CN106895412B - A method of utilizing cement kiln two-part disposal of solid castoff burning flying dust - Google Patents

A method of utilizing cement kiln two-part disposal of solid castoff burning flying dust Download PDF

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CN106895412B
CN106895412B CN201710260206.1A CN201710260206A CN106895412B CN 106895412 B CN106895412 B CN 106895412B CN 201710260206 A CN201710260206 A CN 201710260206A CN 106895412 B CN106895412 B CN 106895412B
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flying dust
steel cylinder
segment
auxiliary
import
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CN106895412A (en
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李春萍
张青锋
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Golmud Hongyang Environmental Protection Technology Co. Ltd.
Jinyuan environmental protection Co., Ltd.
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Golmud Hongyang Environmental Protection Technology Co Ltd
Golden Round Cement Ltd By Share Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/006General arrangement of incineration plant, e.g. flow sheets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/20Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • F23G5/442Waste feed arrangements
    • F23G5/444Waste feed arrangements for solid waste
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00Combustion
    • F23G2202/10Combustion in two or more stages
    • F23G2202/102Combustion in two or more stages with supplementary heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00Combustion
    • F23G2202/10Combustion in two or more stages
    • F23G2202/103Combustion in two or more stages in separate chambers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00Furnace arrangements
    • F23G2203/20Rotary drum furnace
    • F23G2203/211Arrangement of a plurality of drums
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2205/00Waste feed arrangements
    • F23G2205/12Waste feed arrangements using conveyors
    • F23G2205/121Screw conveyor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2900/00Special features of, or arrangements for incinerators
    • F23G2900/52002Rotary drum furnaces with counter-current flows of waste and gas

Abstract

The invention discloses a kind of methods using cement kiln two stage process solid waste incineration flying dust, the device used is cement kiln and a flying dust processing unit of cement kiln rear end connection, the device includes first segment revolution steel cylinder and second segment revolution steel cylinder, is included the following steps:It is separately added into pending flying dust and the second auxiliary material from the flying dust import and the second auxiliary material import that second segment turns round steel cylinder;Tail gas in cement kiln tail smoke-box or wicket cover is sent into the inlet exhaust gas of flying dust processing unit front end;The first auxiliary material is added in the first auxiliary material import that first segment turns round steel cylinder;The flue gas that flying dust generates after being handled in flying dust processing unit is discharged from air-introduced machine.This method utilizes cement kiln therrmodynamic system, cement kiln heat source is combined with the disposition of solid waste incineration flying dust, can not only make full use of the thermal energy of cement kiln, and can quickly, safety, low-cost, high-volume disposition flying dust, substantially reduce the cost of flying dust processing.

Description

A method of utilizing cement kiln two-part disposal of solid castoff burning flying dust
Technical field
The present invention relates to solid waste recycling fields, in particular for cement kiln synergic processing solid waste incineration The treatment technology of flying dust, it is specially a kind of to burn and fly using cement kiln and its tail gas two-part of generation reason solid waste gurry The method of ash
Background technology
With the development of the social economy, Process of Urbanization is aggravated, many big and medium-sized cities in China meet with " garbage-surrounded city ", " dirt The multiple puzzlements such as mud disposition ".Solid waste processing generally has 3 kinds of modes:Landfill, burning and compost, China's solid is useless at present Gurry processing still uses based on filling, and the measure supplemented by compost and burning, this will occupy a large amount of land resource.With landing The rising of valence, the continuous improvement that urban environment requires, landfill become no longer economic and safety, and more and more cities start to consider Burning disposal.Burning disposal can make solid waste volume reduce by 80 ~ 90%, and the fast, floor space with processing speed Small, minimizing and innoxious efficient, and the advantages that recovering energy source, some economic levels are higher, refuse thermal value is high, soil The limited city of resource, will be widely applied.
However, solid waste incineration unavoidably generates flying dust.Containing a large amount of heavy metal He bioxin, quilt in flying dust Referred to as extra quality pollutant.The study found that content of beary metal accounts for about 1% ~ 9% in flying dust, the leaching level of each heavy metal species reaches danger The judging standard of dangerous waste may generate serious toxic action to environment, and therefore, flying dust is all classified as dangerous useless by countries in the world Object must be handled before landfill, be disposed.What Environmental Protection in China general bureau promulgated for 2001《Hazardous Wastes Management Prevention Technique political affairs Plan》In, domestic garbage incineration flyash is set to hazardous waste, it is specified that:" flying dust that consumer waste incineration generates must be received individually Collection ";" domestic garbage incineration flyash must carry out transporting after necessary solidification and stabilization processes in grown place ";It is " raw Incineration of refuse flyash living must carry out security landfill disposition ".Therefore, domestic garbage incineration flyash landfill or recycling before, it is right The processing of heavy metal is essential.
It is domestic mainly to have security landfill to flying dust treatment technology at present and enter cement kiln synergic processing two ways.But by The chlorine contained in flying dust is higher, so, cement kiln synergic processing generally using washing remove flying dust in chlorine element after again into Enter cement kiln burning, this technological accumulation and inheritance safety, but disposing technique is cumbersome, disposition amount is small and cost is higher.
Invention content
The technical problem to be solved in the present invention is to provide a kind of quick, safety, the skills of low-cost, high-volume disposition flying dust Art.
A method of using cement kiln two stage process solid waste incineration flying dust, the device that the method uses for Cement kiln and cement kiln rear end connection a flying dust processing unit, the flying dust processing unit include first segment revolution steel cylinder and Second segment turns round steel cylinder, and the rear end of the first segment revolution steel cylinder is connect with second segment revolution steel cylinder front end, and first segment turns round steel It is interconnected inside cylinder and second segment revolution steel cylinder, and screw blade is both provided in two sections of revolution steel cylinders;The first segment returns The front end for turning steel cylinder is provided with inlet exhaust gas and slag-drip opening, and the first auxiliary material import is arranged in the rear end that first segment turns round steel cylinder;It is described The rear end of second segment revolution steel cylinder is provided with flying dust import, the second auxiliary material import and exhanst gas outlet;The smoke outlet connection There is air-introduced machine, the described method comprises the following steps:
A, adjustment first segment revolution steel cylinder and second segment revolution steel cylinder rotating speed are 30 ~ 45r/min, and steel is turned round from second segment It is separately added into pending flying dust and the second auxiliary material in the flying dust import and the second auxiliary material import of cylinder;The ingredient of second auxiliary material Including iron tailings and kaolinite;The iron tailings accounts for the 5% ~ 10% of flying dust quality;The kaolinite accounts for the 1% ~ 3% of flying dust quality;
B, the tail gas in cement kiln tail smoke-box or wicket cover is sent by flying dust processing unit front end using high temperature resistant air hose Inlet exhaust gas in, introduce tail gas initial temperature be 1000 ~ 1200 DEG C, introduce tail gas initial air quantity be 50000 ~ 100000m3/ h, the initial oxygen content for introducing tail gas are 2% ~ 5%;
C, the first auxiliary material is added in the first auxiliary material import that first segment turns round steel cylinder, first auxiliary material includes epoxy Resin and fluorite, epoxy resin account for the 1% ~ 5% of flying dust quality;Fluorite accounts for the 0.5% ~ 1.5% of flying dust quality;
D, the flue gas that flying dust generates after being handled in flying dust processing unit is discharged from air-introduced machine, and the direction of flying dust and flue gas is Inversely.
Further, the flue gas respectively enters ozone+Ultraviolet Oxidation equipment, 1% ~ 5%NaOH after being discharged in air-introduced machine Solution is incorporated to cement kiln end bag dust arrester installation after absorbing, and is discharged after processing.
Further, it after the completion of step C, is turned round in steel cylinder in second segment, the exhaust temperature of introducing is reduced to 750 ~ 850 DEG C, air quantity is reduced to 20000 ~ 60000m3/ h, oxygen content are reduced to 1% ~ 3%.
Further, the first segment revolution steel cylinder and second segment revolution steel cylinder are respectively provided with inner lining refractory.
Further, the first segment revolution steel cylinder and second segment revolution steel cylinder are cylindrical steel cylinder, draw ratio 3 ~ 5: 1, the central axis of cylindrical steel cylinder and the angle of horizontal direction are 2 ~ 6 °, are inclination from bottom to top from front end to rear end.
Further, first auxiliary material is transported to the first auxiliary material import using screw conveyor.
Further, second auxiliary material is transported to the second auxiliary material import using screw conveyor.
Flying dust is added in second segment rotates steel cylinder by the present invention and the second auxiliary material, the main component of the second auxiliary material are:Iron tail Mine and kaolinite.The main function of the second auxiliary material, which is added, is:(1)Adsorb the heavy metal in the flue gas that first segment volatilization generates;(2) Form the mineral facies of similar clinker;(3)According to the volatilization feature of the material in flying dust, the potassium chloride in flying dust is evaporated Salt.The addition of flying dust and the second auxiliary material will carry out before tail gas introducing, and the additive amount of flying dust and the second auxiliary material is before addition It is just calculated according to the relevant parameter of the tail gas of introducing, the initial temperature for introducing tail gas is 1000 ~ 1200 DEG C, with reaction It carries out, flying dust enters heat exchange with the second auxiliary material and the tail gas of introducing, and final tail gas is in the case where second segment turns round the temperature in steel cylinder The processing of flying dust reaches ideal technique effect when being reduced to 750 ~ 850 DEG C, to reach this temperature, and such as flying dust and second is being added Addition will be calculated before auxiliary material.The initial air quantity for introducing tail gas is 50000 ~ 100000m3/ h, because of revolution steel cylinder Rotating speed setting and auxiliary material addition, the air quantity that final tail gas is turned round in second segment in steel cylinder falls to 20000 ~ 60000m3The processing of flying dust reaches ideal technique effect when/h.
In the first segment revolution steel cylinder of flying dust processing unit, the first auxiliary material is added, the first auxiliary material is mainly asphalt mixtures modified by epoxy resin The main function of fat and fluorite mixture, fluorite is the melting temperature for reducing flying dust, and the main function of epoxy resin is acceleration two The decomposition of Evil English;After the first auxiliary material is added, the melting temperature of flying dust is reduced to 1000 ~ 1100 DEG C of , bioxin resolution ratios to reach 99% More than.The initial oxygen content for introducing tail gas is 2% ~ 5%, is consumed with the removing of bioxin after the first auxiliary material is added, when The processing of flying dust reaches ideal technique effect when the oxygen content that tail gas is turned round in second segment in steel cylinder falls to 1% ~ 3%.
Beneficial effects of the present invention:
1)This method utilizes cement kiln therrmodynamic system, and cement kiln heat source and the disposition of solid waste incineration flying dust are mutually tied Close, can not only make full use of the thermal energy of cement kiln, and can quickly, safety, low-cost, high-volume disposition flying dust, significantly Reduce the cost of flying dust processing.
2)Flying dust after treatment, chemical constitution is similar with clinker, can be used as cement mixture use, addition Amount can reach 35% or more.
Invention is described in detail with reference to the accompanying drawings and examples.
Description of the drawings
Fig. 1 is flying dust disposal plant structural schematic diagram of the present invention;
Fig. 2 is flying dust disposing task schematic diagram.
Specific implementation mode
As depicted in figs. 1 and 2, a method of described using cement kiln two stage process solid waste incineration flying dust The device that method uses is cement kiln and a flying dust processing unit of the connection of cement kiln rear end 1, the flying dust processing unit packet First segment revolution steel cylinder 2 and second segment revolution steel cylinder 3 are included, before the rear end of the first segment revolution steel cylinder and second segment turn round steel cylinder End connection, first segment is turned round inside steel cylinder and second segment revolution steel cylinder and is interconnected, and is both provided with spiral shell in two sections of revolution steel cylinders Revolve blade 201 and 301;The front end of the first segment revolution steel cylinder is provided with tail gas(Waste heat)Import 202 and slag-drip opening 203, the The first auxiliary material import 204 is arranged in the rear end of one section of revolution steel cylinder;The rear end of the second segment revolution steel cylinder is provided with flying dust import 302, the second auxiliary material import 303 and exhanst gas outlet 304;The smoke outlet is connected with air-introduced machine(It is not shown in figure), described Method includes the following steps:
A, adjustment first segment revolution steel cylinder and second segment revolution steel cylinder rotating speed are 30 ~ 45r/min, and steel is turned round from second segment It is separately added into pending flying dust and the second auxiliary material in the flying dust import and the second auxiliary material import of cylinder;The ingredient of second auxiliary material Including iron tailings and kaolinite;The iron tailings accounts for the 5% ~ 10% of flying dust quality;The kaolinite accounts for the 1% ~ 3% of flying dust quality;
B, the tail gas in cement kiln tail smoke-box or wicket cover is sent by flying dust processing unit front end using high temperature resistant air hose Inlet exhaust gas in, introduce tail gas initial temperature be 1000 ~ 1200 DEG C, introduce tail gas initial air quantity be 50000 ~ 100000m3/ h, the initial oxygen content for introducing tail gas are 2% ~ 5%;
C, the first auxiliary material is added in the first auxiliary material import that first segment turns round steel cylinder, first auxiliary material includes asphalt mixtures modified by epoxy resin Fat and fluorite, epoxy resin account for the 1% ~ 5% of flying dust quality;Fluorite accounts for the 0.5% ~ 1.5% of flying dust quality;It is turned round at this time in second segment In steel cylinder, the exhaust temperature of introducing is reduced to 750 ~ 850 DEG C, and air quantity is reduced to 20000 ~ 60000m3/ h, oxygen content are reduced to 1% ~ 3%.
D, the flue gas that flying dust generates after being handled in flying dust processing unit is discharged from air-introduced machine, the direction of flying dust and flue gas It is reverse.
Flue gas respectively enters ozone+Ultraviolet Oxidation equipment after being discharged in air-introduced machine, 1% ~ 5%NaOH solution is incorporated to after absorbing Cement kiln end bag dust arrester installation, is discharged after processing.
First segment turns round steel cylinder and second segment revolution steel cylinder is respectively provided with inner lining refractory.First segment turns round steel cylinder and second Duan Huizhuan steel cylinders are cylindrical steel cylinder, draw ratio 3 ~ 5:1, the central axis of cylindrical steel cylinder and the angle of horizontal direction be 2 ~ 6 °, since front end to rear end is inclination from bottom to top.
First auxiliary material is transported to the first auxiliary material import using screw conveyor.Second auxiliary material is transported to using screw conveyor Second auxiliary material import.
The solid waste includes domestic waste, sludge, aging rubbish.
Embodiment 1
As shown in Figure 1, a kind of method using cement kiln two stage process solid waste incineration flying dust, the method is adopted Device is a flying dust processing unit of cement kiln and the connection of cement kiln rear end, and the flying dust processing unit includes first segment It turns round steel cylinder and second segment turns round steel cylinder, the rear end of the first segment revolution steel cylinder is connect with second segment revolution steel cylinder front end, the It is interconnected inside one section of revolution steel cylinder and second segment revolution steel cylinder, and screw blade is both provided in two sections of revolution steel cylinders;Institute The front end for stating first segment revolution steel cylinder is provided with tail gas(Waste heat)Import and slag-drip opening, first segment turn round the rear end setting the of steel cylinder One auxiliary material import;The rear end of the second segment revolution steel cylinder is provided with flying dust import, the second auxiliary material import and exhanst gas outlet;It is described Smoke outlet is connected with air-introduced machine, the described method comprises the following steps:
It is 30r/min that A, which adjusts first segment revolution steel cylinder and second segment revolution steel cylinder rotating speed, and steel cylinder is turned round from second segment Flying dust import and the second auxiliary material import in be separately added into pending flying dust and the second auxiliary material;Second auxiliary material at subpackage Include iron tailings and kaolinite;The iron tailings accounts for the 10% of flying dust quality;The kaolinite accounts for the 1% of flying dust quality;
B, the tail gas in cement kiln tail smoke-box or wicket cover is sent by flying dust processing unit front end using high temperature resistant air hose Inlet exhaust gas in, introduce tail gas initial temperature be 1000 DEG C, introduce tail gas initial air quantity be 80000m3/ h introduces tail The initial oxygen content of gas is 3%;
C, the first auxiliary material is added in the first auxiliary material import that first segment turns round steel cylinder, first auxiliary material includes epoxy Resin and fluorite, epoxy resin account for the 5% of flying dust quality;Fluorite accounts for the 0.5% of flying dust quality;At this time steel cylinder is turned round in second segment In, the exhaust temperature of introducing is reduced to 800 DEG C, and air quantity is reduced to 50000m3/ h, oxygen content are reduced to 1.8%.
The flue gas that D flying dusts generate after being handled in flying dust processing unit is discharged from air-introduced machine, and the direction of flying dust and flue gas is Inversely.
Flue gas respectively enters ozone+Ultraviolet Oxidation equipment after being discharged in air-introduced machine, 1% ~ 5%NaOH solution is incorporated to after absorbing Cement kiln end bag dust arrester installation, is discharged after processing.
First segment turns round steel cylinder and second segment revolution steel cylinder is respectively provided with inner lining refractory.First segment turns round steel cylinder and second Duan Huizhuan steel cylinders are cylindrical steel cylinder, draw ratio 5:1, the central axis of cylindrical steel cylinder and the angle of horizontal direction are 4.5 °, since front end to rear end is inclination from bottom to top.
First auxiliary material is transported to the first auxiliary material import using screw conveyor.Second auxiliary material is transported to using screw conveyor Second auxiliary material import.
After the first auxiliary material is added, the melting temperature of flying dust is reduced to 1000 DEG C, and dioxin resolution ratio reaches 99% or more;Place It sets the tail gas generated after flying dust to be discharged from air-introduced machine, respectively enters ozone+Ultraviolet Oxidation equipment, 1%NaOH solution is incorporated to after absorbing Cement kiln end bag dust arrester installation, qualified discharge after processing.Flying dust after treatment, chemical composition are mainly:Ca2 (SiO4)2、Ca8(SiO4)3、Ca12Al14O33、Ca8Mg(SiO4)4、Ca3(SiO4) O etc., and microstructure is similar with clinker, Cement mixture use is can be used as, additive amount can reach 35% or more.In flue gas by second segment evaporation, the content of potassium chloride 90% or more of salinity total amount is accounted for, can further purify and be sold as potash fertilizer.
Embodiment 2
As shown in Figure 1, a kind of method using cement kiln two stage process solid waste incineration flying dust, the method is adopted Device is a flying dust processing unit of cement kiln and the connection of cement kiln rear end, and the flying dust processing unit includes first segment It turns round steel cylinder and second segment turns round steel cylinder, the rear end of the first segment revolution steel cylinder is connect with second segment revolution steel cylinder front end, the It is interconnected inside one section of revolution steel cylinder and second segment revolution steel cylinder, and screw blade is both provided in two sections of revolution steel cylinders;Institute The front end for stating first segment revolution steel cylinder is provided with tail gas(Waste heat)Import and slag-drip opening, first segment turn round the rear end setting the of steel cylinder One auxiliary material import;The rear end of the second segment revolution steel cylinder is provided with flying dust import, the second auxiliary material import and exhanst gas outlet;It is described Smoke outlet is connected with air-introduced machine, the described method comprises the following steps:
A, adjustment first segment revolution steel cylinder and second segment revolution steel cylinder rotating speed are 35r/min, and steel cylinder is turned round from second segment Flying dust import and the second auxiliary material import in be separately added into pending flying dust and the second auxiliary material;Second auxiliary material at subpackage Include iron tailings and kaolinite;The iron tailings accounts for the 5% of flying dust quality;The kaolinite accounts for the 1% of flying dust quality;
B, the tail gas in cement kiln tail smoke-box or wicket cover is sent by flying dust processing unit front end using high temperature resistant air hose Inlet exhaust gas in, introduce tail gas initial temperature be 1100 DEG C, introduce tail gas initial air quantity be 100000m3/ h introduces tail The initial oxygen content of gas is 4.8%;
C, the first auxiliary material is added in the first auxiliary material import that first segment turns round steel cylinder, first auxiliary material includes asphalt mixtures modified by epoxy resin Fat and fluorite, epoxy resin account for the 5% of flying dust quality;Fluorite accounts for the 1.5% of flying dust quality;It is turned round in steel cylinder in second segment at this time, The exhaust temperature of introducing is reduced to 850 DEG C, and air quantity is reduced to 60000m3/ h, oxygen content are reduced to 3%.
D, the flue gas that flying dust generates after being handled in flying dust processing unit is discharged from air-introduced machine, and the direction of flying dust and flue gas is Inversely.
Flue gas respectively enters ozone+Ultraviolet Oxidation equipment after being discharged in air-introduced machine, 1% ~ 5%NaOH solution is incorporated to after absorbing Cement kiln end bag dust arrester installation, is discharged after processing.
First segment turns round steel cylinder and second segment revolution steel cylinder is respectively provided with inner lining refractory.First segment turns round steel cylinder and second Duan Huizhuan steel cylinders are cylindrical steel cylinder, draw ratio 3.5:1, the central axis of cylindrical steel cylinder and the angle of horizontal direction are 3 °, since front end to rear end is inclination from bottom to top.
First auxiliary material is transported to the first auxiliary material import using screw conveyor.Second auxiliary material is transported to using screw conveyor Second auxiliary material import.
After the first auxiliary material is added, the melting temperature of flying dust is reduced to 1100 degree, and dioxin resolution ratio reaches 99% or more;Place It sets the tail gas generated after flying dust to be discharged from air-introduced machine, respectively enters ozone+Ultraviolet Oxidation equipment, 1%NaOH solution is incorporated to after absorbing Cement kiln end bag dust arrester installation, qualified discharge after processing.Flying dust after treatment, chemical constitution is similar with clinker, Cement mixture use is can be used as, additive amount can reach 40% or more.In flue gas by second segment evaporation, the content of potassium chloride 92% or more of salinity total amount is accounted for, can further purify and be sold as potash fertilizer.

Claims (7)

1. a kind of method using cement kiln two stage process solid waste incineration flying dust, it is characterised in that:The method is adopted Device is a flying dust processing unit of cement kiln and the connection of cement kiln rear end, and the flying dust processing unit includes first segment It turns round steel cylinder and second segment turns round steel cylinder, the rear end of the first segment revolution steel cylinder is connect with second segment revolution steel cylinder front end, the It is interconnected inside one section of revolution steel cylinder and second segment revolution steel cylinder, and screw blade is both provided in two sections of revolution steel cylinders;Institute The front end for stating first segment revolution steel cylinder is provided with inlet exhaust gas and slag-drip opening, and the first auxiliary material is arranged in the rear end that first segment turns round steel cylinder Import;The rear end of the second segment revolution steel cylinder is provided with flying dust import, the second auxiliary material import and exhanst gas outlet;The flue gas goes out It is connected with air-introduced machine at mouthful, the described method comprises the following steps:
A, adjustment first segment revolution steel cylinder and second segment revolution steel cylinder rotating speed are 30 ~ 45r/min, and steel cylinder is turned round from second segment It is separately added into pending flying dust and the second auxiliary material in flying dust import and the second auxiliary material import;The ingredient of second auxiliary material includes Iron tailings and kaolinite;The iron tailings accounts for the 5% ~ 10% of flying dust quality;The kaolinite accounts for the 1% ~ 3% of flying dust quality;
B, tail gas in cement kiln tail smoke-box or wicket cover is sent into the tail of flying dust processing unit front end using high temperature resistant air hose In gas import, the initial temperature for introducing tail gas is 1000 ~ 1200 DEG C, and the initial air quantity for introducing tail gas is 50000 ~ 100000m3/ H, the initial oxygen content for introducing tail gas are 2% ~ 5%;
C, the first auxiliary material is added in the first auxiliary material import that first segment turns round steel cylinder, first auxiliary material includes epoxy resin And fluorite, epoxy resin account for the 1% ~ 5% of flying dust quality;Fluorite accounts for the 0.5% ~ 1.5% of flying dust quality;
D, the flue gas that flying dust generates after being handled in flying dust processing unit is discharged from air-introduced machine, and the direction of flying dust and flue gas is inverse To.
2. the method for processing solid waste incineration flying dust according to claim 1, it is characterised in that:
The flue gas respectively enters ozone+Ultraviolet Oxidation equipment after being discharged in air-introduced machine, 1% ~ 5%NaOH solution is incorporated to after absorbing Cement kiln end bag dust arrester installation, is discharged after processing.
3. the method for processing solid waste incineration flying dust according to claim 1, it is characterised in that:When step C is completed Afterwards, it is turned round in steel cylinder in second segment, the exhaust temperature of introducing is reduced to 750 ~ 850 DEG C, and air quantity is reduced to 20000 ~ 60000m3/ h, oxygen Content is reduced to 1% ~ 3%.
4. the method for processing solid waste incineration flying dust according to claim 1, it is characterised in that:The first segment returns Turn steel cylinder and second segment revolution steel cylinder is respectively provided with inner lining refractory.
5. the method for processing solid waste incineration flying dust according to claim 1, it is characterised in that:The first segment returns It is cylindrical steel cylinder, draw ratio 3 ~ 5 to turn steel cylinder and second segment revolution steel cylinder:1, central axis and the level side of cylindrical steel cylinder To angle be 2 ~ 6 °, be inclination from bottom to top from front end to rear end.
6. the method for processing solid waste incineration flying dust according to claim 1, it is characterised in that:First auxiliary material First auxiliary material import is transported to using screw conveyor.
7. the method for processing solid waste incineration flying dust according to claim 1, it is characterised in that:Second auxiliary material Second auxiliary material import is transported to using screw conveyor.
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CN107512856A (en) * 2017-07-21 2017-12-26 金圆水泥股份有限公司 A kind of method using cement kiln synergic processing acid-base waste fluid and abraum salt
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