CN106964637A - A kind of garbage flying ash and metallurgical dust recycling cleaning treatment technique - Google Patents
A kind of garbage flying ash and metallurgical dust recycling cleaning treatment technique Download PDFInfo
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- CN106964637A CN106964637A CN201710335453.3A CN201710335453A CN106964637A CN 106964637 A CN106964637 A CN 106964637A CN 201710335453 A CN201710335453 A CN 201710335453A CN 106964637 A CN106964637 A CN 106964637A
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- 239000000428 dust Substances 0.000 title claims abstract description 99
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000004064 recycling Methods 0.000 title claims abstract description 25
- 238000004140 cleaning Methods 0.000 title claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 44
- 238000001035 drying Methods 0.000 claims abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003546 flue gas Substances 0.000 claims abstract description 29
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 28
- 239000002912 waste gas Substances 0.000 claims abstract description 27
- 230000004087 circulation Effects 0.000 claims abstract description 8
- 239000002817 coal dust Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 30
- 229910052700 potassium Inorganic materials 0.000 claims description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 239000003500 flue dust Substances 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 229910052745 lead Inorganic materials 0.000 claims description 12
- 229910052708 sodium Inorganic materials 0.000 claims description 12
- 238000007605 air drying Methods 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 claims description 2
- 239000011324 bead Substances 0.000 abstract description 20
- 239000002918 waste heat Substances 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 47
- 235000019628 coolness Nutrition 0.000 description 34
- 239000011701 zinc Substances 0.000 description 24
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 9
- 238000005245 sintering Methods 0.000 description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- 239000000460 chlorine Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 230000003009 desulfurizing Effects 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000009851 ferrous metallurgy Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 206010013786 Dry skin Diseases 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 238000003837 high-temperature calcination Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000004059 degradation Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000024121 nodulation Effects 0.000 description 2
- 238000009856 non-ferrous metallurgy Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001360 synchronised Effects 0.000 description 2
- 231100000167 toxic agent Toxicity 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 210000000214 Mouth Anatomy 0.000 description 1
- 229910002089 NOx Inorganic materials 0.000 description 1
- 231100000614 Poison Toxicity 0.000 description 1
- 210000000538 Tail Anatomy 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000000593 degrading Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000003019 stabilising Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000002195 synergetic Effects 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B2101/00—Type of solid waste
- B09B2101/30—Incineration ashes
Abstract
The invention discloses a kind of garbage flying ash and metallurgical dust recycling cleaning treatment technique, the technique is by garbage flying ash, metallurgical dust, coal dust dispensing is mixed evenly to prepare bead, then Two stage dryer is used, one section of roasting, the technique of two-step cooling is handled it, I section is being dried by bead moisture removal, II section is being dried Jiang bioxin degraded and flying dust volatile matter removing, and dry waste gas is recycled to furnace zone, utilize the hot environment of furnace zone, further remove bioxin and volatile matter is burnt, bead is set to be consolidated into ore deposit in furnace zone, simultaneously by the K in garbage flying ash and metallurgical dust, Na, Pb, Zn etc. is evaporate into flue gas to be reclaimed to it.The waste gas circulation of I section of cooling makees thermal source to drying II section, and the waste gas circulation of II section of cooling makees thermal source to dry I section, not only makes full use of waste heat, and cause garbage flying ash to obtain recycling with metallurgical dust and clean utilization.
Description
Technical field
It is more particularly to a kind of dry by two sections the present invention relates to the technique that a kind of garbage flying ash cooperates with processing with metallurgical dust
The technique that dry, one section of roasting, two sections of coolings are combined realizes the technique of garbage flying ash and metallurgical dust recycling cleaning treatment, category
In Ferrous Metallurgy solid waste and waste incineration and generating electricity flying dust processing technology field.
Background technology
Incineration of refuse flyash is the thin particulate matter trapped in garbage burning factory flue gas purification system and heat recovery system, about
Account for the 3~5% of the amount of burning away the refuse.Flying ash contains the heavy metal contaminants and extremely toxic substance bioxin easily leached, according to China
The execution from 1 day of August in 2016《National Hazard waste register》It has been shown that, incineration of refuse flyash belongs to HW18 classes, is hazardous waste, right
Environment and human health risk are huge.At present, the main processing ways and its feature of incineration of refuse flyash：(1) cement solidification is filled out
Bury.Increase-volume is larger, occupies a large amount of land resources, Cr6+It is not effectively handled Deng still having leaching risk , bioxin to pollute；(2) it is chemical
Medicament stabilization technique.The stability of the stabilisation of various heavy relatively difficult to achieve, Dui bioxin and dissolving salt is weaker；(3) at heat
Reason technology.It is mainly at present cement kiln Synergistic treatment method, has a disadvantage in that the presence of Cl in flying dust easily produces corrosion to kiln body, together
When influence Cement Quality so that limiting cement uses scope, and individually high-temperature process then has that high energy consumption, investment are big etc. to ask
Topic.
Metallurgical dust especially Ferrous Metallurgy dust, is the higher solid waste of iron content mostly, can according to its source
It is divided into sintering dust, blast furnace dust, electric furnace/converter dust, nonferrous metallurgy ion dust mud contaning etc., at present, the metallurgical powder of steel plant's disposal
The main method of dirt is that sintering will be returned after dust collection, because the fluctuation of its chemical constituent is larger, during supplying sintering, easily causes sintering
Mineral amount is unstable, further, since many elements containing effumability in metallurgical dust, such as zinc, alkali metal etc. can be in blast furnaces not
Disconnected circulation collection, causes furnace nodulation, so as to constrain the scale processing of metallurgical dust, cause a large amount of dust can only fill or
Person stacks, and not only causes the waste of land resource, pollution is brought to environment, also results in valuable element in metallurgical dust
Waste.
The content of the invention
The problem of existing for garbage flying ash in the prior art and metallurgical dust processing procedure, the purpose of the present invention is to be
There is provided one kind garbage flying ash is cooperateed with into processing with metallurgical dust, by rationally design drying, high-temperature roasting, cooling, flue gas recirculation,
The flows such as bag-type dust, flue gas desulfurization and technical parameter, realize the recycling of garbage flying ash and metallurgical dust and clean
The technique of disposal.
In order to realize above-mentioned technical purpose, the invention provides a kind of garbage flying ash and metallurgical dust recycling cleaning treatment
Technique, the technique is by garbage flying ash, metallurgical dust and coal blending, pelletizing；Gained ball material sequentially passes through dry I sections, dry
II sections, furnace zone, I sections of cooling and cooling II segment process processing, obtain iron-containing charge and volatilization are reclaimed containing Pb, Zn, K and Na
Flue dust；Moisture in the dry I sections of removings ball material；Group in the middle part of the dry II sections of degradeds ball material including subpackage Han bioxin
Point, and the volatile organic component that volatilizees；Volatile organic component input furnace zone is originated as part of fuel；The furnace zone
Ball material is consolidated into ore deposit, degraded and the part for carrying out II sections of self-desiccation of burning containing the component including bioxin and volatile organic component,
And volatilization is reclaimed comprising the flue dust component including Pb, Zn, K and Na；Described I sections of cooling ball material of cooling, cool down I sections of waste gas circulations
Thermal source is used as to drying II sections；The further cooling ball material of II sections of cooling, cools down II sections of cooling waste gas circulations and makees to drying I sections
For thermal source.
In the prior art, during using high-temperature process garbage flying ash, because Cl contents are higher in garbage flying ash, it is easy to
To etching apparatus, and individually there is high energy consumption, investment in high-temperature process garbage flying ash.And metallurgical dust is due to chemical group
Partial wave moves larger, during supplying agglomeration for iron mine, easily causes sinter quality unstable, and metallurgical dust is easy containing such as zinc, alkali metal
Volatile element, meeting continuous circulation collection in blast furnace, causes furnace nodulation, so as to constrain at the scale of metallurgical dust
Reason.Technical scheme is dexterously by two kinds of industrial dust integrated treatments, using the chlorine in garbage flying ash by metallurgical dust
In the chloridizing volatilization such as K, Na, Pb and Zn reclaim, not only eliminate the content of poisonous metal in metallurgical dust, obtain qualified contain
Iron furnace material, while also solving the problem of chlorine is to equipment corrosion in flying dust.Simultaneously using the CaO included in garbage flying ash into being allocated as
For the binding agent of metallurgical dust, without outer adding additives in roasting process, effective consolidation of garbage flying ash and metallurgical dust is realized,
The qualified iron-containing charge of generation.In addition, the harmful components such as garbage flying ash Zhong bioxin are effectively split in high-temperature calcination process
Solution, reduces the harm to environment.
Technical scheme rationally devises the technique of Two stage dryer, one section of roasting and two sections of coolings to handle rubbish
Flying dust and metallurgical dust raw material.Effective degraded of garbage flying ash Zhong bioxin is not only realized, and has effectively reclaimed metallurgical powder
The metallic elements such as K, Na, Pb and Zn in dirt, obtain qualified iron-smelting raw material, realize the recycling profit of two kinds of dust wastes
With；Meanwhile, by being recycled to high-temp waste gas, greatly reduce the energy consumption of whole technique.
It is preferred that scheme, I section of the drying is that exhausting is dried, and 80~150 DEG C of hot blast temperature dries 15~30min, gas
1.8~2.4m/s of flow velocity.Due to easily being burst at a temperature of 500 DEG C~600 DEG C when the higher ball material of water content, the present invention is preferentially adopted
With 100 DEG C or so of low temperature heated-air drying, by the drying process of ball material to appropriate water content, garbage flying ash bead effectively prevent
Because moisture evaporates rapidly cause bead to burst in II section of processing procedure in follow-up dry, cause to produce powder again exciting bioxin
Generation.Meanwhile, dried using exhausting, moisture is all discharged into system, is conducive to the recovery of dust in follow-up flue gas.
It is preferred that scheme, II section of the drying is forced air drying, and 500~600 DEG C of hot blast temperature dries 3~6min, gas
1.5~2.0m/s of flow velocity.II section of the drying of the present invention is mainly to organic matter degradation and volatilizations such as bioxin in ball material, at this
The organic matters such as most of bioxin can be degraded under optimum condition, can be so that bioxin to be degraded while by forced air drying
Composition and volatile organic component input furnace zone as fuel gas reclaim use.
It is preferred that scheme, the firing temperature of the furnace zone is 1050~1150 DEG C, 1~2min of the duration of ignition, in bottom
It is calcined under the conditions of exhausting, roasting maximum temperature is 1250~1300 DEG C, the time more than 1000 DEG C is 5~10min.Roasting
Section is sintered by using exhausting mode, in the presence of exhausting, and the height temperate zone that fuel combustion is produced progressively is expected from charge level to bottom
Layer transmission, improves the programming rate of roasting process, reduces the secondary generation probability of bioxin, while can make cigarette by exhausting
Gas is discharged in time, is conducive to the recovery of flue dust.
It is preferred that scheme, furnace zone flue gas is delivered to deduster by exhausting and reclaims comprising the cigarette including Pb, Zn, K and Na
Dirt.
It is preferred that scheme, the waste gas of I section of the cooling is delivered to dry II sections, and II sections are dried by converting cold wind control outside
Temperature is 500~600 DEG C.
It is preferred that scheme, the waste gas of II section of the cooling be delivered to it is dry I sections, by convert outside cold wind control dry I section it is warm
Spend for 80~150 DEG C.
It is preferred that scheme, the flue gas of the furnace zone collected comprising the flue dust group including Pb, Zn, K, Na using bag-type dust
Point.It is mainly the chlorate of these metals containing the flue dust component including Pb, Zn, K, Na.
It is preferred that scheme, the mass ratio of garbage flying ash, metallurgical dust and coal dust is 1 in the ball material:2~6:0.15~
0.3.Garbage flying ash and metallurgical dust are reasonably arranged in pairs or groups, and at utmost mutually can be entered using the component of two kinds of solid dusts
Row chemical reaction, such as using in garbage flying ash calcium oxide carry out bond realize be consolidated into ore deposit and utilize garbage flying ash in chlorine
Realize that Pb, Zn, K, Na etc. volatilize recovery in a chloride-form.
It is preferred that scheme, the particle diameter of the ball material is 8~16mm.
When the garbage flying ash of the present invention is using grate furnace incinerator or rotary kiln incineration garbage power, from waste heat boiler
Fine-grained solids discarded object obtained by trapping in dreg removing system, flue gas purification system and tails dedusting system.CaO in garbage flying ash
It is higher with chlorinity, it is not suitable for being used as production cement, while it contains the harmful components such as bioxin, general processing method is difficult
" to solve and do harm to " it.
The metallurgical dust of the present invention includes the blast furnace dust produced in steel manufacture process, gravitational dust, electric furnace dirt, converter
At least one of ion dust mud contaning that mud, sintering electric precipitation one or two electric field ash, environmental dust removal ash and Nonferrous Metallurgical Process are produced.This
A little metallurgical dusts are the iron content secondary resource for including the harmful elements such as K, Na, Pb, Zn, and it is poor to there is independent granulating efficiency, need
Outer adding additives, and be difficult to be used for agglomeration for iron mine directly as iron-smelting raw material.
The garbage flying ash of the present invention cleans disposing technique with metallurgical dust recycling, comprises the following steps：
1) by garbage flying ash, metallurgical dust and coal dust dispensing in mass ratio 1:2~6:After 0.15~0.3 mixes, 8 are made~
16mm bead, and by the uniform cloth of distributing device to chassis；
2) I sections of drying processes are dried, it is down-draft drying zone to dry I section, hot blast temperature is 80~150 DEG C, dry 15~
30min, gas flow rate is 1.8~2.4m/s, and drying I section can directly discharge ball material moisture removal, flue gas；
3) II sections of drying processes are dried, it is blasting drying period to dry II sections, hot blast temperature is 500~600 DEG C, dry 3~
6min, gas flow rate is 1.5~2.0m/s, dries II section and bioxin is degraded and flying dust volatile matter removing, and by dry waste gas
It is recycled to furnace zone；
4) sintering stage sintering process, lights a fire in the position for entering furnace zone to bead charge level, temperature 1050~1150
DEG C, 1~2min of the duration of ignition is sintered under the conditions of bottom drawing, control the maximum temperature of roasting process for 1250~
1300 DEG C, 5~10min of high-temperature time more than 1000 DEG C；Flying dust and metallurgical dust is set to be consolidated into ore deposit in furnace zone, while by original
Pb, Zn, K, Na in material etc. evaporate into flue gas and it are reclaimed, and reclaim the gas after flue dust and are discharged after desulfurizing tower desulfurization；
5) I section cooling techniques are cooled down, I sections of cooling for high temperature section hot waste gas, hot waste gas is evacuated to blower fan it is dry II sections, and
The petticoat pipe temperature for controlling to dry II sections by converting cold wind outside is 500~600 DEG C；
6) cool down II section of cooling technique, cooling II section be low temperature hot waste gas, this section of waste gas is evacuated to blower fan it is dry I sections,
And make to dry I sections of petticoat pipe temperature by converting cold wind outside for 80~150 DEG C.
Compared with the prior art, the beneficial effect that technical scheme is brought：
1) present invention handles garbage flying ash and the collaboration of Ferrous Metallurgy dust, makes not volatile metal in two kinds of dust
Material is efficiently cured in pyroprocess, the qualified iron-containing charge of generation quality, and during two volatile valuable metal elements
Efficiently volatilize and the utilization that is captured；Bioxin in flying dust is effectively degraded at high operating temperatures simultaneously, rubbish is realized and flies
Ash cooperates with the target of recycling with metallurgical dust.By complex chemical reaction between garbage flying ash and Ferrous Metallurgy dust, produce
Obvious synergy:1. the CaO in garbage flying ash can be needed additional viscous as a kind of binding agent when solving metallurgical dust granulation
The problem of tying agent；2. under hot conditions, garbage flying ash is effectively consolidated with metallurgical dust, generates qualified iron-containing charge；3. it is high
Under the conditions of temperature, the chlorine in garbage flying ash with metallurgical dust there is volatile heavy, alkali metal to be combined, and evaporates into flue gas, leads to
Cloth bag deduster can fully collect the high flue dust of valuable metal content, it is to avoid the wasting of resources；4. under hot conditions, rubbish flies
Dioxins extremely toxic substance is effectively decomposed in ash.
2) present invention devises the technique of rational Two stage dryer++ two sections of sintering cooling, not only realize garbage flying ash with
The normal sintering of metallurgical dust, and energy consumption is greatlyd save, be conducive to industrial applications.Specific advantage is as follows：(1) foundation contains
Fine grinding ash bead devises two-part drying process, by drying I section of low temperature drying in 500~600 DEG C of characteristics easily burst
Dehydration, it is ensured that flying dust bead dries unlikely explosion at follow-up 500~600 DEG C of higher temperature.Meanwhile, drying II section, a side
Face can be by most of bioxin degraded of flying dust, devolatilization, and temperature Zhi the bioxin on the other hand improving bead is generated
On temperature (generally 200~400 DEG C), it is ensured that roasting process, which is not regenerated in bioxin, therefore baking flue gas, does not have two Evil
English and moisture discharge, so as to be laid the foundation to reclaim the valuable metal in furnace zone flue gas using bag-type dust.(2) by drying
On the one hand II section of flue gas recirculation recycles dryer section flue gas heat to furnace zone, reduces the discharge of flue gas, the opposing party
Face can also make to dry the not degradable bioxin of II section of drying process in the further pyrolytic of furnace zone, it is ensured that bioxin
Detoxified completely, the organic matter that drying process is evaporated in addition can also be utilized by further burning.It is cold that cooling section is divided into high temperature
But waste gas and low temperature waste gas, may be respectively used in dry II sections and dry I sections so that waste gas residual heat is fully used.(3) pass through
The design of whole technique so that only arranged outside furnace zone and dry I section flue gas, greatly reduces the outer discharge capacity of flue gas.And roasting
The flue gas pollutant of section is relatively easy, predominantly conventional SO2, NOx, and the flue dust rich in valuable metal, due to technique
There is no vapor in rationally design, furnace zone flue gas, so as to be carried out using bag-type dust to the flue dust rich in valuable metal
Reclaim, then by conventional desulphurization and denitration, flue gas can be arranged outside so that two kinds of solid wastes of garbage flying ash and metallurgical dust
Thing can obtain cleaning disposal.
In summary, the present invention proposes garbage flying ash cooperateing with recycling treatment together with metallurgical dust, realizes：1st, fly
The efficient degradation of grey Zhong bioxin；2nd, harmful element K, Na, Pb, Zn, Cl in metallurgical dust and garbage flying ash etc. is passed through into height
Warm technique evaporate into flue gas, is separated with iron-bearing mineral, obtains the high flue dust of K, Na, Pb, Zn content and K, Na, Pb, Zn content are low
Qualified iron-containing charge, recycling is realized jointly；3rd, the energy resource consumption of elevated temperature processes is reduced, realizes that two kinds clean place
Put.
Brief description of the drawings
【Fig. 1】For garbage flying ash and the process chart of metallurgical dust and solid fuel mixing granulation；
【Fig. 2】It is that garbage flying ash and metallurgical dust recycling clean disposal plant sketch；
Wherein, 1 is chimney, and 2 be deduster, and 3 be desulfurizer, and 4 be distributing device, and 5 be igniter, and 6 is dry I sections, and 7 are
II sections are dried, 8 be furnace zone, and 9 be I sections of cooling, and 10 be II sections of cooling.
Embodiment
Following examples are intended to further illustrate present invention, rather than the model that limitation the claims in the present invention are protected
Enclose.
The garbage flying ash of the present invention cleans disposal plant sketch as shown in Fig. 2 main body includes with metallurgical dust recycling
Chimney, deduster, desulfurizer and body of heater.The body of heater from feeding end to discharge end be sequentially provided with it is dry I sections, dry II sections,
II sections of furnace zone, I sections of cooling and cooling.Dry I sections of feeding mouths and be provided with distributing device, dry I sections of tops and pass through pipeline and cooling II
Section top is connected, and is dried I sections of bottoms and is connected provided with pipeline with chimney, pipeline is provided with blower fan.Dry II sections of tops and pass through pipeline
With being connected at the top of furnace zone, dry II sections of bottoms and be connected by I sections of bottoms of pipeline and cooling, pipeline is provided with blower fan.Furnace zone
Bottom is connected with deduster, desulfurizer and chimney successively by pipeline, and pipeline is provided with blower fan；It is provided with the pan feeding of furnace zone
Igniter.Dry I sections of top and dry II sections of bottoms and be provided with cool air inlet.
Ball material passes through distributing device cloth, initially enters dry I sections and carries out hot exhausting drying at low temperature, removes moisture, directly
Run in sky, and dried ball material, which enters, to be dried II section and carry out high-temperature blast dryings, with bioxin and other organic components of degrading, with
And other organic components that volatilize, these volatilization organic components burnt into furnace zone as auxiliary fuel.Ball material enters again
Enter furnace zone, by igniter fire, conflagration, heating, are sintered consolidation mineralising, while realizing two under draft effect
The chlorination metal salt such as the further degraded of Evil English and volatilization K, Na, Pb, Zn, these metal salts are reclaimed by flue gas form,
It is introduced into deduster and reclaims flue dust, then desulphurization denitration, finally empties.Sintered balls material enter cooling I section cooling, cooling I sections give up
Gas dries II sections by filling to input after cold air adjusts the temperature to 500~600 DEG C outside.Ball material enters back into II sections of cooling, cools down II
The waste gas of section dries I sections by filling to input after cold air adjusts the temperature to 50~180 DEG C outside.
Embodiment 1
Shown in Fig. 1, Fig. 2, a kind of garbage flying ash cleans disposing technique with metallurgical dust recycling and uses following step successively
Suddenly：
By taking the garbage flying ash and metallurgical dust that handle China's large size city generation as an example, by municipal refuse flying dust, the smelting
Bronze dirt, coal dust are 1 by amount ratio：2：0.2 is carried out after dispensing, is mixed by intensive mixer；
The bead that granularity is 8mm is made by material is mixed using disc balling machine；
By distributing device by the uniform cloth of bead to chassis, dried through drying I section of exhausting, 80 DEG C of dry-heat air temperature is done
Dry time 30min, gas flow rate 1.8m/s, bead most of moisture is removed, and flue gas can be discharged directly；
Bead, which enters, dries II sections of forced air dryings, 500 DEG C of drying temperature, drying time 6min, gas flow rate 1.5m/s, by force
Change by the degraded of flying dust Zhong bioxin while drying, and remove volatile matter in flying dust, gained dry waste gas is recycled to furnace zone.
Dried pellet enters high temperature calcination section, and bead charge level is lighted a fire in the position of furnace zone, firing temperature
1050 DEG C, duration of ignition 2min, the maximum temperature for controlling roasting process is 1250 DEG C, the high-temperature time 10min more than 1000 DEG C,
Furnace zone flue gas is handled simultaneously, the flue dust that Pb, Zn, K, Na are rich in furnace zone flue gas is collected using bag-type dust, is removed
Desulfurization is carried out after dirt, synchronous denitration, can be arranged outside afterwards if necessary.
After the completion of roasting, product of roasting is through I section of preliminary cooling of cooling, and the high temperature hot waste gas that this section is produced is evacuated to blower fan
II sections are dried, and the petticoat pipe temperature for controlling to dry II sections by converting cold wind outside is 500 DEG C, is used as dry II sections of thermals source.
Cool down I section products through cool down II section of secondary cooling, this section generation low temperature hot waste gas, be evacuated to blower fan it is dry I sections,
And make to dry I sections of petticoat pipe temperature by converting cold wind outside for 80 DEG C, it is used as dry I sections of thermals source.
K, Na, Pb, Zn removal efficiency as shown in table 1, collect K, Na, Pb, Zn content such as institute of table 2 in dust in compound
Show.
Embodiment 2
Shown in Fig. 1, Fig. 2, a kind of garbage flying ash cleans disposing technique with metallurgical dust recycling and uses following step successively
Suddenly：
By taking the garbage flying ash and metallurgical dust that handle China's large size city generation as an example, by municipal refuse flying dust, the smelting
Bronze dirt, coal dust are 1 by amount ratio:5:0.3 is carried out after dispensing, is mixed by intensive mixer；
The bead that granularity is 16mm is made by material is mixed using disc balling machine；
By distributing device by the uniform cloth of bead to chassis, dried through drying I section of exhausting, 150 DEG C of dry-heat air temperature is done
Dry time 15min, gas flow rate 2.4m/s, bead most of moisture is removed, and flue gas can be discharged directly；
Bead, which enters, dries II sections of forced air dryings, 600 DEG C of drying temperature, drying time 3min, gas flow rate 2.0m/s, by force
Change by the degraded of flying dust Zhong bioxin while drying, and remove volatile matter in flying dust, gained dry waste gas is recycled to furnace zone.
Dried pellet enters high temperature calcination section, and bead charge level is lighted a fire in the position of furnace zone, firing temperature
1150 DEG C, duration of ignition 1min, the maximum temperature for controlling roasting process is 1300 DEG C, the high-temperature time 5min more than 1000 DEG C,
Furnace zone flue gas is handled simultaneously, the flue dust that Pb, Zn, K, Na are rich in furnace zone flue gas is collected using bag-type dust, is removed
Desulfurization is carried out after dirt, synchronous denitration, can be arranged outside afterwards if necessary.
After the completion of roasting, product of roasting is through I section of preliminary cooling of cooling, and the high temperature hot waste gas that this section is produced is evacuated to blower fan
II sections are dried, and the petticoat pipe temperature for controlling to dry II sections by converting cold wind outside is 600 DEG C, is used as dry II sections of thermals source.
Cool down I section products through cool down II section of secondary cooling, this section generation low temperature hot waste gas, be evacuated to blower fan it is dry I sections,
And make to dry I sections of petticoat pipe temperature by converting cold wind outside for 150 DEG C, it is used as dry I sections of thermals source.
K, Na, Pb, Zn removal efficiency as shown in table 1, collect K, Na, Pb, Zn content such as institute of table 2 in dust in compound
Show.
Table 1 not in be the same as Example compound K, Na, Pb, Zn removal efficiency
Be the same as Example does not collect K, Na, Pb, Zn content in dust to table 2
Claims (9)
1. a kind of garbage flying ash and metallurgical dust recycling cleaning treatment technique, it is characterised in that：By garbage flying ash, metallurgical dust
With coal blending, pelletizing；Gained ball material sequentially passes through dry I sections, dry II sections, furnace zone, I sections of cooling and cooling II segment process
Processing, obtains iron-containing charge and the flue dust containing Pb, Zn, K and Na is reclaimed in volatilization；
Moisture in the dry I sections of removings ball material；
Component in the middle part of the dry II sections of degradeds ball material including subpackage Han bioxin, and the volatile organic component that volatilizees；Easily
Volatilization organic component input furnace zone is originated as part of fuel；
The furnace zone consolidates ball material into ore deposit, degraded and the part for carrying out II sections of self-desiccation of burning containing the component including bioxin and easily
Volatilized organic component, and volatilization is reclaimed comprising the flue dust component including Pb, Zn, K and Na；Described I sections of cooling ball material of cooling, it is cold
But I sections of waste gas circulations are used as thermal source for II sections to drying；
The further cooling ball material of II sections of cooling, cools down II sections of cooling waste gas circulations and is used as thermal source for I sections to drying.
2. garbage flying ash according to claim 1 and metallurgical dust recycling cleaning treatment technique, it is characterised in that：It is described
It is that exhausting is dried to dry I section, and 80~150 DEG C of hot blast temperature dries 15~30min, 1.8~2.4m/s of gas flow rate.
3. garbage flying ash according to claim 1 and metallurgical dust recycling cleaning treatment technique, it is characterised in that：It is described
It is forced air drying to dry II section, and 500~600 DEG C of hot blast temperature dries 3~6min, 1.5~2.0m/s of gas flow rate.
4. garbage flying ash according to claim 1 and metallurgical dust recycling cleaning treatment technique, it is characterised in that：It is described
The firing temperature of furnace zone is 1050~1150 DEG C, and 1~2min of the duration of ignition is calcined under the conditions of bottom drawing, roasting
Maximum temperature is 1250~1300 DEG C, and the time more than 1000 DEG C is 5~10min.
5. garbage flying ash according to claim 4 and metallurgical dust recycling cleaning treatment technique, it is characterised in that：Roasting
The flue gas of section is delivered to deduster by exhausting and reclaimed comprising the flue dust including Pb, Zn, K and Na.
6. garbage flying ash according to claim 1 and metallurgical dust recycling cleaning treatment technique, it is characterised in that：It is described
I section of waste gas of cooling is delivered to dry II section, and the temperature of II sections of drying control for 500~600 DEG C by converting cold wind outside.
7. garbage flying ash according to claim 1 and metallurgical dust recycling cleaning treatment technique, it is characterised in that：It is described
II section of waste gas of cooling is delivered to dry I section, control I sections of temperature of drying to be 80~150 DEG C by converting cold wind outside.
8. garbage flying ash and metallurgical dust recycling cleaning treatment technique, its feature according to any one of claim 1~7
It is：The mass ratio of garbage flying ash, metallurgical dust and coal dust is 1 in the ball material:2~6:0.15~0.3.
9. garbage flying ash according to claim 8 and metallurgical dust recycling cleaning treatment technique, it is characterised in that：It is described
The particle diameter of ball material is 8~16mm.
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