CN103387862A - Sulfur-fixing liquid-state decoking agent - Google Patents
Sulfur-fixing liquid-state decoking agent Download PDFInfo
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- CN103387862A CN103387862A CN2012101402493A CN201210140249A CN103387862A CN 103387862 A CN103387862 A CN 103387862A CN 2012101402493 A CN2012101402493 A CN 2012101402493A CN 201210140249 A CN201210140249 A CN 201210140249A CN 103387862 A CN103387862 A CN 103387862A
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- decoking
- sulfur
- component
- decoking agent
- agent
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Abstract
The invention discloses a sulfur-fixing liquid-state decoking agent. The decoking agent comprises the components of, by weight: 6-10% of KNO3, 1-3.5% of Cu(NO3)2.3H2O, 2-6% of Mg(NO3)2.7H2O, 2-5% of Al(NO3)3.9H2O, 10-15% of NH4NO3, and balance of H2O. The sulfur-fixing liquid-state decoking agent provided by the invention has the advantages of good decoking effect and high sulfur-fixing rate.
Description
Technical field
The invention belongs to the coal combustion technology field, be specifically related to a kind of sulfur-fixing 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 generates 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 burnout 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.The SO that produces in coal combustion process
2Gas, at high temperature easily generate vitriol, corrosion pipeline; And the chlorion 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, the sulfur-fixing type liquid coke inhibitor that sulfur-fixing rate is high.
Technical scheme of the present invention is:
A kind of sulfur-fixing type liquid coke inhibitor, the component of described decoking agent and the weight percent of each component are: KNO
3: 6-10%; Cu (NO
3)
23H
2O:1-3.5%; Mg (NO
3)
27H
2O:2-6%; Al (NO
3)
39H
2O:2-5%; NH
4NO
3: 10-15%; H
2O: surplus.
Sulfur-fixing 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, aluminum 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.
Cu (NO in decoking agent
3)
2, Mg (NO
3)
2, Al (NO
3)
3, 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, 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, sulfur-fixing rate is high.SO
3Can form the complex vitriolate of infusibility with potassium ion, magnesium ion, the aluminum ion in decoking agent, reduce the corrosion of heat exchanging pipeline; Simultaneously potassium ion, magnesium ion, aluminum ion can catalysis ash content of coal and SO
3Reacting generating salt forms slag, has reduced SO
2Quantity discharged, sulfur-fixing rate reaches more than 20%.
3, 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, as the carrier of oxygen, can increase the content of active oxygen in stove, promotes the burning of fixed carbon, improves burnout rate.
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, alleviated the infection that decoking agent produces boiler; 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)
| Component | KNO 3 | Cu(NO 3) 2·3H 2O | Mg(NO 3) 2·7H 2O | Al(NO 3) 3 | NH 4NO 3 | H 2O |
| Weight (kg) | 6 | 3 | 6 | 4 | 13 | 68 |
| Weight percent (%) | 6 | 3 | 6 | 4 | 13 | 68 |
The using method of sulfur-fixing type 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 60,000 of fuel quantity/.
Use above-mentioned decoking agent, decoking is effective, and sulfur-fixing rate is 25%.
Embodiment 2
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
| Component | KNO 3 | Cu(NO 3) 2·3H 2O | Mg(NO 3) 2·7H 2O | Al(NO 3) 3 | NH 4NO 3 | H 2O |
| Weight (kg) | 7 | 2 | 5 | 3 | 11 | 72 |
| Weight percent (%) | 7 | 2 | 5 | 3 | 11 | 72 |
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/, decoking is effective, sulfur-fixing rate is 30%.
Embodiment 3
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
| Component | KNO 3 | Cu(NO 3) 2·3H 2O | Mg(NO 3) 2·7H 2O | Al(NO 3) 3 | NH 4NO 3 | H 2O |
| Weight (kg) | 8 | 3.5 | 4 | 2 | 10 | 72.5 |
| Weight percent (%) | 8 | 3.5 | 4 | 2 | 10 | 72.5 |
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, sulfur-fixing rate is 34%.
Embodiment 4
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
| Component | KNO 3 | Cu(NO 3) 2·3H 2O | Mg(NO 3) 2·7H 2O | Al(NO 3) 3 | NH 4NO 3 | H 2O |
| Weight (kg) | 9 | 1 | 3 | 5 | 15 | 67 |
| Weight percent (%) | 9 | 1 | 3 | 5 | 15 | 67 |
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/, decoking is effective, sulfur-fixing rate is 20%.
Embodiment 5
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
| Component | KNO 3 | Cu(NO 3) 2·3H 2O | Mg(NO 3) 2·7H 2O | Al(NO 3) 3 | NH 4NO 3 | H 2O |
| Weight (kg) | 10 | 1.5 | 2 | 3.5 | 14 | 69 |
| Weight percent (%) | 10 | 1.5 | 2 | 3.5 | 14 | 69 |
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, sulfur-fixing rate is 28%.
Embodiment 6
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
| Component | KNO 3 | Cu(NO 3) 2·3H 2O | Mg(NO 3) 2·7H 2O | Al(NO 3) 3 | NH 4NO 3 | H 2O |
| Weight (kg) | 8.5 | 2.5 | 2.5 | 4.5 | 12 | 70 |
| Weight percent (%) | 8.5 | 2.5 | 2.5 | 4.5 | 12 | 70 |
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/, decoking is effective, sulfur-fixing rate is 32%.
Embodiment 7
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
| Component | KNO 3 | Cu(NO 3) 2·3H 2O | Mg(NO 3) 2·7H 2O | Al(NO 3) 3 | NH 4NO 3 | H 2O |
| Weight (kg) | 8 | 2.8 | 4.5 | 5 | 12 | 67.7 |
| Weight percent (%) | 8 | 2.8 | 4.5 | 5 | 12 | 67.7 |
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/, decoking is effective, sulfur-fixing rate is 35%.
Embodiment 8
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
| Component | KNO 3 | Cu(NO 3) 2·3H 2O | Mg(NO 3) 2·7H 2O | Al(NO 3) 3 | NH 4NO 3 | H 2O |
| Weight (kg) | 10 | 2 | 3.2 | 4.5 | 11 | 69.3 |
| Weight percent (%) | 10 | 2 | 3.2 | 4.5 | 11 | 69.3 |
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 100,000 of fuel quantity/, decoking is effective, sulfur-fixing rate is 40%.
Embodiment 9
The component of decoking agent and the weight percent of each component are:
(gross weight is 100Kg)
| Component | KNO 3 | Cu(NO 3) 2·3H 2O | Mg(NO 3) 2·7H 2O | Al(NO 3) 3 | NH 4NO 3 | H 2O |
| Weight (kg) | 9.5 | 3.5 | 6 | 4.8 | 10 | 66.2 |
| Weight percent (%) | 9.5 | 3.5 | 6 | 4.8 | 10 | 66.2 |
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, sulfur-fixing rate is 38%.
Claims (2)
1. a sulfur-fixing type liquid coke inhibitor, is characterized in that, the component of described decoking agent and the weight percent of each component are:
KNO
3：6-10%；
Cu(NO
3)
2·3H
2O：1-3.5%；
Mg(NO
3)
2·7H
2O：2-6%；
Al(NO
3)
3·9H
2O：2-5%；
NH
4NO
3：10-15%；
H
2O: surplus.
2. sulfur-fixing 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
3：8-10%；
Cu(NO
3)
2·3H
2O：2-3.5%；
Mg(NO
3)
2·7H
2O：3-6%；
Al(NO
3)
3·9H
2O：4-5%；
NH
4NO
3：10-12%；
H
2O: surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101402493A CN103387862A (en) | 2012-05-08 | 2012-05-08 | Sulfur-fixing liquid-state decoking agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101402493A CN103387862A (en) | 2012-05-08 | 2012-05-08 | Sulfur-fixing liquid-state decoking agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103387862A true CN103387862A (en) | 2013-11-13 |
Family
ID=49532285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101402493A Pending CN103387862A (en) | 2012-05-08 | 2012-05-08 | Sulfur-fixing liquid-state decoking agent |
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| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104312656A (en) * | 2014-07-25 | 2015-01-28 | 王天云 | A decoking coal-saving agent and a using method thereof |
| CN106479597A (en) * | 2016-11-28 | 2017-03-08 | 威海翔宇环保科技股份有限公司 | A kind of biomass boiler coke-removing agent and preparation method thereof |
Citations (5)
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|---|---|---|---|---|
| CN1093741A (en) * | 1994-03-02 | 1994-10-19 | 刘冠中 | High-efficient combustion-supporting coke-knocking descaling additive for combustion furnace |
| CN1127776A (en) * | 1995-01-28 | 1996-07-31 | 西安正阳环保能源有限公司 | Sulfur-immobilizing coal-saving additive |
| CN1487262A (en) * | 2003-06-27 | 2004-04-07 | 琦 戴 | Boiler coke eliminating agent |
| CN101230302A (en) * | 2008-01-07 | 2008-07-30 | 陕西亿利莱电力发展有限责任公司 | Coal-saving desulfurization additive for power plant boiler |
| CN101302456A (en) * | 2007-07-30 | 2008-11-12 | 陈睿红 | Highly effective coal combustion improver and preparation thereof |
-
2012
- 2012-05-08 CN CN2012101402493A patent/CN103387862A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093741A (en) * | 1994-03-02 | 1994-10-19 | 刘冠中 | High-efficient combustion-supporting coke-knocking descaling additive for combustion furnace |
| CN1127776A (en) * | 1995-01-28 | 1996-07-31 | 西安正阳环保能源有限公司 | Sulfur-immobilizing coal-saving additive |
| CN1487262A (en) * | 2003-06-27 | 2004-04-07 | 琦 戴 | Boiler coke eliminating agent |
| CN101302456A (en) * | 2007-07-30 | 2008-11-12 | 陈睿红 | Highly effective coal combustion improver and preparation thereof |
| CN101230302A (en) * | 2008-01-07 | 2008-07-30 | 陕西亿利莱电力发展有限责任公司 | Coal-saving desulfurization additive for power plant boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104312656A (en) * | 2014-07-25 | 2015-01-28 | 王天云 | A decoking coal-saving agent and a using method thereof |
| CN106479597A (en) * | 2016-11-28 | 2017-03-08 | 威海翔宇环保科技股份有限公司 | A kind of biomass boiler coke-removing agent and preparation method thereof |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Sheng Tong Industrial Park No. 109 Venus Road 410200 in Hunan province Changsha District of Wangcheng City Applicant after: Suntown Technology Group Corporation Address before: Sheng Tong Industrial Park No. 109 Venus Road 410200 in Hunan province Changsha District of Wangcheng City Applicant before: Hunan Shengtong Technology Group Co., Ltd. |
|
| COR | Change of bibliographic data | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131113 |