CN110186056A - A kind of chemical company's dangerous waste incineration processing method - Google Patents

A kind of chemical company's dangerous waste incineration processing method Download PDF

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Publication number
CN110186056A
CN110186056A CN201910403872.5A CN201910403872A CN110186056A CN 110186056 A CN110186056 A CN 110186056A CN 201910403872 A CN201910403872 A CN 201910403872A CN 110186056 A CN110186056 A CN 110186056A
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CN
China
Prior art keywords
flue gas
processing method
chemical company
waste incineration
dangerous waste
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Pending
Application number
CN201910403872.5A
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Chinese (zh)
Inventor
胡家富
肖航
张会文
杨帆
孙淑雲
李敏
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Nanjing Hehai Environmental Research Institute Co Ltd
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Nanjing Hehai Environmental Research Institute Co Ltd
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Priority to CN201910403872.5A priority Critical patent/CN110186056A/en
Publication of CN110186056A publication Critical patent/CN110186056A/en
Pending legal-status Critical Current

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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
    • F23G5/08Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • 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
    • F23G5/32Incineration of waste; Incinerator constructions; Details, accessories or control therefor the waste being subjected to a whirling movement, e.g. cyclonic incinerators
    • 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
    • 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
    • F23G5/46Recuperation of heat
    • 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
    • F23G5/50Control or safety arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/04Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23LSUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00Heating of air supplied for combustion
    • F23L15/04Arrangements of recuperators
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The present invention relates to a kind of chemical company's dangerous waste incineration processing methods, the processing method is as follows: hazardous waste being sent into Rotation error using screw conveyor and is burned, residue falls into slag bucket from kiln tail, flue gas leads to secondary combustion chamber high-temp combustion again, and the high-temperature flue gas of discharge successively passes through air-introduced machine high altitude discharge after water cooling dust arrester, G-G heat exchanger, half dry type chilling tower, SCR denitration device, dry type reaction unit, bag filter, washing adsorbent equipment, mist water separator treatment facility.The technical solution can be used to burn simultaneously the hazardous waste of a variety of different shapes, material burns thorough, the sensitivity pollutant such as no dioxin generates, efficiently utilize high-temperature flue gas thermal energy, auxiliary fuel consumption is reduced, the qualified discharge after flue gas purification system is handled of the polluter in flue gas has system process integrated level high, the advantages that treatment effect is stablized, strong applicability.

Description

A kind of chemical company's dangerous waste incineration processing method
Technical field
The present invention relates to a kind of processing methods, and in particular to a kind of chemical company's dangerous waste incineration processing method belongs to Chemical industry hazardous waste is innoxious with minimizing processing technology field.
Background technique
Life, the fast development of chemical industry closely bound up with chemistry brings great convenience to people's life, while Cause serious pollution.The chemical industrial waste object of a large amount of solid-states, semisolid and liquid can be generated during production of chemicals, led to It is that a kind of harmfulness is extremely strong dangerous useless often with toxic, corrosivity, inflammability, reactivity, infectious one or more attributes Object, if plant area's air quality, employee's occupational health, underground water security and periphery ecological environment will be caused sternly by not dealing carefully with The harm of weight.
Currently, China mainly uses incineration method to handle chemical industry dangerous waste, have reduction significant, innoxious degree height etc. Feature is used widely in practical projects, is a kind of ideal dangerous waste disposal options.It is lacked however, there are also following Point, such as: material requirement height is burned, solid-liquid state dangerous waste mixed burning low efficiency, burning is insufficient, is also easy to produce secondary pollution, burns Burn residue flying dust is big, slag-drip opening it is easily-deformable it is stuck, fume afterheat utilization rate is low, the easy Crystallization Plugging of waste heat boiler, flue gas ash removal effect The defects of rate is low, flue gas treating process is tediously long, at high cost increases the processing cost and environmental risk of enterprise.Therefore, urgently A kind of new scheme is needed to solve above-mentioned technical problem.
Summary of the invention
The present invention exactly aiming at the problems existing in the prior art, provides a kind of chemical company's dangerous waste incineration processing side Method, the technical solution can be used to burn simultaneously the hazardous waste of a variety of different shapes, and material burns thoroughly, the sensitivities such as no dioxin Pollutant generates, and efficiently utilizes high-temperature flue gas thermal energy, reduces auxiliary fuel consumption, the polluter in flue gas is through gas cleaning Qualified discharge after system processing has the advantages that system process integrated level is high, and treatment effect is stablized, strong applicability.
To achieve the goals above, technical scheme is as follows, a kind of chemical company's dangerous waste incineration processing side Method, which is characterized in that the processing method is as follows: hazardous waste is sent into Rotation error using screw conveyor and is burnt It burns, residue falls into slag bucket from kiln tail, and flue gas leads to secondary combustion chamber high-temp combustion again, and the high-temperature flue gas of discharge successively passes through water Cold dust arrester, G-G heat exchanger, half dry type chilling tower, SCR denitration device, dry type reaction unit, bag filter, washing absorption Pass through air-introduced machine high altitude discharge after device, mist water separator treatment facility.
As an improvement of the present invention, all kinds of hazardous wastes are entered in Rotation error by screw conveyor, combustion Burning temperature is about 800-1000 DEG C, and flow direction of material is identical as flue gas flow direction in furnace, and incineration residue falls into slag from the slag notch of kiln tail Bucket, combustion product gases are discharged from tail portion;It is negative pressure state in Rotation error, material rotating direction is consistent with flue gas flow direction, kiln Tail slag notch is sealed using water seal, and incineration residue is continuously drained into slag bucket by mucking machine after the broken cooling of water.The slag notch uses Hydration sealing, the lime-ash of generation are continuously discharged after cooling water is broken by chain-plate-type slag remover, avoid the occurrence of bulk deslagging, slag notch The phenomenon that deformation or mucking machine are stuck.
As an improvement of the present invention, flue gas is introduced into after secondary combustion chamber that high-temp combustion, ignition temperature are higher than again 1100 DEG C, the residence time is greater than 2 seconds, it is ensured that the hazardous waste into incineration system sufficiently thoroughly burns completely.It is wherein secondary Combustion chamber uses the integrated poured forming of cylinder type refractory material, and import burner, combustion-supporting flame and tangential introduction of air enter two combustions Room, the residence time and large dust particle that flue gas is effectively ensured settle in dual firing chamber, and efficiency of combustion >=99.9% destroys removal by fire Rate >=99.99%.Rotation error and secondary combustion chamber are equipped with the auxiliary combustion with FSSS flame monitoring and defencive function Device, control room use scene PLC remote auto control, and when fire box temperature is lower than setting value, burner is automatically turned on, and work as burner hearth Burner is automatically closed when temperature is higher than setting value, incineration temperature needed for guaranteeing burner hearth.
As an improvement of the present invention, the high-temperature flue gas (1100 DEG C) of secondary combustion chamber discharge is passed through water cooling dust arrester, It exchanges heat with the cooling water in collet, flue-gas temperature is made to be reduced to 700 DEG C or so, while intercepting partial size in flue gas and being greater than 15u The particle floating dust of m.
As an improvement of the present invention, water cooling dust arrester exiting flue gas is discharged into G-G heat exchanger and carries out with combustion air Combustion air is preheated to 150-300 DEG C, reduces fuel consumption by heat exchange, and exit gas temperature is further reduced to 550 DEG C of left sides It is right.
As an improvement of the present invention, G-G heat exchanger exit flue gas enters half dry type chilling tower, using twin It is the ammonia solution that 10%~40%, diameter is less than 200um that spray head sprays into mass fraction in tower, with SO in flue gas2Reaction generates sulphur Barbiturates, while reduce rapidly flue-gas temperature to less than 150 DEG C, achieve the purpose that chilling and depickling.
As an improvement of the present invention, the lye sprayed into half dry type chilling tower is that 10%~40% ammonia of mass fraction is molten Liquid uses Double-fluid atomization nozzle that solution atomization is less than 200um ammonia mist for diameter, achievees the purpose that chilling and depickling;It is half-dried Formula chilling tower exiting flue gas enters SCR denitration device, vaporous ammonia mist is sprayed into, in V2O5WO3-TiO2Under honeycombed catalyst effect, Remove the NO in flue gasX;SCR denitration device exiting flue gas enters dry type reaction unit, sprays into the acid in slaked lime powder and flue gas Property gas reaction generate calcium salt and metal oxide, spray into the noxious materials such as PCDD/PCDF in active carbon powder absorption flue gas, Exit gas temperature is reduced to 130 DEG C or so.
As an improvement of the present invention, the particulate matter that dry type reaction unit should generate enters external-bay precipitator, Dust is trapped within filter bag outer surface, is shaken off the dust of retention into flue-dust retainer using pulse backblowing, bag filter setting Bypass bypasses fast open electromagnetic valve and automatically opens, flue gas is passed through by bypass line when inlet temperature is more than upper limit value, it is ensured that filter Bag is not burned;Bag filter mouth flue gas enters absorption wash mill, and matter is sprayed into device using Double-fluid atomization nozzle Measuring score is the NaOH solution that 10%~30%, diameter is less than 100um, removes HCL, SO in flue gas2Equal sour gas, while making cigarette Temperature degree is decreased to less than 80 DEG C.
As an improvement of the present invention, the absorption wash mill is followed by cyclone type mist water separator and carries out demisting, goes Except the drop being suspended in air-flow, finally by air-introduced machine by flue gas high altitude discharge.
Compared with the existing technology, the invention has the advantages that, 1) be negative pressure in Rotation error in the technical solution Burning, avoids pernicious gas from leaking, gas residence time is longer, and organic removal rate reaches 99.99% or more, effectively contains smelly Gas and oxynitrides generate, and make the flue gas free from extraneous odour generated, ordorless;2) lime-ash slag notch is close using water seal in the program Envelope, slag notch deformation and the stuck phenomenon of mucking machine caused by can avoid because of bulk deslagging;3) in the program in second-time burning room Gas mixing is abundant, and turbulivity height is without dead zone, and ignition temperature is greater than 1100 DEG C, and the residence time is greater than 2 seconds, can sufficiently decompose Harmful foul smell and multi chlor compound, inhibits the generation of dioxin;4) combustion air enters before incinerator in G-G heat exchanger and water Cold dust arrester exiting flue gas exchanges heat, and improves the charging temperature of air, reduces the consumption of fuel oil, reduces exiting flue gas temperature Degree;5) SO in flue gasX、NOX, the poisonous and harmful substances such as acid waste gas and PCDD/PCDF such as HCL removal rate reach 99% with On, meet stringent atmosphere pollutants emission standards;6) program is using high-pressure sealed small-bore spray head in second-time burning room Air feed improves the turbulivity of gas mixing, and air supply hole will not be blocked because of dust stratification or fouling;7) program combustion air exists Into incinerator it is combustion-supporting before, exchange heat in G-G heat exchanger with water cooling dust arrester exiting flue gas, improve air charging temperature, Fuel usage amount is reduced, while reducing exit gas temperature;8) external-bay precipitator is provided in dry type reaction unit, The complete calcium hydroxide powder of unreacted and active carbon are trapped within cloth bag outer surface in device and flue gas carries out secondary response, significantly Improve the removal efficiency of pernicious gas;Bag filter uses Venturi tube pulse backblowing deashing, while bypass is arranged, and works as import Not in limits, bypass solenoid valve automatically opens temperature, it is ensured that cloth bag is not burned out;9) it is sprayed into absorption wash mill Lye be 10%~30%NaOH of mass fraction solution, using Double-fluid atomization nozzle by solution atomization is diameter less than 100um Alkali mist completely removes the pollutant in flue gas, while exit gas temperature is decreased to less than 80 DEG C.
Detailed description of the invention
Fig. 1 processing technological flow figure of the present invention.
Specific embodiment:
In order to deepen the understanding of the present invention, the present embodiment is described in detail with reference to the accompanying drawing.
Embodiment 1: referring to Fig. 1, a kind of chemical company's dangerous waste incineration processing method, a kind of chemical company's hazardous waste Incineration treatment method, which is characterized in that the processing method is as follows: hazardous waste feeding rotary kiln is burnt using screw conveyor Burn in furnace and burn, residue falls into slag bucket from kiln tail, and flue gas leads to secondary combustion chamber high-temp combustion again, the high-temperature flue gas of discharge according to It is secondary by water cooling dust arrester, G-G heat exchanger, half dry type chilling tower, SCR denitration device, dry type reaction unit, bag filter, Pass through air-introduced machine high altitude discharge after washing adsorbent equipment, mist water separator treatment facility.
As an improvement of the present invention, all kinds of hazardous wastes are entered in Rotation error by screw conveyor, combustion Burning temperature is about 800-1000 DEG C, and flow direction of material is identical as flue gas flow direction in furnace, and incineration residue falls into slag from the slag notch of kiln tail Bucket, combustion product gases are discharged from tail portion;It is negative pressure state in Rotation error, material rotating direction is consistent with flue gas flow direction, kiln Tail slag notch is sealed using water seal, and incineration residue is continuously drained into slag bucket by mucking machine after the broken cooling of water.Slag notch is using hydration Sealing, the lime-ash of generation are continuously discharged after cooling water is broken by chain-plate-type slag remover, avoid the occurrence of bulk deslagging, slag notch deformation Or mucking machine the phenomenon that being stuck.Flue gas is introduced into after secondary combustion chamber high-temp combustion again, and ignition temperature is higher than 1100 DEG C, stops The time is stayed to be greater than 2 seconds, it is ensured that the hazardous waste into incineration system sufficiently thoroughly burns completely.Wherein secondary combustion chamber uses The integrated poured forming of cylinder type refractory material, import burner, combustion-supporting flame and tangential introduction of air enter dual firing chamber, are effectively ensured The residence time of flue gas and large dust particle settle in dual firing chamber, and efficiency of combustion >=99.9% destroys removal rate >=99.99% by fire. Rotation error and secondary combustion chamber are equipped with the auxiliary burner with FSSS flame monitoring and defencive function, and control room uses Live PLC remote auto control, when fire box temperature is lower than setting value, burner is automatically turned on, when fire box temperature is higher than setting value When burner be automatically closed, guarantee burner hearth needed for incineration temperature.The high-temperature flue gas (1100 DEG C) of secondary combustion chamber discharge is passed through Water cooling dust arrester exchanges heat with the cooling water in collet, so that flue-gas temperature is reduced to 700 DEG C or so, while intercepting in flue gas Partial size is greater than the particle floating dust of 15um.Water cooling dust arrester exiting flue gas is discharged into G-G heat exchanger and exchanges heat with combustion air, Combustion air is preheated to 150-300 DEG C, reduces fuel consumption, exit gas temperature is further reduced to 550 DEG C or so.G- G heat exchanger exit flue gas enters half dry type chilling tower, use Double-fluid atomization nozzle sprayed into tower mass fraction for 10%~ 40%, diameter is less than the ammonia solution of 200um, with SO in flue gas2Reaction generates Sulfates, while reduces rapidly flue-gas temperature To less than 150 DEG C, achieve the purpose that chilling and depickling.The lye sprayed into half dry type chilling tower is mass fraction 10%~40% Ammonia solution uses Double-fluid atomization nozzle that solution atomization is less than 200um ammonia mist for diameter, achievees the purpose that chilling and depickling; Half dry type chilling tower exiting flue gas enters SCR denitration device, vaporous ammonia mist is sprayed into, in V2O5WO3-TiO2Honeycombed catalyst is made Under, the NO in flue gas is removedX;SCR denitration device exiting flue gas enters dry type reaction unit, sprays into slaked lime powder and flue gas Sour gas reaction generate calcium salt and metal oxide, it is toxic to spray into PCDD/PCDF in active carbon powder absorption flue gas etc. Substance, exit gas temperature are reduced to 130 DEG C or so.The particulate matter that dry type reaction unit should generate enters outside filtering type bag-type dust Device, dust are trapped within filter bag outer surface, are shaken off the dust of retention into flue-dust retainer using pulse backblowing, bag filter is set Bypass is set, when inlet temperature is more than upper limit value, fast open electromagnetic valve is bypassed and automatically opens, flue gas is passed through by bypass line, it is ensured that Filter bag is not burned;Bag filter mouth flue gas enters absorption wash mill, is sprayed into device using Double-fluid atomization nozzle Mass fraction is the NaOH solution that 10%~30%, diameter is less than 100um, removes HCL, SO in flue gas2Equal sour gas, make simultaneously Flue-gas temperature is decreased to less than 80 DEG C.The absorption wash mill is followed by cyclone type mist water separator and carries out demisting, and removal is suspended in Drop in air-flow, finally by air-introduced machine by flue gas high altitude discharge.
It should be noted that above-described embodiment, is not intended to limit the scope of protection of the present invention, in above-mentioned technical proposal On the basis of made equivalents or substitution each fall within the range that the claims in the present invention are protected.

Claims (9)

1. a kind of chemical company's dangerous waste incineration processing method, which is characterized in that the processing method is as follows: using spiral transferring It send machine that hazardous waste is sent into Rotation error to burn, residue falls into slag bucket from kiln tail, and flue gas leads to secondary combustion chamber again Secondary high-temp combustion, the high-temperature flue gas of discharge successively pass through water cooling dust arrester, G-G heat exchanger, half dry type chilling tower, SCR denitration dress Set, dry type reaction unit, bag filter, washing adsorbent equipment, after mist water separator treatment facility by the high idle discharge of air-introduced machine It puts.
2. chemical company's dangerous waste incineration processing method according to claim 1, which is characterized in that all kinds of hazardous wastes Entered in Rotation error by screw conveyor, ignition temperature is about 800-1000 DEG C, flow direction of material and flue gas stream in furnace To identical, incineration residue falls into slag bucket from the slag notch of kiln tail, and combustion product gases are discharged from tail portion;It is negative pressure in Rotation error State, material rotating direction is consistent with flue gas flow direction, kiln tail slag notch using water seal seal, incineration residue after the broken cooling of water by Mucking machine is continuously drained into slag bucket.
3. chemical company's dangerous waste incineration processing method according to claim 2, which is characterized in that flue gas is introduced into two High-temp combustion, ignition temperature are higher than 1100 DEG C again behind secondary combustion chamber, and the residence time is greater than 2 seconds, and wherein secondary combustion chamber uses The integrated poured forming of cylinder type refractory material, import burner, combustion-supporting flame and tangential introduction of air enter dual firing chamber, are effectively ensured The residence time of flue gas and large dust particle settle in dual firing chamber, and efficiency of combustion >=99.9% destroys removal rate >=99.99% by fire.
4. chemical company's dangerous waste incineration processing method according to claim 3, which is characterized in that the second-time burning High-temperature flue gas i.e. 1100 DEG C of room discharge are passed through water cooling dust arrester, exchange heat with the cooling water in collet, drop flue-gas temperature As low as 700 DEG C or so, while intercepting the particle floating dust that partial size in flue gas is greater than 15um.
5. chemical company's dangerous waste incineration processing method according to claim 4, which is characterized in that the water cooling dust Device exiting flue gas is discharged into G-G heat exchanger and exchanges heat with combustion air, and combustion air is preheated to 150-300 DEG C, reduces combustion Expect that consumption, exit gas temperature are further reduced to 550 DEG C or so.
6. chemical company's dangerous waste incineration processing method according to claim 5, which is characterized in that the G-G heat exchange Device exiting flue gas enters half dry type chilling tower, use Double-fluid atomization nozzle sprayed into tower mass fraction for 10%~40%, it is straight Diameter is less than the ammonia solution of 200um, with SO in flue gas2Reaction generate Sulfates, while make flue-gas temperature reduce rapidly to less than 150 DEG C, achieve the purpose that chilling and depickling.
7. chemical company's dangerous waste incineration processing method according to claim 6, which is characterized in that in half dry type chilling The lye sprayed into tower is 10%~40% ammonia solution of mass fraction, and Double-fluid atomization nozzle is used to be less than solution atomization for diameter 200um ammonia mist, achievees the purpose that chilling and depickling;Half dry type chilling tower exiting flue gas enters SCR denitration device, sprays into vaporous ammonia Mist, in V2O5WO3-TiO2Under honeycombed catalyst effect, the NO in flue gas is removedX;SCR denitration device exiting flue gas enters dry type Reaction unit sprays into slaked lime powder and reacts generation calcium salt and metal oxide with the sour gas in flue gas, sprays into active powdered carbon Noxious materials, the exit gas temperatures such as the PCDD/PCDF in end absorption flue gas are reduced to 130 DEG C or so.
8. chemical company's dangerous waste incineration processing method according to claim 7, which is characterized in that dry type reaction unit The particulate matter that should be generated enters external-bay precipitator, and dust is trapped within filter bag outer surface, will be retained using pulse backblowing Dust shake off into flue-dust retainer, bag filter setting bypass, when inlet temperature be more than upper limit value when, bypass fast open electromagnetic valve It automatically opens, flue gas is passed through by bypass line, it is ensured that filter bag is not burned;Bag filter mouth flue gas enters absorption washing dress It sets, Double-fluid atomization nozzle is used to spray into the NaOH solution that mass fraction is less than 100um for 10%~30%, diameter in device, Remove HCL, SO in flue gas2Equal sour gas, while flue-gas temperature being made to be decreased to less than 80 DEG C.
9. chemical company's dangerous waste incineration processing method according to claim 8, which is characterized in that the absorption washing Device is followed by cyclone type mist water separator and carries out demisting, removes the drop that is suspended in air-flow, finally by air-introduced machine by flue gas High altitude discharge.
CN201910403872.5A 2019-05-15 2019-05-15 A kind of chemical company's dangerous waste incineration processing method Pending CN110186056A (en)

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CN113798307B (en) * 2021-09-15 2022-08-23 浙江伊诺环保科技股份有限公司 Treatment process for recycling fly ash through high-temperature melting

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Application publication date: 20190830