CN101649240B - Multifunctional coal-fired energy-saving additive - Google Patents
Multifunctional coal-fired energy-saving additive Download PDFInfo
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- CN101649240B CN101649240B CN 200910147803 CN200910147803A CN101649240B CN 101649240 B CN101649240 B CN 101649240B CN 200910147803 CN200910147803 CN 200910147803 CN 200910147803 A CN200910147803 A CN 200910147803A CN 101649240 B CN101649240 B CN 101649240B
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Abstract
The invention provides a multifunctional coal-fired energy-saving additive for a boiler to remove coke and dust and prevent corrosion. The multifunctional coal-fired energy-saving additive comprises the following components by weight percent: 5-15 percent of potassium nitrate, 1-9 percent of copper nitrate, 4-12 percent of magnesium nitrate, 8-12 percent of zinc, 20-30 percent of sodium chloride, 10-20 percent of copper sulphate, 15-25 percent of aluminium nitrate and 1-7 percent of boric acid. The coal-fired additive has little dosage, occupies 0.02-0.05 percent of fuel, does not have toxicity, taste, corrosion or explosion dangers, is harmless for a human body and has no pollution for the environment.
Description
Technical field
The invention belongs to chemical industry boiler rinsing inwall technical field, be specifically related to a kind of additive for fire coal for boiler clinker removal.
Background technology
The problems such as the coking of coal firing boiler ubiquity burner hearth, dust stratification and corrosion.After boiler coke and dust stratification, can make capacity of boiler reduce, funnel temperature and flue gas resistance rise.Not only make combustion conditions worsen, reduce boiler thermal output, and cause the partial water circulatory troubles, even make overheated the burning out of part tube wall and be forced to blowing out.Therefore the harm of coal stove coking is very large, has a strong impact on safety and the economical operation of boiler.
Ash fouling on boiler surface is divided into free-running property dust stratification and cohesiveness dust stratification.The cohesiveness dust stratification occurs in the high-temperature part of boiler, and for example burner hearth is referred to as coking.Because coking intensity is high, physical method is difficult to remove, and has the characteristic of indeterminate growth, and the hazardness of bringing is very large.Coal-fired mineral substance characteristic is depended in the generation of coking, flyash in bunker coal center (temperature reaches 1450-1650 ℃) may all melt or surface melting, under normal circumstances, the combustion slag leaves combustion centre to be encountered before heating surface and should be cooled to solid state, after colliding with heating surface like this, still by combustion gas, is taken away, and unlikelyly causes coking, if slag is when clashing into heating surface, still keep melted state, stick on tube wall, form coking.
Add pharmaceutical chemicals and can change the reaction mechanism of mineral substance in stove, thereby change its fouling characteristics.Have the people to study and adopt chemical additive to remove the dust stratification on boiler surface since the thirties, the sixties, the additive that the copper of take is main component starts for solving the burner hearth coking, and has been developed to product in some countries use.Integrate decoking agent and dust-cleaning agent and mainly contain two large classes: oxidized form and salt type.The said products is generally that deashing is main, and decoking is auxiliary, or decoking is that main deashing is auxiliary, and have that dosage is large, the problem such as contaminate environment, decoking deashing are not thorough.
Summary of the invention
For the problems referred to above of prior art, the invention provides a kind of can be for boiler clinker removal, ash disposal and etch-proof multifunctional coal-fired energy-saving additive.
For achieving the above object, the invention provides a kind of multifunctional coal-fired energy-saving additive, it is to consist of the following composition: saltpetre 5-15 % by weight, cupric nitrate 1-9 % by weight, magnesium nitrate 4-12 % by weight, zinc 8-12 % by weight, sodium chloride 20-30 % by weight, sulfuric acid cave 10-20 % by weight, aluminum nitrate 15-25 % by weight, boric acid 1-7 % by weight.
Above-mentioned multifunctional coal-fired energy-saving additive preferably consists of the following composition: saltpetre 10 % by weight, cupric nitrate 7 % by weight, magnesium nitrate 8 % by weight, zinc 10 % by weight, sodium chloride 25 % by weight, sulfuric acid cave 15 % by weight, aluminum nitrate 20 % by weight, boric acid 5 % by weight.
Beneficial effect of the present invention is, on the one hand, additive for fire coal of the present invention can improve the fusing point of fuel eutectic in hot environment, and they can not be sticked on burner hearth metal wall; And can improve the fusing point of coking eutectic, and make its fusing secondary combustion, for example zinc can produce combustion-supporting gas when burner hearth and other auxiliary agent mixed firing, and sodium chloride can play the effect that makes the coking puffing; On the other hand, the metal wall at boiler often is subject to SO
3dew point corrosion, additive for fire coal of the present invention can with fuel in the effect of sulfide sour gas form the not activated compound of tool, play the corrosion prevention effect.In addition, additive for fire coal consumption of the present invention is few, is only 2/10000ths to five of fuel, and nontoxic, tasteless, corrosion-free, without explosion hazard, harmless, environmentally safe.
Embodiment
Embodiment 1 multifunctional coal-fired energy-saving additive and decoking application
1. the preparation of multifunctional coal-fired energy-saving additive:
By commercially available saltpetre 10 % by weight, cupric nitrate 7 % by weight, magnesium nitrate 8 % by weight, zinc 10 % by weight, sodium chloride 25 % by weight, sulfuric acid cave 15 % by weight, aluminum nitrate 20 % by weight, boric acid 5 % by weight are uniformly mixed after pulverizing.
2. above-mentioned additive for fire coal is used for to certain power station coal firing boiler.
In boiler operatiopn, by the boiler spy hole, to flame zone, be spilled into or add from the fire coal bucket.Addition is about 2/10000ths of coal-fired weight, when coking, slag are serious, for 5/10000ths of fuel adds once in every 12 hours.
2.1 funnel temperature changes
Use above-mentioned additive for fire coal after 3 months, funnel temperature reduces approximately 14 ℃.In general, the every reduction of exhaust gas temperature 10-15 ℃, boiler efficiency can improve approximately 1%.
2.2 two stage superheater outlet cigarette temperature changes
Use above-mentioned additive for fire coal after 3 months, the low 35-40 ℃ of two stage superheater outlet cigarette temperature drop.Two stage superheater outlet cigarette temperature descend explanation two stage superheater pipe group and before the caloric receptivity of heating surface (burner hearth, shielded) increase, heating surface coking constantly minimizing is the major cause that causes this variation.
2.3 boiler combustion stability
Boiler is used additive for fire coal after 3 months, and the coking degree reduces, and substantially can't see large coke button, thereby has effectively avoided the generation of the boiler extinguishment accident that causes because of Jiao that falls, has guaranteed unit safety, reliability service.
Claims (2)
1. a multifunctional coal-fired energy-saving additive, it is characterized in that, it is to consist of the following composition: saltpetre 5-15 % by weight, cupric nitrate 1-9 % by weight, magnesium nitrate 4-12 % by weight, zinc 8-12 % by weight, sodium chloride 20-30 % by weight, sulfuric acid cave 10-20 % by weight, aluminum nitrate 15-25 % by weight, boric acid 1-7 % by weight.
2. multifunctional coal-fired energy-saving additive according to claim 1, it is characterized in that, it is to consist of the following composition: saltpetre 10 % by weight, cupric nitrate 7 % by weight, magnesium nitrate 8 % by weight, zinc 10 % by weight, sodium chloride 25 % by weight, sulfuric acid cave 15 % by weight, aluminum nitrate 20 % by weight, boric acid 5 % by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910147803 CN101649240B (en) | 2009-06-12 | 2009-06-12 | Multifunctional coal-fired energy-saving additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910147803 CN101649240B (en) | 2009-06-12 | 2009-06-12 | Multifunctional coal-fired energy-saving additive |
Publications (2)
| Publication Number | Publication Date |
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| CN101649240A CN101649240A (en) | 2010-02-17 |
| CN101649240B true CN101649240B (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910147803 Active CN101649240B (en) | 2009-06-12 | 2009-06-12 | Multifunctional coal-fired energy-saving additive |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337170B (en) * | 2011-07-30 | 2016-01-20 | 晟通科技集团有限公司 | A kind of boiler decoking agent |
| CN102660350A (en) * | 2012-04-25 | 2012-09-12 | 邢岗 | Liquid state antiscorching agent for boiler |
| CN102786998B (en) * | 2012-07-24 | 2014-04-02 | 周丽琴 | Boiler coke preventing and eliminating agent |
| CN103409199B (en) * | 2013-08-22 | 2015-04-15 | 华北电力大学 | Biomass boiler anticorrosive agent, and preparation and application thereof |
| CN104327904A (en) * | 2014-10-30 | 2015-02-04 | 北京晟辉兴业科技有限公司 | Liquid boiler coking inhibitor |
| CN105779044B (en) * | 2016-04-08 | 2017-10-17 | 山东默锐环境产业股份有限公司 | A kind of additive for preventing high-alkali fuel from staiing coking and preparation method and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1177628A (en) * | 1997-09-30 | 1998-04-01 | 覃戊文 | Energy-saving sweetening smoke-abatment agent |
| CN1234428A (en) * | 1999-04-21 | 1999-11-10 | 北京东方大华科技有限责任公司 | Coal companying additive and preparing method thereof |
| CN1629262A (en) * | 2003-12-17 | 2005-06-22 | 王家财 | Coal additive |
-
2009
- 2009-06-12 CN CN 200910147803 patent/CN101649240B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1177628A (en) * | 1997-09-30 | 1998-04-01 | 覃戊文 | Energy-saving sweetening smoke-abatment agent |
| CN1234428A (en) * | 1999-04-21 | 1999-11-10 | 北京东方大华科技有限责任公司 | Coal companying additive and preparing method thereof |
| CN1629262A (en) * | 2003-12-17 | 2005-06-22 | 王家财 | Coal additive |
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| CN101649240A (en) | 2010-02-17 |
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