CN106895412A - A kind of method of utilization cement kiln two-part disposal of solid castoff burning flying dust - Google Patents

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

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Publication number
CN106895412A
CN106895412A CN201710260206.1A CN201710260206A CN106895412A CN 106895412 A CN106895412 A CN 106895412A CN 201710260206 A CN201710260206 A CN 201710260206A CN 106895412 A CN106895412 A CN 106895412A
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flying dust
steel cylinder
auxiliary
import
cement kiln
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CN106895412B (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 method of utilization cement kiln two stage process solid waste incineration flying dust, the flying dust processing unit that the device for using is connected for cement kiln and cement kiln rear end, the device includes that first paragraph turns round steel cylinder and second segment revolution steel cylinder, comprises the following steps:Pending flying dust and the second auxiliary material is separately added into from the flying dust import and the second auxiliary material import of second segment revolution steel cylinder;By in the inlet exhaust gas of the tail gas feeding flying dust processing unit front end in cement kiln tail smoke-box or wicket cover;The first auxiliary material is added in the first auxiliary material import of first paragraph revolution steel cylinder;The flue gas that flying dust is produced after being processed in flying dust processing unit is discharged from air-introduced machine.The method utilizes cement kiln therrmodynamic system, cement kiln thermal source is combined with the disposal of solid waste incineration flying dust, can not only make full use of the heat energy of cement kiln, and can quickly, safety, low-cost, high-volume disposal flying dust, substantially reduce the cost of flying dust treatment.

Description

A kind of method of utilization cement kiln two-part disposal of solid castoff burning flying dust
Technical field
Field is recycled the present invention relates to solid waste, in particular for cement kiln synergic processing solid waste incineration The tail gas two stage process solid waste incineration flying dust of the treatment technology of flying dust, specially a kind of utilization cement kiln and its generation Method.
Background technology
With the development of social economy, Process of Urbanization aggravation, many big and medium-sized cities of China meet with " garbage-surrounded city ", " dirt The multiple puzzlements such as mud disposal ".Solid waste treatment typically has 3 kinds of modes:Landfill, burning and compost, current China's solid give up Gurry treatment is still used based on filling, the measure supplemented by compost and burning, and this will take substantial amounts of land resource.With landing The rising of valency, the continuous improvement of urban environment requirement, landfill becomes no longer economic and safety, and increasing city starts to consider Burning disposal.Burning disposal can make solid waste volume reduce 80~90%, and with processing speed is fast, floor space Small, minimizing and innoxious efficiency high, and the advantages of recovering energy source, some economic levels it is higher, refuse thermal value is high, soil The city of resource-constrained, will be widely applied.
However, solid waste incineration unavoidably produces flying dust.Containing substantial amounts of heavy metal He bioxin, quilt in flying dust Referred to as extra quality pollutant.Research finds that content of beary metal accounts for 1%~9% in flying dust, and the leaching level of each heavy metal species reaches The judging standard of hazardous waste, may produce serious toxic action to environment, therefore, flying dust is all classified as dangerous useless by countries in the world Thing, must be processed 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 stipulated that:" flying dust that consumer waste incineration is produced must be received individually Collection ";" domestic garbage incineration flyash can be transported after grown place must carry out necessary solidification and stabilization processes ";It is " raw Incineration of refuse flyash living must carry out security landfill disposal ".Therefore, domestic garbage incineration flyash landfill or recycling before, it is right The treatment 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 is entered again after the chlorine element in flying dust is typically removed using washing Enter cement kiln burning, this technological accumulation and inheritance safety, but disposing technique is cumbersome, and disposal amount is small and cost is higher.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of quick, safety, the skill of low-cost, high-volume disposal flying dust Art.
A kind of method of utilization cement kiln two stage process solid waste incineration flying dust, the device that methods described is used for Cement kiln and cement kiln rear end connection a flying dust processing unit, the flying dust processing unit include first paragraph revolution steel cylinder and Second segment turns round steel cylinder, and the rear end of the first paragraph revolution steel cylinder is connected with second segment revolution steel cylinder front end, first paragraph revolution steel Cylinder and second segment revolution steel cylinder inside are interconnected, and are provided with propeller blade in two sections of revolution steel cylinders;The first paragraph is returned The front end for turning steel cylinder is provided with inlet exhaust gas and slag-drip opening, and the rear end of first paragraph revolution steel cylinder sets the first auxiliary material import;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 paragraph revolution steel cylinder and second segment revolution steel cylinder rotating speed are 30~45r/min, from second segment revolution Pending flying dust and the second auxiliary material is separately added into the flying dust import of steel cylinder and the second auxiliary material import;Second auxiliary material into Dividing includes iron tailings and kaolinite;The iron tailings accounts for the 5%~10% of flying dust quality;The kaolinite accounts for flying dust quality 1%~3%;
B, using high temperature resistant airduct by the tail gas feeding flying dust processing unit front end in cement kiln tail smoke-box or wicket cover Inlet exhaust gas in, the initial temperature for introducing tail gas is 1000~1200 DEG C, introduce the initial air quantity of tail gas for 50000~ 100000m3/ h, the initial oxygen content for introducing tail gas is 2%~5%;
C, in the first auxiliary material import of first paragraph revolution steel cylinder add the first auxiliary material, 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;
The flue gas that D, flying dust are produced after being processed in flying dust processing unit is discharged from air-introduced machine, and flying dust is with the direction of flue gas Inversely.
Further, the flue gas respectively enters ozone+Ultraviolet Oxidation equipment, 1%~5% after being discharged from air-introduced machine NaOH solution is incorporated to cement kiln end bag dust arrester installation after absorbing, discharged after treatment.
Further, after the completion of step C, in second segment revolution steel cylinder, the exhaust temperature of introducing is reduced to 750~850 DEG C, air quantity is reduced to 20000~60000m3/ h, oxygen content is reduced to 1%~3%.
Further, the first paragraph revolution steel cylinder and second segment revolution steel cylinder are respectively provided with inner lining refractory.
Further, the first paragraph 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 conveying worm.
Further, second auxiliary material is transported to the second auxiliary material import using conveying worm.
The present invention adds flying dust and the second auxiliary material in second segment rotation steel cylinder, and the main component of the second auxiliary material is:Iron tail Ore deposit and kaolinite.Adding the Main Function of the second auxiliary material is:(1) heavy metal in the flue gas that the volatilization of absorption first paragraph is produced;(2) Form the mineral facies of similar clinker;(3) the volatilization feature of the material in flying dust, evaporates the potassium chloride in flying dust Salt.The addition of flying dust and the second auxiliary material will be carried out before tail gas introducing, and the addition of flying dust and the second auxiliary material is before addition Just the relevant parameter according to the tail gas for introducing is calculated, and the initial temperature for introducing tail gas is 1000~1200 DEG C, with reaction Carrying out, flying dust and the second auxiliary material enter heat exchange, temperature of the final tail gas in second segment revolution steel cylinder with the tail gas for introducing The treatment of flying dust reaches preferable technique effect when dropping to 750~850 DEG C, to reach this temperature, adding such as flying dust and Addition will be calculated before second auxiliary material.The initial air quantity for introducing tail gas is 50000~100000m3/ h, because revolution The setting of the rotating speed of steel cylinder and the addition of auxiliary material, air quantity of the final tail gas in second segment revolution steel cylinder drop to 20000~ 60000m3The treatment of flying dust reaches preferable technique effect during/h.
In the first paragraph 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 Fat and fluorite mixture, the Main Function of fluorite are the melt temperatures for reducing flying dust, and the Main Function of epoxy resin is acceleration two The decomposition of Evil English;After adding the first auxiliary material, the melt temperature of flying dust is reduced to 1000~1100 DEG C of , bioxin resolution ratios and reaches More than 99%.Introduce tail gas initial oxygen content be 2%~5%, add the first auxiliary material after with bioxin removing Consumption, when oxygen content of the tail gas in second segment revolution steel cylinder drops to 1%~3%, the treatment of flying dust reaches preferable technology Effect.
Beneficial effects of the present invention:
1) the method utilizes cement kiln therrmodynamic system, and cement kiln thermal source is mutually tied with the disposal of solid waste incineration flying dust Close, can not only make full use of the heat energy of cement kiln, and can quickly, safely, low-cost, high-volume disposal flying dust, significantly Reduce the cost of flying dust treatment.
2) flying dust after treatment, its chemical constitution is similar with clinker, can be used as cement mixture, addition Amount can reach more than 35%.
Invention is described in detail with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is the winged disposal plant structural representation of present invention ash;
The ash that Fig. 2 is flies disposing task schematic diagram.
Specific embodiment
As depicted in figs. 1 and 2, a kind of method of utilization cement kiln two stage process solid waste incineration flying dust, described The flying dust processing unit that the device that method is used is connected for cement kiln and cement kiln rear end 1, the flying dust processing unit bag First paragraph revolution steel cylinder 2 and second segment revolution steel cylinder 3 are included, before steel cylinder is turned round in the rear end of the first paragraph revolution steel cylinder with second segment End connection, first paragraph revolution steel cylinder and second segment revolution steel cylinder inside are interconnected, and are provided with spiral shell in two sections of revolution steel cylinders Rotation blade 201 and 301;The front end of the first paragraph revolution steel cylinder is provided with tail gas (waste heat) import 202 and slag-drip opening 203, the The rear end of one section of revolution steel cylinder sets the first auxiliary material import 204;The rear end of the second segment revolution steel cylinder is provided with flying dust import 302nd, the second auxiliary material import 303 and exhanst gas outlet 304;The smoke outlet is connected with air-introduced machine (not shown), described Method is comprised the following steps:
A, adjustment first paragraph revolution steel cylinder and second segment revolution steel cylinder rotating speed are 30~45r/min, from second segment revolution Pending flying dust and the second auxiliary material is separately added into the flying dust import of steel cylinder and the second auxiliary material import;Second auxiliary material into Dividing includes iron tailings and kaolinite;The iron tailings accounts for the 5%~10% of flying dust quality;The kaolinite accounts for flying dust quality 1%~3%;
B, using high temperature resistant airduct by the tail gas feeding flying dust processing unit front end in cement kiln tail smoke-box or wicket cover Inlet exhaust gas in, the initial temperature for introducing tail gas is 1000~1200 DEG C, introduce the initial air quantity of tail gas for 50000~ 100000m3/ h, the initial oxygen content for introducing tail gas is 2%~5%;
C, in the first auxiliary material import of first paragraph revolution steel cylinder add the first auxiliary material, 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;Now second In Duan Huizhuan steel cylinders, 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%.
The flue gas that D, flying dust are produced after being processed in flying dust processing unit is discharged from air-introduced machine, and flying dust is with the direction of flue gas Inversely.
Flue gas respectively enters ozone+Ultraviolet Oxidation equipment, the absorption of 1%~5%NaOH solution after being discharged from air-introduced machine after Cement kiln end bag dust arrester installation is incorporated to, is discharged after treatment.
First paragraph turns round steel cylinder and second segment revolution steel cylinder is respectively provided with inner lining refractory.First paragraph 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 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 conveying worm.Second auxiliary material is transported to using conveying worm Second auxiliary material import.
The solid waste includes domestic waste, sludge, old rubbish.
Embodiment 1
As shown in figure 1, a kind of method of utilization cement kiln two stage process solid waste incineration flying dust, methods described 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 paragraph Revolution steel cylinder and second segment revolution steel cylinder, the rear end of the first paragraph revolution steel cylinder are connected with second segment revolution steel cylinder front end, the One section of revolution steel cylinder and second segment revolution steel cylinder inside are interconnected, and are provided with propeller blade in two sections of revolution steel cylinders;Institute The front end for stating first paragraph revolution steel cylinder is provided with tail gas (waste heat) import and slag-drip opening, and the rear end of first paragraph revolution steel cylinder sets the 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 paragraph revolution steel cylinder and second segment revolution steel cylinder rotating speed are 30r/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 into 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, using high temperature resistant airduct by the tail gas feeding flying dust processing unit front end in cement kiln tail smoke-box or wicket cover 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, in the first auxiliary material import of first paragraph revolution steel cylinder add the first auxiliary material, 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 0.5% of flying dust quality;Now 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 is reduced to 1.8%.
The flue gas that D, flying dust are produced after being processed in flying dust processing unit is discharged from air-introduced machine, and flying dust is with the direction of flue gas Inversely.
Flue gas respectively enters ozone+Ultraviolet Oxidation equipment, the absorption of 1%~5%NaOH solution after being discharged from air-introduced machine after Cement kiln end bag dust arrester installation is incorporated to, is discharged after treatment.
First paragraph turns round steel cylinder and second segment revolution steel cylinder is respectively provided with inner lining refractory.First paragraph 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 is with the angle of horizontal direction 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 conveying worm.Second auxiliary material is transported to using conveying worm Second auxiliary material import.
After adding the first auxiliary material, the melt temperature of flying dust is reduced to 1000 DEG C, and dioxin resolution ratio reaches more than 99%;Place Put the tail gas produced after flying dust to be discharged from air-introduced machine, respectively enter after ozone+Ultraviolet Oxidation equipment, 1%NaOH solution absorb simultaneously Enter cement kiln end bag dust arrester installation, qualified discharge after treatment.Flying dust after treatment, its chemical composition is mainly:Ca2 (SiO4)2、Ca8(SiO4)3、Ca12Al14O33、Ca8Mg(SiO4)4、Ca3(SiO4) O etc., and microstructure is similar with clinker, Can be used as cement mixture, addition can reach more than 35%.In flue gas by second segment evaporation, the content of potassium chloride More than the 90% of salinity total amount is accounted for, can further be purified and be sold as potash fertilizer.
Embodiment 2
As shown in figure 1, a kind of method of utilization cement kiln two stage process solid waste incineration flying dust, methods described 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 paragraph Revolution steel cylinder and second segment revolution steel cylinder, the rear end of the first paragraph revolution steel cylinder are connected with second segment revolution steel cylinder front end, the One section of revolution steel cylinder and second segment revolution steel cylinder inside are interconnected, and are provided with propeller blade in two sections of revolution steel cylinders;Institute The front end for stating first paragraph revolution steel cylinder is provided with tail gas (waste heat) import and slag-drip opening, and the rear end of first paragraph revolution steel cylinder sets the 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 paragraph 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 into 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, using high temperature resistant airduct by the tail gas feeding flying dust processing unit front end in cement kiln tail smoke-box or wicket cover 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, in the first auxiliary material import of first paragraph revolution steel cylinder add the first auxiliary material, 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;Now steel cylinder is turned round in second segment In, the exhaust temperature of introducing is reduced to 850 DEG C, and air quantity is reduced to 60000m3/ h, oxygen content is reduced to 3%.
The flue gas that D, flying dust are produced after being processed in flying dust processing unit is discharged from air-introduced machine, and flying dust is with the direction of flue gas Inversely.
Flue gas respectively enters ozone+Ultraviolet Oxidation equipment, the absorption of 1%~5%NaOH solution after being discharged from air-introduced machine after Cement kiln end bag dust arrester installation is incorporated to, is discharged after treatment.
First paragraph turns round steel cylinder and second segment revolution steel cylinder is respectively provided with inner lining refractory.First paragraph 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 is with the angle of horizontal direction 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 conveying worm.Second auxiliary material is transported to using conveying worm Second auxiliary material import.
After adding the first auxiliary material, the melt temperature of flying dust is reduced to 1100 degree, and dioxin resolution ratio reaches more than 99%;Place Put the tail gas produced after flying dust to be discharged from air-introduced machine, respectively enter after ozone+Ultraviolet Oxidation equipment, 1%NaOH solution absorb simultaneously Enter cement kiln end bag dust arrester installation, qualified discharge after treatment.Flying dust after treatment, its chemical constitution and clinker class Seemingly, can be used as cement mixture, addition can reach more than 40%.In flue gas by second segment evaporation, potassium chloride Content accounts for more than the 92% of salinity total amount, can further purify and be sold as potash fertilizer.

Claims (7)

1. a kind of method of utilization cement kiln two stage process solid waste incineration flying dust, it is characterised in that:Methods described 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 paragraph Revolution steel cylinder and second segment revolution steel cylinder, the rear end of the first paragraph revolution steel cylinder are connected with second segment revolution steel cylinder front end, the One section of revolution steel cylinder and second segment revolution steel cylinder inside are interconnected, and are provided with propeller blade in two sections of revolution steel cylinders;Institute The front end for stating first paragraph revolution steel cylinder is provided with inlet exhaust gas and slag-drip opening, and the rear end of first paragraph revolution steel cylinder sets the first 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;The flue gas goes out Air-introduced machine is connected with mouthful, be the described method comprises the following steps:
A, adjustment first paragraph revolution steel cylinder and second segment revolution steel cylinder rotating speed are 30 ~ 45r/min, from second segment revolution steel cylinder Pending flying dust and the second auxiliary material is separately added into flying dust import and the second auxiliary material import;The composition 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, the tail that the tail gas in cement kiln tail smoke-box or wicket cover is sent into flying dust processing unit front end using high temperature resistant airduct 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 is 2% ~ 5%;
C, in the first auxiliary material import of first paragraph revolution steel cylinder add the first auxiliary material, first auxiliary material includes epoxy resin And fluorite, epoxy resin accounts for the 1% ~ 5% of flying dust quality;Fluorite accounts for the 0.5% ~ 1.5% of flying dust quality;
The flue gas that D, flying dust are produced after being processed in flying dust processing unit is discharged from air-introduced machine, and flying dust is inverse with the direction of flue gas To.
2. it is according to claim 1 treatment solid waste incineration flying dust method, it is characterised in that:
The flue gas is respectively enterd after ozone+Ultraviolet Oxidation equipment, 1% ~ 5%NaOH solution absorb after being discharged from air-introduced machine and is incorporated to Cement kiln end bag dust arrester installation, discharges after treatment.
3. it is according to claim 1 treatment solid waste incineration flying dust method, it is characterised in that:When step C is completed Afterwards, in second segment revolution 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 is reduced to 1% ~ 3%.
4. it is according to claim 1 treatment solid waste incineration flying dust method, it is characterised in that:The first paragraph is returned Turn steel cylinder and second segment revolution steel cylinder is respectively provided with inner lining refractory.
5. it is according to claim 1 treatment solid waste incineration flying dust method, it is characterised in that:The first paragraph is returned Turn steel cylinder and second segment revolution steel cylinder is cylindrical steel cylinder, draw ratio 3 ~ 5:1, 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. it is according to claim 1 treatment solid waste incineration flying dust method, it is characterised in that:First auxiliary material First auxiliary material import is transported to using conveying worm.
7. it is according to claim 1 treatment solid waste incineration flying dust method, it is characterised in that:Second auxiliary material Second auxiliary material import is transported to using conveying worm.
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CN107445497A (en) * 2017-07-21 2017-12-08 金圆水泥股份有限公司 It is a kind of using cement kiln synergic processing rectification residue, tar, useless pitch method
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CN108083287B (en) * 2017-12-27 2019-07-05 杨松 It is a kind of to prepare kaolin production line application method

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