CN105665408A - Method for treating incineration fly ash containing harmful heavy metals - Google Patents
Method for treating incineration fly ash containing harmful heavy metals Download PDFInfo
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- CN105665408A CN105665408A CN201410657471.XA CN201410657471A CN105665408A CN 105665408 A CN105665408 A CN 105665408A CN 201410657471 A CN201410657471 A CN 201410657471A CN 105665408 A CN105665408 A CN 105665408A
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- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000010881 fly ash Substances 0.000 title abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000006004 Quartz sand Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 238000003672 processing method Methods 0.000 claims description 23
- 239000007787 solid Substances 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000010453 quartz Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 52
- 230000000694 effects Effects 0.000 description 11
- 239000002245 particle Substances 0.000 description 9
- 238000012545 processing Methods 0.000 description 8
- 230000006641 stabilisation Effects 0.000 description 7
- 239000011575 calcium Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 229910052906 cristobalite Inorganic materials 0.000 description 3
- 239000004503 fine granule Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- -1 aluminium (Al) Chemical class 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000006298 dechlorination reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000007922 dissolution test Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 231100000693 bioaccumulation Toxicity 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A method for treating incineration fly ash containing harmful heavy metals comprises the following steps: (a) adding water into incineration fly ash containing harmful heavy metals, heating to 50-80 ℃, mixing and stirring, adding quartz sand in the stirring process, simultaneously utilizing an ultrasonic generator to transmit ultrasonic waves with the power of 150-300 watts, and controlling the action time to be 2.5-10 minutes to form solid-liquid ore pulp; (b) and (3) sending the solid-liquid ore pulp into a wet type vortex cone classifying and screening machine by using a pressure pump to separate harmful heavy metals. Thereby removing harmful heavy metals and improving the applicability of resource recycling of incineration fly ash.
Description
Technical field
The present invention relates to a kind of flyash treatment method, particularly relate to a kind of harmful heavy metal that contains and burnChange the processing method of flying dust.
Background technology
General discarded object after incineration process, the flying dust producing contain calcium (Ca), silicon (Si),The metal oxides such as aluminium (Al), iron (Fe), salt (villaumite) and as cadmium (Cd), chromium (Cr), mercury(Hg), the harmful heavy metal such as copper (Cu) and plumbous (Pb), therefore, must advanced line stabilization or nothingEvilization just can be carried out resource reutilization or final disposal after processing.
Existing incinerated flying ash is mainly with curing (solidification), stabilisation(stabilization) carry out intermediate treatment. Solidify way, current common fixing, the bag that comprisesEnvelope (encapsulation) and vitrifying (vitrification) with curing agent are for example fixedlyCement, sodium metasilicate, lime or clay etc. add in bazardous waste incinerated flying ash and form solidLump material, makes harmful substance be difficult for stripping. At present incinerated flying ash mostly using add cement asSolidify and process. Though solidify process have easy and simple to handle, setup fee is cheap, without exhaust-gas treatment problemAdvantage, but solidify after volume increase by 15 to 20%, weight increase by 40 to 50%, and waveTake curing agent and natural resources, again must subregion bury to process to reduce and bury the time limit, incinerate and fly simultaneouslyIn ash, contain high concentration chloride, affect the durability of firming body, place for a long time heavy metal and still have moltenThe doubt going out. And seal be by coated bazardous waste wherein so that harmful substance with extraneous everyFrom. But because its coated cost is high, cause disposal cost too high, be used so less. ExtremelyBe the processing method for inorganic bazardous waste matter in vitrified rule of doing, will be harmful to discardedThing drops in smelting furnace spends high temperature by bazardous waste melting with Celsius 1400, or sintering or interpolationAppropriate aluminium oxide, to be melt into glass ceramics, to reach stabilization, minimizing and subtracts appearanceization. This processingObject is wider, and compression strength is larger, and made glass, pottery can be compared with tool recycle values.But because high basicity makes single melt process limited, setup cost and Operation and Maintenance take all and belong toVery expensive.
In addition, stabilization processes way is to add adsorbent or chelating agent or chemical stabilizer to have madeHarmful substances reaction becomes stable material and no longer changes, to reach the order that no longer produces nuisance. But its advantage and shortcoming are identical with advantage and the shortcoming of above-mentioned curing processing way.
Thereby then there are many Patent Cases open, announce No. I311494 as TaiWan, China and " discardThing incinerates the method for heavy metal of fly ash derived removal " patent of invention case is to utilize original flying dustWith react flying dust and be applicable to mixed proportion, then add 4 to 8 times of running water that mix flying dust weight orDistilled water, carries out being fully uniformly mixed or oscillation extraction for 10 to 24 hours, and reaches flying dust weightThe object of metal removal. But it is pending that its washing treatment fluid has, and do not disclose Separation of Solid and Liquid and flyDetailed processing way and the improvement of ash and waste liquid.
And for example TaiWan, China is announced " processing method of incinerated flying ash and device " No. I257330Patent of invention case is first incinerated flying ash to be imposed to washing dechlorination to carry out force feed through hermetic type pump again.But do not disclose and how to eliminate heavy metal.
For another example No. 407067 " refuse processing method " patent of invention case of TaiWan, China bulletin,Be in discarded object, to add the stirring of vibrating of waterglass and water, the lead in discarded object is formed to siliconLead plumbate precipitation, makes plumbous stabilization, and reaches the object of stabilisation harmful heavy metal lead, but thisInvention is still just in conjunction with waterglass and water, and sodium silicate solution and water and heavy metal waste are mixedClose stir carry out maintenance solidify.
No. CN101725993rd, the applicant of the present invention China that also once application had also been got permission" containing the processing method of harmful heavy metal incinerated flying ash " patent of invention case, this case major technique spyLevy be every 100wt% containing add in the discarded object incinerated flying ash of harmful heavy metal 30 toThe quartz sand of 50wt% and water, mix and blend becomes solid-liquid ore pulp, and inserts the cone classification of wet type whirlpoolScreening machine separates. But because continuing research, inventor finds the disclosed technology spy of this caseLevy for the removal effect of harmful heavy metal attain in addition into space, so reintroduce the present invention.
Summary of the invention
The object of the present invention is to provide a kind of processing method containing harmful heavy metal incinerated flying ash,Not only can remove the solubility villaumite in flying dust, also can reach coarse grain footpath incinerated flying ash innoxious andResource, and can reduce the processing cost of fine grain incinerated flying ash, promote incinerated flying ash resource againThe applicability of utilizing.
The present invention, containing the processing method of harmful heavy metal incinerated flying ash, comprises the following step:
(a) containing adding water in harmful heavy metal incinerated flying ash, and be heated to 50 to 80 DEG C, andGive mix and blend washing a period of time, then add quartz sand and continue stirring, now utilize oneUltrasonic wave generator transmission power is the ultrasonic of 150 to 300 watts, and ultrasonic action time is controlledAt 2.5 to 10 minutes, to form solid-liquid ore pulp;
(b) utilize a compression pump by solid-liquid ore pulp send into wet type whirlpool cone classifying screen withSeparate harmful heavy metal.
The present invention is containing the processing method of harmful heavy metal incinerated flying ash, and the liquid-solid ratio of solid-liquid ore pulp is10：1。
The present invention is containing the processing method of harmful heavy metal incinerated flying ash, water, incinerated flying ash and quartzThe mixed proportion of sand is 30:2:1.
The present invention is containing the processing method of harmful heavy metal incinerated flying ash, water, incinerated flying ash and quartzThe mixed proportion of sand is 40:3:1.
The present invention, containing the processing method of harmful heavy metal incinerated flying ash, in step (a), stirsWashing time is at least 2.5 minutes.
The present invention is containing the processing method of harmful heavy metal incinerated flying ash, this compression pump be with 20 toThe pressure of 140 kPas is sent solid-liquid ore pulp into this wet type whirlpool cone classifying screen.
The present invention is containing the processing method of harmful heavy metal incinerated flying ash, and quartz sand is to be selected from amorphousSilica, quartz, squama silica, cristobalite or execute quartz.
Beneficial effect of the present invention is: screen in rotation by this wet type whirlpool cone classifying screenProcess in the effect of centrifugal force and gravity, collocation adds water and supersonic oscillation action, andCan large or fine granule be carried out to sorting according to the granularity of particle or density contrast, coarse granule sinks, thinParticle floating, effectively to separate harmful heavy metal, can wash away the solubility villaumite in flying dust simultaneously,Make villaumite meet standard, also can reach the innoxious and resource of coarse grain footpath incinerated flying ash, and energyReduce the processing cost of fine grain incinerated flying ash, promote being suitable for of incinerated flying ash resource recyclingProperty.
Brief description of the drawings
Fig. 1 is a method flow diagram, and the processing of the present invention containing harmful heavy metal incinerated flying ash is describedOne embodiment of method;
Fig. 2 is a schematic diagram, aid illustration Fig. 1;
Fig. 3 is a graph of a relation, and liquid-solid ratio and the villaumite removal of solid-liquid ore pulp in this embodiment are describedThe relation of rate;
Fig. 4 is a graph of a relation, illustrates that the mixing time of solid-liquid ore pulp in this embodiment and villaumite goExcept the relation of rate;
Fig. 5 is a graph of a relation, illustrates that the blade of cone classifying screen in wet type whirlpool in this embodiment turnsThe relation of speed and villaumite clearance; And
Fig. 6 is a graph of a relation, and the pass of ultrasonic power and villaumite clearance in this embodiment is describedSystem.
Detailed description of the invention
Introducing before the steps flow chart of method of the present invention, the thing of the incinerated flying ash that gathers is first describedChange characteristic and dissolution characteristic, analyze incinerated flying ash moisture content, proportion, pH value, burning decrement,Salt density and toxicity characteristic dissolution test (TCLP), and the each particle diameter distribution of screening post analysisCumulative percent by weight and content of beary metal thereof are as follows:
The incinerated flying ash that embodiments of the invention use is to come from Southern Taiwan, china moneySource recovery factory, takes from the Semi-dry scrubber of this factory and the incineration of bag collector collection gained fliesAsh, it is that 1.28%, pH value is 12.08 that the instrumental analysis of this flying dust records moisture content, belongs to high-alkaliDegree material, proportion is 2.89g/cm3, unburned carbon 0.21%, activated carbon 11.73%, and as table 1Shown in, show in incinerated flying ash with calcium (Ca), chlorine (Cl), silicon (Si), potassium (K) and sodium (Na)Be main Deng element. Crystalline phase consists of CaClOH, Ca (OH)2、KCl、NaCl、SiO2、CaSO4、CaCO3。
Table 1
Consulting table 2, is the result of incinerated flying ash toxicity characteristic dissolution test (TCLP) again, by dividingAnalysing result can find, molten with Pb (34.08mg/l) and Zn (6.13mg/l) in incinerated flying ashGo out concentration higher, wherein the stripping concentration of Pb has exceeded the regulation limit value (5 of stripping toxicitymg/l)。
Table 2
Consult Fig. 1,2, the present invention is containing an enforcement of the processing method of harmful heavy metal incinerated flying ashExample, comprises the following step 11 and step 12.
In this step 11, be first adding water 23 containing in harmful heavy metal incinerated flying ash 21,And be heated to 50 to 80 DEG C, and carried out mix and blend washing, stir washing time at leastBe 2.5 minutes, so carry out dechlorination effect. Then add again quartz sand 22 and continue to stirMix, now utilize a ultrasonic wave generator transmission power is the ultrasonic of 150 to 300 watts simultaneously,Ultrasonic action time is controlled at 2.5 to 10 minutes, to form solid-liquid ore pulp 24. Say especiallyBright, the liquid-solid ratio of described solid-liquid ore pulp 24 is 10:1. In addition, water, incinerated flying ash andThe mixed proportion of quartz sand is 30:2:1, or 40:3:1, be in the present embodiment beforePerson explains. In addition, quartz sand 22 can be to be selected from amorphous silicas, quartz, squamaSilica, cristobalite or execute quartz.
Special instruction, the liquid-solid when mixing time of solid-liquid ore pulp 24 all can be produced villaumiteRaw impact, known as shown in Figure 3, can make more water-soluble villaumite molten although increase liquid-solid ratioSeparate, promote clearance, get rid of (seeing Fig. 2) but high liquid-solid ratio can produce a large amount of waste water 25,Improve load and the cost of wastewater treatment. Therefore, liquid-solid ratio with 15L/kg for better. And for exampleKnown shown in Fig. 4, when mixing time reaches more than 2.5 minutes, villaumite clearance there is no significantlyPromote, show that the stripping of villaumite should approach balance about 2.5 minutes.
Then, consult Fig. 1,2, in step 12, be utilize a compression pump 31 with 20 toThe pressure of 140 kPas (Pa) by solid-liquid ore pulp 24 send into a wet type whirlpool cone classifying screen 32 (In Fig. 3,4,5,6, be called for short FA) to separate harmful heavy metal.
Start this wet type whirlpool cone classifying screen 32, can make solid-liquid ore pulp 24 can be at centrifugal force andUnder the effect of gravity, screen according to granularity or the density contrast of particle, now large the and density of particleLarge particle under the effect of centrifugal force and gravity, can be vertically downwards and radially to outward transportMoving, discharged by underflow opening (Underflow is called for short UF) 321, form outer whirlpool (Outer simultaneouslySpiral) flow field. The particle that particle is little and density is little moves to central axis, andCentral axis formation one interior whirlpool (Innerspiral) upwards, and by overfall(Overflow is called for short OF) 322, discharges and is collected, the effect separating to reach large or fine granule,Can wash away the villaumite of incinerated flying ash 21 middle and high concentrations, find through experimental result, villaumite goes simultaneouslyExcept rate can reach 94.17%, the chloride content of washing flying dust is reduced to 7000mg/kg. Thereby canMake villaumite meet standard, also can reach the innoxious and resource of coarse grain footpath incinerated flying ash, and can fallThe processing cost of low fine grain incinerated flying ash, promotes the suitable of incinerated flying ash 21 resource recyclingsThe property used.
Coordinate and consult shown in Fig. 5, find through experiment, this wet type whirlpool cone classifying screen 32The impact that blade rotational speed is removed for villaumite is not remarkable, can under the condition of rotating speed 500ppmObtain the highest villaumite clearance, and make the villaumite concentration in solid-liquid ore pulp 24 reach minimum.In addition, known as shown in Figure 6, the supersonic auxiliary villaumite clearance that can contribute to promote, andUltrasonic increased power, villaumite clearance also can improve, the two being proportionate property. Through experiment knotFruit is found, under supersonic assisting, under the liquid-solid ratio 15L/kg of solid-liquid ore pulp 24Reach with liquid-solid ratio 20L/kg and without the close villaumite clearance of the auxiliary washing of ultrasonic, thereforeMore can contribute to reduce water requirement by supersonic booster action.
Below further with the present invention of experimental example aid illustration, only limit to but do not mean the present inventionThe content disclosing in described example.
Experimental example 1
Coordinate and consult Fig. 2, get 10wt% incinerated flying ash 21, add 100wt% water 23 simultaneously, stirWashing in 10 minutes, the solid-liquid ore pulp 24 after washing again with whether add quartz sand 22 compare asTable 3, through more known, most of salt is all dissolved in liquid, in solid, only has a littleSalt, and be added with the solid-liquid ore pulp 24 of quartz sand 22, the salt loss in weight is more.
Table 3
Experimental example 2
Coordinate and consult Fig. 2, by incinerated flying ash 21 with have or not add quartz sand 22 and with water 23Mixed solid-liquid ore pulp 24, sends into wet type whirlpool cone classifying screen by compression pump 31 respectivelyIn 32, influent stream pressure with 20,80 and tri-kinds of different pressures of 140Kpa carry out sorting, particle is largeAnd the large particle of density is outwards mobile downwards along tube wall, is flowed out by underflow opening (UF) 321,Grain and the little particle of density move to central axis, form interior whirlpool upwards in central axis,Taking to overfall (OF) 322 by interior whirlpool discharges. Materialization after screening and dissolution characteristic, unitElement composition is respectively as shown in table 4, table 5, table 6 and table 7.
Table 4
In above-mentioned table 4, N.D. represents not measure. In addition, the content of plumbous (Pb) is in overflowMouth (OF) 322 and underflow opening (UF) 321 all still exceed regulation limit value.
Table 5
In above-mentioned table 5, N.D. represents not measure. In addition, sample point overfall (OF) 322The lead content of institute's sample thief is high compared with the lead content of 321 sample thieves of sample point underflow opening (UF), andThe solid lead content of 322 sample thieves of sample point overfall (OF) is higher, sample point underflow opening(UF) the solid lead content of 321 sample thieves is lower.
Table 6
In above-mentioned table 6, N.D. represents not measure. In addition, sample point overfall (OF) 322The lead content of institute's sample thief exceedes regulation limit value (5mg/l), and sample point underflow opening (UF) 321Coincidence method restrictions value of the lead content of institute's sample thief. Obviously adding quartz sand 22 contributes to weightMetal enrichment is in overfall (OF) 322.
Table 7
In above-mentioned table 7, N.D. represents not measure. Analysis result by above-mentioned table 7 is passableFind, the Pb content (1.42mg/g) of 322 sample thieves of sample point overfall (OF) is obviously largeIn the Pb content (0.49mg/g) of 321 sample thieves of sample point underflow opening (UF), further withTable 5 result finds there is the cone sorting of the quartz sand whirlpool of interpolation in sample point overfall (OF) 322 more afterwardsPb content be greater than without the whirlpool cone sorting of adding quartz sand in sample point overfall (OF) 322 itPb content, shows that interpolation quartz sand can promote wet type whirlpool and bore the enrichment to heavy metal in incinerated flying ashEfficiency, to reach the innoxious object of incinerated flying ash.
Experimental example 3
Coordinate and consult Fig. 2, repeat experimental example 2, but only adopt incinerated flying ash 21 to be added with quartzThe solid-liquid ore pulp 24 of sand 22, taking incinerated flying ash 21 with the mixed proportion of quartz sand 22 as 2:1And 3:1 carries out respectively the cone screening of wet type whirlpool, for the impact of bioaccumulation efficiency, as table 8 and table 9Shown in.
Table 8
Table 9
In above-mentioned table 8,9, N.D. represents not measure. In addition, known as shown in Table 9,Along with the increase of influent stream pressure, the efficiency of wet type whirlpool cone screening enriching heavy metal is also along with increase.At input concentration percentage by weight 10wt%, influent stream pressure 140Kpa, incinerated flying ash 21 and stoneEnglish sand 22 mixed proportions are 2:1 while screening, concentration effect the best (in table 8), whirlpool coneIn the sample that overfall and bottom outlet gather, Pb stripping concentration be respectively 12.35mg/l and2.44mg/l. The situation that incinerated flying ash 21 is 3:1 with quartz sand 22 mixed proportions with mixRatio is that the situation of 2:1 is compared, though the former effect a little less than the latter's effect, but still belong toTolerance interval. If to reduce quartz sand 22 additions and to save the energy, reduce wet type merelyThe consideration that whirlpool cone classifying screen 32 weares and teares is that the principle can reach stripping concentration standard is enteredRow eliminate harmful heavy metal lead (Pb), taking in incinerated flying ash 21, add weight ratio as its 1/3Quartz sand 22 to 1/2 just can be reached the effect of enriched lead (Pb).
In sum, the processing method that the present invention contains harmful heavy metal incinerated flying ash is by above-mentioned stepRapid flow process, utilizes this wet type whirlpool cone classifying screen 32 centrifugal force in the process of rotation screeningAnd the effect of gravity, collocation adds water 23 and supersonic oscillation action, and can be according to particleGranularity or density contrast large or fine granule is carried out to sorting, coarse granule sinks, fine grained floating,Effectively to separate harmful heavy metal, can wash away the solubility villaumite in incinerated flying ash 21 simultaneously,Make villaumite meet standard, also can reach coarse grain footpath incinerated flying ash 21 innoxious and resources,And can reduce the processing cost of fine grain incinerated flying ash 21, promote incinerated flying ash 21 resources againThe applicability of utilizing.
Claims (7)
1. containing a processing method for harmful heavy metal incinerated flying ash, it is characterized in that: shouldProcessing method containing harmful heavy metal incinerated flying ash comprises:
(a) containing adding water in harmful heavy metal incinerated flying ash, and be heated to 50 to 80 DEG C, andGive mix and blend washing a period of time, then add quartz sand and continue stirring, now utilizeOne ultrasonic wave generator transmission power is the ultrasonic of 150 to 300 watts, ultrasonic action timeBe controlled at 2.5 to 10 minutes, to form solid-liquid ore pulp;
(b) utilize a compression pump that solid-liquid ore pulp is sent into a wet type whirlpool cone classifying screenTo separate harmful heavy metal.
2. the processing method containing harmful heavy metal incinerated flying ash according to claim 1,It is characterized in that: the liquid-solid ratio of solid-liquid ore pulp is 10:1.
3. the processing method containing harmful heavy metal incinerated flying ash according to claim 2,It is characterized in that: the mixed proportion of water, incinerated flying ash and quartz sand is 30:2:1.
4. the processing method containing harmful heavy metal incinerated flying ash according to claim 2,It is characterized in that: the mixed proportion of water, incinerated flying ash and quartz sand is 40:3:1.
5. according to burning containing harmful heavy metal described in arbitrary claim in claim 1 to 4The processing method of changing flying dust, is characterized in that: in step (a), stir washing time at leastIt is 2.5 minutes.
6. the processing method containing harmful heavy metal incinerated flying ash according to claim 5,It is characterized in that: this compression pump is with the pressure of 20 to 140 kPas, solid-liquid ore pulp to be sent into this to wetFormula whirlpool cone classifying screen.
7. the processing method containing harmful heavy metal incinerated flying ash according to claim 1,It is characterized in that: quartz sand is to be selected from amorphous silicas, quartz, squama silica, white siliconStone or execute quartz.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW103132431A TWI552811B (en) | 2014-09-19 | 2014-09-19 | Treatment of Harmful Heavy Metal Incineration Fly Ash |
| TW103132431 | 2014-09-19 |
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| CN105665408A true CN105665408A (en) | 2016-06-15 |
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| CN201410657471.XA Pending CN105665408A (en) | 2014-09-19 | 2014-11-18 | Method for treating incineration fly ash containing harmful heavy metals |
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| TW (1) | TWI552811B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167832A (en) * | 2020-01-03 | 2020-05-19 | 中南大学 | Solidification and stabilization method for heavy metal pollutants in fly ash |
| CN115141002A (en) * | 2022-06-08 | 2022-10-04 | 上海大学 | Method for fixing chlorine in household garbage incineration fly ash |
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| JPH03270777A (en) * | 1990-03-19 | 1991-12-02 | Hitachi Zosen Corp | Treatment of fly ash containing toxic substance |
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| CN101725993A (en) * | 2008-10-29 | 2010-06-09 | 映诚股份有限公司 | Method for treating incinerated fly ash with harmful heavy metals |
| CN103954493A (en) * | 2014-04-17 | 2014-07-30 | 广东电网公司电力科学研究院 | Separation and quantitative determination methods of carbon black particles and residual coke in fire coal fly ash |
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| TWI311494B (en) * | 2003-12-23 | 2009-07-01 | Chang Kuen Se | Technology for removing heavy metals from fly ash derived from the waste incinerator. |
| TW201017068A (en) * | 2008-10-24 | 2010-05-01 | Ying Cheng Environmental Technology Co Ltd | A process for fly ash contaminated with a hazardous material be clasificated |
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- 2014-11-18 CN CN201410657471.XA patent/CN105665408A/en active Pending
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| JPH03270777A (en) * | 1990-03-19 | 1991-12-02 | Hitachi Zosen Corp | Treatment of fly ash containing toxic substance |
| JP2006289189A (en) * | 2005-04-06 | 2006-10-26 | Jfe Plant & Service Corp | Flying ash treatment method and apparatus |
| CN101081397A (en) * | 2006-06-01 | 2007-12-05 | 宜兴市张泽浇注耐火材料厂 | Permanent innocent treatment method of city life rubbish, industrial refuse and incineration fly ash |
| CN101725993A (en) * | 2008-10-29 | 2010-06-09 | 映诚股份有限公司 | Method for treating incinerated fly ash with harmful heavy metals |
| CN103954493A (en) * | 2014-04-17 | 2014-07-30 | 广东电网公司电力科学研究院 | Separation and quantitative determination methods of carbon black particles and residual coke in fire coal fly ash |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167832A (en) * | 2020-01-03 | 2020-05-19 | 中南大学 | Solidification and stabilization method for heavy metal pollutants in fly ash |
| CN111167832B (en) * | 2020-01-03 | 2021-01-15 | 中南大学 | Solidification and stabilization method for heavy metal pollutants in fly ash |
| CN115141002A (en) * | 2022-06-08 | 2022-10-04 | 上海大学 | Method for fixing chlorine in household garbage incineration fly ash |
| CN115141002B (en) * | 2022-06-08 | 2023-07-18 | 上海大学 | Method for fixing chlorine in fly ash generated by incineration of household garbage |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201611917A (en) | 2016-04-01 |
| TWI552811B (en) | 2016-10-11 |
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