CN109439380A - Improve the high heating value additive and preparation method thereof of coal combustion efficiency - Google Patents
Improve the high heating value additive and preparation method thereof of coal combustion efficiency Download PDFInfo
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- CN109439380A CN109439380A CN201811630886.2A CN201811630886A CN109439380A CN 109439380 A CN109439380 A CN 109439380A CN 201811630886 A CN201811630886 A CN 201811630886A CN 109439380 A CN109439380 A CN 109439380A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
- C10L9/12—Oxidation means, e.g. oxygen-generating compounds
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- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The present invention relates to coal additive technical fields, and in particular to a kind of high heating value additive and preparation method thereof for improving coal combustion efficiency.The high heating value additive of the present invention for improving coal combustion efficiency, the raw material including following mass fraction: 8-12 parts of needle coke, 20-30 parts of coal tar, 40-50 parts of dimethylbenzene, 8-12 parts of alcohols；2-5 parts of carbide slag, 2-5 parts of scum, 1-2 parts of nitrate, 0.5-1 parts of manganese compound, 100 parts of water.The additive improves burning of coal temperature, to reduce the blackness of smoke evacuation, and reduces SO when in use by reducing the activation energy of oxidation of coal reaction2、NOXDischarge amount, achieve the purpose that cleaning burning, moreover it is possible to by physical-chemical reaction, and make that the cinder in furnace is loose voluntarily to fall off, achieve the effect that solid sulphur, denitration, increase combustion, slagging-off；The present invention also provides preparation methods.
Description
Technical field
The present invention relates to coal additive technical fields, and in particular to a kind of high heating value addition for improving coal combustion efficiency
Agent and preparation method thereof.
Background technique
For China's energy based on coal, it is each that coal is widely used in cement plant, thermal power plant, Bricks and Tiles Plant, steel mill, restaurant etc.
A industry, coal make in burning conversion thermal energy, still containing certain unburned residue, the burning of coal in the cinder of generation
Quality fails to reach due effect, and efficiency of combustion is lower, and coal burning can generate a large amount of pollutant, as soot dust,
SO2、NOXDeng 80% burning from coal of the source of atmospheric pollution.
In recent years, coal additive has become a hot topic of research, and coal additive has the characteristics that environmental protection, energy conservation, Ke Yigai
Become existing encephalic combustion zone situation, increase flame height and density, to reach vibrating type burning, accelerates thermal energy exchange, compel
So that carbon granules and carbon monoxide, at carbon dioxide and water, is reached completely burned in high-temperature region umklappen, keep clinker loose, it is less or
Eliminate coking.
A kind of coal additive is disclosed in patent CN200610032354.X, by desulfurizing agent, leavening agent, combustion adjuvant, is disappeared
Fumicants and corrosion inhibiter form, and CaO, NH are contained in desulfurizing agent4HCO3、ZnO、SiO2Ingredient；Contain NaHCO in leavening agent3、KAl
(SO4)2·12H2O, it is acidified gangue ingredient；Contain Fe in combustion adjuvant2O3, MgO, KCl ingredient；Corrosion inhibiter is humic acid；KMnO4
It is also combustion adjuvant for antismoke agent；NaNO3It is also corrosion inhibiter for combustion adjuvant；The invention is suitable for Industrial Boiler, power station furnace, steam
Furnace and cellar furnace etc. is coal-fired and life moulded coal, directly mixes with coal, easy to use, and desulfurization degree is up to 85%, feast-brand mark coal rate
14.77%, boiler thermal efficiency 9.19% is improved, boiler slag carbon content reduces by 14.86%, and coke cleaning, smoke elimination, inhibition are up to 90% or more.
But solid additives are easy to produce secondary pollution in burning, and it is bad to the infiltration and diffusivity of coal, in the fill process of coal
In be easy to fall off, be layered, energy-saving efficiency it is lower.
Disclosed in patent CN201210044313.8 it is a kind of can improve simultaneously coal combustion efficiency and reduce NOXDischarge amount
Additive, the butyl titanate of the MMT including 0.01-0.lwt%, 0.005-0.02wt%, the second of 0.005-0.02wt%
Acyl acetone iron, the sulfonate type anionic surfactant of 0.1-0.5wt%, the dimethylbenzene and/or diesel oil of 0.1-lwt% and
Excess water；Evenly dispersed cheap big times of amount dilute aqueous solution agent is made, solves ppm grades of practical application micro addition effective ingredients
MMT dispersing uniformity on coal particle, and butyl titanate and ferric acetyl acetonade are added simultaneously, synergistic effect further improves
Catalytic effect of MMT during coal burning；Be added with coal with 1%-2wt%, can reduce flying dust carbon content 26%~
67%, reduce NOx discharge capacity 30%-48%.The invention improves dispersing uniformity of the additive in coal, but its mainly for
Promote coal combustion efficiency and denitration to be studied, is not related in terms of the decoking of coal burning and desulfurization.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of high heating value additions for improving coal combustion efficiency
Agent improves burning of coal temperature, and make the suspension in coal and burner hearth when in use by reducing the activation energy of oxidation of coal reaction
Carbon granule full combustion to reduce the blackness of smoke evacuation, and reduces SO2、NOXDischarge amount, achieve the purpose that cleaning burning, moreover it is possible to logical
Physical-chemical reaction is crossed, and makes that the cinder in furnace is loose voluntarily to fall off, achievees the effect that solid sulphur, denitration, increase combustion, slagging-off；This hair
It is bright that preparation method is also provided.
The high heating value additive of the present invention for improving coal combustion efficiency, the raw material including following mass fraction:
Alcohols is the mixture of methanol or ethyl alcohol or both.
Needle coke is oil system needle coke.
Dimethylbenzene is that three kinds of ortho-xylene of the meta-xylene of 45-70%, the paraxylene of 15-25% and 10-15% are different
Mixture composed by structure body.
Manganese compound is KMnO4Or MnO2Or both mixture.
The main component of carbide slag is Ca (OH)2。
The main component of scum is Fe3O4、CaO、SiO2、Al2O3And MgO.
Nitrate is one or more of ammonium nitrate, sodium nitrate, potassium nitrate, magnesium nitrate, calcium nitrate, aluminum nitrate
Mixture.
The preparation method of the high heating value additive of the present invention for improving coal combustion efficiency, steps are as follows:
Needle coke, carbide slag, scum, nitrate and manganese compound are mixed, crushes, adds coal tar, alcohols, diformazan
Benzene and water mix to get the high heating value additive of coal combustion efficiency is improved.
When in use, 50-100 tons of additives are added in 1000 tons of coals, stir evenly, stand 15-30min
It comes into operation.After the addition of the additives, coal is energetic and violent, in order to make full use of the thermal energy of its very hot oven, it is desirable that is guaranteeing to make
In the case where, suitably slow down fire grate walking speed (generally slowing down one grade of walking speed)；And coal burning is abundant, needs more oxygen
Gas according to circumstances suitably should adjust the speed the blow rate required, and coal seam thickness should optionally be thinned.
The calorific value of needle coke, coal tar and alcohols is higher, is added in coal as additive, makes the heat of coal mixture
Value is higher than raw coal charcoal, and when burning can discharge more heats；In addition, coal tar and alcohols can be used as dispersing agent, on the one hand
So that solid component is uniformly dispersed in coal, it is more abundant to guarantee that each component is contacted with coal, to farthest play product
Combustion-supporting, solid sulphur, denitration, decoking performance can be soon in coal on the other hand when its is mixed with water is sprayed on fire coal
Disperse between particle, adsorb coal-burning particle mutually, increase new burning point, expands coal-fired combustion zone.
The oxide of alkali metal and transition metal in scum can be used as the catalyst of coal burning, on the one hand reduce
The point of origin temperature of coal, enhances coal-fired redox reaction, and catalyst gradually releases nascent state in different temperature zones and lives
Property oxygen, in conjunction with the combustible in coal, reduce reaction activity, promote burning, improve operating condition and reduce pollutant emission, make coal
Charcoal burning is more abundant；On the other hand the combustion activity that can increase coal, quickly allows macromolecular carbochain to crack, while benefit
Hydrogen atom is provided with the moisture in coal, hydrogenation process is completed, generates the hydrocarbon of more low molecular weight or small-molecular-weight, make
Coal hydrogen content and high-low position calorific value improve 8~10%.And scum and its nitrate and manganese compound are used in combination, it can be with
Increase flame intensity and height, reach vibrating type burning, expand combustion zone, increase the heat transfer area of heat exchange, improves heat and hand over
Change efficiency；Also make that the quality of carbon slag is loose, lightens, to effectively improve slagging problem；Meanwhile manganese compound is with good
Good denitration, can reduce NOXDischarge amount, achieve the purpose that cleaning burning,
Ca (OH) in carbide slag2It is able to suppress the decomposition of sulphur compound, while dimethylbenzene is fine to the dissolubility of sulphur, with
Carbide slag acts synergistically, and can absorb the sulfur dioxide with generation during curing combustion, and largely adsorbs dust and other nocuousness
Substance, while the flue dust incrustation and jelly of burner inner wall attachment are also removed, to inhibit smoke emissioning concentration.
Compared with prior art, the invention has the following beneficial effects:
(1) additive of the invention makes the combustion system of traditional coal from outward appearance to inner essence change into an inside and outside combust, mentions
The high after-flame degree of coal burning, reduces the heat that chemically incomplete combustion and mechanical incomplete combustion coal-fired in furnace are taken away
Loss, comprehensive coal saving rate are stablized 25% or more；
(2) additive of the invention recycles carbide slag and scum, acts synergistically with other components, reduces exhaust gas
The discharge amount of middle flue dust and pernicious gas economizes on coal to reach good, solid sulphur, denitration, devokes effect；
(3) additive of the invention is nontoxic, nonflammable, non-explosive, pH value is close neutral, corrosion-free to boiler, long
Phase storage is never degenerated, and the good dispersion in coal, easy to use in the readily permeable gap to coal.
Specific embodiment
The present invention will be further described with reference to embodiments, but protection scope of the present invention is not limited only to this.
Embodiment 1
By 8 parts of needle cokes, 2 parts of carbide slags, 5 parts of scums, 1 part of sodium nitrate and 1 part of KMnO4Mixing crushes, adds 8 parts
Methanol, 30 parts of coal tar, 40 parts of dimethylbenzene and 100 parts of water mix to get the high heating value additive of coal combustion efficiency is improved.
When in use, 50 tons of additives are added in 1000 tons of coals, stir evenly, stand 15min, can put into makes
With.
Embodiment 2
By 12 parts of needle cokes, 5 parts of carbide slags, 2 parts of scums, 1.5 parts of potassium nitrate and 0.8 part of KMnO4Mixing crushes, then plus
Enter 12 parts of ethyl alcohol, 20 parts of coal tar, 50 parts of dimethylbenzene and 100 parts of water, mixes the high heating value to get coal combustion efficiency is improved and add
Add agent.
When in use, 60 tons of additives are added in 1000 tons of coals, stir evenly, stand 20min, can put into makes
With.
Embodiment 3
By 8 parts of needle cokes, 0.6 part of carbide slag, 0.7 part of scum, 1 part of aluminum nitrate, 0.5 part of calcium nitrate and 0.8 part of MnO2It is mixed
Close, crush, then plus 5 parts of methanol, 5 parts of ethyl alcohol, 28 parts of coal tar, 42 parts of dimethylbenzene and 100 parts of water, mixing to get improve coal
The high heating value additive of efficiency of combustion.
When in use, 70 tons of additives are added in 1000 tons of coals, stir evenly, stand 25min, can put into makes
With.
Embodiment 4
By 10 parts of needle cokes, 3 parts of carbide slags, 4 parts of scums, 0.5 part of ammonium nitrate, 0.5 part of magnesium nitrate, 0.5 part of calcium nitrate and
0.5 part of MnO2；0.5 part of KMnO4Mixing, crush, then plus 12 parts of methanol, 20 parts of coal tar, 45 parts of dimethylbenzene and 100 parts of water, mix
It closes to get the high heating value additive of coal combustion efficiency is improved.
When in use, 85 tons of additives are added in 1000 tons of coals, stir evenly, stand 30min, can put into makes
With.
Embodiment 5
By 9 parts of needle cokes, 4 parts of carbide slags, 3 parts of scums, 1 part of aluminum nitrate, 1 part of calcium nitrate and 0.5 part of KMnO4Mixing, powder
It is broken, then plus 10 parts of ethyl alcohol, 28 parts of coal tar, 42 parts of dimethylbenzene and 100 parts of water, mix to get improve coal combustion efficiency height
Calorific value additive.
When in use, 100 tons of additives are added in 1000 tons of coals, stir evenly, stand 30min, can put into makes
With.
The properties of product and combustion case of embodiment 1-5 are tested, test result is as shown in table 1.
The properties of product and combustion case test result of 1 embodiment 1-5 of table
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Additive pH value | 6.8 | 6.9 | 6.9 | 6.6 | 6.8 |
| The thermal efficiency improves (%) | 20.9 | 22.5 | 23.3 | 25.7 | 26.8 |
| Coal saving rate (%) | 25.2 | 25.8 | 26.4 | 26.8 | 27.0 |
| Flue gas lingemann blackness | < 1 | < 1 | < 1 | < 1 | < 1 |
| It reduces CO (%) | 53.2 | 54.2 | 54.7 | 56.6 | 56.8 |
| Denitration efficiency (%) | 43.2 | 43.9 | 45.4 | 47.2 | 47.3 |
| Sulfur-fixing rate (%) | 76.7 | 79.3 | 82.2 | 85.2 | 85.5 |
| It reduces flying dust (%) | 38.2 | 39.5 | 40.8 | 42.1 | 42.2 |
| The slag removal period (day) | 15 | 15 | 15 | 15 | 15 |
As can be seen from the table, additive pH value of the invention, at neutrality, will not cause acid and alkali corrosion to boiler close to 7；
After the additive is added in coal, the thermal efficiency of coal mixture is significantly improved, and with the increase of additive amount, thermal effect
Rate promotion is higher, in addition, the noxious gas emission of coal is significantly less, slagging situation also has clear improvement, and synthesis is economized on coal
Rate reaches 25% or more.
Claims (9)
1. a kind of high heating value additive for improving coal combustion efficiency, it is characterised in that: the raw material including following mass fraction:
2. the high heating value additive according to claim 1 for improving coal combustion efficiency, it is characterised in that: alcohols is methanol
Or the mixture of ethyl alcohol or both.
3. the high heating value additive according to claim 1 for improving coal combustion efficiency, it is characterised in that: needle coke is oil
It is needle coke.
4. the high heating value additive according to claim 1 for improving coal combustion efficiency, it is characterised in that: dimethylbenzene is
Mixture composed by three kinds of meta-xylene of 45-70%, the paraxylene of 15-25% and 10-15% ortho-xylene isomers.
5. the high heating value additive according to claim 1 for improving coal combustion efficiency, it is characterised in that: manganese compound is
KMnO4Or MnO2Or both mixture.
6. the high heating value additive according to claim 1 for improving coal combustion efficiency, it is characterised in that: the master of carbide slag
Wanting ingredient is Ca (OH)2。
7. it is according to claim 1 improve coal combustion efficiency high heating value additive, it is characterised in that: scum it is main
Ingredient is Fe3O4、CaO、SiO2、Al2O3And MgO.
8. the high heating value additive according to claim 1 for improving coal combustion efficiency, it is characterised in that: nitrate is nitre
The mixture of one or more of sour ammonium, sodium nitrate, potassium nitrate, magnesium nitrate, calcium nitrate, aluminum nitrate.
9. a kind of preparation method of the described in any item high heating value additives for improving coal combustion efficiency of claim 1-8,
Be characterized in that: steps are as follows:
By needle coke, carbide slag, scum, nitrate and manganese compound mix, crush, add coal tar, alcohols, dimethylbenzene and
Water mixes to get the high heating value additive of coal combustion efficiency is improved.
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| CN201811630886.2A CN109439380A (en) | 2018-12-29 | 2018-12-29 | Improve the high heating value additive and preparation method thereof of coal combustion efficiency |
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| CN201811630886.2A CN109439380A (en) | 2018-12-29 | 2018-12-29 | Improve the high heating value additive and preparation method thereof of coal combustion efficiency |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111944572A (en) * | 2020-08-25 | 2020-11-17 | 中天恒合(天津)国际贸易有限公司 | Chemical product coal blending formula |
| CN112403524A (en) * | 2020-11-20 | 2021-02-26 | 雷夫·维本斯塔德 | Combustion catalyst |
-
2018
- 2018-12-29 CN CN201811630886.2A patent/CN109439380A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111944572A (en) * | 2020-08-25 | 2020-11-17 | 中天恒合(天津)国际贸易有限公司 | Chemical product coal blending formula |
| CN112403524A (en) * | 2020-11-20 | 2021-02-26 | 雷夫·维本斯塔德 | Combustion catalyst |
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