CN101498001A - Anti-corrosive protective film agent for marine boiler - Google Patents
Anti-corrosive protective film agent for marine boiler Download PDFInfo
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- CN101498001A CN101498001A CNA2008100331920A CN200810033192A CN101498001A CN 101498001 A CN101498001 A CN 101498001A CN A2008100331920 A CNA2008100331920 A CN A2008100331920A CN 200810033192 A CN200810033192 A CN 200810033192A CN 101498001 A CN101498001 A CN 101498001A
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Abstract
The invention discloses an antiseptic protective film used in a ship boiler, which comprises octadecylamine, emulsifier, stabilizer, deoxidant and water. The antiseptic protective film used in the ship boiler has good antiseptic effect, high stability, long preservation time, safety and environmental protection and can be used in both an operation condition and an idle condition when used in the ship boiler.
Description
Technical field
The present invention relates to a kind of anti-corrosive protective film agent for marine boiler.
Background technology
In theory, steam is purified, can not produce corrosion.But in actual applications, more or less all contain impurity in the steam, therefore can produce certain corrosion the steam pipe system inwall.Corrosion not only can be shortened the work-ing life of equipment, causes financial loss, and corrosion product can change over to again in the condensed water simultaneously, polluted water, thus having aggravated the fouling on the heating surface, fouling has promoted underdeposit corrosion again, causes the vicious cycle of corrosion and fouling.
At the corrosion of steam pipe system, suitable anti-corrosion measure or anticorrosive measure are not improper as if not taking, and all can cause the corrosion of equipment to damage.For the marine vapor pipe network, if steam pipe network corrosion failure, ship may run out of steam, and this only may be fatal to seagoing vessel, and safety and economic operation is caused very big influence.
Want the corrosion of strict control steam pipe system, then must the strict water quality of controlling the ship's boiler feedwater.This is the requisite measure that prevents ship's boiler and attached water, vapor-phase system fouling, corrosion and salification, is to guarantee quality of steam, and the assurance of steam turbine safe operation can also reduce the blowdown loss of ship's boiler pot water, saves running cost.But the water quality of only controlling the ship's boiler feedwater is not enough, also must make an issue of on steam pipe system.Therefore the corrosionproof protection film becomes present ship's boiler rot-resistant focus in efficient, the environmental protection of development, the easy to operate ship's boiler.
In recent years; what domestic research application was more is a kind of stearylamine stoppage in transit guard method; this method is to add stearylamine to therrmodynamic system when unit outage; stearylamine is a kind of long carbochain fatty amine; its end has hydrophilic radical; one end has hydrophobic macromolecular structure; after this type of material adds therrmodynamic system; they can form the stearylamine film in the metallic surface under certain condition; this tunic can be isolated water and metal; behind unit outage, prevent oxygen and carbon dioxide in the atmosphere, water in air and metallic contact, thereby play a protective role.Basically based on the emulsion of stearylamine-water, the phenomenon that layering is lumpd appears to present domestic liquid stearylamine product in this product instability easily, and the shelf time is shorter.And state's class research at present, application stearylamine Shut-down Protection technology also are mainly used in power system part heat power equipment, and fundamental research is done seldom.Though some experiment has obtained good effect, a lot of technologies are not perfect, also do not reach best state, some technical problem be not well solved [Du Chenggang, Wang Wenfeng.Pure stearylamine Shut-down Protection technology is in the application in ten Li Quan power station, Shandong Electric Power Group technology, 2003 the 4th phases (total the 132nd phase)].Also have part of test results to show: positive stearylamine is water-soluble relatively poor, and vapour, the balanced film forming of liquid phase and anti-local corrosion aspect effect are not satisfactory, and [Zhang Zhongyi, Zhang Weidi pray sharp bright.The positive application of stearylamine emulsion on the heat power equipment Shut-down Protection, Inner Mongol power technology, 2005 the 23rd the 3rd phases of volume].At present, all spendable corrosionproof protection film that is applied in the ship's boiler yet there are no report under operational conditions and stoppage in transit condition.
Summary of the invention
Technical problem to be solved by this invention is poor for the emulsion product stability that overcomes above-mentioned existing stearylamine-water, and easily layering is lumpd, and the shelf time is short, the defective that anticorrosion ability is not good, and a kind of novel anti-corrosive protective film agent for marine boiler is provided.
Corrosionproof protection film in the ship's boiler of the present invention, it contains: octadecylamine, emulsifying agent, stablizer, oxygen scavenger and water.
What wherein, the content of described octadecylamine was preferable is mass percent 1～15%; What the content of described emulsifying agent was preferable is mass percent 0.001～0.2%; What the content of described stablizer was preferable is mass percent 1～5%; What the content of described oxygen scavenger was preferable is mass percent 0.001～0.1%; What the content of described water was preferable is mass percent 80～95%.
Wherein, described octadecylamine is also referred to as stearylamine, for the white waxy solid crystallization, is insoluble in water, when temperature can form emulsion with water during greater than 75 ℃, is soluble in chloroform, is dissolved in organic solvents such as ethanol, acetic acid and ether.Surpass 350 ℃ in temperature, under the no air conditions, stearylamine can be decomposed to form harmless hydrocarbon polymer and little ammonia.Stearylamine is an organic membrane amine; be that an end has hydrophilic radical, the other end that the macromolecular structure of hydrophobic grouping is arranged; it is a kind of metal inhibitor of adsorptive type; after adding therrmodynamic system; gasification at high temperature; enter ship's boiler, steam pipe system, steam turbine and whole therrmodynamic system with steam; polar group is by metal adsorption; nonpolar group aligns in solution; circulation medium and metallic surface are separated; form the hydrophobic nature protective membrane of a unimolecular layer or polymolecular layer in the metallic surface, metal and corrosive deposit are kept apart, thereby prevent corrosion.And the film that experimental results show that generation is clear in the steam side performance, and steam pipe system has obtained good protection.
Wherein, described emulsifying agent is preferable is a kind of in alkyl sodium sulfonate, alkylsulphonic acid amine, sodium alkyl benzene sulfonate, Sodium dodecylbenzene sulfonate, Witco 1298 Soft Acid amine, sodium dibutyl naphthalene sulfonate, aerosol OT, polyoxyethylene octylphenol ether and the Viscotrol C sodium sulfonate, preferred polyoxyethylene octylphenol ether (trade(brand)name OP-10, molecular weight 646).The present invention uses emulsifying agent that stearylamine is uniformly dispersed in deionized water, has overcome the problem that stearylamine is insoluble in water, has avoided the resistance knot problem in the stearylamine film process.
Wherein, described stablizer is preferable is selected from secondary octanol and/or thanomin.The stablizer that the present invention uses can make quick in stove, even, the effective film forming of stearylamine, and can improve the stability of stearylamine, prolongs the shelf time of stearylamine.
Wherein, described oxygen scavenger is preferable is in methyl ethyl ketone oxime, DMKO, saccharosonic acid, carbohydrazide and the diethyl hydroxylamine one or more.The oxygen scavenger that the present invention uses had both had good deoxygenation ability, and the ability of passive metal is arranged again, and not only nontoxic or low toxicity but also easy to use.
Wherein, described water is deionized water.
With the simple uniform mixing of mentioned component, heat to 55 ℃～90 ℃, stir and can make corrosionproof protection film in the ship's boiler of the present invention in 5～120 minutes.Easy to use, need not to increase other auxiliary emulsification facility during use, as long as pour the original medicine system of heat power equipment into by metering.Agents useful for same of the present invention and raw material are all commercially available to be got.
The corrosionproof protection film had both kept the characteristic of stearylamine in the ship's boiler of the present invention, had solved the problem that stearylamine is insoluble in water again.After using the interior corrosionproof protection film of ship's boiler of the present invention, can produce hydrophobicity monomolecular adsorption film in stove, water, vapour contact with steel matrix in the isolated stove, slow down the interior environmental corrosion of ship's boiler body and feedwater, condensate system and other water system.The present invention not only can protect ship's boiler, also can protect steam turbine.
The corrosionproof protection film has the following advantages in the ship's boiler of the present invention:
(1) adopts emulsifying agent to form water miscible liquid, stearylamine is uniformly dispersed, avoid the resistance knot in the stearylamine film process.
(2) stability is high, and the shelf time is long.
(3) can form complete surface adsorption hydrophobic film, the metallic surface water contact angle is greater than 120 degree.
(4) liquid phase, gas phase film forming in the lump in the stove needn't emptying stove water after the film forming, and ship's boiler starts fast.
(5) after the normal operation of ship's boiler, the medicament residual component decomposes through deoxygenator discharges noresidue.
(6) do not find that as yet stearylamine is used for the toxic side effect that the ship's boiler corrosionproof protection produces, implementing whole process does not have pollutent to efflux, safety and environmental protection.
When (7) being used for ship's boiler, under operational conditions and inactive condition, all can use.
Embodiment
Mode below by embodiment further specifies the present invention, but does not therefore limit the present invention among the described scope of embodiments.Each component among the following embodiment all is conventional commercially available prod.
Embodiment 1～10
Following table has provided corrosionproof protection film embodiment 1～10 in the ship's boiler of the present invention; earlier stearylamine is pulverized; place container; add entry; the limit edged stirs; and add emulsifying agent, stablizer and oxygen scavenger, heat and remain on certain temperature (temperature, time is: 55 ℃～90 ℃ of temperature, time 5min～120min) stir and make it form uniform water miscible liquid, can make corrosionproof protection film in each ship's boiler.
Corrosionproof protection film embodiment 1～10 in the ship's boiler of the present invention
Effect embodiment
Corrosionproof protection film 1:50g (4.6922wt%) stearylamine, 1000g (93.8438wt%) deionized water, 0.5g (0.0469wt%) alkyl sodium sulfonate, the secondary octanol of 15g (1.4077wt%) and 0.1g (0.0094wt%) methyl ethyl ketone oxime in the ship's boiler.
Corrosionproof protection film 2:80g (7.319wt%) stearylamine, 1000g (91.491wt%) deionized water, 0.8g (0.073wt%) alkylsulphonic acid amine, the secondary octanol of 6g (0.549wt%), 6g (0.549wt%) thanomin and 0.2g (0.018wt%) DMKO in the ship's boiler.
Corrosionproof protection film 3:100g (8.945wt%) stearylamine, 1000g (89.445wt%) deionized water, 1.5g (0.134wt%) sodium alkyl benzene sulfonate, the secondary octanol of 8g (0.716wt%), 8g (0.716wt%) thanomin and 0.5g (0.045wt%) saccharosonic acid in the ship's boiler.
Corrosionproof protection film 4:120g (10.499wt%) stearylamine, 1000g (87.489wt%) deionized water, 2g (0.175wt%) polyoxyethylene octylphenol ether (molecular weight 646), the secondary octanol of 10g (0.875wt%), 10g (0.875wt%) thanomin and 1g (0.087wt%) carbohydrazide in the ship's boiler.
Preparation method: earlier stearylamine is pulverized; place container; add entry; the limit edged stirs; and adding emulsifying agent, stablizer and oxygen scavenger; heat and remain on certain temperature (temperature, time is: 55 ℃～90 ℃ of temperature, time 5min～120min) stir and make it form uniform water miscible liquid, can make corrosionproof protection film in each ship's boiler.
Corrosionproof protection film 1～4 experimentizes in the above-mentioned ship's boiler of employing in certain ship's boiler:
(1) prepurging: adopt the method for logical auxilliary stove steam, purge is removed the greasy dirt of stove.Requiring after purge finishes does not have greasy dirt fully in the stove;
(2) boil stove: adopt the method that adds tertiary sodium phosphate to boil stove, remove incrustation scale in the stove, require the structure in the stove thing the least possible, the internal surface cleaning;
(3) film forming: inject the aqua of corrosionproof protection film in the ship's boiler the water service pipe from dosing pump toward economizer, interlock insulation 4-5 hour.
Experimental result sees the following form:
| Corrosionproof protection film in the ship's boiler | 1 | 2 | 3 | 4 |
| Contact angle/degree | 107.0 | 115.8 | 118.4 | 132.0 |
Illustrate: (1) because the sample surfaces situation there are differences, above data are the mean value of substantive test data.
(2) wettability evaluation:
Contact angle equals 0 degree, complete wetting;
Contact angle 0～90 the degree between, adhesive wetting;
Contact angle is between 90～180 degree, and is nonwetting substantially;
Contact angle equals 180 degree, and is nonwetting fully.
In addition, after embodiment 1～4 prepares, placed three months, solution still is emulsified state, stratified phenomenon do not occur, illustrates that corrosionproof protection film stability is high in the ship's boiler of the present invention, and the shelf time is long.
Claims (9)
1, corrosionproof protection film in a kind of ship's boiler is characterized in that containing: octadecylamine, emulsifying agent, stablizer, oxygen scavenger and water.
2, corrosionproof protection film in the ship's boiler as claimed in claim 1, it is characterized in that: the content of described octadecylamine is mass percent 1～15%.
3, corrosionproof protection film in the ship's boiler as claimed in claim 1, it is characterized in that: the content of described emulsifying agent is mass percent 0.001～0.2%.
4, corrosionproof protection film in the ship's boiler as claimed in claim 1, it is characterized in that: the content of described stablizer is mass percent 1～5%.
5, corrosionproof protection film in the ship's boiler as claimed in claim 1, it is characterized in that: the content of described oxygen scavenger is mass percent 0.001～0.1%.
6, corrosionproof protection film in the ship's boiler as claimed in claim 1, it is characterized in that: the content of described water is mass percent 80～95%.
7, corrosionproof protection film in the ship's boiler as claimed in claim 1, it is characterized in that: described emulsifying agent is one or more in alkyl sodium sulfonate, alkylsulphonic acid amine, sodium alkyl benzene sulfonate, Sodium dodecylbenzene sulfonate, Witco 1298 Soft Acid amine, sodium dibutyl naphthalene sulfonate, aerosol OT, polyoxyethylene octylphenol ether and the Viscotrol C sodium sulfonate.
8, corrosionproof protection film in the ship's boiler as claimed in claim 1, it is characterized in that: described stablizer is secondary octanol and/or thanomin.
9, corrosionproof protection film in the ship's boiler as claimed in claim 1, it is characterized in that: described oxygen scavenger is one or more in methyl ethyl ketone oxime, DMKO, saccharosonic acid, carbohydrazide and the diethyl hydroxylamine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100331920A CN101498001B (en) | 2008-01-29 | 2008-01-29 | Anti-corrosive protective film agent for marine boiler |
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| CN2008100331920A CN101498001B (en) | 2008-01-29 | 2008-01-29 | Anti-corrosive protective film agent for marine boiler |
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| CN101498001A true CN101498001A (en) | 2009-08-05 |
| CN101498001B CN101498001B (en) | 2010-11-24 |
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| CN102312244A (en) * | 2011-09-26 | 2012-01-11 | 张啸 | Thermal equipment operation cleaning agent and its application |
| 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 |
| CN102517589A (en) * | 2011-12-29 | 2012-06-27 | 广东电网公司电力科学研究院 | Film forming corrosion inhibitor and preparation method thereof |
| CN102560470A (en) * | 2012-01-17 | 2012-07-11 | 华东理工大学华昌聚合物有限公司 | Preparation and use method for shutdown protection solution of industrial boiler |
| CN102559154A (en) * | 2011-12-09 | 2012-07-11 | 中国石油集团川庆钻探工程有限公司 | Deoxidant for drilling fluid and preparation method for deoxidant |
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| CN103710711A (en) * | 2014-01-07 | 2014-04-09 | 北京化工大学 | Octadecylamine emulsion and preparation technology thereof |
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| 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 |
| CN102559154B (en) * | 2011-12-09 | 2013-10-30 | 中国石油集团川庆钻探工程有限公司 | Deoxidant for drilling fluid and preparation method for deoxidant |
| CN102559154A (en) * | 2011-12-09 | 2012-07-11 | 中国石油集团川庆钻探工程有限公司 | Deoxidant for drilling fluid and preparation method for deoxidant |
| CN102517589B (en) * | 2011-12-29 | 2013-10-30 | 广东电网公司电力科学研究院 | Film forming corrosion inhibitor and preparation method thereof |
| CN102517589A (en) * | 2011-12-29 | 2012-06-27 | 广东电网公司电力科学研究院 | Film forming corrosion inhibitor and preparation method thereof |
| CN102560470A (en) * | 2012-01-17 | 2012-07-11 | 华东理工大学华昌聚合物有限公司 | Preparation and use method for shutdown protection solution of industrial boiler |
| CN103103534B (en) * | 2012-11-13 | 2015-11-18 | 铜陵祥云消防科技有限责任公司 | A kind of Gas-phase corrosion inhibition antirust agent containing modified Nano bamboo charcoal powder |
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| CN103710711A (en) * | 2014-01-07 | 2014-04-09 | 北京化工大学 | Octadecylamine emulsion and preparation technology thereof |
| CN105734582A (en) * | 2016-05-05 | 2016-07-06 | 成都华气能源工程有限公司 | Organic film-forming amine corrosion inhibitor and application thereof |
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