CN103387864A - Combustion-supporting liquid-state decoking agent - Google Patents
Combustion-supporting liquid-state decoking agent Download PDFInfo
- Publication number
- CN103387864A CN103387864A CN2012101402489A CN201210140248A CN103387864A CN 103387864 A CN103387864 A CN 103387864A CN 2012101402489 A CN2012101402489 A CN 2012101402489A CN 201210140248 A CN201210140248 A CN 201210140248A CN 103387864 A CN103387864 A CN 103387864A
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- decoking agent
- component
- decoking
- combustion
- agent
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Abstract
The invention discloses a combustion-supporting liquid-state decoking agent comprising the components of, by weight: 2-10% of KNO3, 1-6% of Cu(NO3)2.3H2O, 1-8% of Mg(NO3)2.7H2O, 1-5% of Fe(NO3)3.9H2O, 1-5% of Mn(NO3)2.9H2O, 8-15% of NH4NO3, and balance of H2O. The combustion-supporting liquid-state decoking agent provided by the invention has good decoking effect and low application cost. With the agent, fixed carbon burnout rate can be improved.
Description
Technical field
The invention belongs to the coal combustion technology field, be specifically related to a kind of combustion-supporting type liquid coke inhibitor.
Background technology
Coal firing boiler is in coal combustion process, and water wall surface easily produces coking, superheater, reheater piping fouling phenomenon, and the heat exchange efficiency of boiler is descended, and funnel temperature raises, and the pipeline heating surface at high temperature easily produces vitriol, corrosion pipeline.
The mechanism of boiler coke, dust stratification is: coal dust is when the boiler internal combustion, the burner hearth core temperature can reach 1700 ℃, ash content in coal dust and the fixed carbon that does not burn fully are in molten state, and a part flows to water wall, and another part forms dust stratification with flue gas through each superheater, reheater etc.Wherein, the ash content of molten state and do not burn carbon granule,, if namely be cooled to solid-stately before the contact water wall, directly form slag or with flue gas, discharge; If be still molten state when the contact water wall, can stick on water wall and form solid-state coke button, and constantly gather the coking of formation bulk, coal-fired burn-off rate is low.
In prior art, main by adding decoking agent, remove the dust deposition of heating surface.Decoking agent mostly is the solid state powder shape, and main component is villaumite, metal oxide, chromic salts, rare earth oxide etc., mainly has following shortcoming:
1, cost is high.The institute of decoking agent with medicament price own is high, and more than consumption was generally the thousandth of Coal-fired capacity, use cost was high; And the addition manner of decoking agent, interpolation equipment complexity, cost is high.
2, effect is unstable.Mealy medicine is when adding, and granular size differs, and be difficult to be uniformly dispersed, thereby its decoking effect is unstable.
3, boiler is produced corrosion.Chlorions in decoking agent etc. produce acid attack to boiler.
Summary of the invention
The object of the invention is to overcome above shortcoming, provide a kind of decoking effective, use cost is low, and can improve the combustion-supporting type liquid coke inhibitor of fixed carbon burnout rate.
Technical scheme of the present invention is:
A kind of combustion-supporting type liquid coke inhibitor, the component of described decoking agent and the weight percent of each component are: KNO
3: 2-10%; Cu (NO
3)
23H
2O:1-6%; Mg (NO
3)
27H
2O:1-8%; Fe (NO
3)
39H
2O:1-5%; Mn (NO
3)
29H
2O:1-5%; NH
4NO
3: 8-15%; H
2O: surplus.
Combustion-supporting type liquid coke inhibitor provided by the invention has following advantage:
1, liquid coke inhibitor provided by the invention, can prevent and remove dust stratification, coking.Decoking agent is liquid coke inhibitor, and each component is ionic condition in solution, at high temperature has stronger reactive behavior.Potassium in decoking agent, magnesium ion can promote the low melting component in ash content or coking to be converted into the high-melting-point composite salt, make its low temperature place in burner hearth keep solid-state and can't adhere on water wall, reach prevention and produce the purpose of coking.
KNO in decoking agent
3, Cu (NO
3)
2, Mg (NO
3)
2, Fe (NO
3)
3, Mn (NO
3)
2, NH
4NO
3Composition, at high temperature decompose and discharge a large amount of gases, makes ash content, burnt layer keep rarefaction, forms slag or by flue gas, taken away.Wherein, KNO
3, NH
4NO
3At high temperature slight blast can occur, the burnt layer that is attached on heat transfer tube is directly come off, form slag.After using liquid coke inhibitor provided by the invention, the dragveyer cinder is loose porous.
Liquid coke inhibitor provided by the invention, the medicament good dispersity, decoking agent fully contacts with coal-fired, further strengthens the decoking effect.
2, promote the fixed carbon particle burning, improve the coal burnout rate.Composition in decoking agent is nitrate, and nitrate at high temperature decomposes and produces oxygen, and increases stove internal combustion oxygen amount, makes the fixed carbon burning more abundant; Cupric ion in nitrate, iron ion, mn ion, as the carrier of oxygen, can increase the content of active oxygen in stove, promote the burning of fixed carbon, improve burnout rate.
But the K in decoking agent, Cu, Fe, Mn element catalysis coal polymer chain break, make coal combustion more abundant.
3, cost is low.Each component in decoking agent formula provided by the invention is material commonly used, and preparation cost is low; The usage quantity of decoking agent be 100,000 of Coal-fired capacity/to ten thousand/, use cost is low; Use decoking agent provided by the invention, can improve coal-fired efficiency of combustion, reduce coal-fired usage quantity, reduce the production cost of coal combustion.
4, the corrodibility to boiler is little.Composition in decoking agent is nitrate, and at high temperature resolvent is NO
x, compared with prior art, do not contain S, Cl element in decoking agent, eliminated decoking agent and boiler has been produced the impact of corrosion; Simultaneously, NO
xBe combined with fixed carbon, generate N
2, be disposed in air, environment is not exerted an influence.
Embodiment
Below in conjunction with embodiment, technical solution of the present invention is done further detailed description, but embodiments of the present invention are not limited to this.
Embodiment 1
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
The using method of liquid coke inhibitor is as follows:
1, the components in certain proportion of above-mentioned decoking agent is mixed, be heated to 40-60 ℃, stir simultaneously 1-2 hour, obtain liquid coke inhibitor after cooling;
2, cooled liquid coke inhibitor, to burner hearth, compressed-air actuated pressure is 0.3-0.7MPa by blast injection;
3, the addition of liquid coke inhibitor be 100,000 of fuel quantity/.
Embodiment 2
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
The components in certain proportion of above-mentioned decoking agent is mixed post-heating stirs, obtain liquid coke inhibitor, the addition of liquid coke inhibitor be 90,000 of fuel quantity/, decoking is effective.
Embodiment 3
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
The components in certain proportion of above-mentioned decoking agent is mixed post-heating stirs, obtain liquid coke inhibitor, the addition of liquid coke inhibitor be 50,000 of fuel quantity/, decoking is effective.
Embodiment 4
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
The components in certain proportion of above-mentioned decoking agent is mixed post-heating stirs, obtain liquid coke inhibitor, the addition of liquid coke inhibitor be 80,000 of fuel quantity/.
Embodiment 5
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
The components in certain proportion of above-mentioned decoking agent is mixed post-heating stirs, obtain liquid coke inhibitor, the addition of liquid coke inhibitor be 40,000 of fuel quantity/.
Embodiment 6
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
The components in certain proportion of above-mentioned decoking agent is mixed post-heating stirs, obtain liquid coke inhibitor, the addition of liquid coke inhibitor be 70,000 of fuel quantity/.
Embodiment 7
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
The components in certain proportion of above-mentioned decoking agent is mixed post-heating stirs, obtain liquid coke inhibitor, the addition of liquid coke inhibitor be 40,000 of fuel quantity/.
Embodiment 8
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
The components in certain proportion of above-mentioned decoking agent is mixed post-heating stirs, obtain liquid coke inhibitor, the addition of liquid coke inhibitor be 20,000 of fuel quantity/.
Embodiment 9
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
The components in certain proportion of above-mentioned decoking agent is mixed post-heating stirs, obtain liquid coke inhibitor, the addition of liquid coke inhibitor be 30,000 of fuel quantity/.
Embodiment 10
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
The components in certain proportion of above-mentioned decoking agent is mixed post-heating stirs, obtain liquid coke inhibitor, the addition of liquid coke inhibitor be 50,000 of fuel quantity/.
Claims (2)
1. a combustion-supporting type liquid coke inhibitor, is characterized in that, the component of described decoking agent and the weight percent of each component are:
KNO
3：2-10%；
Cu(NO
3)
2·3H
2O：1-6%；
Mg(NO
3)
2·7H
2O：1-8%；
Fe(NO
3)
3·9H
2O：1-5%；
Mn(NO
3)
2·9H
2O：1-5%；
NH
4NO
3：8-15%；
H
2O: surplus.
2. combustion-supporting type liquid coke inhibitor according to claim 1, is characterized in that, the component of described decoking agent and the weight percent of each component are:
KNO
3：4-8%；
Cu(NO
3)
2·3H
2O：1-4%；
Mg(NO
3)
2·7H
2O：2-6%；
Fe(NO
3)
3·9H
2O：1.5-3%；
Mn(NO
3)
2·9H
2O：1-2%；
NH
4NO
3：8-11%；
H
2O: surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101402489A CN103387864A (en) | 2012-05-08 | 2012-05-08 | Combustion-supporting liquid-state decoking agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101402489A CN103387864A (en) | 2012-05-08 | 2012-05-08 | Combustion-supporting liquid-state decoking agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103387864A true CN103387864A (en) | 2013-11-13 |
Family
ID=49532287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101402489A Pending CN103387864A (en) | 2012-05-08 | 2012-05-08 | Combustion-supporting liquid-state decoking agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103387864A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513450A (en) * | 2016-06-16 | 2017-12-26 | 新特能源股份有限公司 | A kind of coke-removing agent, the system and preparation method for preparing coke-removing agent |
| CN115418258A (en) * | 2022-09-14 | 2022-12-02 | 滁州智慧城市环保科技有限责任公司 | Boiler coking inhibitor and preparation method thereof |
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| CN1086249A (en) * | 1992-10-21 | 1994-05-04 | 袁旭 | High-efficiency coal catalyst |
| CN1487262A (en) * | 2003-06-27 | 2004-04-07 | 琦 戴 | Boiler coke eliminating agent |
| CN101070502A (en) * | 2007-06-01 | 2007-11-14 | 北京科技大学 | Ash-coke-removal fire-aid anti-corrosion additive for use on fire-side of boiler |
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| CN102337170A (en) * | 2011-07-30 | 2012-02-01 | 湖南晟通科技集团有限公司 | Boiler clinker removal agent |
-
2012
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| CN1086249A (en) * | 1992-10-21 | 1994-05-04 | 袁旭 | High-efficiency coal catalyst |
| CN1487262A (en) * | 2003-06-27 | 2004-04-07 | 琦 戴 | Boiler coke eliminating agent |
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| CN101338237A (en) * | 2008-08-08 | 2009-01-07 | 西安交通大学 | Preparation of ash-cleaning and coke-removing agent for city domestic refuse incinerator |
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| Title |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513450A (en) * | 2016-06-16 | 2017-12-26 | 新特能源股份有限公司 | A kind of coke-removing agent, the system and preparation method for preparing coke-removing agent |
| CN107513450B (en) * | 2016-06-16 | 2019-10-18 | 新特能源股份有限公司 | A kind of coke-removing agent, the system and preparation method for preparing coke-removing agent |
| CN115418258A (en) * | 2022-09-14 | 2022-12-02 | 滁州智慧城市环保科技有限责任公司 | Boiler coking inhibitor and preparation method thereof |
| CN115418258B (en) * | 2022-09-14 | 2024-03-22 | 滁州智慧城市环保科技有限责任公司 | Boiler coking inhibitor and preparation method thereof |
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| C06 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
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Application publication date: 20131113 |