CN101440322A - Efficient reburning denitration mixed fuel made from solid wastes and preparation thereof - Google Patents
Efficient reburning denitration mixed fuel made from solid wastes and preparation thereof Download PDFInfo
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- CN101440322A CN101440322A CNA2008102072371A CN200810207237A CN101440322A CN 101440322 A CN101440322 A CN 101440322A CN A2008102072371 A CNA2008102072371 A CN A2008102072371A CN 200810207237 A CN200810207237 A CN 200810207237A CN 101440322 A CN101440322 A CN 101440322A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The invention relates to a solid waste high-efficiency reburning denitration blended fuel and a method for preparing the same. The blended fuel comprises main fuel of used tire rubber powder, various biomass waste materials, power plant brown coal ash, biomass ash, biomass minerals, and iron oxide (Fe2O3) which are matched at appropriate parameters to be used as reburning fuels. The blended fuel can eliminate as high as more than 80 percent of nitrogen oxides (NOX) generated in the process of coal burning to convert the nitrogen oxides into nitrogen so as to achieve the aim of reducing the emission of nitrogen oxide pollutants, and the solid waste energy sources are recycled effectively and simultaneously.
Description
Technical field
The invention belongs to the reburning fuel field, particularly relate to a kind of solid waste efficient reburning denitration mixed fuel made and preparation.
Background technology
Oxynitride (NOX) is a kind of important pollution gas that coal combustion process generates, and enters and causes atmospheric severe contamination in the atmosphere.China is to be the country of main primary energy source with coal, NO
XEmission control to keeping the high-quality atmospheric environment of China very important.Along with the increase of rapid economic development to electricity needs, China coal firing boiler NO
XTotal emission volumn in continuous increase.For thermoelectricity SO
2Discharging China begun to control effectively, but for flue gas NO
XEmission control still be in the starting stage.The NO of China's unit generated energy in 2002
XEmission level is much higher than the emission level of developed countries such as the U.S., Japan, Germany.The present some areas of China, as Guangdong, the acid rain type has begun from sulfuric acid type to the compound transformation of sulfuric acid nitric acid.This explanation is as the control NO that do not adopt vigorous measures
XDischarging, the achievement that obtains of China's desulfurization will be by NO so
XReduction.
Coal mainly is to generate fuel type NO in combustion processes
X, control fuel type NO
XMethod can be classified as two big classes: the one, by changing the combustion conditions of coal or other fuel, thereby reduce fuel type NO
XGrowing amount, i.e. NO in the combustion processes
XRemove, comprise air classifying burning, fuel-staged combustion (also cry again and fire) and various types of low NO
XBurner etc.; The 2nd, to the NO of the back generation of burning
XRemoved before flue gas enters atmosphere, promptly gas denitrifying technology comprises technology such as SCR, SNCR.SCR gas denitrifying technology removal efficiency can be very high, but it consumes a large amount of NH
3, catalyzer etc. and need certain space mounting relevant devices, cost is very high.Combustion technology is a kind of denitration technology of effectively stove combustion process again.Under rational condition, can reach well total denitration efficiency.Cost when combustion is applied to the old boiler transformation again is than gas denitrifying technology, and is as SCR, more economical.
Combustion technology is sent into burner to the part of fuel in the downstream in primary combustion zone again, the NO that the primary combustion zone has generated
XThe fugitive constituent that is discharged by reburning fuel under the rich fuel condition of reburning zone (mainly being hydro carbons) is reduced to N
2In nearly in the past 30 years, the result of study of laboratory small test platform and the The actual running results of large-sized boiler all show, no matter are the combustions again of coal or Sweet natural gas, can only remove the NO that about primary combustion zone of about 60% generates at most
XIn the denitration by refueling process of Sweet natural gas, the hydrocarbon free radical can be converted into N to NO effectively
2, also generate HCN and NH simultaneously
3Two kinds of most important intermediate products that fire again.HCN/NH
3Be oxidized to NO again at burnt zone, therefore limited the raising of denitration by refueling efficient.And in the coal powder recombustion, the hydro carbons fugitive constituent that coal discharges generates intermediate product HCN/NH when firing reductive NO more equally
3In addition, the nitrogen in the coal tar is at the also further oxidized generation NO of burnt zone.Therefore, intermediate product HCN/NH is fired in control more effectively
3And the reoxidation of controlling burnt nitrogen C (N) is to improve the critical path that fires total efficiency again.
At present, the international coverage reburning fuel that combustion technology adopted again is generally Sweet natural gas and low-rank coal.The denitration by refueling effect of Sweet natural gas is fine, but it is higher to consider that its price of economic factors compares, and is difficult to reach the inside of reaction zone in large-scale burner hearth.The low-rank coal that bituminous coal, brown coal etc. contain high-volatile is done reburning fuel, and the denitration effect and the Sweet natural gas of the section of combustion is approaching again, and the high-order coal is low because of its volatile content, and it is relatively poor to fire effect again.The secondary oxidation of coal tar nitrogen has also limited the further raising of coal dust denitration by refueling efficient.In addition, different biomass fuel and biogas also all have certain denitration by refueling effect.
Combustion technology is the denitration in the stove technology again, and the NO that in the burning of coal process primary combustion zone is generated effectively is reduced to N
2, it implements convenient and economical.With the outer denitration technology of stove, promptly gas denitrifying technology is compared as SCR, and combustion technology does not need to account for the place that the SCR device is installed in addition again, invest for a short time, and the day-to-day operation expense is low, and does not have problems such as ammonia leakage and corrosion.
Summary of the invention
Technical problem to be solved by this invention provides a kind of solid waste efficient reburning denitration mixed fuel made and preparation, damaged tire, biomass waste, lignite ash, biomass ash equal energy source recycling, final efficient surpasses 80%, is better than expensive natural gas reburning technology.
A kind of solid waste efficient reburning denitration mixed fuel made of the present invention,
Propellant combination 1 comprises: waste tyre rubber powder, lignite ash, and wherein waste tyre rubber powder is as main fuel, and lignite ash is as auxiliary catalyzer;
Propellant combination 2 comprises: waste tyre rubber powder, biomass ash and biomass mineral substance, and wherein waste tyre rubber powder is as main fuel, and biomass and biomass mineral substance are as auxiliary catalyzer;
Propellant combination 3 comprises: biomass waste (comprising paper mill mud, Cortex Pini, pine sawdust, cereal straw) is pulverized fuel, the ferric oxide (Fe that the back becomes
2O
3), wherein biomass waste is as main fuel, ferric oxide (Fe
2O
3) as auxiliary catalyzer;
Described ferric oxide (Fe
2O
3) iron rust that produces for Steel Plant or the material that is rich in ferric oxide.
The preparation of a kind of solid waste efficient reburning denitration mixed fuel made of the present invention comprises:
The preparation of propellant combination 1 is broken into rubber powder 100 orders-200 order with scrap tire powder, the flying dust that lignite ash is collected for power plant's sack cleaner, and uniform mixing makes;
The preparation of propellant combination 2 is broken into rubber powder 100 orders-200 order with scrap tire powder, and biomass combustion is obtained the biomass ash, the biomass mineral substance, and uniform mixing makes;
The preparation of propellant combination 3, biomass waste (comprising paper mill mud, Cortex Pini, pine sawdust, cereal straw) is pulverized fuel＜150um that the back becomes, ferric oxide, uniform mixing makes;
Propellant combination is used for removing in the coal firing boiler stove oxynitride (NO by re-burning mode
X).Combustion conditions is: the temperature and the stoichiometric ratio of combustion section again are 1250 ℃ and SR2=0.9, and the temperature of burning segment and stoichiometric ratio are 1150 ℃ and SR3=1.2.When the propellant combination that uses biomass waste fuel and ferric oxide to form,, import the water vapor of 6.35% (volume ratio) simultaneously with fuel for guaranteeing that at high temperature the katalysis of ferric oxide does not reduce.
The ultimate analysis of table 1 damaged tire, biomass waste (wt%, dry base)
The composition (wt%) of table 2 lignite ash, biomass ash and biomass mineral substance
| Na 2O | MgO | Al 2O 3 | SiO 2 | P 2O 5 | SO 3 | K 2O | CaO | TiO | MnO 2 | Fe 2O 3 | LOI | |
| Lignite ash 1 | 3.2 | 5.83 | 16.43 | 35.51 | 0.18 | 5.99 | 1.25 | 21.17 | 0.86 | 0.07 | 9.53 | 2.28 |
| Lignite ash 2 | 1.73 | 3.54 | 14.21 | 22.46 | <0.2 | 20.64 | 0.95 | 31.69 | 0.83 | 0.05 | 4.66 | 0.46 |
| The biomass ash | 0.4 | 0.82 | Lime carbonate 34.85 | Organonitrogen 0.11 | 0.62 | 0.41 | 1.74 | 15.27 | - | Mn 3O 40.12 | - | Fugitive constituent 45.77 |
Annotate: 1: sack cleaner is collected, and 2: electric precipitator is collected, and is designated as ESP
The technical analysis result of biomass ash (particle diameter is less than 150 μ m) is: fixed carbon 18.91%, fugitive constituent 11.11%, ash 69.98%, moisture content 13.22%.Is its surplus materials behind the burning cinder biomass mineral substance.
The stoichiometric ratio of reburning fuel, note is SR, the ratio of the required Sauerstoffatom of the Sauerstoffatom of effective supply and this fuel perfect combustion when SR is defined as fuel combustion, it has accurately reflected the situation of combustion processes oxygen supply, SR＜rich the fuel condition (Ran requirement again) of 1 expression oxygen deprivation, SR〉1 expression excess oxygen (burning requirement).This parameter of combustion section again is designated as SR2, and this parameter of burning segment is designated as SR3.In addition, when the propellant combination that uses biomass waste fuel and ferric oxide to form,, import the water vapor of 6.35% (volume ratio) simultaneously with fuel for guaranteeing that at high temperature the katalysis of ferric oxide does not reduce.This water vapour of 6.35% is typical coal water vapour content in the gas fume after burning in boiler.
Above-mentioned propellant combination is sent into the reburning zone of boiler by re-burning mode, work as SR2=0.9, SR3=1.2 fires and burns temperature and is respectively 1250 and 1150 ℃, Fe
2O
3Concentration be 4000ppm (by the atom number)) under the condition, the final NO removal efficiency of propellant combination of the present invention is up to more than 80%.
Beneficial effect
The present invention has made full use of iron rust (ferric oxide, the Fe that damaged tire, biomass waste, lignite ash, biomass ash, Steel Plant as solid waste produce
2O
3) etc. solid waste, they Energy resources utilizations, removed the oxynitride (NO of discharged from coal-fired boiler
X) etc. atmospheric polluting material, reach the purpose of energy-saving and emission-reduction.Final efficient of the present invention surpasses 80%, is better than expensive natural gas reburning technology, and the coal dust that uses considerably beyond present boiler of power plant combustion technology again.Therefore, the present invention helps iron rust (ferric oxide, the Fe of a large amount of Energy resources processing damaged tires, biomass waste, lignite ash, biomass ash, Steel Plant's generation
2O
3) etc. solid waste, save Sweet natural gas or coal dust simultaneously, reduce NO
XDisposal of pollutants.
Description of drawings
The denitration by refueling efficient experimental result of Fig. 1 waste tyre rubber powder, biomass waste and with the contrast of Sweet natural gas;
The combustion again of the propellant combination of compositions such as Fig. 2 waste tyre rubber powder and lignite ash and biomass ash, biomass mineral substance adds the efficient that burns two sections denitrations;
Two sections denitration results of the combustion again of Fig. 3 waste tyre rubber powder, biomass waste and ferric oxide propellant combination+burn.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
As shown in Figure 1, scrap tire powder and the biomass waste denitration characteristic test result under typical case's combustion condition again and with the same terms under the comparison of firing the result again of Sweet natural gas.The result shows firing the process scrap tire powder again to have the effect denitration by refueling the same with Sweet natural gas with biomass waste, can effectively transform NO, and the best stoichiometric ratio of combustion section again SR2 is 0.9～0.95.
Embodiment 2
As shown in Figure 2, the combustion again of the propellant combination 1 of composition such as waste tyre rubber powder and lignite ash add the efficient that burns two sections denitrations and with similarity condition under the comparison of denitration efficiency of Sweet natural gas.The result shows, typically again combustion add and burn two sections denitrification process, the efficient of Sweet natural gas is the same good under the denitration efficiency of waste tyre rubber powder and the collected lignite ash of sack cleaner and the similarity condition, surpasses 80%.
Embodiment 3
As shown in Figure 2, the combustion again of the propellant combination 2 of composition such as waste tyre rubber powder and biomass ash, biomass mineral substance adds the comparison of the denitration efficiency of Sweet natural gas under the efficient that burns two sections denitrations and the similarity condition.The result shows, typically again combustion add and burn two sections denitrification process, when the feed rate of biomass ash during less than 0.05g/min, the efficient of Sweet natural gas is the same good under the denitration efficiency of waste tyre rubber powder and the propellant combination of forming with the biomass ash and the similarity condition, surpasses 70%.。
Embodiment 4
As shown in Figure 3, different biomass wastes and ferric oxide propellant combination 3 fire again+burn two sections denitration experimental results and with the contrast of Sweet natural gas.The result shows that the efficient that finally removes NO of the propellant combination of being made up of cereal straw and ferric oxide among the present invention is higher than the removal efficiency of Sweet natural gas under the similarity condition, is up to 81%.The removal efficiency that the propellant combination of being made up of paper mill mud and ferric oxide finally removes Sweet natural gas under the efficient of NO and the similarity condition is suitable, surpasses 70%.And the efficient that finally removes NO of the propellant combination of being made up of damaged tire and ferric oxide reaches 88%, is higher than the removal efficiency of Sweet natural gas under the similarity condition.
Claims (4)
1. solid waste efficient reburning denitration mixed fuel made,
Waste tyre rubber powder (〉 90%), lignite ash (0～10%) propellant combination 1 comprises:, wherein waste tyre rubber powder is as main fuel, and lignite ash is as auxiliary catalyzer;
Waste tyre rubber powder (〉 90%), biomass ash (0～10%) or biomass mineral substance (0～10%) propellant combination 2 comprises:, wherein waste tyre rubber powder is as main fuel, and biomass and biomass mineral substance are as auxiliary catalyzer;
Propellant combination 3 comprises: biomass waste is pulverized the fuel (〉 90% that the back becomes), ferric oxide Fe
2O
3(0～10%), wherein biomass waste is as main fuel, ferric oxide Fe
2O
3As auxiliary catalyzer;
2. a kind of solid waste efficient reburning denitration mixed fuel made according to claim 1 is characterized in that: described biomass waste is a paper mill mud, Cortex Pini, pine sawdust or cereal straw.
3. a kind of solid waste efficient reburning denitration mixed fuel made according to claim 1 is characterized in that: described ferric oxide Fe
2O
3Iron rust that produces for Steel Plant or the material that is rich in ferric oxide.
4. the preparation of a solid waste efficient reburning denitration mixed fuel made comprises:
The preparation of propellant combination 1 is broken into rubber powder 100 orders-200 order with scrap tire powder, the flying dust that lignite ash is collected for power plant's sack cleaner, and uniform mixing makes;
The preparation of propellant combination 2 is broken into rubber powder 100 orders-200 order with scrap tire powder, and biomass combustion is obtained the biomass ash, the biomass mineral substance, and uniform mixing makes;
The preparation of propellant combination 3, biomass waste is pulverized fuel＜150um that the back becomes, ferric oxide, uniform mixing makes; 5. the preparation of a kind of solid waste efficient reburning denitration mixed fuel made according to claim 4 is characterized in that: propellant combination is used for removing in the coal firing boiler stove oxynitride NO by re-burning mode
x
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102072371A CN101440322A (en) | 2008-12-18 | 2008-12-18 | Efficient reburning denitration mixed fuel made from solid wastes and preparation thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102072371A CN101440322A (en) | 2008-12-18 | 2008-12-18 | Efficient reburning denitration mixed fuel made from solid wastes and preparation thereof |
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| CN101440322A true CN101440322A (en) | 2009-05-27 |
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ID=40724935
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103289775A (en) * | 2013-06-28 | 2013-09-11 | 广西大学 | Fuel composition for re-combustion denitration in coal-fired boiler in cane sugar factory |
| CN104830397A (en) * | 2015-05-21 | 2015-08-12 | 刘冬明 | Compound high-temperature environment-friendly biomass fuel and preparation method thereof |
| CN104946339A (en) * | 2015-05-27 | 2015-09-30 | 上海理工大学 | Method for controlling biomass combustion NO by using nano iron-base additive |
| CN108148607A (en) * | 2018-02-02 | 2018-06-12 | 和县伊迈炭业有限责任公司 | A kind of smokeless charcoal for heating |
| CN108179049A (en) * | 2018-02-02 | 2018-06-19 | 和县伊迈炭业有限责任公司 | A kind of health charcoal for heating of house |
| CN108896430A (en) * | 2018-07-04 | 2018-11-27 | 中国矿业大学 | A kind of re-ignition anticipation test method that coal-field fire is administered |
| CN109370697A (en) * | 2018-11-30 | 2019-02-22 | 彭翔 | A kind of biomass fuel preparation method for material |
| CN109504485A (en) * | 2018-11-07 | 2019-03-22 | 辽宁大唐国际阜新煤制天然气有限责任公司 | Utilize the solid fuel and its preparation method and application of sewage plant sludge preparation |
-
2008
- 2008-12-18 CN CNA2008102072371A patent/CN101440322A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103289775A (en) * | 2013-06-28 | 2013-09-11 | 广西大学 | Fuel composition for re-combustion denitration in coal-fired boiler in cane sugar factory |
| CN104830397A (en) * | 2015-05-21 | 2015-08-12 | 刘冬明 | Compound high-temperature environment-friendly biomass fuel and preparation method thereof |
| CN104830397B (en) * | 2015-05-21 | 2017-03-29 | 黑龙江天顶能源科技有限公司 | A kind of compound high-temperature environmental-protection biomass fuel and preparation method thereof |
| CN104946339A (en) * | 2015-05-27 | 2015-09-30 | 上海理工大学 | Method for controlling biomass combustion NO by using nano iron-base additive |
| CN108148607A (en) * | 2018-02-02 | 2018-06-12 | 和县伊迈炭业有限责任公司 | A kind of smokeless charcoal for heating |
| CN108179049A (en) * | 2018-02-02 | 2018-06-19 | 和县伊迈炭业有限责任公司 | A kind of health charcoal for heating of house |
| CN108148607B (en) * | 2018-02-02 | 2020-07-31 | 和县伊迈炭业有限责任公司 | Smokeless charcoal for heating |
| CN108179049B (en) * | 2018-02-02 | 2020-07-31 | 和县伊迈炭业有限责任公司 | Health-care charcoal for indoor heating |
| CN108896430A (en) * | 2018-07-04 | 2018-11-27 | 中国矿业大学 | A kind of re-ignition anticipation test method that coal-field fire is administered |
| CN109504485A (en) * | 2018-11-07 | 2019-03-22 | 辽宁大唐国际阜新煤制天然气有限责任公司 | Utilize the solid fuel and its preparation method and application of sewage plant sludge preparation |
| CN109370697A (en) * | 2018-11-30 | 2019-02-22 | 彭翔 | A kind of biomass fuel preparation method for material |
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