CN106964637B - 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 PDF

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CN106964637B
CN106964637B CN201710335453.3A CN201710335453A CN106964637B CN 106964637 B CN106964637 B CN 106964637B CN 201710335453 A CN201710335453 A CN 201710335453A CN 106964637 B CN106964637 B CN 106964637B
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dry
sections
section
dust
cooling
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CN106964637A (en
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甘敏
范晓慧
周志安
刘水石
汪国靖
陈许玲
姜涛
李光辉
袁礼顺
季志云
王壮壮
黄柱成
杨永斌
郭宇峰
张元波
李骞
朱忠平
吕薇
周阳
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Central South University
Zhongye Changtian International Engineering Co Ltd
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Central South University
Zhongye Changtian International Engineering Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00Destroying solid waste or transforming solid waste into something useful or harmless
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/40Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B2101/00Type of solid waste
    • B09B2101/30Incineration ashes

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)

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 ingredient is mixed evenly to prepare bead, then Two stage dryer is used, one section of roasting, the technique of two-step cooling handles it, I section is being dried by bead moisture removal, dioxin is degraded and flying dust volatile matter removing at dry II section, and dry waste gas is recycled to furnace zone, utilize the hot environment of furnace zone, it further removes dioxin and volatile matter is made to burn, bead is set to be consolidated into mine in furnace zone, simultaneously by the K in garbage flying ash and metallurgical dust, Na, Pb, Zn etc., which is evaporate into flue gas, recycles it.Cooling I section of waste gas circulation makees heat source to dry II section, and cooling II section of waste gas circulation makees heat source to dry I section, not only makes full use of waste heat, and makes garbage flying ash and metallurgical dust obtain recycling and clean utilization.

Description

A kind of garbage flying ash and metallurgical dust recycling cleaning treatment technique
Technical field
The present invention relates to a kind of garbage flying ash to cooperate with the technique handled with metallurgical dust, in particular to a kind of dry by two sections The technique that dry, one section of roasting, two sections of coolings combine realizes the technique of garbage flying ash and metallurgical dust recycling cleaning treatment, belongs to In Ferrous Metallurgy solid waste and waste incineration and generating electricity flying dust processing technology field.
Background technique
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 is containing the heavy metal contaminants and extremely toxic substance dioxin easily leached, according to China " National Hazard waste register " display of execution, incineration of refuse flyash belong to HW18 class from August 1st, 2016, are hazardous waste, right Environment and human health risk are huge.Currently, the main processing ways and its feature of incineration of refuse flyash: (1) cement solidification is filled out It buries.Increase-volume is larger, occupies large amount of land resources, Cr6+Deng still there is leaching risk, dioxin contamination is not effectively handled;(2) chemical Medicament stabilization technique.The stabilisation of various heavy relatively difficult to achieve, it is weaker to the stability of dioxin and dissolving salt;(3) at heat Reason technology.At present it is mainly cement kiln Synergistic treatment method, has a disadvantage in that the presence of Cl in flying dust easily generates corrosion to kiln body, together When influence Cement Quality, to limit cement use scope, and individually high-temperature process then has that energy consumption is high, investment is big etc. and asks Topic.
Metallurgical dust especially Ferrous Metallurgy dust is that the higher solid waste of iron content can according to its source mostly It is divided into sintering dust, blast furnace dust, electric furnace/converter dust, nonferrous metallurgy ion dust mud contaning etc., currently, steel plant dispose metallurgical powder The main method of dirt is that sintering will be returned after dust collection, because the fluctuation of its chemical constituent is larger, when supplying is sintered, easily causes to be sintered Mine unstable quality, further, since mostly element containing effumability, such as zinc, alkali metal etc. in metallurgical dust, it can be in blast furnace not Disconnected circulation collection, causes furnace nodulation, 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, brings pollution to environment, also cause the valuable element in metallurgical dust Waste.
Summary of the invention
Garbage flying ash in the prior art and metallurgical dust treatment process there are aiming at the problem that, the purpose of the present invention is be There is provided it is a kind of garbage flying ash is cooperateed with into processing with metallurgical dust, by rationally design drying, high-temperature roasting, cooling, flue gas recirculation, The processes such as bag-type dust, flue gas desulfurization and technical parameter are realized the resource utilization of garbage flying ash and metallurgical dust and are cleaned The technique of disposition.
In order to achieve the above technical purposes, the present invention provides a kind of garbage flying ash and metallurgical dust recycling cleaning treatment Technique, the technique are by garbage flying ash, metallurgical dust and coal blending, pelletizing;Gained ball material is successively by I sections dry, dry II sections, furnace zone, cooling I sections and cooling II segment process processing, obtain iron-containing charge and volatilization recycling containing Pb, Zn, K and Na Flue dust;Moisture in the dry I sections of removings ball material;Subpackage is containing the group including dioxin in the middle part of the dry II sections of degradations ball material Point, and the volatile organic component of volatilization;Volatile organic component input furnace zone is as part of fuel source;The furnace zone Consolidation ball material at mine, degradation and burning come II sections of self-desiccation of part containing including dioxin component and volatile organic component, And volatilization recycling includes the flue dust component including Pb, Zn, K and Na;The cooling I sections of cooling ball material, cooling I sections of waste gas circulations Heat source is used as to dry II sections;Described cooling II sections further cooling ball material, cooling II sections of cooling waste gas circulations to dry I sections of works For heat source.
In the prior art, during using high-temperature process garbage flying ash, since Cl content is higher in garbage flying ash, it is easy to To corrosion equipment, and individually high-temperature process garbage flying ash there are energy consumptions it is high, investment is big the problems such as.And metallurgical dust is due to chemical group Partial wave move it is larger, be incorporated agglomeration for iron mine when, Yi Yinqi sinter quality is unstable, and metallurgical dust containing such as zinc, alkali metal easily Volatile element, meeting continuous circulation collection in blast furnace, causes furnace nodulation, to constrain at the scale of metallurgical dust Reason.Technical solution of the present invention is dexterously by two kinds of industrial dust integrated treatments, using the chlorine in garbage flying ash by metallurgical dust In the chloridizing volatilizations recycling such as K, Na, Pb and Zn, not only eliminate the content of poisonous metal in metallurgical dust, obtain qualified contain Iron furnace material, while also solving the problems, such as that chlorine corrodes equipment in flying dust.Simultaneously using the CaO for including in garbage flying ash at being allocated as For the binder of metallurgical dust, it is not necessarily to outer adding additives in roasting process, realizes effective consolidation of garbage flying ash and metallurgical dust, Generate qualified iron-containing charge.In addition, the harmful components such as dioxin are effectively split in garbage flying ash in high-temperature calcination process Solution reduces the harm to environment.
Technical solution of the present invention has rationally designed Two stage dryer, one section of roasting and two sections of cooling techniques to handle rubbish Flying dust and metallurgical dust raw material.Effective degradation of dioxin in garbage flying ash is not only realized, and has effectively recycled metallurgical powder The metallic elements such as K, Na, Pb and Zn in dirt obtain qualified iron-smelting raw material, realize the recycling benefit of two kinds of dust wastes With;Meanwhile by recycling to high-temp waste gas, the energy consumption of entire technique is greatly reduced.
Preferred scheme, I section of the drying is dry for exhausting, and 80~150 DEG C of hot blast temperature, dry 15~30min, gas 1.8~2.4m/s of flow velocity.Due to easily bursting 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, ball material is dried to water content appropriate, effectively prevents garbage flying ash bead Cause bead to burst because moisture evaporates rapidly in II section for the treatment of process of subsequent drying, causes to generate powder excitation dioxin again It generates.Meanwhile it is dry using exhausting, system is all discharged in moisture, is conducive to the recycling of dust in subsequent flue gas.
Preferred scheme, II section of the drying is forced air drying, 500~600 DEG C of hot blast temperature, dries 3~6min, gas 1.5~2.0m/s of flow velocity.Of the invention II section of drying is mainly to organic matter degradations and volatilizations such as dioxin in ball material, at this The organic matters such as most of dioxin can be degraded under optimum condition, while by forced air drying, dioxin can be degraded Ingredient and volatile organic component input furnace zone as fuel gas recycling use.
Preferred scheme, the firing temperature of the furnace zone are 1050~1150 DEG C, 1~2min of the duration of ignition, in bottom It is roasted under the conditions of exhausting, roasting maximum temperature is 1250~1300 DEG C, and the time greater than 1000 DEG C is 5~10min.Roasting Section is sintered by using exhausting mode, and under the action of exhausting, the height temperate zone that fuel combustion generates gradually is expected to the lower part from charge level Layer transmitting, improves the heating rate of roasting process, reduces the secondary generation probability of dioxin, while can make cigarette by exhausting Gas is discharged in time, is conducive to the recycling of flue dust.
Preferred scheme, furnace zone flue gas are delivered to deduster recycling by exhausting and include the cigarette including Pb, Zn, K and Na Dirt.
Preferred scheme, the exhaust gas of I section of the cooling be delivered to it is II sections dry, by converting dry II sections of cold wind control outside Temperature is 500~600 DEG C.
Preferred scheme, the exhaust gas of II section of the cooling be delivered to it is I sections dry, it is warm by converting dry I section of cold wind control outside Degree is 80~150 DEG C.
The flue gas of preferred scheme, the furnace zone is collected using bag-type dust comprising the flue dust group including Pb, Zn, K, Na Point.It is mainly the chlorate of these metals containing the flue dust component including Pb, Zn, K, Na.
Preferred scheme, in the ball material mass ratio of garbage flying ash, metallurgical dust and coal dust be 1:2~6:0.15~ 0.3.Garbage flying ash and metallurgical dust are reasonably arranged in pairs or groups, can utmostly mutually using two kinds of solid dusts component into Row chemical reaction such as carries out bonding using the calcium oxide in garbage flying ash and realizes the chlorine for being consolidated into mine and utilizing in garbage flying ash Realize the volatilization recycling in a chloride-form such as Pb, Zn, K, Na.
Preferred scheme, the partial size of the ball material are 8~16mm.
When garbage flying ash of the invention is including the use of grate furnace incinerator or rotary kiln incineration garbage power, from waste heat boiler Fine-grained solids waste obtained by being trapped 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 dioxin, general processing method is difficult " to solve and do harm to " it.
Metallurgical dust of the invention includes the blast furnace dust generated in steel manufacture process, gravitational dust, electric furnace dirt, converter At least one of the ion dust mud contaning that mud, sintering one or two electric field of electric precipitation ash, environmental dust removal ash and Nonferrous Metallurgical Process generate.This A little metallurgical dusts are the iron content secondary resource for including the harmful elements such as K, Na, Pb, Zn, there are independent granulating efficiency is poor, are needed Outer adding additives, and be difficult to directly as iron-smelting raw material for agglomeration for iron mine.
Garbage flying ash and metallurgical dust recycling of the invention cleans disposing technique, comprising the following steps:
1) 8 will be made after garbage flying ash, metallurgical dust and coal dust ingredient 1:2~6:0.15 in mass ratio~0.3 mix~ The bead of 16mm, and by the uniform cloth to trolley of distributing device;
2) dry I sections of drying process, dry I section is down-draft drying zone, and hot blast temperature is 80~150 DEG C, dry 15~ 30min, gas flow rate are 1.8~2.4m/s, and dry I section can direct emission by ball material moisture removal, flue gas;
3) dry II sections of drying process, dry II sections are blasting drying period, and hot blast temperature is 500~600 DEG C, dry 3~ 6min, gas flow rate are 1.5~2.0m/s, and dry II section are degraded dioxin 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 to bead charge level in the position for entering furnace zone, temperature 1050~1150 DEG C, 1~2min of the duration of ignition is sintered under the conditions of bottom drawing, control roasting process maximum temperature be 1250~ 1300 DEG C, 5~10min of high-temperature time greater than 1000 DEG C;Flying dust and metallurgical dust is set to be consolidated into mine in furnace zone, while will be former Pb, Zn, K, Na etc. in material evaporate into flue gas and recycle to it, and the gas after recycling flue dust discharges after desulfurizing tower desulfurization;
5) cooling I section cooling techniques, cooling I sections are high temperature section hot waste gas, hot waste gas is evacuated to blower it is II sections dry, and It is 500~600 DEG C by converting dry II sections of the petticoat pipe temperature of cold wind control outside;
6) cooling II section of cooling technique, cooling II section is low temperature hot waste gas, this section of exhaust gas is evacuated to blower it is I sections dry, And make to dry I sections 80~150 DEG C of petticoat pipe temperature by converting cold wind outside.
Compared with the prior art, technical solution of the present invention bring the utility model has the advantages that
1) present invention handles garbage flying ash and Ferrous Metallurgy dust collaboration, makes metal not volatile in two kinds of dust Substance is efficiently cured in the high temperature process, generates the iron-containing charge of quality qualification, and when two volatile valuable metal elements Efficiently volatilize and the utilization that is captured;The dioxin 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, generate Apparent synergistic effect: 1. the CaO in garbage flying ash can be used as a kind of binder, need when solving metallurgical dust granulation additional viscous The problem of tying agent;2. under hot conditions, garbage flying ash and metallurgical dust are effectively consolidated, qualified iron-containing charge is generated;3. high Under the conditions of temperature, the chlorine in garbage flying ash has in conjunction with volatile heavy, alkali metal with metallurgical dust, evaporates into flue gas, leads to Cloth bag deduster can sufficiently collect the high flue dust of valuable metal content, avoid the wasting of resources;4. under hot conditions, rubbish flies Dioxin extremely toxic substance in ash is effectively decomposed.
2) present invention devise reasonable Two stage dryer+cooling technique of+two sections of sintering, not only realize garbage flying ash with The normal sintering of metallurgical dust, and energy consumption is greatly saved, be conducive to industrial applications.Specific advantage is as follows: (1) foundation contains Powder-refining with water ash bead is easy the characteristic of explosion at 500~600 DEG C, devises two-part drying process, passes through dry I section of low temperature drying Dehydration, it is ensured that flying dust bead dry unlikely explosion at 500~600 DEG C of subsequent higher temperature.Meanwhile in II section dry a, side Face can be by the degradation of most of dioxin of flying dust, devolatilization, and temperature to the dioxin on the other hand improving bead generates On temperature (generally 200~400 DEG C), guarantee that roasting process does not regenerate dioxin, therefore there is no two evils in baking flue gas English and moisture discharge, to lay the foundation to recycle the valuable metal in furnace zone flue gas using bag-type dust.(2) it will dry On the one hand II section of flue gas recirculation recycles dryer section flue gas heat to furnace zone, reduce the discharge of flue gas, another party The dioxin that face can also make dry II section of drying process not degradable is in the further pyrolytic of furnace zone, it is ensured that dioxin Detoxified completely, the organic matter that in addition drying process evaporates can also be utilized by further burning.It is cold that cooling section is divided into high temperature But exhaust gas and low temperature waste gas may be respectively used in dry II sections and I sections of drying, so that waste gas residual heat is fully used.(3) pass through The design of entire technique, so that only furnace zone and dry I section of flue gas outlet, greatly reduces the outer discharge capacity of flue gas.And it roasts Relatively easy, the predominantly conventional SO of the flue gas pollutant of section2, NOx, and the flue dust rich in valuable metal, due to technique It rationally designs, there is no vapor in furnace zone flue gas, so as to use bag-type dust to carry out the flue dust rich in valuable metal Recycling, then by conventional desulphurization and denitration, flue gas can outlet so that two kinds of solid wastes of garbage flying ash and metallurgical dust The available cleaning disposition of object.
In conclusion the present invention proposes garbage flying ash cooperateing with recycling treatment together with metallurgical dust, realize: 1, flying The efficient degradation of dioxin in ash;2, harmful element K, Na, Pb, Zn, Cl etc. in metallurgical dust and garbage flying ash are passed through into height Warm technique evaporate into flue gas, separates with iron-bearing mineral, and it is low to obtain K, Na, Pb, Zn content high flue dust and K, Na, Pb, Zn content Qualified iron-containing charge, realize recycling jointly;3, the energy consumption of elevated temperature processes is reduced, two kinds of realization cleans place It sets.
Detailed description of the invention
[Fig. 1] is the process flow chart of garbage flying ash and metallurgical dust and solid fuel mixing granulation;
[Fig. 2] is that garbage flying ash and metallurgical dust recycling clean disposal plant schematic diagram;
Wherein, 1 is chimney, and 2 be deduster, and 3 be desulfurizer, and 4 be distributing device, and 5 be igniter, and 6 is I sections dry, and 7 are II sections dry, 8 be furnace zone, and 9 is I sections cooling, and 10 be II sections cooling.
Specific embodiment
Following embodiment is intended to further illustrate the content of present invention, rather than limits the model of the claims in the present invention protection It encloses.
Garbage flying ash of the invention cleans disposal plant schematic diagram as shown in Fig. 2, main body includes with metallurgical dust recycling Chimney, deduster, desulfurizer and furnace body.The furnace body from feeding end to discharge end be successively arranged it is II sections I sections dry, dry, Furnace zone, cooling I sections and II sections of cooling.Dry I sections of feeding inlets are equipped with distributing device, and dry I sections of tops pass through pipeline and cooling II The connection of section top, dry I sections of bottoms are equipped with pipeline and connect with chimney, and pipeline is equipped with blower.Dry II sections of tops pass through pipeline It is connect with furnace zone top, dry II sections of bottoms are connect by pipeline with cooling I sections of bottoms, and pipeline is equipped with blower.Furnace zone Bottom is successively connect with deduster, desulfurizer and chimney by pipeline, and pipeline is equipped with blower;It is equipped at the pan feeding of furnace zone Igniter.Dry I sections of top and dry II sections of bottoms are equipped 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, it is dry after ball material enter dry II section progress high-temperature blast and dry, with dioxin and other organic components of degrading, with And other organic components that volatilize, the organic component of these volatilizations enter furnace zone and burn as auxiliary fuel.Ball material again into Enter furnace zone, by igniter fire, conflagration, heating under draft effect are sintered consolidation mineralising, while realizing two Chlorinations metal salt, these metal salts such as further degradation and volatilization K, Na, Pb, Zn of English are disliked to be recycled by flue gas form, It is introduced into deduster recycling flue dust, then desulphurization denitration, is finally emptied.Sintered balls material enters cooling I sections of cooling, and I sections of cooling is given up Gas inputs II sections dry after filling cold air outside and adjusting the temperature to 500~600 DEG C.Ball material enters back into II sections cooling, cooling II The exhaust gas of section inputs I sections dry after filling cold air outside and adjusting the temperature to 50~180 DEG C.
Embodiment 1
Shown in Fig. 1, Fig. 2, a kind of garbage flying ash and metallurgical dust recycling clean disposing technique and successively use following step It is rapid:
For handling the garbage flying ash and metallurgical dust of China large size city generation, by the municipal refuse flying dust, smelting Bronze dirt, coal dust are after 1:2:0.2 carries out ingredient, to be mixed by intensive mixer by amount ratio;
The bead that granularity is 8mm is made by material is mixed using disc balling machine;
By distributing device by the uniform cloth to trolley of bead, through dry I section of exhausting drying, 80 DEG C of dry-heat air temperature, do Dry time 30min, gas flow rate 1.8m/s, bead most of moisture are removed, and flue gas can direct emission;
Bead enters dry II sections of forced air drying, and 500 DEG C of drying temperature, drying time 6min, gas flow rate 1.5m/s, by force Dioxin in flying dust is degraded while changing dry, and removes volatile matter in flying dust, gained dry waste gas is recycled to furnace zone.
Dried pellet enters high temperature calcination section, and lights a fire in the position of furnace zone to bead charge level, 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 greater than 1000 DEG C, Furnace zone flue gas is handled simultaneously, the flue dust for being rich in Pb, Zn, K, Na in furnace zone flue gas is collected using bag-type dust, is removed Desulfurization is carried out after dirt, synchronizes denitration when necessary, it later can outlet.
After the completion of roasting, product of roasting is preliminary cooling through cooling I section, and the high temperature hot waste gas that this section generates is evacuated to blower It is II sections dry, and be 500 DEG C by converting dry II sections of the petticoat pipe temperature of cold wind control outside, as dry II sections of heat sources.
Cooling I section products are through cooling II section of secondary cooling, the low temperature hot waste gas of this section of generation, be evacuated to blower it is I sections dry, And make to dry I sections 80 DEG C of petticoat pipe temperature by converting cold wind outside, as dry I sections of heat sources.
The removal efficiency of K, Na, Pb, Zn are as shown in table 1 in mixture, collect K, Na, Pb, Zn content such as 2 institute of table in dust Show.
Embodiment 2
Shown in Fig. 1, Fig. 2, a kind of garbage flying ash and metallurgical dust recycling clean disposing technique and successively use following step It is rapid:
For handling the garbage flying ash and metallurgical dust of China large size city generation, by the municipal refuse flying dust, smelting Bronze dirt, coal dust are after 1:5:0.3 carries out ingredient, to be mixed by intensive mixer by amount ratio;
The bead that granularity is 16mm is made by material is mixed using disc balling machine;
By distributing device by the uniform cloth to trolley of bead, through dry I section of exhausting drying, 150 DEG C of dry-heat air temperature, do Dry time 15min, gas flow rate 2.4m/s, bead most of moisture are removed, and flue gas can direct emission;
Bead enters dry II sections of forced air drying, and 600 DEG C of drying temperature, drying time 3min, gas flow rate 2.0m/s, by force Dioxin in flying dust is degraded while changing dry, and removes volatile matter in flying dust, gained dry waste gas is recycled to furnace zone.
Dried pellet enters high temperature calcination section, and lights a fire in the position of furnace zone to bead charge level, 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 greater than 1000 DEG C, Furnace zone flue gas is handled simultaneously, the flue dust for being rich in Pb, Zn, K, Na in furnace zone flue gas is collected using bag-type dust, is removed Desulfurization is carried out after dirt, synchronizes denitration when necessary, it later can outlet.
After the completion of roasting, product of roasting is preliminary cooling through cooling I section, and the high temperature hot waste gas that this section generates is evacuated to blower It is II sections dry, and be 600 DEG C by converting dry II sections of the petticoat pipe temperature of cold wind control outside, as dry II sections of heat sources.
Cooling I section products are through cooling II section of secondary cooling, the low temperature hot waste gas of this section of generation, be evacuated to blower it is I sections dry, And make to dry I sections 150 DEG C of petticoat pipe temperature by converting cold wind outside, as dry I sections of heat sources.
The removal efficiency of K, Na, Pb, Zn are as shown in table 1 in mixture, collect K, Na, Pb, Zn content such as 2 institute of table in dust Show.
The removal efficiency of K, Na, Pb, Zn in the different embodiment mixtures of table 1
The different embodiments of table 2 collect K, Na, Pb, Zn content in dust

Claims (5)

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 is successively by I sections dry, II sections dry, furnace zone, cooling I sections and cooling II segment process Processing obtains the flue dust of iron-containing charge and volatilization recycling containing Pb, Zn, K and Na;
Moisture in the dry I sections of removings ball material;
Subpackage is containing the component including dioxin, and the volatile organic component of volatilization in the middle part of the dry II sections of degradations ball material;Easily Organic component input furnace zone volatilize as part of fuel source;
Furnace zone consolidation ball material comes II section of self-desiccation of part containing component including dioxin and easy at mine, degradation and burning Volatilize organic component, and volatilization recycling includes the flue dust component including Pb, Zn, K and Na;
The cooling I sections of cooling ball material, cooling I sections of waste gas circulations are to dry II sections as heat source;
Described cooling II sections further cooling ball material, cooling II sections of cooling waste gas circulations are to dry I sections as heat source;
I section of the drying is dry for exhausting, and 80~150 DEG C of hot blast temperature, dry 15~30min, 1.8~2.4m/ of gas flow rate s;
II section of the drying is forced air drying, 500~600 DEG C of hot blast temperature, dries 3~6min, 1.5~2.0m/ of gas flow rate s;
The firing temperature of the furnace zone is 1050~1150 DEG C, and 1~2min of the duration of ignition is roasted under the conditions of bottom drawing It burns, roasting maximum temperature is 1250~1300 DEG C, and the time greater than 1000 DEG C is 5~10min;
The mass ratio of garbage flying ash, metallurgical dust and coal dust is 1:2~6:0.15~0.3 in the ball material.
2. garbage flying ash according to claim 1 and metallurgical dust recycling cleaning treatment technique, it is characterised in that: roasting The flue gas of section is delivered to deduster recycling by exhausting and includes the flue dust including Pb, Zn, K and Na.
3. garbage flying ash according to claim 1 and metallurgical dust recycling cleaning treatment technique, it is characterised in that: described Cooling I section of exhaust gas is delivered to II section dry, is 500~600 DEG C by converting dry II sections of the temperature of cold wind control outside.
4. garbage flying ash according to claim 1 and metallurgical dust recycling cleaning treatment technique, it is characterised in that: described Cooling II section of exhaust gas is delivered to I section dry, is 80~150 DEG C by converting the dry I sections of temperature of cold wind control outside.
5. garbage flying ash according to claim 1 and metallurgical dust recycling cleaning treatment technique, it is characterised in that: described The partial size of ball material is 8~16mm.
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