CN103334110A - Dissolving-dispersing detergent for scale in pipes of high-temperature high-pressure boiler superheater in power station - Google Patents
Dissolving-dispersing detergent for scale in pipes of high-temperature high-pressure boiler superheater in power station Download PDFInfo
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- CN103334110A CN103334110A CN2013102348984A CN201310234898A CN103334110A CN 103334110 A CN103334110 A CN 103334110A CN 2013102348984 A CN2013102348984 A CN 2013102348984A CN 201310234898 A CN201310234898 A CN 201310234898A CN 103334110 A CN103334110 A CN 103334110A
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Abstract
The invention belongs to the technical field of chemical cleaning and in particular relates to a dissolving-dispersing detergent for scale in pipes of a high-temperature high-pressure boiler superheater in power station. The dissolving-dispersing detergent comprises the following components in percentage by mass: 1%-4% of formic acid, 1%-6% of glycolic acid, 1%-5% of citric acid, 1%-5% of edetic acid, 0.1%-0.5% of a corrosion inhibitor, 0.1%-1% of surfactant and the balance of demineralized water. The detergent has good solubility and dispersity on iron oxide scale in the high-temperature high-pressure boiler superheater, especially has solubility and dispersity remarkably better than those of the detergent in the prior art on 12CrMoV oxide scale,. Moreover, the detergent has remarkable effects of complete cleaning and cleaning to achieve the purpose of cleaning the superheater in a circulating manner, so that the operation safety performance of the high-temperature high-pressure unit in the power station is remarkably improved, and the body safety of unit working personnel is ensured. Besides, the dissolving-dispersing detergent is suitable for cleaning a water supply system before a power station boiler, a coal saver, a water cooling wall and a superheater system.
Description
Technical field
The invention belongs to the chemical cleaning technique field, relate in particular to dirt dissolving dispersion clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station.
Background technology
Power station High Temperature High Pressure unit forms one deck dirt easily through operation for a long time in the superheater tube, major ingredient is the oxide compound of iron, this oxide compound comes off easily, cause superheater tube to stop up and cause booster, and fine particle can enter steam turbine with steam, blade is caused damage.The clean the boiler technology mainly adopts matting at present, adopts vertically arranged U-shaped pipe but superheater is general, can not discharge the boiler outside with scavenging solution if clean residue, will cause booster.High-temperature high-pressure boiler generally adopts the 12CrMoV material, under the high temperature and high pressure steam effect, forms the dirt of fouling densification, and conventional clean-out system is difficult to the dirt that this material forms is dissolved removal.
Therefore, develop a kind ofly to 12CrMoV oxidation scale dissolving and the good clean-out system of dispersing property, have very important meaning.
Summary of the invention
The present invention is directed to problems of the prior art, dirt dissolving dispersion clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station is provided, it is a kind of clean-out system that is applicable to ferric oxide dirt in the High Temperature High Pressure superheater, it is to ferric oxide dirt solvability and favorable dispersity in the high-temperature high-pressure boiler superheater, thereby reaches the purpose of wash cycles superheater.
For achieving the above object, the technical solution used in the present invention is:
The dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of power station, and it is to be made of according to mass percent following composition: formic acid: 1%～4%, and oxyacetic acid: 1%～6%, citric acid: 1%～5%, ethylenediamine tetraacetic acid (EDTA): 1%～5%, inhibiter: 0.1%～0.5%, tensio-active agent; 0.1%～1%, surplus is de-mineralized water.
Described inhibiter is organic acid inhibitor.
Described inhibiter be urotropine and (or) mercaptobenzothiazole.
Described tensio-active agent be sodium laurylsulfonate and (or) sodium lauryl sulfate.
The dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of described power station, be to be constituted according to mass percent by following composition: formic acid: 1%～4%, oxyacetic acid: 1%～6%, citric acid: 1%～5%, ethylenediamine tetraacetic acid (EDTA): 1%～5%, urotropine: 0.1%～0.5%, mercaptobenzothiazole: 0.1%～0.5%, sodium laurylsulfonate; 0.1%～1%, sodium lauryl sulfate 0.1%～1%, surplus is de-mineralized water.
The dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of described power station, and best preferred value is to be made of according to mass percent following composition: formic acid accounts for 1.5%, oxyacetic acid accounts for 3%, citric acid accounts for 1%, ethylenediamine tetraacetic acid (EDTA) accounts for 1%, urotropine accounts for 0.1%, mercaptobenzothiazole accounts for 0.2%, sodium laurylsulfonate accounts for 0.1%, de-mineralized water accounts for 93.1%.
The dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of described power station, and best preferred value is to be made of according to mass percent following composition: formic acid accounts for 1%, oxyacetic acid accounts for 3%, citric acid accounts for 1.5%, ethylenediamine tetraacetic acid (EDTA) accounts for 1%, urotropine accounts for 0.1%, mercaptobenzothiazole accounts for 0.2%, sodium laurylsulfonate accounts for 0.1%, de-mineralized water 93.1%.
The dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of described power station, and best preferred value is to be made of according to mass percent following composition: formic acid accounts for 1%, oxyacetic acid accounts for 2%, citric acid accounts for 1%, ethylenediamine tetraacetic acid (EDTA) accounts for 1%, urotropine accounts for 0.1%, mercaptobenzothiazole accounts for 0.2%, sodium laurylsulfonate accounts for 0.1%, de-mineralized water 94.6%.
The dirt dissolving disperses the purging method of clean-out system to be in the high-temperature high-pressure boiler superheater tube of described power station: aforesaid clean-out system, getting clean-out system in proportion, to be made into effective content be 3～10% de-mineralized water solution, it is 85 ℃～98 ℃ in temperature, when scavenging period is 8～20 hours, clean best results.
Advantage of the present invention and beneficial effect are: clean-out system of the present invention is to ferric oxide dirt solvability and favorable dispersity in the high-temperature high-pressure boiler superheater, especially the dissolving of 12CrMoV oxidation scale and dispersing property significantly are better than clean-out system of the prior art, dirt in the High Temperature High Pressure unit superheater tube of power station had thorough, the clean unusual effect of cleaning, and can reach the purpose of wash cycles superheater, the security of power station High Temperature High Pressure unit operation is significantly improved, also makes unit staff's personnel safety obtain guarantee simultaneously.The present invention is applicable to the cleaning of station boiler stokehold water feeding system, economizer, water wall, superheater system.
Embodiment
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid: 1%～4%, oxyacetic acid: 1%～6%, citric acid: 1%～5%, ethylenediamine tetraacetic acid (EDTA): 1%～5%, inhibiter: 0.1%～0.5%, tensio-active agent; 0.1%～1%, surplus is de-mineralized water.
Wherein the inhibiter described in the present invention is organic acid inhibitor, this organic acid inhibitor can select for use urotropine and (or) mercaptobenzothiazole all can.
Wherein the tensio-active agent described in the present invention be sodium laurylsulfonate and (or) sodium lauryl sulfate.
The preparation technology of clean-out system of the present invention is: weigh respectively by above-mentioned prescription, be dissolved in the de-mineralized water, stir and get final product.
During use, earlier this clean-out system is made into effective content and is 3～10% de-mineralized water solution, it is acid that clean-out system is, and uses bestly 85 ℃～98 ℃ of temperature, and scavenging period is 8～20 hours the bests.Very good to ferric oxide dirt solvability in the high-temperature high-pressure boiler superheater, especially to 12CrMoV being the dissolving of ferric oxide dirt and the good dispersity of superheater in the boiler of superheater material, cleaning the back does not have intergranular corrosion to 12CrMoV, and the erosion rate to the 12CrMoV steel after cleaning satisfies corresponding power industry standard.
The present invention is further detailed explanation for example below.
Embodiment 1:
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid accounts for 1.5%, oxyacetic acid accounts for 3%, citric acid accounts for 1%, ethylenediamine tetraacetic acid (EDTA) accounts for 1%, urotropine accounts for 0.1%, mercaptobenzothiazole accounts for 0.2%, sodium laurylsulfonate accounts for 0.1%, de-mineralized water accounts for 93.1%.
During enforcement, get the above-mentioned clean-out system of 300ml, under 98 ℃ condition, cleaning material is the superheater tube sample of 12CrMoV, manages sample after processing, long 50mm, and thick 3mm, scavenging period is 10 hours, and after the cleaning, descaling rate is 98.2%, and cleaning the back dissolution rate is 95.8%.
Embodiment 2:
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid accounts for 1%, oxyacetic acid accounts for 3%, citric acid accounts for 1.5%, ethylenediamine tetraacetic acid (EDTA) accounts for 1%, urotropine accounts for 0.1%, mercaptobenzothiazole accounts for 0.2%, sodium laurylsulfonate accounts for 0.1%, de-mineralized water 93.1%.
During enforcement, get the above-mentioned clean-out system of 300ml, under 98 ℃ condition, cleaning material is the superheater tube sample of 12Cr2MoWVTiB, manage sample after processing, long 50mm, thick 3mm, scavenging period are 10 hours, after the cleaning, descaling rate is 98.6%, and cleaning the back dissolution rate is 97.5%.
Embodiment 3:
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid accounts for 1%, oxyacetic acid accounts for 2%, citric acid accounts for 1%, ethylenediamine tetraacetic acid (EDTA) accounts for 1%, urotropine accounts for 0.1%, mercaptobenzothiazole accounts for 0.2%, sodium laurylsulfonate accounts for 0.1%, de-mineralized water 94.6%.
During enforcement, get the above-mentioned clean-out system of 300ml, under 98 ℃ condition, cleaning material is the superheater tube sample of 12CrMoV, manages sample after processing, long 50mm, and thick 3mm, scavenging period is 15 hours, and after the cleaning, descaling rate is 99.6%, and cleaning the back dissolution rate is 97.8%.
Embodiment 4:
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid: 1%, oxyacetic acid: 1%, citric acid: 1%, ethylenediamine tetraacetic acid (EDTA): 1%, urotropine: 0.1%, mercaptobenzothiazole: 0.1%, sodium laurylsulfonate: 0.1%, de-mineralized water 95.7%.
During enforcement, get the above-mentioned clean-out system of 300ml, clean under 95 ℃ condition, cleaning material is the superheater tube sample of 12CrMoV, manage sample after processing, long 50mm, thick 3mm, scavenging period are 15 hours, after the cleaning, descaling rate is 97.2%, and cleaning the back dissolution rate is 95.2%.Embodiment 5:
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid: 2%, oxyacetic acid: 3%, citric acid: 2.5%, ethylenediamine tetraacetic acid (EDTA): 2.5%, urotropine: 0.25%, mercaptobenzothiazole: 0.25%, sodium laurylsulfonate: 0.5%, de-mineralized water 89%.
During enforcement, get the above-mentioned clean-out system of 300ml, clean under 98 ℃ condition, cleaning material is the superheater tube sample of 12CrMoV, manage sample after processing, long 50mm, thick 3mm, scavenging period are 8 hours, after the cleaning, descaling rate is 96.5%, and cleaning the back dissolution rate is 96.3%.Embodiment 6:
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid: 2%, oxyacetic acid: 6%, citric acid: 1%, ethylenediamine tetraacetic acid (EDTA): 1%, urotropine: 0.4%, mercaptobenzothiazole: 0.1%, sodium laurylsulfonate: 1%, de-mineralized water 88%.
During enforcement, get the above-mentioned clean-out system of 300ml, clean under 85 ℃ condition, cleaning material is the superheater tube sample of 12CrMoV, manage sample after processing, long 50mm, thick 3mm, scavenging period are 10 hours, after the cleaning, descaling rate is 98.5%, and cleaning the back dissolution rate is 97.4%.Embodiment 7:
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid: 2%, oxyacetic acid: 4%, citric acid: 1%, ethylenediamine tetraacetic acid (EDTA): 1%, urotropine: 0.2%, mercaptobenzothiazole: 0.2%, sodium lauryl sulfate; 0.1%, de-mineralized water 91.5%.
During enforcement, get the above-mentioned clean-out system of 300ml, clean under 95 ℃ condition, cleaning material is the superheater tube sample of 12CrMoV, manage sample after processing, long 50mm, thick 3mm, scavenging period are 10 hours, after the cleaning, descaling rate is 95.8%, and cleaning the back dissolution rate is 96.7%.
Embodiment 8:
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid: 4%, oxyacetic acid: 1%, citric acid: 1%, ethylenediamine tetraacetic acid (EDTA): 1%, urotropine: 0.1%, mercaptobenzothiazole: 0.1%, sodium laurylsulfonate: 0.1%, sodium lauryl sulfate; 0.1%, de-mineralized water 92.6%.
During enforcement, get the above-mentioned clean-out system of 300ml, clean under 95 ℃ condition, cleaning material is the superheater tube sample of 12CrMoV, manage sample after processing, long 50mm, thick 3mm, scavenging period are 10 hours, after the cleaning, descaling rate is 95.5%, and cleaning the back dissolution rate is 94.6%.
Embodiment 9:
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid: 1%, oxyacetic acid: 1%, citric acid: 1%, ethylenediamine tetraacetic acid (EDTA): 5%, urotropine: 0.1%, sodium laurylsulfonate: 0.1%, de-mineralized water 91.8%.
During enforcement, get the above-mentioned clean-out system of 300ml, clean under 95 ℃ condition, cleaning material is the superheater tube sample of 12CrMoV, manage sample after processing, long 50mm, thick 3mm, scavenging period are 10 hours, after the cleaning, descaling rate is 92.2%, and cleaning the back dissolution rate is 91.7%.
Embodiment 10:
The present invention is that the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of a kind of power station, and it is to be made of according to mass percent following composition:
Formic acid: 1%, oxyacetic acid: 1%, citric acid: 5%, ethylenediamine tetraacetic acid (EDTA): 1%, mercaptobenzothiazole: 0.1%, sodium lauryl sulfate; 0.1%, de-mineralized water 91.8%.
During enforcement, get the above-mentioned clean-out system of 300ml, clean under 95 ℃ condition, cleaning material is the superheater tube sample of 12CrMoV, manage sample after processing, long 50mm, thick 3mm, scavenging period are 10 hours, after the cleaning, descaling rate is 93.6%, and cleaning the back dissolution rate is 94.7%.
Claims (9)
1. the dirt dissolving disperses clean-out system in the power station high-temperature high-pressure boiler superheater tube, and it is characterized in that: it is to be made of according to mass percent following composition:
Formic acid: 1%～4%, oxyacetic acid: 1%～6%, citric acid: 1%～5%, ethylenediamine tetraacetic acid (EDTA): 1%～5%, inhibiter: 0.1%～0.5%, tensio-active agent; 0.1%～1%, surplus is de-mineralized water.
2. the interior dirt dissolving of power station high-temperature high-pressure boiler superheater tube according to claim 1 disperses clean-out system, and it is characterized in that: described inhibiter is organic acid inhibitor.
3. the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of power station according to claim 1, it is characterized in that: described inhibiter be urotropine and (or) mercaptobenzothiazole.
4. the dirt dissolving disperses clean-out system in the high-temperature high-pressure boiler superheater tube of power station according to claim 1, it is characterized in that: described tensio-active agent be sodium laurylsulfonate and (or) sodium lauryl sulfate.
5. the interior dirt dissolving of power station high-temperature high-pressure boiler superheater tube according to claim 1 disperses clean-out system, and it is characterized in that: it is to be made of according to mass percent following composition:
Formic acid: 1%～4%, oxyacetic acid: 1%～6%, citric acid: 1%～5%, ethylenediamine tetraacetic acid (EDTA): 1%～5%, urotropine: 0.1%～0.5%, mercaptobenzothiazole: 0.1%～0.5%, sodium laurylsulfonate; 0.1%～1%, sodium lauryl sulfate 0.1%～1%, surplus is de-mineralized water.
6. the interior dirt dissolving of power station high-temperature high-pressure boiler superheater tube according to claim 1 disperses clean-out system, and it is characterized in that: its best preferred value is to be made of according to mass percent following composition:
Formic acid accounts for 1.5%, oxyacetic acid accounts for 3%, citric acid accounts for 1%, ethylenediamine tetraacetic acid (EDTA) accounts for 1%, urotropine accounts for 0.1%, mercaptobenzothiazole accounts for 0.2%, sodium laurylsulfonate accounts for 0.1%, de-mineralized water accounts for 93.1%.
7. the interior dirt dissolving of power station high-temperature high-pressure boiler superheater tube according to claim 1 disperses clean-out system, and it is characterized in that: its best preferred value is to be made of according to mass percent following composition:
Formic acid accounts for 1%, oxyacetic acid accounts for 3%, citric acid accounts for 1.5%, ethylenediamine tetraacetic acid (EDTA) accounts for 1%, urotropine accounts for 0.1%, mercaptobenzothiazole accounts for 0.2%, sodium laurylsulfonate accounts for 0.1%, de-mineralized water 93.1%.
8. the interior dirt dissolving of power station high-temperature high-pressure boiler superheater tube according to claim 1 disperses clean-out system, and it is characterized in that: its best preferred value is to be made of according to mass percent following composition:
Formic acid accounts for 1%, oxyacetic acid accounts for 2%, citric acid accounts for 1%, ethylenediamine tetraacetic acid (EDTA) accounts for 1%, urotropine accounts for 0.1%, mercaptobenzothiazole accounts for 0.2%, sodium laurylsulfonate accounts for 0.1%, de-mineralized water 94.6%.
9. the interior dirt dissolving of power station high-temperature high-pressure boiler superheater tube according to claim 1 disperses the purging method of clean-out system, it is characterized in that: as the described clean-out system of right 1-9, getting clean-out system in proportion, to be made into effective content be 3～10% de-mineralized water solution, it is 85 ℃～98 ℃ in temperature, when scavenging period is 8～20 hours, clean best results.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103741153A (en) * | 2014-01-18 | 2014-04-23 | 西安热工研究院有限公司 | Chemical cleaning corrosion inhibitor for scale cinder of superheater |
| CN106521519A (en) * | 2016-11-17 | 2017-03-22 | 江苏方天电力技术有限公司 | Cleaning agent for oxide skin of overheater and cleaning method thereof |
| CN110241430A (en) * | 2019-06-27 | 2019-09-17 | 湖南省湘电试验研究院有限公司 | A kind of composite organic acid contaminant removing cleaning agent and its application |
| CN112574828A (en) * | 2020-12-11 | 2021-03-30 | 河南丰达智能装备有限公司 | Formula and preparation method of cleaning agent for material scale dissolved out of pipeline in alumina plant |
| CN112779543A (en) * | 2020-12-25 | 2021-05-11 | 德蓝水技术股份有限公司 | Organic acid cleaning agent and preparation method thereof |
| CN113293386A (en) * | 2021-05-28 | 2021-08-24 | 西安热工研究院有限公司 | Chemical cleaning agent for insoluble scale of seawater desalination device |
| CN114622209A (en) * | 2021-11-25 | 2022-06-14 | 上海吴泾第二发电有限责任公司 | Pickling solution for efficient power station boiler final superheater and preparation method and application thereof |
| CN115058717A (en) * | 2022-06-30 | 2022-09-16 | 南京科润新材料技术有限公司 | Non-phosphorus neutral dedusting degreasing agent for metal coating pretreatment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103741153A (en) * | 2014-01-18 | 2014-04-23 | 西安热工研究院有限公司 | Chemical cleaning corrosion inhibitor for scale cinder of superheater |
| CN106521519A (en) * | 2016-11-17 | 2017-03-22 | 江苏方天电力技术有限公司 | Cleaning agent for oxide skin of overheater and cleaning method thereof |
| CN110241430A (en) * | 2019-06-27 | 2019-09-17 | 湖南省湘电试验研究院有限公司 | A kind of composite organic acid contaminant removing cleaning agent and its application |
| CN112574828A (en) * | 2020-12-11 | 2021-03-30 | 河南丰达智能装备有限公司 | Formula and preparation method of cleaning agent for material scale dissolved out of pipeline in alumina plant |
| CN112779543A (en) * | 2020-12-25 | 2021-05-11 | 德蓝水技术股份有限公司 | Organic acid cleaning agent and preparation method thereof |
| CN113293386A (en) * | 2021-05-28 | 2021-08-24 | 西安热工研究院有限公司 | Chemical cleaning agent for insoluble scale of seawater desalination device |
| CN114622209A (en) * | 2021-11-25 | 2022-06-14 | 上海吴泾第二发电有限责任公司 | Pickling solution for efficient power station boiler final superheater and preparation method and application thereof |
| CN115058717A (en) * | 2022-06-30 | 2022-09-16 | 南京科润新材料技术有限公司 | Non-phosphorus neutral dedusting degreasing agent for metal coating pretreatment |
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Application publication date: 20131002 |
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