CN106731638B - Aluminium ash is used for the processing method of factory smoke desulphurization denitration - Google Patents

Aluminium ash is used for the processing method of factory smoke desulphurization denitration Download PDF

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CN106731638B
CN106731638B CN201710104631.1A CN201710104631A CN106731638B CN 106731638 B CN106731638 B CN 106731638B CN 201710104631 A CN201710104631 A CN 201710104631A CN 106731638 B CN106731638 B CN 106731638B
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flue gas
aluminium
aluminium ash
desulphurization denitration
processing method
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CN106731638A (en
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倪红军
金宇阳
张福豹
胡妙关
朱昱
黄明宇
吕帅帅
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Nantong University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80—Semi-solid phase processes, i.e. by using slurries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

This application discloses the processing methods that a kind of aluminium ash is used for factory smoke desulphurization denitration, and aluminium ash is carried out broken polishing screening through crusher, obtains aluminium ashes；Aluminium ashes is put into reaction kettle, and water is added into reaction kettle, is mixed and generates ammonia and sediment slurry；Sediment slurry is emitted into denitrating flue gas tower, for flue gas by carrying out denitration process to flue gas in sediment slurry and collecting sediment, the flue gas across sediment slurry is remaining flue gas；By ammonia and remaining flue gas emission to fume desulfurizing tower, meets water and reacted, the solution fallen into fume desulfurizing tower is recycled, gas reaches discharge standard and discharged, and otherwise repeats.The application is reacted by using the flue gas of factory with aluminium ash, desulphurization denitration processing is carried out to flue gas, the pollution-free recycling of aluminium ash is realized, and the ammonia of long-term ignored generation is effectively recycled, has further improved the economic benefit of aluminium ash recycling.

Description

Aluminium ash is used for the processing method of factory smoke desulphurization denitration
Technical field
The present disclosure relates generally to the processing sides that aluminium ash recycling field more particularly to aluminium ash are used for factory smoke desulphurization denitration Method.
Background technique
Aluminium ash is electrolytic aluminium, and the waste generated in the aluminum smelting technologies processing composition such as aluminium processing melting aluminium again passes by aluminium The obtained secondary industry of recycling operation, the main component of aluminium ash has metallic aluminium, aluminium oxide, nitride, carbide and fluorination Object.The a large amount of waste aluminium ash waste material of the annual output in China, it is most of to be all stacked on plant area or carry out landfill disposal, not only The a large amount of waste of resource is caused, and aluminium scrap ash lighter weight, particle are thin, arbitrarily stacks and be easy at air and environment Pollution, simultaneously because aluminium ash reacts the pollution that the ammonia generated causes producing region air environment with water.Therefore, to the recycling of aluminium ash Using imperative.
With society and expanding economy, the regeneration research of resource has become the emphasis of research.2008 by state Chinese Ministry of Environmental Protection, family and Committee of Development and Reform's aluminium ash are included in " National Hazard waste register ", therefore by aluminium ash resource utilization, both can solve aluminium scrap Ash can make huge facilitation to the components utilising of social economic development and resource again to the pollution problem of environment.
In recent years, increasingly concern of the country to air quality, it is higher and higher to the quality requirement of the flue gas of plant emissions, Wherein the sulfur dioxide caused by fire coal and oxynitrides are the most serious to atmosphere pollution.The main technique of desulfurization at present has Gypsum, ammonia scrubbing, alkaline process, seawater method etc..Wherein have the advantages that no structure blocking using ammonia scrubbing, be swift in response. Preparing ammonia by aluminium ash can effectively recycle aluminium ash resource and the problem of factory smoke.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, a kind of aluminium ash is intended to provide for factory smoke desulphurization denitration Processing method.
On the one hand, the processing method that a kind of aluminium ash is used for factory smoke desulphurization denitration is provided, comprising steps of
S1: aluminium ash is crushed through crusher, is then polished with ball mill, the aluminium ash after polishing is on the vibrating It is sieved, obtains aluminium ashes；
S2: the aluminium ashes being put into reaction kettle, and water is added into reaction kettle, is mixed and is generated ammonia and precipitating Slurries；
S3: being emitted into denitrating flue gas tower for the sediment slurry, flue gas by the sediment slurry to the flue gas into Row denitration process simultaneously collects sediment, and the flue gas across the sediment slurry is remaining flue gas；
S4: it by the ammonia and remaining flue gas emission to fume desulfurizing tower, meets water and is reacted, taken off to the flue gas is fallen into Solution in sulphur tower is recycled, and the gas given off is detected, if reaching discharge standard, is discharged, is otherwise repeated S4。
According to technical solution provided by the embodiments of the present application, reacted by using the flue gas of factory with aluminium ash, to cigarette Gas carries out desulphurization denitration processing, realizes the pollution-free recycling of aluminium ash, and the ammonia of long-term ignored generation is carried out Effective recycling, has further improved the economic benefit of aluminium ash recycling, while avoiding pollution of the aluminium ash to environment.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other Feature, objects and advantages will become more apparent upon:
Fig. 1 is the processing method flow chart that aluminium ash is used for factory smoke desulphurization denitration in the present invention.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to Convenient for description, part relevant to invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to FIG. 1, the embodiment of the present invention provides the processing method that a kind of aluminium ash is used for factory smoke desulphurization denitration, including Step:
S1: aluminium ash is crushed through crusher, is then polished with ball mill, the aluminium ash after polishing is on the vibrating It is sieved, obtains aluminium ashes；
S2: the aluminium ashes being put into reaction kettle, and water is added into reaction kettle, is mixed and is generated ammonia and precipitating Slurries；
S3: being emitted into denitrating flue gas tower for the sediment slurry, flue gas by the sediment slurry to the flue gas into Row denitration process simultaneously collects sediment, and the flue gas across the sediment slurry is remaining flue gas；
S4: it by the ammonia and remaining flue gas emission to fume desulfurizing tower, meets water and is reacted, taken off to the flue gas is fallen into Solution in sulphur tower is recycled, and the gas given off is detected, if reaching discharge standard, is discharged, is otherwise repeated S4。
React with aluminium ash by the flue gas of factory in aluminium ash processing method provided in an embodiment of the present invention and carries out denitration Processing handles while generating sediment, and coal-fired primary product has dust, CO2、CO、SO2、NO、NO2, desulphurization denitration mainly removal Sulfur dioxide and oxynitrides, reaction equation is as follows,
AlN+3H20=Al (OH)3+NH3；
Obtained sediment may be recovered recycling, while generate ammonia, then by ammonia and flue gas emission to together It meets water to be reacted, realizes the recycling to ammonia and the desulfurization of flue gas, reaction equation is as follows,
2NO+O2=2NO2；3NO2+H20=2HNO3+NO；
Al(OH)3+3HNO3=Al (NO3)3+3H2O；
Al2O3+6HNO3=AL (NO3)3+3H2O；
And the solution in desulfurizing tower is recycled, reaction equation is as follows,
2NH3·H2O+SO2=(NH4)2SO+H2O；
8NH3+6NO2=7N2+12H2O；Environment is avoided while further improving the economic benefit of aluminium ash recycling Pollution.
Further, if metallic aluminium mass content is greater than 16%, before step S1 in aluminium ash further include: to aluminium ash into Row stir-frying melting extracting metals aluminium, surplus materials enter S1 processing.
Processing is carried out to aluminium ash in the embodiment of the present invention and carries out substance recycling and reusing, aluminium ash component is usually aluminium, nitridation Aluminium, aluminium oxide, aluminium hydroxide, silicon carbide etc. increase wherein first extracting metallic aluminium if aluminium content is higher in aluminium ash The efficiency for adding aluminium ash to recycle then is carrying out subsequent processing.
Further, the ball mill polishing time is 10~30min.Aluminium ash is placed in crusher and is crushed, is led to It is crushed frequently with jaw crusher, the polishing of 10~30min is then carried out with sander, so that aluminium ash becomes aluminium ashes, It is more easily reacted with other substances, while in order to guarantee so that the reaction of aluminium ashes is more abundant, by the aluminium ash after polishing Powder is sieved on the vibrating screen of 180 mesh, obtains the more tiny aluminium ashes of particle.
Further, the mass ratio of the aluminium ashes and water is 1:1~1:3.
Further, the temperature of the reaction of the reaction kettle is 60~90 DEG C, and the reaction time is 0.5h~3h.Aluminium ashes is put Enter in reaction kettle plus water is reacted, 0.5~3h is mixed in 1:1~1:3 in the mass ratio control of aluminium ashes and water, and protects Whipping temp control is demonstrate,proved at 60~90 DEG C, so that aluminium ashes, which obtains adequately reacting, generates ammonia and sediment slurry.
Further, nitrogen dioxide and the mass ratio of the sediment slurry are 3:1~1:1 in the flue gas.By generation Sediment slurry is emitted into denitrating flue gas tower, and sediment slurry main component is aluminium oxide and aluminium hydroxide, and flue gas is taken off from flue gas Nitre tower lower part bloats carries out denitration to it by sediment slurry upwards, and the remaining flue gas emission across sediment slurry is to flue gas desulfurization Desulfurization is carried out in tower, it is 3:1~1:1 that first time denitration, which controls nitrogen dioxide and the mass ratio of sediment slurry in flue gas, on the one hand It enables to the nitride in flue gas sufficiently to react, on the other hand economizes on resources, flue gas will not be caused to waste by more flue gases Cumbersome with subsequent step, denitration product can collect recycling, can be used as catalyst, anti-corrosion corrosion inhibitor etc..
Further, the water in the fume desulfurizing tower is by the way of spray.By remaining flue gas and ammonia emission to cigarette In desulfurization tower, and by way of spray ammonia is come into full contact with water in the sky with flue gas and reacted, falls Solution, which carries out recycling, can be used for the production of chemical fertilizer, and detect to reacted gas, repeat before reaching discharge standard It is reacted, is discharged after reaching discharge standard.
Further, the ammonia and the mass ratio of the remaining sulfur dioxide in flue gas are 2:1~1:1.In order to guarantee Flue gas adequately can carry out desulfurization and ammonia sufficiently reacts, and does not cause environmental pollution, and guarantees to react the feelings sufficiently completed Step and resource are saved under condition.
The application is reacted by using the flue gas of factory with aluminium ash, is carried out desulphurization denitration processing to flue gas, is realized Recycling that aluminium ash is pollution-free, and the ammonia of long-term ignored generation is effectively recycled, further improve The economic benefit that aluminium ash recycles, while avoiding pollution of the aluminium ash to environment.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein Can technical characteristic replaced mutually and the technical solution that is formed.

Claims (8)

1. the processing method that a kind of aluminium ash is used for factory smoke desulphurization denitration, which is characterized in that comprising steps of
S1: aluminium ash is crushed through crusher, is then polished with ball mill, the aluminium ash after polishing carries out on the vibrating Screening, obtains aluminium ashes；
S2: the aluminium ashes being put into reaction kettle, and water is added into reaction kettle, is mixed and is generated ammonia and precipitating slurry Liquid；
S3: the sediment slurry is emitted into denitrating flue gas tower, flue gas is by taking off the flue gas in the sediment slurry Nitre handles and collects sediment, and the flue gas across the sediment slurry is remaining flue gas；
S4: by the ammonia and remaining flue gas emission to fume desulfurizing tower, meeting water and reacted, to falling into the fume desulfurizing tower Interior solution is recycled, and the gas given off is detected, if reaching discharge standard, is discharged, otherwise repeatedly S4.
2. the processing method that aluminium ash according to claim 1 is used for factory smoke desulphurization denitration, which is characterized in that if described Metallic aluminium mass content is greater than 16%, then before step S1 in aluminium ash further include: carries out stir-frying melting extracting metals aluminium to aluminium ash, remains Excess matter enters S1 processing.
3. the processing method that aluminium ash according to claim 1 or 2 is used for factory smoke desulphurization denitration, which is characterized in that institute Stating the ball mill polishing time is 10~30min.
4. the processing method that aluminium ash according to claim 1 or 2 is used for factory smoke desulphurization denitration, which is characterized in that institute The mass ratio for stating aluminium ashes and water is 1:1~1:3.
5. the processing method that aluminium ash according to claim 1 or 2 is used for factory smoke desulphurization denitration, which is characterized in that institute The temperature for stating the reaction of reaction kettle is 60~90 DEG C, and the reaction time is 0.5h~3h.
6. the processing method that aluminium ash according to claim 1 or 2 is used for factory smoke desulphurization denitration, which is characterized in that institute Stating nitrogen dioxide and the mass ratio of the sediment slurry in flue gas is 3:1~1:1.
7. the processing method that aluminium ash according to claim 1 or 2 is used for factory smoke desulphurization denitration, which is characterized in that institute The water in fume desulfurizing tower is stated by the way of spray.
8. the processing method that aluminium ash according to claim 1 or 2 is used for factory smoke desulphurization denitration, which is characterized in that institute The mass ratio for stating ammonia and the remaining sulfur dioxide in flue gas is 2:1~1:1.
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CN107321227B (en) * 2017-07-07 2020-09-08 江苏海光金属有限公司 Slurry preparation device for aluminum ash hydrolysis and denitrification pretreatment
CN109675433B (en) * 2019-01-25 2021-11-30 山东东源新材料科技有限公司 Flue gas denitration process
CN109590316A (en) * 2019-01-25 2019-04-09 刘卫东 A kind of device and method of aluminium ash deamination
CN110449123B (en) * 2019-07-24 2022-04-26 西安建筑科技大学 Sintering flue gas desulfurization and denitrification material and preparation method thereof
CN112076618B (en) * 2020-09-17 2022-08-09 刘保成 Method for desulfurization and denitrification of refractory bricks by using denitrification agent
CN112295384A (en) * 2020-10-15 2021-02-02 西南科技大学 Method for preparing flue gas purifying agent from aluminum ash
CN112755749A (en) * 2020-12-23 2021-05-07 新疆生产建设兵团第八师天山铝业有限公司 Process for using electrolytic aluminum ash for electrolytic flue gas desulfurization
CN117205732B (en) * 2023-09-25 2024-04-05 河南亿水源净水材料科技有限公司 Aluminum ash processing raw material storage system and method

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CN1927718A (en) * 2006-10-12 2007-03-14 上海上大珊尔环保科技有限公司 Method of preparing sodium aluminate from waste aluminium ash
CN102179161A (en) * 2011-05-04 2011-09-14 山东大学 Slurry for desulfuration and denitration of recirculating fluidized bed boiler

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Publication number Priority date Publication date Assignee Title
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CN1308985A (en) * 2000-11-28 2001-08-22 中国科学院山西煤炭化学研究所 Process for using iron-series metal oxide as desulfurizing agent
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CN102179161A (en) * 2011-05-04 2011-09-14 山东大学 Slurry for desulfuration and denitration of recirculating fluidized bed boiler

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