CN106178922B - Slag micro powder and activated carbon from activated sludge composite desulfurizing agent and its preparation method and application - Google Patents
Slag micro powder and activated carbon from activated sludge composite desulfurizing agent and its preparation method and application Download PDFInfo
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- CN106178922B CN106178922B CN201610614269.8A CN201610614269A CN106178922B CN 106178922 B CN106178922 B CN 106178922B CN 201610614269 A CN201610614269 A CN 201610614269A CN 106178922 B CN106178922 B CN 106178922B
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/78—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with alkali- or alkaline earth metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
Abstract
The present invention provides a kind of slag micro powder and activated carbon from activated sludge composite desulfurizing agent and its preparation method and application, and the slag micro powder and activated carbon from activated sludge composite desulfurizing agent include following parts by weight substance: 10.0~25.0 species activity charcoal 75.0~90.0 of slag micro powder.It may be implemented to turn waste into wealth using the present invention, while improving the desulfuration efficiency of activated carbon from activated sludge.
Description
Technical field
The present invention relates to a kind of slag micro powders and activated carbon from activated sludge composite desulfurizing agent and its preparation method and application.
Background technique
SO2Be one of the major pollutants of atmosphere, very big harm not only caused to human health, also corrosion building and
Material reduces product quality, and influences animal and plant growth, development.To SO2The control of discharge is mainly by using low-sulphur fuel
It is realized with the modes such as desulfurization and end tail gas desulfurization in substitution clean energy resource, Desulphurization of fuels, combustion process.It is higher for concentration
SO2Gas is removed using desulfurizing agent by wet process, dry process.
Desulfurization is carried out to flue gas using active carbon, has the advantages that simple process and renewable recycling, is to have to answer
With one of the fume desulphurization method of potentiality.Although the raw material sources for preparing active carbon are extensive, most of carbonaceous material can be made
Standby Viability charcoal, but the selection of raw material Properties of Activated Carbon is served it is vital.Plant biological is generallyd use at present
Substance is as the raw material for preparing active carbon, i.e. timber, wood sawdust, shell, fruit stone, bamboo, stalk etc., it is contemplated that raw material
Cost and ecological environment sustainability, prepare one important channel of active carbon using bio-waste.
Although preparing active carbon using bio-waste, cost of material and ecology can be preferably solved to a certain extent
The problem of Environmental Sustainability.But since that there are desulfurization capacities is low for active carbon, when causing to carry out desulfurization to flue gas, active carbon
Demand is big, regeneration is frequent, loss is larger, causes desulphurization cost higher, seriously hinders the industrial application of this method.
Steel slag is the byproduct generated in steelmaking process as a kind of alkaline Silicon-rich substance, main component include CaO,
MgO、SiO2、Fe2O3、Al2O3, there are also a small amount of Na2O、P2O5, MnO and transition metal oxide TiO2。
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of slag micro powder and biomass are living
Property charcoal composite desulfurizing agent and its preparation method and application, provides a kind of specific embodiment to turn waste into wealth, solves waste
While, also obtain desulfurization product.
In order to achieve the above objects and other related objects, the present invention provides a kind of slag micro powder and activated carbon from activated sludge is compound
Desulfurizing agent, the slag micro powder and activated carbon from activated sludge composite desulfurizing agent include following parts by weight substance:
Slag micro powder 10.0~25.0
Activated carbon from activated sludge 75.0~90.0.
Preferably, the slag micro powder is selected from converter hot splashing slag, casting residue, converter drum slag, desulfurizing slag of hot metal, electric furnace heat
Sprinkle slag
With any one or a few mixing in electric furnace roller slag.
Preferably, the partial size of the slag micro powder is 2.5 μm~112.0 μm.
Preferably, the slag micro powder includes the substance of following parts by weight:
Preferably, the steel slag further includes the substance of following parts by weight:
Preferably, the activated carbon from activated sludge porosity is 70%~80%, and pore-size distribution is 10 μm~100 μm.
Another aspect of the present invention provides the preparation method of slag micro powder Yu activated carbon from activated sludge composite desulfurizing agent, until
Less the following steps are included:
(1) provide slag micro powder: the slag micro powder is selected from converter hot splashing slag, casting residue, converter drum slag, desulfurizing iron
In slag, electric furnace hot splashing slag or electric furnace roller slag any one or it is several；
(2) preparation of activated carbon from activated sludge；
(3) preparation of slag micro powder and activated carbon from activated sludge composite desulfurizing agent: slag micro powder and activated carbon from activated sludge are pressed
Mixing, through CO2Activation to get.
The CO2Activation, which refers to, is placed in CO for slag micro powder and activated carbon from activated sludge composite desulfurizing agent2In gaseous environment therewith
Reaction forms flourishing microcellular structure in material internal so that unordered charcoal partial oxidation etches pore-forming in Carbon Materials.Carbonization temperature
Generally 600 DEG C.
Preferably, the converter hot splashing slag in the step (1) is had bad luck using hot application impregnates vessel slag acquisition in slag ladle, described
Converter drum slag is obtained using roller process vessel slag, the electric furnace hot splashing slag had bad luck using hot application impregnate electroslag in slag ladle and
It obtains, the electric furnace roller slag is obtained using electroslag reason at roller.
Preferably, the preparation method of activated carbon from activated sludge at least includes the following steps in institute's step (2):
A. biological waste raw material dried, ground；
B. biological waste raw material is mixed with phosphoric acid, is placed in vacuum oven and is activated, before activated carbon from activated sludge is made
Body；
C. heat-activated is carried out to the activated carbon from activated sludge precursor prepared in step b using microwave heating method.
Preferably, any one of the step a biological waste raw material in walnut shell, stalk, rice husk or peanut shell
Or it is several.
Preferably, the biological waste raw material is selected from walnut shell, and the drying is small using 40-50 is dried at 100- DEG C 105 DEG C
When, the milling time is 6-10 hours, and walnut shell is mixed with phosphoric acid 1:1~1:4 in mass ratio in the step b.
Preferably, in the step b vacuum oven vacuum degree be -0.08MPa~-0.02Mpa, temperature be 70 DEG C~
110 DEG C, activation time is 3~5h.
Preferably, 500W~800W of the micro-wave oven that microwave heating method uses in the step c, heating time for 5min~
15min。
Preferably, CO in the step (3)2The time of activation is 8~16 hours.
Another aspect of the present invention provides slag micro powder and activated carbon from activated sludge composite desulfurizing agent is used for the use of desulfurization
On the way.
The principles of science of the invention:
1) desulfurization-catalytic mechanism of slag micro powder
Chief active component is SiO in slag micro powder2、Fe2O3、Al2O3, CaO, MgO etc., therefore chemistry is anti-in sweetening process
Mechanism is answered to be similar to CaO, Ca (OH)2, SO2It reacts on slag micro powder/activated carbon from activated sludge composite desulfurizing agent surface as follows:
CaO+SO2——→CaSO3
Ca(OH)2+SO2——→CaSO3+H2O
CaSO3+SO2+H2O——→Ca(HSO3)2
Since compositions certain in slag micro powder play catalysis, catalytic oxidation is also carried out:
2CaSO3+SO2——→2CaSO4
2Ca(HSO3)2+O2——→2CaSO4+2SO2+2H2O 2SO2+O2+2H2O——→2H2SO4,
H2SO4+CaO——→CaSO4+H2O
There are also minimal amount of alkaline earth oxides in slag micro powder, may participate in desulphurization reaction, are conducive to sweetening process.
2) adsorption mechanism of activated carbon from activated sludge
SO2After activated carbon from activated sludge adsorbs, on its surface with SO4 2-Form exist.It can be seen that SO2Through in biomass active
The adsorption process of carbon surface includes 3 stages, i.e. the first stage is extra-granular diffusion phase, SO2Biology is diffused to from outside
Activated carbon surface.Second stage is hole diffusion phase, SO2Adsorption site is diffused in duct.Phase III is
SO2With the interaction of activated carbon from activated sludge, the most slow process of medium-rate is main rate determining step.
3) coordinated desulfurization mechanism
Slag micro powder and activated carbon from activated sludge composite desulfurizing agent, using the absorption property of activated carbon from activated sludge, to SO2It carries out
A large amount of absorption, while the alkali environment (CaO) and catalytic performance that are provided using slag micro powder carry out desulfurization, to realize to SO2
Physical absorption and chemical desulfurization-catalysis synergistic effect.
As described above, slag micro powder of the invention and activated carbon from activated sludge composite desulfurizing agent and its preparation and application, have
Below the utility model has the advantages that
1, the present invention carries out flue gas desulfurization using physical absorption and chemical desulfurization-catalysis synergistic effect, not only solves
The low problem reversible with absorption of active carbon desulfurization capacity, and desulfuration efficiency is increased, preparation cost is reduced, product is improved
The market competitiveness brings good economic benefit；
2, slag micro powder of the present invention meets the political affairs of related energy conservation and environmental protection, circular economy to activated carbon from activated sludge composite desulfurizing agent
Plan requirement, realizes " treatment of wastes with processes of wastes against one another ", solves the problems, such as that active carbon desulfurization capacity is low reversible with absorption, increases desulfurization effect
Rate reduces preparation cost, has opened up Novel flue gas desulfurizing agent.
Detailed description of the invention
Fig. 1 is shown as desulfurization apparatus structure schematic diagram in the present invention.
1, steel cylinder, 2, flowmeter, 3, surge flask, 4, syringe pump, 5, heating tape, 6, reactor.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
It should be clear that in the following example not specifically dated process equipment or device be all made of conventional equipment in the art or
Device.
In addition, it should also be understood that, one or more method and step mentioned in the present invention does not repel before and after the combination step
It can also be inserted into other methods step there may also be other methods step or between these explicitly mentioned steps, unless separately
It is described；It should also be understood that the combination connection relationship between one or more equipment/device mentioned in the present invention is not repelled
The two equipment/devices specifically mentioned before and after the unit equipment/device there may also be other equipment/device or at these it
Between can also be inserted into other equipment/device, unless otherwise indicated.Moreover, unless otherwise indicated, the number of various method steps is only
Identify the convenient tool of various method steps, rather than for the arrangement order of limitation various method steps or limits the enforceable model of the present invention
It encloses, relativeness is altered or modified, and without material changes in technical content, when being also considered as, the present invention is enforceable
Scope.
Embodiment 1
It water is had bad luck in slag ladle using hot application impregnates converter Slag treatment and obtain converter hot splashing slag, partial size is 5.48 μm~
104.30 μm, chemical component (mass fraction) is SiO2(11.06%), Fe2O3(24.40%), Al2O3(2.30%), CaO
(46.78%), MgO (5.75%), P2O5(0.91%), MnO (2.19%), SO3(0.23%) and other (6.38%).
1000g is discarded walnut shell to clean, and is dried 48 hours at 105 DEG C；The discarded walnut shell of drying is taken to be put into ball milling
Machine obtains discarded walnut shell powder by 8 hours grindings.Discarded walnut shell powder is mixed with phosphoric acid 1:1 in mass ratio, so
It is placed in the vacuum oven that vacuum degree is -0.08MPa, temperature is 80 DEG C afterwards to be activated, activation time 4h is given birth to
Species activity carbon precursor.Using microwave heating method to activated carbon precursor carry out it is physically activated, wherein microwave power be 700W,
Activation time is 5min and phosphoric acid quality score is 80%, obtains activated carbon from activated sludge, porosity 72.6%, pore-size distribution
It is 15.2 μm~94.7 μm.
Molding, 16 hours CO is blended with activated carbon from activated sludge 10%:90% by weight percentage in slag micro powder2It is living
Change, obtains slag micro powder and activated carbon from activated sludge composite desulfurizing agent.
Embodiment 2
Casting residue, partial size are 5.04 μm~105.30 μm, and chemical component (mass fraction) is SiO2(14.75%),
Fe2O3(12.92%), Al2O3(10.97%), CaO (46.93%), MgO (3.06%), P2O5(0.50%), MnO
(1.67%), SO3(1.26%) and other (7.94%).
1000g is discarded walnut shell to clean, and is dried 50 hours at 100 DEG C；The discarded walnut shell of drying is taken to be put into ball milling
Machine obtains discarded walnut shell powder by 6 hours grindings.Discarded walnut shell powder is molten for 80% phosphoric acid with phosphoric acid quality score
Liquid 1:2 in mass ratio is mixed, and is then placed into the vacuum oven that vacuum degree is -0.06MPa, temperature is 70 DEG C and is lived
Change, activation time 5h, obtains biomass active carbon precursor.Physics is carried out to activated carbon precursor using microwave heating method
Activation, wherein microwave power be 800W, activation time 15min, obtain activated carbon from activated sludge, porosity 79.7%, hole
Diameter is distributed as 12.8 μm~90.2 μm.
Molding, 12 hours CO is blended with activated carbon from activated sludge 20%:80% by weight percentage in slag micro powder2It is living
Change, obtains slag micro powder and activated carbon from activated sludge composite desulfurizing agent.
Embodiment 3
Converter drum slag is obtained using roller process vessel slag, partial size is 2.68 μm~92.14 μm, chemical component (matter
Measure score) it is SiO2(12.31%), Fe2O3(25.08%), Al2O3(1.56%), CaO (47.00%), MgO (5.61%),
P2O5(0.99%), MnO (1.80%), SO3(0.13%) and other (5.52%).
1000g peanut shell is cleaned, and is dried 48 hours at 105 DEG C；It takes the discarded peanut shell of drying to be put into ball mill, passes through
8 hours grindings are crossed, discarded peanut shell powder is obtained.The phosphoric acid solution that useless peanut shell powder and phosphoric acid quality score are 80% is pressed into quality
It is mixed than 1:3, is then placed into the vacuum oven that vacuum degree is -0.04MPa, temperature is 100 DEG C and is activated, lived
The change time is 4h, obtains biomass active carbon precursor.It is physically activated to activated carbon precursor progress using microwave heating method,
Middle microwave power is 500W, activation time 10min, obtains activated carbon from activated sludge, porosity 73.9%, and pore-size distribution is
19.0 μm~92.7 μm.
Molding, 8 hours CO is blended with activated carbon from activated sludge 15%:85% by weight percentage in slag micro powder2Activation,
Obtain slag micro powder and activated carbon from activated sludge composite desulfurizing agent.
Embodiment 4
Desulfurizing slag of hot metal, partial size are 4.70 μm~90.29 μm, and chemical component (mass fraction) is SiO2(15.32%),
Fe2O3(12.64%), Al2O3(5.47%), CaO (51.34%), MgO (3.47%), P2O5(0.50%), MnO (0.80%),
SO3(2.06%) and other (8.40%).
1000g is discarded into walnut shell and stalk is cleaned, and is dried 48 hours at 105 DEG C；Take drying discarded walnut shell and
Stalk is put into ball mill, by 8 hours grindings, obtains discarded walnut shell powder.It is by discarded walnut shell powder and phosphoric acid quality score
80% phosphoric acid solution 1:4 in mass ratio is mixed, and being then placed into vacuum degree is -0.02MPa, vacuum at a temperature of 90 °C
Drying box is activated, activation time 4h, obtains biomass active carbon precursor.Using microwave heating method to active carbon before
Drive body carry out it is physically activated, wherein microwave power be 600W, activation time 10min, obtain activated carbon from activated sludge, porosity
It is 70.7%, pore-size distribution is 10.8 μm~94.6 μm.
Molding, 14 hours CO is blended with activated carbon from activated sludge 25%:75% by weight percentage in slag micro powder2It is living
Change, obtains slag micro powder and activated carbon from activated sludge composite desulfurizing agent.
Embodiment 5
Water in slag ladle is had bad luck using hot application and impregnates electroslag acquisition electric furnace hot splashing slag, partial size is 6.35 μm~111.50 μ
M, chemical component (mass fraction) are SiO2(13.04%), Fe2O3(29.91%), Al2O3(3.26%), CaO (41.18%),
MgO (3.37%), P2O5(0.69%), MnO (3.56%), SO3(0.28%) and other (4.71%).
1000g is discarded rice husk to clean, and is dried 48 hours at 105 DEG C；The discarded walnut shell of drying is taken to be put into ball mill,
By 8 hours grindings, discarded powdered rice hulls are obtained.The phosphoric acid solution that discarded powdered rice hulls and phosphoric acid quality score are 80% is pressed into quality
It is mixed than 1:3, is then placed into vacuum degree and is activated for -0.06MPa, vacuum oven at a temperature of 90 °C, lived
The change time is 4h, obtains biomass active carbon precursor.It is physically activated to activated carbon precursor progress using microwave heating method,
Middle microwave power is 700W, activation time be 5min and, obtain activated carbon from activated sludge, porosity 70.7%, pore-size distribution
It is 10.8 μm~94.6 μm.
Molding, 10 hours CO is blended with activated carbon from activated sludge 15%:85% by weight percentage in slag micro powder2It is living
Change, obtains slag micro powder and activated carbon from activated sludge composite desulfurizing agent.
Embodiment 6
Electric furnace roller slag is obtained using roller process electroslag, partial size is 5.40 μm~111.60 μm, chemical component (matter
Measure score) it is SiO2(11.14%), Fe2O3(33.14%), Al2O3(2.79%), CaO (38.94%), MgO (3.40%),
P2O5(0.19%), MnO (3.49%), SO3(0.28%) and other (6.63%).
1000g is discarded walnut shell to clean, and is dried 48 hours at 105 DEG C；The discarded walnut shell of drying is taken to be put into ball milling
Machine obtains discarded walnut shell powder by 8 hours grindings.Discarded walnut shell powder is molten for 80% phosphoric acid with phosphoric acid quality score
Liquid 1:2 in mass ratio is mixed, and is then placed into the vacuum oven that vacuum degree is -0.04MPa, temperature is 70 DEG C and is lived
Change, activation time 4h, obtains biomass active carbon precursor.Physics is carried out to activated carbon precursor using microwave heating method
Activation, wherein microwave power be 600W, activation time 15min, obtain activated carbon from activated sludge, porosity 78.1%, hole
Diameter is distributed as 15.1 μm~96.9 μm.
Molding, 12 hours CO is blended with activated carbon from activated sludge 20%:80% by weight percentage in slag micro powder2It is living
Change, obtains slag micro powder and activated carbon from activated sludge composite desulfurizing agent.
Embodiment 7
It water is had bad luck in slag ladle using hot application impregnates converter Slag treatment and obtain converter hot splashing slag, partial size is 5.48 μm~
104.30 μm, chemical component (mass fraction) is SiO2(11.06%), Fe2O3(24.40%), Al2O3(2.30%), CaO
(46.78%), MgO (5.75%), P2O5(0.91%), MnO (2.19%), SO3(0.23%) and other (6.38%).
Electric furnace roller slag is obtained using roller process electroslag, partial size is 5.40 μm~111.60 μm, chemical component (matter
Measure score) it is SiO2(11.14%), Fe2O3((33.14%), Al2O3(2.79%), CaO (38.94%), MgO (3.40%),
P2O5(0.19%), MnO (3.49%), SO3(0.28%) and other (6.63%).
1000g is discarded walnut shell to clean, and is dried 48 hours at 105 DEG C；The discarded walnut shell of drying is taken to be put into ball milling
Machine obtains discarded walnut shell powder by 8 hours grindings.Discarded walnut shell powder is molten for 80% phosphoric acid with phosphoric acid quality score
Liquid 1:2 in mass ratio is mixed, and is then placed into the vacuum oven that vacuum degree is -0.04MPa, temperature is 70 DEG C and is lived
Change, activation time 4h, obtains biomass active carbon precursor.Physics is carried out to activated carbon precursor using microwave heating method
Activation, wherein microwave power be 600W, activation time 15min, obtain activated carbon from activated sludge, porosity 78.1%,
Pore-size distribution is 15.1 μm~96.9 μm.
Molding, 12 hours CO is blended with activated carbon from activated sludge 20%:80% by weight percentage in two kinds of slag micro powders2
Activation obtains slag micro powder and activated carbon from activated sludge composite desulfurizing agent.
Embodiment 8
Casting residue, partial size are 5.04 μm~105.30 μm, and chemical component (mass fraction) is SiO2(14.75%),
Fe2O3(12.92%), Al2O3(10.97%), CaO (46.93%), MgO (3.06%), P2O5(0.50%), MnO
(1.67%), SO3(1.26%) and other (7.94%).
Desulfurizing slag of hot metal, partial size are 4.70 μm~90.29 μm, and chemical component (mass fraction) is SiO2(15.32%),
Fe2O3(12.64%), Al2O3(5.47%), CaO (51.34%), MgO (3.47%), P2O5(0.50%), MnO (0.80%),
SO3(2.06%) and other (8.40%).
1000g is discarded walnut shell to clean, and is dried 48 hours at 105 DEG C；The discarded walnut shell of drying is taken to be put into ball milling
Machine obtains discarded walnut shell powder by 8 hours grindings.Discarded walnut shell powder is molten for 80% phosphoric acid with phosphoric acid quality score
Liquid 1:2 in mass ratio is mixed, and is then placed into the vacuum oven that vacuum degree is -0.04MPa, temperature is 70 DEG C and is lived
Change, activation time 4h, obtains biomass active carbon precursor.Physics is carried out to activated carbon precursor using microwave heating method
Activation, wherein microwave power be 600W, activation time 15min, obtain activated carbon from activated sludge, porosity 78.1%, hole
Diameter is distributed as 15.1 μm~96.9 μm.
Molding, 12 hours CO2 is blended with activated carbon from activated sludge 20%:80% by weight percentage in two kinds of slag micro powders
Activation obtains slag micro powder/activated carbon from activated sludge composite desulfurizing agent.
The slag micro powder and activated carbon from activated sludge composite desulfurizing agent sample for preparing Examples 1 to 8 carry out flue gas desulfurization performance
Detection process is as follows:
Experimental provision such as Fig. 1,6 size Φ 18mm × 300mm of reactor, slag micro powder and the compound desulfurization of activated carbon from activated sludge
Agent packed height is 150mm, quality 18g.Using SO2、O2、N2The simulated flue gas that steel cylinder 1 is prepared, flows through flowmeter 2, passes through
Surge flask 3 enters in humidifier after mixing, is humidified using syringe pump 4.Then enter after heating belt 5 heats and load steel
The reactor 6 of slag micro mist and activated carbon from activated sludge composite desulfurizing agent, purified gas first pass through tail gas absorber, then pass through
It is emptied after wet gas flow meter metering.Enter the SO of 6 front and back of reactor by measuring gas2Content analysis desulfuration efficiency.SO2
Content (volume fraction, similarly hereinafter) using hydrogen peroxide method measure, when export content be import content 10% when, be considered as and wear
Thoroughly.Above-mentioned desulfurization related process parameters: import SO2Content 0.25%, air speed 750h-1,85 DEG C of bed temperature, vapor
Content 9%, oxygen content 12%.
1. slag micro powders of table/activated carbon from activated sludge composite desulfurizing agent working sulfur capacity and desulfurization time of break-through
Thus, it can be seen that using desulfurizing agent of the present invention, it is with higher de- relative to common activated carbon from activated sludge
Sulphur efficiency.
Above embodiment is can not to be interpreted as in order to illustrate embodiment disclosed by the invention to limit of the invention
System.In addition, in various modifications and invention listed herein method, composition variation, do not departing from the scope of the present invention
Be obvious for those skilled in the art under the premise of spirit.Although having combined of the invention a variety of specific
Preferred embodiment has carried out specific description to the present invention, it is to be understood that, the present invention should not be limited only to these specific embodiments.
In fact, various obviously modify as described above for those skilled in the art to obtain invention all should include
Within the scope of the invention.
Claims (8)
1. a kind of slag micro powder and activated carbon from activated sludge composite desulfurizing agent, which is characterized in that the slag micro powder and biomass are living
Property charcoal composite desulfurizing agent includes following parts by weight substance:
Slag micro powder 10.0~25.0
Activated carbon from activated sludge 75.0~90.0；
Any one or a few in walnut shell, stalk, rice husk or peanut shell of the biomass active carbon feedstock；
The preparation method of the slag micro powder and activated carbon from activated sludge composite desulfurizing agent, at least includes the following steps:
(1) provide slag micro powder: the slag micro powder be selected from converter hot splashing slag, casting residue, converter drum slag, desulfurizing slag of hot metal,
In electric furnace hot splashing slag or electric furnace roller slag any one or it is several；
(2) preparation of activated carbon from activated sludge；
(3) preparation of slag micro powder and activated carbon from activated sludge composite desulfurizing agent: slag micro powder is mixed with activated carbon from activated sludge, warp
CO2Activation, CO2The time of activation be 8~16 hours to get；
The preparation method of activated carbon from activated sludge at least includes the following steps in institute's step (2):
A. biological waste raw material dried, ground；
B. biological waste raw material is mixed with phosphoric acid, is placed in vacuum oven and is activated, activated carbon from activated sludge precursor is made；
The vacuum degree of vacuum oven is -0.08MPa~-0.02Mpa, and temperature is 70 DEG C~110 DEG C, and activation time is 3~5h
C. heat-activated is carried out to the activated carbon from activated sludge precursor prepared in step b using microwave heating method；The function of micro-wave oven
Rate is 500W~800W, heating time is 5min~15min.
2. slag micro powder according to claim 1 and activated carbon from activated sludge composite desulfurizing agent, it is characterised in that: the steel slag
The partial size of micro mist is 2.5 μm~112.0 μm.
3. slag micro powder according to claim 1 and activated carbon from activated sludge composite desulfurizing agent, it is characterised in that: the steel slag
Micro mist includes the substance of following parts by weight:
4. slag micro powder according to claim 3 and activated carbon from activated sludge composite desulfurizing agent, it is characterised in that:
The steel slag further includes the substance of following parts by weight:
5. slag micro powder according to claim 1 and activated carbon from activated sludge composite desulfurizing agent, it is characterised in that: the biology
Activated carbon porosity is 70%~80%, and pore-size distribution is 10 μm~100 μm.
6. slag micro powder according to claim 1 and activated carbon from activated sludge composite desulfurizing agent, it is characterised in that: the step
(1) the converter hot splashing slag in has bad luck water in slag ladle using hot application and impregnates vessel slag acquisition, and the converter drum slag is using at roller
It manages vessel slag to obtain, the electric furnace hot splashing slag is had bad luck water immersion electroslag in slag ladle using hot application and obtained, the electric furnace roller
Slag is obtained using electroslag reason at roller.
7. slag micro powder according to claim 1 and activated carbon from activated sludge composite desulfurizing agent, it is characterised in that: the biology
Scrap feed material is selected from walnut shell, and using drying 40-50 hours at 100 DEG C -105 DEG C, the milling time is that 6-10 is small for the drying
When, walnut shell is mixed with phosphoric acid 1:1~1:4 in mass ratio in the step b.
8. the slag micro powder and activated carbon from activated sludge composite desulfurizing agent as described in claim 1-7 any one are used for desulfurization.
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