CN105797531B - A kind of method that agglomeration process inhibits the discharge of Ore Sintering Process fine particle - Google Patents
A kind of method that agglomeration process inhibits the discharge of Ore Sintering Process fine particle Download PDFInfo
- Publication number
- CN105797531B CN105797531B CN201610288689.1A CN201610288689A CN105797531B CN 105797531 B CN105797531 B CN 105797531B CN 201610288689 A CN201610288689 A CN 201610288689A CN 105797531 B CN105797531 B CN 105797531B
- Authority
- CN
- China
- Prior art keywords
- reunion liquid
- fine particle
- reunion
- flue gas
- additive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of methods that agglomeration process inhibits the discharge of Ore Sintering Process fine particle, belong to Ore Sintering Process pollution reduction technical field.Step of the invention are as follows: step 1: preparation reunion liquid, by sodium carboxymethylcellulose, the components such as polyacrylamide and additive are uniformly mixed, and agglomerator is prepared, and are mixed with agglomerator and water to obtain reunion liquid；Step 2: subparticle is reunited, and reunion liquid is sprayed into flue gas, the fine particle in sintering flue gas is reunited under the action of reunion liquid grows up；Step 3: dust-extraction unit trapping, dust-extraction unit trapping remove the fine particle reunited and grown up.The reunion liquid mist drop for be adsorbed with fine particle of the invention is nucleated under low voltage situations, collides, growing up, the bulky grain aggregate of formation, and the fine particle reunited and grown up is removed using dust-extraction unit, completely new emission reduction approach is provided for the emission reduction of Ore Sintering Process fine particle.
Description
Technical field
The present invention relates to Ore Sintering Process pollution reduction technical fields, press down more specifically to a kind of agglomeration process
The method of Ore Sintering Process fine particle discharge processed.
Background technique
Pellet refers to the general name that can enter the particulate matter of human respiratory tract by nose and mouth, is indicated with PM10
(particle of the aerodynamic diameter less than 10 microns in surrounding air).PM2.5 refers to that equivalent aerodynamic is straight in surrounding air
Diameter is less than or equal to 2.5 microns of particulate matter.It can be suspended in the air the long period, and content concn is higher in air, just
It is more serious to represent air pollution.Although PM2.5 is the component that content is seldom in earth atmosphere ingredient, it to air quality and
Visibility etc. has important influence.Compared with thicker Atmospheric particulates, PM2.5 partial size is small, and area is big, and activity is strong, easily subsidiary
Poisonous and harmful substances (for example, heavy metal, microorganism etc.), and residence time length, conveying distance in an atmosphere is remote thus right
The influence of human health and atmosphere quality is bigger, moreover, it is able to enter human body alveolar even blood circulation system, directly
Lead to the diseases such as cardiovascular disease.Current oneself warp of pellet pollution becomes atmospheric environment problem outstanding, causes the world each
The great attention of state.It has serious harm to human health, and atmospheric visibility reduction, acid deposition, global climate is caused to become
An important factor for great environmental problems such as change, photochemical fog.The air quality standard of the U.S., European Union, Britain etc. is successively right
Middle PM2.5 is clearly required；2 months 2012, Environment Protect in China portion promulgated new " ambient air quality "
(GB3095-2012), it is additionally arranged PM2.5 mean concentration limit value.
Steel and iron industry is both key pillars of the national economy industry and energy consumption and heavy polluter.China's crude steel year at present
Yield alreadys exceed 800,000,000 tons, close to the 50% of whole world yield.According to " Chinese environmental counts annual report within 2012 ", ferrous metal smelting
Refining and calendering processing industry cigarette (powder) dirt discharge amount are 181.3 ten thousand t, account for the 18.9% of focal investigation industrial enterprise discharge amount, are located at
Third position.The source resolution of PM10 (particulate matters of partial size≤10 μm) and PM2.5 (particulate matters of partial size≤2.5 μm) show steel
Metallurgical industry has become one of the main source of PM10 and PM2.5 in China's atmosphere.Sintering process is modern steel production stream
Essential link in journey, but be the maximum PM10 and PM2.5 emission source of steel and iron industry, account for its total release 40% is left
It is right[1-3].Since agglomeration for iron mine is exhausting process and smoke moisture is big, sintering plant is mainly purified using electric precipitator silently at present
Particulate matter in sintering flue gas, electric precipitator is preferable to the coarseparticulate removal effect in flue gas silently, but partial size is less than
10 μm of fine particle, since its specific resistance is high, charge capacity is poor, efficiency of dust collection is significantly reduced.Sintering flue gas passes through electrostatic
After dedusting, 90% or more particulate matter is PM10 in flue gas, and 80% or more particulate matter is PM2.5[4]。
Sintering flue gas is that air passes through sinter bed during down draft sintering, is become by the physical chemistry of a series of complex
Change formation.Due to being influenced by factors such as material condition, mix material proportioning, technological parameters, so that the chemistry of sintering flue gas
Complicated component is changeable, and flue gas flow, temperature and the fluctuation of each pollutant concentration are very big.It is summed up, sintering flue gas has following typical case
The characteristics of[5-7]:
(1) sintering process air leak rate of air curtain is up to 40-50%, so that generation exhaust gas volumn is very big, produces 1t sinter energy according to statistics
Generate 4000-6000m3Exhaust gas volumn；And exhaust gas volumn changes according to the difference of material composition, technological parameter, so that cigarette
Tolerance fluctuation is larger；
(2) flue-gas temperature fluctuation range is big, changes with process conditions, fuel ratio, flue-gas temperature exists: 80-160
DEG C fluctuation；
(3) humidity of flue gas is larger, and moisture content is 10% or so.Need to be added suitable moisture during sintered mix
It mixed, pelletized, to guarantee the gas permeability of the bed of material；
(4) big containing Dust Capacity in flue gas, wherein including a large amount of fine particles, sinter per ton generates the powder of 20-40kg
Dirt；
(5) smoke components are complicated, and it includes multiple pollutants, such as: fine particle, SO2, COx, NOx, HCl, HF and two
Dislike English class etc..
Just because of sintering flue gas complicated component, flow is big and pollutant concentration is low the features such as, although sintering flue gas is adopted
The cleaner of higher purification efficiency is taken, but unsatisfactory to the removal effect of fine particle.
In sintering flue gas fine particle due to large specific surface area, surface-active it is strong, can be enriched with sintering process generation alkali
The venomous injurants such as metal (K, Na), heavy metal (Hg, Pb, Cr, Cu, Cd, As) and organic pollutant (VOCs, PCDD/Fs)
Matter[8], there is strong carcinogenic, mutagenesis and teratogenesis, be discharged into the aerosol of atmosphere formation, be to induce haze, acid rain, ozone
The key factor of damage layer etc., pollution problem are directly related to national living environment and life quality.Realize sintering process
Fine particle emission reduction it is extremely urgent.
Through retrieving, about the emission-reduction technology scheme of flue gas fine particulate matter.Such as: the title of innovation and creation: industry kiln
Kiln gas PM2.5Dust and heavy metal administer removal device[9], (China Patent No.: ZL201220721358.X, the applying date:
2012-12-24), by the way that filter bag is arranged on flue gas access, and by bag cage inside filter bag, to flue gas PM2.5Dust is subtracted
Row；The technology has preferably with regard to emission reduction effect the pollutant of bulky grain, but the PM in flue gas2.5Emission reduction effect it is limited.
In addition, the title of innovation and creation are as follows: 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 solutions can realize a variety of pollutions in sintering flue gas
The collaboration emission reduction of object, although the discharge of large dust particle in flue gas can be reduced；But to the fine particle in sintering flue gas
Emission reduction effect it is extremely limited.Sintering flue gas compares other exhaust gas in addition, has the spies such as complicated component, flue gas flow be huge
Property, it is come out so that the effective emission-reduction technology for being suitable for sintering flue gas fine particle is also untapped.Urgent need is sought
Emission reduction approach, realize the emission reduction of the subparticle of sintering process.
Bibliography:
[1] Lv Yan brief talks China's steel industry pollution situation and the cleaning life of control measure [C] .2014 Jing-jin-ji region steel industry
Produce environmental protection exchanging meeting .2014,95-96.
[2] sternly to the macro Baoshan District of Shanghai atmosphere fine grained aerosol PM2.5 properties study and the Shanghai source resolution [D]: China
Eastern Polytechnics, 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 iron and steel enterprise typical production process granular material discharged characteristic research [D] Southwest University, 2009,24-
28.
[5] Shen Xiaolin, Liu Daoqing, Lin Yu wait the research and development of Baosteel Sitnering Plant flue gas desulfurization technique and apply [J] Baosteel skill
Art, 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 wait comparison [J] sintered balls of sintering flue gas combined desulfurization and denitrification process
Group, 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 Co., Ltd industrial furnace smoke PM2.5 dust and heavy metal administer removal dress
It sets: China, ZL201220721358.X [P] .2013-09-11.
[10] a kind of method of agglomeration for iron mine flue gas stages cycle of Central South University: China, ZL201310443223.0 [P]
.2014-01-08.
[11] Iron and Steel Research Geueral Institute, steel grind a kind of method of agglomeration for iron mine energy-saving and emission-reduction of bright Chinese workers' journey Technology Co., Ltd.:
China, ZL201510137762.0 [P] .2015-07-01.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome in the prior art, Ore Sintering Process is the primary discharge source of fine particle
Head, existing discharge-reducing method are difficult to effectively deviate from the deficiency of the fine particle in sintering flue gas, provide and a kind of agglomeration process presses down
The method of Ore Sintering Process fine particle discharge processed, realizes effective removing of sintering process fine particle.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
The method that a kind of agglomeration process of the invention inhibits the discharge of Ore Sintering Process fine particle, specific step are as follows:
Step 1: preparation reunion liquid, by sodium carboxymethylcellulose, polyacrylamide and additive are uniformly mixed, and are prepared into
To agglomerator, it is mixed with agglomerator and water to obtain reunion liquid；
Step 2: subparticle is reunited, and reunion liquid is sprayed into flue gas, the fine particle in sintering flue gas is in reunion liquid
Under the action of reunite and grow up；
Step 3: dust-extraction unit trapping, dust-extraction unit trapping remove the fine particle reunited and grown up.
Further, agglomerator includes aluminium polychloride, sodium carboxymethylcellulose, polyacrylamide and additive.
Further, agglomerator each component is formed according to following mass parts:
Further, step 1: the specific steps of preparation reunion liquid are as follows:
(A) 0-20 parts of aluminium polychloride are weighed by mass parts, 20-40 parts of sodium carboxymethylcellulose, polyacrylamide 20-40
Part, by 0-20 parts of aluminium polychloride, 20-40 parts of sodium carboxymethylcellulose, 20-40 parts of polyacrylamide are uniformly mixed, and must be mixed
Object A；
(B) 2-5 parts of additive are weighed by mass parts, be added in mixture A, be uniformly mixed, obtain compound agglomerator；
(C) the compound agglomerator in step (B) is mixed with water, and be uniformly mixed, and the quality of agglomerator and water
The ratio between be 1:2000-10000, reunion liquid is prepared.
Further, Ca (OH) is added in reunion liquid2Powder, the pH value for adjusting reunion liquid is 8-9.
Further, the additive is made of active carbon and coke powder, and additive presses following mass percentage composition:
Active carbon 70-90%, coke powder 10-30%.
Further, activated carbon particle size requirement: 74 μm≤activated carbon particle size≤100 μm, coke powder Particle size requirements:
74 μm≤coke powder partial size≤100 μm.
Further, step 2: the specific steps that subparticle is reunited are as follows:
The exhaust gases passes are the flue collector 1 of sintering flue gas, atomization agglomeration device 2 are equipped on flue collector 1, in mist
Change and spray into misty reunion liquid mist drop in agglomeration device 2, the fine particle and reunion liquid in flue gas are in atomization agglomeration device 2
It is polymerized to core, collision is grown up.
Further, the mist droplet particle size of the reunion liquid of penetrating is 30-150 μm, liquid of reuniting in every cubic metre of sintering flue gas
Straying quatity be 10-20ml.
Further, atomization agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23.
3. beneficial effect
Using technical solution provided by the invention, compared with existing well-known technique, there is following remarkable result:
A small amount of additive is added in proposing for the invention in agglomerator, significantly improves the reunion effect of reunion liquid
Rate accelerates the reunion speed of particulate matter, and the subparticle of high speed to eliminate the process of fine particle adherency forming core
Object is difficult to penetrate reunion liquid mist drop, improves effective collision probability.
Since the solid additives such as active carbon and coke have suction-operated to fine particle, when fine particle and reunite
It after liquid mist drop collision enters reunion liquid, can be attracted on active carbon and coke, so that the liquid level exposure on reunion liquid mist drop surface layer
Out, new particulate matter can come into full contact with reunion liquid mist dropping liquid face, to improve agglomeration efficiency.It is added to a small amount of addition
Agent allows for PM10 and PM2.5 emission reduction efficiency and significantly improves, and PM10 emission reduction efficiency has reached 65.9%, PM2.5 emission reduction efficiency and reached
To 53.6%, significant emission reduction effect is achieved.Moreover, while emission reduction fine particle, SO in sintering flue gas2、NOX
Concentration of emission be significantly reduced, realize the Collaborative Control of multiple pollutant.
Detailed description of the invention
Fig. 1 is the overall structure diagram of embodiment 1-9；
Fig. 2 is the arragement construction schematic diagram of the reunion liquid spray head of the collapsible tube of embodiment 1-9；
Fig. 3 is the sintering machine and emission-reducing system schematic diagram of embodiment 1-9；
The positional diagram of reunion liquid spray head and contraction tube wall that Fig. 4 is embodiment 1-9；
Fig. 5 is the overall structure diagram of embodiment 10；
Fig. 6 is the arragement construction schematic diagram of the reunion liquid spray head of the expansion pipe of embodiment 10；
Fig. 7 is the overall structure diagram of embodiment 11；
Fig. 8 is that two groups of reunion liquid spray heads are arranged in the expansion pipe of embodiment 11；
Fig. 9 is that 12 reunion liquid spray head of embodiment is set to the structural schematic diagram in collapsible tube；
Figure 10 is the flow chart of fine particle discharge-reducing method of the present invention；
Figure 11 is the flow chart of reunion liquid and preparation method thereof of the present invention.
Label declaration in schematic diagram:
1, flue collector；2, it is atomized agglomeration device；21, collapsible tube；22, Cylindrical connecting tube；23, expansion pipe；3, reunion liquid adds
Enter device；31, reunion liquid reservoir part；32, air compressor machine；33, reunion liquid spray head；4, dust-extraction unit；5, blower；6, it is sintered platform
Vehicle；7, bellows；8, circulating line；9, agitating device.
Specific embodiment
To further appreciate that the contents of the present invention, the present invention will be further described with reference to the examples below.
Embodiment 1
In conjunction with shown in Figure 10 and Figure 11, the present embodiment is sintered a kind of agglomeration process inhibition Ore Sintering Process fine particle row
The method put: specific emission reduction step are as follows:
Step 1: preparation reunion liquid
(A) aluminium polychloride 10g, sodium carboxymethylcellulose 30g, polyacrylamide 30g are weighed by mass parts, by solid
Grain aluminium polychloride 10g, sodium carboxymethylcellulose 30g, polyacrylamide 30g are uniformly mixed, obtain mixture A；
(B) additive 2g is weighed by mass parts, the additive is solid additive, is added in mixture A, mixing is equal
It is even, obtain compound agglomerator；
(C) the compound agglomerator in step (B) is mixed with water, and be uniformly mixed, and the quality of agglomerator and water
The ratio between be 1:5000, then be added Ca (OH)2It is 8.5 that powder, which adjusts solution PH, and reunion liquid is prepared；
Step 2: subparticle is reunited
In Ore Sintering Process, reunion liquid is added in reunion liquid reservoir part 31, atomization group is installed on flue collector 1
Poly- device 2, the reunion liquid in reunion liquid reservoir part 31 are transported to reunion liquid spray head 33 through air compressor machine 32, and reunion liquid spray head 33 exists
It is atomized in the collapsible tube 21 of agglomeration device 2 and sprays into misty reunion liquid, the particulate matter and reunion liquid in flue gas are in atomization reunion dress
2 reunions are set to contact, soak, adhere to, be nucleated, collide, grow up.Wherein: the mist droplet particle size of the reunion liquid of penetrating is 30-150 μm, often
The straying quatity of reunion liquid is 15ml in cubic meter sintering flue gas.
Being atomized agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23, and flue gas is by 21 arrival end of collapsible tube
Expansion pipe 23 is flowed into atomization agglomeration device 2, then by Cylindrical connecting tube 22, the flue gas in flue collector 1 is by 21 entrance of collapsible tube
End flows into collapsible tube 21, since 21 caliber of collapsible tube becomes smaller rapidly, so that the flue gas flow rate in collapsible tube 21 increases rapidly, reunites
Liquid spray head 33 sprays into misty reunion liquid in the collapsible tube 21 of atomization agglomeration device 2 so that reunion liquid with it is fine in flue gas
Particle and contact, wetting, adherency, since speed increases when flue gas passes through Cylindrical connecting tube 22, in Cylindrical connecting tube 22 and expansion
Pipe 23 generates low pressure, so that the reunion liquid mist drop for being adsorbed with fine particle is nucleated under low voltage situations, collides, growing up, is formed
Bulky grain aggregate.
Step 3: dust-extraction unit trapping
It will be reunited the bulky grain aggregate to be formed removal of growing up using electrostatic precipitator, i.e., using strong in electrostatic precipitator
Electric field makes gas ionization, i.e. generation corona discharge, and then separates particle cluster from gas, to inhibit fine
The discharge of grain object, realizes the emission reduction of subparticle in flue gas.
In Ore Sintering Process, reunion liquid, the subparticle in sintering flue gas are sprayed into the exhaust gases passes of sintering flue gas
Object is reunited under the action of reunion liquid grows up, and the fine particle reunited and grown up is removed using dust-extraction unit 4.
The compound agglomerator of flue gas fine particulate matter emission reduction, each component are formed according to following quality: aluminium polychloride 10g, carboxylic
Sodium carboxymethylcellulose pyce 30g, polyacrylamide 30g, additive 2g.Its additive is solid additive, and the additive is by living
Property charcoal and coke powder composition, the additive press following mass percentage composition: active carbon 90%, coke powder 10%, the work
Property charcoal Particle size requirements: 74 μm≤activated carbon particle size≤100 μm, coke powder Particle size requirements: 74 μm≤coke powder partial size≤100 μm.
The exhaust gases passes are the flue collector 1 of sintering flue gas, atomization agglomeration device 2 are equipped on flue collector 1, in mist
Change and spray into misty reunion liquid mist drop in agglomeration device 2, the fine particle and reunion liquid in flue gas are in atomization agglomeration device 2
It is polymerized to core, collision is grown up.
Detect the concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4, record such as table 1.Detect dust-extraction unit
SO in sintering flue gas after 42、NOXConcentration of emission, record is such as table 2.
Comparative example 1
This comparative example be as reference test, the basic process of this comparative example with embodiment 1, the difference is that: main cigarette
It is fitted without atomization agglomeration device 2 on road, reunion liquid is also sprayed into not in flue collector 1, detects sintering flue gas after dust-extraction unit 4
The concentration of emission of middle PM2.5 and PM10, record such as table 1.SO in sintering flue gas after detection dust-extraction unit 42、NOXConcentration of emission,
Record such as table 2.
Comparative example 2
The emission reduction process of this comparative example with embodiment 1, the difference is that: atomization agglomeration device is fitted without on flue collector
2, but reunion liquid is sprayed into flue collector 1, agglomerator is only by aluminium polychloride, sodium carboxymethylcellulose and polyacrylamide group
At being free of solid additive in agglomerator, detect the concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4, record
Such as table 1.
Comparative example 3
The emission reduction process of this comparative example is the same as embodiment 1, the matter of aluminium polychloride, sodium carboxymethylcellulose and polyacrylamide
Measure percentage composition it is same as Example 1, the difference is that: agglomerator only by aluminium polychloride, sodium carboxymethylcellulose and
Polyacrylamide forms, and solid additive is free of in agglomerator, PM2.5 and PM10 in sintering flue gas after detection dust-extraction unit 4
Concentration of emission, record such as table 1.
Experiment is defined as PM10 in flue gas (PM2.5) warp with the agglomerating effect of agglomeration efficiency evaluation PM10 (PM2.5)
Cross the percentage of its concentration reduction after reuniting, it may be assumed that
η=(1-N1/N0) × 100%
Wherein N0 is PM10 (PM2.5) concentration (mg/m in initial flue gas3), N1 is PM10 (PM2.5) in flue gas after reunion
Concentration (mg/m3)。
PM10, PM2.5 concentration of emission in the flue gas of 1 sintering test of table
| 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) by comparative example 1, comparative example 2, comparative example 3 and the comparison of embodiment 1 it is found that no matter reuniting liquid in which way
It is added in flue gas, the discharge of the fine particle in flue gas can be reduced.
(2) comparative example 2 compares comparative example 1, and PM10 emission reduction efficiency is that 27.0%, PM2.5 emission reduction efficiency is 15.9%, fine
The emission reduction efficiency of particulate matter is poor, and reason is that sintering process flue gas flow is big, and reunion liquid is added using general mode, makes
It obtains reunion liquid to be difficult to come into full contact with the particulate matter in flue gas, soak, it is also difficult to realize that the forming core of particulate matter is grown up, burn in addition
It is complicated to tie smoke components, flue gas flow and ingredient fluctuation are big, so that the emission reduction effect of fine particle is very limited.
(3) it is 30.4% that the PM10 emission reduction efficiency of comparative example 3, which is 45.2%, PM2.5 emission reduction efficiency, compares comparative example 2,
PM10 and PM2.5 emission reduction efficiency is significantly increased, and atomization agglomeration device 2 significantly improves the agglomeration efficiency of reunion liquid.Mechanism
Analyze its reason to be: atomization agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23, and flue gas is by collapsible tube
21 arrival ends enter atomization agglomeration device 2, since 21 caliber of collapsible tube becomes smaller rapidly, so that the flue gas flow rate in collapsible tube 21 is fast
Speed increases, and reunion liquid spray head 33 sprays into misty reunion liquid in the collapsible tube 21 of atomization agglomeration device 2, so that reunion liquid and cigarette
Subparticle and contact in gas, wetting, adherency are connected since speed increases when flue gas passes through Cylindrical connecting tube 22 in cylinder
Pipe 22 and expansion pipe 23 generate low pressure so that be adsorbed with fine particle reunion liquid mist drip under low voltage situations be nucleated, collide,
It grows up, the bulky grain aggregate of formation.Using electrostatic precipitator will reunite grow up to be formed bulky grain aggregate removal so that cigarette
The concentration of emission of fine particle significantly reduces in gas.
It needs to clearly state herein, existing researcher generally believes that Venturi tube imitates the emission reduction of fine particle
Fruit is poor, and since the drag losses of Venturi tube are larger, and Venturi tube is made to be applied to grinding for sintering flue gas fine particle emission reduction
Study carefully and be rarely reported, the applicant using Venturi effect devise atomization agglomeration device 2 so that in flue gas fine particle row
Put concentration significant decrease.The technology prejudice of the prior art is broken.
(4) comparative example 3 is compared, the PM10 emission reduction efficiency of embodiment 1 has reached 65.9%, PM2.5 emission reduction efficiency and has been
53.6%, the solid additive in agglomerator significantly improves the agglomeration efficiency of reunion liquid, will be reunited using electrostatic precipitator and is grown
The bulky grain aggregate removal formed greatly, so that the concentration of emission of fine particle significantly reduces in flue gas, this makes applicant
It is very surprised；But its kinetic collision, adhesive mechanism are still not clear.Its reaction mechanism is discussed by seminar for several times, and is recognized
May be for its reason:
1) speed increases when flue gas passes through Cylindrical connecting tube 22, environment under low pressure is formed, so that reunion liquid is under low voltage situations
It collides, grow up with fine particle, when including solid additive in reunion liquid mist drop, so that solid additive is in reunion liquid
A stable forming core parent is formed inside droplet, after fine particle is contacted with reunion liquid droplet surface, what is directly formed is big
Particle cluster eliminates the process of fine particle adherency forming core, to accelerate the reunion speed of particulate matter.
2) fine particle reunites and mainly contacts with fine particle by reunion liquid mist drop, collides and grow up, still
Flue gas flow rate in collapsible tube 21 increases rapidly, although improving the probability of reunion liquid mist drop with fine particle collision,
It is during contact-impact, to there is fine of part since the speed of fine particle in flue gas and reunion liquid mist drop is larger
Grain object is directed through reunion liquid mist drop, so that reunion liquid is difficult to effectively adsorb fine particle, forms a large amount of invalid collisions；The group of working as
When including solid additive in poly- liquid mist drop, the fine particle of high speed is difficult to penetrate reunion liquid mist drop, improves and effectively touches
Hit probability.
3) after fine particle and the drop collision of reunion liquid mist enter reunion liquid, due to by the stickiness in reunion liquid mist drop
The influence of resistance, fine particle can rest on reunion liquid mist drop surface layer again, without inside reunion liquid mist drop；And reunite
Liquid mist, which is dripped, sticks the superficial layer for relying primarily on reunion liquid mist and dripping to particulate matter, drips surface layer when poly- liquid mist and is constantly occupied full, new
Particulate matter is dripped with reunion liquid mist cannot be sticked when colliding due to not reaching the liquid level of droplet；When reunion liquid mist drop in include
When having solid additive, since solid additive has porous structure, there is suction-operated to fine particle, work as fine particle
It after entering reunion liquid with the drop collision of reunion liquid mist, can be attracted on active carbon and coke, so that the liquid on reunion liquid mist drop surface layer
Face is exposed, and new particulate matter can come into full contact with reunion liquid mist dropping liquid face, to improve agglomeration efficiency.
Atomization agglomeration device 2 of the invention includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23, and flue gas is by collapsible tube
21 arrival ends enter atomization agglomeration device 2, then flow into expansion pipe 23 by Cylindrical connecting tube 22, and the flue gas in flue collector 1 is by shrinking
21 arrival end of pipe flows into collapsible tube 21, since 21 caliber of collapsible tube becomes smaller rapidly, so that the flue gas flow rate in collapsible tube 21 is rapid
Increase, reunion liquid spray head 33 sprays into misty reunion liquid in the collapsible tube 21 of atomization agglomeration device 2, so that reunion liquid and flue gas
In subparticle and contact, wetting, adherency, due to flue gas pass through Cylindrical connecting tube 22 when speed increase, in Cylindrical connecting tube
22 generate low pressure with pipe 23 is expanded, so that the reunion liquid mist for being adsorbed with fine particle drips nucleation, collision, length under low voltage situations
Greatly, the bulky grain aggregate of formation.And the fine particle reunited and grown up is removed using dust-extraction unit, realize fine particle
Efficient emission-reducing, provide completely new emission reduction approach for the emission reduction of Ore Sintering Process fine particle.
A small amount of additive is added in proposing for the invention in agglomerator, significantly improves the reunion effect of reunion liquid
Rate accelerates the reunion speed of particulate matter, and the subparticle of high speed to eliminate the process of fine particle adherency forming core
Object is difficult to penetrate reunion liquid mist drop, improves effective collision probability.
Since active carbon and coke have porous structure, there is suction-operated to fine particle, when fine particle and group
It after poly- liquid mist drop collision enters reunion liquid, can be attracted on active carbon and coke, so that the liquid level on reunion liquid mist drop surface layer is sudden and violent
Expose, new particulate matter can come into full contact with reunion liquid mist dropping liquid face, to improve agglomeration efficiency.It is added to a small amount of add
Add agent, allows for PM10 and PM2.5 emission reduction efficiency and significantly improve, PM10 emission reduction efficiency has reached 65.9%, PM2.5 emission reduction efficiency
Reach 53.6%, has achieved significant emission reduction effect.
SO2、NOXEmission reduction efficiency calculated using following formula:
Wherein C0 is PM10 (PM2.5) concentration (mg/m in initial flue gas3), C1 is PM10 (PM2.5) in flue gas after reunion
Concentration (mg/m3)。
SO in the flue gas of 2 sintering test of table2、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 agglomerator of the invention, in flue gas2Concentration of emission by 659mg/m3Drop to
378mg/m3, NOXConcentration of emission by 322mg/m3Drop to 256mg/m3, not only there is suction-operated to fine particle, it is also right
SO in flue gas2, NOx, dioxin has suction-operated, to realize the Collaborative Control of multiple pollutant.Its reason is: spray
Include that active carbon and coke have porous structure in the reunion agent solution entered, not only has suction-operated to fine particle, also
To the SO in flue gas2, NOx, dioxin has suction-operated, and Ca (OH) is added in reunion liquid2Powder can adsorb in flue gas
SO2, the sour gas such as NOx；And promote fine particle to drip with reunion liquid mist and contact, soak, adhering to, to improve reunion effect
Rate.
In conjunction with shown in Fig. 1,2,3 and 4, the emission-reducing system of this method application, including fine particle are atomized agglomeration device
2, reunion liquid adding apparatus 3 and dust-extraction unit 4, sinter mixture mixed, pelletized after by distribution device, dress is layered on sintering sintering
On trolley 6, sinter mixture carries out down draft sintering after lighting a fire, and sintering flue gas passes through sinter bed, and 6 bottom of pallet passes through
Bellows 7 are connected with flue collector 1, and exhausting flue gas is imported in flue collector 1 by 6 bottom of pallet through bellows 7, are arranged on flue collector 1
It is atomized agglomeration device 2, reunion liquid adding apparatus 3 and dust-extraction unit 4, flue gas flows into atomization agglomeration device 2 by flue collector 1, through removing
Chimney is discharged by blower 5 after 4 dedusting of dirt device；Fine particle in flue gas is reunited forming core in atomization agglomeration device 2, nucleation
It grows up, and removes the fine particle reunited and grown up in the dust-extraction unit at rear portion 4.
Above-mentioned atomization agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23；Wherein: collapsible tube 21
With expansion pipe 23 conical pipe that be both ends internal diameter different, one end that the collapsible tube 21 is connected with flue collector 1 is collapsible tube 21
The internal diameter of arrival end, 21 arrival end of collapsible tube is identical as the internal diameter of flue collector 1, and collapsible tube 21 is to receive close to one end of expansion pipe 23
21 outlet end of the draw, 21 outlet end of collapsible tube are identical as expansion 23 arrival end internal diameter of pipe；21 outlet end of collapsible tube and expansion pipe 23
Arrival end is connected by Cylindrical connecting tube 22, and the one end of the expansion pipe 23 far from collapsible tube 21 is expansion 23 outlet end of pipe,
It is identical as the internal diameter of flue collector 1 to expand 23 outlet end internal diameter of pipe, and is connected with flue collector 1；Above-mentioned collapsible tube 21, cylinder connection
The center line of pipe 22 and expansion pipe 23 is on same straight line；Flue gas enters atomization agglomeration device 2 by 21 arrival end of collapsible tube, then
Expansion pipe 23 is flowed by Cylindrical connecting tube 22, and atomization agglomeration device 2 is flowed out by 23 outlet end of expansion pipe.Cigarette in flue collector 1
Gas flows into collapsible tube 21 by 21 arrival end of collapsible tube, since 21 caliber of collapsible tube becomes smaller rapidly, so that the flue gas in collapsible tube 21
Flow velocity increases rapidly, and speed increases when flue gas passes through Cylindrical connecting tube 22, low pressure is generated in its vicinity, so that the particle in flue gas
Object collision is more violent.
The reunion liquid adding apparatus 3 includes reunion liquid reservoir part 31, air compressor machine 32 and reunion liquid spray head 33, wherein
It is provided with agitating device 9 in reunion liquid reservoir part 31, so that the reunion liquid uniform component in reunion liquid reservoir part 31 is stablized,
Prevent the reunion liquid being made into from component segregation occurs, to influence the emission reduction effect of fine particle.Reunion liquid reservoir part 31 is logical
Piping is connected with the input end of air compressor machine 32, and 32 outlet end of air compressor machine is connected by pipeline with reunion liquid spray head 33, in which: group
Poly- liquid reservoir part 31 enters reunion liquid spray head 33 for reunion liquid and provides power, reunion liquid for storing reunion liquid, air compressor machine 32
Spray head 33 is used for reunion liquid mist, and sprays into atomization agglomeration device 2, and the reunion liquid spray head 33 is arranged in collapsible tube 21
On.Reunion liquid containing agglomerator is under the driving of air compressor machine 32, by flowing into reunion liquid spray head 33 in reunion liquid reservoir part 31,
Reunion liquid spray head 33 will be atomized reunion liquid and spray into atomization agglomeration device 2, and the mist droplet particle size after atomization is 30-150 μm；Atomization is reunited
21 caliber of collapsible tube of device 2 becomes smaller rapidly, so that speed increases when flue gas passes through Cylindrical connecting tube 22, generates in its vicinity low
Pressure, so that reunion liquid generates suction-operated to subparticle, the particulate matter in flue gas and the reunion liquid after atomization are sufficiently connect
Touching, wetting, adherency, nucleation, collision of constantly reuniting grow up, grow up so that subparticle is constantly reunited.
Reunion liquid spray head 33 is uniformly arranged on the tangent to periphery of 21 cross section of collapsible tube, the flue gas stream in collapsible tube 21
Fast constantly to increase, the reunion liquid mist drop after reunion liquid spray head 33 is atomized can sufficiently, uniformly mix in collapsible tube 21 with flue gas；It should
Cross section is the vertical section perpendicular to the center line of collapsible tube 21,33 place plane of reunion liquid spray head and 21 arrival end of collapsible tube
Horizontal distance be L1, the horizontal distance of 33 place plane of reunion liquid spray head and 21 outlet end of collapsible tube is L2, L2=0.5L1,
I.e. the horizontal distance of 33 place plane of reunion liquid spray head and 21 arrival end of collapsible tube is greater than 33 place plane of reunion liquid spray head and receives
The horizontal distance of 21 outlet end of the draw so that flue gas enter collapsible tube 21 after, flue gas flow rate increase during and after atomization
Reunion liquid mist drop mixing, contact.
Angle between 33 center line of reunion liquid spray head and 21 tube wall of collapsible tube is a, a=45 °, in 21 edge gas of collapsible tube
Stream presents and 21 tube walls parallel state of collapsible tube, when a=45 °, if the speed for the reunion liquid mist drop that reunion liquid spray head 33 sprays into
For v, then it is vcos a along the speed of 21 tube wall of collapsible tube, increases the collision probability of reunion liquid mist drop and particle in flue gas；
In addition, reunion liquid mist is dripped constantly to 21 center movement of collapsible tube, so that also coming into full contact with the flue gas at 21 center of collapsible tube.It receives
It is uniformly disposed with 16 reunion liquid spray heads 33 on 21 cross section of the draw, promotes reunion liquid mist drop and fine in collapsible tube 21
The contact of grain object, wetting, adherency.
The disposed outside of collapsible tube 21 has circulating line 8, and 8 input end of circulating line is connected with 32 outlet end of air compressor machine, ring
16 outlets are provided on shape pipeline 8, and the outlet of circulating line 8 is connected with reunion liquid spray head 33, reunion liquid is by circulating line 8
Flow into reunion liquid spray head 33；16 outlets are provided on circulating line 8, the liquid that can will reunite is uniform and stable from reunion liquid storage unit
Part 31 is transported in reunion liquid spray head 33, so that the uniform and stable penetrating reunion liquid of reunion liquid spray head 33.
The dust-extraction unit 4 is electrostatic precipitator, and the fine particle in flue gas is in atomization agglomeration device 2 and reunion liquid
Burning can be realized in droplet wetting, adherency, further forming core, after growing up, the particulate matter removal after being grown up by electrostatic precipitator
The reunion emission reduction of knot process fine particle.
Embodiment 2
The basic content of the present embodiment with embodiment 1, the difference is that: the additive is by active carbon and zeolite
Composition, additive press following mass percentage composition: active carbon 85%, zeolite 15%, the activated carbon particle size requirement: 74 μm
≤ activated carbon particle size≤100 μm, sized zeolite particles requirement: 74 μm≤sized zeolite particles≤100 μm.
The concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4 is detected, and calculates subtracting for PM2.5 and PM10
Efficiency is arranged, the emission reduction efficiency that the emission reduction efficiency of PM2.5 is 56.4%, PM10 is 49.0%.
Embodiment 3
The basic content of the present embodiment with embodiment 1, the difference is that: the additive is by active carbon and zeolite
Composition, additive press following mass percentage composition: active carbon 95%, zeolite 5%.
The concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4 is detected, and calculates subtracting for PM2.5 and PM10
Efficiency is arranged, the emission reduction efficiency that the emission reduction efficiency of PM2.5 is 60.2%, PM10 is 48.8%.
Embodiment 4
The basic content of the present embodiment with embodiment 1, the difference is that: the additive is by active carbon and zeolite
Composition, additive press following mass percentage composition: active carbon 90%, zeolite 10%.
The concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4 is detected, and calculates subtracting for PM2.5 and PM10
Efficiency is arranged, the emission reduction efficiency that the emission reduction efficiency of PM2.5 is 55.9%, PM10 is 48.6%.
Embodiment 5
The basic content of the present embodiment with embodiment 1, the difference is that: the additive by active carbon, coke powder,
Bentonite and Suzhou soil composition, the additive press following mass percentage composition: active carbon 90%, coke powder 8%, bentonite
1%, Suzhou soil 1%, the bentonite Particle size requirements: 74 μm≤bentonite partial size≤100 μm, Suzhou soil Particle size requirements: 74 μm
≤ Suzhou soil partial size≤100 μm.
The concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4 is detected, and calculates subtracting for PM2.5 and PM10
Efficiency is arranged, the emission reduction efficiency that the emission reduction efficiency of PM2.5 is 63.8%, PM10 is 54.2%.
Embodiment 6
The basic content of the present embodiment with embodiment 1, the difference is that: the additive is by active carbon, coke powder
With kaolin group at the additive presses following mass percentage composition: active carbon 90%, coke powder 7%, kaolin 3%, institute
State kaolin Particle size requirements: 74 μm≤kaolin partial size≤100 μm.
The concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4 is detected, and calculates subtracting for PM2.5 and PM10
Efficiency is arranged, the emission reduction efficiency that the emission reduction efficiency of PM2.5 is 64.2%, PM10 is 51.1%.
Embodiment 7
The basic content of the present embodiment with embodiment 1, the difference is that: the additive by active carbon, coke powder,
Kaolin and zeolite composition, the additive press following mass percentage composition: active carbon 90%, coke powder 7%, kaolin
2%, zeolite 1%.
The concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4 is detected, and calculates subtracting for PM2.5 and PM10
Efficiency is arranged, the emission reduction efficiency that the emission reduction efficiency of PM2.5 is 62.6%, PM10 is 51.7%.
Embodiment 8
The basic content of the present embodiment with embodiment 1, the difference is that: agglomeration process inhibit Ore Sintering Process it is fine
Granular material discharged method:
Step 1: preparation reunion liquid
(A) sodium carboxymethylcellulose 20g, polyacrylamide 20g are weighed by mass parts, by solid particle carboxymethyl cellulose
Sodium 20g, polyacrylamide 20g are uniformly mixed, and obtain mixture A；
(B) additive 4g is weighed by mass parts, be added in mixture A, be uniformly mixed, obtain compound agglomerator；
(C) the compound agglomerator in step (B) is mixed with water, and be uniformly mixed, and the quality of agglomerator and water
The ratio between be 1:2000, then be added Ca (OH)2It is 8 that powder, which adjusts solution PH, and reunion liquid is prepared；
Step 2: subparticle is reunited
In Ore Sintering Process, reunion liquid is added in reunion liquid reservoir part 31, atomization group is installed on flue collector 1
Poly- device 2, the reunion liquid in reunion liquid reservoir part 31 are transported to reunion liquid spray head 33 through air compressor machine 32, and reunion liquid spray head 33 exists
It is atomized in the collapsible tube 21 of agglomeration device 2 and sprays into misty reunion liquid, the particulate matter and reunion liquid in flue gas are in atomization reunion dress
2 reunions are set to contact, soak, adhere to, be nucleated, collide, grow up.Wherein: the mist droplet particle size of the reunion liquid of penetrating is 30-150 μm, often
The straying quatity of reunion liquid is 20ml in cubic meter sintering flue gas.
Being atomized agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23, and flue gas is by 21 arrival end of collapsible tube
Expansion pipe 23 is flowed into atomization agglomeration device 2, then by Cylindrical connecting tube 22, the flue gas in flue collector 1 is by 21 entrance of collapsible tube
End flows into collapsible tube 21, since 21 caliber of collapsible tube becomes smaller rapidly, so that the flue gas flow rate in collapsible tube 21 increases rapidly, reunites
Liquid spray head 33 sprays into misty reunion liquid in the collapsible tube 21 of atomization agglomeration device 2 so that reunion liquid with it is fine in flue gas
Particle and contact, wetting, adherency, since speed increases when flue gas passes through Cylindrical connecting tube 22, in Cylindrical connecting tube 22 and expansion
Pipe 23 generates low pressure, so that the reunion liquid mist drop for being adsorbed with fine particle is nucleated under low voltage situations, collides, growing up, is formed
Bulky grain aggregate.
Step 3: dust-extraction unit trapping
Using bag filter will reunite grow up to be formed bulky grain aggregate removal, that is, utilize bag filter, in turn
It separates particle cluster from gas, realizes the emission reduction of subparticle in flue gas.
Additive presses following mass percentage composition: active carbon 70%, coke powder 30%.
The concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4 is detected, and calculates subtracting for PM2.5 and PM10
Efficiency is arranged, the emission reduction efficiency that the emission reduction efficiency of PM2.5 is 60.7%, PM10 is 43.5%.
33 place plane of reunion liquid spray head and the horizontal distance of 21 arrival end of collapsible tube are L1, are put down where reunion liquid spray head 33
The horizontal distance of face and 21 outlet end of collapsible tube is L2, L2=L1, i.e. 33 place plane of reunion liquid spray head and 21 entrance of collapsible tube
The horizontal distance at end is equal to the horizontal distance of reunion liquid spray head 33 place plane and 21 outlet end of collapsible tube, so that flue gas is being shunk
After pipe 21, flue gas flow rate is mixed with the reunion liquid mist drop after atomization during increasing, is contacted.
Angle between 33 center line of reunion liquid spray head and 21 tube wall of collapsible tube is a, a=30 °, in 21 edge gas of collapsible tube
Stream presents and 21 tube walls parallel state of collapsible tube, and when a=30 °, the speed for the reunion liquid mist drop that reunion liquid spray head 33 sprays into is
V, then it is vcos a along the speed of 21 tube wall of collapsible tube, increases the collision probability of reunion liquid mist drop and particle in flue gas；This
Outside, reunion liquid mist drop is constantly to 21 center movement of collapsible tube, so that also coming into full contact with the flue gas at 21 center of collapsible tube.It shrinks
It is uniformly disposed with 8 reunion liquid spray heads 33 on 21 cross section of pipe, promotes reunion liquid mist drop and the flue gas particle in collapsible tube 21
Contact, wetting, adherency.
The disposed outside of collapsible tube 21 has circulating line 8, and 8 input end of circulating line is connected with 32 outlet end of air compressor machine, ring
8 outlets are provided on shape pipeline 8, and the outlet of circulating line 8 is connected with reunion liquid spray head 33, reunion liquid is by circulating line 8
Flow into reunion liquid spray head 33；8 outlets are provided on circulating line 8, the liquid that can will reunite is uniform and stable from reunion liquid storage unit
Part 31 is transported in reunion liquid spray head 33, so that the uniform and stable penetrating reunion liquid of reunion liquid spray head 33.
Embodiment 9
The basic content of the present embodiment with embodiment 1, the difference is that: agglomeration process inhibit Ore Sintering Process it is fine
Granular material discharged method:
Step 1: preparation reunion liquid
(A) aluminium polychloride 20g, sodium carboxymethylcellulose 40g, polyacrylamide 40g are weighed by mass parts, by solid
Grain aluminium polychloride 20g, sodium carboxymethylcellulose 40g, polyacrylamide 40g are uniformly mixed, obtain mixture A；
(B) additive 5g is weighed by mass parts, be added in mixture A, be uniformly mixed, obtain compound agglomerator；
(C) the compound agglomerator in step (B) is mixed with water, and be uniformly mixed, and the quality of agglomerator and water
The ratio between be 1:10000, then be added Ca (OH)2It is 9 that powder, which adjusts solution PH, and reunion liquid is prepared；
Step 2: subparticle is reunited
In Ore Sintering Process, reunion liquid is added in reunion liquid reservoir part 31, atomization group is installed on flue collector 1
Poly- device 2, the reunion liquid in reunion liquid reservoir part 31 are transported to reunion liquid spray head 33 through air compressor machine 32, and reunion liquid spray head 33 exists
Misty reunion liquid is sprayed into atomization 2 collapsible tube 21 of agglomeration device, the particulate matter and reunion liquid in flue gas are in atomization agglomeration device 2
Reunion is contacted, is soaked, adhering to, being nucleated, colliding, growing up.Wherein: the mist droplet particle size of the reunion liquid of penetrating is 30-150 μm, is often stood
The straying quatity of reunion liquid is 10ml in square rice sintering flue gas.
Being atomized agglomeration device 2 includes collapsible tube 21, Cylindrical connecting tube 22 and expansion pipe 23, and flue gas is by 21 arrival end of collapsible tube
Expansion pipe 23 is flowed into atomization agglomeration device 2, then by Cylindrical connecting tube 22, the flue gas in flue collector 1 is by 21 entrance of collapsible tube
End flows into collapsible tube 21, since 21 caliber of collapsible tube becomes smaller rapidly, so that the flue gas flow rate in collapsible tube 21 increases rapidly, reunites
Liquid spray head 33 sprays into misty reunion liquid in the collapsible tube 21 of atomization agglomeration device 2 so that reunion liquid with it is fine in flue gas
Particle and contact, wetting, adherency, since speed increases when flue gas passes through Cylindrical connecting tube 22, in Cylindrical connecting tube 22 and expansion
Pipe 23 generates low pressure, so that the reunion liquid mist drop for being adsorbed with fine particle is nucleated under low voltage situations, collides, growing up, is formed
Bulky grain aggregate.
Step 3: dust-extraction unit trapping
Using bag filter will reunite grow up to be formed bulky grain aggregate removal, that is, utilize bag filter, in turn
It separates particle cluster from gas, realizes the emission reduction of subparticle in flue gas.
Additive presses following mass percentage composition: active carbon 85%, coke powder 15%.
The concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4 is detected, and calculates subtracting for PM2.5 and PM10
Efficiency is arranged, the emission reduction efficiency that the emission reduction efficiency of PM2.5 is 61.9%, PM10 is 52.6%.
33 place plane of reunion liquid spray head and the horizontal distance of 21 arrival end of collapsible tube are L1, are put down where reunion liquid spray head 33
The horizontal distance of face and 21 outlet end of collapsible tube is L2, L2=0.8L1, i.e. 33 place plane of reunion liquid spray head enters with collapsible tube 21
The horizontal distance at mouth end is greater than the horizontal distance of reunion liquid spray head 33 place plane and 21 outlet end of collapsible tube, so that flue gas is being received
After the draw 21, flue gas flow rate is mixed with the reunion liquid mist drop after atomization during increasing, is contacted.
Angle between 33 center line of reunion liquid spray head and 21 tube wall of collapsible tube is a, a=35 °, in 21 edge gas of collapsible tube
Stream presents and 21 tube walls parallel state of collapsible tube, and when a=35 °, the speed for the reunion liquid mist drop that reunion liquid spray head 33 sprays into is
V, then it is vcos a along the speed of 21 tube wall of collapsible tube, increases the collision probability of reunion liquid mist drop and particle in flue gas；This
Outside, reunion liquid mist drop is constantly to 21 center movement of collapsible tube, so that also coming into full contact with the flue gas at 21 center of collapsible tube.It shrinks
It is uniformly disposed with 2 reunion liquid spray heads 33 on 21 cross section of pipe, promotes reunion liquid mist drop and the flue gas particle in collapsible tube 21
Contact, wetting, adherency.
The disposed outside of collapsible tube 21 has circulating line 8, and 8 input end of circulating line is connected with 32 outlet end of air compressor machine, ring
2 outlets are provided on shape pipeline 8, and the outlet of circulating line 8 is connected with reunion liquid spray head 33, reunion liquid is by circulating line 8
Flow into reunion liquid spray head 33；2 outlets are provided on circulating line 8, the liquid that can will reunite is uniform and stable from reunion liquid storage unit
Part 31 is transported in reunion liquid spray head 33, so that reunion liquid spray head 33 is uniform and stable penetrating reunion liquid.
Embodiment 10
The basic content of the present embodiment with embodiment 1, the difference is that:
As shown in Figure 5 and Figure 6, reunion liquid spray head 33 is provided on collapsible tube 21, and reunion liquid spray head 33 is uniformly arranged
In on the tangent to periphery of 21 cross section of collapsible tube.Reunion liquid spray head 33 is also equipped on expansion pipe 23, and reunion liquid spray head 33 is equal
Even is arranged on the tangent to periphery of expansion 23 cross section of pipe.And collapsible tube 21 and reunion liquid spray head 33 on expansion pipe 23 and same
One reunion liquid reservoir part 31 is connected, and the straying quatity of reunion liquid is 14ml in every cubic metre of sintering flue gas in collapsible tube 21, expands
The straying quatity for opening reunion liquid in every cubic metre of sintering flue gas in pipe 23 is 1ml.
The disposed outside of expansion pipe 23 has circulating line 8, and 8 input end of circulating line is connected with 32 outlet end of air compressor machine, ring
16 outlets are provided on shape pipeline 8, and the outlet of circulating line 8 is connected with reunion liquid spray head 33, reunion liquid is by circulating line 8
Flow into reunion liquid spray head 33；16 outlets are provided on circulating line 8, the liquid that can will reunite is uniform and stable from reunion liquid storage unit
Part 31 is transported in reunion liquid spray head 33, so that the uniform and stable penetrating reunion liquid of reunion liquid spray head 33.
Above-mentioned reunion liquid spray head 33 is connected also by pipeline with air compressor machine 32, air compressor machine 32 and reunion liquid reservoir part 31
It is connected, in which: reunion liquid reservoir part 31 enters reunion liquid spray head 33 for reunion liquid and provide for storing reunion liquid, air compressor machine 32
Power, reunion liquid spray head 33 are used for reunion liquid mist, and spray into atomization agglomeration device 2.Reunion liquid containing agglomerator is in sky
Under the driving of press 32, by flowing into reunion liquid spray head 33 in reunion liquid reservoir part 31, reunion liquid spray head 33 will be atomized reunion liquid
Atomization agglomeration device 2 is sprayed into, the mist droplet particle size after atomization is 30-150 μm.
The concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4 is detected, and calculates subtracting for PM2.5 and PM10
Efficiency is arranged, the emission reduction efficiency that the emission reduction efficiency of PM2.5 is 67.7%, PM10 is 54.5%.
Its reason is: being provided with reunion liquid spray head 33 on collapsible tube 21 and expansion pipe 23.It is fine in collapsible tube 21
Particulate matter comes into full contact with reunion liquid, is agglomerated the wetting of liquid mist drop, adherency, and form reunion core；It is also set on expansion pipe 23
Be equipped with reunion liquid spray head 33, and spray into reunion liquid mist drop after, reunion liquid mist drop again by fine particle formed reunion core moisten
It is wet, when fine particle and reunion core crash, it is easily agglomerated core adherency, and gradually grow up in continuous collision.
Embodiment 11
The basic content of the present embodiment with embodiment 1, the difference is that:
As shown in fig. 7, being provided with reunion liquid spray head 33 on collapsible tube 21, and reunion liquid spray head 33 is uniformly arranged in contraction
On the tangent to periphery of 21 cross section of pipe.Reunion liquid spray head 33, and the uniform cloth of reunion liquid spray head 33 are also equipped on expansion pipe 23
It is placed on the tangent to periphery of expansion 23 cross section of pipe.And mutually independent reunion is respectively arranged on collapsible tube 21 and expansion pipe 23
Liquid adding apparatus 3.Reunion liquid spray head 33 i.e. on collapsible tube 21 is connected with one group of reunion liquid reservoir part 31 and air compressor machine 32, and
Reunion liquid spray head 33 on expansion pipe 23 is connected with another group of reunion liquid reservoir part 31 and air compressor machine 32, so that 21 He of collapsible tube
The reunion liquid of various concentration and type can be sprayed into expansion pipe 23.Wherein collapsible tube 21 spray into reunion liquid in agglomerator with
The mass ratio of water is 1:5000, and the mass ratio for the agglomerator and water in reunion liquid that expansion pipe 23 sprays into is 1:10000, is received
The straying quatity of reunion liquid is 14ml in every cubic metre of sintering flue gas in the draw 21, expands in pipe 23 and rolls into a ball in every cubic metre of sintering flue gas
The straying quatity of poly- liquid is 0.5ml.The disposed outside of expansion pipe 23 has circulating line 8, and 8 input end of circulating line goes out with air compressor machine 32
Mouth end is connected, and 16 outlets is provided on circulating line 8, and the outlet of circulating line 8 is connected with reunion liquid spray head 33, reunion liquid
Reunion liquid spray head 33 is flowed by circulating line 8；16 outlets are provided on circulating line 8, the liquid that can will reunite it is uniform and stable from
Reunion liquid reservoir part 31 is transported in reunion liquid spray head 33, so that the uniform and stable penetrating reunion liquid of reunion liquid spray head 33.
Above-mentioned reunion liquid spray head 33 is connected also by pipeline with air compressor machine 32, air compressor machine 32 and reunion liquid reservoir part 31
It is connected, in which: reunion liquid reservoir part 31 enters reunion liquid spray head 33 for reunion liquid and provide for storing reunion liquid, air compressor machine 32
Power, reunion liquid spray head 33 are used for reunion liquid mist, and spray into atomization agglomeration device 2.Reunion liquid containing agglomerator is in sky
Under the driving of press 32, by flowing into reunion liquid spray head 33 in reunion liquid reservoir part 31, reunion liquid spray head 33 will be atomized reunion liquid
Atomization agglomeration device 2 is sprayed into, the mist droplet particle size after atomization is 30-150 μm.
The concentration of emission of PM2.5 and PM10 in sintering flue gas after dust-extraction unit 4 is detected, and calculates subtracting for PM2.5 and PM10
Efficiency is arranged, the emission reduction efficiency that the emission reduction efficiency of PM2.5 is 67.3%, PM10 is 54.2%.
Emission reduction efficiency is higher than embodiment 1, its reason of Analysis on Mechanism is: the group of being provided on collapsible tube 21 and expansion pipe 23
Poly- liquid spray head 33.Fine particle in collapsible tube 21 comes into full contact with reunion liquid, is agglomerated the wetting of liquid mist drop, adherency, and
Form reunion core；Expansion pipe 23 on be also equipped with reunion liquid spray head 33, and spray into reunion liquid mist drop after, reunion liquid mist drop again will
The reunion core wetting that fine particle is formed easily is agglomerated core adherency when fine particle and reunion core crash, and
It gradually grows up in continuous collision.
In addition, as shown in figure 8, expansion pipe 23 there are two cross section tangent to periphery on be uniformly arranged reunion liquid spray head 33,
That is expansion pipe 23 is provided with two groups of reunion liquid spray heads 33, to realize that classification sprays into reunion liquid mist drop in expansion pipe 23, improves
The service efficiency of reunion liquid.Reason is: reunion liquid mist, which is dripped, sticks the superficial layer for relying primarily on reunion liquid mist and dripping to particulate matter,
When poly- liquid mist drop surface layer is constantly occupied full, and new particulate matter and reunion liquid mist drop are collided due to not reaching the liquid level of droplet and
It cannot be sticked；When the classification of reunion liquid is added, liquid can be reunited constantly in conjunction with subparticle, so that reunion liquid mist drop is sudden and violent always
It is exposed at particle surface layer, new particulate matter can come into full contact with reunion liquid mist dropping liquid face, to improve agglomeration efficiency.
Embodiment 12
The basic content of the present embodiment with embodiment 1, the difference is that:
As shown in figure 9, the reunion liquid spray head 33, which is set to collapsible tube 21, manages interior, reunion liquid spray head 33 and flue collector 1
In airflow direction on the contrary, i.e. reunion liquid mist drop by reunion liquid spray head 33 sprays into 21 central part of collapsible tube, and reunion liquid spray head
33 spray droplet directions with airflow direction in flue collector 1 on the contrary, increase reunion liquid mist drip it is several with the collision of particle in flue gas
Rate；In addition, reunion liquid mist is dripped constantly to 21 center movement of collapsible tube, so that also sufficiently connecing with the flue gas at 21 center of collapsible tube
Touching.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (8)
1. a kind of method that agglomeration process inhibits the discharge of Ore Sintering Process fine particle, it is characterised in that: specific step are as follows:
Step 1: preparation reunion liquid, by sodium carboxymethylcellulose, polyacrylamide and additive are uniformly mixed, and additive is solid
Body additives, solid additive have porous structure；The additive be made of active carbon and coke powder or the additive by
Active carbon and zeolite composition, the activated carbon particle size requirement: 74 μm≤activated carbon particle size≤100 μm, coke powder Particle size requirements: 74
μm≤coke powder partial size≤100 μm；Sized zeolite particles requirement: 74 μm≤sized zeolite particles≤100 μm, agglomerator is prepared, will reunite
Agent and water are mixed with to obtain reunion liquid；
Step 2: subparticle is reunited, and reunion liquid is sprayed into flue gas, work of the fine particle in sintering flue gas in reunion liquid
It is grown up with lower reunion；
Step 3: dust-extraction unit trapping, dust-extraction unit (4) trapping remove the fine particle reunited and grown up.
2. the method that a kind of agglomeration process according to claim 1 inhibits the discharge of Ore Sintering Process fine particle, special
Sign is: agglomerator each component is formed according to following mass parts:
20-40 parts of sodium carboxymethylcellulose；
20-40 parts of polyacrylamide；
2-5 parts of additive.
3. the method that a kind of agglomeration process according to claim 2 inhibits the discharge of Ore Sintering Process fine particle, special
Sign is: step 1: the specific steps of preparation reunion liquid are as follows:
(A) 20-40 parts and polyacrylamide 20-40 parts of sodium carboxymethylcellulose are weighed by mass parts, is uniformly mixed, obtains mixture
A；
(B) 2-5 parts of additive are weighed by mass parts, be added in mixture A, be uniformly mixed, obtain compound agglomerator；
(C) the compound agglomerator in step (B) is mixed with water, and be uniformly mixed, and the mass ratio of agglomerator and water
For 1:2000-10000, reunion liquid is prepared.
4. the method that a kind of agglomeration process according to claim 3 inhibits the discharge of Ore Sintering Process fine particle, special
Sign is: Ca (OH) is added in reunion liquid2Powder, the pH value for adjusting reunion liquid is 8-9.
5. the method that a kind of agglomeration process according to claim 4 inhibits the discharge of Ore Sintering Process fine particle, special
Sign is: the additive is made of active carbon and coke powder, and additive presses following mass percentage composition: active carbon 70-
90%, coke powder 10-30%.
6. the side that a kind of agglomeration process according to claim 1-5 inhibits the discharge of Ore Sintering Process fine particle
Method, it is characterised in that: step 2: the specific steps that subparticle is reunited are as follows:
Exhaust gases passes are the flue collector (1) of sintering flue gas, and atomization agglomeration device (2) is equipped on flue collector (1), in atomization group
Misty reunion liquid mist drop is sprayed into poly- device (2), the fine particle and reunion liquid in flue gas are rolled into a ball in atomization agglomeration device (2)
It is polymerized to core, collision is grown up.
7. the method that a kind of agglomeration process according to claim 6 inhibits the discharge of Ore Sintering Process fine particle, special
Sign is: the mist droplet particle size of the reunion liquid of penetrating is 30-150 μm, and the straying quatity of reunion liquid is 10- in every cubic metre of sintering flue gas
20mL。
8. the method that a kind of agglomeration process according to claim 6 inhibits the discharge of Ore Sintering Process fine particle, special
Sign is: atomization agglomeration device (2) includes collapsible tube (21), Cylindrical connecting tube (22) and expansion pipe (23), reunion liquid spray head
(33) it is uniformly arranged on the tangent to periphery of collapsible tube (21) cross section, reunion liquid spray head (33) center line and collapsible tube (21)
Angle between tube wall is a, a=30 ° or 35 ° or 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610288689.1A CN105797531B (en) | 2016-04-28 | 2016-04-28 | A kind of method that agglomeration process inhibits the discharge of Ore Sintering Process fine particle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610288689.1A CN105797531B (en) | 2016-04-28 | 2016-04-28 | A kind of method that agglomeration process inhibits the discharge of Ore Sintering Process fine particle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105797531A CN105797531A (en) | 2016-07-27 |
| CN105797531B true CN105797531B (en) | 2018-12-04 |
Family
ID=56455205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610288689.1A Active CN105797531B (en) | 2016-04-28 | 2016-04-28 | A kind of method that agglomeration process inhibits the discharge of Ore Sintering Process fine particle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105797531B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018018573A1 (en) * | 2016-07-29 | 2018-02-01 | 国电新能源技术研究院 | Method for removing fine particulate matters in flue gas of coal-fired power plant |
| CN106590811B (en) * | 2016-11-22 | 2018-03-20 | 中冶节能环保有限责任公司 | A kind of method for substantially reducing sintering flue gas pellet and fine particle discharge |
| CN106512632B (en) * | 2016-11-30 | 2018-12-14 | 安徽工业大学 | A kind of sintering flue gas fine particle is turned back capture unit |
| CN106582185A (en) * | 2016-12-29 | 2017-04-26 | 潍坊学院 | Method for removing particulate matters from gas |
| CN107096350B (en) * | 2017-04-26 | 2019-05-14 | 华中科技大学 | A kind of chemical agglomeration promotor and method of collaboration removal coal-fired flue-gas pollutant |
| CN107813760A (en) * | 2017-10-09 | 2018-03-20 | 何昌胜 | Full-automatic multi-functional auto-safety mechanism |
| CN107596838B (en) * | 2017-10-19 | 2019-10-25 | 哈尔滨工业大学（威海） | The spraying bionical reunion dust-extraction unit of vibrating compound |
| CN110215787B (en) * | 2019-05-31 | 2024-02-27 | 华电电力科学研究院有限公司 | Acoustic wave reinforced fine particulate matter removing device and removing method |
| CN114476731B (en) * | 2021-12-24 | 2024-10-11 | 武汉天空蓝环保科技有限公司 | Dry slag bin cooling dust fall waste gas emission reduction device and dry slag treatment system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101513583B (en) * | 2009-02-16 | 2012-07-04 | 华中科技大学 | Coal-fired ultrafine grain chemical agglomeration promotor |
| CN101837213A (en) * | 2009-03-16 | 2010-09-22 | 张顺 | Filter medium and preparation method thereof |
| CN102416363A (en) * | 2011-12-16 | 2012-04-18 | 江苏瑞帆环保装备股份有限公司 | Dust removal method and device based on chemical agglomeration and split linkage anode type electric precipitation |
| CN103405987A (en) * | 2013-09-02 | 2013-11-27 | 三门峡中兴煤炭综合利用研究开发中心 | Raised dust suppression method for semi-coke of upgraded lignite |
| CN104474830B (en) * | 2014-12-12 | 2016-05-11 | 广东电网有限责任公司电力科学研究院 | For removing chemical agglomeration promotor and the using method thereof of coal-fired fine particle |
-
2016
- 2016-04-28 CN CN201610288689.1A patent/CN105797531B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105797531A (en) | 2016-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105797531B (en) | A kind of method that agglomeration process inhibits the discharge of Ore Sintering Process fine particle | |
| CN105727662B (en) | A kind of discharge-reducing method of agglomeration for iron mine flue gas PM10 and PM2.5 | |
| CN106512633B (en) | Turbulent flow and chemical agglomeration couple fine grained agglomeration device | |
| CN103495322B (en) | The apparatus and method of a kind of dedusting demercuration integration | |
| CN104147890B (en) | Utilize attapulgite clay suspension to reunite and trap coal-fired PM 2.5method | |
| CN105833655B (en) | A kind of preparation method for suppressing the granular material discharged reunion liquid of agglomeration for iron mine flue gas fine | |
| CN105854501B (en) | A kind of emission-reducing system of Ore Sintering Process fine particle | |
| CN102657992B (en) | Flue gas PM2.5 (particulate matter 2.5) purification unit and flue gas PM2.5 purification method using tourmaline agglomeration | |
| CN202315626U (en) | Waste gas purification device for combustion test box for laboratory | |
| CN102080558B (en) | Purification and exhaust method for road tunnel without air shaft | |
| CN107998817B (en) | Single tower type fume purifier flue gas purification method | |
| CN205613239U (en) | Desulfurization and denitrification dust remover | |
| CN102080559A (en) | Exhaust airway-free purifying exhaust structure for road tunnel | |
| Qi et al. | Pilot scale test of wet dust removal by high gravity intensification technology in fertilizer plant | |
| CN205672731U (en) | A kind of emission-reducing system sintering flue gas fine particulate matter | |
| CN105797532B (en) | A kind of compound agglomerator of agglomeration for iron mine agglomeration flue gas fine particulate matter emission reduction | |
| CN106178804A (en) | A kind of remove the system of fine particle in gas phase mixture | |
| CN111729504A (en) | Fluidized bed and moving bed coupled composite adsorption reaction device and application | |
| CN207478184U (en) | A kind of SRG pipeline dust removers | |
| CN105276999A (en) | Sintering flue gas waste heat utilization and deep purification method and system thereof | |
| CN204952542U (en) | Novel frit stove flue gas dust removal device | |
| CN103480228A (en) | Smoke dust cooling and collecting device and method capable of reducing PM (particulate matter) 2.5 discharged by coal-fired power plant | |
| CN202605957U (en) | Smoke purification device for ultrasonically agglomerating PM2.5 particles | |
| CN203540225U (en) | Indoor air purifying integrated device | |
| CN108020544B (en) | Salt-containing gas or SRG gas detection system, analysis tower system and salt-containing gas or SRG gas detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20160727 Assignee: Guangxi Beibu Gulf New Material Co.,Ltd. Assignor: ANHUI University OF TECHNOLOGY Contract record no.: X2020980008803 Denomination of invention: A method of agglomerating method to restrain the emission of fine particles in iron ore sintering process Granted publication date: 20181204 License type: Common License Record date: 20201204 |
|
| EE01 | Entry into force of recordation of patent licensing contract |