CN108325356A - It is a kind of suitable for the cooperation-removal fine particle of sulphur coal and the devices and methods therefor of sulfur trioxide - Google Patents

It is a kind of suitable for the cooperation-removal fine particle of sulphur coal and the devices and methods therefor of sulfur trioxide Download PDF

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Publication number
CN108325356A
CN108325356A CN201810213964.2A CN201810213964A CN108325356A CN 108325356 A CN108325356 A CN 108325356A CN 201810213964 A CN201810213964 A CN 201810213964A CN 108325356 A CN108325356 A CN 108325356A
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China
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tapered
pipeline
flaring
cooperation
agglomerator
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CN201810213964.2A
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Chinese (zh)
Inventor
杨林军
孙宗康
周磊
申奥
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东南大学
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Priority to CN201810213964.2A priority Critical patent/CN108325356A/en
Publication of CN108325356A publication Critical patent/CN108325356A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
    • B01D51/02—Amassing the particles, e.g. by flocculation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/79—Injecting reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

Abstract

The invention discloses a kind of suitable for the cooperation-removal fine particle of sulphur coal and the devices and methods therefor of sulfur trioxide, the device include chemical agglomeration system, tapered flaring pipe section, cycle air pump and electrostatic precipitator.The high-temperature flue gas that first high sulfur coal combustion is generated introduces tapered flaring pipe section, sprays agglomerator by chemical agglomeration system so that agglomerator and PM in high-temperature flue gas2.5Adsorption-flocculation promotes PM2.5Reunion is grown up, and reduces flue-gas temperature；And tapered flaring pipeline throat site generates jet effect and causes flue-gas temperature to be reduced to acid dew point hereinafter, promoting SO3It is condensed in flying dust；It recycles air pump and generates jet stream in tapered flaring pipeline throat location, form Turbulent Flow Field, promote PM in flue gas2.5Collision is reunited and SO3Condensation on flying dust substantially increases PM by the synergistic effect of above-mentioned apparatus2.5With SO3Removal efficiency, enhancing electric precipitation cooperation-removal PM2.5With SO3.Present invention process is simple, can be widely applied to be equipped in the coal-fired power station boiler and industrial boiler system of electrostatic precipitator.

Description

It is a kind of suitable for the cooperation-removal fine particle of sulphur coal and the device of sulfur trioxide and Its method
Technical field
The present invention relates to a kind of suitable for the cooperation-removal fine particle of sulphur coal and the devices and methods therefor of sulfur trioxide, Belong to atmosphere pollution Treatment process field.
Background technology
The aerodynamic diameter generated during power plant soot is less than the fine particle (PM of 2.5um2.5) have become China Atmospheric environment problem outstanding is to lead to the great environmental problems such as atmospheric visibility reduction, haze weather and Global climate change An important factor for.Cleaner used in the coal-burning power plant in China nearly 90% ~ 95% is dry electrostatic cleaner at present, although its To coarse grained collection efficiency in coal-fired flue-gas up to 99.9% or even higher, but due to the dust removal machine of dry electrostatic cleaner The presence of " penetrating window " caused by reason, to the PM based on sub-micron2.5Arresting efficiency it is but not high.To meet increasingly Stringent fired power generating unit pollutant emission standard, it is necessary to develop new technology to reduce PM2.5Discharge.
In addition, in coal-burning power plant, boiler combustion and flue gas can all generate a certain amount of after SCR system is catalyzed SO3, 3% sulphur coal is more than particularly with sulfur content, because its fine particle shape pyrite and organic sulfur can not pass through physical method Removing, makes SO in the flue gas after burning3Content is higher.Due to SO3It easily is combined to form sulfuric acid mist with water, there is very strong toxicity, Flue gas acid dew point can be made to increase simultaneously, corrode upstream device, and generate " Lan Yu " phenomenon, have to ecological environment and human health Larger harm, therefore the SO in flue gas is generated to high sulfur coal combustion3It is controlled extremely urgent.
In summary, it is necessary to being capable of PM in cooperation-removal high sulfur coal combustion flue gas2.5With SO3Technology developed. Currently, cooperation-removal PM industrially can be achieved2.5With SO3Technology be mainly include low temperature electric precipitation and wet-esp skill Art.But low temperature electric precipitation can be such that flue length increases, arrangement is complicated, improves flue resistance and power consumption, and causes flue rotten Erosion, makes capital expenditure, failure, maintenance cost greatly increase, and is not particularly suited for the minimum discharge transformation of existing power plant；And wet type is electric Although dedusting technology is to PM2.5Removal efficiency is higher, but to SO3Removal efficiency it is not high, only 50% ~ 65% or so, make simultaneously High price is expensive, and domestic application is simultaneously few.Therefore, it is necessary to which it is relatively low and can be easily installed in the association of existing power plant to develop a kind of cost With PM in removing high sulfur coal combustion flue gas2.5With SO3Technology.
Invention content
Technical problem：The present invention is complicated for Processes and apparatus of the existing technology arrangement, cannot effective cooperation-removal PM2.5With SO3Deficiency, a kind of device and its side of the cooperation-removal fine particle suitable for sulphur coal and sulfur trioxide are provided Method can be easily installed in existing power plant, effectively facilitate PM2.5Grow up, reduce flue gas in PM2.5With SO3Discharge, realize PM2.5With SO3Cooperation-removal.
Technical solution：It is a kind of suitable for the cooperation-removal fine particle of sulphur coal and the device of sulfur trioxide, the device packet Chemical agglomeration system, tapered flaring pipe section, cycle air pump and electrostatic precipitator are included, the chemical agglomeration system is by agglomerator Storage tank, metering pump, air compressor machine, double fluid atomization nozzle composition, wherein agglomerator storage tank and metering pump, double fluid atomization nozzle according to Secondary to connect and compose fluid path, air compressor machine connects and composes gas circuit with double fluid atomization nozzle；The tapered flaring pipe section is by tapered Pipeline is constituted after preceding pipeline, tapered segment pipe, flaring segment pipe and flaring, and tapered segment pipe is larynx with divergent segment pipeline junction Mouth position, and the throat location is equipped with trepanning；The circulating air pump steam inlet is located at after flaring on pipeline, and circulating air pumps out gas Mouth is connect with the trepanning in throat location, and double fluid atomization nozzle is set in tapered preceding pipeline, is managed after electrostatic precipitator and flaring Road end connects.
Further, it is reverse flue gas direction of flow that the double fluid atomization nozzle, which sprays into agglomerator direction,.
Further, distance and throat location diameter ratio are between the double fluid atomization nozzle and converging transition entrance 1~2∶1。
Further, the tapered flaring pipe section, tapered preceding pipeline diameter and pipeline after throat location diameter, flaring are straight The ratio between diameter is 2.5: 1: 2, and tapered preceding pipeline length is 4 ~ 6: 1 with throat location diameter ratio, converging transition duct length and aditus laryngis Position diameter ratio is 3 ~ 5: 1, and divergent segment duct length is 1.5 ~ 3: 1 with throat location diameter ratio, duct length after flaring It is 6 ~ 8: 1 with throat location diameter ratio.
Further, distance is with throat location diameter ratio between the circulating air pump steam inlet and electrostatic precipitator entrance 8~10∶1。
A method of the cooperation-removal fine particle and sulfur trioxide suitable for sulphur coal based on above-mentioned apparatus, the party Method includes the following steps：
（1）The high-temperature flue gas that high sulfur coal combustion is generated introduces tapered flaring pipe section, first passes around tapered preceding pipeline, opens Metering pump in chemical agglomeration system and air compressor machine, to control high-temperature flue gas of the double fluid atomization nozzle into tapered preceding pipeline Agglomerator is sprayed, agglomerator droplet evaporates in tapered preceding pipeline, PM in the macromolecular chain and high-temperature flue gas in agglomerator2.5Hair Raw adsorption-flocculation, promotes PM2.5Reunion is grown up, while high-temperature flue-gas being made to reduce；
（2）When flue gas after cooling passes through the throat location between tapered segment pipe and flaring segment pipe, tapered diffuser is utilized Road part streams effect reduces temperature, and flue-gas temperature is made to be further reduced to acid dew point hereinafter, promoting SO in throat location3Condensation In on flying dust；The partial fume after flaring in pipeline is taken to be injected into tapered flaring pipeline aditus laryngis position by circulating air pumping simultaneously It sets, makes to form Turbulent Flow Field in flue, promote PM2.5Mutually collision is reunited between particulate matter, while extending gas residence time, Promote SO3Condensation on flying dust；
（3）Final curing is in the SO on flying dust3The PM to grow up with reunion2.5It is removed by electrostatic precipitator.
Further, the agglomerator is the mixed aqueous solution of wetting agent and high molecular polymer, wherein wetting agent quality Percentage composition is 0.01% ~ 0.03%, and high molecular polymer mass percentage is 0.05% ~ 0.10%；Agglomerator solution temperature is 25 ~ 50 DEG C, the additive amount into flue gas is 0.5 ~ 2.5g/m3。
Further, it is the 10% ~ 20% of the total tolerance of flue gas that the circulating air pumping, which takes tolerance, and circulating air pump discharge gas velocity is 20 ~30m/s。
Advantageous effect：
（1）The present invention is using macromolecular chain in chemical agglomeration agent to PM in flue gas2.5Adsorption-flocculation effect, and cycle air pump Jet action is generated in tapered flaring pipeline throat location and causes Turbulent Flow Field, promotes PM in flue gas2.5Collision is reunited, and grain size increases Greatly, " penetrating window " particle size range for avoiding electrostatic precipitator, substantially increases electrostatic precipitator to PM2.5Removal efficiency.
（2）The present invention makes flue-gas temperature reduce and tapered flaring pipeline aditus laryngis portion using the evaporation of moisture in agglomerator The flue-gas temperature that position generates caused by jet effect further decreases, and promotes SO3SO is formed with water molecules3Acid mist is condensed in On flying dust and with flying dust neutral and alkali substance reaction, make SO3Cure in being removed by follow-up electrostatic precipitator on flying dust.
（3）The present invention takes the partial fume before electrostatic precipitator to be injected into tapered flaring pipeline larynx using circulating air pumping Mouth position generates jet stream, makes to form Turbulent Flow Field in flue, on the one hand promotes PM in flue gas2.5It mutually collides, roll into a ball between particulate matter It is poly- to grow up, on the other hand extend gas residence time, promotes SO3Condensation on flying dust with react, ensure chemical agglomeration agent spray Mist evaporating completely before entering electrostatic precipitator utilizes, and improves PM2.5With SO3Removal efficiency, while not increasing in former flue Exhaust gas volumn does not interfere with boiler thermal efficiency.
（4）Present invention process is simple, and need to be only transformed in the flue before electrostatic precipitator can cooperation-removal high-sulfur PM in coal combustion flue gas2.5And SO3, convenient to be installed in existing power plant, investment and operating cost are relatively low, can be widely applied to It is equipped in the coal-fired power station boiler and industrial boiler system of electrostatic precipitator.
Description of the drawings
Fig. 1 is the device of the invention structural schematic diagram.
In figure: 1- agglomerator storage tanks；2- metering pumps；3- air compressor machines；4- recycles air pump；5- double fluid atomization nozzles；6- is gradually Contracting preceding pipeline；The tapered segment pipes of 7-；8- flaring segment pipes；Pipeline after 9- flarings；10- electrostatic precipitator.
Specific implementation mode
It elaborates, but does not want in this, as to the application right to the present invention with reference to embodiment and its attached drawing Ask the restriction of protection domain.
Embodiment 1
It is a kind of suitable for the cooperation-removal fine particle of sulphur coal and the device of sulfur trioxide, the device include chemical agglomeration system System, tapered flaring pipe section, cycle air pump 4 and electrostatic precipitator 10, the chemical agglomeration system is by agglomerator storage tank 1, meter Amount pump 2, air compressor machine 3, double fluid atomization nozzle 5 form, wherein agglomerator storage tank 1 and metering pump 2, double fluid atomization nozzle 5 according to Secondary to connect and compose fluid path, air compressor machine 3 connects and composes gas circuit with double fluid atomization nozzle 5；The tapered flaring pipe section is by gradually Contracting preceding pipeline 6, tapered segment pipe 7, flaring segment pipe 8 and pipeline 9 after flaring are constituted, and tapered segment pipe 7 connects with flaring segment pipe 8 It is throat location to meet place, and the throat location is equipped with trepanning；The circulating air pump steam inlet is located at after flaring on pipeline 9, follows Distance and throat location diameter ratio are 8 ~ 10: 1 between 4 air inlet of ring air pump and electrostatic precipitator entrance.Circulating air pumps out gas Mouth is connect with the trepanning in throat location, and double fluid atomization nozzle 5 is set in tapered preceding pipeline 6, and double fluid atomization nozzle 5 sprays into Agglomerator direction is reverse flue gas direction of flow.Electrostatic precipitator 10 is connect with 9 end of pipeline after flaring.
Wherein, distance and throat location diameter ratio are 1 ~ 2 between 7 entrance of double fluid atomization nozzle 5 and tapered segment pipe: 1.Tapered flaring pipe section, 6 diameter of tapered preceding pipeline are 2.5: 1 with 9 diameter ratio of pipeline after throat location diameter, flaring: 2,6 length of tapered preceding pipeline is 4 ~ 6: 1 with throat location diameter ratio, 7 length of tapered segment pipe and throat location diameter ratio It is 3 ~ 5: 1,8 length of flaring segment pipe is 1.5 ~ 3: 1 with throat location diameter ratio, 9 length of pipeline and throat location after flaring Diameter ratio is 6 ~ 8: 1.
A method of the cooperation-removal fine particle and sulfur trioxide suitable for sulphur coal based on above-mentioned apparatus, high-sulfur The high-temperature flue gas that coal combustion generates enters tapered flaring pipe section in flue, first passes around chemical agglomeration system, control is gradually Double fluid atomization nozzle in contracting preceding pipeline sprays into chemical agglomeration agent into flue, and agglomerator droplet evaporates in flue, reunites PM in macromolecular chain and flue gas in agent2.5Adsorption-flocculation occurs, promotes PM2.5Reunion is grown up, while flue-gas temperature being made to reduce；Afterwards When the continuous throat location passed through between tapered segment pipe and flaring segment pipe, tapered flaring pipeline generates jet effect, makes flue gas Temperature is further reduced to acid dew point hereinafter, promoting SO in throat location3It is condensed on flying dust and is removed by electrostatic precipitator；It follows Partial fume after ring air pump extraction flaring in pipeline is injected into tapered flaring pipeline throat location, makes to form turbulent flow in flue Flow field promotes PM2.5Mutually collision is reunited between particulate matter, while extending gas residence time, promotes SO3It is solidifying on flying dust Knot, final curing is in the SO on flying dust3The PM to grow up with reunion2.5It is removed by electrostatic precipitator.
Wherein, agglomerator is the mixed aqueous solution of wetting agent and high molecular polymer, wherein wetting agent mass percentage It is 0.01% ~ 0.03%, high molecular polymer mass percentage is 0.05% ~ 0.10%；Agglomerator solution temperature is 25 ~ 50 DEG C, Additive amount into flue gas is 0.5 ~ 2.5g/m3。
It is the 10% ~ 20% of the total tolerance of flue gas to recycle air pump 4 and extract tolerance, and it is 20 ~ 30m/s that cycle air pump 4, which exports gas velocity,.
Embodiment 2
Ash-laden gas is generated by coal-burning boiler, exhaust gas volumn 300Nm3/ h, flue gas flow rate is 12m/s in flue.Boiler operatiopn is steady After fixed, a certain amount of flying dust and SO are added in flue gas3, the flue gas that simulation high sulfur coal combustion generates, the required PM of guarantee test2.5And SO3Concentration.Before not utilizing apparatus of the present invention and method, flue gas is directly entered electrostatic precipitator, claims low pressure impact using electricity Device ELPI on-line testings PM2.5Concentration and particle diameter distribution, after tested, electrostatic precipitator entrance PM2.5Particle diameter distribution is in typical Bimodal distribution, for first peak value present in about 0.1um, number concentration is 6.7 ' 106/cm3, another peak value appears in about 1um Place, number concentration are 2.1 ' 106/cm3, PM2.5Mass concentration is 220mg/m3, number concentration is 1.3 ' 107/cm3；Electrostatic precipitation Device exit PM2.5Mass concentration is 28mg/m3, number concentration is 5.9 ' 106/cm3；Using high temperature condensation method to electrostatic precipitator SO afterwards3Concentration is tested, mass concentration 80mg/m3。
Part flue before electric precipitator is transformed according to of the present invention later, flue gas is made to enter tapered flaring pipeline Part passes through chemical agglomeration system and recycles the Turbulent Flow Field that air pump jet stream generates, eventually enters into electrostatic precipitator successively.Its In, the reverse flue gas direction of flow of double fluid atomization nozzle sprays into agglomerator, and wetting agent is lauryl sodium sulfate, matter in agglomerator It is 0.01% to measure percentage composition, and high molecular polymer is xanthans, and mass percentage 0.05%, agglomerator solution temperature is 25 DEG C, the additive amount into flue gas is 1.5g/m3；It is 40Nm that circulating air pumping, which takes tolerance,3/ h, circulating air pump discharge gas velocity are 25m/ S, circulating air pump inlet and flue link position are located at before electrostatic precipitator at 0.8m；The a diameter of 0.1m of throat location, two-fluid Distance and throat location diameter ratio are 2: 1 between atomizer and converging transition entrance, tapered preceding pipeline diameter and aditus laryngis The ratio between pipe diameter is 2.5: 1: 2 after position diameter, flaring, and tapered preceding pipeline length is 6: 1 with throat location diameter ratio, gradually Contracting segment pipe length is 5: 1 with throat location diameter ratio, and divergent segment duct length is 3: 1 with throat location diameter ratio, gradually Duct length and throat location diameter ratio are 8: 1 after expansion.Equally use Electrical low pressure impactor ELPI on-line testings PM2.5It is dense Degree and particle diameter distribution, after tested, electrostatic precipitator entrance PM2.5Grain size peak value is present in about 2.3um, number concentration 7.2 ´106/cm3；Electrostatic precipitator exit PM2.5Mass concentration is 9mg/m3, number concentration is 1.6 ' 106/cm3；It is cold using high temperature Solidifying method is to SO after electrostatic precipitator3Concentration is tested, mass concentration 8mg/m3.Before the method for the present invention and device being utilized Test result afterwards is compared it is found that the present invention can make electrostatic precipitator export PM2.5Mass concentration reduces about 67.9%, quantity Concentration reduces about 72.9%, and particle size peak value significantly increases, PM2.5It grows up apparent, meanwhile, cigarette after electrostatic precipitator can be made SO in gas3Concentration significantly reduces, to SO3Removal efficiency has reached 90%, illustrates that the present invention can effective cooperation-removal high sulfur coal combustion PM in flue gas2.5With SO3。

Claims (8)

1. a kind of suitable for the cooperation-removal fine particle of sulphur coal and the device of sulfur trioxide, which is characterized in that the device packet Include chemical agglomeration system, tapered flaring pipe section, cycle air pump（4）And electrostatic precipitator（10）, the chemical agglomeration system By agglomerator storage tank（1）, metering pump（2）, air compressor machine（3）, double fluid atomization nozzle（5）Composition, wherein agglomerator storage tank（1）With Metering pump（2）, double fluid atomization nozzle（5）It is sequentially connected composition fluid path, air compressor machine（3）With double fluid atomization nozzle（5）Connection Constitute gas circuit；The tapered flaring pipe section is by tapered preceding pipeline（6）, tapered segment pipe（7）, flaring segment pipe（8）With gradually Pipeline after expansion（9）It constitutes, tapered segment pipe（7）With flaring segment pipe（8）Junction is throat location, and is set in the throat location There is trepanning；The circulating air pump steam inlet is located at pipeline after flaring（9）On, circulating air pumps out gas port and the trepanning in throat location Connection, double fluid atomization nozzle（5）Set on tapered preceding pipeline（6）It is interior, electrostatic precipitator（10）With pipeline after flaring（9）End connects It connects.
2. it is according to claim 1 a kind of suitable for the cooperation-removal fine particle of sulphur coal and the device of sulfur trioxide, It is characterized in that, the double fluid atomization nozzle（5）It is reverse flue gas direction of flow to spray into agglomerator direction.
3. it is according to claim 1 a kind of suitable for the cooperation-removal fine particle of sulphur coal and the device of sulfur trioxide, It is characterized in that, the double fluid atomization nozzle（5）With tapered segment pipe（7）Distance and throat location diameter ratio between entrance It is 1 ~ 2: 1.
4. it is according to claim 1 a kind of suitable for the cooperation-removal fine particle of sulphur coal and the device of sulfur trioxide, It is characterized in that, the tapered flaring pipe section, tapered preceding pipeline（6）Diameter and pipeline after throat location diameter, flaring（9） Diameter ratio is 2.5: 1: 2, tapered preceding pipeline（6）Length is 4 ~ 6: 1 with throat location diameter ratio, tapered segment pipe（7）It is long Degree is 3 ~ 5: 1 with throat location diameter ratio, flaring segment pipe（8）Length is 1.5 ~ 3: 1 with throat location diameter ratio, flaring Pipeline afterwards（9）Length is 6 ~ 8: 1 with throat location diameter ratio.
5. it is according to claim 1 a kind of suitable for the cooperation-removal fine particle of sulphur coal and the device of sulfur trioxide, It is characterized in that, the cycle air pump（4）Distance and throat location diameter ratio are 8 between air inlet and electrostatic precipitator entrance ~10∶1。
6. according to the cooperation-removal fine particle and sulfur trioxide suitable for sulphur coal of any one of claim 1-5 described devices Method, which is characterized in that this approach includes the following steps：
（1）The high-temperature flue gas that high sulfur coal combustion is generated introduces tapered flaring pipe section, first passes around tapered preceding pipeline（6）, Open the metering pump in chemical agglomeration system（2）And air compressor machine（3）, to control double fluid atomization nozzle to tapered preceding pipeline （6）Interior high-temperature flue gas sprays agglomerator, and agglomerator droplet is in tapered preceding pipeline（6）Middle evaporation, the macromolecular chain in agglomerator With PM in high-temperature flue gas2.5Adsorption-flocculation occurs, promotes PM2.5Reunion is grown up, while high-temperature flue-gas being made to reduce；
（2）When flue gas after cooling passes through the throat location between tapered segment pipe and flaring segment pipe, tapered diffuser is utilized Road, which generates jet effect, reduces temperature, and flue-gas temperature is made to be further reduced to acid dew point hereinafter, promoting SO in throat location3Condensation In on flying dust；The partial fume after flaring in pipeline is taken to be injected into tapered flaring pipeline aditus laryngis position by circulating air pumping simultaneously It sets, makes to form Turbulent Flow Field in flue, promote PM2.5Mutually collision is reunited between particulate matter, while extending gas residence time, Promote SO3Condensation on flying dust；
（3）Final curing is in the SO on flying dust3The PM to grow up with reunion2.5It is removed by electrostatic precipitator.
7. the method for the cooperation-removal fine particle and sulfur trioxide according to claim 6 suitable for sulphur coal, special Sign is that the agglomerator is the mixed aqueous solution of wetting agent and high molecular polymer, wherein wetting agent mass percentage It is 0.01% ~ 0.03%, high molecular polymer mass percentage is 0.05% ~ 0.10%；Agglomerator solution temperature is 25 ~ 50 DEG C, Additive amount into flue gas is 0.5 ~ 2.5g/m3。
8. the method for the cooperation-removal fine particle and sulfur trioxide according to claim 6 suitable for sulphur coal, special Sign is, the cycle air pump（4）10% ~ 20% that tolerance is the total tolerance of flue gas is extracted, air pump is recycled（4）Export gas velocity be 20 ~ 30m/s。
CN201810213964.2A 2018-03-15 2018-03-15 It is a kind of suitable for the cooperation-removal fine particle of sulphur coal and the devices and methods therefor of sulfur trioxide CN108325356A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109364678A (en) * 2018-12-26 2019-02-22 宁波大红鹰学院 A kind of device for promoting superfine particulate matter in coal-fired flue-gas to reunite

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101306310A (en) * 2008-01-18 2008-11-19 曾庆衿 Waste gas decomposition device and method using jet and infrared resonance
CN105126561A (en) * 2015-08-04 2015-12-09 东南大学 Coal-fired flue gas PM2.5/SO3/Hg combined removing method based on desulfurization wastewater evaporation treatment
CN105749690A (en) * 2016-04-28 2016-07-13 河北工业大学 Device and method for promoting interaction of fine particles in smoke of coal-fired boiler

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101306310A (en) * 2008-01-18 2008-11-19 曾庆衿 Waste gas decomposition device and method using jet and infrared resonance
CN105126561A (en) * 2015-08-04 2015-12-09 东南大学 Coal-fired flue gas PM2.5/SO3/Hg combined removing method based on desulfurization wastewater evaporation treatment
CN105749690A (en) * 2016-04-28 2016-07-13 河北工业大学 Device and method for promoting interaction of fine particles in smoke of coal-fired boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109364678A (en) * 2018-12-26 2019-02-22 宁波大红鹰学院 A kind of device for promoting superfine particulate matter in coal-fired flue-gas to reunite

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