatly: make the off-stream anit metallic surface suffer extensive damage in a short time, the corrosion the during operation of aggravation heat power equipment.
Traditionally, though the boiler Shut-down Protection has dry method protection and wet method protection two big classes kind of method surplus in the of totally 10, for any guard method, its applicable elements is arranged all, can not guarantee maintenance as the wet method protection, dry method protection guard time is shorter relatively.At present; thermal power plant mainly all is a high-parameters thermal power plant; traditional boiler protection method can not satisfy actual needs; particularly at present the high parameter boiler start and stop are required frequent; protection effect between the boiler lay-off period, the efficient that boiler restarts, these all directly have influence on the benefit and the safety of thermal power plant.
Summary of the invention
Technical problem to be solved by this invention provides a kind of material integrity between the power plant boiler lay-off period, but also stearylamine corrosion inhibition formula that boiler can conveniently be overhauled at guard period not only can effectively protected.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: the stearylamine corrosion inhibition formula that a kind of thermal power plant protection of boiler during shutdown period is used, it is main composite composition that this prescription adopts Octadecane amine, acetoxime, xitix, the concentration range of control is respectively at 20～250 μ g/L, 60～150 μ g/L, 15～100 μ g/L, with Glacial acetic acid as the solubility promoter of stearylamine, ammonia as pH value conditioning agent; Add Octadecane amine during preparation earlier, dilute with deionized water, add acetoxime and xitix again, limit heating in the layoutprocedure, limit stirring, limit add the dissolving fully that Glacial acetic acid is realized inhibiter; Corrosion inhibitor solution adds water-steam system in boiler shutdown downhill race process; make the solution uniformly distributing be filled to all water-steam systems of boiler; and before discharging water, the boiler hot stove utilize boiler afterheat to generate the stearylamine protective membrane of unimolecular layer; the protective membrane that is generated can play good protective action in boiler surface water side, and can keep the longest 5 months.
The stearylamine corrosion inhibition formula that adopts thermal power plant's protection of boiler during shutdown period of technique scheme to use has not only solved the conventional dry protection short problem of holding time, and has also solved the not easy-to-maintain deficiency of wet method protection; The present invention also is applicable to the high-parameters dum boiler except being applicable to the high-parameters one through boiler, and boiler can not bring pollution to boiler behind the ignition trigger again.
In sum; the guard method that the invention provides a kind of permanently effective protection high parameter boiler, can make things convenient for boiler between lay-off period, to overhaul again, the present invention has remarkable economic efficiency, environmental benefit and social benefit, simultaneously; the inventive method can not produce objectionable impurities, non-secondary pollution.
The present invention compared with prior art has following advantage:
1) after the stearylamine corrosion inhibitor solution was implemented Shut-down Protection, the protective membrane in boiler surface internal surface formation unimolecular layer can reach the longest 5 months protection effect;
2) because the good filming effect of stearylamine can make boiler needn't adopt the wet method protection can effectively prevent corrosion between lay-off period, when boiler is stopped using, it is overhauled, save time, raise the efficiency thereby help the staff;
3) the inventive method can not produce objectionable impurities, non-secondary pollution.
Embodiment 1
High temperature static experiment under 300 ℃ of conditions.The boiler water-wall tube test piece is after 300 ℃ of autoclaves are tested 8 hours, test-results is dripped in acid copper sulfate acid: color does not take place by indigo plant to red variation (generally speaking in two hours nothings of the test piece of vapour side test, acid copper sulfate drips in the test piece, do not take place by indigo plant for 7 seconds to red colour-change, expression test piece film forming is very anti-corrosion), the test piece of liquid side test reddened in 20 minutes; The result of water drop test is: after dripping in the test piece of vapour side test, and the water droplet glomeration, effect is fine; The test piece balling-up of liquid side test is fine, easily rolls.The result that test is dripped in acid shows that the film-formation result of test piece is good, and is very anti-corrosion; The result of water drop test shows that the test piece film forming has the composition of stearylamine, because stearylamine has surfactivity, water droplet is not soaked into, and water droplet drops in the test piece and can tumble by glomeration.
Embodiment 2
High temperature dynamic experiment under 320 ℃ of conditions.In temperature is that 320 ℃, pressure are under the condition of 11MPa, and the flow velocity of control gas-vapor mix in the dynamic simulation pipeline section is 13L/h, and constant temperature time is six hours.Take out sheet at last and be uniform grey black, some blue wet look at the middle part, the water droplet experiment effect is fine, and acid is dripped experiment better, but omits the static state experiment inferior to 300 ℃; In damp and hot case lacing film, 75 talentes begin to occur the erosion point.These results show: under such condition, test piece becomes the respond well of stearylamine adsorption film; Simultaneously, this scheme also has a projecting point to be: the effect of damp and hot case lacing film is better than static state greatly, and 75 talentes begin corrosion.
Claims (3)
1. stearylamine corrosion inhibition formula that thermal power plant's protection of boiler during shutdown period is used; it is characterized in that: adopting Octadecane amine, acetoxime, xitix is main composite composition; the concentration range of control is respectively at 20～250 μ g/L, 60～150 μ g/L, 15～100 μ g/L, with Glacial acetic acid as the solubility promoter of stearylamine, ammonia as pH value conditioning agent.
2. the compound scheme of Octadecane amine inhibiter according to claim 1, it is characterized in that: add Octadecane amine during preparation earlier, dilute with deionized water, add acetoxime and xitix again, the dissolving fully that stir on limit heating, limit in the layoutprocedure, the limit adds Glacial acetic acid realization inhibiter.
3. the compound scheme of Octadecane amine inhibiter according to claim 1; it is characterized in that: corrosion inhibitor solution adds water-steam system in boiler shutdown downhill race process; make the solution uniformly distributing be filled to all water-steam systems of boiler; and utilized boiler afterheat to generate the stearylamine protective membrane of unimolecular layer before the boiler hot stove discharges water, the protective membrane that is generated can play good protective action in boiler surface water side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010141259A CN101798688A (en) | 2010-04-08 | 2010-04-08 | Octadecylamine corrosion inhibition formula for furnace shutdown protection of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010141259A CN101798688A (en) | 2010-04-08 | 2010-04-08 | Octadecylamine corrosion inhibition formula for furnace shutdown protection of thermal power plant |
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| CN101798688A true CN101798688A (en) | 2010-08-11 |
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| CN201010141259A Pending CN101798688A (en) | 2010-04-08 | 2010-04-08 | Octadecylamine corrosion inhibition formula for furnace shutdown protection of thermal power plant |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062728A (en) * | 2010-12-13 | 2011-05-18 | 武汉大学 | Method for measuring concentration of octadecylamine |
| CN102505119A (en) * | 2011-11-29 | 2012-06-20 | 吉林省电力科学研究院有限公司 | Novel dissolving agent for octadecylamine |
| CN103710711A (en) * | 2014-01-07 | 2014-04-09 | 北京化工大学 | Octadecylamine emulsion and preparation technology thereof |
| RU2563271C1 (en) * | 2014-04-22 | 2015-09-20 | Общество с ограниченной ответственностью "Эко Энерг" (ООО "Эко Энерг") | Method of protecting internal surfaces of heating systems from corrosion and sediments accumulation |
| GB2528112A (en) * | 2014-07-10 | 2016-01-13 | Global Chemical Technologies Ltd | Improvements relating to inhibition of corrosion |
| CN108048852A (en) * | 2017-11-30 | 2018-05-18 | 湖南省湘电试验研究院有限公司 | A kind of flexible protection of boiler during shutdown period medicament and preparation method thereof |
-
2010
- 2010-04-08 CN CN201010141259A patent/CN101798688A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062728A (en) * | 2010-12-13 | 2011-05-18 | 武汉大学 | Method for measuring concentration of octadecylamine |
| CN102062728B (en) * | 2010-12-13 | 2012-07-25 | 武汉大学 | Method for measuring concentration of octadecylamine |
| CN102505119A (en) * | 2011-11-29 | 2012-06-20 | 吉林省电力科学研究院有限公司 | Novel dissolving agent for octadecylamine |
| CN102505119B (en) * | 2011-11-29 | 2013-03-06 | 吉林省电力有限公司电力科学研究院 | Novel dissolving agent for octadecylamine |
| CN103710711A (en) * | 2014-01-07 | 2014-04-09 | 北京化工大学 | Octadecylamine emulsion and preparation technology thereof |
| RU2563271C1 (en) * | 2014-04-22 | 2015-09-20 | Общество с ограниченной ответственностью "Эко Энерг" (ООО "Эко Энерг") | Method of protecting internal surfaces of heating systems from corrosion and sediments accumulation |
| GB2528112A (en) * | 2014-07-10 | 2016-01-13 | Global Chemical Technologies Ltd | Improvements relating to inhibition of corrosion |
| GB2528112B (en) * | 2014-07-10 | 2021-11-24 | Wcs Services Ltd | Improvements relating to inhibition of corrosion |
| CN108048852A (en) * | 2017-11-30 | 2018-05-18 | 湖南省湘电试验研究院有限公司 | A kind of flexible protection of boiler during shutdown period medicament and preparation method thereof |
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Open date: 20100811 |