CN110252036A - Baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integral treatment method and system - Google Patents

Baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integral treatment method and system Download PDF

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Publication number
CN110252036A
CN110252036A CN201910569325.4A CN201910569325A CN110252036A CN 110252036 A CN110252036 A CN 110252036A CN 201910569325 A CN201910569325 A CN 201910569325A CN 110252036 A CN110252036 A CN 110252036A
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China
Prior art keywords
flue gas
flue
deduster
bed reactor
air
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CN201910569325.4A
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Chinese (zh)
Inventor
刘竹昕
宋海琛
丁大勇
李雪娇
王文博
赵劲松
艾秀娟
汪林
胡红胜
刘雅峰
胡红武
许海飞
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SHENYANG BOYU TECHNOLOGY Co.,Ltd.
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Shenyang Aluminum and Magnesium Technology Co Ltd
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Priority to CN201910569325.4A priority Critical patent/CN110252036A/en
Publication of CN110252036A publication Critical patent/CN110252036A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/06Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
    • B01D53/10Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents
    • B01D53/12Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents according to the "fluidised technique"
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/56Nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10Inorganic adsorbents
    • B01D2253/104Alumina
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/20Halogens or halogen compounds
    • B01D2257/204Inorganic halogen compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/20Halogens or halogen compounds
    • B01D2257/204Inorganic halogen compounds
    • B01D2257/2047Hydrofluoric acid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/70Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/704Solvents not covered by groups B01D2257/702 - B01D2257/7027
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The present invention relates to smoke gas treatment field more particularly to a kind of baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integral treatment method and systems.This method uses thermal accumulating incinerator+denitration+alkalinity Dry Adsorption, thoroughly handles baking flue gas pollutant.The structure of the system is as follows: roaster exhaust pass divides two-way: setting gradually filter, thermal accumulating incinerator, deduster flue, circulating fluid bed reactor, deduster, deduster rear pass, air-introduced machine, chimney on the way, another way passes sequentially through accident flue one, accident flue three is connected with the lower part in chimney, accident flue one is connected by a pipeline with deduster flue, and accident flue one is also connected by accident flue two with deduster rear pass.Present invention is mainly applied to newly-built anode-baking flue gas administration project, the upgrading project of existing anode-baking flue gas, the desulfurization process projects of boiler and other flue gases.

Description

Baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integral treatment method and System
Technical field
The present invention relates to smoke gas treatment field more particularly to a kind of baking flue gas defluorinate, dedusting, depitching cigarette, desulfurization, take off Nitre integral treatment method and system are mainly used in newly-built anode-baking flue gas administration project, existing anode-baking flue gas Upgrading project, the desulfurization process project of boiler and other flue gases.
Background technique
The major pollutants of carbon element factory are the baking flue gas of generation during anode-baking in aluminum electrolysis industry, wherein containing The harmful components such as glance coal, dust, fluoride, sulfur dioxide, nitrogen oxides, BaP.With the raising of national environmental standard, Country requires to be increasingly stringenter to various pollutants discharge index, and many newly-built and existing enterprises are faced with huge environmental protection pressure Power.The ingredient increase of sulphur causes content of sulfur dioxide in roaster exiting flue gas to be sharply increased in carbon raw material in the market, makes The sulfur dioxide gas that must be discharged is higher than the requirement of national emission standard.In the region that individual pollutant catabolic genes are stringent, in addition into Row overall control, it is also desirable to specially treated be carried out to the sour gas such as hydrogen fluoride, sulfur dioxide and nitrogen oxides, keep it remote low It is discharged in the requirement of national emission concentration standard.
Currently, baking flue gas purified treatment use main method have it is following several:
(1) electrical tar precipitator+dry method technique
By the baking flue gas generated from roaster by electrical tar precipitator trapping tar and dust, using alumina dry Method is adsorbed and removed hydrogen fluoride gas therein.
This method can get rid of tar, BaP, dust and fluoride in flue gas, but not can be removed flue gas In sulfur dioxide and nitrogen oxides, and the tar that electrical tar precipitator traps belongs to danger wastes, needs to carry out it Secondary treatment.
(2) wet sprinkling+electrical tar precipitator
The baking flue gas generated from roaster is passed through into cooling tower wet scrubbing, removes wherein hydrogen fluoride and titanium dioxide Sulphur removes dust and tar therein using electrical tar precipitator.
This method can get rid of tar, sulfur dioxide, fluoride and part dust in baking flue gas, but can not The BaP and nitrogen oxides in flue gas are got rid of, and the tar that dust and trapping are got off needs secondary treatment.
(3) burning+aluminium oxide dry method technique
The baking flue gas come from roaster is removed into tar and BaP therein by thermal accumulating incinerator, using dry Method removes the pernicious gases such as fluoride and dust therein.
This method not can be removed sulfur dioxide and nitrogen oxides in flue gas equally.
All there is system energy consumptions that higher, secondary pollution is difficult to handles, equipment investment is high, at pollutant for above-mentioned several method Reason be not thorough, equipment seriously corroded the disadvantages of.
Meanwhile with the development of carbon industry, pollutant emission standard may be dressed eventually to world standard, electrolytic aluminium Factory's chimney dust emission reaches 5mg/Nm3, total fluorine, which discharges, reaches 0.8mg/Nm3, discharged nitrous oxides reach 100mg/Nm3, dioxy Change sulphur emissions and reaches 50mg/Nm3, tar content reaches 5mg/Nm3Final goal value.Therefore, it is necessary to develop a kind of new roasting Gas cleaning Processing tecchnics are to handle the baking flue gas that newly-built carbon element factory generates, or carry out to existing roasting flue gas clarification system Comprehensive upgrading, to meet the needs with the following national environmental standard now.
Summary of the invention
The purpose of the present invention is to provide at a kind of baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integration Method and system is managed, solves in the prior art that system energy consumption is higher, secondary pollution is difficult to handle, equipment investment is high, at pollutant Reason be not thorough, equipment seriously corroded the problems such as.
The technical scheme is that
A kind of baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integral treatment method, using heat accumulating type incineration Furnace+denitration+alkalinity Dry Adsorption thoroughly handles baking flue gas pollutant, and concrete processing procedure is as follows:
Baking flue gas passes through roaster exhaust pass first, and the filter being arranged in piping filters out part dust And tar, thermal accumulating incinerator is entered back into, tar and BaP in flue gas is disposed using the combustion gas that incinerator is added, is storing The reductant nozzle of hot type incinerator high-temperature region sprays into NOx reducing agent, completes nitrogen oxides treatment;Thermal accumulating incinerator In flue gas enter circulating fluid bed reactor by deduster flue, adsorbent is added in circulating fluid bed reactor, it is cold Water through water pump and cold water water jet be added to circulating fluid bed reactor carry out decreasing temperature and increasing humidity, in circulating fluid bed reactor with Alkaline particle completes adsorption reaction under the atomized water effect of penetrating;Flue gas and alkaline particle after adsorption reaction enter Deduster completes filtering and reaches gas solid separation purpose, and treated flue gas qualified discharge, flue gas is through deduster rear pass and air inducing Machine is discharged into atmosphere by chimney, the innoxious landfill disposal of the dust filtered out.
The baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integral treatment method, adsorbent is by tank car A dozen expect material bin, then are added to air-driven chute two by rotatory feeder valve two, are added to circulating fluid bed reactor, are recycling Enter deduster together after completing adsorption reaction with flue gas in fluidized-bed reactor;Gas solid separation is completed in deduster, is filtered The adsorbent fallen enters Pneumatic lift or pressurized tank by air-driven chute one, and roots blower provides power, by the absorption after reaction Agent is promoted to storehouse is returned to, and subsequent processing is carried out in tank car three by expecting under rotatory feeder valve three.
The baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integral treatment method, thermal accumulating incinerator The reducing agent of interior injection is transported to reducing agent storage tank by tank car three, and the high-temperature region of thermal accumulating incinerator, completion pair are sprayed into through nozzle Nitrogen oxides restores in furnace;The adsorbent separated from deduster partially enters air-driven chute three by rotatory feeder valve one, It is transported in circulating fluid bed reactor by air-driven chute three again.
A kind of baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system, specific structure are as follows:
Roaster exhaust pass divides two-way: setting gradually filter on the way, thermal accumulating incinerator, deduster flue, follows Circulation fluidized bed reactor, deduster, deduster rear pass, air-introduced machine, chimney, another way pass sequentially through accident flue one, accident Flue three is connected with the lower part in chimney, and accident flue one is connected by a pipeline with deduster flue, accident flue One is also connected by accident flue two with deduster rear pass.
The baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system, thermal accumulating incinerator Among filter and circulating fluid bed reactor, the upper pyrometer area in thermal accumulating incinerator is equipped with reductant nozzle, reduction Agent nozzle is connected by pipeline with the bottom of reducing agent storage tank, and the top of reducing agent storage tank by pipeline and holds reducing agent Tank car two is connected, and reductant nozzle continuously sprays reducing agent, and the nitrogen oxides in effluent for entering thermal accumulating incinerator is restored For N2
The baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system, water pump pass through pipeline Cold water water jet is connected, cold water water jet is set in circulating fluid bed reactor, and atomization is sprayed into circulating fluid bed reactor Cooling water;The top of material bin is connected by pipeline with tank car one, and the bottom of material bin passes through pipeline and air-driven chute two One end is connected, and the other end of air-driven chute two is connected with the lower part in circulating fluid bed reactor.
The baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system, water pump pass through pipeline Emergency spray mouth is connected, emergency spray mouth is located in accident flue one, and cold water is connected to emergency spray mouth, accident through water pump and pipeline Flue one sprays into interior cooling water, and the case where flue kindling occurs in emergency processing.
The baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system, deduster, which is located at, to follow Between circulation fluidized bed reactor and air-introduced machine, the bottom of deduster is connected by a pipeline with one end of air-driven chute three, The other end of air-driven chute three is connected with the lower part in circulating fluid bed reactor;The bottom of deduster by another pipeline with One end of air-driven chute one is connected, and the other end of air-driven chute one passes through the top in pipeline and Pneumatic lift or pressurized tank It is connected;Top in Pneumatic lift or pressurized tank also passes through to be connected at the top of pipeline and return storehouse, returns to the bottom in storehouse It is connected by pipeline with tank car three, the bottom in Pneumatic lift or pressurized tank is connected by pipeline with roots blower.
The baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system, the absorption in system Agent is alkali grain, and alkali grain is Ca (OH)2、CaCO3、MgCO3、Mg(OH)2With mixing for one or more of NaOH Object is closed, alkali grain partial size is 1 μm~2cm;Alternatively, adsorbent is the mixture based on CaO, MgO oxide in system, or Add the form of mixtures of metallic catalyst.
The baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system, the reduction in system Agent is ammonia NH3, urea (CO (NH2)2), hydrogen propylhomoserin ((HCNO)3) or other be modified amino reductive.
Design philosophy of the invention is:
In order to handle the pollutant component of baking flue gas complexity, the present invention is special to use baking flue gas integrated treatment technology. The flue gas come from roaster first passes around glance coal, Benzpyrene in thermal accumulating incinerator (RTO) removal flue gas;It is sprayed in RTO Enter special denitrfying agent, carry out the denitration of high-temperature selective non-catalytic reduction, removes the nitrogen oxides in flue gas;It is excluded from RTO Flue gas enters circulating fluid bed semi-drying method desulfurization (CFD) system or NID (New Integrated Desulfurization) is dry Method desulfurization technology, the Ca (OH) with addition2Sulfur dioxide in flue gas is disposed in powdered reaction;Flue gas enters back into bag filter, The dust in flue gas is filtered out, purified flue gas is discharged into atmosphere using blower and chimney.The reaction of sulfur dioxide is adsorbed Object carries out landfill or building materials use, and can carry out heat recovery by the high-temperature flue gas of RTO.
The invention has the advantages and beneficial effects that:
1, the present invention is suitable for the purification of carbon element factory's baking flue gas, is also applied for generating tar, dust in production process and contain The industry of sour gas or field, such as: coking.The present invention removes dust, tar, BaP, hydrogen fluoride, dioxy in flue gas Change the pollutants such as sulphur and nitrogen oxides, is a kind of integrated approach for administering multi-pollutant gas.
2, the thorough improvement to organic pollutant can be achieved in the present invention, especially handles the flue gas of all kinds of complicated components, is Stability of uniting is high;Equipment, pipeline, chimney are corrosion-free, prevent secondary pollution, and plant maintenance is convenient, and automatic control level is high.Currently, roasting Burn flue gas integrated treatment technology carried out fissionization experiment and engineering apply, the technology of progress integrate application study with Marketing, market prospects with higher.
Detailed description of the invention
Fig. 1 is the flow diagram of the embodiment of the present invention 1.
In figure: 1, roaster exhaust pass;2, thermal accumulating incinerator;3, deduster flue;4, circulating fluid bed reactor; 5, deduster;6, deduster rear pass;7, air-introduced machine;8, accident flue one;9, accident flue two;10, accident flue three;11, Centrifugal high pressure fan;12, roots blower;13, Pneumatic lift or pressurized tank;14, air-driven chute one;15, rotatory feeder valve one; 16, rotatory feeder valve two;17, tank car one;18, material bin;19, storehouse is returned to;20, chimney;21, water pump;22, cold water water jet; 23, emergency spray mouth;24, rotatory feeder valve three;25, filter;26, reducing agent storage tank;27, reductant nozzle;28, tank car Two;29, tank car three;30, air-driven chute two;31, air-driven chute three.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing, but protection scope of the present invention is not limited by schematic diagram.
As shown in Figure 1, baking flue gas defluorinate of the present invention, dedusting, depitching cigarette, desulphurization and denitration integrated processing system, it should Capital equipment and component are pipeline, filter, thermal accumulating incinerator, reactor (gas-solid mixer), deduster, air inducing in system Machine, spray-type humidifier, filter, device for transporting objects, pipeline, attached blower etc., main separate structure include: that roaster goes out Mouth flue 1, deduster flue 3, circulating fluid bed reactor 4, deduster 5, deduster rear pass 6, draws thermal accumulating incinerator 2 Blower 7, accident flue 1, accident flue 29, accident flue 3 10, centrifugal high pressure fan 11, roots blower 12, airlift Machine or pressurized tank 13, rotatory feeder valve 1, rotatory feeder valve 2 16, tank car 1, material bin 18, return air-driven chute 1 Go back to storehouse 19, chimney 20, water pump 21, cold water water jet 22, emergency spray mouth 23, rotatory feeder valve 3 24, filter 25, reducing agent Storage tank 26, reductant nozzle 27, tank car 2 28, tank car 3 29, air-driven chute 2 30, air-driven chute 3 31 etc., specific structure is such as Under:
Roaster exhaust pass 1 divides two-way: setting gradually filter 25, thermal accumulating incinerator 2, deduster flue on the way 3, circulating fluid bed reactor 4, deduster 5, deduster rear pass 6, air-introduced machine 7, chimney 20, the import of thermal accumulating incinerator 2 Valve 1# and valve 2# is respectively set in place and exit, valve 3# is arranged on deduster flue 3, circulating fluid bed reactor 4 removes Valve 4# is set on the pipeline that dirt device 5 communicates, valve 5#, air inducing are set on the pipeline that deduster 5, deduster rear pass 6 communicate Valve 6# and valve 7# is respectively set in the entrance of machine 7 and exit.Another way passes sequentially through accident flue 1, accident flue 3 10 are connected with the lower part in chimney 20, and valve 9#, accident is arranged with one 8 place of communicating of accident flue in roaster exhaust pass 1 Valve 11# is arranged with 20 place of communicating of chimney in flue 3 10, and by a pipeline (valve is arranged on the pipeline in accident flue 1 10#) it is connected with deduster flue 3, accident flue 1 also passes through accident flue 29 (valve 8# is arranged on accident flue 2 9) It is connected with deduster rear pass 6.
Arrange that filter 25, filter 25 are steel wire filter or nonmetallic mistake between thermal accumulating incinerator 2 and roaster Filter, effect are the particles and part tar filtered out in flue gas.The quantity of filter 25 is 1~10, can be mutually spare.
Thermal accumulating incinerator 2 sprays combustion gas among filter 25 and circulating fluid bed reactor 4 in thermal accumulating incinerator 2, Baking flue gas is completed in thermal accumulating incinerator 2 and burns task, and thermal accumulating incinerator 2 is distributed heat and can be used for recovery waste heat Heat baking flue gas or other processes.The quantity of thermal accumulating incinerator 2 is 1~10, and thermal accumulating incinerator 2 is equipped with automatic cleaning Device, can be using the dust and tar inside high-temperature flue gas cleaning equipment.Upper pyrometer area in thermal accumulating incinerator 2 is equipped with Reductant nozzle 27, bottom of the reductant nozzle 27 by pipeline (valve 12# is arranged on the pipeline) with reducing agent storage tank 26 It is connected, the top of reducing agent storage tank 26 is connected by pipeline with the tank car 2 28 for holding reducing agent, and reductant nozzle 27 connects Continuous injection reducing agent, is reduced to N for the nitrogen oxides in effluent for entering thermal accumulating incinerator 22
The material of circulating fluid bed reactor 4 is ordinary steel, abrasion-resistant stee or other alloys, as gas and solid particulate matter Mixing reactor.For water pump 21 by piping connection cold water water jet 22, cold water water jet 22 is set to circulating fluid bed reactor 4 It is interior, spray into atomization cooling water in circulating fluid bed reactor 4, atomization cooling water can be provided by high pressured water circuling pump or water pump with Compressed air converges offer.The quantity of circulating fluid bed reactor 4 is 1~10, the setting reflux of circulating fluid bed reactor 4 system System guarantees that the flue gas flow of 4 entrance of circulating fluid bed reactor is controllable.The top of material bin 18 passes through pipeline and one 17 phase of tank car Connection, the bottom of material bin 18 is connected by pipeline with one end of air-driven chute 2 30, the other end of air-driven chute 2 30 and Lower part in circulating fluid bed reactor 4 is connected.
In addition, water pump 21, by piping connection emergency spray mouth 23, emergency spray mouth 23 is located in accident flue 1, In whole system operational process, cold water is connected to emergency spray mouth 23 through water pump 21 and pipeline, and accident flue 1 sprays into interior cooling There is the case where flue kindling in water, emergency processing.
Deduster 5 plays the role of filtering dust between circulating fluid bed reactor 4 and air-introduced machine 7.Deduster 5 Can be pulsed jet cloth filter, backblowing cloth-bag dust collector or rotary blowing bag filter, the quantity of deduster 5 is 1~ 10.The bottom of deduster 5 passes through a pipeline (rotatory feeder valve 1 is arranged on the pipeline) and air-driven chute 3 31 One end is connected, and the other end of air-driven chute 3 31 is connected with the lower part in circulating fluid bed reactor 4.The bottom of deduster 5 Portion is connected by another pipeline with one end of air-driven chute 1, and the other end of air-driven chute 1 is mentioned by pipeline and strength Top in the machine of liter or pressurized tank 13 is connected.Top in Pneumatic lift or pressurized tank 13 also passes through pipeline and returns to storehouse 19 Top be connected, the bottom for returning to storehouse 19 passes through pipeline (on the pipeline be arranged rotatory feeder valve 3 24) and 3 29 phase of tank car It is connected to, the bottom in Pneumatic lift or pressurized tank 13 is connected by pipeline with roots blower 12.
For air-introduced machine 7 between deduster 5 and chimney 20, it can be frequency conversion fan, work that the quantity of air-introduced machine 7, which is 1~4, Frequency blower, high pressure blower or low pressure blower.Centrifugal high pressure fan 11 passes through piping connection respectively: material bin 18, air-driven chute two 30, air-driven chute 3 31, air-driven chute 1, return storehouse 19, effect is: centrifugal high pressure fan provides material horizontal feed institute Need gas source.
A plurality of alternate channel is set inside a whole set of purification system, when individual plants break down or repair, System overall operation is not influenced.Adsorbent in system is alkali grain, and alkali grain is Ca (OH)2、CaCO3、MgCO3、Mg (OH)2With the mixture of one or more of NaOH, alkali grain partial size is 1 μm~2cm.Adsorbent can also in system For the mixture based on the oxides such as CaO, MgO, or the form of mixtures of addition metallic catalyst.Selectivity is non-in system urges Changing the reduction selected reactant of denitration (reducing agent) is ammonia NH3, urea (CO (NH2)2), hydrogen propylhomoserin ((HCNO)3) or other change Property amino reductive, 2 high-temperature region of thermal accumulating incinerator spray into reducing agent, nitrogen oxides is reduced to nitrogen.System is equipped with Material bin 18 and chimney 20, the quantity of material bin 18 are 1~4, and the quantity of chimney 20 is 1~4.
In addition, temperature and pressure detection device in many places is arranged in system as needed, operating condition is monitored in real time, at any time Adjust operating parameter.Setting kindling detection and flood, steam annihilator in system.System is equipped with material and conveys and measure system System, convenient for the conveying of alkali grain material and reducing agent.
As shown in Figure 1, the present invention is that processing technique is controlled in a kind of baking furnace fume integration, using thermal accumulating incinerator+de- Nitre+alkalinity Dry Adsorption thoroughly handles baking flue gas pollutant, and concrete processing procedure is as follows:
Baking flue gas passes through roaster exhaust pass 1 first, and the filter 25 being arranged in piping filters out part powder Dirt and tar enter back into thermal accumulating incinerator 2, dispose tar and BaP in flue gas using the combustion gas that incinerator is added, Reductant nozzle 27 in 2 high-temperature region of thermal accumulating incinerator sprays into NOx reducing agent, completes nitrogen oxides treatment.Heat accumulating type Flue gas in incinerator 2 enters circulating fluid bed reactor 4 by deduster flue 3, is added in circulating fluid bed reactor 4 Adsorbent, cold water is added to circulating fluid bed reactor 4 through water pump 21 and cold water water jet 22 and carries out decreasing temperature and increasing humidity, in recycle stream In fluidized bed reactor 4 and alkaline particle is under the atomized water effect of penetrating, completes adsorption reaction.Flue gas after adsorption reaction with Alkaline particle enters deduster 5, completes filtering and reaches gas solid separation purpose, treated flue gas qualified discharge, and flue gas is through removing Dirt device rear pass 6 and air-introduced machine 7 are discharged into atmosphere by chimney 20, the innoxious landfill disposal of the dust filtered out.
Adsorbent is added to air-driven chute 2 30 to material bin 18, then by rotatory feeder valve 2 16 by one 17 dnockout of tank car, It is added to circulating fluid bed reactor 4, enters dedusting together after completing adsorption reaction with flue gas in circulating fluid bed reactor 4 Device 5.Gas solid separation is completed in deduster 5, the adsorbent filtered out enters Pneumatic lift or pressure by air-driven chute 1 Tank 13, roots blower 12 provide power, and the adsorbent after reaction is promoted to storehouse 19 is returned to, by expecting under rotatory feeder valve 3 24 Subsequent processing is carried out in tank car 3 29.
The adsorbent separated from deduster 5, partially by rotatory feeder valve 1 into air-driven chute 3 31, then by Air-driven chute 3 31 is transported in circulating fluid bed reactor 4.
The reducing agent sprayed in thermal accumulating incinerator 2 is transported to reducing agent storage tank 26 by tank car 3 29, sprays into through nozzle 27 The high-temperature region of thermal accumulating incinerator 2, completion restore nitrogen oxides in furnace.
When system handles normal operating conditions, valve 8#, 9#, 10#, 11# are in close state.Other valves are in and beat Open state, flue gas pass through roaster exhaust pass 1, filter 25, thermal accumulating incinerator 2, deduster flue 3, recirculating fluidized bed Reactor 4, deduster 5, deduster rear pass 6, air-introduced machine 7 are discharged into atmosphere by chimney 20.
When thermal accumulating incinerator 2 needs to overhaul in system, valve 1#, 2#, 8#, 11# are in close state, on pipeline its Its valve is in the open state, and flue gas passes through roaster exhaust pass 1, deduster flue 3, circulating fluid bed reactor 4, dedusting Device 5, deduster rear pass 6, air-introduced machine 7 are discharged into atmosphere by chimney 20.
When reducing agent transportation system breaks down in system, valve 1#, 2#, 8#, 11#, 12# are closed, in opening conduits Other valves, flue gas pass through roaster exhaust pass 1, deduster flue 3, circulating fluid bed reactor 4, deduster 5, deduster Rear pass 6, air-introduced machine 7 are discharged into atmosphere by chimney 20.
When duster system in system or material conveying are broken down, valve 3#, 5#, 9#, 11# are in close state, Other valves are in the open state on pipeline, and flue gas passes through roaster exhaust pass 1, filter 25, thermal accumulating incinerator 2, removes Dirt device flue 3, accident flue 1, accident flue 29, air-introduced machine 7 are discharged into atmosphere by chimney 20.
When flue kindling or incinerator 2, deduster 5 when something goes wrong, valve 9#, 11# are in the open state, Its valve is in close state, and flue gas is by roaster exhaust pass 1, accident flue 1, accident flue 3 10, by 20 row of chimney Enter atmosphere.

Claims (10)

1. a kind of baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integral treatment method, which is characterized in that use Thermal accumulating incinerator+denitration+alkalinity Dry Adsorption thoroughly handles baking flue gas pollutant, and concrete processing procedure is as follows:
Baking flue gas passes through roaster exhaust pass first, and the filter being arranged in piping filters out part dust and coke Oil enters back into thermal accumulating incinerator, tar and BaP in flue gas is disposed using the combustion gas that incinerator is added, in heat accumulating type The reductant nozzle of incinerator high-temperature region sprays into NOx reducing agent, completes nitrogen oxides treatment;In thermal accumulating incinerator Flue gas enters circulating fluid bed reactor by deduster flue, and adsorbent, cold water warp are added in circulating fluid bed reactor Water pump and cold water water jet be added to circulating fluid bed reactor carry out decreasing temperature and increasing humidity, in circulating fluid bed reactor with alkalinity Particulate matter completes adsorption reaction under the atomized water effect of penetrating;Flue gas and alkaline particle after adsorption reaction enter dedusting Device completes filtering and reaches gas solid separation purpose, treated flue gas qualified discharge, flue gas through deduster rear pass and air-introduced machine, Atmosphere is discharged by chimney, the innoxious landfill disposal of the dust filtered out.
2. baking flue gas defluorinate described in accordance with the claim 1, dedusting, depitching cigarette, desulphurization and denitration integral treatment method, It is characterized in that, adsorbent is by tank car, a dozen expect material bin, then are added to air-driven chute two by rotatory feeder valve two, are added to Circulating fluid bed reactor enters deduster after completing adsorption reaction with flue gas in circulating fluid bed reactor together;It is removing Gas solid separation is completed in dirt device, the adsorbent filtered out enters Pneumatic lift or pressurized tank, roots blower by air-driven chute one There is provided power, by after reaction adsorbent promoted to return storehouse, by expected in tank car three under rotatory feeder valve three carry out it is subsequent Reason.
3. baking flue gas defluorinate described in accordance with the claim 1, dedusting, depitching cigarette, desulphurization and denitration integral treatment method, It is characterized in that, the reducing agent sprayed in thermal accumulating incinerator is transported to reducing agent storage tank by tank car three, accumulation of heat is sprayed into through nozzle The high-temperature region of formula incinerator, completion restore nitrogen oxides in furnace;The adsorbent separated from deduster, partially by rotation Feed valve one enters air-driven chute three, then is transported in circulating fluid bed reactor by air-driven chute three.
4. a kind of dedicated baking flue gas defluorinate of one of claims 1 to 3 the method, dedusting, depitching cigarette, desulphurization and denitration Integrated processing system, which is characterized in that specific structure is as follows:
Roaster exhaust pass divides two-way: setting gradually filter, thermal accumulating incinerator, deduster flue, recycle stream on the way Fluidized bed reactor, deduster, deduster rear pass, air-introduced machine, chimney, another way pass sequentially through accident flue one, accident flue Three are connected with the lower part in chimney, and accident flue one is connected by a pipeline with deduster flue, and accident flue one is also It is connected by accident flue two with deduster rear pass.
5. baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system according to claim 4, It is characterized in that, thermal accumulating incinerator, among filter and circulating fluid bed reactor, the top in thermal accumulating incinerator is high Warm area is equipped with reductant nozzle, and reductant nozzle is connected by pipeline with the bottom of reducing agent storage tank, the top of reducing agent storage tank Portion is connected by pipeline with the tank car two for holding reducing agent, and reductant nozzle continuously sprays reducing agent, will burn into heat accumulating type The nitrogen oxides in effluent for burning furnace is reduced to N2
6. baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system according to claim 4, It is characterized in that, water pump, by piping connection cold water water jet, cold water water jet is set in circulating fluid bed reactor, recycle Atomization cooling water is sprayed into fluidized-bed reactor;The top of material bin is connected by pipeline with tank car one, the bottom of material bin It is connected by pipeline with one end of air-driven chute two, the lower part in the other end and circulating fluid bed reactor of air-driven chute two It is connected.
7. baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system according to claim 4, It is characterized in that, water pump, by piping connection emergency spray mouth, emergency spray mouth is located in accident flue one, cold water through water pump with Pipeline is connected to emergency spray mouth, and accident flue one sprays into interior cooling water, and the case where flue kindling occurs in emergency processing.
8. baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system according to claim 4, It is characterized in that, deduster is between circulating fluid bed reactor and air-introduced machine, the bottom of deduster by a pipeline with One end of air-driven chute three is connected, and the other end of air-driven chute three is connected with the lower part in circulating fluid bed reactor;It removes The bottom of dirt device is connected by another pipeline with one end of air-driven chute one, and the other end of air-driven chute one passes through pipeline and gas Top in power elevator or pressurized tank is connected;Top in Pneumatic lift or pressurized tank also passes through pipeline and returns to storehouse Top is connected, and the bottom for returning to storehouse is connected by pipeline with tank car three, and the bottom in Pneumatic lift or pressurized tank passes through Pipeline is connected with roots blower.
9. baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system according to claim 4, It is characterized in that, the adsorbent in system is alkali grain, alkali grain is Ca (OH)2、CaCO3、MgCO3、Mg(OH)2With The mixture of one or more of NaOH, alkali grain partial size are 1 μm~2cm;Alternatively, in system adsorbent be with Mixture based on CaO, MgO oxide, or the form of mixtures of addition metallic catalyst.
10. baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integrated processing system according to claim 4, It is characterized in that, the reducing agent in system is ammonia NH3, urea (CO (NH2)2), hydrogen propylhomoserin ((HCNO)3) or other be modified ammonia Base reductant.
CN201910569325.4A 2019-06-27 2019-06-27 Baking flue gas defluorinate, dedusting, depitching cigarette, desulphurization and denitration integral treatment method and system Pending CN110252036A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111282416A (en) * 2020-01-23 2020-06-16 国家电投集团远达环保工程有限公司重庆科技分公司 Electrolytic aluminum carbon anode roasting flue gas purification equipment and method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107537229A (en) * 2016-06-23 2018-01-05 沈阳铝镁设计研究院有限公司 Handle the device and method of baking furnace fume
CN109323274A (en) * 2018-11-16 2019-02-12 淮南普瑞发环境科技有限公司 It is a kind of can denitration heat accumulating type incineration device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107537229A (en) * 2016-06-23 2018-01-05 沈阳铝镁设计研究院有限公司 Handle the device and method of baking furnace fume
CN109323274A (en) * 2018-11-16 2019-02-12 淮南普瑞发环境科技有限公司 It is a kind of can denitration heat accumulating type incineration device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111282416A (en) * 2020-01-23 2020-06-16 国家电投集团远达环保工程有限公司重庆科技分公司 Electrolytic aluminum carbon anode roasting flue gas purification equipment and method

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