CN106477617B - A kind of flue gas desulfurization byproduct low-temperature oxidation device - Google Patents
A kind of flue gas desulfurization byproduct low-temperature oxidation device Download PDFInfo
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- CN106477617B CN106477617B CN201611068288.1A CN201611068288A CN106477617B CN 106477617 B CN106477617 B CN 106477617B CN 201611068288 A CN201611068288 A CN 201611068288A CN 106477617 B CN106477617 B CN 106477617B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/464—Sulfates of Ca from gases containing sulfur oxides
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/46—Sulfur-, selenium- or tellurium-containing compounds
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/60—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
- C30B29/62—Whiskers or needles
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Abstract
The invention discloses a kind of flue gas desulfurization byproduct low-temperature oxidation devices, belong to desulfurizing byproduct resource applied technical field.The present invention includes oxidation unit and agitation grinding unit, wherein oxidation unit includes oxidation air blowing component and grinding oxidation chamber, aoxidize the lower part that air blowing component is located at grinding oxidation chamber, oxidation air blowing component is used to blast oxygen-enriched air to grinding oxidation chamber, and the grinding oxidation chamber is made of arc ground section and milling gap section；The agitation grinding unit includes driving motor and agitation grinding blade, and agitation grinding blade is provided on driving motor, and the provided circumferentially about of the agitation grinding blade has blade to grind circular arc；Grinding movement occurs in the driving inferior lobe slice lapping circular arc and arc ground section of driving motor.It is of the invention that interval grinding is carried out during oxidation, enable the particle of removal surface indissoluble object in time in conjunction with the oxygen in solution, to promote the quick oxidation of desulfurizing byproduct.
Description
Technical field
The present invention relates to the recycling application fields of desulfurizing byproduct, more specifically to a kind of flue gas desulfurization by-product
Object low-temperature oxidation device.
Background technique
With the lasting fast development of China's steel and iron industry, generated problem of environmental pollution is very prominent, and especially " three
It is useless " discharge aspect is by national highest attention, by SO in " the steel and iron industry emission standard " of newest revision2Discharge
As one of important content, mandatory provisions steel industry wants time limit to realize emission reduction and flue gas qualified discharge for control.In China
Iron and steel enterprise, SO2Discharge amount is only second to the discharge amount of power industry and Industrial Boiler, occupies the 3rd, and the SO of iron and steel enterprise's discharge2
Middle 50%-70% comes from sintering process, is sintered flue gas desulfurization using semi-dry desulphurization technology, not only invests low, and desulfurization
Rate is higher, but a large amount of desulfurizing byproduct is produced during semi-dry desulphurization, currently, only small part desulfurization both at home and abroad
By-product is utilized, and the overwhelming majority is abandoned, if do not utilized rationally, it will is caused secondary pollution and is occupied a large amount of soil
Ground.
In order to realize that the recycling application to desulfurizing byproduct, colleges and universities and enterprise are attached to sinter flue gas desulfurization byproduct height
Numerous studies have been carried out in value added utilization, and it is with higher additional that discovery uses sintering flue gas desulfurization by-product to prepare calcium sulfate crystal whiskers
Value, calcium sulfate crystal whiskers are a kind of staple fibers grown with single crystal form, it has uniform cross section, complete shape and height
Perfect internal structure is spent, compared with glass fibre, advantage is that it has high intensity, and subtle size is easier to and sets
The organic high molecular compounds such as rouge, rubber, plastics combine, and the presentation quality of product is excellent.
Due to CaSO in desulfurizing byproduct3Content it is higher, limit the direct use of desulfurizing byproduct, desulfurizing byproduct
Before carrying out preparing calcium sulfate crystal whiskers, it is desirable that desulfurizing byproduct carries out sufficient oxidation modification processing, it usually needs closed
Desulfurizing byproduct is heated to promote CaSO in container3Oxidation.On the one hand existing method for oxidation is difficult to realize to desulfurization by-product
Object it is fully oxidized, to limit the value added applications of desulfurizing byproduct；On the other hand energy consumption is high for the method for oxidation, desulfurization
By-product oxidation is with high costs, to limit the recycling application of desulfurizing byproduct.
The Shi Peiyang of Northeastern University has also carried out first closing research, and has applied for related patents: utilizing sinter flue gas desulfurization
By-product prepares the method (application number: 201010545829.1 of calcium sulfate crystal whiskers；The applying date: 2010.11.16) and utilize flue gas
Desulfurized gypsum prepares the method (application number: 200810011193.5 of calcium sulfate crystal whiskers；The applying date: 2008.04.25), it is same right
Desulfurizing byproduct carries out that high-temperature oxydation is modified, high temperature it is modified oxidized, the modified oxidized temperature of high temperature is 110 DEG C -300
DEG C, high-temperature oxydation improves the oxidation efficiency of desulfurizing byproduct sulfite calcium.But existing personnel have been devoted in height
The method for oxidation of desulfurizing byproduct is researched and developed under the conditions of temperature, and is generally believed and be difficult to realize the effective of desulfurizing byproduct under cryogenic conditions
Oxidation, and the low-temperature oxidation of desulfurizing byproduct proposed by the present invention breaks the technology prejudice.
This is because although high-temperature oxidation method improves the oxygenation efficiency of desulfurizing byproduct, for 110 DEG C -300 DEG C of height
Temperature is fully oxidized, needs the efficient oxidation in high-pressure closed vessel to desulfurizing byproduct；This method needs to build enclosed high pressure
Environment, and need to be added complicated oxidant into desulfurizing byproduct solution, so that oxidation is with high costs, it is difficult to realize desulfurization
The industrial application of by-product.Therefore, urgent need develops a kind of oxidation of desulfurizing byproduct suitable for industrial application
Reforming apparatus, so that the high efficient resourcing application for desulfurizing byproduct lays the foundation.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome in the prior art, low-temperature oxidation is difficult to realize during desulfurizing byproduct is modified
The problem of, a kind of flue gas desulfurization byproduct low-temperature oxidation device is provided, the cryogenic oxygen rate of desulfurizing byproduct is substantially increased, is
The high efficient resourcing application of desulfurizing byproduct lays the foundation.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of flue gas desulfurization byproduct low-temperature oxidation device of the invention, including oxidation unit,
The oxidation unit includes oxidation air blowing component and grinding oxidation chamber, wherein oxidation air blowing component is located at grinding oxidation
The lower part of cavity, oxidation air blowing component are used to blast oxygen-enriched air to grinding oxidation chamber, and the grinding oxidation chamber is by arc
Shape ground section and milling gap section composition；
Agitation grinding unit, the agitation grinding unit include driving motor and agitation grinding blade, the driving motor
On be provided with agitation grinding blade, the agitation grinding blade it is provided circumferentially about have blade grind circular arc；Above-mentioned agitation grinding
Blade is located in grinding oxidation chamber, and the blade grinding circular arc of agitation grinding blade is matched with arc ground section, is being driven
Grinding movement occurs for the driving inferior lobe slice lapping circular arc and arc ground section of motor.
Preferably, the arc ground section is equal to arc ground section and stirs at a distance from agitation grinding blade center of rotation
The distance of grind blade center of rotation is mixed, and the arc radius of arc ground section is identical as the blade grinding arc radius of circular arc.
Preferably, the milling gap section is greater than arc ground section and stirs at a distance from agitation grinding blade center of rotation
Mix the distance of grind blade center of rotation.
Preferably, the cross section of the grinding oxidation chamber is ellipse, is at the minor axis vertex of the ellipse
Arc ground section.
Preferably, the oxidation unit further includes cone-shaped collection storehouse, which is back taper, the oxidation
Air blowing component is connected by cone-shaped collection storehouse with grinding oxidation chamber.
Preferably, the agitation grinding unit further includes motor driving shaft and blade connecting rod, the driving motor
It is connected by motor driving shaft with blade connecting rod, is provided with agitation grinding blade in the blade connecting rod.
Preferably, the bottom of the motor driving shaft is provided with drive shaft top blast stomata.
Preferably, blade chamfering is provided on the agitation grinding blade.
Preferably, Ceramic Balls are laid in the oxidation air blowing component.
Preferably, heating water bath case is provided with outside the grinding oxidation chamber.
3. beneficial effect
Using technical solution provided by the invention, compared with existing well-known technique, there is following remarkable result:
(1) a kind of flue gas desulfurization byproduct low-temperature oxidation device of the invention is ground desulfurizing byproduct particle surface
The calcium sulfate for being attached to desulfurizing byproduct particle surface, i.e., be ground by the grinding removal of indissoluble object under the action of mechanical force is ground
Removal, so that the calcium sulfite inside particle is exposed to particle surface, promotes the contact of oxygen molecule with calcium sulfite surface,
So that the calcium sulfite in desulfurizing byproduct is constantly contacted with oxygen, accelerate and promote the oxidation of the calcium sulfite inside particle,
And the oxygenation efficiency of calcium sulfate in desulfurizing byproduct is substantially increased, so that SO3 2-Oxygenation efficiency reach 78.52%, desulfurizing byproduct
Effectively aoxidized.
(2) a kind of flue gas desulfurization byproduct low-temperature oxidation device of the invention carries out interval grinding during oxidation,
Ensure that and remove the indissoluble object on desulfurizing byproduct surface, in turn ensure after grinding desulfurizing byproduct in time with agitation grinding leaf
Piece separation enables the particle of removal surface indissoluble object in time in conjunction with the oxygen in solution, to promote the fast of desulfurizing byproduct
Speed oxidation；
(3) a kind of flue gas desulfurization byproduct low-temperature oxidation device of the invention is provided with blade on agitation grinding blade and falls
Angle, blade chamfering promotes the gap that desulfurizing byproduct particle enters between arc ground section and blade chamfering, to promote
The mechanical lapping of desulfurizing byproduct particle；
(4) a kind of flue gas desulfurization byproduct low-temperature oxidation device of the invention, motor driving shaft bottom is provided with drive shaft
Top blast stomata, oxygen-enriched air can be equally blown into grinding oxidation chamber by drive shaft top blast stomata during grinding oxidation, be driven
Under the collective effect of moving axis top blast stomata and bottom blowing stomata, desulfurizing byproduct particle and liquid are constantly by grinding oxidation chamber
Center movement promotes desulfurizing byproduct particle that mechanical grinding occurs in arc ground section to the arc ground section for grinding oxidation chamber
Mill, to accelerate the oxidation effectiveness of desulfurizing byproduct particle；
(5) a kind of flue gas desulfurization byproduct low-temperature oxidation device of the invention, in milling gap section on be provided with gap section
Gas hole, gap section gas hole are blown into oxygen-enriched air to grinding oxidation chamber simultaneously, and the air blowing flow of gap section gas hole is small
In the air blowing flow of bottom blowing stomata, prevent desulfurizing byproduct particle too long in the milling gap section residence time, to promote desulfurization
Particle oxidation and grinding.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of flue gas desulfurization byproduct low-temperature oxidation device of the invention；
Fig. 2 is a kind of schematic diagram of the agitation grinding unit of flue gas desulfurization byproduct low-temperature oxidation device of the invention；
Fig. 3 is the elevational schematic view of agitation grinding unit of the invention；
Fig. 4 is a schematic structural view of Embodiment 4 of the present invention；
Fig. 5 is a schematic structural view of Embodiment 5 of the present invention；
Fig. 6 is a schematic structural view of Embodiment 6 of the present invention；
Fig. 7 is the scanning electron microscopic picture of calcium sulfate crystal whiskers prepared by the embodiment of the present invention 1.
Label declaration in schematic diagram:
100, oxidation unit；110, air blowing component is aoxidized；111, bottom blowing stomata；120, cone-shaped collection storehouse；130, oxygen is ground
Change cavity；131, arc ground section；132, milling gap section；133, gap section gas hole；140, heating water bath case；
200, agitation grinding unit；210, driving motor；220, motor driving shaft；221, drive shaft top blast stomata；230,
Blade connecting rod；231, connecting rod top blast stomata；232, connecting rod horizontal air hole；240, agitation grinding blade；241, blade falls
Angle；242, blade grinds circular arc.
Specific embodiment
Hereafter to the detailed description of exemplary embodiment of the present invention with reference to attached drawing, which forms one of description
Point, it has been shown as example enforceable exemplary embodiment of the invention in the figure.Although these exemplary embodiment quilts
Sufficiently describe in detail so that those skilled in the art can implement the present invention, it is to be understood that can realize other embodiments and
Can without departing from the spirit and scope of the present invention to the present invention various changes can be made.Hereafter to the embodiment of the present invention
More detailed description is not limited to required the scope of the present invention, and just to be illustrated and do not limit pair
The description of the features of the present invention and feature to propose to execute best mode of the invention, and is sufficient to make those skilled in the art
It can implement the present invention.Therefore, the scope of the invention is only defined by the appended claims.
Hereafter detailed description of the present invention and example embodiment are more fully understood in combination with attached drawing, wherein of the invention
Element and feature are identified by appended drawing reference.
Embodiment 1
The oxidation unit of the present embodiment includes oxidation unit 100 and agitation grinding unit 200, and wherein oxidation unit 100 wraps
Oxidation air blowing component 110, cone-shaped collection storehouse 120 and grinding oxidation chamber 130 are included, wherein oxidation air blowing component 110 is located at grinding
The lower part of oxidation chamber 130, oxidation air blowing component 110 are used to blast oxygen-enriched air to grinding oxidation chamber 130, aoxidize air blowing portion
4-8 layers of Ceramic Balls, preferably 5 layers are laid in part 110, Ceramic Balls promote being uniformly distributed for oxygen-enriched air；Grind oxidation chamber
130 are made of arc ground section 131 and milling gap section 132；Above-mentioned cone-shaped collection storehouse 120 is back taper, aoxidizes air blowing portion
Part 110 is connected by cone-shaped collection storehouse 120 with grinding oxidation chamber 130.Bottom blowing stomata is provided in oxidation air blowing component 110
111, bottom blowing stomata 111 is used to be blown into oxygen-enriched air into grinding oxidation chamber 130.
After oxidation unit is added in desulfurizing byproduct solution, desulfurizing byproduct sinks down into bottom under the effect of gravity, due to
Cone-shaped collection storehouse 120 is back taper, and desulfurizing byproduct particle ash is automatically gathered in cone-shaped collection storehouse 120 under the effect of gravity
In, oxygen-enriched air is blown into oxidation unit by oxidation air blowing component 110, under the driving of oxygen-enriched air, is deposited on cone-shaped collection storehouse
120 desulfurizing byproduct particle moves in the grinding oxidation chamber 130 at the top of oxidation unit, revolves in agitation grinding blade 240
Under the action of turning stirring, desulfurizing byproduct particle moves to the inner wall edge position of grinding oxidation chamber 130 and oxidation occurs instead
It answers, is gathered in once more in the cone-shaped collection storehouse 120 of lower part under the effect of gravity after the oxidation of partial desulfurization byproduct particles, lower part
Oxidation air blowing component 110 desulfurizing byproduct particle is blown afloat again, to promote the fully oxidized of desulfurizing byproduct particle.
The agitation grinding unit 200 of the present embodiment includes motor driving shaft 220, blade connecting rod 230, driving motor 210
With agitation grinding blade 240, agitation grinding blade 240 is provided on the driving motor 210, specific description is: driving
Motor 210 is connected by motor driving shaft 220 with blade connecting rod 230, and blade connecting rod 230 is located under motor driving shaft 220
Portion is provided with agitation grinding blade 240 in the blade connecting rod 230, and agitation grinding blade 240 can be with motor driving shaft 220
Center of rotation rotation, the provided circumferentially about of the agitation grinding blade 240 have blade to grind circular arc 242；Above-mentioned agitation grinding leaf
Piece 240 is located in grinding oxidation chamber 130, and the blade grinding circular arc 242 and arc ground section 131 of agitation grinding blade 240
It matches, grinding movement occurs in the driving inferior lobe slice lapping circular arc 242 and arc ground section 131 of driving motor 210.
It grinds in oxidation process, the calcium sulfite of particle surface is first anti-with oxygen during desulfurizing byproduct particle aoxidizes
Calcium sulfate should be generated, since calcium sulfate is slightly soluble in aqueous solution, calcium sulfite oxidation is attached to particle surface after generating calcium sulfate, hinders
Oxygen molecule is stopped to the diffusion mass transfer inside desulfurizing byproduct particle, to hinder the abundant of the calcium sulfite inside particle
Oxidation；When desulfurizing byproduct particle moves to arc ground section 131, the inner wall and agitation grinding blade of oxidation chamber 130 are ground
Extrusion and collision occurs for 240 blade grinding circular arc 242, and desulfurizing byproduct particle is ground in the inner wall of arc ground section 131 with blade
Under the extruding of rounding arc 242, collision effect, the indissoluble object of desulfurizing byproduct particle surface is ground into removal, i.e., will be attached to de-
The calcium sulfate on sulphur byproduct particles surface is removed under the action of mechanical force is ground, so that the calcium sulfite inside particle
It is exposed to particle surface, promotes the contact of oxygen molecule with calcium sulfite surface, to accelerate and promote inside particle
The oxidation of calcium sulfite.During desulfurizing byproduct is in grinding always, then due to grinding during agitation grinding blade
Gap between 240 and grinding 130 inner wall of oxidation chamber is smaller, and the bubble of oxygen-enriched air is difficult to enter stirring and grinds in process of lapping
It grinds blade 240 and grinds among the gap between 130 inner wall of oxidation chamber, so that during the grinding process, desulfurizing byproduct particle
It is difficult to that oxidation reaction occurs in conjunction with oxygen.Desulfurizing byproduct particle after grinding grinds circular arc in milling gap section 132 and blade
Internal calcium sulfite oxidation is calcium sulfate by 242 separation, oxygen-enriched air, and then desulfurizing byproduct particle moves to arc again
Regrinding, oxidation occur when ground section 131.The interval grinding of the proposition of inventor's innovation substantially increases the oxygen of oxidation process
Change efficiency, i.e., will be attached to oxide surface calcium sulfate grinding removal after, desulfurizing byproduct particle as early as possible with agitation grinding leaf
Piece 240 separates, to promote contact of the desulfurizing byproduct particle with oxygen, accelerates oxidation efficiency.
The arc ground section 131 of the present embodiment is equal to arc ground section at a distance from 240 center of rotation of agitation grinding blade
131 at a distance from 240 center of rotation of agitation grinding blade, which is the axle center of motor driving shaft 220, and arc is ground
The arc radius for grinding section 131 is identical as the blade grinding arc radius of circular arc 242, and the milling gap section 132 is ground with stirring
The distance for grinding 240 center of rotation of blade is greater than arc ground section 131 at a distance from 240 center of rotation of agitation grinding blade.
The cross section that oxidation chamber 130 is ground in this implementation is ellipse, is arc at the minor axis vertex of the ellipse
Shape ground section 131, agitation grinding blade 240 and grinding 130 joint of oxidation chamber, blade are ground at the minor axis vertex of ellipse
Relative motion occurs for rounding arc 242 and arc ground section 131, and generates extruding force to desulfurizing byproduct particle, by desulfurization by-product
Composition granule attrition crushing, blade grinding circular arc 242, which leaves, enters milling gap section 132 at oval minor axis vertex, at this time
Desulfurizing byproduct particle is separated with blade grinding circular arc 242, and oxidation reaction occurs.
Using a kind of flue gas desulfurization byproduct low-temperature oxidation device of the invention, air blowing oxidation desulfurizing byproduct, to desulfurization
By-product carries out oxidation modification processing, and specific step is as follows:
Firstly, the round-hole mesh using 100 mesh carries out water sieve to desulfurizing byproduct, and the impurity of bulky grain is removed, will be taken off
Sulfuric acid is added after sulphur by-product impurity elimination and carries out pickling, pickling solution is filtered by vacuum to obtain desulfurizing byproduct particle, to desulfurization
Byproduct particles carry out washing 2-4 times, the present embodiment preferably 3 times, and the desulfurizing byproduct solution being in neutrality；It is wherein described
Desulfurizing byproduct be Ore Sintering Process in the desulfurizing byproduct of sintering flue gas dry desulfurization or semi-dry desulphurization, it is water washed
Water in journey is deionized water.
Secondly, oxidation unit is added in desulfurizing byproduct solution, oxygen-enriched air progress is blown into desulfurizing byproduct solution
Air blowing oxidation carries out interval grinding to desulfurizing byproduct particle during air blowing oxidation, and controls desulfurizing byproduct solution
Oxidizing temperature is 90 DEG C；More specifically, steps are as follows for air blowing oxidation:
A, desulfurizing byproduct solution is added among oxidation unit, desulfurizing byproduct sinks down into bottom under the effect of gravity
In cone-shaped collection storehouse 120；
B, oxygen-enriched air is blown into oxidation unit by oxidation air blowing component 110, under the driving of oxygen-enriched air, is deposited on taper
The desulfurizing byproduct particle of collecting bin 120 moves in the grinding oxidation chamber 130 at the top of oxidation unit, in agitation grinding blade
Under the action of 240 Stirrings, desulfurizing byproduct particle moves to the inner wall edge position of grinding oxidation chamber 130；
C, interval grinding is carried out to desulfurizing byproduct particle in the inner wall edge of grinding oxidation chamber 130, be intermittently ground to
When desulfurizing byproduct particle moves to arc ground section 131, the inner wall and agitation grinding blade 240 of oxidation chamber 130 are ground
Blade grinds circular arc 242 and extrusion and collision occurs, and desulfurizing byproduct particle grinds circular arc in the inner wall and blade of arc ground section 131
Under 242 extruding, collision effect, the indissoluble object of desulfurizing byproduct particle surface is ground into removal, the desulfurizing byproduct after grinding
Particle is separated in milling gap section 132 with blade grinding circular arc 242, and internal calcium sulfite oxidation is sulfuric acid by oxygen-enriched air
Regrinding, oxidation occur when then desulfurizing byproduct particle moves to arc ground section 131 again for calcium.Wherein oxygen-enriched air
Temperature be 150 ± 5 DEG C, 150 ± 5 DEG C of oxidizing gas be grinding oxidation chamber 130 in desulfurizing byproduct solution added
Heat, the oxygen volume ratio in oxygen-enriched air are 60%.
The oxygenation efficiency of 1 desulfurizing byproduct of table
| Sample ID | SO3 2-Oxygenation efficiency |
| The prior art | 40.20% |
| Embodiment 1 | 78.52% |
During resource utilization desulfurizing byproduct prepares calcium sulfate crystal whiskers, calcium sulfite cannot be directly utilized
(CaSO3) calcium sulfate crystal whiskers are prepared, therefore processing is being modified using desulfurizing byproduct, wherein the modification is pair
Desulfurizing byproduct is modified oxidation processes, so that the calcium sulfite (CaSO in desulfurizing byproduct3) it is converted into calcium sulfate
(CaSO4).As shown in table 1, existing method for oxidation is in oxidation modification desulfurizing byproduct, SO3 2-Oxygenation efficiency be only
40.20%, cause SO3 2-Oxygenation efficiency it is lower, and cause the utilization efficiency of desulfurizing byproduct poor；And use the present embodiment
The indissoluble object of desulfurizing byproduct particle surface is ground removal by carrying out interval grinding during oxidation by oxidation unit,
The calcium sulfate that desulfurizing byproduct particle surface will be attached to is removed under the action of mechanical force grinding, so that in particle
The calcium sulfite in portion is exposed to particle surface, promotes the contact of oxygen molecule with calcium sulfite surface, to accelerate and promote
The oxidation of calcium sulfite inside particle, and the oxygenation efficiency of calcium sulfate in desulfurizing byproduct is substantially increased, so that SO3 2-'s
Oxygenation efficiency reaches 78.52%.
Using a kind of flue gas desulfurization byproduct low-temperature oxidation device to desulfurizing byproduct air blowing oxidation after, then by desulfurization pair
Reaction mixture is dried to obtain desulfurizing byproduct powder, adds after desulfurizing byproduct powder is mixed with medium crystallization agent into mixture
Enter water, and controlling solid-to-liquid ratio is 1/8；It is 5.0 that dilute sulfuric acid, which is added, and adjusts PH, and stirring makes its fully emulsified obtained slurry；
Slurry obtained above is added in reaction kettle, carries out lower reaction 120min under confined conditions at 140 ± 5 DEG C,
And obtain reaction product；Mixing speed when hydro-thermal reaction is 15-25r/min, preferably 20r/min.
Reaction product is washed 1-3 times, preferably 2 times, during washing, the water temperature for washing is 90 DEG C, is filtered
To filter cake, filter cake is cleaned using dehydrated alcohol after obtaining filter cake, so that fat-soluble impurity be removed；Filter cake is placed in again dry
Dry in dry case, wherein the drying temperature of drying box is 90 DEG C, dry to complete to obtain CaSO4Whisker, the whisker being prepared is such as
Shown in Fig. 7.
Using the present apparatus to desulfurizing byproduct oxidation modification processing after, the whisker that is prepared is as shown in fig. 7, wherein whisker
Diameter is less than 1 μm, and draw ratio reaches 80, and the theoretical strength of the intensity of calcium sulfate crystal whiskers reaches 0.02E-0.05E, shows finish
It is higher, the preparation quality of calcium sulfate crystal whiskers is improved, industrial application requirement is met, the high added value for realizing desulfurizing byproduct is answered
With.
Embodiment 2
The basic content of the present embodiment with embodiment 1, the difference is that: be provided with blade on agitation grinding blade 240
Chamfering 241, during grinding oxidation, under the driving of agitation grinding blade 240, desulfurizing byproduct particle moves to arc and grinds
Grind the gap between section 131 and blade chamfering 241, in subsequent motion process, desulfurizing byproduct particle continues to move to arc
Between ground section 131 and blade grinding circular arc 242, then desulfurizing byproduct particle carries out mechanical lapping, and blade chamfering 241 promotes
Desulfurizing byproduct particle enters the gap between arc ground section 131 and blade chamfering 241, to promote desulfurizing byproduct
The mechanical lapping of particle.
Embodiment 3
The basic content of the present embodiment with embodiment 1, the difference is that: 220 bottom of motor driving shaft is provided with driving
Axis top blast stomata 221 (as shown in Figure 3), drive shaft top blast stomata 221 equally can be by oxygen-enriched air during grinding oxidation
It is blown into grinding oxidation chamber 130, and the geometric center of drive shaft top blast stomata 221 and bottom blowing stomata 111 is located at same axis
On, under the collective effect of drive shaft top blast stomata 221 and bottom blowing stomata 111, desulfurizing byproduct particle and liquid are constantly by grinding
The center movement of oxidation chamber 130 is ground to the arc ground section 131 for grinding oxidation chamber 130, promotes desulfurizing byproduct particle
Mechanical lapping occurs in arc ground section 131, to accelerate the oxidation effectiveness of desulfurizing byproduct particle.
It is worth further illustrating, the bottom of blade connecting rod 230 is provided with connecting rod top blast stomata 231, the connection
Bar top blast 231 blowing directions of stomata are downward, i.e., air-flow from top to bottom enters desulfurizing byproduct solution (as shown in Figure 2)；In addition, leaf
Connecting rod horizontal air hole 232 is provided on the side of piece connecting rod 230, the outgassing direction of the connecting rod horizontal air hole 232 is parallel
In horizontal plane, the oxygen-enriched air that connecting rod horizontal air hole 232 sprays into not only promotes desulfurizing byproduct particle and oxygen molecule
Mixing, and desulfurizing byproduct particle is promoted, to the marginal position for grinding oxidation chamber 130, to accelerate desulfurization with water flow movement
The grinding of byproduct particles, oxidation process.
Embodiment 4
As shown in figure 4, the basic content of the present embodiment is with embodiment 1, and the difference is that: the present embodiment grinds oxidation chamber
Body 130 is made of 2 arc ground section 131 and 2 milling gap sections 132, and wherein milling gap section 132 is rectangle channel-shaped.
Embodiment 5
As shown in figure 5, the basic content of the present embodiment is with embodiment 1, and the difference is that: the present embodiment grinds oxidation chamber
Body 130 is made of 4 arc ground section 131 and 4 milling gap sections 132, and wherein milling gap section 132 is rectangle channel-shaped, and
Gap section gas hole 133 is provided in milling gap section 132, gap section gas hole 133 is blown simultaneously to grinding oxidation chamber 130
Enter oxygen-enriched air, the air blowing flow of gap section gas hole 133 is less than the air blowing flow of bottom blowing stomata 111；Prevent desulfurizing byproduct
Particle is too long in 132 residence time of milling gap section, so that desulfurization particle be promoted to aoxidize and grind.
Embodiment 6
As shown in fig. 6, the basic content of the present embodiment is with embodiment 1, and the difference is that: the grinding oxidation of the present embodiment
Heating water bath case 140 is provided with outside cavity 130, which is used to add for the grinding progress water-bath of oxidation chamber 130
Heat.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case where from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described herein.In addition, Development Status and meaning that background technique is intended in order to illustrate this technology,
It is not intended to limit the present invention or the application and application field of the invention.
More specifically, although exemplary embodiment of the present invention has been described herein, the invention is not limited to
These embodiments, but including those skilled in the art according to front detailed description it can be appreciated that it is modified, omit,
Any and whole embodiments of (such as between each embodiment) combination, adaptive change and/or replacement.In claim
It limits the language according to used in claim and is widely explained, and be not limited in foregoing detailed description or in reality
The example described during this application is applied, these examples should be considered as nonexcludability.For example, in the present invention, term is " preferably
Ground " be not it is exclusive, here it means that " preferably, but be not restricted to that ".It is in office where method or process claims
In any step for enumerating can execute in any order and be not limited to the sequence proposed in claim.Therefore, of the invention
Range should only be determined by appended claims and its legal equivalents, rather than by descriptions and examples given above Lai
It determines.
Claims (9)
1. a kind of flue gas desulfurization byproduct low-temperature oxidation device, it is characterised in that: including
Oxidation unit (100), the oxidation unit (100) include oxidation air blowing component (110) and grind oxidation chamber (130),
Middle oxidation air blowing component (110) is located at the lower part of grinding oxidation chamber (130), and oxidation air blowing component (110) is used for grinding oxygen
Change cavity (130) and blast oxygen-enriched air, the grinding oxidation chamber (130) is by arc ground section (131) and milling gap section
(132) it forms；
Agitation grinding unit (200), the agitation grinding unit (200) include driving motor (210) and agitation grinding blade
(240), agitation grinding blade (240) are provided on the driving motor (210), the circumference of the agitation grinding blade (240)
On be provided with blade grinding circular arc (242)；
Above-mentioned agitation grinding blade (240) is located in grinding oxidation chamber (130), and the blade of agitation grinding blade (240)
Grinding circular arc (242) is matched with arc ground section (131), in the driving inferior lobe slice lapping circular arc (242) of driving motor (210)
Grinding movement occurs with arc ground section (131).
2. a kind of flue gas desulfurization byproduct low-temperature oxidation device according to claim 1, it is characterised in that: the grinding
Gap section (132) is greater than arc ground section (131) and agitation grinding blade at a distance from agitation grinding blade (240) center of rotation
(240) distance of center of rotation.
3. a kind of flue gas desulfurization byproduct low-temperature oxidation device according to claim 2, it is characterised in that: the grinding
The cross section of oxidation chamber (130) is ellipse, is arc ground section (131) at the minor axis vertex of the ellipse.
4. a kind of flue gas desulfurization byproduct low-temperature oxidation device according to claim 3, it is characterised in that: the oxidation
Unit (100) further includes cone-shaped collection storehouse (120), which is back taper, the oxidation air blowing component
(110) it is connected by cone-shaped collection storehouse (120) with grinding oxidation chamber (130).
5. a kind of flue gas desulfurization byproduct low-temperature oxidation device according to claim 3, it is characterised in that: the stirring
Grinding unit (200) further includes motor driving shaft (220) and blade connecting rod (230), and the driving motor (210) passes through electricity
Machine drive shaft (220) is connected with blade connecting rod (230), is provided with agitation grinding blade in the blade connecting rod (230)
(240)。
6. a kind of flue gas desulfurization byproduct low-temperature oxidation device according to claim 5, it is characterised in that: the motor
The bottom of drive shaft (220) is provided with drive shaft top blast stomata (221).
7. a kind of flue gas desulfurization byproduct low-temperature oxidation device according to claim 1-6, it is characterised in that: institute
Blade chamfering (241) are provided on the agitation grinding blade (240) stated.
8. a kind of flue gas desulfurization byproduct low-temperature oxidation device according to claim 7, it is characterised in that: the oxidation
Ceramic Balls are laid in air blowing component (110).
9. a kind of flue gas desulfurization byproduct low-temperature oxidation device according to claim 8, it is characterised in that: the grinding
Heating water bath case (140) are provided with outside oxidation chamber (130).
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| CN201611068288.1A CN106477617B (en) | 2016-11-29 | 2016-11-29 | A kind of flue gas desulfurization byproduct low-temperature oxidation device |
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| CN201611068288.1A CN106477617B (en) | 2016-11-29 | 2016-11-29 | A kind of flue gas desulfurization byproduct low-temperature oxidation device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269784A (en) * | 2010-10-26 | 2013-08-28 | 安东尼奥·阿尔诺·维拉诺瓦 | Granulation by agglomeration of ceramic compositions ground in dry phase |
| CN103495469A (en) * | 2013-09-05 | 2014-01-08 | 大连卓远重工有限公司 | Coal pulverizer |
| CN206278930U (en) * | 2016-11-29 | 2017-06-27 | 安徽工业大学 | A kind of flue gas desulfurization byproduct low-temperature oxidation device |
-
2016
- 2016-11-29 CN CN201611068288.1A patent/CN106477617B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269784A (en) * | 2010-10-26 | 2013-08-28 | 安东尼奥·阿尔诺·维拉诺瓦 | Granulation by agglomeration of ceramic compositions ground in dry phase |
| CN103495469A (en) * | 2013-09-05 | 2014-01-08 | 大连卓远重工有限公司 | Coal pulverizer |
| CN206278930U (en) * | 2016-11-29 | 2017-06-27 | 安徽工业大学 | A kind of flue gas desulfurization byproduct low-temperature oxidation device |
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