CN1115306C - Corrosion-retarding scale inhibitor for boiler - Google Patents
Corrosion-retarding scale inhibitor for boiler Download PDFInfo
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- CN1115306C CN1115306C CN 98113064 CN98113064A CN1115306C CN 1115306 C CN1115306 C CN 1115306C CN 98113064 CN98113064 CN 98113064 CN 98113064 A CN98113064 A CN 98113064A CN 1115306 C CN1115306 C CN 1115306C
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Abstract
The present invention relates to a corrosion retardance scale inhibitor for boilers, which is prepared by combining organic phosphonic acid with high scale inhibition performance and zinc salts with high corrosion retardance performance and then adding a dispersion activating agent and an auxiliary corrosion inhibitor with favorable synergistic effects with the single component. The corrosion retardance scale inhibitor comprises the following raw materials: organic multi-phosphonic acid and salts thereof, polymaleic anhydride, zinc sulphate, nitrogen-containing heterocyclic compounds, alkyl ether and a solvent. The present invention has the advantages of high scale inhibition rate which is greater than 94%, low corrosion rate which is smaller than 0.03 mm/a, high temperature resistance and convenient use.
Description
The present invention relates to a kind of oiler feed and handle compound, especially a kind of corrosion-retarding scale inhibitor for boiler.
Boiler is the production of enterprise, public institution and family, service unit, indispensable heat power equipment in life, and it distributes extensively, quantity is many, occupies critical role in national economy and social security.(P≤1.6MPa) steam boiler more seems important on satisfying production and living with vapour, use hot water for hot water steel stove and low pressure.For long period, the safety and economic operation that guarantees boiler, except correct boiler operatiopn operation and maintenance, the quality and the water treatment mode of steel stove water are particularly important, if steel stove water water quality is controlled or is handled bad, after operation after a while, and on the heating surface that water contacts the solid-state dirt settling of one deck will appear.This dirt settling is because the underproof water of processing is in service in boiler, be heated, evaporate, concentrate, behind series of physical, chemical transformation, when surpassing solubility product, the content of some of them insoluble salt just on heating surface, deposits, in most cases settling combines with heating surface firmly, fine and close and hard, be called as dirt; Part is relatively loose, in conjunction with insecure or be suspended in that the person is called slag in the water, can discharge with the boiler periodic blow down.The existence harm of incrustation scale is very big, mainly is to reduce heat-economy.The thermal conductivity ratio iron and steel of dirt is little tens times even hundred times, makes the heat-transfer capability variation, the incrustation scale of thick 1mm, and fuel consumes 3-5% more in the time of just making boiler operatiopn, even bigger.Secondly,, usually can make metal be in superheat state, its physical strength is descended significantly, might deform, bulge even producer pipe explosive accident because the capacity of heat transmission of dirt is poor.The generation of dirt with increase, the actual internal area in the boiler tube is reduced, flow resistance increases, flow velocity reduces, and influences the normal output of boiler, influences normal steam supply heat supply; After the fouling, also might bring out the metallic corrosion under the settling (dirt), shorten the work-ing life of boiler.
In order to stop the generation of incrustation scale, and the many drawbacks that form incrustation scale, control feedwater water quality and correctly to carry out water conditioning extremely important.How the past people handle outward with the stove that ion exchange method and electroosmose process etc. is carried out feedwater, obtained certain effect, but this has just increased equipment and operation is invested, maintenance cost, simultaneously owing to reasons such as equipment and peopleware difference and chemical supervision are not in place, handle fouling generation as the same though feedwater is softening outside stove.For improving the boiler feedwater quality, reduce the water treatment expense, reduce discharge of wastewater, replace water technology outside traditional stove for the way that has occurred multiple water treatment agent such as direct interpolation anti-incrustation corrosion inhibitor in the water treatment at low pressure boiler in recent years, because of it can improve the boiler feedwater quality effectively, guarantee operating safety, economy, water saving, energy-conservation and save manpower and be widely adopted.
At present, available inhibiter mainly contains in industrial water supply: chromic salt, poly-phosphate, zinc salt, molybdate, tungstate, organic phosphonate, silicate and amine salt etc.In the middle of these inhibiter, organic phosphonate because of its have inhibition and scale inhibition double effects form headed by the selection kind, but only depend on the corrosion inhibition of organic phosphonate, its effect is still not ideal enough, also need add with it has synergistic inhibiter, to improve its preservative effect; Organic phosphine is that corrosion inhibiting and descaling agent is mainly used in the recirculated cooling water processing of production departments such as electric power, oil, chemical industry in addition, and use temperature is lower, is generally less than 80 ℃.Chromic salt bans use of because of the hexavalent chromium polluted-water.Poly-phosphate and amine salt heat resistance are relatively poor should not be used on boiler.Tungstate, molybdate price are more expensive, and silicate only is adapted to the water quality of PH between 6.5-7.5, and use range is too narrow.
The objective of the invention is for a kind of scale inhibition performance height, corrosion rate corrosion-retarding scale inhibitor for boiler low, high temperature resistant, easy to use are provided.Secondary objective of the present invention is for the corrosion-retarding scale inhibitor for boiler that a kind of addition is few, be difficult for inefficacy is provided.
Purpose of the present invention can be implemented by following measure:
A kind of corrosion-retarding scale inhibitor for boiler, with the material combination of the organic phosphine and the high corrosion inhibition of the high scale-inhibiting properties of tool, be aided with again with above-mentioned single-component have the dispersion activator of good synergistic effect, auxiliary inhibiter is made; It comprises following raw materials in percentage by weight: organic multicomponent phosphonic acids and salt 25-40%, polymaleic anhydride 30-45%, zinc sulfate 2-7%, nitrogen-containing heterocycle compound 1-3%, alkyl oxide 0.2-2%, its surplus is a solvent.
Secondary objective of the present invention also can realize by following measure:
Also can add thionamic acid in the raw material of described corrosion-retarding scale inhibitor for boiler, its consumption accounts for the 0.5-2% of corrosion inhibiting and descaling agent total amount.
The present invention has following advantage compared to existing technology:
1, the present invention is equipped with the nitrogen-containing heterocycle compound that the tool scale inhibition disperses, polymaleic anhydride, alkyl oxide and the tool of activation are assisted corrosion inhibition again with the zinc inorganic salt combination of organic multicomponent phosphonic acids and the salt and the high corrosion inhibition of tool of the high scale-inhibiting properties of tool; Compatibility of the present invention has been given full play to the synergistic effect between each component, and scale inhibition performance of the present invention is reached more than 94%, and corrosion speed is less than 0.03mm/a, and high temperature that can anti-150-200 ℃; Because the present invention adds auxiliary inhibiter, make the present invention not only corrosion inhibition be arranged in addition, simultaneously non-ferrous metal is also had corrosion inhibition ferrous metal.
2, the present invention is easy to use, need not to regulate pH value and cost is low when dosing, only is about 40% of the outer water treatment expense of stove.
3, also add sulfonic acid class protective material in the present invention's prescription, can shield, and be difficult for losing efficacy mixed composition of the present invention.
The present invention also will be described in further detail in conjunction with the embodiments:
Embodiment one:
A kind of corrosion-retarding scale inhibitor for boiler comprises following raw materials in percentage by weight: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid 32%, polymaleic anhydride 37%, zinc sulfate 5%, Wu Luotuoping 2%, sulfonic acid amber dioctyl ester salt 1.2%, its surplus is a water.With above-mentioned each raw material and water is composite forms.
Embodiment two:
A kind of corrosion-retarding scale inhibitor for boiler comprises following raw materials in percentage by weight: Amino Trimethylene Phosphonic Acid 26%, polymaleic anhydride 44%, zinc sulfate 3%, benzene a pair of horses going side by side three ammonia azoles 1.5%, sulfated butyl oleate 0.5%, its surplus is a water.With above-mentioned each raw material and water is composite forms.
Embodiment three:
A kind of corrosion-retarding scale inhibitor for boiler comprises following raw materials in percentage by weight: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid five sodium-salt 39%, polymaleic anhydride 30%, zinc sulfate 2%, thiocarbamide 3%, alkylphenol polyoxyethylene 1%, thionamic acid 1.5%, its surplus are water.With above-mentioned each raw material and water is composite forms.
Embodiment four:
A kind of corrosion-retarding scale inhibitor for boiler comprises following raw materials in percentage by weight: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid 29%, polymaleic anhydride 33%, zinc sulfate 7%, benzotriazole 1%, alkylphenol polyoxyethylene 2%, thionamic acid 2%, its surplus are water.With above-mentioned each raw material and water is composite forms.
Embodiment five:
A kind of corrosion-retarding scale inhibitor for boiler comprises following raw materials in percentage by weight: Amino Trimethylene Phosphonic Acid 35%, polymaleic anhydride 41%, zinc sulfate 4%, Wu Luotuoping 1.8%, alkylphenol polyoxyethylene 0.7%, its surplus are water.With above-mentioned each raw material and water is composite forms.
Claims (5)
1, a kind of corrosion-retarding scale inhibitor for boiler is characterized in that this corrosion inhibiting and descaling agent comprises following raw materials in percentage by weight:
Organic multicomponent phosphonic acids and salt 25-40% polymaleic anhydride 30-45% thereof
Zinc sulfate 2-7% nitrogen-containing heterocycle compound 1-3% alkyl oxide 0.2-2%, its surplus is a water.
2, corrosion-retarding scale inhibitor for boiler as claimed in claim 1 is characterized in that also can adding thionamic acid in the corrosion inhibiting and descaling agent raw material, and its consumption accounts for the 0.5-2% of corrosion inhibiting and descaling agent gross weight.
3, corrosion-retarding scale inhibitor for boiler as claimed in claim 1 is characterized in that organic multicomponent phosphonic acids and salt thereof are selected from a kind of in 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, Amino Trimethylene Phosphonic Acid, the 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid sodium.
4, corrosion-retarding scale inhibitor for boiler as claimed in claim 1 is characterized in that nitrogen-containing heterocycle compound is selected from a kind of in benzotriazole, Wu Luotuoping, the thiocarbamide.
5, corrosion-retarding scale inhibitor for boiler as claimed in claim 1 is characterized in that alkyl oxide is selected from a kind of in alkylphenol polyoxyethylene, butyl oleate sodium sulfate, the sulfonic acid amber dioctyl ester sodium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113064 CN1115306C (en) | 1998-12-23 | 1998-12-23 | Corrosion-retarding scale inhibitor for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113064 CN1115306C (en) | 1998-12-23 | 1998-12-23 | Corrosion-retarding scale inhibitor for boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1257841A CN1257841A (en) | 2000-06-28 |
| CN1115306C true CN1115306C (en) | 2003-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98113064 Expired - Fee Related CN1115306C (en) | 1998-12-23 | 1998-12-23 | Corrosion-retarding scale inhibitor for boiler |
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| Country | Link |
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| CN (1) | CN1115306C (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304306C (en) * | 2004-02-06 | 2007-03-14 | 张文利 | Corrosion inhibitor for steam condensate system of industrial boiler and process for manufacturing same |
| CN101139718B (en) * | 2006-09-04 | 2010-10-13 | 中国石油集团川庆钻探工程有限公司 | Multiple-effect solid inhibiting anti-scale rod |
| CN101805597B (en) * | 2010-03-11 | 2013-06-05 | 中国石油集团川庆钻探工程有限公司 | Solid corrosion and scale inhibitor for oil field |
| CN101781767B (en) * | 2010-03-11 | 2011-05-11 | 中国石油集团川庆钻探工程有限公司 | Preparation method of solid corrosion-inhibition scale-inhibition bar used for oil field |
| CN102285723A (en) * | 2010-06-21 | 2011-12-21 | 北京市壹清利达水处理技术服务中心 | Dust deposition inhibitor for dedusting water system in steel plant |
| CN101891308B (en) * | 2010-07-14 | 2011-06-08 | 苏长伟 | Preservative for high chloride ion circulating water and application thereof |
| CN102491480A (en) * | 2011-12-08 | 2012-06-13 | 上海德内克水处理设备有限公司 | Preparation method of steam recycling protecting agent |
| CN102633374B (en) * | 2012-04-13 | 2013-11-06 | 中国石油天然气股份有限公司 | Novel corrosion and scale inhibitor applicable to natural gas heating furnace |
| CN102765820A (en) * | 2012-07-19 | 2012-11-07 | 广州市特种承压设备检测研究院 | HEDP (hydroxyethylidenediphosphonic acid)-based organic corrosion and scale inhibitor for industrial boiler |
| CN103819012B (en) * | 2014-03-21 | 2015-07-08 | 山东省泰和水处理有限公司 | Scale and corrosion inhibitor for high-alkalinity and high-hardness water |
| CN105366822B (en) * | 2014-08-29 | 2018-03-20 | 中国石油化工股份有限公司 | A kind of low-phosphorus corrosion and scale inhibitor composition and low-phosphorus corrosion and scale inhibitor and its application |
| CN104386836B (en) * | 2014-11-25 | 2016-04-13 | 刘昌华 | A kind of scale inhibitor for electroplating wastewater processing and preparation method thereof |
| CN105112926B (en) * | 2015-09-15 | 2017-12-08 | 科谱研发技术中心（青岛）有限公司 | A kind of cleaning synergist of heat supply heating system |
| CN105220164B (en) * | 2015-10-21 | 2017-12-15 | 刘旸 | A kind of cleaning agent of heat supply heating system |
| CN105540884B (en) * | 2015-12-15 | 2018-08-28 | 攀枝花钢城集团瑞天安全环保有限公司 | Composite slow-corrosion scale resistor and preparation method thereof suitable for high temperature |
| CN107285491B (en) * | 2017-07-27 | 2020-11-10 | 卢永杰 | Scale inhibition, corrosion inhibition and sterilization composite water treatment agent and preparation method thereof |
| CN113667545A (en) * | 2020-05-13 | 2021-11-19 | 上海蓝浦清洗技术有限公司 | Descaling agent and cleaning system for descaling boiler by using same |
| CN113264598A (en) * | 2021-06-09 | 2021-08-17 | 西安瑞杰实业股份有限公司 | Scale inhibition agent for Yinba method blast furnace slag treatment system and preparation method and application thereof |
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1998
- 1998-12-23 CN CN 98113064 patent/CN1115306C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1257841A (en) | 2000-06-28 |
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