CN105854501A - Emission reduction system for fine particles in sintering process of iron ore - Google Patents
Emission reduction system for fine particles in sintering process of iron ore Download PDFInfo
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- CN105854501A CN105854501A CN201610288709.5A CN201610288709A CN105854501A CN 105854501 A CN105854501 A CN 105854501A CN 201610288709 A CN201610288709 A CN 201610288709A CN 105854501 A CN105854501 A CN 105854501A
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- collapsible tube
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- 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
- B01D51/04—Amassing the particles, e.g. by flocculation by seeding, e.g. by adding particles
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- 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
- B01D2258/025—Other waste gases from metallurgy plants
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Abstract
The invention discloses an emission reduction system for fine particles in the sintering process of iron ore, and belongs to the technical field of emission reduction of pollutants in the sintering process of iron ore. The emission reduction system for fine particles in the sintering process of iron ore comprises a fine particle atomizing and agglomerating device, an agglomerating liquid adding device and a dust removing device. The bottom of a sintering pallet is connected with a main flue through air bellows, air draft smoke is combined in the main flue through the bottom of the sintering pallet via the air bellows, the atomizing and agglomerating device, the agglomerating liquid adding device and the dust removing device are arranged on the main flue, and the smoke flows into the atomizing and agglomerating device from the main flue, and is subjected to dust removal by the dust removing device and then discharged into a chimney by a draught fan. By means of the emission reduction system, agglomerating liquid fog drops with fine particles adsorbed nucleate, collide and grow under the low-pressure condition, and form large particle agglomerated mater, the fine particles growing through agglomeration are removed with the dust removing device, and thus a bran-new emission reduction approach is provided for emission reduction of the fine particles in the sintering process of iron ore.
Description
Technical field
The present invention relates to Ore Sintering Process pollution reduction technical field, more particularly, it relates to a kind of Ore Sintering Process is micro-
The emission-reducing system of fine particle.
Background technology
Pellet refers to be entered the general name of the particulate matter of human respiratory tract by nose and mouth, represents (environment with PM10
The aerodynamic diameter granule less than 10 microns in air).PM2.5 refers to that in surrounding air, aerodynamic equivalent diameter is less than
Particulate matter equal to 2.5 microns.It can long period be suspended in air, its in atmosphere content concn the highest, just represent sky
Gas pollutes the most serious.Although PM2.5 is the component that in earth atmosphere composition, content is little, but it is to air quality and visibility
Etc. there being important impact.Compared with thicker Atmospheric particulates, PM2.5 particle diameter is little, and area is big, and activity is strong, the most subsidiary poisonous,
Harmful substance (such as, heavy metal, microorganism etc.), and time of staying length in an atmosphere, fed distance are remote, thus to human body
Healthy and atmosphere quality impact is bigger, and, it can enter human body alveolar even blood circulation, directly results in
The diseases such as cardiovascular diseases.Current pellet pollutes oneself through becoming prominent atmospheric environment problem, causes the height of countries in the world
Degree is paid attention to.It has serious harm to health, is also to cause atmospheric visibility reduction, acid deposition, Global climate change, light
The key factor of the great environmental problem such as chemical fumes.The most all centering PM2.5 such as the air quality standard of the U.S., European Union, Britain etc.
Clearly required；In February, 2012, new " ambient air quality " of Environment Protect in China cloth promulgated by the ministries or commissions of the Central Government
(GB3095-2012) PM2.5 mean concentration limit value, it is additionally arranged.
Steel and iron industry is key pillars of the national economy industries, is again power consumption and heavy polluter.China's crude steel annual production at present is
Through more than 800,000,000 tons, close to the 50% of whole world yield.According to " 2012 Chinese environmental statistics annual report ", ferrous metal smelting and
Calendering processing industry cigarette (powder) dirt discharge capacity is 181.3 ten thousand t, accounts for the 18.9% of major investigation industrial undertaking discharge capacity, is positioned at the 3rd.
The source resolution of PM10 (particulate matter of particle diameter≤10 μm) and PM2.5 (particulate matter of particle diameter≤2.5 μm) shows, Ferrous Metallurgy
Industry has become as one of main source of PM10 and PM2.5 in China's air.Sintering circuit is in Production Processes In Steel Industry
Requisite link, but be PM10 and the PM2.5 emission source of steel and iron industry maximum, account for 40% left side of its total release
Right[1-3].Owing to agglomeration for iron mine is that convulsion process and smoke moisture are big, current sintering plant mainly use silently electric cleaner to purify burning
Particulate matter in knot flue gas, electric cleaner is preferable to the coarseparticulate removal effect in flue gas silently, but for particle diameter less than 10 μm
Fine particle, owing to it is higher than resistance, charge capacity is poor, efficiency of dust collection significantly reduces.Sintering flue gas is through electrostatic precipitation
After, in flue gas, the particulate matter of more than 90% is PM10, and the particulate matter of more than 80% is PM2.5[4]。
Sintering flue gas is that air is formed through sinter bed, the physicochemical change through series of complex during down draft sintering
's.Owing to being affected by factors such as material condition, mix material proportioning, technological parameters so that the chemical composition of sintering flue gas is multiple
Miscellaneous changeable, flue gas flow, temperature and the fluctuation of each pollutant levels are the biggest.Being summed up, sintering flue gas has following typical feature[5-7]:
(1) sintering process air leak rate of air curtain is up to 40-50% so that produce exhaust gas volumn very big, and producing 1t sintering deposit according to statistics can produce
4000-6000m3Exhaust gas volumn；And exhaust gas volumn changes according to the difference of material composition, technological parameter so that exhaust gas volumn
Fluctuate bigger；
(2) flue-gas temperature fluctuation range is big, changes with process conditions, fuel ratio, and flue-gas temperature exists: 80-160 DEG C
Fluctuation；
(3) humidity of flue gas is relatively big, and moisture is about 10%.Need to add appropriate moisture during sintered mix to carry out
Mixing, granulation, thus ensure the breathability of the bed of material；
(4) big containing Dust Capacity in flue gas, wherein comprise a large amount of fine particle, sintering deposit per ton produces the dust of 20-40kg；
(5) smoke components is complicated, and it comprises multiple pollutant, such as: fine particle, SO2, COx, NOx, HCl,
HF and two English classes etc..
The feature such as complicated just because of sintering smoke components, flow is big and pollutant levels are low, although sintering flue gas takes relatively
The cleaner of high purification efficiency, but unsatisfactory to the removal effect of fine particle.
In sintering flue gas fine particle owing to specific surface area is big, surface activity strong, can be enriched with alkali metal that sintering process generates (K,
Na), heavy metal (Hg, Pb, Cr, Cu, Cd, As) and organic pollutant (VOCs, PCDD/Fs) etc. are poisonous has
Pest matter[8], there is the most carcinogenic, mutagenesis and teratogenesis, be discharged into air formed aerosol, be induction haze, acid rain,
The key factor of depletion of the ozone layer etc., its pollution problem is directly connected to living environment and the life quality of its people.Realize sintered
The fine particle of journey reduces discharging extremely the most urgent.
Through retrieval, the existing emission-reduction technology scheme about flue gas fine particulate matter.As: the title of innovation and creation: Industrial Stoves cigarette
Gas PM2.5Dust and heavy metal administer removal device[9], (China Patent No.: ZL201220721358.X, the applying date:
2012-12-24), by arranging filter bag on flue gas path, and by bag cage inside filter bag, to flue gas PM2.5Dust subtracts
Row；Oarse-grained pollutant are had preferably with regard to emission reduction effect by this technology, but the PM in flue gas2.5Emission reduction effect limited.
Additionally, innovation and creation is entitled: a kind of method of agglomeration for iron mine flue gas stages cycle[10](China Patent No.:
ZL201310443223.0, the applying date: 2013-09-26), a kind of method of agglomeration for iron mine energy-saving and emission-reduction[11](China Patent No.:
ZL201510137762.0, the applying date: 2015-03-27) etc., these technical schemes can realize sintering the multiple pollutant in flue gas
Collaborative reduction of discharging, although the discharge of big dust particle in flue gas can be reduced；But to subtracting of the fine particle in sintering flue gas
Row's effect is extremely limited.Sintering Gas phase Smoke is than other waste gas in addition, has the characteristics such as complicated component, flue gas flow are huge, makes
The effective emission-reduction technology that must be applicable to sinter flue gas fine particulate matter is the most untapped out.Exigence seeks suitable reduction of discharging way
Footpath, it is achieved the reduction of discharging of the subparticle of sintering process.
List of references:
[1] Lv Yan. brief talk China's steel industry pollution situation and the cleaning production environment protection of prophylactico-therapeutic measures [C] .2014 Jing-jin-ji region steel industry
Exchanging meeting .2014,95-96.
[2] Yan Xianghong. Baoshan District of Shanghai air fine grained aerosol PM2.5 properties study and source resolution [D]. Shanghai: East China science and engineering is big
Learn, 2011,42-50.
[3]S.JAGATHLAL.Assessing the PM10footprint of an iron and steel plant on ambient air quality:
Modelling PM10emissions from the Arcelormittal Vanderbijlpark works iron and steel plant
[D].University of the Witwatersrand,Johanesburg,2012,1-5.
[4] horse capital. the granular material discharged characteristic research of iron and steel enterprise's typical production process [D]. Southwest University, 2009,24-28.
[5] Shen Xiaolin, Liu Daoqing, Lin Yu, etc. the research and development of Baosteel Sitnering Plant flue gas desulfurization technique and application [J]. bao steel technology, 2009 (3):
7-11.
[6]Fuzhong W,Wenhao W.Study on Flue Gas Desulfurization of Sintering in Pilot-Scale
Experiment[C]//Computer Distributed Control and Intelligent Environmental Monitoring
(CDCIEM),2011International Conference on.IEEE,2011:1737-1741.
[7] Chen Kaihua, Song Cunyi, Zhang Donghui, etc. the comparison [J] of sintering flue gas combined desulfurization and denitration technique. agglomerates of sintered pellets, 2008,
33 (5): 29-32.
[8]C.PENG,Z.C.GUO,F.L.ZHANG.Discovery of potassium chloride in the sintering dust by
chemical and physical characterization[J].ISIJ International,2009,48(10):1398-1403.
[9] Liaoning ten thousand and environmental protection industry company limited. industrial furnace smoke PM2.5 dust and heavy metal administer removal device: China,
ZL201220721358.X[P].2013-09-11.
[10] Central South University. a kind of method of agglomeration for iron mine flue gas stages cycle: China, ZL201310443223.0 [P] .2014-01-08.
[11] Iron and Steel Research Geueral Inst, steel grinds bright Chinese workers journey Technology Co., Ltd.. a kind of method of agglomeration for iron mine energy-saving and emission-reduction: China,
ZL201510137762.0[P].2015-07-01.
Summary of the invention
1. invention to solve the technical problem that
It is an object of the invention to overcome in prior art, Ore Sintering Process is the primary discharge source of fine particle, existing
Emission-reducing system be difficult to effectively deviate from the deficiency of the fine particle sintered in flue gas, it is provided that and a kind of fine of Ore Sintering Process
The emission-reducing system of grain thing, it is achieved effective removing of sintering process fine particle.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that the present invention provides is:
The emission-reducing system of a kind of Ore Sintering Process fine particle of the present invention, is atomized agglomeration device, group including fine particle
Poly-liquid adding apparatus and dust arrester, be connected with flue collector by bellows bottom pallet, convulsion flue gas by pallet bottom
In bellows import flue collector, flue collector arranging atomization agglomeration device, reunion liquid adding apparatus and dust arrester, flue gas is by leading
Flue flows into atomization agglomeration device, is entered chimney by blower fan after removing dust device dedusting.
Further, described atomization agglomeration device includes collapsible tube, Cylindrical connecting tube and expansion pipe；
Wherein: collapsible tube is the different conical pipe of two ends internal diameter with expansion pipe, and one end that described collapsible tube is connected with flue collector is
Collapsible tube arrival end, the internal diameter of collapsible tube arrival end is identical with the internal diameter of flue collector, and collapsible tube is receipts near one end of expansion pipe
The draw port of export, the collapsible tube port of export is identical with expansion tube inlet end internal diameter；The collapsible tube port of export and expansion tube inlet end are by circle
Column connecting pipe is connected, and one end away from collapsible tube of described expansion pipe is the expansion pipe port of export, expansion pipe port of export internal diameter and master
The internal diameter of flue is identical, and is connected with flue collector；The centrage of above-mentioned collapsible tube, Cylindrical connecting tube and expansion pipe is at same
On straight line；Flue gas is entered atomization agglomeration device by collapsible tube arrival end, then is flowed into expansion pipe by Cylindrical connecting tube, expansion pipe go out
Mouth end flows out atomization agglomeration device.
Further, reunion liquid adding apparatus includes reunion liquid reservoir part, air compressor machine and reunion liquid shower nozzle, and reunion liquid stores
Parts are connected with the entrance point of air compressor machine by pipeline, and the air compressor machine port of export is connected, wherein with reunion liquid shower nozzle by pipeline: group
Poly-liquid reservoir part is used for storing reunion liquid, and air compressor machine enters reunion liquid shower nozzle for reunion liquid and provides power, and reunion liquid shower nozzle is used for
By reunion liquid mist, and spray into atomization agglomeration device.
Further, reunion liquid shower nozzle is arranged on the tangent to periphery of collapsible tube cross section uniformly.
Further, reunion liquid shower nozzle place plane is L1 with the horizontal range of collapsible tube arrival end, and reunion liquid shower nozzle place is put down
Face is L2, L2=0.5-1.0L1 with the horizontal range of the collapsible tube port of export.
Further, the angle between reunion liquid shower nozzle centrage and collapsible tube tube wall is a, 30≤a≤45 °.
Further, collapsible tube cross section is disposed with uniformly 2-16 reunion liquid shower nozzle.
Further, the disposed outside of collapsible tube has circulating line, circulating line entrance point to be connected with the air compressor machine port of export, ring
Being provided with 2-16 outlet on shape pipeline, and the outlet of circulating line is connected with reunion liquid shower nozzle, reunion liquid is flowed into by circulating line
Reunion liquid shower nozzle.
Further, described expansion pipe is provided with reunion liquid shower nozzle.
Further, reunion liquid reservoir part is provided with agitating device.
3. beneficial effect
Use the technical scheme that the present invention provides, compared with existing known technology, there is following remarkable result:
The atomization agglomeration device of the present invention includes collapsible tube, Cylindrical connecting tube and expansion pipe, and flue gas is entered mist by collapsible tube arrival end
Changing agglomeration device, then flowed into expansion pipe by Cylindrical connecting tube, the flue gas in flue collector is flowed into collapsible tube by collapsible tube arrival end, by
Diminishing rapidly in collapsible tube caliber so that the flue gas flow rate in collapsible tube increases rapidly, reunion liquid shower nozzle is at atomization agglomeration device
Collapsible tube sprays into vaporific reunion liquid so that reunion liquid and the subparticle in flue gas and contact, moistening, adhesion, due to cigarette
Gas is increased by speed during Cylindrical connecting tube, produces low pressure at Cylindrical connecting tube and expansion pipe so that be adsorbed with fine particle
Reunion liquid mist drops in nucleation under low voltage situations, collides, grows up, the bulky grain aggregate of formation.And use dust arrester to remove group
The poly-fine particle grown up, it is achieved that the efficient emission-reducing of fine particle, the reduction of discharging for Ore Sintering Process fine particle carries
Supply brand-new reduction of discharging approach.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of embodiment 1-9；
Fig. 2 is the arrangement schematic diagram of the reunion liquid shower nozzle of the collapsible tube of embodiment 1-9；
Fig. 3 is sintering machine and the emission-reducing system schematic diagram of embodiment 1-9；
Fig. 4 is the reunion liquid shower nozzle position relationship schematic diagram with collapsible tube tube wall of embodiment 1-9；
Fig. 5 is the overall structure schematic diagram of embodiment 10；
Fig. 6 is the arrangement schematic diagram of the reunion liquid shower nozzle of the expansion pipe of embodiment 10；
Fig. 7 is the overall structure schematic diagram of embodiment 11；
Fig. 8 is that the expansion pipe of embodiment 11 arranges two and forms a team poly-liquid shower nozzle；
Fig. 9 is that embodiment 12 is reunited the structural representation that liquid shower nozzle is arranged in collapsible tube；
Figure 10 is the flow chart of fine particle discharge-reducing method of the present invention；
Figure 11 is that the present invention reunites the flow chart of liquid and preparation method thereof.
Label declaration in schematic diagram:
1, flue collector；2, atomization agglomeration device；21, collapsible tube；22, Cylindrical connecting tube；23, expansion pipe；3, reunion liquid
Adding apparatus；31, reunion liquid reservoir part；32, air compressor machine；33, reunion liquid shower nozzle；4, dust arrester；5, blower fan；6、
Pallet；7, bellows；8, circulating line；9, agitating device.
Detailed description of the invention
For further appreciating that present disclosure, below in conjunction with embodiment, the invention will be further described.
Embodiment 1
Shown in Fig. 1,2,3 and 4, the emission-reducing system of a kind of Ore Sintering Process fine particle of the present embodiment, including
Fine particle atomization agglomeration device 2, reunion liquid adding apparatus 3 and dust arrester 4, sinter mixture is blended, pelletize after by
Distribution device, dress is layered on sintering pallet 6, and sinter mixture carries out down draft sintering after igniting, and sintering flue gas is through burning
Ramming material layer, is connected with flue collector 1 by bellows 7 bottom pallet 6, convulsion flue gas by bottom pallet 6 through bellows 7
Import in flue collector 1, flue collector 1 arrange atomization agglomeration device 2, reunion liquid adding apparatus 3 and dust arrester 4, flue gas by
Flue collector 1 flows into atomization agglomeration device 2, is entered chimney by blower fan 5 after removing dust device 4 dedusting；Subparticle in flue gas
Thing atomization agglomeration device 2 in reunion forming core, nucleation and growth process, and in the dust arrester 4 at rear portion remove reunite grow up fine
Particulate matter.
Above-mentioned atomization agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23；Wherein: collapsible tube 21 He
Expansion pipe 23 is the conical pipe that two ends internal diameter is different, and one end that described collapsible tube 21 is connected with flue collector 1 is that collapsible tube 21 enters
Mouth end, the internal diameter of collapsible tube 21 arrival end is identical with the internal diameter of flue collector 1, and collapsible tube 21 is receipts near one end of expansion pipe 23
The draw 21 port of export, collapsible tube 21 port of export is identical with expansion pipe 23 arrival end internal diameter；Collapsible tube 21 port of export and expansion pipe
23 arrival ends are connected by Cylindrical connecting tube 22, and described expansion pipe 23 exports for expansion pipe 23 away from one end of collapsible tube 21
End, expansion pipe 23 port of export internal diameter is identical with the internal diameter of flue collector 1, and is connected with flue collector 1；Above-mentioned collapsible tube 21,
The centrage of Cylindrical connecting tube 22 and expansion pipe 23 is on same straight line；Flue gas is entered atomization by collapsible tube 21 arrival end and reunites
Device 2, then flowed into expansion pipe 23 by Cylindrical connecting tube 22, and flowed out atomization agglomeration device 2 by expansion pipe 23 port of export.Main
Flue gas in flue 1 is flowed into collapsible tube 21 by collapsible tube 21 arrival end, owing to collapsible tube 21 caliber diminishes rapidly so that shrink
Flue gas flow rate in pipe 21 increases rapidly, and flue gas is increased by speed during Cylindrical connecting tube 22, produces low pressure in its vicinity, makes
Obtain the particulate matter collision in flue gas more violent.
Described reunion liquid adding apparatus 3 includes reunion liquid reservoir part 31, air compressor machine 32 and reunion liquid shower nozzle 33, Qi Zhongtuan
Poly-liquid reservoir part 31 is provided with agitating device 9 so that the reunion liquid uniform component in reunion liquid reservoir part 31 is stable,
Prevent the reunion liquid generation component segregation being made into, thus affect the emission reduction effect of fine particle.Reunion liquid reservoir part 31 is passed through
Pipeline is connected with the entrance point of air compressor machine 32, and air compressor machine 32 port of export is connected, wherein with reunion liquid shower nozzle 33 by pipeline: group
Poly-liquid reservoir part 31 is used for storing reunion liquid, and air compressor machine 32 enters reunion liquid shower nozzle 33 for reunion liquid and provides power, reunion liquid
Shower nozzle 33 is used for reunion liquid mist, and sprays into atomization agglomeration device 2, and described reunion liquid shower nozzle 33 is arranged on collapsible tube 21
On.Reunion liquid containing agglomerator is under the driving of air compressor machine 32, by reunion liquid reservoir part 31 flows into reunion liquid shower nozzle 33,
Atomization reunion liquid is sprayed into atomization agglomeration device 2 by reunion liquid shower nozzle 33, and the mist droplet particle size after atomization is 30-150 μm；Atomization is reunited
Collapsible tube 21 caliber of device 2 diminishes rapidly so that flue gas is increased by speed during Cylindrical connecting tube 22, produces in its vicinity
Low pressure, so that reunion liquid produces adsorption to subparticle, the reunion liquid after the particulate matter in flue gas and atomization fully connects
Touch, moistening, adhesion, nucleation, continuous reunion collision is grown up so that subparticle is constantly reunited and grown up.
Reunion liquid shower nozzle 33 is arranged on the tangent to periphery of collapsible tube 21 cross section uniformly, and the flue gas flow rate in collapsible tube 21 is not
Disconnected increasing, the reunion liquid mist after the atomization of reunion liquid shower nozzle 33 is dripped can in collapsible tube 21 with flue gas fully, uniformly mix；This horizontal stroke
Cross section is the vertical tangent plane of the centrage being perpendicular to collapsible tube 21, reunion liquid shower nozzle 33 place plane and collapsible tube 21 arrival end
Horizontal range is L1, and reunion liquid shower nozzle 33 place plane is L2, L2=0.5L1 with the horizontal range of collapsible tube 21 port of export,
I.e. reunion liquid shower nozzle 33 place plane and the horizontal range of collapsible tube 21 arrival end are more than reunion liquid shower nozzle 33 place plane and contraction
The horizontal range of pipe 21 port of export so that flue gas is entering after collapsible tube 21, flue gas flow rate increase during with atomization after
Reunion liquid mist drips mixing, contact.
Angle between reunion liquid shower nozzle 33 centrage and collapsible tube 21 tube wall is a, a=45 °, at collapsible tube 21 edge airflow
Present and collapsible tube 21 tube walls parallel state, when a=45 °, if the speed that the reunion liquid mist that reunion liquid shower nozzle 33 sprays into is dripped is
V, then it is vcos a along the speed of collapsible tube 21 tube wall, increases reunion liquid mist and drips and the collision probability of granule in flue gas；This
Outward, reunion liquid mist is dripped constantly to collapsible tube 21 central motion so that be also fully contacted with the flue gas of collapsible tube 21 center.Receive
It is disposed with 16 reunion liquid shower nozzles 33 on the draw 21 cross section uniformly, promotes that reunion liquid mist is dripped with collapsible tube 21 fine
Particulate matter contact, moistening, adhesion.
The disposed outside of collapsible tube 21 has circulating line 8, circulating line 8 entrance point to be connected with air compressor machine 32 port of export, annular
Being provided with 16 outlets on pipeline 8, and the outlet of circulating line 8 is connected with reunion liquid shower nozzle 33, reunion liquid is by circulating line
8 flow into reunion liquid shower nozzle 33；It is provided with 16 outlets on circulating line 8, uniform and stable for liquid of reuniting can be stored from reunion liquid
Parts 31 are transported in reunion liquid shower nozzle 33 so that what reunion liquid shower nozzle 33 was uniform, stable sprays into reunion liquid.
Described dust arrester 4 is electrostatic precipitator, and the fine particle in flue gas drips with reunion liquid mist at atomization agglomeration device 2
Moistening, adhesion, further forming core, grow up after, particulate matter after being grown up by electrostatic precipitator is removed, and can realize sintering
The reunion of process fine particle reduces discharging.
The flue gas fine particulate matter of the present embodiment reduces discharging compound agglomerator, and each component forms according to following quality: aluminium polychlorid 10g,
Sodium carboxymethyl cellulose 30g, polyacrylamide 30g, additive 2g.Its additive is solid additive, described additive
Being made up of activated carbon and coke powder, described additive is formed by following mass percent: activated carbon 90%, and coke powder 10% is described
Activated carbon particle size require: 74 μm≤activated carbon particle size≤100 μm, coke powder Particle size requirements: 74 μm≤coke powder particle diameter≤100 μm.
As shown in Figure 10 and Figure 11, the discharge-reducing method of the present embodiment sintering flue gas fine particulate matter:
Step one: preparation reunion liquid (A) weighs aluminium polychlorid 10g, sodium carboxymethyl cellulose 30g, polypropylene by mass parts
Amide 30g, by solid particle aluminium polychlorid 10g, sodium carboxymethyl cellulose 30g, polyacrylamide 30g mix homogeneously, obtains
Mixture A；
(B) weighing additive 2g by mass parts, described additive is solid additive, adds in mixture A, and mixing is all
Even, obtain compound agglomerator；
(C) the compound agglomerator in step (B) is mixed with water, and is uniformly mixed, and the quality of agglomerator and water it
Ratio is 1:5000, then adds Ca (OH)2Powder regulation solution PH is 8.5, prepares reunion liquid；
Step 2: subparticle is reunited
In Ore Sintering Process, reunion liquid is added in reunion liquid reservoir part 31, flue collector 1 is provided with atomization reunion dress
Putting 2, the reunion liquid in reunion liquid reservoir part 31 is transported to reunion liquid shower nozzle 33 through air compressor machine 32, and reunion liquid shower nozzle 33 is at mist
Changing and spray into vaporific reunion liquid in the collapsible tube 21 of agglomeration device 2, the particulate matter in flue gas and reunion liquid are at atomization agglomeration device 2
Reunite contact, moistening, adhesion, nucleation, collide, grow up.Wherein: the mist droplet particle size of the reunion liquid sprayed into is 30-150 μm,
Every cubic metre of straying quatity sintering liquid of reuniting in flue gas is 15ml.
Atomization agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23, and flue gas is entered by collapsible tube 21 arrival end
Entering to be atomized agglomeration device 2, then flowed into expansion pipe 23 by Cylindrical connecting tube 22, the flue gas in flue collector 1 is by collapsible tube 21 entrance
End flows into collapsible tube 21, owing to collapsible tube 21 caliber diminishes rapidly so that the flue gas flow rate in collapsible tube 21 increases rapidly, and group
Poly-liquid shower nozzle 33 sprays into vaporific reunion liquid in the collapsible tube 21 of atomization agglomeration device 2 so that micro-with flue gas of reunion liquid
Fine grained with contact, moistening, adhesion, due to flue gas by Cylindrical connecting tube 22 time speed increase, Cylindrical connecting tube 22 He
Expansion pipe 23 produces low pressure so that is adsorbed with the reunion liquid mist of fine particle and drops in nucleation under low voltage situations, collides, grows up,
The bulky grain aggregate formed.
Step 3: dust arrester traps
Use electrostatic precipitator reunion is grown up formed bulky grain aggregate remove, i.e. utilize the highfield in electrostatic precipitator to make
Gas ionization, i.e. produces corona discharge, and then makes particle cluster separate from gas, thus suppress fine particle
Discharge, it is achieved the reduction of discharging of subparticle in flue gas.
Sintering the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, record is such as table 1.Detection dust arrester 4
SO in rear sintering flue gas2、NOXConcentration of emission, record such as table 2.
Comparative example 1
This comparative example is that the basic process of this comparative example is with embodiment 1, and difference is: on flue collector as reference test
It is fitted without being atomized agglomeration device 2, in flue collector 1, does not also spray into reunion liquid, sinter in flue gas after detection dust arrester 4
The concentration of emission of PM2.5 and PM10, record is such as table 1.SO in flue gas is sintered after detection dust arrester 42、NOXDischarge dense
Degree, record is such as table 2.
Comparative example 2
The reduction of discharging process of this comparative example is with embodiment 1, and difference is: be fitted without being atomized agglomeration device 2 on flue collector, but
Spraying into reunion liquid in flue collector 1, agglomerator is only made up of aluminium polychlorid, sodium carboxymethyl cellulose and polyacrylamide,
Without solid additive in agglomerator, after detection dust arrester 4, sinter the concentration of emission of PM2.5 and PM10, record in flue gas
Such as table 1.
Comparative example 3
The reduction of discharging process of this comparative example is with embodiment 1, the quality hundred of aluminium polychlorid, sodium carboxymethyl cellulose and polyacrylamide
Dividing content same as in Example 1, difference is: agglomerator is only by aluminium polychlorid, sodium carboxymethyl cellulose and poly-third
Acrylamide forms, and without solid additive in agglomerator, sinters the row of PM2.5 and PM10 in flue gas after detection dust arrester 4
Putting concentration, record is such as table 1.
Test the agglomerating effect with reunion efficiency rating PM10 (PM2.5), be defined as PM10 in flue gas (PM2.5)
The percentage ratio that its concentration reduces after reuniting, it may be assumed that
η=(1-N1/N0) × 100%
PM10 (PM2.5) concentration (mg/m during wherein N0 is initial flue gas3), N1 is PM10 (PM2.5) in flue gas after reuniting
Concentration (mg/m3)。
PM10, PM2.5 concentration of emission in the flue gas of table 1 sintering test
| PM10(mg/m3) | PM10 emission reduction efficiency (%) | PM2.5(mg/m3) | PM2.5 emission reduction efficiency (%) | |
| Comparative example 1 | 12.6 | —— | 6.9 | —— |
| Comparative example 2 | 9.2 | 27.0% | 5.8 | 15.9% |
| Comparative example 3 | 6.9 | 45.2% | 4.8 | 30.4% |
| Embodiment 1 | 4.3 | 65.9% | 3.2 | 53.6% |
(1) contrasted by comparative example 1, comparative example 2, comparative example 3 and embodiment 1, no matter reunite liquid in which way
Join in flue gas, the discharge of fine particle in flue gas can be reduced.
(2) comparative example 2 compares comparative example 1, and PM10 emission reduction efficiency is 27.0%, and PM2.5 emission reduction efficiency is 15.9%, fine
The emission reduction efficiency of particulate matter is poor, and its reason is that sintering process flue gas flow is big, uses general mode to add reunion liquid, makes
Liquid of must reuniting is difficult to be fully contacted with the particulate matter in flue gas, moistening, it is also difficult to the forming core realizing particulate matter is grown up, and burns in addition
Knot smoke components is complicated, and flue gas flow and composition fluctuation are big so that the emission reduction effect of fine particle is very limited.
(3) the PM10 emission reduction efficiency of comparative example 3 is 45.2%, and PM2.5 emission reduction efficiency is 30.4%, compares comparative example 2,
PM10 and PM2.5 emission reduction efficiency is significantly increased, and atomization agglomeration device 2 significantly improves the reunion efficiency of reunion liquid.Machine
Reason is analyzed its reason and is: atomization agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23, and flue gas is by receiving
The draw 21 arrival end enters atomization agglomeration device 2, owing to collapsible tube 21 caliber diminishes rapidly so that the flue gas in collapsible tube 21
Flow velocity increases rapidly, and reunion liquid shower nozzle 33 sprays into vaporific reunion liquid in the collapsible tube 21 of atomization agglomeration device 2 so that group
Poly-liquid and the subparticle in flue gas and contact, moistening, adhesion, owing to flue gas is increased by speed during Cylindrical connecting tube 22,
Cylindrical connecting tube 22 and expansion pipe 23 produce low pressure so that the reunion liquid mist being adsorbed with fine particle drops in become under low voltage situations
Core, collide, grow up, the bulky grain aggregate of formation.Use electrostatic precipitator reunion is grown up formed bulky grain aggregate go
Remove so that in flue gas, the concentration of emission of fine particle significantly reduces.
Needing to clearly state, existing research worker generally believes that Venturi tube is poor to the emission reduction effect of fine particle herein,
And owing to the drag losses of Venturi tube is relatively big, the research making Venturi tube be applied to sinter the reduction of discharging of flue gas fine particulate matter rarely has report,
The applicant uses Venturi effect to devise atomization agglomeration device 2 so that in flue gas, the concentration of emission of fine particle significantly drops
Low.Break the technology prejudice of prior art.
(4) comparing comparative example 3, the PM10 emission reduction efficiency of embodiment 1 has reached 65.9%, and PM2.5 emission reduction efficiency is 53.6%,
Solid additive in agglomerator significantly improves the reunion efficiency of reunion liquid, use electrostatic precipitator reunion is grown up formed big
Particle cluster is removed so that in flue gas, the concentration of emission of fine particle significantly reduces, and this makes applicant the most surprised；But
It is that its kinetic collision, adhesive mechanism are still not clear.By seminar for several times, its reaction mechanism is discussed, and thinks that its reason may
It is:
1) flue gas by Cylindrical connecting tube 22 time speed increase, formed lower pressure environment so that reunion liquid under low voltage situations with micro-
Fine particle collides, grows up, when including solid additive during reunion liquid mist is dripped so that solid additive drips in reunion liquid mist
It is internally formed a stable forming core parent, after fine particle contacts with reunion liquid droplet surface, the bulky grain group directly formed
Polymers, eliminates fine particle and adheres to the process of forming core, thus accelerate the reunion speed of particulate matter.
2) fine particle is reunited and is mainly relied on reunion liquid mist to drip contact with fine particle, collide and grow up, but in contraction
Flue gas flow rate in pipe 21 increases rapidly, although improves reunion liquid mist and drips and the probability of fine particle collision, but due to cigarette
The speed that in gas, fine particle and reunion liquid mist are dripped is relatively big, during contact-impact, has part fine particle directly to wear
Reunion liquid mist is dripped thoroughly so that reunion liquid is difficult to active adsorption fine particle, forms a large amount of invalid collision；In reunion liquid mist is dripped
When including solid additive, fine particle at a high speed is difficult to penetrate reunion liquid mist and drips, and improves effective collision probability.
3) after fine particle and reunion liquid mist drip collision entrance reunion liquid, due to the viscous resistance in being dripped by reunion liquid mist
Impact, fine particle can again rest on reunion liquid mist and drip top layer, without dripping inside in reunion liquid mist；And liquid mist of reuniting
Drip particulate matter is sticked and rely primarily on the surface layer that reunion liquid mist is dripped, drip top layer when poly-liquid mist and be constantly occupied full, new particulate matter
Can not be sticked owing to not reaching the liquid level of droplet when dripping collision with reunion liquid mist；In reunion liquid mist is dripped, include solid add
When adding agent, owing to solid additive has loose structure, fine particle there is adsorption, when fine particle and reunion liquid
After droplet collision enters reunion liquid, can be attracted on activated carbon and coke so that reunion liquid mist is dripped the liquid level on top layer and come out,
New particulate matter can be fully contacted with reunion liquid mist dropping liquid face, thus improves reunion efficiency.
The atomization agglomeration device 2 of the present invention includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23, and flue gas is by collapsible tube 21
Arrival end enters atomization agglomeration device 2, then is flowed into expansion pipe 23 by Cylindrical connecting tube 22, and the flue gas in flue collector 1 is by collapsible tube
21 arrival ends flow into collapsible tube 21, owing to collapsible tube 21 caliber diminishes rapidly so that the flue gas flow rate in collapsible tube 21 increases rapidly
Greatly, reunion liquid shower nozzle 33 sprays into vaporific reunion liquid in the collapsible tube 21 of atomization agglomeration device 2 so that reunion liquid and flue gas
In subparticle with contact, moistening, adhesion, due to flue gas by Cylindrical connecting tube 22 time speed increase, at Cylindrical connecting tube
22 and expansion pipe 23 produce low pressure so that be adsorbed with the reunion liquid mist of fine particle drop in nucleation under low voltage situations, collision,
Grow up, the bulky grain aggregate of formation.And use dust arrester to remove the fine particle grown up of reuniting, it is achieved that subparticle
The efficient emission-reducing of thing, the reduction of discharging for Ore Sintering Process fine particle provides brand-new reduction of discharging approach.
A small amount of additive is added in proposing of the invention in agglomerator, significantly improves the reunion efficiency of reunion liquid, from
And eliminate fine particle and adhere to the process of forming core, accelerate the reunion speed of particulate matter, and fine particle at a high speed is difficult to
Penetrate reunion liquid mist to drip, improve effective collision probability.
Owing to activated carbon and coke have loose structure, fine particle there is adsorption, when fine particle and reunion liquid mist
After dripping collision entrance reunion liquid, can be attracted on activated carbon and coke so that reunion liquid mist is dripped the liquid level on top layer and come out,
New particulate matter can be fully contacted with reunion liquid mist dropping liquid face, thus improves reunion efficiency.With the addition of a small amount of additive, just
PM10 and PM2.5 emission reduction efficiency is significantly improved, and PM10 emission reduction efficiency has reached 65.9%, and PM2.5 emission reduction efficiency reaches
53.6%, achieve significant emission reduction effect.
SO2、NOXEmission reduction efficiency use below equation calculate:
PM10 (PM2.5) concentration (mg/m during wherein C0 is initial flue gas3), C1 is PM10 (PM2.5) in flue gas after reuniting
Concentration (mg/m3)。
SO in the flue gas of table 2 sintering test2、NOXConcentration of emission
| SO2(mg/m3) | SO2Emission reduction efficiency (%) | NOX(mg/m3) | NOXEmission reduction efficiency (%) | |
| Comparative example 1 | 659 | —— | 322 | —— |
| Embodiment 1 | 378 | 42.6% | 256 | 20.5% |
As shown in Table 2, the SO after spraying into the agglomerator of the present invention, in flue gas2Concentration of emission by 659mg/m3Drop to 378
mg/m3, NOXConcentration of emission by 322mg/m3Drop to 256mg/m3, not only fine particle is had adsorption, also
To the SO in flue gas2, NOx, two English have adsorption, thus realize the Collaborative Control of multiple pollutant.Its reason exists
In: the agglomerator solution sprayed into includes activated carbon and coke has loose structure, not only fine particle is had adsorption,
Also to the SO in flue gas2, NOx, two English have addition Ca (OH) in adsorption, and reunion liquid2Powder, can adsorb
SO in flue gas2, the sour gas such as NOx；And promote fine particle drip with reunion liquid mist contact, moistening, adhesion, thus
Improve reunion efficiency.
Embodiment 2
The substance of the present embodiment is with embodiment 1, its difference: described additive is made up of activated carbon and zeolite,
Additive is formed by following mass percent: activated carbon 85%, zeolite 15%, and described activated carbon particle size requires: 74 μm≤work
Property carbon granule footpath≤100 μm, sized zeolite particles requires: 74 μm≤sized zeolite particles≤100 μm.
Sinter the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, and calculate subtracting of PM2.5 and PM10
Row's efficiency, the emission reduction efficiency of PM2.5 is 56.4%, and the emission reduction efficiency of PM10 is 49.0%.
Embodiment 3
The substance of the present embodiment is with embodiment 1, its difference: described additive is made up of activated carbon and zeolite,
Additive is formed by following mass percent: activated carbon 95%, zeolite 5%.
Sinter the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, and calculate subtracting of PM2.5 and PM10
Row's efficiency, the emission reduction efficiency of PM2.5 is 60.2%, and the emission reduction efficiency of PM10 is 48.8%.
Embodiment 4
The substance of the present embodiment is with embodiment 1, its difference: described additive is made up of activated carbon and zeolite,
Additive is formed by following mass percent: activated carbon 90%, zeolite 10%.
Sinter the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, and calculate subtracting of PM2.5 and PM10
Row's efficiency, the emission reduction efficiency of PM2.5 is 55.9%, and the emission reduction efficiency of PM10 is 48.6%.
Embodiment 5
The substance of the present embodiment is with embodiment 1, its difference: described additive is by activated carbon, coke powder, swollen
Profit soil becomes with Suzhou local soil type, and described additive is formed by following mass percent: activated carbon 90%, coke powder 8%, bentonite
1%, Suzhou soil 1%, described bentonite Particle size requirements: 74 μm≤bentonite particle diameter≤100 μm, Suzhou soil Particle size requirements: 74 μm≤
Grogs footpath≤100, Suzhou μm.
Sinter the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, and calculate subtracting of PM2.5 and PM10
Row's efficiency, the emission reduction efficiency of PM2.5 is 63.8%, and the emission reduction efficiency of PM10 is 54.2%.
Embodiment 6
The substance of the present embodiment is with embodiment 1, its difference: described additive is by activated carbon, coke powder and height
Ridge local soil type becomes, and described additive is formed by following mass percent: activated carbon 90%, coke powder 7%, and Kaolin 3% is described
Kaolin Particle size requirements: 74 μm≤Kaolin particle diameter≤100 μm.
Sinter the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, and calculate subtracting of PM2.5 and PM10
Row's efficiency, the emission reduction efficiency of PM2.5 is 64.2%, and the emission reduction efficiency of PM10 is 51.1%.
Embodiment 7
The substance of the present embodiment is with embodiment 1, its difference: described additive is by activated carbon, coke powder, height
Ridge soil and zeolite form, and described additive is formed by following mass percent: activated carbon 90%, coke powder 7%, Kaolin 2%,
Zeolite 1%.
Sinter the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, and calculate subtracting of PM2.5 and PM10
Row's efficiency, the emission reduction efficiency of PM2.5 is 62.6%, and the emission reduction efficiency of PM10 is 51.7%.
Embodiment 8
The substance of the present embodiment is with embodiment 1, and its difference is:
Reunion liquid shower nozzle 33 place plane is L1 with the horizontal range of collapsible tube 21 arrival end, reunion liquid shower nozzle 33 place plane
Be L2, L2=L1 with the horizontal range of collapsible tube 21 port of export, i.e. reunion liquid shower nozzle 33 place plane and collapsible tube 21 entrance
The horizontal range of end is equal to the horizontal range of reunion liquid shower nozzle 33 place plane with collapsible tube 21 port of export so that flue gas is shrinking
After pipe 21, flue gas flow rate drips mixing with the reunion liquid mist after atomization, contacts during increasing.
Angle between reunion liquid shower nozzle 33 centrage and collapsible tube 21 tube wall is a, a=30 °, at collapsible tube 21 edge airflow
Presenting and collapsible tube 21 tube walls parallel state, when a=30 °, the speed that the reunion liquid mist that reunion liquid shower nozzle 33 sprays into is dripped is v,
Then it is vcos a along the speed of collapsible tube 21 tube wall, increases reunion liquid mist and drips and the collision probability of granule in flue gas；Additionally,
Reunion liquid mist is dripped constantly to collapsible tube 21 central motion so that be also fully contacted with the flue gas of collapsible tube 21 center.Collapsible tube
It is disposed with 8 reunion liquid shower nozzles 33 on 21 cross sections uniformly, promotes that reunion liquid mist is dripped and connect with the flue gas particle in collapsible tube 21
Touch, moistening, adhesion.
The disposed outside of collapsible tube 21 has circulating line 8, circulating line 8 entrance point to be connected with air compressor machine 32 port of export, annular
Being provided with 8 outlets on pipeline 8, and the outlet of circulating line 8 is connected with reunion liquid shower nozzle 33, reunion liquid is by circulating line 8
Flow into reunion liquid shower nozzle 33；8 outlets it are provided with on circulating line 8, can be by uniform and stable for liquid of reuniting from reunion liquid reservoir
Part 31 is transported in reunion liquid shower nozzle 33 so that what reunion liquid shower nozzle 33 was uniform, stable sprays into reunion liquid.
The discharge-reducing method of sintering flue gas PM10 and PM2.5 of the present embodiment:
Step one: preparation reunion liquid
(A) sodium carboxymethyl cellulose 20g, polyacrylamide 20g are weighed by mass parts, by solid particle sodium carboxymethyl cellulose
20g, polyacrylamide 20g mix homogeneously, obtain mixture A；
(B) weigh additive 4g by mass parts, add in mixture A, mix homogeneously, obtain compound agglomerator；
(C) the compound agglomerator in step (B) is mixed with water, and is uniformly mixed, and the quality of agglomerator and water it
Ratio is 1:2000, then adds Ca (OH)2Powder regulation solution PH is 8, prepares reunion liquid；
Step 2: subparticle is reunited
In Ore Sintering Process, reunion liquid is added in reunion liquid reservoir part 31, flue collector 1 is provided with atomization reunion dress
Putting 2, the reunion liquid in reunion liquid reservoir part 31 is transported to reunion liquid shower nozzle 33 through air compressor machine 32, and reunion liquid shower nozzle 33 is at mist
Changing and spray into vaporific reunion liquid in the collapsible tube 21 of agglomeration device 2, the particulate matter in flue gas and reunion liquid are at atomization agglomeration device 2
Reunite contact, moistening, adhesion, nucleation, collide, grow up.Wherein: the mist droplet particle size of the reunion liquid sprayed into is 30-150 μm,
Every cubic metre of straying quatity sintering liquid of reuniting in flue gas is 20ml.
Atomization agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23, and flue gas is entered by collapsible tube 21 arrival end
Entering to be atomized agglomeration device 2, then flowed into expansion pipe 23 by Cylindrical connecting tube 22, the flue gas in flue collector 1 is by collapsible tube 21 entrance
End flows into collapsible tube 21, owing to collapsible tube 21 caliber diminishes rapidly so that the flue gas flow rate in collapsible tube 21 increases rapidly, and group
Poly-liquid shower nozzle 33 sprays into vaporific reunion liquid in the collapsible tube 21 of atomization agglomeration device 2 so that micro-with flue gas of reunion liquid
Fine grained with contact, moistening, adhesion, due to flue gas by Cylindrical connecting tube 22 time speed increase, Cylindrical connecting tube 22 He
Expansion pipe 23 produces low pressure so that is adsorbed with the reunion liquid mist of fine particle and drops in nucleation under low voltage situations, collides, grows up,
The bulky grain aggregate formed.
Step 3: dust arrester traps
Use sack cleaner reunion is grown up formed bulky grain aggregate remove, i.e. utilize sack cleaner, and then make granule
Aggregate is separated from gas, it is achieved the reduction of discharging of subparticle in flue gas.
Additive is formed by following mass percent: activated carbon 70%, coke powder 30%.
Sinter the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, and calculate subtracting of PM2.5 and PM10
Row's efficiency, the emission reduction efficiency of PM2.5 is 60.7%, and the emission reduction efficiency of PM10 is 43.5%.
Embodiment 9
The substance of the present embodiment is with embodiment 1, and its difference is:
Reunion liquid shower nozzle 33 place plane is L1 with the horizontal range of collapsible tube 21 arrival end, reunion liquid shower nozzle 33 place plane
Be L2, L2=0.8L1 with the horizontal range of collapsible tube 21 port of export, i.e. reunion liquid shower nozzle 33 place plane enters with collapsible tube 21
The horizontal range of mouth end is more than the horizontal range of reunion liquid shower nozzle 33 place plane with collapsible tube 21 port of export so that flue gas is being received
After the draw 21, flue gas flow rate drips mixing with the reunion liquid mist after atomization, contacts during increasing.
Angle between reunion liquid shower nozzle 33 centrage and collapsible tube 21 tube wall is a, a=35 °, at collapsible tube 21 edge airflow
Presenting and collapsible tube 21 tube walls parallel state, when a=35 °, the speed that the reunion liquid mist that reunion liquid shower nozzle 33 sprays into is dripped is v,
Then it is vcos a along the speed of collapsible tube 21 tube wall, increases reunion liquid mist and drips and the collision probability of granule in flue gas；Additionally,
Reunion liquid mist is dripped constantly to collapsible tube 21 central motion so that be also fully contacted with the flue gas of collapsible tube 21 center.Collapsible tube
It is disposed with 2 reunion liquid shower nozzles 33 on 21 cross sections uniformly, promotes that reunion liquid mist is dripped and connect with the flue gas particle in collapsible tube 21
Touch, moistening, adhesion.
The disposed outside of collapsible tube 21 has circulating line 8, circulating line 8 entrance point to be connected with air compressor machine 32 port of export, annular
Being provided with 2 outlets on pipeline 8, and the outlet of circulating line 8 is connected with reunion liquid shower nozzle 33, reunion liquid is by circulating line 8
Flow into reunion liquid shower nozzle 33；2 outlets it are provided with on circulating line 8, can be by uniform and stable for liquid of reuniting from reunion liquid reservoir
Part 31 is transported in reunion liquid shower nozzle 33 so that reunion liquid shower nozzle 33 sprays into reunion liquid for uniform, stable.
The discharge-reducing method of sintering flue gas PM10 and PM2.5 of the present embodiment:
Step one: preparation reunion liquid
(A) weighing aluminium polychlorid 20g, sodium carboxymethyl cellulose 40g by mass parts, polyacrylamide 40g, by solid
Grain aluminium polychlorid 20g, sodium carboxymethyl cellulose 40g, polyacrylamide 40g mix homogeneously, obtain mixture A；
(B) weigh additive 5g by mass parts, add in mixture A, mix homogeneously, obtain compound agglomerator；
(C) the compound agglomerator in step (B) is mixed with water, and is uniformly mixed, and the quality of agglomerator and water it
Ratio is 1:10000, then adds Ca (OH)2Powder regulation solution PH is 9, prepares reunion liquid；
Step 2: subparticle is reunited
In Ore Sintering Process, reunion liquid is added in reunion liquid reservoir part 31, flue collector 1 is provided with atomization reunion dress
Putting 2, the reunion liquid in reunion liquid reservoir part 31 is transported to reunion liquid shower nozzle 33 through air compressor machine 32, and reunion liquid shower nozzle 33 is at mist
Changing and spray into vaporific reunion liquid in agglomeration device 2 collapsible tube 21, the particulate matter in flue gas and reunion liquid are at atomization agglomeration device 2
Poly-contact, moistening, adhesion, nucleation, collide, grow up.Wherein: the mist droplet particle size of the reunion liquid sprayed into is 30-150 μm, often
It is 10ml that cubic meter sinters the straying quatity of liquid of reuniting in flue gas.
Atomization agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23, and flue gas is entered by collapsible tube 21 arrival end
Entering to be atomized agglomeration device 2, then flowed into expansion pipe 23 by Cylindrical connecting tube 22, the flue gas in flue collector 1 is by collapsible tube 21 entrance
End flows into collapsible tube 21, owing to collapsible tube 21 caliber diminishes rapidly so that the flue gas flow rate in collapsible tube 21 increases rapidly, and group
Poly-liquid shower nozzle 33 sprays into vaporific reunion liquid in the collapsible tube 21 of atomization agglomeration device 2 so that micro-with flue gas of reunion liquid
Fine grained with contact, moistening, adhesion, due to flue gas by Cylindrical connecting tube 22 time speed increase, Cylindrical connecting tube 22 He
Expansion pipe 23 produces low pressure so that is adsorbed with the reunion liquid mist of fine particle and drops in nucleation under low voltage situations, collides, grows up,
The bulky grain aggregate formed.
Step 3: dust arrester traps
Use sack cleaner reunion is grown up formed bulky grain aggregate remove, i.e. utilize sack cleaner, and then make granule
Aggregate is separated from gas, it is achieved the reduction of discharging of subparticle in flue gas.
Additive is formed by following mass percent: activated carbon 85%, coke powder 15%.
Sinter the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, and calculate subtracting of PM2.5 and PM10
Row's efficiency, the emission reduction efficiency of PM2.5 is 61.9%, and the emission reduction efficiency of PM10 is 52.6%.
Embodiment 10
The substance of the present embodiment is with embodiment 1, and its difference is:
As shown in Figure 5 and Figure 6, collapsible tube 21 is provided with reunion liquid shower nozzle 33, and reunion liquid shower nozzle 33 is arranged in uniformly
On the tangent to periphery of collapsible tube 21 cross section.It is also equipped with reunion liquid shower nozzle 33 on expansion pipe 23, and reunion liquid shower nozzle 33 is equal
On the even tangent to periphery being arranged in expansion pipe 23 cross section.And the reunion liquid shower nozzle 33 on collapsible tube 21 and expansion pipe 23 with
Same reunion liquid reservoir part 31 is connected, and the straying quatity of liquid of reuniting in every cubic metre of sintering flue gas in collapsible tube 21 is 14ml,
In expansion pipe 23, every cubic metre of straying quatity sintering liquid of reuniting in flue gas is 1ml.
The disposed outside of expansion pipe 23 has circulating line 8, circulating line 8 entrance point to be connected with air compressor machine 32 port of export, annular
Being provided with 16 outlets on pipeline 8, and the outlet of circulating line 8 is connected with reunion liquid shower nozzle 33, reunion liquid is by circulating line
8 flow into reunion liquid shower nozzle 33；It is provided with 16 outlets on circulating line 8, uniform and stable for liquid of reuniting can be stored from reunion liquid
Parts 31 are transported in reunion liquid shower nozzle 33 so that what reunion liquid shower nozzle 33 was uniform, stable sprays into reunion liquid.
Above-mentioned reunion liquid shower nozzle 33 is connected with air compressor machine 32 also by pipeline, air compressor machine 32 and reunion liquid reservoir part 31 phase
Even, wherein: reunion liquid reservoir part 31 is used for storing reunion liquid, air compressor machine 32 enters reunion liquid shower nozzle 33 for reunion liquid provides
Power, reunion liquid shower nozzle 33 is used for reunion liquid mist, and sprays into atomization agglomeration device 2.Reunion liquid containing agglomerator is at sky
Under the driving of press 32, by flowing into reunion liquid shower nozzle 33 in reunion liquid reservoir part 31, atomization is reunited by reunion liquid shower nozzle 33
Liquid sprays into atomization agglomeration device 2, and the mist droplet particle size after atomization is 30-150 μm.
Sinter the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, and calculate subtracting of PM2.5 and PM10
Row's efficiency, the emission reduction efficiency of PM2.5 is 67.7%, and the emission reduction efficiency of PM10 is 54.5%.
Its reason is: collapsible tube 21 is provided with reunion liquid shower nozzle 33 on expansion pipe 23.In collapsible tube 21 fine
Grain thing is fully contacted with reunion liquid, is agglomerated liquid mist and drips moistening, adhesion, and forms reunion core；It is also provided with on expansion pipe 23
Having a reunion liquid shower nozzle 33, and spray into after reunion liquid mist drips, reunion liquid mist drips the reunion core moistening formed by fine particle again,
When fine particle and reunion core crash, easily it is agglomerated core and adheres to, and gradually grow up in constantly collision.
Embodiment 11
The substance of the present embodiment is with embodiment 1, and its difference is:
As it is shown in fig. 7, be provided with reunion liquid shower nozzle 33 on collapsible tube 21, and reunion liquid shower nozzle 33 is arranged in collapsible tube uniformly
On the tangent to periphery of 21 cross sections.It is also equipped with reunion liquid shower nozzle 33 on expansion pipe 23, and reunion liquid shower nozzle 33 is arranged uniformly
On the tangent to periphery of expansion pipe 23 cross section.And collapsible tube 21 is respectively arranged with separate reunion liquid on expansion pipe 23
Adding apparatus 3.I.e. reunion liquid shower nozzle on collapsible tube 21 33 forms a team poly-liquid reservoir part 31 with one and air compressor machine 32 is connected,
And expand reunion liquid shower nozzle on pipe 23 33 and form a team poly-liquid reservoir part 31 with another and air compressor machine 32 is connected so that collapsible tube
21 and expansion pipe 23 in can spray into the reunion liquid of variable concentrations and kind.Reunion in the reunion liquid that wherein collapsible tube 21 sprays into
Agent is 1:5000 with the mass ratio of water, and the agglomerator in the reunion liquid that expansion pipe 23 sprays into is 1:10000 with the mass ratio of water,
In collapsible tube 21, every cubic metre of straying quatity sintering liquid of reuniting in flue gas is 14ml, in expansion pipe 23 in every cubic metre of sintering flue gas
The straying quatity of reunion liquid is 0.5ml.The disposed outside of expansion pipe 23 has circulating line 8, circulating line 8 entrance point and air compressor machine
32 ports of export are connected, and circulating line 8 is provided with 16 outlets, and the outlet of circulating line 8 is connected with reunion liquid shower nozzle 33,
Reunion liquid is flowed into reunion liquid shower nozzle 33 by circulating line 8；16 outlets it are provided with on circulating line 8, can be by uniform for reunion liquid
Stable is transported to reunion liquid shower nozzle 33 from reunion liquid reservoir part 31 so that uniform, stable the spraying into of reunion liquid shower nozzle 33
Reunion liquid.
Above-mentioned reunion liquid shower nozzle 33 is connected with air compressor machine 32 also by pipeline, air compressor machine 32 and reunion liquid reservoir part 31 phase
Even, wherein: reunion liquid reservoir part 31 is used for storing reunion liquid, air compressor machine 32 enters reunion liquid shower nozzle 33 for reunion liquid provides
Power, reunion liquid shower nozzle 33 is used for reunion liquid mist, and sprays into atomization agglomeration device 2.Reunion liquid containing agglomerator is at sky
Under the driving of press 32, by flowing into reunion liquid shower nozzle 33 in reunion liquid reservoir part 31, atomization is reunited by reunion liquid shower nozzle 33
Liquid sprays into atomization agglomeration device 2, and the mist droplet particle size after atomization is 30-150 μm.
Sinter the concentration of emission of PM2.5 and PM10 in flue gas after detection dust arrester 4, and calculate subtracting of PM2.5 and PM10
Row's efficiency, the emission reduction efficiency of PM2.5 is 67.3%, and the emission reduction efficiency of PM10 is 54.2%.
Emission reduction efficiency is higher than embodiment 1, and its reason of Analysis on Mechanism is: collapsible tube 21 is provided with reunion on expansion pipe 23
Liquid shower nozzle 33.Fine particle in collapsible tube 21 is fully contacted with reunion liquid, is agglomerated liquid mist and drips moistening, adhesion, and
Form reunion core；Being also equipped with reunion liquid shower nozzle 33 on expansion pipe 23, and spray into after reunion liquid mist drips, reunion liquid mist is dripped again
The reunion core moistening formed by fine particle, when fine particle and reunion core crash, is easily agglomerated core and adheres to,
And gradually grow up in constantly collision.
Additionally, as shown in Figure 8, expansion pipe 23 has on the tangent to periphery of two cross sections and is uniformly arranged reunion liquid shower nozzle 33, i.e.
Expansion pipe 23 is provided with two and forms a team poly-liquid shower nozzle 33, thus realizes classification in expansion pipe 23 and spray into reunion liquid mist and drip, and improves group
The service efficiency of poly-liquid.Reason is: reunion liquid mist is dripped to stick particulate matter and relied primarily on the surface layer that reunion liquid mist is dripped, when
Poly-liquid mist is dripped top layer and is constantly occupied full, when new particulate matter and reunion liquid mist drip collision due to do not reach the liquid level of droplet and can not
Sticked；Reunion liquid classification adds fashionable, and liquid of can reuniting constantly is combined with subparticle so that reunion liquid mist is dripped and is constantly exposed to
Granule top layer, new particulate matter can be fully contacted with reunion liquid mist dropping liquid face, thus improve reunion efficiency.
Embodiment 12
The substance of the present embodiment is with embodiment 1, and its difference is:
Manage interior, in reunion liquid shower nozzle 33 and flue collector 1 as it is shown in figure 9, described reunion liquid shower nozzle 33 is arranged at collapsible tube 21
Airflow direction contrary, i.e. reunion liquid mist is dripped and is sprayed into collapsible tube 21 central part, and reunion liquid shower nozzle 33 by reunion liquid shower nozzle 33
The droplet direction of ejection is contrary with airflow direction in flue collector 1, increases reunion liquid mist and drips and the collision probability of granule in flue gas；
Additionally, reunion liquid mist is dripped constantly to collapsible tube 21 central motion so that be also fully contacted with the flue gas of collapsible tube 21 center.
Schematically being described the present invention and embodiment thereof above, this description does not has restricted, shown in accompanying drawing yet
Simply one of embodiments of the present invention, actual structure is not limited thereto.So, if those of ordinary skill in the art
Enlightened by it, in the case of without departing from the invention objective, design the knot similar to this technical scheme without creative
Structure mode and embodiment, all should belong to protection scope of the present invention.
Claims (10)
1. the emission-reducing system of an Ore Sintering Process fine particle, it is characterised in that: include that fine particle atomization is reunited and fill
Putting (2), reunion liquid adding apparatus (3) and dust arrester (4), pallet (6) bottom is by bellows (7) and flue collector
(1) be connected, convulsion flue gas by pallet (6) bottom in bellows (7) import flue collector (1), on flue collector (1)
Arranging atomization agglomeration device (2), reunion liquid adding apparatus (3) and dust arrester (4), flue gas is flowed into mist by flue collector (1)
Change agglomeration device (2), after removing dust device (4) dedusting, entered chimney by blower fan (5).
The emission-reducing system of a kind of Ore Sintering Process fine particle the most according to claim 1, it is characterised in that: described
Atomization agglomeration device (2) include collapsible tube (21), Cylindrical connecting tube (22) and expansion pipe (23)；
Wherein: collapsible tube (21) is the different conical pipe of two ends internal diameter with expansion pipe (23), described collapsible tube (21) with
One end that flue collector (1) is connected is collapsible tube (21) arrival end, the internal diameter of collapsible tube (21) arrival end and flue collector (1)
Internal diameter identical, collapsible tube (21) near expansion pipe (23) one end be collapsible tube (21) port of export, collapsible tube (21)
The port of export is identical with expansion pipe (23) arrival end internal diameter；Collapsible tube (21) port of export and expansion pipe (23) arrival end are by circle
Column connecting pipe (22) is connected, and one end away from collapsible tube (21) of described expansion pipe (23) is expansion pipe (23) outlet
End, expansion pipe (23) port of export internal diameter is identical with the internal diameter of flue collector (1), and is connected with flue collector (1)；Above-mentioned receipts
The centrage of the draw (21), Cylindrical connecting tube (22) and expansion pipe (23) is on same straight line；Flue gas is by collapsible tube (21)
Arrival end enters atomization agglomeration device (2), then is flowed into expansion pipe (23) by Cylindrical connecting tube (22), expansion pipe (23) go out
Mouth end flows out atomization agglomeration device (2).
The emission-reducing system of a kind of Ore Sintering Process fine particle the most according to claim 1, it is characterised in that: reunite
Liquid adding apparatus (3) includes reunion liquid reservoir part (31), air compressor machine (32) and reunion liquid shower nozzle (33), and reunion liquid stores
Parts (31) are connected with the entrance point of air compressor machine (32) by pipeline, and air compressor machine (32) port of export is by pipeline and reunion liquid
Shower nozzle (33) is connected, and wherein: reunion liquid reservoir part (31) is used for storing reunion liquid, air compressor machine (32) is that reunion liquid enters
The liquid shower nozzle (33) that enters to reunite provides power, and reunion liquid shower nozzle (33) is used for reunion liquid mist, and sprays into atomization agglomeration device
(2)。
The emission-reducing system of a kind of Ore Sintering Process fine particle the most according to claim 3, it is characterised in that: reunite
Liquid shower nozzle (33) is arranged on the tangent to periphery of collapsible tube (21) cross section uniformly.
The emission-reducing system of a kind of Ore Sintering Process fine particle the most according to claim 4, it is characterised in that: reunite
Liquid shower nozzle (33) place plane is L1 with the horizontal range of collapsible tube (21) arrival end, reunion liquid shower nozzle (33) place plane
It is L2, L2=0.5-1.0L1 with the horizontal range of collapsible tube (21) port of export.
The emission-reducing system of a kind of Ore Sintering Process fine particle the most according to claim 5, it is characterised in that: reunite
Angle between liquid shower nozzle (33) centrage and collapsible tube (21) tube wall is a, 30≤a≤45 °.
The emission-reducing system of a kind of Ore Sintering Process fine particle the most according to claim 6, it is characterised in that: shrink
2-16 reunion liquid shower nozzle (33) it is disposed with uniformly on pipe (21) cross section.
8. according to the emission-reducing system of a kind of sintering process fine particle described in claim 3-7 any one, it is characterised in that:
The disposed outside of collapsible tube (21) has circulating line (8), circulating line (8) entrance point to be connected with air compressor machine (32) port of export,
It is provided with 2-16 outlet on circulating line (8), and the outlet of circulating line (8) is connected with reunion liquid shower nozzle (33), group
Poly-liquid is flowed into reunion liquid shower nozzle (33) by circulating line (8).
The emission-reducing system of a kind of Ore Sintering Process fine particle the most according to claim 8, it is characterised in that: described
Expansion pipe (23) on be provided with reunion liquid shower nozzle (33).
10., according to the emission-reducing system of a kind of Ore Sintering Process fine particle described in claim 3-7 any one, it is special
Levy and be: reunion liquid reservoir part (31) is provided with agitating device (9).
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