CN103525599A - Boiler scale remover - Google Patents
Boiler scale remover Download PDFInfo
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- CN103525599A CN103525599A CN201310435929.2A CN201310435929A CN103525599A CN 103525599 A CN103525599 A CN 103525599A CN 201310435929 A CN201310435929 A CN 201310435929A CN 103525599 A CN103525599 A CN 103525599A
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Abstract
The invention provides a remover used for cleaning scale existing in a boiler. The remover used for cleaning scale existing in the boiler comprises 1,4-butynediol, hydrochloric acid with the mass percentage concentration of 30-40%, 2-methacryloyloxyethyltrimethylammonium chloride salt, fatty alcohol-polyoxyethylene ether, tin dichloride, hydrofluoric acid with the mass percentage concentration of 25-35% and the balance of water. The novel remover used for cleaning scale existing in the boiler has a good cleaning effect on massive scales, such as CaCO3 and CaSO4, produced in a using process of the boiler; meanwhile, the remover used for cleaning scale existing in the boiler can not corrode a boiler body, and normal water quality of boiler water is guaranteed.
Description
Technical field
The present invention relates to cleaning boiler technical field, relate in particular to a kind of remover of the incrustation existing for boiler rinsing.
Background technology
In boiler attendance process, in water pipe or in heat conductive wall, can deposit gradually hard water-fast crystalline solid, this solid is called incrustation.For instance, hard thing is as calcium carbonate, CaCO
3with calcium sulfate CaSO
4to can not be increased in the solubleness in water, and in some cases, when water temperature increases, can become insoluble, so these become branches because concentrating of heating and water is deposited in heat conductive wall, thereby be deposited in heated wall as incrustation.The salt that also can occur not too to dissolve easily in water, as Calcium hydrogen carbonate, Ca (HCO
3)
2because heating is transformed into water-fast salt, i.e. calcium carbonate, CaCO
3thereby, cause incrustation.
Once be deposited in heat conductive wall, incrustation will cause variety of issue.First low the arriving of thermal conductivity due to incrustation is percentum of supplying pipe (ball-mill steel), be deposited on incrustation in heat conductive wall and will reduce combustion flame to water in water pipe, be the heat transmission of feedwater, thereby greatly reduce thermo-efficiency, fuel consumption is increased.In addition,, once flame reduces to the heat transfer of feedwater, the temperature of heat conductive wall can raise and the metal strength of heat conductive wall will decline.Because water pipe inside is conventionally in high pressure, the metal strength of heat conductive wall can not be born the internal pressure in water pipe, and this will cause, and water pipe expands, breaks, fracture or other accident.。
In order to prevent incrustation, people take such certain methods, for example, by water softening apparatus or other device, soften water inlet, and the concentration that makes to form the composition of incrustation by emission control remains in its solubility range, or make hard thing and deposition agent form slag charge.These methods are done detailed explanation below.Thereby the method for first softening boiler feed water by water softening apparatus or other device is a kind of hard thing that makes to form in boiler feed water incrustation is removed, is prevented thus the method for incrustation deposition as calcium ion and magnesium ion are replaced as sodium ion by the Zeo-karb in the soft device of water.
In addition, the method in its solubility range of the concentration that forms the composition of incrustation being remained on by emission control is a kind of feedwater to be regularly discharged into the method that system outside is conscientiously controlled, thereby the concentration that forms the composition of incrustation in feedwater is remained in their solubility range, prevent thus incrustation deposition.But excessive discharge will cause the problem that boiler furnace is more perishable and thermosteresis is too large.
In addition, make firmly to expect that method that composition and precipitating agent form slag charge is a kind ofly before forming incrustation by hard material, to adopt a kind of reagent will firmly expect to be transformed into the method for slag charge away from the place that easily forms the water pipe internal surface of incrustation, this slag charge has than lower water-soluble of incrustation, then the slag charge of generation discharged and from this system, removed when discharging each time, thereby suppress incrustation, occurring.The method adopts phosphate base reagent as reagent conventionally, but recent years people phosphorus has been formulated to more and more stricter emission regulation, so the method is difficult to carry out.
As noted earlier, people have adopted methods for preventing incrustation deposition, but these methods are difficult to prevent completely incrustation deposition, so people need to remove the incrustation of deposition.Incrustation is too hard, so that can not remove with mechanical means, therefore conventionally by pickling, removes.For the incrustation only being formed by hard thing, can adopt and add the method for hydrochloric acid heating dissolve and remove incrustation.For the another kind of incrustation being combined by hard thing and silicon-dioxide, because this incrustation can not only be removed by hydrochloric acid, therefore need to be by adopting hydrochloric acid and fluorochemical to dissolve and removing incrustation.For the iron-based incrustation being produced by iron cpd, need to adopt citric acid to dissolve and remove incrustation in addition.
But when carrying out pickling, boiler must be stopped work and can be produced some problems, and for example boiler material iron is because sour effect is corroded.In addition, when adopting hydrochloric acid, particularly during fluorine-based reagent, because existing higher danger, they must process very carefully these reagent.
Although people adopt the reagent being mainly comprised of phosphonic acids to remove incrustation in boiler attendance, and if these reagent are acid they are joined in feedwater in a large number, they will cause corrosion to boiler furnace.Therefore, people need a kind ofly to adopt neutrality or alkaline reagents effectively to remove incrustation but can not cause the method for above-mentioned etching problem, and said reagent can guarantee the water quality of normal feedwater.
Summary of the invention
The present invention does in view of the above problems, and its object is to provide a kind of remover of the novel boiler scale existing for boiler rinsing, and it is to the calcium carbonate CaCO producing in boiler use procedure
3with calcium sulfate CaSO
4etc. a large amount of incrustation, have good cleaning performance, meanwhile, this remover can not corrode boiler furnace, guarantees the water quality of normal feedwater.
For solving the problems of the technologies described above, the invention provides a kind of remover of the incrustation existing for boiler rinsing, it comprises hydrofluoric acid that hydrochloric acid, methylacryoyloxyethyl ammonium chloride, fatty alcohol-polyoxyethylene ether, tindichloride, mass percentage concentration that Isosorbide-5-Nitrae-butynediol, mass percentage concentration are 30%～40% are 25%～35% and the water of surplus.
In described remover, the weight percentage of each component is respectively hydrofluoric acid 2.6%～4.1% that hydrochloric acid 3%～5%, methylacryoyloxyethyl ammonium chloride 2.1%～4.9%, fatty alcohol-polyoxyethylene ether 1.5%～2.7%, tindichloride 1.3%～4.6%, mass percentage concentration that Isosorbide-5-Nitrae-butynediol 2%～4%, mass percentage concentration are 30%～40% are 25%～35% and the water of surplus.
In described remover, the weight percentage of each component is further preferably respectively hydrofluoric acid 3% that hydrochloric acid 4%, methylacryoyloxyethyl ammonium chloride 3%, fatty alcohol-polyoxyethylene ether 2%, tindichloride 3%, mass percentage concentration that Isosorbide-5-Nitrae-butynediol 3%, mass percentage concentration are 30%～40% are 25%～35% and the water of surplus.
The pH value of prepared remover is 6～7.
The present invention also provides and has adopted above-mentioned boiler remover to carry out the method for boiler scale removal, is specially:
The first step, selects above-mentioned boilercompound, and consumption is determined according to equipment and boiler tubing situation;
Second step, clean-out system stoste is added by recycle pump suction port, forms circulation;
The 3rd step, according to equipment dirt amount, moves 3 to 8 hours, by recycle pump, keeps clean-out system to circulate, and scavenging period and clean-out system flow velocity are inversely proportional to;
The 4th step, then with clear water displacement blowdown to turbidity < 10mg/L, or range estimation water clear till.
Beneficial effect of the present invention:
The remover of the novel boiler scale existing for boiler rinsing provided by the invention, it is to the calcium carbonate CaCO producing in boiler use procedure
3with calcium sulfate CaSO
4etc. a large amount of incrustation, have good cleaning performance, meanwhile, this remover can not corrode boiler furnace, guarantees the water quality of normal feedwater.
Embodiment
The invention provides a kind of remover of the incrustation existing for boiler rinsing, it comprises hydrofluoric acid that hydrochloric acid, methylacryoyloxyethyl ammonium chloride, fatty alcohol-polyoxyethylene ether, tindichloride, mass percentage concentration that Isosorbide-5-Nitrae-butynediol, mass percentage concentration are 30%～40% are 25%～35% and the water of surplus.
In described remover, the weight percentage of each component is respectively hydrofluoric acid 2.6%～4.1% that hydrochloric acid 3%～5%, methylacryoyloxyethyl ammonium chloride 2.1%～4.9%, fatty alcohol-polyoxyethylene ether 1.5%～2.7%, tindichloride 1.3%～4.6%, mass percentage concentration that Isosorbide-5-Nitrae-butynediol 2%～4%, mass percentage concentration are 30%～40% are 25%～35% and the water of surplus.
In described remover, the weight percentage of each component is further preferably respectively hydrofluoric acid 3% that hydrochloric acid 4%, methylacryoyloxyethyl ammonium chloride 3%, fatty alcohol-polyoxyethylene ether 2%, tindichloride 3%, mass percentage concentration that Isosorbide-5-Nitrae-butynediol 3%, mass percentage concentration are 30%～40% are 25%～35% and the water of surplus.
The pH value of prepared remover is 6～7.
Pipe scale is in incrustation remover provided by the invention, and molten dirt, corrosion of metal and passivation behavior are mild.Along with dirt is constantly eliminated, when hydrogen ion progressively consumes, in solution, produce voluntarily hydrogen ion and supplement.When the speed of hydrogen ion consumption is greater than the speed that hydrogen ion generates voluntarily, when dirty full scale clearance is fallen, in solution, hydrogen ion and pH value are in a steady state value.When hydrogen ion wear rate is greater than its generating rate, clean at the end, the pH of solution reduces, and hydrogen ion concentration is increased to a steady state value.
Isosorbide-5-Nitrae-butynediol is as a kind of inhibiter, and it is adsorbed on metallic surface except the form with triple bond two electronics, and the H adjacent with triple bond is reactive hydrogen atom, can provide proton to the electron rich cathodic area of metal.In addition, on hydroxyl, Sauerstoffatom electron density is high, also strengthens its absorption to metal.
Fatty alcohol-polyoxyethylene ether: being called for short JFC, having osmosis, is also to have fixing hydrophilic and oleophilic group, can align on the surface of solution, and the material that can make surface tension significantly decline.
Tindichloride can stop the corrosion of oxidisability example to iron brass ware such as ferric iron, cupric as inhibiter.
Hydrofluoric acid not only can dissolve silicates dirt, and can accelerate Fe
2o
3and magnetic Fe
3o
4segregation, so be the good clean-out system of boiler mill scale, iron dirt, iron rust.Hydrofluoric acid and Fe
3o
4during contact, first carry out fluoro-oxygen exchange, then carry out F
-complexing action.The F being generated by dissociation
-ion has a pair of lone electron pair, very easily inserts with Fe3
+centered by the unoccupied orbital of valence shell of ion, form the complex compound that O joins key, i.e. iron-iron-sodium aluminum fluoride, thereby ferric oxide is dissolved.
The present invention adopts the mixing acid of hydrochloric acid and hydrofluoric acid as scale remover, two kinds of strong acid collocation of chlorine and fluorine, and descale effect is better; the inhibiter adopting; there is to better protecting effect metallic surface, reaches decontamination contaminant releasing, reduce to greatest extent the corrosive nature of acid to metallic surface.
The present invention also provides and has adopted above-mentioned boiler remover to carry out the method for boiler scale removal, is specially:
The first step, selects above-mentioned boilercompound, and consumption is determined according to equipment and boiler tubing situation;
Second step, clean-out system stoste is added by recycle pump suction port, forms circulation;
The 3rd step, according to equipment dirt amount, moves 3 to 8 hours, by recycle pump, keeps clean-out system to circulate, and scavenging period and clean-out system flow velocity are inversely proportional to;
The 4th step, then with clear water displacement blowdown to turbidity < 10mg/L, or range estimation water clear till.
During use, this scale remover is joined in feedwater, thereby make its concentration in feedwater remain on 500-5000ppm, be preferably 2000-3000ppm.An example of this adition process is when discharge rate is 10%, adds continuously this scale remover.Thereby making scale remover is 200-300ppm with respect to the total amount of feedwater.Another example is that this scale remover is concentrated and added, thereby make scale remover, with respect to the total amount of feedwater, is 2000-3000ppm, and feedwater is discharge completely regularly.
Below adopt embodiment to describe embodiments of the present invention in detail, to the present invention, how utilisation technology means solve technical problem whereby, and the implementation procedure of reaching technique effect can fully understand and implement according to this.
The preparation of embodiment 1 boiler scale remover
At room temperature by 1, the hydrofluoric acid 3g that the hydrochloric acid 4g that 4-butynediol 3g, mass percentage concentration are 40%, methylacryoyloxyethyl ammonium chloride 3g, fatty alcohol-polyoxyethylene ether 2g, tindichloride 3g, mass percentage concentration are 30% and 82g water mix, form remover, pH value is 6.2.
To pondage, be about in the boiler (pilot boiler) of 0.15 liter and add softening water and the under atmospheric pressure operation that contains the hard thing of 0.4ppm, in this boiler, formed the incrustation being formed by hard thing and carbonate and the incrustation being formed by hard thing and silicon-dioxide.In this operating process, remover is added and every 2 hours, feedwater is poured out completely, the concentration in feedwater remains under 2000-3000ppm simultaneously, and result shows, adopts reagent of the present invention can obtain particularly preferred descale effect.
All above-mentioned these intellecture properties of primary enforcement, do not set restriction this product innovation of other forms of enforcement and/or novel method.Those skilled in the art will utilize this important information, and foregoing is revised, to realize similar implementation status.But all modifications or transformation belong to the right of reservation based on product innovation of the present invention.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (5)
1. the remover of the incrustation existing for boiler rinsing, it is characterized in that, comprise: the hydrofluoric acid that the hydrochloric acid that Isosorbide-5-Nitrae-butynediol, mass percentage concentration are 30%～40%, methylacryoyloxyethyl ammonium chloride, fatty alcohol-polyoxyethylene ether, tindichloride, mass percentage concentration are 25%～35% and the water of surplus.
2. remover as claimed in claim 1, it is characterized in that: in described remover, the weight percentage of each component is respectively hydrofluoric acid 2.6%～4.1% that hydrochloric acid 3%～5%, methylacryoyloxyethyl ammonium chloride 2.1%～4.9%, fatty alcohol-polyoxyethylene ether 1.5%～2.7%, tindichloride 1.3%～4.6%, mass percentage concentration that Isosorbide-5-Nitrae-butynediol 2%～4%, mass percentage concentration are 30%～40% are 25%～35% and the water of surplus.
3. remover as claimed in claim 1, it is characterized in that: in described remover, the weight percentage of each component is further preferably respectively hydrofluoric acid 3% that hydrochloric acid 4%, methylacryoyloxyethyl ammonium chloride 3%, fatty alcohol-polyoxyethylene ether 2%, tindichloride 3%, mass percentage concentration that Isosorbide-5-Nitrae-butynediol 3%, mass percentage concentration are 30%～40% are 25%～35% and the water of surplus.
4. remover as claimed in claim 1, is characterized in that: the pH value of described remover is 6～7.
5. the method that described in employing claim 1 to 4, boiler remover carries out boiler scale removal, is characterized in that:
The first step, selects above-mentioned boilercompound, and consumption is determined according to equipment and boiler tubing situation;
Second step, clean-out system stoste is added by recycle pump suction port, forms circulation;
The 3rd step, according to equipment dirt amount, moves 3 to 8 hours, by recycle pump, keeps clean-out system to circulate, and scavenging period and clean-out system flow velocity are inversely proportional to;
The 4th step, then with clear water displacement blowdown to turbidity < 10mg/L, or range estimation water clear till.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310435929.2A CN103525599A (en) | 2013-09-23 | 2013-09-23 | Boiler scale remover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310435929.2A CN103525599A (en) | 2013-09-23 | 2013-09-23 | Boiler scale remover |
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|---|---|
| CN103525599A true CN103525599A (en) | 2014-01-22 |
Family
ID=49927954
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|---|---|---|---|
| CN201310435929.2A Pending CN103525599A (en) | 2013-09-23 | 2013-09-23 | Boiler scale remover |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550099A (en) * | 2014-12-18 | 2015-04-29 | 广州飞机维修工程有限公司 | Automatic cleaning system for civil aircraft kitchen water boiler |
| CN104949570A (en) * | 2014-03-26 | 2015-09-30 | 东莞新科技术研究开发有限公司 | Method for washing boiler |
| CN105295924A (en) * | 2014-07-24 | 2016-02-03 | 气体产品与化学公司 | Titanium nitride hard mask and etch residue removal |
| CN105505640A (en) * | 2014-09-25 | 2016-04-20 | 武汉凌科达科技有限公司 | Novel scale remover for boiler |
| CN105505639A (en) * | 2014-09-25 | 2016-04-20 | 武汉凌科达科技有限公司 | Boiler scale remover |
| US9472420B2 (en) | 2013-12-20 | 2016-10-18 | Air Products And Chemicals, Inc. | Composition for titanium nitride hard mask and etch residue removal |
| CN106830375A (en) * | 2017-01-24 | 2017-06-13 | 北京市朝阳区特种设备检测所 | A kind of hot-water boiler antisludging agent and its application method |
| CN109576088A (en) * | 2018-12-21 | 2019-04-05 | 上海应用技术大学 | A kind of preparation method for the scale cleaning agent that changes colour |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9472420B2 (en) | 2013-12-20 | 2016-10-18 | Air Products And Chemicals, Inc. | Composition for titanium nitride hard mask and etch residue removal |
| CN104949570A (en) * | 2014-03-26 | 2015-09-30 | 东莞新科技术研究开发有限公司 | Method for washing boiler |
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| CN106830375A (en) * | 2017-01-24 | 2017-06-13 | 北京市朝阳区特种设备检测所 | A kind of hot-water boiler antisludging agent and its application method |
| CN106830375B (en) * | 2017-01-24 | 2020-06-30 | 北京市朝阳区特种设备检测所 | Scale inhibitor for hot water boiler and application method thereof |
| CN109576088A (en) * | 2018-12-21 | 2019-04-05 | 上海应用技术大学 | A kind of preparation method for the scale cleaning agent that changes colour |
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Application publication date: 20140122 |